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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 */
880a3a53 35#include <linux/fs_struct.h>
7e06b7f9 36#include <linux/file.h>
b0cb9085 37#include <linux/falloc.h>
5a0e3ad6 38#include <linux/slab.h>
1da177e4 39
58e7b33a 40#include "idmap.h"
9a74af21
BH		 41#include "cache.h"
42#include "xdr4.h"
0a3adade 43#include "vfs.h"
8b70484c 44#include "current_stateid.h"
3320fef1 45#include "netns.h"
4ac7249e 46#include "acl.h"
9cf514cc 47#include "pnfs.h"
31ef83dc 48#include "trace.h"
1da177e4 49
18032ca0
DQ		 50#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
51#include <linux/security.h>
52
53static inline void
54nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
55{
2b0143b5 56 struct inode *inode = d_inode(resfh->fh_dentry);
18032ca0
DQ		 57 int status;
58
5955102c 59 inode_lock(inode);
18032ca0
DQ		 60 status = security_inode_setsecctx(resfh->fh_dentry,
61 label->data, label->len);
5955102c 62 inode_unlock(inode);
18032ca0
DQ		 63
64 if (status)
65 /*
66 * XXX: We should really fail the whole open, but we may
67 * already have created a new file, so it may be too
68 * late. For now this seems the least of evils:
69 */
70 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
71
72 return;
73}
74#else
75static inline void
76nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
77{ }
78#endif
79
1da177e4
LT		 80#define NFSDDBG_FACILITY NFSDDBG_PROC
81
3c8e0316
YZ		 82static u32 nfsd_attrmask[] = {
83 NFSD_WRITEABLE_ATTRS_WORD0,
84 NFSD_WRITEABLE_ATTRS_WORD1,
85 NFSD_WRITEABLE_ATTRS_WORD2
86};
87
88static u32 nfsd41_ex_attrmask[] = {
89 NFSD_SUPPATTR_EXCLCREAT_WORD0,
90 NFSD_SUPPATTR_EXCLCREAT_WORD1,
91 NFSD_SUPPATTR_EXCLCREAT_WORD2
92};
93
94static __be32
95check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
96 u32 *bmval, u32 *writable)
97{
98 struct dentry *dentry = cstate->current_fh.fh_dentry;
32ddd944 99 struct svc_export *exp = cstate->current_fh.fh_export;
3c8e0316 100
916d2d84 101 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
3c8e0316 102 return nfserr_attrnotsupp;
916d2d84
BF		 103 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
104 return nfserr_attrnotsupp;
32ddd944
BF		 105 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
106 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
107 return nfserr_attrnotsupp;
916d2d84
BF		 108 if (writable && !bmval_is_subset(bmval, writable))
109 return nfserr_inval;
47057abd
AG		 110 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
111 (bmval[1] & FATTR4_WORD1_MODE))
112 return nfserr_inval;
3c8e0316
YZ		 113 return nfs_ok;
114}
115
116static __be32
117nfsd4_check_open_attributes(struct svc_rqst *rqstp,
118 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
119{
120 __be32 status = nfs_ok;
121
122 if (open->op_create == NFS4_OPEN_CREATE) {
123 if (open->op_createmode == NFS4_CREATE_UNCHECKED
124 || open->op_createmode == NFS4_CREATE_GUARDED)
125 status = check_attr_support(rqstp, cstate,
126 open->op_bmval, nfsd_attrmask);
127 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
128 status = check_attr_support(rqstp, cstate,
129 open->op_bmval, nfsd41_ex_attrmask);
130 }
131
132 return status;
133}
134
9208faf2
YZ		 135static int
136is_create_with_attrs(struct nfsd4_open *open)
137{
138 return open->op_create == NFS4_OPEN_CREATE
139 && (open->op_createmode == NFS4_CREATE_UNCHECKED
140 || open->op_createmode == NFS4_CREATE_GUARDED
141 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
142}
143
144/*
145 * if error occurs when setting the acl, just clear the acl bit
146 * in the returned attr bitmap.
147 */
148static void
149do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
150 struct nfs4_acl *acl, u32 *bmval)
151{
152 __be32 status;
153
154 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
155 if (status)
156 /*
157 * We should probably fail the whole open at this point,
158 * but we've already created the file, so it's too late;
159 * So this seems the least of evils:
160 */
161 bmval[0] &= ~FATTR4_WORD0_ACL;
162}
163
1da177e4
LT		 164static inline void
165fh_dup2(struct svc_fh *dst, struct svc_fh *src)
166{
167 fh_put(dst);
168 dget(src->fh_dentry);
169 if (src->fh_export)
bf18f163 170 exp_get(src->fh_export);
1da177e4
LT		 171 *dst = *src;
172}
173
b37ad28b 174static __be32
dc730e17 175do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
1da177e4 176{
b37ad28b 177 __be32 status;
1da177e4
LT		 178
179 if (open->op_truncate &&
180 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
181 return nfserr_inval;
182
a043226b
BF		 183 accmode |= NFSD_MAY_READ_IF_EXEC;
184
1da177e4 185 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
8837abca 186 accmode |= NFSD_MAY_READ;
9801d8a3 187 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
8837abca 188 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
57ecb34f 189 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
8837abca 190 accmode |= NFSD_MAY_WRITE;
1da177e4
LT		 191
192 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
193
194 return status;
195}
196
aadab6c6
BF		 197static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
198{
2b0143b5 199 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
aadab6c6
BF		 200
201 if (S_ISREG(mode))
202 return nfs_ok;
203 if (S_ISDIR(mode))
204 return nfserr_isdir;
205 /*
206 * Using err_symlink as our catch-all case may look odd; but
207 * there's no other obvious error for this case in 4.0, and we
208 * happen to know that it will cause the linux v4 client to do
209 * the right thing on attempts to open something other than a
210 * regular file.
211 */
212 return nfserr_symlink;
213}
214
bbc9c36c
BF		 215static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
216{
217 if (nfsd4_has_session(cstate))
218 return;
219 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
220 &resfh->fh_handle);
221}
222
b37ad28b 223static __be32
c0e6bee4 224do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
1da177e4 225{
bbc9c36c 226 struct svc_fh *current_fh = &cstate->current_fh;
7007c90f 227 int accmode;
b37ad28b 228 __be32 status;
1da177e4 229
c0e6bee4
BF		 230 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
231 if (!*resfh)
59deeb9e 232 return nfserr_jukebox;
c0e6bee4 233 fh_init(*resfh, NFS4_FHSIZE);
1da177e4
LT		 234 open->op_truncate = 0;
235
236 if (open->op_create) {
79fb54ab
BH		 237 /* FIXME: check session persistence and pnfs flags.
238 * The nfsv4.1 spec requires the following semantics:
239 *
240 * Persistent | pNFS | Server REQUIRED | Client Allowed
241 * Reply Cache | server | |
242 * -------------+--------+-----------------+--------------------
243 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
244 * | | | (SHOULD)
245 * | | and EXCLUSIVE4 | or EXCLUSIVE4
246 * | | | (SHOULD NOT)
247 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
248 * yes | no | GUARDED4 | GUARDED4
249 * yes | yes | GUARDED4 | GUARDED4
250 */
251
1da177e4
LT		 252 /*
253 * Note: create modes (UNCHECKED,GUARDED...) are the same
ac6721a1 254 * in NFSv4 as in v3 except EXCLUSIVE4_1.
1da177e4 255 */
880a3a53 256 current->fs->umask = open->op_umask;
ac6721a1 257 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
1da177e4 258 open->op_fname.len, &open->op_iattr,
c0e6bee4 259 *resfh, open->op_createmode,
749997e5 260 (u32 *)open->op_verf.data,
856121b2 261 &open->op_truncate, &open->op_created);
880a3a53 262 current->fs->umask = 0;
749997e5 263
18032ca0 264 if (!status && open->op_label.len)
c0e6bee4 265 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
18032ca0 266
99f88726 267 /*
ead8fb8c
KM		 268 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
269 * use the returned bitmask to indicate which attributes
270 * we used to store the verifier:
749997e5 271 */
ead8fb8c
KM		 272 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
273 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
274 FATTR4_WORD1_TIME_MODIFY);
4335723e
BF		 275 } else
276 /*
277 * Note this may exit with the parent still locked.
278 * We will hold the lock until nfsd4_open's final
279 * lookup, to prevent renames or unlinks until we've had
280 * a chance to an acquire a delegation if appropriate.
281 */
1da177e4 282 status = nfsd_lookup(rqstp, current_fh,
c0e6bee4 283 open->op_fname.data, open->op_fname.len, *resfh);
9dc4e6c4
BF		 284 if (status)
285 goto out;
c0e6bee4 286 status = nfsd_check_obj_isreg(*resfh);
af85852d
BF		 287 if (status)
288 goto out;
1da177e4 289
9208faf2 290 if (is_create_with_attrs(open) && open->op_acl != NULL)
c0e6bee4 291 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
9208faf2 292
c0e6bee4 293 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
7007c90f 294 accmode = NFSD_MAY_NOP;
89f6c336
BF		 295 if (open->op_created ||
296 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
7007c90f 297 accmode |= NFSD_MAY_OWNER_OVERRIDE;
c0e6bee4 298 status = do_open_permission(rqstp, *resfh, open, accmode);
41fd1e42 299 set_change_info(&open->op_cinfo, current_fh);
af85852d 300out:
1da177e4
LT		 301 return status;
302}
303
b37ad28b 304static __be32
bbc9c36c 305do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
1da177e4 306{
bbc9c36c 307 struct svc_fh *current_fh = &cstate->current_fh;
b37ad28b 308 __be32 status;
9f415eb2 309 int accmode = 0;
1da177e4 310
1da177e4
LT		 311 /* We don't know the target directory, and therefore can not
312 * set the change info
313 */
314
315 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
316
bbc9c36c 317 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
1da177e4
LT		 318
319 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
320 (open->op_iattr.ia_size == 0);
9f415eb2
BF		 321 /*
322 * In the delegation case, the client is telling us about an
323 * open that it *already* performed locally, some time ago. We
324 * should let it succeed now if possible.
