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VFS: normal filesystems (and lustre): d_inode() annotations
[linux-2.6-block.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;
6668958f 365 struct nfsd4_compoundres *resp;
3320fef1
SK		 366 struct net *net = SVC_NET(rqstp);
367 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6668958f 368
fe0750e5 369 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 370 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 371 open->op_openowner);
1da177e4 372
1da177e4
LT		 373 /* This check required by spec. */
374 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
375 return nfserr_inval;
376
856121b2 377 open->op_created = 0;
ab1350b2
MJ		 378 /*
379 * RFC5661 18.51.3
380 * Before RECLAIM_COMPLETE done, server should deny new lock
381 */
382 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 383 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
384 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 385 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
386 return nfserr_grace;
387
60adfc50
AA		 388 if (nfsd4_has_session(cstate))
389 copy_clientid(&open->op_clientid, cstate->session);
390
1da177e4 391 /* check seqid for replay. set nfs4_owner */
6668958f 392 resp = rqstp->rq_resp;
3320fef1 393 status = nfsd4_process_open1(&resp->cstate, open, nn);
a90b061c 394 if (status == nfserr_replay_me) {
fe0750e5 395 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 396 fh_put(&cstate->current_fh);
a4773c08
BF		 397 fh_copy_shallow(&cstate->current_fh.fh_handle,
398 &rp->rp_openfh);
8837abca 399 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 400 if (status)
401 dprintk("nfsd4_open: replay failed"
402 " restoring previous filehandle\n");
403 else
a90b061c 404 status = nfserr_replay_me;
1da177e4
LT		 405 }
406 if (status)
407 goto out;
9d313b17
BF		 408 if (open->op_xdr_error) {
409 status = open->op_xdr_error;
410 goto out;
411 }
fb553c0f 412
3c8e0316
YZ		 413 status = nfsd4_check_open_attributes(rqstp, cstate, open);
414 if (status)
415 goto out;
416
fb553c0f
BF		 417 /* Openowner is now set, so sequence id will get bumped. Now we need
418 * these checks before we do any creates: */
cbd0d51a 419 status = nfserr_grace;
3320fef1 420 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 421 goto out;
422 status = nfserr_no_grace;
3320fef1 423 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 424 goto out;
fb553c0f 425
1da177e4 426 switch (open->op_claim_type) {
0dd3c192 427 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 428 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 429 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 430 if (status)
431 goto out;
432 break;
433 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 434 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 435 cstate, nn);
0cf99b91
MJ		 436 if (status)
437 goto out;
ba5378b6 438 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
8b289b2c
BF		 439 case NFS4_OPEN_CLAIM_FH:
440 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 441 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 442 if (status)
443 goto out;
c0e6bee4 444 resfh = &cstate->current_fh;
1da177e4 445 break;
8b289b2c 446 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 447 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 448 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 449 open->op_claim_type);
450 status = nfserr_notsupp;
451 goto out;
452 default:
2fdada03 453 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 454 open->op_claim_type);
455 status = nfserr_inval;
456 goto out;
457 }
458 /*
459 * nfsd4_process_open2() does the actual opening of the file. If
460 * successful, it (1) truncates the file if open->op_truncate was
461 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
462 */
c0e6bee4 463 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 464 WARN(status && open->op_created,
465 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
466 be32_to_cpu(status));
1da177e4 467out:
c0e6bee4
BF		 468 if (resfh && resfh != &cstate->current_fh) {
469 fh_dup2(&cstate->current_fh, resfh);
470 fh_put(resfh);
471 kfree(resfh);
472 }
58fb12e6 473 nfsd4_cleanup_open_state(cstate, open, status);
9411b1d4 474 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 475 return status;
476}
477
9d313b17
BF		 478/*
479 * OPEN is the only seqid-mutating operation whose decoding can fail
480 * with a seqid-mutating error (specifically, decoding of user names in
481 * the attributes). Therefore we have to do some processing to look up
482 * the stateowner so that we can bump the seqid.
483 */
484static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
485{
486 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
487
488 if (!seqid_mutating_err(ntohl(op->status)))
489 return op->status;
490 if (nfsd4_has_session(cstate))
491 return op->status;
492 open->op_xdr_error = op->status;
493 return nfsd4_open(rqstp, cstate, open);
494}
495
1da177e4
LT		 496/*
497 * filehandle-manipulating ops.
498 */
7191155b 499static __be32
b591480b
BF		 500nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
501 struct svc_fh **getfh)
1da177e4 502{
ca364317 503 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 504 return nfserr_nofilehandle;
505
ca364317 506 *getfh = &cstate->current_fh;
1da177e4
LT		 507 return nfs_ok;
508}
509
7191155b 510static __be32
ca364317
BF		 511nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
512 struct nfsd4_putfh *putfh)
1da177e4 513{
ca364317
BF		 514 fh_put(&cstate->current_fh);
515 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
516 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
517 putfh->pf_fhlen);
68d93184 518 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
1da177e4
LT		 519}
520
7191155b 521static __be32
b591480b
BF		 522nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
523 void *arg)
1da177e4 524{
b37ad28b 525 __be32 status;
1da177e4 526
ca364317 527 fh_put(&cstate->current_fh);
df547efb 528 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 529 return status;
530}
531
7191155b 532static __be32
b591480b
BF		 533nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
534 void *arg)
1da177e4 535{
ca364317 536 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 537 return nfserr_restorefh;
538
ca364317 539 fh_dup2(&cstate->current_fh, &cstate->save_fh);
37c593c5
TM		 540 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
541 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
542 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
543 }
1da177e4
LT		 544 return nfs_ok;
545}
546
7191155b 547static __be32
b591480b
BF		 548nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
549 void *arg)
1da177e4 550{
ca364317 551 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 552 return nfserr_nofilehandle;
553
ca364317 554 fh_dup2(&cstate->save_fh, &cstate->current_fh);
37c593c5
TM		 555 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
556 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
557 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
558 }
1da177e4
LT		 559 return nfs_ok;
560}
561
562/*
563 * misc nfsv4 ops
564 */
7191155b 565static __be32
ca364317
BF		 566nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
567 struct nfsd4_access *access)
1da177e4
LT		 568{
569 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
570 return nfserr_inval;
571
572 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 573 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
574 &access->ac_supported);
1da177e4
LT		 575}
576
b9c0ef85 577static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1
CL		 578{
579 __be32 verf[2];
b9c0ef85 580 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
ab4684d1 581
f419992c
JL		 582 /*
583 * This is opaque to client, so no need to byte-swap. Use
584 * __force to keep sparse happy
585 */
586 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
587 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
ab4684d1
CL		 588 memcpy(verifier->data, verf, sizeof(verifier->data));
589}
590
7191155b 591static __be32
ca364317
BF		 592nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
593 struct nfsd4_commit *commit)
1da177e4 594{
b9c0ef85 595 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
75c096f7 596 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
ca364317 597 commit->co_count);
1da177e4
LT		 598}
599
b37ad28b 600static __be32
ca364317
BF		 601nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
602 struct nfsd4_create *create)
1da177e4
LT		 603{
604 struct svc_fh resfh;
b37ad28b 605 __be32 status;
1da177e4
LT		 606 dev_t rdev;
607
608 fh_init(&resfh, NFS4_FHSIZE);
609
8837abca
MS		 610 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR,
611 NFSD_MAY_CREATE);
1da177e4
