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[linux.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <[email protected]>
10 * Andy Adamson <[email protected]>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 188 | FATTR4_WORD1_TIME_MODIFY
189 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 190#ifdef CONFIG_NFS_V4_SECURITY_LABEL
191 FATTR4_WORD2_SECURITY_LABEL
192#endif
1da177e4
LT		 193};
194
1549210f
TM		 195static const u32 nfs4_pnfs_open_bitmap[3] = {
196 FATTR4_WORD0_TYPE
197 | FATTR4_WORD0_CHANGE
198 | FATTR4_WORD0_SIZE
199 | FATTR4_WORD0_FSID
200 | FATTR4_WORD0_FILEID,
201 FATTR4_WORD1_MODE
202 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER
204 | FATTR4_WORD1_OWNER_GROUP
205 | FATTR4_WORD1_RAWDEV
206 | FATTR4_WORD1_SPACE_USED
207 | FATTR4_WORD1_TIME_ACCESS
208 | FATTR4_WORD1_TIME_METADATA
209 | FATTR4_WORD1_TIME_MODIFY,
210 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 211#ifdef CONFIG_NFS_V4_SECURITY_LABEL
212 | FATTR4_WORD2_SECURITY_LABEL
213#endif
1549210f
TM		 214};
215
e23008ec
AA		 216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
a09df2ca 222const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
a09df2ca 231const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
dae100c2 237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
55b6e774 241 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 244 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 245};
246
a09df2ca 247const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 264};
265
bc4785cd 266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 267 struct nfs4_readdir_arg *readdir)
268{
0dbb4c67 269 __be32 *start, *p;
1da177e4 270
1da177e4 271 if (cookie > 2) {
b7ef1956 272 readdir->cookie = cookie;
1da177e4
LT		 273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
2b86ce2d 289 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 301 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 313 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
2b86ce2d 317 kunmap_atomic(start);
1da177e4
LT		 318}
319
8478eaa1
N		 320static long nfs4_update_delay(long *timeout)
321{
322 long ret;
323 if (!timeout)
324 return NFS4_POLL_RETRY_MAX;
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
329 ret = *timeout;
330 *timeout <<= 1;
331 return ret;
332}
333
65de872e
TM		 334static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
335{
336 int res = 0;
337
338 might_sleep();
339
8478eaa1
N		 340 freezable_schedule_timeout_killable_unsafe(
341 nfs4_update_delay(timeout));
65de872e
TM		 342 if (fatal_signal_pending(current))
343 res = -ERESTARTSYS;
65de872e
TM		 344 return res;
345}
346
347/* This is the error handling routine for processes that are allowed
348 * to sleep.
349 */
b3c2aa07
TM		 350static int nfs4_do_handle_exception(struct nfs_server *server,
351 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 352{
353 struct nfs_client *clp = server->nfs_client;
9e33bed5 354 struct nfs4_state *state = exception->state;
3114ea7a 355 struct inode *inode = exception->inode;
65de872e
TM		 356 int ret = errorcode;
357
b3c2aa07
TM		 358 exception->delay = 0;
359 exception->recovering = 0;
65de872e
TM		 360 exception->retry = 0;
361 switch(errorcode) {
362 case 0:
363 return 0;
3114ea7a 364 case -NFS4ERR_OPENMODE:
5ba12443
TM		 365 case -NFS4ERR_DELEG_REVOKED:
366 case -NFS4ERR_ADMIN_REVOKED:
367 case -NFS4ERR_BAD_STATEID:
4816fdad
TM		 368 if (inode && nfs_async_inode_return_delegation(inode,
369 NULL) == 0)
370 goto wait_on_recovery;
3114ea7a
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
3114ea7a 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
8ef2f8d4
CL		 392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
03391693 395#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
9f594791 405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 406 goto wait_on_recovery;
03391693 407#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 408 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
65de872e 416 case -NFS4ERR_DELAY:
2598ed34
TM		 417 nfs_inc_server_stats(server, NFSIOS_DELAY);
418 case -NFS4ERR_GRACE:
b3c2aa07
TM		 419 exception->delay = 1;
420 return 0;
421
a8a4ae3a 422 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 423 case -NFS4ERR_OLD_STATEID:
424 exception->retry = 1;
b064eca2
TM		 425 break;
426 case -NFS4ERR_BADOWNER:
427 /* The following works around a Linux server bug! */
428 case -NFS4ERR_BADNAME:
429 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
430 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
431 exception->retry = 1;
432 printk(KERN_WARNING "NFS: v4 server %s "
433 "does not accept raw "
434 "uid/gids. "
435 "Reenabling the idmapper.\n",
436 server->nfs_client->cl_hostname);
437 }
65de872e
TM		 438 }
439 /* We failed to handle the error */
440 return nfs4_map_errors(ret);
0400a6b0 441wait_on_recovery:
b3c2aa07
TM		 442 exception->recovering = 1;
443 return 0;
444}
445
446/* This is the error handling routine for processes that are allowed
447 * to sleep.
448 */
449int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
450{
451 struct nfs_client *clp = server->nfs_client;
452 int ret;
453
454 ret = nfs4_do_handle_exception(server, errorcode, exception);
455 if (exception->delay) {
456 ret = nfs4_delay(server->client, &exception->timeout);
457 goto out_retry;
458 }
459 if (exception->recovering) {
460 ret = nfs4_wait_clnt_recover(clp);
461 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
462 return -EIO;
463 goto out_retry;
464 }
465 return ret;
466out_retry:
a2c0b9e2
TM		 467 if (ret == 0)
468 exception->retry = 1;
469 return ret;
65de872e
TM		 470}
471
037fc980
TM		 472static int
473nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
474 int errorcode, struct nfs4_exception *exception)
475{
476 struct nfs_client *clp = server->nfs_client;
477 int ret;
478
479 ret = nfs4_do_handle_exception(server, errorcode, exception);
480 if (exception->delay) {
481 rpc_delay(task, nfs4_update_delay(&exception->timeout));
482 goto out_retry;
483 }
484 if (exception->recovering) {
485 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
486 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
487 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
488 goto out_retry;
489 }
519ae255 490 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 491 ret = -EIO;
492 return ret;
493out_retry:
a2c0b9e2
TM		 494 if (ret == 0)
495 exception->retry = 1;
496 return ret;
65de872e
TM		 497}
498
037fc980
TM		 499static int
500nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
501 struct nfs4_state *state, long *timeout)
502{
503 struct nfs4_exception exception = {
504 .state = state,
505 };
506
507 if (task->tk_status >= 0)
508 return 0;
509 if (timeout)
510 exception.timeout = *timeout;
511 task->tk_status = nfs4_async_handle_exception(task, server,
512 task->tk_status,
513 &exception);
514 if (exception.delay && timeout)
515 *timeout = exception.timeout;
516 if (exception.retry)
517 return -EAGAIN;
518 return 0;
519}
520
a5250def
WAA		 521/*
522 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
523 * or 'false' otherwise.
524 */
525static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
526{
527 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
528
529 if (flavor == RPC_AUTH_GSS_KRB5I ||
530 flavor == RPC_AUTH_GSS_KRB5P)
531 return true;
532
533 return false;
534}
65de872e 535
452e9352 536static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 537{
1da177e4
LT		 538 spin_lock(&clp->cl_lock);
539 if (time_before(clp->cl_last_renewal,timestamp))
540 clp->cl_last_renewal = timestamp;
541 spin_unlock(&clp->cl_lock);
542}
543
452e9352
TM		 544static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
545{
be824167
TM		 546 struct nfs_client *clp = server->nfs_client;
547
548 if (!nfs4_has_session(clp))
549 do_renew_lease(clp, timestamp);
452e9352
TM		 550}
551
2a3eb2b9
CL		 552struct nfs4_call_sync_data {
553 const struct nfs_server *seq_server;
554 struct nfs4_sequence_args *seq_args;
555 struct nfs4_sequence_res *seq_res;
556};
557
be3a5d23
TM		 558void nfs4_init_sequence(struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 560{
561 args->sa_slot = NULL;
562 args->sa_cache_this = cache_reply;
563 args->sa_privileged = 0;
564
565 res->sr_slot = NULL;
566}
567
568static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
569{
570 args->sa_privileged = 1;
571}
572
cb04ad2a
PT		 573int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
574 struct nfs4_sequence_args *args,
575 struct nfs4_sequence_res *res,
576 struct rpc_task *task)
3bd2384a 577{
3bd2384a
CL		 578 struct nfs4_slot *slot;
579
580 /* slot already allocated? */
581 if (res->sr_slot != NULL)
582 goto out_start;
583
584 spin_lock(&tbl->slot_tbl_lock);
585 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
586 goto out_sleep;
587
588 slot = nfs4_alloc_slot(tbl);
589 if (IS_ERR(slot)) {
590 if (slot == ERR_PTR(-ENOMEM))
591 task->tk_timeout = HZ >> 2;
592 goto out_sleep;
593 }
594 spin_unlock(&tbl->slot_tbl_lock);
595
596 args->sa_slot = slot;
597 res->sr_slot = slot;
598
599out_start:
600 rpc_call_start(task);
601 return 0;
602
603out_sleep:
604 if (args->sa_privileged)
605 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
606 NULL, RPC_PRIORITY_PRIVILEGED);
607 else
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
609 spin_unlock(&tbl->slot_tbl_lock);
610 return -EAGAIN;
611}
cb04ad2a 612EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 613
614static int nfs40_sequence_done(struct rpc_task *task,
615 struct nfs4_sequence_res *res)
616{
617 struct nfs4_slot *slot = res->sr_slot;
618 struct nfs4_slot_table *tbl;
619
cab92c19 620 if (slot == NULL)
3bd2384a
CL		 621 goto out;
622
623 tbl = slot->table;
624 spin_lock(&tbl->slot_tbl_lock);
625 if (!nfs41_wake_and_assign_slot(tbl, slot))
626 nfs4_free_slot(tbl, slot);
627 spin_unlock(&tbl->slot_tbl_lock);
628
629 res->sr_slot = NULL;
630out:
631 return 1;
632}
633
cccef3b9
AA		 634#if defined(CONFIG_NFS_V4_1)
635
d185a334 636static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 637{
e3725ec0 638 struct nfs4_session *session;
13615871 639 struct nfs4_slot_table *tbl;
a13ce7c6 640 struct nfs4_slot *slot = res->sr_slot;
c10e4498 641 bool send_new_highest_used_slotid = false;
13615871 642
a13ce7c6 643 tbl = slot->table;
e3725ec0 644 session = tbl->session;
ea028ac9 645
35dc1d74 646 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 647 /* Be nice to the server: try to ensure that the last transmitted
648 * value for highest_user_slotid <= target_highest_slotid
649 */
650 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
651 send_new_highest_used_slotid = true;
652
a13ce7c6 653 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 654 send_new_highest_used_slotid = false;
655 goto out_unlock;
656 }
a13ce7c6 657 nfs4_free_slot(tbl, slot);
c10e4498
TM		 658
659 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
660 send_new_highest_used_slotid = false;
b75ad4cd 661out_unlock:
35dc1d74 662 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 663 res->sr_slot = NULL;
c10e4498 664 if (send_new_highest_used_slotid)
3f10a6af 665 nfs41_notify_server(session->clp);
13615871
AA		 666}
667
f9c96fcc 668int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 669{
e3725ec0 670 struct nfs4_session *session;
a13ce7c6 671 struct nfs4_slot *slot = res->sr_slot;
14516c3a 672 struct nfs_client *clp;
ac20d163 673 bool interrupted = false;
85563073 674 int ret = 1;
b0df806c 675
a13ce7c6
TM		 676 if (slot == NULL)
677 goto out_noaction;
468f8613
BS		 678 /* don't increment the sequence number if the task wasn't sent */
679 if (!RPC_WAS_SENT(task))
b0df806c
AA		 680 goto out;
681
e3725ec0 682 session = slot->table->session;
933602e3 683
ac20d163
TM		 684 if (slot->interrupted) {
685 slot->interrupted = 0;
686 interrupted = true;
687 }
688
2f92ae34 689 trace_nfs4_sequence_done(session, res);
691daf3b 690 /* Check the SEQUENCE operation status */
14516c3a
TM		 691 switch (res->sr_status) {
692 case 0:
b0df806c 693 /* Update the slot's sequence and clientid lease timer */
933602e3 694 ++slot->seq_nr;
e3725ec0 695 clp = session->clp;
8e63b6a8 696 do_renew_lease(clp, res->sr_timestamp);
0629e370 697 /* Check sequence flags */
b15c7cdd 698 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 699 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 700 break;
ac20d163
TM		 701 case 1:
702 /*
703 * sr_status remains 1 if an RPC level error occurred.
704 * The server may or may not have processed the sequence
705 * operation..
706 * Mark the slot as having hosted an interrupted RPC call.
707 */
708 slot->interrupted = 1;
709 goto out;
14516c3a
TM		 710 case -NFS4ERR_DELAY:
711 /* The server detected a resend of the RPC call and
712 * returned NFS4ERR_DELAY as per Section 2.10.6.2
713 * of RFC5661.
714 */
df2fabff 715 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 716 __func__,
df2fabff 717 slot->slot_nr,
933602e3 718 slot->seq_nr);
14516c3a 719 goto out_retry;
85563073
TM		 720 case -NFS4ERR_BADSLOT:
721 /*
722 * The slot id we used was probably retired. Try again
723 * using a different slot id.
724 */
e8794440
TM		 725 goto retry_nowait;
726 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 727 /*
728 * Was the last operation on this sequence interrupted?
729 * If so, retry after bumping the sequence number.
730 */
731 if (interrupted) {
732 ++slot->seq_nr;
733 goto retry_nowait;
734 }
e8794440
TM		 735 /*
736 * Could this slot have been previously retired?
737 * If so, then the server may be expecting seq_nr = 1!
738 */
8e63b6a8
TM		 739 if (slot->seq_nr != 1) {
740 slot->seq_nr = 1;
741 goto retry_nowait;
742 }
743 break;
e8794440
TM		 744 case -NFS4ERR_SEQ_FALSE_RETRY:
745 ++slot->seq_nr;
746 goto retry_nowait;
14516c3a
TM		 747 default:
748 /* Just update the slot sequence no. */
933602e3 749 ++slot->seq_nr;
b0df806c
AA		 750 }
751out:
752 /* The session may be reset by one of the error handlers. */
753 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 754 nfs41_sequence_free_slot(res);
a13ce7c6 755out_noaction:
85563073 756 return ret;
e8794440
TM		 757retry_nowait:
758 if (rpc_restart_call_prepare(task)) {
759 task->tk_status = 0;
760 ret = 0;
761 }
762 goto out;
14516c3a 763out_retry:
d05dd4e9 764 if (!rpc_restart_call(task))
14516c3a
TM		 765 goto out;
766 rpc_delay(task, NFS4_POLL_RETRY_MAX);
767 return 0;
b0df806c 768}
f9c96fcc 769EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 770
2c4b131d 771int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 772{
e3725ec0 773 if (res->sr_slot == NULL)
14516c3a 774 return 1;
3bd2384a
CL		 775 if (!res->sr_slot->table->session)
776 return nfs40_sequence_done(task, res);
14516c3a 777 return nfs41_sequence_done(task, res);
df896455 778}
2c4b131d 779EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 780
dc70d7b3 781int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 782 struct nfs4_sequence_args *args,
783 struct nfs4_sequence_res *res,
ce5039c1
AA		 784 struct rpc_task *task)
785{
fbcd4abc
AA		 786 struct nfs4_slot *slot;
787 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 788
789 dprintk("--> %s\n", __func__);
ce5039c1 790 /* slot already allocated? */
dfb4f309 791 if (res->sr_slot != NULL)
d9afbd1b 792 goto out_success;
ce5039c1 793
fbcd4abc
AA		 794 tbl = &session->fc_slot_table;
795
69d206b5
TM		 796 task->tk_timeout = 0;
797
fbcd4abc 798 spin_lock(&tbl->slot_tbl_lock);
774d5f14 799 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 800 !args->sa_privileged) {
0b1c8fc4 801 /* The state manager will wait until the slot table is empty */
0b1c8fc4 802 dprintk("%s session is draining\n", __func__);
7b939a3f 803 goto out_sleep;
689cf5c1
AB		 804 }
805
2dc03b7f 806 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 807 if (IS_ERR(slot)) {
808 /* If out of memory, try again in 1/4 second */
809 if (slot == ERR_PTR(-ENOMEM))
810 task->tk_timeout = HZ >> 2;
fbcd4abc 811 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 812 goto out_sleep;
fbcd4abc
AA		 813 }
814 spin_unlock(&tbl->slot_tbl_lock);
815
2b2fa717 816 args->sa_slot = slot;
fbcd4abc 817
e8d92382 818 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 819 slot->slot_nr, slot->seq_nr);
fbcd4abc 820
dfb4f309 821 res->sr_slot = slot;
8e63b6a8 822 res->sr_timestamp = jiffies;
2a6e26cd 823 res->sr_status_flags = 0;
fbcd4abc
AA		 824 /*
825 * sr_status is only set in decode_sequence, and so will remain
826 * set to 1 if an rpc level failure occurs.
827 */
828 res->sr_status = 1;
2f92ae34 829 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 830out_success:
831 rpc_call_start(task);
ce5039c1 832 return 0;
7b939a3f 833out_sleep:
8fe72bac
TM		 834 /* Privileged tasks are queued with top priority */
835 if (args->sa_privileged)
1e1093c7
TM		 836 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
837 NULL, RPC_PRIORITY_PRIVILEGED);
838 else
839 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 840 spin_unlock(&tbl->slot_tbl_lock);
841 return -EAGAIN;
ce5039c1 842}
dc70d7b3 843EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 844
5a580e0a
CL		 845static int nfs4_setup_sequence(const struct nfs_server *server,
846 struct nfs4_sequence_args *args,
847 struct nfs4_sequence_res *res,
848 struct rpc_task *task)
ce5039c1 849{
035168ab 850 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 851 int ret = 0;
852
3bd2384a 853 if (!session)
cb04ad2a
PT		 854 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
855 args, res, task);
035168ab 856
e8d92382 857 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 858 __func__, session->clp, session, res->sr_slot ?
e8d92382 859 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 860
9d12b216 861 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 862
ce5039c1
AA		 863 dprintk("<-- %s status=%d\n", __func__, ret);
864 return ret;
865}
866
ce5039c1
AA		 867static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
868{
2a3eb2b9 869 struct nfs4_call_sync_data *data = calldata;
6ba7db34 870 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 871
035168ab
TM		 872 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
873
d9afbd1b 874 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 875}
876
69ab40c4
AA		 877static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
878{
2a3eb2b9 879 struct nfs4_call_sync_data *data = calldata;
69ab40c4 880
14516c3a 881 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 882}
883
17280175 884static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 885 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 886 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 887};
888
3bd2384a
CL		 889#else /* !CONFIG_NFS_V4_1 */
890
9915ea7e
CL		 891static int nfs4_setup_sequence(const struct nfs_server *server,
892 struct nfs4_sequence_args *args,
893 struct nfs4_sequence_res *res,
894 struct rpc_task *task)
895{
cb04ad2a
PT		 896 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
897 args, res, task);
9915ea7e
CL		 898}
899
2c4b131d
PT		 900int nfs4_sequence_done(struct rpc_task *task,
901 struct nfs4_sequence_res *res)
9915ea7e 902{
3bd2384a 903 return nfs40_sequence_done(task, res);
9915ea7e 904}
2c4b131d 905EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 906
907#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 908
909static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
910{
911 struct nfs4_call_sync_data *data = calldata;
912 nfs4_setup_sequence(data->seq_server,
913 data->seq_args, data->seq_res, task);
914}
915
916static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
917{
918 struct nfs4_call_sync_data *data = calldata;
919 nfs4_sequence_done(task, data->seq_res);
920}
921
922static const struct rpc_call_ops nfs40_call_sync_ops = {
923 .rpc_call_prepare = nfs40_call_sync_prepare,
924 .rpc_call_done = nfs40_call_sync_done,
925};
926
7c513058
BS		 927static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
928 struct nfs_server *server,
ce5039c1
AA		 929 struct rpc_message *msg,
930 struct nfs4_sequence_args *args,
8fe72bac 931 struct nfs4_sequence_res *res)
ce5039c1
AA		 932{
933 int ret;
934 struct rpc_task *task;
9915ea7e 935 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 936 struct nfs4_call_sync_data data = {
035168ab 937 .seq_server = server,
ce5039c1
AA		 938 .seq_args = args,
939 .seq_res = res,
ce5039c1
AA		 940 };
941 struct rpc_task_setup task_setup = {
7c513058 942 .rpc_client = clnt,
ce5039c1 943 .rpc_message = msg,
9915ea7e 944 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 945 .callback_data = &data
946 };
947
ce5039c1
AA		 948 task = rpc_run_task(&task_setup);
949 if (IS_ERR(task))
950 ret = PTR_ERR(task);
951 else {
952 ret = task->tk_status;
953 rpc_put_task(task);
954 }
955 return ret;
956}
957
7c513058
BS		 958int nfs4_call_sync(struct rpc_clnt *clnt,
959 struct nfs_server *server,
e73b83f2
BS		 960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
962 struct nfs4_sequence_res *res,
963 int cache_reply)
964{
a9c92d6b 965 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 966 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 967}
cccef3b9 968
38478b24 969static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 970{
38478b24 971 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 972
38478b24 973 spin_lock(&dir->i_lock);
359d7d1c 974 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 975 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 976 nfs_force_lookup_revalidate(dir);
a9a4a87a 977 dir->i_version = cinfo->after;
3235b403 978 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 979 nfs_fscache_invalidate(dir);
38478b24 980 spin_unlock(&dir->i_lock);
1da177e4
LT		 981}
982
e56e0b78 983struct nfs4_opendata {
c6d00e63 984 struct kref kref;
e56e0b78
TM		 985 struct nfs_openargs o_arg;
986 struct nfs_openres o_res;
cdd4e68b
TM		 987 struct nfs_open_confirmargs c_arg;
988 struct nfs_open_confirmres c_res;
6926afd1
TM		 989 struct nfs4_string owner_name;
990 struct nfs4_string group_name;
a49c2691 991 struct nfs4_label *a_label;
e56e0b78 992 struct nfs_fattr f_attr;
1775fd3e 993 struct nfs4_label *f_label;
e56e0b78 994 struct dentry *dir;
82a2c1b7 995 struct dentry *dentry;
e56e0b78 996 struct nfs4_state_owner *owner;
aac00a8d 997 struct nfs4_state *state;
e56e0b78 998 struct iattr attrs;
26e976a8 999 unsigned long timestamp;
3e309914 1000 unsigned int rpc_done : 1;
5bc2afc2 1001 unsigned int file_created : 1;
bdeca1b7 1002 unsigned int is_recover : 1;
24ac23ab
TM		 1003 int rpc_status;
1004 int cancelled;
e56e0b78
TM		 1005};
1006
49f9a0fa
TM		 1007static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1008 int err, struct nfs4_exception *exception)
1009{
1010 if (err != -EINVAL)
1011 return false;
1012 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1013 return false;
1014 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1015 exception->retry = 1;
1016 return true;
1017}
1018
6ae37339
TM		 1019static u32
1020nfs4_map_atomic_open_share(struct nfs_server *server,
1021 fmode_t fmode, int openflags)
1022{
1023 u32 res = 0;
1024
1025 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1026 case FMODE_READ:
1027 res = NFS4_SHARE_ACCESS_READ;
1028 break;
1029 case FMODE_WRITE:
1030 res = NFS4_SHARE_ACCESS_WRITE;
1031 break;
1032 case FMODE_READ|FMODE_WRITE:
1033 res = NFS4_SHARE_ACCESS_BOTH;
1034 }
1035 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1036 goto out;
1037 /* Want no delegation if we're using O_DIRECT */
1038 if (openflags & O_DIRECT)
1039 res |= NFS4_SHARE_WANT_NO_DELEG;
1040out:
1041 return res;
1042}
1043
49f9a0fa
TM		 1044static enum open_claim_type4
1045nfs4_map_atomic_open_claim(struct nfs_server *server,
1046 enum open_claim_type4 claim)
1047{
1048 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1049 return claim;
1050 switch (claim) {
1051 default:
1052 return claim;
1053 case NFS4_OPEN_CLAIM_FH:
1054 return NFS4_OPEN_CLAIM_NULL;
1055 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1056 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1057 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1058 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1059 }
1060}
2ced46c2
TM		 1061
1062static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1063{
1064 p->o_res.f_attr = &p->f_attr;
1775fd3e 1065 p->o_res.f_label = p->f_label;
c1d51931
TM		 1066 p->o_res.seqid = p->o_arg.seqid;
1067 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1068 p->o_res.server = p->o_arg.server;
5f657530 1069 p->o_res.access_request = p->o_arg.access;
2ced46c2 1070 nfs_fattr_init(&p->f_attr);
6926afd1 1071 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1072}
1073
82a2c1b7 1074static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1075 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1076 const struct iattr *attrs,
1775fd3e 1077 struct nfs4_label *label,
4a1c0893 1078 enum open_claim_type4 claim,
8535b2be 1079 gfp_t gfp_mask)
e56e0b78 1080{
82a2c1b7 1081 struct dentry *parent = dget_parent(dentry);
2b0143b5 1082 struct inode *dir = d_inode(parent);
e56e0b78 1083 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1084 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1085 struct nfs4_opendata *p;
1086
8535b2be 1087 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1088 if (p == NULL)
1089 goto err;
14c43f76
DQ		 1090
1091 p->f_label = nfs4_label_alloc(server, gfp_mask);
1092 if (IS_ERR(p->f_label))
1093 goto err_free_p;
1094
a49c2691
KM		 1095 p->a_label = nfs4_label_alloc(server, gfp_mask);
1096 if (IS_ERR(p->a_label))
1097 goto err_free_f;
1098
63f5f796
TM		 1099 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1100 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1101 if (IS_ERR(p->o_arg.seqid))
14c43f76 1102 goto err_free_label;
82a2c1b7
AV		 1103 nfs_sb_active(dentry->d_sb);
1104 p->dentry = dget(dentry);
e56e0b78
TM		 1105 p->dir = parent;
1106 p->owner = sp;
1107 atomic_inc(&sp->so_count);
dc0b027d
TM		 1108 p->o_arg.open_flags = flags;
1109 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1110 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1111 fmode, flags);
ae2bb032
WAA		 1112 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1113 * will return permission denied for all bits until close */
1114 if (!(flags & O_EXCL)) {
1115 /* ask server to check for all possible rights as results
1116 * are cached */
1117 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1118 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1119 }
7539bbab 1120 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1121 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1122 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1123 p->o_arg.name = &dentry->d_name;
e56e0b78 1124 p->o_arg.server = server;
aa9c2669 1125 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1126 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1127 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1128 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1129 switch (p->o_arg.claim) {
4a1c0893
TM		 1130 case NFS4_OPEN_CLAIM_NULL:
1131 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1132 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1133 p->o_arg.fh = NFS_FH(dir);
1134 break;
1135 case NFS4_OPEN_CLAIM_PREVIOUS:
1136 case NFS4_OPEN_CLAIM_FH:
1137 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1138 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1139 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1140 }
536e43d1 1141 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1142 __u32 verf[2];
d77d76ff 1143
e56e0b78
TM		 1144 p->o_arg.u.attrs = &p->attrs;
1145 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1146
1147 verf[0] = jiffies;
1148 verf[1] = current->pid;
1149 memcpy(p->o_arg.u.verifier.data, verf,
1150 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1151 }
cdd4e68b
TM		 1152 p->c_arg.fh = &p->o_res.fh;
1153 p->c_arg.stateid = &p->o_res.stateid;
1154 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1155 nfs4_init_opendata_res(p);
c6d00e63 1156 kref_init(&p->kref);
e56e0b78 1157 return p;
14c43f76
DQ		 1158
1159err_free_label:
a49c2691
KM		 1160 nfs4_label_free(p->a_label);
1161err_free_f:
14c43f76
DQ		 1162 nfs4_label_free(p->f_label);
1163err_free_p:
e56e0b78
TM		 1164 kfree(p);
1165err:
1166 dput(parent);
1167 return NULL;
1168}
1169
c6d00e63 1170static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1171{
c6d00e63
TM		 1172 struct nfs4_opendata *p = container_of(kref,
1173 struct nfs4_opendata, kref);
82a2c1b7 1174 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1175
1176 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1177 if (p->state != NULL)
1178 nfs4_put_open_state(p->state);
c6d00e63 1179 nfs4_put_state_owner(p->owner);
14c43f76 1180
a49c2691 1181 nfs4_label_free(p->a_label);
14c43f76
DQ		 1182 nfs4_label_free(p->f_label);
1183
c6d00e63 1184 dput(p->dir);
82a2c1b7
AV		 1185 dput(p->dentry);
1186 nfs_sb_deactive(sb);
6926afd1 1187 nfs_fattr_free_names(&p->f_attr);
e911b815 1188 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1189 kfree(p);
1190}
1191
1192static void nfs4_opendata_put(struct nfs4_opendata *p)
1193{
1194 if (p != NULL)
1195 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1196}
1197
06f814a3
TM		 1198static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1199{
06f814a3
TM		 1200 int ret;
1201
06f814a3 1202 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1203 return ret;
1204}
1205
24311f88
TM		 1206static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1207 fmode_t fmode)
1208{
1209 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1210 case FMODE_READ|FMODE_WRITE:
1211 return state->n_rdwr != 0;
1212 case FMODE_WRITE:
1213 return state->n_wronly != 0;
1214 case FMODE_READ:
1215 return state->n_rdonly != 0;
1216 }
1217 WARN_ON_ONCE(1);
1218 return false;
1219}
1220
dc0b027d 1221static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1222{
1223 int ret = 0;
dc0b027d 1224
536e43d1 1225 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1226 goto out;
1227 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1228 case FMODE_READ:
88069f77
TM		 1229 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1230 && state->n_rdonly != 0;
6ee41268
TM		 1231 break;
1232 case FMODE_WRITE:
88069f77
TM		 1233 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1234 && state->n_wronly != 0;
6ee41268
TM		 1235 break;
1236 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1237 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1238 && state->n_rdwr != 0;
6ee41268 1239 }
dc0b027d 1240out:
6ee41268
TM		 1241 return ret;
1242}
1243
2a606188
TM		 1244static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1245 enum open_claim_type4 claim)
aac00a8d 1246{
652f89f6
TM		 1247 if (delegation == NULL)
1248 return 0;
dc0b027d 1249 if ((delegation->type & fmode) != fmode)
aac00a8d 1250 return 0;
d25be546
TM		 1251 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1252 return 0;
2a606188
TM		 1253 switch (claim) {
1254 case NFS4_OPEN_CLAIM_NULL:
1255 case NFS4_OPEN_CLAIM_FH:
1256 break;
1257 case NFS4_OPEN_CLAIM_PREVIOUS:
1258 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1259 break;
1260 default:
1261 return 0;
1262 }
b7391f44 1263 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1264 return 1;
1265}
1266
dc0b027d 1267static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1268{
dc0b027d 1269 switch (fmode) {
e7616923
TM		 1270 case FMODE_WRITE:
1271 state->n_wronly++;
1272 break;
1273 case FMODE_READ:
1274 state->n_rdonly++;
1275 break;
1276 case FMODE_READ|FMODE_WRITE:
1277 state->n_rdwr++;
1278 }
dc0b027d 1279 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1280}
1281
4f14c194
TM		 1282static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1283{
1284 struct nfs_client *clp = state->owner->so_server->nfs_client;
1285 bool need_recover = false;
1286
1287 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1288 need_recover = true;
1289 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1290 need_recover = true;
1291 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1292 need_recover = true;
1293 if (need_recover)
1294 nfs4_state_mark_reclaim_nograce(clp, state);
1295}
1296
e999e80e
TM		 1297static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1298 nfs4_stateid *stateid)
1299{
1300 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1301 return true;
4f14c194
TM		 1302 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1303 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1304 return true;
4f14c194 1305 }
e999e80e
TM		 1306 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1307 return true;
1308 return false;
1309}
1310
f95549cf
TM		 1311static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1312{
3c38cbe2
TM		 1313 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1314 return;
f95549cf
TM		 1315 if (state->n_wronly)
1316 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1317 if (state->n_rdonly)
1318 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1319 if (state->n_rdwr)
1320 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1321 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1322}
1323
226056c5 1324static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1325 nfs4_stateid *arg_stateid,
226056c5 1326 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1327{
226056c5
TM		 1328 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1329 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1330 case FMODE_WRITE:
1331 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1332 break;
1333 case FMODE_READ:
1334 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1335 break;
1336 case 0:
1337 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1338 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1339 clear_bit(NFS_OPEN_STATE, &state->flags);
1340 }
1341 if (stateid == NULL)
1342 return;
f95549cf 1343 /* Handle races with OPEN */
4a1e2feb
TM		 1344 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1345 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1346 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1347 nfs_resync_open_stateid_locked(state);
226056c5 1348 return;
f95549cf 1349 }
003707c7 1350 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1351 nfs4_stateid_copy(&state->stateid, stateid);
1352 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1353}
1354
4a1e2feb
TM		 1355static void nfs_clear_open_stateid(struct nfs4_state *state,
1356 nfs4_stateid *arg_stateid,
1357 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1358{
1359 write_seqlock(&state->seqlock);
4a1e2feb 1360 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1361 write_sequnlock(&state->seqlock);
4f14c194
TM		 1362 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1363 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1364}
1365
dc0b027d 1366static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1367{
dc0b027d 1368 switch (fmode) {
003707c7
TM		 1369 case FMODE_READ:
1370 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1371 break;
1372 case FMODE_WRITE:
1373 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1374 break;
1375 case FMODE_READ|FMODE_WRITE:
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
1377 }
e999e80e
TM		 1378 if (!nfs_need_update_open_stateid(state, stateid))
1379 return;
1380 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1381 nfs4_stateid_copy(&state->stateid, stateid);
1382 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1383}
1384
dc0b027d 1385static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1386{
8bda4e4c
TM		 1387 /*
1388 * Protect the call to nfs4_state_set_mode_locked and
1389 * serialise the stateid update
1390 */
361cad3c 1391 spin_lock(&state->owner->so_lock);
8bda4e4c 1392 write_seqlock(&state->seqlock);
003707c7 1393 if (deleg_stateid != NULL) {
f597c537 1394 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1395 set_bit(NFS_DELEGATED_STATE, &state->flags);
1396 }
1397 if (open_stateid != NULL)
dc0b027d 1398 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c 1399 write_sequnlock(&state->seqlock);
dc0b027d 1400 update_open_stateflags(state, fmode);
ec073428 1401 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1402}
1403
dc0b027d 1404static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1405{
1406 struct nfs_inode *nfsi = NFS_I(state->inode);
1407 struct nfs_delegation *deleg_cur;
1408 int ret = 0;
1409
dc0b027d 1410 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1411
1412 rcu_read_lock();
1413 deleg_cur = rcu_dereference(nfsi->delegation);
1414 if (deleg_cur == NULL)
1415 goto no_delegation;
1416
1417 spin_lock(&deleg_cur->lock);
17f26b12 1418 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1419 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1420 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1421 goto no_delegation_unlock;
1422
1423 if (delegation == NULL)
1424 delegation = &deleg_cur->stateid;
f597c537 1425 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1426 goto no_delegation_unlock;
1427
b7391f44 1428 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1429 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1430 ret = 1;
1431no_delegation_unlock:
1432 spin_unlock(&deleg_cur->lock);
1433no_delegation:
1434 rcu_read_unlock();
1435
1436 if (!ret && open_stateid != NULL) {
dc0b027d 1437 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1438 ret = 1;
1439 }
4f14c194
TM		 1440 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1441 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1442
1443 return ret;
1444}
1445
39071e6f
TM		 1446static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1447 const nfs4_stateid *stateid)
1448{
1449 struct nfs4_state *state = lsp->ls_state;
1450 bool ret = false;
1451
1452 spin_lock(&state->state_lock);
1453 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1454 goto out_noupdate;
1455 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1456 goto out_noupdate;
1457 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1458 ret = true;
1459out_noupdate:
1460 spin_unlock(&state->state_lock);
1461 return ret;
1462}
34310430 1463
dc0b027d 1464static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1465{
1466 struct nfs_delegation *delegation;
1467
1468 rcu_read_lock();
1469 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1470 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1471 rcu_read_unlock();
1472 return;
1473 }
1474 rcu_read_unlock();
57ec14c5 1475 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1476}
1477
6ee41268 1478static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1479{
1480 struct nfs4_state *state = opendata->state;
1481 struct nfs_inode *nfsi = NFS_I(state->inode);
1482 struct nfs_delegation *delegation;
f448badd 1483 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1484 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1485 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1486 nfs4_stateid stateid;
1487 int ret = -EAGAIN;
1488
aac00a8d 1489 for (;;) {
61beef75 1490 spin_lock(&state->owner->so_lock);
dc0b027d 1491 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1492 update_open_stateflags(state, fmode);
6ee41268 1493 spin_unlock(&state->owner->so_lock);
61beef75 1494 goto out_return_state;
6ee41268 1495 }
61beef75 1496 spin_unlock(&state->owner->so_lock);
34310430
TM		 1497 rcu_read_lock();
1498 delegation = rcu_dereference(nfsi->delegation);
2a606188 1499 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1500 rcu_read_unlock();
aac00a8d 1501 break;
34310430 1502 }
aac00a8d 1503 /* Save the delegation */
f597c537 1504 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1505 rcu_read_unlock();
fa332941 1506 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1507 if (!opendata->is_recover) {
1508 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1509 if (ret != 0)
1510 goto out;
1511 }
aac00a8d 1512 ret = -EAGAIN;
34310430
TM		 1513
1514 /* Try to update the stateid using the delegation */
dc0b027d 1515 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1516 goto out_return_state;
aac00a8d 1517 }
aac00a8d
TM		 1518out:
1519 return ERR_PTR(ret);
1520out_return_state:
1521 atomic_inc(&state->count);
1522 return state;
1523}
1524
e23008ec
AA		 1525static void
1526nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1527{
1528 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1529 struct nfs_delegation *delegation;
1530 int delegation_flags = 0;
1531
1532 rcu_read_lock();
1533 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1534 if (delegation)
1535 delegation_flags = delegation->flags;
1536 rcu_read_unlock();
72d79ff8
TM		 1537 switch (data->o_arg.claim) {
1538 default:
1539 break;
1540 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1541 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1542 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1543 "returning a delegation for "
1544 "OPEN(CLAIM_DELEGATE_CUR)\n",
1545 clp->cl_hostname);
72d79ff8
TM		 1546 return;
1547 }
1548 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1549 nfs_inode_set_delegation(state->inode,
1550 data->owner->so_cred,
1551 &data->o_res);
1552 else
1553 nfs_inode_reclaim_delegation(state->inode,
1554 data->owner->so_cred,
1555 &data->o_res);
1556}
1557
1558/*
1559 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1560 * and update the nfs4_state.