325 *
326 * In the case of a CLAIM_FH open, on the other hand, the client
327 * may be counting on us to enforce permissions (the Linux 4.1
328 * client uses this for normal opens, for example).
329 */
330 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
331 accmode = NFSD_MAY_OWNER_OVERRIDE;
1da177e4 332
9f415eb2 333 status = do_open_permission(rqstp, current_fh, open, accmode);
1da177e4
LT		 334
335 return status;
336}
337
60adfc50
AA		 338static void
339copy_clientid(clientid_t *clid, struct nfsd4_session *session)
340{
341 struct nfsd4_sessionid *sid =
342 (struct nfsd4_sessionid *)session->se_sessionid.data;
343
344 clid->cl_boot = sid->clientid.cl_boot;
345 clid->cl_id = sid->clientid.cl_id;
346}
1da177e4 347
7191155b 348static __be32
ca364317 349nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 350 union nfsd4_op_u *u)
1da177e4 351{
eb69853d 352 struct nfsd4_open *open = &u->open;
b37ad28b 353 __be32 status;
c0e6bee4 354 struct svc_fh *resfh = NULL;
3320fef1
SK		 355 struct net *net = SVC_NET(rqstp);
356 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
03f318ca 357 bool reclaim = false;
6668958f 358
fe0750e5 359 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 360 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 361 open->op_openowner);
1da177e4 362
1da177e4
LT		 363 /* This check required by spec. */
364 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
365 return nfserr_inval;
366
856121b2 367 open->op_created = 0;
ab1350b2
MJ		 368 /*
369 * RFC5661 18.51.3
370 * Before RECLAIM_COMPLETE done, server should deny new lock
371 */
372 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 373 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
374 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 375 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
376 return nfserr_grace;
377
60adfc50
AA		 378 if (nfsd4_has_session(cstate))
379 copy_clientid(&open->op_clientid, cstate->session);
380
1da177e4 381 /* check seqid for replay. set nfs4_owner */
6cd22668 382 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 383 if (status == nfserr_replay_me) {
fe0750e5 384 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 385 fh_put(&cstate->current_fh);
a4773c08
BF		 386 fh_copy_shallow(&cstate->current_fh.fh_handle,
387 &rp->rp_openfh);
8837abca 388 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 389 if (status)
390 dprintk("nfsd4_open: replay failed"
391 " restoring previous filehandle\n");
392 else
a90b061c 393 status = nfserr_replay_me;
1da177e4
LT		 394 }
395 if (status)
396 goto out;
9d313b17
BF		 397 if (open->op_xdr_error) {
398 status = open->op_xdr_error;
399 goto out;
400 }
fb553c0f 401
3c8e0316
YZ		 402 status = nfsd4_check_open_attributes(rqstp, cstate, open);
403 if (status)
404 goto out;
405
fb553c0f
BF		 406 /* Openowner is now set, so sequence id will get bumped. Now we need
407 * these checks before we do any creates: */
cbd0d51a 408 status = nfserr_grace;
c87fb4a3 409 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 410 goto out;
411 status = nfserr_no_grace;
c87fb4a3 412 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 413 goto out;
fb553c0f 414
1da177e4 415 switch (open->op_claim_type) {
0dd3c192 416 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 417 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 418 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 419 if (status)
420 goto out;
421 break;
422 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 423 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 424 cstate, nn);
0cf99b91
MJ		 425 if (status)
426 goto out;
ba5378b6 427 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
03f318ca 428 reclaim = true;
8b289b2c
BF		 429 case NFS4_OPEN_CLAIM_FH:
430 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 431 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 432 if (status)
433 goto out;
c0e6bee4 434 resfh = &cstate->current_fh;
1da177e4 435 break;
8b289b2c 436 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 437 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 438 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 439 open->op_claim_type);
440 status = nfserr_notsupp;
441 goto out;
442 default:
2fdada03 443 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 444 open->op_claim_type);
445 status = nfserr_inval;
446 goto out;
447 }
448 /*
449 * nfsd4_process_open2() does the actual opening of the file. If
450 * successful, it (1) truncates the file if open->op_truncate was
451 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
452 */
c0e6bee4 453 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 454 WARN(status && open->op_created,
455 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
456 be32_to_cpu(status));
03f318ca
BF		 457 if (reclaim && !status)
458 nn->somebody_reclaimed = true;
1da177e4 459out:
c0e6bee4
BF		 460 if (resfh && resfh != &cstate->current_fh) {
461 fh_dup2(&cstate->current_fh, resfh);
462 fh_put(resfh);
463 kfree(resfh);
464 }
42297899 465 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 466 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 467 return status;
468}
469
9d313b17
BF		 470/*
471 * OPEN is the only seqid-mutating operation whose decoding can fail
472 * with a seqid-mutating error (specifically, decoding of user names in
473 * the attributes). Therefore we have to do some processing to look up
474 * the stateowner so that we can bump the seqid.
475 */
476static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
477{
eb69853d 478 struct nfsd4_open *open = &op->u.open;
9d313b17
BF		 479
480 if (!seqid_mutating_err(ntohl(op->status)))
481 return op->status;
482 if (nfsd4_has_session(cstate))
483 return op->status;
484 open->op_xdr_error = op->status;
eb69853d 485 return nfsd4_open(rqstp, cstate, &op->u);
9d313b17
BF		 486}
487
1da177e4
LT		 488/*
489 * filehandle-manipulating ops.
490 */
7191155b 491static __be32
b591480b 492nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 493 union nfsd4_op_u *u)
1da177e4 494{
eb69853d 495 u->getfh = &cstate->current_fh;
1da177e4
LT		 496 return nfs_ok;
497}
498
7191155b 499static __be32
ca364317 500nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 501 union nfsd4_op_u *u)
1da177e4 502{
eb69853d
CH		 503 struct nfsd4_putfh *putfh = &u->putfh;
504
ca364317
BF		 505 fh_put(&cstate->current_fh);
506 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
507 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
508 putfh->pf_fhlen);
68d93184 509 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
1da177e4
LT		 510}
511
7191155b 512static __be32
b591480b 513nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 514 union nfsd4_op_u *u)
1da177e4 515{
b37ad28b 516 __be32 status;
1da177e4 517
ca364317 518 fh_put(&cstate->current_fh);
df547efb 519 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 520 return status;
521}
522
7191155b 523static __be32
b591480b 524nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 525 union nfsd4_op_u *u)
1da177e4 526{
ca364317 527 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 528 return nfserr_restorefh;
529
ca364317 530 fh_dup2(&cstate->current_fh, &cstate->save_fh);
37c593c5
TM		 531 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
532 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
533 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
534 }
1da177e4
LT		 535 return nfs_ok;
536}
537
7191155b 538static __be32
b591480b 539nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 540 union nfsd4_op_u *u)
1da177e4 541{
ca364317 542 fh_dup2(&cstate->save_fh, &cstate->current_fh);
37c593c5
TM		 543 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
544 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
545 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
546 }
1da177e4
LT		 547 return nfs_ok;
548}
549
550/*
551 * misc nfsv4 ops
552 */
7191155b 553static __be32
ca364317 554nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 555 union nfsd4_op_u *u)
1da177e4 556{
eb69853d
CH		 557 struct nfsd4_access *access = &u->access;
558
1da177e4
LT		 559 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
560 return nfserr_inval;
561
562 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 563 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
564 &access->ac_supported);
1da177e4
LT		 565}
566
b9c0ef85 567static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1
CL		 568{
569 __be32 verf[2];
b9c0ef85 570 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
ab4684d1 571
f419992c
JL		 572 /*
573 * This is opaque to client, so no need to byte-swap. Use
256a89fa
AB		 574 * __force to keep sparse happy. y2038 time_t overflow is
575 * irrelevant in this usage.
