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fsnotify: Protect bail out path of fsnotify_add_mark_locked() properly
[mirror_ubuntu-bionic-kernel.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
5955102c 58 inode_lock(inode);
18032ca0
DQ		 59 status = security_inode_setsecctx(resfh->fh_dentry,
60 label->data, label->len);
5955102c 61 inode_unlock(inode);
18032ca0
DQ		 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;
32ddd944 98 struct svc_export *exp = cstate->current_fh.fh_export;
3c8e0316 99
916d2d84 100 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
3c8e0316 101 return nfserr_attrnotsupp;
916d2d84
BF		 102 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
103 return nfserr_attrnotsupp;
32ddd944
BF		 104 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
105 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
106 return nfserr_attrnotsupp;
916d2d84
BF		 107 if (writable && !bmval_is_subset(bmval, writable))
108 return nfserr_inval;
47057abd
AG		 109 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
110 (bmval[1] & FATTR4_WORD1_MODE))
111 return nfserr_inval;
3c8e0316
YZ		 112 return nfs_ok;
113}
114
115static __be32
116nfsd4_check_open_attributes(struct svc_rqst *rqstp,
117 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
118{
119 __be32 status = nfs_ok;
120
121 if (open->op_create == NFS4_OPEN_CREATE) {
122 if (open->op_createmode == NFS4_CREATE_UNCHECKED
123 || open->op_createmode == NFS4_CREATE_GUARDED)
124 status = check_attr_support(rqstp, cstate,
125 open->op_bmval, nfsd_attrmask);
126 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
127 status = check_attr_support(rqstp, cstate,
128 open->op_bmval, nfsd41_ex_attrmask);
129 }
130
131 return status;
132}
133
9208faf2
YZ		 134static int
135is_create_with_attrs(struct nfsd4_open *open)
136{
137 return open->op_create == NFS4_OPEN_CREATE
138 && (open->op_createmode == NFS4_CREATE_UNCHECKED
139 || open->op_createmode == NFS4_CREATE_GUARDED
140 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
141}
142
143/*
144 * if error occurs when setting the acl, just clear the acl bit
145 * in the returned attr bitmap.
146 */
147static void
148do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
149 struct nfs4_acl *acl, u32 *bmval)
150{
151 __be32 status;
152
153 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
154 if (status)
155 /*
156 * We should probably fail the whole open at this point,
157 * but we've already created the file, so it's too late;
158 * So this seems the least of evils:
159 */
160 bmval[0] &= ~FATTR4_WORD0_ACL;
161}
162
1da177e4
LT		 163static inline void
164fh_dup2(struct svc_fh *dst, struct svc_fh *src)
165{
166 fh_put(dst);
167 dget(src->fh_dentry);
168 if (src->fh_export)
bf18f163 169 exp_get(src->fh_export);
1da177e4
LT		 170 *dst = *src;
171}
172
b37ad28b 173static __be32
dc730e17 174do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
1da177e4 175{
b37ad28b 176 __be32 status;
1da177e4
LT		 177
178 if (open->op_truncate &&
179 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
180 return nfserr_inval;
181
a043226b
BF		 182 accmode |= NFSD_MAY_READ_IF_EXEC;
183
1da177e4 184 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
8837abca 185 accmode |= NFSD_MAY_READ;
9801d8a3 186 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
8837abca 187 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
57ecb34f 188 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
8837abca 189 accmode |= NFSD_MAY_WRITE;
1da177e4
LT		 190
191 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
192
193 return status;
194}
195
aadab6c6
BF		 196static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
197{
2b0143b5 198 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
aadab6c6
BF		 199
200 if (S_ISREG(mode))
201 return nfs_ok;
202 if (S_ISDIR(mode))
203 return nfserr_isdir;
204 /*
205 * Using err_symlink as our catch-all case may look odd; but
206 * there's no other obvious error for this case in 4.0, and we
207 * happen to know that it will cause the linux v4 client to do
208 * the right thing on attempts to open something other than a
209 * regular file.
210 */
211 return nfserr_symlink;
212}
213
bbc9c36c
BF		 214static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
215{
216 if (nfsd4_has_session(cstate))
217 return;
218 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
219 &resfh->fh_handle);
220}
221
b37ad28b 222static __be32
c0e6bee4 223do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
1da177e4 224{
bbc9c36c 225 struct svc_fh *current_fh = &cstate->current_fh;
7007c90f 226 int accmode;
b37ad28b 227 __be32 status;
1da177e4 228
c0e6bee4
BF		 229 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
230 if (!*resfh)
59deeb9e 231 return nfserr_jukebox;
c0e6bee4 232 fh_init(*resfh, NFS4_FHSIZE);
1da177e4
LT		 233 open->op_truncate = 0;
234
235 if (open->op_create) {
79fb54ab
BH		 236 /* FIXME: check session persistence and pnfs flags.
237 * The nfsv4.1 spec requires the following semantics:
238 *
239 * Persistent | pNFS | Server REQUIRED | Client Allowed
240 * Reply Cache | server | |
241 * -------------+--------+-----------------+--------------------
242 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
243 * | | | (SHOULD)
244 * | | and EXCLUSIVE4 | or EXCLUSIVE4
245 * | | | (SHOULD NOT)
246 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
247 * yes | no | GUARDED4 | GUARDED4
248 * yes | yes | GUARDED4 | GUARDED4
249 */
250
1da177e4
LT		 251 /*
252 * Note: create modes (UNCHECKED,GUARDED...) are the same
ac6721a1 253 * in NFSv4 as in v3 except EXCLUSIVE4_1.
1da177e4 254 */
ac6721a1 255 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
1da177e4 256 open->op_fname.len, &open->op_iattr,
c0e6bee4 257 *resfh, open->op_createmode,
749997e5 258 (u32 *)open->op_verf.data,
856121b2 259 &open->op_truncate, &open->op_created);
749997e5 260
18032ca0 261 if (!status && open->op_label.len)
c0e6bee4 262 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
18032ca0 263
99f88726 264 /*
ead8fb8c
KM		 265 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
266 * use the returned bitmask to indicate which attributes
267 * we used to store the verifier:
749997e5 268 */
ead8fb8c
KM		 269 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
270 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
271 FATTR4_WORD1_TIME_MODIFY);
4335723e
BF		 272 } else
273 /*
274 * Note this may exit with the parent still locked.
275 * We will hold the lock until nfsd4_open's final
276 * lookup, to prevent renames or unlinks until we've had
277 * a chance to an acquire a delegation if appropriate.
278 */
1da177e4 279 status = nfsd_lookup(rqstp, current_fh,
c0e6bee4 280 open->op_fname.data, open->op_fname.len, *resfh);
9dc4e6c4
BF		 281 if (status)
282 goto out;
c0e6bee4 283 status = nfsd_check_obj_isreg(*resfh);
af85852d
BF		 284 if (status)
285 goto out;
1da177e4 286
9208faf2 287 if (is_create_with_attrs(open) && open->op_acl != NULL)
c0e6bee4 288 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
9208faf2 289
c0e6bee4 290 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
7007c90f 291 accmode = NFSD_MAY_NOP;
89f6c336
BF		 292 if (open->op_created ||
293 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
7007c90f 294 accmode |= NFSD_MAY_OWNER_OVERRIDE;
c0e6bee4 295 status = do_open_permission(rqstp, *resfh, open, accmode);
41fd1e42 296 set_change_info(&open->op_cinfo, current_fh);
af85852d 297out:
1da177e4
LT		 298 return status;
299}
300
b37ad28b 301static __be32
bbc9c36c 302do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
1da177e4 303{
bbc9c36c 304 struct svc_fh *current_fh = &cstate->current_fh;
b37ad28b 305 __be32 status;
9f415eb2 306 int accmode = 0;
1da177e4 307
1da177e4
LT		 308 /* We don't know the target directory, and therefore can not
309 * set the change info
310 */
311
312 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
313
bbc9c36c 314 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
1da177e4
LT		 315
316 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
317 (open->op_iattr.ia_size == 0);
9f415eb2
BF		 318 /*
319 * In the delegation case, the client is telling us about an
320 * open that it *already* performed locally, some time ago. We
321 * should let it succeed now if possible.
322 *
323 * In the case of a CLAIM_FH open, on the other hand, the client
324 * may be counting on us to enforce permissions (the Linux 4.1
325 * client uses this for normal opens, for example).