LT		 612 if (status)
613 return status;
614
3c8e0316
YZ		 615 status = check_attr_support(rqstp, cstate, create->cr_bmval,
616 nfsd_attrmask);
617 if (status)
618 return status;
619
1da177e4
LT		 620 switch (create->cr_type) {
621 case NF4LNK:
ca364317
BF		 622 status = nfsd_symlink(rqstp, &cstate->current_fh,
623 create->cr_name, create->cr_namelen,
1e444f5b 624 create->cr_data, &resfh);
1da177e4
LT		 625 break;
626
627 case NF4BLK:
628 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
629 if (MAJOR(rdev) != create->cr_specdata1 ||
630 MINOR(rdev) != create->cr_specdata2)
631 return nfserr_inval;
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:
638 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
639 if (MAJOR(rdev) != create->cr_specdata1 ||
640 MINOR(rdev) != create->cr_specdata2)
641 return nfserr_inval;
ca364317
BF		 642 status = nfsd_create(rqstp, &cstate->current_fh,
643 create->cr_name, create->cr_namelen,
644 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 645 break;
646
647 case NF4SOCK:
ca364317
BF		 648 status = nfsd_create(rqstp, &cstate->current_fh,
649 create->cr_name, create->cr_namelen,
650 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 651 break;
652
653 case NF4FIFO:
ca364317
BF		 654 status = nfsd_create(rqstp, &cstate->current_fh,
655 create->cr_name, create->cr_namelen,
656 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 657 break;
658
659 case NF4DIR:
660 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 661 status = nfsd_create(rqstp, &cstate->current_fh,
662 create->cr_name, create->cr_namelen,
663 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 664 break;
665
666 default:
667 status = nfserr_badtype;
668 }
669
9208faf2
YZ		 670 if (status)
671 goto out;
1da177e4 672
18032ca0
DQ		 673 if (create->cr_label.len)
674 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
675
9208faf2
YZ		 676 if (create->cr_acl != NULL)
677 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
678 create->cr_bmval);
679
680 fh_unlock(&cstate->current_fh);
681 set_change_info(&create->cr_cinfo, &cstate->current_fh);
682 fh_dup2(&cstate->current_fh, &resfh);
683out:
1da177e4
LT		 684 fh_put(&resfh);
685 return status;
686}
687
7191155b 688static __be32
ca364317
BF		 689nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
690 struct nfsd4_getattr *getattr)
1da177e4 691{
b37ad28b 692 __be32 status;
1da177e4 693
8837abca 694 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 695 if (status)
696 return status;
697
698 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
699 return nfserr_inval;
700
7e705706
AA		 701 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
702 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
703 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
1da177e4 704
ca364317 705 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 706 return nfs_ok;
707}
708
7191155b 709static __be32
ca364317
BF		 710nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
711 struct nfsd4_link *link)
1da177e4 712{
b37ad28b 713 __be32 status = nfserr_nofilehandle;
1da177e4 714
ca364317 715 if (!cstate->save_fh.fh_dentry)
1da177e4 716 return status;
ca364317
BF		 717 status = nfsd_link(rqstp, &cstate->current_fh,
718 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 719 if (!status)
ca364317 720 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 721 return status;
722}
723
0ff7ab46 724static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 725{
726 struct svc_fh tmp_fh;
b37ad28b 727 __be32 ret;
1da177e4
LT		 728
729 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 730 ret = exp_pseudoroot(rqstp, &tmp_fh);
731 if (ret)
1da177e4 732 return ret;
0ff7ab46 733 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 734 fh_put(&tmp_fh);
735 return nfserr_noent;
736 }
737 fh_put(&tmp_fh);
0ff7ab46
BF		 738 return nfsd_lookup(rqstp, fh, "..", 2, fh);
739}
740
741static __be32
742nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
743 void *arg)
744{
745 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 746}
747
7191155b 748static __be32
ca364317
BF		 749nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
750 struct nfsd4_lookup *lookup)
1da177e4 751{
ca364317
BF		 752 return nfsd_lookup(rqstp, &cstate->current_fh,
753 lookup->lo_name, lookup->lo_len,
754 &cstate->current_fh);
1da177e4
LT		 755}
756
7191155b 757static __be32
ca364317
BF		 758nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
759 struct nfsd4_read *read)
1da177e4 760{
b37ad28b 761 __be32 status;
1da177e4
LT		 762
763 /* no need to check permission - this will be done in nfsd_read() */
764
7e06b7f9 765 read->rd_filp = NULL;
1da177e4
LT		 766 if (read->rd_offset >= OFFSET_MAX)
767 return nfserr_inval;
768
9b3234b9
BF		 769 /*
770 * If we do a zero copy read, then a client will see read data
771 * that reflects the state of the file *after* performing the
772 * following compound.
773 *
774 * To ensure proper ordering, we therefore turn off zero copy if
775 * the client wants us to do more in this compound:
776 */
777 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 778 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 779
1da177e4 780 /* check stateid */
5ccb0066
SK		 781 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
782 cstate, &read->rd_stateid,
dd453dfd 783 RD_STATE, &read->rd_filp))) {
1da177e4
LT		 784 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
785 goto out;
786 }
787 status = nfs_ok;
788out:
1da177e4 789 read->rd_rqstp = rqstp;
ca364317 790 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 791 return status;
792}
793
7191155b 794static __be32
ca364317
BF		 795nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
796 struct nfsd4_readdir *readdir)
1da177e4
LT		 797{
798 u64 cookie = readdir->rd_cookie;
799 static const nfs4_verifier zeroverf;
800
801 /* no need to check permission - this will be done in nfsd_readdir() */
802
803 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
804 return nfserr_inval;
805
7e705706
AA		 806 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion);
807 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion);
808 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion);
1da177e4 809
832023bf 810 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 811 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
812 return nfserr_bad_cookie;
813
814 readdir->rd_rqstp = rqstp;
ca364317 815 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 816 return nfs_ok;
817}
818
7191155b 819static __be32
ca364317
BF		 820nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
821 struct nfsd4_readlink *readlink)
1da177e4
LT		 822{
823 readlink->rl_rqstp = rqstp;
ca364317 824 readlink->rl_fhp = &cstate->current_fh;
1da177e4
LT		 825 return nfs_ok;
826}
827
7191155b 828static __be32
ca364317
BF		 829nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
830 struct nfsd4_remove *remove)
1da177e4 831{
b37ad28b 832 __be32 status;
1da177e4 833
5ccb0066 834 if (locks_in_grace(SVC_NET(rqstp)))
c815afc7 835 return nfserr_grace;
ca364317
BF		 836 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
837 remove->rm_name, remove->rm_namelen);
1da177e4 838 if (!status) {
ca364317
BF		 839 fh_unlock(&cstate->current_fh);
840 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 841 }
842 return status;
843}
844
7191155b 845static __be32
ca364317
BF		 846nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
847 struct nfsd4_rename *rename)
1da177e4 848{
b37ad28b 849 __be32 status = nfserr_nofilehandle;
1da177e4 850
ca364317 851 if (!cstate->save_fh.fh_dentry)
1da177e4 852 return status;
5ccb0066
SK		 853 if (locks_in_grace(SVC_NET(rqstp)) &&
854 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
c815afc7 855 return nfserr_grace;
ca364317
BF		 856 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
857 rename->rn_snamelen, &cstate->current_fh,
1da177e4 858 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 859 if (status)
860 return status;
861 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
862 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
863 return nfs_ok;
1da177e4
LT		 864}
865
dcb488a3
AA		 866static __be32
867nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
868 struct nfsd4_secinfo *secinfo)
869{
870 struct svc_fh resfh;
871 struct svc_export *exp;
872 struct dentry *dentry;
873 __be32 err;
874
875 fh_init(&resfh, NFS4_FHSIZE);
29a78a3e
BF		 876 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
877 if (err)
878 return err;
dcb488a3
AA		 879 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
880 secinfo->si_name, secinfo->si_namelen,
881 &exp, &dentry);
882 if (err)
883 return err;
2b0143b5 884 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 885 exp_put(exp);
886 err = nfserr_noent;
887 } else