f419992c
JL		 576 */
577 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
256a89fa 578 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec;
ab4684d1
CL		 579 memcpy(verifier->data, verf, sizeof(verifier->data));
580}
581
7191155b 582static __be32
ca364317 583nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 584 union nfsd4_op_u *u)
1da177e4 585{
eb69853d
CH		 586 struct nfsd4_commit *commit = &u->commit;
587
b9c0ef85 588 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
75c096f7 589 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
ca364317 590 commit->co_count);
1da177e4
LT		 591}
592
b37ad28b 593static __be32
ca364317 594nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 595 union nfsd4_op_u *u)
1da177e4 596{
eb69853d 597 struct nfsd4_create *create = &u->create;
1da177e4 598 struct svc_fh resfh;
b37ad28b 599 __be32 status;
1da177e4
LT		 600 dev_t rdev;
601
602 fh_init(&resfh, NFS4_FHSIZE);
603
fa08139d 604 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 605 if (status)
606 return status;
607
3c8e0316
YZ		 608 status = check_attr_support(rqstp, cstate, create->cr_bmval,
609 nfsd_attrmask);
610 if (status)
611 return status;
612
880a3a53 613 current->fs->umask = create->cr_umask;
1da177e4
LT		 614 switch (create->cr_type) {
615 case NF4LNK:
ca364317
BF		 616 status = nfsd_symlink(rqstp, &cstate->current_fh,
617 create->cr_name, create->cr_namelen,
1e444f5b 618 create->cr_data, &resfh);
1da177e4
LT		 619 break;
620
621 case NF4BLK:
880a3a53 622 status = nfserr_inval;
1da177e4
LT		 623 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
624 if (MAJOR(rdev) != create->cr_specdata1 ||
625 MINOR(rdev) != create->cr_specdata2)
880a3a53 626 goto out_umask;
ca364317
BF		 627 status = nfsd_create(rqstp, &cstate->current_fh,
628 create->cr_name, create->cr_namelen,
629 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 630 break;
631
632 case NF4CHR:
880a3a53 633 status = nfserr_inval;
1da177e4
LT		 634 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
635 if (MAJOR(rdev) != create->cr_specdata1 ||
636 MINOR(rdev) != create->cr_specdata2)
880a3a53 637 goto out_umask;
ca364317
BF		 638 status = nfsd_create(rqstp, &cstate->current_fh,
639 create->cr_name, create->cr_namelen,
640 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 641 break;
642
643 case NF4SOCK:
ca364317
BF		 644 status = nfsd_create(rqstp, &cstate->current_fh,
645 create->cr_name, create->cr_namelen,
646 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 647 break;
648
649 case NF4FIFO:
ca364317
BF		 650 status = nfsd_create(rqstp, &cstate->current_fh,
651 create->cr_name, create->cr_namelen,
652 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 653 break;
654
655 case NF4DIR:
656 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 657 status = nfsd_create(rqstp, &cstate->current_fh,
658 create->cr_name, create->cr_namelen,
659 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 660 break;
661
662 default:
663 status = nfserr_badtype;
664 }
665
9208faf2
YZ		 666 if (status)
667 goto out;
1da177e4 668
18032ca0
DQ		 669 if (create->cr_label.len)
670 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
671
9208faf2
YZ		 672 if (create->cr_acl != NULL)
673 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
674 create->cr_bmval);
675
676 fh_unlock(&cstate->current_fh);
677 set_change_info(&create->cr_cinfo, &cstate->current_fh);
678 fh_dup2(&cstate->current_fh, &resfh);
679out:
1da177e4 680 fh_put(&resfh);
880a3a53
BF		 681out_umask:
682 current->fs->umask = 0;
1da177e4
LT		 683 return status;
684}
685
7191155b 686static __be32
ca364317 687nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 688 union nfsd4_op_u *u)
1da177e4 689{
eb69853d 690 struct nfsd4_getattr *getattr = &u->getattr;
b37ad28b 691 __be32 status;
1da177e4 692
8837abca 693 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 694 if (status)
695 return status;
696
697 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
698 return nfserr_inval;
699
916d2d84
BF		 700 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
701 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
702 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 703
ca364317 704 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 705 return nfs_ok;
706}
707
7191155b 708static __be32
ca364317 709nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 710 union nfsd4_op_u *u)
1da177e4 711{
eb69853d 712 struct nfsd4_link *link = &u->link;
95424460 713 __be32 status;
1da177e4 714
ca364317
BF		 715 status = nfsd_link(rqstp, &cstate->current_fh,
716 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 717 if (!status)
ca364317 718 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 719 return status;
720}
721
0ff7ab46 722static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 723{
724 struct svc_fh tmp_fh;
b37ad28b 725 __be32 ret;
1da177e4
LT		 726
727 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 728 ret = exp_pseudoroot(rqstp, &tmp_fh);
729 if (ret)
1da177e4 730 return ret;
0ff7ab46 731 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 732 fh_put(&tmp_fh);
733 return nfserr_noent;
734 }
735 fh_put(&tmp_fh);
0ff7ab46
BF		 736 return nfsd_lookup(rqstp, fh, "..", 2, fh);
737}
738
739static __be32
740nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 741 union nfsd4_op_u *u)
0ff7ab46
BF		 742{
743 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 744}
745
7191155b 746static __be32
ca364317 747nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 748 union nfsd4_op_u *u)
1da177e4 749{
ca364317 750 return nfsd_lookup(rqstp, &cstate->current_fh,
eb69853d 751 u->lookup.lo_name, u->lookup.lo_len,
ca364317 752 &cstate->current_fh);
1da177e4
LT		 753}
754
7191155b 755static __be32
ca364317 756nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 757 union nfsd4_op_u *u)
1da177e4 758{
eb69853d 759 struct nfsd4_read *read = &u->read;
b37ad28b 760 __be32 status;
1da177e4 761
7e06b7f9 762 read->rd_filp = NULL;
1da177e4
LT		 763 if (read->rd_offset >= OFFSET_MAX)
764 return nfserr_inval;
765
87c5942e
CL		 766 trace_nfsd_read_start(rqstp, &cstate->current_fh,
767 read->rd_offset, read->rd_length);
768
9b3234b9
BF		 769 /*
770 * If we do a zero copy read, then a client will see read data
771 * that reflects the state of the file *after* performing the
772 * following compound.
773 *
774 * To ensure proper ordering, we therefore turn off zero copy if
775 * the client wants us to do more in this compound:
776 */
777 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 778 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 779
1da177e4 780 /* check stateid */
aa0d6aed
AS		 781 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
782 &read->rd_stateid, RD_STATE,
783 &read->rd_filp, &read->rd_tmp_file);
af90f707 784 if (status) {
1da177e4
LT		 785 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
786 goto out;
787 }
788 status = nfs_ok;
789out:
1da177e4 790 read->rd_rqstp = rqstp;
ca364317 791 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 792 return status;
793}
794
34b1744c
BF		 795
796static void
797nfsd4_read_release(union nfsd4_op_u *u)
798{
799 if (u->read.rd_filp)
800 fput(u->read.rd_filp);
87c5942e
CL		 801 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
802 u->read.rd_offset, u->read.rd_length);
34b1744c
BF		 803}
804
7191155b 805static __be32
ca364317 806nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 807 union nfsd4_op_u *u)
1da177e4 808{
eb69853d 809 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 810 u64 cookie = readdir->rd_cookie;
811 static const nfs4_verifier zeroverf;
812
813 /* no need to check permission - this will be done in nfsd_readdir() */
814
815 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
816 return nfserr_inval;
817
916d2d84
BF		 818 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
819 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
820 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 821
832023bf 822 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 823 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
824 return nfserr_bad_cookie;
825
826 readdir->rd_rqstp = rqstp;
ca364317 827 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 828 return nfs_ok;
829}
830
7191155b 831static __be32
ca364317 832nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 833 union nfsd4_op_u *u)
1da177e4 834{
eb69853d
CH		 835 u->readlink.rl_rqstp = rqstp;
836 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 837 return nfs_ok;
838}
839
7191155b 840static __be32
ca364317 841nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 842 union nfsd4_op_u *u)
1da177e4 843{
eb69853d 844 struct nfsd4_remove *remove = &u->remove;
b37ad28b 845 __be32 status;
1da177e4 846
c87fb4a3 847 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 848 return nfserr_grace;
ca364317
BF		 849 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
850 remove->rm_name, remove->rm_namelen);
1da177e4 851 if (!status) {
ca364317
BF		 852 fh_unlock(&cstate->current_fh);
853 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 854 }
855 return status;
856}
857
7191155b 858static __be32
ca364317 859nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 860 union nfsd4_op_u *u)
1da177e4 861{
eb69853d 862 struct nfsd4_rename *rename = &u->rename;
95424460 863 __be32 status;
1da177e4 864
c87fb4a3 865 if (opens_in_grace(SVC_NET(rqstp)) &&
5ccb0066 866 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
c815afc7 867 return nfserr_grace;
ca364317
BF		 868 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
869 rename->rn_snamelen, &cstate->current_fh,
1da177e4 870 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 871 if (status)
872 return status;
873 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
874 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
875 return nfs_ok;
1da177e4
LT		 876}
877
dcb488a3
AA		 878static __be32
879nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 880 union nfsd4_op_u *u)
dcb488a3 881{
eb69853d 882 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 883 struct svc_export *exp;
884 struct dentry *dentry;
885 __be32 err;
886
29a78a3e
BF		 887 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
888 if (err)
889 return err;
dcb488a3
AA		 890 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
891 secinfo->si_name, secinfo->si_namelen,
892 &exp, &dentry);
893 if (err)
894 return err;
2f6fc056 895 fh_unlock(&cstate->current_fh);
2b0143b5 896 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 897 exp_put(exp);
898 err = nfserr_noent;
899 } else
900 secinfo->si_exp = exp;
901 dput(dentry);
56560b9a
BF		 902 if (cstate->minorversion)
903 /* See rfc 5661 section 2.6.3.1.1.8 */
904 fh_put(&cstate->current_fh);
dcb488a3
AA		 905 return err;
906}
907
04f4ad16
BF		 908static __be32
909nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 910 union nfsd4_op_u *u)
04f4ad16
BF		 911{
912 __be32 err;
913
eb69853d 914 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 915 case NFS4_SECINFO_STYLE4_CURRENT_FH:
916 break;
917 case NFS4_SECINFO_STYLE4_PARENT:
918 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
919 if (err)
920 return err;
921 break;
922 default:
923 return nfserr_inval;
924 }
bf18f163 925
eb69853d 926 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 927 fh_put(&cstate->current_fh);
928 return nfs_ok;
929}
930
34b1744c
BF		 931static void
932nfsd4_secinfo_release(union nfsd4_op_u *u)
933{
934 if (u->secinfo.si_exp)
935 exp_put(u->secinfo.si_exp);
936}
937
ec572b9e
EG		 938static void
939nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
940{
941 if (u->secinfo_no_name.sin_exp)
942 exp_put(u->secinfo_no_name.sin_exp);
943}
944
7191155b 945static __be32
ca364317 946nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 947 union nfsd4_op_u *u)
1da177e4 948{
eb69853d 949 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 950 __be32 status = nfs_ok;
96f6f985 951 int err;
1da177e4 952
1da177e4 953 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 954 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed
AS		 955 &cstate->current_fh, &setattr->sa_stateid,
956 WR_STATE, NULL, NULL);
375c5547 957 if (status) {
3e3b4800 958 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 959 return status;
960 }
1da177e4 961 }
96f6f985
AV		 962 err = fh_want_write(&cstate->current_fh);
963 if (err)
964 return nfserrno(err);
1da177e4 965 status = nfs_ok;
3c8e0316
YZ		 966
967 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
968 nfsd_attrmask);
969 if (status)
970 goto out;
971
1da177e4 972 if (setattr->sa_acl != NULL)
ca364317
BF		 973 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