326 */
327 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
328 accmode = NFSD_MAY_OWNER_OVERRIDE;
1da177e4 329
9f415eb2 330 status = do_open_permission(rqstp, current_fh, open, accmode);
1da177e4
LT		 331
332 return status;
333}
334
60adfc50
AA		 335static void
336copy_clientid(clientid_t *clid, struct nfsd4_session *session)
337{
338 struct nfsd4_sessionid *sid =
339 (struct nfsd4_sessionid *)session->se_sessionid.data;
340
341 clid->cl_boot = sid->clientid.cl_boot;
342 clid->cl_id = sid->clientid.cl_id;
343}
1da177e4 344
7191155b 345static __be32
ca364317 346nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 347 union nfsd4_op_u *u)
1da177e4 348{
eb69853d 349 struct nfsd4_open *open = &u->open;
b37ad28b 350 __be32 status;
c0e6bee4 351 struct svc_fh *resfh = NULL;
3320fef1
SK		 352 struct net *net = SVC_NET(rqstp);
353 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6668958f 354
fe0750e5 355 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 356 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 357 open->op_openowner);
1da177e4 358
1da177e4
LT		 359 /* This check required by spec. */
360 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
361 return nfserr_inval;
362
856121b2 363 open->op_created = 0;
ab1350b2
MJ		 364 /*
365 * RFC5661 18.51.3
366 * Before RECLAIM_COMPLETE done, server should deny new lock
367 */
368 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 369 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
370 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 371 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
372 return nfserr_grace;
373
60adfc50
AA		 374 if (nfsd4_has_session(cstate))
375 copy_clientid(&open->op_clientid, cstate->session);
376
1da177e4 377 /* check seqid for replay. set nfs4_owner */
6cd22668 378 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 379 if (status == nfserr_replay_me) {
fe0750e5 380 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 381 fh_put(&cstate->current_fh);
a4773c08
BF		 382 fh_copy_shallow(&cstate->current_fh.fh_handle,
383 &rp->rp_openfh);
8837abca 384 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 385 if (status)
386 dprintk("nfsd4_open: replay failed"
387 " restoring previous filehandle\n");
388 else
a90b061c 389 status = nfserr_replay_me;
1da177e4
LT		 390 }
391 if (status)
392 goto out;
9d313b17
BF		 393 if (open->op_xdr_error) {
394 status = open->op_xdr_error;
395 goto out;
396 }
fb553c0f 397
3c8e0316
YZ		 398 status = nfsd4_check_open_attributes(rqstp, cstate, open);
399 if (status)
400 goto out;
401
fb553c0f
BF		 402 /* Openowner is now set, so sequence id will get bumped. Now we need
403 * these checks before we do any creates: */
cbd0d51a 404 status = nfserr_grace;
c87fb4a3 405 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 406 goto out;
407 status = nfserr_no_grace;
c87fb4a3 408 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 409 goto out;
fb553c0f 410
1da177e4 411 switch (open->op_claim_type) {
0dd3c192 412 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 413 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 414 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 415 if (status)
416 goto out;
417 break;
418 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 419 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 420 cstate, nn);
0cf99b91
MJ		 421 if (status)
422 goto out;
ba5378b6 423 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
8b289b2c
BF		 424 case NFS4_OPEN_CLAIM_FH:
425 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 426 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 427 if (status)
428 goto out;
c0e6bee4 429 resfh = &cstate->current_fh;
1da177e4 430 break;
8b289b2c 431 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 432 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 433 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 434 open->op_claim_type);
435 status = nfserr_notsupp;
436 goto out;
437 default:
2fdada03 438 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 439 open->op_claim_type);
440 status = nfserr_inval;
441 goto out;
442 }
443 /*
444 * nfsd4_process_open2() does the actual opening of the file. If
445 * successful, it (1) truncates the file if open->op_truncate was
446 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
447 */
c0e6bee4 448 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 449 WARN(status && open->op_created,
450 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
451 be32_to_cpu(status));
1da177e4 452out:
c0e6bee4
BF		 453 if (resfh && resfh != &cstate->current_fh) {
454 fh_dup2(&cstate->current_fh, resfh);
455 fh_put(resfh);
456 kfree(resfh);
457 }
42297899 458 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 459 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 460 return status;
461}
462
9d313b17
BF		 463/*
464 * OPEN is the only seqid-mutating operation whose decoding can fail
465 * with a seqid-mutating error (specifically, decoding of user names in
466 * the attributes). Therefore we have to do some processing to look up
467 * the stateowner so that we can bump the seqid.
468 */
469static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
470{
eb69853d 471 struct nfsd4_open *open = &op->u.open;
9d313b17
BF		 472
473 if (!seqid_mutating_err(ntohl(op->status)))
474 return op->status;
475 if (nfsd4_has_session(cstate))
476 return op->status;
477 open->op_xdr_error = op->status;
eb69853d 478 return nfsd4_open(rqstp, cstate, &op->u);
9d313b17
BF		 479}
480
1da177e4
LT		 481/*
482 * filehandle-manipulating ops.
483 */
7191155b 484static __be32
b591480b 485nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 486 union nfsd4_op_u *u)
1da177e4 487{
ca364317 488 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 489 return nfserr_nofilehandle;
490
eb69853d 491 u->getfh = &cstate->current_fh;
1da177e4
LT		 492 return nfs_ok;
493}
494
7191155b 495static __be32
ca364317 496nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 497 union nfsd4_op_u *u)
1da177e4 498{
eb69853d
CH		 499 struct nfsd4_putfh *putfh = &u->putfh;
500
ca364317
BF		 501 fh_put(&cstate->current_fh);
502 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
503 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
504 putfh->pf_fhlen);
68d93184 505 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
1da177e4
LT		 506}
507
7191155b 508static __be32
b591480b 509nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 510 union nfsd4_op_u *u)
1da177e4 511{
b37ad28b 512 __be32 status;
1da177e4 513
ca364317 514 fh_put(&cstate->current_fh);
df547efb 515 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 516 return status;
517}
518
7191155b 519static __be32
b591480b 520nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 521 union nfsd4_op_u *u)
1da177e4 522{
ca364317 523 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 524 return nfserr_restorefh;
525
ca364317 526 fh_dup2(&cstate->current_fh, &cstate->save_fh);
37c593c5
TM		 527 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
528 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
529 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
530 }
1da177e4
LT		 531 return nfs_ok;
532}
533
7191155b 534static __be32
b591480b 535nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 536 union nfsd4_op_u *u)
1da177e4 537{
ca364317 538 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 539 return nfserr_nofilehandle;
540
ca364317 541 fh_dup2(&cstate->save_fh, &cstate->current_fh);
37c593c5
TM		 542 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
543 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
544 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
545 }
1da177e4
LT		 546 return nfs_ok;
547}
548
549/*
550 * misc nfsv4 ops
551 */
7191155b 552static __be32
ca364317 553nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 554 union nfsd4_op_u *u)
1da177e4 555{
eb69853d
CH		 556 struct nfsd4_access *access = &u->access;
557
1da177e4
LT		 558 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
559 return nfserr_inval;
560
561 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 562 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
563 &access->ac_supported);
1da177e4
LT		 564}
565
b9c0ef85 566static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1
CL		 567{
568 __be32 verf[2];
b9c0ef85 569 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
ab4684d1 570
f419992c
JL		 571 /*
572 * This is opaque to client, so no need to byte-swap. Use
573 * __force to keep sparse happy
574 */
575 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
576 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
ab4684d1
CL		 577 memcpy(verifier->data, verf, sizeof(verifier->data));
578}
579
7191155b 580static __be32
ca364317 581nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 582 union nfsd4_op_u *u)
1da177e4 583{
eb69853d
CH		 584 struct nfsd4_commit *commit = &u->commit;
585
b9c0ef85 586 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
75c096f7 587 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
ca364317 588 commit->co_count);
1da177e4
LT		 589}
590
b37ad28b 591static __be32
ca364317 592nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 593 union nfsd4_op_u *u)
1da177e4 594{
eb69853d 595 struct nfsd4_create *create = &u->create;
1da177e4 596 struct svc_fh resfh;
b37ad28b 597 __be32 status;
1da177e4
LT		 598 dev_t rdev;
599
600 fh_init(&resfh, NFS4_FHSIZE);
601
fa08139d 602 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 603 if (status)
604 return status;
605
3c8e0316
YZ		 606 status = check_attr_support(rqstp, cstate, create->cr_bmval,
607 nfsd_attrmask);
608 if (status)
609 return status;
610
1da177e4
LT		 611 switch (create->cr_type) {
612 case NF4LNK:
ca364317
BF		 613 status = nfsd_symlink(rqstp, &cstate->current_fh,
614 create->cr_name, create->cr_namelen,
1e444f5b 615 create->cr_data, &resfh);
1da177e4
LT		 616 break;
617
618 case NF4BLK:
619 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
620 if (MAJOR(rdev) != create->cr_specdata1 ||
621 MINOR(rdev) != create->cr_specdata2)
622 return nfserr_inval;
ca364317
BF		 623 status = nfsd_create(rqstp, &cstate->current_fh,
624 create->cr_name, create->cr_namelen,
625 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 626 break;
627
628 case NF4CHR:
629 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
630 if (MAJOR(rdev) != create->cr_specdata1 ||
631 MINOR(rdev) != create->cr_specdata2)
632 return nfserr_inval;
ca364317
BF		 633 status = nfsd_create(rqstp, &cstate->current_fh,
634 create->cr_name, create->cr_namelen,
635 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 636 break;
637
638 case NF4SOCK:
ca364317
BF		 639 status = nfsd_create(rqstp, &cstate->current_fh,
640 create->cr_name, create->cr_namelen,
641 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 642 break;
643
644 case NF4FIFO:
ca364317
BF		 645 status = nfsd_create(rqstp, &cstate->current_fh,
646 create->cr_name, create->cr_namelen,
647 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 648 break;
649
650 case NF4DIR:
651 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 652 status = nfsd_create(rqstp, &cstate->current_fh,
653 create->cr_name, create->cr_namelen,
654 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 655 break;
656
657 default:
658 status = nfserr_badtype;
659 }
660
9208faf2
YZ		 661 if (status)
662 goto out;
1da177e4 663
18032ca0
DQ		 664 if (create->cr_label.len)
665 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
666
9208faf2
YZ		 667 if (create->cr_acl != NULL)
668 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
669 create->cr_bmval);
670
671 fh_unlock(&cstate->current_fh);
672 set_change_info(&create->cr_cinfo, &cstate->current_fh);
673 fh_dup2(&cstate->current_fh, &resfh);
674out:
1da177e4
LT		 675 fh_put(&resfh);
676 return status;
677}
678
7191155b 679static __be32
ca364317 680nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 681 union nfsd4_op_u *u)
1da177e4 682{
eb69853d 683 struct nfsd4_getattr *getattr = &u->getattr;
b37ad28b 684 __be32 status;
1da177e4 685
8837abca 686 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 687 if (status)
688 return status;
689
690 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
691 return nfserr_inval;
692
916d2d84
BF		 693 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
694 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
695 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 696
ca364317 697 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 698 return nfs_ok;
699}
700
7191155b 701static __be32
ca364317 702nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 703 union nfsd4_op_u *u)
1da177e4 704{
eb69853d 705 struct nfsd4_link *link = &u->link;
b37ad28b 706 __be32 status = nfserr_nofilehandle;
1da177e4 707
ca364317 708 if (!cstate->save_fh.fh_dentry)
1da177e4 709 return status;
ca364317
BF		 710 status = nfsd_link(rqstp, &cstate->current_fh,
711 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 712 if (!status)
ca364317 713 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 714 return status;
715}
716
0ff7ab46 717static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 718{
719 struct svc_fh tmp_fh;
b37ad28b 720 __be32 ret;
1da177e4
LT		 721
722 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 723 ret = exp_pseudoroot(rqstp, &tmp_fh);
724 if (ret)
1da177e4 725 return ret;
0ff7ab46 726 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 727 fh_put(&tmp_fh);
728 return nfserr_noent;
729 }
730 fh_put(&tmp_fh);
0ff7ab46
BF		 731 return nfsd_lookup(rqstp, fh, "..", 2, fh);
732}
733
734static __be32
735nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 736 union nfsd4_op_u *u)
0ff7ab46
BF		 737{
738 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 739}
740
7191155b 741static __be32
ca364317 742nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 743 union nfsd4_op_u *u)
1da177e4 744{
ca364317 745 return nfsd_lookup(rqstp, &cstate->current_fh,
eb69853d 746 u->lookup.lo_name, u->lookup.lo_len,
ca364317 747 &cstate->current_fh);
1da177e4
LT		 748}
749
7191155b 750static __be32
ca364317 751nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 752 union nfsd4_op_u *u)
1da177e4 753{
eb69853d 754 struct nfsd4_read *read = &u->read;
b37ad28b 755 __be32 status;
1da177e4 756
7e06b7f9 757 read->rd_filp = NULL;
1da177e4
LT		 758 if (read->rd_offset >= OFFSET_MAX)
759 return nfserr_inval;
760
9b3234b9
BF		 761 /*
762 * If we do a zero copy read, then a client will see read data
763 * that reflects the state of the file *after* performing the
764 * following compound.