1561 */
1562static struct nfs4_state *
1563_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1564{
1565 struct inode *inode = data->state->inode;
1566 struct nfs4_state *state = data->state;
1567 int ret;
1568
d2bfda2e
WAA		 1569 if (!data->rpc_done) {
1570 if (data->rpc_status) {
1571 ret = data->rpc_status;
1572 goto err;
1573 }
1574 /* cached opens have already been processed */
1575 goto update;
e23008ec
AA		 1576 }
1577
e23008ec
AA		 1578 ret = nfs_refresh_inode(inode, &data->f_attr);
1579 if (ret)
1580 goto err;
1581
1582 if (data->o_res.delegation_type != 0)
1583 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1584update:
e23008ec
AA		 1585 update_open_stateid(state, &data->o_res.stateid, NULL,
1586 data->o_arg.fmode);
d49f042a 1587 atomic_inc(&state->count);
e23008ec
AA		 1588
1589 return state;
1590err:
1591 return ERR_PTR(ret);
1592
1593}
1594
1595static struct nfs4_state *
1596_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1597{
1598 struct inode *inode;
1599 struct nfs4_state *state = NULL;
1b370bc2 1600 int ret;
24ac23ab 1601
aac00a8d 1602 if (!data->rpc_done) {
6ee41268 1603 state = nfs4_try_open_cached(data);
9759b0fb 1604 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1605 goto out;
1606 }
1607
1b370bc2 1608 ret = -EAGAIN;
24ac23ab 1609 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1610 goto err;
1775fd3e 1611 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1612 ret = PTR_ERR(inode);
03f28e3a 1613 if (IS_ERR(inode))
1b370bc2
TM		 1614 goto err;
1615 ret = -ENOMEM;
24ac23ab
TM		 1616 state = nfs4_get_open_state(inode, data->owner);
1617 if (state == NULL)
1b370bc2 1618 goto err_put_inode;
e23008ec
AA		 1619 if (data->o_res.delegation_type != 0)
1620 nfs4_opendata_check_deleg(data, state);
34310430 1621 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1622 data->o_arg.fmode);
24ac23ab 1623 iput(inode);
aac00a8d 1624out:
7aa262b5 1625 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1626 return state;
1b370bc2
TM		 1627err_put_inode:
1628 iput(inode);
1629err:
1630 return ERR_PTR(ret);
24ac23ab
TM		 1631}
1632
e23008ec
AA		 1633static struct nfs4_state *
1634nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1635{
1636 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1637 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1638 return _nfs4_opendata_to_nfs4_state(data);
1639}
1640
864472e9
TM		 1641static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1642{
1643 struct nfs_inode *nfsi = NFS_I(state->inode);
1644 struct nfs_open_context *ctx;
1645
1646 spin_lock(&state->inode->i_lock);
1647 list_for_each_entry(ctx, &nfsi->open_files, list) {
1648 if (ctx->state != state)
1649 continue;
1650 get_nfs_open_context(ctx);
1651 spin_unlock(&state->inode->i_lock);
1652 return ctx;
1653 }
1654 spin_unlock(&state->inode->i_lock);
1655 return ERR_PTR(-ENOENT);
1656}
1657
4a1c0893
TM		 1658static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1659 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1660{
1661 struct nfs4_opendata *opendata;
1662
4a1c0893 1663 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1664 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1665 if (opendata == NULL)
1666 return ERR_PTR(-ENOMEM);
1667 opendata->state = state;
1668 atomic_inc(&state->count);
1669 return opendata;
1670}
1671
24311f88
TM		 1672static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1673 fmode_t fmode)
864472e9 1674{
2ced46c2 1675 struct nfs4_state *newstate;
864472e9
TM		 1676 int ret;
1677
24311f88 1678 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1679 return 0;
dc0b027d
TM		 1680 opendata->o_arg.open_flags = 0;
1681 opendata->o_arg.fmode = fmode;
be36e185
TM		 1682 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1683 NFS_SB(opendata->dentry->d_sb),
1684 fmode, 0);
2ced46c2
TM		 1685 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1686 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1687 nfs4_init_opendata_res(opendata);
b257957e 1688 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1689 if (ret != 0)
1690 return ret;
2ced46c2 1691 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1692 if (IS_ERR(newstate))
1693 return PTR_ERR(newstate);
24311f88
TM		 1694 if (newstate != opendata->state)
1695 ret = -ESTALE;
643168c2 1696 nfs4_close_state(newstate, fmode);
24311f88 1697 return ret;
864472e9
TM		 1698}
1699
1700static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1701{
864472e9
TM		 1702 int ret;
1703
4f14c194
TM		 1704 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1705 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1706 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1707 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1708 /* memory barrier prior to reading state->n_* */
2ced46c2 1709 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1710 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1711 smp_rmb();
24311f88
TM		 1712 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1713 if (ret != 0)
1714 return ret;
1715 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1716 if (ret != 0)
1717 return ret;
1718 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1719 if (ret != 0)
1720 return ret;
1ac7e2fd
TM		 1721 /*
1722 * We may have performed cached opens for all three recoveries.
1723 * Check if we need to update the current stateid.
1724 */
1725 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1726 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1727 write_seqlock(&state->seqlock);
1ac7e2fd 1728 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1729 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1730 write_sequnlock(&state->seqlock);
1ac7e2fd 1731 }
864472e9
TM		 1732 return 0;
1733}
1734
1da177e4
LT		 1735/*
1736 * OPEN_RECLAIM:
1737 * reclaim state on the server after a reboot.
1da177e4 1738 */
539cd03a 1739static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1740{
1ac7e2fd 1741 struct nfs_delegation *delegation;
864472e9 1742 struct nfs4_opendata *opendata;
dc0b027d 1743 fmode_t delegation_type = 0;
1da177e4
LT		 1744 int status;
1745
4a1c0893
TM		 1746 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1747 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1748 if (IS_ERR(opendata))
1749 return PTR_ERR(opendata);
1ac7e2fd
TM		 1750 rcu_read_lock();
1751 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1752 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1753 delegation_type = delegation->type;
1ac7e2fd 1754 rcu_read_unlock();
864472e9
TM		 1755 opendata->o_arg.u.delegation_type = delegation_type;
1756 status = nfs4_open_recover(opendata, state);
c6d00e63 1757 nfs4_opendata_put(opendata);
1da177e4
LT		 1758 return status;
1759}
1760
539cd03a 1761static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1762{
1763 struct nfs_server *server = NFS_SERVER(state->inode);
1764 struct nfs4_exception exception = { };
1765 int err;
1766 do {
539cd03a 1767 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1768 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1769 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1770 continue;
168667c4 1771 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1772 break;
1773 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1774 } while (exception.retry);
1775 return err;
1776}
1777
864472e9
TM		 1778static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1779{
1780 struct nfs_open_context *ctx;
1781 int ret;
1782
1783 ctx = nfs4_state_find_open_context(state);
1784 if (IS_ERR(ctx))
91876b13 1785 return -EAGAIN;
539cd03a 1786 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1787 put_nfs_open_context(ctx);
1788 return ret;
1789}
1790
db4f2e63 1791static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1792{
be76b5b6
TM		 1793 switch (err) {
1794 default:
1795 printk(KERN_ERR "NFS: %s: unhandled error "
1796 "%d.\n", __func__, err);
1797 case 0:
1798 case -ENOENT:
8eee52af 1799 case -EAGAIN:
be76b5b6
TM		 1800 case -ESTALE:
1801 break;
1802 case -NFS4ERR_BADSESSION:
1803 case -NFS4ERR_BADSLOT:
1804 case -NFS4ERR_BAD_HIGH_SLOT:
1805 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1806 case -NFS4ERR_DEADSESSION:
1807 set_bit(NFS_DELEGATED_STATE, &state->flags);
1808 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1809 return -EAGAIN;
1810 case -NFS4ERR_STALE_CLIENTID:
1811 case -NFS4ERR_STALE_STATEID:
1812 set_bit(NFS_DELEGATED_STATE, &state->flags);
1813 case -NFS4ERR_EXPIRED:
1814 /* Don't recall a delegation if it was lost */
1815 nfs4_schedule_lease_recovery(server->nfs_client);
1816 return -EAGAIN;
352297b9
CL		 1817 case -NFS4ERR_MOVED:
1818 nfs4_schedule_migration_recovery(server);
1819 return -EAGAIN;
8ef2f8d4
CL		 1820 case -NFS4ERR_LEASE_MOVED:
1821 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1822 return -EAGAIN;
be76b5b6
TM		 1823 case -NFS4ERR_DELEG_REVOKED:
1824 case -NFS4ERR_ADMIN_REVOKED:
1825 case -NFS4ERR_BAD_STATEID:
db4f2e63 1826 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1827 nfs_inode_find_state_and_recover(state->inode,
1828 stateid);
1829 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1830 return -EAGAIN;
be76b5b6
TM		 1831 case -NFS4ERR_DELAY:
1832 case -NFS4ERR_GRACE:
1833 set_bit(NFS_DELEGATED_STATE, &state->flags);
1834 ssleep(1);
1835 return -EAGAIN;
db4f2e63
TM		 1836 case -ENOMEM:
1837 case -NFS4ERR_DENIED:
1838 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1839 return 0;
be76b5b6 1840 }
1da177e4
LT		 1841 return err;
1842}
1843
24311f88
TM		 1844int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1845 struct nfs4_state *state, const nfs4_stateid *stateid,
1846 fmode_t type)
db4f2e63
TM		 1847{
1848 struct nfs_server *server = NFS_SERVER(state->inode);
1849 struct nfs4_opendata *opendata;
24311f88 1850 int err = 0;
db4f2e63
TM		 1851
1852 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1853 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1854 if (IS_ERR(opendata))
1855 return PTR_ERR(opendata);
1856 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1857 write_seqlock(&state->seqlock);
1858 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1859 write_sequnlock(&state->seqlock);
24311f88
TM		 1860 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1861 switch (type & (FMODE_READ|FMODE_WRITE)) {
1862 case FMODE_READ|FMODE_WRITE:
1863 case FMODE_WRITE:
1864 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1865 if (err)
1866 break;
1867 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1868 if (err)
1869 break;
1870 case FMODE_READ:
1871 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1872 }
db4f2e63
TM		 1873 nfs4_opendata_put(opendata);
1874 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1875}
1876
be05c860
CL		 1877static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1878{
1879 struct nfs4_opendata *data = calldata;
1880
cb04ad2a
PT		 1881 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1882 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1883}
1884
cdd4e68b
TM		 1885static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1886{
1887 struct nfs4_opendata *data = calldata;
1888
17ead6c8 1889 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1890
cdd4e68b 1891 data->rpc_status = task->tk_status;
26e976a8 1892 if (data->rpc_status == 0) {
f597c537 1893 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1894 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1895 renew_lease(data->o_res.server, data->timestamp);
3e309914 1896 data->rpc_done = 1;
26e976a8 1897 }
cdd4e68b
TM		 1898}
1899
1900static void nfs4_open_confirm_release(void *calldata)
1901{
1902 struct nfs4_opendata *data = calldata;
1903 struct nfs4_state *state = NULL;
1904
1905 /* If this request hasn't been cancelled, do nothing */
1906 if (data->cancelled == 0)
1907 goto out_free;
1908 /* In case of error, no cleanup! */
3e309914 1909 if (!data->rpc_done)
cdd4e68b 1910 goto out_free;
cdd4e68b 1911 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1912 if (!IS_ERR(state))
643168c2 1913 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1914out_free:
c6d00e63 1915 nfs4_opendata_put(data);
cdd4e68b
TM		 1916}
1917
1918static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1919 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1920 .rpc_call_done = nfs4_open_confirm_done,
1921 .rpc_release = nfs4_open_confirm_release,
1922};
1923
1924/*
1925 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1926 */
1927static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1928{
2b0143b5 1929 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1930 struct rpc_task *task;
5138fde0
TM		 1931 struct rpc_message msg = {
1932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1933 .rpc_argp = &data->c_arg,
1934 .rpc_resp = &data->c_res,
1935 .rpc_cred = data->owner->so_cred,
1936 };
c970aa85
TM		 1937 struct rpc_task_setup task_setup_data = {
1938 .rpc_client = server->client,
5138fde0 1939 .rpc_message = &msg,
c970aa85
TM		 1940 .callback_ops = &nfs4_open_confirm_ops,
1941 .callback_data = data,
101070ca 1942 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1943 .flags = RPC_TASK_ASYNC,
1944 };
1da177e4
LT		 1945 int status;
1946
17ead6c8 1947 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1948 kref_get(&data->kref);
3e309914
TM		 1949 data->rpc_done = 0;
1950 data->rpc_status = 0;
5138fde0 1951 data->timestamp = jiffies;
e92c1e0d
BC		 1952 if (data->is_recover)
1953 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1954 task = rpc_run_task(&task_setup_data);
7a1218a2 1955 if (IS_ERR(task))
cdd4e68b 1956 return PTR_ERR(task);
cdd4e68b
TM		 1957 status = nfs4_wait_for_completion_rpc_task(task);
1958 if (status != 0) {
1959 data->cancelled = 1;
1960 smp_wmb();
1961 } else
1962 status = data->rpc_status;
e6b3c4db 1963 rpc_put_task(task);
1da177e4
LT		 1964 return status;
1965}
1966
24ac23ab 1967static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1968{
24ac23ab
TM		 1969 struct nfs4_opendata *data = calldata;
1970 struct nfs4_state_owner *sp = data->owner;
549b19cc 1971 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1972 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1973
24ac23ab 1974 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1975 goto out_wait;
aac00a8d
TM		 1976 /*
1977 * Check if we still need to send an OPEN call, or if we can use
1978 * a delegation instead.
1979 */
1980 if (data->state != NULL) {
1981 struct nfs_delegation *delegation;
1982
dc0b027d 1983 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1984 goto out_no_action;
aac00a8d
TM		 1985 rcu_read_lock();
1986 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1987 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1988 goto unlock_no_action;
aac00a8d
TM		 1989 rcu_read_unlock();
1990 }
95b72eb0 1991 /* Update client id. */
549b19cc 1992 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1993 switch (claim) {
1994 default:
1995 break;
8188df17
TM		 1996 case NFS4_OPEN_CLAIM_PREVIOUS:
1997 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1998 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1999 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2000 case NFS4_OPEN_CLAIM_FH:
2001 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2002 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2003 }
26e976a8 2004 data->timestamp = jiffies;
035168ab 2005 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2006 &data->o_arg.seq_args,
2240a9e2
TM		 2007 &data->o_res.seq_res,
2008 task) != 0)
2009 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2010
2011 /* Set the create mode (note dependency on the session type) */
2012 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2013 if (data->o_arg.open_flags & O_EXCL) {
2014 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2015 if (nfs4_has_persistent_session(clp))
2016 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2017 else if (clp->cl_mvops->minor_version > 0)
2018 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2019 }
6ee41268 2020 return;
652f89f6 2021unlock_no_action:
9759b0fb 2022 trace_nfs4_cached_open(data->state);
652f89f6 2023 rcu_read_unlock();
6ee41268
TM		 2024out_no_action:
2025 task->tk_action = NULL;
c8da19b9 2026out_wait:
b75ad4cd 2027 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2028}
2029
24ac23ab
TM		 2030static void nfs4_open_done(struct rpc_task *task, void *calldata)
2031{
2032 struct nfs4_opendata *data = calldata;
1da177e4 2033
24ac23ab 2034 data->rpc_status = task->tk_status;
d898528c 2035
14516c3a
TM		 2036 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2037 return;
d898528c 2038
24ac23ab 2039 if (task->tk_status == 0) {
807d66d8
TM		 2040 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2041 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2042 case S_IFREG:
2043 break;
2044 case S_IFLNK:
24ac23ab 2045 data->rpc_status = -ELOOP;
6f926b5b
TM		 2046 break;
2047 case S_IFDIR:
24ac23ab 2048 data->rpc_status = -EISDIR;
6f926b5b
TM		 2049 break;
2050 default:
24ac23ab 2051 data->rpc_status = -ENOTDIR;
807d66d8 2052 }
6f926b5b 2053 }
26e976a8 2054 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2055 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2056 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2057 }
3e309914 2058 data->rpc_done = 1;
24ac23ab 2059}
6f926b5b 2060
24ac23ab
TM		 2061static void nfs4_open_release(void *calldata)
2062{
2063 struct nfs4_opendata *data = calldata;
2064 struct nfs4_state *state = NULL;
2065
2066 /* If this request hasn't been cancelled, do nothing */
2067 if (data->cancelled == 0)
2068 goto out_free;
2069 /* In case of error, no cleanup! */
3e309914 2070 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2071 goto out_free;
2072 /* In case we need an open_confirm, no cleanup! */
2073 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2074 goto out_free;
24ac23ab 2075 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2076 if (!IS_ERR(state))
643168c2 2077 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2078out_free:
c6d00e63 2079 nfs4_opendata_put(data);
24ac23ab
TM		 2080}
2081
2082static const struct rpc_call_ops nfs4_open_ops = {
2083 .rpc_call_prepare = nfs4_open_prepare,
2084 .rpc_call_done = nfs4_open_done,
2085 .rpc_release = nfs4_open_release,
2086};
2087
b257957e 2088static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2089{
2b0143b5 2090 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2091 struct nfs_server *server = NFS_SERVER(dir);
2092 struct nfs_openargs *o_arg = &data->o_arg;
2093 struct nfs_openres *o_res = &data->o_res;
2094 struct rpc_task *task;
5138fde0
TM		 2095 struct rpc_message msg = {
2096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2097 .rpc_argp = o_arg,
2098 .rpc_resp = o_res,
2099 .rpc_cred = data->owner->so_cred,
2100 };
c970aa85
TM		 2101 struct rpc_task_setup task_setup_data = {
2102 .rpc_client = server->client,
5138fde0 2103 .rpc_message = &msg,
c970aa85
TM		 2104 .callback_ops = &nfs4_open_ops,
2105 .callback_data = data,
101070ca 2106 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2107 .flags = RPC_TASK_ASYNC,
2108 };
24ac23ab
TM		 2109 int status;
2110
a9c92d6b 2111 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2112 kref_get(&data->kref);
3e309914
TM		 2113 data->rpc_done = 0;
2114 data->rpc_status = 0;
2ced46c2 2115 data->cancelled = 0;
bdeca1b7
TM		 2116 data->is_recover = 0;
2117 if (isrecover) {
8fe72bac 2118 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2119 data->is_recover = 1;
2120 }
c970aa85 2121 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2122 if (IS_ERR(task))
2123 return PTR_ERR(task);
2124 status = nfs4_wait_for_completion_rpc_task(task);
2125 if (status != 0) {
2126 data->cancelled = 1;
2127 smp_wmb();
2128 } else
2129 status = data->rpc_status;
2130 rpc_put_task(task);
2131
2132 return status;
2133}
2134
2135static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2136{
2b0143b5 2137 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2138 struct nfs_openres *o_res = &data->o_res;
2139 int status;
2140
2141 status = nfs4_run_open_task(data, 1);
2142 if (status != 0 || !data->rpc_done)
2143 return status;
2144
6926afd1
TM		 2145 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2146
b257957e
AB		 2147 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2148 status = _nfs4_proc_open_confirm(data);
2149 if (status != 0)
2150 return status;
2151 }
2152
2153 return status;
2154}
2155
f3792d63
TM		 2156/*
2157 * Additional permission checks in order to distinguish between an
2158 * open for read, and an open for execute. This works around the
2159 * fact that NFSv4 OPEN treats read and execute permissions as being
2160 * the same.
2161 * Note that in the non-execute case, we want to turn off permission
2162 * checking if we just created a new file (POSIX open() semantics).
2163 */
6168f62c
WAA		 2164static int nfs4_opendata_access(struct rpc_cred *cred,
2165 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2166 struct nfs4_state *state, fmode_t fmode,
2167 int openflags)
6168f62c
WAA		 2168{
2169 struct nfs_access_entry cache;
2170 u32 mask;
2171
2172 /* access call failed or for some reason the server doesn't
2173 * support any access modes -- defer access call until later */
2174 if (opendata->o_res.access_supported == 0)
2175 return 0;
2176
2177 mask = 0;
f3792d63
TM		 2178 /*
2179 * Use openflags to check for exec, because fmode won't
2180 * always have FMODE_EXEC set when file open for exec.
2181 */
f8d9a897
WAA		 2182 if (openflags & __FMODE_EXEC) {
2183 /* ONLY check for exec rights */
2184 mask = MAY_EXEC;
f3792d63 2185 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2186 mask = MAY_READ;
6168f62c
WAA		 2187
2188 cache.cred = cred;
2189 cache.jiffies = jiffies;
2190 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2191 nfs_access_add_cache(state->inode, &cache);
2192
bbd3a8ee 2193 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2194 return 0;
2195
2196 /* even though OPEN succeeded, access is denied. Close the file */
2197 nfs4_close_state(state, fmode);
998f40b5 2198 return -EACCES;
6168f62c
WAA		 2199}
2200
b257957e
AB		 2201/*
2202 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2203 */
2204static int _nfs4_proc_open(struct nfs4_opendata *data)
2205{
2b0143b5 2206 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2207 struct nfs_server *server = NFS_SERVER(dir);
2208 struct nfs_openargs *o_arg = &data->o_arg;
2209 struct nfs_openres *o_res = &data->o_res;
2210 int status;
2211
2212 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2213 if (!data->rpc_done)
2214 return status;
2215 if (status != 0) {
2216 if (status == -NFS4ERR_BADNAME &&
2217 !(o_arg->open_flags & O_CREAT))
2218 return -ENOENT;
24ac23ab 2219 return status;
08ef7bd3 2220 }
24ac23ab 2221
6926afd1
TM		 2222 nfs_fattr_map_and_free_names(server, &data->f_attr);
2223
5bc2afc2 2224 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2225 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2226 if (o_arg->open_flags & O_EXCL)
2227 data->file_created = 1;
2228 else if (o_res->cinfo.before != o_res->cinfo.after)
2229 data->file_created = 1;
2230 }
0df5dd4a
TM		 2231 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2232 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2233 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2234 status = _nfs4_proc_open_confirm(data);
1da177e4 2235 if (status != 0)
24ac23ab 2236 return status;
1da177e4
LT		 2237 }
2238 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2239 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2240 return 0;
1da177e4
LT		 2241}
2242
d83217c1
AA		 2243static int nfs4_recover_expired_lease(struct nfs_server *server)
2244{
2245 return nfs4_client_recover_expired_lease(server->nfs_client);
2246}
2247
1da177e4
LT		 2248/*
2249 * OPEN_EXPIRED:
2250 * reclaim state on the server after a network partition.
2251 * Assumes caller holds the appropriate lock
2252 */
539cd03a 2253static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2254{
e56e0b78 2255 struct nfs4_opendata *opendata;
864472e9 2256 int ret;
1da177e4 2257
4a1c0893 2258 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2259 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2260 if (IS_ERR(opendata))
2261 return PTR_ERR(opendata);
864472e9 2262 ret = nfs4_open_recover(opendata, state);
35d05778 2263 if (ret == -ESTALE)
3d4ff43d 2264 d_drop(ctx->dentry);
c6d00e63 2265 nfs4_opendata_put(opendata);
864472e9 2266 return ret;
1da177e4
LT		 2267}
2268
a9ed2e25 2269static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2270{
539cd03a 2271 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2272 struct nfs4_exception exception = { };
2273 int err;
2274
2275 do {
539cd03a 2276 err = _nfs4_open_expired(ctx, state);
42113a75 2277 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2278 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2279 continue;
a9ed2e25
TM		 2280 switch (err) {
2281 default:
2282 goto out;
2283 case -NFS4ERR_GRACE:
2284 case -NFS4ERR_DELAY:
2285 nfs4_handle_exception(server, err, &exception);
2286 err = 0;
2287 }
202b50dc 2288 } while (exception.retry);
a9ed2e25 2289out:
202b50dc
TM		 2290 return err;
2291}
2292
1da177e4
LT		 2293static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2294{
1da177e4 2295 struct nfs_open_context *ctx;
864472e9 2296 int ret;
1da177e4 2297
864472e9
TM		 2298 ctx = nfs4_state_find_open_context(state);
2299 if (IS_ERR(ctx))
91876b13 2300 return -EAGAIN;
539cd03a 2301 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2302 put_nfs_open_context(ctx);
2303 return ret;
1da177e4
LT		 2304}
2305
4dfd4f7a
TM		 2306static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2307{
2308 nfs_remove_bad_delegation(state->inode);
2309 write_seqlock(&state->seqlock);
2310 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2311 write_sequnlock(&state->seqlock);
2312 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2313}
2314
2315static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2316{
2317 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2318 nfs_finish_clear_delegation_stateid(state);
2319}
2320
2321static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2322{
2323 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2324 nfs40_clear_delegation_stateid(state);
2325 return nfs4_open_expired(sp, state);
2326}
2327
f062eb6c 2328#if defined(CONFIG_NFS_V4_1)
0c116cad 2329static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2330{
f062eb6c 2331 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2332 nfs4_stateid stateid;
ab7cb0df 2333 struct nfs_delegation *delegation;
0c116cad
TM		 2334 struct rpc_cred *cred;
2335 int status;
3e60ffdd 2336
ab7cb0df
TM		 2337 /* Get the delegation credential for use by test/free_stateid */
2338 rcu_read_lock();
2339 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2340 if (delegation == NULL) {
ab7cb0df 2341 rcu_read_unlock();
0c116cad
TM		 2342 return;
2343 }
2344
2345 nfs4_stateid_copy(&stateid, &delegation->stateid);
2346 cred = get_rpccred(delegation->cred);
2347 rcu_read_unlock();
2348 status = nfs41_test_stateid(server, &stateid, cred);
2349 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2350
3e60ffdd
CL		 2351 if (status != NFS_OK) {
2352 /* Free the stateid unless the server explicitly
2353 * informs us the stateid is unrecognized. */
2354 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2355 nfs41_free_stateid(server, &stateid, cred);
2356 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2357 }
ab7cb0df 2358
0c116cad 2359 put_rpccred(cred);
3e60ffdd
CL		 2360}
2361
2362/**
2363 * nfs41_check_open_stateid - possibly free an open stateid
2364 *
2365 * @state: NFSv4 state for an inode
2366 *
2367 * Returns NFS_OK if recovery for this stateid is now finished.
2368 * Otherwise a negative NFS4ERR value is returned.
2369 */
2370static int nfs41_check_open_stateid(struct nfs4_state *state)
2371{
2372 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2373 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2374 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2375 int status;
2376
2377 /* If a state reset has been done, test_stateid is unneeded */
2378 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2379 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2380 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2381 return -NFS4ERR_BAD_STATEID;
2382
ab7cb0df 2383 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2384 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2385 if (status != NFS_OK) {
2386 /* Free the stateid unless the server explicitly
2387 * informs us the stateid is unrecognized. */
2388 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2389 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2390
2391 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2392 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2393 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2394 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2395 }
2396 return status;
2397}
2398
2399static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2400{
eb64cf96 2401 int status;
b01dd1d8 2402
0c116cad 2403 nfs41_check_delegation_stateid(state);
3e60ffdd 2404 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2405 if (status != NFS_OK)
2406 status = nfs4_open_expired(sp, state);
2407 return status;
f062eb6c
BS		 2408}
2409#endif
2410
aa53ed54
JL		 2411/*
2412 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2413 * fields corresponding to attributes that were used to store the verifier.