974 setattr->sa_acl);
1da177e4 975 if (status)
18f335af 976 goto out;
18032ca0
DQ		 977 if (setattr->sa_label.len)
978 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
979 &setattr->sa_label);
980 if (status)
981 goto out;
ca364317 982 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 983 0, (time_t)0);
18f335af 984out:
bad0dcff 985 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 986 return status;
987}
988
7191155b 989static __be32
ca364317 990nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 991 union nfsd4_op_u *u)
1da177e4 992{
eb69853d 993 struct nfsd4_write *write = &u->write;
1da177e4
LT		 994 stateid_t *stateid = &write->wr_stateid;
995 struct file *filp = NULL;
b37ad28b 996 __be32 status = nfs_ok;
31dec253 997 unsigned long cnt;
ffe1137b 998 int nvecs;
1da177e4 999
1da177e4
LT		 1000 if (write->wr_offset >= OFFSET_MAX)
1001 return nfserr_inval;
1002
d890be15
CL		 1003 cnt = write->wr_buflen;
1004 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1005 write->wr_offset, cnt);
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
1da177e4 1013 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1014 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1015
3fd9557a
CL		 1016 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1017 &write->wr_head, write->wr_buflen);
1018 if (!nvecs)
1019 return nfserr_io;
ffe1137b
BF		 1020 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1021
af90f707
CH		 1022 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1023 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 1024 write->wr_how_written);
af90f707 1025 fput(filp);
1da177e4 1026
31dec253 1027 write->wr_bytes_written = cnt;
d890be15
CL		 1028 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1029 write->wr_offset, cnt);
1da177e4 1030 return status;
1da177e4
LT		 1031}
1032
ffa0160a 1033static __be32
29ae7f9d
AS		 1034nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1035 stateid_t *src_stateid, struct file **src,
1036 stateid_t *dst_stateid, struct file **dst)
ffa0160a 1037{
ffa0160a
CH		 1038 __be32 status;
1039
1040 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
29ae7f9d 1041 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1042 if (status) {
1043 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1044 goto out;
1045 }
1046
1047 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
29ae7f9d 1048 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1049 if (status) {
1050 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1051 goto out_put_src;
1052 }
1053
1054 /* fix up for NFS-specific error code */
29ae7f9d
AS		 1055 if (!S_ISREG(file_inode(*src)->i_mode) ||
1056 !S_ISREG(file_inode(*dst)->i_mode)) {
ffa0160a
CH		 1057 status = nfserr_wrong_type;
1058 goto out_put_dst;
1059 }
1060
29ae7f9d
AS		 1061out:
1062 return status;
1063out_put_dst:
1064 fput(*dst);
1065out_put_src:
1066 fput(*src);
1067 goto out;
1068}
1069
1070static __be32
1071nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1072 union nfsd4_op_u *u)
29ae7f9d 1073{
eb69853d 1074 struct nfsd4_clone *clone = &u->clone;
29ae7f9d
AS		 1075 struct file *src, *dst;
1076 __be32 status;
1077
1078 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1079 &clone->cl_dst_stateid, &dst);
1080 if (status)
1081 goto out;
1082
ffa0160a
CH		 1083 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1084 dst, clone->cl_dst_pos, clone->cl_count);
1085
ffa0160a 1086 fput(dst);
ffa0160a
CH		 1087 fput(src);
1088out:
1089 return status;
1090}
1091
29ae7f9d
AS		 1092static __be32
1093nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1094 union nfsd4_op_u *u)
29ae7f9d 1095{
eb69853d 1096 struct nfsd4_copy *copy = &u->copy;
29ae7f9d
AS		 1097 struct file *src, *dst;
1098 __be32 status;
1099 ssize_t bytes;
1100
1101 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1102 &copy->cp_dst_stateid, &dst);
1103 if (status)
1104 goto out;
1105
1106 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1107 dst, copy->cp_dst_pos, copy->cp_count);
1108
1109 if (bytes < 0)
1110 status = nfserrno(bytes);
1111 else {
1112 copy->cp_res.wr_bytes_written = bytes;
1113 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
29ae7f9d
AS		 1114 copy->cp_synchronous = 1;
1115 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1116 status = nfs_ok;
1117 }
1118
1119 fput(src);
1120 fput(dst);
1121out:
1122 return status;
1123}
1124
95d871f0
AS		 1125static __be32
1126nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1127 struct nfsd4_fallocate *fallocate, int flags)
1128{
1129 __be32 status = nfserr_notsupp;
1130 struct file *file;
1131
aa0d6aed 1132 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1133 &fallocate->falloc_stateid,
af90f707 1134 WR_STATE, &file, NULL);
95d871f0
AS		 1135 if (status != nfs_ok) {
1136 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1137 return status;
1138 }
1139
1140 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1141 fallocate->falloc_offset,
1142 fallocate->falloc_length,
1143 flags);
1144 fput(file);
1145 return status;
1146}
1147
1148static __be32
1149nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1150 union nfsd4_op_u *u)
95d871f0 1151{
eb69853d 1152 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1153}
1154
b0cb9085
AS		 1155static __be32
1156nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1157 union nfsd4_op_u *u)
b0cb9085 1158{
eb69853d 1159 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1160 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1161}
1162
24bab491
AS		 1163static __be32
1164nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1165 union nfsd4_op_u *u)
24bab491 1166{
eb69853d 1167 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1168 int whence;
1169 __be32 status;
1170 struct file *file;
1171
aa0d6aed 1172 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1173 &seek->seek_stateid,
af90f707 1174 RD_STATE, &file, NULL);
24bab491
AS		 1175 if (status) {
1176 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1177 return status;
1178 }
1179
1180 switch (seek->seek_whence) {
1181 case NFS4_CONTENT_DATA:
1182 whence = SEEK_DATA;
1183 break;
1184 case NFS4_CONTENT_HOLE:
1185 whence = SEEK_HOLE;
1186 break;
1187 default:
1188 status = nfserr_union_notsupp;
1189 goto out;
1190 }
1191
1192 /*
1193 * Note: This call does change file->f_pos, but nothing in NFSD
1194 * should ever file->f_pos.
1195 */
1196 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1197 if (seek->seek_pos < 0)
1198 status = nfserrno(seek->seek_pos);
1199 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1200 seek->seek_eof = true;
1201
1202out:
1203 fput(file);
1204 return status;
1205}
1206
1da177e4
LT		 1207/* This routine never returns NFS_OK! If there are no other errors, it
1208 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1209 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1210 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1211 */
b37ad28b 1212static __be32
c954e2a5 1213_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1214 struct nfsd4_verify *verify)
1da177e4 1215{
2ebbc012 1216 __be32 *buf, *p;
1da177e4 1217 int count;
b37ad28b 1218 __be32 status;
1da177e4 1219
8837abca 1220 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1221 if (status)
1222 return status;
1223
3c8e0316
YZ		 1224 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1225 if (status)
1226 return status;
1227
1da177e4
LT		 1228 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1229 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1230 return nfserr_inval;
1231 if (verify->ve_attrlen & 3)
1232 return nfserr_inval;
1233
1234 /* count in words:
1235 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1236 */
1237 count = 4 + (verify->ve_attrlen >> 2);
1238 buf = kmalloc(count << 2, GFP_KERNEL);
1239 if (!buf)
3e772463 1240 return nfserr_jukebox;
1da177e4 1241
84822d0b 1242 p = buf;
d5184658 1243 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1244 cstate->current_fh.fh_export,
d5184658
BF		 1245 cstate->current_fh.fh_dentry,
1246 verify->ve_bmval,
406a7ea9 1247 rqstp, 0);
41ae6e71
BF		 1248 /*
1249 * If nfsd4_encode_fattr() ran out of space, assume that's because
1250 * the attributes are longer (hence different) than those given:
1251 */
84822d0b 1252 if (status == nfserr_resource)
1da177e4
LT		 1253 status = nfserr_not_same;
1254 if (status)
1255 goto out_kfree;
1256
95ec28cd
BH		 1257 /* skip bitmap */
1258 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1259 status = nfserr_not_same;
1260 if (ntohl(*p++) != verify->ve_attrlen)
1261 goto out_kfree;
1262 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1263 status = nfserr_same;
1264
1265out_kfree:
1266 kfree(buf);
1267 return status;
1268}
1269
c954e2a5
BF		 1270static __be32
1271nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1272 union nfsd4_op_u *u)
c954e2a5
BF		 1273{
1274 __be32 status;
1275
eb69853d 1276 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1277 return status == nfserr_not_same ? nfs_ok : status;
1278}
1279
1280static __be32
1281nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1282 union nfsd4_op_u *u)
c954e2a5
BF		 1283{
1284 __be32 status;
1285
eb69853d 1286 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1287 return status == nfserr_same ? nfs_ok : status;
1288}
1289
9cf514cc
CH		 1290#ifdef CONFIG_NFSD_PNFS
1291static const struct nfsd4_layout_ops *
1292nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1293{
8a4c3926 1294 if (!exp->ex_layout_types) {
9cf514cc
CH		 1295 dprintk("%s: export does not support pNFS\n", __func__);
1296 return NULL;
1297 }
1298
b550a32e
AK		 1299 if (layout_type >= LAYOUT_TYPE_MAX ||
1300 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1301 dprintk("%s: layout type %d not supported\n",
1302 __func__, layout_type);
1303 return NULL;
1304 }
1305
1306 return nfsd4_layout_ops[layout_type];
1307}
1308
1309static __be32
1310nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1311 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1312{
eb69853d 1313 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1314 const struct nfsd4_layout_ops *ops;
1315 struct nfsd4_deviceid_map *map;
1316 struct svc_export *exp;
1317 __be32 nfserr;
1318
1319 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1320 __func__,
1321 gdp->gd_layout_type,
1322 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1323 gdp->gd_maxcount);
1324
1325 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1326 if (!map) {
1327 dprintk("%s: couldn't find device ID to export mapping!\n",
1328 __func__);
1329 return nfserr_noent;
1330 }
1331
1332 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1333 if (IS_ERR(exp)) {
1334 dprintk("%s: could not find device id\n", __func__);
1335 return nfserr_noent;
1336 }
1337
1338 nfserr = nfserr_layoutunavailable;
1339 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1340 if (!ops)
1341 goto out;
1342
1343 nfserr = nfs_ok;
f99d4fbd
CH		 1344 if (gdp->gd_maxcount != 0) {
1345 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1346 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1347 }
9cf514cc
CH		 1348
1349 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1350out:
a1420384 1351 exp_put(exp);
9cf514cc
CH		 1352 return nfserr;
1353}
1354
34b1744c
BF		 1355static void
1356nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1357{
1358 kfree(u->getdeviceinfo.gd_device);
1359}
1360
9cf514cc
CH		 1361static __be32
1362nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1363 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1364{
eb69853d 1365 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1366 struct svc_fh *current_fh = &cstate->current_fh;
1367 const struct nfsd4_layout_ops *ops;
1368 struct nfs4_layout_stateid *ls;
1369 __be32 nfserr;
66282ec1 1370 int accmode = NFSD_MAY_READ_IF_EXEC;
9cf514cc
CH		 1371
1372 switch (lgp->lg_seg.iomode) {
1373 case IOMODE_READ:
66282ec1 1374 accmode |= NFSD_MAY_READ;
9cf514cc
CH		 1375 break;
1376 case IOMODE_RW:
66282ec1 1377 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
9cf514cc
CH		 1378 break;
1379 default:
1380 dprintk("%s: invalid iomode %d\n",
1381 __func__, lgp->lg_seg.iomode);
1382 nfserr = nfserr_badiomode;
1383 goto out;
1384 }
1385
1386 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1387 if (nfserr)
1388 goto out;
1389
1390 nfserr = nfserr_layoutunavailable;
1391 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1392 if (!ops)
1393 goto out;
1394
1395 /*
1396 * Verify minlength and range as per RFC5661:
1397 * o If loga_length is less than loga_minlength,
1398 * the metadata server MUST return NFS4ERR_INVAL.
