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nfsd: include linux/nfs4.h in export.h
[deliverable/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 <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
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 */
7e06b7f9 35#include <linux/file.h>
b0cb9085 36#include <linux/falloc.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38
58e7b33a 39#include "idmap.h"
9a74af21
BH		 40#include "cache.h"
41#include "xdr4.h"
0a3adade 42#include "vfs.h"
8b70484c 43#include "current_stateid.h"
3320fef1 44#include "netns.h"
4ac7249e 45#include "acl.h"
9cf514cc 46#include "pnfs.h"
31ef83dc 47#include "trace.h"
1da177e4 48
18032ca0
DQ		 49#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50#include <linux/security.h>
51
52static inline void
53nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
54{
2b0143b5 55 struct inode *inode = d_inode(resfh->fh_dentry);
18032ca0
DQ		 56 int status;
57
58 mutex_lock(&inode->i_mutex);
59 status = security_inode_setsecctx(resfh->fh_dentry,
60 label->data, label->len);
61 mutex_unlock(&inode->i_mutex);
62
63 if (status)
64 /*
65 * XXX: We should really fail the whole open, but we may
66 * already have created a new file, so it may be too
67 * late. For now this seems the least of evils:
68 */
69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
70
71 return;
72}
73#else
74static inline void
75nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
76{ }
77#endif
78
1da177e4
LT		 79#define NFSDDBG_FACILITY NFSDDBG_PROC
80
3c8e0316
YZ		 81static u32 nfsd_attrmask[] = {
82 NFSD_WRITEABLE_ATTRS_WORD0,
83 NFSD_WRITEABLE_ATTRS_WORD1,
84 NFSD_WRITEABLE_ATTRS_WORD2
85};
86
87static u32 nfsd41_ex_attrmask[] = {
88 NFSD_SUPPATTR_EXCLCREAT_WORD0,
89 NFSD_SUPPATTR_EXCLCREAT_WORD1,
90 NFSD_SUPPATTR_EXCLCREAT_WORD2
91};
92
93static __be32
94check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
95 u32 *bmval, u32 *writable)
96{
97 struct dentry *dentry = cstate->current_fh.fh_dentry;
3c8e0316
YZ		 98
99 /*
100 * Check about attributes are supported by the NFSv4 server or not.
101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP.
102 */
103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) ||
104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) ||
105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion)))
106 return nfserr_attrnotsupp;
107
108 /*
a06b1261 109 * Check FATTR4_WORD0_ACL can be supported
3c8e0316
YZ		 110 * in current environment or not.
111 */
112 if (bmval[0] & FATTR4_WORD0_ACL) {
2b0143b5 113 if (!IS_POSIXACL(d_inode(dentry)))
3c8e0316
YZ		 114 return nfserr_attrnotsupp;
115 }
3c8e0316
YZ		 116
117 /*
118 * According to spec, read-only attributes return ERR_INVAL.
119 */
120 if (writable) {
121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) ||
122 (bmval[2] & ~writable[2]))
123 return nfserr_inval;
124 }
125
126 return nfs_ok;
127}
128
129static __be32
130nfsd4_check_open_attributes(struct svc_rqst *rqstp,
131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
132{
133 __be32 status = nfs_ok;
134
135 if (open->op_create == NFS4_OPEN_CREATE) {
136 if (open->op_createmode == NFS4_CREATE_UNCHECKED
137 || open->op_createmode == NFS4_CREATE_GUARDED)
138 status = check_attr_support(rqstp, cstate,
139 open->op_bmval, nfsd_attrmask);
140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
141 status = check_attr_support(rqstp, cstate,
142 open->op_bmval, nfsd41_ex_attrmask);
143 }
144
145 return status;
146}
147
9208faf2
YZ		 148static int
149is_create_with_attrs(struct nfsd4_open *open)
150{
151 return open->op_create == NFS4_OPEN_CREATE
152 && (open->op_createmode == NFS4_CREATE_UNCHECKED
153 || open->op_createmode == NFS4_CREATE_GUARDED
154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
155}
156
157/*
158 * if error occurs when setting the acl, just clear the acl bit
159 * in the returned attr bitmap.
160 */
161static void
162do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
163 struct nfs4_acl *acl, u32 *bmval)
164{
165 __be32 status;
166
167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
168 if (status)
169 /*
170 * We should probably fail the whole open at this point,
171 * but we've already created the file, so it's too late;
172 * So this seems the least of evils:
173 */
174 bmval[0] &= ~FATTR4_WORD0_ACL;
175}
176
1da177e4
LT		 177static inline void
178fh_dup2(struct svc_fh *dst, struct svc_fh *src)
179{
180 fh_put(dst);
181 dget(src->fh_dentry);
182 if (src->fh_export)
bf18f163 183 exp_get(src->fh_export);
1da177e4
LT		 184 *dst = *src;
185}
186
b37ad28b 187static __be32
dc730e17 188do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
1da177e4 189{
b37ad28b 190 __be32 status;
1da177e4
LT		 191
192 if (open->op_truncate &&
193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
194 return nfserr_inval;
195
a043226b
BF		 196 accmode |= NFSD_MAY_READ_IF_EXEC;
197
1da177e4 198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
8837abca 199 accmode |= NFSD_MAY_READ;
9801d8a3 200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
8837abca 201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
57ecb34f 202 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
8837abca 203 accmode |= NFSD_MAY_WRITE;
1da177e4
LT		 204
205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
206
207 return status;
208}
209
aadab6c6
BF		 210static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
211{
2b0143b5 212 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
aadab6c6
BF		 213
214 if (S_ISREG(mode))
215 return nfs_ok;
216 if (S_ISDIR(mode))
217 return nfserr_isdir;
218 /*
219 * Using err_symlink as our catch-all case may look odd; but
220 * there's no other obvious error for this case in 4.0, and we
221 * happen to know that it will cause the linux v4 client to do
222 * the right thing on attempts to open something other than a
223 * regular file.
224 */
225 return nfserr_symlink;
226}
227
bbc9c36c
BF		 228static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
229{
230 if (nfsd4_has_session(cstate))
231 return;
232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
233 &resfh->fh_handle);
234}
235
b37ad28b 236static __be32
c0e6bee4 237do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
1da177e4 238{
bbc9c36c 239 struct svc_fh *current_fh = &cstate->current_fh;
7007c90f 240 int accmode;
b37ad28b 241 __be32 status;
1da177e4 242
c0e6bee4
BF		 243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
244 if (!*resfh)
59deeb9e 245 return nfserr_jukebox;
c0e6bee4 246 fh_init(*resfh, NFS4_FHSIZE);
1da177e4
LT		 247 open->op_truncate = 0;
248
249 if (open->op_create) {
79fb54ab
BH		 250 /* FIXME: check session persistence and pnfs flags.
251 * The nfsv4.1 spec requires the following semantics:
252 *
253 * Persistent | pNFS | Server REQUIRED | Client Allowed
254 * Reply Cache | server | |
255 * -------------+--------+-----------------+--------------------
256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
257 * | | | (SHOULD)
258 * | | and EXCLUSIVE4 | or EXCLUSIVE4
259 * | | | (SHOULD NOT)
260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
261 * yes | no | GUARDED4 | GUARDED4
262 * yes | yes | GUARDED4 | GUARDED4
263 */
264
1da177e4
LT		 265 /*
266 * Note: create modes (UNCHECKED,GUARDED...) are the same
ac6721a1 267 * in NFSv4 as in v3 except EXCLUSIVE4_1.
1da177e4 268 */
ac6721a1 269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
1da177e4 270 open->op_fname.len, &open->op_iattr,
c0e6bee4 271 *resfh, open->op_createmode,
749997e5 272 (u32 *)open->op_verf.data,
856121b2 273 &open->op_truncate, &open->op_created);
749997e5 274
18032ca0 275 if (!status && open->op_label.len)
c0e6bee4 276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
18032ca0 277
99f88726
BF		 278 /*
279 * Following rfc 3530 14.2.16, use the returned bitmask
280 * to indicate which attributes we used to store the
281 * verifier:
749997e5
JL		 282 */
283 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0)
99f88726 284 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS |
9dc4e6c4 285 FATTR4_WORD1_TIME_MODIFY);
4335723e
BF		 286 } else
287 /*
288 * Note this may exit with the parent still locked.
289 * We will hold the lock until nfsd4_open's final
290 * lookup, to prevent renames or unlinks until we've had
291 * a chance to an acquire a delegation if appropriate.
292 */
1da177e4 293 status = nfsd_lookup(rqstp, current_fh,
c0e6bee4 294 open->op_fname.data, open->op_fname.len, *resfh);
9dc4e6c4
BF		 295 if (status)
296 goto out;
c0e6bee4 297 status = nfsd_check_obj_isreg(*resfh);
af85852d
BF		 298 if (status)
299 goto out;
1da177e4 300
9208faf2 301 if (is_create_with_attrs(open) && open->op_acl != NULL)
c0e6bee4 302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
9208faf2 303
c0e6bee4 304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
7007c90f 305 accmode = NFSD_MAY_NOP;
89f6c336
BF		 306 if (open->op_created ||
307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
7007c90f 308 accmode |= NFSD_MAY_OWNER_OVERRIDE;
c0e6bee4 309 status = do_open_permission(rqstp, *resfh, open, accmode);
41fd1e42 310 set_change_info(&open->op_cinfo, current_fh);
af85852d 311out:
1da177e4
LT		 312 return status;
313}
314
b37ad28b 315static __be32
bbc9c36c 316do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
1da177e4 317{
bbc9c36c 318 struct svc_fh *current_fh = &cstate->current_fh;
b37ad28b 319 __be32 status;
9f415eb2 320 int accmode = 0;
1da177e4 321
1da177e4
LT		 322 /* We don't know the target directory, and therefore can not
323 * set the change info
324 */
325
326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
327
bbc9c36c 328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
1da177e4
LT		 329
330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
331 (open->op_iattr.ia_size == 0);
9f415eb2
BF		 332 /*
333 * In the delegation case, the client is telling us about an
334 * open that it *already* performed locally, some time ago. We
335 * should let it succeed now if possible.
