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NFSD: allow inter server COPY to have a STALE source server fh
[linux.git] / fs / nfsd / nfs4proc.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <[email protected]>
8 * Andy Adamson <[email protected]>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4 34 */
880a3a53 35#include <linux/fs_struct.h>
7e06b7f9 36#include <linux/file.h>
b0cb9085 37#include <linux/falloc.h>
5a0e3ad6 38#include <linux/slab.h>
e0639dc5 39#include <linux/kthread.h>
624322f1 40#include <linux/sunrpc/addr.h>
1da177e4 41
58e7b33a 42#include "idmap.h"
9a74af21
BH		 43#include "cache.h"
44#include "xdr4.h"
0a3adade 45#include "vfs.h"
8b70484c 46#include "current_stateid.h"
3320fef1 47#include "netns.h"
4ac7249e 48#include "acl.h"
9cf514cc 49#include "pnfs.h"
31ef83dc 50#include "trace.h"
1da177e4 51
18032ca0
DQ		 52#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
53#include <linux/security.h>
54
55static inline void
56nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
57{
2b0143b5 58 struct inode *inode = d_inode(resfh->fh_dentry);
18032ca0
DQ		 59 int status;
60
5955102c 61 inode_lock(inode);
18032ca0
DQ		 62 status = security_inode_setsecctx(resfh->fh_dentry,
63 label->data, label->len);
5955102c 64 inode_unlock(inode);
18032ca0
DQ		 65
66 if (status)
67 /*
68 * XXX: We should really fail the whole open, but we may
69 * already have created a new file, so it may be too
70 * late. For now this seems the least of evils:
71 */
72 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
73
74 return;
75}
76#else
77static inline void
78nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
79{ }
80#endif
81
1da177e4
LT		 82#define NFSDDBG_FACILITY NFSDDBG_PROC
83
3c8e0316
YZ		 84static u32 nfsd_attrmask[] = {
85 NFSD_WRITEABLE_ATTRS_WORD0,
86 NFSD_WRITEABLE_ATTRS_WORD1,
87 NFSD_WRITEABLE_ATTRS_WORD2
88};
89
90static u32 nfsd41_ex_attrmask[] = {
91 NFSD_SUPPATTR_EXCLCREAT_WORD0,
92 NFSD_SUPPATTR_EXCLCREAT_WORD1,
93 NFSD_SUPPATTR_EXCLCREAT_WORD2
94};
95
96static __be32
97check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
98 u32 *bmval, u32 *writable)
99{
100 struct dentry *dentry = cstate->current_fh.fh_dentry;
32ddd944 101 struct svc_export *exp = cstate->current_fh.fh_export;
3c8e0316 102
916d2d84 103 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
3c8e0316 104 return nfserr_attrnotsupp;
916d2d84
BF		 105 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
106 return nfserr_attrnotsupp;
32ddd944
BF		 107 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
108 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
109 return nfserr_attrnotsupp;
916d2d84
BF		 110 if (writable && !bmval_is_subset(bmval, writable))
111 return nfserr_inval;
47057abd
AG		 112 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
113 (bmval[1] & FATTR4_WORD1_MODE))
114 return nfserr_inval;
3c8e0316
YZ		 115 return nfs_ok;
116}
117
118static __be32
119nfsd4_check_open_attributes(struct svc_rqst *rqstp,
120 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
121{
122 __be32 status = nfs_ok;
123
124 if (open->op_create == NFS4_OPEN_CREATE) {
125 if (open->op_createmode == NFS4_CREATE_UNCHECKED
126 || open->op_createmode == NFS4_CREATE_GUARDED)
127 status = check_attr_support(rqstp, cstate,
128 open->op_bmval, nfsd_attrmask);
129 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
130 status = check_attr_support(rqstp, cstate,
131 open->op_bmval, nfsd41_ex_attrmask);
132 }
133
134 return status;
135}
136
9208faf2
YZ		 137static int
138is_create_with_attrs(struct nfsd4_open *open)
139{
140 return open->op_create == NFS4_OPEN_CREATE
141 && (open->op_createmode == NFS4_CREATE_UNCHECKED
142 || open->op_createmode == NFS4_CREATE_GUARDED
143 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
144}
145
146/*
147 * if error occurs when setting the acl, just clear the acl bit
148 * in the returned attr bitmap.
149 */
150static void
151do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
152 struct nfs4_acl *acl, u32 *bmval)
153{
154 __be32 status;
155
156 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
157 if (status)
158 /*
159 * We should probably fail the whole open at this point,
160 * but we've already created the file, so it's too late;
161 * So this seems the least of evils:
162 */
163 bmval[0] &= ~FATTR4_WORD0_ACL;
164}
165
1da177e4
LT		 166static inline void
167fh_dup2(struct svc_fh *dst, struct svc_fh *src)
168{
169 fh_put(dst);
170 dget(src->fh_dentry);
171 if (src->fh_export)
bf18f163 172 exp_get(src->fh_export);
1da177e4
LT		 173 *dst = *src;
174}
175
b37ad28b 176static __be32
dc730e17 177do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
1da177e4 178{
b37ad28b 179 __be32 status;
1da177e4
LT		 180
181 if (open->op_truncate &&
182 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
183 return nfserr_inval;
184
a043226b
BF		 185 accmode |= NFSD_MAY_READ_IF_EXEC;
186
1da177e4 187 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
8837abca 188 accmode |= NFSD_MAY_READ;
9801d8a3 189 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
8837abca 190 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
57ecb34f 191 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
8837abca 192 accmode |= NFSD_MAY_WRITE;
1da177e4
LT		 193
194 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
195
196 return status;
197}
198
aadab6c6
BF		 199static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
200{
2b0143b5 201 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
aadab6c6
BF		 202
203 if (S_ISREG(mode))
204 return nfs_ok;
205 if (S_ISDIR(mode))
206 return nfserr_isdir;
207 /*
208 * Using err_symlink as our catch-all case may look odd; but
209 * there's no other obvious error for this case in 4.0, and we
210 * happen to know that it will cause the linux v4 client to do
211 * the right thing on attempts to open something other than a
212 * regular file.
213 */
214 return nfserr_symlink;
215}
216
bbc9c36c
BF		 217static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
218{
219 if (nfsd4_has_session(cstate))
220 return;
221 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
222 &resfh->fh_handle);
223}
224
b37ad28b 225static __be32
c0e6bee4 226do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
1da177e4 227{
bbc9c36c 228 struct svc_fh *current_fh = &cstate->current_fh;
7007c90f 229 int accmode;
b37ad28b 230 __be32 status;
1da177e4 231
c0e6bee4
BF		 232 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
233 if (!*resfh)
59deeb9e 234 return nfserr_jukebox;
c0e6bee4 235 fh_init(*resfh, NFS4_FHSIZE);
1da177e4
LT		 236 open->op_truncate = 0;
237
238 if (open->op_create) {
79fb54ab
BH		 239 /* FIXME: check session persistence and pnfs flags.
240 * The nfsv4.1 spec requires the following semantics:
241 *
242 * Persistent | pNFS | Server REQUIRED | Client Allowed
243 * Reply Cache | server | |
244 * -------------+--------+-----------------+--------------------
245 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
246 * | | | (SHOULD)
247 * | | and EXCLUSIVE4 | or EXCLUSIVE4
248 * | | | (SHOULD NOT)
249 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
250 * yes | no | GUARDED4 | GUARDED4
251 * yes | yes | GUARDED4 | GUARDED4
252 */
253
1da177e4
LT		 254 /*
255 * Note: create modes (UNCHECKED,GUARDED...) are the same
ac6721a1 256 * in NFSv4 as in v3 except EXCLUSIVE4_1.
1da177e4 257 */
880a3a53 258 current->fs->umask = open->op_umask;
ac6721a1 259 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
1da177e4 260 open->op_fname.len, &open->op_iattr,
c0e6bee4 261 *resfh, open->op_createmode,
749997e5 262 (u32 *)open->op_verf.data,
856121b2 263 &open->op_truncate, &open->op_created);
880a3a53 264 current->fs->umask = 0;
749997e5 265
18032ca0 266 if (!status && open->op_label.len)
c0e6bee4 267 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
18032ca0 268
99f88726 269 /*
ead8fb8c
KM		 270 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
271 * use the returned bitmask to indicate which attributes
272 * we used to store the verifier:
749997e5 273 */
ead8fb8c
KM		 274 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
275 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
276 FATTR4_WORD1_TIME_MODIFY);
4335723e
BF		 277 } else
278 /*
279 * Note this may exit with the parent still locked.
280 * We will hold the lock until nfsd4_open's final
281 * lookup, to prevent renames or unlinks until we've had
282 * a chance to an acquire a delegation if appropriate.
283 */
1da177e4 284 status = nfsd_lookup(rqstp, current_fh,
c0e6bee4 285 open->op_fname.data, open->op_fname.len, *resfh);
9dc4e6c4
BF		 286 if (status)
287 goto out;
c0e6bee4 288 status = nfsd_check_obj_isreg(*resfh);
af85852d
BF		 289 if (status)
290 goto out;
1da177e4 291
9208faf2 292 if (is_create_with_attrs(open) && open->op_acl != NULL)
c0e6bee4 293 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
9208faf2 294
c0e6bee4 295 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
7007c90f 296 accmode = NFSD_MAY_NOP;
89f6c336
BF		 297 if (open->op_created ||
298 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
7007c90f 299 accmode |= NFSD_MAY_OWNER_OVERRIDE;
c0e6bee4 300 status = do_open_permission(rqstp, *resfh, open, accmode);
41fd1e42 301 set_change_info(&open->op_cinfo, current_fh);
af85852d 302out:
1da177e4
LT		 303 return status;
304}
305
b37ad28b 306static __be32
bbc9c36c 307do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
1da177e4 308{
bbc9c36c 309 struct svc_fh *current_fh = &cstate->current_fh;
b37ad28b 310 __be32 status;
9f415eb2 311 int accmode = 0;
1da177e4 312
1da177e4
LT		 313 /* We don't know the target directory, and therefore can not
314 * set the change info
315 */
316
317 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
318
bbc9c36c 319 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
1da177e4
LT		 320
321 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
322 (open->op_iattr.ia_size == 0);
9f415eb2
BF		 323 /*
324 * In the delegation case, the client is telling us about an
325 * open that it *already* performed locally, some time ago. We
326 * should let it succeed now if possible.
327 *
328 * In the case of a CLAIM_FH open, on the other hand, the client
329 * may be counting on us to enforce permissions (the Linux 4.1
330 * client uses this for normal opens, for example).