765 *
766 * To ensure proper ordering, we therefore turn off zero copy if
767 * the client wants us to do more in this compound:
768 */
769 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 770 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 771
1da177e4 772 /* check stateid */
aa0d6aed
AS		 773 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
774 &read->rd_stateid, RD_STATE,
775 &read->rd_filp, &read->rd_tmp_file);
af90f707 776 if (status) {
1da177e4
LT		 777 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
778 goto out;
779 }
780 status = nfs_ok;
781out:
1da177e4 782 read->rd_rqstp = rqstp;
ca364317 783 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 784 return status;
785}
786
34b1744c
BF		 787
788static void
789nfsd4_read_release(union nfsd4_op_u *u)
790{
791 if (u->read.rd_filp)
792 fput(u->read.rd_filp);
793}
794
7191155b 795static __be32
ca364317 796nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 797 union nfsd4_op_u *u)
1da177e4 798{
eb69853d 799 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 800 u64 cookie = readdir->rd_cookie;
801 static const nfs4_verifier zeroverf;
802
803 /* no need to check permission - this will be done in nfsd_readdir() */
804
805 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
806 return nfserr_inval;
807
916d2d84
BF		 808 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
809 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
810 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 811
832023bf 812 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 813 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
814 return nfserr_bad_cookie;
815
816 readdir->rd_rqstp = rqstp;
ca364317 817 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 818 return nfs_ok;
819}
820
7191155b 821static __be32
ca364317 822nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 823 union nfsd4_op_u *u)
1da177e4 824{
eb69853d
CH		 825 u->readlink.rl_rqstp = rqstp;
826 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 827 return nfs_ok;
828}
829
7191155b 830static __be32
ca364317 831nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 832 union nfsd4_op_u *u)
1da177e4 833{
eb69853d 834 struct nfsd4_remove *remove = &u->remove;
b37ad28b 835 __be32 status;
1da177e4 836
c87fb4a3 837 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 838 return nfserr_grace;
ca364317
BF		 839 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
840 remove->rm_name, remove->rm_namelen);
1da177e4 841 if (!status) {
ca364317
BF		 842 fh_unlock(&cstate->current_fh);
843 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 844 }
845 return status;
846}
847
7191155b 848static __be32
ca364317 849nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 850 union nfsd4_op_u *u)
1da177e4 851{
eb69853d 852 struct nfsd4_rename *rename = &u->rename;
b37ad28b 853 __be32 status = nfserr_nofilehandle;
1da177e4 854
ca364317 855 if (!cstate->save_fh.fh_dentry)
1da177e4 856 return status;
c87fb4a3 857 if (opens_in_grace(SVC_NET(rqstp)) &&
5ccb0066 858 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
c815afc7 859 return nfserr_grace;
ca364317
BF		 860 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
861 rename->rn_snamelen, &cstate->current_fh,
1da177e4 862 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 863 if (status)
864 return status;
865 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
866 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
867 return nfs_ok;
1da177e4
LT		 868}
869
dcb488a3
AA		 870static __be32
871nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 872 union nfsd4_op_u *u)
dcb488a3 873{
eb69853d 874 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 875 struct svc_export *exp;
876 struct dentry *dentry;
877 __be32 err;
878
29a78a3e
BF		 879 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
880 if (err)
881 return err;
dcb488a3
AA		 882 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
883 secinfo->si_name, secinfo->si_namelen,
884 &exp, &dentry);
885 if (err)
886 return err;
2f6fc056 887 fh_unlock(&cstate->current_fh);
2b0143b5 888 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 889 exp_put(exp);
890 err = nfserr_noent;
891 } else
892 secinfo->si_exp = exp;
893 dput(dentry);
56560b9a
BF		 894 if (cstate->minorversion)
895 /* See rfc 5661 section 2.6.3.1.1.8 */
896 fh_put(&cstate->current_fh);
dcb488a3
AA		 897 return err;
898}
899
04f4ad16
BF		 900static __be32
901nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 902 union nfsd4_op_u *u)
04f4ad16
BF		 903{
904 __be32 err;
905
eb69853d 906 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 907 case NFS4_SECINFO_STYLE4_CURRENT_FH:
908 break;
909 case NFS4_SECINFO_STYLE4_PARENT:
910 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
911 if (err)
912 return err;
913 break;
914 default:
915 return nfserr_inval;
916 }
bf18f163 917
eb69853d 918 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 919 fh_put(&cstate->current_fh);
920 return nfs_ok;
921}
922
34b1744c
BF		 923static void
924nfsd4_secinfo_release(union nfsd4_op_u *u)
925{
926 if (u->secinfo.si_exp)
927 exp_put(u->secinfo.si_exp);
928}
929
ec572b9e
EG		 930static void
931nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
932{
933 if (u->secinfo_no_name.sin_exp)
934 exp_put(u->secinfo_no_name.sin_exp);
935}
936
7191155b 937static __be32
ca364317 938nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 939 union nfsd4_op_u *u)
1da177e4 940{
eb69853d 941 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 942 __be32 status = nfs_ok;
96f6f985 943 int err;
1da177e4 944
1da177e4 945 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 946 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed
AS		 947 &cstate->current_fh, &setattr->sa_stateid,
948 WR_STATE, NULL, NULL);
375c5547 949 if (status) {
3e3b4800 950 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 951 return status;
952 }
1da177e4 953 }
96f6f985
AV		 954 err = fh_want_write(&cstate->current_fh);
955 if (err)
956 return nfserrno(err);
1da177e4 957 status = nfs_ok;
3c8e0316
YZ		 958
959 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
960 nfsd_attrmask);
961 if (status)
962 goto out;
963
1da177e4 964 if (setattr->sa_acl != NULL)
ca364317
BF		 965 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
966 setattr->sa_acl);
1da177e4 967 if (status)
18f335af 968 goto out;
18032ca0
DQ		 969 if (setattr->sa_label.len)
970 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
971 &setattr->sa_label);
972 if (status)
973 goto out;
ca364317 974 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 975 0, (time_t)0);
18f335af 976out:
bad0dcff 977 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 978 return status;
979}
980
ffe1137b
BF		 981static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
982{
983 int i = 1;
984 int buflen = write->wr_buflen;
985
986 vec[0].iov_base = write->wr_head.iov_base;
987 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
988 buflen -= vec[0].iov_len;
989
990 while (buflen) {
991 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
992 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
993 buflen -= vec[i].iov_len;
994 i++;
995 }
996 return i;
997}
998
7191155b 999static __be32
ca364317 1000nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1001 union nfsd4_op_u *u)
1da177e4 1002{
eb69853d 1003 struct nfsd4_write *write = &u->write;
1da177e4
LT		 1004 stateid_t *stateid = &write->wr_stateid;
1005 struct file *filp = NULL;
b37ad28b 1006 __be32 status = nfs_ok;
31dec253 1007 unsigned long cnt;
ffe1137b 1008 int nvecs;
1da177e4 1009
1da177e4
LT		 1010 if (write->wr_offset >= OFFSET_MAX)
1011 return nfserr_inval;
1012
aa0d6aed
AS		 1013 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1014 stateid, WR_STATE, &filp, NULL);
375c5547
BF		 1015 if (status) {
1016 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1017 return status;
1018 }
1019
31dec253 1020 cnt = write->wr_buflen;
1da177e4 1021 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1022 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1023
ffe1137b
BF		 1024 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1025 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1026
af90f707
CH		 1027 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1028 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 1029 write->wr_how_written);
af90f707 1030 fput(filp);
1da177e4 1031
31dec253
DS		 1032 write->wr_bytes_written = cnt;
1033
1da177e4 1034 return status;
1da177e4
LT		 1035}
1036
ffa0160a 1037static __be32
29ae7f9d
AS		 1038nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1039 stateid_t *src_stateid, struct file **src,
1040 stateid_t *dst_stateid, struct file **dst)
ffa0160a 1041{
ffa0160a
CH		 1042 __be32 status;
1043
1044 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
29ae7f9d 1045 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1046 if (status) {
1047 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1048 goto out;
1049 }
1050
1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
29ae7f9d 1052 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1053 if (status) {
1054 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1055 goto out_put_src;
1056 }
1057
1058 /* fix up for NFS-specific error code */
29ae7f9d
AS		 1059 if (!S_ISREG(file_inode(*src)->i_mode) ||
1060 !S_ISREG(file_inode(*dst)->i_mode)) {
ffa0160a
CH		 1061 status = nfserr_wrong_type;
1062 goto out_put_dst;
1063 }
1064
29ae7f9d
AS		 1065out:
1066 return status;
1067out_put_dst:
1068 fput(*dst);
1069out_put_src:
1070 fput(*src);
1071 goto out;
1072}
1073
1074static __be32