1399 * o If the sum of loga_offset and loga_minlength exceeds
1400 * NFS4_UINT64_MAX, and loga_minlength is not
1401 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1402 * o If the sum of loga_offset and loga_length exceeds
1403 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1404 * the error NFS4ERR_INVAL MUST result.
1405 */
1406 nfserr = nfserr_inval;
1407 if (lgp->lg_seg.length < lgp->lg_minlength ||
1408 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1409 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1410 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1411 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1412 goto out;
1413 if (lgp->lg_seg.length == 0)
1414 goto out;
1415
1416 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1417 true, lgp->lg_layout_type, &ls);
31ef83dc 1418 if (nfserr) {
f394b62b 1419 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1420 goto out;
31ef83dc 1421 }
9cf514cc 1422
c5c707f9
CH		 1423 nfserr = nfserr_recallconflict;
1424 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1425 goto out_put_stid;
1426
2b0143b5 1427 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1428 current_fh, lgp);
1429 if (nfserr)
1430 goto out_put_stid;
1431
1432 nfserr = nfsd4_insert_layout(lgp, ls);
1433
1434out_put_stid:
cc8a5532 1435 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1436 nfs4_put_stid(&ls->ls_stid);
1437out:
1438 return nfserr;
1439}
1440
34b1744c
BF		 1441static void
1442nfsd4_layoutget_release(union nfsd4_op_u *u)
1443{
1444 kfree(u->layoutget.lg_content);
1445}
1446
9cf514cc
CH		 1447static __be32
1448nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1449 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1450{
eb69853d 1451 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1452 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1453 struct svc_fh *current_fh = &cstate->current_fh;
1454 const struct nfsd4_layout_ops *ops;
1455 loff_t new_size = lcp->lc_last_wr + 1;
1456 struct inode *inode;
1457 struct nfs4_layout_stateid *ls;
1458 __be32 nfserr;
1459
1460 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1461 if (nfserr)
1462 goto out;
1463
1464 nfserr = nfserr_layoutunavailable;
1465 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1466 if (!ops)
1467 goto out;
2b0143b5 1468 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1469
1470 nfserr = nfserr_inval;
1471 if (new_size <= seg->offset) {
1472 dprintk("pnfsd: last write before layout segment\n");
1473 goto out;
1474 }
1475 if (new_size > seg->offset + seg->length) {
1476 dprintk("pnfsd: last write beyond layout segment\n");
1477 goto out;
1478 }
1479 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1480 dprintk("pnfsd: layoutcommit beyond EOF\n");
1481 goto out;
1482 }
1483
1484 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1485 false, lcp->lc_layout_type,
1486 &ls);
1487 if (nfserr) {
f394b62b 1488 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1489 /* fixup error code as per RFC5661 */
1490 if (nfserr == nfserr_bad_stateid)
1491 nfserr = nfserr_badlayout;
1492 goto out;
1493 }
1494
cc8a5532
JL		 1495 /* LAYOUTCOMMIT does not require any serialization */
1496 mutex_unlock(&ls->ls_mutex);
1497
9cf514cc
CH		 1498 if (new_size > i_size_read(inode)) {
1499 lcp->lc_size_chg = 1;
1500 lcp->lc_newsize = new_size;
1501 } else {
1502 lcp->lc_size_chg = 0;
1503 }
1504
d8398fc1 1505 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1506 nfs4_put_stid(&ls->ls_stid);
1507out:
1508 return nfserr;
1509}
1510
1511static __be32
1512nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 1513 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1514{
eb69853d 1515 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 1516 struct svc_fh *current_fh = &cstate->current_fh;
1517 __be32 nfserr;
1518
1519 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1520 if (nfserr)
1521 goto out;
1522
1523 nfserr = nfserr_layoutunavailable;
1524 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1525 goto out;
1526
1527 switch (lrp->lr_seg.iomode) {
1528 case IOMODE_READ:
1529 case IOMODE_RW:
1530 case IOMODE_ANY:
1531 break;
1532 default:
1533 dprintk("%s: invalid iomode %d\n", __func__,
1534 lrp->lr_seg.iomode);
1535 nfserr = nfserr_inval;
1536 goto out;
1537 }
1538
1539 switch (lrp->lr_return_type) {
1540 case RETURN_FILE:
1541 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1542 break;
1543 case RETURN_FSID:
1544 case RETURN_ALL:
1545 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1546 break;
1547 default:
1548 dprintk("%s: invalid return_type %d\n", __func__,
1549 lrp->lr_return_type);
1550 nfserr = nfserr_inval;
1551 break;
1552 }
1553out:
1554 return nfserr;
1555}
1556#endif /* CONFIG_NFSD_PNFS */
1557
1da177e4
LT		 1558/*
1559 * NULL call.
1560 */
7111c66e 1561static __be32
a6beb732 1562nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 1563{
1564 return nfs_ok;
1565}
1566
e2b20950
SA		 1567static inline void nfsd4_increment_op_stats(u32 opnum)
1568{
1569 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1570 nfsdstats.nfs4_opcount[opnum]++;
1571}
1572
bb2a8b0c 1573static const struct nfsd4_operation nfsd4_ops[];
b591480b 1574
f1c7f79b 1575static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1576
f9bb94c4 1577/*
57716355 1578 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1579 *
57716355
BF		 1580 * Also note, enforced elsewhere:
1581 * - SEQUENCE other than as first op results in
1582 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1583 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1584 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1585 * - DESTROY_SESSION must be the final operation in a compound, if
1586 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1587 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1588 */
57716355 1589static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1590{
7a04cfda 1591 struct nfsd4_op *first_op = &args->ops[0];
57716355
BF		 1592
1593 /* These ordering requirements don't apply to NFSv4.0: */
1594 if (args->minorversion == 0)
1595 return nfs_ok;
1596 /* This is weird, but OK, not our problem: */
1597 if (args->opcnt == 0)
1598 return nfs_ok;
7a04cfda 1599 if (first_op->status == nfserr_op_illegal)
57716355 1600 return nfs_ok;
7a04cfda 1601 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
57716355 1602 return nfserr_op_not_in_session;
7a04cfda 1603 if (first_op->opnum == OP_SEQUENCE)
57716355 1604 return nfs_ok;
7a04cfda
BF		 1605 /*
1606 * So first_op is something allowed outside a session, like
1607 * EXCHANGE_ID; but then it has to be the only op in the
1608 * compound:
1609 */
57716355
BF		 1610 if (args->opcnt != 1)
1611 return nfserr_not_only_op;
1612 return nfs_ok;
f9bb94c4
AA		 1613}
1614
f4f9ef4a 1615const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 1616{
1617 return &nfsd4_ops[op->opnum];
1618}
1619
1091006c
BF		 1620bool nfsd4_cache_this_op(struct nfsd4_op *op)
1621{
e372ba60
BF		 1622 if (op->opnum == OP_ILLEGAL)
1623 return false;
c856694e 1624 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1625}
1626
68d93184
BF		 1627static bool need_wrongsec_check(struct svc_rqst *rqstp)
1628{
1629 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1630 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1631 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1632 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 1633 const struct nfsd4_operation *thisd = OPDESC(this);
1634 const struct nfsd4_operation *nextd;
68d93184 1635
68d93184
BF		 1636 /*
1637 * Most ops check wronsec on our own; only the putfh-like ops
1638 * have special rules.