888 secinfo->si_exp = exp;
889 dput(dentry);
56560b9a
BF		 890 if (cstate->minorversion)
891 /* See rfc 5661 section 2.6.3.1.1.8 */
892 fh_put(&cstate->current_fh);
dcb488a3
AA		 893 return err;
894}
895
04f4ad16
BF		 896static __be32
897nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
898 struct nfsd4_secinfo_no_name *sin)
899{
900 __be32 err;
901
902 switch (sin->sin_style) {
903 case NFS4_SECINFO_STYLE4_CURRENT_FH:
904 break;
905 case NFS4_SECINFO_STYLE4_PARENT:
906 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
907 if (err)
908 return err;
909 break;
910 default:
911 return nfserr_inval;
912 }
bf18f163
KM		 913
914 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 915 fh_put(&cstate->current_fh);
916 return nfs_ok;
917}
918
7191155b 919static __be32
ca364317
BF		 920nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
921 struct nfsd4_setattr *setattr)
1da177e4 922{
b37ad28b 923 __be32 status = nfs_ok;
96f6f985 924 int err;
1da177e4 925
1da177e4 926 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
5ccb0066 927 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
6150ef0d 928 &setattr->sa_stateid, WR_STATE, NULL);
375c5547 929 if (status) {
3e3b4800 930 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 931 return status;
932 }
1da177e4 933 }
96f6f985
AV		 934 err = fh_want_write(&cstate->current_fh);
935 if (err)
936 return nfserrno(err);
1da177e4 937 status = nfs_ok;
3c8e0316
YZ		 938
939 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
940 nfsd_attrmask);
941 if (status)
942 goto out;
943
1da177e4 944 if (setattr->sa_acl != NULL)
ca364317
BF		 945 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
946 setattr->sa_acl);
1da177e4 947 if (status)
18f335af 948 goto out;
18032ca0
DQ		 949 if (setattr->sa_label.len)
950 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
951 &setattr->sa_label);
952 if (status)
953 goto out;
ca364317 954 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 955 0, (time_t)0);
18f335af 956out:
bad0dcff 957 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 958 return status;
959}
960
ffe1137b
BF		 961static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
962{
963 int i = 1;
964 int buflen = write->wr_buflen;
965
966 vec[0].iov_base = write->wr_head.iov_base;
967 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
968 buflen -= vec[0].iov_len;
969
970 while (buflen) {
971 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
972 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
973 buflen -= vec[i].iov_len;
974 i++;
975 }
976 return i;
977}
978
7191155b 979static __be32
ca364317
BF		 980nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
981 struct nfsd4_write *write)
1da177e4
LT		 982{
983 stateid_t *stateid = &write->wr_stateid;
984 struct file *filp = NULL;
b37ad28b 985 __be32 status = nfs_ok;
31dec253 986 unsigned long cnt;
ffe1137b 987 int nvecs;
1da177e4
LT		 988
989 /* no need to check permission - this will be done in nfsd_write() */
990
991 if (write->wr_offset >= OFFSET_MAX)
992 return nfserr_inval;
993
5ccb0066
SK		 994 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp),
995 cstate, stateid, WR_STATE, &filp);
375c5547
BF		 996 if (status) {
997 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
998 return status;
999 }
1000
31dec253 1001 cnt = write->wr_buflen;
1da177e4 1002 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1003 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1004
ffe1137b
BF		 1005 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1006 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1007
ca364317 1008 status = nfsd_write(rqstp, &cstate->current_fh, filp,
ffe1137b 1009 write->wr_offset, rqstp->rq_vec, nvecs,
31dec253 1010 &cnt, &write->wr_how_written);
7e06b7f9
N		 1011 if (filp)
1012 fput(filp);
1da177e4 1013
31dec253
DS		 1014 write->wr_bytes_written = cnt;
1015
1da177e4 1016 return status;
1da177e4
LT		 1017}
1018
95d871f0
AS		 1019static __be32
1020nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1021 struct nfsd4_fallocate *fallocate, int flags)
1022{
1023 __be32 status = nfserr_notsupp;
1024 struct file *file;
1025
1026 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
1027 &fallocate->falloc_stateid,
1028 WR_STATE, &file);
1029 if (status != nfs_ok) {
1030 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1031 return status;
1032 }
1033
1034 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1035 fallocate->falloc_offset,
1036 fallocate->falloc_length,
1037 flags);
1038 fput(file);
1039 return status;
1040}
1041
1042static __be32
1043nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1044 struct nfsd4_fallocate *fallocate)
1045{
1046 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1047}
1048
b0cb9085
AS		 1049static __be32
1050nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1051 struct nfsd4_fallocate *fallocate)
1052{
1053 return nfsd4_fallocate(rqstp, cstate, fallocate,
1054 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1055}
1056
24bab491
AS		 1057static __be32
1058nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1059 struct nfsd4_seek *seek)
1060{
1061 int whence;
1062 __be32 status;
1063 struct file *file;
1064
1065 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate,
1066 &seek->seek_stateid,
1067 RD_STATE, &file);
1068 if (status) {
1069 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1070 return status;
1071 }
1072
1073 switch (seek->seek_whence) {
1074 case NFS4_CONTENT_DATA:
1075 whence = SEEK_DATA;
1076 break;
1077 case NFS4_CONTENT_HOLE:
1078 whence = SEEK_HOLE;
1079 break;
1080 default:
1081 status = nfserr_union_notsupp;
1082 goto out;
1083 }
1084
1085 /*
1086 * Note: This call does change file->f_pos, but nothing in NFSD
1087 * should ever file->f_pos.
1088 */
1089 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1090 if (seek->seek_pos < 0)
1091 status = nfserrno(seek->seek_pos);
1092 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1093 seek->seek_eof = true;
1094
1095out:
1096 fput(file);
1097 return status;
1098}
1099
1da177e4
LT		 1100/* This routine never returns NFS_OK! If there are no other errors, it
1101 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1102 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1103 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1104 */
b37ad28b 1105static __be32
c954e2a5 1106_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1107 struct nfsd4_verify *verify)
1da177e4 1108{
2ebbc012 1109 __be32 *buf, *p;
1da177e4 1110 int count;
b37ad28b 1111 __be32 status;
1da177e4 1112
8837abca 1113 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1114 if (status)
1115 return status;
1116
3c8e0316
YZ		 1117 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1118 if (status)
1119 return status;
1120
1da177e4
LT		 1121 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1122 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1123 return nfserr_inval;
1124 if (verify->ve_attrlen & 3)
1125 return nfserr_inval;
1126
1127 /* count in words:
1128 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1129 */
1130 count = 4 + (verify->ve_attrlen >> 2);
1131 buf = kmalloc(count << 2, GFP_KERNEL);
1132 if (!buf)
3e772463 1133 return nfserr_jukebox;
1da177e4 1134
84822d0b 1135 p = buf;
d5184658 1136 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1137 cstate->current_fh.fh_export,
d5184658
BF		 1138 cstate->current_fh.fh_dentry,
1139 verify->ve_bmval,
406a7ea9 1140 rqstp, 0);
41ae6e71
BF		 1141 /*
1142 * If nfsd4_encode_fattr() ran out of space, assume that's because
1143 * the attributes are longer (hence different) than those given:
1144 */
84822d0b 1145 if (status == nfserr_resource)
1da177e4
LT		 1146 status = nfserr_not_same;
1147 if (status)
1148 goto out_kfree;
1149
95ec28cd
BH		 1150 /* skip bitmap */
1151 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1152 status = nfserr_not_same;
1153 if (ntohl(*p++) != verify->ve_attrlen)
1154 goto out_kfree;
1155 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1156 status = nfserr_same;
1157
1158out_kfree:
1159 kfree(buf);
1160 return status;
1161}
1162
c954e2a5
BF		 1163static __be32
1164nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1165 struct nfsd4_verify *verify)
1166{
1167 __be32 status;
1168
1169 status = _nfsd4_verify(rqstp, cstate, verify);
1170 return status == nfserr_not_same ? nfs_ok : status;
1171}
1172
1173static __be32
1174nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1175 struct nfsd4_verify *verify)
1176{
1177 __be32 status;
1178
1179 status = _nfsd4_verify(rqstp, cstate, verify);
1180 return status == nfserr_same ? nfs_ok : status;
1181}
1182
9cf514cc
CH		 1183#ifdef CONFIG_NFSD_PNFS
1184static const struct nfsd4_layout_ops *
1185nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1186{
