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nfs41: establish sessions-based clientid
[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>
39#include <linux/utsname.h>
40#include <linux/delay.h>
41#include <linux/errno.h>
42#include <linux/string.h>
43#include <linux/sunrpc/clnt.h>
44#include <linux/nfs.h>
45#include <linux/nfs4.h>
46#include <linux/nfs_fs.h>
47#include <linux/nfs_page.h>
48#include <linux/smp_lock.h>
49#include <linux/namei.h>
02a913a7 50#include <linux/mount.h>
99fe60d0 51#include <linux/module.h>
1da177e4 52
4ce79717 53#include "nfs4_fs.h"
1da177e4 54#include "delegation.h"
101070ca 55#include "internal.h"
006ea73e 56#include "iostat.h"
fc931582 57#include "callback.h"
1da177e4
LT		 58
59#define NFSDBG_FACILITY NFSDBG_PROC
60
2066fe89 61#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 62#define NFS4_POLL_RETRY_MAX (15*HZ)
63
cdd4e68b 64struct nfs4_opendata;
864472e9 65static int _nfs4_proc_open(struct nfs4_opendata *data);
1da177e4 66static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 67static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
9936781d
TM		 68static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
1da177e4 70
1da177e4 71/* Prevent leaks of NFSv4 errors into userland */
46f72f57 72static int nfs4_map_errors(int err)
1da177e4
LT		 73{
74 if (err < -1000) {
75 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 76 __func__, -err);
1da177e4
LT		 77 return -EIO;
78 }
79 return err;
80}
81
82/*
83 * This is our standard bitmap for GETATTR requests.
84 */
85const u32 nfs4_fattr_bitmap[2] = {
86 FATTR4_WORD0_TYPE
87 | FATTR4_WORD0_CHANGE
88 | FATTR4_WORD0_SIZE
89 | FATTR4_WORD0_FSID
90 | FATTR4_WORD0_FILEID,
91 FATTR4_WORD1_MODE
92 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER
94 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_RAWDEV
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
100};
101
102const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
109};
110
4ce79717 111const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 112 FATTR4_WORD0_MAXLINK
113 | FATTR4_WORD0_MAXNAME,
114 0
115};
116
117const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
121 0
122};
123
830b8e33
MN		 124const u32 nfs4_fs_locations_bitmap[2] = {
125 FATTR4_WORD0_TYPE
126 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_SIZE
128 | FATTR4_WORD0_FSID
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
131 FATTR4_WORD1_MODE
132 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
141};
142
bc4785cd 143static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 144 struct nfs4_readdir_arg *readdir)
145{
0dbb4c67 146 __be32 *start, *p;
1da177e4
LT		 147
148 BUG_ON(readdir->count < 80);
149 if (cookie > 2) {
b7ef1956 150 readdir->cookie = cookie;
1da177e4
LT		 151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
152 return;
153 }
154
155 readdir->cookie = 0;
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
157 if (cookie == 2)
158 return;
159
160 /*
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
165 * instead of 1 or 2.
166 */
0dbb4c67 167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
1da177e4
LT		 168
169 if (cookie == 0) {
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
175 p++;
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
4e769b93 179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 180 }
181
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
187 p++;
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
4e769b93 191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 192
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
196}
197
65de872e
TM		 198static int nfs4_wait_clnt_recover(struct nfs_client *clp)
199{
200 int res;
201
202 might_sleep();
203
e005e804 204 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
72cb77f4 205 nfs_wait_bit_killable, TASK_KILLABLE);
65de872e
TM		 206 return res;
207}
208
209static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
210{
211 int res = 0;
212
213 might_sleep();
214
215 if (*timeout <= 0)
216 *timeout = NFS4_POLL_RETRY_MIN;
217 if (*timeout > NFS4_POLL_RETRY_MAX)
218 *timeout = NFS4_POLL_RETRY_MAX;
219 schedule_timeout_killable(*timeout);
220 if (fatal_signal_pending(current))
221 res = -ERESTARTSYS;
222 *timeout <<= 1;
223 return res;
224}
225
226/* This is the error handling routine for processes that are allowed
227 * to sleep.
228 */
229static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
230{
231 struct nfs_client *clp = server->nfs_client;
9e33bed5 232 struct nfs4_state *state = exception->state;
65de872e
TM		 233 int ret = errorcode;
234
235 exception->retry = 0;
236 switch(errorcode) {
237 case 0:
238 return 0;
9e33bed5
TM		 239 case -NFS4ERR_ADMIN_REVOKED:
240 case -NFS4ERR_BAD_STATEID:
241 case -NFS4ERR_OPENMODE:
242 if (state == NULL)
243 break;
244 nfs4_state_mark_reclaim_nograce(clp, state);
65de872e
TM		 245 case -NFS4ERR_STALE_CLIENTID:
246 case -NFS4ERR_STALE_STATEID:
247 case -NFS4ERR_EXPIRED:
248 nfs4_schedule_state_recovery(clp);
249 ret = nfs4_wait_clnt_recover(clp);
250 if (ret == 0)
251 exception->retry = 1;
4745e315 252#if !defined(CONFIG_NFS_V4_1)
65de872e 253 break;
4745e315
AA		 254#else /* !defined(CONFIG_NFS_V4_1) */
255 if (!nfs4_has_session(server->nfs_client))
256 break;
257 /* FALLTHROUGH */
258 case -NFS4ERR_BADSESSION:
259 case -NFS4ERR_BADSLOT:
260 case -NFS4ERR_BAD_HIGH_SLOT:
261 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
262 case -NFS4ERR_DEADSESSION:
263 case -NFS4ERR_SEQ_FALSE_RETRY:
264 case -NFS4ERR_SEQ_MISORDERED:
265 dprintk("%s ERROR: %d Reset session\n", __func__,
266 errorcode);
267 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
268 exception->retry = 1;
269 /* FALLTHROUGH */
270#endif /* !defined(CONFIG_NFS_V4_1) */
65de872e
TM		 271 case -NFS4ERR_FILE_OPEN:
272 case -NFS4ERR_GRACE:
273 case -NFS4ERR_DELAY:
274 ret = nfs4_delay(server->client, &exception->timeout);
275 if (ret != 0)
276 break;
277 case -NFS4ERR_OLD_STATEID:
278 exception->retry = 1;
279 }
280 /* We failed to handle the error */
281 return nfs4_map_errors(ret);
282}
283
284
26e976a8 285static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
1da177e4 286{
7539bbab 287 struct nfs_client *clp = server->nfs_client;
1da177e4
LT		 288 spin_lock(&clp->cl_lock);
289 if (time_before(clp->cl_last_renewal,timestamp))
290 clp->cl_last_renewal = timestamp;
291 spin_unlock(&clp->cl_lock);
292}
293
cccef3b9
AA		 294#if defined(CONFIG_NFS_V4_1)
295
e2c4ab3c
AA		 296/*
297 * nfs4_free_slot - free a slot and efficiently update slot table.
298 *
299 * freeing a slot is trivially done by clearing its respective bit
300 * in the bitmap.
301 * If the freed slotid equals highest_used_slotid we want to update it
302 * so that the server would be able to size down the slot table if needed,
303 * otherwise we know that the highest_used_slotid is still in use.
304 * When updating highest_used_slotid there may be "holes" in the bitmap
305 * so we need to scan down from highest_used_slotid to 0 looking for the now
306 * highest slotid in use.
307 * If none found, highest_used_slotid is set to -1.
308 */
309static void
310nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
311{
312 int slotid = free_slotid;
313
314 spin_lock(&tbl->slot_tbl_lock);
315 /* clear used bit in bitmap */
316 __clear_bit(slotid, tbl->used_slots);
317
318 /* update highest_used_slotid when it is freed */
319 if (slotid == tbl->highest_used_slotid) {
320 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
321 if (slotid >= 0 && slotid < tbl->max_slots)
322 tbl->highest_used_slotid = slotid;
323 else
324 tbl->highest_used_slotid = -1;
325 }
326 rpc_wake_up_next(&tbl->slot_tbl_waitq);
327 spin_unlock(&tbl->slot_tbl_lock);
328 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
329 free_slotid, tbl->highest_used_slotid);
330}
331
13615871
AA		 332void nfs41_sequence_free_slot(const struct nfs_client *clp,
333 struct nfs4_sequence_res *res)
334{
335 struct nfs4_slot_table *tbl;
336
337 if (!nfs4_has_session(clp)) {
338 dprintk("%s: No session\n", __func__);
339 return;
340 }
341 tbl = &clp->cl_session->fc_slot_table;
342 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
343 dprintk("%s: No slot\n", __func__);
344 /* just wake up the next guy waiting since
345 * we may have not consumed a slot after all */
346 rpc_wake_up_next(&tbl->slot_tbl_waitq);
347 return;
348 }
349 nfs4_free_slot(tbl, res->sr_slotid);
350 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
351}
352
b0df806c
AA		 353static void nfs41_sequence_done(struct nfs_client *clp,
354 struct nfs4_sequence_res *res,
355 int rpc_status)
356{
357 unsigned long timestamp;
358 struct nfs4_slot_table *tbl;
359 struct nfs4_slot *slot;
360
361 /*
362 * sr_status remains 1 if an RPC level error occurred. The server
363 * may or may not have processed the sequence operation..
364 * Proceed as if the server received and processed the sequence
365 * operation.
366 */
367 if (res->sr_status == 1)
368 res->sr_status = NFS_OK;
369
370 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
371 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
372 goto out;
373
374 tbl = &clp->cl_session->fc_slot_table;
375 slot = tbl->slots + res->sr_slotid;
376
377 if (res->sr_status == 0) {
378 /* Update the slot's sequence and clientid lease timer */
379 ++slot->seq_nr;
380 timestamp = res->sr_renewal_time;
381 spin_lock(&clp->cl_lock);
382 if (time_before(clp->cl_last_renewal, timestamp))
383 clp->cl_last_renewal = timestamp;
384 spin_unlock(&clp->cl_lock);
385 return;
386 }
387out:
388 /* The session may be reset by one of the error handlers. */
389 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
390 nfs41_sequence_free_slot(clp, res);
391}
392
510b8175
BH		 393/*
394 * nfs4_find_slot - efficiently look for a free slot
395 *
396 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
397 * If found, we mark the slot as used, update the highest_used_slotid,
398 * and respectively set up the sequence operation args.
399 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
fbcd4abc
AA		 400 *
401 * Note: must be called with under the slot_tbl_lock.
510b8175
BH		 402 */
403static u8
404nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
405{
406 int slotid;
407 u8 ret_id = NFS4_MAX_SLOT_TABLE;
408 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
409
510b8175
BH		 410 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
411 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
412 tbl->max_slots);
413 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
414 if (slotid >= tbl->max_slots)
415 goto out;
416 __set_bit(slotid, tbl->used_slots);
417 if (slotid > tbl->highest_used_slotid)
418 tbl->highest_used_slotid = slotid;
419 ret_id = slotid;
420out:
421 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
422 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
510b8175
BH		 423 return ret_id;
424}
425
b069d94a
AA		 426static int nfs4_recover_session(struct nfs4_session *session)
427{
428 struct nfs_client *clp = session->clp;
429 int ret;
430
431 for (;;) {
432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret != 0)
434 return ret;
435 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
436 break;
437 nfs4_schedule_state_manager(clp);
438 }
439 return 0;
440}
441
ce5039c1
AA		 442static int nfs41_setup_sequence(struct nfs4_session *session,
443 struct nfs4_sequence_args *args,
444 struct nfs4_sequence_res *res,
445 int cache_reply,
446 struct rpc_task *task)
447{
fbcd4abc
AA		 448 struct nfs4_slot *slot;
449 struct nfs4_slot_table *tbl;
b069d94a 450 int status = 0;
fbcd4abc
AA		 451 u8 slotid;
452
453 dprintk("--> %s\n", __func__);
ce5039c1
AA		 454 /* slot already allocated? */
455 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
456 return 0;
457
458 memset(res, 0, sizeof(*res));
459 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
fbcd4abc
AA		 460 tbl = &session->fc_slot_table;
461
462 spin_lock(&tbl->slot_tbl_lock);
b069d94a
AA		 463 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
464 if (tbl->highest_used_slotid != -1) {
465 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
466 spin_unlock(&tbl->slot_tbl_lock);
467 dprintk("<-- %s: Session reset: draining\n", __func__);
468 return -EAGAIN;
469 }
470
471 /* The slot table is empty; start the reset thread */
472 dprintk("%s Session Reset\n", __func__);
473 spin_unlock(&tbl->slot_tbl_lock);
474 status = nfs4_recover_session(session);
475 if (status)
476 return status;
477 spin_lock(&tbl->slot_tbl_lock);
478 }
479
fbcd4abc
AA		 480 slotid = nfs4_find_slot(tbl, task);
481 if (slotid == NFS4_MAX_SLOT_TABLE) {
482 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
483 spin_unlock(&tbl->slot_tbl_lock);
484 dprintk("<-- %s: no free slots\n", __func__);
485 return -EAGAIN;
486 }
487 spin_unlock(&tbl->slot_tbl_lock);
488
489 slot = tbl->slots + slotid;
99fe60d0 490 args->sa_session = session;
fbcd4abc
AA		 491 args->sa_slotid = slotid;
492 args->sa_cache_this = cache_reply;
493
494 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
495
99fe60d0 496 res->sr_session = session;
fbcd4abc
AA		 497 res->sr_slotid = slotid;
498 res->sr_renewal_time = jiffies;
499 /*
500 * sr_status is only set in decode_sequence, and so will remain
501 * set to 1 if an rpc level failure occurs.
502 */
503 res->sr_status = 1;
ce5039c1
AA		 504 return 0;
505}
506
507int nfs4_setup_sequence(struct nfs_client *clp,
508 struct nfs4_sequence_args *args,
509 struct nfs4_sequence_res *res,
510 int cache_reply,
511 struct rpc_task *task)
512{
513 int ret = 0;
514
515 dprintk("--> %s clp %p session %p sr_slotid %d\n",
516 __func__, clp, clp->cl_session, res->sr_slotid);
517
518 if (!nfs4_has_session(clp))
519 goto out;
520 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
521 task);
522 if (ret != -EAGAIN) {
523 /* terminate rpc task */
524 task->tk_status = ret;
525 task->tk_action = NULL;
526 }
527out:
528 dprintk("<-- %s status=%d\n", __func__, ret);
529 return ret;
530}
531
532struct nfs41_call_sync_data {
533 struct nfs_client *clp;
534 struct nfs4_sequence_args *seq_args;
535 struct nfs4_sequence_res *seq_res;
536 int cache_reply;
537};
538
539static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
540{
541 struct nfs41_call_sync_data *data = calldata;
542
543 dprintk("--> %s data->clp->cl_session %p\n", __func__,
544 data->clp->cl_session);
545 if (nfs4_setup_sequence(data->clp, data->seq_args,
546 data->seq_res, data->cache_reply, task))
547 return;
548 rpc_call_start(task);
549}
550
69ab40c4
AA		 551static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
552{
553 struct nfs41_call_sync_data *data = calldata;
554
555 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
556 nfs41_sequence_free_slot(data->clp, data->seq_res);
557}
558
ce5039c1
AA		 559struct rpc_call_ops nfs41_call_sync_ops = {
560 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 561 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 562};
563
564static int nfs4_call_sync_sequence(struct nfs_client *clp,
565 struct rpc_clnt *clnt,
566 struct rpc_message *msg,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
569 int cache_reply)
570{
571 int ret;
572 struct rpc_task *task;
573 struct nfs41_call_sync_data data = {
574 .clp = clp,
575 .seq_args = args,
576 .seq_res = res,
577 .cache_reply = cache_reply,
578 };
579 struct rpc_task_setup task_setup = {
580 .rpc_client = clnt,
581 .rpc_message = msg,
582 .callback_ops = &nfs41_call_sync_ops,
583 .callback_data = &data
584 };
585
586 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
587 task = rpc_run_task(&task_setup);
588 if (IS_ERR(task))
589 ret = PTR_ERR(task);
590 else {
591 ret = task->tk_status;
592 rpc_put_task(task);
593 }
594 return ret;
595}
596
cccef3b9
AA		 597int _nfs4_call_sync_session(struct nfs_server *server,
598 struct rpc_message *msg,
599 struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res,
601 int cache_reply)
602{
ce5039c1
AA		 603 return nfs4_call_sync_sequence(server->nfs_client, server->client,
604 msg, args, res, cache_reply);
cccef3b9
AA		 605}
606
607#endif /* CONFIG_NFS_V4_1 */
608
609int _nfs4_call_sync(struct nfs_server *server,
610 struct rpc_message *msg,
611 struct nfs4_sequence_args *args,
612 struct nfs4_sequence_res *res,
613 int cache_reply)
614{
f3752975 615 args->sa_session = res->sr_session = NULL;
cccef3b9
AA		 616 return rpc_call_sync(server->client, msg, 0);
617}
618
619#define nfs4_call_sync(server, msg, args, res, cache_reply) \
620 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
621 &(res)->seq_res, (cache_reply))
622
b0df806c
AA		 623static void nfs4_sequence_done(const struct nfs_server *server,
624 struct nfs4_sequence_res *res, int rpc_status)
625{
626#ifdef CONFIG_NFS_V4_1
627 if (nfs4_has_session(server->nfs_client))
628 nfs41_sequence_done(server->nfs_client, res, rpc_status);
629#endif /* CONFIG_NFS_V4_1 */
630}
631
632/* no restart, therefore free slot here */
633static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
634 struct nfs4_sequence_res *res,
635 int rpc_status)
636{
637 nfs4_sequence_done(server, res, rpc_status);
638 nfs4_sequence_free_slot(server->nfs_client, res);
639}
640
38478b24 641static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 642{
38478b24 643 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 644
38478b24 645 spin_lock(&dir->i_lock);
40d24704
TM		 646 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
647 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
bfc69a45 648 nfs_force_lookup_revalidate(dir);
40d24704 649 nfsi->change_attr = cinfo->after;
38478b24 650 spin_unlock(&dir->i_lock);
1da177e4
LT		 651}
652
e56e0b78 653struct nfs4_opendata {
c6d00e63 654 struct kref kref;
e56e0b78
TM		 655 struct nfs_openargs o_arg;
656 struct nfs_openres o_res;
cdd4e68b
TM		 657 struct nfs_open_confirmargs c_arg;
658 struct nfs_open_confirmres c_res;
e56e0b78
TM		 659 struct nfs_fattr f_attr;
660 struct nfs_fattr dir_attr;
ad389da7 661 struct path path;
e56e0b78
TM		 662 struct dentry *dir;
663 struct nfs4_state_owner *owner;
aac00a8d 664 struct nfs4_state *state;
e56e0b78 665 struct iattr attrs;
26e976a8 666 unsigned long timestamp;
3e309914 667 unsigned int rpc_done : 1;
24ac23ab
TM		 668 int rpc_status;
669 int cancelled;
e56e0b78
TM		 670};
671
2ced46c2
TM		 672
673static void nfs4_init_opendata_res(struct nfs4_opendata *p)
674{
675 p->o_res.f_attr = &p->f_attr;
676 p->o_res.dir_attr = &p->dir_attr;
c1d51931
TM		 677 p->o_res.seqid = p->o_arg.seqid;
678 p->c_res.seqid = p->c_arg.seqid;
2ced46c2
TM		 679 p->o_res.server = p->o_arg.server;
680 nfs_fattr_init(&p->f_attr);
681 nfs_fattr_init(&p->dir_attr);
682}
683
ad389da7 684static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
dc0b027d 685 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
e56e0b78
TM		 686 const struct iattr *attrs)
687{
ad389da7 688 struct dentry *parent = dget_parent(path->dentry);
e56e0b78
TM		 689 struct inode *dir = parent->d_inode;
690 struct nfs_server *server = NFS_SERVER(dir);
691 struct nfs4_opendata *p;
