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nfsd4: properly type op_func callbacks
[people/ms/linux.git] / fs / nfsd / nfs4proc.c
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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
7191155b 787static __be32
ca364317 788nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 789 union nfsd4_op_u *u)
1da177e4 790{
eb69853d 791 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 792 u64 cookie = readdir->rd_cookie;
793 static const nfs4_verifier zeroverf;
794
795 /* no need to check permission - this will be done in nfsd_readdir() */
796
797 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
798 return nfserr_inval;
799
916d2d84
BF		 800 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
801 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
802 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 803
832023bf 804 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 805 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
806 return nfserr_bad_cookie;
807
808 readdir->rd_rqstp = rqstp;
ca364317 809 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 810 return nfs_ok;
811}
812
7191155b 813static __be32
ca364317 814nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 815 union nfsd4_op_u *u)
1da177e4 816{
eb69853d
CH		 817 u->readlink.rl_rqstp = rqstp;
818 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 819 return nfs_ok;
820}
821
7191155b 822static __be32
ca364317 823nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 824 union nfsd4_op_u *u)
1da177e4 825{
eb69853d 826 struct nfsd4_remove *remove = &u->remove;
b37ad28b 827 __be32 status;
1da177e4 828
c87fb4a3 829 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 830 return nfserr_grace;
ca364317
BF		 831 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
832 remove->rm_name, remove->rm_namelen);
1da177e4 833 if (!status) {
ca364317
BF		 834 fh_unlock(&cstate->current_fh);
835 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 836 }
837 return status;
838}
839
7191155b 840static __be32
ca364317 841nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 842 union nfsd4_op_u *u)
1da177e4 843{
eb69853d 844 struct nfsd4_rename *rename = &u->rename;
b37ad28b 845 __be32 status = nfserr_nofilehandle;
1da177e4 846
ca364317 847 if (!cstate->save_fh.fh_dentry)
1da177e4 848 return status;
c87fb4a3 849 if (opens_in_grace(SVC_NET(rqstp)) &&
5ccb0066 850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
c815afc7 851 return nfserr_grace;
ca364317
BF		 852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
853 rename->rn_snamelen, &cstate->current_fh,
1da177e4 854 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 855 if (status)
856 return status;
857 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
858 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
859 return nfs_ok;
1da177e4
LT		 860}
861
dcb488a3
AA		 862static __be32
863nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 864 union nfsd4_op_u *u)
dcb488a3 865{
eb69853d 866 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 867 struct svc_export *exp;
868 struct dentry *dentry;
869 __be32 err;
870
29a78a3e
BF		 871 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
872 if (err)
873 return err;
dcb488a3
AA		 874 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
875 secinfo->si_name, secinfo->si_namelen,
876 &exp, &dentry);
877 if (err)
878 return err;
2f6fc056 879 fh_unlock(&cstate->current_fh);
2b0143b5 880 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 881 exp_put(exp);
882 err = nfserr_noent;
883 } else
884 secinfo->si_exp = exp;
885 dput(dentry);
56560b9a
BF		 886 if (cstate->minorversion)
887 /* See rfc 5661 section 2.6.3.1.1.8 */
888 fh_put(&cstate->current_fh);
dcb488a3
AA		 889 return err;
890}
891
04f4ad16
BF		 892static __be32
893nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 894 union nfsd4_op_u *u)
04f4ad16
BF		 895{
896 __be32 err;
897
eb69853d 898 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 899 case NFS4_SECINFO_STYLE4_CURRENT_FH:
900 break;
901 case NFS4_SECINFO_STYLE4_PARENT:
902 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
903 if (err)
904 return err;
905 break;
906 default:
907 return nfserr_inval;
908 }
bf18f163 909
eb69853d 910 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 911 fh_put(&cstate->current_fh);
912 return nfs_ok;
913}
914
7191155b 915static __be32
ca364317 916nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 917 union nfsd4_op_u *u)
1da177e4 918{
eb69853d 919 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 920 __be32 status = nfs_ok;
96f6f985 921 int err;
1da177e4 922
1da177e4 923 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 924 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed
AS		 925 &cstate->current_fh, &setattr->sa_stateid,
926 WR_STATE, NULL, NULL);
375c5547 927 if (status) {
3e3b4800 928 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 929 return status;
930 }
1da177e4 931 }
96f6f985
AV		 932 err = fh_want_write(&cstate->current_fh);
933 if (err)
934 return nfserrno(err);
1da177e4 935 status = nfs_ok;
3c8e0316
YZ		 936
937 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
938 nfsd_attrmask);
939 if (status)
940 goto out;
941
1da177e4 942 if (setattr->sa_acl != NULL)
ca364317
BF		 943 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
944 setattr->sa_acl);
1da177e4 945 if (status)
18f335af 946 goto out;
18032ca0
DQ		 947 if (setattr->sa_label.len)
948 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
949 &setattr->sa_label);
950 if (status)
951 goto out;
ca364317 952 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 953 0, (time_t)0);
18f335af 954out:
bad0dcff 955 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 956 return status;
957}
958
ffe1137b
BF		 959static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
960{
961 int i = 1;
962 int buflen = write->wr_buflen;
963
964 vec[0].iov_base = write->wr_head.iov_base;
965 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
966 buflen -= vec[0].iov_len;
967
968 while (buflen) {
969 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
970 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
971 buflen -= vec[i].iov_len;
972 i++;
973 }
974 return i;
975}
976
7191155b 977static __be32
ca364317 978nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 979 union nfsd4_op_u *u)
1da177e4 980{
eb69853d 981 struct nfsd4_write *write = &u->write;
1da177e4
LT		 982 stateid_t *stateid = &write->wr_stateid;
983 struct file *filp = NULL;
b37ad28b 984 __be32 status = nfs_ok;
31dec253 985 unsigned long cnt;
ffe1137b 986 int nvecs;
1da177e4 987
1da177e4
LT		 988 if (write->wr_offset >= OFFSET_MAX)
989 return nfserr_inval;
990
aa0d6aed
AS		 991 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
992 stateid, WR_STATE, &filp, NULL);
375c5547
BF		 993 if (status) {
994 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
995 return status;
996 }
997
31dec253 998 cnt = write->wr_buflen;
1da177e4 999 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1000 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1001
ffe1137b
BF		 1002 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1003 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1004
af90f707
CH		 1005 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1006 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 1007 write->wr_how_written);
af90f707 1008 fput(filp);
1da177e4 1009
31dec253
DS		 1010 write->wr_bytes_written = cnt;
1011
1da177e4 1012 return status;
1da177e4
LT		 1013}
1014
ffa0160a 1015static __be32
