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nfsd4: define ->op_release for compound ops
[people/ms/linux.git] / fs / nfsd / nfs4proc.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4 34 */
7e06b7f9 35#include <linux/file.h>
b0cb9085 36#include <linux/falloc.h>
5a0e3ad6 37#include <linux/slab.h>
1da177e4 38
58e7b33a 39#include "idmap.h"
9a74af21
BH		 40#include "cache.h"
41#include "xdr4.h"
0a3adade 42#include "vfs.h"
8b70484c 43#include "current_stateid.h"
3320fef1 44#include "netns.h"
4ac7249e 45#include "acl.h"
9cf514cc 46#include "pnfs.h"
31ef83dc 47#include "trace.h"
1da177e4 48
18032ca0
DQ		 49#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
50#include <linux/security.h>
51
52static inline void
53nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
54{
2b0143b5 55 struct inode *inode = d_inode(resfh->fh_dentry);
18032ca0
DQ		 56 int status;
57
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
7191155b 930static __be32
ca364317 931nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 932 union nfsd4_op_u *u)
1da177e4 933{
eb69853d 934 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 935 __be32 status = nfs_ok;
96f6f985 936 int err;
1da177e4 937
1da177e4 938 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 939 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed
AS		 940 &cstate->current_fh, &setattr->sa_stateid,
941 WR_STATE, NULL, NULL);
375c5547 942 if (status) {
3e3b4800 943 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 944 return status;
945 }
1da177e4 946 }
96f6f985
AV		 947 err = fh_want_write(&cstate->current_fh);
948 if (err)
949 return nfserrno(err);
1da177e4 950 status = nfs_ok;
3c8e0316
YZ		 951
952 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
953 nfsd_attrmask);
954 if (status)
955 goto out;
956
1da177e4 957 if (setattr->sa_acl != NULL)
ca364317
BF		 958 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
959 setattr->sa_acl);
1da177e4 960 if (status)
18f335af 961 goto out;
18032ca0
DQ		 962 if (setattr->sa_label.len)
963 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
964 &setattr->sa_label);
965 if (status)
966 goto out;
ca364317 967 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 968 0, (time_t)0);
18f335af 969out:
bad0dcff 970 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 971 return status;
972}
973
ffe1137b
BF		 974static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
975{
976 int i = 1;
977 int buflen = write->wr_buflen;
978
979 vec[0].iov_base = write->wr_head.iov_base;
980 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
981 buflen -= vec[0].iov_len;
982
983 while (buflen) {
984 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
985 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
986 buflen -= vec[i].iov_len;
987 i++;
988 }
989 return i;
990}
991
7191155b 992static __be32
ca364317 993nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 994 union nfsd4_op_u *u)
1da177e4 995{
eb69853d 996 struct nfsd4_write *write = &u->write;
1da177e4
LT		 997 stateid_t *stateid = &write->wr_stateid;
998 struct file *filp = NULL;
b37ad28b 999 __be32 status = nfs_ok;
31dec253 1000 unsigned long cnt;
ffe1137b 1001 int nvecs;
1da177e4 1002
1da177e4
LT		 1003 if (write->wr_offset >= OFFSET_MAX)
1004 return nfserr_inval;
1005
aa0d6aed
AS		 1006 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1007 stateid, WR_STATE, &filp, NULL);
375c5547
BF		 1008 if (status) {
1009 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1010 return status;
1011 }
1012
31dec253 1013 cnt = write->wr_buflen;
1da177e4 1014 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1015 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1016
ffe1137b
BF		 1017 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1018 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1019
af90f707
CH		 1020 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1021 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 1022 write->wr_how_written);
af90f707 1023 fput(filp);
1da177e4 1024
31dec253
DS		 1025 write->wr_bytes_written = cnt;
1026
1da177e4 1027 return status;
1da177e4
LT		 1028}
1029
ffa0160a 1030static __be32
29ae7f9d
AS		 1031nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1032 stateid_t *src_stateid, struct file **src,
1033 stateid_t *dst_stateid, struct file **dst)
ffa0160a 1034{
ffa0160a
CH		 1035 __be32 status;
1036
1037 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
29ae7f9d 1038 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1039 if (status) {
1040 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1041 goto out;
1042 }
1043
1044 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
29ae7f9d 1045 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1046 if (status) {
1047 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1048 goto out_put_src;
1049 }
1050
1051 /* fix up for NFS-specific error code */
29ae7f9d
AS		 1052 if (!S_ISREG(file_inode(*src)->i_mode) ||
1053 !S_ISREG(file_inode(*dst)->i_mode)) {
ffa0160a
CH		 1054 status = nfserr_wrong_type;
1055 goto out_put_dst;
1056 }
1057
29ae7f9d
AS		 1058out:
1059 return status;
1060out_put_dst:
1061 fput(*dst);
1062out_put_src:
1063 fput(*src);
1064 goto out;
1065}
1066
1067static __be32
1068nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1069 union nfsd4_op_u *u)
29ae7f9d 1070{
eb69853d 1071 struct nfsd4_clone *clone = &u->clone;
29ae7f9d
AS		 1072 struct file *src, *dst;
1073 __be32 status;
1074
1075 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1076 &clone->cl_dst_stateid, &dst);
1077 if (status)
1078 goto out;
1079
ffa0160a
CH		 1080 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1081 dst, clone->cl_dst_pos, clone->cl_count);
1082
ffa0160a 1083 fput(dst);
ffa0160a
CH		 1084 fput(src);
1085out:
1086 return status;
1087}
1088
29ae7f9d
AS		 1089static __be32
1090nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1091 union nfsd4_op_u *u)
29ae7f9d 1092{
eb69853d 1093 struct nfsd4_copy *copy = &u->copy;
29ae7f9d
AS		 1094 struct file *src, *dst;
1095 __be32 status;
1096 ssize_t bytes;
1097
1098 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1099 &copy->cp_dst_stateid, &dst);
1100 if (status)
1101 goto out;
1102
1103 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1104 dst, copy->cp_dst_pos, copy->cp_count);
1105
1106 if (bytes < 0)
1107 status = nfserrno(bytes);
1108 else {
1109 copy->cp_res.wr_bytes_written = bytes;
1110 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1111 copy->cp_consecutive = 1;
1112 copy->cp_synchronous = 1;
1113 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1114 status = nfs_ok;
1115 }
1116
1117 fput(src);
1118 fput(dst);
1119out:
1120 return status;
1121}
1122
95d871f0
AS		 1123static __be32
1124nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1125 struct nfsd4_fallocate *fallocate, int flags)
1126{
1127 __be32 status = nfserr_notsupp;
1128 struct file *file;
1129
aa0d6aed 1130 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1131 &fallocate->falloc_stateid,
af90f707 1132 WR_STATE, &file, NULL);
95d871f0
AS		 1133 if (status != nfs_ok) {
1134 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1135 return status;
1136 }
1137
1138 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1139 fallocate->falloc_offset,
1140 fallocate->falloc_length,
1141 flags);
1142 fput(file);
1143 return status;
1144}
1145
1146static __be32
1147nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1148 union nfsd4_op_u *u)