1187 if (!exp->ex_layout_type) {
1188 dprintk("%s: export does not support pNFS\n", __func__);
1189 return NULL;
1190 }
1191
1192 if (exp->ex_layout_type != layout_type) {
1193 dprintk("%s: layout type %d not supported\n",
1194 __func__, layout_type);
1195 return NULL;
1196 }
1197
1198 return nfsd4_layout_ops[layout_type];
1199}
1200
1201static __be32
1202nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1203 struct nfsd4_compound_state *cstate,
1204 struct nfsd4_getdeviceinfo *gdp)
1205{
1206 const struct nfsd4_layout_ops *ops;
1207 struct nfsd4_deviceid_map *map;
1208 struct svc_export *exp;
1209 __be32 nfserr;
1210
1211 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1212 __func__,
1213 gdp->gd_layout_type,
1214 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1215 gdp->gd_maxcount);
1216
1217 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1218 if (!map) {
1219 dprintk("%s: couldn't find device ID to export mapping!\n",
1220 __func__);
1221 return nfserr_noent;
1222 }
1223
1224 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1225 if (IS_ERR(exp)) {
1226 dprintk("%s: could not find device id\n", __func__);
1227 return nfserr_noent;
1228 }
1229
1230 nfserr = nfserr_layoutunavailable;
1231 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1232 if (!ops)
1233 goto out;
1234
1235 nfserr = nfs_ok;
1236 if (gdp->gd_maxcount != 0)
1237 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp);
1238
1239 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1240out:
a1420384 1241 exp_put(exp);
9cf514cc
CH		 1242 return nfserr;
1243}
1244
1245static __be32
1246nfsd4_layoutget(struct svc_rqst *rqstp,
1247 struct nfsd4_compound_state *cstate,
1248 struct nfsd4_layoutget *lgp)
1249{
1250 struct svc_fh *current_fh = &cstate->current_fh;
1251 const struct nfsd4_layout_ops *ops;
1252 struct nfs4_layout_stateid *ls;
1253 __be32 nfserr;
1254 int accmode;
1255
1256 switch (lgp->lg_seg.iomode) {
1257 case IOMODE_READ:
1258 accmode = NFSD_MAY_READ;
1259 break;
1260 case IOMODE_RW:
1261 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1262 break;
1263 default:
1264 dprintk("%s: invalid iomode %d\n",
1265 __func__, lgp->lg_seg.iomode);
1266 nfserr = nfserr_badiomode;
1267 goto out;
1268 }
1269
1270 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1271 if (nfserr)
1272 goto out;
1273
1274 nfserr = nfserr_layoutunavailable;
1275 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1276 if (!ops)
1277 goto out;
1278
1279 /*
1280 * Verify minlength and range as per RFC5661:
1281 * o If loga_length is less than loga_minlength,
1282 * the metadata server MUST return NFS4ERR_INVAL.
1283 * o If the sum of loga_offset and loga_minlength exceeds
1284 * NFS4_UINT64_MAX, and loga_minlength is not
1285 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1286 * o If the sum of loga_offset and loga_length exceeds
1287 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1288 * the error NFS4ERR_INVAL MUST result.
1289 */
1290 nfserr = nfserr_inval;
1291 if (lgp->lg_seg.length < lgp->lg_minlength ||
1292 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1293 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1294 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1295 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1296 goto out;
1297 if (lgp->lg_seg.length == 0)
1298 goto out;
1299
1300 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1301 true, lgp->lg_layout_type, &ls);
31ef83dc
CH		 1302 if (nfserr) {
1303 trace_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1304 goto out;
31ef83dc 1305 }
9cf514cc 1306
c5c707f9
CH		 1307 nfserr = nfserr_recallconflict;
1308 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1309 goto out_put_stid;
1310
2b0143b5 1311 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1312 current_fh, lgp);
1313 if (nfserr)
1314 goto out_put_stid;
1315
1316 nfserr = nfsd4_insert_layout(lgp, ls);
1317
1318out_put_stid:
1319 nfs4_put_stid(&ls->ls_stid);
1320out:
1321 return nfserr;
1322}
1323
1324static __be32
1325nfsd4_layoutcommit(struct svc_rqst *rqstp,
1326 struct nfsd4_compound_state *cstate,
1327 struct nfsd4_layoutcommit *lcp)
1328{
1329 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1330 struct svc_fh *current_fh = &cstate->current_fh;
1331 const struct nfsd4_layout_ops *ops;
1332 loff_t new_size = lcp->lc_last_wr + 1;
1333 struct inode *inode;
1334 struct nfs4_layout_stateid *ls;
1335 __be32 nfserr;
1336
1337 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1338 if (nfserr)
1339 goto out;
1340
1341 nfserr = nfserr_layoutunavailable;
1342 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1343 if (!ops)
1344 goto out;
2b0143b5 1345 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1346
1347 nfserr = nfserr_inval;
1348 if (new_size <= seg->offset) {
1349 dprintk("pnfsd: last write before layout segment\n");
1350 goto out;
1351 }
1352 if (new_size > seg->offset + seg->length) {
1353 dprintk("pnfsd: last write beyond layout segment\n");
1354 goto out;
1355 }
1356 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1357 dprintk("pnfsd: layoutcommit beyond EOF\n");
1358 goto out;
1359 }
1360
1361 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1362 false, lcp->lc_layout_type,
1363 &ls);
1364 if (nfserr) {
31ef83dc 1365 trace_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1366 /* fixup error code as per RFC5661 */
1367 if (nfserr == nfserr_bad_stateid)
1368 nfserr = nfserr_badlayout;
1369 goto out;
1370 }
1371
1372 nfserr = ops->proc_layoutcommit(inode, lcp);
1373 if (nfserr)
1374 goto out_put_stid;
1375
1376 if (new_size > i_size_read(inode)) {
1377 lcp->lc_size_chg = 1;
1378 lcp->lc_newsize = new_size;
1379 } else {
1380 lcp->lc_size_chg = 0;
1381 }
1382
1383out_put_stid:
1384 nfs4_put_stid(&ls->ls_stid);
1385out:
1386 return nfserr;
1387}
1388
1389static __be32
1390nfsd4_layoutreturn(struct svc_rqst *rqstp,
1391 struct nfsd4_compound_state *cstate,
1392 struct nfsd4_layoutreturn *lrp)
1393{
1394 struct svc_fh *current_fh = &cstate->current_fh;
1395 __be32 nfserr;
1396
1397 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1398 if (nfserr)
1399 goto out;
1400
1401 nfserr = nfserr_layoutunavailable;
1402 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1403 goto out;
1404
1405 switch (lrp->lr_seg.iomode) {
1406 case IOMODE_READ:
1407 case IOMODE_RW:
1408 case IOMODE_ANY:
1409 break;
1410 default:
1411 dprintk("%s: invalid iomode %d\n", __func__,
1412 lrp->lr_seg.iomode);
1413 nfserr = nfserr_inval;
1414 goto out;
1415 }
1416
1417 switch (lrp->lr_return_type) {
1418 case RETURN_FILE:
1419 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1420 break;
1421 case RETURN_FSID:
1422 case RETURN_ALL:
1423 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1424 break;
1425 default:
1426 dprintk("%s: invalid return_type %d\n", __func__,
1427 lrp->lr_return_type);
1428 nfserr = nfserr_inval;
1429 break;
1430 }
1431out:
1432 return nfserr;
1433}
1434#endif /* CONFIG_NFSD_PNFS */
1435
1da177e4
LT		 1436/*
1437 * NULL call.
1438 */
7111c66e 1439static __be32
1da177e4
LT		 1440nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp)
1441{
1442 return nfs_ok;
1443}
1444
e2b20950
SA		 1445static inline void nfsd4_increment_op_stats(u32 opnum)
1446{
1447 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1448 nfsdstats.nfs4_opcount[opnum]++;
1449}
1450
b591480b
BF		 1451typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1452 void *);
58e7b33a 1453typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
8b70484c
TM		 1454typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1455typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
58e7b33a 1456
f9bb94c4
AA		 1457enum nfsd4_op_flags {
1458 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
5ece3caf
MJ		 1459 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1460 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
68d93184
BF		 1461 /* For rfc 5661 section 2.6.3.1.1: */
1462 OP_HANDLES_WRONGSEC = 1 << 3,
1463 OP_IS_PUTFH_LIKE = 1 << 4,
1091006c 1464 /*
c856694e
BF		 1465 * These are the ops whose result size we estimate before
1466 * encoding, to avoid performing an op then not being able to
1467 * respond or cache a response. This includes writes and setattrs
1468 * as well as the operations usually called "nonidempotent":
1469 */
1470 OP_MODIFIES_SOMETHING = 1 << 5,
1471 /*
1472 * Cache compounds containing these ops in the xid-based drc:
1091006c
BF		 1473 * We use the DRC for compounds containing non-idempotent
1474 * operations, *except* those that are 4.1-specific (since
1475 * sessions provide their own EOS), and except for stateful
1476 * operations other than setclientid and setclientid_confirm
1477 * (since sequence numbers provide EOS for open, lock, etc in
1478 * the v4.0 case).