29ae7f9d
AS		 1016nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1017 stateid_t *src_stateid, struct file **src,
1018 stateid_t *dst_stateid, struct file **dst)
ffa0160a 1019{
ffa0160a
CH		 1020 __be32 status;
1021
1022 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
29ae7f9d 1023 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1024 if (status) {
1025 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1026 goto out;
1027 }
1028
1029 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
29ae7f9d 1030 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1031 if (status) {
1032 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1033 goto out_put_src;
1034 }
1035
1036 /* fix up for NFS-specific error code */
29ae7f9d
AS		 1037 if (!S_ISREG(file_inode(*src)->i_mode) ||
1038 !S_ISREG(file_inode(*dst)->i_mode)) {
ffa0160a
CH		 1039 status = nfserr_wrong_type;
1040 goto out_put_dst;
1041 }
1042
29ae7f9d
AS		 1043out:
1044 return status;
1045out_put_dst:
1046 fput(*dst);
1047out_put_src:
1048 fput(*src);
1049 goto out;
1050}
1051
1052static __be32
1053nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1054 union nfsd4_op_u *u)
29ae7f9d 1055{
eb69853d 1056 struct nfsd4_clone *clone = &u->clone;
29ae7f9d
AS		 1057 struct file *src, *dst;
1058 __be32 status;
1059
1060 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1061 &clone->cl_dst_stateid, &dst);
1062 if (status)
1063 goto out;
1064
ffa0160a
CH		 1065 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1066 dst, clone->cl_dst_pos, clone->cl_count);
1067
ffa0160a 1068 fput(dst);
ffa0160a
CH		 1069 fput(src);
1070out:
1071 return status;
1072}
1073
29ae7f9d
AS		 1074static __be32
1075nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1076 union nfsd4_op_u *u)
29ae7f9d 1077{
eb69853d 1078 struct nfsd4_copy *copy = &u->copy;
29ae7f9d
AS		 1079 struct file *src, *dst;
1080 __be32 status;
1081 ssize_t bytes;
1082
1083 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1084 &copy->cp_dst_stateid, &dst);
1085 if (status)
1086 goto out;
1087
1088 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1089 dst, copy->cp_dst_pos, copy->cp_count);
1090
1091 if (bytes < 0)
1092 status = nfserrno(bytes);
1093 else {
1094 copy->cp_res.wr_bytes_written = bytes;
1095 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1096 copy->cp_consecutive = 1;
1097 copy->cp_synchronous = 1;
1098 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1099 status = nfs_ok;
1100 }
1101
1102 fput(src);
1103 fput(dst);
1104out:
1105 return status;
1106}
1107
95d871f0
AS		 1108static __be32
1109nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1110 struct nfsd4_fallocate *fallocate, int flags)
1111{
1112 __be32 status = nfserr_notsupp;
1113 struct file *file;
1114
aa0d6aed 1115 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1116 &fallocate->falloc_stateid,
af90f707 1117 WR_STATE, &file, NULL);
95d871f0
AS		 1118 if (status != nfs_ok) {
1119 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1120 return status;
1121 }
1122
1123 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1124 fallocate->falloc_offset,
1125 fallocate->falloc_length,
1126 flags);
1127 fput(file);
1128 return status;
1129}
1130
1131static __be32
1132nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1133 union nfsd4_op_u *u)
95d871f0 1134{
eb69853d 1135 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1136}
1137
b0cb9085
AS		 1138static __be32
1139nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1140 union nfsd4_op_u *u)
b0cb9085 1141{
eb69853d 1142 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1143 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1144}
1145
24bab491
AS		 1146static __be32
1147nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1148 union nfsd4_op_u *u)
24bab491 1149{
eb69853d 1150 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1151 int whence;
1152 __be32 status;
1153 struct file *file;
1154
aa0d6aed 1155 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1156 &seek->seek_stateid,
af90f707 1157 RD_STATE, &file, NULL);
24bab491
AS		 1158 if (status) {
1159 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1160 return status;
1161 }
1162
1163 switch (seek->seek_whence) {
1164 case NFS4_CONTENT_DATA:
1165 whence = SEEK_DATA;
1166 break;
1167 case NFS4_CONTENT_HOLE:
1168 whence = SEEK_HOLE;
1169 break;
1170 default:
1171 status = nfserr_union_notsupp;
1172 goto out;
1173 }
1174
1175 /*
1176 * Note: This call does change file->f_pos, but nothing in NFSD
1177 * should ever file->f_pos.
1178 */
1179 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1180 if (seek->seek_pos < 0)
1181 status = nfserrno(seek->seek_pos);
1182 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1183 seek->seek_eof = true;
1184
1185out:
1186 fput(file);
1187 return status;
1188}
1189
1da177e4
LT		 1190/* This routine never returns NFS_OK! If there are no other errors, it
1191 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1192 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1193 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1194 */
b37ad28b 1195static __be32
c954e2a5 1196_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1197 struct nfsd4_verify *verify)
1da177e4 1198{
2ebbc012 1199 __be32 *buf, *p;
1da177e4 1200 int count;
b37ad28b 1201 __be32 status;
1da177e4 1202
8837abca 1203 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1204 if (status)
1205 return status;
1206
3c8e0316
YZ		 1207 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1208 if (status)
1209 return status;
1210
1da177e4
LT		 1211 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1212 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1213 return nfserr_inval;
1214 if (verify->ve_attrlen & 3)
1215 return nfserr_inval;
1216
1217 /* count in words:
1218 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1219 */
1220 count = 4 + (verify->ve_attrlen >> 2);
1221 buf = kmalloc(count << 2, GFP_KERNEL);
1222 if (!buf)
3e772463 1223 return nfserr_jukebox;
1da177e4 1224
84822d0b 1225 p = buf;
d5184658 1226 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1227 cstate->current_fh.fh_export,
d5184658
BF		 1228 cstate->current_fh.fh_dentry,
1229 verify->ve_bmval,
406a7ea9 1230 rqstp, 0);
41ae6e71
BF		 1231 /*
1232 * If nfsd4_encode_fattr() ran out of space, assume that's because
1233 * the attributes are longer (hence different) than those given:
1234 */
84822d0b 1235 if (status == nfserr_resource)
1da177e4
LT		 1236 status = nfserr_not_same;
1237 if (status)
1238 goto out_kfree;
1239
95ec28cd
BH		 1240 /* skip bitmap */
1241 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1242 status = nfserr_not_same;
1243 if (ntohl(*p++) != verify->ve_attrlen)
1244 goto out_kfree;
1245 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1246 status = nfserr_same;
1247
1248out_kfree:
1249 kfree(buf);
1250 return status;
1251}
1252
c954e2a5
BF		 1253static __be32
1254nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1255 union nfsd4_op_u *u)
c954e2a5
BF		 1256{
1257 __be32 status;
1258
eb69853d 1259 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1260 return status == nfserr_not_same ? nfs_ok : status;
1261}
1262
1263static __be32
1264nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1265 union nfsd4_op_u *u)
c954e2a5
BF		 1266{
1267 __be32 status;
1268
eb69853d 1269 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1270 return status == nfserr_same ? nfs_ok : status;
1271}
1272
9cf514cc
CH		 1273#ifdef CONFIG_NFSD_PNFS
1274static const struct nfsd4_layout_ops *
1275nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1276{