336 *
337 * In the case of a CLAIM_FH open, on the other hand, the client
338 * may be counting on us to enforce permissions (the Linux 4.1
339 * client uses this for normal opens, for example).
340 */
341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
342 accmode = NFSD_MAY_OWNER_OVERRIDE;
1da177e4 343
9f415eb2 344 status = do_open_permission(rqstp, current_fh, open, accmode);
1da177e4
LT		 345
346 return status;
347}
348
60adfc50
AA		 349static void
350copy_clientid(clientid_t *clid, struct nfsd4_session *session)
351{
352 struct nfsd4_sessionid *sid =
353 (struct nfsd4_sessionid *)session->se_sessionid.data;
354
355 clid->cl_boot = sid->clientid.cl_boot;
356 clid->cl_id = sid->clientid.cl_id;
357}
1da177e4 358
7191155b 359static __be32
ca364317 360nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
a4f1706a 361 struct nfsd4_open *open)
1da177e4 362{
b37ad28b 363 __be32 status;
c0e6bee4 364 struct svc_fh *resfh = NULL;
3320fef1
SK		 365 struct net *net = SVC_NET(rqstp);
366 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6668958f 367
fe0750e5 368 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 369 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 370 open->op_openowner);
1da177e4 371
1da177e4
LT		 372 /* This check required by spec. */
373 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
374 return nfserr_inval;
375
856121b2 376 open->op_created = 0;
ab1350b2
MJ		 377 /*
378 * RFC5661 18.51.3
379 * Before RECLAIM_COMPLETE done, server should deny new lock
380 */
381 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 382 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
383 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 384 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
385 return nfserr_grace;
386
60adfc50
AA		 387 if (nfsd4_has_session(cstate))
388 copy_clientid(&open->op_clientid, cstate->session);
389
1da177e4 390 /* check seqid for replay. set nfs4_owner */
6cd22668 391 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 392 if (status == nfserr_replay_me) {
fe0750e5 393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 394 fh_put(&cstate->current_fh);
a4773c08
BF		 395 fh_copy_shallow(&cstate->current_fh.fh_handle,
396 &rp->rp_openfh);
8837abca 397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 398 if (status)
399 dprintk("nfsd4_open: replay failed"
400 " restoring previous filehandle\n");
401 else
a90b061c 402 status = nfserr_replay_me;
1da177e4
LT		 403 }
404 if (status)
405 goto out;
9d313b17
BF		 406 if (open->op_xdr_error) {
407 status = open->op_xdr_error;
408 goto out;
409 }
fb553c0f 410
3c8e0316
YZ		 411 status = nfsd4_check_open_attributes(rqstp, cstate, open);
412 if (status)
413 goto out;
414
fb553c0f
BF		 415 /* Openowner is now set, so sequence id will get bumped. Now we need
416 * these checks before we do any creates: */
cbd0d51a 417 status = nfserr_grace;
3320fef1 418 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 419 goto out;
420 status = nfserr_no_grace;
3320fef1 421 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 422 goto out;
fb553c0f 423
1da177e4 424 switch (open->op_claim_type) {
0dd3c192 425 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 426 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 427 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 428 if (status)
429 goto out;
430 break;
431 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 432 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 433 cstate, nn);
0cf99b91
MJ		 434 if (status)
435 goto out;
ba5378b6 436 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
8b289b2c
BF		 437 case NFS4_OPEN_CLAIM_FH:
438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 439 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 440 if (status)
441 goto out;
c0e6bee4 442 resfh = &cstate->current_fh;
1da177e4 443 break;
8b289b2c 444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 445 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 446 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 447 open->op_claim_type);
448 status = nfserr_notsupp;
449 goto out;
450 default:
2fdada03 451 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 452 open->op_claim_type);
453 status = nfserr_inval;
454 goto out;
455 }
456 /*
457 * nfsd4_process_open2() does the actual opening of the file. If
458 * successful, it (1) truncates the file if open->op_truncate was
459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
460 */
c0e6bee4 461 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 462 WARN(status && open->op_created,
463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
464 be32_to_cpu(status));
1da177e4 465out:
c0e6bee4
BF		 466 if (resfh && resfh != &cstate->current_fh) {
467 fh_dup2(&cstate->current_fh, resfh);
468 fh_put(resfh);
469 kfree(resfh);
470 }
42297899 471 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 472 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 473 return status;
474}
475
9d313b17
BF		 476/*
477 * OPEN is the only seqid-mutating operation whose decoding can fail
478 * with a seqid-mutating error (specifically, decoding of user names in
479 * the attributes). Therefore we have to do some processing to look up
480 * the stateowner so that we can bump the seqid.
481 */
482static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
483{
484 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
485
486 if (!seqid_mutating_err(ntohl(op->status)))
487 return op->status;
488 if (nfsd4_has_session(cstate))
489 return op->status;
490 open->op_xdr_error = op->status;
491 return nfsd4_open(rqstp, cstate, open);
492}
493
1da177e4
LT		 494/*
495 * filehandle-manipulating ops.
496 */
7191155b 497static __be32
b591480b
BF		 498nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
499 struct svc_fh **getfh)
1da177e4 500{
ca364317 501 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 502 return nfserr_nofilehandle;
503
ca364317 504 *getfh = &cstate->current_fh;
1da177e4
LT		 505 return nfs_ok;
506}
507
7191155b 508static __be32
ca364317
BF		 509nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
510 struct nfsd4_putfh *putfh)
1da177e4 511{
ca364317
BF		 512 fh_put(&cstate->current_fh);
513 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
514 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
515 putfh->pf_fhlen);
68d93184 516 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
1da177e4
LT		 517}
518
7191155b 519static __be32
b591480b
BF		 520nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
521 void *arg)
1da177e4 522{
b37ad28b 523 __be32 status;
1da177e4 524
ca364317 525 fh_put(&cstate->current_fh);
df547efb 526 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 527 return status;
528}
529
7191155b 530static __be32
b591480b
BF		 531nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
532 void *arg)
1da177e4 533{
ca364317 534 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 535 return nfserr_restorefh;
536
ca364317 537 fh_dup2(&cstate->current_fh, &cstate->save_fh);
37c593c5
TM		 538 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
539 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
540 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
541 }
1da177e4
LT		 542 return nfs_ok;
543}
544
7191155b 545static __be32
b591480b
BF		 546nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
547 void *arg)
1da177e4 548{
ca364317 549 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 550 return nfserr_nofilehandle;
551
ca364317 552 fh_dup2(&cstate->save_fh, &cstate->current_fh);
37c593c5
TM		 553 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
554 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
555 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
556 }
1da177e4
LT		 557 return nfs_ok;
558}
559
560/*
561 * misc nfsv4 ops
562 */
7191155b 563static __be32
ca364317
BF		 564nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
565 struct nfsd4_access *access)
1da177e4
LT		 566{
567 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
568 return nfserr_inval;
569
570 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 571 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
572 &access->ac_supported);
1da177e4
LT		 573}
574
b9c0ef85 575static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1
CL		 576{
577 __be32 verf[2];
b9c0ef85 578 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
ab4684d1 579
f419992c
JL		 580 /*
581 * This is opaque to client, so no need to byte-swap. Use
582 * __force to keep sparse happy
583 */
584 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
585 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
ab4684d1
CL		 586 memcpy(verifier->data, verf, sizeof(verifier->data));
587}
588
7191155b 589static __be32
ca364317
BF		 590nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
591 struct nfsd4_commit *commit)
1da177e4 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
BF		 599nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
600 struct nfsd4_create *create)
1da177e4
LT		 601{
602 struct svc_fh resfh;
b37ad28b 603 __be32 status;
1da177e4
LT		 604 dev_t rdev;
605
606 fh_init(&resfh, NFS4_FHSIZE);
607
8837abca
MS		 608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
609 NFSD_MAY_CREATE);
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
1da177e4
LT		 618 switch (create->cr_type) {
619 case NF4LNK:
ca364317
BF		 620 status = nfsd_symlink(rqstp, &cstate->current_fh,
621 create->cr_name, create->cr_namelen,
1e444f5b 622 create->cr_data, &resfh);
1da177e4
LT		 623 break;
624
625 case NF4BLK:
626 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
627 if (MAJOR(rdev) != create->cr_specdata1 ||
628 MINOR(rdev) != create->cr_specdata2)
629 return nfserr_inval;
ca364317