1479 */
c856694e 1480 OP_CACHEME = 1 << 6,
8b70484c
TM		 1481 /*
1482 * These are ops which clear current state id.
1483 */
1484 OP_CLEAR_STATEID = 1 << 7,
c856694e
BF		 1485};
1486
1487struct nfsd4_operation {
1488 nfsd4op_func op_func;
1489 u32 op_flags;
1490 char *op_name;
58e7b33a
MJ		 1491 /* Try to get response size before operation */
1492 nfsd4op_rsize op_rsize_bop;
24ff99c6
BS		 1493 stateid_getter op_get_currentstateid;
1494 stateid_setter op_set_currentstateid;
b591480b
BF		 1495};
1496
1497static struct nfsd4_operation nfsd4_ops[];
1498
f1c7f79b 1499static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1500
f9bb94c4 1501/*
57716355 1502 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1503 *
57716355
BF		 1504 * Also note, enforced elsewhere:
1505 * - SEQUENCE other than as first op results in
1506 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1507 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1508 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1509 * - DESTROY_SESSION must be the final operation in a compound, if
1510 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1511 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1512 */
57716355 1513static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1514{
57716355
BF		 1515 struct nfsd4_op *op = &args->ops[0];
1516
1517 /* These ordering requirements don't apply to NFSv4.0: */
1518 if (args->minorversion == 0)
1519 return nfs_ok;
1520 /* This is weird, but OK, not our problem: */
1521 if (args->opcnt == 0)
1522 return nfs_ok;
1523 if (op->status == nfserr_op_illegal)
1524 return nfs_ok;
1525 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1526 return nfserr_op_not_in_session;
1527 if (op->opnum == OP_SEQUENCE)
1528 return nfs_ok;
1529 if (args->opcnt != 1)
1530 return nfserr_not_only_op;
1531 return nfs_ok;
f9bb94c4
AA		 1532}
1533
22b03214
BF		 1534static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1535{
1536 return &nfsd4_ops[op->opnum];
1537}
1538
1091006c
BF		 1539bool nfsd4_cache_this_op(struct nfsd4_op *op)
1540{
e372ba60
BF		 1541 if (op->opnum == OP_ILLEGAL)
1542 return false;
c856694e 1543 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1544}
1545
68d93184
BF		 1546static bool need_wrongsec_check(struct svc_rqst *rqstp)
1547{
1548 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1549 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1550 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1551 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1552 struct nfsd4_operation *thisd;
1553 struct nfsd4_operation *nextd;
1554
1555 thisd = OPDESC(this);
1556 /*
1557 * Most ops check wronsec on our own; only the putfh-like ops
1558 * have special rules.
1559 */
1560 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1561 return false;
1562 /*
1563 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1564 * put-filehandle operation if we're not going to use the
1565 * result:
1566 */
1567 if (argp->opcnt == resp->opcnt)
1568 return false;
51904b08
BF		 1569 if (next->opnum == OP_ILLEGAL)
1570 return false;
68d93184
BF		 1571 nextd = OPDESC(next);
1572 /*
1573 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1574 * errors themselves as necessary; others should check for them
1575 * now:
1576 */
1577 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1578}
1579
2d124dfa
BF		 1580static void svcxdr_init_encode(struct svc_rqst *rqstp,
1581 struct nfsd4_compoundres *resp)
1582{
1583 struct xdr_stream *xdr = &resp->xdr;
1584 struct xdr_buf *buf = &rqstp->rq_res;
1585 struct kvec *head = buf->head;
1586
1587 xdr->buf = buf;
ddd1ea56 1588 xdr->iov = head;
2d124dfa 1589 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1590 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1591 /* Tail and page_len should be zero at this point: */
1592 buf->len = buf->head[0].iov_len;
2825a7f9 1593 xdr->scratch.iov_len = 0;
05638dc7 1594 xdr->page_ptr = buf->pages - 1;
2825a7f9 1595 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1596 - rqstp->rq_auth_slack;
2d124dfa
BF		 1597}
1598
1da177e4
LT		 1599/*
1600 * COMPOUND call.
1601 */
7111c66e 1602static __be32
1da177e4
LT		 1603nfsd4_proc_compound(struct svc_rqst *rqstp,
1604 struct nfsd4_compoundargs *args,
1605 struct nfsd4_compoundres *resp)
1606{
1607 struct nfsd4_op *op;
b591480b 1608 struct nfsd4_operation *opdesc;
e354d571 1609 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1610 struct svc_fh *current_fh = &cstate->current_fh;
1611 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1612 __be32 status;
1da177e4 1613
2d124dfa 1614 svcxdr_init_encode(rqstp, resp);
4aea24b2 1615 resp->tagp = resp->xdr.p;
1da177e4 1616 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1617 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1618 resp->taglen = args->taglen;
1619 resp->tag = args->tag;
1da177e4 1620 resp->rqstp = rqstp;
4daeed25 1621 cstate->minorversion = args->minorversion;
4daeed25
KM		 1622 fh_init(current_fh, NFS4_FHSIZE);
1623 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1624 /*
1625 * Don't use the deferral mechanism for NFSv4; compounds make it
1626 * too hard to avoid non-idempotency problems.
1627 */
30660e04 1628 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1629
1630 /*
1631 * According to RFC3010, this takes precedence over all other errors.
1632 */
1633 status = nfserr_minor_vers_mismatch;
35f7a14f 1634 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4
LT		 1635 goto out;
1636
57716355
BF		 1637 status = nfs41_check_op_ordering(args);
1638 if (status) {
f9bb94c4 1639 op = &args->ops[0];
57716355 1640 op->status = status;
f9bb94c4
AA		 1641 goto encode_op;
1642 }
1643
1da177e4
LT		 1644 while (!status && resp->opcnt < args->opcnt) {
1645 op = &args->ops[resp->opcnt++];
1646
b001a1b6
BH		 1647 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1648 resp->opcnt, args->opcnt, op->opnum,
1649 nfsd4_op_name(op->opnum));
1da177e4
LT		 1650 /*
1651 * The XDR decode routines may have pre-set op->status;
1652 * for example, if there is a miscellaneous XDR error
1653 * it will be set to nfserr_bad_xdr.