8a4c3926 1277 if (!exp->ex_layout_types) {
9cf514cc
CH		 1278 dprintk("%s: export does not support pNFS\n", __func__);
1279 return NULL;
1280 }
1281
b550a32e
AK		 1282 if (layout_type >= LAYOUT_TYPE_MAX ||
1283 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1284 dprintk("%s: layout type %d not supported\n",
1285 __func__, layout_type);
1286 return NULL;
1287 }
1288
1289 return nfsd4_layout_ops[layout_type];
1290}
1291
1292static __be32
1293nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1294 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1295{
eb69853d 1296 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1297 const struct nfsd4_layout_ops *ops;
1298 struct nfsd4_deviceid_map *map;
1299 struct svc_export *exp;
1300 __be32 nfserr;
1301
1302 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1303 __func__,
1304 gdp->gd_layout_type,
1305 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1306 gdp->gd_maxcount);
1307
1308 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1309 if (!map) {
1310 dprintk("%s: couldn't find device ID to export mapping!\n",
1311 __func__);
1312 return nfserr_noent;
1313 }
1314
1315 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1316 if (IS_ERR(exp)) {
1317 dprintk("%s: could not find device id\n", __func__);
1318 return nfserr_noent;
1319 }
1320
1321 nfserr = nfserr_layoutunavailable;
1322 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1323 if (!ops)
1324 goto out;
1325
1326 nfserr = nfs_ok;
f99d4fbd
CH		 1327 if (gdp->gd_maxcount != 0) {
1328 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1329 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1330 }
9cf514cc
CH		 1331
1332 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1333out:
a1420384 1334 exp_put(exp);
9cf514cc
CH		 1335 return nfserr;
1336}
1337
1338static __be32
1339nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1340 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1341{
eb69853d 1342 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1343 struct svc_fh *current_fh = &cstate->current_fh;
1344 const struct nfsd4_layout_ops *ops;
1345 struct nfs4_layout_stateid *ls;
1346 __be32 nfserr;
1347 int accmode;
1348
1349 switch (lgp->lg_seg.iomode) {
1350 case IOMODE_READ:
1351 accmode = NFSD_MAY_READ;
1352 break;
1353 case IOMODE_RW:
1354 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1355 break;
1356 default:
1357 dprintk("%s: invalid iomode %d\n",
1358 __func__, lgp->lg_seg.iomode);
1359 nfserr = nfserr_badiomode;
1360 goto out;
1361 }
1362
1363 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1364 if (nfserr)
1365 goto out;
1366
1367 nfserr = nfserr_layoutunavailable;
1368 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1369 if (!ops)
1370 goto out;
1371
1372 /*
1373 * Verify minlength and range as per RFC5661:
1374 * o If loga_length is less than loga_minlength,
1375 * the metadata server MUST return NFS4ERR_INVAL.
1376 * o If the sum of loga_offset and loga_minlength exceeds
1377 * NFS4_UINT64_MAX, and loga_minlength is not
1378 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1379 * o If the sum of loga_offset and loga_length exceeds
1380 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1381 * the error NFS4ERR_INVAL MUST result.
1382 */
1383 nfserr = nfserr_inval;
1384 if (lgp->lg_seg.length < lgp->lg_minlength ||
1385 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1386 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1387 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1388 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1389 goto out;
1390 if (lgp->lg_seg.length == 0)
1391 goto out;
1392
1393 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1394 true, lgp->lg_layout_type, &ls);
31ef83dc
CH		 1395 if (nfserr) {
1396 trace_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1397 goto out;
31ef83dc 1398 }
9cf514cc 1399
c5c707f9
CH		 1400 nfserr = nfserr_recallconflict;
1401 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1402 goto out_put_stid;
1403
2b0143b5 1404 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1405 current_fh, lgp);
1406 if (nfserr)
1407 goto out_put_stid;
1408
1409 nfserr = nfsd4_insert_layout(lgp, ls);
1410
1411out_put_stid:
cc8a5532 1412 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1413 nfs4_put_stid(&ls->ls_stid);
1414out:
1415 return nfserr;
1416}
1417
1418static __be32
1419nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1420 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1421{
eb69853d 1422 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1423 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1424 struct svc_fh *current_fh = &cstate->current_fh;
1425 const struct nfsd4_layout_ops *ops;
1426 loff_t new_size = lcp->lc_last_wr + 1;
1427 struct inode *inode;
1428 struct nfs4_layout_stateid *ls;
1429 __be32 nfserr;
1430
1431 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1432 if (nfserr)
1433 goto out;
1434
1435 nfserr = nfserr_layoutunavailable;
1436 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1437 if (!ops)
1438 goto out;
2b0143b5 1439 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1440
1441 nfserr = nfserr_inval;
1442 if (new_size <= seg->offset) {
1443 dprintk("pnfsd: last write before layout segment\n");
1444 goto out;
1445 }
1446 if (new_size > seg->offset + seg->length) {
1447 dprintk("pnfsd: last write beyond layout segment\n");
1448 goto out;
1449 }
1450 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1451 dprintk("pnfsd: layoutcommit beyond EOF\n");
1452 goto out;
1453 }
1454
1455 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1456 false, lcp->lc_layout_type,
1457 &ls);
1458 if (nfserr) {
31ef83dc 1459 trace_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1460 /* fixup error code as per RFC5661 */
1461 if (nfserr == nfserr_bad_stateid)
1462 nfserr = nfserr_badlayout;
1463 goto out;
1464 }
1465
cc8a5532
JL		 1466 /* LAYOUTCOMMIT does not require any serialization */
1467 mutex_unlock(&ls->ls_mutex);
1468
9cf514cc
CH		 1469 if (new_size > i_size_read(inode)) {
1470 lcp->lc_size_chg = 1;
1471 lcp->lc_newsize = new_size;
1472 } else {
1473 lcp->lc_size_chg = 0;
1474 }
1475
d8398fc1 1476 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1477 nfs4_put_stid(&ls->ls_stid);
1478out:
1479 return nfserr;
1480}
1481
1482static __be32
1483nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 1484 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1485{
eb69853d 1486 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 1487 struct svc_fh *current_fh = &cstate->current_fh;
1488 __be32 nfserr;
1489
1490 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1491 if (nfserr)
1492 goto out;
1493
1494 nfserr = nfserr_layoutunavailable;
1495 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1496 goto out;
1497
1498 switch (lrp->lr_seg.iomode) {
1499 case IOMODE_READ:
1500 case IOMODE_RW:
1501 case IOMODE_ANY:
1502 break;
1503 default:
1504 dprintk("%s: invalid iomode %d\n", __func__,
1505 lrp->lr_seg.iomode);
1506 nfserr = nfserr_inval;
1507 goto out;
1508 }
1509
1510 switch (lrp->lr_return_type) {
1511 case RETURN_FILE:
1512 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1513 break;
1514 case RETURN_FSID:
1515 case RETURN_ALL:
1516 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1517 break;
1518 default:
1519 dprintk("%s: invalid return_type %d\n", __func__,
1520 lrp->lr_return_type);
1521 nfserr = nfserr_inval;
1522 break;
1523 }
1524out:
1525 return nfserr;
1526}
1527#endif /* CONFIG_NFSD_PNFS */
1528
1da177e4
LT		 1529/*
1530 * NULL call.