331 */
332 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
333 accmode = NFSD_MAY_OWNER_OVERRIDE;
1da177e4 334
9f415eb2 335 status = do_open_permission(rqstp, current_fh, open, accmode);
1da177e4
LT		 336
337 return status;
338}
339
60adfc50
AA		 340static void
341copy_clientid(clientid_t *clid, struct nfsd4_session *session)
342{
343 struct nfsd4_sessionid *sid =
344 (struct nfsd4_sessionid *)session->se_sessionid.data;
345
346 clid->cl_boot = sid->clientid.cl_boot;
347 clid->cl_id = sid->clientid.cl_id;
348}
1da177e4 349
7191155b 350static __be32
ca364317 351nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 352 union nfsd4_op_u *u)
1da177e4 353{
eb69853d 354 struct nfsd4_open *open = &u->open;
b37ad28b 355 __be32 status;
c0e6bee4 356 struct svc_fh *resfh = NULL;
3320fef1
SK		 357 struct net *net = SVC_NET(rqstp);
358 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
03f318ca 359 bool reclaim = false;
6668958f 360
fe0750e5 361 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 362 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 363 open->op_openowner);
1da177e4 364
1da177e4
LT		 365 /* This check required by spec. */
366 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
367 return nfserr_inval;
368
856121b2 369 open->op_created = 0;
ab1350b2
MJ		 370 /*
371 * RFC5661 18.51.3
372 * Before RECLAIM_COMPLETE done, server should deny new lock
373 */
374 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 375 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
376 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 377 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
378 return nfserr_grace;
379
60adfc50
AA		 380 if (nfsd4_has_session(cstate))
381 copy_clientid(&open->op_clientid, cstate->session);
382
1da177e4 383 /* check seqid for replay. set nfs4_owner */
6cd22668 384 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 385 if (status == nfserr_replay_me) {
fe0750e5 386 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 387 fh_put(&cstate->current_fh);
a4773c08
BF		 388 fh_copy_shallow(&cstate->current_fh.fh_handle,
389 &rp->rp_openfh);
8837abca 390 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 391 if (status)
392 dprintk("nfsd4_open: replay failed"
393 " restoring previous filehandle\n");
394 else
a90b061c 395 status = nfserr_replay_me;
1da177e4
LT		 396 }
397 if (status)
398 goto out;
9d313b17
BF		 399 if (open->op_xdr_error) {
400 status = open->op_xdr_error;
401 goto out;
402 }
fb553c0f 403
3c8e0316
YZ		 404 status = nfsd4_check_open_attributes(rqstp, cstate, open);
405 if (status)
406 goto out;
407
fb553c0f
BF		 408 /* Openowner is now set, so sequence id will get bumped. Now we need
409 * these checks before we do any creates: */
cbd0d51a 410 status = nfserr_grace;
c87fb4a3 411 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 412 goto out;
413 status = nfserr_no_grace;
c87fb4a3 414 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 415 goto out;
fb553c0f 416
1da177e4 417 switch (open->op_claim_type) {
0dd3c192 418 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 419 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 420 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 421 if (status)
422 goto out;
423 break;
424 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 425 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 426 cstate, nn);
0cf99b91
MJ		 427 if (status)
428 goto out;
ba5378b6 429 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
03f318ca 430 reclaim = true;
0a4c9265 431 /* fall through */
8b289b2c
BF		 432 case NFS4_OPEN_CLAIM_FH:
433 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 434 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 435 if (status)
436 goto out;
c0e6bee4 437 resfh = &cstate->current_fh;
1da177e4 438 break;
8b289b2c 439 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 440 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 441 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 442 open->op_claim_type);
443 status = nfserr_notsupp;
444 goto out;
445 default:
2fdada03 446 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 447 open->op_claim_type);
448 status = nfserr_inval;
449 goto out;
450 }
451 /*
452 * nfsd4_process_open2() does the actual opening of the file. If
453 * successful, it (1) truncates the file if open->op_truncate was
454 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
455 */
c0e6bee4 456 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 457 WARN(status && open->op_created,
458 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
459 be32_to_cpu(status));
03f318ca
BF		 460 if (reclaim && !status)
461 nn->somebody_reclaimed = true;
1da177e4 462out:
c0e6bee4
BF		 463 if (resfh && resfh != &cstate->current_fh) {
464 fh_dup2(&cstate->current_fh, resfh);
465 fh_put(resfh);
466 kfree(resfh);
467 }
42297899 468 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 469 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 470 return status;
471}
472
9d313b17
BF		 473/*
474 * OPEN is the only seqid-mutating operation whose decoding can fail
475 * with a seqid-mutating error (specifically, decoding of user names in
476 * the attributes). Therefore we have to do some processing to look up
477 * the stateowner so that we can bump the seqid.
478 */
479static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
480{
eb69853d 481 struct nfsd4_open *open = &op->u.open;
9d313b17
BF		 482
483 if (!seqid_mutating_err(ntohl(op->status)))
484 return op->status;
485 if (nfsd4_has_session(cstate))
486 return op->status;
487 open->op_xdr_error = op->status;
eb69853d 488 return nfsd4_open(rqstp, cstate, &op->u);
9d313b17
BF		 489}
490
1da177e4
LT		 491/*
492 * filehandle-manipulating ops.
493 */
7191155b 494static __be32
b591480b 495nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 496 union nfsd4_op_u *u)
1da177e4 497{
eb69853d 498 u->getfh = &cstate->current_fh;
1da177e4
LT		 499 return nfs_ok;
500}
501
7191155b 502static __be32
ca364317 503nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 504 union nfsd4_op_u *u)
1da177e4 505{
eb69853d 506 struct nfsd4_putfh *putfh = &u->putfh;
b9e8638e 507 __be32 ret;
eb69853d 508
ca364317
BF		 509 fh_put(&cstate->current_fh);
510 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
511 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
512 putfh->pf_fhlen);
b9e8638e
OK		 513 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
514#ifdef CONFIG_NFSD_V4_2_INTER_SSC
515 if (ret == nfserr_stale && putfh->no_verify) {
516 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
517 ret = 0;
518 }
519#endif
520 return ret;
1da177e4
LT		 521}
522
7191155b 523static __be32
b591480b 524nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 525 union nfsd4_op_u *u)
1da177e4 526{
b37ad28b 527 __be32 status;
1da177e4 528
ca364317 529 fh_put(&cstate->current_fh);
df547efb 530 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 531 return status;
532}
533
7191155b 534static __be32
b591480b 535nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 536 union nfsd4_op_u *u)
1da177e4 537{
ca364317 538 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 539 return nfserr_restorefh;
540
ca364317 541 fh_dup2(&cstate->current_fh, &cstate->save_fh);
51100d2b 542 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
37c593c5 543 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
51100d2b 544 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
37c593c5 545 }
1da177e4
LT		 546 return nfs_ok;
547}
548
7191155b 549static __be32
b591480b 550nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 551 union nfsd4_op_u *u)
1da177e4 552{
ca364317 553 fh_dup2(&cstate->save_fh, &cstate->current_fh);
51100d2b 554 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
37c593c5 555 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
51100d2b 556 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
37c593c5 557 }
1da177e4
LT		 558 return nfs_ok;
559}
560
561/*
562 * misc nfsv4 ops
563 */
7191155b 564static __be32
ca364317 565nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 566 union nfsd4_op_u *u)
1da177e4 567{
eb69853d
CH		 568 struct nfsd4_access *access = &u->access;
569
1da177e4
LT		 570 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
571 return nfserr_inval;
572
573 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 574 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
575 &access->ac_supported);
1da177e4
LT		 576}
577
b9c0ef85 578static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1 579{
27c438f5 580 __be32 *verf = (__be32 *)verifier->data;
ab4684d1 581
27c438f5
TM		 582 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
583
584 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
ab4684d1
CL		 585}
586
7191155b 587static __be32
ca364317 588nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 589 union nfsd4_op_u *u)
1da177e4 590{
eb69853d
CH		 591 struct nfsd4_commit *commit = &u->commit;
592
b9c0ef85 593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
75c096f7 594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
ca364317 595 commit->co_count);
1da177e4
LT		 596}
597
b37ad28b 598static __be32
ca364317 599nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 600 union nfsd4_op_u *u)
1da177e4 601{
eb69853d 602 struct nfsd4_create *create = &u->create;
1da177e4 603 struct svc_fh resfh;
b37ad28b 604 __be32 status;
1da177e4
LT		 605 dev_t rdev;
606
607 fh_init(&resfh, NFS4_FHSIZE);
608
fa08139d 609 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 610 if (status)
611 return status;
612
3c8e0316
YZ		 613 status = check_attr_support(rqstp, cstate, create->cr_bmval,
614 nfsd_attrmask);
615 if (status)
616 return status;
617
880a3a53 618 current->fs->umask = create->cr_umask;
1da177e4
LT		 619 switch (create->cr_type) {
620 case NF4LNK:
ca364317
BF		 621 status = nfsd_symlink(rqstp, &cstate->current_fh,
622 create->cr_name, create->cr_namelen,
1e444f5b 623 create->cr_data, &resfh);
1da177e4
LT		 624 break;
625
626 case NF4BLK:
880a3a53 627 status = nfserr_inval;
1da177e4
LT		 628 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
629 if (MAJOR(rdev) != create->cr_specdata1 ||
630 MINOR(rdev) != create->cr_specdata2)
880a3a53 631 goto out_umask;
ca364317
BF		 632 status = nfsd_create(rqstp, &cstate->current_fh,
633 create->cr_name, create->cr_namelen,
634 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 635 break;
636
637 case NF4CHR:
880a3a53 638 status = nfserr_inval;
1da177e4
LT		 639 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
640 if (MAJOR(rdev) != create->cr_specdata1 ||
641 MINOR(rdev) != create->cr_specdata2)
880a3a53 642 goto out_umask;
ca364317
BF		 643 status = nfsd_create(rqstp, &cstate->current_fh,
644 create->cr_name, create->cr_namelen,
645 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 646 break;
647
648 case NF4SOCK:
ca364317
BF		 649 status = nfsd_create(rqstp, &cstate->current_fh,
650 create->cr_name, create->cr_namelen,
651 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 652 break;
653
654 case NF4FIFO:
ca364317
BF		 655 status = nfsd_create(rqstp, &cstate->current_fh,
656 create->cr_name, create->cr_namelen,
657 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 658 break;
659
660 case NF4DIR:
661 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 662 status = nfsd_create(rqstp, &cstate->current_fh,
663 create->cr_name, create->cr_namelen,
664 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 665 break;
666
667 default:
668 status = nfserr_badtype;
669 }
670
9208faf2
YZ		 671 if (status)
672 goto out;
1da177e4 673
18032ca0
DQ		 674 if (create->cr_label.len)
675 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
676
9208faf2
YZ		 677 if (create->cr_acl != NULL)
678 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
679 create->cr_bmval);
680
681 fh_unlock(&cstate->current_fh);
682 set_change_info(&create->cr_cinfo, &cstate->current_fh);
683 fh_dup2(&cstate->current_fh, &resfh);
684out:
1da177e4 685 fh_put(&resfh);
880a3a53
BF		 686out_umask:
687 current->fs->umask = 0;
1da177e4
LT		 688 return status;
689}
690
7191155b 691static __be32
ca364317 692nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 693 union nfsd4_op_u *u)
1da177e4 694{
eb69853d 695 struct nfsd4_getattr *getattr = &u->getattr;
b37ad28b 696 __be32 status;
1da177e4 697
8837abca 698 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 699 if (status)
700 return status;
701
702 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
703 return nfserr_inval;
704
916d2d84
BF		 705 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
706 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
707 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 708
ca364317 709 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 710 return nfs_ok;
711}
712
7191155b 713static __be32
ca364317 714nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 715 union nfsd4_op_u *u)
1da177e4 716{
eb69853d 717 struct nfsd4_link *link = &u->link;
95424460 718 __be32 status;
1da177e4 719
ca364317
BF		 720 status = nfsd_link(rqstp, &cstate->current_fh,
721 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 722 if (!status)
ca364317 723 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 724 return status;
725}
726
0ff7ab46 727static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 728{
729 struct svc_fh tmp_fh;
b37ad28b 730 __be32 ret;
1da177e4
LT		 731
732 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 733 ret = exp_pseudoroot(rqstp, &tmp_fh);
734 if (ret)
1da177e4 735 return ret;
0ff7ab46 736 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 737 fh_put(&tmp_fh);
738 return nfserr_noent;
739 }
740 fh_put(&tmp_fh);
0ff7ab46
BF		 741 return nfsd_lookup(rqstp, fh, "..", 2, fh);
742}
743
744static __be32
745nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 746 union nfsd4_op_u *u)
0ff7ab46
BF		 747{
748 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 749}
750
7191155b 751static __be32
ca364317 752nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 753 union nfsd4_op_u *u)
1da177e4 754{
ca364317 755 return nfsd_lookup(rqstp, &cstate->current_fh,
eb69853d 756 u->lookup.lo_name, u->lookup.lo_len,
ca364317 757 &cstate->current_fh);
1da177e4
LT		 758}
759
7191155b 760static __be32
ca364317 761nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 762 union nfsd4_op_u *u)
1da177e4 763{
eb69853d 764 struct nfsd4_read *read = &u->read;
b37ad28b 765 __be32 status;
1da177e4 766
5c4583b2 767 read->rd_nf = NULL;
1da177e4
LT		 768 if (read->rd_offset >= OFFSET_MAX)
769 return nfserr_inval;
770
87c5942e
CL		 771 trace_nfsd_read_start(rqstp, &cstate->current_fh,
772 read->rd_offset, read->rd_length);
773
9b3234b9
BF		 774 /*
775 * If we do a zero copy read, then a client will see read data
776 * that reflects the state of the file *after* performing the
777 * following compound.