1639 */
1640 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1641 return false;
1642 /*
1643 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1644 * put-filehandle operation if we're not going to use the
1645 * result:
1646 */
1647 if (argp->opcnt == resp->opcnt)
1648 return false;
51904b08
BF		 1649 if (next->opnum == OP_ILLEGAL)
1650 return false;
68d93184
BF		 1651 nextd = OPDESC(next);
1652 /*
1653 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1654 * errors themselves as necessary; others should check for them
1655 * now:
1656 */
1657 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1658}
1659
2d124dfa
BF		 1660static void svcxdr_init_encode(struct svc_rqst *rqstp,
1661 struct nfsd4_compoundres *resp)
1662{
1663 struct xdr_stream *xdr = &resp->xdr;
1664 struct xdr_buf *buf = &rqstp->rq_res;
1665 struct kvec *head = buf->head;
1666
1667 xdr->buf = buf;
ddd1ea56 1668 xdr->iov = head;
2d124dfa 1669 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1670 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1671 /* Tail and page_len should be zero at this point: */
1672 buf->len = buf->head[0].iov_len;
2825a7f9 1673 xdr->scratch.iov_len = 0;
05638dc7 1674 xdr->page_ptr = buf->pages - 1;
2825a7f9 1675 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1676 - rqstp->rq_auth_slack;
2d124dfa
BF		 1677}
1678
1da177e4
LT		 1679/*
1680 * COMPOUND call.
1681 */
7111c66e 1682static __be32
a6beb732 1683nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 1684{
a6beb732
CH		 1685 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1686 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 1687 struct nfsd4_op *op;
e354d571 1688 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1689 struct svc_fh *current_fh = &cstate->current_fh;
1690 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1691 __be32 status;
1da177e4 1692
2d124dfa 1693 svcxdr_init_encode(rqstp, resp);
4aea24b2 1694 resp->tagp = resp->xdr.p;
1da177e4 1695 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1696 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1697 resp->taglen = args->taglen;
1698 resp->tag = args->tag;
1da177e4 1699 resp->rqstp = rqstp;
4daeed25 1700 cstate->minorversion = args->minorversion;
4daeed25
KM		 1701 fh_init(current_fh, NFS4_FHSIZE);
1702 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1703 /*
1704 * Don't use the deferral mechanism for NFSv4; compounds make it
1705 * too hard to avoid non-idempotency problems.
1706 */
30660e04 1707 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1708
1709 /*
1710 * According to RFC3010, this takes precedence over all other errors.
1711 */
1712 status = nfserr_minor_vers_mismatch;
35f7a14f 1713 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4 1714 goto out;
0078117c
BF		 1715 status = nfserr_resource;
1716 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1717 goto out;
1da177e4 1718
57716355
BF		 1719 status = nfs41_check_op_ordering(args);
1720 if (status) {
f9bb94c4 1721 op = &args->ops[0];
57716355 1722 op->status = status;
5b7b15ae 1723 resp->opcnt = 1;
f9bb94c4
AA		 1724 goto encode_op;
1725 }
1726
fff4080b 1727 trace_nfsd_compound(rqstp, args->opcnt);
1da177e4
LT		 1728 while (!status && resp->opcnt < args->opcnt) {
1729 op = &args->ops[resp->opcnt++];
1730
1731 /*
1732 * The XDR decode routines may have pre-set op->status;
1733 * for example, if there is a miscellaneous XDR error
1734 * it will be set to nfserr_bad_xdr.
1735 */
9d313b17
BF		 1736 if (op->status) {
1737 if (op->opnum == OP_OPEN)
1738 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1739 goto encode_op;
9d313b17 1740 }
1da177e4 1741
4daeed25 1742 if (!current_fh->fh_dentry) {
f4f9ef4a 1743 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1744 op->status = nfserr_nofilehandle;
1745 goto encode_op;
1746 }
4daeed25 1747 } else if (current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 1748 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1749 op->status = nfserr_moved;
1da177e4
LT		 1750 goto encode_op;
1751 }
b591480b 1752
2336745e
KM		 1753 fh_clear_wcc(current_fh);
1754
58e7b33a 1755 /* If op is non-idempotent */
f4f9ef4a 1756 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1757 /*
a8095f7e
BF		 1758 * Don't execute this op if we couldn't encode a
1759 * succesful reply:
1760 */
f4f9ef4a 1761 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 1762 /*
1763 * Plus if there's another operation, make sure
4c69d585
BF		 1764 * we'll have space to at least encode an error:
1765 */
1766 if (resp->opcnt < args->opcnt)
1767 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1768 op->status = nfsd4_check_resp_size(resp, plen);
1769 }
1770
1771 if (op->status)
1772 goto encode_op;
1773
f4f9ef4a
BF		 1774 if (op->opdesc->op_get_currentstateid)
1775 op->opdesc->op_get_currentstateid(cstate, &op->u);
1776 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1777
9a307403
BF		 1778 /* Only from SEQUENCE */
1779 if (cstate->status == nfserr_replay_cache) {
1780 dprintk("%s NFS4.1 replay from cache\n", __func__);
1781 status = op->status;
1782 goto out;
1783 }
8b70484c 1784 if (!op->status) {
f4f9ef4a
BF		 1785 if (op->opdesc->op_set_currentstateid)
1786 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 1787
f4f9ef4a 1788 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1789 clear_current_stateid(cstate);
8b70484c
TM		 1790
1791 if (need_wrongsec_check(rqstp))
4daeed25 1792 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1793 }
1da177e4 1794encode_op:
a90b061c 1795 if (op->status == nfserr_replay_me) {
a4f1706a 1796 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1797 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1798 status = op->status = op->replay->rp_status;
1799 } else {
1800 nfsd4_encode_operation(resp, op);
1801 status = op->status;
1802 }
0407717d 1803
fff4080b
CL		 1804 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
1805 nfsd4_op_name(op->opnum));
0407717d 1806
58fb12e6 1807 nfsd4_cstate_clear_replay(cstate);
e2b20950 1808 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1809 }
1810
4daeed25
KM		 1811 cstate->status = status;
1812 fh_put(current_fh);
1813 fh_put(save_fh);
1814 BUG_ON(cstate->replay_owner);
1da177e4 1815out:
2f425878 1816 /* Reset deferral mechanism for RPC deferrals */
30660e04 1817 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1818 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1819 return status;
1820}
1821
58e7b33a
MJ		 1822#define op_encode_hdr_size (2)
1823#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1824#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1825#define op_encode_change_info_maxsz (5)
1826#define nfs4_fattr_bitmap_maxsz (4)
1827
8c7424cf
BF		 1828/* We'll fall back on returning no lockowner if run out of space: */
1829#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1830#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1831
1832#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1833
1834#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1835#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1836 op_encode_ace_maxsz)
1837
1838#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1839
1840static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1841{
1842 return (op_encode_hdr_size) * sizeof(__be32);
1843}
1844
1845static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1846{
1847 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1848}
1849
2282cd2c
KM		 1850static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1851{
1852 /* ac_supported, ac_resp_access */
1853 return (op_encode_hdr_size + 2)* sizeof(__be32);
1854}
1855
58e7b33a
MJ		 1856static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1857{
1858 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1859}
1860
1861static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1862{
1863 return (op_encode_hdr_size + op_encode_change_info_maxsz
1864 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1865}
1866
b86cef60
BF		 1867/*
1868 * Note since this is an idempotent operation we won't insist on failing
1869 * the op prematurely if the estimate is too large. We may turn off splice
1870 * reads unnecessarily.
1871 */
1872static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1873 struct nfsd4_op *op)
1874{
1875 u32 *bmap = op->u.getattr.ga_bmval;
1876 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1877 u32 ret = 0;
1878
1879 if (bmap0 & FATTR4_WORD0_ACL)
1880 return svc_max_payload(rqstp);
1881 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1882 return svc_max_payload(rqstp);
1883
1884 if (bmap1 & FATTR4_WORD1_OWNER) {
1885 ret += IDMAP_NAMESZ + 4;
1886 bmap1 &= ~FATTR4_WORD1_OWNER;
1887 }
1888 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1889 ret += IDMAP_NAMESZ + 4;
1890 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1891 }
1892 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1893 ret += NFS4_FHSIZE + 4;
1894 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1895 }
1896 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 1897 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 1898 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1899 }
1900 /*
1901 * Largest of remaining attributes are 16 bytes (e.g.,
1902 * supported_attributes)
1903 */
1904 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1905 /* bitmask, length */
1906 ret += 20;
1907 return ret;
1908}
1909
2282cd2c
KM		 1910static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1911{
1912 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1913}
1914
58e7b33a
MJ		 1915static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1916{
1917 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1918 * sizeof(__be32);
1919}
1920
1921static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1922{
1923 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1924 * sizeof(__be32);
1925}
1926
1927static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1928{
1929 return (op_encode_hdr_size + op_encode_stateid_maxsz
1930 + op_encode_change_info_maxsz + 1
1931 + nfs4_fattr_bitmap_maxsz
1932 + op_encode_delegation_maxsz) * sizeof(__be32);
1933}
1934
1935static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1936{
1937 u32 maxcount = 0, rlen = 0;
1938
1939 maxcount = svc_max_payload(rqstp);
3c7aa15d 1940 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1941
622f560e 1942 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1943}
1944
1945static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1946{
3c7aa15d 1947 u32 maxcount = 0, rlen = 0;
58e7b33a 1948
3c7aa15d
KM		 1949 maxcount = svc_max_payload(rqstp);
1950 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1951
561f0ed4
BF		 1952 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1953 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1954}
1955
2282cd2c
KM		 1956static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1957{
1958 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1959}
1960
58e7b33a
MJ		 1961static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1962{
1963 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1964 * sizeof(__be32);
1965}
1966
1967static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1968{
1969 return (op_encode_hdr_size + op_encode_change_info_maxsz
1970 + op_encode_change_info_maxsz) * sizeof(__be32);
1971}
1972
ccae70a9
BF		 1973static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1974 struct nfsd4_op *op)
1975{
d1d84c96
BF		 1976 return (op_encode_hdr_size
1977 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1978}
1979
2282cd2c
KM		 1980static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1981{
1982 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1983 * sizeof(__be32);
1984}
1985
58e7b33a
MJ		 1986static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1987{
1988 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1989}
1990
2282cd2c
KM		 1991static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1992{
1993 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1994 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
1995}
1996
58e7b33a
MJ		 1997static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1998{
480efaee
BF		 1999 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2000 sizeof(__be32);
58e7b33a
MJ		 2001}
2002
2003static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2004{
f34e432b 2005 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2006}
2007
2008static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2009{
2010 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2011 1 + 1 + /* eir_flags, spr_how */\
2012 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2013 2 + /*eir_server_owner.so_minor_id */\
2014 /* eir_server_owner.so_major_id<> */\
2015 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2016 /* eir_server_scope<> */\
2017 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2018 1 + /* eir_server_impl_id array length */\
2019 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2020}
2021
2022static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2023{
2024 return (op_encode_hdr_size + \
2025 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2026 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2027}
2028
2029static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2030{
2031 return (op_encode_hdr_size + \
2032 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2033 2 + /* csr_sequence, csr_flags */\
2034 op_encode_channel_attrs_maxsz + \
2035 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2036}
2037
29ae7f9d
AS		 2038static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2039{
2040 return (op_encode_hdr_size +
2041 1 /* wr_callback */ +
2042 op_encode_stateid_maxsz /* wr_callback */ +
2043 2 /* wr_count */ +
2044 1 /* wr_committed */ +
2045 op_encode_verifier_maxsz +
2046 1 /* cr_consecutive */ +
2047 1 /* cr_synchronous */) * sizeof(__be32);
2048}
2049
9cf514cc 2050#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2051static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2052{
2053 u32 maxcount = 0, rlen = 0;
2054
2055 maxcount = svc_max_payload(rqstp);
2056 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2057
2058 return (op_encode_hdr_size +
2059 1 /* gd_layout_type*/ +
2060 XDR_QUADLEN(rlen) +
2061 2 /* gd_notify_types */) * sizeof(__be32);
2062}
2063
9cf514cc
CH		 2064/*
2065 * At this stage we don't really know what layout driver will handle the request,
2066 * so we need to define an arbitrary upper bound here.