2414 * Make sure we clobber those fields in the later setattr call
2415 */
5334c5bd
KM		 2416static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2417 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2418{
5334c5bd
KM		 2419 const u32 *attrset = opendata->o_res.attrset;
2420
2421 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2422 !(sattr->ia_valid & ATTR_ATIME_SET))
2423 sattr->ia_valid |= ATTR_ATIME;
2424
5334c5bd 2425 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2426 !(sattr->ia_valid & ATTR_MTIME_SET))
2427 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2428
2429 /* Except MODE, it seems harmless of setting twice. */
2430 if ((attrset[1] & FATTR4_WORD1_MODE))
2431 sattr->ia_valid &= ~ATTR_MODE;
2432
2433 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2434 *label = NULL;
aa53ed54
JL		 2435}
2436
c21443c2
TM		 2437static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2438 fmode_t fmode,
2439 int flags,
3efb9722 2440 struct nfs_open_context *ctx)
c21443c2
TM		 2441{
2442 struct nfs4_state_owner *sp = opendata->owner;
2443 struct nfs_server *server = sp->so_server;
275bb307 2444 struct dentry *dentry;
c21443c2
TM		 2445 struct nfs4_state *state;
2446 unsigned int seq;
2447 int ret;
2448
2449 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2450
2451 ret = _nfs4_proc_open(opendata);
dca78001 2452 if (ret != 0)
c21443c2
TM		 2453 goto out;
2454
2455 state = nfs4_opendata_to_nfs4_state(opendata);
2456 ret = PTR_ERR(state);
2457 if (IS_ERR(state))
2458 goto out;
2459 if (server->caps & NFS_CAP_POSIX_LOCK)
2460 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2461
275bb307 2462 dentry = opendata->dentry;
2b0143b5 2463 if (d_really_is_negative(dentry)) {
275bb307
TM		 2464 /* FIXME: Is this d_drop() ever needed? */
2465 d_drop(dentry);
2466 dentry = d_add_unique(dentry, igrab(state->inode));
2467 if (dentry == NULL) {
2468 dentry = opendata->dentry;
d9dfd8d7 2469 } else {
275bb307 2470 dput(ctx->dentry);
d9dfd8d7 2471 ctx->dentry = dentry;
275bb307
TM		 2472 }
2473 nfs_set_verifier(dentry,
2b0143b5 2474 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2475 }
2476
c21443c2
TM		 2477 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2478 if (ret != 0)
2479 goto out;
2480
3efb9722 2481 ctx->state = state;
2b0143b5 2482 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2483 nfs_inode_attach_open_context(ctx);
2484 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2485 nfs4_schedule_stateid_recovery(server, state);
2486 }
c21443c2
TM		 2487out:
2488 return ret;
2489}
2490
1da177e4 2491/*
24ac23ab 2492 * Returns a referenced nfs4_state
1da177e4 2493 */
82be417a 2494static int _nfs4_do_open(struct inode *dir,
4197a055 2495 struct nfs_open_context *ctx,
82be417a
AA		 2496 int flags,
2497 struct iattr *sattr,
5bc2afc2
TM		 2498 struct nfs4_label *label,
2499 int *opened)
1da177e4
LT		 2500{
2501 struct nfs4_state_owner *sp;
2502 struct nfs4_state *state = NULL;
2503 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2504 struct nfs4_opendata *opendata;
4197a055
TM		 2505 struct dentry *dentry = ctx->dentry;
2506 struct rpc_cred *cred = ctx->cred;
2507 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2508 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2509 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2510 struct nfs4_label *olabel = NULL;
aac00a8d 2511 int status;
1da177e4
LT		 2512
2513 /* Protect against reboot recovery conflicts */
1da177e4 2514 status = -ENOMEM;
d1e284d5
TM		 2515 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2516 if (sp == NULL) {
1da177e4
LT		 2517 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2518 goto out_err;
2519 }
58d9714a
TM		 2520 status = nfs4_recover_expired_lease(server);
2521 if (status != 0)
b4454fe1 2522 goto err_put_state_owner;
2b0143b5
DH		 2523 if (d_really_is_positive(dentry))
2524 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2525 status = -ENOMEM;
2b0143b5 2526 if (d_really_is_positive(dentry))
49f9a0fa 2527 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2528 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2529 label, claim, GFP_KERNEL);
e56e0b78 2530 if (opendata == NULL)
95d35cb4 2531 goto err_put_state_owner;
1da177e4 2532
14c43f76
DQ		 2533 if (label) {
2534 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2535 if (IS_ERR(olabel)) {
2536 status = PTR_ERR(olabel);
2537 goto err_opendata_put;
2538 }
2539 }
2540
e911b815
TM		 2541 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2542 if (!opendata->f_attr.mdsthreshold) {
2543 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2544 if (!opendata->f_attr.mdsthreshold)
2545 goto err_free_label;
2546 }
1549210f 2547 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2548 }
2b0143b5
DH		 2549 if (d_really_is_positive(dentry))
2550 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2551
3efb9722 2552 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2553 if (status != 0)
14c43f76 2554 goto err_free_label;
3efb9722 2555 state = ctx->state;
6168f62c 2556
efcbc04e 2557 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2558 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2559 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2560
2561 nfs_fattr_init(opendata->o_res.f_attr);
2562 status = nfs4_do_setattr(state->inode, cred,
2563 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2564 state, label, olabel);
2565 if (status == 0) {
f044636d
TM		 2566 nfs_setattr_update_inode(state->inode, sattr,
2567 opendata->o_res.f_attr);
aa9c2669 2568 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2569 }
0ab64e0e 2570 }
c5c3fb5f 2571 if (opened && opendata->file_created)
5bc2afc2 2572 *opened |= FILE_CREATED;
82be417a 2573
e911b815 2574 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2575 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2576 opendata->f_attr.mdsthreshold = NULL;
2577 }
82be417a 2578
14c43f76
DQ		 2579 nfs4_label_free(olabel);
2580
c6d00e63 2581 nfs4_opendata_put(opendata);
1da177e4 2582 nfs4_put_state_owner(sp);
1da177e4 2583 return 0;
14c43f76
DQ		 2584err_free_label:
2585 nfs4_label_free(olabel);
c6d00e63
TM		 2586err_opendata_put:
2587 nfs4_opendata_put(opendata);
e56e0b78
TM		 2588err_put_state_owner:
2589 nfs4_put_state_owner(sp);
1da177e4 2590out_err:
1da177e4
LT		 2591 return status;
2592}
2593
2594
82be417a 2595static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2596 struct nfs_open_context *ctx,
82be417a
AA		 2597 int flags,
2598 struct iattr *sattr,
5bc2afc2
TM		 2599 struct nfs4_label *label,
2600 int *opened)
1da177e4 2601{
49f9a0fa 2602 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2603 struct nfs4_exception exception = { };
2604 struct nfs4_state *res;
2605 int status;
2606
2607 do {
5bc2afc2 2608 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2609 res = ctx->state;
42113a75 2610 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2611 if (status == 0)
2612 break;
2613 /* NOTE: BAD_SEQID means the server and client disagree about the
2614 * book-keeping w.r.t. state-changing operations
2615 * (OPEN/CLOSE/LOCK/LOCKU...)
2616 * It is actually a sign of a bug on the client or on the server.
2617 *
2618 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2619 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2620 * have unhashed the old state_owner for us, and that we can
2621 * therefore safely retry using a new one. We should still warn
2622 * the user though...
2623 */
2624 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2625 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2626 " returned a bad sequence-id error!\n",
2627 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2628 exception.retry = 1;
2629 continue;
2630 }
550f5747
TM		 2631 /*
2632 * BAD_STATEID on OPEN means that the server cancelled our
2633 * state before it received the OPEN_CONFIRM.
2634 * Recover by retrying the request as per the discussion
2635 * on Page 181 of RFC3530.
2636 */
2637 if (status == -NFS4ERR_BAD_STATEID) {
2638 exception.retry = 1;
2639 continue;
2640 }
aac00a8d
TM		 2641 if (status == -EAGAIN) {
2642 /* We must have found a delegation */
2643 exception.retry = 1;
2644 continue;
2645 }
49f9a0fa
TM		 2646 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2647 continue;
2648 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2649 status, &exception));
2650 } while (exception.retry);
2651 return res;
2652}
2653
659bfcd6
TM		 2654static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2655 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2656 struct nfs4_state *state, struct nfs4_label *ilabel,
2657 struct nfs4_label *olabel)
1da177e4 2658{
3e4f6290 2659 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2660 struct nfs_setattrargs arg = {
3e4f6290 2661 .fh = NFS_FH(inode),
1da177e4
LT		 2662 .iap = sattr,
2663 .server = server,
2664 .bitmask = server->attr_bitmask,
1775fd3e 2665 .label = ilabel,
1da177e4
LT		 2666 };
2667 struct nfs_setattrres res = {
2668 .fattr = fattr,
1775fd3e 2669 .label = olabel,
1da177e4
LT		 2670 .server = server,
2671 };
2672 struct rpc_message msg = {
659bfcd6
TM		 2673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2674 .rpc_argp = &arg,
2675 .rpc_resp = &res,
2676 .rpc_cred = cred,
1da177e4 2677 };
26e976a8 2678 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2679 fmode_t fmode;
2680 bool truncate;
65e4308d 2681 int status;
1da177e4 2682
aa9c2669
DQ		 2683 arg.bitmask = nfs4_bitmask(server, ilabel);
2684 if (ilabel)
2685 arg.bitmask = nfs4_bitmask(server, olabel);
2686
0e574af1 2687 nfs_fattr_init(fattr);
1da177e4 2688
ee3ae84e
TM		 2689 /* Servers should only apply open mode checks for file size changes */
2690 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2691 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2692
2693 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2694 /* Use that stateid */
0418dae1 2695 } else if (truncate && state != NULL) {
2a369153
TM		 2696 struct nfs_lockowner lockowner = {
2697 .l_owner = current->files,
2698 .l_pid = current->tgid,
2699 };
0418dae1
TM		 2700 if (!nfs4_valid_open_stateid(state))
2701 return -EBADF;
2702 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2703 &lockowner) == -EIO)
2704 return -EBADF;
08e9eac4 2705 } else
f597c537 2706 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2707
7c513058 2708 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2709 if (status == 0 && state != NULL)
2710 renew_lease(server, timestamp);
48c9579a 2711 trace_nfs4_setattr(inode, &arg.stateid, status);
65e4308d 2712 return status;
1da177e4
LT		 2713}
2714
659bfcd6
TM		 2715static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2716 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2717 struct nfs4_state *state, struct nfs4_label *ilabel,
2718 struct nfs4_label *olabel)
1da177e4 2719{
3e4f6290 2720 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2721 struct nfs4_exception exception = {
2722 .state = state,
3114ea7a 2723 .inode = inode,
a1d0b5ee 2724 };
1da177e4
LT		 2725 int err;
2726 do {
1775fd3e 2727 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2728 switch (err) {
2729 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2730 if (!(sattr->ia_valid & ATTR_SIZE)) {
2731 pr_warn_once("NFSv4: server %s is incorrectly "
2732 "applying open mode checks to "
2733 "a SETATTR that is not "
2734 "changing file size.\n",
2735 server->nfs_client->cl_hostname);
2736 }
451146be
TM		 2737 if (state && !(state->state & FMODE_WRITE)) {
2738 err = -EBADF;
2739 if (sattr->ia_valid & ATTR_OPEN)
2740 err = -EACCES;
2741 goto out;
2742 }
2743 }
2744 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2745 } while (exception.retry);
451146be 2746out:
1da177e4
LT		 2747 return err;
2748}
2749
500d701f
PT		 2750static bool
2751nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2752{
2753 if (inode == NULL || !nfs_have_layout(inode))
2754 return false;
2755
2756 return pnfs_wait_on_layoutreturn(inode, task);
2757}
2758
1da177e4
LT		 2759struct nfs4_closedata {
2760 struct inode *inode;
2761 struct nfs4_state *state;
2762 struct nfs_closeargs arg;
2763 struct nfs_closeres res;
516a6af6 2764 struct nfs_fattr fattr;
26e976a8 2765 unsigned long timestamp;
f7e8917a
FI		 2766 bool roc;
2767 u32 roc_barrier;
1da177e4
LT		 2768};
2769
963d8fe5 2770static void nfs4_free_closedata(void *data)
9512135d 2771{
963d8fe5
TM		 2772 struct nfs4_closedata *calldata = data;
2773 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2774 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2775
f7e8917a
FI		 2776 if (calldata->roc)
2777 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2778 nfs4_put_open_state(calldata->state);
2779 nfs_free_seqid(calldata->arg.seqid);
9512135d 2780 nfs4_put_state_owner(sp);
322b2b90 2781 nfs_sb_deactive(sb);
9512135d
TM		 2782 kfree(calldata);
2783}
2784
963d8fe5 2785static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2786{
963d8fe5 2787 struct nfs4_closedata *calldata = data;
1da177e4 2788 struct nfs4_state *state = calldata->state;
1da177e4 2789 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2790 nfs4_stateid *res_stateid = NULL;
1da177e4 2791
a3ca5651 2792 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2793 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2794 return;
42113a75 2795 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2796 /* hmm. we are done with the inode, and in the process of freeing
2797 * the state_owner. we keep this around to process errors
2798 */
1da177e4
LT		 2799 switch (task->tk_status) {
2800 case 0:
412f6c4c 2801 res_stateid = &calldata->res.stateid;
3c13cb5b 2802 if (calldata->roc)
f7e8917a
FI		 2803 pnfs_roc_set_barrier(state->inode,
2804 calldata->roc_barrier);
26e976a8 2805 renew_lease(server, calldata->timestamp);
412f6c4c 2806 break;
69794ad7 2807 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2808 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2809 case -NFS4ERR_OLD_STATEID:
2810 case -NFS4ERR_BAD_STATEID:
1da177e4 2811 case -NFS4ERR_EXPIRED:
566fcec6 2812 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2813 &state->open_stateid)) {
566fcec6
TM		 2814 rpc_restart_call_prepare(task);
2815 goto out_release;
2816 }
dc0b027d 2817 if (calldata->arg.fmode == 0)
9e33bed5 2818 break;
1da177e4 2819 default:
8478eaa1 2820 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2821 rpc_restart_call_prepare(task);
69794ad7
TM		 2822 goto out_release;
2823 }
1da177e4 2824 }
4a1e2feb
TM		 2825 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2826 res_stateid, calldata->arg.fmode);
69794ad7 2827out_release:
72211dbe 2828 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2829 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2830 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2831}
2832
4ce70ada 2833static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2834{
4ce70ada 2835 struct nfs4_closedata *calldata = data;
9512135d 2836 struct nfs4_state *state = calldata->state;
7fdab069 2837 struct inode *inode = calldata->inode;
aee7af35 2838 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2839 int call_close = 0;
9512135d 2840
a3ca5651 2841 dprintk("%s: begin!\n", __func__);
963d8fe5 2842 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2843 goto out_wait;
003707c7 2844
88069f77 2845 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2846 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2847 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2848 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2849 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2850 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2851 /* Calculate the change in open mode */
cd9288ff 2852 calldata->arg.fmode = 0;
e7616923 2853 if (state->n_rdwr == 0) {
cd9288ff
TM		 2854 if (state->n_rdonly == 0)
2855 call_close |= is_rdonly;
2856 else if (is_rdonly)
2857 calldata->arg.fmode |= FMODE_READ;
2858 if (state->n_wronly == 0)
2859 call_close |= is_wronly;
2860 else if (is_wronly)
2861 calldata->arg.fmode |= FMODE_WRITE;
2862 } else if (is_rdwr)
2863 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2864
2865 if (calldata->arg.fmode == 0)
2866 call_close |= is_rdwr;
2867
5d422301
TM		 2868 if (!nfs4_valid_open_stateid(state))
2869 call_close = 0;
4cecb76f 2870 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2871
2872 if (!call_close) {
963d8fe5 2873 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2874 goto out_no_action;
9512135d 2875 }
88069f77 2876
500d701f
PT		 2877 if (nfs4_wait_on_layoutreturn(inode, task)) {
2878 nfs_release_seqid(calldata->arg.seqid);
2879 goto out_wait;
2880 }
2881
3c13cb5b 2882 if (calldata->arg.fmode == 0)
88069f77 2883 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2884 if (calldata->roc)
2885 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2886
6ae37339
TM		 2887 calldata->arg.share_access =
2888 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2889 calldata->arg.fmode, 0);
88069f77 2890
516a6af6 2891 nfs_fattr_init(calldata->res.fattr);
26e976a8 2892 calldata->timestamp = jiffies;
7fdab069 2893 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2894 &calldata->arg.seq_args,
2895 &calldata->res.seq_res,
2240a9e2
TM		 2896 task) != 0)
2897 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2898 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2899 return;
2900out_no_action:
2901 task->tk_action = NULL;
2902out_wait:
2903 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2904}
2905
963d8fe5 2906static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2907 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2908 .rpc_call_done = nfs4_close_done,
2909 .rpc_release = nfs4_free_closedata,
2910};
2911
fe08c546
PT		 2912static bool nfs4_roc(struct inode *inode)
2913{
40dd4b7a 2914 if (!nfs_have_layout(inode))
fe08c546 2915 return false;
fe08c546
PT		 2916 return pnfs_roc(inode);
2917}
2918
1da177e4
LT		 2919/*
2920 * It is possible for data to be read/written from a mem-mapped file
2921 * after the sys_close call (which hits the vfs layer as a flush).
2922 * This means that we can't safely call nfsv4 close on a file until
2923 * the inode is cleared. This in turn means that we are not good
2924 * NFSv4 citizens - we do not indicate to the server to update the file's
2925 * share state even when we are done with one of the three share
2926 * stateid's in the inode.
2927 *
2928 * NOTE: Caller must be holding the sp->so_owner semaphore!
2929 */
1f7977c1 2930int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2931{
4a35bd41 2932 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2933 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2934 struct nfs4_closedata *calldata;
b39e625b
TM		 2935 struct nfs4_state_owner *sp = state->owner;
2936 struct rpc_task *task;
5138fde0
TM		 2937 struct rpc_message msg = {
2938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2939 .rpc_cred = state->owner->so_cred,
2940 };
c970aa85
TM		 2941 struct rpc_task_setup task_setup_data = {
2942 .rpc_client = server->client,
5138fde0 2943 .rpc_message = &msg,
c970aa85 2944 .callback_ops = &nfs4_close_ops,
101070ca 2945 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2946 .flags = RPC_TASK_ASYNC,
2947 };
9512135d 2948 int status = -ENOMEM;
1da177e4 2949
fa940720
WAA		 2950 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2951 &task_setup_data.rpc_client, &msg);
2952
8535b2be 2953 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2954 if (calldata == NULL)
9512135d 2955 goto out;
a9c92d6b 2956 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2957 calldata->inode = state->inode;
1da177e4 2958 calldata->state = state;
4a35bd41 2959 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2960 /* Serialization for the sequence id */
63f5f796
TM		 2961 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2962 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2963 if (IS_ERR(calldata->arg.seqid))
9512135d 2964 goto out_free_calldata;
dc0b027d 2965 calldata->arg.fmode = 0;
a65318bf 2966 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2967 calldata->res.fattr = &calldata->fattr;
c1d51931 2968 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2969 calldata->res.server = server;
fe08c546 2970 calldata->roc = nfs4_roc(state->inode);
643168c2 2971 nfs_sb_active(calldata->inode->i_sb);
9512135d 2972
1174dd1f
TM		 2973 msg.rpc_argp = &calldata->arg;
2974 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2975 task_setup_data.callback_data = calldata;
2976 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2977 if (IS_ERR(task))
2978 return PTR_ERR(task);
a49c3c77
TM		 2979 status = 0;
2980 if (wait)
2981 status = rpc_wait_for_completion_task(task);
b39e625b 2982 rpc_put_task(task);
a49c3c77 2983 return status;
9512135d
TM		 2984out_free_calldata:
2985 kfree(calldata);
2986out:
b39e625b
TM		 2987 nfs4_put_open_state(state);
2988 nfs4_put_state_owner(sp);
9512135d 2989 return status;
1da177e4
LT		 2990}
2991
2b484297 2992static struct inode *
5bc2afc2
TM		 2993nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2994 int open_flags, struct iattr *attr, int *opened)
1da177e4 2995{
1da177e4 2996 struct nfs4_state *state;
aa9c2669
DQ		 2997 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2998
2999 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3000
565277f6 3001 /* Protect against concurrent sillydeletes */
5bc2afc2 3002 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3003
3004 nfs4_label_release_security(label);
3005
f46e0bd3
TM		 3006 if (IS_ERR(state))
3007 return ERR_CAST(state);
275bb307 3008 return state->inode;
1da177e4
LT		 3009}
3010
1185a552 3011static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3012{
3013 if (ctx->state == NULL)
3014 return;
3015 if (is_sync)
643168c2 3016 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3017 else
643168c2 3018 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3019}
1da177e4 3020
b944dba3
TM		 3021#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3022#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3023#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3024
1da177e4
LT		 3025static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3026{
8c61282f 3027 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3028 struct nfs4_server_caps_arg args = {
3029 .fhandle = fhandle,
8c61282f 3030 .bitmask = bitmask,
43652ad5 3031 };
1da177e4
LT		 3032 struct nfs4_server_caps_res res = {};
3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3035 .rpc_argp = &args,
1da177e4
LT		 3036 .rpc_resp = &res,
3037 };
3038 int status;
3039
8c61282f
KM		 3040 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3041 FATTR4_WORD0_FH_EXPIRE_TYPE |
3042 FATTR4_WORD0_LINK_SUPPORT |
3043 FATTR4_WORD0_SYMLINK_SUPPORT |
3044 FATTR4_WORD0_ACLSUPPORT;
3045 if (minorversion)
3046 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3047
7c513058 3048 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3049 if (status == 0) {
b944dba3 3050 /* Sanity check the server answers */
8c61282f 3051 switch (minorversion) {
b944dba3
TM		 3052 case 0:
3053 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3054 res.attr_bitmask[2] = 0;
3055 break;
3056 case 1:
3057 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3058 break;
3059 case 2:
3060 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3061 }
1da177e4 3062 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3063 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3064 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3065 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3066 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3067 NFS_CAP_CTIME|NFS_CAP_MTIME|
3068 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3069 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3070 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3071 server->caps |= NFS_CAP_ACLS;
3072 if (res.has_links != 0)
3073 server->caps |= NFS_CAP_HARDLINKS;
3074 if (res.has_symlinks != 0)
3075 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3076 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3077 server->caps |= NFS_CAP_FILEID;
3078 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3079 server->caps |= NFS_CAP_MODE;
3080 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3081 server->caps |= NFS_CAP_NLINK;
3082 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3083 server->caps |= NFS_CAP_OWNER;
3084 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3085 server->caps |= NFS_CAP_OWNER_GROUP;
3086 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3087 server->caps |= NFS_CAP_ATIME;
3088 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3089 server->caps |= NFS_CAP_CTIME;
3090 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3091 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3092#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3093 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3094 server->caps |= NFS_CAP_SECURITY_LABEL;
3095#endif
3096 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3097 sizeof(server->attr_bitmask));
b944dba3 3098 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3099
a65318bf
TM		 3100 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3101 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3102 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3103 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3104 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3105 sizeof(server->exclcreat_bitmask));
1da177e4 3106 server->acl_bitmask = res.acl_bitmask;
264e6351 3107 server->fh_expire_type = res.fh_expire_type;
1da177e4 3108 }
cccef3b9 3109
1da177e4
LT		 3110 return status;
3111}
3112
55a97593 3113int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3114{
3115 struct nfs4_exception exception = { };
3116 int err;
3117 do {
3118 err = nfs4_handle_exception(server,
3119 _nfs4_server_capabilities(server, fhandle),
3120 &exception);
3121 } while (exception.retry);
3122 return err;
3123}
3124
3125static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3126 struct nfs_fsinfo *info)
3127{
aa9c2669 3128 u32 bitmask[3];
1da177e4 3129 struct nfs4_lookup_root_arg args = {
aa9c2669 3130 .bitmask = bitmask,
1da177e4
LT		 3131 };
3132 struct nfs4_lookup_res res = {
3133 .server = server,
0e574af1 3134 .fattr = info->fattr,
1da177e4
LT		 3135 .fh = fhandle,
3136 };
3137 struct rpc_message msg = {
3138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3139 .rpc_argp = &args,
3140 .rpc_resp = &res,
3141 };
008f55d0 3142
aa9c2669
DQ		 3143 bitmask[0] = nfs4_fattr_bitmap[0];
3144 bitmask[1] = nfs4_fattr_bitmap[1];
3145 /*
3146 * Process the label in the upcoming getfattr
3147 */
3148 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3149
0e574af1 3150 nfs_fattr_init(info->fattr);
7c513058 3151 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3152}
3153
3154static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3155 struct nfs_fsinfo *info)
3156{
3157 struct nfs4_exception exception = { };
3158 int err;
3159 do {
fb8a5ba8 3160 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3161 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3162 switch (err) {
3163 case 0:
3164 case -NFS4ERR_WRONGSEC:
05e9cfb4 3165 goto out;
fb8a5ba8
BS		 3166 default:
3167 err = nfs4_handle_exception(server, err, &exception);
3168 }
1da177e4 3169 } while (exception.retry);
05e9cfb4 3170out:
1da177e4
LT		 3171 return err;
3172}
3173
8f70e95f
BS		 3174static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3175 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3176{
c2190661
TM		 3177 struct rpc_auth_create_args auth_args = {
3178 .pseudoflavor = flavor,
3179 };
8f70e95f
BS		 3180 struct rpc_auth *auth;
3181 int ret;
3182
c2190661 3183 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3184 if (IS_ERR(auth)) {
75bc8821 3185 ret = -EACCES;
8f70e95f
BS		 3186 goto out;
3187 }
3188 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3189out:
3190 return ret;
3191}
3192
9a744ba3
CL		 3193/*
3194 * Retry pseudoroot lookup with various security flavors. We do this when:
3195 *
3196 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3197 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3198 *
3199 * Returns zero on success, or a negative NFS4ERR value, or a
3200 * negative errno value.
3201 */
801a16dc 3202static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3203 struct nfs_fsinfo *info)
1da177e4 3204{
9a744ba3
CL		 3205 /* Per 3530bis 15.33.5 */
3206 static const rpc_authflavor_t flav_array[] = {
3207 RPC_AUTH_GSS_KRB5P,
3208 RPC_AUTH_GSS_KRB5I,
3209 RPC_AUTH_GSS_KRB5,
c4eafe11 3210 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3211 RPC_AUTH_NULL,
3212 };
3213 int status = -EPERM;
3214 size_t i;
6a1a1e34 3215
4d4b69dd
WAA		 3216 if (server->auth_info.flavor_len > 0) {
3217 /* try each flavor specified by user */
3218 for (i = 0; i < server->auth_info.flavor_len; i++) {
3219 status = nfs4_lookup_root_sec(server, fhandle, info,
3220 server->auth_info.flavors[i]);
3221 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3222 continue;
3223 break;
3224 }
3225 } else {
3226 /* no flavors specified by user, try default list */
3227 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3228 status = nfs4_lookup_root_sec(server, fhandle, info,
3229 flav_array[i]);
3230 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3231 continue;
3232 break;
3233 }
8f70e95f 3234 }
9a744ba3 3235
fb8a5ba8
BS		 3236 /*
3237 * -EACCESS could mean that the user doesn't have correct permissions
3238 * to access the mount. It could also mean that we tried to mount
3239 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3240 * existing mount programs don't handle -EACCES very well so it should
3241 * be mapped to -EPERM instead.
3242 */
3243 if (status == -EACCES)
3244 status = -EPERM;
801a16dc
BS		 3245 return status;
3246}
3247
2ed4b95b
CL		 3248static int nfs4_do_find_root_sec(struct nfs_server *server,
3249 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3250{
3251 int mv = server->nfs_client->cl_minorversion;
3252 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3253}
3254
3255/**
3256 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3257 * @server: initialized nfs_server handle
3258 * @fhandle: we fill in the pseudo-fs root file handle
3259 * @info: we fill in an FSINFO struct
5e6b1990 3260 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3261 *
3262 * Returns zero on success, or a negative errno.
801a16dc 3263 */
3028eb2b 3264int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3265 struct nfs_fsinfo *info,
3266 bool auth_probe)
801a16dc 3267{
c7757074 3268 int status = 0;
2ed4b95b 3269
c7757074 3270 if (!auth_probe)
5e6b1990 3271 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3272
3273 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3274 status = nfs4_do_find_root_sec(server, fhandle, info);
3275
1da177e4
LT		 3276 if (status == 0)
3277 status = nfs4_server_capabilities(server, fhandle);
3278 if (status == 0)
3279 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3280
c12e87f4 3281 return nfs4_map_errors(status);
1da177e4
LT		 3282}
3283
bae36241
BS		 3284static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3285 struct nfs_fsinfo *info)
3286{
3287 int error;
3288 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3289 struct nfs4_label *label = NULL;
bae36241
BS		 3290
3291 error = nfs4_server_capabilities(server, mntfh);
3292 if (error < 0) {
3293 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3294 return error;
3295 }
3296
14c43f76
DQ		 3297 label = nfs4_label_alloc(server, GFP_KERNEL);
3298 if (IS_ERR(label))
3299 return PTR_ERR(label);
3300
1775fd3e 3301 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3302 if (error < 0) {
3303 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3304 goto err_free_label;
bae36241
BS		 3305 }
3306
3307 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3308 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3309 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3310
14c43f76
DQ		 3311err_free_label:
3312 nfs4_label_free(label);
3313
bae36241
BS		 3314 return error;
3315}
3316
6b97fd3d
MN		 3317/*
3318 * Get locations and (maybe) other attributes of a referral.
3319 * Note that we'll actually follow the referral later when
3320 * we detect fsid mismatch in inode revalidation
3321 */
f05d147f
BS		 3322static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3323 const struct qstr *name, struct nfs_fattr *fattr,
3324 struct nfs_fh *fhandle)
6b97fd3d
MN		 3325{
3326 int status = -ENOMEM;
3327 struct page *page = NULL;
3328 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3329
3330 page = alloc_page(GFP_KERNEL);
3331 if (page == NULL)
3332 goto out;
3333 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3334 if (locations == NULL)
3335 goto out;
3336
f05d147f 3337 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3338 if (status != 0)
3339 goto out;
519ae255
CL		 3340
3341 /*
3342 * If the fsid didn't change, this is a migration event, not a
3343 * referral. Cause us to drop into the exception handler, which
3344 * will kick off migration recovery.
3345 */
6b97fd3d 3346 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3347 dprintk("%s: server did not return a different fsid for"
3348 " a referral at %s\n", __func__, name->name);
519ae255 3349 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3350 goto out;
3351 }
533eb461
AA		 3352 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3353 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3354
533eb461 3355 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3356 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3357 memset(fhandle, 0, sizeof(struct nfs_fh));
3358out:
3359 if (page)
3360 __free_page(page);
5d7ca35a 3361 kfree(locations);
6b97fd3d
MN		 3362 return status;
3363}
3364
1775fd3e
DQ		 3365static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3366 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3367{
3368 struct nfs4_getattr_arg args = {
3369 .fh = fhandle,
3370 .bitmask = server->attr_bitmask,
3371 };
3372 struct nfs4_getattr_res res = {
3373 .fattr = fattr,
1775fd3e 3374 .label = label,
1da177e4
LT		 3375 .server = server,
3376 };
3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3379 .rpc_argp = &args,
3380 .rpc_resp = &res,
3381 };
aa9c2669
DQ		 3382
3383 args.bitmask = nfs4_bitmask(server, label);
3384
0e574af1 3385 nfs_fattr_init(fattr);
7c513058 3386 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3387}
3388
1775fd3e
DQ		 3389static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3390 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3391{
3392 struct nfs4_exception exception = { };
3393 int err;
3394 do {
b5f875a9
TM		 3395 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3396 trace_nfs4_getattr(server, fhandle, fattr, err);
3397 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3398 &exception);
3399 } while (exception.retry);
3400 return err;
3401}
3402
3403/*
3404 * The file is not closed if it is opened due to the a request to change
3405 * the size of the file. The open call will not be needed once the
3406 * VFS layer lookup-intents are implemented.
3407 *
3408 * Close is called when the inode is destroyed.
3409 * If we haven't opened the file for O_WRONLY, we
3410 * need to in the size_change case to obtain a stateid.
3411 *
3412 * Got race?
3413 * Because OPEN is always done by name in nfsv4, it is
3414 * possible that we opened a different file by the same
3415 * name. We can recognize this race condition, but we
3416 * can't do anything about it besides returning an error.
3417 *
3418 * This will be fixed with VFS changes (lookup-intent).