1654 */
9d313b17
BF		 1655 if (op->status) {
1656 if (op->opnum == OP_OPEN)
1657 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1658 goto encode_op;
9d313b17 1659 }
1da177e4 1660
22b03214 1661 opdesc = OPDESC(op);
b591480b 1662
4daeed25 1663 if (!current_fh->fh_dentry) {
27d630ec 1664 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1665 op->status = nfserr_nofilehandle;
1666 goto encode_op;
1667 }
4daeed25 1668 } else if (current_fh->fh_export->ex_fslocs.migrated &&
eeac294e 1669 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1670 op->status = nfserr_moved;
1da177e4
LT		 1671 goto encode_op;
1672 }
b591480b 1673
2336745e
KM		 1674 fh_clear_wcc(current_fh);
1675
58e7b33a
MJ		 1676 /* If op is non-idempotent */
1677 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1678 /*
a8095f7e
BF		 1679 * Don't execute this op if we couldn't encode a
1680 * succesful reply:
1681 */
1682 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1683 /*
1684 * Plus if there's another operation, make sure
4c69d585
BF		 1685 * we'll have space to at least encode an error:
1686 */
1687 if (resp->opcnt < args->opcnt)
1688 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1689 op->status = nfsd4_check_resp_size(resp, plen);
1690 }
1691
1692 if (op->status)
1693 goto encode_op;
1694
b600de7a
BF		 1695 if (opdesc->op_get_currentstateid)
1696 opdesc->op_get_currentstateid(cstate, &op->u);
1697 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1698
8b70484c
TM		 1699 if (!op->status) {
1700 if (opdesc->op_set_currentstateid)
1701 opdesc->op_set_currentstateid(cstate, &op->u);
1702
1703 if (opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1704 clear_current_stateid(cstate);
8b70484c
TM		 1705
1706 if (need_wrongsec_check(rqstp))
4daeed25 1707 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1708 }
68d93184 1709
1da177e4 1710encode_op:
49557cc7 1711 /* Only from SEQUENCE */
4daeed25 1712 if (cstate->status == nfserr_replay_cache) {
da3846a2 1713 dprintk("%s NFS4.1 replay from cache\n", __func__);
abfabf8c 1714 status = op->status;
da3846a2
AA		 1715 goto out;
1716 }
a90b061c 1717 if (op->status == nfserr_replay_me) {
a4f1706a 1718 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1719 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1720 status = op->status = op->replay->rp_status;
1721 } else {
1722 nfsd4_encode_operation(resp, op);
1723 status = op->status;
1724 }
0407717d
BH		 1725
1726 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1727 args->ops, args->opcnt, resp->opcnt, op->opnum,
1728 be32_to_cpu(status));
1729
58fb12e6 1730 nfsd4_cstate_clear_replay(cstate);
7e06b7f9
N		 1731 /* XXX Ugh, we need to get rid of this kind of special case: */
1732 if (op->opnum == OP_READ && op->u.read.rd_filp)
1733 fput(op->u.read.rd_filp);
e2b20950
SA		 1734
1735 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1736 }
1737
4daeed25
KM		 1738 cstate->status = status;
1739 fh_put(current_fh);
1740 fh_put(save_fh);
1741 BUG_ON(cstate->replay_owner);
1da177e4 1742out:
2f425878 1743 /* Reset deferral mechanism for RPC deferrals */
30660e04 1744 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1745 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1746 return status;
1747}
1748
58e7b33a
MJ		 1749#define op_encode_hdr_size (2)
1750#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1751#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1752#define op_encode_change_info_maxsz (5)
1753#define nfs4_fattr_bitmap_maxsz (4)
1754
8c7424cf
BF		 1755/* We'll fall back on returning no lockowner if run out of space: */
1756#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1757#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1758
1759#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1760
1761#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1762#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1763 op_encode_ace_maxsz)
1764
1765#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1766
1767static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1768{
1769 return (op_encode_hdr_size) * sizeof(__be32);
1770}
1771
1772static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1773{
1774 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1775}
1776
1777static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1778{
1779 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1780}
1781
1782static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1783{
1784 return (op_encode_hdr_size + op_encode_change_info_maxsz
1785 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1786}
1787
b86cef60
BF		 1788/*
1789 * Note since this is an idempotent operation we won't insist on failing
1790 * the op prematurely if the estimate is too large. We may turn off splice
1791 * reads unnecessarily.
1792 */
1793static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1794 struct nfsd4_op *op)
1795{
1796 u32 *bmap = op->u.getattr.ga_bmval;
1797 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1798 u32 ret = 0;
1799
1800 if (bmap0 & FATTR4_WORD0_ACL)
1801 return svc_max_payload(rqstp);
1802 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1803 return svc_max_payload(rqstp);
1804
1805 if (bmap1 & FATTR4_WORD1_OWNER) {
1806 ret += IDMAP_NAMESZ + 4;
1807 bmap1 &= ~FATTR4_WORD1_OWNER;
1808 }
1809 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1810 ret += IDMAP_NAMESZ + 4;
1811 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1812 }
1813 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1814 ret += NFS4_FHSIZE + 4;
1815 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1816 }
1817 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1818 ret += NFSD4_MAX_SEC_LABEL_LEN + 12;
1819 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1820 }
1821 /*
1822 * Largest of remaining attributes are 16 bytes (e.g.,
1823 * supported_attributes)
1824 */
1825 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1826 /* bitmask, length */
1827 ret += 20;
1828 return ret;
1829}
1830
58e7b33a
MJ		 1831static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1832{
1833 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1834 * sizeof(__be32);
1835}
1836
1837static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1838{
1839 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1840 * sizeof(__be32);
1841}
1842
1843static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1844{
1845 return (op_encode_hdr_size + op_encode_stateid_maxsz
1846 + op_encode_change_info_maxsz + 1
1847 + nfs4_fattr_bitmap_maxsz
1848 + op_encode_delegation_maxsz) * sizeof(__be32);
1849}
1850
1851static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1852{
1853 u32 maxcount = 0, rlen = 0;
1854
1855 maxcount = svc_max_payload(rqstp);
3c7aa15d 1856 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1857
622f560e 1858 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1859}
1860
1861static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1862{
3c7aa15d 1863 u32 maxcount = 0, rlen = 0;
58e7b33a 1864
3c7aa15d
KM		 1865 maxcount = svc_max_payload(rqstp);
1866 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1867
561f0ed4
BF		 1868 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1869 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1870}
1871
1872static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1873{
1874 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1875 * sizeof(__be32);
1876}
1877
1878static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1879{
1880 return (op_encode_hdr_size + op_encode_change_info_maxsz
1881 + op_encode_change_info_maxsz) * sizeof(__be32);
1882}
1883
ccae70a9
BF		 1884static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1885 struct nfsd4_op *op)
1886{
d1d84c96
BF		 1887 return (op_encode_hdr_size
1888 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1889}
1890
58e7b33a
MJ		 1891static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1892{
1893 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1894}
1895
1896static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1897{
480efaee
BF		 1898 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1899 sizeof(__be32);
58e7b33a
MJ		 1900}
1901
1902static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1903{
f34e432b 1904 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 1905}
1906
1907static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1908{
1909 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 1910 1 + 1 + /* eir_flags, spr_how */\
1911 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 1912 2 + /*eir_server_owner.so_minor_id */\
1913 /* eir_server_owner.so_major_id<> */\
1914 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1915 /* eir_server_scope<> */\
1916 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
1917 1 + /* eir_server_impl_id array length */\
1918 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
1919}
1920
1921static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1922{
1923 return (op_encode_hdr_size + \
1924 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
1925 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
1926}
1927
1928static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1929{
1930 return (op_encode_hdr_size + \
1931 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
1932 2 + /* csr_sequence, csr_flags */\
1933 op_encode_channel_attrs_maxsz + \
1934 op_encode_channel_attrs_maxsz) * sizeof(__be32);
1935}
1936
9cf514cc
CH		 1937#ifdef CONFIG_NFSD_PNFS
1938/*
1939 * At this stage we don't really know what layout driver will handle the request,
1940 * so we need to define an arbitrary upper bound here.