95d871f0 1149{
eb69853d 1150 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1151}
1152
b0cb9085
AS		 1153static __be32
1154nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1155 union nfsd4_op_u *u)
b0cb9085 1156{
eb69853d 1157 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1158 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1159}
1160
24bab491
AS		 1161static __be32
1162nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1163 union nfsd4_op_u *u)
24bab491 1164{
eb69853d 1165 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1166 int whence;
1167 __be32 status;
1168 struct file *file;
1169
aa0d6aed 1170 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1171 &seek->seek_stateid,
af90f707 1172 RD_STATE, &file, NULL);
24bab491
AS		 1173 if (status) {
1174 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1175 return status;
1176 }
1177
1178 switch (seek->seek_whence) {
1179 case NFS4_CONTENT_DATA:
1180 whence = SEEK_DATA;
1181 break;
1182 case NFS4_CONTENT_HOLE:
1183 whence = SEEK_HOLE;
1184 break;
1185 default:
1186 status = nfserr_union_notsupp;
1187 goto out;
1188 }
1189
1190 /*
1191 * Note: This call does change file->f_pos, but nothing in NFSD
1192 * should ever file->f_pos.
1193 */
1194 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1195 if (seek->seek_pos < 0)
1196 status = nfserrno(seek->seek_pos);
1197 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1198 seek->seek_eof = true;
1199
1200out:
1201 fput(file);
1202 return status;
1203}
1204
1da177e4
LT		 1205/* This routine never returns NFS_OK! If there are no other errors, it
1206 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1207 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1208 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1209 */
b37ad28b 1210static __be32
c954e2a5 1211_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1212 struct nfsd4_verify *verify)
1da177e4 1213{
2ebbc012 1214 __be32 *buf, *p;
1da177e4 1215 int count;
b37ad28b 1216 __be32 status;
1da177e4 1217
8837abca 1218 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1219 if (status)
1220 return status;
1221
3c8e0316
YZ		 1222 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1223 if (status)
1224 return status;
1225
1da177e4
LT		 1226 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1227 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1228 return nfserr_inval;
1229 if (verify->ve_attrlen & 3)
1230 return nfserr_inval;
1231
1232 /* count in words:
1233 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1234 */
1235 count = 4 + (verify->ve_attrlen >> 2);
1236 buf = kmalloc(count << 2, GFP_KERNEL);
1237 if (!buf)
3e772463 1238 return nfserr_jukebox;
1da177e4 1239
84822d0b 1240 p = buf;
d5184658 1241 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1242 cstate->current_fh.fh_export,
d5184658
BF		 1243 cstate->current_fh.fh_dentry,
1244 verify->ve_bmval,
406a7ea9 1245 rqstp, 0);
41ae6e71
BF		 1246 /*
1247 * If nfsd4_encode_fattr() ran out of space, assume that's because
1248 * the attributes are longer (hence different) than those given:
1249 */
84822d0b 1250 if (status == nfserr_resource)
1da177e4
LT		 1251 status = nfserr_not_same;
1252 if (status)
1253 goto out_kfree;
1254
95ec28cd
BH		 1255 /* skip bitmap */
1256 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1257 status = nfserr_not_same;
1258 if (ntohl(*p++) != verify->ve_attrlen)
1259 goto out_kfree;
1260 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1261 status = nfserr_same;
1262
1263out_kfree:
1264 kfree(buf);
1265 return status;
1266}
1267
c954e2a5
BF		 1268static __be32
1269nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1270 union nfsd4_op_u *u)
c954e2a5
BF		 1271{
1272 __be32 status;
1273
eb69853d 1274 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1275 return status == nfserr_not_same ? nfs_ok : status;
1276}
1277
1278static __be32
1279nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1280 union nfsd4_op_u *u)
c954e2a5
BF		 1281{
1282 __be32 status;
1283
eb69853d 1284 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1285 return status == nfserr_same ? nfs_ok : status;
1286}
1287
9cf514cc
CH		 1288#ifdef CONFIG_NFSD_PNFS
1289static const struct nfsd4_layout_ops *
1290nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1291{
8a4c3926 1292 if (!exp->ex_layout_types) {
9cf514cc
CH		 1293 dprintk("%s: export does not support pNFS\n", __func__);
1294 return NULL;
1295 }
1296
b550a32e
AK		 1297 if (layout_type >= LAYOUT_TYPE_MAX ||
1298 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1299 dprintk("%s: layout type %d not supported\n",
1300 __func__, layout_type);
1301 return NULL;
1302 }
1303
1304 return nfsd4_layout_ops[layout_type];
1305}
1306
1307static __be32
1308nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1309 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1310{
eb69853d 1311 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1312 const struct nfsd4_layout_ops *ops;
1313 struct nfsd4_deviceid_map *map;
1314 struct svc_export *exp;
1315 __be32 nfserr;
1316
1317 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1318 __func__,
1319 gdp->gd_layout_type,
1320 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1321 gdp->gd_maxcount);
1322
1323 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1324 if (!map) {
1325 dprintk("%s: couldn't find device ID to export mapping!\n",
1326 __func__);
1327 return nfserr_noent;
1328 }
1329
1330 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1331 if (IS_ERR(exp)) {
1332 dprintk("%s: could not find device id\n", __func__);
1333 return nfserr_noent;
1334 }
1335
1336 nfserr = nfserr_layoutunavailable;
1337 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1338 if (!ops)
1339 goto out;
1340
1341 nfserr = nfs_ok;
f99d4fbd
CH		 1342 if (gdp->gd_maxcount != 0) {
1343 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1344 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1345 }
9cf514cc
CH		 1346
1347 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1348out:
a1420384 1349 exp_put(exp);
9cf514cc
CH		 1350 return nfserr;
1351}
1352
34b1744c
BF		 1353static void
1354nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1355{
1356 kfree(u->getdeviceinfo.gd_device);
1357}
1358
9cf514cc
CH		 1359static __be32
1360nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1361 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1362{
eb69853d 1363 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1364 struct svc_fh *current_fh = &cstate->current_fh;
1365 const struct nfsd4_layout_ops *ops;
1366 struct nfs4_layout_stateid *ls;
1367 __be32 nfserr;
1368 int accmode;
1369
1370 switch (lgp->lg_seg.iomode) {
1371 case IOMODE_READ:
1372 accmode = NFSD_MAY_READ;
1373 break;
1374 case IOMODE_RW:
1375 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1376 break;
1377 default:
1378 dprintk("%s: invalid iomode %d\n",
1379 __func__, lgp->lg_seg.iomode);
1380 nfserr = nfserr_badiomode;
1381 goto out;
1382 }
1383
1384 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1385 if (nfserr)
1386 goto out;
1387
1388 nfserr = nfserr_layoutunavailable;
1389 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1390 if (!ops)
1391 goto out;
1392
1393 /*
1394 * Verify minlength and range as per RFC5661:
1395 * o If loga_length is less than loga_minlength,
1396 * the metadata server MUST return NFS4ERR_INVAL.