692
693 p = kzalloc(sizeof(*p), GFP_KERNEL);
694 if (p == NULL)
695 goto err;
696 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
697 if (p->o_arg.seqid == NULL)
698 goto err_free;
ad389da7
TM		 699 p->path.mnt = mntget(path->mnt);
700 p->path.dentry = dget(path->dentry);
e56e0b78
TM		 701 p->dir = parent;
702 p->owner = sp;
703 atomic_inc(&sp->so_count);
704 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 705 p->o_arg.open_flags = flags;
706 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
7539bbab 707 p->o_arg.clientid = server->nfs_client->cl_clientid;
9f958ab8 708 p->o_arg.id = sp->so_owner_id.id;
ad389da7 709 p->o_arg.name = &p->path.dentry->d_name;
e56e0b78
TM		 710 p->o_arg.server = server;
711 p->o_arg.bitmask = server->attr_bitmask;
712 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
5f7dbd5c 713 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
e56e0b78
TM		 714 if (flags & O_EXCL) {
715 u32 *s = (u32 *) p->o_arg.u.verifier.data;
716 s[0] = jiffies;
717 s[1] = current->pid;
718 } else if (flags & O_CREAT) {
719 p->o_arg.u.attrs = &p->attrs;
720 memcpy(&p->attrs, attrs, sizeof(p->attrs));
721 }
cdd4e68b
TM		 722 p->c_arg.fh = &p->o_res.fh;
723 p->c_arg.stateid = &p->o_res.stateid;
724 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 725 nfs4_init_opendata_res(p);
c6d00e63 726 kref_init(&p->kref);
e56e0b78
TM		 727 return p;
728err_free:
729 kfree(p);
730err:
731 dput(parent);
732 return NULL;
733}
734
c6d00e63 735static void nfs4_opendata_free(struct kref *kref)
e56e0b78 736{
c6d00e63
TM		 737 struct nfs4_opendata *p = container_of(kref,
738 struct nfs4_opendata, kref);
739
740 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 741 if (p->state != NULL)
742 nfs4_put_open_state(p->state);
c6d00e63
TM		 743 nfs4_put_state_owner(p->owner);
744 dput(p->dir);
31f31db1 745 path_put(&p->path);
c6d00e63
TM		 746 kfree(p);
747}
748
749static void nfs4_opendata_put(struct nfs4_opendata *p)
750{
751 if (p != NULL)
752 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 753}
754
06f814a3
TM		 755static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
756{
06f814a3
TM		 757 int ret;
758
06f814a3 759 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 760 return ret;
761}
762
dc0b027d 763static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 764{
765 int ret = 0;
dc0b027d
TM		 766
767 if (open_mode & O_EXCL)
768 goto out;
769 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268
TM		 770 case FMODE_READ:
771 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
6ee41268
TM		 772 break;
773 case FMODE_WRITE:
774 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
6ee41268
TM		 775 break;
776 case FMODE_READ|FMODE_WRITE:
777 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
778 }
dc0b027d 779out:
6ee41268
TM		 780 return ret;
781}
782
dc0b027d 783static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 784{
dc0b027d 785 if ((delegation->type & fmode) != fmode)
aac00a8d 786 return 0;
15c831bf 787 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 788 return 0;
b7391f44 789 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 790 return 1;
791}
792
dc0b027d 793static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 794{
dc0b027d 795 switch (fmode) {
e7616923
TM		 796 case FMODE_WRITE:
797 state->n_wronly++;
798 break;
799 case FMODE_READ:
800 state->n_rdonly++;
801 break;
802 case FMODE_READ|FMODE_WRITE:
803 state->n_rdwr++;
804 }
dc0b027d 805 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 806}
807
dc0b027d 808static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 809{
810 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
811 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
812 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
dc0b027d 813 switch (fmode) {
003707c7
TM		 814 case FMODE_READ:
815 set_bit(NFS_O_RDONLY_STATE, &state->flags);
816 break;
817 case FMODE_WRITE:
818 set_bit(NFS_O_WRONLY_STATE, &state->flags);
819 break;
820 case FMODE_READ|FMODE_WRITE:
821 set_bit(NFS_O_RDWR_STATE, &state->flags);
822 }
e7616923
TM		 823}
824
dc0b027d 825static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 826{
8bda4e4c 827 write_seqlock(&state->seqlock);
dc0b027d 828 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 829 write_sequnlock(&state->seqlock);
003707c7
TM		 830}
831
dc0b027d 832static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 833{
8bda4e4c
TM		 834 /*
835 * Protect the call to nfs4_state_set_mode_locked and
836 * serialise the stateid update
837 */
838 write_seqlock(&state->seqlock);
003707c7
TM		 839 if (deleg_stateid != NULL) {
840 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
841 set_bit(NFS_DELEGATED_STATE, &state->flags);
842 }
843 if (open_stateid != NULL)
dc0b027d 844 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 845 write_sequnlock(&state->seqlock);
846 spin_lock(&state->owner->so_lock);
dc0b027d 847 update_open_stateflags(state, fmode);
ec073428 848 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 849}
850
dc0b027d 851static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 852{
853 struct nfs_inode *nfsi = NFS_I(state->inode);
854 struct nfs_delegation *deleg_cur;
855 int ret = 0;
856
dc0b027d 857 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 858
859 rcu_read_lock();
860 deleg_cur = rcu_dereference(nfsi->delegation);
861 if (deleg_cur == NULL)
862 goto no_delegation;
863
864 spin_lock(&deleg_cur->lock);
865 if (nfsi->delegation != deleg_cur ||
dc0b027d 866 (deleg_cur->type & fmode) != fmode)
34310430
TM		 867 goto no_delegation_unlock;
868
869 if (delegation == NULL)
870 delegation = &deleg_cur->stateid;
871 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
872 goto no_delegation_unlock;
873
b7391f44 874 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 875 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 876 ret = 1;
877no_delegation_unlock:
878 spin_unlock(&deleg_cur->lock);
879no_delegation:
880 rcu_read_unlock();
881
882 if (!ret && open_stateid != NULL) {
dc0b027d 883 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 884 ret = 1;
885 }
886
887 return ret;
888}
889
890
dc0b027d 891static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 892{
893 struct nfs_delegation *delegation;
894
895 rcu_read_lock();
896 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 897 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 898 rcu_read_unlock();
899 return;
900 }
901 rcu_read_unlock();
902 nfs_inode_return_delegation(inode);
903}
904
6ee41268 905static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 906{
907 struct nfs4_state *state = opendata->state;
908 struct nfs_inode *nfsi = NFS_I(state->inode);
909 struct nfs_delegation *delegation;
dc0b027d
TM		 910 int open_mode = opendata->o_arg.open_flags & O_EXCL;
911 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 912 nfs4_stateid stateid;
913 int ret = -EAGAIN;
914
aac00a8d 915 for (;;) {
dc0b027d 916 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 917 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 918 if (can_open_cached(state, fmode, open_mode)) {
919 update_open_stateflags(state, fmode);
6ee41268 920 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 921 goto out_return_state;
922 }
923 spin_unlock(&state->owner->so_lock);
924 }
34310430
TM		 925 rcu_read_lock();
926 delegation = rcu_dereference(nfsi->delegation);
927 if (delegation == NULL ||
dc0b027d 928 !can_open_delegated(delegation, fmode)) {
34310430 929 rcu_read_unlock();
aac00a8d 930 break;
34310430 931 }
aac00a8d
TM		 932 /* Save the delegation */
933 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
934 rcu_read_unlock();
af22f94a 935 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 936 if (ret != 0)
937 goto out;
938 ret = -EAGAIN;
34310430
TM		 939
940 /* Try to update the stateid using the delegation */
dc0b027d 941 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 942 goto out_return_state;
aac00a8d 943 }
aac00a8d
TM		 944out:
945 return ERR_PTR(ret);
946out_return_state:
947 atomic_inc(&state->count);
948 return state;
949}
950
24ac23ab
TM		 951static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
952{
953 struct inode *inode;
954 struct nfs4_state *state = NULL;
003707c7 955 struct nfs_delegation *delegation;
1b370bc2 956 int ret;
24ac23ab 957
aac00a8d 958 if (!data->rpc_done) {
6ee41268 959 state = nfs4_try_open_cached(data);
aac00a8d
TM		 960 goto out;
961 }
962
1b370bc2 963 ret = -EAGAIN;
24ac23ab 964 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 965 goto err;
24ac23ab 966 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 967 ret = PTR_ERR(inode);
03f28e3a 968 if (IS_ERR(inode))
1b370bc2
TM		 969 goto err;
970 ret = -ENOMEM;
24ac23ab
TM		 971 state = nfs4_get_open_state(inode, data->owner);
972 if (state == NULL)
1b370bc2 973 goto err_put_inode;
549d6ed5 974 if (data->o_res.delegation_type != 0) {
549d6ed5
TM		 975 int delegation_flags = 0;
976
003707c7
TM		 977 rcu_read_lock();
978 delegation = rcu_dereference(NFS_I(inode)->delegation);
979 if (delegation)
980 delegation_flags = delegation->flags;
981 rcu_read_unlock();
15c831bf 982 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
549d6ed5
TM		 983 nfs_inode_set_delegation(state->inode,
984 data->owner->so_cred,
985 &data->o_res);
986 else
987 nfs_inode_reclaim_delegation(state->inode,
988 data->owner->so_cred,
989 &data->o_res);
990 }
34310430
TM		 991
992 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 993 data->o_arg.fmode);
24ac23ab 994 iput(inode);
aac00a8d 995out:
24ac23ab 996 return state;
1b370bc2
TM		 997err_put_inode:
998 iput(inode);
999err:
1000 return ERR_PTR(ret);
24ac23ab
TM		 1001}
1002
864472e9
TM		 1003static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1004{
1005 struct nfs_inode *nfsi = NFS_I(state->inode);
1006 struct nfs_open_context *ctx;
1007
1008 spin_lock(&state->inode->i_lock);
1009 list_for_each_entry(ctx, &nfsi->open_files, list) {
1010 if (ctx->state != state)
1011 continue;
1012 get_nfs_open_context(ctx);
1013 spin_unlock(&state->inode->i_lock);
1014 return ctx;
1015 }
1016 spin_unlock(&state->inode->i_lock);
1017 return ERR_PTR(-ENOENT);
1018}
1019
6f220ed5
TM		 1020static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1021{
1022 struct nfs4_opendata *opendata;
1023
dc0b027d 1024 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
6f220ed5
TM		 1025 if (opendata == NULL)
1026 return ERR_PTR(-ENOMEM);
1027 opendata->state = state;
1028 atomic_inc(&state->count);
1029 return opendata;
1030}
1031
dc0b027d 1032static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1033{
2ced46c2 1034 struct nfs4_state *newstate;
864472e9
TM		 1035 int ret;
1036
dc0b027d
TM		 1037 opendata->o_arg.open_flags = 0;
1038 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1039 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1040 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1041 nfs4_init_opendata_res(opendata);
864472e9
TM		 1042 ret = _nfs4_proc_open(opendata);
1043 if (ret != 0)
1044 return ret;
2ced46c2 1045 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1046 if (IS_ERR(newstate))
1047 return PTR_ERR(newstate);
dc0b027d 1048 nfs4_close_state(&opendata->path, newstate, fmode);
2ced46c2 1049 *res = newstate;
864472e9
TM		 1050 return 0;
1051}
1052
1053static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1054{
864472e9 1055 struct nfs4_state *newstate;
864472e9
TM		 1056 int ret;
1057
1058 /* memory barrier prior to reading state->n_* */
2ced46c2 1059 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1060 smp_rmb();
1061 if (state->n_rdwr != 0) {
2ced46c2 1062 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1063 if (ret != 0)
1064 return ret;
2ced46c2
TM		 1065 if (newstate != state)
1066 return -ESTALE;
864472e9
TM		 1067 }
1068 if (state->n_wronly != 0) {
2ced46c2 1069 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1070 if (ret != 0)
1071 return ret;
2ced46c2
TM		 1072 if (newstate != state)
1073 return -ESTALE;
864472e9
TM		 1074 }
1075 if (state->n_rdonly != 0) {
2ced46c2 1076 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1077 if (ret != 0)
1078 return ret;
2ced46c2
TM		 1079 if (newstate != state)
1080 return -ESTALE;
864472e9 1081 }
1ac7e2fd
TM		 1082 /*
1083 * We may have performed cached opens for all three recoveries.
1084 * Check if we need to update the current stateid.
1085 */
1086 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1087 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
8bda4e4c 1088 write_seqlock(&state->seqlock);
1ac7e2fd
TM		 1089 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1090 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
8bda4e4c 1091 write_sequnlock(&state->seqlock);
1ac7e2fd 1092 }
864472e9
TM		 1093 return 0;
1094}
1095
1da177e4
LT		 1096/*
1097 * OPEN_RECLAIM:
1098 * reclaim state on the server after a reboot.
1da177e4 1099 */
539cd03a 1100static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1101{
1ac7e2fd 1102 struct nfs_delegation *delegation;
864472e9 1103 struct nfs4_opendata *opendata;
dc0b027d 1104 fmode_t delegation_type = 0;
1da177e4
LT		 1105 int status;
1106
6f220ed5
TM		 1107 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1108 if (IS_ERR(opendata))
1109 return PTR_ERR(opendata);
864472e9
TM		 1110 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1111 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1112 rcu_read_lock();
1113 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1114 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1115 delegation_type = delegation->type;
1ac7e2fd 1116 rcu_read_unlock();
864472e9
TM		 1117 opendata->o_arg.u.delegation_type = delegation_type;
1118 status = nfs4_open_recover(opendata, state);
c6d00e63 1119 nfs4_opendata_put(opendata);
1da177e4
LT		 1120 return status;
1121}
1122
539cd03a 1123static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1124{
1125 struct nfs_server *server = NFS_SERVER(state->inode);
1126 struct nfs4_exception exception = { };
1127 int err;
1128 do {
539cd03a 1129 err = _nfs4_do_open_reclaim(ctx, state);
202b50dc
TM		 1130 if (err != -NFS4ERR_DELAY)
1131 break;
1132 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1133 } while (exception.retry);
1134 return err;
1135}
1136
864472e9
TM		 1137static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1138{
1139 struct nfs_open_context *ctx;
1140 int ret;
1141
1142 ctx = nfs4_state_find_open_context(state);
1143 if (IS_ERR(ctx))
1144 return PTR_ERR(ctx);
539cd03a 1145 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1146 put_nfs_open_context(ctx);
1147 return ret;
1148}
1149
13437e12 1150static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1151{
e56e0b78 1152 struct nfs4_opendata *opendata;
864472e9 1153 int ret;
1da177e4 1154
6f220ed5
TM		 1155 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1156 if (IS_ERR(opendata))
1157 return PTR_ERR(opendata);
e56e0b78 1158 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
13437e12 1159 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
e56e0b78 1160 sizeof(opendata->o_arg.u.delegation.data));
864472e9 1161 ret = nfs4_open_recover(opendata, state);
c6d00e63 1162 nfs4_opendata_put(opendata);
864472e9 1163 return ret;
1da177e4
LT		 1164}
1165
13437e12 1166int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1167{
1168 struct nfs4_exception exception = { };
539cd03a 1169 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1170 int err;
1171 do {
13437e12 1172 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1173 switch (err) {
1174 case 0:
1175 return err;
1176 case -NFS4ERR_STALE_CLIENTID:
1177 case -NFS4ERR_STALE_STATEID:
1178 case -NFS4ERR_EXPIRED:
1179 /* Don't recall a delegation if it was lost */
7539bbab 1180 nfs4_schedule_state_recovery(server->nfs_client);
1da177e4
LT		 1181 return err;
1182 }
1183 err = nfs4_handle_exception(server, err, &exception);
1184 } while (exception.retry);
1185 return err;
1186}
1187
cdd4e68b
TM		 1188static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1189{
1190 struct nfs4_opendata *data = calldata;
1191
1192 data->rpc_status = task->tk_status;
1193 if (RPC_ASSASSINATED(task))
1194 return;
26e976a8 1195 if (data->rpc_status == 0) {
cdd4e68b
TM		 1196 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1197 sizeof(data->o_res.stateid.data));
bb22629e 1198 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1199 renew_lease(data->o_res.server, data->timestamp);
3e309914 1200 data->rpc_done = 1;
26e976a8 1201 }
cdd4e68b
TM		 1202}
1203
1204static void nfs4_open_confirm_release(void *calldata)
1205{
1206 struct nfs4_opendata *data = calldata;
1207 struct nfs4_state *state = NULL;
1208
1209 /* If this request hasn't been cancelled, do nothing */
1210 if (data->cancelled == 0)
1211 goto out_free;
1212 /* In case of error, no cleanup! */
3e309914 1213 if (!data->rpc_done)
cdd4e68b 1214 goto out_free;
cdd4e68b 1215 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1216 if (!IS_ERR(state))
dc0b027d 1217 nfs4_close_state(&data->path, state, data->o_arg.fmode);
cdd4e68b 1218out_free:
c6d00e63 1219 nfs4_opendata_put(data);
cdd4e68b
TM		 1220}
1221
1222static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1223 .rpc_call_done = nfs4_open_confirm_done,
1224 .rpc_release = nfs4_open_confirm_release,
1225};
1226
1227/*
1228 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1229 */
1230static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1231{
1232 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1233 struct rpc_task *task;
5138fde0
TM		 1234 struct rpc_message msg = {
1235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1236 .rpc_argp = &data->c_arg,
1237 .rpc_resp = &data->c_res,
1238 .rpc_cred = data->owner->so_cred,
1239 };
c970aa85
TM		 1240 struct rpc_task_setup task_setup_data = {
1241 .rpc_client = server->client,
5138fde0 1242 .rpc_message = &msg,
c970aa85
TM		 1243 .callback_ops = &nfs4_open_confirm_ops,
1244 .callback_data = data,
101070ca 1245 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1246 .flags = RPC_TASK_ASYNC,
1247 };
1da177e4
LT		 1248 int status;
1249
c6d00e63 1250 kref_get(&data->kref);
3e309914
TM		 1251 data->rpc_done = 0;
1252 data->rpc_status = 0;
5138fde0 1253 data->timestamp = jiffies;
c970aa85 1254 task = rpc_run_task(&task_setup_data);
7a1218a2 1255 if (IS_ERR(task))
cdd4e68b 1256 return PTR_ERR(task);
cdd4e68b
TM		 1257 status = nfs4_wait_for_completion_rpc_task(task);
1258 if (status != 0) {
1259 data->cancelled = 1;
1260 smp_wmb();
1261 } else
1262 status = data->rpc_status;
e6b3c4db 1263 rpc_put_task(task);
1da177e4
LT		 1264 return status;
1265}
1266
24ac23ab 1267static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1268{
24ac23ab
TM		 1269 struct nfs4_opendata *data = calldata;
1270 struct nfs4_state_owner *sp = data->owner;
5138fde0 1271
24ac23ab
TM		 1272 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1273 return;
aac00a8d
TM		 1274 /*
1275 * Check if we still need to send an OPEN call, or if we can use
1276 * a delegation instead.