3419 */
3420static int
3421nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3422 struct iattr *sattr)
3423{
2b0143b5 3424 struct inode *inode = d_inode(dentry);
659bfcd6 3425 struct rpc_cred *cred = NULL;
d530838b 3426 struct nfs4_state *state = NULL;
14c43f76 3427 struct nfs4_label *label = NULL;
1da177e4
LT		 3428 int status;
3429
88ac815c
PT		 3430 if (pnfs_ld_layoutret_on_setattr(inode) &&
3431 sattr->ia_valid & ATTR_SIZE &&
3432 sattr->ia_size < i_size_read(inode))
24028672 3433 pnfs_commit_and_return_layout(inode);
8a1636c4 3434
0e574af1 3435 nfs_fattr_init(fattr);
1da177e4 3436
2669940d
AA		 3437 /* Deal with open(O_TRUNC) */
3438 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3439 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3440
3441 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3442 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3443 return 0;
3444
d530838b 3445 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3446 if (sattr->ia_valid & ATTR_FILE) {
3447 struct nfs_open_context *ctx;
3448
3449 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3450 if (ctx) {
3451 cred = ctx->cred;
3452 state = ctx->state;
3453 }
659bfcd6 3454 }
08e9eac4 3455
14c43f76
DQ		 3456 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3457 if (IS_ERR(label))
3458 return PTR_ERR(label);
3459
3460 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3461 if (status == 0) {
f044636d 3462 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3463 nfs_setsecurity(inode, fattr, label);
3464 }
14c43f76 3465 nfs4_label_free(label);
1da177e4
LT		 3466 return status;
3467}
3468
0c2e53f1
TM		 3469static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3470 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3471 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3472{
0c2e53f1 3473 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3474 int status;
3475 struct nfs4_lookup_arg args = {
3476 .bitmask = server->attr_bitmask,
0c2e53f1 3477 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3478 .name = name,
3479 };
3480 struct nfs4_lookup_res res = {
3481 .server = server,
3482 .fattr = fattr,
aa9c2669 3483 .label = label,
2b3de441
DH		 3484 .fh = fhandle,
3485 };
3486 struct rpc_message msg = {
3487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3488 .rpc_argp = &args,
3489 .rpc_resp = &res,
3490 };
3491
aa9c2669
DQ		 3492 args.bitmask = nfs4_bitmask(server, label);
3493
2b3de441
DH		 3494 nfs_fattr_init(fattr);
3495
1da177e4 3496 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3497 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3498 dprintk("NFS reply lookup: %d\n", status);
3499 return status;
3500}
3501
72de53ec 3502static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3503{
7ebb9315 3504 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3505 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3506 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3507 fattr->nlink = 2;
3508}
3509
72de53ec
BS		 3510static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3511 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3512 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3513{
3514 struct nfs4_exception exception = { };
72de53ec 3515 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3516 int err;
3517 do {
1775fd3e 3518 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3519 trace_nfs4_lookup(dir, name, err);
72de53ec 3520 switch (err) {
08ef7bd3 3521 case -NFS4ERR_BADNAME:
72de53ec
BS		 3522 err = -ENOENT;
3523 goto out;
0c2e53f1 3524 case -NFS4ERR_MOVED:
f05d147f 3525 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3526 if (err == -NFS4ERR_MOVED)
3527 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3528 goto out;
0c2e53f1 3529 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3530 err = -EPERM;
3531 if (client != *clnt)
3532 goto out;
66b06860 3533 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3534 if (IS_ERR(client))
3535 return PTR_ERR(client);
3536
3537 exception.retry = 1;
3538 break;
3539 default:
3540 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3541 }
1da177e4 3542 } while (exception.retry);
72de53ec
BS		 3543
3544out:
3545 if (err == 0)
3546 *clnt = client;
3547 else if (client != *clnt)
3548 rpc_shutdown_client(client);
3549
1da177e4
LT		 3550 return err;
3551}
3552
80a16b21 3553static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3554 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3555 struct nfs4_label *label)
72de53ec
BS		 3556{
3557 int status;
3558 struct rpc_clnt *client = NFS_CLIENT(dir);
3559
1775fd3e 3560 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3561 if (client != NFS_CLIENT(dir)) {
3562 rpc_shutdown_client(client);
3563 nfs_fixup_secinfo_attributes(fattr);
3564 }
3565 return status;
3566}
3567
f05d147f
BS		 3568struct rpc_clnt *
3569nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3570 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3571{
b72888cb 3572 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3573 int status;
f05d147f 3574
1775fd3e 3575 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3576 if (status < 0)
f05d147f 3577 return ERR_PTR(status);
b72888cb 3578 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3579}
3580
1da177e4
LT		 3581static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3582{
76b32999 3583 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3584 struct nfs4_accessargs args = {
3585 .fh = NFS_FH(inode),
a4980e78 3586 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3587 };
3588 struct nfs4_accessres res = {
3589 .server = server,
1da177e4 3590 };
1da177e4
LT		 3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3593 .rpc_argp = &args,
3594 .rpc_resp = &res,
3595 .rpc_cred = entry->cred,
3596 };
3597 int mode = entry->mask;
aa9c2669 3598 int status = 0;
1da177e4
LT		 3599
3600 /*
3601 * Determine which access bits we want to ask for...
3602 */
3603 if (mode & MAY_READ)
3604 args.access |= NFS4_ACCESS_READ;
3605 if (S_ISDIR(inode->i_mode)) {
3606 if (mode & MAY_WRITE)
3607 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3608 if (mode & MAY_EXEC)
3609 args.access |= NFS4_ACCESS_LOOKUP;
3610 } else {
3611 if (mode & MAY_WRITE)
3612 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3613 if (mode & MAY_EXEC)
3614 args.access |= NFS4_ACCESS_EXECUTE;
3615 }
c407d41a
TM		 3616
3617 res.fattr = nfs_alloc_fattr();
3618 if (res.fattr == NULL)
3619 return -ENOMEM;
3620
7c513058 3621 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3622 if (!status) {
6168f62c 3623 nfs_access_set_mask(entry, res.access);
c407d41a 3624 nfs_refresh_inode(inode, res.fattr);
1da177e4 3625 }
c407d41a 3626 nfs_free_fattr(res.fattr);
1da177e4
LT		 3627 return status;
3628}
3629
3630static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3631{
3632 struct nfs4_exception exception = { };
3633 int err;
3634 do {
c1578b76
TM		 3635 err = _nfs4_proc_access(inode, entry);
3636 trace_nfs4_access(inode, err);
3637 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3638 &exception);
3639 } while (exception.retry);
3640 return err;
3641}
3642
3643/*
3644 * TODO: For the time being, we don't try to get any attributes
3645 * along with any of the zero-copy operations READ, READDIR,
3646 * READLINK, WRITE.
3647 *
3648 * In the case of the first three, we want to put the GETATTR
3649 * after the read-type operation -- this is because it is hard
3650 * to predict the length of a GETATTR response in v4, and thus
3651 * align the READ data correctly. This means that the GETATTR
3652 * may end up partially falling into the page cache, and we should
3653 * shift it into the 'tail' of the xdr_buf before processing.
3654 * To do this efficiently, we need to know the total length
3655 * of data received, which doesn't seem to be available outside
3656 * of the RPC layer.
3657 *
3658 * In the case of WRITE, we also want to put the GETATTR after
3659 * the operation -- in this case because we want to make sure
140150db 3660 * we get the post-operation mtime and size.
1da177e4
LT		 3661 *
3662 * Both of these changes to the XDR layer would in fact be quite
3663 * minor, but I decided to leave them for a subsequent patch.
3664 */
3665static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3666 unsigned int pgbase, unsigned int pglen)
3667{
3668 struct nfs4_readlink args = {
3669 .fh = NFS_FH(inode),
3670 .pgbase = pgbase,
3671 .pglen = pglen,
3672 .pages = &page,
3673 };
f50c7000 3674 struct nfs4_readlink_res res;
1da177e4
LT		 3675 struct rpc_message msg = {
3676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3677 .rpc_argp = &args,
f50c7000 3678 .rpc_resp = &res,
1da177e4
LT		 3679 };
3680
7c513058 3681 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3682}
3683
3684static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3685 unsigned int pgbase, unsigned int pglen)
3686{
3687 struct nfs4_exception exception = { };
3688 int err;
3689 do {
c1578b76
TM		 3690 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3691 trace_nfs4_readlink(inode, err);
3692 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3693 &exception);
3694 } while (exception.retry);
3695 return err;
3696}
3697
1da177e4 3698/*
8867fe58 3699 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3700 */
1da177e4
LT		 3701static int
3702nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3703 int flags)
1da177e4 3704{
aa9c2669 3705 struct nfs4_label l, *ilabel = NULL;
8867fe58 3706 struct nfs_open_context *ctx;
1da177e4 3707 struct nfs4_state *state;
1da177e4
LT		 3708 int status = 0;
3709
8867fe58
MS		 3710 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3711 if (IS_ERR(ctx))
3712 return PTR_ERR(ctx);
3713
aa9c2669
DQ		 3714 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3715
a8a5da99 3716 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3717 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3718 if (IS_ERR(state)) {
3719 status = PTR_ERR(state);
c0204fd2 3720 goto out;
1da177e4 3721 }
1da177e4 3722out:
aa9c2669 3723 nfs4_label_release_security(ilabel);
8867fe58 3724 put_nfs_open_context(ctx);
1da177e4
LT		 3725 return status;
3726}
3727
3728static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3729{
16e42959 3730 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3731 struct nfs_removeargs args = {
1da177e4 3732 .fh = NFS_FH(dir),
26fe5750 3733 .name = *name,
16e42959 3734 };
4fdc17b2 3735 struct nfs_removeres res = {
16e42959 3736 .server = server,
1da177e4 3737 };
1da177e4 3738 struct rpc_message msg = {
4fdc17b2
TM		 3739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3740 .rpc_argp = &args,
3741 .rpc_resp = &res,
1da177e4 3742 };
778d2817 3743 int status;
1da177e4 3744
7c513058 3745 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3746 if (status == 0)
16e42959 3747 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3748 return status;
3749}
3750
3751static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3752{
3753 struct nfs4_exception exception = { };
3754 int err;
3755 do {
078ea3df
TM		 3756 err = _nfs4_proc_remove(dir, name);
3757 trace_nfs4_remove(dir, name, err);
3758 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3759 &exception);
3760 } while (exception.retry);
3761 return err;
3762}
3763
e4eff1a6 3764static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3765{
e4eff1a6
TM		 3766 struct nfs_server *server = NFS_SERVER(dir);
3767 struct nfs_removeargs *args = msg->rpc_argp;
3768 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3769
e4eff1a6 3770 res->server = server;
1da177e4 3771 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3772 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3773
3774 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3775}
3776
34e137cc
BS		 3777static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3778{
d9afbd1b
TM		 3779 nfs4_setup_sequence(NFS_SERVER(data->dir),
3780 &data->args.seq_args,
3781 &data->res.seq_res,
3782 task);
1da177e4
LT		 3783}
3784
e4eff1a6 3785static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3786{
078ea3df
TM		 3787 struct nfs_unlinkdata *data = task->tk_calldata;
3788 struct nfs_removeres *res = &data->res;
e4eff1a6 3789
14516c3a
TM		 3790 if (!nfs4_sequence_done(task, &res->seq_res))
3791 return 0;
8478eaa1
N		 3792 if (nfs4_async_handle_error(task, res->server, NULL,
3793 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3794 return 0;
3795 update_changeattr(dir, &res->cinfo);
e4eff1a6 3796 return 1;
1da177e4
LT		 3797}
3798
d3d4152a
JL		 3799static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3800{
3801 struct nfs_server *server = NFS_SERVER(dir);
3802 struct nfs_renameargs *arg = msg->rpc_argp;
3803 struct nfs_renameres *res = msg->rpc_resp;
3804
3805 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3806 res->server = server;
a9c92d6b 3807 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3808}
3809
c6bfa1a1
BS		 3810static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3811{
d9afbd1b
TM		 3812 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3813 &data->args.seq_args,
3814 &data->res.seq_res,
3815 task);
d3d4152a
JL		 3816}
3817
3818static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3819 struct inode *new_dir)
3820{
fbc6f7c2
TM		 3821 struct nfs_renamedata *data = task->tk_calldata;
3822 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3823
3824 if (!nfs4_sequence_done(task, &res->seq_res))
3825 return 0;
8478eaa1 3826 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3827 return 0;
3828
3829 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3830 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3831 return 1;
3832}
3833
1da177e4
LT		 3834static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3835{
91ba2eee 3836 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3837 struct nfs4_link_arg arg = {
3838 .fh = NFS_FH(inode),
3839 .dir_fh = NFS_FH(dir),
3840 .name = name,
91ba2eee
TM		 3841 .bitmask = server->attr_bitmask,
3842 };
91ba2eee
TM		 3843 struct nfs4_link_res res = {
3844 .server = server,
1775fd3e 3845 .label = NULL,
1da177e4 3846 };
1da177e4
LT		 3847 struct rpc_message msg = {
3848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3849 .rpc_argp = &arg,
91ba2eee 3850 .rpc_resp = &res,
1da177e4 3851 };
136f2627
TM		 3852 int status = -ENOMEM;
3853
3854 res.fattr = nfs_alloc_fattr();
778d2817 3855 if (res.fattr == NULL)
136f2627 3856 goto out;
1da177e4 3857
14c43f76
DQ		 3858 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3859 if (IS_ERR(res.label)) {
3860 status = PTR_ERR(res.label);
3861 goto out;
3862 }
aa9c2669 3863 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3864
7c513058 3865 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3866 if (!status) {
3867 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3868 status = nfs_post_op_update_inode(inode, res.fattr);
3869 if (!status)
3870 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3871 }
14c43f76
DQ		 3872
3873
3874 nfs4_label_free(res.label);
3875
136f2627 3876out:
136f2627 3877 nfs_free_fattr(res.fattr);
1da177e4
LT		 3878 return status;
3879}
3880
3881static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3882{
3883 struct nfs4_exception exception = { };
3884 int err;
3885 do {
3886 err = nfs4_handle_exception(NFS_SERVER(inode),
3887 _nfs4_proc_link(inode, dir, name),
3888 &exception);
3889 } while (exception.retry);
3890 return err;
3891}
3892
57dc9a57
TM		 3893struct nfs4_createdata {
3894 struct rpc_message msg;
3895 struct nfs4_create_arg arg;
3896 struct nfs4_create_res res;
3897 struct nfs_fh fh;
3898 struct nfs_fattr fattr;
1775fd3e 3899 struct nfs4_label *label;
57dc9a57
TM		 3900};
3901
3902static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3903 struct qstr *name, struct iattr *sattr, u32 ftype)
3904{
3905 struct nfs4_createdata *data;
3906
3907 data = kzalloc(sizeof(*data), GFP_KERNEL);
3908 if (data != NULL) {
3909 struct nfs_server *server = NFS_SERVER(dir);
3910
14c43f76
DQ		 3911 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3912 if (IS_ERR(data->label))
3913 goto out_free;
3914
57dc9a57
TM		 3915 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3916 data->msg.rpc_argp = &data->arg;
3917 data->msg.rpc_resp = &data->res;
3918 data->arg.dir_fh = NFS_FH(dir);
3919 data->arg.server = server;
3920 data->arg.name = name;
3921 data->arg.attrs = sattr;
3922 data->arg.ftype = ftype;
aa9c2669 3923 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3924 data->res.server = server;
3925 data->res.fh = &data->fh;
3926 data->res.fattr = &data->fattr;
1775fd3e 3927 data->res.label = data->label;
57dc9a57 3928 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3929 }
3930 return data;
14c43f76
DQ		 3931out_free:
3932 kfree(data);
3933 return NULL;
57dc9a57
TM		 3934}
3935
3936static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3937{
7c513058 3938 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3939 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3940 if (status == 0) {
3941 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3942 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3943 }
3944 return status;
3945}
3946
3947static void nfs4_free_createdata(struct nfs4_createdata *data)
3948{
14c43f76 3949 nfs4_label_free(data->label);
57dc9a57
TM		 3950 kfree(data);
3951}
3952
4f390c15 3953static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3954 struct page *page, unsigned int len, struct iattr *sattr,
3955 struct nfs4_label *label)
1da177e4 3956{
57dc9a57
TM		 3957 struct nfs4_createdata *data;
3958 int status = -ENAMETOOLONG;
1da177e4 3959
94a6d753 3960 if (len > NFS4_MAXPATHLEN)
57dc9a57 3961 goto out;
4f390c15 3962
57dc9a57
TM		 3963 status = -ENOMEM;
3964 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3965 if (data == NULL)
3966 goto out;
3967
3968 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3969 data->arg.u.symlink.pages = &page;
3970 data->arg.u.symlink.len = len;
1775fd3e 3971 data->arg.label = label;
1da177e4 3972
57dc9a57
TM		 3973 status = nfs4_do_create(dir, dentry, data);
3974
3975 nfs4_free_createdata(data);
3976out:
1da177e4
LT		 3977 return status;
3978}
3979
4f390c15 3980static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3981 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3982{
3983 struct nfs4_exception exception = { };
aa9c2669 3984 struct nfs4_label l, *label = NULL;
1da177e4 3985 int err;
aa9c2669
DQ		 3986
3987 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3988
1da177e4 3989 do {
078ea3df
TM		 3990 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3991 trace_nfs4_symlink(dir, &dentry->d_name, err);
3992 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3993 &exception);
3994 } while (exception.retry);
aa9c2669
DQ		 3995
3996 nfs4_label_release_security(label);
1da177e4
LT		 3997 return err;
3998}
3999
4000static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4001 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4002{
57dc9a57
TM		 4003 struct nfs4_createdata *data;
4004 int status = -ENOMEM;
1da177e4 4005
57dc9a57
TM		 4006 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4007 if (data == NULL)
4008 goto out;
4009
1775fd3e 4010 data->arg.label = label;
57dc9a57
TM		 4011 status = nfs4_do_create(dir, dentry, data);
4012
4013 nfs4_free_createdata(data);
4014out:
1da177e4
LT		 4015 return status;
4016}
4017
4018static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4019 struct iattr *sattr)
4020{
4021 struct nfs4_exception exception = { };
aa9c2669 4022 struct nfs4_label l, *label = NULL;
1da177e4 4023 int err;
a8a5da99 4024
aa9c2669
DQ		 4025 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4026
a8a5da99 4027 sattr->ia_mode &= ~current_umask();
1da177e4 4028 do {
078ea3df
TM		 4029 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4030 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4031 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4032 &exception);
4033 } while (exception.retry);
aa9c2669
DQ		 4034 nfs4_label_release_security(label);
4035
1da177e4
LT		 4036 return err;
4037}
4038
4039static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4040 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4041{
2b0143b5 4042 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4043 struct nfs4_readdir_arg args = {
4044 .fh = NFS_FH(dir),
56e4ebf8 4045 .pages = pages,
1da177e4
LT		 4046 .pgbase = 0,
4047 .count = count,
2b0143b5 4048 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4049 .plus = plus,
1da177e4
LT		 4050 };
4051 struct nfs4_readdir_res res;
4052 struct rpc_message msg = {
4053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4054 .rpc_argp = &args,
4055 .rpc_resp = &res,
4056 .rpc_cred = cred,
4057 };
4058 int status;
4059
6de1472f
AV		 4060 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4061 dentry,
eadf4598 4062 (unsigned long long)cookie);
c3f52af3 4063 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4064 res.pgbase = args.pgbase;
7c513058 4065 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4066 if (status >= 0) {
c3f52af3 4067 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4068 status += args.pgbase;
4069 }
c4812998
TM		 4070
4071 nfs_invalidate_atime(dir);
4072
3110ff80 4073 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4074 return status;
4075}
4076
4077static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4078 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4079{
4080 struct nfs4_exception exception = { };
4081 int err;
4082 do {
c1578b76
TM		 4083 err = _nfs4_proc_readdir(dentry, cred, cookie,
4084 pages, count, plus);
2b0143b5
DH		 4085 trace_nfs4_readdir(d_inode(dentry), err);
4086 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4087 &exception);
4088 } while (exception.retry);
4089 return err;
4090}
4091
4092static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4093 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4094{
57dc9a57
TM		 4095 struct nfs4_createdata *data;
4096 int mode = sattr->ia_mode;
4097 int status = -ENOMEM;
1da177e4 4098
57dc9a57
TM		 4099 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4100 if (data == NULL)
4101 goto out;
4102
1da177e4 4103 if (S_ISFIFO(mode))
57dc9a57 4104 data->arg.ftype = NF4FIFO;
1da177e4 4105 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4106 data->arg.ftype = NF4BLK;
4107 data->arg.u.device.specdata1 = MAJOR(rdev);
4108 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4109 }
4110 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4111 data->arg.ftype = NF4CHR;
4112 data->arg.u.device.specdata1 = MAJOR(rdev);
4113 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4114 } else if (!S_ISSOCK(mode)) {
4115 status = -EINVAL;
4116 goto out_free;
1da177e4 4117 }
1775fd3e 4118
aa9c2669 4119 data->arg.label = label;
57dc9a57 4120 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4121out_free:
57dc9a57
TM		 4122 nfs4_free_createdata(data);
4123out:
1da177e4
LT		 4124 return status;
4125}
4126
4127static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4128 struct iattr *sattr, dev_t rdev)
4129{
4130 struct nfs4_exception exception = { };
aa9c2669 4131 struct nfs4_label l, *label = NULL;
1da177e4 4132 int err;
a8a5da99 4133
aa9c2669
DQ		 4134 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4135
a8a5da99 4136 sattr->ia_mode &= ~current_umask();
1da177e4 4137 do {
078ea3df
TM		 4138 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4139 trace_nfs4_mknod(dir, &dentry->d_name, err);
4140 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4141 &exception);
4142 } while (exception.retry);
aa9c2669
DQ		 4143
4144 nfs4_label_release_security(label);
4145
1da177e4
LT		 4146 return err;
4147}
4148
4149static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4150 struct nfs_fsstat *fsstat)
4151{
4152 struct nfs4_statfs_arg args = {
4153 .fh = fhandle,
4154 .bitmask = server->attr_bitmask,
4155 };
24ad148a
BH		 4156 struct nfs4_statfs_res res = {
4157 .fsstat = fsstat,
4158 };
1da177e4
LT		 4159 struct rpc_message msg = {
4160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4161 .rpc_argp = &args,
24ad148a 4162 .rpc_resp = &res,
1da177e4
LT		 4163 };
4164
0e574af1 4165 nfs_fattr_init(fsstat->fattr);
7c513058 4166 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4167}
4168
4169static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4170{
4171 struct nfs4_exception exception = { };
4172 int err;
4173 do {
4174 err = nfs4_handle_exception(server,
4175 _nfs4_proc_statfs(server, fhandle, fsstat),
4176 &exception);
4177 } while (exception.retry);
4178 return err;
4179}
4180
4181static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4182 struct nfs_fsinfo *fsinfo)
4183{
4184 struct nfs4_fsinfo_arg args = {
4185 .fh = fhandle,
4186 .bitmask = server->attr_bitmask,
4187 };
3dda5e43
BH		 4188 struct nfs4_fsinfo_res res = {
4189 .fsinfo = fsinfo,
4190 };
1da177e4
LT		 4191 struct rpc_message msg = {
4192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4193 .rpc_argp = &args,
3dda5e43 4194 .rpc_resp = &res,
1da177e4
LT		 4195 };
4196
7c513058 4197 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4198}
4199
4200static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4201{
4202 struct nfs4_exception exception = { };
83ca7f5a 4203 unsigned long now = jiffies;
1da177e4
LT		 4204 int err;
4205
4206 do {
83ca7f5a 4207 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4208 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4209 if (err == 0) {
4210 struct nfs_client *clp = server->nfs_client;
4211
4212 spin_lock(&clp->cl_lock);
4213 clp->cl_lease_time = fsinfo->lease_time * HZ;
4214 clp->cl_last_renewal = now;
4215 spin_unlock(&clp->cl_lock);
4216 break;
4217 }
4218 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4219 } while (exception.retry);
4220 return err;
4221}
4222
4223static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4224{
e38eb650
BS		 4225 int error;
4226
0e574af1 4227 nfs_fattr_init(fsinfo->fattr);
e38eb650 4228 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4229 if (error == 0) {
4230 /* block layout checks this! */
4231 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4232 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4233 }
e38eb650
BS		 4234
4235 return error;
1da177e4
LT		 4236}
4237
4238static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4239 struct nfs_pathconf *pathconf)
4240{
4241 struct nfs4_pathconf_arg args = {
4242 .fh = fhandle,
4243 .bitmask = server->attr_bitmask,
4244 };
d45b2989
BH		 4245 struct nfs4_pathconf_res res = {
4246 .pathconf = pathconf,
4247 };
1da177e4
LT		 4248 struct rpc_message msg = {
4249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4250 .rpc_argp = &args,
d45b2989 4251 .rpc_resp = &res,
1da177e4
LT		 4252 };
4253
4254 /* None of the pathconf attributes are mandatory to implement */
4255 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4256 memset(pathconf, 0, sizeof(*pathconf));
4257 return 0;
4258 }
4259
0e574af1 4260 nfs_fattr_init(pathconf->fattr);
7c513058 4261 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4262}
4263
4264static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4265 struct nfs_pathconf *pathconf)
4266{
4267 struct nfs4_exception exception = { };
4268 int err;
4269
4270 do {
4271 err = nfs4_handle_exception(server,
4272 _nfs4_proc_pathconf(server, fhandle, pathconf),
4273 &exception);
4274 } while (exception.retry);
4275 return err;
4276}
4277
5521abfd 4278int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4279 const struct nfs_open_context *ctx,
4280 const struct nfs_lock_context *l_ctx,
4281 fmode_t fmode)
4282{
4283 const struct nfs_lockowner *lockowner = NULL;
4284
4285 if (l_ctx != NULL)
4286 lockowner = &l_ctx->lockowner;
5521abfd 4287 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4288}
4289EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4290
5521abfd
TM		 4291static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4292 const struct nfs_open_context *ctx,
4293 const struct nfs_lock_context *l_ctx,
4294 fmode_t fmode)
4295{
4296 nfs4_stateid current_stateid;
4297
e1253be0
TM		 4298 /* If the current stateid represents a lost lock, then exit */
4299 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4300 return true;
5521abfd
TM		 4301 return nfs4_stateid_match(stateid, &current_stateid);
4302}
4303
4304static bool nfs4_error_stateid_expired(int err)
4305{
4306 switch (err) {
4307 case -NFS4ERR_DELEG_REVOKED:
4308 case -NFS4ERR_ADMIN_REVOKED:
4309 case -NFS4ERR_BAD_STATEID:
4310 case -NFS4ERR_STALE_STATEID:
4311 case -NFS4ERR_OLD_STATEID:
4312 case -NFS4ERR_OPENMODE:
4313 case -NFS4ERR_EXPIRED:
4314 return true;
4315 }
4316 return false;
4317}
4318
d45f60c6 4319void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4320{
d45f60c6 4321 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4322}
4323
d45f60c6 4324static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4325{
d45f60c6 4326 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4327
d45f60c6
WAA		 4328 trace_nfs4_read(hdr, task->tk_status);
4329 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4330 hdr->args.context->state,
4331 NULL) == -EAGAIN) {
d00c5d43 4332 rpc_restart_call_prepare(task);
ec06c096 4333 return -EAGAIN;
1da177e4 4334 }
8850df99 4335
d45f60c6 4336 __nfs4_read_done_cb(hdr);
1da177e4 4337 if (task->tk_status > 0)
d45f60c6 4338 renew_lease(server, hdr->timestamp);
ec06c096 4339 return 0;
1da177e4
LT		 4340}
4341
5521abfd 4342static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4343 struct nfs_pgio_args *args)
5521abfd
TM		 4344{
4345
4346 if (!nfs4_error_stateid_expired(task->tk_status) ||
4347 nfs4_stateid_is_current(&args->stateid,
4348 args->context,
4349 args->lock_context,
4350 FMODE_READ))
4351 return false;
4352 rpc_restart_call_prepare(task);
4353 return true;
4354}
4355
d45f60c6 4356static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4357{
4358
4359 dprintk("--> %s\n", __func__);
4360
d45f60c6 4361 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4362 return -EAGAIN;
d45f60c6 4363 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4364 return -EAGAIN;
d45f60c6
WAA		 4365 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4366 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4367}
4368
d45f60c6
WAA		 4369static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4370 struct rpc_message *msg)
1da177e4 4371{
d45f60c6
WAA		 4372 hdr->timestamp = jiffies;
4373 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4374 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4375 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4376}
4377
d45f60c6
WAA		 4378static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4379 struct nfs_pgio_header *hdr)
ea7c3303 4380{
d45f60c6
WAA		 4381 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4382 &hdr->args.seq_args,
4383 &hdr->res.seq_res,
9b206149 4384 task))
ef1820f9 4385 return 0;
d45f60c6
WAA		 4386 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4387 hdr->args.lock_context,
4388 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4389 return -EIO;
d45f60c6 4390 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4391 return -EIO;
4392 return 0;
1da177e4
LT		 4393}
4394
d45f60c6
WAA		 4395static int nfs4_write_done_cb(struct rpc_task *task,
4396 struct nfs_pgio_header *hdr)
1da177e4 4397{
d45f60c6 4398 struct inode *inode = hdr->inode;
8478eaa1 4399
d45f60c6
WAA		 4400 trace_nfs4_write(hdr, task->tk_status);
4401 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4402 hdr->args.context->state,
4403 NULL) == -EAGAIN) {
d00c5d43 4404 rpc_restart_call_prepare(task);
788e7a89 4405 return -EAGAIN;
1da177e4 4406 }
4f9838c7 4407 if (task->tk_status >= 0) {
d45f60c6 4408 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4409 nfs_writeback_update_inode(hdr);
4f9838c7 4410 }
788e7a89 4411 return 0;
1da177e4
LT		 4412}
4413
5521abfd 4414static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4415 struct nfs_pgio_args *args)
5521abfd
TM		 4416{
4417
4418 if (!nfs4_error_stateid_expired(task->tk_status) ||
4419 nfs4_stateid_is_current(&args->stateid,
4420 args->context,
4421 args->lock_context,
4422 FMODE_WRITE))
4423 return false;
4424 rpc_restart_call_prepare(task);
4425 return true;
4426}
4427
d45f60c6 4428static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4429{
d45f60c6 4430 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4431 return -EAGAIN;
d45f60c6 4432 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4433 return -EAGAIN;
d45f60c6
WAA		 4434 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4435 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4436}
4437
5a37f851 4438static
d45f60c6 4439bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4440{
5a37f851 4441 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4442 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4443 return false;
4444 /* Otherwise, request attributes if and only if we don't hold
4445 * a delegation
4446 */
011e2a7f 4447 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4448}
a69aef14 4449
d45f60c6
WAA		 4450static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4451 struct rpc_message *msg)
1da177e4 4452{
d45f60c6 4453 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4454
d45f60c6
WAA		 4455 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4456 hdr->args.bitmask = NULL;
4457 hdr->res.fattr = NULL;
7ffd1064 4458 } else
d45f60c6 4459 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4460
d45f60c6
WAA		 4461 if (!hdr->pgio_done_cb)
4462 hdr->pgio_done_cb = nfs4_write_done_cb;
4463 hdr->res.server = server;
4464 hdr->timestamp = jiffies;
1da177e4 4465
bdc7f021 4466 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4467 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4468}
4469
0b7c0153 4470static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4471{
d9afbd1b
TM		 4472 nfs4_setup_sequence(NFS_SERVER(data->inode),
4473 &data->args.seq_args,
4474 &data->res.seq_res,
4475 task);
1da177e4
LT		 4476}
4477
0b7c0153 4478static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4479{
1da177e4 4480 struct inode *inode = data->inode;
14516c3a 4481
cc668ab3 4482 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4483 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4484 NULL, NULL) == -EAGAIN) {
d00c5d43 4485 rpc_restart_call_prepare(task);
788e7a89 4486 return -EAGAIN;
1da177e4 4487 }
788e7a89 4488 return 0;
1da177e4
LT		 4489}
4490
0b7c0153 4491static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4492{
4493 if (!nfs4_sequence_done(task, &data->res.seq_res))
4494 return -EAGAIN;
0b7c0153 4495 return data->commit_done_cb(task, data);
5f452431
FI		 4496}
4497
0b7c0153 4498static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4499{
788e7a89 4500 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4501
0b7c0153
FI		 4502 if (data->commit_done_cb == NULL)
4503 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4504 data->res.server = server;
bdc7f021 4505 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4506 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4507}
4508
9bc4e3ca
CL		 4509struct nfs4_renewdata {
4510 struct nfs_client *client;
4511 unsigned long timestamp;
4512};
4513
1da177e4
LT		 4514/*
4515 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4516 * standalone procedure for queueing an asynchronous RENEW.
4517 */
9bc4e3ca 4518static void nfs4_renew_release(void *calldata)
dc96aef9 4519{
9bc4e3ca
CL		 4520 struct nfs4_renewdata *data = calldata;
4521 struct nfs_client *clp = data->client;
dc96aef9 4522
0851de06
AB		 4523 if (atomic_read(&clp->cl_count) > 1)
4524 nfs4_schedule_state_renewal(clp);
4525 nfs_put_client(clp);
9bc4e3ca 4526 kfree(data);
dc96aef9
AB		 4527}
4528
9bc4e3ca 4529static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4530{
9bc4e3ca
CL		 4531 struct nfs4_renewdata *data = calldata;
4532 struct nfs_client *clp = data->client;
4533 unsigned long timestamp = data->timestamp;
1da177e4 4534
c6d01c6f 4535 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4536 switch (task->tk_status) {
4537 case 0:
4538 break;
4539 case -NFS4ERR_LEASE_MOVED:
4540 nfs4_schedule_lease_moved_recovery(clp);
4541 break;
4542 default:
95baa25c 4543 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4544 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4545 return;
4546 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4547 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4548 return;
4549 }
4550 nfs4_schedule_path_down_recovery(clp);
1da177e4 4551 }
452e9352 4552 do_renew_lease(clp, timestamp);
1da177e4
LT		 4553}
4554
963d8fe5
TM		 4555static const struct rpc_call_ops nfs4_renew_ops = {
4556 .rpc_call_done = nfs4_renew_done,
dc96aef9 4557 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4558};
4559
2f60ea6b 4560static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4561{
4562 struct rpc_message msg = {
4563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4564 .rpc_argp = clp,
b4454fe1 4565 .rpc_cred = cred,
1da177e4 4566 };
9bc4e3ca 4567 struct nfs4_renewdata *data;
1da177e4 4568
2f60ea6b
TM		 4569 if (renew_flags == 0)
4570 return 0;
0851de06
AB		 4571 if (!atomic_inc_not_zero(&clp->cl_count))
4572 return -EIO;
b569ad34 4573 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4574 if (data == NULL)
4575 return -ENOMEM;
4576 data->client = clp;
4577 data->timestamp = jiffies;
bc7a05ca 4578 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4579 &nfs4_renew_ops, data);
1da177e4
LT		 4580}
4581
8534d4ec 4582static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4583{
4584 struct rpc_message msg = {
4585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4586 .rpc_argp = clp,
b4454fe1 4587 .rpc_cred = cred,
1da177e4
LT		 4588 };
4589 unsigned long now = jiffies;
4590 int status;
4591
bc7a05ca 4592 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4593 if (status < 0)
4594 return status;
452e9352 4595 do_renew_lease(clp, now);
1da177e4
LT		 4596 return 0;
4597}
4598
aa1870af
BF		 4599static inline int nfs4_server_supports_acls(struct nfs_server *server)
4600{
7dd7d959 4601 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4602}
4603
21f498c2
TM		 4604/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4605 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4606 * the stack.