1397 * o If the sum of loga_offset and loga_minlength exceeds
1398 * NFS4_UINT64_MAX, and loga_minlength is not
1399 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1400 * o If the sum of loga_offset and loga_length exceeds
1401 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1402 * the error NFS4ERR_INVAL MUST result.
1403 */
1404 nfserr = nfserr_inval;
1405 if (lgp->lg_seg.length < lgp->lg_minlength ||
1406 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1407 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1408 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1409 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1410 goto out;
1411 if (lgp->lg_seg.length == 0)
1412 goto out;
1413
1414 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1415 true, lgp->lg_layout_type, &ls);
31ef83dc
CH		 1416 if (nfserr) {
1417 trace_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1418 goto out;
31ef83dc 1419 }
9cf514cc 1420
c5c707f9
CH		 1421 nfserr = nfserr_recallconflict;
1422 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1423 goto out_put_stid;
1424
2b0143b5 1425 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1426 current_fh, lgp);
1427 if (nfserr)
1428 goto out_put_stid;
1429
1430 nfserr = nfsd4_insert_layout(lgp, ls);
1431
1432out_put_stid:
cc8a5532 1433 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1434 nfs4_put_stid(&ls->ls_stid);
1435out:
1436 return nfserr;
1437}
1438
34b1744c
BF		 1439static void
1440nfsd4_layoutget_release(union nfsd4_op_u *u)
1441{
1442 kfree(u->layoutget.lg_content);
1443}
1444
9cf514cc
CH		 1445static __be32
1446nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1447 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1448{
eb69853d 1449 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1450 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1451 struct svc_fh *current_fh = &cstate->current_fh;
1452 const struct nfsd4_layout_ops *ops;
1453 loff_t new_size = lcp->lc_last_wr + 1;
1454 struct inode *inode;
1455 struct nfs4_layout_stateid *ls;
1456 __be32 nfserr;
1457
1458 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1459 if (nfserr)
1460 goto out;
1461
1462 nfserr = nfserr_layoutunavailable;
1463 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1464 if (!ops)
1465 goto out;
2b0143b5 1466 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1467
1468 nfserr = nfserr_inval;
1469 if (new_size <= seg->offset) {
1470 dprintk("pnfsd: last write before layout segment\n");
1471 goto out;
1472 }
1473 if (new_size > seg->offset + seg->length) {
1474 dprintk("pnfsd: last write beyond layout segment\n");
1475 goto out;
1476 }
1477 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1478 dprintk("pnfsd: layoutcommit beyond EOF\n");
1479 goto out;
1480 }
1481
1482 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1483 false, lcp->lc_layout_type,
1484 &ls);
1485 if (nfserr) {
31ef83dc 1486 trace_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1487 /* fixup error code as per RFC5661 */
1488 if (nfserr == nfserr_bad_stateid)
1489 nfserr = nfserr_badlayout;
1490 goto out;
1491 }
1492
cc8a5532
JL		 1493 /* LAYOUTCOMMIT does not require any serialization */
1494 mutex_unlock(&ls->ls_mutex);
1495
9cf514cc
CH		 1496 if (new_size > i_size_read(inode)) {
1497 lcp->lc_size_chg = 1;
1498 lcp->lc_newsize = new_size;
1499 } else {
1500 lcp->lc_size_chg = 0;
1501 }
1502
d8398fc1 1503 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1504 nfs4_put_stid(&ls->ls_stid);
1505out:
1506 return nfserr;
1507}
1508
1509static __be32
1510nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 1511 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1512{
eb69853d 1513 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 1514 struct svc_fh *current_fh = &cstate->current_fh;
1515 __be32 nfserr;
1516
1517 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1518 if (nfserr)
1519 goto out;
1520
1521 nfserr = nfserr_layoutunavailable;
1522 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1523 goto out;
1524
1525 switch (lrp->lr_seg.iomode) {
1526 case IOMODE_READ:
1527 case IOMODE_RW:
1528 case IOMODE_ANY:
1529 break;
1530 default:
1531 dprintk("%s: invalid iomode %d\n", __func__,
1532 lrp->lr_seg.iomode);
1533 nfserr = nfserr_inval;
1534 goto out;
1535 }
1536
1537 switch (lrp->lr_return_type) {
1538 case RETURN_FILE:
1539 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1540 break;
1541 case RETURN_FSID:
1542 case RETURN_ALL:
1543 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1544 break;
1545 default:
1546 dprintk("%s: invalid return_type %d\n", __func__,
1547 lrp->lr_return_type);
1548 nfserr = nfserr_inval;
1549 break;
1550 }
1551out:
1552 return nfserr;
1553}
1554#endif /* CONFIG_NFSD_PNFS */
1555
1da177e4
LT		 1556/*
1557 * NULL call.