2067 */
2068#define MAX_LAYOUT_SIZE 128
2069static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2070{
2071 return (op_encode_hdr_size +
2072 1 /* logr_return_on_close */ +
2073 op_encode_stateid_maxsz +
2074 1 /* nr of layouts */ +
2075 MAX_LAYOUT_SIZE) * sizeof(__be32);
2076}
2077
2078static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2079{
2080 return (op_encode_hdr_size +
2081 1 /* locr_newsize */ +
2082 2 /* ns_size */) * sizeof(__be32);
2083}
2084
2085static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2086{
2087 return (op_encode_hdr_size +
2088 1 /* lrs_stateid */ +
2089 op_encode_stateid_maxsz) * sizeof(__be32);
2090}
2091#endif /* CONFIG_NFSD_PNFS */
2092
2282cd2c
KM		 2093
2094static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2095{
2096 return (op_encode_hdr_size + 3) * sizeof(__be32);
2097}
2098
bb2a8b0c 2099static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2100 [OP_ACCESS] = {
eb69853d 2101 .op_func = nfsd4_access,
b001a1b6 2102 .op_name = "OP_ACCESS",
1c122638 2103 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2104 },
2105 [OP_CLOSE] = {
eb69853d 2106 .op_func = nfsd4_close,
58e7b33a 2107 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2108 .op_name = "OP_CLOSE",
1c122638 2109 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2110 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2111 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2112 },
2113 [OP_COMMIT] = {
eb69853d 2114 .op_func = nfsd4_commit,
58e7b33a 2115 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2116 .op_name = "OP_COMMIT",
1c122638 2117 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2118 },
2119 [OP_CREATE] = {
eb69853d 2120 .op_func = nfsd4_create,
d1471053 2121 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2122 .op_name = "OP_CREATE",
1c122638 2123 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2124 },
2125 [OP_DELEGRETURN] = {
eb69853d 2126 .op_func = nfsd4_delegreturn,
58e7b33a 2127 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2128 .op_name = "OP_DELEGRETURN",
58e7b33a 2129 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2130 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2131 },
2132 [OP_GETATTR] = {
eb69853d 2133 .op_func = nfsd4_getattr,
eeac294e 2134 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2135 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2136 .op_name = "OP_GETATTR",
b591480b
BF		 2137 },
2138 [OP_GETFH] = {
eb69853d 2139 .op_func = nfsd4_getfh,
b001a1b6 2140 .op_name = "OP_GETFH",
1c122638 2141 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2142 },
2143 [OP_LINK] = {
eb69853d 2144 .op_func = nfsd4_link,
c856694e
BF		 2145 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2146 | OP_CACHEME,
b001a1b6 2147 .op_name = "OP_LINK",
1c122638 2148 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2149 },
2150 [OP_LOCK] = {
eb69853d 2151 .op_func = nfsd4_lock,
b7571e4c
BF		 2152 .op_flags = OP_MODIFIES_SOMETHING |
2153 OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2154 .op_name = "OP_LOCK",
1c122638 2155 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2156 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2157 },
2158 [OP_LOCKT] = {
eb69853d 2159 .op_func = nfsd4_lockt,
b7571e4c 2160 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2161 .op_name = "OP_LOCKT",
1c122638 2162 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2163 },
2164 [OP_LOCKU] = {
eb69853d 2165 .op_func = nfsd4_locku,
58e7b33a 2166 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2167 .op_name = "OP_LOCKU",
1c122638 2168 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2169 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2170 },
2171 [OP_LOOKUP] = {
eb69853d 2172 .op_func = nfsd4_lookup,
d1471053 2173 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2174 .op_name = "OP_LOOKUP",
1c122638 2175 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2176 },
2177 [OP_LOOKUPP] = {
eb69853d 2178 .op_func = nfsd4_lookupp,
d1471053 2179 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2180 .op_name = "OP_LOOKUPP",
1c122638 2181 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2182 },
2183 [OP_NVERIFY] = {
eb69853d 2184 .op_func = nfsd4_nverify,
b001a1b6 2185 .op_name = "OP_NVERIFY",
1c122638 2186 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2187 },
2188 [OP_OPEN] = {
eb69853d 2189 .op_func = nfsd4_open,
58e7b33a 2190 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2191 .op_name = "OP_OPEN",
1c122638 2192 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2193 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2194 },
2195 [OP_OPEN_CONFIRM] = {
eb69853d 2196 .op_func = nfsd4_open_confirm,
58e7b33a 2197 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2198 .op_name = "OP_OPEN_CONFIRM",
1c122638 2199 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2200 },
2201 [OP_OPEN_DOWNGRADE] = {
eb69853d 2202 .op_func = nfsd4_open_downgrade,
58e7b33a 2203 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2204 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2205 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2206 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2207 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2208 },
2209 [OP_PUTFH] = {
eb69853d 2210 .op_func = nfsd4_putfh,
68d93184 2211 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2212 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2213 .op_name = "OP_PUTFH",
1c122638 2214 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2215 },
eeac294e 2216 [OP_PUTPUBFH] = {
eb69853d 2217 .op_func = nfsd4_putrootfh,
68d93184 2218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2219 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2220 .op_name = "OP_PUTPUBFH",
1c122638 2221 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2222 },
b591480b 2223 [OP_PUTROOTFH] = {
eb69853d 2224 .op_func = nfsd4_putrootfh,
68d93184 2225 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2226 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2227 .op_name = "OP_PUTROOTFH",
1c122638 2228 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2229 },
2230 [OP_READ] = {
eb69853d 2231 .op_func = nfsd4_read,
34b1744c 2232 .op_release = nfsd4_read_release,
b001a1b6 2233 .op_name = "OP_READ",
1c122638 2234 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2235 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2236 },
2237 [OP_READDIR] = {
eb69853d 2238 .op_func = nfsd4_readdir,
b001a1b6 2239 .op_name = "OP_READDIR",
1c122638 2240 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2241 },
2242 [OP_READLINK] = {
eb69853d 2243 .op_func = nfsd4_readlink,
b001a1b6 2244 .op_name = "OP_READLINK",
1c122638 2245 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2246 },
2247 [OP_REMOVE] = {
eb69853d 2248 .op_func = nfsd4_remove,
c856694e 2249 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2250 .op_name = "OP_REMOVE",
1c122638 2251 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2252 },
2253 [OP_RENAME] = {
eb69853d 2254 .op_func = nfsd4_rename,
c856694e 2255 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2256 .op_name = "OP_RENAME",
1c122638 2257 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2258 },
2259 [OP_RENEW] = {
eb69853d 2260 .op_func = nfsd4_renew,
58e7b33a
MJ		 2261 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2262 | OP_MODIFIES_SOMETHING,
b001a1b6 2263 .op_name = "OP_RENEW",
1c122638 2264 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2265
b591480b
BF		 2266 },
2267 [OP_RESTOREFH] = {
eb69853d 2268 .op_func = nfsd4_restorefh,
68d93184 2269 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2270 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2271 .op_name = "OP_RESTOREFH",
1c122638 2272 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2273 },
2274 [OP_SAVEFH] = {
eb69853d 2275 .op_func = nfsd4_savefh,
58e7b33a 2276 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2277 .op_name = "OP_SAVEFH",
1c122638 2278 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2279 },
dcb488a3 2280 [OP_SECINFO] = {
eb69853d 2281 .op_func = nfsd4_secinfo,
34b1744c 2282 .op_release = nfsd4_secinfo_release,
68d93184 2283 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2284 .op_name = "OP_SECINFO",
1c122638 2285 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2286 },
b591480b 2287 [OP_SETATTR] = {
eb69853d 2288 .op_func = nfsd4_setattr,
b001a1b6 2289 .op_name = "OP_SETATTR",
b7571e4c
BF		 2290 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2291 | OP_NONTRIVIAL_ERROR_ENCODE,
1c122638 2292 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 2293 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 2294 },
2295 [OP_SETCLIENTID] = {
eb69853d 2296 .op_func = nfsd4_setclientid,
58e7b33a 2297 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
b7571e4c
BF		 2298 | OP_MODIFIES_SOMETHING | OP_CACHEME
2299 | OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2300 .op_name = "OP_SETCLIENTID",
1c122638 2301 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 2302 },
2303 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 2304 .op_func = nfsd4_setclientid_confirm,
58e7b33a 2305 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2306 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2307 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 2308 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2309 },
2310 [OP_VERIFY] = {
eb69853d 2311 .op_func = nfsd4_verify,
b001a1b6 2312 .op_name = "OP_VERIFY",
1c122638 2313 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2314 },
2315 [OP_WRITE] = {
eb69853d 2316 .op_func = nfsd4_write,
c856694e 2317 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2318 .op_name = "OP_WRITE",