1941 */
1942#define MAX_LAYOUT_SIZE 128
1943static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1944{
1945 return (op_encode_hdr_size +
1946 1 /* logr_return_on_close */ +
1947 op_encode_stateid_maxsz +
1948 1 /* nr of layouts */ +
1949 MAX_LAYOUT_SIZE) * sizeof(__be32);
1950}
1951
1952static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1953{
1954 return (op_encode_hdr_size +
1955 1 /* locr_newsize */ +
1956 2 /* ns_size */) * sizeof(__be32);
1957}
1958
1959static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1960{
1961 return (op_encode_hdr_size +
1962 1 /* lrs_stateid */ +
1963 op_encode_stateid_maxsz) * sizeof(__be32);
1964}
1965#endif /* CONFIG_NFSD_PNFS */
1966
20766016 1967static struct nfsd4_operation nfsd4_ops[] = {
b591480b
BF		 1968 [OP_ACCESS] = {
1969 .op_func = (nfsd4op_func)nfsd4_access,
b001a1b6 1970 .op_name = "OP_ACCESS",
b591480b
BF		 1971 },
1972 [OP_CLOSE] = {
1973 .op_func = (nfsd4op_func)nfsd4_close,
58e7b33a 1974 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 1975 .op_name = "OP_CLOSE",
58e7b33a 1976 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
8b70484c
TM		 1977 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
1978 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
b591480b
BF		 1979 },
1980 [OP_COMMIT] = {
1981 .op_func = (nfsd4op_func)nfsd4_commit,
58e7b33a 1982 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 1983 .op_name = "OP_COMMIT",
58e7b33a 1984 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
b591480b
BF		 1985 },
1986 [OP_CREATE] = {
1987 .op_func = (nfsd4op_func)nfsd4_create,
d1471053 1988 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 1989 .op_name = "OP_CREATE",
58e7b33a 1990 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
b591480b
BF		 1991 },
1992 [OP_DELEGRETURN] = {
1993 .op_func = (nfsd4op_func)nfsd4_delegreturn,
58e7b33a 1994 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 1995 .op_name = "OP_DELEGRETURN",
58e7b33a 1996 .op_rsize_bop = nfsd4_only_status_rsize,
9428fe1a 1997 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
b591480b
BF		 1998 },
1999 [OP_GETATTR] = {
2000 .op_func = (nfsd4op_func)nfsd4_getattr,
eeac294e 2001 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2002 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2003 .op_name = "OP_GETATTR",
b591480b
BF		 2004 },
2005 [OP_GETFH] = {
2006 .op_func = (nfsd4op_func)nfsd4_getfh,
b001a1b6 2007 .op_name = "OP_GETFH",
b591480b
BF		 2008 },
2009 [OP_LINK] = {
2010 .op_func = (nfsd4op_func)nfsd4_link,
c856694e
BF		 2011 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2012 | OP_CACHEME,
b001a1b6 2013 .op_name = "OP_LINK",
58e7b33a 2014 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
b591480b
BF		 2015 },
2016 [OP_LOCK] = {
2017 .op_func = (nfsd4op_func)nfsd4_lock,
58e7b33a 2018 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2019 .op_name = "OP_LOCK",
58e7b33a 2020 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
62cd4a59 2021 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
b591480b
BF		 2022 },
2023 [OP_LOCKT] = {
2024 .op_func = (nfsd4op_func)nfsd4_lockt,
b001a1b6 2025 .op_name = "OP_LOCKT",
b591480b
BF		 2026 },
2027 [OP_LOCKU] = {
2028 .op_func = (nfsd4op_func)nfsd4_locku,
58e7b33a 2029 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2030 .op_name = "OP_LOCKU",
58e7b33a 2031 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
62cd4a59 2032 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
b591480b
BF		 2033 },
2034 [OP_LOOKUP] = {
2035 .op_func = (nfsd4op_func)nfsd4_lookup,
d1471053 2036 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2037 .op_name = "OP_LOOKUP",
b591480b
BF		 2038 },
2039 [OP_LOOKUPP] = {
2040 .op_func = (nfsd4op_func)nfsd4_lookupp,
d1471053 2041 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2042 .op_name = "OP_LOOKUPP",
b591480b
BF		 2043 },
2044 [OP_NVERIFY] = {
2045 .op_func = (nfsd4op_func)nfsd4_nverify,
b001a1b6 2046 .op_name = "OP_NVERIFY",
b591480b
BF		 2047 },
2048 [OP_OPEN] = {
2049 .op_func = (nfsd4op_func)nfsd4_open,
58e7b33a 2050 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2051 .op_name = "OP_OPEN",
58e7b33a 2052 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
8b70484c 2053 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
b591480b
BF		 2054 },
2055 [OP_OPEN_CONFIRM] = {
2056 .op_func = (nfsd4op_func)nfsd4_open_confirm,
58e7b33a 2057 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2058 .op_name = "OP_OPEN_CONFIRM",
58e7b33a 2059 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
b591480b
BF		 2060 },
2061 [OP_OPEN_DOWNGRADE] = {
2062 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
58e7b33a 2063 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2064 .op_name = "OP_OPEN_DOWNGRADE",
58e7b33a 2065 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
9428fe1a
TM		 2066 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2067 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
b591480b
BF		 2068 },
2069 [OP_PUTFH] = {
2070 .op_func = (nfsd4op_func)nfsd4_putfh,
68d93184 2071 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2072 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2073 .op_name = "OP_PUTFH",
58e7b33a 2074 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2075 },
eeac294e 2076 [OP_PUTPUBFH] = {
a1c8c4d1 2077 .op_func = (nfsd4op_func)nfsd4_putrootfh,
68d93184 2078 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2079 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2080 .op_name = "OP_PUTPUBFH",
58e7b33a 2081 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
eeac294e 2082 },
b591480b
BF		 2083 [OP_PUTROOTFH] = {
2084 .op_func = (nfsd4op_func)nfsd4_putrootfh,
68d93184 2085 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2086 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2087 .op_name = "OP_PUTROOTFH",
58e7b33a 2088 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2089 },
2090 [OP_READ] = {
2091 .op_func = (nfsd4op_func)nfsd4_read,
b001a1b6 2092 .op_name = "OP_READ",
58e7b33a 2093 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
30813e27 2094 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
b591480b
BF		 2095 },
2096 [OP_READDIR] = {
2097 .op_func = (nfsd4op_func)nfsd4_readdir,
b001a1b6 2098 .op_name = "OP_READDIR",
58e7b33a 2099 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
b591480b
BF		 2100 },
2101 [OP_READLINK] = {
2102 .op_func = (nfsd4op_func)nfsd4_readlink,
b001a1b6 2103 .op_name = "OP_READLINK",
b591480b
BF		 2104 },
2105 [OP_REMOVE] = {
2106 .op_func = (nfsd4op_func)nfsd4_remove,
c856694e 2107 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2108 .op_name = "OP_REMOVE",
58e7b33a 2109 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
b591480b
BF		 2110 },
2111 [OP_RENAME] = {
2112 .op_func = (nfsd4op_func)nfsd4_rename,
c856694e 2113 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2114 .op_name = "OP_RENAME",
58e7b33a 2115 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
b591480b
BF		 2116 },
2117 [OP_RENEW] = {
2118 .op_func = (nfsd4op_func)nfsd4_renew,
58e7b33a
MJ		 2119 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2120 | OP_MODIFIES_SOMETHING,
b001a1b6 2121 .op_name = "OP_RENEW",
58e7b33a
MJ		 2122 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2123
b591480b
BF		 2124 },
2125 [OP_RESTOREFH] = {
2126 .op_func = (nfsd4op_func)nfsd4_restorefh,
68d93184 2127 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2128 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2129 .op_name = "OP_RESTOREFH",
58e7b33a 2130 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2131 },
2132 [OP_SAVEFH] = {
2133 .op_func = (nfsd4op_func)nfsd4_savefh,
58e7b33a 2134 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2135 .op_name = "OP_SAVEFH",
58e7b33a 2136 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2137 },
dcb488a3
AA		 2138 [OP_SECINFO] = {
2139 .op_func = (nfsd4op_func)nfsd4_secinfo,
68d93184 2140 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2141 .op_name = "OP_SECINFO",
dcb488a3 2142 },
b591480b
BF		 2143 [OP_SETATTR] = {
2144 .op_func = (nfsd4op_func)nfsd4_setattr,
b001a1b6 2145 .op_name = "OP_SETATTR",
c856694e 2146 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2147 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1e97b519 2148 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
b591480b
BF		 2149 },
2150 [OP_SETCLIENTID] = {