1558 */
7111c66e 1559static __be32
a6beb732 1560nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 1561{
1562 return nfs_ok;
1563}
1564
e2b20950
SA		 1565static inline void nfsd4_increment_op_stats(u32 opnum)
1566{
1567 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1568 nfsdstats.nfs4_opcount[opnum]++;
1569}
1570
bb2a8b0c 1571static const struct nfsd4_operation nfsd4_ops[];
b591480b 1572
f1c7f79b 1573static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1574
f9bb94c4 1575/*
57716355 1576 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1577 *
57716355
BF		 1578 * Also note, enforced elsewhere:
1579 * - SEQUENCE other than as first op results in
1580 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1581 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1582 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1583 * - DESTROY_SESSION must be the final operation in a compound, if
1584 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1585 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1586 */
57716355 1587static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1588{
57716355
BF		 1589 struct nfsd4_op *op = &args->ops[0];
1590
1591 /* These ordering requirements don't apply to NFSv4.0: */
1592 if (args->minorversion == 0)
1593 return nfs_ok;
1594 /* This is weird, but OK, not our problem: */
1595 if (args->opcnt == 0)
1596 return nfs_ok;
1597 if (op->status == nfserr_op_illegal)
1598 return nfs_ok;
1599 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1600 return nfserr_op_not_in_session;
1601 if (op->opnum == OP_SEQUENCE)
1602 return nfs_ok;
1603 if (args->opcnt != 1)
1604 return nfserr_not_only_op;
1605 return nfs_ok;
f9bb94c4
AA		 1606}
1607
f4f9ef4a 1608const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 1609{
1610 return &nfsd4_ops[op->opnum];
1611}
1612
1091006c
BF		 1613bool nfsd4_cache_this_op(struct nfsd4_op *op)
1614{
e372ba60
BF		 1615 if (op->opnum == OP_ILLEGAL)
1616 return false;
c856694e 1617 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1618}
1619
68d93184
BF		 1620static bool need_wrongsec_check(struct svc_rqst *rqstp)
1621{
1622 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1623 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1624 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1625 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 1626 const struct nfsd4_operation *thisd = OPDESC(this);
1627 const struct nfsd4_operation *nextd;
68d93184 1628
68d93184
BF		 1629 /*
1630 * Most ops check wronsec on our own; only the putfh-like ops
1631 * have special rules.
1632 */
1633 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1634 return false;
1635 /*
1636 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1637 * put-filehandle operation if we're not going to use the
1638 * result:
1639 */
1640 if (argp->opcnt == resp->opcnt)
1641 return false;
51904b08
BF		 1642 if (next->opnum == OP_ILLEGAL)
1643 return false;
68d93184
BF		 1644 nextd = OPDESC(next);
1645 /*
1646 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1647 * errors themselves as necessary; others should check for them
1648 * now:
1649 */
1650 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1651}
1652
2d124dfa
BF		 1653static void svcxdr_init_encode(struct svc_rqst *rqstp,
1654 struct nfsd4_compoundres *resp)
1655{
1656 struct xdr_stream *xdr = &resp->xdr;
1657 struct xdr_buf *buf = &rqstp->rq_res;
1658 struct kvec *head = buf->head;
1659
1660 xdr->buf = buf;
ddd1ea56 1661 xdr->iov = head;
2d124dfa 1662 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1663 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1664 /* Tail and page_len should be zero at this point: */
1665 buf->len = buf->head[0].iov_len;
2825a7f9 1666 xdr->scratch.iov_len = 0;
05638dc7 1667 xdr->page_ptr = buf->pages - 1;
2825a7f9 1668 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1669 - rqstp->rq_auth_slack;
2d124dfa
BF		 1670}
1671
1da177e4
LT		 1672/*
1673 * COMPOUND call.
1674 */
7111c66e 1675static __be32
a6beb732 1676nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 1677{
a6beb732
CH		 1678 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1679 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 1680 struct nfsd4_op *op;
e354d571 1681 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1682 struct svc_fh *current_fh = &cstate->current_fh;
1683 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1684 __be32 status;
1da177e4 1685
2d124dfa 1686 svcxdr_init_encode(rqstp, resp);
4aea24b2 1687 resp->tagp = resp->xdr.p;
1da177e4 1688 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1689 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1690 resp->taglen = args->taglen;
1691 resp->tag = args->tag;
1da177e4 1692 resp->rqstp = rqstp;
4daeed25 1693 cstate->minorversion = args->minorversion;
4daeed25
KM		 1694 fh_init(current_fh, NFS4_FHSIZE);
1695 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1696 /*
1697 * Don't use the deferral mechanism for NFSv4; compounds make it
1698 * too hard to avoid non-idempotency problems.
1699 */
30660e04 1700 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1701
1702 /*
1703 * According to RFC3010, this takes precedence over all other errors.
1704 */
1705 status = nfserr_minor_vers_mismatch;
35f7a14f 1706 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4
LT		 1707 goto out;
1708
57716355
BF		 1709 status = nfs41_check_op_ordering(args);
1710 if (status) {
f9bb94c4 1711 op = &args->ops[0];
57716355 1712 op->status = status;
f9bb94c4
AA		 1713 goto encode_op;
1714 }
1715
1da177e4
LT		 1716 while (!status && resp->opcnt < args->opcnt) {
1717 op = &args->ops[resp->opcnt++];
1718
b001a1b6
BH		 1719 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1720 resp->opcnt, args->opcnt, op->opnum,
1721 nfsd4_op_name(op->opnum));
1da177e4
LT		 1722 /*
1723 * The XDR decode routines may have pre-set op->status;
1724 * for example, if there is a miscellaneous XDR error
1725 * it will be set to nfserr_bad_xdr.