1277 */
1278 if (data->state != NULL) {
1279 struct nfs_delegation *delegation;
1280
dc0b027d 1281 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1282 goto out_no_action;
aac00a8d
TM		 1283 rcu_read_lock();
1284 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1285 if (delegation != NULL &&
15c831bf 1286 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
aac00a8d 1287 rcu_read_unlock();
6ee41268 1288 goto out_no_action;
aac00a8d
TM		 1289 }
1290 rcu_read_unlock();
1291 }
24ac23ab 1292 /* Update sequence id. */
9f958ab8 1293 data->o_arg.id = sp->so_owner_id.id;
24ac23ab 1294 data->o_arg.clientid = sp->so_client->cl_clientid;
6f220ed5 1295 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1296 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1297 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1298 }
26e976a8 1299 data->timestamp = jiffies;
d898528c
AA		 1300 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1301 &data->o_arg.seq_args,
1302 &data->o_res.seq_res, 1, task))
1303 return;
5138fde0 1304 rpc_call_start(task);
6ee41268
TM		 1305 return;
1306out_no_action:
1307 task->tk_action = NULL;
1308
24ac23ab 1309}
1da177e4 1310
24ac23ab
TM		 1311static void nfs4_open_done(struct rpc_task *task, void *calldata)
1312{
1313 struct nfs4_opendata *data = calldata;
1da177e4 1314
24ac23ab 1315 data->rpc_status = task->tk_status;
d898528c
AA		 1316
1317 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1318 task->tk_status);
1319
24ac23ab
TM		 1320 if (RPC_ASSASSINATED(task))
1321 return;
1322 if (task->tk_status == 0) {
1323 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1324 case S_IFREG:
1325 break;
1326 case S_IFLNK:
24ac23ab 1327 data->rpc_status = -ELOOP;
6f926b5b
TM		 1328 break;
1329 case S_IFDIR:
24ac23ab 1330 data->rpc_status = -EISDIR;
6f926b5b
TM		 1331 break;
1332 default:
24ac23ab 1333 data->rpc_status = -ENOTDIR;
6f926b5b 1334 }
26e976a8 1335 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1336 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1337 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1338 }
3e309914 1339 data->rpc_done = 1;
24ac23ab 1340}
6f926b5b 1341
24ac23ab
TM		 1342static void nfs4_open_release(void *calldata)
1343{
1344 struct nfs4_opendata *data = calldata;
1345 struct nfs4_state *state = NULL;
1346
1347 /* If this request hasn't been cancelled, do nothing */
1348 if (data->cancelled == 0)
1349 goto out_free;
1350 /* In case of error, no cleanup! */
3e309914 1351 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1352 goto out_free;
1353 /* In case we need an open_confirm, no cleanup! */
1354 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1355 goto out_free;
24ac23ab 1356 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1357 if (!IS_ERR(state))
dc0b027d 1358 nfs4_close_state(&data->path, state, data->o_arg.fmode);
24ac23ab 1359out_free:
c6d00e63 1360 nfs4_opendata_put(data);
24ac23ab
TM		 1361}
1362
1363static const struct rpc_call_ops nfs4_open_ops = {
1364 .rpc_call_prepare = nfs4_open_prepare,
1365 .rpc_call_done = nfs4_open_done,
1366 .rpc_release = nfs4_open_release,
1367};
1368
1369/*
1370 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1371 */
1372static int _nfs4_proc_open(struct nfs4_opendata *data)
1373{
1374 struct inode *dir = data->dir->d_inode;
1375 struct nfs_server *server = NFS_SERVER(dir);
1376 struct nfs_openargs *o_arg = &data->o_arg;
1377 struct nfs_openres *o_res = &data->o_res;
1378 struct rpc_task *task;
5138fde0
TM		 1379 struct rpc_message msg = {
1380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1381 .rpc_argp = o_arg,
1382 .rpc_resp = o_res,
1383 .rpc_cred = data->owner->so_cred,
1384 };
c970aa85
TM		 1385 struct rpc_task_setup task_setup_data = {
1386 .rpc_client = server->client,
5138fde0 1387 .rpc_message = &msg,
c970aa85
TM		 1388 .callback_ops = &nfs4_open_ops,
1389 .callback_data = data,
101070ca 1390 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1391 .flags = RPC_TASK_ASYNC,
1392 };
24ac23ab
TM		 1393 int status;
1394
c6d00e63 1395 kref_get(&data->kref);
3e309914
TM		 1396 data->rpc_done = 0;
1397 data->rpc_status = 0;
2ced46c2 1398 data->cancelled = 0;
c970aa85 1399 task = rpc_run_task(&task_setup_data);
7a1218a2 1400 if (IS_ERR(task))
24ac23ab 1401 return PTR_ERR(task);
24ac23ab
TM		 1402 status = nfs4_wait_for_completion_rpc_task(task);
1403 if (status != 0) {
1404 data->cancelled = 1;
1405 smp_wmb();
1406 } else
1407 status = data->rpc_status;
e6b3c4db 1408 rpc_put_task(task);
3e309914 1409 if (status != 0 || !data->rpc_done)
24ac23ab
TM		 1410 return status;
1411
9936781d
TM		 1412 if (o_res->fh.size == 0)
1413 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1414
56ae19f3
TM		 1415 if (o_arg->open_flags & O_CREAT) {
1416 update_changeattr(dir, &o_res->cinfo);
1417 nfs_post_op_update_inode(dir, o_res->dir_attr);
1418 } else
1419 nfs_refresh_inode(dir, o_res->dir_attr);
1da177e4 1420 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1421 status = _nfs4_proc_open_confirm(data);
1da177e4 1422 if (status != 0)
24ac23ab 1423 return status;
1da177e4
LT		 1424 }
1425 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1426 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1427 return 0;
1da177e4
LT		 1428}
1429
10afec90 1430static int nfs4_recover_expired_lease(struct nfs_server *server)
58d9714a 1431{
7539bbab 1432 struct nfs_client *clp = server->nfs_client;
6b30954e 1433 int ret;
58d9714a 1434
6b30954e 1435 for (;;) {
65de872e 1436 ret = nfs4_wait_clnt_recover(clp);
6b30954e
TM		 1437 if (ret != 0)
1438 return ret;
e598d843
TM		 1439 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1440 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
6b30954e 1441 break;
58d9714a 1442 nfs4_schedule_state_recovery(clp);
6b30954e
TM		 1443 }
1444 return 0;
58d9714a
TM		 1445}
1446
1da177e4
LT		 1447/*
1448 * OPEN_EXPIRED:
1449 * reclaim state on the server after a network partition.
1450 * Assumes caller holds the appropriate lock
1451 */
539cd03a 1452static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1453{
e56e0b78 1454 struct nfs4_opendata *opendata;
864472e9 1455 int ret;
1da177e4 1456
6f220ed5
TM		 1457 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1458 if (IS_ERR(opendata))
1459 return PTR_ERR(opendata);
864472e9 1460 ret = nfs4_open_recover(opendata, state);
35d05778 1461 if (ret == -ESTALE)
539cd03a 1462 d_drop(ctx->path.dentry);
c6d00e63 1463 nfs4_opendata_put(opendata);
864472e9 1464 return ret;
1da177e4
LT		 1465}
1466
539cd03a 1467static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1468{
539cd03a 1469 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1470 struct nfs4_exception exception = { };
1471 int err;
1472
1473 do {
539cd03a 1474 err = _nfs4_open_expired(ctx, state);
027b6ca0
TM		 1475 if (err != -NFS4ERR_DELAY)
1476 break;
1477 nfs4_handle_exception(server, err, &exception);
202b50dc
TM		 1478 } while (exception.retry);
1479 return err;
1480}
1481
1da177e4
LT		 1482static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1483{
1da177e4 1484 struct nfs_open_context *ctx;
864472e9 1485 int ret;
1da177e4 1486
864472e9
TM		 1487 ctx = nfs4_state_find_open_context(state);
1488 if (IS_ERR(ctx))
1489 return PTR_ERR(ctx);
539cd03a 1490 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1491 put_nfs_open_context(ctx);
1492 return ret;
1da177e4
LT		 1493}
1494
aa53ed54
JL		 1495/*
1496 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1497 * fields corresponding to attributes that were used to store the verifier.
1498 * Make sure we clobber those fields in the later setattr call
1499 */
1500static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1501{
1502 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1503 !(sattr->ia_valid & ATTR_ATIME_SET))
1504 sattr->ia_valid |= ATTR_ATIME;
1505
1506 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1507 !(sattr->ia_valid & ATTR_MTIME_SET))
1508 sattr->ia_valid |= ATTR_MTIME;
1509}
1510
1da177e4 1511/*
24ac23ab 1512 * Returns a referenced nfs4_state
1da177e4 1513 */
dc0b027d 1514static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1da177e4
LT		 1515{
1516 struct nfs4_state_owner *sp;
1517 struct nfs4_state *state = NULL;
1518 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1519 struct nfs4_opendata *opendata;
aac00a8d 1520 int status;
1da177e4
LT		 1521
1522 /* Protect against reboot recovery conflicts */
1da177e4
LT		 1523 status = -ENOMEM;
1524 if (!(sp = nfs4_get_state_owner(server, cred))) {
1525 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1526 goto out_err;
1527 }
58d9714a
TM		 1528 status = nfs4_recover_expired_lease(server);
1529 if (status != 0)
b4454fe1 1530 goto err_put_state_owner;
aac00a8d 1531 if (path->dentry->d_inode != NULL)
dc0b027d 1532 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
58d9714a 1533 status = -ENOMEM;
dc0b027d 1534 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
e56e0b78 1535 if (opendata == NULL)
95d35cb4 1536 goto err_put_state_owner;
1da177e4 1537
aac00a8d
TM		 1538 if (path->dentry->d_inode != NULL)
1539 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1540
24ac23ab 1541 status = _nfs4_proc_open(opendata);
1da177e4 1542 if (status != 0)
c6d00e63 1543 goto err_opendata_put;
1da177e4 1544
aa53ed54
JL		 1545 if (opendata->o_arg.open_flags & O_EXCL)
1546 nfs4_exclusive_attrset(opendata, sattr);
1547
24ac23ab 1548 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1549 status = PTR_ERR(state);
1550 if (IS_ERR(state))
c6d00e63 1551 goto err_opendata_put;
c6d00e63 1552 nfs4_opendata_put(opendata);
1da177e4 1553 nfs4_put_state_owner(sp);
1da177e4
LT		 1554 *res = state;
1555 return 0;
c6d00e63
TM		 1556err_opendata_put:
1557 nfs4_opendata_put(opendata);
e56e0b78
TM		 1558err_put_state_owner:
1559 nfs4_put_state_owner(sp);
1da177e4 1560out_err:
1da177e4
LT		 1561 *res = NULL;
1562 return status;
1563}
1564
1565
dc0b027d 1566static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1da177e4
LT		 1567{
1568 struct nfs4_exception exception = { };
1569 struct nfs4_state *res;
1570 int status;
1571
1572 do {
dc0b027d 1573 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1da177e4
LT		 1574 if (status == 0)
1575 break;
1576 /* NOTE: BAD_SEQID means the server and client disagree about the
1577 * book-keeping w.r.t. state-changing operations
1578 * (OPEN/CLOSE/LOCK/LOCKU...)
1579 * It is actually a sign of a bug on the client or on the server.
1580 *
1581 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1582 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1583 * have unhashed the old state_owner for us, and that we can
1584 * therefore safely retry using a new one. We should still warn
1585 * the user though...
1586 */
1587 if (status == -NFS4ERR_BAD_SEQID) {
6f43ddcc
TM		 1588 printk(KERN_WARNING "NFS: v4 server %s "
1589 " returned a bad sequence-id error!\n",
1590 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1591 exception.retry = 1;
1592 continue;
1593 }
550f5747
TM		 1594 /*
1595 * BAD_STATEID on OPEN means that the server cancelled our
1596 * state before it received the OPEN_CONFIRM.
1597 * Recover by retrying the request as per the discussion
1598 * on Page 181 of RFC3530.
1599 */
1600 if (status == -NFS4ERR_BAD_STATEID) {
1601 exception.retry = 1;
1602 continue;
1603 }
aac00a8d
TM		 1604 if (status == -EAGAIN) {
1605 /* We must have found a delegation */
1606 exception.retry = 1;
1607 continue;
1608 }
1da177e4
LT		 1609 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1610 status, &exception));
1611 } while (exception.retry);
1612 return res;
1613}
1614
659bfcd6
TM		 1615static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1616 struct nfs_fattr *fattr, struct iattr *sattr,
1617 struct nfs4_state *state)
1da177e4 1618{
3e4f6290 1619 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1620 struct nfs_setattrargs arg = {
3e4f6290 1621 .fh = NFS_FH(inode),
1da177e4
LT		 1622 .iap = sattr,
1623 .server = server,
1624 .bitmask = server->attr_bitmask,
1625 };
1626 struct nfs_setattrres res = {
1627 .fattr = fattr,
1628 .server = server,
1629 };
1630 struct rpc_message msg = {
659bfcd6
TM		 1631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1632 .rpc_argp = &arg,
1633 .rpc_resp = &res,
1634 .rpc_cred = cred,
1da177e4 1635 };
26e976a8 1636 unsigned long timestamp = jiffies;
65e4308d 1637 int status;
1da177e4 1638
0e574af1 1639 nfs_fattr_init(fattr);
1da177e4 1640
3e4f6290
TM		 1641 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1642 /* Use that stateid */
1643 } else if (state != NULL) {
08e9eac4
TM		 1644 nfs4_copy_stateid(&arg.stateid, state, current->files);
1645 } else
1da177e4
LT		 1646 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1647
cccef3b9 1648 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
26e976a8
TM		 1649 if (status == 0 && state != NULL)
1650 renew_lease(server, timestamp);
65e4308d 1651 return status;
1da177e4
LT		 1652}
1653
659bfcd6
TM		 1654static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1655 struct nfs_fattr *fattr, struct iattr *sattr,
1656 struct nfs4_state *state)
1da177e4 1657{
3e4f6290 1658 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 1659 struct nfs4_exception exception = { };
1660 int err;
1661 do {
1662 err = nfs4_handle_exception(server,
659bfcd6 1663 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1da177e4
LT		 1664 &exception);
1665 } while (exception.retry);
1666 return err;
1667}
1668
1669struct nfs4_closedata {
4a35bd41 1670 struct path path;
1da177e4
LT		 1671 struct inode *inode;
1672 struct nfs4_state *state;
1673 struct nfs_closeargs arg;
1674 struct nfs_closeres res;
516a6af6 1675 struct nfs_fattr fattr;
26e976a8 1676 unsigned long timestamp;
1da177e4
LT		 1677};
1678
963d8fe5 1679static void nfs4_free_closedata(void *data)
9512135d 1680{
963d8fe5
TM		 1681 struct nfs4_closedata *calldata = data;
1682 struct nfs4_state_owner *sp = calldata->state->owner;
9512135d
TM		 1683
1684 nfs4_put_open_state(calldata->state);
1685 nfs_free_seqid(calldata->arg.seqid);
9512135d 1686 nfs4_put_state_owner(sp);
31f31db1 1687 path_put(&calldata->path);
9512135d
TM		 1688 kfree(calldata);
1689}
1690
963d8fe5 1691static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 1692{
963d8fe5 1693 struct nfs4_closedata *calldata = data;
1da177e4 1694 struct nfs4_state *state = calldata->state;
1da177e4
LT		 1695 struct nfs_server *server = NFS_SERVER(calldata->inode);
1696
19ddab06 1697 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
4ce70ada
TM		 1698 if (RPC_ASSASSINATED(task))
1699 return;
1da177e4
LT		 1700 /* hmm. we are done with the inode, and in the process of freeing
1701 * the state_owner. we keep this around to process errors
1702 */
1da177e4
LT		 1703 switch (task->tk_status) {
1704 case 0:
45328c35 1705 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 1706 renew_lease(server, calldata->timestamp);
1da177e4
LT		 1707 break;
1708 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 1709 case -NFS4ERR_OLD_STATEID:
1710 case -NFS4ERR_BAD_STATEID:
1da177e4 1711 case -NFS4ERR_EXPIRED:
dc0b027d 1712 if (calldata->arg.fmode == 0)
9e33bed5 1713 break;
1da177e4 1714 default:
9e33bed5 1715 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
eedc020e 1716 nfs4_restart_rpc(task, server->nfs_client);
1da177e4
LT		 1717 return;
1718 }
1719 }
19ddab06 1720 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
516a6af6 1721 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1da177e4
LT		 1722}
1723
4ce70ada 1724static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 1725{
4ce70ada 1726 struct nfs4_closedata *calldata = data;
9512135d 1727 struct nfs4_state *state = calldata->state;
003707c7 1728 int clear_rd, clear_wr, clear_rdwr;
9512135d 1729
963d8fe5 1730 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 1731 return;
003707c7 1732
003707c7 1733 clear_rd = clear_wr = clear_rdwr = 0;
4cecb76f 1734 spin_lock(&state->owner->so_lock);
003707c7 1735 /* Calculate the change in open mode */
e7616923 1736 if (state->n_rdwr == 0) {
003707c7 1737 if (state->n_rdonly == 0) {
003707c7
TM		 1738 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1739 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1740 }
1741 if (state->n_wronly == 0) {
003707c7
TM		 1742 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1743 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1744 }
e7616923 1745 }
4cecb76f 1746 spin_unlock(&state->owner->so_lock);
003707c7 1747 if (!clear_rd && !clear_wr && !clear_rdwr) {
963d8fe5
TM		 1748 /* Note: exit _without_ calling nfs4_close_done */
1749 task->tk_action = NULL;
9512135d
TM		 1750 return;
1751 }
516a6af6 1752 nfs_fattr_init(calldata->res.fattr);
45328c35 1753 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
5138fde0 1754 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1755 calldata->arg.fmode = FMODE_READ;
45328c35 1756 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
5138fde0 1757 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
dc0b027d 1758 calldata->arg.fmode = FMODE_WRITE;
45328c35 1759 }
26e976a8 1760 calldata->timestamp = jiffies;
19ddab06
AA		 1761 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1762 &calldata->arg.seq_args, &calldata->res.seq_res,
1763 1, task))
1764 return;
5138fde0 1765 rpc_call_start(task);
1da177e4
LT		 1766}
1767
963d8fe5 1768static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 1769 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 1770 .rpc_call_done = nfs4_close_done,
1771 .rpc_release = nfs4_free_closedata,
1772};
1773
1da177e4
LT		 1774/*
1775 * It is possible for data to be read/written from a mem-mapped file
1776 * after the sys_close call (which hits the vfs layer as a flush).
1777 * This means that we can't safely call nfsv4 close on a file until
1778 * the inode is cleared. This in turn means that we are not good
1779 * NFSv4 citizens - we do not indicate to the server to update the file's
1780 * share state even when we are done with one of the three share
1781 * stateid's in the inode.
1782 *
1783 * NOTE: Caller must be holding the sp->so_owner semaphore!