BF		 630 status = nfsd_create(rqstp, &cstate->current_fh,
631 create->cr_name, create->cr_namelen,
632 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 633 break;
634
635 case NF4CHR:
636 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
637 if (MAJOR(rdev) != create->cr_specdata1 ||
638 MINOR(rdev) != create->cr_specdata2)
639 return nfserr_inval;
ca364317
BF		 640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 643 break;
644
645 case NF4SOCK:
ca364317
BF		 646 status = nfsd_create(rqstp, &cstate->current_fh,
647 create->cr_name, create->cr_namelen,
648 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 649 break;
650
651 case NF4FIFO:
ca364317
BF		 652 status = nfsd_create(rqstp, &cstate->current_fh,
653 create->cr_name, create->cr_namelen,
654 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 655 break;
656
657 case NF4DIR:
658 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 659 status = nfsd_create(rqstp, &cstate->current_fh,
660 create->cr_name, create->cr_namelen,
661 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 662 break;
663
664 default:
665 status = nfserr_badtype;
666 }
667
9208faf2
YZ		 668 if (status)
669 goto out;
1da177e4 670
18032ca0
DQ		 671 if (create->cr_label.len)
672 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
673
9208faf2
YZ		 674 if (create->cr_acl != NULL)
675 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
676 create->cr_bmval);
677
678 fh_unlock(&cstate->current_fh);
679 set_change_info(&create->cr_cinfo, &cstate->current_fh);
680 fh_dup2(&cstate->current_fh, &resfh);
681out:
1da177e4
LT		 682 fh_put(&resfh);
683 return status;
684}
685
7191155b 686static __be32
ca364317
BF		 687nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
688 struct nfsd4_getattr *getattr)
1da177e4 689{
b37ad28b 690 __be32 status;
1da177e4 691
8837abca 692 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 693 if (status)
694 return status;
695
696 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
697 return nfserr_inval;
698
7e705706
AA		 699 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
700 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
701 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
1da177e4 702
ca364317 703 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 704 return nfs_ok;
705}
706
7191155b 707static __be32
ca364317
BF		 708nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
709 struct nfsd4_link *link)
1da177e4 710{
b37ad28b 711 __be32 status = nfserr_nofilehandle;
1da177e4 712
ca364317 713 if (!cstate->save_fh.fh_dentry)
1da177e4 714 return status;
ca364317
BF		 715 status = nfsd_link(rqstp, &cstate->current_fh,
716 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 717 if (!status)
ca364317 718 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 719 return status;
720}
721
0ff7ab46 722static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 723{
724 struct svc_fh tmp_fh;
b37ad28b 725 __be32 ret;
1da177e4
LT		 726
727 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 728 ret = exp_pseudoroot(rqstp, &tmp_fh);
729 if (ret)
1da177e4 730 return ret;
0ff7ab46 731 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 732 fh_put(&tmp_fh);
733 return nfserr_noent;
734 }
735 fh_put(&tmp_fh);
0ff7ab46
BF		 736 return nfsd_lookup(rqstp, fh, "..", 2, fh);
737}
738
739static __be32
740nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
741 void *arg)
742{
743 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 744}
745
7191155b 746static __be32
ca364317
BF		 747nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
748 struct nfsd4_lookup *lookup)
1da177e4 749{
ca364317
BF		 750 return nfsd_lookup(rqstp, &cstate->current_fh,
751 lookup->lo_name, lookup->lo_len,
752 &cstate->current_fh);
1da177e4
LT		 753}
754
7191155b 755static __be32
ca364317
BF		 756nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
757 struct nfsd4_read *read)
1da177e4 758{
b37ad28b 759 __be32 status;
1da177e4 760
7e06b7f9 761 read->rd_filp = NULL;
1da177e4
LT		 762 if (read->rd_offset >= OFFSET_MAX)
763 return nfserr_inval;
764
9b3234b9
BF		 765 /*
766 * If we do a zero copy read, then a client will see read data
767 * that reflects the state of the file *after* performing the
768 * following compound.
769 *
770 * To ensure proper ordering, we therefore turn off zero copy if
771 * the client wants us to do more in this compound:
772 */
773 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 774 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 775
1da177e4 776 /* check stateid */
af90f707
CH		 777 status = nfs4_preprocess_stateid_op(rqstp, cstate, &read->rd_stateid,
778 RD_STATE, &read->rd_filp, &read->rd_tmp_file);
779 if (status) {
1da177e4
LT		 780 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
781 goto out;
782 }
783 status = nfs_ok;
784out:
1da177e4 785 read->rd_rqstp = rqstp;
ca364317 786 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 787 return status;
788}
789
7191155b 790static __be32
ca364317
BF		 791nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
792 struct nfsd4_readdir *readdir)
1da177e4
LT		 793{
794 u64 cookie = readdir->rd_cookie;
795 static const nfs4_verifier zeroverf;
796
797 /* no need to check permission - this will be done in nfsd_readdir() */
798
799 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
800 return nfserr_inval;
801
7e705706
AA		 802 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
803 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
804 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
1da177e4 805
832023bf 806 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 807 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
808 return nfserr_bad_cookie;
809
810 readdir->rd_rqstp = rqstp;
ca364317 811 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 812 return nfs_ok;
813}
814
7191155b 815static __be32
ca364317
BF		 816nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
817 struct nfsd4_readlink *readlink)
1da177e4
LT		 818{
819 readlink->rl_rqstp = rqstp;
ca364317 820 readlink->rl_fhp = &cstate->current_fh;
1da177e4
LT		 821 return nfs_ok;
822}
823
7191155b 824static __be32
ca364317
BF		 825nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
826 struct nfsd4_remove *remove)
1da177e4 827{
b37ad28b 828 __be32 status;
1da177e4 829
5ccb0066 830 if (locks_in_grace(SVC_NET(rqstp)))
c815afc7 831 return nfserr_grace;
ca364317
BF		 832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
833 remove->rm_name, remove->rm_namelen);
1da177e4 834 if (!status) {
ca364317
BF		 835 fh_unlock(&cstate->current_fh);
836 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 837 }
838 return status;
839}
840
7191155b 841static __be32
ca364317
BF		 842nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
843 struct nfsd4_rename *rename)
1da177e4 844{
b37ad28b 845 __be32 status = nfserr_nofilehandle;
1da177e4 846
ca364317 847 if (!cstate->save_fh.fh_dentry)
1da177e4 848 return status;
5ccb0066
SK		 849 if (locks_in_grace(SVC_NET(rqstp)) &&
850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
c815afc7 851 return nfserr_grace;
ca364317
BF		 852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
853 rename->rn_snamelen, &cstate->current_fh,
1da177e4 854 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 855 if (status)
856 return status;
857 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
858 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
859 return nfs_ok;
1da177e4
LT		 860}
861
dcb488a3
AA		 862static __be32
863nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
864 struct nfsd4_secinfo *secinfo)
865{
866 struct svc_fh resfh;
867 struct svc_export *exp;
868 struct dentry *dentry;
869 __be32 err;
870
871 fh_init(&resfh, NFS4_FHSIZE);
29a78a3e
BF		 872 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
873 if (err)
874 return err;
dcb488a3
AA		 875 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
876 secinfo->si_name, secinfo->si_namelen,
877 &exp, &dentry);
878 if (err)
879 return err;
2b0143b5 880 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 881 exp_put(exp);
882 err = nfserr_noent;
883 } else
884 secinfo->si_exp = exp;
885 dput(dentry);
56560b9a
BF		 886 if (cstate->minorversion)
887 /* See rfc 5661 section 2.6.3.1.1.8 */
888 fh_put(&cstate->current_fh);
dcb488a3
AA		 889 return err;
890}
891
04f4ad16
BF		 892static __be32
893nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
894 struct nfsd4_secinfo_no_name *sin)
895{
896 __be32 err;
897
898 switch (sin->sin_style) {
899 case NFS4_SECINFO_STYLE4_CURRENT_FH:
900 break;
901 case NFS4_SECINFO_STYLE4_PARENT:
902 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
903 if (err)
904 return err;
905 break;
906 default:
907 return nfserr_inval;
908 }
bf18f163
KM		 909
910 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 911 fh_put(&cstate->current_fh);
912 return nfs_ok;
913}
914
7191155b 915static __be32
ca364317
BF		 916nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
917 struct nfsd4_setattr *setattr)
1da177e4 918{
b37ad28b 919 __be32 status = nfs_ok;
96f6f985 920 int err;
1da177e4 921
1da177e4 922 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707
CH		 923 status = nfs4_preprocess_stateid_op(rqstp, cstate,
924 &setattr->sa_stateid, WR_STATE, NULL, NULL);
375c5547 925 if (status) {
3e3b4800 926 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 927 return status;
928 }
1da177e4 929 }
96f6f985
AV		 930 err = fh_want_write(&cstate->current_fh);
931 if (err)
932 return nfserrno(err);
1da177e4 933 status = nfs_ok;
3c8e0316
YZ		 934
935 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
936 nfsd_attrmask);
937 if (status)
938 goto out;
939
1da177e4 940 if (setattr->sa_acl != NULL)
ca364317
BF		 941 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