1726 */
9d313b17
BF		 1727 if (op->status) {
1728 if (op->opnum == OP_OPEN)
1729 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1730 goto encode_op;
9d313b17 1731 }
1da177e4 1732
4daeed25 1733 if (!current_fh->fh_dentry) {
f4f9ef4a 1734 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1735 op->status = nfserr_nofilehandle;
1736 goto encode_op;
1737 }
4daeed25 1738 } else if (current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 1739 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1740 op->status = nfserr_moved;
1da177e4
LT		 1741 goto encode_op;
1742 }
b591480b 1743
2336745e
KM		 1744 fh_clear_wcc(current_fh);
1745
58e7b33a 1746 /* If op is non-idempotent */
f4f9ef4a 1747 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1748 /*
a8095f7e
BF		 1749 * Don't execute this op if we couldn't encode a
1750 * succesful reply:
1751 */
f4f9ef4a 1752 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 1753 /*
1754 * Plus if there's another operation, make sure
4c69d585
BF		 1755 * we'll have space to at least encode an error:
1756 */
1757 if (resp->opcnt < args->opcnt)
1758 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1759 op->status = nfsd4_check_resp_size(resp, plen);
1760 }
1761
1762 if (op->status)
1763 goto encode_op;
1764
f4f9ef4a
BF		 1765 if (op->opdesc->op_get_currentstateid)
1766 op->opdesc->op_get_currentstateid(cstate, &op->u);
1767 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1768
9a307403
BF		 1769 /* Only from SEQUENCE */
1770 if (cstate->status == nfserr_replay_cache) {
1771 dprintk("%s NFS4.1 replay from cache\n", __func__);
1772 status = op->status;
1773 goto out;
1774 }
8b70484c 1775 if (!op->status) {
f4f9ef4a
BF		 1776 if (op->opdesc->op_set_currentstateid)
1777 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 1778
f4f9ef4a 1779 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1780 clear_current_stateid(cstate);
8b70484c
TM		 1781
1782 if (need_wrongsec_check(rqstp))
4daeed25 1783 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1784 }
1da177e4 1785encode_op:
a90b061c 1786 if (op->status == nfserr_replay_me) {
a4f1706a 1787 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1788 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1789 status = op->status = op->replay->rp_status;
1790 } else {
1791 nfsd4_encode_operation(resp, op);
1792 status = op->status;
1793 }
0407717d
BH		 1794
1795 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1796 args->ops, args->opcnt, resp->opcnt, op->opnum,
1797 be32_to_cpu(status));
1798
58fb12e6 1799 nfsd4_cstate_clear_replay(cstate);
e2b20950 1800 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1801 }
1802
4daeed25
KM		 1803 cstate->status = status;
1804 fh_put(current_fh);
1805 fh_put(save_fh);
1806 BUG_ON(cstate->replay_owner);
1da177e4 1807out:
2f425878 1808 /* Reset deferral mechanism for RPC deferrals */
30660e04 1809 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1810 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1811 return status;
1812}
1813
58e7b33a
MJ		 1814#define op_encode_hdr_size (2)
1815#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1816#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1817#define op_encode_change_info_maxsz (5)
1818#define nfs4_fattr_bitmap_maxsz (4)
1819
8c7424cf
BF		 1820/* We'll fall back on returning no lockowner if run out of space: */
1821#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1822#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1823
1824#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1825
1826#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1827#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1828 op_encode_ace_maxsz)
1829
1830#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1831
1832static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1833{
1834 return (op_encode_hdr_size) * sizeof(__be32);
1835}
1836
1837static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1838{
1839 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1840}
1841
2282cd2c
KM		 1842static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1843{
1844 /* ac_supported, ac_resp_access */
1845 return (op_encode_hdr_size + 2)* sizeof(__be32);
1846}
1847
58e7b33a
MJ		 1848static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1849{
1850 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1851}
1852
1853static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1854{
1855 return (op_encode_hdr_size + op_encode_change_info_maxsz
1856 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1857}
1858
b86cef60
BF		 1859/*
1860 * Note since this is an idempotent operation we won't insist on failing
1861 * the op prematurely if the estimate is too large. We may turn off splice
1862 * reads unnecessarily.
1863 */
1864static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1865 struct nfsd4_op *op)
1866{
1867 u32 *bmap = op->u.getattr.ga_bmval;
1868 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1869 u32 ret = 0;
1870
1871 if (bmap0 & FATTR4_WORD0_ACL)
1872 return svc_max_payload(rqstp);
1873 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1874 return svc_max_payload(rqstp);
1875
1876 if (bmap1 & FATTR4_WORD1_OWNER) {
1877 ret += IDMAP_NAMESZ + 4;
1878 bmap1 &= ~FATTR4_WORD1_OWNER;
1879 }
1880 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1881 ret += IDMAP_NAMESZ + 4;
1882 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1883 }
1884 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1885 ret += NFS4_FHSIZE + 4;
1886 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1887 }
1888 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 1889 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 1890 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1891 }
1892 /*
1893 * Largest of remaining attributes are 16 bytes (e.g.,
1894 * supported_attributes)
1895 */
1896 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1897 /* bitmask, length */
1898 ret += 20;
1899 return ret;
1900}
1901
2282cd2c
KM		 1902static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1903{
1904 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1905}
1906
58e7b33a
MJ		 1907static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1908{
1909 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1910 * sizeof(__be32);
1911}
1912
1913static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1914{
1915 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1916 * sizeof(__be32);
1917}
1918
1919static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1920{
1921 return (op_encode_hdr_size + op_encode_stateid_maxsz
1922 + op_encode_change_info_maxsz + 1
1923 + nfs4_fattr_bitmap_maxsz
1924 + op_encode_delegation_maxsz) * sizeof(__be32);
1925}
1926
1927static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1928{
1929 u32 maxcount = 0, rlen = 0;
1930
1931 maxcount = svc_max_payload(rqstp);
3c7aa15d 1932 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1933
622f560e 1934 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1935}
1936
1937static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1938{
3c7aa15d 1939 u32 maxcount = 0, rlen = 0;
58e7b33a 1940
3c7aa15d
KM		 1941 maxcount = svc_max_payload(rqstp);
1942 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1943
561f0ed4
BF		 1944 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1945 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1946}
1947
2282cd2c
KM		 1948static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1949{
1950 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1951}
1952
58e7b33a
MJ		 1953static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1954{
1955 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1956 * sizeof(__be32);
1957}
1958
1959static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1960{
1961 return (op_encode_hdr_size + op_encode_change_info_maxsz
1962 + op_encode_change_info_maxsz) * sizeof(__be32);
1963}
1964
ccae70a9
BF		 1965static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1966 struct nfsd4_op *op)
1967{
d1d84c96
BF		 1968 return (op_encode_hdr_size
1969 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1970}
1971
2282cd2c
KM		 1972static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1973{
1974 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1975 * sizeof(__be32);
1976}
1977
58e7b33a
MJ		 1978static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1979{
1980 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1981}
1982
2282cd2c
KM		 1983static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1984{
1985 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1986 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
1987}
1988
58e7b33a
MJ		 1989static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1990{
480efaee
BF		 1991 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1992 sizeof(__be32);
58e7b33a
MJ		 1993}
1994
1995static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1996{
f34e432b 1997 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 1998}
1999
2000static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2001{
2002 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2003 1 + 1 + /* eir_flags, spr_how */\
2004 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2005 2 + /*eir_server_owner.so_minor_id */\
2006 /* eir_server_owner.so_major_id<> */\
2007 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2008 /* eir_server_scope<> */\
2009 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2010 1 + /* eir_server_impl_id array length */\
2011 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2012}
2013
2014static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2015{
2016 return (op_encode_hdr_size + \
2017 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2018 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2019}
2020
2021static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2022{
2023 return (op_encode_hdr_size + \
2024 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2025 2 + /* csr_sequence, csr_flags */\
2026 op_encode_channel_attrs_maxsz + \
2027 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2028}
2029
29ae7f9d
AS		 2030static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2031{
2032 return (op_encode_hdr_size +
2033 1 /* wr_callback */ +
2034 op_encode_stateid_maxsz /* wr_callback */ +
2035 2 /* wr_count */ +
2036 1 /* wr_committed */ +
2037 op_encode_verifier_maxsz +
2038 1 /* cr_consecutive */ +
2039 1 /* cr_synchronous */) * sizeof(__be32);
2040}
2041
9cf514cc 2042#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2043static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2044{
2045 u32 maxcount = 0, rlen = 0;
2046
2047 maxcount = svc_max_payload(rqstp);
2048 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2049
2050 return (op_encode_hdr_size +
2051 1 /* gd_layout_type*/ +
2052 XDR_QUADLEN(rlen) +
2053 2 /* gd_notify_types */) * sizeof(__be32);
2054}
2055
9cf514cc
CH		 2056/*
2057 * At this stage we don't really know what layout driver will handle the request,
2058 * so we need to define an arbitrary upper bound here.