778 *
779 * To ensure proper ordering, we therefore turn off zero copy if
780 * the client wants us to do more in this compound:
781 */
782 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 783 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 784
1da177e4 785 /* check stateid */
aa0d6aed
AS		 786 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
787 &read->rd_stateid, RD_STATE,
624322f1 788 &read->rd_nf, NULL);
af90f707 789 if (status) {
1da177e4
LT		 790 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
791 goto out;
792 }
793 status = nfs_ok;
794out:
1da177e4 795 read->rd_rqstp = rqstp;
ca364317 796 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 797 return status;
798}
799
34b1744c
BF		 800
801static void
802nfsd4_read_release(union nfsd4_op_u *u)
803{
5c4583b2
JL		 804 if (u->read.rd_nf)
805 nfsd_file_put(u->read.rd_nf);
87c5942e
CL		 806 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
807 u->read.rd_offset, u->read.rd_length);
34b1744c
BF		 808}
809
7191155b 810static __be32
ca364317 811nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 812 union nfsd4_op_u *u)
1da177e4 813{
eb69853d 814 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 815 u64 cookie = readdir->rd_cookie;
816 static const nfs4_verifier zeroverf;
817
818 /* no need to check permission - this will be done in nfsd_readdir() */
819
820 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
821 return nfserr_inval;
822
916d2d84
BF		 823 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
824 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
825 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 826
832023bf 827 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 828 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
829 return nfserr_bad_cookie;
830
831 readdir->rd_rqstp = rqstp;
ca364317 832 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 833 return nfs_ok;
834}
835
7191155b 836static __be32
ca364317 837nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 838 union nfsd4_op_u *u)
1da177e4 839{
eb69853d
CH		 840 u->readlink.rl_rqstp = rqstp;
841 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 842 return nfs_ok;
843}
844
7191155b 845static __be32
ca364317 846nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 847 union nfsd4_op_u *u)
1da177e4 848{
eb69853d 849 struct nfsd4_remove *remove = &u->remove;
b37ad28b 850 __be32 status;
1da177e4 851
c87fb4a3 852 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 853 return nfserr_grace;
ca364317
BF		 854 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
855 remove->rm_name, remove->rm_namelen);
1da177e4 856 if (!status) {
ca364317
BF		 857 fh_unlock(&cstate->current_fh);
858 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 859 }
860 return status;
861}
862
7191155b 863static __be32
ca364317 864nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 865 union nfsd4_op_u *u)
1da177e4 866{
eb69853d 867 struct nfsd4_rename *rename = &u->rename;
95424460 868 __be32 status;
1da177e4 869
f8f71d00 870 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 871 return nfserr_grace;
ca364317
BF		 872 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
873 rename->rn_snamelen, &cstate->current_fh,
1da177e4 874 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 875 if (status)
876 return status;
877 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
878 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
879 return nfs_ok;
1da177e4
LT		 880}
881
dcb488a3
AA		 882static __be32
883nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 884 union nfsd4_op_u *u)
dcb488a3 885{
eb69853d 886 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 887 struct svc_export *exp;
888 struct dentry *dentry;
889 __be32 err;
890
29a78a3e
BF		 891 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
892 if (err)
893 return err;
dcb488a3
AA		 894 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
895 secinfo->si_name, secinfo->si_namelen,
896 &exp, &dentry);
897 if (err)
898 return err;
2f6fc056 899 fh_unlock(&cstate->current_fh);
2b0143b5 900 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 901 exp_put(exp);
902 err = nfserr_noent;
903 } else
904 secinfo->si_exp = exp;
905 dput(dentry);
56560b9a
BF		 906 if (cstate->minorversion)
907 /* See rfc 5661 section 2.6.3.1.1.8 */
908 fh_put(&cstate->current_fh);
dcb488a3
AA		 909 return err;
910}
911
04f4ad16
BF		 912static __be32
913nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 914 union nfsd4_op_u *u)
04f4ad16
BF		 915{
916 __be32 err;
917
eb69853d 918 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 919 case NFS4_SECINFO_STYLE4_CURRENT_FH:
920 break;
921 case NFS4_SECINFO_STYLE4_PARENT:
922 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
923 if (err)
924 return err;
925 break;
926 default:
927 return nfserr_inval;
928 }
bf18f163 929
eb69853d 930 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 931 fh_put(&cstate->current_fh);
932 return nfs_ok;
933}
934
34b1744c
BF		 935static void
936nfsd4_secinfo_release(union nfsd4_op_u *u)
937{
938 if (u->secinfo.si_exp)
939 exp_put(u->secinfo.si_exp);
940}
941
ec572b9e
EG		 942static void
943nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
944{
945 if (u->secinfo_no_name.sin_exp)
946 exp_put(u->secinfo_no_name.sin_exp);
947}
948
7191155b 949static __be32
ca364317 950nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 951 union nfsd4_op_u *u)
1da177e4 952{
eb69853d 953 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 954 __be32 status = nfs_ok;
96f6f985 955 int err;
1da177e4 956
1da177e4 957 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 958 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed 959 &cstate->current_fh, &setattr->sa_stateid,
624322f1 960 WR_STATE, NULL, NULL);
375c5547 961 if (status) {
3e3b4800 962 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 963 return status;
964 }
1da177e4 965 }
96f6f985
AV		 966 err = fh_want_write(&cstate->current_fh);
967 if (err)
968 return nfserrno(err);
1da177e4 969 status = nfs_ok;
3c8e0316
YZ		 970
971 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
972 nfsd_attrmask);
973 if (status)
974 goto out;
975
1da177e4 976 if (setattr->sa_acl != NULL)
ca364317
BF		 977 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
978 setattr->sa_acl);
1da177e4 979 if (status)
18f335af 980 goto out;
18032ca0
DQ		 981 if (setattr->sa_label.len)
982 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
983 &setattr->sa_label);
984 if (status)
985 goto out;
ca364317 986 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 987 0, (time_t)0);
18f335af 988out:
bad0dcff 989 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 990 return status;
991}
992
7191155b 993static __be32
ca364317 994nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 995 union nfsd4_op_u *u)
1da177e4 996{
eb69853d 997 struct nfsd4_write *write = &u->write;
1da177e4 998 stateid_t *stateid = &write->wr_stateid;
5c4583b2 999 struct nfsd_file *nf = NULL;
b37ad28b 1000 __be32 status = nfs_ok;
31dec253 1001 unsigned long cnt;
ffe1137b 1002 int nvecs;
1da177e4 1003
1da177e4
LT		 1004 if (write->wr_offset >= OFFSET_MAX)
1005 return nfserr_inval;
1006
d890be15
CL		 1007 cnt = write->wr_buflen;
1008 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1009 write->wr_offset, cnt);
aa0d6aed 1010 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1011 stateid, WR_STATE, &nf, NULL);
375c5547
BF		 1012 if (status) {
1013 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1014 return status;
1015 }
1016
1da177e4 1017 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1018 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1019
3fd9557a
CL		 1020 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1021 &write->wr_head, write->wr_buflen);
ffe1137b
BF		 1022 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1023
5c4583b2 1024 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf->nf_file,
af90f707 1025 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 1026 write->wr_how_written);
5c4583b2 1027 nfsd_file_put(nf);
1da177e4 1028
31dec253 1029 write->wr_bytes_written = cnt;
d890be15
CL		 1030 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1031 write->wr_offset, cnt);
1da177e4 1032 return status;
1da177e4
LT		 1033}
1034
ffa0160a 1035static __be32
29ae7f9d 1036nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5c4583b2
JL		 1037 stateid_t *src_stateid, struct nfsd_file **src,
1038 stateid_t *dst_stateid, struct nfsd_file **dst)
ffa0160a 1039{
ffa0160a
CH		 1040 __be32 status;
1041
01310bb7
SM		 1042 if (!cstate->save_fh.fh_dentry)
1043 return nfserr_nofilehandle;
1044
ffa0160a 1045 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
624322f1 1046 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1047 if (status) {
1048 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1049 goto out;
1050 }
1051
1052 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1053 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1054 if (status) {
1055 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1056 goto out_put_src;
1057 }
1058
1059 /* fix up for NFS-specific error code */
5c4583b2
JL		 1060 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1061 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
ffa0160a
CH		 1062 status = nfserr_wrong_type;
1063 goto out_put_dst;
1064 }
1065
29ae7f9d
AS		 1066out:
1067 return status;
1068out_put_dst:
5c4583b2 1069 nfsd_file_put(*dst);
29ae7f9d 1070out_put_src:
5c4583b2 1071 nfsd_file_put(*src);
29ae7f9d
AS		 1072 goto out;
1073}
1074
1075static __be32
1076nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1077 union nfsd4_op_u *u)
29ae7f9d 1078{
eb69853d 1079 struct nfsd4_clone *clone = &u->clone;
5c4583b2 1080 struct nfsd_file *src, *dst;
29ae7f9d
AS		 1081 __be32 status;
1082
1083 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1084 &clone->cl_dst_stateid, &dst);
1085 if (status)
1086 goto out;
1087
5c4583b2 1088 status = nfsd4_clone_file_range(src->nf_file, clone->cl_src_pos,
a25e3726
TM		 1089 dst->nf_file, clone->cl_dst_pos, clone->cl_count,
1090 EX_ISSYNC(cstate->current_fh.fh_export));
ffa0160a 1091
5c4583b2
JL		 1092 nfsd_file_put(dst);
1093 nfsd_file_put(src);
ffa0160a
CH		 1094out:
1095 return status;
1096}
1097
e0639dc5
OK		 1098void nfs4_put_copy(struct nfsd4_copy *copy)
1099{
1100 if (!refcount_dec_and_test(&copy->refcount))
1101 return;
1102 kfree(copy);
1103}
1104
1105static bool
1106check_and_set_stop_copy(struct nfsd4_copy *copy)
1107{
1108 bool value;
1109
1110 spin_lock(&copy->cp_clp->async_lock);
1111 value = copy->stopped;
1112 if (!copy->stopped)
1113 copy->stopped = true;
1114 spin_unlock(&copy->cp_clp->async_lock);
1115 return value;
1116}
1117
1118static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1119{
1120 /* only 1 thread should stop the copy */
1121 if (!check_and_set_stop_copy(copy))
1122 kthread_stop(copy->copy_task);