1531 */
7111c66e 1532static __be32
a6beb732 1533nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 1534{
1535 return nfs_ok;
1536}
1537
e2b20950
SA		 1538static inline void nfsd4_increment_op_stats(u32 opnum)
1539{
1540 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1541 nfsdstats.nfs4_opcount[opnum]++;
1542}
1543
f9bb94c4
AA		 1544enum nfsd4_op_flags {
1545 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
5ece3caf
MJ		 1546 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1547 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
68d93184
BF		 1548 /* For rfc 5661 section 2.6.3.1.1: */
1549 OP_HANDLES_WRONGSEC = 1 << 3,
1550 OP_IS_PUTFH_LIKE = 1 << 4,
1091006c 1551 /*
c856694e
BF		 1552 * These are the ops whose result size we estimate before
1553 * encoding, to avoid performing an op then not being able to
1554 * respond or cache a response. This includes writes and setattrs
1555 * as well as the operations usually called "nonidempotent":
1556 */
1557 OP_MODIFIES_SOMETHING = 1 << 5,
1558 /*
1559 * Cache compounds containing these ops in the xid-based drc:
1091006c
BF		 1560 * We use the DRC for compounds containing non-idempotent
1561 * operations, *except* those that are 4.1-specific (since
1562 * sessions provide their own EOS), and except for stateful
1563 * operations other than setclientid and setclientid_confirm
1564 * (since sequence numbers provide EOS for open, lock, etc in
1565 * the v4.0 case).
1566 */
c856694e 1567 OP_CACHEME = 1 << 6,
8b70484c
TM		 1568 /*
1569 * These are ops which clear current state id.
1570 */
1571 OP_CLEAR_STATEID = 1 << 7,
c856694e
BF		 1572};
1573
1574struct nfsd4_operation {
eb69853d
CH		 1575 __be32 (*op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1576 union nfsd4_op_u *);
c856694e
BF		 1577 u32 op_flags;
1578 char *op_name;
58e7b33a 1579 /* Try to get response size before operation */
1c122638 1580 u32 (*op_rsize_bop)(struct svc_rqst *, struct nfsd4_op *);
57832e7b
CH		 1581 void (*op_get_currentstateid)(struct nfsd4_compound_state *,
1582 union nfsd4_op_u *);
b60e9859
CH		 1583 void (*op_set_currentstateid)(struct nfsd4_compound_state *,
1584 union nfsd4_op_u *);
b591480b
BF		 1585};
1586
1587static struct nfsd4_operation nfsd4_ops[];
1588
f1c7f79b 1589static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1590
f9bb94c4 1591/*
57716355 1592 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1593 *
57716355
BF		 1594 * Also note, enforced elsewhere:
1595 * - SEQUENCE other than as first op results in
1596 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1597 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1598 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1599 * - DESTROY_SESSION must be the final operation in a compound, if
1600 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1601 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1602 */
57716355 1603static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1604{
57716355
BF		 1605 struct nfsd4_op *op = &args->ops[0];
1606
1607 /* These ordering requirements don't apply to NFSv4.0: */
1608 if (args->minorversion == 0)
1609 return nfs_ok;
1610 /* This is weird, but OK, not our problem: */
1611 if (args->opcnt == 0)
1612 return nfs_ok;
1613 if (op->status == nfserr_op_illegal)
1614 return nfs_ok;
1615 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1616 return nfserr_op_not_in_session;
1617 if (op->opnum == OP_SEQUENCE)
1618 return nfs_ok;
1619 if (args->opcnt != 1)
1620 return nfserr_not_only_op;
1621 return nfs_ok;
f9bb94c4
AA		 1622}
1623
22b03214
BF		 1624static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1625{
1626 return &nfsd4_ops[op->opnum];
1627}
1628
1091006c
BF		 1629bool nfsd4_cache_this_op(struct nfsd4_op *op)
1630{
e372ba60
BF		 1631 if (op->opnum == OP_ILLEGAL)
1632 return false;
c856694e 1633 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1634}
1635
68d93184
BF		 1636static bool need_wrongsec_check(struct svc_rqst *rqstp)
1637{
1638 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1639 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1640 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1641 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1642 struct nfsd4_operation *thisd;
1643 struct nfsd4_operation *nextd;
1644
1645 thisd = OPDESC(this);
1646 /*
1647 * Most ops check wronsec on our own; only the putfh-like ops
1648 * have special rules.
1649 */
1650 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1651 return false;
1652 /*
1653 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1654 * put-filehandle operation if we're not going to use the
1655 * result:
1656 */
1657 if (argp->opcnt == resp->opcnt)
1658 return false;
51904b08
BF		 1659 if (next->opnum == OP_ILLEGAL)
1660 return false;
68d93184
BF		 1661 nextd = OPDESC(next);
1662 /*
1663 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1664 * errors themselves as necessary; others should check for them
1665 * now:
1666 */
1667 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1668}
1669
2d124dfa
BF		 1670static void svcxdr_init_encode(struct svc_rqst *rqstp,
1671 struct nfsd4_compoundres *resp)
1672{
1673 struct xdr_stream *xdr = &resp->xdr;
1674 struct xdr_buf *buf = &rqstp->rq_res;
1675 struct kvec *head = buf->head;
1676
1677 xdr->buf = buf;
ddd1ea56 1678 xdr->iov = head;
2d124dfa 1679 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1680 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1681 /* Tail and page_len should be zero at this point: */
1682 buf->len = buf->head[0].iov_len;
2825a7f9 1683 xdr->scratch.iov_len = 0;
05638dc7 1684 xdr->page_ptr = buf->pages - 1;
2825a7f9 1685 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1686 - rqstp->rq_auth_slack;
2d124dfa
BF		 1687}
1688
1da177e4
LT		 1689/*
1690 * COMPOUND call.
1691 */
7111c66e 1692static __be32
a6beb732 1693nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 1694{
a6beb732
CH		 1695 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1696 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 1697 struct nfsd4_op *op;
b591480b 1698 struct nfsd4_operation *opdesc;
e354d571 1699 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1700 struct svc_fh *current_fh = &cstate->current_fh;
1701 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1702 __be32 status;
1da177e4 1703
2d124dfa 1704 svcxdr_init_encode(rqstp, resp);
4aea24b2 1705 resp->tagp = resp->xdr.p;
1da177e4 1706 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1707 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1708 resp->taglen = args->taglen;
1709 resp->tag = args->tag;
1da177e4 1710 resp->rqstp = rqstp;
4daeed25 1711 cstate->minorversion = args->minorversion;
4daeed25
KM		 1712 fh_init(current_fh, NFS4_FHSIZE);
1713 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1714 /*
1715 * Don't use the deferral mechanism for NFSv4; compounds make it
1716 * too hard to avoid non-idempotency problems.