2059 */
2060#define MAX_LAYOUT_SIZE 128
2061static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2062{
2063 return (op_encode_hdr_size +
2064 1 /* logr_return_on_close */ +
2065 op_encode_stateid_maxsz +
2066 1 /* nr of layouts */ +
2067 MAX_LAYOUT_SIZE) * sizeof(__be32);
2068}
2069
2070static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2071{
2072 return (op_encode_hdr_size +
2073 1 /* locr_newsize */ +
2074 2 /* ns_size */) * sizeof(__be32);
2075}
2076
2077static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2078{
2079 return (op_encode_hdr_size +
2080 1 /* lrs_stateid */ +
2081 op_encode_stateid_maxsz) * sizeof(__be32);
2082}
2083#endif /* CONFIG_NFSD_PNFS */
2084
2282cd2c
KM		 2085
2086static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2087{
2088 return (op_encode_hdr_size + 3) * sizeof(__be32);
2089}
2090
bb2a8b0c 2091static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2092 [OP_ACCESS] = {
eb69853d 2093 .op_func = nfsd4_access,
b001a1b6 2094 .op_name = "OP_ACCESS",
1c122638 2095 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2096 },
2097 [OP_CLOSE] = {
eb69853d 2098 .op_func = nfsd4_close,
58e7b33a 2099 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2100 .op_name = "OP_CLOSE",
1c122638 2101 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2102 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2103 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2104 },
2105 [OP_COMMIT] = {
eb69853d 2106 .op_func = nfsd4_commit,
58e7b33a 2107 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2108 .op_name = "OP_COMMIT",
1c122638 2109 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2110 },
2111 [OP_CREATE] = {
eb69853d 2112 .op_func = nfsd4_create,
d1471053 2113 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2114 .op_name = "OP_CREATE",
1c122638 2115 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2116 },
2117 [OP_DELEGRETURN] = {
eb69853d 2118 .op_func = nfsd4_delegreturn,
58e7b33a 2119 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2120 .op_name = "OP_DELEGRETURN",
58e7b33a 2121 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2122 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2123 },
2124 [OP_GETATTR] = {
eb69853d 2125 .op_func = nfsd4_getattr,
eeac294e 2126 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2127 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2128 .op_name = "OP_GETATTR",
b591480b
BF		 2129 },
2130 [OP_GETFH] = {
eb69853d 2131 .op_func = nfsd4_getfh,
b001a1b6 2132 .op_name = "OP_GETFH",
1c122638 2133 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2134 },
2135 [OP_LINK] = {
eb69853d 2136 .op_func = nfsd4_link,
c856694e
BF		 2137 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2138 | OP_CACHEME,
b001a1b6 2139 .op_name = "OP_LINK",
1c122638 2140 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2141 },
2142 [OP_LOCK] = {
eb69853d 2143 .op_func = nfsd4_lock,
58e7b33a 2144 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2145 .op_name = "OP_LOCK",
1c122638 2146 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2147 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2148 },
2149 [OP_LOCKT] = {
eb69853d 2150 .op_func = nfsd4_lockt,
b001a1b6 2151 .op_name = "OP_LOCKT",
1c122638 2152 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2153 },
2154 [OP_LOCKU] = {
eb69853d 2155 .op_func = nfsd4_locku,
58e7b33a 2156 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2157 .op_name = "OP_LOCKU",
1c122638 2158 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2159 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2160 },
2161 [OP_LOOKUP] = {
eb69853d 2162 .op_func = nfsd4_lookup,
d1471053 2163 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2164 .op_name = "OP_LOOKUP",
1c122638 2165 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2166 },
2167 [OP_LOOKUPP] = {
eb69853d 2168 .op_func = nfsd4_lookupp,
d1471053 2169 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2170 .op_name = "OP_LOOKUPP",
1c122638 2171 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2172 },
2173 [OP_NVERIFY] = {
eb69853d 2174 .op_func = nfsd4_nverify,
b001a1b6 2175 .op_name = "OP_NVERIFY",
1c122638 2176 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2177 },
2178 [OP_OPEN] = {
eb69853d 2179 .op_func = nfsd4_open,
58e7b33a 2180 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2181 .op_name = "OP_OPEN",
1c122638 2182 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2183 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2184 },
2185 [OP_OPEN_CONFIRM] = {
eb69853d 2186 .op_func = nfsd4_open_confirm,
58e7b33a 2187 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2188 .op_name = "OP_OPEN_CONFIRM",
1c122638 2189 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2190 },
2191 [OP_OPEN_DOWNGRADE] = {
eb69853d 2192 .op_func = nfsd4_open_downgrade,
58e7b33a 2193 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2194 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2195 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2196 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2197 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2198 },
2199 [OP_PUTFH] = {
eb69853d 2200 .op_func = nfsd4_putfh,
68d93184 2201 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2202 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2203 .op_name = "OP_PUTFH",
1c122638 2204 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2205 },
eeac294e 2206 [OP_PUTPUBFH] = {
eb69853d 2207 .op_func = nfsd4_putrootfh,
68d93184 2208 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2209 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2210 .op_name = "OP_PUTPUBFH",
1c122638 2211 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2212 },
b591480b 2213 [OP_PUTROOTFH] = {
eb69853d 2214 .op_func = nfsd4_putrootfh,
68d93184 2215 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2216 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2217 .op_name = "OP_PUTROOTFH",
1c122638 2218 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2219 },
2220 [OP_READ] = {
eb69853d 2221 .op_func = nfsd4_read,
34b1744c 2222 .op_release = nfsd4_read_release,
b001a1b6 2223 .op_name = "OP_READ",
1c122638 2224 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2225 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2226 },
2227 [OP_READDIR] = {
eb69853d 2228 .op_func = nfsd4_readdir,
b001a1b6 2229 .op_name = "OP_READDIR",