1123 nfs4_put_copy(copy);
1124}
1125
1126static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1127{
1128 struct nfsd4_copy *copy = NULL;
1129
1130 spin_lock(&clp->async_lock);
1131 if (!list_empty(&clp->async_copies)) {
1132 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1133 copies);
1134 refcount_inc(&copy->refcount);
1135 }
1136 spin_unlock(&clp->async_lock);
1137 return copy;
1138}
1139
1140void nfsd4_shutdown_copy(struct nfs4_client *clp)
1141{
1142 struct nfsd4_copy *copy;
1143
1144 while ((copy = nfsd4_get_copy(clp)) != NULL)
1145 nfsd4_stop_copy(copy);
1146}
1147
1148static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1149{
1150 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1151
1152 nfs4_put_copy(copy);
1153}
1154
1155static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1156 struct rpc_task *task)
1157{
1158 return 1;
1159}
1160
1161static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1162 .release = nfsd4_cb_offload_release,
1163 .done = nfsd4_cb_offload_done
1164};
1165
1166static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1167{
1168 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1169 copy->cp_synchronous = sync;
1170 gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
1171}
1172
1173static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1174{
1175 ssize_t bytes_copied = 0;
1176 size_t bytes_total = copy->cp_count;
1177 u64 src_pos = copy->cp_src_pos;
1178 u64 dst_pos = copy->cp_dst_pos;
1179
1180 do {
1181 if (kthread_should_stop())
1182 break;
5c4583b2
JL		 1183 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1184 src_pos, copy->nf_dst->nf_file, dst_pos,
1185 bytes_total);
e0639dc5
OK		 1186 if (bytes_copied <= 0)
1187 break;
1188 bytes_total -= bytes_copied;
1189 copy->cp_res.wr_bytes_written += bytes_copied;
1190 src_pos += bytes_copied;
1191 dst_pos += bytes_copied;
1192 } while (bytes_total > 0 && !copy->cp_synchronous);
1193 return bytes_copied;
1194}
1195
1196static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1197{
1198 __be32 status;
1199 ssize_t bytes;
1200
1201 bytes = _nfsd_copy_file_range(copy);
1202 /* for async copy, we ignore the error, client can always retry
1203 * to get the error
1204 */
1205 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1206 status = nfserrno(bytes);
1207 else {
1208 nfsd4_init_copy_res(copy, sync);
1209 status = nfs_ok;
1210 }
1211
5c4583b2
JL		 1212 nfsd_file_put(copy->nf_src);
1213 nfsd_file_put(copy->nf_dst);
e0639dc5
OK		 1214 return status;
1215}
1216
1217static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
1218{
1219 dst->cp_src_pos = src->cp_src_pos;
1220 dst->cp_dst_pos = src->cp_dst_pos;
1221 dst->cp_count = src->cp_count;
1222 dst->cp_synchronous = src->cp_synchronous;
1223 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1224 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1225 dst->cp_clp = src->cp_clp;
5c4583b2
JL		 1226 dst->nf_dst = nfsd_file_get(src->nf_dst);
1227 dst->nf_src = nfsd_file_get(src->nf_src);
e0639dc5
OK		 1228 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
1229}
1230
1231static void cleanup_async_copy(struct nfsd4_copy *copy)
1232{
624322f1 1233 nfs4_free_copy_state(copy);
5c4583b2
JL		 1234 nfsd_file_put(copy->nf_dst);
1235 nfsd_file_put(copy->nf_src);
e0639dc5
OK		 1236 spin_lock(&copy->cp_clp->async_lock);
1237 list_del(&copy->copies);
1238 spin_unlock(&copy->cp_clp->async_lock);
1239 nfs4_put_copy(copy);
1240}
1241
1242static int nfsd4_do_async_copy(void *data)
1243{
1244 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1245 struct nfsd4_copy *cb_copy;
1246
1247 copy->nfserr = nfsd4_do_copy(copy, 0);
1248 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1249 if (!cb_copy)
1250 goto out;
1251 memcpy(&cb_copy->cp_res, &copy->cp_res, sizeof(copy->cp_res));
1252 cb_copy->cp_clp = copy->cp_clp;
1253 cb_copy->nfserr = copy->nfserr;
1254 memcpy(&cb_copy->fh, &copy->fh, sizeof(copy->fh));
1255 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1256 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1257 nfsd4_run_cb(&cb_copy->cp_cb);
1258out:
1259 cleanup_async_copy(copy);
1260 return 0;
1261}
1262
29ae7f9d
AS		 1263static __be32
1264nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1265 union nfsd4_op_u *u)
29ae7f9d 1266{
eb69853d 1267 struct nfsd4_copy *copy = &u->copy;
29ae7f9d 1268 __be32 status;
e0639dc5 1269 struct nfsd4_copy *async_copy = NULL;
29ae7f9d 1270
e0639dc5 1271 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
5c4583b2
JL		 1272 &copy->nf_src, &copy->cp_dst_stateid,
1273 &copy->nf_dst);
29ae7f9d
AS		 1274 if (status)
1275 goto out;
1276
e0639dc5
OK		 1277 copy->cp_clp = cstate->clp;
1278 memcpy(&copy->fh, &cstate->current_fh.fh_handle,
1279 sizeof(struct knfsd_fh));
1280 if (!copy->cp_synchronous) {
1281 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
29ae7f9d 1282
e0639dc5
OK		 1283 status = nfserrno(-ENOMEM);
1284 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1285 if (!async_copy)
1286 goto out;
624322f1 1287 if (!nfs4_init_copy_state(nn, copy)) {
e0639dc5
OK		 1288 kfree(async_copy);
1289 goto out;
1290 }
1291 refcount_set(&async_copy->refcount, 1);
1292 memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid,
1293 sizeof(copy->cp_stateid));
1294 dup_copy_fields(copy, async_copy);
1295 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1296 async_copy, "%s", "copy thread");
1297 if (IS_ERR(async_copy->copy_task))
1298 goto out_err;
1299 spin_lock(&async_copy->cp_clp->async_lock);
1300 list_add(&async_copy->copies,
1301 &async_copy->cp_clp->async_copies);
1302 spin_unlock(&async_copy->cp_clp->async_lock);
1303 wake_up_process(async_copy->copy_task);
29ae7f9d 1304 status = nfs_ok;
e0639dc5
OK		 1305 } else
1306 status = nfsd4_do_copy(copy, 1);
29ae7f9d
AS		 1307out:
1308 return status;
e0639dc5 1309out_err:
18f428d4
OK		 1310 if (async_copy)
1311 cleanup_async_copy(async_copy);
e0639dc5
OK		 1312 goto out;
1313}
1314
1315struct nfsd4_copy *
1316find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1317{
1318 struct nfsd4_copy *copy;
1319
1320 spin_lock(&clp->async_lock);
1321 list_for_each_entry(copy, &clp->async_copies, copies) {
1322 if (memcmp(&copy->cp_stateid, stateid, NFS4_STATEID_SIZE))
1323 continue;
1324 refcount_inc(&copy->refcount);
1325 spin_unlock(&clp->async_lock);
1326 return copy;
1327 }
1328 spin_unlock(&clp->async_lock);
1329 return NULL;
29ae7f9d
AS		 1330}
1331
885e2bf3
OK		 1332static __be32
1333nfsd4_offload_cancel(struct svc_rqst *rqstp,
1334 struct nfsd4_compound_state *cstate,
1335 union nfsd4_op_u *u)
1336{
e0639dc5
OK		 1337 struct nfsd4_offload_status *os = &u->offload_status;
1338 __be32 status = 0;
1339 struct nfsd4_copy *copy;
1340 struct nfs4_client *clp = cstate->clp;
1341
1342 copy = find_async_copy(clp, &os->stateid);
1343 if (copy)
1344 nfsd4_stop_copy(copy);
1345 else
1346 status = nfserr_bad_stateid;
1347
1348 return status;
885e2bf3
OK		 1349}
1350
51911868
OK		 1351static __be32
1352nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1353 union nfsd4_op_u *u)
1354{
624322f1
OK		 1355 struct nfsd4_copy_notify *cn = &u->copy_notify;
1356 __be32 status;
1357 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1358 struct nfs4_stid *stid;
1359 struct nfs4_cpntf_state *cps;
1360 struct nfs4_client *clp = cstate->clp;
1361
1362 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1363 &cn->cpn_src_stateid, RD_STATE, NULL,
1364 &stid);
1365 if (status)
1366 return status;
1367
1368 cn->cpn_sec = nn->nfsd4_lease;
1369 cn->cpn_nsec = 0;
1370
1371 status = nfserrno(-ENOMEM);
1372 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1373 if (!cps)
1374 goto out;
1375 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1376 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1377 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1378
1379 /* For now, only return one server address in cpn_src, the
1380 * address used by the client to connect to this server.
1381 */
1382 cn->cpn_src.nl4_type = NL4_NETADDR;
1383 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1384 &cn->cpn_src.u.nl4_addr);
1385 WARN_ON_ONCE(status);
1386 if (status) {
1387 nfs4_put_cpntf_state(nn, cps);
1388 goto out;
1389 }
1390out:
1391 nfs4_put_stid(stid);
1392 return status;
51911868
OK		 1393}
1394
95d871f0
AS		 1395static __be32
1396nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1397 struct nfsd4_fallocate *fallocate, int flags)
1398{
0d4d6720 1399 __be32 status;
5c4583b2 1400 struct nfsd_file *nf;
95d871f0 1401
aa0d6aed 1402 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1403 &fallocate->falloc_stateid,
624322f1 1404 WR_STATE, &nf, NULL);
95d871f0
AS		 1405 if (status != nfs_ok) {
1406 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1407 return status;
1408 }
1409
5c4583b2 1410 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
95d871f0
AS		 1411 fallocate->falloc_offset,
1412 fallocate->falloc_length,
1413 flags);
5c4583b2 1414 nfsd_file_put(nf);
95d871f0
AS		 1415 return status;
1416}
6308bc98
OK		 1417static __be32
1418nfsd4_offload_status(struct svc_rqst *rqstp,
1419 struct nfsd4_compound_state *cstate,
1420 union nfsd4_op_u *u)
1421{
e0639dc5
OK		 1422 struct nfsd4_offload_status *os = &u->offload_status;
1423 __be32 status = 0;
1424 struct nfsd4_copy *copy;
1425 struct nfs4_client *clp = cstate->clp;
1426
1427 copy = find_async_copy(clp, &os->stateid);
1428 if (copy) {
1429 os->count = copy->cp_res.wr_bytes_written;
1430 nfs4_put_copy(copy);
1431 } else
1432 status = nfserr_bad_stateid;
1433
1434 return status;
6308bc98 1435}
95d871f0
AS		 1436
1437static __be32
1438nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1439 union nfsd4_op_u *u)
95d871f0 1440{
eb69853d 1441 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1442}
1443
b0cb9085
AS		 1444static __be32
1445nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1446 union nfsd4_op_u *u)
b0cb9085 1447{
eb69853d 1448 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1449 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1450}
1451
24bab491
AS		 1452static __be32
1453nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1454 union nfsd4_op_u *u)
24bab491 1455{
eb69853d 1456 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1457 int whence;
1458 __be32 status;
5c4583b2 1459 struct nfsd_file *nf;
24bab491 1460
aa0d6aed 1461 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1462 &seek->seek_stateid,
624322f1 1463 RD_STATE, &nf, NULL);
24bab491
AS		 1464 if (status) {
1465 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1466 return status;
1467 }
1468
1469 switch (seek->seek_whence) {
1470 case NFS4_CONTENT_DATA:
1471 whence = SEEK_DATA;
1472 break;
1473 case NFS4_CONTENT_HOLE:
1474 whence = SEEK_HOLE;
1475 break;
1476 default:
1477 status = nfserr_union_notsupp;
1478 goto out;
1479 }
1480
1481 /*
1482 * Note: This call does change file->f_pos, but nothing in NFSD
1483 * should ever file->f_pos.