1075nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1076 union nfsd4_op_u *u)
29ae7f9d 1077{
eb69853d 1078 struct nfsd4_clone *clone = &u->clone;
29ae7f9d
AS		 1079 struct file *src, *dst;
1080 __be32 status;
1081
1082 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1083 &clone->cl_dst_stateid, &dst);
1084 if (status)
1085 goto out;
1086
ffa0160a
CH		 1087 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1088 dst, clone->cl_dst_pos, clone->cl_count);
1089
ffa0160a 1090 fput(dst);
ffa0160a
CH		 1091 fput(src);
1092out:
1093 return status;
1094}
1095
29ae7f9d
AS		 1096static __be32
1097nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1098 union nfsd4_op_u *u)
29ae7f9d 1099{
eb69853d 1100 struct nfsd4_copy *copy = &u->copy;
29ae7f9d
AS		 1101 struct file *src, *dst;
1102 __be32 status;
1103 ssize_t bytes;
1104
1105 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1106 &copy->cp_dst_stateid, &dst);
1107 if (status)
1108 goto out;
1109
1110 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1111 dst, copy->cp_dst_pos, copy->cp_count);
1112
1113 if (bytes < 0)
1114 status = nfserrno(bytes);
1115 else {
1116 copy->cp_res.wr_bytes_written = bytes;
1117 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1118 copy->cp_consecutive = 1;
1119 copy->cp_synchronous = 1;
1120 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1121 status = nfs_ok;
1122 }
1123
1124 fput(src);
1125 fput(dst);
1126out:
1127 return status;
1128}
1129
95d871f0
AS		 1130static __be32
1131nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1132 struct nfsd4_fallocate *fallocate, int flags)
1133{
1134 __be32 status = nfserr_notsupp;
1135 struct file *file;
1136
aa0d6aed 1137 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1138 &fallocate->falloc_stateid,
af90f707 1139 WR_STATE, &file, NULL);
95d871f0
AS		 1140 if (status != nfs_ok) {
1141 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1142 return status;
1143 }
1144
1145 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1146 fallocate->falloc_offset,
1147 fallocate->falloc_length,
1148 flags);
1149 fput(file);
1150 return status;
1151}
1152
1153static __be32
1154nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1155 union nfsd4_op_u *u)
95d871f0 1156{
eb69853d 1157 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1158}
1159
b0cb9085
AS		 1160static __be32
1161nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1162 union nfsd4_op_u *u)
b0cb9085 1163{
eb69853d 1164 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1165 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1166}
1167
24bab491
AS		 1168static __be32
1169nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1170 union nfsd4_op_u *u)
24bab491 1171{
eb69853d 1172 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1173 int whence;
1174 __be32 status;
1175 struct file *file;
1176
aa0d6aed 1177 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1178 &seek->seek_stateid,
af90f707 1179 RD_STATE, &file, NULL);
24bab491
AS		 1180 if (status) {
1181 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1182 return status;
1183 }
1184
1185 switch (seek->seek_whence) {
1186 case NFS4_CONTENT_DATA:
1187 whence = SEEK_DATA;
1188 break;
1189 case NFS4_CONTENT_HOLE:
1190 whence = SEEK_HOLE;
1191 break;
1192 default:
1193 status = nfserr_union_notsupp;
1194 goto out;
1195 }
1196
1197 /*
1198 * Note: This call does change file->f_pos, but nothing in NFSD
1199 * should ever file->f_pos.
1200 */
1201 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1202 if (seek->seek_pos < 0)
1203 status = nfserrno(seek->seek_pos);
1204 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1205 seek->seek_eof = true;
1206
1207out:
1208 fput(file);
1209 return status;
1210}
1211
1da177e4
LT		 1212/* This routine never returns NFS_OK! If there are no other errors, it
1213 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1214 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1215 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1216 */
b37ad28b 1217static __be32
c954e2a5 1218_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1219 struct nfsd4_verify *verify)
1da177e4 1220{
2ebbc012 1221 __be32 *buf, *p;
1da177e4 1222 int count;
b37ad28b 1223 __be32 status;
1da177e4 1224
8837abca 1225 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1226 if (status)
1227 return status;
1228
3c8e0316
YZ		 1229 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1230 if (status)
1231 return status;
1232
1da177e4
LT		 1233 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1234 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1235 return nfserr_inval;
1236 if (verify->ve_attrlen & 3)
1237 return nfserr_inval;
1238
1239 /* count in words:
1240 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1241 */
1242 count = 4 + (verify->ve_attrlen >> 2);
1243 buf = kmalloc(count << 2, GFP_KERNEL);
1244 if (!buf)
3e772463 1245 return nfserr_jukebox;
1da177e4 1246
84822d0b 1247 p = buf;
d5184658 1248 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1249 cstate->current_fh.fh_export,
d5184658
BF		 1250 cstate->current_fh.fh_dentry,
1251 verify->ve_bmval,
406a7ea9 1252 rqstp, 0);
41ae6e71
BF		 1253 /*
1254 * If nfsd4_encode_fattr() ran out of space, assume that's because
1255 * the attributes are longer (hence different) than those given:
1256 */
84822d0b 1257 if (status == nfserr_resource)
1da177e4
LT		 1258 status = nfserr_not_same;
1259 if (status)
1260 goto out_kfree;
1261
95ec28cd
BH		 1262 /* skip bitmap */
1263 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1264 status = nfserr_not_same;
1265 if (ntohl(*p++) != verify->ve_attrlen)
1266 goto out_kfree;
1267 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1268 status = nfserr_same;
1269
1270out_kfree:
1271 kfree(buf);
1272 return status;
1273}
1274
c954e2a5
BF		 1275static __be32
1276nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1277 union nfsd4_op_u *u)
c954e2a5
BF		 1278{
1279 __be32 status;
1280
eb69853d 1281 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1282 return status == nfserr_not_same ? nfs_ok : status;
1283}
1284
1285static __be32
1286nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1287 union nfsd4_op_u *u)
c954e2a5
BF		 1288{
1289 __be32 status;
1290
eb69853d 1291 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1292 return status == nfserr_same ? nfs_ok : status;
1293}
1294
9cf514cc
CH		 1295#ifdef CONFIG_NFSD_PNFS
1296static const struct nfsd4_layout_ops *
1297nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1298{
8a4c3926 1299 if (!exp->ex_layout_types) {
9cf514cc
CH		 1300 dprintk("%s: export does not support pNFS\n", __func__);
1301 return NULL;
1302 }
1303
b550a32e
AK		 1304 if (layout_type >= LAYOUT_TYPE_MAX ||
1305 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1306 dprintk("%s: layout type %d not supported\n",
1307 __func__, layout_type);
1308 return NULL;
1309 }
1310
1311 return nfsd4_layout_ops[layout_type];
1312}
1313
1314static __be32
1315nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1316 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1317{
eb69853d 1318 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1319 const struct nfsd4_layout_ops *ops;
1320 struct nfsd4_deviceid_map *map;
1321 struct svc_export *exp;
1322 __be32 nfserr;
1323
1324 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1325 __func__,
1326 gdp->gd_layout_type,
1327 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1328 gdp->gd_maxcount);
1329
1330 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1331 if (!map) {
1332 dprintk("%s: couldn't find device ID to export mapping!\n",
1333 __func__);
1334 return nfserr_noent;
1335 }
1336
1337 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1338 if (IS_ERR(exp)) {
1339 dprintk("%s: could not find device id\n", __func__);
1340 return nfserr_noent;
1341 }
1342
1343 nfserr = nfserr_layoutunavailable;
1344 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1345 if (!ops)
1346 goto out;
1347
1348 nfserr = nfs_ok;
f99d4fbd
CH		 1349 if (gdp->gd_maxcount != 0) {
1350 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1351 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1352 }
9cf514cc
CH		 1353
1354 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1355out:
a1420384 1356 exp_put(exp);
9cf514cc
CH		 1357 return nfserr;
1358}
1359
34b1744c
BF		 1360static void
1361nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1362{
1363 kfree(u->getdeviceinfo.gd_device);
1364}
1365
9cf514cc
CH		 1366static __be32
1367nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1368 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1369{
eb69853d 1370 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1371 struct svc_fh *current_fh = &cstate->current_fh;
1372 const struct nfsd4_layout_ops *ops;
1373 struct nfs4_layout_stateid *ls;
1374 __be32 nfserr;
1375 int accmode;
1376
1377 switch (lgp->lg_seg.iomode) {
1378 case IOMODE_READ:
1379 accmode = NFSD_MAY_READ;
1380 break;
1381 case IOMODE_RW:
1382 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1383 break;
1384 default:
1385 dprintk("%s: invalid iomode %d\n",
1386 __func__, lgp->lg_seg.iomode);
1387 nfserr = nfserr_badiomode;
1388 goto out;
1389 }
1390
1391 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1392 if (nfserr)
1393 goto out;
1394
1395 nfserr = nfserr_layoutunavailable;
1396 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1397 if (!ops)
1398 goto out;
1399
1400 /*
1401 * Verify minlength and range as per RFC5661:
1402 * o If loga_length is less than loga_minlength,
1403 * the metadata server MUST return NFS4ERR_INVAL.