1784 */
a49c3c77 1785int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1da177e4 1786{
4a35bd41 1787 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 1788 struct nfs4_closedata *calldata;
b39e625b
TM		 1789 struct nfs4_state_owner *sp = state->owner;
1790 struct rpc_task *task;
5138fde0
TM		 1791 struct rpc_message msg = {
1792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1793 .rpc_cred = state->owner->so_cred,
1794 };
c970aa85
TM		 1795 struct rpc_task_setup task_setup_data = {
1796 .rpc_client = server->client,
5138fde0 1797 .rpc_message = &msg,
c970aa85 1798 .callback_ops = &nfs4_close_ops,
101070ca 1799 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1800 .flags = RPC_TASK_ASYNC,
1801 };
9512135d 1802 int status = -ENOMEM;
1da177e4 1803
19ddab06 1804 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1da177e4 1805 if (calldata == NULL)
9512135d 1806 goto out;
4a35bd41 1807 calldata->inode = state->inode;
1da177e4 1808 calldata->state = state;
4a35bd41 1809 calldata->arg.fh = NFS_FH(state->inode);
003707c7 1810 calldata->arg.stateid = &state->open_stateid;
1da177e4 1811 /* Serialization for the sequence id */
cee54fc9 1812 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
9512135d
TM		 1813 if (calldata->arg.seqid == NULL)
1814 goto out_free_calldata;
dc0b027d 1815 calldata->arg.fmode = 0;
a65318bf 1816 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 1817 calldata->res.fattr = &calldata->fattr;
c1d51931 1818 calldata->res.seqid = calldata->arg.seqid;
516a6af6 1819 calldata->res.server = server;
5f7dbd5c 1820 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4a35bd41
TM		 1821 calldata->path.mnt = mntget(path->mnt);
1822 calldata->path.dentry = dget(path->dentry);
9512135d 1823
5138fde0
TM		 1824 msg.rpc_argp = &calldata->arg,
1825 msg.rpc_resp = &calldata->res,
c970aa85
TM		 1826 task_setup_data.callback_data = calldata;
1827 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 1828 if (IS_ERR(task))
1829 return PTR_ERR(task);
a49c3c77
TM		 1830 status = 0;
1831 if (wait)
1832 status = rpc_wait_for_completion_task(task);
b39e625b 1833 rpc_put_task(task);
a49c3c77 1834 return status;
9512135d
TM		 1835out_free_calldata:
1836 kfree(calldata);
1837out:
b39e625b
TM		 1838 nfs4_put_open_state(state);
1839 nfs4_put_state_owner(sp);
9512135d 1840 return status;
1da177e4
LT		 1841}
1842
dc0b027d 1843static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
02a913a7
TM		 1844{
1845 struct file *filp;
1b45c46c 1846 int ret;
02a913a7 1847
1b45c46c 1848 /* If the open_intent is for execute, we have an extra check to make */
dc0b027d 1849 if (fmode & FMODE_EXEC) {
af22f94a 1850 ret = nfs_may_open(state->inode,
1b45c46c
TM		 1851 state->owner->so_cred,
1852 nd->intent.open.flags);
1853 if (ret < 0)
1854 goto out_close;
1855 }
4a35bd41 1856 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
02a913a7
TM		 1857 if (!IS_ERR(filp)) {
1858 struct nfs_open_context *ctx;
cd3758e3 1859 ctx = nfs_file_open_context(filp);
02a913a7 1860 ctx->state = state;
95cf959b
TM		 1861 return 0;
1862 }
1b45c46c
TM		 1863 ret = PTR_ERR(filp);
1864out_close:
dc0b027d 1865 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1b45c46c 1866 return ret;
02a913a7
TM		 1867}
1868
1869struct dentry *
1da177e4
LT		 1870nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1871{
ad389da7 1872 struct path path = {
4ac91378 1873 .mnt = nd->path.mnt,
ad389da7
TM		 1874 .dentry = dentry,
1875 };
4ac91378 1876 struct dentry *parent;
1da177e4
LT		 1877 struct iattr attr;
1878 struct rpc_cred *cred;
1879 struct nfs4_state *state;
02a913a7 1880 struct dentry *res;
dc0b027d 1881 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1da177e4
LT		 1882
1883 if (nd->flags & LOOKUP_CREATE) {
1884 attr.ia_mode = nd->intent.open.create_mode;
1885 attr.ia_valid = ATTR_MODE;
1886 if (!IS_POSIXACL(dir))
ce3b0f8d 1887 attr.ia_mode &= ~current_umask();
1da177e4
LT		 1888 } else {
1889 attr.ia_valid = 0;
1890 BUG_ON(nd->intent.open.flags & O_CREAT);
1891 }
1892
98a8e323 1893 cred = rpc_lookup_cred();
1da177e4 1894 if (IS_ERR(cred))
02a913a7 1895 return (struct dentry *)cred;
565277f6
TM		 1896 parent = dentry->d_parent;
1897 /* Protect against concurrent sillydeletes */
1898 nfs_block_sillyrename(parent);
dc0b027d 1899 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1da177e4 1900 put_rpccred(cred);
02a913a7 1901 if (IS_ERR(state)) {
d75340cc 1902 if (PTR_ERR(state) == -ENOENT) {
02a913a7 1903 d_add(dentry, NULL);
d75340cc
TM		 1904 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1905 }
565277f6 1906 nfs_unblock_sillyrename(parent);
02a913a7
TM		 1907 return (struct dentry *)state;
1908 }
24ac23ab 1909 res = d_add_unique(dentry, igrab(state->inode));
02a913a7 1910 if (res != NULL)
deee9369 1911 path.dentry = res;
d75340cc 1912 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
565277f6 1913 nfs_unblock_sillyrename(parent);
dc0b027d 1914 nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 1915 return res;
1da177e4
LT		 1916}
1917
1918int
02a913a7 1919nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1da177e4 1920{
ad389da7 1921 struct path path = {
4ac91378 1922 .mnt = nd->path.mnt,
ad389da7
TM		 1923 .dentry = dentry,
1924 };
1da177e4
LT		 1925 struct rpc_cred *cred;
1926 struct nfs4_state *state;
dc0b027d 1927 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1da177e4 1928
98a8e323 1929 cred = rpc_lookup_cred();
1da177e4
LT		 1930 if (IS_ERR(cred))
1931 return PTR_ERR(cred);
dc0b027d 1932 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1da177e4 1933 put_rpccred(cred);
02a913a7
TM		 1934 if (IS_ERR(state)) {
1935 switch (PTR_ERR(state)) {
1936 case -EPERM:
1937 case -EACCES:
1938 case -EDQUOT:
1939 case -ENOSPC:
1940 case -EROFS:
1941 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1942 return 1;
b87c0adf
CL		 1943 default:
1944 goto out_drop;
02a913a7 1945 }
02a913a7 1946 }
24ac23ab 1947 if (state->inode == dentry->d_inode) {
d75340cc 1948 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
dc0b027d 1949 nfs4_intent_set_file(nd, &path, state, fmode);
1da177e4
LT		 1950 return 1;
1951 }
dc0b027d 1952 nfs4_close_sync(&path, state, fmode);
02a913a7
TM		 1953out_drop:
1954 d_drop(dentry);
1da177e4
LT		 1955 return 0;
1956}
1957
7fe5c398
TM		 1958void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1959{
1960 if (ctx->state == NULL)
1961 return;
1962 if (is_sync)
1963 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1964 else
1965 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1966}
1da177e4
LT		 1967
1968static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1969{
43652ad5
BH		 1970 struct nfs4_server_caps_arg args = {
1971 .fhandle = fhandle,
1972 };
1da177e4
LT		 1973 struct nfs4_server_caps_res res = {};
1974 struct rpc_message msg = {
1975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 1976 .rpc_argp = &args,
1da177e4
LT		 1977 .rpc_resp = &res,
1978 };
1979 int status;
1980
cccef3b9 1981 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 1982 if (status == 0) {
1983 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1984 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1985 server->caps |= NFS_CAP_ACLS;
1986 if (res.has_links != 0)
1987 server->caps |= NFS_CAP_HARDLINKS;
1988 if (res.has_symlinks != 0)
1989 server->caps |= NFS_CAP_SYMLINKS;
a65318bf
TM		 1990 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1991 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1992 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4
LT		 1993 server->acl_bitmask = res.acl_bitmask;
1994 }
cccef3b9 1995
1da177e4
LT		 1996 return status;
1997}
1998
55a97593 1999int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2000{
2001 struct nfs4_exception exception = { };
2002 int err;
2003 do {
2004 err = nfs4_handle_exception(server,
2005 _nfs4_server_capabilities(server, fhandle),
2006 &exception);
2007 } while (exception.retry);
2008 return err;
2009}
2010
2011static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2012 struct nfs_fsinfo *info)
2013{
1da177e4
LT		 2014 struct nfs4_lookup_root_arg args = {
2015 .bitmask = nfs4_fattr_bitmap,
2016 };
2017 struct nfs4_lookup_res res = {
2018 .server = server,
0e574af1 2019 .fattr = info->fattr,
1da177e4
LT		 2020 .fh = fhandle,
2021 };
2022 struct rpc_message msg = {
2023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2024 .rpc_argp = &args,
2025 .rpc_resp = &res,
2026 };
0e574af1 2027 nfs_fattr_init(info->fattr);
cccef3b9 2028 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2029}
2030
2031static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2032 struct nfs_fsinfo *info)
2033{
2034 struct nfs4_exception exception = { };
2035 int err;
2036 do {
2037 err = nfs4_handle_exception(server,
2038 _nfs4_lookup_root(server, fhandle, info),
2039 &exception);
2040 } while (exception.retry);
2041 return err;
2042}
2043
54ceac45
DH		 2044/*
2045 * get the file handle for the "/" directory on the server
2046 */
1da177e4 2047static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2048 struct nfs_fsinfo *info)
1da177e4 2049{
1da177e4
LT		 2050 int status;
2051
1da177e4 2052 status = nfs4_lookup_root(server, fhandle, info);
1da177e4
LT		 2053 if (status == 0)
2054 status = nfs4_server_capabilities(server, fhandle);
2055 if (status == 0)
2056 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2057 return nfs4_map_errors(status);
1da177e4
LT		 2058}
2059
6b97fd3d
MN		 2060/*
2061 * Get locations and (maybe) other attributes of a referral.
2062 * Note that we'll actually follow the referral later when
2063 * we detect fsid mismatch in inode revalidation
2064 */
56659e99 2065static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
6b97fd3d
MN		 2066{
2067 int status = -ENOMEM;
2068 struct page *page = NULL;
2069 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2070
2071 page = alloc_page(GFP_KERNEL);
2072 if (page == NULL)
2073 goto out;
2074 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2075 if (locations == NULL)
2076 goto out;
2077
c228fd3a 2078 status = nfs4_proc_fs_locations(dir, name, locations, page);
6b97fd3d
MN		 2079 if (status != 0)
2080 goto out;
2081 /* Make sure server returned a different fsid for the referral */
2082 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3110ff80 2083 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2084 status = -EIO;
2085 goto out;
2086 }
2087
2088 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2089 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2090 if (!fattr->mode)
2091 fattr->mode = S_IFDIR;
2092 memset(fhandle, 0, sizeof(struct nfs_fh));
2093out:
2094 if (page)
2095 __free_page(page);
2096 if (locations)
2097 kfree(locations);
2098 return status;
2099}
2100
1da177e4
LT		 2101static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2102{
2103 struct nfs4_getattr_arg args = {
2104 .fh = fhandle,
2105 .bitmask = server->attr_bitmask,
2106 };
2107 struct nfs4_getattr_res res = {
2108 .fattr = fattr,
2109 .server = server,
2110 };
2111 struct rpc_message msg = {
2112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2113 .rpc_argp = &args,
2114 .rpc_resp = &res,
2115 };
2116
0e574af1 2117 nfs_fattr_init(fattr);
cccef3b9 2118 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2119}
2120
2121static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2122{
2123 struct nfs4_exception exception = { };
2124 int err;
2125 do {
2126 err = nfs4_handle_exception(server,
2127 _nfs4_proc_getattr(server, fhandle, fattr),
2128 &exception);
2129 } while (exception.retry);
2130 return err;
2131}
2132
2133/*
2134 * The file is not closed if it is opened due to the a request to change
2135 * the size of the file. The open call will not be needed once the
2136 * VFS layer lookup-intents are implemented.
2137 *
2138 * Close is called when the inode is destroyed.
2139 * If we haven't opened the file for O_WRONLY, we
2140 * need to in the size_change case to obtain a stateid.
2141 *
2142 * Got race?
2143 * Because OPEN is always done by name in nfsv4, it is
2144 * possible that we opened a different file by the same
2145 * name. We can recognize this race condition, but we
2146 * can't do anything about it besides returning an error.
2147 *
2148 * This will be fixed with VFS changes (lookup-intent).
2149 */
2150static int
2151nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2152 struct iattr *sattr)
2153{
08e9eac4 2154 struct inode *inode = dentry->d_inode;
659bfcd6 2155 struct rpc_cred *cred = NULL;
d530838b 2156 struct nfs4_state *state = NULL;
1da177e4
LT		 2157 int status;
2158
0e574af1 2159 nfs_fattr_init(fattr);
1da177e4 2160
d530838b 2161 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2162 if (sattr->ia_valid & ATTR_FILE) {
2163 struct nfs_open_context *ctx;
2164
2165 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2166 if (ctx) {
2167 cred = ctx->cred;
2168 state = ctx->state;
2169 }
659bfcd6 2170 }
08e9eac4 2171
659bfcd6 2172 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2173 if (status == 0)
2174 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2175 return status;
2176}
2177
56659e99
TM		 2178static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2179 const struct qstr *name, struct nfs_fh *fhandle,
2b3de441
DH		 2180 struct nfs_fattr *fattr)
2181{
2182 int status;
2183 struct nfs4_lookup_arg args = {
2184 .bitmask = server->attr_bitmask,
2185 .dir_fh = dirfh,
2186 .name = name,
2187 };
2188 struct nfs4_lookup_res res = {
2189 .server = server,
2190 .fattr = fattr,
2191 .fh = fhandle,
2192 };
2193 struct rpc_message msg = {
2194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2195 .rpc_argp = &args,
2196 .rpc_resp = &res,
2197 };
2198
2199 nfs_fattr_init(fattr);
2200
2201 dprintk("NFS call lookupfh %s\n", name->name);
cccef3b9 2202 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2b3de441 2203 dprintk("NFS reply lookupfh: %d\n", status);
2b3de441
DH		 2204 return status;
2205}
2206
2207static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2208 struct qstr *name, struct nfs_fh *fhandle,
2209 struct nfs_fattr *fattr)
2210{
2211 struct nfs4_exception exception = { };
2212 int err;
2213 do {
4e56e082
TM		 2214 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2215 /* FIXME: !!!! */
2216 if (err == -NFS4ERR_MOVED) {
2217 err = -EREMOTE;
2218 break;
2219 }
2220 err = nfs4_handle_exception(server, err, &exception);
2b3de441
DH		 2221 } while (exception.retry);
2222 return err;
2223}
2224
56659e99 2225static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1da177e4
LT		 2226 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2227{
4e56e082 2228 int status;
1da177e4
LT		 2229
2230 dprintk("NFS call lookup %s\n", name->name);
4e56e082 2231 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
6b97fd3d
MN		 2232 if (status == -NFS4ERR_MOVED)
2233 status = nfs4_get_referral(dir, name, fattr, fhandle);
1da177e4
LT		 2234 dprintk("NFS reply lookup: %d\n", status);
2235 return status;
2236}
2237
2238static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2239{
2240 struct nfs4_exception exception = { };
2241 int err;
2242 do {
2243 err = nfs4_handle_exception(NFS_SERVER(dir),
2244 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2245 &exception);
2246 } while (exception.retry);
2247 return err;
2248}
2249
2250static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2251{
76b32999
TM		 2252 struct nfs_server *server = NFS_SERVER(inode);
2253 struct nfs_fattr fattr;
1da177e4
LT		 2254 struct nfs4_accessargs args = {
2255 .fh = NFS_FH(inode),
76b32999
TM		 2256 .bitmask = server->attr_bitmask,
2257 };
2258 struct nfs4_accessres res = {
2259 .server = server,
2260 .fattr = &fattr,
1da177e4 2261 };
1da177e4
LT		 2262 struct rpc_message msg = {
2263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2264 .rpc_argp = &args,
2265 .rpc_resp = &res,
2266 .rpc_cred = entry->cred,
2267 };
2268 int mode = entry->mask;
2269 int status;
2270
2271 /*
2272 * Determine which access bits we want to ask for...
2273 */
2274 if (mode & MAY_READ)
2275 args.access |= NFS4_ACCESS_READ;
2276 if (S_ISDIR(inode->i_mode)) {
2277 if (mode & MAY_WRITE)
2278 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2279 if (mode & MAY_EXEC)
2280 args.access |= NFS4_ACCESS_LOOKUP;
2281 } else {
2282 if (mode & MAY_WRITE)
2283 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2284 if (mode & MAY_EXEC)
2285 args.access |= NFS4_ACCESS_EXECUTE;
2286 }
76b32999 2287 nfs_fattr_init(&fattr);
cccef3b9 2288 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2289 if (!status) {
2290 entry->mask = 0;
2291 if (res.access & NFS4_ACCESS_READ)
2292 entry->mask |= MAY_READ;
2293 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2294 entry->mask |= MAY_WRITE;
2295 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2296 entry->mask |= MAY_EXEC;
76b32999 2297 nfs_refresh_inode(inode, &fattr);
1da177e4
LT		 2298 }
2299 return status;
2300}
2301
2302static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2303{
2304 struct nfs4_exception exception = { };
2305 int err;
2306 do {
2307 err = nfs4_handle_exception(NFS_SERVER(inode),
2308 _nfs4_proc_access(inode, entry),
2309 &exception);
2310 } while (exception.retry);
2311 return err;
2312}
2313
2314/*
2315 * TODO: For the time being, we don't try to get any attributes
2316 * along with any of the zero-copy operations READ, READDIR,
2317 * READLINK, WRITE.
2318 *
2319 * In the case of the first three, we want to put the GETATTR
2320 * after the read-type operation -- this is because it is hard
2321 * to predict the length of a GETATTR response in v4, and thus
2322 * align the READ data correctly. This means that the GETATTR
2323 * may end up partially falling into the page cache, and we should
2324 * shift it into the 'tail' of the xdr_buf before processing.
2325 * To do this efficiently, we need to know the total length
2326 * of data received, which doesn't seem to be available outside
2327 * of the RPC layer.
2328 *
2329 * In the case of WRITE, we also want to put the GETATTR after
2330 * the operation -- in this case because we want to make sure
2331 * we get the post-operation mtime and size. This means that
2332 * we can't use xdr_encode_pages() as written: we need a variant
2333 * of it which would leave room in the 'tail' iovec.
2334 *
2335 * Both of these changes to the XDR layer would in fact be quite
2336 * minor, but I decided to leave them for a subsequent patch.
2337 */
2338static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2339 unsigned int pgbase, unsigned int pglen)
2340{
2341 struct nfs4_readlink args = {
2342 .fh = NFS_FH(inode),
2343 .pgbase = pgbase,
2344 .pglen = pglen,
2345 .pages = &page,
2346 };
f50c7000 2347 struct nfs4_readlink_res res;
1da177e4
LT		 2348 struct rpc_message msg = {
2349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2350 .rpc_argp = &args,
f50c7000 2351 .rpc_resp = &res,
1da177e4
LT		 2352 };
2353
cccef3b9 2354 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
1da177e4
LT		 2355}
2356
2357static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2358 unsigned int pgbase, unsigned int pglen)
2359{
2360 struct nfs4_exception exception = { };
2361 int err;
2362 do {
2363 err = nfs4_handle_exception(NFS_SERVER(inode),
2364 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2365 &exception);
2366 } while (exception.retry);
2367 return err;
2368}
2369
1da177e4
LT		 2370/*
2371 * Got race?
2372 * We will need to arrange for the VFS layer to provide an atomic open.
2373 * Until then, this create/open method is prone to inefficiency and race
2374 * conditions due to the lookup, create, and open VFS calls from sys_open()
2375 * placed on the wire.
2376 *
2377 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2378 * The file will be opened again in the subsequent VFS open call
2379 * (nfs4_proc_file_open).