1484 */
5c4583b2 1485 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
24bab491
AS		 1486 if (seek->seek_pos < 0)
1487 status = nfserrno(seek->seek_pos);
5c4583b2 1488 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
24bab491
AS		 1489 seek->seek_eof = true;
1490
1491out:
5c4583b2 1492 nfsd_file_put(nf);
24bab491
AS		 1493 return status;
1494}
1495
1da177e4
LT		 1496/* This routine never returns NFS_OK! If there are no other errors, it
1497 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1498 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1499 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1500 */
b37ad28b 1501static __be32
c954e2a5 1502_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1503 struct nfsd4_verify *verify)
1da177e4 1504{
2ebbc012 1505 __be32 *buf, *p;
1da177e4 1506 int count;
b37ad28b 1507 __be32 status;
1da177e4 1508
8837abca 1509 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1510 if (status)
1511 return status;
1512
3c8e0316
YZ		 1513 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1514 if (status)
1515 return status;
1516
1da177e4
LT		 1517 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1518 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1519 return nfserr_inval;
1520 if (verify->ve_attrlen & 3)
1521 return nfserr_inval;
1522
1523 /* count in words:
1524 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1525 */
1526 count = 4 + (verify->ve_attrlen >> 2);
1527 buf = kmalloc(count << 2, GFP_KERNEL);
1528 if (!buf)
3e772463 1529 return nfserr_jukebox;
1da177e4 1530
84822d0b 1531 p = buf;
d5184658 1532 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1533 cstate->current_fh.fh_export,
d5184658
BF		 1534 cstate->current_fh.fh_dentry,
1535 verify->ve_bmval,
406a7ea9 1536 rqstp, 0);
41ae6e71
BF		 1537 /*
1538 * If nfsd4_encode_fattr() ran out of space, assume that's because
1539 * the attributes are longer (hence different) than those given:
1540 */
84822d0b 1541 if (status == nfserr_resource)
1da177e4
LT		 1542 status = nfserr_not_same;
1543 if (status)
1544 goto out_kfree;
1545
95ec28cd
BH		 1546 /* skip bitmap */
1547 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1548 status = nfserr_not_same;
1549 if (ntohl(*p++) != verify->ve_attrlen)
1550 goto out_kfree;
1551 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1552 status = nfserr_same;
1553
1554out_kfree:
1555 kfree(buf);
1556 return status;
1557}
1558
c954e2a5
BF		 1559static __be32
1560nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1561 union nfsd4_op_u *u)
c954e2a5
BF		 1562{
1563 __be32 status;
1564
eb69853d 1565 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1566 return status == nfserr_not_same ? nfs_ok : status;
1567}
1568
1569static __be32
1570nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1571 union nfsd4_op_u *u)
c954e2a5
BF		 1572{
1573 __be32 status;
1574
eb69853d 1575 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1576 return status == nfserr_same ? nfs_ok : status;
1577}
1578
9cf514cc
CH		 1579#ifdef CONFIG_NFSD_PNFS
1580static const struct nfsd4_layout_ops *
1581nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1582{
8a4c3926 1583 if (!exp->ex_layout_types) {
9cf514cc
CH		 1584 dprintk("%s: export does not support pNFS\n", __func__);
1585 return NULL;
1586 }
1587
b550a32e
AK		 1588 if (layout_type >= LAYOUT_TYPE_MAX ||
1589 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1590 dprintk("%s: layout type %d not supported\n",
1591 __func__, layout_type);
1592 return NULL;
1593 }
1594
1595 return nfsd4_layout_ops[layout_type];
1596}
1597
1598static __be32
1599nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1600 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1601{
eb69853d 1602 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1603 const struct nfsd4_layout_ops *ops;
1604 struct nfsd4_deviceid_map *map;
1605 struct svc_export *exp;
1606 __be32 nfserr;
1607
1608 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1609 __func__,
1610 gdp->gd_layout_type,
1611 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1612 gdp->gd_maxcount);
1613
1614 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1615 if (!map) {
1616 dprintk("%s: couldn't find device ID to export mapping!\n",
1617 __func__);
1618 return nfserr_noent;
1619 }
1620
1621 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1622 if (IS_ERR(exp)) {
1623 dprintk("%s: could not find device id\n", __func__);
1624 return nfserr_noent;
1625 }
1626
1627 nfserr = nfserr_layoutunavailable;
1628 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1629 if (!ops)
1630 goto out;
1631
1632 nfserr = nfs_ok;
f99d4fbd
CH		 1633 if (gdp->gd_maxcount != 0) {
1634 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1635 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1636 }
9cf514cc
CH		 1637
1638 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1639out:
a1420384 1640 exp_put(exp);
9cf514cc
CH		 1641 return nfserr;
1642}
1643
34b1744c
BF		 1644static void
1645nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1646{
1647 kfree(u->getdeviceinfo.gd_device);
1648}
1649
9cf514cc
CH		 1650static __be32
1651nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1652 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1653{
eb69853d 1654 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1655 struct svc_fh *current_fh = &cstate->current_fh;
1656 const struct nfsd4_layout_ops *ops;
1657 struct nfs4_layout_stateid *ls;
1658 __be32 nfserr;
66282ec1 1659 int accmode = NFSD_MAY_READ_IF_EXEC;
9cf514cc
CH		 1660
1661 switch (lgp->lg_seg.iomode) {
1662 case IOMODE_READ:
66282ec1 1663 accmode |= NFSD_MAY_READ;
9cf514cc
CH		 1664 break;
1665 case IOMODE_RW:
66282ec1 1666 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
9cf514cc
CH		 1667 break;
1668 default:
1669 dprintk("%s: invalid iomode %d\n",
1670 __func__, lgp->lg_seg.iomode);
1671 nfserr = nfserr_badiomode;
1672 goto out;
1673 }
1674
1675 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1676 if (nfserr)
1677 goto out;
1678
1679 nfserr = nfserr_layoutunavailable;
1680 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1681 if (!ops)
1682 goto out;
1683
1684 /*
1685 * Verify minlength and range as per RFC5661:
1686 * o If loga_length is less than loga_minlength,
1687 * the metadata server MUST return NFS4ERR_INVAL.
1688 * o If the sum of loga_offset and loga_minlength exceeds
1689 * NFS4_UINT64_MAX, and loga_minlength is not
1690 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1691 * o If the sum of loga_offset and loga_length exceeds
1692 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1693 * the error NFS4ERR_INVAL MUST result.
1694 */
1695 nfserr = nfserr_inval;
1696 if (lgp->lg_seg.length < lgp->lg_minlength ||
1697 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1698 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1699 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1700 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1701 goto out;
1702 if (lgp->lg_seg.length == 0)
1703 goto out;
1704
1705 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1706 true, lgp->lg_layout_type, &ls);
31ef83dc 1707 if (nfserr) {
f394b62b 1708 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1709 goto out;
31ef83dc 1710 }
9cf514cc 1711
c5c707f9
CH		 1712 nfserr = nfserr_recallconflict;
1713 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1714 goto out_put_stid;
1715
2b0143b5 1716 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1717 current_fh, lgp);
1718 if (nfserr)
1719 goto out_put_stid;
1720
1721 nfserr = nfsd4_insert_layout(lgp, ls);
1722
1723out_put_stid:
cc8a5532 1724 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1725 nfs4_put_stid(&ls->ls_stid);
1726out:
1727 return nfserr;
1728}
1729
34b1744c
BF		 1730static void
1731nfsd4_layoutget_release(union nfsd4_op_u *u)
1732{
1733 kfree(u->layoutget.lg_content);
1734}
1735
9cf514cc
CH		 1736static __be32
1737nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1738 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1739{
eb69853d 1740 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1741 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1742 struct svc_fh *current_fh = &cstate->current_fh;
1743 const struct nfsd4_layout_ops *ops;
1744 loff_t new_size = lcp->lc_last_wr + 1;
1745 struct inode *inode;
1746 struct nfs4_layout_stateid *ls;
1747 __be32 nfserr;
1748
1749 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1750 if (nfserr)
1751 goto out;
1752
1753 nfserr = nfserr_layoutunavailable;
1754 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1755 if (!ops)
1756 goto out;
2b0143b5 1757 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1758
1759 nfserr = nfserr_inval;
1760 if (new_size <= seg->offset) {
1761 dprintk("pnfsd: last write before layout segment\n");
1762 goto out;
1763 }
1764 if (new_size > seg->offset + seg->length) {
1765 dprintk("pnfsd: last write beyond layout segment\n");
1766 goto out;
1767 }
1768 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1769 dprintk("pnfsd: layoutcommit beyond EOF\n");
1770 goto out;
1771 }
1772
1773 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1774 false, lcp->lc_layout_type,
1775 &ls);
1776 if (nfserr) {
f394b62b 1777 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1778 /* fixup error code as per RFC5661 */
1779 if (nfserr == nfserr_bad_stateid)
1780 nfserr = nfserr_badlayout;
1781 goto out;
1782 }
1783
cc8a5532
JL		 1784 /* LAYOUTCOMMIT does not require any serialization */
1785 mutex_unlock(&ls->ls_mutex);
1786
9cf514cc
CH		 1787 if (new_size > i_size_read(inode)) {
1788 lcp->lc_size_chg = 1;
1789 lcp->lc_newsize = new_size;
1790 } else {
1791 lcp->lc_size_chg = 0;
1792 }
1793
d8398fc1 1794 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1795 nfs4_put_stid(&ls->ls_stid);
1796out:
1797 return nfserr;
1798}
1799
1800static __be32
1801nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 1802 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1803{
eb69853d 1804 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 1805 struct svc_fh *current_fh = &cstate->current_fh;
1806 __be32 nfserr;
1807
1808 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1809 if (nfserr)
1810 goto out;
1811
1812 nfserr = nfserr_layoutunavailable;
1813 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1814 goto out;
1815
1816 switch (lrp->lr_seg.iomode) {
1817 case IOMODE_READ:
1818 case IOMODE_RW:
1819 case IOMODE_ANY:
1820 break;
1821 default:
1822 dprintk("%s: invalid iomode %d\n", __func__,
1823 lrp->lr_seg.iomode);
1824 nfserr = nfserr_inval;
1825 goto out;
1826 }
1827
1828 switch (lrp->lr_return_type) {
1829 case RETURN_FILE:
1830 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1831 break;
1832 case RETURN_FSID:
1833 case RETURN_ALL:
1834 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1835 break;
1836 default:
1837 dprintk("%s: invalid return_type %d\n", __func__,
1838 lrp->lr_return_type);
1839 nfserr = nfserr_inval;
1840 break;
1841 }
1842out:
1843 return nfserr;
1844}
1845#endif /* CONFIG_NFSD_PNFS */
1846
1da177e4
LT		 1847/*
1848 * NULL call.