4607 */
21f498c2 4608#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4609
e9e3d724 4610static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4611 struct page **pages)
e9e3d724
NH		 4612{
4613 struct page *newpage, **spages;
4614 int rc = 0;
4615 size_t len;
4616 spages = pages;
4617
4618 do {
21f498c2 4619 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4620 newpage = alloc_page(GFP_KERNEL);
4621
4622 if (newpage == NULL)
4623 goto unwind;
4624 memcpy(page_address(newpage), buf, len);
4625 buf += len;
4626 buflen -= len;
4627 *pages++ = newpage;
4628 rc++;
4629 } while (buflen != 0);
4630
4631 return rc;
4632
4633unwind:
4634 for(; rc > 0; rc--)
4635 __free_page(spages[rc-1]);
4636 return -ENOMEM;
4637}
4638
e50a1c2e
BF		 4639struct nfs4_cached_acl {
4640 int cached;
4641 size_t len;
3e9d4154 4642 char data[0];
e50a1c2e
BF		 4643};
4644
4645static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4646{
4647 struct nfs_inode *nfsi = NFS_I(inode);
4648
4649 spin_lock(&inode->i_lock);
4650 kfree(nfsi->nfs4_acl);
4651 nfsi->nfs4_acl = acl;
4652 spin_unlock(&inode->i_lock);
4653}
4654
4655static void nfs4_zap_acl_attr(struct inode *inode)
4656{
4657 nfs4_set_cached_acl(inode, NULL);
4658}
4659
4660static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4661{
4662 struct nfs_inode *nfsi = NFS_I(inode);
4663 struct nfs4_cached_acl *acl;
4664 int ret = -ENOENT;
4665
4666 spin_lock(&inode->i_lock);
4667 acl = nfsi->nfs4_acl;
4668 if (acl == NULL)
4669 goto out;
4670 if (buf == NULL) /* user is just asking for length */
4671 goto out_len;
4672 if (acl->cached == 0)
4673 goto out;
4674 ret = -ERANGE; /* see getxattr(2) man page */
4675 if (acl->len > buflen)
4676 goto out;
4677 memcpy(buf, acl->data, acl->len);
4678out_len:
4679 ret = acl->len;
4680out:
4681 spin_unlock(&inode->i_lock);
4682 return ret;
4683}
4684
5794d21e 4685static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4686{
4687 struct nfs4_cached_acl *acl;
b291f1b1 4688 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4689
1f1ea6c2 4690 if (buflen <= PAGE_SIZE) {
b291f1b1 4691 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4692 if (acl == NULL)
4693 goto out;
4694 acl->cached = 1;
5794d21e 4695 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4696 } else {
4697 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4698 if (acl == NULL)
4699 goto out;
4700 acl->cached = 0;
4701 }
4702 acl->len = acl_len;
4703out:
4704 nfs4_set_cached_acl(inode, acl);
4705}
4706
bf118a34
AA		 4707/*
4708 * The getxattr API returns the required buffer length when called with a
4709 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4710 * the required buf. On a NULL buf, we send a page of data to the server
4711 * guessing that the ACL request can be serviced by a page. If so, we cache
4712 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4713 * the cache. If not so, we throw away the page, and cache the required
4714 * length. The next getxattr call will then produce another round trip to
4715 * the server, this time with the input buf of the required size.
4716 */
16b4289c 4717static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4718{
bf118a34 4719 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4720 struct nfs_getaclargs args = {
4721 .fh = NFS_FH(inode),
4722 .acl_pages = pages,
4723 .acl_len = buflen,
4724 };
663c79b3
BH		 4725 struct nfs_getaclres res = {
4726 .acl_len = buflen,
4727 };
aa1870af
BF		 4728 struct rpc_message msg = {
4729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4730 .rpc_argp = &args,
663c79b3 4731 .rpc_resp = &res,
aa1870af 4732 };
21f498c2
TM		 4733 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4734 int ret = -ENOMEM, i;
aa1870af 4735
bf118a34
AA		 4736 /* As long as we're doing a round trip to the server anyway,
4737 * let's be prepared for a page of acl data. */
4738 if (npages == 0)
4739 npages = 1;
21f498c2
TM		 4740 if (npages > ARRAY_SIZE(pages))
4741 return -ERANGE;
5a006899 4742
bf118a34
AA		 4743 for (i = 0; i < npages; i++) {
4744 pages[i] = alloc_page(GFP_KERNEL);
4745 if (!pages[i])
4746 goto out_free;
e50a1c2e 4747 }
5a006899
SP		 4748
4749 /* for decoding across pages */
4750 res.acl_scratch = alloc_page(GFP_KERNEL);
4751 if (!res.acl_scratch)
4752 goto out_free;
4753
bf118a34 4754 args.acl_len = npages * PAGE_SIZE;
5a006899 4755
de040bec 4756 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4757 __func__, buf, buflen, npages, args.acl_len);
4758 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4759 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4760 if (ret)
4761 goto out_free;
bf118a34 4762
1f1ea6c2
TM		 4763 /* Handle the case where the passed-in buffer is too short */
4764 if (res.acl_flags & NFS4_ACL_TRUNC) {
4765 /* Did the user only issue a request for the acl length? */
4766 if (buf == NULL)
4767 goto out_ok;
e50a1c2e 4768 ret = -ERANGE;
1f1ea6c2 4769 goto out_free;
e50a1c2e 4770 }
1f1ea6c2 4771 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4772 if (buf) {
4773 if (res.acl_len > buflen) {
4774 ret = -ERANGE;
4775 goto out_free;
4776 }
1f1ea6c2 4777 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4778 }
1f1ea6c2
TM		 4779out_ok:
4780 ret = res.acl_len;
e50a1c2e 4781out_free:
bf118a34
AA		 4782 for (i = 0; i < npages; i++)
4783 if (pages[i])
4784 __free_page(pages[i]);
331818f1
TM		 4785 if (res.acl_scratch)
4786 __free_page(res.acl_scratch);
aa1870af
BF		 4787 return ret;
4788}
4789
16b4289c
TM		 4790static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4791{
4792 struct nfs4_exception exception = { };
4793 ssize_t ret;
4794 do {
4795 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4796 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4797 if (ret >= 0)
4798 break;
4799 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4800 } while (exception.retry);
4801 return ret;
4802}
4803
e50a1c2e
BF		 4804static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4805{
4806 struct nfs_server *server = NFS_SERVER(inode);
4807 int ret;
4808
4809 if (!nfs4_server_supports_acls(server))
4810 return -EOPNOTSUPP;
4811 ret = nfs_revalidate_inode(server, inode);
4812 if (ret < 0)
4813 return ret;
08a22b39
AK		 4814 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4815 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4816 ret = nfs4_read_cached_acl(inode, buf, buflen);
4817 if (ret != -ENOENT)
bf118a34
AA		 4818 /* -ENOENT is returned if there is no ACL or if there is an ACL
4819 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4820 return ret;
4821 return nfs4_get_acl_uncached(inode, buf, buflen);
4822}
4823
16b4289c 4824static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4825{
4826 struct nfs_server *server = NFS_SERVER(inode);
4827 struct page *pages[NFS4ACL_MAXPAGES];
4828 struct nfs_setaclargs arg = {
4829 .fh = NFS_FH(inode),
4830 .acl_pages = pages,
4831 .acl_len = buflen,
4832 };
73c403a9 4833 struct nfs_setaclres res;
4b580ee3
BF		 4834 struct rpc_message msg = {
4835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4836 .rpc_argp = &arg,
73c403a9 4837 .rpc_resp = &res,
4b580ee3 4838 };
21f498c2 4839 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4840 int ret, i;
4b580ee3
BF		 4841
4842 if (!nfs4_server_supports_acls(server))
4843 return -EOPNOTSUPP;
21f498c2
TM		 4844 if (npages > ARRAY_SIZE(pages))
4845 return -ERANGE;
8fbcf237 4846 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4847 if (i < 0)
4848 return i;
57ec14c5 4849 nfs4_inode_return_delegation(inode);
7c513058 4850 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4851
4852 /*
4853 * Free each page after tx, so the only ref left is
4854 * held by the network stack
4855 */
4856 for (; i > 0; i--)
4857 put_page(pages[i-1]);
4858
08a22b39
AK		 4859 /*
4860 * Acl update can result in inode attribute update.
4861 * so mark the attribute cache invalid.
4862 */
4863 spin_lock(&inode->i_lock);
4864 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4865 spin_unlock(&inode->i_lock);
f41f7418
TM		 4866 nfs_access_zap_cache(inode);
4867 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4868 return ret;
4869}
4870
16b4289c
TM		 4871static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4872{
4873 struct nfs4_exception exception = { };
4874 int err;
4875 do {
c1578b76
TM		 4876 err = __nfs4_proc_set_acl(inode, buf, buflen);
4877 trace_nfs4_set_acl(inode, err);
4878 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4879 &exception);
4880 } while (exception.retry);
4881 return err;
4882}
4883
aa9c2669
DQ		 4884#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4885static int _nfs4_get_security_label(struct inode *inode, void *buf,
4886 size_t buflen)
4887{
4888 struct nfs_server *server = NFS_SERVER(inode);
4889 struct nfs_fattr fattr;
4890 struct nfs4_label label = {0, 0, buflen, buf};
4891
4892 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4893 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4894 .fh = NFS_FH(inode),
4895 .bitmask = bitmask,
4896 };
4897 struct nfs4_getattr_res res = {
4898 .fattr = &fattr,
4899 .label = &label,
4900 .server = server,
4901 };
4902 struct rpc_message msg = {
4903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4904 .rpc_argp = &arg,
aa9c2669
DQ		 4905 .rpc_resp = &res,
4906 };
4907 int ret;
4908
4909 nfs_fattr_init(&fattr);
4910
fcb63a9b 4911 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4912 if (ret)
4913 return ret;
4914 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4915 return -ENOENT;
4916 if (buflen < label.len)
4917 return -ERANGE;
4918 return 0;
4919}
4920
4921static int nfs4_get_security_label(struct inode *inode, void *buf,
4922 size_t buflen)
4923{
4924 struct nfs4_exception exception = { };
4925 int err;
4926
4927 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4928 return -EOPNOTSUPP;
4929
4930 do {
c1578b76
TM		 4931 err = _nfs4_get_security_label(inode, buf, buflen);
4932 trace_nfs4_get_security_label(inode, err);
4933 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4934 &exception);
4935 } while (exception.retry);
4936 return err;
4937}
4938
4939static int _nfs4_do_set_security_label(struct inode *inode,
4940 struct nfs4_label *ilabel,
4941 struct nfs_fattr *fattr,
4942 struct nfs4_label *olabel)
4943{
4944
4945 struct iattr sattr = {0};
4946 struct nfs_server *server = NFS_SERVER(inode);
4947 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4948 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4949 .fh = NFS_FH(inode),
4950 .iap = &sattr,
4951 .server = server,
4952 .bitmask = bitmask,
4953 .label = ilabel,
4954 };
4955 struct nfs_setattrres res = {
4956 .fattr = fattr,
4957 .label = olabel,
4958 .server = server,
4959 };
4960 struct rpc_message msg = {
4961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4962 .rpc_argp = &arg,
aa9c2669
DQ		 4963 .rpc_resp = &res,
4964 };
4965 int status;
4966
12207f69 4967 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4968
12207f69 4969 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4970 if (status)
4971 dprintk("%s failed: %d\n", __func__, status);
4972
4973 return status;
4974}
4975
4976static int nfs4_do_set_security_label(struct inode *inode,
4977 struct nfs4_label *ilabel,
4978 struct nfs_fattr *fattr,
4979 struct nfs4_label *olabel)
4980{
4981 struct nfs4_exception exception = { };
4982 int err;
4983
4984 do {
c1578b76
TM		 4985 err = _nfs4_do_set_security_label(inode, ilabel,
4986 fattr, olabel);
4987 trace_nfs4_set_security_label(inode, err);
4988 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4989 &exception);
4990 } while (exception.retry);
4991 return err;
4992}
4993
4994static int
4995nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4996{
4997 struct nfs4_label ilabel, *olabel = NULL;
4998 struct nfs_fattr fattr;
4999 struct rpc_cred *cred;
2b0143b5 5000 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 5001 int status;
5002
5003 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5004 return -EOPNOTSUPP;
5005
5006 nfs_fattr_init(&fattr);
5007
5008 ilabel.pi = 0;
5009 ilabel.lfs = 0;
5010 ilabel.label = (char *)buf;
5011 ilabel.len = buflen;
5012
5013 cred = rpc_lookup_cred();
5014 if (IS_ERR(cred))
5015 return PTR_ERR(cred);
5016
5017 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5018 if (IS_ERR(olabel)) {
5019 status = -PTR_ERR(olabel);
5020 goto out;
5021 }
5022
5023 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5024 if (status == 0)
5025 nfs_setsecurity(inode, &fattr, olabel);
5026
5027 nfs4_label_free(olabel);
5028out:
5029 put_rpccred(cred);
5030 return status;
5031}
5032#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5033
5034
f092075d
CL		 5035static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5036 nfs4_verifier *bootverf)
cd93710e
CL		 5037{
5038 __be32 verf[2];
5039
2c820d9a
CL		 5040 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5041 /* An impossible timestamp guarantees this value
5042 * will never match a generated boot time. */
5043 verf[0] = 0;
17f26b12 5044 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5045 } else {
f092075d 5046 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5047 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5048 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5049 }
cd93710e
CL		 5050 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5051}
5052
a3192688
JL		 5053static int
5054nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5055{
a3192688
JL		 5056 size_t len;
5057 char *str;
e984a55a 5058
ceb3a16c 5059 if (clp->cl_owner_id != NULL)
a3192688 5060 return 0;
4a3e5779 5061
a3192688 5062 rcu_read_lock();
4a70316c 5063 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5064 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5065 1 +
5066 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5067 1;
5068 rcu_read_unlock();
5069
5070 if (len > NFS4_OPAQUE_LIMIT + 1)
5071 return -EINVAL;
5072
5073 /*
5074 * Since this string is allocated at mount time, and held until the
5075 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5076 * about a memory-reclaim deadlock.
5077 */
5078 str = kmalloc(len, GFP_KERNEL);
5079 if (!str)
5080 return -ENOMEM;
ceb3a16c 5081
e984a55a 5082 rcu_read_lock();
f2dd436e 5083 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5084 clp->cl_ipaddr,
5085 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5086 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5087 rcu_read_unlock();
a3192688 5088
a3192688
JL		 5089 clp->cl_owner_id = str;
5090 return 0;
e984a55a
CL		 5091}
5092
873e3851
JL		 5093static int
5094nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5095{
873e3851
JL		 5096 size_t len;
5097 char *str;
5098
5099 len = 10 + 10 + 1 + 10 + 1 +
5100 strlen(nfs4_client_id_uniquifier) + 1 +
5101 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5102
5103 if (len > NFS4_OPAQUE_LIMIT + 1)
5104 return -EINVAL;
5105
5106 /*
5107 * Since this string is allocated at mount time, and held until the
5108 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5109 * about a memory-reclaim deadlock.
5110 */
5111 str = kmalloc(len, GFP_KERNEL);
5112 if (!str)
5113 return -ENOMEM;
5114
f2dd436e 5115 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5116 clp->rpc_ops->version, clp->cl_minorversion,
5117 nfs4_client_id_uniquifier,
5118 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5119 clp->cl_owner_id = str;
5120 return 0;
5121}
5122
5123static int
5124nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5125{
873e3851
JL		 5126 size_t len;
5127 char *str;
ceb3a16c
TM		 5128
5129 if (clp->cl_owner_id != NULL)
873e3851 5130 return 0;
6f2ea7f2
CL		 5131
5132 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5133 return nfs4_init_uniquifier_client_string(clp);
5134
5135 len = 10 + 10 + 1 + 10 + 1 +
5136 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5137
5138 if (len > NFS4_OPAQUE_LIMIT + 1)
5139 return -EINVAL;
5140
5141 /*
5142 * Since this string is allocated at mount time, and held until the
5143 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5144 * about a memory-reclaim deadlock.
5145 */
5146 str = kmalloc(len, GFP_KERNEL);
5147 if (!str)
5148 return -ENOMEM;
5149
f2dd436e 5150 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5151 clp->rpc_ops->version, clp->cl_minorversion,
5152 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5153 clp->cl_owner_id = str;
5154 return 0;
e984a55a
CL		 5155}
5156
706cb8db
CL		 5157/*
5158 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5159 * services. Advertise one based on the address family of the
5160 * clientaddr.
5161 */
5162static unsigned int
5163nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5164{
5165 if (strchr(clp->cl_ipaddr, ':') != NULL)
5166 return scnprintf(buf, len, "tcp6");
5167 else
5168 return scnprintf(buf, len, "tcp");
5169}
5170
f11b2a1c
JL		 5171static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5172{
5173 struct nfs4_setclientid *sc = calldata;
5174
5175 if (task->tk_status == 0)
5176 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5177}
5178
5179static const struct rpc_call_ops nfs4_setclientid_ops = {
5180 .rpc_call_done = nfs4_setclientid_done,
5181};
5182
6bbb4ae8
CL		 5183/**
5184 * nfs4_proc_setclientid - Negotiate client ID
5185 * @clp: state data structure
5186 * @program: RPC program for NFSv4 callback service
5187 * @port: IP port number for NFS4 callback service
5188 * @cred: RPC credential to use for this call
5189 * @res: where to place the result
5190 *
5191 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5192 */
bb8b27e5
TM		 5193int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5194 unsigned short port, struct rpc_cred *cred,
5195 struct nfs4_setclientid_res *res)
1da177e4
LT		 5196{
5197 nfs4_verifier sc_verifier;
5198 struct nfs4_setclientid setclientid = {
5199 .sc_verifier = &sc_verifier,
5200 .sc_prog = program,
3a6bb738 5201 .sc_clnt = clp,
1da177e4
LT		 5202 };
5203 struct rpc_message msg = {
5204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5205 .rpc_argp = &setclientid,
bb8b27e5 5206 .rpc_resp = res,
286d7d6a 5207 .rpc_cred = cred,
1da177e4 5208 };
f11b2a1c
JL		 5209 struct rpc_task *task;
5210 struct rpc_task_setup task_setup_data = {
5211 .rpc_client = clp->cl_rpcclient,
5212 .rpc_message = &msg,
5213 .callback_ops = &nfs4_setclientid_ops,
5214 .callback_data = &setclientid,
5215 .flags = RPC_TASK_TIMEOUT,
5216 };
6bbb4ae8 5217 int status;
1da177e4 5218
de734831 5219 /* nfs_client_id4 */
f092075d 5220 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5221
5222 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5223 status = nfs4_init_uniform_client_string(clp);
5224 else
a3192688 5225 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5226
5227 if (status)
5228 goto out;
3a6bb738 5229
de734831 5230 /* cb_client4 */
706cb8db
CL		 5231 setclientid.sc_netid_len =
5232 nfs4_init_callback_netid(clp,
5233 setclientid.sc_netid,
5234 sizeof(setclientid.sc_netid));
de734831 5235 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5236 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5237 clp->cl_ipaddr, port >> 8, port & 255);
5238
3a6bb738 5239 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5240 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5241 clp->cl_owner_id);
f11b2a1c
JL		 5242 task = rpc_run_task(&task_setup_data);
5243 if (IS_ERR(task)) {
5244 status = PTR_ERR(task);
5245 goto out;
5246 }
5247 status = task->tk_status;
5248 if (setclientid.sc_cred) {
5249 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5250 put_rpccred(setclientid.sc_cred);
5251 }
5252 rpc_put_task(task);
5253out:
c6d01c6f 5254 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5255 dprintk("NFS reply setclientid: %d\n", status);
5256 return status;
1da177e4
LT		 5257}
5258
6bbb4ae8
CL		 5259/**
5260 * nfs4_proc_setclientid_confirm - Confirm client ID
5261 * @clp: state data structure
5262 * @res: result of a previous SETCLIENTID
5263 * @cred: RPC credential to use for this call
5264 *
5265 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5266 */
fd954ae1 5267int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5268 struct nfs4_setclientid_res *arg,
5269 struct rpc_cred *cred)
1da177e4 5270{
1da177e4
LT		 5271 struct rpc_message msg = {
5272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5273 .rpc_argp = arg,
286d7d6a 5274 .rpc_cred = cred,
1da177e4 5275 };
1da177e4
LT		 5276 int status;
5277
6bbb4ae8
CL		 5278 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5279 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5280 clp->cl_clientid);
1bd714f2 5281 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5282 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5283 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5284 return status;
5285}
5286
fe650407
TM		 5287struct nfs4_delegreturndata {
5288 struct nfs4_delegreturnargs args;
fa178f29 5289 struct nfs4_delegreturnres res;
fe650407
TM		 5290 struct nfs_fh fh;
5291 nfs4_stateid stateid;
26e976a8 5292 unsigned long timestamp;
fa178f29 5293 struct nfs_fattr fattr;
fe650407 5294 int rpc_status;
039b756a
PT		 5295 struct inode *inode;
5296 bool roc;
5297 u32 roc_barrier;
fe650407
TM		 5298};
5299
fe650407
TM		 5300static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5301{
5302 struct nfs4_delegreturndata *data = calldata;
938e1010 5303
14516c3a
TM		 5304 if (!nfs4_sequence_done(task, &data->res.seq_res))
5305 return;
938e1010 5306
ca8acf8d 5307 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5308 switch (task->tk_status) {
79708861 5309 case 0:
fa178f29 5310 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5311 case -NFS4ERR_ADMIN_REVOKED:
5312 case -NFS4ERR_DELEG_REVOKED:
5313 case -NFS4ERR_BAD_STATEID:
5314 case -NFS4ERR_OLD_STATEID:
5315 case -NFS4ERR_STALE_STATEID:
5316 case -NFS4ERR_EXPIRED:
5317 task->tk_status = 0;
039b756a
PT		 5318 if (data->roc)
5319 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5320 break;
79708861 5321 default:
8478eaa1
N		 5322 if (nfs4_async_handle_error(task, data->res.server,
5323 NULL, NULL) == -EAGAIN) {
d00c5d43 5324 rpc_restart_call_prepare(task);
79708861
RL		 5325 return;
5326 }
5327 }
5328 data->rpc_status = task->tk_status;
fe650407
TM		 5329}
5330
5331static void nfs4_delegreturn_release(void *calldata)
5332{
039b756a 5333 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5334 struct inode *inode = data->inode;
039b756a 5335
ea7c38fe
TM		 5336 if (inode) {
5337 if (data->roc)
5338 pnfs_roc_release(inode);
5339 nfs_iput_and_deactive(inode);
5340 }
fe650407
TM		 5341 kfree(calldata);
5342}
5343
938e1010
AA		 5344static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5345{
5346 struct nfs4_delegreturndata *d_data;
5347
5348 d_data = (struct nfs4_delegreturndata *)data;
5349
500d701f
PT		 5350 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5351 return;
5352
4ff376fe
TM		 5353 if (d_data->roc)
5354 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5355
d9afbd1b
TM		 5356 nfs4_setup_sequence(d_data->res.server,
5357 &d_data->args.seq_args,
5358 &d_data->res.seq_res,
5359 task);
938e1010 5360}
938e1010 5361
c8d149f3 5362static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5363 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5364 .rpc_call_done = nfs4_delegreturn_done,
5365 .rpc_release = nfs4_delegreturn_release,
5366};
5367
e6f81075 5368static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5369{
5370 struct nfs4_delegreturndata *data;
fa178f29 5371 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5372 struct rpc_task *task;
5138fde0
TM		 5373 struct rpc_message msg = {
5374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5375 .rpc_cred = cred,
5376 };
c970aa85
TM		 5377 struct rpc_task_setup task_setup_data = {
5378 .rpc_client = server->client,
5138fde0 5379 .rpc_message = &msg,
c970aa85
TM		 5380 .callback_ops = &nfs4_delegreturn_ops,
5381 .flags = RPC_TASK_ASYNC,
5382 };
e6f81075 5383 int status = 0;
fe650407 5384
8535b2be 5385 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5386 if (data == NULL)
5387 return -ENOMEM;
a9c92d6b 5388 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5389
5390 nfs4_state_protect(server->nfs_client,
5391 NFS_SP4_MACH_CRED_CLEANUP,
5392 &task_setup_data.rpc_client, &msg);
5393
fe650407
TM		 5394 data->args.fhandle = &data->fh;
5395 data->args.stateid = &data->stateid;
9e907fec 5396 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5397 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5398 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5399 data->res.fattr = &data->fattr;
5400 data->res.server = server;
5138fde0 5401 nfs_fattr_init(data->res.fattr);
26e976a8 5402 data->timestamp = jiffies;
fe650407 5403 data->rpc_status = 0;
ea7c38fe
TM		 5404 data->inode = nfs_igrab_and_active(inode);
5405 if (data->inode)
5406 data->roc = nfs4_roc(inode);
fe650407 5407
c970aa85 5408 task_setup_data.callback_data = data;
1174dd1f
TM		 5409 msg.rpc_argp = &data->args;
5410 msg.rpc_resp = &data->res;
c970aa85 5411 task = rpc_run_task(&task_setup_data);
7a1218a2 5412 if (IS_ERR(task))
fe650407 5413 return PTR_ERR(task);
e6f81075
TM		 5414 if (!issync)
5415 goto out;
fe650407 5416 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5417 if (status != 0)
5418 goto out;
5419 status = data->rpc_status;
e144cbcc
TM		 5420 if (status == 0)
5421 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5422 else
5423 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5424out:
e6b3c4db 5425 rpc_put_task(task);
fe650407 5426 return status;
1da177e4
LT		 5427}
5428
e6f81075 5429int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5430{
5431 struct nfs_server *server = NFS_SERVER(inode);
5432 struct nfs4_exception exception = { };
5433 int err;
5434 do {
e6f81075 5435 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5436 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5437 switch (err) {
5438 case -NFS4ERR_STALE_STATEID:
5439 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5440 case 0:
5441 return 0;
5442 }
5443 err = nfs4_handle_exception(server, err, &exception);
5444 } while (exception.retry);
5445 return err;
5446}
5447
5448#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5449#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5450
5451/*
5452 * sleep, with exponential backoff, and retry the LOCK operation.
5453 */
5454static unsigned long
5455nfs4_set_lock_task_retry(unsigned long timeout)
5456{
416ad3c9 5457 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5458 timeout <<= 1;
5459 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5460 return NFS4_LOCK_MAXTIMEOUT;
5461 return timeout;
5462}
5463
1da177e4
LT		 5464static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5465{
5466 struct inode *inode = state->inode;
5467 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5468 struct nfs_client *clp = server->nfs_client;
911d1aaf 5469 struct nfs_lockt_args arg = {
1da177e4 5470 .fh = NFS_FH(inode),
911d1aaf 5471 .fl = request,
1da177e4 5472 };
911d1aaf
TM		 5473 struct nfs_lockt_res res = {
5474 .denied = request,
1da177e4
LT		 5475 };
5476 struct rpc_message msg = {
5477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5478 .rpc_argp = &arg,
5479 .rpc_resp = &res,
5480 .rpc_cred = state->owner->so_cred,
5481 };
1da177e4
LT		 5482 struct nfs4_lock_state *lsp;
5483 int status;
5484
911d1aaf 5485 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5486 status = nfs4_set_lock_state(state, request);
5487 if (status != 0)
5488 goto out;
5489 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5490 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5491 arg.lock_owner.s_dev = server->s_dev;
7c513058 5492 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5493 switch (status) {
5494 case 0:
5495 request->fl_type = F_UNLCK;
5496 break;
5497 case -NFS4ERR_DENIED:
5498 status = 0;
1da177e4 5499 }
70cc6487 5500 request->fl_ops->fl_release_private(request);
a6f951dd 5501 request->fl_ops = NULL;
8d0a8a9d 5502out:
1da177e4
LT		 5503 return status;
5504}
5505
5506static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5507{
5508 struct nfs4_exception exception = { };
5509 int err;
5510
5511 do {
d1b748a5
TM		 5512 err = _nfs4_proc_getlk(state, cmd, request);
5513 trace_nfs4_get_lock(request, state, cmd, err);
5514 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5515 &exception);
5516 } while (exception.retry);
5517 return err;
5518}
5519
83bfff23 5520static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5521{
4f656367 5522 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5523}
5524
faf5f49c 5525struct nfs4_unlockdata {
911d1aaf
TM		 5526 struct nfs_locku_args arg;
5527 struct nfs_locku_res res;
faf5f49c
TM		 5528 struct nfs4_lock_state *lsp;
5529 struct nfs_open_context *ctx;
911d1aaf 5530 struct file_lock fl;
516285eb 5531 struct nfs_server *server;
26e976a8 5532 unsigned long timestamp;
faf5f49c
TM		 5533};
5534
911d1aaf
TM		 5535static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5536 struct nfs_open_context *ctx,
5537 struct nfs4_lock_state *lsp,
5538 struct nfs_seqid *seqid)
5539{
5540 struct nfs4_unlockdata *p;
5541 struct inode *inode = lsp->ls_state->inode;
5542
8535b2be 5543 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5544 if (p == NULL)
5545 return NULL;
5546 p->arg.fh = NFS_FH(inode);
5547 p->arg.fl = &p->fl;
5548 p->arg.seqid = seqid;
c1d51931 5549 p->res.seqid = seqid;
911d1aaf
TM		 5550 p->lsp = lsp;
5551 atomic_inc(&lsp->ls_count);
5552 /* Ensure we don't close file until we're done freeing locks! */
5553 p->ctx = get_nfs_open_context(ctx);
5554 memcpy(&p->fl, fl, sizeof(p->fl));
5555 p->server = NFS_SERVER(inode);
5556 return p;
5557}
5558
06f814a3 5559static void nfs4_locku_release_calldata(void *data)
faf5f49c 5560{
963d8fe5 5561 struct nfs4_unlockdata *calldata = data;
911d1aaf 5562 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5563 nfs4_put_lock_state(calldata->lsp);
5564 put_nfs_open_context(calldata->ctx);
5565 kfree(calldata);
faf5f49c
TM		 5566}
5567
963d8fe5 5568static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5569{
963d8fe5 5570 struct nfs4_unlockdata *calldata = data;
faf5f49c 5571
14516c3a
TM		 5572 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5573 return;
faf5f49c
TM		 5574 switch (task->tk_status) {
5575 case 0:
26e976a8 5576 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5577 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5578 if (nfs4_update_lock_stateid(calldata->lsp,
5579 &calldata->res.stateid))
5580 break;
9e33bed5
TM		 5581 case -NFS4ERR_BAD_STATEID:
5582 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5583 case -NFS4ERR_STALE_STATEID:
5584 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5585 if (!nfs4_stateid_match(&calldata->arg.stateid,
5586 &calldata->lsp->ls_stateid))
5587 rpc_restart_call_prepare(task);
faf5f49c
TM		 5588 break;
5589 default:
8478eaa1
N		 5590 if (nfs4_async_handle_error(task, calldata->server,
5591 NULL, NULL) == -EAGAIN)
d00c5d43 5592 rpc_restart_call_prepare(task);
faf5f49c 5593 }
2b1bc308 5594 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5595}
5596
4ce70ada 5597static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5598{
4ce70ada 5599 struct nfs4_unlockdata *calldata = data;
faf5f49c 5600
911d1aaf 5601 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5602 goto out_wait;
425c1d4e 5603 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5604 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5605 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5606 goto out_no_action;
faf5f49c 5607 }
26e976a8 5608 calldata->timestamp = jiffies;
035168ab 5609 if (nfs4_setup_sequence(calldata->server,
a893693c 5610 &calldata->arg.seq_args,
2240a9e2
TM		 5611 &calldata->res.seq_res,
5612 task) != 0)
5613 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5614 return;
5615out_no_action:
5616 task->tk_action = NULL;
5617out_wait:
5618 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5619}
5620
963d8fe5 5621static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5622 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5623 .rpc_call_done = nfs4_locku_done,
06f814a3 5624 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5625};
5626
a5d16a4d
TM		 5627static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5628 struct nfs_open_context *ctx,
5629 struct nfs4_lock_state *lsp,
5630 struct nfs_seqid *seqid)
5631{
5632 struct nfs4_unlockdata *data;
5138fde0
TM		 5633 struct rpc_message msg = {
5634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5635 .rpc_cred = ctx->cred,
5636 };
c970aa85
TM		 5637 struct rpc_task_setup task_setup_data = {
5638 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5639 .rpc_message = &msg,
c970aa85 5640 .callback_ops = &nfs4_locku_ops,
101070ca 5641 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5642 .flags = RPC_TASK_ASYNC,
5643 };
a5d16a4d 5644
fa940720
WAA		 5645 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5646 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5647
137d6aca
FF		 5648 /* Ensure this is an unlock - when canceling a lock, the
5649 * canceled lock is passed in, and it won't be an unlock.