942 setattr->sa_acl);
1da177e4 943 if (status)
18f335af 944 goto out;
18032ca0
DQ		 945 if (setattr->sa_label.len)
946 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
947 &setattr->sa_label);
948 if (status)
949 goto out;
ca364317 950 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 951 0, (time_t)0);
18f335af 952out:
bad0dcff 953 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 954 return status;
955}
956
ffe1137b
BF		 957static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
958{
959 int i = 1;
960 int buflen = write->wr_buflen;
961
962 vec[0].iov_base = write->wr_head.iov_base;
963 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
964 buflen -= vec[0].iov_len;
965
966 while (buflen) {
967 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
968 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
969 buflen -= vec[i].iov_len;
970 i++;
971 }
972 return i;
973}
974
7191155b 975static __be32
ca364317
BF		 976nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
977 struct nfsd4_write *write)
1da177e4
LT		 978{
979 stateid_t *stateid = &write->wr_stateid;
980 struct file *filp = NULL;
b37ad28b 981 __be32 status = nfs_ok;
31dec253 982 unsigned long cnt;
ffe1137b 983 int nvecs;
1da177e4 984
1da177e4
LT		 985 if (write->wr_offset >= OFFSET_MAX)
986 return nfserr_inval;
987
af90f707
CH		 988 status = nfs4_preprocess_stateid_op(rqstp, cstate, stateid, WR_STATE,
989 &filp, NULL);
375c5547
BF		 990 if (status) {
991 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
992 return status;
993 }
994
31dec253 995 cnt = write->wr_buflen;
1da177e4 996 write->wr_how_written = write->wr_stable_how;
b9c0ef85 997 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 998
ffe1137b
BF		 999 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1000 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1001
af90f707
CH		 1002 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1003 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
1004 &write->wr_how_written);
1005 fput(filp);
1da177e4 1006
31dec253
DS		 1007 write->wr_bytes_written = cnt;
1008
1da177e4 1009 return status;
1da177e4
LT		 1010}
1011
95d871f0
AS		 1012static __be32
1013nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1014 struct nfsd4_fallocate *fallocate, int flags)
1015{
1016 __be32 status = nfserr_notsupp;
1017 struct file *file;
1018
af90f707 1019 status = nfs4_preprocess_stateid_op(rqstp, cstate,
95d871f0 1020 &fallocate->falloc_stateid,
af90f707 1021 WR_STATE, &file, NULL);
95d871f0
AS		 1022 if (status != nfs_ok) {
1023 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1024 return status;
1025 }
1026
1027 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1028 fallocate->falloc_offset,
1029 fallocate->falloc_length,
1030 flags);
1031 fput(file);
1032 return status;
1033}
1034
1035static __be32
1036nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1037 struct nfsd4_fallocate *fallocate)
1038{
1039 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1040}
1041
b0cb9085
AS		 1042static __be32
1043nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1044 struct nfsd4_fallocate *fallocate)
1045{
1046 return nfsd4_fallocate(rqstp, cstate, fallocate,
1047 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1048}
1049
24bab491
AS		 1050static __be32
1051nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1052 struct nfsd4_seek *seek)
1053{
1054 int whence;
1055 __be32 status;
1056 struct file *file;
1057
af90f707 1058 status = nfs4_preprocess_stateid_op(rqstp, cstate,
24bab491 1059 &seek->seek_stateid,
af90f707 1060 RD_STATE, &file, NULL);
24bab491
AS		 1061 if (status) {
1062 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1063 return status;
1064 }
1065
1066 switch (seek->seek_whence) {
1067 case NFS4_CONTENT_DATA:
1068 whence = SEEK_DATA;
1069 break;
1070 case NFS4_CONTENT_HOLE:
1071 whence = SEEK_HOLE;
1072 break;
1073 default:
1074 status = nfserr_union_notsupp;
1075 goto out;
1076 }
1077
1078 /*
1079 * Note: This call does change file->f_pos, but nothing in NFSD
1080 * should ever file->f_pos.
1081 */
1082 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1083 if (seek->seek_pos < 0)
1084 status = nfserrno(seek->seek_pos);
1085 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1086 seek->seek_eof = true;
1087
1088out:
1089 fput(file);
1090 return status;
1091}
1092
1da177e4
LT		 1093/* This routine never returns NFS_OK! If there are no other errors, it
1094 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1095 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1096 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1097 */
b37ad28b 1098static __be32
c954e2a5 1099_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1100 struct nfsd4_verify *verify)
1da177e4 1101{
2ebbc012 1102 __be32 *buf, *p;
1da177e4 1103 int count;
b37ad28b 1104 __be32 status;
1da177e4 1105
8837abca 1106 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1107 if (status)
1108 return status;
1109
3c8e0316
YZ		 1110 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1111 if (status)
1112 return status;
1113
1da177e4
LT		 1114 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1115 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1116 return nfserr_inval;
1117 if (verify->ve_attrlen & 3)
1118 return nfserr_inval;
1119
1120 /* count in words:
1121 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1122 */
1123 count = 4 + (verify->ve_attrlen >> 2);
1124 buf = kmalloc(count << 2, GFP_KERNEL);
1125 if (!buf)
3e772463 1126 return nfserr_jukebox;
1da177e4 1127
84822d0b 1128 p = buf;
d5184658 1129 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1130 cstate->current_fh.fh_export,
d5184658
BF		 1131 cstate->current_fh.fh_dentry,
1132 verify->ve_bmval,
406a7ea9 1133 rqstp, 0);
41ae6e71
BF		 1134 /*
1135 * If nfsd4_encode_fattr() ran out of space, assume that's because
1136 * the attributes are longer (hence different) than those given:
1137 */
84822d0b 1138 if (status == nfserr_resource)
1da177e4
LT		 1139 status = nfserr_not_same;
1140 if (status)
1141 goto out_kfree;
1142
95ec28cd
BH		 1143 /* skip bitmap */
1144 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1145 status = nfserr_not_same;
1146 if (ntohl(*p++) != verify->ve_attrlen)
1147 goto out_kfree;
1148 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1149 status = nfserr_same;
1150
1151out_kfree:
1152 kfree(buf);
1153 return status;
1154}
1155
c954e2a5
BF		 1156static __be32
1157nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1158 struct nfsd4_verify *verify)
1159{
1160 __be32 status;
1161
1162 status = _nfsd4_verify(rqstp, cstate, verify);
1163 return status == nfserr_not_same ? nfs_ok : status;
1164}
1165
1166static __be32
1167nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1168 struct nfsd4_verify *verify)
1169{
1170 __be32 status;
1171
1172 status = _nfsd4_verify(rqstp, cstate, verify);
1173 return status == nfserr_same ? nfs_ok : status;
1174}
1175
9cf514cc
CH		 1176#ifdef CONFIG_NFSD_PNFS
1177static const struct nfsd4_layout_ops *
1178nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1179{
1180 if (!exp->ex_layout_type) {
1181 dprintk("%s: export does not support pNFS\n", __func__);
1182 return NULL;
1183 }
1184
1185 if (exp->ex_layout_type != layout_type) {
1186 dprintk("%s: layout type %d not supported\n",
1187 __func__, layout_type);
1188 return NULL;
1189 }
1190
1191 return nfsd4_layout_ops[layout_type];
1192}
1193
1194static __be32
1195nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1196 struct nfsd4_compound_state *cstate,
1197 struct nfsd4_getdeviceinfo *gdp)
1198{
1199 const struct nfsd4_layout_ops *ops;
1200 struct nfsd4_deviceid_map *map;
1201 struct svc_export *exp;
1202 __be32 nfserr;
1203
1204 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1205 __func__,
1206 gdp->gd_layout_type,
1207 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1208 gdp->gd_maxcount);
1209
1210 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1211 if (!map) {
1212 dprintk("%s: couldn't find device ID to export mapping!\n",
1213 __func__);
1214 return nfserr_noent;
1215 }
1216
1217 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1218 if (IS_ERR(exp)) {
1219 dprintk("%s: could not find device id\n", __func__);
1220 return nfserr_noent;
1221 }
1222
1223 nfserr = nfserr_layoutunavailable;
1224 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1225 if (!ops)
1226 goto out;
1227
1228 nfserr = nfs_ok;
1229 if (gdp->gd_maxcount != 0)
1230 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp);
1231
1232 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1233out:
a1420384 1234 exp_put(exp);
9cf514cc
CH		 1235 return nfserr;
1236}
1237
1238static __be32
1239nfsd4_layoutget(struct svc_rqst *rqstp,
1240 struct nfsd4_compound_state *cstate,
1241 struct nfsd4_layoutget *lgp)
1242{
1243 struct svc_fh *current_fh = &cstate->current_fh;
1244 const struct nfsd4_layout_ops *ops;
1245 struct nfs4_layout_stateid *ls;
1246 __be32 nfserr;
1247 int accmode;
1248
1249 switch (lgp->lg_seg.iomode) {
1250 case IOMODE_READ:
1251 accmode = NFSD_MAY_READ;
1252 break;
1253 case IOMODE_RW:
1254 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1255 break;
1256 default:
1257 dprintk("%s: invalid iomode %d\n",
1258 __func__, lgp->lg_seg.iomode);
1259 nfserr = nfserr_badiomode;
1260 goto out;
1261 }
1262
1263 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1264 if (nfserr)
1265 goto out;
1266
1267 nfserr = nfserr_layoutunavailable;
1268 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1269 if (!ops)
1270 goto out;
1271
1272 /*
1273 * Verify minlength and range as per RFC5661:
1274 * o If loga_length is less than loga_minlength,
1275 * the metadata server MUST return NFS4ERR_INVAL.