1404 * o If the sum of loga_offset and loga_minlength exceeds
1405 * NFS4_UINT64_MAX, and loga_minlength is not
1406 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1407 * o If the sum of loga_offset and loga_length exceeds
1408 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1409 * the error NFS4ERR_INVAL MUST result.
1410 */
1411 nfserr = nfserr_inval;
1412 if (lgp->lg_seg.length < lgp->lg_minlength ||
1413 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1414 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1415 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1416 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1417 goto out;
1418 if (lgp->lg_seg.length == 0)
1419 goto out;
1420
1421 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1422 true, lgp->lg_layout_type, &ls);
31ef83dc
CH		 1423 if (nfserr) {
1424 trace_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1425 goto out;
31ef83dc 1426 }
9cf514cc 1427
c5c707f9
CH		 1428 nfserr = nfserr_recallconflict;
1429 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1430 goto out_put_stid;
1431
2b0143b5 1432 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1433 current_fh, lgp);
1434 if (nfserr)
1435 goto out_put_stid;
1436
1437 nfserr = nfsd4_insert_layout(lgp, ls);
1438
1439out_put_stid:
cc8a5532 1440 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1441 nfs4_put_stid(&ls->ls_stid);
1442out:
1443 return nfserr;
1444}
1445
34b1744c
BF		 1446static void
1447nfsd4_layoutget_release(union nfsd4_op_u *u)
1448{
1449 kfree(u->layoutget.lg_content);
1450}
1451
9cf514cc
CH		 1452static __be32
1453nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1454 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1455{
eb69853d 1456 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1457 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1458 struct svc_fh *current_fh = &cstate->current_fh;
1459 const struct nfsd4_layout_ops *ops;
1460 loff_t new_size = lcp->lc_last_wr + 1;
1461 struct inode *inode;
1462 struct nfs4_layout_stateid *ls;
1463 __be32 nfserr;
1464
1465 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1466 if (nfserr)
1467 goto out;
1468
1469 nfserr = nfserr_layoutunavailable;
1470 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1471 if (!ops)
1472 goto out;
2b0143b5 1473 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1474
1475 nfserr = nfserr_inval;
1476 if (new_size <= seg->offset) {
1477 dprintk("pnfsd: last write before layout segment\n");
1478 goto out;
1479 }
1480 if (new_size > seg->offset + seg->length) {
1481 dprintk("pnfsd: last write beyond layout segment\n");
1482 goto out;
1483 }
1484 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1485 dprintk("pnfsd: layoutcommit beyond EOF\n");
1486 goto out;
1487 }
1488
1489 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1490 false, lcp->lc_layout_type,
1491 &ls);
1492 if (nfserr) {
31ef83dc 1493 trace_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1494 /* fixup error code as per RFC5661 */
1495 if (nfserr == nfserr_bad_stateid)
1496 nfserr = nfserr_badlayout;
1497 goto out;
1498 }
1499
cc8a5532
JL		 1500 /* LAYOUTCOMMIT does not require any serialization */
1501 mutex_unlock(&ls->ls_mutex);
1502
9cf514cc
CH		 1503 if (new_size > i_size_read(inode)) {
1504 lcp->lc_size_chg = 1;
1505 lcp->lc_newsize = new_size;
1506 } else {
1507 lcp->lc_size_chg = 0;
1508 }
1509
d8398fc1 1510 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1511 nfs4_put_stid(&ls->ls_stid);
1512out:
1513 return nfserr;
1514}
1515
1516static __be32
1517nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 1518 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1519{
eb69853d 1520 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 1521 struct svc_fh *current_fh = &cstate->current_fh;
1522 __be32 nfserr;
1523
1524 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1525 if (nfserr)
1526 goto out;
1527
1528 nfserr = nfserr_layoutunavailable;
1529 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1530 goto out;
1531
1532 switch (lrp->lr_seg.iomode) {
1533 case IOMODE_READ:
1534 case IOMODE_RW:
1535 case IOMODE_ANY:
1536 break;
1537 default:
1538 dprintk("%s: invalid iomode %d\n", __func__,
1539 lrp->lr_seg.iomode);
1540 nfserr = nfserr_inval;
1541 goto out;
1542 }
1543
1544 switch (lrp->lr_return_type) {
1545 case RETURN_FILE:
1546 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1547 break;
1548 case RETURN_FSID:
1549 case RETURN_ALL:
1550 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1551 break;
1552 default:
1553 dprintk("%s: invalid return_type %d\n", __func__,
1554 lrp->lr_return_type);
1555 nfserr = nfserr_inval;
1556 break;
1557 }
1558out:
1559 return nfserr;
1560}
1561#endif /* CONFIG_NFSD_PNFS */
1562
1da177e4
LT		 1563/*
1564 * NULL call.
1565 */
7111c66e 1566static __be32
a6beb732 1567nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 1568{
1569 return nfs_ok;
1570}
1571
e2b20950
SA		 1572static inline void nfsd4_increment_op_stats(u32 opnum)
1573{
1574 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1575 nfsdstats.nfs4_opcount[opnum]++;
1576}
1577
bb2a8b0c 1578static const struct nfsd4_operation nfsd4_ops[];
b591480b 1579
f1c7f79b 1580static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1581
f9bb94c4 1582/*
57716355 1583 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1584 *
57716355
BF		 1585 * Also note, enforced elsewhere:
1586 * - SEQUENCE other than as first op results in
1587 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1588 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1589 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1590 * - DESTROY_SESSION must be the final operation in a compound, if
1591 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1592 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1593 */
57716355 1594static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1595{
57716355
BF		 1596 struct nfsd4_op *op = &args->ops[0];
1597
1598 /* These ordering requirements don't apply to NFSv4.0: */
1599 if (args->minorversion == 0)
1600 return nfs_ok;
1601 /* This is weird, but OK, not our problem: */
1602 if (args->opcnt == 0)
1603 return nfs_ok;
1604 if (op->status == nfserr_op_illegal)
1605 return nfs_ok;
1606 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1607 return nfserr_op_not_in_session;
1608 if (op->opnum == OP_SEQUENCE)
1609 return nfs_ok;
1610 if (args->opcnt != 1)
1611 return nfserr_not_only_op;
1612 return nfs_ok;
f9bb94c4
AA		 1613}
1614
f4f9ef4a 1615const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 1616{
1617 return &nfsd4_ops[op->opnum];
1618}
1619
1091006c
BF		 1620bool nfsd4_cache_this_op(struct nfsd4_op *op)
1621{
e372ba60
BF		 1622 if (op->opnum == OP_ILLEGAL)
1623 return false;
c856694e 1624 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1625}
1626
68d93184
BF		 1627static bool need_wrongsec_check(struct svc_rqst *rqstp)
1628{
1629 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1630 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1631 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1632 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 1633 const struct nfsd4_operation *thisd = OPDESC(this);
1634 const struct nfsd4_operation *nextd;
68d93184 1635
68d93184
BF		 1636 /*
1637 * Most ops check wronsec on our own; only the putfh-like ops
1638 * have special rules.
1639 */
1640 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1641 return false;
1642 /*
1643 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1644 * put-filehandle operation if we're not going to use the
1645 * result:
1646 */
1647 if (argp->opcnt == resp->opcnt)
1648 return false;
51904b08
BF		 1649 if (next->opnum == OP_ILLEGAL)
1650 return false;
68d93184
BF		 1651 nextd = OPDESC(next);
1652 /*
1653 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1654 * errors themselves as necessary; others should check for them
1655 * now:
1656 */
1657 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1658}
1659
2d124dfa
BF		 1660static void svcxdr_init_encode(struct svc_rqst *rqstp,
1661 struct nfsd4_compoundres *resp)
1662{
1663 struct xdr_stream *xdr = &resp->xdr;
1664 struct xdr_buf *buf = &rqstp->rq_res;
1665 struct kvec *head = buf->head;
1666
1667 xdr->buf = buf;
ddd1ea56 1668 xdr->iov = head;
2d124dfa 1669 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1670 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1671 /* Tail and page_len should be zero at this point: */
1672 buf->len = buf->head[0].iov_len;
2825a7f9 1673 xdr->scratch.iov_len = 0;
05638dc7 1674 xdr->page_ptr = buf->pages - 1;
2825a7f9 1675 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1676 - rqstp->rq_auth_slack;
2d124dfa
BF		 1677}
1678
1da177e4
LT		 1679/*
1680 * COMPOUND call.