1c122638 2230 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2231 },
2232 [OP_READLINK] = {
eb69853d 2233 .op_func = nfsd4_readlink,
b001a1b6 2234 .op_name = "OP_READLINK",
1c122638 2235 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2236 },
2237 [OP_REMOVE] = {
eb69853d 2238 .op_func = nfsd4_remove,
c856694e 2239 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2240 .op_name = "OP_REMOVE",
1c122638 2241 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2242 },
2243 [OP_RENAME] = {
eb69853d 2244 .op_func = nfsd4_rename,
c856694e 2245 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2246 .op_name = "OP_RENAME",
1c122638 2247 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2248 },
2249 [OP_RENEW] = {
eb69853d 2250 .op_func = nfsd4_renew,
58e7b33a
MJ		 2251 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2252 | OP_MODIFIES_SOMETHING,
b001a1b6 2253 .op_name = "OP_RENEW",
1c122638 2254 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2255
b591480b
BF		 2256 },
2257 [OP_RESTOREFH] = {
eb69853d 2258 .op_func = nfsd4_restorefh,
68d93184 2259 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2260 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2261 .op_name = "OP_RESTOREFH",
1c122638 2262 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2263 },
2264 [OP_SAVEFH] = {
eb69853d 2265 .op_func = nfsd4_savefh,
58e7b33a 2266 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2267 .op_name = "OP_SAVEFH",
1c122638 2268 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2269 },
dcb488a3 2270 [OP_SECINFO] = {
eb69853d 2271 .op_func = nfsd4_secinfo,
34b1744c 2272 .op_release = nfsd4_secinfo_release,
68d93184 2273 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2274 .op_name = "OP_SECINFO",
1c122638 2275 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2276 },
b591480b 2277 [OP_SETATTR] = {
eb69853d 2278 .op_func = nfsd4_setattr,
b001a1b6 2279 .op_name = "OP_SETATTR",
c856694e 2280 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1c122638 2281 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 2282 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 2283 },
2284 [OP_SETCLIENTID] = {
eb69853d 2285 .op_func = nfsd4_setclientid,
58e7b33a 2286 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2287 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2288 .op_name = "OP_SETCLIENTID",
1c122638 2289 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 2290 },
2291 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 2292 .op_func = nfsd4_setclientid_confirm,
58e7b33a 2293 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2294 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2295 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 2296 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2297 },
2298 [OP_VERIFY] = {
eb69853d 2299 .op_func = nfsd4_verify,
b001a1b6 2300 .op_name = "OP_VERIFY",
1c122638 2301 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2302 },
2303 [OP_WRITE] = {
eb69853d 2304 .op_func = nfsd4_write,
c856694e 2305 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2306 .op_name = "OP_WRITE",
1c122638 2307 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 2308 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 2309 },
2310 [OP_RELEASE_LOCKOWNER] = {
eb69853d 2311 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 2312 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2313 | OP_MODIFIES_SOMETHING,
b001a1b6 2314 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 2315 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2316 },
069b6ad4
AA		 2317
2318 /* NFSv4.1 operations */
2319 [OP_EXCHANGE_ID] = {
eb69853d 2320 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 2321 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2322 | OP_MODIFIES_SOMETHING,
069b6ad4 2323 .op_name = "OP_EXCHANGE_ID",
1c122638 2324 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 2325 },
cb73a9f4 2326 [OP_BACKCHANNEL_CTL] = {
eb69853d 2327 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 2328 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2329 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 2330 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 2331 },
1d1bc8f2 2332 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 2333 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2334 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2335 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2336 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 2337 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2338 },
069b6ad4 2339 [OP_CREATE_SESSION] = {
eb69853d 2340 .op_func = nfsd4_create_session,
58e7b33a
MJ		 2341 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2342 | OP_MODIFIES_SOMETHING,
069b6ad4 2343 .op_name = "OP_CREATE_SESSION",
1c122638 2344 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 2345 },
2346 [OP_DESTROY_SESSION] = {
eb69853d 2347 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 2348 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2349 | OP_MODIFIES_SOMETHING,
069b6ad4 2350 .op_name = "OP_DESTROY_SESSION",
1c122638 2351 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 2352 },
2353 [OP_SEQUENCE] = {
eb69853d 2354 .op_func = nfsd4_sequence,
f9bb94c4 2355 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2356 .op_name = "OP_SEQUENCE",
1c122638 2357 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 2358 },
094b5d74 2359 [OP_DESTROY_CLIENTID] = {
eb69853d 2360 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 2361 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2362 | OP_MODIFIES_SOMETHING,
094b5d74 2363 .op_name = "OP_DESTROY_CLIENTID",
1c122638 2364 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 2365 },
4dc6ec00 2366 [OP_RECLAIM_COMPLETE] = {
eb69853d 2367 .op_func = nfsd4_reclaim_complete,
58e7b33a 2368 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2369 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 2370 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 2371 },
04f4ad16 2372 [OP_SECINFO_NO_NAME] = {
eb69853d 2373 .op_func = nfsd4_secinfo_no_name,
34b1744c 2374 .op_release = nfsd4_secinfo_release,
68d93184 2375 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2376 .op_name = "OP_SECINFO_NO_NAME",
1c122638 2377 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 2378 },
17456804 2379 [OP_TEST_STATEID] = {
eb69853d 2380 .op_func = nfsd4_test_stateid,