1276 * o If the sum of loga_offset and loga_minlength exceeds
1277 * NFS4_UINT64_MAX, and loga_minlength is not
1278 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1279 * o If the sum of loga_offset and loga_length exceeds
1280 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1281 * the error NFS4ERR_INVAL MUST result.
1282 */
1283 nfserr = nfserr_inval;
1284 if (lgp->lg_seg.length < lgp->lg_minlength ||
1285 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1286 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1287 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1288 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1289 goto out;
1290 if (lgp->lg_seg.length == 0)
1291 goto out;
1292
1293 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1294 true, lgp->lg_layout_type, &ls);
31ef83dc
CH		 1295 if (nfserr) {
1296 trace_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1297 goto out;
31ef83dc 1298 }
9cf514cc 1299
c5c707f9
CH		 1300 nfserr = nfserr_recallconflict;
1301 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1302 goto out_put_stid;
1303
2b0143b5 1304 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1305 current_fh, lgp);
1306 if (nfserr)
1307 goto out_put_stid;
1308
1309 nfserr = nfsd4_insert_layout(lgp, ls);
1310
1311out_put_stid:
1312 nfs4_put_stid(&ls->ls_stid);
1313out:
1314 return nfserr;
1315}
1316
1317static __be32
1318nfsd4_layoutcommit(struct svc_rqst *rqstp,
1319 struct nfsd4_compound_state *cstate,
1320 struct nfsd4_layoutcommit *lcp)
1321{
1322 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1323 struct svc_fh *current_fh = &cstate->current_fh;
1324 const struct nfsd4_layout_ops *ops;
1325 loff_t new_size = lcp->lc_last_wr + 1;
1326 struct inode *inode;
1327 struct nfs4_layout_stateid *ls;
1328 __be32 nfserr;
1329
1330 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1331 if (nfserr)
1332 goto out;
1333
1334 nfserr = nfserr_layoutunavailable;
1335 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1336 if (!ops)
1337 goto out;
2b0143b5 1338 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1339
1340 nfserr = nfserr_inval;
1341 if (new_size <= seg->offset) {
1342 dprintk("pnfsd: last write before layout segment\n");
1343 goto out;
1344 }
1345 if (new_size > seg->offset + seg->length) {
1346 dprintk("pnfsd: last write beyond layout segment\n");
1347 goto out;
1348 }
1349 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1350 dprintk("pnfsd: layoutcommit beyond EOF\n");
1351 goto out;
1352 }
1353
1354 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1355 false, lcp->lc_layout_type,
1356 &ls);
1357 if (nfserr) {
31ef83dc 1358 trace_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1359 /* fixup error code as per RFC5661 */
1360 if (nfserr == nfserr_bad_stateid)
1361 nfserr = nfserr_badlayout;
1362 goto out;
1363 }
1364
9cf514cc
CH		 1365 if (new_size > i_size_read(inode)) {
1366 lcp->lc_size_chg = 1;
1367 lcp->lc_newsize = new_size;
1368 } else {
1369 lcp->lc_size_chg = 0;
1370 }
1371
d8398fc1 1372 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1373 nfs4_put_stid(&ls->ls_stid);
1374out:
1375 return nfserr;
1376}
1377
1378static __be32
1379nfsd4_layoutreturn(struct svc_rqst *rqstp,
1380 struct nfsd4_compound_state *cstate,
1381 struct nfsd4_layoutreturn *lrp)
1382{
1383 struct svc_fh *current_fh = &cstate->current_fh;
1384 __be32 nfserr;
1385
1386 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1387 if (nfserr)
1388 goto out;
1389
1390 nfserr = nfserr_layoutunavailable;
1391 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1392 goto out;
1393
1394 switch (lrp->lr_seg.iomode) {
1395 case IOMODE_READ:
1396 case IOMODE_RW:
1397 case IOMODE_ANY:
1398 break;
1399 default:
1400 dprintk("%s: invalid iomode %d\n", __func__,
1401 lrp->lr_seg.iomode);
1402 nfserr = nfserr_inval;
1403 goto out;
1404 }
1405
1406 switch (lrp->lr_return_type) {
1407 case RETURN_FILE:
1408 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1409 break;
1410 case RETURN_FSID:
1411 case RETURN_ALL:
1412 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1413 break;
1414 default:
1415 dprintk("%s: invalid return_type %d\n", __func__,
1416 lrp->lr_return_type);
1417 nfserr = nfserr_inval;
1418 break;
1419 }
1420out:
1421 return nfserr;
1422}
1423#endif /* CONFIG_NFSD_PNFS */
1424
1da177e4
LT		 1425/*
1426 * NULL call.
1427 */
7111c66e 1428static __be32
1da177e4
LT		 1429nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1430{
1431 return nfs_ok;
1432}
1433
e2b20950
SA		 1434static inline void nfsd4_increment_op_stats(u32 opnum)
1435{
1436 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1437 nfsdstats.nfs4_opcount[opnum]++;
1438}
1439
b591480b
BF		 1440typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1441 void *);
58e7b33a 1442typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
8b70484c
TM		 1443typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1444typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
58e7b33a 1445
f9bb94c4
AA		 1446enum nfsd4_op_flags {
1447 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
5ece3caf
MJ		 1448 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1449 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
68d93184
BF		 1450 /* For rfc 5661 section 2.6.3.1.1: */
1451 OP_HANDLES_WRONGSEC = 1 << 3,
1452 OP_IS_PUTFH_LIKE = 1 << 4,
1091006c 1453 /*
c856694e
BF		 1454 * These are the ops whose result size we estimate before
1455 * encoding, to avoid performing an op then not being able to
1456 * respond or cache a response. This includes writes and setattrs
1457 * as well as the operations usually called "nonidempotent":
1458 */
1459 OP_MODIFIES_SOMETHING = 1 << 5,
1460 /*
1461 * Cache compounds containing these ops in the xid-based drc:
1091006c
BF		 1462 * We use the DRC for compounds containing non-idempotent
1463 * operations, *except* those that are 4.1-specific (since
1464 * sessions provide their own EOS), and except for stateful
1465 * operations other than setclientid and setclientid_confirm
1466 * (since sequence numbers provide EOS for open, lock, etc in
1467 * the v4.0 case).
1468 */
c856694e 1469 OP_CACHEME = 1 << 6,
8b70484c
TM		 1470 /*
1471 * These are ops which clear current state id.
1472 */
1473 OP_CLEAR_STATEID = 1 << 7,
c856694e
BF		 1474};
1475
1476struct nfsd4_operation {
1477 nfsd4op_func op_func;
1478 u32 op_flags;
1479 char *op_name;
58e7b33a
MJ		 1480 /* Try to get response size before operation */
1481 nfsd4op_rsize op_rsize_bop;
24ff99c6
BS		 1482 stateid_getter op_get_currentstateid;
1483 stateid_setter op_set_currentstateid;
b591480b
BF		 1484};
1485
1486static struct nfsd4_operation nfsd4_ops[];
1487
f1c7f79b 1488static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1489
f9bb94c4 1490/*
57716355 1491 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1492 *
57716355
BF		 1493 * Also note, enforced elsewhere:
1494 * - SEQUENCE other than as first op results in
1495 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1496 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1497 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1498 * - DESTROY_SESSION must be the final operation in a compound, if
1499 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1500 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1501 */
57716355 1502static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1503{
57716355
BF		 1504 struct nfsd4_op *op = &args->ops[0];
1505
1506 /* These ordering requirements don't apply to NFSv4.0: */
1507 if (args->minorversion == 0)
1508 return nfs_ok;
1509 /* This is weird, but OK, not our problem: */
1510 if (args->opcnt == 0)
1511 return nfs_ok;
1512 if (op->status == nfserr_op_illegal)
1513 return nfs_ok;
1514 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1515 return nfserr_op_not_in_session;
1516 if (op->opnum == OP_SEQUENCE)
1517 return nfs_ok;
1518 if (args->opcnt != 1)
1519 return nfserr_not_only_op;
1520 return nfs_ok;
f9bb94c4
AA		 1521}
1522
22b03214
BF		 1523static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1524{
1525 return &nfsd4_ops[op->opnum];
1526}
1527
1091006c
BF		 1528bool nfsd4_cache_this_op(struct nfsd4_op *op)
1529{
e372ba60
BF		 1530 if (op->opnum == OP_ILLEGAL)
1531 return false;
c856694e 1532 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1533}
1534
68d93184
BF		 1535static bool need_wrongsec_check(struct svc_rqst *rqstp)
1536{
1537 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1538 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1539 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1540 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1541 struct nfsd4_operation *thisd;
1542 struct nfsd4_operation *nextd;
1543
1544 thisd = OPDESC(this);
1545 /*
1546 * Most ops check wronsec on our own; only the putfh-like ops
1547 * have special rules.