2151 .op_func = (nfsd4op_func)nfsd4_setclientid,
58e7b33a 2152 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2153 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2154 .op_name = "OP_SETCLIENTID",
58e7b33a 2155 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
b591480b
BF		 2156 },
2157 [OP_SETCLIENTID_CONFIRM] = {
2158 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
58e7b33a 2159 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2160 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2161 .op_name = "OP_SETCLIENTID_CONFIRM",
58e7b33a 2162 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2163 },
2164 [OP_VERIFY] = {
2165 .op_func = (nfsd4op_func)nfsd4_verify,
b001a1b6 2166 .op_name = "OP_VERIFY",
b591480b
BF		 2167 },
2168 [OP_WRITE] = {
2169 .op_func = (nfsd4op_func)nfsd4_write,
c856694e 2170 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2171 .op_name = "OP_WRITE",
58e7b33a 2172 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
30813e27 2173 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
b591480b
BF		 2174 },
2175 [OP_RELEASE_LOCKOWNER] = {
2176 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
58e7b33a
MJ		 2177 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2178 | OP_MODIFIES_SOMETHING,
b001a1b6 2179 .op_name = "OP_RELEASE_LOCKOWNER",
58e7b33a 2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2181 },
069b6ad4
AA		 2182
2183 /* NFSv4.1 operations */
2184 [OP_EXCHANGE_ID] = {
2185 .op_func = (nfsd4op_func)nfsd4_exchange_id,
58e7b33a
MJ		 2186 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2187 | OP_MODIFIES_SOMETHING,
069b6ad4 2188 .op_name = "OP_EXCHANGE_ID",
58e7b33a 2189 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
069b6ad4 2190 },
cb73a9f4
BF		 2191 [OP_BACKCHANNEL_CTL] = {
2192 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2193 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2194 .op_name = "OP_BACKCHANNEL_CTL",
2195 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2196 },
1d1bc8f2
BF		 2197 [OP_BIND_CONN_TO_SESSION] = {
2198 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2199 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2200 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2201 .op_name = "OP_BIND_CONN_TO_SESSION",
58e7b33a 2202 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2203 },
069b6ad4
AA		 2204 [OP_CREATE_SESSION] = {
2205 .op_func = (nfsd4op_func)nfsd4_create_session,
58e7b33a
MJ		 2206 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2207 | OP_MODIFIES_SOMETHING,
069b6ad4 2208 .op_name = "OP_CREATE_SESSION",
58e7b33a 2209 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
069b6ad4
AA		 2210 },
2211 [OP_DESTROY_SESSION] = {
2212 .op_func = (nfsd4op_func)nfsd4_destroy_session,
58e7b33a
MJ		 2213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2214 | OP_MODIFIES_SOMETHING,
069b6ad4 2215 .op_name = "OP_DESTROY_SESSION",
58e7b33a 2216 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
069b6ad4
AA		 2217 },
2218 [OP_SEQUENCE] = {
2219 .op_func = (nfsd4op_func)nfsd4_sequence,
f9bb94c4 2220 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2221 .op_name = "OP_SEQUENCE",
d1d84c96 2222 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
069b6ad4 2223 },
094b5d74 2224 [OP_DESTROY_CLIENTID] = {
345c2842 2225 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
58e7b33a
MJ		 2226 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2227 | OP_MODIFIES_SOMETHING,
094b5d74 2228 .op_name = "OP_DESTROY_CLIENTID",
58e7b33a 2229 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
094b5d74 2230 },
4dc6ec00
BF		 2231 [OP_RECLAIM_COMPLETE] = {
2232 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
58e7b33a 2233 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2234 .op_name = "OP_RECLAIM_COMPLETE",
58e7b33a 2235 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
4dc6ec00 2236 },
04f4ad16
BF		 2237 [OP_SECINFO_NO_NAME] = {
2238 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
68d93184 2239 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16
BF		 2240 .op_name = "OP_SECINFO_NO_NAME",
2241 },
17456804
BS		 2242 [OP_TEST_STATEID] = {
2243 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2244 .op_flags = ALLOWED_WITHOUT_FH,
2245 .op_name = "OP_TEST_STATEID",
2246 },
e1ca12df
BS		 2247 [OP_FREE_STATEID] = {
2248 .op_func = (nfsd4op_func)nfsd4_free_stateid,
58e7b33a 2249 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2250 .op_name = "OP_FREE_STATEID",
a1dc6955 2251 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
58e7b33a 2252 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
e1ca12df 2253 },
9cf514cc
CH		 2254#ifdef CONFIG_NFSD_PNFS
2255 [OP_GETDEVICEINFO] = {
2256 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2257 .op_flags = ALLOWED_WITHOUT_FH,
2258 .op_name = "OP_GETDEVICEINFO",
2259 },
2260 [OP_LAYOUTGET] = {
2261 .op_func = (nfsd4op_func)nfsd4_layoutget,
2262 .op_flags = OP_MODIFIES_SOMETHING,
2263 .op_name = "OP_LAYOUTGET",
2264 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2265 },
2266 [OP_LAYOUTCOMMIT] = {
2267 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2268 .op_flags = OP_MODIFIES_SOMETHING,
2269 .op_name = "OP_LAYOUTCOMMIT",
2270 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2271 },
2272 [OP_LAYOUTRETURN] = {
2273 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2274 .op_flags = OP_MODIFIES_SOMETHING,
2275 .op_name = "OP_LAYOUTRETURN",
2276 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2277 },
2278#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2279
2280 /* NFSv4.2 operations */
95d871f0
AS		 2281 [OP_ALLOCATE] = {
2282 .op_func = (nfsd4op_func)nfsd4_allocate,
2283 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2284 .op_name = "OP_ALLOCATE",
2285 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
2286 },
b0cb9085
AS		 2287 [OP_DEALLOCATE] = {
2288 .op_func = (nfsd4op_func)nfsd4_deallocate,
2289 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2290 .op_name = "OP_DEALLOCATE",
2291 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
2292 },
24bab491
AS		 2293 [OP_SEEK] = {
2294 .op_func = (nfsd4op_func)nfsd4_seek,
2295 .op_name = "OP_SEEK",
2296 },
b591480b
BF		 2297};
2298
4f0cefbf
BF		 2299int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2300{
2301 struct nfsd4_operation *opdesc;
2302 nfsd4op_rsize estimator;
2303
2304 if (op->opnum == OP_ILLEGAL)
2305 return op_encode_hdr_size * sizeof(__be32);
2306 opdesc = OPDESC(op);
2307 estimator = opdesc->op_rsize_bop;
2308 return estimator ? estimator(rqstp, op) : PAGE_SIZE;
2309}
2310
07d1f802
BF		 2311void warn_on_nonidempotent_op(struct nfsd4_op *op)
2312{
2313 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2314 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2315 op->opnum, nfsd4_op_name(op->opnum));
2316 WARN_ON_ONCE(1);
2317 }
2318}
2319
f1c7f79b 2320static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2321{
2322 if (opnum < ARRAY_SIZE(nfsd4_ops))
2323 return nfsd4_ops[opnum].op_name;
2324 return "unknown_operation";
2325}
2326
1da177e4 2327#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2328struct nfsd4_voidargs { int dummy; };
2329
1da177e4 2330static struct svc_procedure nfsd_procedures4[2] = {
0a93a47f
YZ		 2331 [NFSPROC4_NULL] = {
2332 .pc_func = (svc_procfunc) nfsd4_proc_null,
2333 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres,
2334 .pc_argsize = sizeof(struct nfsd4_voidargs),
2335 .pc_ressize = sizeof(struct nfsd4_voidres),
2336 .pc_cachetype = RC_NOCACHE,
2337 .pc_xdrressize = 1,
2338 },
2339 [NFSPROC4_COMPOUND] = {
2340 .pc_func = (svc_procfunc) nfsd4_proc_compound,
2341 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs,
2342 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres,
2343 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2344 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2345 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2346 .pc_cachetype = RC_NOCACHE,
2347 .pc_xdrressize = NFSD_BUFSIZE/4,
2348 },
1da177e4
LT		 2349};
2350
2351struct svc_version nfsd_version4 = {
2352 .vs_vers = 4,
2353 .vs_nproc = 2,
2354 .vs_proc = nfsd_procedures4,
2355 .vs_dispatch = nfsd_dispatch,
2356 .vs_xdrsize = NFS4_SVC_XDRSIZE,
7e55b59b 2357 .vs_rpcb_optnl = 1,
1da177e4
LT		 2358};
2359
2360/*
2361 * Local variables:
2362 * c-basic-offset: 8
2363 * End:
2364 */
Linux 6.x block layer and io_uring tree(s)