1717 */
30660e04 1718 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1719
1720 /*
1721 * According to RFC3010, this takes precedence over all other errors.
1722 */
1723 status = nfserr_minor_vers_mismatch;
35f7a14f 1724 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4
LT		 1725 goto out;
1726
57716355
BF		 1727 status = nfs41_check_op_ordering(args);
1728 if (status) {
f9bb94c4 1729 op = &args->ops[0];
57716355 1730 op->status = status;
f9bb94c4
AA		 1731 goto encode_op;
1732 }
1733
1da177e4
LT		 1734 while (!status && resp->opcnt < args->opcnt) {
1735 op = &args->ops[resp->opcnt++];
1736
b001a1b6
BH		 1737 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1738 resp->opcnt, args->opcnt, op->opnum,
1739 nfsd4_op_name(op->opnum));
1da177e4
LT		 1740 /*
1741 * The XDR decode routines may have pre-set op->status;
1742 * for example, if there is a miscellaneous XDR error
1743 * it will be set to nfserr_bad_xdr.
1744 */
9d313b17
BF		 1745 if (op->status) {
1746 if (op->opnum == OP_OPEN)
1747 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1748 goto encode_op;
9d313b17 1749 }
1da177e4 1750
22b03214 1751 opdesc = OPDESC(op);
b591480b 1752
4daeed25 1753 if (!current_fh->fh_dentry) {
27d630ec 1754 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1755 op->status = nfserr_nofilehandle;
1756 goto encode_op;
1757 }
4daeed25 1758 } else if (current_fh->fh_export->ex_fslocs.migrated &&
eeac294e 1759 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1760 op->status = nfserr_moved;
1da177e4
LT		 1761 goto encode_op;
1762 }
b591480b 1763
2336745e
KM		 1764 fh_clear_wcc(current_fh);
1765
58e7b33a
MJ		 1766 /* If op is non-idempotent */
1767 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1768 /*
a8095f7e
BF		 1769 * Don't execute this op if we couldn't encode a
1770 * succesful reply:
1771 */
1772 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1773 /*
1774 * Plus if there's another operation, make sure
4c69d585
BF		 1775 * we'll have space to at least encode an error:
1776 */
1777 if (resp->opcnt < args->opcnt)
1778 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1779 op->status = nfsd4_check_resp_size(resp, plen);
1780 }
1781
1782 if (op->status)
1783 goto encode_op;
1784
b600de7a
BF		 1785 if (opdesc->op_get_currentstateid)
1786 opdesc->op_get_currentstateid(cstate, &op->u);
1787 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1788
8b70484c
TM		 1789 if (!op->status) {
1790 if (opdesc->op_set_currentstateid)
1791 opdesc->op_set_currentstateid(cstate, &op->u);
1792
1793 if (opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1794 clear_current_stateid(cstate);
8b70484c
TM		 1795
1796 if (need_wrongsec_check(rqstp))
4daeed25 1797 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1798 }
68d93184 1799
1da177e4 1800encode_op:
49557cc7 1801 /* Only from SEQUENCE */
4daeed25 1802 if (cstate->status == nfserr_replay_cache) {
da3846a2 1803 dprintk("%s NFS4.1 replay from cache\n", __func__);
abfabf8c 1804 status = op->status;
da3846a2
AA		 1805 goto out;
1806 }
a90b061c 1807 if (op->status == nfserr_replay_me) {
a4f1706a 1808 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1809 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1810 status = op->status = op->replay->rp_status;
1811 } else {
1812 nfsd4_encode_operation(resp, op);
1813 status = op->status;
1814 }
0407717d
BH		 1815
1816 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1817 args->ops, args->opcnt, resp->opcnt, op->opnum,
1818 be32_to_cpu(status));
1819
58fb12e6 1820 nfsd4_cstate_clear_replay(cstate);
e2b20950 1821 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1822 }
1823
4daeed25
KM		 1824 cstate->status = status;
1825 fh_put(current_fh);
1826 fh_put(save_fh);
1827 BUG_ON(cstate->replay_owner);
1da177e4 1828out:
2f425878 1829 /* Reset deferral mechanism for RPC deferrals */
30660e04 1830 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1831 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1832 return status;
1833}
1834
58e7b33a
MJ		 1835#define op_encode_hdr_size (2)
1836#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1837#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1838#define op_encode_change_info_maxsz (5)
1839#define nfs4_fattr_bitmap_maxsz (4)
1840
8c7424cf
BF		 1841/* We'll fall back on returning no lockowner if run out of space: */
1842#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1843#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1844
1845#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1846
1847#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1848#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1849 op_encode_ace_maxsz)
1850
1851#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1852
1853static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1854{
1855 return (op_encode_hdr_size) * sizeof(__be32);
1856}
1857
1858static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1859{
1860 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1861}
1862
2282cd2c
KM		 1863static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1864{
1865 /* ac_supported, ac_resp_access */
1866 return (op_encode_hdr_size + 2)* sizeof(__be32);
1867}
1868
58e7b33a
MJ		 1869static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1870{
1871 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1872}
1873
1874static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1875{
1876 return (op_encode_hdr_size + op_encode_change_info_maxsz
1877 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1878}
1879
b86cef60
BF		 1880/*
1881 * Note since this is an idempotent operation we won't insist on failing
1882 * the op prematurely if the estimate is too large. We may turn off splice
1883 * reads unnecessarily.