1548 */
1549 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1550 return false;
1551 /*
1552 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1553 * put-filehandle operation if we're not going to use the
1554 * result:
1555 */
1556 if (argp->opcnt == resp->opcnt)
1557 return false;
51904b08
BF		 1558 if (next->opnum == OP_ILLEGAL)
1559 return false;
68d93184
BF		 1560 nextd = OPDESC(next);
1561 /*
1562 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1563 * errors themselves as necessary; others should check for them
1564 * now:
1565 */
1566 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1567}
1568
2d124dfa
BF		 1569static void svcxdr_init_encode(struct svc_rqst *rqstp,
1570 struct nfsd4_compoundres *resp)
1571{
1572 struct xdr_stream *xdr = &resp->xdr;
1573 struct xdr_buf *buf = &rqstp->rq_res;
1574 struct kvec *head = buf->head;
1575
1576 xdr->buf = buf;
ddd1ea56 1577 xdr->iov = head;
2d124dfa 1578 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1579 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1580 /* Tail and page_len should be zero at this point: */
1581 buf->len = buf->head[0].iov_len;
2825a7f9 1582 xdr->scratch.iov_len = 0;
05638dc7 1583 xdr->page_ptr = buf->pages - 1;
2825a7f9 1584 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1585 - rqstp->rq_auth_slack;
2d124dfa
BF		 1586}
1587
1da177e4
LT		 1588/*
1589 * COMPOUND call.
1590 */
7111c66e 1591static __be32
1da177e4
LT		 1592nfsd4_proc_compound(struct svc_rqst *rqstp,
1593 struct nfsd4_compoundargs *args,
1594 struct nfsd4_compoundres *resp)
1595{
1596 struct nfsd4_op *op;
b591480b 1597 struct nfsd4_operation *opdesc;
e354d571 1598 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1599 struct svc_fh *current_fh = &cstate->current_fh;
1600 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1601 __be32 status;
1da177e4 1602
2d124dfa 1603 svcxdr_init_encode(rqstp, resp);
4aea24b2 1604 resp->tagp = resp->xdr.p;
1da177e4 1605 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1606 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1607 resp->taglen = args->taglen;
1608 resp->tag = args->tag;
1da177e4 1609 resp->rqstp = rqstp;
4daeed25 1610 cstate->minorversion = args->minorversion;
4daeed25
KM		 1611 fh_init(current_fh, NFS4_FHSIZE);
1612 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1613 /*
1614 * Don't use the deferral mechanism for NFSv4; compounds make it
1615 * too hard to avoid non-idempotency problems.
1616 */
30660e04 1617 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1618
1619 /*
1620 * According to RFC3010, this takes precedence over all other errors.
1621 */
1622 status = nfserr_minor_vers_mismatch;
35f7a14f 1623 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4
LT		 1624 goto out;
1625
57716355
BF		 1626 status = nfs41_check_op_ordering(args);
1627 if (status) {
f9bb94c4 1628 op = &args->ops[0];
57716355 1629 op->status = status;
f9bb94c4
AA		 1630 goto encode_op;
1631 }
1632
1da177e4
LT		 1633 while (!status && resp->opcnt < args->opcnt) {
1634 op = &args->ops[resp->opcnt++];
1635
b001a1b6
BH		 1636 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1637 resp->opcnt, args->opcnt, op->opnum,
1638 nfsd4_op_name(op->opnum));
1da177e4
LT		 1639 /*
1640 * The XDR decode routines may have pre-set op->status;
1641 * for example, if there is a miscellaneous XDR error
1642 * it will be set to nfserr_bad_xdr.
1643 */
9d313b17
BF		 1644 if (op->status) {
1645 if (op->opnum == OP_OPEN)
1646 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1647 goto encode_op;
9d313b17 1648 }
1da177e4 1649
22b03214 1650 opdesc = OPDESC(op);
b591480b 1651
4daeed25 1652 if (!current_fh->fh_dentry) {
27d630ec 1653 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1654 op->status = nfserr_nofilehandle;
1655 goto encode_op;
1656 }
4daeed25 1657 } else if (current_fh->fh_export->ex_fslocs.migrated &&
eeac294e 1658 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1659 op->status = nfserr_moved;
1da177e4
LT		 1660 goto encode_op;
1661 }
b591480b 1662
2336745e
KM		 1663 fh_clear_wcc(current_fh);
1664
58e7b33a
MJ		 1665 /* If op is non-idempotent */
1666 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1667 /*
a8095f7e
BF		 1668 * Don't execute this op if we couldn't encode a
1669 * succesful reply:
1670 */
1671 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1672 /*
1673 * Plus if there's another operation, make sure
4c69d585
BF		 1674 * we'll have space to at least encode an error:
1675 */
1676 if (resp->opcnt < args->opcnt)
1677 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1678 op->status = nfsd4_check_resp_size(resp, plen);
1679 }
1680
1681 if (op->status)
1682 goto encode_op;
1683
b600de7a
BF		 1684 if (opdesc->op_get_currentstateid)
1685 opdesc->op_get_currentstateid(cstate, &op->u);
1686 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1687
8b70484c
TM		 1688 if (!op->status) {
1689 if (opdesc->op_set_currentstateid)
1690 opdesc->op_set_currentstateid(cstate, &op->u);
1691
1692 if (opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1693 clear_current_stateid(cstate);
8b70484c
TM		 1694
1695 if (need_wrongsec_check(rqstp))
4daeed25 1696 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1697 }
68d93184 1698
1da177e4 1699encode_op:
49557cc7 1700 /* Only from SEQUENCE */
4daeed25 1701 if (cstate->status == nfserr_replay_cache) {
da3846a2 1702 dprintk("%s NFS4.1 replay from cache\n", __func__);
abfabf8c 1703 status = op->status;
da3846a2
AA		 1704 goto out;
1705 }
a90b061c 1706 if (op->status == nfserr_replay_me) {
a4f1706a 1707 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1708 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1709 status = op->status = op->replay->rp_status;
1710 } else {
1711 nfsd4_encode_operation(resp, op);
1712 status = op->status;
1713 }
0407717d
BH		 1714
1715 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1716 args->ops, args->opcnt, resp->opcnt, op->opnum,
1717 be32_to_cpu(status));
1718
58fb12e6 1719 nfsd4_cstate_clear_replay(cstate);
e2b20950 1720 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1721 }
1722
4daeed25
KM		 1723 cstate->status = status;
1724 fh_put(current_fh);
1725 fh_put(save_fh);
1726 BUG_ON(cstate->replay_owner);
1da177e4 1727out:
2f425878 1728 /* Reset deferral mechanism for RPC deferrals */
30660e04 1729 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1730 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1731 return status;
1732}
1733
58e7b33a
MJ		 1734#define op_encode_hdr_size (2)
1735#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1736#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1737#define op_encode_change_info_maxsz (5)
1738#define nfs4_fattr_bitmap_maxsz (4)
1739
8c7424cf
BF		 1740/* We'll fall back on returning no lockowner if run out of space: */
1741#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1742#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1743
1744#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1745
1746#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1747#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1748 op_encode_ace_maxsz)
1749
1750#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1751
1752static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1753{
1754 return (op_encode_hdr_size) * sizeof(__be32);
1755}
1756
1757static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1758{
1759 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1760}
1761
1762static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1763{
1764 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1765}
1766
1767static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1768{
1769 return (op_encode_hdr_size + op_encode_change_info_maxsz
1770 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1771}
1772
b86cef60
BF		 1773/*
1774 * Note since this is an idempotent operation we won't insist on failing
1775 * the op prematurely if the estimate is too large. We may turn off splice
1776 * reads unnecessarily.
1777 */
1778static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1779 struct nfsd4_op *op)
1780{
1781 u32 *bmap = op->u.getattr.ga_bmval;
1782 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1783 u32 ret = 0;
1784
1785 if (bmap0 & FATTR4_WORD0_ACL)
1786 return svc_max_payload(rqstp);
1787 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1788 return svc_max_payload(rqstp);
1789
1790 if (bmap1 & FATTR4_WORD1_OWNER) {
1791 ret += IDMAP_NAMESZ + 4;
1792 bmap1 &= ~FATTR4_WORD1_OWNER;
1793 }
1794 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1795 ret += IDMAP_NAMESZ + 4;
1796 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1797 }
1798 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1799 ret += NFS4_FHSIZE + 4;
1800 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1801 }
1802 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 1803 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 1804 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1805 }
1806 /*
1807 * Largest of remaining attributes are 16 bytes (e.g.,
1808 * supported_attributes)
1809 */
1810 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1811 /* bitmask, length */
1812 ret += 20;
1813 return ret;
1814}
1815
58e7b33a
MJ		 1816static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1817{
1818 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1819 * sizeof(__be32);
1820}
1821
1822static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1823{
1824 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1825 * sizeof(__be32);
1826}
1827
1828static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1829{
1830 return (op_encode_hdr_size + op_encode_stateid_maxsz
1831 + op_encode_change_info_maxsz + 1
1832 + nfs4_fattr_bitmap_maxsz
1833 + op_encode_delegation_maxsz) * sizeof(__be32);
1834}
1835
1836static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1837{
1838 u32 maxcount = 0, rlen = 0;
1839
1840 maxcount = svc_max_payload(rqstp);
3c7aa15d 1841 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1842
622f560e 1843 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1844}
1845
1846static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1847{
3c7aa15d 1848 u32 maxcount = 0, rlen = 0;
58e7b33a 1849
3c7aa15d
KM		 1850 maxcount = svc_max_payload(rqstp);
1851 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1852
561f0ed4
BF		 1853 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1854 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1855}
1856
1857static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1858{
1859 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1860 * sizeof(__be32);
1861}
1862
1863static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1864{
1865 return (op_encode_hdr_size + op_encode_change_info_maxsz
1866 + op_encode_change_info_maxsz) * sizeof(__be32);
1867}
1868
ccae70a9
BF		 1869static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1870 struct nfsd4_op *op)
1871{
d1d84c96
BF		 1872 return (op_encode_hdr_size
1873 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1874}
1875
58e7b33a
MJ		 1876static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1877{
1878 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1879}
1880
1881static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1882{
480efaee
BF		 1883 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1884 sizeof(__be32);
58e7b33a
MJ		 1885}
1886
1887static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1888{
f34e432b 1889 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 1890}
1891
1892static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1893{
1894 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 1895 1 + 1 + /* eir_flags, spr_how */\
1896 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 1897 2 + /*eir_server_owner.so_minor_id */\
1898 /* eir_server_owner.so_major_id<> */\
1899 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1900 /* eir_server_scope<> */\
1901 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1902 1 + /* eir_server_impl_id array length */\
1903 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1904}
1905
1906static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1907{
1908 return (op_encode_hdr_size + \
1909 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1910 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1911}
1912
1913static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1914{
1915 return (op_encode_hdr_size + \
1916 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1917 2 + /* csr_sequence, csr_flags */\
1918 op_encode_channel_attrs_maxsz + \
1919 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1920}
1921
9cf514cc
CH		 1922#ifdef CONFIG_NFSD_PNFS
1923/*
1924 * At this stage we don't really know what layout driver will handle the request,
1925 * so we need to define an arbitrary upper bound here.