1c122638 2319 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 2320 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 2321 },
2322 [OP_RELEASE_LOCKOWNER] = {
eb69853d 2323 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 2324 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2325 | OP_MODIFIES_SOMETHING,
b001a1b6 2326 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 2327 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2328 },
069b6ad4
AA		 2329
2330 /* NFSv4.1 operations */
2331 [OP_EXCHANGE_ID] = {
eb69853d 2332 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 2333 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2334 | OP_MODIFIES_SOMETHING,
069b6ad4 2335 .op_name = "OP_EXCHANGE_ID",
1c122638 2336 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 2337 },
cb73a9f4 2338 [OP_BACKCHANNEL_CTL] = {
eb69853d 2339 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 2340 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2341 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 2342 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 2343 },
1d1bc8f2 2344 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 2345 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2346 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2347 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2348 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 2349 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2350 },
069b6ad4 2351 [OP_CREATE_SESSION] = {
eb69853d 2352 .op_func = nfsd4_create_session,
58e7b33a
MJ		 2353 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2354 | OP_MODIFIES_SOMETHING,
069b6ad4 2355 .op_name = "OP_CREATE_SESSION",
1c122638 2356 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 2357 },
2358 [OP_DESTROY_SESSION] = {
eb69853d 2359 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 2360 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2361 | OP_MODIFIES_SOMETHING,
069b6ad4 2362 .op_name = "OP_DESTROY_SESSION",
1c122638 2363 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 2364 },
2365 [OP_SEQUENCE] = {
eb69853d 2366 .op_func = nfsd4_sequence,
f9bb94c4 2367 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2368 .op_name = "OP_SEQUENCE",
1c122638 2369 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 2370 },
094b5d74 2371 [OP_DESTROY_CLIENTID] = {
eb69853d 2372 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 2373 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2374 | OP_MODIFIES_SOMETHING,
094b5d74 2375 .op_name = "OP_DESTROY_CLIENTID",
1c122638 2376 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 2377 },
4dc6ec00 2378 [OP_RECLAIM_COMPLETE] = {
eb69853d 2379 .op_func = nfsd4_reclaim_complete,
58e7b33a 2380 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2381 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 2382 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 2383 },
04f4ad16 2384 [OP_SECINFO_NO_NAME] = {
eb69853d 2385 .op_func = nfsd4_secinfo_no_name,
ec572b9e 2386 .op_release = nfsd4_secinfo_no_name_release,
68d93184 2387 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2388 .op_name = "OP_SECINFO_NO_NAME",
1c122638 2389 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 2390 },
17456804 2391 [OP_TEST_STATEID] = {
eb69853d 2392 .op_func = nfsd4_test_stateid,
17456804
BS		 2393 .op_flags = ALLOWED_WITHOUT_FH,
2394 .op_name = "OP_TEST_STATEID",
1c122638 2395 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 2396 },
e1ca12df 2397 [OP_FREE_STATEID] = {
eb69853d 2398 .op_func = nfsd4_free_stateid,
58e7b33a 2399 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2400 .op_name = "OP_FREE_STATEID",
57832e7b 2401 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 2402 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 2403 },
9cf514cc
CH		 2404#ifdef CONFIG_NFSD_PNFS
2405 [OP_GETDEVICEINFO] = {
eb69853d 2406 .op_func = nfsd4_getdeviceinfo,
34b1744c 2407 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 2408 .op_flags = ALLOWED_WITHOUT_FH,
2409 .op_name = "OP_GETDEVICEINFO",
1c122638 2410 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 2411 },
2412 [OP_LAYOUTGET] = {
eb69853d 2413 .op_func = nfsd4_layoutget,
34b1744c 2414 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 2415 .op_flags = OP_MODIFIES_SOMETHING,
2416 .op_name = "OP_LAYOUTGET",
1c122638 2417 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 2418 },
2419 [OP_LAYOUTCOMMIT] = {
eb69853d 2420 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 2421 .op_flags = OP_MODIFIES_SOMETHING,
2422 .op_name = "OP_LAYOUTCOMMIT",
1c122638 2423 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 2424 },
2425 [OP_LAYOUTRETURN] = {
eb69853d 2426 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 2427 .op_flags = OP_MODIFIES_SOMETHING,
2428 .op_name = "OP_LAYOUTRETURN",
1c122638 2429 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 2430 },
2431#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2432
2433 /* NFSv4.2 operations */
95d871f0 2434 [OP_ALLOCATE] = {
eb69853d 2435 .op_func = nfsd4_allocate,
95d871f0
AS		 2436 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2437 .op_name = "OP_ALLOCATE",
1c122638 2438 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 2439 },
b0cb9085 2440 [OP_DEALLOCATE] = {
eb69853d 2441 .op_func = nfsd4_deallocate,
b0cb9085
AS		 2442 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2443 .op_name = "OP_DEALLOCATE",
1c122638 2444 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 2445 },
ffa0160a 2446 [OP_CLONE] = {
eb69853d 2447 .op_func = nfsd4_clone,
ffa0160a
CH		 2448 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2449 .op_name = "OP_CLONE",
1c122638 2450 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 2451 },
29ae7f9d 2452 [OP_COPY] = {
eb69853d 2453 .op_func = nfsd4_copy,
29ae7f9d
AS		 2454 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2455 .op_name = "OP_COPY",
1c122638 2456 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 2457 },
24bab491 2458 [OP_SEEK] = {
eb69853d 2459 .op_func = nfsd4_seek,
24bab491 2460 .op_name = "OP_SEEK",
1c122638 2461 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 2462 },
b591480b
BF		 2463};
2464
ed941643
AE		 2465/**
2466 * nfsd4_spo_must_allow - Determine if the compound op contains an
2467 * operation that is allowed to be sent with machine credentials
2468 *
2469 * @rqstp: a pointer to the struct svc_rqst
2470 *
2471 * Checks to see if the compound contains a spo_must_allow op
2472 * and confirms that it was sent with the proper machine creds.
2473 */
2474
2475bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2476{
2477 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2478 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2479 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2480 struct nfsd4_compound_state *cstate = &resp->cstate;
2481 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2482 u32 opiter;
2483
2484 if (!cstate->minorversion)
2485 return false;
2486
2487 if (cstate->spo_must_allowed == true)
2488 return true;
2489
2490 opiter = resp->opcnt;
2491 while (opiter < argp->opcnt) {
2492 this = &argp->ops[opiter++];
2493 if (test_bit(this->opnum, allow->u.longs) &&
2494 cstate->clp->cl_mach_cred &&
2495 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2496 cstate->spo_must_allowed = true;
2497 return true;
2498 }
2499 }
2500 cstate->spo_must_allowed = false;
2501 return false;
2502}
2503
4f0cefbf
BF		 2504int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2505{
05b7278d 2506 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 2507 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 2508
2509 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2510 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 2511}
2512
07d1f802
BF		 2513void warn_on_nonidempotent_op(struct nfsd4_op *op)
2514{
2515 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2516 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2517 op->opnum, nfsd4_op_name(op->opnum));
2518 WARN_ON_ONCE(1);
2519 }
2520}
2521
f1c7f79b 2522static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2523{
2524 if (opnum < ARRAY_SIZE(nfsd4_ops))
2525 return nfsd4_ops[opnum].op_name;
2526 return "unknown_operation";
2527}
2528
1da177e4 2529#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2530struct nfsd4_voidargs { int dummy; };
2531
860bda29 2532static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 2533 [NFSPROC4_NULL] = {
f7235b6b 2534 .pc_func = nfsd4_proc_null,
63f8de37 2535 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 2536 .pc_argsize = sizeof(struct nfsd4_voidargs),
2537 .pc_ressize = sizeof(struct nfsd4_voidres),
2538 .pc_cachetype = RC_NOCACHE,
2539 .pc_xdrressize = 1,
2540 },
2541 [NFSPROC4_COMPOUND] = {
f7235b6b 2542 .pc_func = nfsd4_proc_compound,
026fec7e 2543 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 2544 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 2545 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2546 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2547 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2548 .pc_cachetype = RC_NOCACHE,
2549 .pc_xdrressize = NFSD_BUFSIZE/4,
2550 },
1da177e4
LT		 2551};
2552
7fd38af9 2553static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 2554const struct svc_version nfsd_version4 = {
5283b03e
JL		 2555 .vs_vers = 4,
2556 .vs_nproc = 2,
2557 .vs_proc = nfsd_procedures4,
7fd38af9 2558 .vs_count = nfsd_count3,
5283b03e
JL		 2559 .vs_dispatch = nfsd_dispatch,
2560 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2561 .vs_rpcb_optnl = true,
2562 .vs_need_cong_ctrl = true,
1da177e4
LT		 2563};
2564
2565/*
2566 * Local variables:
2567 * c-basic-offset: 8
2568 * End:
2569 */
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