5650 */
5651 fl->fl_type = F_UNLCK;
5652
a5d16a4d
TM		 5653 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5654 if (data == NULL) {
5655 nfs_free_seqid(seqid);
5656 return ERR_PTR(-ENOMEM);
5657 }
5658
a9c92d6b 5659 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5660 msg.rpc_argp = &data->arg;
5661 msg.rpc_resp = &data->res;
c970aa85
TM		 5662 task_setup_data.callback_data = data;
5663 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5664}
5665
faf5f49c
TM		 5666static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5667{
65b62a29
TM		 5668 struct inode *inode = state->inode;
5669 struct nfs4_state_owner *sp = state->owner;
5670 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5671 struct nfs_seqid *seqid;
1da177e4 5672 struct nfs4_lock_state *lsp;
06f814a3 5673 struct rpc_task *task;
b4019c0e 5674 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5675 int status = 0;
536ff0f8 5676 unsigned char fl_flags = request->fl_flags;
faf5f49c 5677
8d0a8a9d 5678 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5679 /* Unlock _before_ we do the RPC call */
5680 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5681 /* Exclude nfs_delegation_claim_locks() */
5682 mutex_lock(&sp->so_delegreturn_mutex);
5683 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5684 down_read(&nfsi->rwsem);
83bfff23 5685 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5686 up_read(&nfsi->rwsem);
65b62a29 5687 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5688 goto out;
19e03c57
TM		 5689 }
5690 up_read(&nfsi->rwsem);
65b62a29 5691 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5692 if (status != 0)
9b073574
TM		 5693 goto out;
5694 /* Is this a delegated lock? */
8d0a8a9d 5695 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5696 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5697 goto out;
b4019c0e
TM		 5698 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5699 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5700 status = -ENOMEM;
badc76dd 5701 if (IS_ERR(seqid))
9b073574 5702 goto out;
cd3758e3 5703 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5704 status = PTR_ERR(task);
5705 if (IS_ERR(task))
9b073574 5706 goto out;
a5d16a4d 5707 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5708 rpc_put_task(task);
9b073574 5709out:
536ff0f8 5710 request->fl_flags = fl_flags;
d1b748a5 5711 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5712 return status;
5713}
5714
a5d16a4d
TM		 5715struct nfs4_lockdata {
5716 struct nfs_lock_args arg;
5717 struct nfs_lock_res res;
5718 struct nfs4_lock_state *lsp;
5719 struct nfs_open_context *ctx;
5720 struct file_lock fl;
26e976a8 5721 unsigned long timestamp;
a5d16a4d
TM		 5722 int rpc_status;
5723 int cancelled;
66179efe 5724 struct nfs_server *server;
a5d16a4d
TM		 5725};
5726
5727static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5728 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5729 gfp_t gfp_mask)
1da177e4 5730{
a5d16a4d
TM		 5731 struct nfs4_lockdata *p;
5732 struct inode *inode = lsp->ls_state->inode;
1da177e4 5733 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5734 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5735
8535b2be 5736 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5737 if (p == NULL)
5738 return NULL;
5739
5740 p->arg.fh = NFS_FH(inode);
5741 p->arg.fl = &p->fl;
8535b2be 5742 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5743 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5744 goto out_free;
b4019c0e
TM		 5745 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5746 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5747 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5748 goto out_free_seqid;
7539bbab 5749 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5750 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5751 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5752 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5753 p->lsp = lsp;
66179efe 5754 p->server = server;
a5d16a4d
TM		 5755 atomic_inc(&lsp->ls_count);
5756 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5757 get_file(fl->fl_file);
a5d16a4d
TM		 5758 memcpy(&p->fl, fl, sizeof(p->fl));
5759 return p;
2f74c0a0
TM		 5760out_free_seqid:
5761 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5762out_free:
5763 kfree(p);
5764 return NULL;
5765}
5766
5767static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5768{
5769 struct nfs4_lockdata *data = calldata;
5770 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5771
3110ff80 5772 dprintk("%s: begin!\n", __func__);
2f74c0a0 5773 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5774 goto out_wait;
a5d16a4d 5775 /* Do we need to do an open_to_lock_owner? */
6b447539 5776 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5777 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5778 goto out_release_lock_seqid;
8fe72bac 5779 }
425c1d4e
TM		 5780 nfs4_stateid_copy(&data->arg.open_stateid,
5781 &state->open_stateid);
a5d16a4d 5782 data->arg.new_lock_owner = 1;
c1d51931 5783 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5784 } else {
2f74c0a0 5785 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5786 nfs4_stateid_copy(&data->arg.lock_stateid,
5787 &data->lsp->ls_stateid);
5788 }
5d422301
TM		 5789 if (!nfs4_valid_open_stateid(state)) {
5790 data->rpc_status = -EBADF;
5791 task->tk_action = NULL;
5792 goto out_release_open_seqid;
5793 }
26e976a8 5794 data->timestamp = jiffies;
035168ab
TM		 5795 if (nfs4_setup_sequence(data->server,
5796 &data->arg.seq_args,
2240a9e2 5797 &data->res.seq_res,
d9afbd1b 5798 task) == 0)
66179efe 5799 return;
5d422301 5800out_release_open_seqid:
2240a9e2
TM		 5801 nfs_release_seqid(data->arg.open_seqid);
5802out_release_lock_seqid:
5803 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5804out_wait:
5805 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5806 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5807}
5808
a5d16a4d
TM		 5809static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5810{
5811 struct nfs4_lockdata *data = calldata;
39071e6f 5812 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5813
3110ff80 5814 dprintk("%s: begin!\n", __func__);
a5d16a4d 5815
14516c3a
TM		 5816 if (!nfs4_sequence_done(task, &data->res.seq_res))
5817 return;
66179efe 5818
a5d16a4d 5819 data->rpc_status = task->tk_status;
425c1d4e
TM		 5820 switch (task->tk_status) {
5821 case 0:
2b0143b5 5822 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5823 data->timestamp);
c69899a1
TM		 5824 if (data->arg.new_lock) {
5825 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5826 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5827 rpc_restart_call_prepare(task);
5828 break;
5829 }
5830 }
39071e6f
TM		 5831 if (data->arg.new_lock_owner != 0) {
5832 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5833 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5834 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5835 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5836 rpc_restart_call_prepare(task);
425c1d4e
TM		 5837 break;
5838 case -NFS4ERR_BAD_STATEID:
5839 case -NFS4ERR_OLD_STATEID:
5840 case -NFS4ERR_STALE_STATEID:
5841 case -NFS4ERR_EXPIRED:
5842 if (data->arg.new_lock_owner != 0) {
5843 if (!nfs4_stateid_match(&data->arg.open_stateid,
5844 &lsp->ls_state->open_stateid))
5845 rpc_restart_call_prepare(task);
5846 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5847 &lsp->ls_stateid))
5848 rpc_restart_call_prepare(task);
a5d16a4d 5849 }
3110ff80 5850 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5851}
5852
5853static void nfs4_lock_release(void *calldata)
5854{
5855 struct nfs4_lockdata *data = calldata;
5856
3110ff80 5857 dprintk("%s: begin!\n", __func__);
2f74c0a0 5858 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5859 if (data->cancelled != 0) {
5860 struct rpc_task *task;
5861 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5862 data->arg.lock_seqid);
5863 if (!IS_ERR(task))
bf294b41 5864 rpc_put_task_async(task);
3110ff80 5865 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5866 } else
5867 nfs_free_seqid(data->arg.lock_seqid);
5868 nfs4_put_lock_state(data->lsp);
5869 put_nfs_open_context(data->ctx);
feaff8e5 5870 fput(data->fl.fl_file);
a5d16a4d 5871 kfree(data);
3110ff80 5872 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5873}
5874
5875static const struct rpc_call_ops nfs4_lock_ops = {
5876 .rpc_call_prepare = nfs4_lock_prepare,
5877 .rpc_call_done = nfs4_lock_done,
5878 .rpc_release = nfs4_lock_release,
5879};
5880
2bee72a6
TM		 5881static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5882{
2bee72a6
TM		 5883 switch (error) {
5884 case -NFS4ERR_ADMIN_REVOKED:
5885 case -NFS4ERR_BAD_STATEID:
ecac799a 5886 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5887 if (new_lock_owner != 0 ||
795a88c9 5888 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5889 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5890 break;
5891 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5892 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5893 case -NFS4ERR_EXPIRED:
5894 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5895 };
5896}
5897
afe6c27c 5898static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5899{
5900 struct nfs4_lockdata *data;
5901 struct rpc_task *task;
5138fde0
TM		 5902 struct rpc_message msg = {
5903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5904 .rpc_cred = state->owner->so_cred,
5905 };
c970aa85
TM		 5906 struct rpc_task_setup task_setup_data = {
5907 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5908 .rpc_message = &msg,
c970aa85 5909 .callback_ops = &nfs4_lock_ops,
101070ca 5910 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5911 .flags = RPC_TASK_ASYNC,
5912 };
a5d16a4d
TM		 5913 int ret;
5914
3110ff80 5915 dprintk("%s: begin!\n", __func__);
cd3758e3 5916 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5917 fl->fl_u.nfs4_fl.owner,
5918 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5919 if (data == NULL)
5920 return -ENOMEM;
5921 if (IS_SETLKW(cmd))
5922 data->arg.block = 1;
a9c92d6b 5923 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5924 msg.rpc_argp = &data->arg;
5925 msg.rpc_resp = &data->res;
c970aa85 5926 task_setup_data.callback_data = data;
8fe72bac
TM		 5927 if (recovery_type > NFS_LOCK_NEW) {
5928 if (recovery_type == NFS_LOCK_RECLAIM)
5929 data->arg.reclaim = NFS_LOCK_RECLAIM;
5930 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5931 } else
5932 data->arg.new_lock = 1;
c970aa85 5933 task = rpc_run_task(&task_setup_data);
7a1218a2 5934 if (IS_ERR(task))
a5d16a4d 5935 return PTR_ERR(task);
a5d16a4d
TM		 5936 ret = nfs4_wait_for_completion_rpc_task(task);
5937 if (ret == 0) {
5938 ret = data->rpc_status;
2bee72a6
TM		 5939 if (ret)
5940 nfs4_handle_setlk_error(data->server, data->lsp,
5941 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5942 } else
5943 data->cancelled = 1;
e6b3c4db 5944 rpc_put_task(task);
3110ff80 5945 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 5946 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 5947 return ret;
1da177e4
LT		 5948}
5949
5950static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5951{
202b50dc 5952 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5953 struct nfs4_exception exception = {
5954 .inode = state->inode,
5955 };
202b50dc
TM		 5956 int err;
5957
5958 do {
42a2d13e
TM		 5959 /* Cache the lock if possible... */
5960 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5961 return 0;
afe6c27c 5962 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5963 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5964 break;
5965 nfs4_handle_exception(server, err, &exception);
5966 } while (exception.retry);
5967 return err;
1da177e4
LT		 5968}
5969
5970static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5971{
202b50dc 5972 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5973 struct nfs4_exception exception = {
5974 .inode = state->inode,
5975 };
202b50dc
TM		 5976 int err;
5977
6bfc93ef
TM		 5978 err = nfs4_set_lock_state(state, request);
5979 if (err != 0)
5980 return err;
f6de7a39 5981 if (!recover_lost_locks) {
ef1820f9
N		 5982 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5983 return 0;
5984 }
202b50dc 5985 do {
42a2d13e
TM		 5986 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5987 return 0;
afe6c27c 5988 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5989 switch (err) {
5990 default:
5991 goto out;
5992 case -NFS4ERR_GRACE:
5993 case -NFS4ERR_DELAY:
5994 nfs4_handle_exception(server, err, &exception);
5995 err = 0;
5996 }
202b50dc 5997 } while (exception.retry);
a9ed2e25 5998out:
202b50dc 5999 return err;
1da177e4
LT		 6000}
6001
f062eb6c 6002#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6003/**
6004 * nfs41_check_expired_locks - possibly free a lock stateid
6005 *
6006 * @state: NFSv4 state for an inode
6007 *
6008 * Returns NFS_OK if recovery for this stateid is now finished.
6009 * Otherwise a negative NFS4ERR value is returned.
6010 */
b01dd1d8 6011static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6012{
eb64cf96 6013 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6014 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6015 struct nfs_server *server = NFS_SERVER(state->inode);
6016
b01dd1d8 6017 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6018 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6019 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6020
6021 status = nfs41_test_stateid(server,
6022 &lsp->ls_stateid,
6023 cred);
08cb47fa 6024 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6025 if (status != NFS_OK) {
3e60ffdd
CL		 6026 /* Free the stateid unless the server
6027 * informs us the stateid is unrecognized. */
89af2739
CL		 6028 if (status != -NFS4ERR_BAD_STATEID)
6029 nfs41_free_stateid(server,
ab7cb0df
TM		 6030 &lsp->ls_stateid,
6031 cred);
795a88c9 6032 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6033 ret = status;
6034 }
6035 }
6036 };
6037
6038 return ret;
6039}
6040
6041static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6042{
6043 int status = NFS_OK;
6044
6045 if (test_bit(LK_STATE_IN_USE, &state->flags))
6046 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6047 if (status != NFS_OK)
6048 status = nfs4_lock_expired(state, request);
6049 return status;
f062eb6c
BS		 6050}
6051#endif
6052
1da177e4
LT		 6053static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6054{
19e03c57 6055 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6056 unsigned char fl_flags = request->fl_flags;
8e469ebd 6057 int status = -ENOLCK;
1da177e4 6058
8e469ebd
TM		 6059 if ((fl_flags & FL_POSIX) &&
6060 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6061 goto out;
6bfc93ef 6062 /* Is this a delegated open? */
6bfc93ef
TM		 6063 status = nfs4_set_lock_state(state, request);
6064 if (status != 0)
6065 goto out;
01c3b861 6066 request->fl_flags |= FL_ACCESS;
83bfff23 6067 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6068 if (status < 0)
6069 goto out;
19e03c57 6070 down_read(&nfsi->rwsem);
01c3b861 6071 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6072 /* Yes: cache locks! */
01c3b861 6073 /* ...but avoid races with delegation recall... */
19e03c57 6074 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6075 status = do_vfs_lock(state->inode, request);
c69899a1 6076 up_read(&nfsi->rwsem);
9a99af49 6077 goto out;
9a99af49 6078 }
19e03c57 6079 up_read(&nfsi->rwsem);
c69899a1 6080 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6081out:
6082 request->fl_flags = fl_flags;
1da177e4
LT		 6083 return status;
6084}
6085
6086static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6087{
a1d0b5ee
TM		 6088 struct nfs4_exception exception = {
6089 .state = state,
05ffe24f 6090 .inode = state->inode,
a1d0b5ee 6091 };
1da177e4
LT		 6092 int err;
6093
6094 do {
965b5d67
TM		 6095 err = _nfs4_proc_setlk(state, cmd, request);
6096 if (err == -NFS4ERR_DENIED)
6097 err = -EAGAIN;
1da177e4 6098 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6099 err, &exception);
1da177e4
LT		 6100 } while (exception.retry);
6101 return err;
6102}
6103
6104static int
6105nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6106{
6107 struct nfs_open_context *ctx;
6108 struct nfs4_state *state;
6109 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6110 int status;
6111
6112 /* verify open state */
cd3758e3 6113 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6114 state = ctx->state;
6115
6116 if (request->fl_start < 0 || request->fl_end < 0)
6117 return -EINVAL;
6118
d953126a
TM		 6119 if (IS_GETLK(cmd)) {
6120 if (state != NULL)
6121 return nfs4_proc_getlk(state, F_GETLK, request);
6122 return 0;
6123 }
1da177e4
LT		 6124
6125 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6126 return -EINVAL;
6127
d953126a
TM		 6128 if (request->fl_type == F_UNLCK) {
6129 if (state != NULL)
6130 return nfs4_proc_unlck(state, cmd, request);
6131 return 0;
6132 }
1da177e4 6133
d953126a
TM		 6134 if (state == NULL)
6135 return -ENOLCK;
55725513
TM		 6136 /*
6137 * Don't rely on the VFS having checked the file open mode,
6138 * since it won't do this for flock() locks.
6139 */
f44106e2 6140 switch (request->fl_type) {
55725513
TM		 6141 case F_RDLCK:
6142 if (!(filp->f_mode & FMODE_READ))
6143 return -EBADF;
6144 break;
6145 case F_WRLCK:
6146 if (!(filp->f_mode & FMODE_WRITE))
6147 return -EBADF;
6148 }
6149
1da177e4
LT		 6150 do {
6151 status = nfs4_proc_setlk(state, cmd, request);
6152 if ((status != -EAGAIN) || IS_SETLK(cmd))
6153 break;
6154 timeout = nfs4_set_lock_task_retry(timeout);
6155 status = -ERESTARTSYS;
6156 if (signalled())
6157 break;
6158 } while(status < 0);
1da177e4
LT		 6159 return status;
6160}
6161
db4f2e63 6162int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6163{
6164 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6165 int err;
6166
6167 err = nfs4_set_lock_state(state, fl);
6168 if (err != 0)
db4f2e63 6169 return err;
4a706fa0 6170 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6171 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6172}
6b3b5496 6173
cf470c3e
TM		 6174struct nfs_release_lockowner_data {
6175 struct nfs4_lock_state *lsp;
5ae67c4f 6176 struct nfs_server *server;
cf470c3e 6177 struct nfs_release_lockowner_args args;
b7e63a10 6178 struct nfs_release_lockowner_res res;
60ea6812 6179 unsigned long timestamp;
cf470c3e
TM		 6180};
6181
fbd4bfd1
CL		 6182static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6183{
6184 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6185 struct nfs_server *server = data->server;
cb04ad2a
PT		 6186 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6187 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6188 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6189 data->timestamp = jiffies;
fbd4bfd1
CL		 6190}
6191
6192static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6193{
6194 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6195 struct nfs_server *server = data->server;
6196
b7e63a10 6197 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6198
6199 switch (task->tk_status) {
6200 case 0:
6201 renew_lease(server, data->timestamp);
6202 break;
6203 case -NFS4ERR_STALE_CLIENTID:
6204 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6205 nfs4_schedule_lease_recovery(server->nfs_client);
6206 break;
60ea6812
CL		 6207 case -NFS4ERR_LEASE_MOVED:
6208 case -NFS4ERR_DELAY:
8478eaa1
N		 6209 if (nfs4_async_handle_error(task, server,
6210 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6211 rpc_restart_call_prepare(task);
6212 }
fbd4bfd1
CL		 6213}
6214
d3c7b7cc
TM		 6215static void nfs4_release_lockowner_release(void *calldata)
6216{
cf470c3e 6217 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6218 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6219 kfree(calldata);
6220}
6221
17280175 6222static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6223 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6224 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6225 .rpc_release = nfs4_release_lockowner_release,
6226};
6227
f1cdae87
JL		 6228static void
6229nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6230{
cf470c3e 6231 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6232 struct rpc_message msg = {
6233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6234 };
6235
6236 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6237 return;
fbd4bfd1 6238
cf470c3e
TM		 6239 data = kmalloc(sizeof(*data), GFP_NOFS);
6240 if (!data)
f1cdae87 6241 return;
cf470c3e 6242 data->lsp = lsp;
5ae67c4f 6243 data->server = server;
cf470c3e
TM		 6244 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6245 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6246 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6247
cf470c3e 6248 msg.rpc_argp = &data->args;
b7e63a10
TM		 6249 msg.rpc_resp = &data->res;
6250 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6251 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6252}
6253
aa1870af
BF		 6254#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6255
d9a82a04
AG		 6256static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6257 struct dentry *dentry, const char *key,
64c2ce8b 6258 const void *buf, size_t buflen,
d9a82a04 6259 int flags)
6b3b5496 6260{
2b0143b5 6261 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6262}
6263
d9a82a04
AG		 6264static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6265 struct dentry *dentry, const char *key,
6266 void *buf, size_t buflen)
6b3b5496 6267{
2b0143b5 6268 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6269}
6270
764a5c6b 6271static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6272{
764a5c6b 6273 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6274}
6275
c9bccef6 6276#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6277
d9a82a04
AG		 6278static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6279 struct dentry *dentry, const char *key,
6280 const void *buf, size_t buflen,
6281 int flags)
c9bccef6
DQ		 6282{
6283 if (security_ismaclabel(key))
6284 return nfs4_set_security_label(dentry, buf, buflen);
6285
6286 return -EOPNOTSUPP;
6287}
6288
d9a82a04
AG		 6289static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6290 struct dentry *dentry, const char *key,
6291 void *buf, size_t buflen)
c9bccef6
DQ		 6292{
6293 if (security_ismaclabel(key))
2b0143b5 6294 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6295 return -EOPNOTSUPP;
6296}
6297
c4803c49
AG		 6298static ssize_t
6299nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6300{
c4803c49 6301 int len = 0;
c9bccef6 6302
c4803c49
AG		 6303 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6304 len = security_inode_listsecurity(inode, list, list_len);
6305 if (list_len && len > list_len)
6306 return -ERANGE;
c9bccef6
DQ		 6307 }
6308 return len;
6309}
6310
6311static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6312 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6313 .get = nfs4_xattr_get_nfs4_label,
6314 .set = nfs4_xattr_set_nfs4_label,
6315};
c9bccef6 6316
c4803c49
AG		 6317#else
6318
6319static ssize_t
6320nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6321{
6322 return 0;
6323}
6324
6325#endif
c9bccef6 6326
533eb461
AA		 6327/*
6328 * nfs_fhget will use either the mounted_on_fileid or the fileid
6329 */
69aaaae1
TM		 6330static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6331{
533eb461
AA		 6332 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6333 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6334 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6335 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6336 return;
6337
6338 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6339 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6340 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6341 fattr->nlink = 2;
6342}
6343
f05d147f
BS		 6344static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6345 const struct qstr *name,
6346 struct nfs4_fs_locations *fs_locations,
6347 struct page *page)
683b57b4
TM		 6348{
6349 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6350 u32 bitmask[3] = {
361e624f 6351 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6352 };
6353 struct nfs4_fs_locations_arg args = {
6354 .dir_fh = NFS_FH(dir),
c228fd3a 6355 .name = name,
683b57b4
TM		 6356 .page = page,
6357 .bitmask = bitmask,
6358 };
22958463
BH		 6359 struct nfs4_fs_locations_res res = {
6360 .fs_locations = fs_locations,
6361 };
683b57b4
TM		 6362 struct rpc_message msg = {
6363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6364 .rpc_argp = &args,
22958463 6365 .rpc_resp = &res,
683b57b4
TM		 6366 };
6367 int status;
6368
3110ff80 6369 dprintk("%s: start\n", __func__);
533eb461
AA		 6370
6371 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6372 * is not supported */
6373 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6374 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6375 else
6376 bitmask[0] |= FATTR4_WORD0_FILEID;
6377
c228fd3a 6378 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6379 fs_locations->server = server;
830b8e33 6380 fs_locations->nlocations = 0;
f05d147f 6381 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6382 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6383 return status;
6384}
6385
f05d147f
BS		 6386int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6387 const struct qstr *name,
6388 struct nfs4_fs_locations *fs_locations,
6389 struct page *page)
db0a9593
BS		 6390{
6391 struct nfs4_exception exception = { };
6392 int err;
6393 do {
078ea3df
TM		 6394 err = _nfs4_proc_fs_locations(client, dir, name,
6395 fs_locations, page);
6396 trace_nfs4_get_fs_locations(dir, name, err);
6397 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6398 &exception);
6399 } while (exception.retry);
6400 return err;
6401}
6402
b03d735b
CL		 6403/*
6404 * This operation also signals the server that this client is
6405 * performing migration recovery. The server can stop returning
6406 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6407 * appended to this compound to identify the client ID which is
6408 * performing recovery.
6409 */
6410static int _nfs40_proc_get_locations(struct inode *inode,
6411 struct nfs4_fs_locations *locations,
6412 struct page *page, struct rpc_cred *cred)
6413{
6414 struct nfs_server *server = NFS_SERVER(inode);
6415 struct rpc_clnt *clnt = server->client;
6416 u32 bitmask[2] = {
6417 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6418 };
6419 struct nfs4_fs_locations_arg args = {
6420 .clientid = server->nfs_client->cl_clientid,
6421 .fh = NFS_FH(inode),
6422 .page = page,
6423 .bitmask = bitmask,
6424 .migration = 1, /* skip LOOKUP */
6425 .renew = 1, /* append RENEW */
6426 };
6427 struct nfs4_fs_locations_res res = {
6428 .fs_locations = locations,
6429 .migration = 1,
6430 .renew = 1,
6431 };
6432 struct rpc_message msg = {
6433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6434 .rpc_argp = &args,
6435 .rpc_resp = &res,
6436 .rpc_cred = cred,
6437 };
6438 unsigned long now = jiffies;
6439 int status;
6440
6441 nfs_fattr_init(&locations->fattr);
6442 locations->server = server;
6443 locations->nlocations = 0;
6444
6445 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6446 nfs4_set_sequence_privileged(&args.seq_args);
6447 status = nfs4_call_sync_sequence(clnt, server, &msg,
6448 &args.seq_args, &res.seq_res);
6449 if (status)
6450 return status;
6451
6452 renew_lease(server, now);
6453 return 0;
6454}
6455
6456#ifdef CONFIG_NFS_V4_1
6457
6458/*
6459 * This operation also signals the server that this client is
6460 * performing migration recovery. The server can stop asserting
6461 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6462 * performing this operation is identified in the SEQUENCE
6463 * operation in this compound.
6464 *
6465 * When the client supports GETATTR(fs_locations_info), it can
6466 * be plumbed in here.
6467 */
6468static int _nfs41_proc_get_locations(struct inode *inode,
6469 struct nfs4_fs_locations *locations,
6470 struct page *page, struct rpc_cred *cred)
6471{
6472 struct nfs_server *server = NFS_SERVER(inode);
6473 struct rpc_clnt *clnt = server->client;
6474 u32 bitmask[2] = {
6475 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6476 };
6477 struct nfs4_fs_locations_arg args = {
6478 .fh = NFS_FH(inode),
6479 .page = page,
6480 .bitmask = bitmask,
6481 .migration = 1, /* skip LOOKUP */
6482 };
6483 struct nfs4_fs_locations_res res = {
6484 .fs_locations = locations,
6485 .migration = 1,
6486 };
6487 struct rpc_message msg = {
6488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6489 .rpc_argp = &args,
6490 .rpc_resp = &res,
6491 .rpc_cred = cred,
6492 };
6493 int status;
6494
6495 nfs_fattr_init(&locations->fattr);
6496 locations->server = server;
6497 locations->nlocations = 0;
6498
6499 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6500 nfs4_set_sequence_privileged(&args.seq_args);
6501 status = nfs4_call_sync_sequence(clnt, server, &msg,
6502 &args.seq_args, &res.seq_res);
6503 if (status == NFS4_OK &&
6504 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6505 status = -NFS4ERR_LEASE_MOVED;
6506 return status;
6507}
6508
6509#endif /* CONFIG_NFS_V4_1 */
6510
6511/**
6512 * nfs4_proc_get_locations - discover locations for a migrated FSID
6513 * @inode: inode on FSID that is migrating
6514 * @locations: result of query
6515 * @page: buffer
6516 * @cred: credential to use for this operation
6517 *
6518 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6519 * operation failed, or a negative errno if a local error occurred.
6520 *
6521 * On success, "locations" is filled in, but if the server has
6522 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6523 * asserted.
6524 *
6525 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6526 * from this client that require migration recovery.
6527 */
6528int nfs4_proc_get_locations(struct inode *inode,
6529 struct nfs4_fs_locations *locations,
6530 struct page *page, struct rpc_cred *cred)
6531{
6532 struct nfs_server *server = NFS_SERVER(inode);
6533 struct nfs_client *clp = server->nfs_client;
6534 const struct nfs4_mig_recovery_ops *ops =
6535 clp->cl_mvops->mig_recovery_ops;
6536 struct nfs4_exception exception = { };
6537 int status;
6538
6539 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6540 (unsigned long long)server->fsid.major,
6541 (unsigned long long)server->fsid.minor,
6542 clp->cl_hostname);
6543 nfs_display_fhandle(NFS_FH(inode), __func__);
6544
6545 do {
6546 status = ops->get_locations(inode, locations, page, cred);
6547 if (status != -NFS4ERR_DELAY)
6548 break;
6549 nfs4_handle_exception(server, status, &exception);
6550 } while (exception.retry);
6551 return status;
6552}
6553
44c99933
CL		 6554/*
6555 * This operation also signals the server that this client is
6556 * performing "lease moved" recovery. The server can stop
6557 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6558 * is appended to this compound to identify the client ID which is
6559 * performing recovery.
6560 */
6561static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6562{
6563 struct nfs_server *server = NFS_SERVER(inode);
6564 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6565 struct rpc_clnt *clnt = server->client;
6566 struct nfs4_fsid_present_arg args = {
6567 .fh = NFS_FH(inode),
6568 .clientid = clp->cl_clientid,
6569 .renew = 1, /* append RENEW */
6570 };
6571 struct nfs4_fsid_present_res res = {
6572 .renew = 1,
6573 };
6574 struct rpc_message msg = {
6575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6576 .rpc_argp = &args,
6577 .rpc_resp = &res,
6578 .rpc_cred = cred,
6579 };
6580 unsigned long now = jiffies;
6581 int status;
6582
6583 res.fh = nfs_alloc_fhandle();
6584 if (res.fh == NULL)
6585 return -ENOMEM;
6586
6587 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6588 nfs4_set_sequence_privileged(&args.seq_args);
6589 status = nfs4_call_sync_sequence(clnt, server, &msg,
6590 &args.seq_args, &res.seq_res);
6591 nfs_free_fhandle(res.fh);
6592 if (status)
6593 return status;
6594
6595 do_renew_lease(clp, now);
6596 return 0;
6597}
6598
6599#ifdef CONFIG_NFS_V4_1
6600
6601/*
6602 * This operation also signals the server that this client is
6603 * performing "lease moved" recovery. The server can stop asserting
6604 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6605 * this operation is identified in the SEQUENCE operation in this
6606 * compound.
6607 */
6608static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6609{
6610 struct nfs_server *server = NFS_SERVER(inode);
6611 struct rpc_clnt *clnt = server->client;
6612 struct nfs4_fsid_present_arg args = {
6613 .fh = NFS_FH(inode),
6614 };
6615 struct nfs4_fsid_present_res res = {
6616 };
6617 struct rpc_message msg = {
6618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6619 .rpc_argp = &args,
6620 .rpc_resp = &res,
6621 .rpc_cred = cred,
6622 };
6623 int status;
6624
6625 res.fh = nfs_alloc_fhandle();
6626 if (res.fh == NULL)
6627 return -ENOMEM;
6628
6629 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6630 nfs4_set_sequence_privileged(&args.seq_args);
6631 status = nfs4_call_sync_sequence(clnt, server, &msg,
6632 &args.seq_args, &res.seq_res);
6633 nfs_free_fhandle(res.fh);
6634 if (status == NFS4_OK &&
6635 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6636 status = -NFS4ERR_LEASE_MOVED;
6637 return status;
6638}
6639
6640#endif /* CONFIG_NFS_V4_1 */
6641
6642/**
6643 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6644 * @inode: inode on FSID to check
6645 * @cred: credential to use for this operation
6646 *
6647 * Server indicates whether the FSID is present, moved, or not
6648 * recognized. This operation is necessary to clear a LEASE_MOVED
6649 * condition for this client ID.
6650 *
6651 * Returns NFS4_OK if the FSID is present on this server,
6652 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6653 * NFS4ERR code if some error occurred on the server, or a
6654 * negative errno if a local failure occurred.
6655 */
6656int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6657{
6658 struct nfs_server *server = NFS_SERVER(inode);
6659 struct nfs_client *clp = server->nfs_client;
6660 const struct nfs4_mig_recovery_ops *ops =
6661 clp->cl_mvops->mig_recovery_ops;
6662 struct nfs4_exception exception = { };
6663 int status;
6664
6665 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6666 (unsigned long long)server->fsid.major,
6667 (unsigned long long)server->fsid.minor,
6668 clp->cl_hostname);
6669 nfs_display_fhandle(NFS_FH(inode), __func__);
6670
6671 do {
6672 status = ops->fsid_present(inode, cred);
6673 if (status != -NFS4ERR_DELAY)
6674 break;
6675 nfs4_handle_exception(server, status, &exception);
6676 } while (exception.retry);
6677 return status;
6678}
6679
5ec16a85 6680/**
a5250def
WAA		 6681 * If 'use_integrity' is true and the state managment nfs_client
6682 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6683 * and the machine credential as per RFC3530bis and RFC5661 Security
6684 * Considerations sections. Otherwise, just use the user cred with the
6685 * filesystem's rpc_client.
5ec16a85 6686 */
a5250def 6687static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6688{
6689 int status;
6690 struct nfs4_secinfo_arg args = {
6691 .dir_fh = NFS_FH(dir),
6692 .name = name,
6693 };
6694 struct nfs4_secinfo_res res = {
6695 .flavors = flavors,
6696 };
6697 struct rpc_message msg = {
6698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6699 .rpc_argp = &args,
6700 .rpc_resp = &res,
6701 };
a5250def 6702 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6703 struct rpc_cred *cred = NULL;
a5250def
WAA		 6704
6705 if (use_integrity) {
6706 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6707 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6708 msg.rpc_cred = cred;
a5250def 6709 }
5a5ea0d4
BS		 6710
6711 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6712
6713 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6714 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6715
a5250def
WAA		 6716 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6717 &res.seq_res, 0);
5a5ea0d4 6718 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6719
7cb852df
WAA		 6720 if (cred)
6721 put_rpccred(cred);
a5250def 6722
5a5ea0d4
BS		 6723 return status;
6724}
6725
72de53ec
BS		 6726int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6727 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6728{
6729 struct nfs4_exception exception = { };
6730 int err;
6731 do {
a5250def
WAA		 6732 err = -NFS4ERR_WRONGSEC;
6733
6734 /* try to use integrity protection with machine cred */
6735 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6736 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6737
6738 /*
6739 * if unable to use integrity protection, or SECINFO with
6740 * integrity protection returns NFS4ERR_WRONGSEC (which is
6741 * disallowed by spec, but exists in deployed servers) use
6742 * the current filesystem's rpc_client and the user cred.