1884 */
1885static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1886 struct nfsd4_op *op)
1887{
1888 u32 *bmap = op->u.getattr.ga_bmval;
1889 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1890 u32 ret = 0;
1891
1892 if (bmap0 & FATTR4_WORD0_ACL)
1893 return svc_max_payload(rqstp);
1894 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1895 return svc_max_payload(rqstp);
1896
1897 if (bmap1 & FATTR4_WORD1_OWNER) {
1898 ret += IDMAP_NAMESZ + 4;
1899 bmap1 &= ~FATTR4_WORD1_OWNER;
1900 }
1901 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1902 ret += IDMAP_NAMESZ + 4;
1903 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1904 }
1905 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1906 ret += NFS4_FHSIZE + 4;
1907 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1908 }
1909 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 1910 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 1911 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1912 }
1913 /*
1914 * Largest of remaining attributes are 16 bytes (e.g.,
1915 * supported_attributes)
1916 */
1917 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1918 /* bitmask, length */
1919 ret += 20;
1920 return ret;
1921}
1922
2282cd2c
KM		 1923static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1924{
1925 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1926}
1927
58e7b33a
MJ		 1928static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1929{
1930 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1931 * sizeof(__be32);
1932}
1933
1934static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1935{
1936 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1937 * sizeof(__be32);
1938}
1939
1940static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1941{
1942 return (op_encode_hdr_size + op_encode_stateid_maxsz
1943 + op_encode_change_info_maxsz + 1
1944 + nfs4_fattr_bitmap_maxsz
1945 + op_encode_delegation_maxsz) * sizeof(__be32);
1946}
1947
1948static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1949{
1950 u32 maxcount = 0, rlen = 0;
1951
1952 maxcount = svc_max_payload(rqstp);
3c7aa15d 1953 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1954
622f560e 1955 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1956}
1957
1958static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1959{
3c7aa15d 1960 u32 maxcount = 0, rlen = 0;
58e7b33a 1961
3c7aa15d
KM		 1962 maxcount = svc_max_payload(rqstp);
1963 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1964
561f0ed4
BF		 1965 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1966 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1967}
1968
2282cd2c
KM		 1969static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1970{
1971 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1972}
1973
58e7b33a
MJ		 1974static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1975{
1976 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1977 * sizeof(__be32);
1978}
1979
1980static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1981{
1982 return (op_encode_hdr_size + op_encode_change_info_maxsz
1983 + op_encode_change_info_maxsz) * sizeof(__be32);
1984}
1985
ccae70a9
BF		 1986static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1987 struct nfsd4_op *op)
1988{
d1d84c96
BF		 1989 return (op_encode_hdr_size
1990 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1991}
1992
2282cd2c
KM		 1993static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1994{
1995 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1996 * sizeof(__be32);
1997}
1998
58e7b33a
MJ		 1999static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2000{
2001 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2002}
2003
2282cd2c
KM		 2004static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2005{
2006 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2007 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2008}
2009
58e7b33a
MJ		 2010static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2011{
480efaee
BF		 2012 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2013 sizeof(__be32);
58e7b33a
MJ		 2014}
2015
2016static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2017{
f34e432b 2018 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2019}
2020
2021static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2022{
2023 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2024 1 + 1 + /* eir_flags, spr_how */\
2025 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2026 2 + /*eir_server_owner.so_minor_id */\
2027 /* eir_server_owner.so_major_id<> */\
2028 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2029 /* eir_server_scope<> */\
2030 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2031 1 + /* eir_server_impl_id array length */\
2032 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2033}
2034
2035static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2036{
2037 return (op_encode_hdr_size + \
2038 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2039 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2040}
2041
2042static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2043{
2044 return (op_encode_hdr_size + \
2045 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2046 2 + /* csr_sequence, csr_flags */\
2047 op_encode_channel_attrs_maxsz + \
2048 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2049}
2050
29ae7f9d
AS		 2051static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2052{
2053 return (op_encode_hdr_size +
2054 1 /* wr_callback */ +
2055 op_encode_stateid_maxsz /* wr_callback */ +
2056 2 /* wr_count */ +
2057 1 /* wr_committed */ +
2058 op_encode_verifier_maxsz +
2059 1 /* cr_consecutive */ +
2060 1 /* cr_synchronous */) * sizeof(__be32);
2061}
2062
9cf514cc 2063#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2064static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2065{
2066 u32 maxcount = 0, rlen = 0;
2067
2068 maxcount = svc_max_payload(rqstp);
2069 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2070
2071 return (op_encode_hdr_size +
2072 1 /* gd_layout_type*/ +
2073 XDR_QUADLEN(rlen) +
2074 2 /* gd_notify_types */) * sizeof(__be32);
2075}
2076
9cf514cc
CH		 2077/*
2078 * At this stage we don't really know what layout driver will handle the request,
2079 * so we need to define an arbitrary upper bound here.
2080 */
2081#define MAX_LAYOUT_SIZE 128
2082static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2083{
2084 return (op_encode_hdr_size +
2085 1 /* logr_return_on_close */ +
2086 op_encode_stateid_maxsz +
2087 1 /* nr of layouts */ +
2088 MAX_LAYOUT_SIZE) * sizeof(__be32);
2089}
2090
2091static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2092{
2093 return (op_encode_hdr_size +
2094 1 /* locr_newsize */ +
2095 2 /* ns_size */) * sizeof(__be32);
2096}
2097
2098static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2099{
2100 return (op_encode_hdr_size +
2101 1 /* lrs_stateid */ +
2102 op_encode_stateid_maxsz) * sizeof(__be32);
2103}
2104#endif /* CONFIG_NFSD_PNFS */
2105
2282cd2c
KM		 2106
2107static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2108{
2109 return (op_encode_hdr_size + 3) * sizeof(__be32);
2110}
2111
20766016 2112static struct nfsd4_operation nfsd4_ops[] = {
b591480b 2113 [OP_ACCESS] = {
eb69853d 2114 .op_func = nfsd4_access,
b001a1b6 2115 .op_name = "OP_ACCESS",
1c122638 2116 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2117 },
2118 [OP_CLOSE] = {
eb69853d 2119 .op_func = nfsd4_close,
58e7b33a 2120 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2121 .op_name = "OP_CLOSE",
1c122638 2122 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2123 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2124 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2125 },
2126 [OP_COMMIT] = {
eb69853d 2127 .op_func = nfsd4_commit,
58e7b33a 2128 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2129 .op_name = "OP_COMMIT",
1c122638 2130 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2131 },
2132 [OP_CREATE] = {
eb69853d 2133 .op_func = nfsd4_create,
d1471053 2134 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2135 .op_name = "OP_CREATE",
1c122638 2136 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2137 },
2138 [OP_DELEGRETURN] = {
eb69853d 2139 .op_func = nfsd4_delegreturn,
58e7b33a 2140 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2141 .op_name = "OP_DELEGRETURN",