1681 */
7111c66e 1682static __be32
a6beb732 1683nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 1684{
a6beb732
CH		 1685 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1686 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 1687 struct nfsd4_op *op;
e354d571 1688 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1689 struct svc_fh *current_fh = &cstate->current_fh;
1690 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1691 __be32 status;
1da177e4 1692
2d124dfa 1693 svcxdr_init_encode(rqstp, resp);
4aea24b2 1694 resp->tagp = resp->xdr.p;
1da177e4 1695 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1696 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1697 resp->taglen = args->taglen;
1698 resp->tag = args->tag;
1da177e4 1699 resp->rqstp = rqstp;
4daeed25 1700 cstate->minorversion = args->minorversion;
4daeed25
KM		 1701 fh_init(current_fh, NFS4_FHSIZE);
1702 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1703 /*
1704 * Don't use the deferral mechanism for NFSv4; compounds make it
1705 * too hard to avoid non-idempotency problems.
1706 */
30660e04 1707 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1708
1709 /*
1710 * According to RFC3010, this takes precedence over all other errors.
1711 */
1712 status = nfserr_minor_vers_mismatch;
35f7a14f 1713 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4
LT		 1714 goto out;
1715
57716355
BF		 1716 status = nfs41_check_op_ordering(args);
1717 if (status) {
f9bb94c4 1718 op = &args->ops[0];
57716355 1719 op->status = status;
f9bb94c4
AA		 1720 goto encode_op;
1721 }
1722
1da177e4
LT		 1723 while (!status && resp->opcnt < args->opcnt) {
1724 op = &args->ops[resp->opcnt++];
1725
b001a1b6
BH		 1726 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1727 resp->opcnt, args->opcnt, op->opnum,
1728 nfsd4_op_name(op->opnum));
1da177e4
LT		 1729 /*
1730 * The XDR decode routines may have pre-set op->status;
1731 * for example, if there is a miscellaneous XDR error
1732 * it will be set to nfserr_bad_xdr.
1733 */
9d313b17
BF		 1734 if (op->status) {
1735 if (op->opnum == OP_OPEN)
1736 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1737 goto encode_op;
9d313b17 1738 }
1da177e4 1739
4daeed25 1740 if (!current_fh->fh_dentry) {
f4f9ef4a 1741 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1742 op->status = nfserr_nofilehandle;
1743 goto encode_op;
1744 }
4daeed25 1745 } else if (current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 1746 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1747 op->status = nfserr_moved;
1da177e4
LT		 1748 goto encode_op;
1749 }
b591480b 1750
2336745e
KM		 1751 fh_clear_wcc(current_fh);
1752
58e7b33a 1753 /* If op is non-idempotent */
f4f9ef4a 1754 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1755 /*
a8095f7e
BF		 1756 * Don't execute this op if we couldn't encode a
1757 * succesful reply:
1758 */
f4f9ef4a 1759 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 1760 /*
1761 * Plus if there's another operation, make sure
4c69d585
BF		 1762 * we'll have space to at least encode an error:
1763 */
1764 if (resp->opcnt < args->opcnt)
1765 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1766 op->status = nfsd4_check_resp_size(resp, plen);
1767 }
1768
1769 if (op->status)
1770 goto encode_op;
1771
f4f9ef4a
BF		 1772 if (op->opdesc->op_get_currentstateid)
1773 op->opdesc->op_get_currentstateid(cstate, &op->u);
1774 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1775
9a307403
BF		 1776 /* Only from SEQUENCE */
1777 if (cstate->status == nfserr_replay_cache) {
1778 dprintk("%s NFS4.1 replay from cache\n", __func__);
1779 status = op->status;
1780 goto out;
1781 }
8b70484c 1782 if (!op->status) {
f4f9ef4a
BF		 1783 if (op->opdesc->op_set_currentstateid)
1784 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 1785
f4f9ef4a 1786 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1787 clear_current_stateid(cstate);
8b70484c
TM		 1788
1789 if (need_wrongsec_check(rqstp))
4daeed25 1790 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1791 }
1da177e4 1792encode_op:
a90b061c 1793 if (op->status == nfserr_replay_me) {
a4f1706a 1794 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1795 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1796 status = op->status = op->replay->rp_status;
1797 } else {
1798 nfsd4_encode_operation(resp, op);
1799 status = op->status;
1800 }
0407717d
BH		 1801
1802 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1803 args->ops, args->opcnt, resp->opcnt, op->opnum,
1804 be32_to_cpu(status));
1805
58fb12e6 1806 nfsd4_cstate_clear_replay(cstate);
e2b20950 1807 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1808 }
1809
4daeed25
KM		 1810 cstate->status = status;
1811 fh_put(current_fh);
1812 fh_put(save_fh);
1813 BUG_ON(cstate->replay_owner);
1da177e4 1814out:
2f425878 1815 /* Reset deferral mechanism for RPC deferrals */
30660e04 1816 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1817 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1818 return status;
1819}
1820
58e7b33a
MJ		 1821#define op_encode_hdr_size (2)
1822#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1823#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1824#define op_encode_change_info_maxsz (5)
1825#define nfs4_fattr_bitmap_maxsz (4)
1826
8c7424cf
BF		 1827/* We'll fall back on returning no lockowner if run out of space: */
1828#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1829#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1830
1831#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1832
1833#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1834#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1835 op_encode_ace_maxsz)
1836
1837#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1838
1839static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1840{
1841 return (op_encode_hdr_size) * sizeof(__be32);
1842}
1843
1844static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1845{
1846 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1847}
1848
2282cd2c
KM		 1849static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1850{
1851 /* ac_supported, ac_resp_access */
1852 return (op_encode_hdr_size + 2)* sizeof(__be32);
1853}
1854
58e7b33a
MJ		 1855static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1856{
1857 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1858}
1859
1860static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1861{
1862 return (op_encode_hdr_size + op_encode_change_info_maxsz
1863 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1864}
1865
b86cef60
BF		 1866/*
1867 * Note since this is an idempotent operation we won't insist on failing
1868 * the op prematurely if the estimate is too large. We may turn off splice
1869 * reads unnecessarily.
1870 */
1871static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1872 struct nfsd4_op *op)
1873{
1874 u32 *bmap = op->u.getattr.ga_bmval;
1875 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1876 u32 ret = 0;
1877
1878 if (bmap0 & FATTR4_WORD0_ACL)
1879 return svc_max_payload(rqstp);
1880 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1881 return svc_max_payload(rqstp);
1882
1883 if (bmap1 & FATTR4_WORD1_OWNER) {
1884 ret += IDMAP_NAMESZ + 4;
1885 bmap1 &= ~FATTR4_WORD1_OWNER;
1886 }
1887 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1888 ret += IDMAP_NAMESZ + 4;
1889 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1890 }
1891 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1892 ret += NFS4_FHSIZE + 4;
1893 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1894 }
1895 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 1896 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 1897 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1898 }
1899 /*
1900 * Largest of remaining attributes are 16 bytes (e.g.,
1901 * supported_attributes)
1902 */
1903 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1904 /* bitmask, length */
1905 ret += 20;
1906 return ret;
1907}
1908
2282cd2c
KM		 1909static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1910{
1911 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1912}
1913
58e7b33a
MJ		 1914static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1915{
1916 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1917 * sizeof(__be32);
1918}
1919
1920static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1921{
1922 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1923 * sizeof(__be32);
1924}
1925
1926static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1927{
1928 return (op_encode_hdr_size + op_encode_stateid_maxsz
1929 + op_encode_change_info_maxsz + 1
1930 + nfs4_fattr_bitmap_maxsz
1931 + op_encode_delegation_maxsz) * sizeof(__be32);
1932}
1933
1934static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1935{
1936 u32 maxcount = 0, rlen = 0;
1937
1938 maxcount = svc_max_payload(rqstp);
3c7aa15d 1939 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1940
622f560e 1941 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1942}
1943
1944static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1945{
3c7aa15d 1946 u32 maxcount = 0, rlen = 0;
58e7b33a 1947
3c7aa15d
KM		 1948 maxcount = svc_max_payload(rqstp);
1949 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1950
561f0ed4
BF		 1951 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1952 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1953}
1954
2282cd2c
KM		 1955static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1956{
1957 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1958}
1959
58e7b33a
MJ		 1960static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1961{
1962 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1963 * sizeof(__be32);
1964}
1965
1966static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1967{
1968 return (op_encode_hdr_size + op_encode_change_info_maxsz
1969 + op_encode_change_info_maxsz) * sizeof(__be32);
1970}
1971
ccae70a9
BF		 1972static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1973 struct nfsd4_op *op)
1974{
d1d84c96
BF		 1975 return (op_encode_hdr_size
1976 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1977}
1978
2282cd2c
KM		 1979static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1980{
1981 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1982 * sizeof(__be32);
1983}
1984
58e7b33a
MJ		 1985static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1986{
1987 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1988}
1989
2282cd2c
KM		 1990static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1991{
1992 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1993 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
1994}
1995
58e7b33a
MJ		 1996static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1997{
480efaee
BF		 1998 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1999 sizeof(__be32);
58e7b33a
MJ		 2000}
2001
2002static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2003{
f34e432b 2004 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2005}
2006
2007static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2008{
2009 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2010 1 + 1 + /* eir_flags, spr_how */\
2011 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2012 2 + /*eir_server_owner.so_minor_id */\
2013 /* eir_server_owner.so_major_id<> */\
2014 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2015 /* eir_server_scope<> */\
2016 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2017 1 + /* eir_server_impl_id array length */\
2018 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2019}
2020
2021static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2022{
2023 return (op_encode_hdr_size + \
2024 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2025 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2026}
2027
2028static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2029{
2030 return (op_encode_hdr_size + \
2031 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2032 2 + /* csr_sequence, csr_flags */\
2033 op_encode_channel_attrs_maxsz + \
2034 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2035}
2036
29ae7f9d
AS		 2037static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2038{
2039 return (op_encode_hdr_size +
2040 1 /* wr_callback */ +
2041 op_encode_stateid_maxsz /* wr_callback */ +
2042 2 /* wr_count */ +
2043 1 /* wr_committed */ +
2044 op_encode_verifier_maxsz +
2045 1 /* cr_consecutive */ +
2046 1 /* cr_synchronous */) * sizeof(__be32);
2047}
2048
9cf514cc 2049#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2050static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2051{
2052 u32 maxcount = 0, rlen = 0;
2053
2054 maxcount = svc_max_payload(rqstp);
2055 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2056
2057 return (op_encode_hdr_size +
2058 1 /* gd_layout_type*/ +
2059 XDR_QUADLEN(rlen) +
2060 2 /* gd_notify_types */) * sizeof(__be32);
2061}
2062
9cf514cc
CH		 2063/*
2064 * At this stage we don't really know what layout driver will handle the request,
2065 * so we need to define an arbitrary upper bound here.