1849 */
7111c66e 1850static __be32
a6beb732 1851nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 1852{
1853 return nfs_ok;
1854}
1855
e2b20950
SA		 1856static inline void nfsd4_increment_op_stats(u32 opnum)
1857{
1858 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1859 nfsdstats.nfs4_opcount[opnum]++;
1860}
1861
bb2a8b0c 1862static const struct nfsd4_operation nfsd4_ops[];
b591480b 1863
f1c7f79b 1864static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1865
f9bb94c4 1866/*
57716355 1867 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1868 *
57716355
BF		 1869 * Also note, enforced elsewhere:
1870 * - SEQUENCE other than as first op results in
1871 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1872 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1873 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1874 * - DESTROY_SESSION must be the final operation in a compound, if
1875 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1876 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1877 */
57716355 1878static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1879{
7a04cfda 1880 struct nfsd4_op *first_op = &args->ops[0];
57716355
BF		 1881
1882 /* These ordering requirements don't apply to NFSv4.0: */
1883 if (args->minorversion == 0)
1884 return nfs_ok;
1885 /* This is weird, but OK, not our problem: */
1886 if (args->opcnt == 0)
1887 return nfs_ok;
7a04cfda 1888 if (first_op->status == nfserr_op_illegal)
57716355 1889 return nfs_ok;
7a04cfda 1890 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
57716355 1891 return nfserr_op_not_in_session;
7a04cfda 1892 if (first_op->opnum == OP_SEQUENCE)
57716355 1893 return nfs_ok;
7a04cfda
BF		 1894 /*
1895 * So first_op is something allowed outside a session, like
1896 * EXCHANGE_ID; but then it has to be the only op in the
1897 * compound:
1898 */
57716355
BF		 1899 if (args->opcnt != 1)
1900 return nfserr_not_only_op;
1901 return nfs_ok;
f9bb94c4
AA		 1902}
1903
f4f9ef4a 1904const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 1905{
1906 return &nfsd4_ops[op->opnum];
1907}
1908
1091006c
BF		 1909bool nfsd4_cache_this_op(struct nfsd4_op *op)
1910{
e372ba60
BF		 1911 if (op->opnum == OP_ILLEGAL)
1912 return false;
c856694e 1913 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1914}
1915
68d93184
BF		 1916static bool need_wrongsec_check(struct svc_rqst *rqstp)
1917{
1918 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1919 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1920 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1921 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 1922 const struct nfsd4_operation *thisd = OPDESC(this);
1923 const struct nfsd4_operation *nextd;
68d93184 1924
68d93184
BF		 1925 /*
1926 * Most ops check wronsec on our own; only the putfh-like ops
1927 * have special rules.
1928 */
1929 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1930 return false;
1931 /*
1932 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1933 * put-filehandle operation if we're not going to use the
1934 * result:
1935 */
1936 if (argp->opcnt == resp->opcnt)
1937 return false;
51904b08
BF		 1938 if (next->opnum == OP_ILLEGAL)
1939 return false;
68d93184
BF		 1940 nextd = OPDESC(next);
1941 /*
1942 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1943 * errors themselves as necessary; others should check for them
1944 * now:
1945 */
1946 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1947}
1948
2d124dfa
BF		 1949static void svcxdr_init_encode(struct svc_rqst *rqstp,
1950 struct nfsd4_compoundres *resp)
1951{
1952 struct xdr_stream *xdr = &resp->xdr;
1953 struct xdr_buf *buf = &rqstp->rq_res;
1954 struct kvec *head = buf->head;
1955
1956 xdr->buf = buf;
ddd1ea56 1957 xdr->iov = head;
2d124dfa 1958 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1959 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1960 /* Tail and page_len should be zero at this point: */
1961 buf->len = buf->head[0].iov_len;
2825a7f9 1962 xdr->scratch.iov_len = 0;
05638dc7 1963 xdr->page_ptr = buf->pages - 1;
2825a7f9 1964 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1965 - rqstp->rq_auth_slack;
2d124dfa
BF		 1966}
1967
b9e8638e
OK		 1968#ifdef CONFIG_NFSD_V4_2_INTER_SSC
1969static void
1970check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
1971{
1972 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
1973 struct nfsd4_copy *copy;
1974 struct nfsd4_putfh *putfh;
1975 int i;
1976
1977 /* traverse all operation and if it's a COPY compound, mark the
1978 * source filehandle to skip verification
1979 */
1980 for (i = 0; i < args->opcnt; i++) {
1981 op = &args->ops[i];
1982 if (op->opnum == OP_PUTFH)
1983 current_op = op;
1984 else if (op->opnum == OP_SAVEFH)
1985 saved_op = current_op;
1986 else if (op->opnum == OP_RESTOREFH)
1987 current_op = saved_op;
1988 else if (op->opnum == OP_COPY) {
1989 copy = (struct nfsd4_copy *)&op->u;
1990 if (!saved_op) {
1991 op->status = nfserr_nofilehandle;
1992 return;
1993 }
1994 putfh = (struct nfsd4_putfh *)&saved_op->u;
1995 if (!copy->cp_intra)
1996 putfh->no_verify = true;
1997 }
1998 }
1999}
2000#else
2001static void
2002check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2003{
2004}
2005#endif
2006
1da177e4
LT		 2007/*
2008 * COMPOUND call.
2009 */
7111c66e 2010static __be32
a6beb732 2011nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 2012{
a6beb732
CH		 2013 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2014 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 2015 struct nfsd4_op *op;
e354d571 2016 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 2017 struct svc_fh *current_fh = &cstate->current_fh;
2018 struct svc_fh *save_fh = &cstate->save_fh;
e333f3bb 2019 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
b37ad28b 2020 __be32 status;
1da177e4 2021
2d124dfa 2022 svcxdr_init_encode(rqstp, resp);
4aea24b2 2023 resp->tagp = resp->xdr.p;
1da177e4 2024 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 2025 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 2026 resp->taglen = args->taglen;
2027 resp->tag = args->tag;
1da177e4 2028 resp->rqstp = rqstp;
4daeed25 2029 cstate->minorversion = args->minorversion;
4daeed25
KM		 2030 fh_init(current_fh, NFS4_FHSIZE);
2031 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 2032 /*
2033 * Don't use the deferral mechanism for NFSv4; compounds make it
2034 * too hard to avoid non-idempotency problems.
2035 */
30660e04 2036 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 2037
2038 /*
2039 * According to RFC3010, this takes precedence over all other errors.
2040 */
2041 status = nfserr_minor_vers_mismatch;
e333f3bb 2042 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
1da177e4 2043 goto out;
0078117c
BF		 2044 status = nfserr_resource;
2045 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2046 goto out;
1da177e4 2047
57716355
BF		 2048 status = nfs41_check_op_ordering(args);
2049 if (status) {
f9bb94c4 2050 op = &args->ops[0];
57716355 2051 op->status = status;
5b7b15ae 2052 resp->opcnt = 1;
f9bb94c4
AA		 2053 goto encode_op;
2054 }
b9e8638e 2055 check_if_stalefh_allowed(args);
f9bb94c4 2056
fff4080b 2057 trace_nfsd_compound(rqstp, args->opcnt);
1da177e4
LT		 2058 while (!status && resp->opcnt < args->opcnt) {
2059 op = &args->ops[resp->opcnt++];
2060
2061 /*
2062 * The XDR decode routines may have pre-set op->status;
2063 * for example, if there is a miscellaneous XDR error
2064 * it will be set to nfserr_bad_xdr.
2065 */
9d313b17
BF		 2066 if (op->status) {
2067 if (op->opnum == OP_OPEN)
2068 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 2069 goto encode_op;
9d313b17 2070 }
b9e8638e
OK		 2071 if (!current_fh->fh_dentry &&
2072 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
f4f9ef4a 2073 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 2074 op->status = nfserr_nofilehandle;
2075 goto encode_op;
2076 }
b9e8638e
OK		 2077 } else if (current_fh->fh_export &&
2078 current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 2079 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 2080 op->status = nfserr_moved;
1da177e4
LT		 2081 goto encode_op;
2082 }
b591480b 2083
2336745e
KM		 2084 fh_clear_wcc(current_fh);
2085
58e7b33a 2086 /* If op is non-idempotent */
f4f9ef4a 2087 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 2088 /*
a8095f7e
BF		 2089 * Don't execute this op if we couldn't encode a
2090 * succesful reply:
2091 */
f4f9ef4a 2092 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 2093 /*
2094 * Plus if there's another operation, make sure
4c69d585
BF		 2095 * we'll have space to at least encode an error:
2096 */
2097 if (resp->opcnt < args->opcnt)
2098 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 2099 op->status = nfsd4_check_resp_size(resp, plen);
2100 }
2101
2102 if (op->status)
2103 goto encode_op;
2104
f4f9ef4a
BF		 2105 if (op->opdesc->op_get_currentstateid)
2106 op->opdesc->op_get_currentstateid(cstate, &op->u);
2107 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 2108
9a307403
BF		 2109 /* Only from SEQUENCE */
2110 if (cstate->status == nfserr_replay_cache) {
2111 dprintk("%s NFS4.1 replay from cache\n", __func__);
2112 status = op->status;
2113 goto out;
2114 }
8b70484c 2115 if (!op->status) {
f4f9ef4a
BF		 2116 if (op->opdesc->op_set_currentstateid)
2117 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 2118
f4f9ef4a 2119 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 2120 clear_current_stateid(cstate);
8b70484c
TM		 2121
2122 if (need_wrongsec_check(rqstp))
4daeed25 2123 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 2124 }
1da177e4 2125encode_op:
a90b061c 2126 if (op->status == nfserr_replay_me) {
a4f1706a 2127 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 2128 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 2129 status = op->status = op->replay->rp_status;
2130 } else {
2131 nfsd4_encode_operation(resp, op);
2132 status = op->status;
2133 }
0407717d 2134
fff4080b
CL		 2135 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2136 nfsd4_op_name(op->opnum));
0407717d 2137
58fb12e6 2138 nfsd4_cstate_clear_replay(cstate);
e2b20950 2139 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 2140 }
2141
4daeed25
KM		 2142 cstate->status = status;
2143 fh_put(current_fh);
2144 fh_put(save_fh);
2145 BUG_ON(cstate->replay_owner);
1da177e4 2146out:
2f425878 2147 /* Reset deferral mechanism for RPC deferrals */
30660e04 2148 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 2149 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 2150 return status;
2151}
2152
58e7b33a
MJ		 2153#define op_encode_hdr_size (2)
2154#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2155#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2156#define op_encode_change_info_maxsz (5)
2157#define nfs4_fattr_bitmap_maxsz (4)
2158
8c7424cf
BF		 2159/* We'll fall back on returning no lockowner if run out of space: */
2160#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 2161#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2162
2163#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2164
2165#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2166#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2167 op_encode_ace_maxsz)
2168
2169#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2170
2171static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2172{
2173 return (op_encode_hdr_size) * sizeof(__be32);
2174}
2175
2176static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2177{
2178 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2179}
2180
2282cd2c
KM		 2181static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2182{
2183 /* ac_supported, ac_resp_access */
2184 return (op_encode_hdr_size + 2)* sizeof(__be32);
2185}
2186
58e7b33a
MJ		 2187static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2188{
2189 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2190}
2191
2192static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2193{
2194 return (op_encode_hdr_size + op_encode_change_info_maxsz
2195 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2196}
2197
b86cef60
BF		 2198/*
2199 * Note since this is an idempotent operation we won't insist on failing
2200 * the op prematurely if the estimate is too large. We may turn off splice
2201 * reads unnecessarily.