58e7b33a 2142 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2143 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2144 },
2145 [OP_GETATTR] = {
eb69853d 2146 .op_func = nfsd4_getattr,
eeac294e 2147 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2148 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2149 .op_name = "OP_GETATTR",
b591480b
BF		 2150 },
2151 [OP_GETFH] = {
eb69853d 2152 .op_func = nfsd4_getfh,
b001a1b6 2153 .op_name = "OP_GETFH",
1c122638 2154 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2155 },
2156 [OP_LINK] = {
eb69853d 2157 .op_func = nfsd4_link,
c856694e
BF		 2158 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2159 | OP_CACHEME,
b001a1b6 2160 .op_name = "OP_LINK",
1c122638 2161 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2162 },
2163 [OP_LOCK] = {
eb69853d 2164 .op_func = nfsd4_lock,
58e7b33a 2165 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2166 .op_name = "OP_LOCK",
1c122638 2167 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2168 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2169 },
2170 [OP_LOCKT] = {
eb69853d 2171 .op_func = nfsd4_lockt,
b001a1b6 2172 .op_name = "OP_LOCKT",
1c122638 2173 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2174 },
2175 [OP_LOCKU] = {
eb69853d 2176 .op_func = nfsd4_locku,
58e7b33a 2177 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2178 .op_name = "OP_LOCKU",
1c122638 2179 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2180 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2181 },
2182 [OP_LOOKUP] = {
eb69853d 2183 .op_func = nfsd4_lookup,
d1471053 2184 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2185 .op_name = "OP_LOOKUP",
1c122638 2186 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2187 },
2188 [OP_LOOKUPP] = {
eb69853d 2189 .op_func = nfsd4_lookupp,
d1471053 2190 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2191 .op_name = "OP_LOOKUPP",
1c122638 2192 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2193 },
2194 [OP_NVERIFY] = {
eb69853d 2195 .op_func = nfsd4_nverify,
b001a1b6 2196 .op_name = "OP_NVERIFY",
1c122638 2197 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2198 },
2199 [OP_OPEN] = {
eb69853d 2200 .op_func = nfsd4_open,
58e7b33a 2201 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2202 .op_name = "OP_OPEN",
1c122638 2203 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2204 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2205 },
2206 [OP_OPEN_CONFIRM] = {
eb69853d 2207 .op_func = nfsd4_open_confirm,
58e7b33a 2208 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2209 .op_name = "OP_OPEN_CONFIRM",
1c122638 2210 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2211 },
2212 [OP_OPEN_DOWNGRADE] = {
eb69853d 2213 .op_func = nfsd4_open_downgrade,
58e7b33a 2214 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2215 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2216 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2217 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2218 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2219 },
2220 [OP_PUTFH] = {
eb69853d 2221 .op_func = nfsd4_putfh,
68d93184 2222 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2223 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2224 .op_name = "OP_PUTFH",
1c122638 2225 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2226 },
eeac294e 2227 [OP_PUTPUBFH] = {
eb69853d 2228 .op_func = nfsd4_putrootfh,
68d93184 2229 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2230 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2231 .op_name = "OP_PUTPUBFH",
1c122638 2232 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2233 },
b591480b 2234 [OP_PUTROOTFH] = {
eb69853d 2235 .op_func = nfsd4_putrootfh,
68d93184 2236 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2237 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2238 .op_name = "OP_PUTROOTFH",
1c122638 2239 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2240 },
2241 [OP_READ] = {
eb69853d 2242 .op_func = nfsd4_read,
b001a1b6 2243 .op_name = "OP_READ",
1c122638 2244 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2245 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2246 },
2247 [OP_READDIR] = {
eb69853d 2248 .op_func = nfsd4_readdir,
b001a1b6 2249 .op_name = "OP_READDIR",
1c122638 2250 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2251 },
2252 [OP_READLINK] = {
eb69853d 2253 .op_func = nfsd4_readlink,
b001a1b6 2254 .op_name = "OP_READLINK",
1c122638 2255 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2256 },
2257 [OP_REMOVE] = {
eb69853d 2258 .op_func = nfsd4_remove,
c856694e 2259 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2260 .op_name = "OP_REMOVE",
1c122638 2261 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2262 },
2263 [OP_RENAME] = {
eb69853d 2264 .op_func = nfsd4_rename,
c856694e 2265 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2266 .op_name = "OP_RENAME",
1c122638 2267 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2268 },
2269 [OP_RENEW] = {
eb69853d 2270 .op_func = nfsd4_renew,
58e7b33a
MJ		 2271 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2272 | OP_MODIFIES_SOMETHING,
b001a1b6 2273 .op_name = "OP_RENEW",
1c122638 2274 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2275
b591480b
BF		 2276 },
2277 [OP_RESTOREFH] = {
eb69853d 2278 .op_func = nfsd4_restorefh,
68d93184 2279 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2280 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2281 .op_name = "OP_RESTOREFH",
1c122638 2282 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2283 },
2284 [OP_SAVEFH] = {
eb69853d 2285 .op_func = nfsd4_savefh,
58e7b33a 2286 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2287 .op_name = "OP_SAVEFH",
1c122638 2288 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2289 },
dcb488a3 2290 [OP_SECINFO] = {
eb69853d 2291 .op_func = nfsd4_secinfo,
68d93184 2292 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2293 .op_name = "OP_SECINFO",
1c122638 2294 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2295 },
b591480b 2296 [OP_SETATTR] = {
eb69853d 2297 .op_func = nfsd4_setattr,
b001a1b6 2298 .op_name = "OP_SETATTR",
c856694e 2299 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
1c122638 2300 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 2301 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 2302 },
2303 [OP_SETCLIENTID] = {
eb69853d 2304 .op_func = nfsd4_setclientid,
58e7b33a 2305 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2306 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2307 .op_name = "OP_SETCLIENTID",
1c122638 2308 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 2309 },
2310 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 2311 .op_func = nfsd4_setclientid_confirm,
58e7b33a 2312 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2313 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2314 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 2315 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2316 },
2317 [OP_VERIFY] = {
eb69853d 2318 .op_func = nfsd4_verify,
b001a1b6 2319 .op_name = "OP_VERIFY",
1c122638 2320 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2321 },
2322 [OP_WRITE] = {
eb69853d 2323 .op_func = nfsd4_write,
c856694e 2324 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2325 .op_name = "OP_WRITE",
1c122638 2326 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 2327 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 2328 },
2329 [OP_RELEASE_LOCKOWNER] = {
eb69853d 2330 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 2331 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2332 | OP_MODIFIES_SOMETHING,
b001a1b6 2333 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 2334 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2335 },
069b6ad4
AA		 2336
2337 /* NFSv4.1 operations */
2338 [OP_EXCHANGE_ID] = {
eb69853d 2339 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 2340 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2341 | OP_MODIFIES_SOMETHING,
069b6ad4 2342 .op_name = "OP_EXCHANGE_ID",
1c122638 2343 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 2344 },
cb73a9f4 2345 [OP_BACKCHANNEL_CTL] = {
eb69853d 2346 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 2347 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2348 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 2349 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 2350 },