6743 */
6744 if (err == -NFS4ERR_WRONGSEC)
6745 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6746
078ea3df
TM		 6747 trace_nfs4_secinfo(dir, name, err);
6748 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6749 &exception);
6750 } while (exception.retry);
6751 return err;
6752}
6753
557134a3 6754#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6755/*
6756 * Check the exchange flags returned by the server for invalid flags, having
6757 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6758 * DS flags set.
6759 */
6760static int nfs4_check_cl_exchange_flags(u32 flags)
6761{
6762 if (flags & ~EXCHGID4_FLAG_MASK_R)
6763 goto out_inval;
6764 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6765 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6766 goto out_inval;
6767 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6768 goto out_inval;
6769 return NFS_OK;
6770out_inval:
6771 return -NFS4ERR_INVAL;
6772}
6773
78fe0f41 6774static bool
79d4e1f0
CL		 6775nfs41_same_server_scope(struct nfs41_server_scope *a,
6776 struct nfs41_server_scope *b)
78fe0f41
WAA		 6777{
6778 if (a->server_scope_sz == b->server_scope_sz &&
6779 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6780 return true;
6781
6782 return false;
6783}
6784
7c44f1ae
WAA		 6785/*
6786 * nfs4_proc_bind_conn_to_session()
6787 *
6788 * The 4.1 client currently uses the same TCP connection for the
6789 * fore and backchannel.
6790 */
2cf047c9 6791int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6792{
6793 int status;
71a097c6
TM		 6794 struct nfs41_bind_conn_to_session_args args = {
6795 .client = clp,
6796 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6797 };
7c44f1ae
WAA		 6798 struct nfs41_bind_conn_to_session_res res;
6799 struct rpc_message msg = {
6800 .rpc_proc =
6801 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6802 .rpc_argp = &args,
7c44f1ae 6803 .rpc_resp = &res,
2cf047c9 6804 .rpc_cred = cred,
7c44f1ae
WAA		 6805 };
6806
6807 dprintk("--> %s\n", __func__);
7c44f1ae 6808
71a097c6
TM		 6809 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6810 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6811 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6812
6813 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6814 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6815 if (status == 0) {
71a097c6 6816 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6817 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6818 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6819 status = -EIO;
71a097c6 6820 goto out;
7c44f1ae 6821 }
71a097c6 6822 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6823 dprintk("NFS: %s: Unexpected direction from server\n",
6824 __func__);
6825 status = -EIO;
71a097c6 6826 goto out;
7c44f1ae 6827 }
71a097c6 6828 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6829 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6830 __func__);
6831 status = -EIO;
71a097c6 6832 goto out;
7c44f1ae
WAA		 6833 }
6834 }
7c44f1ae
WAA		 6835out:
6836 dprintk("<-- %s status= %d\n", __func__, status);
6837 return status;
6838}
6839
99fe60d0 6840/*
fa940720
WAA		 6841 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6842 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6843 */
6844static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6845 .how = SP4_MACH_CRED,
6846 .enforce.u.words = {
6847 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6848 1 << (OP_EXCHANGE_ID - 32) |
6849 1 << (OP_CREATE_SESSION - 32) |
6850 1 << (OP_DESTROY_SESSION - 32) |
6851 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6852 },
6853 .allow.u.words = {
6854 [0] = 1 << (OP_CLOSE) |
99ade3c7 6855 1 << (OP_OPEN_DOWNGRADE) |
a0279625 6856 1 << (OP_LOCKU) |
99ade3c7 6857 1 << (OP_DELEGRETURN) |
a0279625 6858 1 << (OP_COMMIT),
8b5bee2e 6859 [1] = 1 << (OP_SECINFO - 32) |
3787d506 6860 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 6861 1 << (OP_LAYOUTRETURN - 32) |
3787d506 6862 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6863 1 << (OP_FREE_STATEID - 32) |
6864 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6865 }
6866};
6867
6868/*
6869 * Select the state protection mode for client `clp' given the server results
6870 * from exchange_id in `sp'.
99fe60d0 6871 *
2031cd1a
WAA		 6872 * Returns 0 on success, negative errno otherwise.
6873 */
6874static int nfs4_sp4_select_mode(struct nfs_client *clp,
6875 struct nfs41_state_protection *sp)
6876{
6877 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6878 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6879 1 << (OP_EXCHANGE_ID - 32) |
6880 1 << (OP_CREATE_SESSION - 32) |
6881 1 << (OP_DESTROY_SESSION - 32) |
6882 1 << (OP_DESTROY_CLIENTID - 32)
6883 };
6884 unsigned int i;
6885
6886 if (sp->how == SP4_MACH_CRED) {
6887 /* Print state protect result */
6888 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6889 for (i = 0; i <= LAST_NFS4_OP; i++) {
6890 if (test_bit(i, sp->enforce.u.longs))
6891 dfprintk(MOUNT, " enforce op %d\n", i);
6892 if (test_bit(i, sp->allow.u.longs))
6893 dfprintk(MOUNT, " allow op %d\n", i);
6894 }
6895
6896 /* make sure nothing is on enforce list that isn't supported */
6897 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6898 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6899 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6900 return -EINVAL;
6901 }
6902 }
6903
6904 /*
6905 * Minimal mode - state operations are allowed to use machine
6906 * credential. Note this already happens by default, so the
6907 * client doesn't have to do anything more than the negotiation.
6908 *
6909 * NOTE: we don't care if EXCHANGE_ID is in the list -
6910 * we're already using the machine cred for exchange_id
6911 * and will never use a different cred.
6912 */
6913 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6914 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6915 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6916 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6917 dfprintk(MOUNT, "sp4_mach_cred:\n");
6918 dfprintk(MOUNT, " minimal mode enabled\n");
6919 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6920 } else {
6921 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6922 return -EINVAL;
6923 }
fa940720
WAA		 6924
6925 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 6926 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
6927 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 6928 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6929 dfprintk(MOUNT, " cleanup mode enabled\n");
6930 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6931 }
8b5bee2e 6932
99ade3c7
AE		 6933 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
6934 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
6935 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
6936 &clp->cl_sp4_flags);
6937 }
6938
8b5bee2e
WAA		 6939 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6940 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6941 dfprintk(MOUNT, " secinfo mode enabled\n");
6942 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6943 }
3787d506
WAA		 6944
6945 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6946 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6947 dfprintk(MOUNT, " stateid mode enabled\n");
6948 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6949 }
8c21c62c
WAA		 6950
6951 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6952 dfprintk(MOUNT, " write mode enabled\n");
6953 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6954 }
6955
6956 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6957 dfprintk(MOUNT, " commit mode enabled\n");
6958 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6959 }
2031cd1a
WAA		 6960 }
6961
6962 return 0;
6963}
6964
6965/*
6966 * _nfs4_proc_exchange_id()
6bbb4ae8 6967 *
2031cd1a 6968 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6969 */
2031cd1a
WAA		 6970static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6971 u32 sp4_how)
99fe60d0
BH		 6972{
6973 nfs4_verifier verifier;
6974 struct nfs41_exchange_id_args args = {
cd93710e 6975 .verifier = &verifier,
99fe60d0 6976 .client = clp,
cd3fadec 6977#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6978 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6979 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6980 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6981#else
6982 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6983 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6984#endif
99fe60d0
BH		 6985 };
6986 struct nfs41_exchange_id_res res = {
32b01310 6987 0
99fe60d0
BH		 6988 };
6989 int status;
6990 struct rpc_message msg = {
6991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6992 .rpc_argp = &args,
6993 .rpc_resp = &res,
6994 .rpc_cred = cred,
6995 };
99fe60d0 6996
f092075d 6997 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6998
6999 status = nfs4_init_uniform_client_string(clp);
7000 if (status)
3a6bb738 7001 goto out;
3a6bb738
JL		 7002
7003 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7004 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7005 clp->cl_owner_id);
99fe60d0 7006
acdeb69d 7007 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7008 GFP_NOFS);
acdeb69d 7009 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7010 status = -ENOMEM;
7011 goto out;
7012 }
78fe0f41 7013
79d4e1f0 7014 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7015 GFP_NOFS);
177313f1 7016 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7017 status = -ENOMEM;
acdeb69d 7018 goto out_server_owner;
abe9a6d5 7019 }
78fe0f41 7020
bbafffd2 7021 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7022 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7023 status = -ENOMEM;
7024 goto out_server_scope;
7025 }
7026
2031cd1a
WAA		 7027 switch (sp4_how) {
7028 case SP4_NONE:
7029 args.state_protect.how = SP4_NONE;
7030 break;
7031
7032 case SP4_MACH_CRED:
7033 args.state_protect = nfs4_sp4_mach_cred_request;
7034 break;
7035
7036 default:
7037 /* unsupported! */
7038 WARN_ON_ONCE(1);
7039 status = -EINVAL;
6b55970b 7040 goto out_impl_id;
2031cd1a
WAA		 7041 }
7042
1bd714f2 7043 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7044 trace_nfs4_exchange_id(clp, status);
177313f1 7045 if (status == 0)
32b01310 7046 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7047
2031cd1a
WAA		 7048 if (status == 0)
7049 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7050
acdeb69d 7051 if (status == 0) {
32b01310 7052 clp->cl_clientid = res.clientid;
e11259f9
TM		 7053 clp->cl_exchange_flags = res.flags;
7054 /* Client ID is not confirmed */
7055 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7056 clear_bit(NFS4_SESSION_ESTABLISHED,
7057 &clp->cl_session->session_state);
32b01310 7058 clp->cl_seqid = res.seqid;
e11259f9 7059 }
32b01310 7060
acdeb69d
CL		 7061 kfree(clp->cl_serverowner);
7062 clp->cl_serverowner = res.server_owner;
7063 res.server_owner = NULL;
78fe0f41 7064
7d2ed9ac 7065 /* use the most recent implementation id */
59155546
CL		 7066 kfree(clp->cl_implid);
7067 clp->cl_implid = res.impl_id;
6b55970b 7068 res.impl_id = NULL;
7d2ed9ac 7069
177313f1 7070 if (clp->cl_serverscope != NULL &&
79d4e1f0 7071 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7072 res.server_scope)) {
7073 dprintk("%s: server_scope mismatch detected\n",
7074 __func__);
7075 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7076 kfree(clp->cl_serverscope);
7077 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7078 }
7079
177313f1 7080 if (clp->cl_serverscope == NULL) {
79d4e1f0 7081 clp->cl_serverscope = res.server_scope;
6b55970b 7082 res.server_scope = NULL;
abe9a6d5 7083 }
6b55970b 7084 }
7d2ed9ac 7085
6b55970b
KM		 7086out_impl_id:
7087 kfree(res.impl_id);
7d2ed9ac 7088out_server_scope:
abe9a6d5 7089 kfree(res.server_scope);
6b55970b
KM		 7090out_server_owner:
7091 kfree(res.server_owner);
abe9a6d5 7092out:
177313f1 7093 if (clp->cl_implid != NULL)
6bbb4ae8 7094 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7095 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7096 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7097 clp->cl_implid->date.seconds,
7098 clp->cl_implid->date.nseconds);
6bbb4ae8 7099 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7100 return status;
7101}
7102
2031cd1a
WAA		 7103/*
7104 * nfs4_proc_exchange_id()
7105 *
7106 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7107 *
7108 * Since the clientid has expired, all compounds using sessions
7109 * associated with the stale clientid will be returning
7110 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7111 * be in some phase of session reset.
7112 *
7113 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7114 */
7115int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7116{
7117 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7118 int status;
7119
7120 /* try SP4_MACH_CRED if krb5i/p */
7121 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7122 authflavor == RPC_AUTH_GSS_KRB5P) {
7123 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7124 if (!status)
7125 return 0;
7126 }
7127
7128 /* try SP4_NONE */
7129 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7130}
7131
66245539
TM		 7132static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7133 struct rpc_cred *cred)
7134{
7135 struct rpc_message msg = {
7136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7137 .rpc_argp = clp,
7138 .rpc_cred = cred,
7139 };
7140 int status;
7141
7142 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7143 trace_nfs4_destroy_clientid(clp, status);
66245539 7144 if (status)
02c67525 7145 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7146 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7147 return status;
7148}
7149
7150static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7151 struct rpc_cred *cred)
7152{
7153 unsigned int loop;
7154 int ret;
7155
7156 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7157 ret = _nfs4_proc_destroy_clientid(clp, cred);
7158 switch (ret) {
7159 case -NFS4ERR_DELAY:
7160 case -NFS4ERR_CLIENTID_BUSY:
7161 ssleep(1);
7162 break;
7163 default:
7164 return ret;
7165 }
7166 }
7167 return 0;
7168}
7169
7170int nfs4_destroy_clientid(struct nfs_client *clp)
7171{
7172 struct rpc_cred *cred;
7173 int ret = 0;
7174
7175 if (clp->cl_mvops->minor_version < 1)
7176 goto out;
7177 if (clp->cl_exchange_flags == 0)
7178 goto out;
05f4c350
CL		 7179 if (clp->cl_preserve_clid)
7180 goto out;
73d8bde5 7181 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7182 ret = nfs4_proc_destroy_clientid(clp, cred);
7183 if (cred)
7184 put_rpccred(cred);
7185 switch (ret) {
7186 case 0:
7187 case -NFS4ERR_STALE_CLIENTID:
7188 clp->cl_exchange_flags = 0;
7189 }
7190out:
7191 return ret;
7192}
7193
2050f0cc
AA		 7194struct nfs4_get_lease_time_data {
7195 struct nfs4_get_lease_time_args *args;
7196 struct nfs4_get_lease_time_res *res;
7197 struct nfs_client *clp;
7198};
7199
7200static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7201 void *calldata)
7202{
2050f0cc
AA		 7203 struct nfs4_get_lease_time_data *data =
7204 (struct nfs4_get_lease_time_data *)calldata;
7205
7206 dprintk("--> %s\n", __func__);
7207 /* just setup sequence, do not trigger session recovery
7208 since we're invoked within one */
d9afbd1b
TM		 7209 nfs41_setup_sequence(data->clp->cl_session,
7210 &data->args->la_seq_args,
7211 &data->res->lr_seq_res,
7212 task);
2050f0cc
AA		 7213 dprintk("<-- %s\n", __func__);
7214}
7215
7216/*
7217 * Called from nfs4_state_manager thread for session setup, so don't recover
7218 * from sequence operation or clientid errors.
7219 */
7220static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7221{
7222 struct nfs4_get_lease_time_data *data =
7223 (struct nfs4_get_lease_time_data *)calldata;
7224
7225 dprintk("--> %s\n", __func__);
14516c3a
TM		 7226 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7227 return;
2050f0cc
AA		 7228 switch (task->tk_status) {
7229 case -NFS4ERR_DELAY:
7230 case -NFS4ERR_GRACE:
7231 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7232 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7233 task->tk_status = 0;
a8a4ae3a
AA		 7234 /* fall through */
7235 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7236 rpc_restart_call_prepare(task);
2050f0cc
AA		 7237 return;
7238 }
2050f0cc
AA		 7239 dprintk("<-- %s\n", __func__);
7240}
7241
17280175 7242static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7243 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7244 .rpc_call_done = nfs4_get_lease_time_done,
7245};
7246
7247int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7248{
7249 struct rpc_task *task;
7250 struct nfs4_get_lease_time_args args;
7251 struct nfs4_get_lease_time_res res = {
7252 .lr_fsinfo = fsinfo,
7253 };
7254 struct nfs4_get_lease_time_data data = {
7255 .args = &args,
7256 .res = &res,
7257 .clp = clp,
7258 };
7259 struct rpc_message msg = {
7260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7261 .rpc_argp = &args,
7262 .rpc_resp = &res,
7263 };
7264 struct rpc_task_setup task_setup = {
7265 .rpc_client = clp->cl_rpcclient,
7266 .rpc_message = &msg,
7267 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7268 .callback_data = &data,
7269 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7270 };
7271 int status;
7272
a9c92d6b 7273 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7274 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7275 dprintk("--> %s\n", __func__);
7276 task = rpc_run_task(&task_setup);
7277
7278 if (IS_ERR(task))
7279 status = PTR_ERR(task);
7280 else {
7281 status = task->tk_status;
7282 rpc_put_task(task);
7283 }
7284 dprintk("<-- %s return %d\n", __func__, status);
7285
7286 return status;
7287}
7288
fc931582
AA		 7289/*
7290 * Initialize the values to be used by the client in CREATE_SESSION
7291 * If nfs4_init_session set the fore channel request and response sizes,
7292 * use them.
7293 *
7294 * Set the back channel max_resp_sz_cached to zero to force the client to
7295 * always set csa_cachethis to FALSE because the current implementation
7296 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7297 */
7298static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7299{
18aad3d5
AA		 7300 unsigned int max_rqst_sz, max_resp_sz;
7301
7302 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7303 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7304
fc931582 7305 /* Fore channel attributes */
18aad3d5
AA		 7306 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7307 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7308 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7309 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7310
7311 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7312 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7313 __func__,
7314 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7315 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7316
7317 /* Back channel attributes */
fc931582
AA		 7318 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7319 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7320 args->bc_attrs.max_resp_sz_cached = 0;
7321 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7322 args->bc_attrs.max_reqs = 1;
7323
7324 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7325 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7326 __func__,
7327 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7328 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7329 args->bc_attrs.max_reqs);
7330}
7331
79969dd1
TM		 7332static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7333 struct nfs41_create_session_res *res)
8d35301d 7334{
43c2e885 7335 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7336 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7337
43c2e885
BF		 7338 if (rcvd->max_resp_sz > sent->max_resp_sz)
7339 return -EINVAL;
7340 /*
7341 * Our requested max_ops is the minimum we need; we're not
7342 * prepared to break up compounds into smaller pieces than that.
7343 * So, no point even trying to continue if the server won't
7344 * cooperate:
7345 */
7346 if (rcvd->max_ops < sent->max_ops)
7347 return -EINVAL;
7348 if (rcvd->max_reqs == 0)
7349 return -EINVAL;
b4b9a0c1
VG		 7350 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7351 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7352 return 0;
8d35301d
AA		 7353}
7354
79969dd1
TM		 7355static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7356 struct nfs41_create_session_res *res)
43c2e885
BF		 7357{
7358 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7359 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7360
b1c0df5f
TM		 7361 if (!(res->flags & SESSION4_BACK_CHAN))
7362 goto out;
43c2e885
BF		 7363 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7364 return -EINVAL;
7365 if (rcvd->max_resp_sz < sent->max_resp_sz)
7366 return -EINVAL;
7367 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7368 return -EINVAL;
7369 /* These would render the backchannel useless: */
b4b9a0c1 7370 if (rcvd->max_ops != sent->max_ops)
43c2e885 7371 return -EINVAL;
b4b9a0c1 7372 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7373 return -EINVAL;
b1c0df5f 7374out:
43c2e885
BF		 7375 return 0;
7376}
8d35301d 7377
8d35301d 7378static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7379 struct nfs41_create_session_res *res)
8d35301d 7380{
43c2e885 7381 int ret;
8d35301d 7382
79969dd1 7383 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7384 if (ret)
7385 return ret;
79969dd1
TM		 7386 return nfs4_verify_back_channel_attrs(args, res);
7387}
7388
7389static void nfs4_update_session(struct nfs4_session *session,
7390 struct nfs41_create_session_res *res)
7391{
7392 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7393 /* Mark client id and session as being confirmed */
7394 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7395 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7396 session->flags = res->flags;
7397 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7398 if (res->flags & SESSION4_BACK_CHAN)
7399 memcpy(&session->bc_attrs, &res->bc_attrs,
7400 sizeof(session->bc_attrs));
8d35301d
AA		 7401}
7402
848f5bda
TM		 7403static int _nfs4_proc_create_session(struct nfs_client *clp,
7404 struct rpc_cred *cred)
fc931582
AA		 7405{
7406 struct nfs4_session *session = clp->cl_session;
7407 struct nfs41_create_session_args args = {
7408 .client = clp,
79969dd1
TM		 7409 .clientid = clp->cl_clientid,
7410 .seqid = clp->cl_seqid,
fc931582
AA		 7411 .cb_program = NFS4_CALLBACK,
7412 };
79969dd1
TM		 7413 struct nfs41_create_session_res res;
7414
fc931582
AA		 7415 struct rpc_message msg = {
7416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7417 .rpc_argp = &args,
7418 .rpc_resp = &res,
848f5bda 7419 .rpc_cred = cred,
fc931582
AA		 7420 };
7421 int status;
7422
7423 nfs4_init_channel_attrs(&args);
0f91421e 7424 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7425
1bd714f2 7426 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7427 trace_nfs4_create_session(clp, status);
fc931582 7428
43095d39 7429 if (!status) {
8d35301d 7430 /* Verify the session's negotiated channel_attrs values */
79969dd1 7431 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7432 /* Increment the clientid slot sequence id */
79969dd1
TM		 7433 if (clp->cl_seqid == res.seqid)
7434 clp->cl_seqid++;
7435 if (status)
7436 goto out;
7437 nfs4_update_session(session, &res);
fc931582 7438 }
79969dd1 7439out:
fc931582
AA		 7440 return status;
7441}
7442
7443/*
7444 * Issues a CREATE_SESSION operation to the server.
7445 * It is the responsibility of the caller to verify the session is
7446 * expired before calling this routine.
7447 */
848f5bda 7448int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7449{
7450 int status;
7451 unsigned *ptr;
fc931582
AA		 7452 struct nfs4_session *session = clp->cl_session;
7453
7454 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7455
848f5bda 7456 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7457 if (status)
7458 goto out;
7459
aacd5537
AA		 7460 /* Init or reset the session slot tables */
7461 status = nfs4_setup_session_slot_tables(session);
7462 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7463 if (status)
7464 goto out;
7465
7466 ptr = (unsigned *)&session->sess_id.data[0];
7467 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7468 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7469out:
7470 dprintk("<-- %s\n", __func__);
7471 return status;
7472}
7473
0f3e66c6
AA		 7474/*
7475 * Issue the over-the-wire RPC DESTROY_SESSION.
7476 * The caller must serialize access to this routine.
7477 */
848f5bda
TM		 7478int nfs4_proc_destroy_session(struct nfs4_session *session,
7479 struct rpc_cred *cred)
0f3e66c6 7480{
848f5bda
TM		 7481 struct rpc_message msg = {
7482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7483 .rpc_argp = session,
7484 .rpc_cred = cred,
7485 };
0f3e66c6 7486 int status = 0;
0f3e66c6
AA		 7487
7488 dprintk("--> nfs4_proc_destroy_session\n");
7489
7490 /* session is still being setup */
e11259f9
TM		 7491 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7492 return 0;
0f3e66c6 7493
1bd714f2 7494 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7495 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7496
7497 if (status)
08106ac7 7498 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7499 "Session has been destroyed regardless...\n", status);
7500
7501 dprintk("<-- nfs4_proc_destroy_session\n");
7502 return status;
7503}
7504
fc01cea9
AA		 7505/*
7506 * Renew the cl_session lease.
7507 */
d5f8d3fe
TM		 7508struct nfs4_sequence_data {
7509 struct nfs_client *clp;
7510 struct nfs4_sequence_args args;
7511 struct nfs4_sequence_res res;
7512};
7513
dc96aef9
AB		 7514static void nfs41_sequence_release(void *data)
7515{
d5f8d3fe
TM		 7516 struct nfs4_sequence_data *calldata = data;
7517 struct nfs_client *clp = calldata->clp;
dc96aef9 7518
7135840f
AB		 7519 if (atomic_read(&clp->cl_count) > 1)
7520 nfs4_schedule_state_renewal(clp);
7521 nfs_put_client(clp);
d5f8d3fe 7522 kfree(calldata);
dc96aef9
AB		 7523}
7524
aa5190d0
TM		 7525static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7526{
7527 switch(task->tk_status) {
7528 case -NFS4ERR_DELAY:
aa5190d0
TM		 7529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7530 return -EAGAIN;
7531 default:
0400a6b0 7532 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7533 }
7534 return 0;
7535}
7536
dc96aef9 7537static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7538{
d5f8d3fe
TM		 7539 struct nfs4_sequence_data *calldata = data;
7540 struct nfs_client *clp = calldata->clp;
fc01cea9 7541
14516c3a
TM		 7542 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7543 return;
fc01cea9 7544
c6d01c6f 7545 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7546 if (task->tk_status < 0) {
7547 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7548 if (atomic_read(&clp->cl_count) == 1)
7549 goto out;
fc01cea9 7550
aa5190d0
TM		 7551 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7552 rpc_restart_call_prepare(task);
fc01cea9
AA		 7553 return;
7554 }
7555 }
fc01cea9 7556 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7557out:
fc01cea9
AA		 7558 dprintk("<-- %s\n", __func__);
7559}
7560
7561static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7562{
d5f8d3fe
TM		 7563 struct nfs4_sequence_data *calldata = data;
7564 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7565 struct nfs4_sequence_args *args;
7566 struct nfs4_sequence_res *res;
7567
fc01cea9
AA		 7568 args = task->tk_msg.rpc_argp;
7569 res = task->tk_msg.rpc_resp;
7570
d9afbd1b 7571 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7572}
7573
7574static const struct rpc_call_ops nfs41_sequence_ops = {
7575 .rpc_call_done = nfs41_sequence_call_done,
7576 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7577 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7578};
7579
8fe72bac
TM		 7580static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7581 struct rpc_cred *cred,
7582 bool is_privileged)
fc01cea9 7583{
d5f8d3fe 7584 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7585 struct rpc_message msg = {
7586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7587 .rpc_cred = cred,
7588 };
71ac6da9
TM		 7589 struct rpc_task_setup task_setup_data = {
7590 .rpc_client = clp->cl_rpcclient,
7591 .rpc_message = &msg,
8fe72bac 7592 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7593 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7594 };
fc01cea9 7595
7135840f 7596 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7597 return ERR_PTR(-EIO);
dfb4f309 7598 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7599 if (calldata == NULL) {
7135840f 7600 nfs_put_client(clp);
71ac6da9 7601 return ERR_PTR(-ENOMEM);
fc01cea9 7602 }
a9c92d6b 7603 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7604 if (is_privileged)
7605 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7606 msg.rpc_argp = &calldata->args;
7607 msg.rpc_resp = &calldata->res;
7608 calldata->clp = clp;
71ac6da9 7609 task_setup_data.callback_data = calldata;
fc01cea9 7610
71ac6da9
TM		 7611 return rpc_run_task(&task_setup_data);
7612}
7613
2f60ea6b 7614static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7615{
7616 struct rpc_task *task;
7617 int ret = 0;
7618
2f60ea6b 7619 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7620 return -EAGAIN;
8fe72bac 7621 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7622 if (IS_ERR(task))
7623 ret = PTR_ERR(task);
7624 else
bf294b41 7625 rpc_put_task_async(task);
71ac6da9
TM		 7626 dprintk("<-- %s status=%d\n", __func__, ret);
7627 return ret;
7628}
7629
7630static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7631{
7632 struct rpc_task *task;
7633 int ret;
7634
8fe72bac 7635 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7636 if (IS_ERR(task)) {
7637 ret = PTR_ERR(task);
7638 goto out;
7639 }
7640 ret = rpc_wait_for_completion_task(task);
be824167 7641 if (!ret)
71ac6da9
TM		 7642 ret = task->tk_status;
7643 rpc_put_task(task);
7644out:
7645 dprintk("<-- %s status=%d\n", __func__, ret);
7646 return ret;
fc01cea9
AA		 7647}
7648
fce5c838
RL		 7649struct nfs4_reclaim_complete_data {
7650 struct nfs_client *clp;
7651 struct nfs41_reclaim_complete_args arg;
7652 struct nfs41_reclaim_complete_res res;
7653};
7654
7655static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7656{
7657 struct nfs4_reclaim_complete_data *calldata = data;
7658
d9afbd1b
TM		 7659 nfs41_setup_sequence(calldata->clp->cl_session,
7660 &calldata->arg.seq_args,
7661 &calldata->res.seq_res,
7662 task);
fce5c838
RL		 7663}
7664
aa5190d0
TM		 7665static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7666{
7667 switch(task->tk_status) {
7668 case 0:
7669 case -NFS4ERR_COMPLETE_ALREADY:
7670 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7671 break;
7672 case -NFS4ERR_DELAY:
aa5190d0 7673 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7674 /* fall through */
7675 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7676 return -EAGAIN;
7677 default:
0400a6b0 7678 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7679 }
7680 return 0;
7681}
7682
fce5c838
RL		 7683static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7684{
7685 struct nfs4_reclaim_complete_data *calldata = data;
7686 struct nfs_client *clp = calldata->clp;
7687 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7688
7689 dprintk("--> %s\n", __func__);
14516c3a
TM		 7690 if (!nfs41_sequence_done(task, res))
7691 return;
fce5c838 7692
c6d01c6f 7693 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7694 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7695 rpc_restart_call_prepare(task);
7696 return;
7697 }
fce5c838
RL		 7698 dprintk("<-- %s\n", __func__);
7699}
7700
7701static void nfs4_free_reclaim_complete_data(void *data)
7702{
7703 struct nfs4_reclaim_complete_data *calldata = data;
7704
7705 kfree(calldata);
7706}
7707
7708static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7709 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7710 .rpc_call_done = nfs4_reclaim_complete_done,
7711 .rpc_release = nfs4_free_reclaim_complete_data,
7712};
7713
7714/*
7715 * Issue a global reclaim complete.
7716 */
965e9c23
TM		 7717static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7718 struct rpc_cred *cred)
fce5c838
RL		 7719{
7720 struct nfs4_reclaim_complete_data *calldata;
7721 struct rpc_task *task;
7722 struct rpc_message msg = {
7723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7724 .rpc_cred = cred,
fce5c838
RL		 7725 };
7726 struct rpc_task_setup task_setup_data = {
7727 .rpc_client = clp->cl_rpcclient,
7728 .rpc_message = &msg,
7729 .callback_ops = &nfs4_reclaim_complete_call_ops,
7730 .flags = RPC_TASK_ASYNC,
7731 };
7732 int status = -ENOMEM;
7733
7734 dprintk("--> %s\n", __func__);
8535b2be 7735 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7736 if (calldata == NULL)
7737 goto out;
7738 calldata->clp = clp;
7739 calldata->arg.one_fs = 0;
fce5c838 7740
a9c92d6b 7741 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7742 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7743 msg.rpc_argp = &calldata->arg;
7744 msg.rpc_resp = &calldata->res;
7745 task_setup_data.callback_data = calldata;
7746 task = rpc_run_task(&task_setup_data);
acf82b85 7747 if (IS_ERR(task)) {
fce5c838 7748 status = PTR_ERR(task);
acf82b85
DC		 7749 goto out;
7750 }
c34c32ea
AA		 7751 status = nfs4_wait_for_completion_rpc_task(task);
7752 if (status == 0)
7753 status = task->tk_status;
fce5c838 7754 rpc_put_task(task);
acf82b85 7755 return 0;
fce5c838
RL		 7756out:
7757 dprintk("<-- %s status=%d\n", __func__, status);
7758 return status;
7759}
b1f69b75
AA		 7760
7761static void
7762nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7763{
7764 struct nfs4_layoutget *lgp = calldata;
c31663d4 7765 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7766 struct nfs4_session *session = nfs4_get_session(server);
ab7d763e 7767 int ret;
b1f69b75
AA		 7768
7769 dprintk("--> %s\n", __func__);
c31663d4
FI		 7770 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7771 * right now covering the LAYOUTGET we are about to send.
7772 * However, that is not so catastrophic, and there seems
7773 * to be no way to prevent it completely.
7774 */
6ba7db34 7775 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7776 &lgp->res.seq_res, task))
b1f69b75 7777 return;
ab7d763e 7778 ret = pnfs_choose_layoutget_stateid(&lgp->args.stateid,
cf7d63f1 7779 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7780 &lgp->args.range,
ab7d763e
TM		 7781 lgp->args.ctx->state);
7782 if (ret < 0)
7783 rpc_exit(task, ret);
b1f69b75
AA		 7784}
7785
7786static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7787{
7788 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7789 struct inode *inode = lgp->args.inode;
7790 struct nfs_server *server = NFS_SERVER(inode);
7791 struct pnfs_layout_hdr *lo;
7792 struct nfs4_state *state = NULL;
ed7e5423 7793 unsigned long timeo, now, giveup;
b1f69b75 7794
ed7e5423 7795 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7796
6ba7db34 7797 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7798 goto out;
b1f69b75
AA		 7799
7800 switch (task->tk_status) {
7801 case 0:
ee314c2a 7802 goto out;
7c1e6e58
PT		 7803
7804 /*
7805 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7806 * on the file. set tk_status to -ENODATA to tell upper layer to
7807 * retry go inband.
7808 */
7809 case -NFS4ERR_LAYOUTUNAVAILABLE:
7810 task->tk_status = -ENODATA;
7811 goto out;
21b874c8
TM		 7812 /*
7813 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7814 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7815 */
7816 case -NFS4ERR_BADLAYOUT:
7817 goto out_overflow;
ed7e5423
BH		 7818 /*
7819 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7820 * (or clients) writing to the same RAID stripe except when
7821 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7822 */
b1f69b75 7823 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7824 if (lgp->args.minlength == 0)
7825 goto out_overflow;
ed7e5423
BH		 7826 /*
7827 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7828 * existing layout before getting a new one).