2380 *
2381 * The open for read will just hang around to be used by any process that
2382 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2383 */
2384
2385static int
2386nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
02a913a7 2387 int flags, struct nameidata *nd)
1da177e4 2388{
ad389da7 2389 struct path path = {
4ac91378 2390 .mnt = nd->path.mnt,
ad389da7
TM		 2391 .dentry = dentry,
2392 };
1da177e4
LT		 2393 struct nfs4_state *state;
2394 struct rpc_cred *cred;
dc0b027d 2395 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
1da177e4
LT		 2396 int status = 0;
2397
98a8e323 2398 cred = rpc_lookup_cred();
1da177e4
LT		 2399 if (IS_ERR(cred)) {
2400 status = PTR_ERR(cred);
2401 goto out;
2402 }
dc0b027d 2403 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
d4d9cdcb 2404 d_drop(dentry);
1da177e4
LT		 2405 if (IS_ERR(state)) {
2406 status = PTR_ERR(state);
659bfcd6 2407 goto out_putcred;
1da177e4 2408 }
d4d9cdcb 2409 d_add(dentry, igrab(state->inode));
d75340cc 2410 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1da177e4
LT		 2411 if (flags & O_EXCL) {
2412 struct nfs_fattr fattr;
659bfcd6 2413 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
02a913a7 2414 if (status == 0)
65e4308d 2415 nfs_setattr_update_inode(state->inode, sattr);
aa53ed54 2416 nfs_post_op_update_inode(state->inode, &fattr);
02a913a7 2417 }
ad389da7 2418 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
dc0b027d 2419 status = nfs4_intent_set_file(nd, &path, state, fmode);
02a913a7 2420 else
dc0b027d 2421 nfs4_close_sync(&path, state, fmode);
659bfcd6
TM		 2422out_putcred:
2423 put_rpccred(cred);
1da177e4
LT		 2424out:
2425 return status;
2426}
2427
2428static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2429{
16e42959 2430 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2431 struct nfs_removeargs args = {
1da177e4 2432 .fh = NFS_FH(dir),
4fdc17b2
TM		 2433 .name.len = name->len,
2434 .name.name = name->name,
16e42959
TM		 2435 .bitmask = server->attr_bitmask,
2436 };
4fdc17b2 2437 struct nfs_removeres res = {
16e42959 2438 .server = server,
1da177e4 2439 };
1da177e4 2440 struct rpc_message msg = {
4fdc17b2
TM		 2441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2442 .rpc_argp = &args,
2443 .rpc_resp = &res,
1da177e4
LT		 2444 };
2445 int status;
2446
4fdc17b2 2447 nfs_fattr_init(&res.dir_attr);
cccef3b9 2448 status = nfs4_call_sync(server, &msg, &args, &res, 1);
16e42959
TM		 2449 if (status == 0) {
2450 update_changeattr(dir, &res.cinfo);
4fdc17b2 2451 nfs_post_op_update_inode(dir, &res.dir_attr);
16e42959 2452 }
1da177e4
LT		 2453 return status;
2454}
2455
2456static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2457{
2458 struct nfs4_exception exception = { };
2459 int err;
2460 do {
2461 err = nfs4_handle_exception(NFS_SERVER(dir),
2462 _nfs4_proc_remove(dir, name),
2463 &exception);
2464 } while (exception.retry);
2465 return err;
2466}
2467
e4eff1a6 2468static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2469{
e4eff1a6
TM		 2470 struct nfs_server *server = NFS_SERVER(dir);
2471 struct nfs_removeargs *args = msg->rpc_argp;
2472 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2473
a65318bf 2474 args->bitmask = server->cache_consistency_bitmask;
e4eff1a6 2475 res->server = server;
1da177e4 2476 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1da177e4
LT		 2477}
2478
e4eff1a6 2479static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2480{
e4eff1a6
TM		 2481 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2482
472cfbd9 2483 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
9e33bed5 2484 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6 2485 return 0;
472cfbd9 2486 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
e4eff1a6
TM		 2487 update_changeattr(dir, &res->cinfo);
2488 nfs_post_op_update_inode(dir, &res->dir_attr);
2489 return 1;
1da177e4
LT		 2490}
2491
2492static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2493 struct inode *new_dir, struct qstr *new_name)
2494{
6caf2c82 2495 struct nfs_server *server = NFS_SERVER(old_dir);
1da177e4
LT		 2496 struct nfs4_rename_arg arg = {
2497 .old_dir = NFS_FH(old_dir),
2498 .new_dir = NFS_FH(new_dir),
2499 .old_name = old_name,
2500 .new_name = new_name,
6caf2c82
TM		 2501 .bitmask = server->attr_bitmask,
2502 };
2503 struct nfs_fattr old_fattr, new_fattr;
2504 struct nfs4_rename_res res = {
2505 .server = server,
2506 .old_fattr = &old_fattr,
2507 .new_fattr = &new_fattr,
1da177e4 2508 };
1da177e4
LT		 2509 struct rpc_message msg = {
2510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2511 .rpc_argp = &arg,
2512 .rpc_resp = &res,
2513 };
2514 int status;
2515
6caf2c82
TM		 2516 nfs_fattr_init(res.old_fattr);
2517 nfs_fattr_init(res.new_fattr);
cccef3b9 2518 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1da177e4
LT		 2519
2520 if (!status) {
2521 update_changeattr(old_dir, &res.old_cinfo);
6caf2c82 2522 nfs_post_op_update_inode(old_dir, res.old_fattr);
1da177e4 2523 update_changeattr(new_dir, &res.new_cinfo);
6caf2c82 2524 nfs_post_op_update_inode(new_dir, res.new_fattr);
1da177e4
LT		 2525 }
2526 return status;
2527}
2528
2529static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2530 struct inode *new_dir, struct qstr *new_name)
2531{
2532 struct nfs4_exception exception = { };
2533 int err;
2534 do {
2535 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2536 _nfs4_proc_rename(old_dir, old_name,
2537 new_dir, new_name),
2538 &exception);
2539 } while (exception.retry);
2540 return err;
2541}
2542
2543static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2544{
91ba2eee 2545 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2546 struct nfs4_link_arg arg = {
2547 .fh = NFS_FH(inode),
2548 .dir_fh = NFS_FH(dir),
2549 .name = name,
91ba2eee
TM		 2550 .bitmask = server->attr_bitmask,
2551 };
2552 struct nfs_fattr fattr, dir_attr;
2553 struct nfs4_link_res res = {
2554 .server = server,
2555 .fattr = &fattr,
2556 .dir_attr = &dir_attr,
1da177e4 2557 };
1da177e4
LT		 2558 struct rpc_message msg = {
2559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2560 .rpc_argp = &arg,
91ba2eee 2561 .rpc_resp = &res,
1da177e4
LT		 2562 };
2563 int status;
2564
91ba2eee
TM		 2565 nfs_fattr_init(res.fattr);
2566 nfs_fattr_init(res.dir_attr);
cccef3b9 2567 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
91ba2eee
TM		 2568 if (!status) {
2569 update_changeattr(dir, &res.cinfo);
2570 nfs_post_op_update_inode(dir, res.dir_attr);
73a3d07c 2571 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 2572 }
1da177e4
LT		 2573
2574 return status;
2575}
2576
2577static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2578{
2579 struct nfs4_exception exception = { };
2580 int err;
2581 do {
2582 err = nfs4_handle_exception(NFS_SERVER(inode),
2583 _nfs4_proc_link(inode, dir, name),
2584 &exception);
2585 } while (exception.retry);
2586 return err;
2587}
2588
57dc9a57
TM		 2589struct nfs4_createdata {
2590 struct rpc_message msg;
2591 struct nfs4_create_arg arg;
2592 struct nfs4_create_res res;
2593 struct nfs_fh fh;
2594 struct nfs_fattr fattr;
2595 struct nfs_fattr dir_fattr;
2596};
2597
2598static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2599 struct qstr *name, struct iattr *sattr, u32 ftype)
2600{
2601 struct nfs4_createdata *data;
2602
2603 data = kzalloc(sizeof(*data), GFP_KERNEL);
2604 if (data != NULL) {
2605 struct nfs_server *server = NFS_SERVER(dir);
2606
2607 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2608 data->msg.rpc_argp = &data->arg;
2609 data->msg.rpc_resp = &data->res;
2610 data->arg.dir_fh = NFS_FH(dir);
2611 data->arg.server = server;
2612 data->arg.name = name;
2613 data->arg.attrs = sattr;
2614 data->arg.ftype = ftype;
2615 data->arg.bitmask = server->attr_bitmask;
2616 data->res.server = server;
2617 data->res.fh = &data->fh;
2618 data->res.fattr = &data->fattr;
2619 data->res.dir_fattr = &data->dir_fattr;
2620 nfs_fattr_init(data->res.fattr);
2621 nfs_fattr_init(data->res.dir_fattr);
2622 }
2623 return data;
2624}
2625
2626static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2627{
cccef3b9
AA		 2628 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2629 &data->arg, &data->res, 1);
57dc9a57
TM		 2630 if (status == 0) {
2631 update_changeattr(dir, &data->res.dir_cinfo);
2632 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2633 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2634 }
2635 return status;
2636}
2637
2638static void nfs4_free_createdata(struct nfs4_createdata *data)
2639{
2640 kfree(data);
2641}
2642
4f390c15 2643static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2644 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 2645{
57dc9a57
TM		 2646 struct nfs4_createdata *data;
2647 int status = -ENAMETOOLONG;
1da177e4 2648
94a6d753 2649 if (len > NFS4_MAXPATHLEN)
57dc9a57 2650 goto out;
4f390c15 2651
57dc9a57
TM		 2652 status = -ENOMEM;
2653 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2654 if (data == NULL)
2655 goto out;
2656
2657 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2658 data->arg.u.symlink.pages = &page;
2659 data->arg.u.symlink.len = len;
1da177e4 2660
57dc9a57
TM		 2661 status = nfs4_do_create(dir, dentry, data);
2662
2663 nfs4_free_createdata(data);
2664out:
1da177e4
LT		 2665 return status;
2666}
2667
4f390c15 2668static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 2669 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 2670{
2671 struct nfs4_exception exception = { };
2672 int err;
2673 do {
2674 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 2675 _nfs4_proc_symlink(dir, dentry, page,
2676 len, sattr),
1da177e4
LT		 2677 &exception);
2678 } while (exception.retry);
2679 return err;
2680}
2681
2682static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2683 struct iattr *sattr)
2684{
57dc9a57
TM		 2685 struct nfs4_createdata *data;
2686 int status = -ENOMEM;
1da177e4 2687
57dc9a57
TM		 2688 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2689 if (data == NULL)
2690 goto out;
2691
2692 status = nfs4_do_create(dir, dentry, data);
2693
2694 nfs4_free_createdata(data);
2695out:
1da177e4
LT		 2696 return status;
2697}
2698
2699static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2700 struct iattr *sattr)
2701{
2702 struct nfs4_exception exception = { };
2703 int err;
2704 do {
2705 err = nfs4_handle_exception(NFS_SERVER(dir),
2706 _nfs4_proc_mkdir(dir, dentry, sattr),
2707 &exception);
2708 } while (exception.retry);
2709 return err;
2710}
2711
2712static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2713 u64 cookie, struct page *page, unsigned int count, int plus)
2714{
2715 struct inode *dir = dentry->d_inode;
2716 struct nfs4_readdir_arg args = {
2717 .fh = NFS_FH(dir),
2718 .pages = &page,
2719 .pgbase = 0,
2720 .count = count,
a65318bf 2721 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
1da177e4
LT		 2722 };
2723 struct nfs4_readdir_res res;
2724 struct rpc_message msg = {
2725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2726 .rpc_argp = &args,
2727 .rpc_resp = &res,
2728 .rpc_cred = cred,
2729 };
2730 int status;
2731
3110ff80 2732 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 2733 dentry->d_parent->d_name.name,
2734 dentry->d_name.name,
2735 (unsigned long long)cookie);
1da177e4
LT		 2736 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2737 res.pgbase = args.pgbase;
cccef3b9 2738 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
1da177e4
LT		 2739 if (status == 0)
2740 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
c4812998
TM		 2741
2742 nfs_invalidate_atime(dir);
2743
3110ff80 2744 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 2745 return status;
2746}
2747
2748static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2749 u64 cookie, struct page *page, unsigned int count, int plus)
2750{
2751 struct nfs4_exception exception = { };
2752 int err;
2753 do {
2754 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2755 _nfs4_proc_readdir(dentry, cred, cookie,
2756 page, count, plus),
2757 &exception);
2758 } while (exception.retry);
2759 return err;
2760}
2761
2762static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2763 struct iattr *sattr, dev_t rdev)
2764{
57dc9a57
TM		 2765 struct nfs4_createdata *data;
2766 int mode = sattr->ia_mode;
2767 int status = -ENOMEM;
1da177e4
LT		 2768
2769 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2770 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
57dc9a57
TM		 2771
2772 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2773 if (data == NULL)
2774 goto out;
2775
1da177e4 2776 if (S_ISFIFO(mode))
57dc9a57 2777 data->arg.ftype = NF4FIFO;
1da177e4 2778 else if (S_ISBLK(mode)) {
57dc9a57
TM		 2779 data->arg.ftype = NF4BLK;
2780 data->arg.u.device.specdata1 = MAJOR(rdev);
2781 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 2782 }
2783 else if (S_ISCHR(mode)) {
57dc9a57
TM		 2784 data->arg.ftype = NF4CHR;
2785 data->arg.u.device.specdata1 = MAJOR(rdev);
2786 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4 2787 }
1da177e4 2788
57dc9a57
TM		 2789 status = nfs4_do_create(dir, dentry, data);
2790
2791 nfs4_free_createdata(data);
2792out:
1da177e4
LT		 2793 return status;
2794}
2795
2796static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2797 struct iattr *sattr, dev_t rdev)
2798{
2799 struct nfs4_exception exception = { };
2800 int err;
2801 do {
2802 err = nfs4_handle_exception(NFS_SERVER(dir),
2803 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2804 &exception);
2805 } while (exception.retry);
2806 return err;
2807}
2808
2809static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2810 struct nfs_fsstat *fsstat)
2811{
2812 struct nfs4_statfs_arg args = {
2813 .fh = fhandle,
2814 .bitmask = server->attr_bitmask,
2815 };
24ad148a
BH		 2816 struct nfs4_statfs_res res = {
2817 .fsstat = fsstat,
2818 };
1da177e4
LT		 2819 struct rpc_message msg = {
2820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2821 .rpc_argp = &args,
24ad148a 2822 .rpc_resp = &res,
1da177e4
LT		 2823 };
2824
0e574af1 2825 nfs_fattr_init(fsstat->fattr);
cccef3b9 2826 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2827}
2828
2829static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2830{
2831 struct nfs4_exception exception = { };
2832 int err;
2833 do {
2834 err = nfs4_handle_exception(server,
2835 _nfs4_proc_statfs(server, fhandle, fsstat),
2836 &exception);
2837 } while (exception.retry);
2838 return err;
2839}
2840
2841static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2842 struct nfs_fsinfo *fsinfo)
2843{
2844 struct nfs4_fsinfo_arg args = {
2845 .fh = fhandle,
2846 .bitmask = server->attr_bitmask,
2847 };
3dda5e43
BH		 2848 struct nfs4_fsinfo_res res = {
2849 .fsinfo = fsinfo,
2850 };
1da177e4
LT		 2851 struct rpc_message msg = {
2852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2853 .rpc_argp = &args,
3dda5e43 2854 .rpc_resp = &res,
1da177e4
LT		 2855 };
2856
cccef3b9 2857 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2858}
2859
2860static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2861{
2862 struct nfs4_exception exception = { };
2863 int err;
2864
2865 do {
2866 err = nfs4_handle_exception(server,
2867 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2868 &exception);
2869 } while (exception.retry);
2870 return err;
2871}
2872
2873static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2874{
0e574af1 2875 nfs_fattr_init(fsinfo->fattr);
1da177e4
LT		 2876 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2877}
2878
2879static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2880 struct nfs_pathconf *pathconf)
2881{
2882 struct nfs4_pathconf_arg args = {
2883 .fh = fhandle,
2884 .bitmask = server->attr_bitmask,
2885 };
d45b2989
BH		 2886 struct nfs4_pathconf_res res = {
2887 .pathconf = pathconf,
2888 };
1da177e4
LT		 2889 struct rpc_message msg = {
2890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2891 .rpc_argp = &args,
d45b2989 2892 .rpc_resp = &res,
1da177e4
LT		 2893 };
2894
2895 /* None of the pathconf attributes are mandatory to implement */
2896 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2897 memset(pathconf, 0, sizeof(*pathconf));
2898 return 0;
2899 }
2900
0e574af1 2901 nfs_fattr_init(pathconf->fattr);
cccef3b9 2902 return nfs4_call_sync(server, &msg, &args, &res, 0);
1da177e4
LT		 2903}
2904
2905static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2906 struct nfs_pathconf *pathconf)
2907{
2908 struct nfs4_exception exception = { };
2909 int err;
2910
2911 do {
2912 err = nfs4_handle_exception(server,
2913 _nfs4_proc_pathconf(server, fhandle, pathconf),
2914 &exception);
2915 } while (exception.retry);
2916 return err;
2917}
2918
ec06c096 2919static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 2920{
ec06c096 2921 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2922
f11c88af
AA		 2923 dprintk("--> %s\n", __func__);
2924
2925 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2926 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2927
9e33bed5 2928 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
eedc020e 2929 nfs4_restart_rpc(task, server->nfs_client);
ec06c096 2930 return -EAGAIN;
1da177e4 2931 }
8850df99
TM		 2932
2933 nfs_invalidate_atime(data->inode);
1da177e4 2934 if (task->tk_status > 0)
ec06c096
TM		 2935 renew_lease(server, data->timestamp);
2936 return 0;
1da177e4
LT		 2937}
2938
bdc7f021 2939static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 2940{
1da177e4 2941 data->timestamp = jiffies;
bdc7f021 2942 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
1da177e4
LT		 2943}
2944
788e7a89 2945static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2946{
1da177e4
LT		 2947 struct inode *inode = data->inode;
2948
def6ed7e
AA		 2949 /* slot is freed in nfs_writeback_done */
2950 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2951 task->tk_status);
2952
9e33bed5 2953 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
eedc020e 2954 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2955 return -EAGAIN;
1da177e4 2956 }
4f9838c7 2957 if (task->tk_status >= 0) {
1da177e4 2958 renew_lease(NFS_SERVER(inode), data->timestamp);
70ca8852 2959 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
4f9838c7 2960 }
788e7a89 2961 return 0;
1da177e4
LT		 2962}
2963
bdc7f021 2964static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2965{
bdc7f021
TM		 2966 struct nfs_server *server = NFS_SERVER(data->inode);
2967
a65318bf 2968 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2969 data->res.server = server;
1da177e4
LT		 2970 data->timestamp = jiffies;
2971
bdc7f021 2972 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
1da177e4
LT		 2973}
2974
788e7a89 2975static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 2976{
1da177e4
LT		 2977 struct inode *inode = data->inode;
2978
21d9a851
AA		 2979 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2980 task->tk_status);
9e33bed5 2981 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
eedc020e 2982 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
788e7a89 2983 return -EAGAIN;
1da177e4 2984 }
21d9a851
AA		 2985 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
2986 &data->res.seq_res);
9e08a3c5 2987 nfs_refresh_inode(inode, data->res.fattr);
788e7a89 2988 return 0;
1da177e4
LT		 2989}
2990
bdc7f021 2991static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 2992{
788e7a89 2993 struct nfs_server *server = NFS_SERVER(data->inode);
1da177e4 2994
a65318bf 2995 data->args.bitmask = server->cache_consistency_bitmask;
4f9838c7 2996 data->res.server = server;
bdc7f021 2997 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
1da177e4
LT		 2998}
2999
3000/*
3001 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3002 * standalone procedure for queueing an asynchronous RENEW.
3003 */
963d8fe5 3004static void nfs4_renew_done(struct rpc_task *task, void *data)
1da177e4 3005{
adfa6f98 3006 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
963d8fe5 3007 unsigned long timestamp = (unsigned long)data;
1da177e4
LT		 3008
3009 if (task->tk_status < 0) {
95baa25c
TM		 3010 /* Unless we're shutting down, schedule state recovery! */
3011 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3012 nfs4_schedule_state_recovery(clp);
1da177e4
LT		 3013 return;
3014 }
3015 spin_lock(&clp->cl_lock);
3016 if (time_before(clp->cl_last_renewal,timestamp))
3017 clp->cl_last_renewal = timestamp;
3018 spin_unlock(&clp->cl_lock);
29fba38b
BH		 3019 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3020 task->tk_msg.rpc_cred);
3021 put_rpccred(task->tk_msg.rpc_cred);
1da177e4
LT		 3022}
3023
963d8fe5
TM		 3024static const struct rpc_call_ops nfs4_renew_ops = {
3025 .rpc_call_done = nfs4_renew_done,
3026};
3027
adfa6f98 3028int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3029{
3030 struct rpc_message msg = {
3031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3032 .rpc_argp = clp,
b4454fe1 3033 .rpc_cred = cred,
1da177e4
LT		 3034 };
3035
3036 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
963d8fe5 3037 &nfs4_renew_ops, (void *)jiffies);
1da177e4
LT		 3038}
3039
adfa6f98 3040int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3041{
3042 struct rpc_message msg = {
3043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3044 .rpc_argp = clp,
b4454fe1 3045 .rpc_cred = cred,
1da177e4
LT		 3046 };
3047 unsigned long now = jiffies;
3048 int status;
3049
3050 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3051 if (status < 0)
3052 return status;
3053 spin_lock(&clp->cl_lock);
3054 if (time_before(clp->cl_last_renewal,now))
3055 clp->cl_last_renewal = now;
3056 spin_unlock(&clp->cl_lock);
3057 return 0;
3058}
3059
aa1870af
BF		 3060static inline int nfs4_server_supports_acls(struct nfs_server *server)
3061{
3062 return (server->caps & NFS_CAP_ACLS)
3063 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3064 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3065}
3066
3067/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3068 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3069 * the stack.