1926 */
1927#define MAX_LAYOUT_SIZE 128
1928static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1929{
1930 return (op_encode_hdr_size +
1931 1 /* logr_return_on_close */ +
1932 op_encode_stateid_maxsz +
1933 1 /* nr of layouts */ +
1934 MAX_LAYOUT_SIZE) * sizeof(__be32);
1935}
1936
1937static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1938{
1939 return (op_encode_hdr_size +
1940 1 /* locr_newsize */ +
1941 2 /* ns_size */) * sizeof(__be32);
1942}
1943
1944static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1945{
1946 return (op_encode_hdr_size +
1947 1 /* lrs_stateid */ +
1948 op_encode_stateid_maxsz) * sizeof(__be32);
1949}
1950#endif /* CONFIG_NFSD_PNFS */
1951
20766016 1952static struct nfsd4_operation nfsd4_ops[] = {
b591480b
BF		 1953 [OP_ACCESS] = {
1954 .op_func = (nfsd4op_func)nfsd4_access,
b001a1b6 1955 .op_name = "OP_ACCESS",
b591480b
BF		 1956 },
1957 [OP_CLOSE] = {
1958 .op_func = (nfsd4op_func)nfsd4_close,
58e7b33a 1959 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 1960 .op_name = "OP_CLOSE",
58e7b33a 1961 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
8b70484c
TM		 1962 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1963 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
b591480b
BF		 1964 },
1965 [OP_COMMIT] = {
1966 .op_func = (nfsd4op_func)nfsd4_commit,
58e7b33a 1967 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 1968 .op_name = "OP_COMMIT",
58e7b33a 1969 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
b591480b
BF		 1970 },
1971 [OP_CREATE] = {
1972 .op_func = (nfsd4op_func)nfsd4_create,
d1471053 1973 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 1974 .op_name = "OP_CREATE",
58e7b33a 1975 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
b591480b
BF		 1976 },
1977 [OP_DELEGRETURN] = {
1978 .op_func = (nfsd4op_func)nfsd4_delegreturn,
58e7b33a 1979 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 1980 .op_name = "OP_DELEGRETURN",
58e7b33a 1981 .op_rsize_bop = nfsd4_only_status_rsize,
9428fe1a 1982 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
b591480b
BF		 1983 },
1984 [OP_GETATTR] = {
1985 .op_func = (nfsd4op_func)nfsd4_getattr,
eeac294e 1986 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 1987 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 1988 .op_name = "OP_GETATTR",
b591480b
BF		 1989 },
1990 [OP_GETFH] = {
1991 .op_func = (nfsd4op_func)nfsd4_getfh,
b001a1b6 1992 .op_name = "OP_GETFH",
b591480b
BF		 1993 },
1994 [OP_LINK] = {
1995 .op_func = (nfsd4op_func)nfsd4_link,
c856694e
BF		 1996 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
1997 | OP_CACHEME,
b001a1b6 1998 .op_name = "OP_LINK",
58e7b33a 1999 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
b591480b
BF		 2000 },
2001 [OP_LOCK] = {
2002 .op_func = (nfsd4op_func)nfsd4_lock,
58e7b33a 2003 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2004 .op_name = "OP_LOCK",
58e7b33a 2005 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
62cd4a59 2006 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
b591480b
BF		 2007 },
2008 [OP_LOCKT] = {
2009 .op_func = (nfsd4op_func)nfsd4_lockt,
b001a1b6 2010 .op_name = "OP_LOCKT",
b591480b
BF		 2011 },
2012 [OP_LOCKU] = {
2013 .op_func = (nfsd4op_func)nfsd4_locku,
58e7b33a 2014 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2015 .op_name = "OP_LOCKU",
58e7b33a 2016 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
62cd4a59 2017 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
b591480b
BF		 2018 },
2019 [OP_LOOKUP] = {
2020 .op_func = (nfsd4op_func)nfsd4_lookup,
d1471053 2021 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2022 .op_name = "OP_LOOKUP",
b591480b
BF		 2023 },
2024 [OP_LOOKUPP] = {
2025 .op_func = (nfsd4op_func)nfsd4_lookupp,
d1471053 2026 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2027 .op_name = "OP_LOOKUPP",
b591480b
BF		 2028 },
2029 [OP_NVERIFY] = {
2030 .op_func = (nfsd4op_func)nfsd4_nverify,
b001a1b6 2031 .op_name = "OP_NVERIFY",
b591480b
BF		 2032 },
2033 [OP_OPEN] = {
2034 .op_func = (nfsd4op_func)nfsd4_open,
58e7b33a 2035 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2036 .op_name = "OP_OPEN",
58e7b33a 2037 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
8b70484c 2038 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
b591480b
BF		 2039 },
2040 [OP_OPEN_CONFIRM] = {
2041 .op_func = (nfsd4op_func)nfsd4_open_confirm,
58e7b33a 2042 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2043 .op_name = "OP_OPEN_CONFIRM",
58e7b33a 2044 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
b591480b
BF		 2045 },
2046 [OP_OPEN_DOWNGRADE] = {
2047 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
58e7b33a 2048 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2049 .op_name = "OP_OPEN_DOWNGRADE",
58e7b33a 2050 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
9428fe1a
TM		 2051 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2052 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
b591480b
BF		 2053 },
2054 [OP_PUTFH] = {
2055 .op_func = (nfsd4op_func)nfsd4_putfh,
68d93184 2056 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2057 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2058 .op_name = "OP_PUTFH",
58e7b33a 2059 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2060 },
eeac294e 2061 [OP_PUTPUBFH] = {
a1c8c4d1 2062 .op_func = (nfsd4op_func)nfsd4_putrootfh,
68d93184 2063 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2064 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2065 .op_name = "OP_PUTPUBFH",
58e7b33a 2066 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
eeac294e 2067 },
b591480b
BF		 2068 [OP_PUTROOTFH] = {
2069 .op_func = (nfsd4op_func)nfsd4_putrootfh,
68d93184 2070 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2071 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2072 .op_name = "OP_PUTROOTFH",
58e7b33a 2073 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2074 },
2075 [OP_READ] = {
2076 .op_func = (nfsd4op_func)nfsd4_read,
b001a1b6 2077 .op_name = "OP_READ",
58e7b33a 2078 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
30813e27 2079 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
b591480b
BF		 2080 },
2081 [OP_READDIR] = {
2082 .op_func = (nfsd4op_func)nfsd4_readdir,
b001a1b6 2083 .op_name = "OP_READDIR",
58e7b33a 2084 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
b591480b
BF		 2085 },
2086 [OP_READLINK] = {
2087 .op_func = (nfsd4op_func)nfsd4_readlink,
b001a1b6 2088 .op_name = "OP_READLINK",
b591480b
BF		 2089 },
2090 [OP_REMOVE] = {
2091 .op_func = (nfsd4op_func)nfsd4_remove,
c856694e 2092 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2093 .op_name = "OP_REMOVE",
58e7b33a 2094 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
b591480b
BF		 2095 },
2096 [OP_RENAME] = {
2097 .op_func = (nfsd4op_func)nfsd4_rename,
c856694e 2098 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2099 .op_name = "OP_RENAME",
58e7b33a 2100 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
b591480b
BF		 2101 },
2102 [OP_RENEW] = {
2103 .op_func = (nfsd4op_func)nfsd4_renew,
58e7b33a
MJ		 2104 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2105 | OP_MODIFIES_SOMETHING,
b001a1b6 2106 .op_name = "OP_RENEW",
58e7b33a
MJ		 2107 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2108
b591480b
BF		 2109 },
2110 [OP_RESTOREFH] = {
2111 .op_func = (nfsd4op_func)nfsd4_restorefh,
68d93184 2112 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2113 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2114 .op_name = "OP_RESTOREFH",
58e7b33a 2115 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2116 },
2117 [OP_SAVEFH] = {
2118 .op_func = (nfsd4op_func)nfsd4_savefh,
58e7b33a 2119 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2120 .op_name = "OP_SAVEFH",
58e7b33a 2121 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2122 },
dcb488a3
AA		 2123 [OP_SECINFO] = {
2124 .op_func = (nfsd4op_func)nfsd4_secinfo,
68d93184 2125 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2126 .op_name = "OP_SECINFO",
dcb488a3 2127 },
b591480b
BF		 2128 [OP_SETATTR] = {
2129 .op_func = (nfsd4op_func)nfsd4_setattr,
b001a1b6 2130 .op_name = "OP_SETATTR",
c856694e 2131 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2132 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1e97b519 2133 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
b591480b
BF		 2134 },
2135 [OP_SETCLIENTID] = {
2136 .op_func = (nfsd4op_func)nfsd4_setclientid,