2066 */
2067#define MAX_LAYOUT_SIZE 128
2068static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2069{
2070 return (op_encode_hdr_size +
2071 1 /* logr_return_on_close */ +
2072 op_encode_stateid_maxsz +
2073 1 /* nr of layouts */ +
2074 MAX_LAYOUT_SIZE) * sizeof(__be32);
2075}
2076
2077static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2078{
2079 return (op_encode_hdr_size +
2080 1 /* locr_newsize */ +
2081 2 /* ns_size */) * sizeof(__be32);
2082}
2083
2084static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2085{
2086 return (op_encode_hdr_size +
2087 1 /* lrs_stateid */ +
2088 op_encode_stateid_maxsz) * sizeof(__be32);
2089}
2090#endif /* CONFIG_NFSD_PNFS */
2091
2282cd2c
KM		 2092
2093static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2094{
2095 return (op_encode_hdr_size + 3) * sizeof(__be32);
2096}
2097
bb2a8b0c 2098static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2099 [OP_ACCESS] = {
eb69853d 2100 .op_func = nfsd4_access,
b001a1b6 2101 .op_name = "OP_ACCESS",
1c122638 2102 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2103 },
2104 [OP_CLOSE] = {
eb69853d 2105 .op_func = nfsd4_close,
58e7b33a 2106 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2107 .op_name = "OP_CLOSE",
1c122638 2108 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2109 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2110 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2111 },
2112 [OP_COMMIT] = {
eb69853d 2113 .op_func = nfsd4_commit,
58e7b33a 2114 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2115 .op_name = "OP_COMMIT",
1c122638 2116 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2117 },
2118 [OP_CREATE] = {
eb69853d 2119 .op_func = nfsd4_create,
d1471053 2120 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2121 .op_name = "OP_CREATE",
1c122638 2122 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2123 },
2124 [OP_DELEGRETURN] = {
eb69853d 2125 .op_func = nfsd4_delegreturn,
58e7b33a 2126 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2127 .op_name = "OP_DELEGRETURN",
58e7b33a 2128 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2129 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2130 },
2131 [OP_GETATTR] = {
eb69853d 2132 .op_func = nfsd4_getattr,
eeac294e 2133 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2134 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2135 .op_name = "OP_GETATTR",
b591480b
BF		 2136 },
2137 [OP_GETFH] = {
eb69853d 2138 .op_func = nfsd4_getfh,
b001a1b6 2139 .op_name = "OP_GETFH",
1c122638 2140 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2141 },
2142 [OP_LINK] = {
eb69853d 2143 .op_func = nfsd4_link,
c856694e
BF		 2144 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2145 | OP_CACHEME,
b001a1b6 2146 .op_name = "OP_LINK",
1c122638 2147 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2148 },
2149 [OP_LOCK] = {
eb69853d 2150 .op_func = nfsd4_lock,
b7571e4c
BF		 2151 .op_flags = OP_MODIFIES_SOMETHING |
2152 OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2153 .op_name = "OP_LOCK",
1c122638 2154 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2155 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2156 },
2157 [OP_LOCKT] = {
eb69853d 2158 .op_func = nfsd4_lockt,
b7571e4c 2159 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2160 .op_name = "OP_LOCKT",
1c122638 2161 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2162 },
2163 [OP_LOCKU] = {
eb69853d 2164 .op_func = nfsd4_locku,
58e7b33a 2165 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2166 .op_name = "OP_LOCKU",
1c122638 2167 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2168 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2169 },
2170 [OP_LOOKUP] = {
eb69853d 2171 .op_func = nfsd4_lookup,
d1471053 2172 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2173 .op_name = "OP_LOOKUP",
1c122638 2174 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2175 },
2176 [OP_LOOKUPP] = {
eb69853d 2177 .op_func = nfsd4_lookupp,
d1471053 2178 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2179 .op_name = "OP_LOOKUPP",
1c122638 2180 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2181 },
2182 [OP_NVERIFY] = {
eb69853d 2183 .op_func = nfsd4_nverify,
b001a1b6 2184 .op_name = "OP_NVERIFY",
1c122638 2185 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2186 },
2187 [OP_OPEN] = {
eb69853d 2188 .op_func = nfsd4_open,
58e7b33a 2189 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2190 .op_name = "OP_OPEN",
1c122638 2191 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2192 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2193 },
2194 [OP_OPEN_CONFIRM] = {
eb69853d 2195 .op_func = nfsd4_open_confirm,
58e7b33a 2196 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2197 .op_name = "OP_OPEN_CONFIRM",
1c122638 2198 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2199 },
2200 [OP_OPEN_DOWNGRADE] = {
eb69853d 2201 .op_func = nfsd4_open_downgrade,
58e7b33a 2202 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2203 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2204 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2205 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2206 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2207 },
2208 [OP_PUTFH] = {
eb69853d 2209 .op_func = nfsd4_putfh,
68d93184 2210 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2211 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2212 .op_name = "OP_PUTFH",
1c122638 2213 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2214 },
eeac294e 2215 [OP_PUTPUBFH] = {
eb69853d 2216 .op_func = nfsd4_putrootfh,
68d93184 2217 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2218 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2219 .op_name = "OP_PUTPUBFH",
1c122638 2220 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2221 },
b591480b 2222 [OP_PUTROOTFH] = {
eb69853d 2223 .op_func = nfsd4_putrootfh,
68d93184 2224 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2225 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2226 .op_name = "OP_PUTROOTFH",
1c122638 2227 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2228 },
2229 [OP_READ] = {
eb69853d 2230 .op_func = nfsd4_read,
34b1744c 2231 .op_release = nfsd4_read_release,
b001a1b6 2232 .op_name = "OP_READ",
1c122638 2233 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2234 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2235 },
2236 [OP_READDIR] = {
eb69853d 2237 .op_func = nfsd4_readdir,
b001a1b6 2238 .op_name = "OP_READDIR",
1c122638 2239 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2240 },
2241 [OP_READLINK] = {
eb69853d 2242 .op_func = nfsd4_readlink,
b001a1b6 2243 .op_name = "OP_READLINK",
1c122638 2244 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2245 },
2246 [OP_REMOVE] = {
eb69853d 2247 .op_func = nfsd4_remove,
c856694e 2248 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2249 .op_name = "OP_REMOVE",
1c122638 2250 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2251 },
2252 [OP_RENAME] = {
eb69853d 2253 .op_func = nfsd4_rename,
c856694e 2254 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2255 .op_name = "OP_RENAME",
1c122638 2256 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2257 },
2258 [OP_RENEW] = {
eb69853d 2259 .op_func = nfsd4_renew,
58e7b33a
MJ		 2260 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2261 | OP_MODIFIES_SOMETHING,
b001a1b6 2262 .op_name = "OP_RENEW",
1c122638 2263 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2264
b591480b
BF		 2265 },
2266 [OP_RESTOREFH] = {
eb69853d 2267 .op_func = nfsd4_restorefh,
68d93184 2268 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2269 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2270 .op_name = "OP_RESTOREFH",
1c122638 2271 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2272 },
2273 [OP_SAVEFH] = {
eb69853d 2274 .op_func = nfsd4_savefh,
58e7b33a 2275 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2276 .op_name = "OP_SAVEFH",
1c122638 2277 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2278 },
dcb488a3 2279 [OP_SECINFO] = {
eb69853d 2280 .op_func = nfsd4_secinfo,
34b1744c 2281 .op_release = nfsd4_secinfo_release,
68d93184 2282 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2283 .op_name = "OP_SECINFO",
1c122638 2284 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2285 },
b591480b 2286 [OP_SETATTR] = {
eb69853d 2287 .op_func = nfsd4_setattr,
b001a1b6 2288 .op_name = "OP_SETATTR",
b7571e4c
BF		 2289 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2290 | OP_NONTRIVIAL_ERROR_ENCODE,
1c122638 2291 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 2292 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 2293 },
2294 [OP_SETCLIENTID] = {
eb69853d 2295 .op_func = nfsd4_setclientid,
58e7b33a 2296 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
b7571e4c
BF		 2297 | OP_MODIFIES_SOMETHING | OP_CACHEME
2298 | OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2299 .op_name = "OP_SETCLIENTID",
1c122638 2300 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 2301 },
2302 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 2303 .op_func = nfsd4_setclientid_confirm,
58e7b33a 2304 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2305 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2306 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 2307 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2308 },
2309 [OP_VERIFY] = {
eb69853d 2310 .op_func = nfsd4_verify,
b001a1b6 2311 .op_name = "OP_VERIFY",
1c122638 2312 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2313 },
2314 [OP_WRITE] = {
eb69853d 2315 .op_func = nfsd4_write,
c856694e 2316 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2317 .op_name = "OP_WRITE",