3070 */
3071#define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3072
3073static void buf_to_pages(const void *buf, size_t buflen,
3074 struct page **pages, unsigned int *pgbase)
3075{
3076 const void *p = buf;
3077
3078 *pgbase = offset_in_page(buf);
3079 p -= *pgbase;
3080 while (p < buf + buflen) {
3081 *(pages++) = virt_to_page(p);
3082 p += PAGE_CACHE_SIZE;
3083 }
3084}
3085
e50a1c2e
BF		 3086struct nfs4_cached_acl {
3087 int cached;
3088 size_t len;
3e9d4154 3089 char data[0];
e50a1c2e
BF		 3090};
3091
3092static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3093{
3094 struct nfs_inode *nfsi = NFS_I(inode);
3095
3096 spin_lock(&inode->i_lock);
3097 kfree(nfsi->nfs4_acl);
3098 nfsi->nfs4_acl = acl;
3099 spin_unlock(&inode->i_lock);
3100}
3101
3102static void nfs4_zap_acl_attr(struct inode *inode)
3103{
3104 nfs4_set_cached_acl(inode, NULL);
3105}
3106
3107static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3108{
3109 struct nfs_inode *nfsi = NFS_I(inode);
3110 struct nfs4_cached_acl *acl;
3111 int ret = -ENOENT;
3112
3113 spin_lock(&inode->i_lock);
3114 acl = nfsi->nfs4_acl;
3115 if (acl == NULL)
3116 goto out;
3117 if (buf == NULL) /* user is just asking for length */
3118 goto out_len;
3119 if (acl->cached == 0)
3120 goto out;
3121 ret = -ERANGE; /* see getxattr(2) man page */
3122 if (acl->len > buflen)
3123 goto out;
3124 memcpy(buf, acl->data, acl->len);
3125out_len:
3126 ret = acl->len;
3127out:
3128 spin_unlock(&inode->i_lock);
3129 return ret;
3130}
3131
3132static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3133{
3134 struct nfs4_cached_acl *acl;
3135
3136 if (buf && acl_len <= PAGE_SIZE) {
3137 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3138 if (acl == NULL)
3139 goto out;
3140 acl->cached = 1;
3141 memcpy(acl->data, buf, acl_len);
3142 } else {
3143 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3144 if (acl == NULL)
3145 goto out;
3146 acl->cached = 0;
3147 }
3148 acl->len = acl_len;
3149out:
3150 nfs4_set_cached_acl(inode, acl);
3151}
3152
16b4289c 3153static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3154{
aa1870af
BF		 3155 struct page *pages[NFS4ACL_MAXPAGES];
3156 struct nfs_getaclargs args = {
3157 .fh = NFS_FH(inode),
3158 .acl_pages = pages,
3159 .acl_len = buflen,
3160 };
663c79b3
BH		 3161 struct nfs_getaclres res = {
3162 .acl_len = buflen,
3163 };
e50a1c2e 3164 void *resp_buf;
aa1870af
BF		 3165 struct rpc_message msg = {
3166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3167 .rpc_argp = &args,
663c79b3 3168 .rpc_resp = &res,
aa1870af 3169 };
e50a1c2e 3170 struct page *localpage = NULL;
aa1870af
BF		 3171 int ret;
3172
e50a1c2e
BF		 3173 if (buflen < PAGE_SIZE) {
3174 /* As long as we're doing a round trip to the server anyway,
3175 * let's be prepared for a page of acl data. */
3176 localpage = alloc_page(GFP_KERNEL);
3177 resp_buf = page_address(localpage);
3178 if (localpage == NULL)
3179 return -ENOMEM;
3180 args.acl_pages[0] = localpage;
3181 args.acl_pgbase = 0;
663c79b3 3182 args.acl_len = PAGE_SIZE;
e50a1c2e
BF		 3183 } else {
3184 resp_buf = buf;
3185 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3186 }
cccef3b9 3187 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
e50a1c2e
BF		 3188 if (ret)
3189 goto out_free;
663c79b3
BH		 3190 if (res.acl_len > args.acl_len)
3191 nfs4_write_cached_acl(inode, NULL, res.acl_len);
e50a1c2e 3192 else
663c79b3 3193 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
e50a1c2e
BF		 3194 if (buf) {
3195 ret = -ERANGE;
663c79b3 3196 if (res.acl_len > buflen)
e50a1c2e
BF		 3197 goto out_free;
3198 if (localpage)
663c79b3 3199 memcpy(buf, resp_buf, res.acl_len);
e50a1c2e 3200 }
663c79b3 3201 ret = res.acl_len;
e50a1c2e
BF		 3202out_free:
3203 if (localpage)
3204 __free_page(localpage);
aa1870af
BF		 3205 return ret;
3206}
3207
16b4289c
TM		 3208static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3209{
3210 struct nfs4_exception exception = { };
3211 ssize_t ret;
3212 do {
3213 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3214 if (ret >= 0)
3215 break;
3216 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3217 } while (exception.retry);
3218 return ret;
3219}
3220
e50a1c2e
BF		 3221static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3222{
3223 struct nfs_server *server = NFS_SERVER(inode);
3224 int ret;
3225
3226 if (!nfs4_server_supports_acls(server))
3227 return -EOPNOTSUPP;
3228 ret = nfs_revalidate_inode(server, inode);
3229 if (ret < 0)
3230 return ret;
f41f7418
TM		 3231 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3232 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3233 ret = nfs4_read_cached_acl(inode, buf, buflen);
3234 if (ret != -ENOENT)
3235 return ret;
3236 return nfs4_get_acl_uncached(inode, buf, buflen);
3237}
3238
16b4289c 3239static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3240{
3241 struct nfs_server *server = NFS_SERVER(inode);
3242 struct page *pages[NFS4ACL_MAXPAGES];
3243 struct nfs_setaclargs arg = {
3244 .fh = NFS_FH(inode),
3245 .acl_pages = pages,
3246 .acl_len = buflen,
3247 };
73c403a9 3248 struct nfs_setaclres res;
4b580ee3
BF		 3249 struct rpc_message msg = {
3250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3251 .rpc_argp = &arg,
73c403a9 3252 .rpc_resp = &res,
4b580ee3
BF		 3253 };
3254 int ret;
3255
3256 if (!nfs4_server_supports_acls(server))
3257 return -EOPNOTSUPP;
642ac549 3258 nfs_inode_return_delegation(inode);
4b580ee3 3259 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
cccef3b9 3260 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
f41f7418
TM		 3261 nfs_access_zap_cache(inode);
3262 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3263 return ret;
3264}
3265
16b4289c
TM		 3266static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3267{
3268 struct nfs4_exception exception = { };
3269 int err;
3270 do {
3271 err = nfs4_handle_exception(NFS_SERVER(inode),
3272 __nfs4_proc_set_acl(inode, buf, buflen),
3273 &exception);
3274 } while (exception.retry);
3275 return err;
3276}
3277
1da177e4 3278static int
8328d59f 3279_nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
1da177e4 3280{
1da177e4
LT		 3281 if (!clp || task->tk_status >= 0)
3282 return 0;
3283 switch(task->tk_status) {
9e33bed5
TM		 3284 case -NFS4ERR_ADMIN_REVOKED:
3285 case -NFS4ERR_BAD_STATEID:
3286 case -NFS4ERR_OPENMODE:
3287 if (state == NULL)
3288 break;
3289 nfs4_state_mark_reclaim_nograce(clp, state);
1da177e4
LT		 3290 case -NFS4ERR_STALE_CLIENTID:
3291 case -NFS4ERR_STALE_STATEID:
3292 case -NFS4ERR_EXPIRED:
5d00837b 3293 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
1da177e4 3294 nfs4_schedule_state_recovery(clp);
e005e804 3295 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
fda13939 3296 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
1da177e4
LT		 3297 task->tk_status = 0;
3298 return -EAGAIN;
4745e315
AA		 3299#if defined(CONFIG_NFS_V4_1)
3300 case -NFS4ERR_BADSESSION:
3301 case -NFS4ERR_BADSLOT:
3302 case -NFS4ERR_BAD_HIGH_SLOT:
3303 case -NFS4ERR_DEADSESSION:
3304 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3305 case -NFS4ERR_SEQ_FALSE_RETRY:
3306 case -NFS4ERR_SEQ_MISORDERED:
3307 dprintk("%s ERROR %d, Reset session\n", __func__,
3308 task->tk_status);
3309 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3310 task->tk_status = 0;
3311 return -EAGAIN;
3312#endif /* CONFIG_NFS_V4_1 */
1da177e4 3313 case -NFS4ERR_DELAY:
8328d59f
AA		 3314 if (server)
3315 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3316 case -NFS4ERR_GRACE:
1da177e4
LT		 3317 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3318 task->tk_status = 0;
3319 return -EAGAIN;
3320 case -NFS4ERR_OLD_STATEID:
3321 task->tk_status = 0;
3322 return -EAGAIN;
3323 }
3324 task->tk_status = nfs4_map_errors(task->tk_status);
3325 return 0;
3326}
3327
8328d59f
AA		 3328static int
3329nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3330{
3331 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3332}
3333
adfa6f98 3334int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
1da177e4
LT		 3335{
3336 nfs4_verifier sc_verifier;
3337 struct nfs4_setclientid setclientid = {
3338 .sc_verifier = &sc_verifier,
3339 .sc_prog = program,
3340 };
3341 struct rpc_message msg = {
3342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3343 .rpc_argp = &setclientid,
3344 .rpc_resp = clp,
286d7d6a 3345 .rpc_cred = cred,
1da177e4 3346 };
bc4785cd 3347 __be32 *p;
1da177e4
LT		 3348 int loop = 0;
3349 int status;
3350
bc4785cd 3351 p = (__be32*)sc_verifier.data;
1da177e4
LT		 3352 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3353 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3354
3355 for(;;) {
3356 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
69dd716c 3357 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
d4d3c507
CL		 3358 clp->cl_ipaddr,
3359 rpc_peeraddr2str(clp->cl_rpcclient,
3360 RPC_DISPLAY_ADDR),
69dd716c
TM		 3361 rpc_peeraddr2str(clp->cl_rpcclient,
3362 RPC_DISPLAY_PROTO),
78ea323b 3363 clp->cl_rpcclient->cl_auth->au_ops->au_name,
1da177e4
LT		 3364 clp->cl_id_uniquifier);
3365 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 3366 sizeof(setclientid.sc_netid),
3367 rpc_peeraddr2str(clp->cl_rpcclient,
3368 RPC_DISPLAY_NETID));
1da177e4 3369 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 3370 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 3371 clp->cl_ipaddr, port >> 8, port & 255);
3372
3373 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3374 if (status != -NFS4ERR_CLID_INUSE)
3375 break;
3376 if (signalled())
3377 break;
3378 if (loop++ & 1)
3379 ssleep(clp->cl_lease_time + 1);
3380 else
3381 if (++clp->cl_id_uniquifier == 0)
3382 break;
3383 }
3384 return status;
3385}
3386
adfa6f98 3387static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3388{
3389 struct nfs_fsinfo fsinfo;
3390 struct rpc_message msg = {
3391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3392 .rpc_argp = clp,
3393 .rpc_resp = &fsinfo,
286d7d6a 3394 .rpc_cred = cred,
1da177e4
LT		 3395 };
3396 unsigned long now;
3397 int status;
3398
3399 now = jiffies;
3400 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3401 if (status == 0) {
3402 spin_lock(&clp->cl_lock);
3403 clp->cl_lease_time = fsinfo.lease_time * HZ;
3404 clp->cl_last_renewal = now;
3405 spin_unlock(&clp->cl_lock);
3406 }
3407 return status;
3408}
3409
adfa6f98 3410int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
51581f3b 3411{
77e03677 3412 long timeout = 0;
51581f3b
TM		 3413 int err;
3414 do {
3415 err = _nfs4_proc_setclientid_confirm(clp, cred);
3416 switch (err) {
3417 case 0:
3418 return err;
3419 case -NFS4ERR_RESOURCE:
3420 /* The IBM lawyers misread another document! */
3421 case -NFS4ERR_DELAY:
3422 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3423 }
3424 } while (err == 0);
3425 return err;
3426}
3427
fe650407
TM		 3428struct nfs4_delegreturndata {
3429 struct nfs4_delegreturnargs args;
fa178f29 3430 struct nfs4_delegreturnres res;
fe650407
TM		 3431 struct nfs_fh fh;
3432 nfs4_stateid stateid;
26e976a8 3433 unsigned long timestamp;
fa178f29 3434 struct nfs_fattr fattr;
fe650407
TM		 3435 int rpc_status;
3436};
3437
fe650407
TM		 3438static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3439{
3440 struct nfs4_delegreturndata *data = calldata;
938e1010
AA		 3441
3442 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3443 task->tk_status);
3444
fe650407 3445 data->rpc_status = task->tk_status;
26e976a8 3446 if (data->rpc_status == 0)
fa178f29 3447 renew_lease(data->res.server, data->timestamp);
fe650407
TM		 3448}
3449
3450static void nfs4_delegreturn_release(void *calldata)
3451{
fe650407
TM		 3452 kfree(calldata);
3453}
3454
938e1010
AA		 3455#if defined(CONFIG_NFS_V4_1)
3456static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3457{
3458 struct nfs4_delegreturndata *d_data;
3459
3460 d_data = (struct nfs4_delegreturndata *)data;
3461
3462 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3463 &d_data->args.seq_args,
3464 &d_data->res.seq_res, 1, task))
3465 return;
3466 rpc_call_start(task);
3467}
3468#endif /* CONFIG_NFS_V4_1 */
3469
c8d149f3 3470static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 3471#if defined(CONFIG_NFS_V4_1)
3472 .rpc_call_prepare = nfs4_delegreturn_prepare,
3473#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 3474 .rpc_call_done = nfs4_delegreturn_done,
3475 .rpc_release = nfs4_delegreturn_release,
3476};
3477
e6f81075 3478static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 3479{
3480 struct nfs4_delegreturndata *data;
fa178f29 3481 struct nfs_server *server = NFS_SERVER(inode);
fe650407 3482 struct rpc_task *task;
5138fde0
TM		 3483 struct rpc_message msg = {
3484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3485 .rpc_cred = cred,
3486 };
c970aa85
TM		 3487 struct rpc_task_setup task_setup_data = {
3488 .rpc_client = server->client,
5138fde0 3489 .rpc_message = &msg,
c970aa85
TM		 3490 .callback_ops = &nfs4_delegreturn_ops,
3491 .flags = RPC_TASK_ASYNC,
3492 };
e6f81075 3493 int status = 0;
fe650407 3494
938e1010 3495 data = kzalloc(sizeof(*data), GFP_KERNEL);
fe650407
TM		 3496 if (data == NULL)
3497 return -ENOMEM;
3498 data->args.fhandle = &data->fh;
3499 data->args.stateid = &data->stateid;
fa178f29 3500 data->args.bitmask = server->attr_bitmask;
fe650407
TM		 3501 nfs_copy_fh(&data->fh, NFS_FH(inode));
3502 memcpy(&data->stateid, stateid, sizeof(data->stateid));
fa178f29
TM		 3503 data->res.fattr = &data->fattr;
3504 data->res.server = server;
5f7dbd5c 3505 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5138fde0 3506 nfs_fattr_init(data->res.fattr);
26e976a8 3507 data->timestamp = jiffies;
fe650407
TM		 3508 data->rpc_status = 0;
3509
c970aa85 3510 task_setup_data.callback_data = data;
5138fde0
TM		 3511 msg.rpc_argp = &data->args,
3512 msg.rpc_resp = &data->res,
c970aa85 3513 task = rpc_run_task(&task_setup_data);
7a1218a2 3514 if (IS_ERR(task))
fe650407 3515 return PTR_ERR(task);
e6f81075
TM		 3516 if (!issync)
3517 goto out;
fe650407 3518 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 3519 if (status != 0)
3520 goto out;
3521 status = data->rpc_status;
3522 if (status != 0)
3523 goto out;
3524 nfs_refresh_inode(inode, &data->fattr);
3525out:
e6b3c4db 3526 rpc_put_task(task);
fe650407 3527 return status;
1da177e4
LT		 3528}
3529
e6f81075 3530int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 3531{
3532 struct nfs_server *server = NFS_SERVER(inode);
3533 struct nfs4_exception exception = { };
3534 int err;
3535 do {
e6f81075 3536 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 3537 switch (err) {
3538 case -NFS4ERR_STALE_STATEID:
3539 case -NFS4ERR_EXPIRED:
1da177e4
LT		 3540 case 0:
3541 return 0;
3542 }
3543 err = nfs4_handle_exception(server, err, &exception);
3544 } while (exception.retry);
3545 return err;
3546}
3547
3548#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3549#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3550
3551/*
3552 * sleep, with exponential backoff, and retry the LOCK operation.
3553 */
3554static unsigned long
3555nfs4_set_lock_task_retry(unsigned long timeout)
3556{
150030b7 3557 schedule_timeout_killable(timeout);
1da177e4
LT		 3558 timeout <<= 1;
3559 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3560 return NFS4_LOCK_MAXTIMEOUT;
3561 return timeout;
3562}
3563
1da177e4
LT		 3564static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3565{
3566 struct inode *inode = state->inode;
3567 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 3568 struct nfs_client *clp = server->nfs_client;
911d1aaf 3569 struct nfs_lockt_args arg = {
1da177e4 3570 .fh = NFS_FH(inode),
911d1aaf 3571 .fl = request,
1da177e4 3572 };
911d1aaf
TM		 3573 struct nfs_lockt_res res = {
3574 .denied = request,
1da177e4
LT		 3575 };
3576 struct rpc_message msg = {
3577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3578 .rpc_argp = &arg,
3579 .rpc_resp = &res,
3580 .rpc_cred = state->owner->so_cred,
3581 };
1da177e4
LT		 3582 struct nfs4_lock_state *lsp;
3583 int status;
3584
911d1aaf 3585 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 3586 status = nfs4_set_lock_state(state, request);
3587 if (status != 0)
3588 goto out;
3589 lsp = request->fl_u.nfs4_fl.owner;
9f958ab8 3590 arg.lock_owner.id = lsp->ls_id.id;
cccef3b9 3591 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
911d1aaf
TM		 3592 switch (status) {
3593 case 0:
3594 request->fl_type = F_UNLCK;
3595 break;
3596 case -NFS4ERR_DENIED:
3597 status = 0;
1da177e4 3598 }
70cc6487 3599 request->fl_ops->fl_release_private(request);
8d0a8a9d 3600out:
1da177e4
LT		 3601 return status;
3602}
3603
3604static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3605{
3606 struct nfs4_exception exception = { };
3607 int err;
3608
3609 do {
3610 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3611 _nfs4_proc_getlk(state, cmd, request),
3612 &exception);
3613 } while (exception.retry);
3614 return err;
3615}
3616
3617static int do_vfs_lock(struct file *file, struct file_lock *fl)
3618{
3619 int res = 0;
3620 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3621 case FL_POSIX:
3622 res = posix_lock_file_wait(file, fl);
3623 break;
3624 case FL_FLOCK:
3625 res = flock_lock_file_wait(file, fl);
3626 break;
3627 default:
3628 BUG();
3629 }
1da177e4
LT		 3630 return res;
3631}
3632
faf5f49c 3633struct nfs4_unlockdata {
911d1aaf
TM		 3634 struct nfs_locku_args arg;
3635 struct nfs_locku_res res;
faf5f49c
TM		 3636 struct nfs4_lock_state *lsp;
3637 struct nfs_open_context *ctx;
911d1aaf
TM		 3638 struct file_lock fl;
3639 const struct nfs_server *server;
26e976a8 3640 unsigned long timestamp;
faf5f49c
TM		 3641};
3642
911d1aaf
TM		 3643static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3644 struct nfs_open_context *ctx,
3645 struct nfs4_lock_state *lsp,
3646 struct nfs_seqid *seqid)
3647{
3648 struct nfs4_unlockdata *p;
3649 struct inode *inode = lsp->ls_state->inode;
3650
a893693c 3651 p = kzalloc(sizeof(*p), GFP_KERNEL);
911d1aaf
TM		 3652 if (p == NULL)
3653 return NULL;
3654 p->arg.fh = NFS_FH(inode);
3655 p->arg.fl = &p->fl;
3656 p->arg.seqid = seqid;
c1d51931 3657 p->res.seqid = seqid;
5f7dbd5c 3658 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
911d1aaf
TM		 3659 p->arg.stateid = &lsp->ls_stateid;
3660 p->lsp = lsp;
3661 atomic_inc(&lsp->ls_count);
3662 /* Ensure we don't close file until we're done freeing locks! */
3663 p->ctx = get_nfs_open_context(ctx);
3664 memcpy(&p->fl, fl, sizeof(p->fl));
3665 p->server = NFS_SERVER(inode);
3666 return p;
3667}
3668
06f814a3 3669static void nfs4_locku_release_calldata(void *data)
faf5f49c 3670{
963d8fe5 3671 struct nfs4_unlockdata *calldata = data;
911d1aaf 3672 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 3673 nfs4_put_lock_state(calldata->lsp);
3674 put_nfs_open_context(calldata->ctx);
3675 kfree(calldata);
faf5f49c
TM		 3676}
3677
963d8fe5 3678static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 3679{
963d8fe5 3680 struct nfs4_unlockdata *calldata = data;
faf5f49c 3681
a893693c
AA		 3682 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3683 task->tk_status);
06f814a3
TM		 3684 if (RPC_ASSASSINATED(task))
3685 return;
faf5f49c
TM		 3686 switch (task->tk_status) {
3687 case 0:
3688 memcpy(calldata->lsp->ls_stateid.data,
911d1aaf 3689 calldata->res.stateid.data,
faf5f49c 3690 sizeof(calldata->lsp->ls_stateid.data));
26e976a8 3691 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 3692 break;
9e33bed5
TM		 3693 case -NFS4ERR_BAD_STATEID:
3694 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 3695 case -NFS4ERR_STALE_STATEID:
3696 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 3697 break;
3698 default:
9e33bed5 3699 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
eedc020e
AA		 3700 nfs4_restart_rpc(task,
3701 calldata->server->nfs_client);
faf5f49c 3702 }
a893693c
AA		 3703 nfs4_sequence_free_slot(calldata->server->nfs_client,
3704 &calldata->res.seq_res);
faf5f49c
TM		 3705}
3706
4ce70ada 3707static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 3708{
4ce70ada 3709 struct nfs4_unlockdata *calldata = data;
faf5f49c 3710
911d1aaf 3711 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c
TM		 3712 return;
3713 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
963d8fe5
TM		 3714 /* Note: exit _without_ running nfs4_locku_done */
3715 task->tk_action = NULL;
faf5f49c
TM		 3716 return;
3717 }
26e976a8 3718 calldata->timestamp = jiffies;
a893693c
AA		 3719 if (nfs4_setup_sequence(calldata->server->nfs_client,
3720 &calldata->arg.seq_args,
3721 &calldata->res.seq_res, 1, task))
3722 return;
5138fde0 3723 rpc_call_start(task);
faf5f49c
TM		 3724}
3725
963d8fe5 3726static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 3727 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 3728 .rpc_call_done = nfs4_locku_done,
06f814a3 3729 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 3730};
3731
a5d16a4d
TM		 3732static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3733 struct nfs_open_context *ctx,
3734 struct nfs4_lock_state *lsp,
3735 struct nfs_seqid *seqid)
3736{
3737 struct nfs4_unlockdata *data;
5138fde0
TM		 3738 struct rpc_message msg = {
3739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3740 .rpc_cred = ctx->cred,
3741 };
c970aa85
TM		 3742 struct rpc_task_setup task_setup_data = {
3743 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 3744 .rpc_message = &msg,
c970aa85 3745 .callback_ops = &nfs4_locku_ops,
101070ca 3746 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3747 .flags = RPC_TASK_ASYNC,
3748 };
a5d16a4d 3749
137d6aca
FF		 3750 /* Ensure this is an unlock - when canceling a lock, the
3751 * canceled lock is passed in, and it won't be an unlock.