2202 */
2203static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2204 struct nfsd4_op *op)
2205{
2206 u32 *bmap = op->u.getattr.ga_bmval;
2207 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2208 u32 ret = 0;
2209
2210 if (bmap0 & FATTR4_WORD0_ACL)
2211 return svc_max_payload(rqstp);
2212 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2213 return svc_max_payload(rqstp);
2214
2215 if (bmap1 & FATTR4_WORD1_OWNER) {
2216 ret += IDMAP_NAMESZ + 4;
2217 bmap1 &= ~FATTR4_WORD1_OWNER;
2218 }
2219 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2220 ret += IDMAP_NAMESZ + 4;
2221 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2222 }
2223 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2224 ret += NFS4_FHSIZE + 4;
2225 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2226 }
2227 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 2228 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 2229 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2230 }
2231 /*
2232 * Largest of remaining attributes are 16 bytes (e.g.,
2233 * supported_attributes)
2234 */
2235 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2236 /* bitmask, length */
2237 ret += 20;
2238 return ret;
2239}
2240
2282cd2c
KM		 2241static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2242{
2243 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2244}
2245
58e7b33a
MJ		 2246static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2247{
2248 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2249 * sizeof(__be32);
2250}
2251
2252static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2253{
2254 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2255 * sizeof(__be32);
2256}
2257
2258static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2259{
2260 return (op_encode_hdr_size + op_encode_stateid_maxsz
2261 + op_encode_change_info_maxsz + 1
2262 + nfs4_fattr_bitmap_maxsz
2263 + op_encode_delegation_maxsz) * sizeof(__be32);
2264}
2265
2266static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2267{
2268 u32 maxcount = 0, rlen = 0;
2269
2270 maxcount = svc_max_payload(rqstp);
3c7aa15d 2271 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 2272
622f560e 2273 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2274}
2275
2276static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2277{
3c7aa15d 2278 u32 maxcount = 0, rlen = 0;
58e7b33a 2279
3c7aa15d
KM		 2280 maxcount = svc_max_payload(rqstp);
2281 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 2282
561f0ed4
BF		 2283 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2284 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2285}
2286
2282cd2c
KM		 2287static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2288{
2289 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2290}
2291
58e7b33a
MJ		 2292static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2293{
2294 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2295 * sizeof(__be32);
2296}
2297
2298static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2299{
2300 return (op_encode_hdr_size + op_encode_change_info_maxsz
2301 + op_encode_change_info_maxsz) * sizeof(__be32);
2302}
2303
ccae70a9
BF		 2304static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2305 struct nfsd4_op *op)
2306{
d1d84c96
BF		 2307 return (op_encode_hdr_size
2308 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 2309}
2310
2282cd2c
KM		 2311static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2312{
2313 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2314 * sizeof(__be32);
2315}
2316
58e7b33a
MJ		 2317static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2318{
2319 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2320}
2321
2282cd2c
KM		 2322static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2323{
2324 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2325 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2326}
2327
58e7b33a
MJ		 2328static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2329{
480efaee
BF		 2330 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2331 sizeof(__be32);
58e7b33a
MJ		 2332}
2333
2334static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2335{
f34e432b 2336 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2337}
2338
2339static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2340{
2341 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2342 1 + 1 + /* eir_flags, spr_how */\
2343 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2344 2 + /*eir_server_owner.so_minor_id */\
2345 /* eir_server_owner.so_major_id<> */\
2346 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2347 /* eir_server_scope<> */\
2348 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2349 1 + /* eir_server_impl_id array length */\
2350 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2351}
2352
2353static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2354{
2355 return (op_encode_hdr_size + \
2356 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2357 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2358}
2359
2360static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2361{
2362 return (op_encode_hdr_size + \
2363 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2364 2 + /* csr_sequence, csr_flags */\
2365 op_encode_channel_attrs_maxsz + \
2366 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2367}
2368
29ae7f9d
AS		 2369static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2370{
2371 return (op_encode_hdr_size +
2372 1 /* wr_callback */ +
2373 op_encode_stateid_maxsz /* wr_callback */ +
2374 2 /* wr_count */ +
2375 1 /* wr_committed */ +
2376 op_encode_verifier_maxsz +
2377 1 /* cr_consecutive */ +
2378 1 /* cr_synchronous */) * sizeof(__be32);
2379}
2380
6308bc98
OK		 2381static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2382 struct nfsd4_op *op)
2383{
2384 return (op_encode_hdr_size +
2385 2 /* osr_count */ +
2386 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2387}
2388
51911868
OK		 2389static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2390 struct nfsd4_op *op)
2391{
2392 return (op_encode_hdr_size +
2393 3 /* cnr_lease_time */ +
2394 1 /* We support one cnr_source_server */ +
2395 1 /* cnr_stateid seq */ +
2396 op_encode_stateid_maxsz /* cnr_stateid */ +
2397 1 /* num cnr_source_server*/ +
2398 1 /* nl4_type */ +
2399 1 /* nl4 size */ +
2400 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2401 * sizeof(__be32);
2402}
2403
9cf514cc 2404#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2405static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2406{
2407 u32 maxcount = 0, rlen = 0;
2408
2409 maxcount = svc_max_payload(rqstp);
2410 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2411
2412 return (op_encode_hdr_size +
2413 1 /* gd_layout_type*/ +
2414 XDR_QUADLEN(rlen) +
2415 2 /* gd_notify_types */) * sizeof(__be32);
2416}
2417
9cf514cc
CH		 2418/*
2419 * At this stage we don't really know what layout driver will handle the request,
2420 * so we need to define an arbitrary upper bound here.
2421 */
2422#define MAX_LAYOUT_SIZE 128
2423static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2424{
2425 return (op_encode_hdr_size +
2426 1 /* logr_return_on_close */ +
2427 op_encode_stateid_maxsz +
2428 1 /* nr of layouts */ +
2429 MAX_LAYOUT_SIZE) * sizeof(__be32);
2430}
2431
2432static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2433{
2434 return (op_encode_hdr_size +
2435 1 /* locr_newsize */ +
2436 2 /* ns_size */) * sizeof(__be32);
2437}
2438
2439static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2440{
2441 return (op_encode_hdr_size +
2442 1 /* lrs_stateid */ +
2443 op_encode_stateid_maxsz) * sizeof(__be32);
2444}
2445#endif /* CONFIG_NFSD_PNFS */
2446
2282cd2c
KM		 2447
2448static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2449{
2450 return (op_encode_hdr_size + 3) * sizeof(__be32);
2451}
2452
bb2a8b0c 2453static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2454 [OP_ACCESS] = {
eb69853d 2455 .op_func = nfsd4_access,
b001a1b6 2456 .op_name = "OP_ACCESS",
1c122638 2457 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2458 },
2459 [OP_CLOSE] = {
eb69853d 2460 .op_func = nfsd4_close,
58e7b33a 2461 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2462 .op_name = "OP_CLOSE",
1c122638 2463 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2464 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2465 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2466 },
2467 [OP_COMMIT] = {
eb69853d 2468 .op_func = nfsd4_commit,
58e7b33a 2469 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2470 .op_name = "OP_COMMIT",
1c122638 2471 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2472 },
2473 [OP_CREATE] = {
eb69853d 2474 .op_func = nfsd4_create,
d1471053 2475 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2476 .op_name = "OP_CREATE",
1c122638 2477 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2478 },
2479 [OP_DELEGRETURN] = {
eb69853d 2480 .op_func = nfsd4_delegreturn,
58e7b33a 2481 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2482 .op_name = "OP_DELEGRETURN",
58e7b33a 2483 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2484 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2485 },
2486 [OP_GETATTR] = {
eb69853d 2487 .op_func = nfsd4_getattr,
eeac294e 2488 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2489 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2490 .op_name = "OP_GETATTR",
b591480b
BF		 2491 },
2492 [OP_GETFH] = {
eb69853d 2493 .op_func = nfsd4_getfh,
b001a1b6 2494 .op_name = "OP_GETFH",
1c122638 2495 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2496 },
2497 [OP_LINK] = {
eb69853d 2498 .op_func = nfsd4_link,
c856694e
BF		 2499 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2500 | OP_CACHEME,
b001a1b6 2501 .op_name = "OP_LINK",
1c122638 2502 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2503 },
2504 [OP_LOCK] = {
eb69853d 2505 .op_func = nfsd4_lock,
b7571e4c
BF		 2506 .op_flags = OP_MODIFIES_SOMETHING |
2507 OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2508 .op_name = "OP_LOCK",
1c122638 2509 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2510 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2511 },
2512 [OP_LOCKT] = {
eb69853d 2513 .op_func = nfsd4_lockt,
b7571e4c 2514 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2515 .op_name = "OP_LOCKT",
1c122638 2516 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2517 },
2518 [OP_LOCKU] = {
eb69853d 2519 .op_func = nfsd4_locku,
58e7b33a 2520 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2521 .op_name = "OP_LOCKU",
1c122638 2522 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2523 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2524 },
2525 [OP_LOOKUP] = {
eb69853d 2526 .op_func = nfsd4_lookup,
d1471053 2527 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2528 .op_name = "OP_LOOKUP",
1c122638 2529 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2530 },
2531 [OP_LOOKUPP] = {
eb69853d 2532 .op_func = nfsd4_lookupp,
d1471053 2533 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2534 .op_name = "OP_LOOKUPP",
1c122638 2535 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2536 },
2537 [OP_NVERIFY] = {
eb69853d 2538 .op_func = nfsd4_nverify,
b001a1b6 2539 .op_name = "OP_NVERIFY",
1c122638 2540 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2541 },
2542 [OP_OPEN] = {
eb69853d 2543 .op_func = nfsd4_open,
58e7b33a 2544 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2545 .op_name = "OP_OPEN",
1c122638 2546 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2547 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2548 },
2549 [OP_OPEN_CONFIRM] = {
eb69853d 2550 .op_func = nfsd4_open_confirm,
58e7b33a 2551 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2552 .op_name = "OP_OPEN_CONFIRM",
1c122638 2553 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2554 },
2555 [OP_OPEN_DOWNGRADE] = {
eb69853d 2556 .op_func = nfsd4_open_downgrade,
58e7b33a 2557 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2558 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2559 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2560 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2561 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2562 },
2563 [OP_PUTFH] = {
eb69853d 2564 .op_func = nfsd4_putfh,
68d93184 2565 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2566 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2567 .op_name = "OP_PUTFH",
1c122638 2568 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2569 },
eeac294e 2570 [OP_PUTPUBFH] = {
eb69853d 2571 .op_func = nfsd4_putrootfh,
68d93184 2572 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2573 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2574 .op_name = "OP_PUTPUBFH",
1c122638 2575 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2576 },
b591480b 2577 [OP_PUTROOTFH] = {
eb69853d 2578 .op_func = nfsd4_putrootfh,
68d93184 2579 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2580 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2581 .op_name = "OP_PUTROOTFH",
1c122638 2582 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2583 },
2584 [OP_READ] = {
eb69853d 2585 .op_func = nfsd4_read,
34b1744c 2586 .op_release = nfsd4_read_release,
b001a1b6 2587 .op_name = "OP_READ",
1c122638 2588 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2589 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2590 },
2591 [OP_READDIR] = {
eb69853d 2592 .op_func = nfsd4_readdir,