17456804
BS		 2381 .op_flags = ALLOWED_WITHOUT_FH,
2382 .op_name = "OP_TEST_STATEID",
1c122638 2383 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 2384 },
e1ca12df 2385 [OP_FREE_STATEID] = {
eb69853d 2386 .op_func = nfsd4_free_stateid,
58e7b33a 2387 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2388 .op_name = "OP_FREE_STATEID",
57832e7b 2389 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 2390 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 2391 },
9cf514cc
CH		 2392#ifdef CONFIG_NFSD_PNFS
2393 [OP_GETDEVICEINFO] = {
eb69853d 2394 .op_func = nfsd4_getdeviceinfo,
34b1744c 2395 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 2396 .op_flags = ALLOWED_WITHOUT_FH,
2397 .op_name = "OP_GETDEVICEINFO",
1c122638 2398 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 2399 },
2400 [OP_LAYOUTGET] = {
eb69853d 2401 .op_func = nfsd4_layoutget,
34b1744c 2402 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 2403 .op_flags = OP_MODIFIES_SOMETHING,
2404 .op_name = "OP_LAYOUTGET",
1c122638 2405 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 2406 },
2407 [OP_LAYOUTCOMMIT] = {
eb69853d 2408 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 2409 .op_flags = OP_MODIFIES_SOMETHING,
2410 .op_name = "OP_LAYOUTCOMMIT",
1c122638 2411 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 2412 },
2413 [OP_LAYOUTRETURN] = {
eb69853d 2414 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 2415 .op_flags = OP_MODIFIES_SOMETHING,
2416 .op_name = "OP_LAYOUTRETURN",
1c122638 2417 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 2418 },
2419#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2420
2421 /* NFSv4.2 operations */
95d871f0 2422 [OP_ALLOCATE] = {
eb69853d 2423 .op_func = nfsd4_allocate,
95d871f0
AS		 2424 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2425 .op_name = "OP_ALLOCATE",
1c122638 2426 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 2427 },
b0cb9085 2428 [OP_DEALLOCATE] = {
eb69853d 2429 .op_func = nfsd4_deallocate,
b0cb9085
AS		 2430 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2431 .op_name = "OP_DEALLOCATE",
1c122638 2432 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 2433 },
ffa0160a 2434 [OP_CLONE] = {
eb69853d 2435 .op_func = nfsd4_clone,
ffa0160a
CH		 2436 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2437 .op_name = "OP_CLONE",
1c122638 2438 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 2439 },
29ae7f9d 2440 [OP_COPY] = {
eb69853d 2441 .op_func = nfsd4_copy,
29ae7f9d
AS		 2442 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2443 .op_name = "OP_COPY",
1c122638 2444 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 2445 },
24bab491 2446 [OP_SEEK] = {
eb69853d 2447 .op_func = nfsd4_seek,
24bab491 2448 .op_name = "OP_SEEK",
1c122638 2449 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 2450 },
b591480b
BF		 2451};
2452
ed941643
AE		 2453/**
2454 * nfsd4_spo_must_allow - Determine if the compound op contains an
2455 * operation that is allowed to be sent with machine credentials
2456 *
2457 * @rqstp: a pointer to the struct svc_rqst
2458 *
2459 * Checks to see if the compound contains a spo_must_allow op
2460 * and confirms that it was sent with the proper machine creds.
2461 */
2462
2463bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2464{
2465 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2466 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2467 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2468 struct nfsd4_compound_state *cstate = &resp->cstate;
2469 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2470 u32 opiter;
2471
2472 if (!cstate->minorversion)
2473 return false;
2474
2475 if (cstate->spo_must_allowed == true)
2476 return true;
2477
2478 opiter = resp->opcnt;
2479 while (opiter < argp->opcnt) {
2480 this = &argp->ops[opiter++];
2481 if (test_bit(this->opnum, allow->u.longs) &&
2482 cstate->clp->cl_mach_cred &&
2483 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2484 cstate->spo_must_allowed = true;
2485 return true;
2486 }
2487 }
2488 cstate->spo_must_allowed = false;
2489 return false;
2490}
2491
4f0cefbf
BF		 2492int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2493{
05b7278d 2494 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 2495 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 2496
2497 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2498 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 2499}
2500
07d1f802
BF		 2501void warn_on_nonidempotent_op(struct nfsd4_op *op)
2502{
2503 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2504 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2505 op->opnum, nfsd4_op_name(op->opnum));
2506 WARN_ON_ONCE(1);
2507 }
2508}
2509
f1c7f79b 2510static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2511{
2512 if (opnum < ARRAY_SIZE(nfsd4_ops))
2513 return nfsd4_ops[opnum].op_name;
2514 return "unknown_operation";
2515}
2516
1da177e4 2517#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2518struct nfsd4_voidargs { int dummy; };
2519
860bda29 2520static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 2521 [NFSPROC4_NULL] = {
f7235b6b 2522 .pc_func = nfsd4_proc_null,
63f8de37 2523 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 2524 .pc_argsize = sizeof(struct nfsd4_voidargs),
2525 .pc_ressize = sizeof(struct nfsd4_voidres),
2526 .pc_cachetype = RC_NOCACHE,
2527 .pc_xdrressize = 1,
2528 },
2529 [NFSPROC4_COMPOUND] = {
f7235b6b 2530 .pc_func = nfsd4_proc_compound,
026fec7e 2531 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 2532 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 2533 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2534 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2535 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2536 .pc_cachetype = RC_NOCACHE,
2537 .pc_xdrressize = NFSD_BUFSIZE/4,
2538 },
1da177e4
LT		 2539};
2540
7fd38af9 2541static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 2542const struct svc_version nfsd_version4 = {
5283b03e
JL		 2543 .vs_vers = 4,
2544 .vs_nproc = 2,
2545 .vs_proc = nfsd_procedures4,
7fd38af9 2546 .vs_count = nfsd_count3,
5283b03e
JL		 2547 .vs_dispatch = nfsd_dispatch,
2548 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2549 .vs_rpcb_optnl = true,
2550 .vs_need_cong_ctrl = true,
1da177e4
LT		 2551};
2552
2553/*
2554 * Local variables:
2555 * c-basic-offset: 8
2556 * End:
2557 */
Michael's Linux tree.