7829 */
b1f69b75 7830 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7831 timeo = rpc_get_timeout(task->tk_client);
7832 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7833 now = jiffies;
7834 if (time_after(giveup, now)) {
7835 unsigned long delay;
7836
7837 /* Delay for:
7838 * - Not less then NFS4_POLL_RETRY_MIN.
7839 * - One last time a jiffie before we give up
7840 * - exponential backoff (time_now minus start_attempt)
7841 */
7842 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7843 min((giveup - now - 1),
7844 now - lgp->args.timestamp));
7845
7846 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7847 __func__, delay);
7848 rpc_delay(task, delay);
2259f960
TM		 7849 /* Do not call nfs4_async_handle_error() */
7850 goto out_restart;
ed7e5423 7851 }
ee314c2a
TM		 7852 break;
7853 case -NFS4ERR_EXPIRED:
7854 case -NFS4ERR_BAD_STATEID:
7855 spin_lock(&inode->i_lock);
2259f960
TM		 7856 if (nfs4_stateid_match(&lgp->args.stateid,
7857 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7858 spin_unlock(&inode->i_lock);
7859 /* If the open stateid was bad, then recover it. */
7860 state = lgp->args.ctx->state;
2259f960
TM		 7861 break;
7862 }
7863 lo = NFS_I(inode)->layout;
7864 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7865 &lo->plh_stateid)) {
ee314c2a
TM		 7866 LIST_HEAD(head);
7867
defb8460
CH		 7868 /*
7869 * Mark the bad layout state as invalid, then retry
7870 * with the current stateid.
7871 */
8714d46d 7872 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7873 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7874 spin_unlock(&inode->i_lock);
ee314c2a 7875 pnfs_free_lseg_list(&head);
2259f960
TM		 7876 } else
7877 spin_unlock(&inode->i_lock);
7878 goto out_restart;
b1f69b75 7879 }
91ab4b4d 7880 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
2259f960 7881 goto out_restart;
ee314c2a 7882out:
b1f69b75 7883 dprintk("<-- %s\n", __func__);
21b874c8 7884 return;
2259f960
TM		 7885out_restart:
7886 task->tk_status = 0;
7887 rpc_restart_call_prepare(task);
7888 return;
21b874c8
TM		 7889out_overflow:
7890 task->tk_status = -EOVERFLOW;
7891 goto out;
b1f69b75
AA		 7892}
7893
8554116e
IK		 7894static size_t max_response_pages(struct nfs_server *server)
7895{
7896 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7897 return nfs_page_array_len(0, max_resp_sz);
7898}
7899
7900static void nfs4_free_pages(struct page **pages, size_t size)
7901{
7902 int i;
7903
7904 if (!pages)
7905 return;
7906
7907 for (i = 0; i < size; i++) {
7908 if (!pages[i])
7909 break;
7910 __free_page(pages[i]);
7911 }
7912 kfree(pages);
7913}
7914
7915static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7916{
7917 struct page **pages;
7918 int i;
7919
7920 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7921 if (!pages) {
7922 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7923 return NULL;
7924 }
7925
7926 for (i = 0; i < size; i++) {
7927 pages[i] = alloc_page(gfp_flags);
7928 if (!pages[i]) {
7929 dprintk("%s: failed to allocate page\n", __func__);
7930 nfs4_free_pages(pages, size);
7931 return NULL;
7932 }
7933 }
7934
7935 return pages;
7936}
7937
b1f69b75
AA		 7938static void nfs4_layoutget_release(void *calldata)
7939{
7940 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7941 struct inode *inode = lgp->args.inode;
7942 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7943 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7944
7945 dprintk("--> %s\n", __func__);
8554116e 7946 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7947 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7948 put_nfs_open_context(lgp->args.ctx);
7949 kfree(calldata);
7950 dprintk("<-- %s\n", __func__);
7951}
7952
7953static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7954 .rpc_call_prepare = nfs4_layoutget_prepare,
7955 .rpc_call_done = nfs4_layoutget_done,
7956 .rpc_release = nfs4_layoutget_release,
7957};
7958
a0b0a6e3
TM		 7959struct pnfs_layout_segment *
7960nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7961{
a47970ff
WAA		 7962 struct inode *inode = lgp->args.inode;
7963 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7964 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7965 struct rpc_task *task;
7966 struct rpc_message msg = {
7967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7968 .rpc_argp = &lgp->args,
7969 .rpc_resp = &lgp->res,
6ab59344 7970 .rpc_cred = lgp->cred,
b1f69b75
AA		 7971 };
7972 struct rpc_task_setup task_setup_data = {
7973 .rpc_client = server->client,
7974 .rpc_message = &msg,
7975 .callback_ops = &nfs4_layoutget_call_ops,
7976 .callback_data = lgp,
7977 .flags = RPC_TASK_ASYNC,
7978 };
a0b0a6e3 7979 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7980 int status = 0;
7981
7982 dprintk("--> %s\n", __func__);
7983
4bd5a980
PT		 7984 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7985 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7986
8554116e
IK		 7987 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7988 if (!lgp->args.layout.pages) {
7989 nfs4_layoutget_release(lgp);
a0b0a6e3 7990 return ERR_PTR(-ENOMEM);
8554116e
IK		 7991 }
7992 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7993 lgp->args.timestamp = jiffies;
8554116e 7994
35124a09 7995 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7996 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7997 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7998
b1f69b75
AA		 7999 task = rpc_run_task(&task_setup_data);
8000 if (IS_ERR(task))
a0b0a6e3 8001 return ERR_CAST(task);
b1f69b75 8002 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 8003 if (status == 0)
8004 status = task->tk_status;
1037e6ea
TM		 8005 trace_nfs4_layoutget(lgp->args.ctx,
8006 &lgp->args.range,
8007 &lgp->res.range,
48c9579a 8008 &lgp->res.stateid,
1037e6ea 8009 status);
085b7a45
WAA		 8010 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8011 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8012 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8013 rpc_put_task(task);
8014 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8015 if (status)
8016 return ERR_PTR(status);
8017 return lseg;
b1f69b75
AA		 8018}
8019
cbe82603
BH		 8020static void
8021nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8022{
8023 struct nfs4_layoutreturn *lrp = calldata;
8024
8025 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8026 nfs41_setup_sequence(lrp->clp->cl_session,
8027 &lrp->args.seq_args,
8028 &lrp->res.seq_res,
8029 task);
cbe82603
BH		 8030}
8031
8032static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8033{
8034 struct nfs4_layoutreturn *lrp = calldata;
8035 struct nfs_server *server;
8036
8037 dprintk("--> %s\n", __func__);
8038
6ba7db34 8039 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8040 return;
8041
8042 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8043 switch (task->tk_status) {
8044 default:
8045 task->tk_status = 0;
8046 case 0:
8047 break;
8048 case -NFS4ERR_DELAY:
8478eaa1 8049 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8050 break;
d00c5d43 8051 rpc_restart_call_prepare(task);
cbe82603
BH		 8052 return;
8053 }
cbe82603
BH		 8054 dprintk("<-- %s\n", __func__);
8055}
8056
8057static void nfs4_layoutreturn_release(void *calldata)
8058{
8059 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8060 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8061 LIST_HEAD(freeme);
cbe82603
BH		 8062
8063 dprintk("--> %s\n", __func__);
849b286f 8064 spin_lock(&lo->plh_inode->i_lock);
0654cc72
TM		 8065 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8066 pnfs_mark_layout_returned_if_empty(lo);
849b286f
TM		 8067 if (lrp->res.lrs_present)
8068 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 8069 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8070 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8071 pnfs_free_lseg_list(&freeme);
70c3bd2b 8072 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8073 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8074 kfree(calldata);
8075 dprintk("<-- %s\n", __func__);
8076}
8077
8078static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8079 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8080 .rpc_call_done = nfs4_layoutreturn_done,
8081 .rpc_release = nfs4_layoutreturn_release,
8082};
8083
6c16605d 8084int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8085{
8086 struct rpc_task *task;
8087 struct rpc_message msg = {
8088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8089 .rpc_argp = &lrp->args,
8090 .rpc_resp = &lrp->res,
9556000d 8091 .rpc_cred = lrp->cred,
cbe82603
BH		 8092 };
8093 struct rpc_task_setup task_setup_data = {
1771c577 8094 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8095 .rpc_message = &msg,
8096 .callback_ops = &nfs4_layoutreturn_call_ops,
8097 .callback_data = lrp,
8098 };
6c16605d 8099 int status = 0;
cbe82603 8100
99ade3c7
AE		 8101 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8102 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8103 &task_setup_data.rpc_client, &msg);
8104
cbe82603 8105 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8106 if (!sync) {
8107 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8108 if (!lrp->inode) {
8109 nfs4_layoutreturn_release(lrp);
8110 return -EAGAIN;
8111 }
8112 task_setup_data.flags |= RPC_TASK_ASYNC;
8113 }
a9c92d6b 8114 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8115 task = rpc_run_task(&task_setup_data);
8116 if (IS_ERR(task))
8117 return PTR_ERR(task);
5a0ec8ac
TM		 8118 if (sync)
8119 status = task->tk_status;
48c9579a 8120 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8121 dprintk("<-- %s status=%d\n", __func__, status);
8122 rpc_put_task(task);
8123 return status;
8124}
8125
b1f69b75 8126static int
cd5875fe
TM		 8127_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8128 struct pnfs_device *pdev,
8129 struct rpc_cred *cred)
b1f69b75
AA		 8130{
8131 struct nfs4_getdeviceinfo_args args = {
8132 .pdev = pdev,
4e590803
TM		 8133 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8134 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8135 };
8136 struct nfs4_getdeviceinfo_res res = {
8137 .pdev = pdev,
8138 };
8139 struct rpc_message msg = {
8140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8141 .rpc_argp = &args,
8142 .rpc_resp = &res,
cd5875fe 8143 .rpc_cred = cred,
b1f69b75
AA		 8144 };
8145 int status;
8146
8147 dprintk("--> %s\n", __func__);
7c513058 8148 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8149 if (res.notification & ~args.notify_types)
8150 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8151 if (res.notification != args.notify_types)
8152 pdev->nocache = 1;
4e590803 8153
b1f69b75
AA		 8154 dprintk("<-- %s status=%d\n", __func__, status);
8155
8156 return status;
8157}
8158
cd5875fe
TM		 8159int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8160 struct pnfs_device *pdev,
8161 struct rpc_cred *cred)
b1f69b75
AA		 8162{
8163 struct nfs4_exception exception = { };
8164 int err;
8165
8166 do {
8167 err = nfs4_handle_exception(server,
cd5875fe 8168 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8169 &exception);
8170 } while (exception.retry);
8171 return err;
8172}
8173EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8174
863a3c6c
AA		 8175static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8176{
8177 struct nfs4_layoutcommit_data *data = calldata;
8178 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8179 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8180
d9afbd1b
TM		 8181 nfs41_setup_sequence(session,
8182 &data->args.seq_args,
8183 &data->res.seq_res,
8184 task);
863a3c6c
AA		 8185}
8186
8187static void
8188nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8189{
8190 struct nfs4_layoutcommit_data *data = calldata;
8191 struct nfs_server *server = NFS_SERVER(data->args.inode);
8192
6ba7db34 8193 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8194 return;
8195
8196 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8197 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8198 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8199 case -NFS4ERR_BADLAYOUT: /* no layout */
8200 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8201 task->tk_status = 0;
e59d27e0 8202 case 0:
e59d27e0
TM		 8203 break;
8204 default:
8478eaa1 8205 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8206 rpc_restart_call_prepare(task);
8207 return;
8208 }
8209 }
863a3c6c
AA		 8210}
8211
8212static void nfs4_layoutcommit_release(void *calldata)
8213{
8214 struct nfs4_layoutcommit_data *data = calldata;
8215
db29c089 8216 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8217 nfs_post_op_update_inode_force_wcc(data->args.inode,
8218 data->res.fattr);
863a3c6c 8219 put_rpccred(data->cred);
472e2594 8220 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8221 kfree(data);
8222}
8223
8224static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8225 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8226 .rpc_call_done = nfs4_layoutcommit_done,
8227 .rpc_release = nfs4_layoutcommit_release,
8228};
8229
8230int
ef311537 8231nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8232{
8233 struct rpc_message msg = {
8234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8235 .rpc_argp = &data->args,
8236 .rpc_resp = &data->res,
8237 .rpc_cred = data->cred,
8238 };
8239 struct rpc_task_setup task_setup_data = {
8240 .task = &data->task,
8241 .rpc_client = NFS_CLIENT(data->args.inode),
8242 .rpc_message = &msg,
8243 .callback_ops = &nfs4_layoutcommit_ops,
8244 .callback_data = data,
863a3c6c
AA		 8245 };
8246 struct rpc_task *task;
8247 int status = 0;
8248
b4839ebe
KM		 8249 dprintk("NFS: initiating layoutcommit call. sync %d "
8250 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8251 data->args.lastbytewritten,
8252 data->args.inode->i_ino);
8253
472e2594
TM		 8254 if (!sync) {
8255 data->inode = nfs_igrab_and_active(data->args.inode);
8256 if (data->inode == NULL) {
8257 nfs4_layoutcommit_release(data);
8258 return -EAGAIN;
8259 }
8260 task_setup_data.flags = RPC_TASK_ASYNC;
8261 }
a9c92d6b 8262 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8263 task = rpc_run_task(&task_setup_data);
8264 if (IS_ERR(task))
8265 return PTR_ERR(task);
472e2594
TM		 8266 if (sync)
8267 status = task->tk_status;
48c9579a 8268 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8269 dprintk("%s: status %d\n", __func__, status);
8270 rpc_put_task(task);
8271 return status;
8272}
fca78d6d 8273
97431204
AA		 8274/**
8275 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8276 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8277 */
fca78d6d
BS		 8278static int
8279_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8280 struct nfs_fsinfo *info,
8281 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8282{
8283 struct nfs41_secinfo_no_name_args args = {
8284 .style = SECINFO_STYLE_CURRENT_FH,
8285 };
8286 struct nfs4_secinfo_res res = {
8287 .flavors = flavors,
8288 };
8289 struct rpc_message msg = {
8290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8291 .rpc_argp = &args,
8292 .rpc_resp = &res,
8293 };
b1b3e136 8294 struct rpc_clnt *clnt = server->client;
7cb852df 8295 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8296 int status;
8297
8298 if (use_integrity) {
8299 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8300 cred = nfs4_get_clid_cred(server->nfs_client);
8301 msg.rpc_cred = cred;
b1b3e136
WAA		 8302 }
8303
8304 dprintk("--> %s\n", __func__);
8305 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8306 &res.seq_res, 0);
8307 dprintk("<-- %s status=%d\n", __func__, status);
8308
7cb852df
WAA		 8309 if (cred)
8310 put_rpccred(cred);
b1b3e136
WAA		 8311
8312 return status;
fca78d6d
BS		 8313}
8314
8315static int
8316nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8317 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8318{
8319 struct nfs4_exception exception = { };
8320 int err;
8321 do {
b1b3e136
WAA		 8322 /* first try using integrity protection */
8323 err = -NFS4ERR_WRONGSEC;
8324
8325 /* try to use integrity protection with machine cred */
8326 if (_nfs4_is_integrity_protected(server->nfs_client))
8327 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8328 flavors, true);
8329
8330 /*
8331 * if unable to use integrity protection, or SECINFO with
8332 * integrity protection returns NFS4ERR_WRONGSEC (which is
8333 * disallowed by spec, but exists in deployed servers) use
8334 * the current filesystem's rpc_client and the user cred.
8335 */
8336 if (err == -NFS4ERR_WRONGSEC)
8337 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8338 flavors, false);
8339
fca78d6d
BS		 8340 switch (err) {
8341 case 0:
8342 case -NFS4ERR_WRONGSEC:
78b19bae 8343 case -ENOTSUPP:
05e9cfb4 8344 goto out;
fca78d6d
BS		 8345 default:
8346 err = nfs4_handle_exception(server, err, &exception);
8347 }
8348 } while (exception.retry);
05e9cfb4 8349out:
fca78d6d
BS		 8350 return err;
8351}
8352
8353static int
8354nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8355 struct nfs_fsinfo *info)
8356{
8357 int err;
8358 struct page *page;
367156d9 8359 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8360 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8361 struct nfs4_secinfo4 *secinfo;
8362 int i;
fca78d6d
BS		 8363
8364 page = alloc_page(GFP_KERNEL);
8365 if (!page) {
8366 err = -ENOMEM;
8367 goto out;
8368 }
8369
8370 flavors = page_address(page);
8371 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8372
8373 /*
8374 * Fall back on "guess and check" method if
8375 * the server doesn't support SECINFO_NO_NAME
8376 */
78b19bae 8377 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8378 err = nfs4_find_root_sec(server, fhandle, info);
8379 goto out_freepage;
8380 }
8381 if (err)
8382 goto out_freepage;
8383
58a8cf12
WAA		 8384 for (i = 0; i < flavors->num_flavors; i++) {
8385 secinfo = &flavors->flavors[i];
8386
8387 switch (secinfo->flavor) {
8388 case RPC_AUTH_NULL:
8389 case RPC_AUTH_UNIX:
8390 case RPC_AUTH_GSS:
8391 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8392 &secinfo->flavor_info);
8393 break;
8394 default:
8395 flavor = RPC_AUTH_MAXFLAVOR;
8396 break;
8397 }
8398
4d4b69dd
WAA		 8399 if (!nfs_auth_info_match(&server->auth_info, flavor))
8400 flavor = RPC_AUTH_MAXFLAVOR;
8401
58a8cf12
WAA		 8402 if (flavor != RPC_AUTH_MAXFLAVOR) {
8403 err = nfs4_lookup_root_sec(server, fhandle,
8404 info, flavor);
8405 if (!err)
8406 break;
8407 }
8408 }
8409
8410 if (flavor == RPC_AUTH_MAXFLAVOR)
8411 err = -EPERM;
fca78d6d
BS		 8412
8413out_freepage:
8414 put_page(page);
8415 if (err == -EACCES)
8416 return -EPERM;
8417out:
8418 return err;
8419}
1cab0652 8420
ab7cb0df
TM		 8421static int _nfs41_test_stateid(struct nfs_server *server,
8422 nfs4_stateid *stateid,
8423 struct rpc_cred *cred)
7d974794
BS		 8424{
8425 int status;
8426 struct nfs41_test_stateid_args args = {
1cab0652 8427 .stateid = stateid,
7d974794
BS		 8428 };
8429 struct nfs41_test_stateid_res res;
8430 struct rpc_message msg = {
8431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8432 .rpc_argp = &args,
8433 .rpc_resp = &res,
ab7cb0df 8434 .rpc_cred = cred,
7d974794 8435 };
3787d506
WAA		 8436 struct rpc_clnt *rpc_client = server->client;
8437
8438 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8439 &rpc_client, &msg);
1cab0652 8440
38527b15 8441 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8442 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8443 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8444 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8445 &args.seq_args, &res.seq_res);
38527b15
CL		 8446 if (status != NFS_OK) {
8447 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8448 return status;
38527b15
CL		 8449 }
8450 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8451 return -res.status;
7d974794
BS		 8452}
8453
38527b15
CL		 8454/**
8455 * nfs41_test_stateid - perform a TEST_STATEID operation
8456 *
8457 * @server: server / transport on which to perform the operation
8458 * @stateid: state ID to test
ab7cb0df 8459 * @cred: credential
38527b15
CL		 8460 *
8461 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8462 * Otherwise a negative NFS4ERR value is returned if the operation
8463 * failed or the state ID is not currently valid.
8464 */
ab7cb0df
TM		 8465static int nfs41_test_stateid(struct nfs_server *server,
8466 nfs4_stateid *stateid,
8467 struct rpc_cred *cred)
7d974794
BS		 8468{
8469 struct nfs4_exception exception = { };
8470 int err;
8471 do {
ab7cb0df 8472 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8473 if (err != -NFS4ERR_DELAY)
8474 break;
8475 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8476 } while (exception.retry);
8477 return err;
8478}
9aeda35f 8479
7c1d5fae
TM		 8480struct nfs_free_stateid_data {
8481 struct nfs_server *server;
8482 struct nfs41_free_stateid_args args;
9aeda35f 8483 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8484};
8485
8486static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8487{
8488 struct nfs_free_stateid_data *data = calldata;
8489 nfs41_setup_sequence(nfs4_get_session(data->server),
8490 &data->args.seq_args,
8491 &data->res.seq_res,
8492 task);
8493}
8494
8495static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8496{
8497 struct nfs_free_stateid_data *data = calldata;
8498
8499 nfs41_sequence_done(task, &data->res.seq_res);
8500
8501 switch (task->tk_status) {
8502 case -NFS4ERR_DELAY:
8478eaa1 8503 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8504 rpc_restart_call_prepare(task);
8505 }
8506}
8507
8508static void nfs41_free_stateid_release(void *calldata)
8509{
8510 kfree(calldata);
8511}
8512
17f26b12 8513static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8514 .rpc_call_prepare = nfs41_free_stateid_prepare,
8515 .rpc_call_done = nfs41_free_stateid_done,
8516 .rpc_release = nfs41_free_stateid_release,
8517};
8518
8519static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8520 nfs4_stateid *stateid,
ab7cb0df 8521 struct rpc_cred *cred,
7c1d5fae
TM		 8522 bool privileged)
8523{
9aeda35f
BS		 8524 struct rpc_message msg = {
8525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8526 .rpc_cred = cred,
9aeda35f 8527 };
7c1d5fae
TM		 8528 struct rpc_task_setup task_setup = {
8529 .rpc_client = server->client,
8530 .rpc_message = &msg,
8531 .callback_ops = &nfs41_free_stateid_ops,
8532 .flags = RPC_TASK_ASYNC,
8533 };
8534 struct nfs_free_stateid_data *data;
9aeda35f 8535
3787d506
WAA		 8536 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8537 &task_setup.rpc_client, &msg);
8538
38527b15 8539 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8540 data = kmalloc(sizeof(*data), GFP_NOFS);
8541 if (!data)
8542 return ERR_PTR(-ENOMEM);
8543 data->server = server;
8544 nfs4_stateid_copy(&data->args.stateid, stateid);
8545
8546 task_setup.callback_data = data;
8547
8548 msg.rpc_argp = &data->args;
8549 msg.rpc_resp = &data->res;
a9c92d6b 8550 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8551 if (privileged)
8552 nfs4_set_sequence_privileged(&data->args.seq_args);
8553
8554 return rpc_run_task(&task_setup);
9aeda35f
BS		 8555}
8556
38527b15
CL		 8557/**
8558 * nfs41_free_stateid - perform a FREE_STATEID operation
8559 *
8560 * @server: server / transport on which to perform the operation
8561 * @stateid: state ID to release
ab7cb0df 8562 * @cred: credential
38527b15
CL		 8563 *
8564 * Returns NFS_OK if the server freed "stateid". Otherwise a
8565 * negative NFS4ERR value is returned.
8566 */
ab7cb0df
TM		 8567static int nfs41_free_stateid(struct nfs_server *server,
8568 nfs4_stateid *stateid,
8569 struct rpc_cred *cred)
9aeda35f 8570{
7c1d5fae
TM		 8571 struct rpc_task *task;
8572 int ret;
8573
ab7cb0df 8574 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8575 if (IS_ERR(task))
8576 return PTR_ERR(task);
8577 ret = rpc_wait_for_completion_task(task);
8578 if (!ret)
8579 ret = task->tk_status;
8580 rpc_put_task(task);
8581 return ret;
9aeda35f 8582}
36281caa 8583
f1cdae87
JL		 8584static void
8585nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8586{
8587 struct rpc_task *task;
ab7cb0df 8588 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8589
ab7cb0df 8590 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8591 nfs4_free_lock_state(server, lsp);
8592 if (IS_ERR(task))
f1cdae87 8593 return;
c8b2d0bf 8594 rpc_put_task(task);
c8b2d0bf
TM		 8595}
8596
36281caa
TM		 8597static bool nfs41_match_stateid(const nfs4_stateid *s1,
8598 const nfs4_stateid *s2)
8599{
2d2f24ad 8600 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8601 return false;
8602
2d2f24ad 8603 if (s1->seqid == s2->seqid)
36281caa 8604 return true;
2d2f24ad 8605 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8606 return true;
8607
8608 return false;
8609}
8610
557134a3
AA		 8611#endif /* CONFIG_NFS_V4_1 */
8612
36281caa
TM		 8613static bool nfs4_match_stateid(const nfs4_stateid *s1,
8614 const nfs4_stateid *s2)
8615{
f597c537 8616 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8617}
8618
8619
17280175 8620static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8621 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8622 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8623 .recover_open = nfs4_open_reclaim,
8624 .recover_lock = nfs4_lock_reclaim,
591d71cb 8625 .establish_clid = nfs4_init_clientid,
05f4c350 8626 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8627};
8628
591d71cb 8629#if defined(CONFIG_NFS_V4_1)
17280175 8630static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8631 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8632 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8633 .recover_open = nfs4_open_reclaim,
8634 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8635 .establish_clid = nfs41_init_clientid,
fce5c838 8636 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8637 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8638};
8639#endif /* CONFIG_NFS_V4_1 */
8640
17280175 8641static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8642 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8643 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8644 .recover_open = nfs40_open_expired,
591d71cb
AA		 8645 .recover_lock = nfs4_lock_expired,
8646 .establish_clid = nfs4_init_clientid,
8647};
8648
8649#if defined(CONFIG_NFS_V4_1)
17280175 8650static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8651 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8652 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8653 .recover_open = nfs41_open_expired,
8654 .recover_lock = nfs41_lock_expired,
4d643d1d 8655 .establish_clid = nfs41_init_clientid,
1da177e4 8656};
591d71cb 8657#endif /* CONFIG_NFS_V4_1 */
1da177e4 8658
17280175 8659static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8660 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8661 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8662 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8663};
8664
8665#if defined(CONFIG_NFS_V4_1)
17280175 8666static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8667 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8668 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8669 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8670};
8671#endif
8672
ec011fe8 8673static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8674 .get_locations = _nfs40_proc_get_locations,
44c99933 8675 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8676};
8677
8678#if defined(CONFIG_NFS_V4_1)
8679static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8680 .get_locations = _nfs41_proc_get_locations,
44c99933 8681 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8682};
8683#endif /* CONFIG_NFS_V4_1 */
8684
97dc1359
TM		 8685static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8686 .minor_version = 0,
39c6daae
TM		 8687 .init_caps = NFS_CAP_READDIRPLUS
8688 | NFS_CAP_ATOMIC_OPEN
39c6daae 8689 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8690 .init_client = nfs40_init_client,
8691 .shutdown_client = nfs40_shutdown_client,
36281caa 8692 .match_stateid = nfs4_match_stateid,
fca78d6d 8693 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8694 .free_lock_state = nfs4_release_lockowner,
63f5f796 8695 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8696 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8697 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8698 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8699 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8700 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8701};
8702
8703#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8704static struct nfs_seqid *
8705nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8706{
8707 return NULL;
8708}
8709
97dc1359
TM		 8710static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8711 .minor_version = 1,
39c6daae
TM		 8712 .init_caps = NFS_CAP_READDIRPLUS
8713 | NFS_CAP_ATOMIC_OPEN
3b66486c 8714 | NFS_CAP_POSIX_LOCK
49f9a0fa 8715 | NFS_CAP_STATEID_NFSV41
e983120e 8716 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8717 .init_client = nfs41_init_client,
8718 .shutdown_client = nfs41_shutdown_client,
36281caa 8719 .match_stateid = nfs41_match_stateid,
fca78d6d 8720 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8721 .free_lock_state = nfs41_free_lock_state,
63f5f796 8722 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8723 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8724 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8725 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8726 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8727 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8728};
8729#endif
8730
42c2c424
SD		 8731#if defined(CONFIG_NFS_V4_2)
8732static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8733 .minor_version = 2,
7017310a
BS		 8734 .init_caps = NFS_CAP_READDIRPLUS
8735 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8736 | NFS_CAP_POSIX_LOCK
8737 | NFS_CAP_STATEID_NFSV41
e983120e 8738 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8739 | NFS_CAP_ALLOCATE
624bd5b7 8740 | NFS_CAP_DEALLOCATE
6c5a0d89 8741 | NFS_CAP_SEEK
e5341f3a
PT		 8742 | NFS_CAP_LAYOUTSTATS
8743 | NFS_CAP_CLONE,
abf79bb3
CL		 8744 .init_client = nfs41_init_client,
8745 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8746 .match_stateid = nfs41_match_stateid,
8747 .find_root_sec = nfs41_find_root_sec,
7017310a 8748 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8749 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8750 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8751 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8752 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8753 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8754 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8755};
8756#endif
8757
97dc1359
TM		 8758const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8759 [0] = &nfs_v4_0_minor_ops,
8760#if defined(CONFIG_NFS_V4_1)
8761 [1] = &nfs_v4_1_minor_ops,
8762#endif
42c2c424
SD		 8763#if defined(CONFIG_NFS_V4_2)
8764 [2] = &nfs_v4_2_minor_ops,
8765#endif
97dc1359
TM		 8766};
8767
c4803c49
AG		 8768ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
8769{
8770 ssize_t error, error2;
8771
8772 error = generic_listxattr(dentry, list, size);
8773 if (error < 0)
8774 return error;
8775 if (list) {
8776 list += error;
8777 size -= error;
8778 }
8779
8780 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8781 if (error2 < 0)
8782 return error2;
8783 return error + error2;
8784}
8785
17f26b12 8786static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8787 .create = nfs_create,
8788 .lookup = nfs_lookup,
8789 .atomic_open = nfs_atomic_open,
8790 .link = nfs_link,
8791 .unlink = nfs_unlink,
8792 .symlink = nfs_symlink,
8793 .mkdir = nfs_mkdir,
8794 .rmdir = nfs_rmdir,
8795 .mknod = nfs_mknod,
8796 .rename = nfs_rename,
8797 .permission = nfs_permission,
8798 .getattr = nfs_getattr,
8799 .setattr = nfs_setattr,
8800 .getxattr = generic_getxattr,
8801 .setxattr = generic_setxattr,
c4803c49 8802 .listxattr = nfs4_listxattr,
73a79706
BS		 8803 .removexattr = generic_removexattr,
8804};
8805
92e1d5be 8806static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8807 .permission = nfs_permission,
8808 .getattr = nfs_getattr,
8809 .setattr = nfs_setattr,
64c2ce8b
AK		 8810 .getxattr = generic_getxattr,
8811 .setxattr = generic_setxattr,
c4803c49 8812 .listxattr = nfs4_listxattr,
64c2ce8b 8813 .removexattr = generic_removexattr,
6b3b5496
BF		 8814};
8815
509de811 8816const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8817 .version = 4, /* protocol version */
8818 .dentry_ops = &nfs4_dentry_operations,
8819 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8820 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8821 .file_ops = &nfs4_file_operations,
1da177e4 8822 .getroot = nfs4_proc_get_root,
281cad46 8823 .submount = nfs4_submount,
ff9099f2 8824 .try_mount = nfs4_try_mount,
1da177e4
LT		 8825 .getattr = nfs4_proc_getattr,
8826 .setattr = nfs4_proc_setattr,
8827 .lookup = nfs4_proc_lookup,
8828 .access = nfs4_proc_access,
8829 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8830 .create = nfs4_proc_create,
8831 .remove = nfs4_proc_remove,
8832 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8833 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8834 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8835 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8836 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8837 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8838 .link = nfs4_proc_link,
8839 .symlink = nfs4_proc_symlink,
8840 .mkdir = nfs4_proc_mkdir,
8841 .rmdir = nfs4_proc_remove,
8842 .readdir = nfs4_proc_readdir,
8843 .mknod = nfs4_proc_mknod,
8844 .statfs = nfs4_proc_statfs,
8845 .fsinfo = nfs4_proc_fsinfo,
8846 .pathconf = nfs4_proc_pathconf,
e9326dca 8847 .set_capabilities = nfs4_server_capabilities,
1da177e4 8848 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8849 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8850 .read_setup = nfs4_proc_read_setup,
ec06c096 8851 .read_done = nfs4_read_done,
1da177e4 8852 .write_setup = nfs4_proc_write_setup,
788e7a89 8853 .write_done = nfs4_write_done,
1da177e4 8854 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8855 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8856 .commit_done = nfs4_commit_done,
1da177e4 8857 .lock = nfs4_proc_lock,
e50a1c2e 8858 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8859 .close_context = nfs4_close_context,
2b484297 8860 .open_context = nfs4_atomic_open,
011e2a7f 8861 .have_delegation = nfs4_have_delegation,
57ec14c5 8862 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8863 .alloc_client = nfs4_alloc_client,
45a52a02 8864 .init_client = nfs4_init_client,
cdb7eced 8865 .free_client = nfs4_free_client,
1179acc6
BS		 8866 .create_server = nfs4_create_server,
8867 .clone_server = nfs_clone_server,
1da177e4
LT		 8868};
8869
64c2ce8b 8870static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 8871 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 8872 .list = nfs4_xattr_list_nfs4_acl,
8873 .get = nfs4_xattr_get_nfs4_acl,
8874 .set = nfs4_xattr_set_nfs4_acl,
8875};
8876
8877const struct xattr_handler *nfs4_xattr_handlers[] = {
8878 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8879#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8880 &nfs4_xattr_nfs4_label_handler,
8881#endif
64c2ce8b
AK		 8882 NULL
8883};
8884
1da177e4
LT		 8885/*
8886 * Local variables:
8887 * c-basic-offset: 8
8888 * End:
8889 */
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