1c122638 2318 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 2319 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 2320 },
2321 [OP_RELEASE_LOCKOWNER] = {
eb69853d 2322 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 2323 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2324 | OP_MODIFIES_SOMETHING,
b001a1b6 2325 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 2326 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2327 },
069b6ad4
AA		 2328
2329 /* NFSv4.1 operations */
2330 [OP_EXCHANGE_ID] = {
eb69853d 2331 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 2332 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2333 | OP_MODIFIES_SOMETHING,
069b6ad4 2334 .op_name = "OP_EXCHANGE_ID",
1c122638 2335 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 2336 },
cb73a9f4 2337 [OP_BACKCHANNEL_CTL] = {
eb69853d 2338 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 2339 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2340 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 2341 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 2342 },
1d1bc8f2 2343 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 2344 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2345 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2346 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2347 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 2348 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2349 },
069b6ad4 2350 [OP_CREATE_SESSION] = {
eb69853d 2351 .op_func = nfsd4_create_session,
58e7b33a
MJ		 2352 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2353 | OP_MODIFIES_SOMETHING,
069b6ad4 2354 .op_name = "OP_CREATE_SESSION",
1c122638 2355 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 2356 },
2357 [OP_DESTROY_SESSION] = {
eb69853d 2358 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 2359 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2360 | OP_MODIFIES_SOMETHING,
069b6ad4 2361 .op_name = "OP_DESTROY_SESSION",
1c122638 2362 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 2363 },
2364 [OP_SEQUENCE] = {
eb69853d 2365 .op_func = nfsd4_sequence,
f9bb94c4 2366 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2367 .op_name = "OP_SEQUENCE",
1c122638 2368 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 2369 },
094b5d74 2370 [OP_DESTROY_CLIENTID] = {
eb69853d 2371 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 2372 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2373 | OP_MODIFIES_SOMETHING,
094b5d74 2374 .op_name = "OP_DESTROY_CLIENTID",
1c122638 2375 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 2376 },
4dc6ec00 2377 [OP_RECLAIM_COMPLETE] = {
eb69853d 2378 .op_func = nfsd4_reclaim_complete,
58e7b33a 2379 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2380 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 2381 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 2382 },
04f4ad16 2383 [OP_SECINFO_NO_NAME] = {
eb69853d 2384 .op_func = nfsd4_secinfo_no_name,
ec572b9e 2385 .op_release = nfsd4_secinfo_no_name_release,
68d93184 2386 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2387 .op_name = "OP_SECINFO_NO_NAME",
1c122638 2388 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 2389 },
17456804 2390 [OP_TEST_STATEID] = {
eb69853d 2391 .op_func = nfsd4_test_stateid,
17456804
BS		 2392 .op_flags = ALLOWED_WITHOUT_FH,
2393 .op_name = "OP_TEST_STATEID",
1c122638 2394 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 2395 },
e1ca12df 2396 [OP_FREE_STATEID] = {
eb69853d 2397 .op_func = nfsd4_free_stateid,
58e7b33a 2398 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2399 .op_name = "OP_FREE_STATEID",
57832e7b 2400 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 2401 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 2402 },
9cf514cc
CH		 2403#ifdef CONFIG_NFSD_PNFS
2404 [OP_GETDEVICEINFO] = {
eb69853d 2405 .op_func = nfsd4_getdeviceinfo,
34b1744c 2406 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 2407 .op_flags = ALLOWED_WITHOUT_FH,
2408 .op_name = "OP_GETDEVICEINFO",
1c122638 2409 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 2410 },
2411 [OP_LAYOUTGET] = {
eb69853d 2412 .op_func = nfsd4_layoutget,
34b1744c 2413 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 2414 .op_flags = OP_MODIFIES_SOMETHING,
2415 .op_name = "OP_LAYOUTGET",
1c122638 2416 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 2417 },
2418 [OP_LAYOUTCOMMIT] = {
eb69853d 2419 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 2420 .op_flags = OP_MODIFIES_SOMETHING,
2421 .op_name = "OP_LAYOUTCOMMIT",
1c122638 2422 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 2423 },
2424 [OP_LAYOUTRETURN] = {
eb69853d 2425 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 2426 .op_flags = OP_MODIFIES_SOMETHING,
2427 .op_name = "OP_LAYOUTRETURN",
1c122638 2428 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 2429 },
2430#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2431
2432 /* NFSv4.2 operations */
95d871f0 2433 [OP_ALLOCATE] = {
eb69853d 2434 .op_func = nfsd4_allocate,
95d871f0
AS		 2435 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2436 .op_name = "OP_ALLOCATE",
1c122638 2437 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 2438 },
b0cb9085 2439 [OP_DEALLOCATE] = {
eb69853d 2440 .op_func = nfsd4_deallocate,
b0cb9085
AS		 2441 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2442 .op_name = "OP_DEALLOCATE",
1c122638 2443 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 2444 },
ffa0160a 2445 [OP_CLONE] = {
eb69853d 2446 .op_func = nfsd4_clone,
ffa0160a
CH		 2447 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2448 .op_name = "OP_CLONE",
1c122638 2449 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 2450 },
29ae7f9d 2451 [OP_COPY] = {
eb69853d 2452 .op_func = nfsd4_copy,
29ae7f9d
AS		 2453 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2454 .op_name = "OP_COPY",
1c122638 2455 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 2456 },
24bab491 2457 [OP_SEEK] = {
eb69853d 2458 .op_func = nfsd4_seek,
24bab491 2459 .op_name = "OP_SEEK",
1c122638 2460 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 2461 },
b591480b
BF		 2462};
2463
ed941643
AE		 2464/**
2465 * nfsd4_spo_must_allow - Determine if the compound op contains an
2466 * operation that is allowed to be sent with machine credentials
2467 *
2468 * @rqstp: a pointer to the struct svc_rqst
2469 *
2470 * Checks to see if the compound contains a spo_must_allow op
2471 * and confirms that it was sent with the proper machine creds.
2472 */
2473
2474bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2475{
2476 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2477 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2478 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2479 struct nfsd4_compound_state *cstate = &resp->cstate;
2480 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2481 u32 opiter;
2482
2483 if (!cstate->minorversion)
2484 return false;
2485
2486 if (cstate->spo_must_allowed == true)
2487 return true;
2488
2489 opiter = resp->opcnt;
2490 while (opiter < argp->opcnt) {
2491 this = &argp->ops[opiter++];
2492 if (test_bit(this->opnum, allow->u.longs) &&
2493 cstate->clp->cl_mach_cred &&
2494 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2495 cstate->spo_must_allowed = true;
2496 return true;
2497 }
2498 }
2499 cstate->spo_must_allowed = false;
2500 return false;
2501}
2502
4f0cefbf
BF		 2503int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2504{
05b7278d 2505 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 2506 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 2507
2508 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2509 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 2510}
2511
07d1f802
BF		 2512void warn_on_nonidempotent_op(struct nfsd4_op *op)
2513{
2514 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2515 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2516 op->opnum, nfsd4_op_name(op->opnum));
2517 WARN_ON_ONCE(1);
2518 }
2519}
2520
f1c7f79b 2521static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2522{
2523 if (opnum < ARRAY_SIZE(nfsd4_ops))
2524 return nfsd4_ops[opnum].op_name;
2525 return "unknown_operation";
2526}
2527
1da177e4 2528#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2529struct nfsd4_voidargs { int dummy; };
2530
860bda29 2531static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 2532 [NFSPROC4_NULL] = {
f7235b6b 2533 .pc_func = nfsd4_proc_null,
63f8de37 2534 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 2535 .pc_argsize = sizeof(struct nfsd4_voidargs),
2536 .pc_ressize = sizeof(struct nfsd4_voidres),
2537 .pc_cachetype = RC_NOCACHE,
2538 .pc_xdrressize = 1,
2539 },
2540 [NFSPROC4_COMPOUND] = {
f7235b6b 2541 .pc_func = nfsd4_proc_compound,
026fec7e 2542 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 2543 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 2544 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2545 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2546 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2547 .pc_cachetype = RC_NOCACHE,
2548 .pc_xdrressize = NFSD_BUFSIZE/4,
2549 },
1da177e4
LT		 2550};
2551
7fd38af9 2552static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 2553const struct svc_version nfsd_version4 = {
5283b03e
JL		 2554 .vs_vers = 4,
2555 .vs_nproc = 2,
2556 .vs_proc = nfsd_procedures4,
7fd38af9 2557 .vs_count = nfsd_count3,
5283b03e
JL		 2558 .vs_dispatch = nfsd_dispatch,
2559 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2560 .vs_rpcb_optnl = true,
2561 .vs_need_cong_ctrl = true,
1da177e4
LT		 2562};
2563
2564/*
2565 * Local variables:
2566 * c-basic-offset: 8
2567 * End:
2568 */
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