58e7b33a 2137 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2138 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2139 .op_name = "OP_SETCLIENTID",
58e7b33a 2140 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
b591480b
BF		 2141 },
2142 [OP_SETCLIENTID_CONFIRM] = {
2143 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
58e7b33a 2144 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2145 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2146 .op_name = "OP_SETCLIENTID_CONFIRM",
58e7b33a 2147 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2148 },
2149 [OP_VERIFY] = {
2150 .op_func = (nfsd4op_func)nfsd4_verify,
b001a1b6 2151 .op_name = "OP_VERIFY",
b591480b
BF		 2152 },
2153 [OP_WRITE] = {
2154 .op_func = (nfsd4op_func)nfsd4_write,
c856694e 2155 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2156 .op_name = "OP_WRITE",
58e7b33a 2157 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
30813e27 2158 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
b591480b
BF		 2159 },
2160 [OP_RELEASE_LOCKOWNER] = {
2161 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
58e7b33a
MJ		 2162 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2163 | OP_MODIFIES_SOMETHING,
b001a1b6 2164 .op_name = "OP_RELEASE_LOCKOWNER",
58e7b33a 2165 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2166 },
069b6ad4
AA		 2167
2168 /* NFSv4.1 operations */
2169 [OP_EXCHANGE_ID] = {
2170 .op_func = (nfsd4op_func)nfsd4_exchange_id,
58e7b33a
MJ		 2171 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2172 | OP_MODIFIES_SOMETHING,
069b6ad4 2173 .op_name = "OP_EXCHANGE_ID",
58e7b33a 2174 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
069b6ad4 2175 },
cb73a9f4
BF		 2176 [OP_BACKCHANNEL_CTL] = {
2177 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2178 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2179 .op_name = "OP_BACKCHANNEL_CTL",
2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2181 },
1d1bc8f2
BF		 2182 [OP_BIND_CONN_TO_SESSION] = {
2183 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2184 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2185 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2186 .op_name = "OP_BIND_CONN_TO_SESSION",
58e7b33a 2187 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2188 },
069b6ad4
AA		 2189 [OP_CREATE_SESSION] = {
2190 .op_func = (nfsd4op_func)nfsd4_create_session,
58e7b33a
MJ		 2191 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2192 | OP_MODIFIES_SOMETHING,
069b6ad4 2193 .op_name = "OP_CREATE_SESSION",
58e7b33a 2194 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
069b6ad4
AA		 2195 },
2196 [OP_DESTROY_SESSION] = {
2197 .op_func = (nfsd4op_func)nfsd4_destroy_session,
58e7b33a
MJ		 2198 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2199 | OP_MODIFIES_SOMETHING,
069b6ad4 2200 .op_name = "OP_DESTROY_SESSION",
58e7b33a 2201 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
069b6ad4
AA		 2202 },
2203 [OP_SEQUENCE] = {
2204 .op_func = (nfsd4op_func)nfsd4_sequence,
f9bb94c4 2205 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2206 .op_name = "OP_SEQUENCE",
d1d84c96 2207 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
069b6ad4 2208 },
094b5d74 2209 [OP_DESTROY_CLIENTID] = {
345c2842 2210 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
58e7b33a
MJ		 2211 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2212 | OP_MODIFIES_SOMETHING,
094b5d74 2213 .op_name = "OP_DESTROY_CLIENTID",
58e7b33a 2214 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
094b5d74 2215 },
4dc6ec00
BF		 2216 [OP_RECLAIM_COMPLETE] = {
2217 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
58e7b33a 2218 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2219 .op_name = "OP_RECLAIM_COMPLETE",
58e7b33a 2220 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
4dc6ec00 2221 },
04f4ad16
BF		 2222 [OP_SECINFO_NO_NAME] = {
2223 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
68d93184 2224 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16
BF		 2225 .op_name = "OP_SECINFO_NO_NAME",
2226 },
17456804
BS		 2227 [OP_TEST_STATEID] = {
2228 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2229 .op_flags = ALLOWED_WITHOUT_FH,
2230 .op_name = "OP_TEST_STATEID",
2231 },
e1ca12df
BS		 2232 [OP_FREE_STATEID] = {
2233 .op_func = (nfsd4op_func)nfsd4_free_stateid,
58e7b33a 2234 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2235 .op_name = "OP_FREE_STATEID",
a1dc6955 2236 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
58e7b33a 2237 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
e1ca12df 2238 },
9cf514cc
CH		 2239#ifdef CONFIG_NFSD_PNFS
2240 [OP_GETDEVICEINFO] = {
2241 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2242 .op_flags = ALLOWED_WITHOUT_FH,
2243 .op_name = "OP_GETDEVICEINFO",
2244 },
2245 [OP_LAYOUTGET] = {
2246 .op_func = (nfsd4op_func)nfsd4_layoutget,
2247 .op_flags = OP_MODIFIES_SOMETHING,
2248 .op_name = "OP_LAYOUTGET",
2249 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2250 },
2251 [OP_LAYOUTCOMMIT] = {
2252 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2253 .op_flags = OP_MODIFIES_SOMETHING,
2254 .op_name = "OP_LAYOUTCOMMIT",
2255 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2256 },
2257 [OP_LAYOUTRETURN] = {
2258 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2259 .op_flags = OP_MODIFIES_SOMETHING,
2260 .op_name = "OP_LAYOUTRETURN",
2261 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2262 },
2263#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2264
2265 /* NFSv4.2 operations */
95d871f0
AS		 2266 [OP_ALLOCATE] = {
2267 .op_func = (nfsd4op_func)nfsd4_allocate,
2268 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2269 .op_name = "OP_ALLOCATE",
beaca234 2270 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
95d871f0 2271 },
b0cb9085
AS		 2272 [OP_DEALLOCATE] = {
2273 .op_func = (nfsd4op_func)nfsd4_deallocate,
2274 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2275 .op_name = "OP_DEALLOCATE",
beaca234 2276 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b0cb9085 2277 },
24bab491
AS		 2278 [OP_SEEK] = {
2279 .op_func = (nfsd4op_func)nfsd4_seek,
2280 .op_name = "OP_SEEK",
2281 },
b591480b
BF		 2282};
2283
4f0cefbf
BF		 2284int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2285{
2286 struct nfsd4_operation *opdesc;
2287 nfsd4op_rsize estimator;
2288
2289 if (op->opnum == OP_ILLEGAL)
2290 return op_encode_hdr_size * sizeof(__be32);
2291 opdesc = OPDESC(op);
2292 estimator = opdesc->op_rsize_bop;
2293 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
2294}
2295
07d1f802
BF		 2296void warn_on_nonidempotent_op(struct nfsd4_op *op)
2297{
2298 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2299 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2300 op->opnum, nfsd4_op_name(op->opnum));
2301 WARN_ON_ONCE(1);
2302 }
2303}
2304
f1c7f79b 2305static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2306{
2307 if (opnum < ARRAY_SIZE(nfsd4_ops))
2308 return nfsd4_ops[opnum].op_name;
2309 return "unknown_operation";
2310}
2311
1da177e4 2312#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2313struct nfsd4_voidargs { int dummy; };
2314
1da177e4 2315static struct svc_procedure nfsd_procedures4[2] = {
0a93a47f
YZ		 2316 [NFSPROC4_NULL] = {
2317 .pc_func = (svc_procfunc) nfsd4_proc_null,
2318 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2319 .pc_argsize = sizeof(struct nfsd4_voidargs),
2320 .pc_ressize = sizeof(struct nfsd4_voidres),
2321 .pc_cachetype = RC_NOCACHE,
2322 .pc_xdrressize = 1,
2323 },
2324 [NFSPROC4_COMPOUND] = {
2325 .pc_func = (svc_procfunc) nfsd4_proc_compound,
2326 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
2327 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2328 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2329 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2330 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2331 .pc_cachetype = RC_NOCACHE,
2332 .pc_xdrressize = NFSD_BUFSIZE/4,
2333 },
1da177e4
LT		 2334};
2335
2336struct svc_version nfsd_version4 = {
2337 .vs_vers = 4,
2338 .vs_nproc = 2,
2339 .vs_proc = nfsd_procedures4,
2340 .vs_dispatch = nfsd_dispatch,
2341 .vs_xdrsize = NFS4_SVC_XDRSIZE,
7e55b59b 2342 .vs_rpcb_optnl = 1,
1da177e4
LT		 2343};
2344
2345/*
2346 * Local variables:
2347 * c-basic-offset: 8
2348 * End:
2349 */
Linux kernel - Deliverables
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