3752 */
3753 fl->fl_type = F_UNLCK;
3754
a5d16a4d
TM		 3755 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3756 if (data == NULL) {
3757 nfs_free_seqid(seqid);
3758 return ERR_PTR(-ENOMEM);
3759 }
3760
5138fde0
TM		 3761 msg.rpc_argp = &data->arg,
3762 msg.rpc_resp = &data->res,
c970aa85
TM		 3763 task_setup_data.callback_data = data;
3764 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 3765}
3766
faf5f49c
TM		 3767static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3768{
19e03c57 3769 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 3770 struct nfs_seqid *seqid;
1da177e4 3771 struct nfs4_lock_state *lsp;
06f814a3
TM		 3772 struct rpc_task *task;
3773 int status = 0;
536ff0f8 3774 unsigned char fl_flags = request->fl_flags;
faf5f49c 3775
8d0a8a9d 3776 status = nfs4_set_lock_state(state, request);
9b073574
TM		 3777 /* Unlock _before_ we do the RPC call */
3778 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 3779 down_read(&nfsi->rwsem);
3780 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3781 up_read(&nfsi->rwsem);
9b073574 3782 goto out;
19e03c57
TM		 3783 }
3784 up_read(&nfsi->rwsem);
8d0a8a9d 3785 if (status != 0)
9b073574
TM		 3786 goto out;
3787 /* Is this a delegated lock? */
3788 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3789 goto out;
8d0a8a9d 3790 lsp = request->fl_u.nfs4_fl.owner;
911d1aaf 3791 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
9b073574 3792 status = -ENOMEM;
911d1aaf 3793 if (seqid == NULL)
9b073574 3794 goto out;
cd3758e3 3795 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 3796 status = PTR_ERR(task);
3797 if (IS_ERR(task))
9b073574 3798 goto out;
a5d16a4d 3799 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 3800 rpc_put_task(task);
9b073574 3801out:
536ff0f8 3802 request->fl_flags = fl_flags;
1da177e4
LT		 3803 return status;
3804}
3805
a5d16a4d
TM		 3806struct nfs4_lockdata {
3807 struct nfs_lock_args arg;
3808 struct nfs_lock_res res;
3809 struct nfs4_lock_state *lsp;
3810 struct nfs_open_context *ctx;
3811 struct file_lock fl;
26e976a8 3812 unsigned long timestamp;
a5d16a4d
TM		 3813 int rpc_status;
3814 int cancelled;
66179efe 3815 struct nfs_server *server;
a5d16a4d
TM		 3816};
3817
3818static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3819 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
1da177e4 3820{
a5d16a4d
TM		 3821 struct nfs4_lockdata *p;
3822 struct inode *inode = lsp->ls_state->inode;
1da177e4 3823 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d
TM		 3824
3825 p = kzalloc(sizeof(*p), GFP_KERNEL);
3826 if (p == NULL)
3827 return NULL;
3828
3829 p->arg.fh = NFS_FH(inode);
3830 p->arg.fl = &p->fl;
2f74c0a0
TM		 3831 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3832 if (p->arg.open_seqid == NULL)
3833 goto out_free;
a5d16a4d
TM		 3834 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3835 if (p->arg.lock_seqid == NULL)
2f74c0a0 3836 goto out_free_seqid;
a5d16a4d 3837 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 3838 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
9f958ab8 3839 p->arg.lock_owner.id = lsp->ls_id.id;
c1d51931 3840 p->res.lock_seqid = p->arg.lock_seqid;
5f7dbd5c 3841 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
a5d16a4d 3842 p->lsp = lsp;
66179efe 3843 p->server = server;
a5d16a4d
TM		 3844 atomic_inc(&lsp->ls_count);
3845 p->ctx = get_nfs_open_context(ctx);
3846 memcpy(&p->fl, fl, sizeof(p->fl));
3847 return p;
2f74c0a0
TM		 3848out_free_seqid:
3849 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 3850out_free:
3851 kfree(p);
3852 return NULL;
3853}
3854
3855static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3856{
3857 struct nfs4_lockdata *data = calldata;
3858 struct nfs4_state *state = data->lsp->ls_state;
06735b34 3859
3110ff80 3860 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 3861 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3862 return;
a5d16a4d
TM		 3863 /* Do we need to do an open_to_lock_owner? */
3864 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970
TM		 3865 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3866 return;
a5d16a4d
TM		 3867 data->arg.open_stateid = &state->stateid;
3868 data->arg.new_lock_owner = 1;
c1d51931 3869 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 3870 } else
3871 data->arg.new_lock_owner = 0;
26e976a8 3872 data->timestamp = jiffies;
66179efe
AA		 3873 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3874 &data->res.seq_res, 1, task))
3875 return;
5138fde0 3876 rpc_call_start(task);
3110ff80 3877 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
a5d16a4d
TM		 3878}
3879
3880static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3881{
3882 struct nfs4_lockdata *data = calldata;
3883
3110ff80 3884 dprintk("%s: begin!\n", __func__);
a5d16a4d 3885
66179efe
AA		 3886 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3887 task->tk_status);
3888
a5d16a4d
TM		 3889 data->rpc_status = task->tk_status;
3890 if (RPC_ASSASSINATED(task))
3891 goto out;
3892 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 3893 if (data->rpc_status == 0)
3894 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3895 else
3896 goto out;
3897 }
3898 if (data->rpc_status == 0) {
3899 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3900 sizeof(data->lsp->ls_stateid.data));
3901 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
88be9f99 3902 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
a5d16a4d 3903 }
a5d16a4d 3904out:
3110ff80 3905 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 3906}
3907
3908static void nfs4_lock_release(void *calldata)
3909{
3910 struct nfs4_lockdata *data = calldata;
3911
3110ff80 3912 dprintk("%s: begin!\n", __func__);
2f74c0a0 3913 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 3914 if (data->cancelled != 0) {
3915 struct rpc_task *task;
3916 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3917 data->arg.lock_seqid);
3918 if (!IS_ERR(task))
e6b3c4db 3919 rpc_put_task(task);
3110ff80 3920 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 3921 } else
3922 nfs_free_seqid(data->arg.lock_seqid);
3923 nfs4_put_lock_state(data->lsp);
3924 put_nfs_open_context(data->ctx);
3925 kfree(data);
3110ff80 3926 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 3927}
3928
3929static const struct rpc_call_ops nfs4_lock_ops = {
3930 .rpc_call_prepare = nfs4_lock_prepare,
3931 .rpc_call_done = nfs4_lock_done,
3932 .rpc_release = nfs4_lock_release,
3933};
3934
3935static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3936{
3937 struct nfs4_lockdata *data;
3938 struct rpc_task *task;
5138fde0
TM		 3939 struct rpc_message msg = {
3940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3941 .rpc_cred = state->owner->so_cred,
3942 };
c970aa85
TM		 3943 struct rpc_task_setup task_setup_data = {
3944 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 3945 .rpc_message = &msg,
c970aa85 3946 .callback_ops = &nfs4_lock_ops,
101070ca 3947 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3948 .flags = RPC_TASK_ASYNC,
3949 };
a5d16a4d
TM		 3950 int ret;
3951
3110ff80 3952 dprintk("%s: begin!\n", __func__);
cd3758e3 3953 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
a5d16a4d
TM		 3954 fl->fl_u.nfs4_fl.owner);
3955 if (data == NULL)
3956 return -ENOMEM;
3957 if (IS_SETLKW(cmd))
3958 data->arg.block = 1;
3959 if (reclaim != 0)
3960 data->arg.reclaim = 1;
5138fde0
TM		 3961 msg.rpc_argp = &data->arg,
3962 msg.rpc_resp = &data->res,
c970aa85
TM		 3963 task_setup_data.callback_data = data;
3964 task = rpc_run_task(&task_setup_data);
7a1218a2 3965 if (IS_ERR(task))
a5d16a4d 3966 return PTR_ERR(task);
a5d16a4d
TM		 3967 ret = nfs4_wait_for_completion_rpc_task(task);
3968 if (ret == 0) {
3969 ret = data->rpc_status;
3970 if (ret == -NFS4ERR_DENIED)
3971 ret = -EAGAIN;
3972 } else
3973 data->cancelled = 1;
e6b3c4db 3974 rpc_put_task(task);
3110ff80 3975 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 3976 return ret;
1da177e4
LT		 3977}
3978
3979static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3980{
202b50dc
TM		 3981 struct nfs_server *server = NFS_SERVER(state->inode);
3982 struct nfs4_exception exception = { };
3983 int err;
3984
3985 do {
42a2d13e
TM		 3986 /* Cache the lock if possible... */
3987 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3988 return 0;
202b50dc
TM		 3989 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3990 if (err != -NFS4ERR_DELAY)
3991 break;
3992 nfs4_handle_exception(server, err, &exception);
3993 } while (exception.retry);
3994 return err;
1da177e4
LT		 3995}
3996
3997static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3998{
202b50dc
TM		 3999 struct nfs_server *server = NFS_SERVER(state->inode);
4000 struct nfs4_exception exception = { };
4001 int err;
4002
6bfc93ef
TM		 4003 err = nfs4_set_lock_state(state, request);
4004 if (err != 0)
4005 return err;
202b50dc 4006 do {
42a2d13e
TM		 4007 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4008 return 0;
202b50dc
TM		 4009 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4010 if (err != -NFS4ERR_DELAY)
4011 break;
4012 nfs4_handle_exception(server, err, &exception);
4013 } while (exception.retry);
4014 return err;
1da177e4
LT		 4015}
4016
4017static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4018{
19e03c57 4019 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4020 unsigned char fl_flags = request->fl_flags;
1da177e4
LT		 4021 int status;
4022
6bfc93ef 4023 /* Is this a delegated open? */
6bfc93ef
TM		 4024 status = nfs4_set_lock_state(state, request);
4025 if (status != 0)
4026 goto out;
01c3b861
TM		 4027 request->fl_flags |= FL_ACCESS;
4028 status = do_vfs_lock(request->fl_file, request);
4029 if (status < 0)
4030 goto out;
19e03c57 4031 down_read(&nfsi->rwsem);
01c3b861 4032 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4033 /* Yes: cache locks! */
01c3b861 4034 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4035 request->fl_flags = fl_flags & ~FL_SLEEP;
4036 status = do_vfs_lock(request->fl_file, request);
4037 goto out_unlock;
01c3b861 4038 }
6bfc93ef
TM		 4039 status = _nfs4_do_setlk(state, cmd, request, 0);
4040 if (status != 0)
01c3b861 4041 goto out_unlock;
6bfc93ef 4042 /* Note: we always want to sleep here! */
01c3b861 4043 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4044 if (do_vfs_lock(request->fl_file, request) < 0)
3110ff80 4045 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
01c3b861 4046out_unlock:
19e03c57 4047 up_read(&nfsi->rwsem);
01c3b861
TM		 4048out:
4049 request->fl_flags = fl_flags;
1da177e4
LT		 4050 return status;
4051}
4052
4053static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4054{
4055 struct nfs4_exception exception = { };
4056 int err;
4057
4058 do {
4059 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4060 _nfs4_proc_setlk(state, cmd, request),
4061 &exception);
4062 } while (exception.retry);
4063 return err;
4064}
4065
4066static int
4067nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4068{
4069 struct nfs_open_context *ctx;
4070 struct nfs4_state *state;
4071 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4072 int status;
4073
4074 /* verify open state */
cd3758e3 4075 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4076 state = ctx->state;
4077
4078 if (request->fl_start < 0 || request->fl_end < 0)
4079 return -EINVAL;
4080
4081 if (IS_GETLK(cmd))
4082 return nfs4_proc_getlk(state, F_GETLK, request);
4083
4084 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4085 return -EINVAL;
4086
4087 if (request->fl_type == F_UNLCK)
4088 return nfs4_proc_unlck(state, cmd, request);
4089
4090 do {
4091 status = nfs4_proc_setlk(state, cmd, request);
4092 if ((status != -EAGAIN) || IS_SETLK(cmd))
4093 break;
4094 timeout = nfs4_set_lock_task_retry(timeout);
4095 status = -ERESTARTSYS;
4096 if (signalled())
4097 break;
4098 } while(status < 0);
1da177e4
LT		 4099 return status;
4100}
4101
888e694c
TM		 4102int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4103{
4104 struct nfs_server *server = NFS_SERVER(state->inode);
4105 struct nfs4_exception exception = { };
4106 int err;
4107
4108 err = nfs4_set_lock_state(state, fl);
4109 if (err != 0)
4110 goto out;
4111 do {
4112 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4113 if (err != -NFS4ERR_DELAY)
4114 break;
4115 err = nfs4_handle_exception(server, err, &exception);
4116 } while (exception.retry);
4117out:
4118 return err;
4119}
6b3b5496 4120
aa1870af
BF		 4121#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4122
6b3b5496
BF		 4123int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4124 size_t buflen, int flags)
4125{
4b580ee3
BF		 4126 struct inode *inode = dentry->d_inode;
4127
4128 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4129 return -EOPNOTSUPP;
4130
4b580ee3 4131 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 4132}
4133
4134/* The getxattr man page suggests returning -ENODATA for unknown attributes,
4135 * and that's what we'll do for e.g. user attributes that haven't been set.
4136 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4137 * attributes in kernel-managed attribute namespaces. */
4138ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4139 size_t buflen)
4140{
aa1870af
BF		 4141 struct inode *inode = dentry->d_inode;
4142
4143 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4144 return -EOPNOTSUPP;
4145
4146 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 4147}
4148
4149ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4150{
aa1870af 4151 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
6b3b5496 4152
096455a2
BF		 4153 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4154 return 0;
6b3b5496
BF		 4155 if (buf && buflen < len)
4156 return -ERANGE;
4157 if (buf)
aa1870af
BF		 4158 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4159 return len;
6b3b5496
BF		 4160}
4161
69aaaae1
TM		 4162static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4163{
4164 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4165 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4166 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4167 return;
4168
4169 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4170 NFS_ATTR_FATTR_NLINK;
4171 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4172 fattr->nlink = 2;
4173}
4174
56659e99 4175int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
7aaa0b3b 4176 struct nfs4_fs_locations *fs_locations, struct page *page)
683b57b4
TM		 4177{
4178 struct nfs_server *server = NFS_SERVER(dir);
4179 u32 bitmask[2] = {
361e624f
MN		 4180 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4181 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
683b57b4
TM		 4182 };
4183 struct nfs4_fs_locations_arg args = {
4184 .dir_fh = NFS_FH(dir),
c228fd3a 4185 .name = name,
683b57b4
TM		 4186 .page = page,
4187 .bitmask = bitmask,
4188 };
22958463
BH		 4189 struct nfs4_fs_locations_res res = {
4190 .fs_locations = fs_locations,
4191 };
683b57b4
TM		 4192 struct rpc_message msg = {
4193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4194 .rpc_argp = &args,
22958463 4195 .rpc_resp = &res,
683b57b4
TM		 4196 };
4197 int status;
4198
3110ff80 4199 dprintk("%s: start\n", __func__);
c228fd3a 4200 nfs_fattr_init(&fs_locations->fattr);
683b57b4 4201 fs_locations->server = server;
830b8e33 4202 fs_locations->nlocations = 0;
cccef3b9 4203 status = nfs4_call_sync(server, &msg, &args, &res, 0);
69aaaae1 4204 nfs_fixup_referral_attributes(&fs_locations->fattr);
3110ff80 4205 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 4206 return status;
4207}
4208
557134a3 4209#ifdef CONFIG_NFS_V4_1
99fe60d0
BH		 4210/*
4211 * nfs4_proc_exchange_id()
4212 *
4213 * Since the clientid has expired, all compounds using sessions
4214 * associated with the stale clientid will be returning
4215 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4216 * be in some phase of session reset.
4217 */
4218static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4219{
4220 nfs4_verifier verifier;
4221 struct nfs41_exchange_id_args args = {
4222 .client = clp,
4223 .flags = clp->cl_exchange_flags,
4224 };
4225 struct nfs41_exchange_id_res res = {
4226 .client = clp,
4227 };
4228 int status;
4229 struct rpc_message msg = {
4230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4231 .rpc_argp = &args,
4232 .rpc_resp = &res,
4233 .rpc_cred = cred,
4234 };
4235 __be32 *p;
4236
4237 dprintk("--> %s\n", __func__);
4238 BUG_ON(clp == NULL);
a7b72103 4239
99fe60d0
BH		 4240 p = (u32 *)verifier.data;
4241 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4242 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4243 args.verifier = &verifier;
4244
4245 while (1) {
4246 args.id_len = scnprintf(args.id, sizeof(args.id),
4247 "%s/%s %u",
4248 clp->cl_ipaddr,
4249 rpc_peeraddr2str(clp->cl_rpcclient,
4250 RPC_DISPLAY_ADDR),
4251 clp->cl_id_uniquifier);
4252
4253 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4254
4255 if (status != NFS4ERR_CLID_INUSE)
4256 break;
4257
4258 if (signalled())
4259 break;
4260
4261 if (++clp->cl_id_uniquifier == 0)
4262 break;
4263 }
4264
4265 dprintk("<-- %s status= %d\n", __func__, status);
4266 return status;
4267}
4268
2050f0cc
AA		 4269struct nfs4_get_lease_time_data {
4270 struct nfs4_get_lease_time_args *args;
4271 struct nfs4_get_lease_time_res *res;
4272 struct nfs_client *clp;
4273};
4274
4275static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4276 void *calldata)
4277{
4278 int ret;
4279 struct nfs4_get_lease_time_data *data =
4280 (struct nfs4_get_lease_time_data *)calldata;
4281
4282 dprintk("--> %s\n", __func__);
4283 /* just setup sequence, do not trigger session recovery
4284 since we're invoked within one */
4285 ret = nfs41_setup_sequence(data->clp->cl_session,
4286 &data->args->la_seq_args,
4287 &data->res->lr_seq_res, 0, task);
4288
4289 BUG_ON(ret == -EAGAIN);
4290 rpc_call_start(task);
4291 dprintk("<-- %s\n", __func__);
4292}
4293
4294/*
4295 * Called from nfs4_state_manager thread for session setup, so don't recover
4296 * from sequence operation or clientid errors.