1d1bc8f2 2351 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 2352 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2353 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2354 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2355 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 2356 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2357 },
069b6ad4 2358 [OP_CREATE_SESSION] = {
eb69853d 2359 .op_func = nfsd4_create_session,
58e7b33a
MJ		 2360 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2361 | OP_MODIFIES_SOMETHING,
069b6ad4 2362 .op_name = "OP_CREATE_SESSION",
1c122638 2363 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 2364 },
2365 [OP_DESTROY_SESSION] = {
eb69853d 2366 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 2367 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2368 | OP_MODIFIES_SOMETHING,
069b6ad4 2369 .op_name = "OP_DESTROY_SESSION",
1c122638 2370 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 2371 },
2372 [OP_SEQUENCE] = {
eb69853d 2373 .op_func = nfsd4_sequence,
f9bb94c4 2374 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2375 .op_name = "OP_SEQUENCE",
1c122638 2376 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 2377 },
094b5d74 2378 [OP_DESTROY_CLIENTID] = {
eb69853d 2379 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 2380 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2381 | OP_MODIFIES_SOMETHING,
094b5d74 2382 .op_name = "OP_DESTROY_CLIENTID",
1c122638 2383 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 2384 },
4dc6ec00 2385 [OP_RECLAIM_COMPLETE] = {
eb69853d 2386 .op_func = nfsd4_reclaim_complete,
58e7b33a 2387 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2388 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 2389 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 2390 },
04f4ad16 2391 [OP_SECINFO_NO_NAME] = {
eb69853d 2392 .op_func = nfsd4_secinfo_no_name,
68d93184 2393 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2394 .op_name = "OP_SECINFO_NO_NAME",
1c122638 2395 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 2396 },
17456804 2397 [OP_TEST_STATEID] = {
eb69853d 2398 .op_func = nfsd4_test_stateid,
17456804
BS		 2399 .op_flags = ALLOWED_WITHOUT_FH,
2400 .op_name = "OP_TEST_STATEID",
1c122638 2401 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 2402 },
e1ca12df 2403 [OP_FREE_STATEID] = {
eb69853d 2404 .op_func = nfsd4_free_stateid,
58e7b33a 2405 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2406 .op_name = "OP_FREE_STATEID",
57832e7b 2407 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 2408 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 2409 },
9cf514cc
CH		 2410#ifdef CONFIG_NFSD_PNFS
2411 [OP_GETDEVICEINFO] = {
eb69853d 2412 .op_func = nfsd4_getdeviceinfo,
9cf514cc
CH		 2413 .op_flags = ALLOWED_WITHOUT_FH,
2414 .op_name = "OP_GETDEVICEINFO",
1c122638 2415 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 2416 },
2417 [OP_LAYOUTGET] = {
eb69853d 2418 .op_func = nfsd4_layoutget,
9cf514cc
CH		 2419 .op_flags = OP_MODIFIES_SOMETHING,
2420 .op_name = "OP_LAYOUTGET",
1c122638 2421 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 2422 },
2423 [OP_LAYOUTCOMMIT] = {
eb69853d 2424 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 2425 .op_flags = OP_MODIFIES_SOMETHING,
2426 .op_name = "OP_LAYOUTCOMMIT",
1c122638 2427 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 2428 },
2429 [OP_LAYOUTRETURN] = {
eb69853d 2430 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 2431 .op_flags = OP_MODIFIES_SOMETHING,
2432 .op_name = "OP_LAYOUTRETURN",
1c122638 2433 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 2434 },
2435#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2436
2437 /* NFSv4.2 operations */
95d871f0 2438 [OP_ALLOCATE] = {
eb69853d 2439 .op_func = nfsd4_allocate,
95d871f0
AS		 2440 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2441 .op_name = "OP_ALLOCATE",
1c122638 2442 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 2443 },
b0cb9085 2444 [OP_DEALLOCATE] = {
eb69853d 2445 .op_func = nfsd4_deallocate,
b0cb9085
AS		 2446 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2447 .op_name = "OP_DEALLOCATE",
1c122638 2448 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 2449 },
ffa0160a 2450 [OP_CLONE] = {
eb69853d 2451 .op_func = nfsd4_clone,
ffa0160a
CH		 2452 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2453 .op_name = "OP_CLONE",
1c122638 2454 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 2455 },
29ae7f9d 2456 [OP_COPY] = {
eb69853d 2457 .op_func = nfsd4_copy,
29ae7f9d
AS		 2458 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2459 .op_name = "OP_COPY",
1c122638 2460 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 2461 },
24bab491 2462 [OP_SEEK] = {
eb69853d 2463 .op_func = nfsd4_seek,
24bab491 2464 .op_name = "OP_SEEK",
1c122638 2465 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 2466 },
b591480b
BF		 2467};
2468
ed941643
AE		 2469/**
2470 * nfsd4_spo_must_allow - Determine if the compound op contains an
2471 * operation that is allowed to be sent with machine credentials
2472 *
2473 * @rqstp: a pointer to the struct svc_rqst
2474 *
2475 * Checks to see if the compound contains a spo_must_allow op
2476 * and confirms that it was sent with the proper machine creds.
2477 */
2478
2479bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2480{
2481 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2482 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2483 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2484 struct nfsd4_compound_state *cstate = &resp->cstate;
2485 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2486 u32 opiter;
2487
2488 if (!cstate->minorversion)
2489 return false;
2490
2491 if (cstate->spo_must_allowed == true)
2492 return true;
2493
2494 opiter = resp->opcnt;
2495 while (opiter < argp->opcnt) {
2496 this = &argp->ops[opiter++];
2497 if (test_bit(this->opnum, allow->u.longs) &&
2498 cstate->clp->cl_mach_cred &&
2499 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2500 cstate->spo_must_allowed = true;
2501 return true;
2502 }
2503 }
2504 cstate->spo_must_allowed = false;
2505 return false;
2506}
2507
4f0cefbf
BF		 2508int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2509{
05b7278d 2510 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 2511 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 2512
2513 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2514 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 2515}
2516
07d1f802
BF		 2517void warn_on_nonidempotent_op(struct nfsd4_op *op)
2518{
2519 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2520 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2521 op->opnum, nfsd4_op_name(op->opnum));
2522 WARN_ON_ONCE(1);
2523 }
2524}
2525
f1c7f79b 2526static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2527{
2528 if (opnum < ARRAY_SIZE(nfsd4_ops))
2529 return nfsd4_ops[opnum].op_name;
2530 return "unknown_operation";
2531}
2532
1da177e4 2533#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2534struct nfsd4_voidargs { int dummy; };
2535
1da177e4 2536static struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 2537 [NFSPROC4_NULL] = {
f7235b6b 2538 .pc_func = nfsd4_proc_null,
63f8de37 2539 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 2540 .pc_argsize = sizeof(struct nfsd4_voidargs),
2541 .pc_ressize = sizeof(struct nfsd4_voidres),
2542 .pc_cachetype = RC_NOCACHE,
2543 .pc_xdrressize = 1,
2544 },
2545 [NFSPROC4_COMPOUND] = {
f7235b6b 2546 .pc_func = nfsd4_proc_compound,
026fec7e 2547 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 2548 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 2549 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2550 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2551 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2552 .pc_cachetype = RC_NOCACHE,
2553 .pc_xdrressize = NFSD_BUFSIZE/4,
2554 },
1da177e4
LT		 2555};
2556
2557struct svc_version nfsd_version4 = {
5283b03e
JL		 2558 .vs_vers = 4,
2559 .vs_nproc = 2,
2560 .vs_proc = nfsd_procedures4,
2561 .vs_dispatch = nfsd_dispatch,
2562 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2563 .vs_rpcb_optnl = true,
2564 .vs_need_cong_ctrl = true,
1da177e4
LT		 2565};
2566
2567/*
2568 * Local variables:
2569 * c-basic-offset: 8
2570 * End:
2571 */
Michael's Linux tree.