b001a1b6 2593 .op_name = "OP_READDIR",
1c122638 2594 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2595 },
2596 [OP_READLINK] = {
eb69853d 2597 .op_func = nfsd4_readlink,
b001a1b6 2598 .op_name = "OP_READLINK",
1c122638 2599 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2600 },
2601 [OP_REMOVE] = {
eb69853d 2602 .op_func = nfsd4_remove,
c856694e 2603 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2604 .op_name = "OP_REMOVE",
1c122638 2605 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2606 },
2607 [OP_RENAME] = {
eb69853d 2608 .op_func = nfsd4_rename,
c856694e 2609 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2610 .op_name = "OP_RENAME",
1c122638 2611 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2612 },
2613 [OP_RENEW] = {
eb69853d 2614 .op_func = nfsd4_renew,
58e7b33a
MJ		 2615 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2616 | OP_MODIFIES_SOMETHING,
b001a1b6 2617 .op_name = "OP_RENEW",
1c122638 2618 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2619
b591480b
BF		 2620 },
2621 [OP_RESTOREFH] = {
eb69853d 2622 .op_func = nfsd4_restorefh,
68d93184 2623 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2624 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2625 .op_name = "OP_RESTOREFH",
1c122638 2626 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2627 },
2628 [OP_SAVEFH] = {
eb69853d 2629 .op_func = nfsd4_savefh,
58e7b33a 2630 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2631 .op_name = "OP_SAVEFH",
1c122638 2632 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2633 },
dcb488a3 2634 [OP_SECINFO] = {
eb69853d 2635 .op_func = nfsd4_secinfo,
34b1744c 2636 .op_release = nfsd4_secinfo_release,
68d93184 2637 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2638 .op_name = "OP_SECINFO",
1c122638 2639 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2640 },
b591480b 2641 [OP_SETATTR] = {
eb69853d 2642 .op_func = nfsd4_setattr,
b001a1b6 2643 .op_name = "OP_SETATTR",
b7571e4c
BF		 2644 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2645 | OP_NONTRIVIAL_ERROR_ENCODE,
1c122638 2646 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 2647 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 2648 },
2649 [OP_SETCLIENTID] = {
eb69853d 2650 .op_func = nfsd4_setclientid,
58e7b33a 2651 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
b7571e4c
BF		 2652 | OP_MODIFIES_SOMETHING | OP_CACHEME
2653 | OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2654 .op_name = "OP_SETCLIENTID",
1c122638 2655 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 2656 },
2657 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 2658 .op_func = nfsd4_setclientid_confirm,
58e7b33a 2659 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2660 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2661 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 2662 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2663 },
2664 [OP_VERIFY] = {
eb69853d 2665 .op_func = nfsd4_verify,
b001a1b6 2666 .op_name = "OP_VERIFY",
1c122638 2667 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2668 },
2669 [OP_WRITE] = {
eb69853d 2670 .op_func = nfsd4_write,
c856694e 2671 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2672 .op_name = "OP_WRITE",
1c122638 2673 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 2674 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 2675 },
2676 [OP_RELEASE_LOCKOWNER] = {
eb69853d 2677 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 2678 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2679 | OP_MODIFIES_SOMETHING,
b001a1b6 2680 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 2681 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2682 },
069b6ad4
AA		 2683
2684 /* NFSv4.1 operations */
2685 [OP_EXCHANGE_ID] = {
eb69853d 2686 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 2687 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2688 | OP_MODIFIES_SOMETHING,
069b6ad4 2689 .op_name = "OP_EXCHANGE_ID",
1c122638 2690 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 2691 },
cb73a9f4 2692 [OP_BACKCHANNEL_CTL] = {
eb69853d 2693 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 2694 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2695 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 2696 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 2697 },
1d1bc8f2 2698 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 2699 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2700 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2701 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2702 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 2703 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2704 },
069b6ad4 2705 [OP_CREATE_SESSION] = {
eb69853d 2706 .op_func = nfsd4_create_session,
58e7b33a
MJ		 2707 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2708 | OP_MODIFIES_SOMETHING,
069b6ad4 2709 .op_name = "OP_CREATE_SESSION",
1c122638 2710 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 2711 },
2712 [OP_DESTROY_SESSION] = {
eb69853d 2713 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 2714 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2715 | OP_MODIFIES_SOMETHING,
069b6ad4 2716 .op_name = "OP_DESTROY_SESSION",
1c122638 2717 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 2718 },
2719 [OP_SEQUENCE] = {
eb69853d 2720 .op_func = nfsd4_sequence,
f9bb94c4 2721 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2722 .op_name = "OP_SEQUENCE",
1c122638 2723 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 2724 },
094b5d74 2725 [OP_DESTROY_CLIENTID] = {
eb69853d 2726 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 2727 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2728 | OP_MODIFIES_SOMETHING,
094b5d74 2729 .op_name = "OP_DESTROY_CLIENTID",
1c122638 2730 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 2731 },
4dc6ec00 2732 [OP_RECLAIM_COMPLETE] = {
eb69853d 2733 .op_func = nfsd4_reclaim_complete,
58e7b33a 2734 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2735 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 2736 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 2737 },
04f4ad16 2738 [OP_SECINFO_NO_NAME] = {
eb69853d 2739 .op_func = nfsd4_secinfo_no_name,
ec572b9e 2740 .op_release = nfsd4_secinfo_no_name_release,
68d93184 2741 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2742 .op_name = "OP_SECINFO_NO_NAME",
1c122638 2743 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 2744 },
17456804 2745 [OP_TEST_STATEID] = {
eb69853d 2746 .op_func = nfsd4_test_stateid,
17456804
BS		 2747 .op_flags = ALLOWED_WITHOUT_FH,
2748 .op_name = "OP_TEST_STATEID",
1c122638 2749 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 2750 },
e1ca12df 2751 [OP_FREE_STATEID] = {
eb69853d 2752 .op_func = nfsd4_free_stateid,
58e7b33a 2753 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2754 .op_name = "OP_FREE_STATEID",
57832e7b 2755 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 2756 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 2757 },
9cf514cc
CH		 2758#ifdef CONFIG_NFSD_PNFS
2759 [OP_GETDEVICEINFO] = {
eb69853d 2760 .op_func = nfsd4_getdeviceinfo,
34b1744c 2761 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 2762 .op_flags = ALLOWED_WITHOUT_FH,
2763 .op_name = "OP_GETDEVICEINFO",
1c122638 2764 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 2765 },
2766 [OP_LAYOUTGET] = {
eb69853d 2767 .op_func = nfsd4_layoutget,
34b1744c 2768 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 2769 .op_flags = OP_MODIFIES_SOMETHING,
2770 .op_name = "OP_LAYOUTGET",
1c122638 2771 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 2772 },
2773 [OP_LAYOUTCOMMIT] = {
eb69853d 2774 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 2775 .op_flags = OP_MODIFIES_SOMETHING,
2776 .op_name = "OP_LAYOUTCOMMIT",
1c122638 2777 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 2778 },
2779 [OP_LAYOUTRETURN] = {
eb69853d 2780 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 2781 .op_flags = OP_MODIFIES_SOMETHING,
2782 .op_name = "OP_LAYOUTRETURN",
1c122638 2783 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 2784 },
2785#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2786
2787 /* NFSv4.2 operations */
95d871f0 2788 [OP_ALLOCATE] = {
eb69853d 2789 .op_func = nfsd4_allocate,
03b31f48 2790 .op_flags = OP_MODIFIES_SOMETHING,
95d871f0 2791 .op_name = "OP_ALLOCATE",
1c122638 2792 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 2793 },
b0cb9085 2794 [OP_DEALLOCATE] = {
eb69853d 2795 .op_func = nfsd4_deallocate,
03b31f48 2796 .op_flags = OP_MODIFIES_SOMETHING,
b0cb9085 2797 .op_name = "OP_DEALLOCATE",
1c122638 2798 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 2799 },
ffa0160a 2800 [OP_CLONE] = {
eb69853d 2801 .op_func = nfsd4_clone,
03b31f48 2802 .op_flags = OP_MODIFIES_SOMETHING,
ffa0160a 2803 .op_name = "OP_CLONE",
1c122638 2804 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 2805 },
29ae7f9d 2806 [OP_COPY] = {
eb69853d 2807 .op_func = nfsd4_copy,
03b31f48 2808 .op_flags = OP_MODIFIES_SOMETHING,
29ae7f9d 2809 .op_name = "OP_COPY",
1c122638 2810 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 2811 },
24bab491 2812 [OP_SEEK] = {
eb69853d 2813 .op_func = nfsd4_seek,
24bab491 2814 .op_name = "OP_SEEK",
1c122638 2815 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 2816 },
6308bc98
OK		 2817 [OP_OFFLOAD_STATUS] = {
2818 .op_func = nfsd4_offload_status,
2819 .op_name = "OP_OFFLOAD_STATUS",
2820 .op_rsize_bop = nfsd4_offload_status_rsize,
2821 },
885e2bf3
OK		 2822 [OP_OFFLOAD_CANCEL] = {
2823 .op_func = nfsd4_offload_cancel,
2824 .op_flags = OP_MODIFIES_SOMETHING,
2825 .op_name = "OP_OFFLOAD_CANCEL",
2826 .op_rsize_bop = nfsd4_only_status_rsize,
2827 },
51911868
OK		 2828 [OP_COPY_NOTIFY] = {
2829 .op_func = nfsd4_copy_notify,
2830 .op_flags = OP_MODIFIES_SOMETHING,
2831 .op_name = "OP_COPY_NOTIFY",
2832 .op_rsize_bop = nfsd4_copy_notify_rsize,
2833 },
b591480b
BF		 2834};
2835
ed941643
AE		 2836/**
2837 * nfsd4_spo_must_allow - Determine if the compound op contains an
2838 * operation that is allowed to be sent with machine credentials
2839 *
2840 * @rqstp: a pointer to the struct svc_rqst
2841 *
2842 * Checks to see if the compound contains a spo_must_allow op
2843 * and confirms that it was sent with the proper machine creds.
2844 */
2845
2846bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2847{
2848 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2849 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2850 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2851 struct nfsd4_compound_state *cstate = &resp->cstate;
2852 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2853 u32 opiter;
2854
2855 if (!cstate->minorversion)
2856 return false;
2857
2858 if (cstate->spo_must_allowed == true)
2859 return true;
2860
2861 opiter = resp->opcnt;
2862 while (opiter < argp->opcnt) {
2863 this = &argp->ops[opiter++];
2864 if (test_bit(this->opnum, allow->u.longs) &&
2865 cstate->clp->cl_mach_cred &&
2866 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2867 cstate->spo_must_allowed = true;
2868 return true;
2869 }
2870 }
2871 cstate->spo_must_allowed = false;
2872 return false;
2873}
2874
4f0cefbf
BF		 2875int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2876{
05b7278d 2877 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 2878 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 2879
2880 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2881 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 2882}
2883
07d1f802
BF		 2884void warn_on_nonidempotent_op(struct nfsd4_op *op)
2885{
2886 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2887 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2888 op->opnum, nfsd4_op_name(op->opnum));
2889 WARN_ON_ONCE(1);
2890 }
2891}
2892
f1c7f79b 2893static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2894{
2895 if (opnum < ARRAY_SIZE(nfsd4_ops))
2896 return nfsd4_ops[opnum].op_name;
2897 return "unknown_operation";
2898}
2899
1da177e4 2900#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2901struct nfsd4_voidargs { int dummy; };
2902
860bda29 2903static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 2904 [NFSPROC4_NULL] = {
f7235b6b 2905 .pc_func = nfsd4_proc_null,
63f8de37 2906 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 2907 .pc_argsize = sizeof(struct nfsd4_voidargs),
2908 .pc_ressize = sizeof(struct nfsd4_voidres),
2909 .pc_cachetype = RC_NOCACHE,
2910 .pc_xdrressize = 1,
2911 },
2912 [NFSPROC4_COMPOUND] = {
f7235b6b 2913 .pc_func = nfsd4_proc_compound,
026fec7e 2914 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 2915 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 2916 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2917 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2918 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2919 .pc_cachetype = RC_NOCACHE,
2920 .pc_xdrressize = NFSD_BUFSIZE/4,
2921 },
1da177e4
LT		 2922};
2923
7fd38af9 2924static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 2925const struct svc_version nfsd_version4 = {
5283b03e
JL		 2926 .vs_vers = 4,
2927 .vs_nproc = 2,
2928 .vs_proc = nfsd_procedures4,
7fd38af9 2929 .vs_count = nfsd_count3,
5283b03e
JL		 2930 .vs_dispatch = nfsd_dispatch,
2931 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2932 .vs_rpcb_optnl = true,
2933 .vs_need_cong_ctrl = true,
1da177e4
LT		 2934};
2935
2936/*
2937 * Local variables:
2938 * c-basic-offset: 8
2939 * End:
2940 */
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