4297 */
4298static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4299{
4300 struct nfs4_get_lease_time_data *data =
4301 (struct nfs4_get_lease_time_data *)calldata;
4302
4303 dprintk("--> %s\n", __func__);
4304 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4305 switch (task->tk_status) {
4306 case -NFS4ERR_DELAY:
4307 case -NFS4ERR_GRACE:
4308 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4309 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4310 task->tk_status = 0;
eedc020e 4311 nfs4_restart_rpc(task, data->clp);
2050f0cc
AA		 4312 return;
4313 }
4314 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4315 dprintk("<-- %s\n", __func__);
4316}
4317
4318struct rpc_call_ops nfs4_get_lease_time_ops = {
4319 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4320 .rpc_call_done = nfs4_get_lease_time_done,
4321};
4322
4323int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4324{
4325 struct rpc_task *task;
4326 struct nfs4_get_lease_time_args args;
4327 struct nfs4_get_lease_time_res res = {
4328 .lr_fsinfo = fsinfo,
4329 };
4330 struct nfs4_get_lease_time_data data = {
4331 .args = &args,
4332 .res = &res,
4333 .clp = clp,
4334 };
4335 struct rpc_message msg = {
4336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4337 .rpc_argp = &args,
4338 .rpc_resp = &res,
4339 };
4340 struct rpc_task_setup task_setup = {
4341 .rpc_client = clp->cl_rpcclient,
4342 .rpc_message = &msg,
4343 .callback_ops = &nfs4_get_lease_time_ops,
4344 .callback_data = &data
4345 };
4346 int status;
4347
4348 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4349 dprintk("--> %s\n", __func__);
4350 task = rpc_run_task(&task_setup);
4351
4352 if (IS_ERR(task))
4353 status = PTR_ERR(task);
4354 else {
4355 status = task->tk_status;
4356 rpc_put_task(task);
4357 }
4358 dprintk("<-- %s return %d\n", __func__, status);
4359
4360 return status;
4361}
4362
ac72b7b3
AA		 4363/* Reset a slot table */
4364static int nfs4_reset_slot_table(struct nfs4_session *session)
4365{
4366 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4367 int i, max_slots = session->fc_attrs.max_reqs;
4368 int old_max_slots = session->fc_slot_table.max_slots;
4369 int ret = 0;
4370
4371 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__,
4372 session->fc_attrs.max_reqs, tbl);
4373
4374 /* Until we have dynamic slot table adjustment, insist
4375 * upon the same slot table size */
4376 if (max_slots != old_max_slots) {
4377 dprintk("%s reset slot table does't match old\n",
4378 __func__);
4379 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4380 goto out;
4381 }
4382 spin_lock(&tbl->slot_tbl_lock);
4383 for (i = 0; i < max_slots; ++i)
4384 tbl->slots[i].seq_nr = 1;
4385 tbl->highest_used_slotid = -1;
4386 spin_unlock(&tbl->slot_tbl_lock);
4387 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4388 tbl, tbl->slots, tbl->max_slots);
4389out:
4390 dprintk("<-- %s: return %d\n", __func__, ret);
4391 return ret;
4392}
4393
fc931582
AA		 4394/*
4395 * Initialize slot table
4396 */
4397static int nfs4_init_slot_table(struct nfs4_session *session)
4398{
4399 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4400 int i, max_slots = session->fc_attrs.max_reqs;
4401 struct nfs4_slot *slot;
4402 int ret = -ENOMEM;
4403
4404 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4405
4406 dprintk("--> %s: max_reqs=%u\n", __func__,
4407 session->fc_attrs.max_reqs);
4408
4409 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4410 if (!slot)
4411 goto out;
4412 for (i = 0; i < max_slots; ++i)
4413 slot[i].seq_nr = 1;
4414 ret = 0;
4415
4416 spin_lock(&tbl->slot_tbl_lock);
4417 if (tbl->slots != NULL) {
4418 spin_unlock(&tbl->slot_tbl_lock);
4419 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4420 __func__, tbl, tbl->slots);
4421 WARN_ON(1);
4422 goto out_free;
4423 }
4424 tbl->max_slots = max_slots;
4425 tbl->slots = slot;
4426 tbl->highest_used_slotid = -1; /* no slot is currently used */
4427 spin_unlock(&tbl->slot_tbl_lock);
4428 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4429 tbl, tbl->slots, tbl->max_slots);
4430out:
4431 dprintk("<-- %s: return %d\n", __func__, ret);
4432 return ret;
4433out_free:
4434 kfree(slot);
4435 goto out;
4436}
4437
557134a3
AA		 4438/* Destroy the slot table */
4439static void nfs4_destroy_slot_table(struct nfs4_session *session)
4440{
4441 if (session->fc_slot_table.slots == NULL)
4442 return;
4443 kfree(session->fc_slot_table.slots);
4444 session->fc_slot_table.slots = NULL;
4445 return;
4446}
4447
4448struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4449{
4450 struct nfs4_session *session;
4451 struct nfs4_slot_table *tbl;
4452
4453 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4454 if (!session)
4455 return NULL;
76db6d95
AA		 4456
4457 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4458 /*
4459 * The create session reply races with the server back
4460 * channel probe. Mark the client NFS_CS_SESSION_INITING
4461 * so that the client back channel can find the
4462 * nfs_client struct
4463 */
4464 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4465
557134a3
AA		 4466 tbl = &session->fc_slot_table;
4467 spin_lock_init(&tbl->slot_tbl_lock);
4468 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4469 session->clp = clp;
4470 return session;
4471}
4472
4473void nfs4_destroy_session(struct nfs4_session *session)
4474{
4475 nfs4_destroy_slot_table(session);
4476 kfree(session);
4477}
4478
fc931582
AA		 4479/*
4480 * Initialize the values to be used by the client in CREATE_SESSION
4481 * If nfs4_init_session set the fore channel request and response sizes,
4482 * use them.
4483 *
4484 * Set the back channel max_resp_sz_cached to zero to force the client to
4485 * always set csa_cachethis to FALSE because the current implementation
4486 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4487 */
4488static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4489{
4490 struct nfs4_session *session = args->client->cl_session;
4491 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4492 mxresp_sz = session->fc_attrs.max_resp_sz;
4493
4494 if (mxrqst_sz == 0)
4495 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4496 if (mxresp_sz == 0)
4497 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4498 /* Fore channel attributes */
4499 args->fc_attrs.headerpadsz = 0;
4500 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4501 args->fc_attrs.max_resp_sz = mxresp_sz;
4502 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4503 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4504 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4505
4506 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4507 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4508 __func__,
4509 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4510 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4511 args->fc_attrs.max_reqs);
4512
4513 /* Back channel attributes */
4514 args->bc_attrs.headerpadsz = 0;
4515 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4516 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4517 args->bc_attrs.max_resp_sz_cached = 0;
4518 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4519 args->bc_attrs.max_reqs = 1;
4520
4521 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4522 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4523 __func__,
4524 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4525 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4526 args->bc_attrs.max_reqs);
4527}
4528
8d35301d
AA		 4529static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4530{
4531 if (rcvd <= sent)
4532 return 0;
4533 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4534 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4535 return -EINVAL;
4536}
4537
4538#define _verify_fore_channel_attr(_name_) \
4539 _verify_channel_attr("fore", #_name_, \
4540 args->fc_attrs._name_, \
4541 session->fc_attrs._name_)
4542
4543#define _verify_back_channel_attr(_name_) \
4544 _verify_channel_attr("back", #_name_, \
4545 args->bc_attrs._name_, \
4546 session->bc_attrs._name_)
4547
4548/*
4549 * The server is not allowed to increase the fore channel header pad size,
4550 * maximum response size, or maximum number of operations.
4551 *
4552 * The back channel attributes are only negotiatied down: We send what the
4553 * (back channel) server insists upon.
4554 */
4555static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4556 struct nfs4_session *session)
4557{
4558 int ret = 0;
4559
4560 ret |= _verify_fore_channel_attr(headerpadsz);
4561 ret |= _verify_fore_channel_attr(max_resp_sz);
4562 ret |= _verify_fore_channel_attr(max_ops);
4563
4564 ret |= _verify_back_channel_attr(headerpadsz);
4565 ret |= _verify_back_channel_attr(max_rqst_sz);
4566 ret |= _verify_back_channel_attr(max_resp_sz);
4567 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4568 ret |= _verify_back_channel_attr(max_ops);
4569 ret |= _verify_back_channel_attr(max_reqs);
4570
4571 return ret;
4572}
4573
fc931582
AA		 4574static int _nfs4_proc_create_session(struct nfs_client *clp)
4575{
4576 struct nfs4_session *session = clp->cl_session;
4577 struct nfs41_create_session_args args = {
4578 .client = clp,
4579 .cb_program = NFS4_CALLBACK,
4580 };
4581 struct nfs41_create_session_res res = {
4582 .client = clp,
4583 };
4584 struct rpc_message msg = {
4585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4586 .rpc_argp = &args,
4587 .rpc_resp = &res,
4588 };
4589 int status;
4590
4591 nfs4_init_channel_attrs(&args);
4592 args.flags = (SESSION4_PERSIST);
4593
4594 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4595
8d35301d
AA		 4596 if (!status)
4597 /* Verify the session's negotiated channel_attrs values */
4598 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 4599 if (!status) {
4600 /* Increment the clientid slot sequence id */
4601 clp->cl_seqid++;
4602 }
4603
4604 return status;
4605}
4606
4607/*
4608 * Issues a CREATE_SESSION operation to the server.
4609 * It is the responsibility of the caller to verify the session is
4610 * expired before calling this routine.
4611 */
ac72b7b3 4612int nfs4_proc_create_session(struct nfs_client *clp, int reset)
fc931582
AA		 4613{
4614 int status;
4615 unsigned *ptr;
4616 struct nfs_fsinfo fsinfo;
4617 struct nfs4_session *session = clp->cl_session;
4618
4619 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4620
4621 status = _nfs4_proc_create_session(clp);
4622 if (status)
4623 goto out;
4624
ac72b7b3
AA		 4625 /* Init or reset the fore channel */
4626 if (reset)
4627 status = nfs4_reset_slot_table(session);
4628 else
4629 status = nfs4_init_slot_table(session);
fc931582
AA		 4630 dprintk("fore channel slot table initialization returned %d\n", status);
4631 if (status)
4632 goto out;
4633
4634 ptr = (unsigned *)&session->sess_id.data[0];
4635 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4636 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4637
ac72b7b3
AA		 4638 if (reset)
4639 /* Lease time is aleady set */
4640 goto out;
4641
fc931582
AA		 4642 /* Get the lease time */
4643 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4644 if (status == 0) {
4645 /* Update lease time and schedule renewal */
4646 spin_lock(&clp->cl_lock);
4647 clp->cl_lease_time = fsinfo.lease_time * HZ;
4648 clp->cl_last_renewal = jiffies;
4649 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4650 spin_unlock(&clp->cl_lock);
4651
4652 nfs4_schedule_state_renewal(clp);
4653 }
4654out:
4655 dprintk("<-- %s\n", __func__);
4656 return status;
4657}
4658
0f3e66c6
AA		 4659/*
4660 * Issue the over-the-wire RPC DESTROY_SESSION.
4661 * The caller must serialize access to this routine.
4662 */
4663int nfs4_proc_destroy_session(struct nfs4_session *session)
4664{
4665 int status = 0;
4666 struct rpc_message msg;
4667
4668 dprintk("--> nfs4_proc_destroy_session\n");
4669
4670 /* session is still being setup */
4671 if (session->clp->cl_cons_state != NFS_CS_READY)
4672 return status;
4673
4674 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4675 msg.rpc_argp = session;
4676 msg.rpc_resp = NULL;
4677 msg.rpc_cred = NULL;
4678 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4679
4680 if (status)
4681 printk(KERN_WARNING
4682 "Got error %d from the server on DESTROY_SESSION. "
4683 "Session has been destroyed regardless...\n", status);
4684
4685 dprintk("<-- nfs4_proc_destroy_session\n");
4686 return status;
4687}
4688
fc01cea9
AA		 4689/*
4690 * Renew the cl_session lease.
4691 */
4692static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4693{
4694 struct nfs4_sequence_args args;
4695 struct nfs4_sequence_res res;
4696
4697 struct rpc_message msg = {
4698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4699 .rpc_argp = &args,
4700 .rpc_resp = &res,
4701 .rpc_cred = cred,
4702 };
4703
4704 args.sa_cache_this = 0;
4705
4706 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4707 &res, 0);
4708}
4709
4710void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4711{
4712 struct nfs_client *clp = (struct nfs_client *)data;
4713
4714 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4715
4716 if (task->tk_status < 0) {
4717 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4718
4719 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4720 == -EAGAIN) {
eedc020e 4721 nfs4_restart_rpc(task, clp);
fc01cea9
AA		 4722 return;
4723 }
4724 }
4725 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4726 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4727
4728 put_rpccred(task->tk_msg.rpc_cred);
4729 kfree(task->tk_msg.rpc_argp);
4730 kfree(task->tk_msg.rpc_resp);
4731
4732 dprintk("<-- %s\n", __func__);
4733}
4734
4735static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4736{
4737 struct nfs_client *clp;
4738 struct nfs4_sequence_args *args;
4739 struct nfs4_sequence_res *res;
4740
4741 clp = (struct nfs_client *)data;
4742 args = task->tk_msg.rpc_argp;
4743 res = task->tk_msg.rpc_resp;
4744
4745 if (nfs4_setup_sequence(clp, args, res, 0, task))
4746 return;
4747 rpc_call_start(task);
4748}
4749
4750static const struct rpc_call_ops nfs41_sequence_ops = {
4751 .rpc_call_done = nfs41_sequence_call_done,
4752 .rpc_call_prepare = nfs41_sequence_prepare,
4753};
4754
4755static int nfs41_proc_async_sequence(struct nfs_client *clp,
4756 struct rpc_cred *cred)
4757{
4758 struct nfs4_sequence_args *args;
4759 struct nfs4_sequence_res *res;
4760 struct rpc_message msg = {
4761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4762 .rpc_cred = cred,
4763 };
4764
4765 args = kzalloc(sizeof(*args), GFP_KERNEL);
4766 if (!args)
4767 return -ENOMEM;
4768 res = kzalloc(sizeof(*res), GFP_KERNEL);
4769 if (!res) {
4770 kfree(args);
4771 return -ENOMEM;
4772 }
4773 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4774 msg.rpc_argp = args;
4775 msg.rpc_resp = res;
4776
4777 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4778 &nfs41_sequence_ops, (void *)clp);
4779}
4780
557134a3
AA		 4781#endif /* CONFIG_NFS_V4_1 */
4782
591d71cb 4783struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 4784 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 4785 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 4786 .recover_open = nfs4_open_reclaim,
4787 .recover_lock = nfs4_lock_reclaim,
591d71cb 4788 .establish_clid = nfs4_init_clientid,
1da177e4
LT		 4789};
4790
591d71cb
AA		 4791#if defined(CONFIG_NFS_V4_1)
4792struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4793 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4794 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4795 .recover_open = nfs4_open_reclaim,
4796 .recover_lock = nfs4_lock_reclaim,
4797 .establish_clid = nfs4_proc_exchange_id,
4798};
4799#endif /* CONFIG_NFS_V4_1 */
4800
4801struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4802 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4803 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4804 .recover_open = nfs4_open_expired,
4805 .recover_lock = nfs4_lock_expired,
4806 .establish_clid = nfs4_init_clientid,
4807};
4808
4809#if defined(CONFIG_NFS_V4_1)
4810struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 4811 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 4812 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
1da177e4
LT		 4813 .recover_open = nfs4_open_expired,
4814 .recover_lock = nfs4_lock_expired,
591d71cb 4815 .establish_clid = nfs4_proc_exchange_id,
1da177e4 4816};
591d71cb 4817#endif /* CONFIG_NFS_V4_1 */
1da177e4 4818
29fba38b
BH		 4819struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4820 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 4821 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 4822 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 4823};
4824
4825#if defined(CONFIG_NFS_V4_1)
4826struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4827 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 4828 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 4829 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 4830};
4831#endif
4832
4833/*
4834 * Per minor version reboot and network partition recovery ops
4835 */
4836
591d71cb
AA		 4837struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4838 &nfs40_reboot_recovery_ops,
4839#if defined(CONFIG_NFS_V4_1)
4840 &nfs41_reboot_recovery_ops,
4841#endif
4842};
4843
4844struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4845 &nfs40_nograce_recovery_ops,
4846#if defined(CONFIG_NFS_V4_1)
4847 &nfs41_nograce_recovery_ops,
4848#endif
4849};
4850
29fba38b
BH		 4851struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4852 &nfs40_state_renewal_ops,
4853#if defined(CONFIG_NFS_V4_1)
4854 &nfs41_state_renewal_ops,
4855#endif
4856};
4857
92e1d5be 4858static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 4859 .permission = nfs_permission,
4860 .getattr = nfs_getattr,
4861 .setattr = nfs_setattr,
4862 .getxattr = nfs4_getxattr,
4863 .setxattr = nfs4_setxattr,
4864 .listxattr = nfs4_listxattr,
4865};
4866
509de811 4867const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 4868 .version = 4, /* protocol version */
4869 .dentry_ops = &nfs4_dentry_operations,
4870 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 4871 .file_inode_ops = &nfs4_file_inode_operations,
1da177e4
LT		 4872 .getroot = nfs4_proc_get_root,
4873 .getattr = nfs4_proc_getattr,
4874 .setattr = nfs4_proc_setattr,
2b3de441 4875 .lookupfh = nfs4_proc_lookupfh,
1da177e4
LT		 4876 .lookup = nfs4_proc_lookup,
4877 .access = nfs4_proc_access,
4878 .readlink = nfs4_proc_readlink,
1da177e4
LT		 4879 .create = nfs4_proc_create,
4880 .remove = nfs4_proc_remove,
4881 .unlink_setup = nfs4_proc_unlink_setup,
4882 .unlink_done = nfs4_proc_unlink_done,
4883 .rename = nfs4_proc_rename,
4884 .link = nfs4_proc_link,
4885 .symlink = nfs4_proc_symlink,
4886 .mkdir = nfs4_proc_mkdir,
4887 .rmdir = nfs4_proc_remove,
4888 .readdir = nfs4_proc_readdir,
4889 .mknod = nfs4_proc_mknod,
4890 .statfs = nfs4_proc_statfs,
4891 .fsinfo = nfs4_proc_fsinfo,
4892 .pathconf = nfs4_proc_pathconf,
e9326dca 4893 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 4894 .decode_dirent = nfs4_decode_dirent,
4895 .read_setup = nfs4_proc_read_setup,
ec06c096 4896 .read_done = nfs4_read_done,
1da177e4 4897 .write_setup = nfs4_proc_write_setup,
788e7a89 4898 .write_done = nfs4_write_done,
1da177e4 4899 .commit_setup = nfs4_proc_commit_setup,
788e7a89 4900 .commit_done = nfs4_commit_done,
1da177e4 4901 .lock = nfs4_proc_lock,
e50a1c2e 4902 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 4903 .close_context = nfs4_close_context,
1da177e4
LT		 4904};
4905
4906/*
4907 * Local variables:
4908 * c-basic-offset: 8
4909 * End:
4910 */
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