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[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,
a4f1706a 347 struct nfsd4_open *open)
1da177e4 348{
b37ad28b 349 __be32 status;
c0e6bee4 350 struct svc_fh *resfh = NULL;
3320fef1
SK		 351 struct net *net = SVC_NET(rqstp);
352 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
6668958f 353
fe0750e5 354 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 355 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 356 open->op_openowner);
1da177e4 357
1da177e4
LT		 358 /* This check required by spec. */
359 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
360 return nfserr_inval;
361
856121b2 362 open->op_created = 0;
ab1350b2
MJ		 363 /*
364 * RFC5661 18.51.3
365 * Before RECLAIM_COMPLETE done, server should deny new lock
366 */
367 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 368 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
369 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 370 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
371 return nfserr_grace;
372
60adfc50
AA		 373 if (nfsd4_has_session(cstate))
374 copy_clientid(&open->op_clientid, cstate->session);
375
1da177e4 376 /* check seqid for replay. set nfs4_owner */
6cd22668 377 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 378 if (status == nfserr_replay_me) {
fe0750e5 379 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 380 fh_put(&cstate->current_fh);
a4773c08
BF		 381 fh_copy_shallow(&cstate->current_fh.fh_handle,
382 &rp->rp_openfh);
8837abca 383 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 384 if (status)
385 dprintk("nfsd4_open: replay failed"
386 " restoring previous filehandle\n");
387 else
a90b061c 388 status = nfserr_replay_me;
1da177e4
LT		 389 }
390 if (status)
391 goto out;
9d313b17
BF		 392 if (open->op_xdr_error) {
393 status = open->op_xdr_error;
394 goto out;
395 }
fb553c0f 396
3c8e0316
YZ		 397 status = nfsd4_check_open_attributes(rqstp, cstate, open);
398 if (status)
399 goto out;
400
fb553c0f
BF		 401 /* Openowner is now set, so sequence id will get bumped. Now we need
402 * these checks before we do any creates: */
cbd0d51a 403 status = nfserr_grace;
c87fb4a3 404 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 405 goto out;
406 status = nfserr_no_grace;
c87fb4a3 407 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 408 goto out;
fb553c0f 409
1da177e4 410 switch (open->op_claim_type) {
0dd3c192 411 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 412 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 413 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 414 if (status)
415 goto out;
416 break;
417 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 418 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 419 cstate, nn);
0cf99b91
MJ		 420 if (status)
421 goto out;
ba5378b6 422 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
8b289b2c
BF		 423 case NFS4_OPEN_CLAIM_FH:
424 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 425 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 426 if (status)
427 goto out;
c0e6bee4 428 resfh = &cstate->current_fh;
1da177e4 429 break;
8b289b2c 430 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 431 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 432 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 433 open->op_claim_type);
434 status = nfserr_notsupp;
435 goto out;
436 default:
2fdada03 437 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 438 open->op_claim_type);
439 status = nfserr_inval;
440 goto out;
441 }
442 /*
443 * nfsd4_process_open2() does the actual opening of the file. If
444 * successful, it (1) truncates the file if open->op_truncate was
445 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
446 */
c0e6bee4 447 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 448 WARN(status && open->op_created,
449 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
450 be32_to_cpu(status));
1da177e4 451out:
c0e6bee4
BF		 452 if (resfh && resfh != &cstate->current_fh) {
453 fh_dup2(&cstate->current_fh, resfh);
454 fh_put(resfh);
455 kfree(resfh);
456 }
42297899 457 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 458 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 459 return status;
460}
461
9d313b17
BF		 462/*
463 * OPEN is the only seqid-mutating operation whose decoding can fail
464 * with a seqid-mutating error (specifically, decoding of user names in
465 * the attributes). Therefore we have to do some processing to look up
466 * the stateowner so that we can bump the seqid.
467 */
468static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
469{
470 struct nfsd4_open *open = (struct nfsd4_open *)&op->u;
471
472 if (!seqid_mutating_err(ntohl(op->status)))
473 return op->status;
474 if (nfsd4_has_session(cstate))
475 return op->status;
476 open->op_xdr_error = op->status;
477 return nfsd4_open(rqstp, cstate, open);
478}
479
1da177e4
LT		 480/*
481 * filehandle-manipulating ops.
482 */
7191155b 483static __be32
b591480b
BF		 484nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
485 struct svc_fh **getfh)
1da177e4 486{
ca364317 487 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 488 return nfserr_nofilehandle;
489
ca364317 490 *getfh = &cstate->current_fh;
1da177e4
LT		 491 return nfs_ok;
492}
493
7191155b 494static __be32
ca364317
BF		 495nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
496 struct nfsd4_putfh *putfh)
1da177e4 497{
ca364317
BF		 498 fh_put(&cstate->current_fh);
499 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
500 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
501 putfh->pf_fhlen);
68d93184 502 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
1da177e4
LT		 503}
504
7191155b 505static __be32
b591480b
BF		 506nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
507 void *arg)
1da177e4 508{
b37ad28b 509 __be32 status;
1da177e4 510
ca364317 511 fh_put(&cstate->current_fh);
df547efb 512 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 513 return status;
514}
515
7191155b 516static __be32
b591480b
BF		 517nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
518 void *arg)
1da177e4 519{
ca364317 520 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 521 return nfserr_restorefh;
522
ca364317 523 fh_dup2(&cstate->current_fh, &cstate->save_fh);
37c593c5
TM		 524 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
525 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
526 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
527 }
1da177e4
LT		 528 return nfs_ok;
529}
530
7191155b 531static __be32
b591480b
BF		 532nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
533 void *arg)
1da177e4 534{
ca364317 535 if (!cstate->current_fh.fh_dentry)
1da177e4
LT		 536 return nfserr_nofilehandle;
537
ca364317 538 fh_dup2(&cstate->save_fh, &cstate->current_fh);
37c593c5
TM		 539 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) {
540 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
541 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG);
542 }
1da177e4
LT		 543 return nfs_ok;
544}
545
546/*
547 * misc nfsv4 ops
548 */
7191155b 549static __be32
ca364317
BF		 550nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
551 struct nfsd4_access *access)
1da177e4
LT		 552{
553 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
554 return nfserr_inval;
555
556 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 557 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
558 &access->ac_supported);
1da177e4
LT		 559}
560
b9c0ef85 561static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1
CL		 562{
563 __be32 verf[2];
b9c0ef85 564 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
ab4684d1 565
f419992c
JL		 566 /*
567 * This is opaque to client, so no need to byte-swap. Use
568 * __force to keep sparse happy
569 */
570 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
571 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec;
ab4684d1
CL		 572 memcpy(verifier->data, verf, sizeof(verifier->data));
573}
574
7191155b 575static __be32
ca364317
BF		 576nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
577 struct nfsd4_commit *commit)
1da177e4 578{
b9c0ef85 579 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
75c096f7 580 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
ca364317 581 commit->co_count);
1da177e4
LT		 582}
583
b37ad28b 584static __be32
ca364317
BF		 585nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
586 struct nfsd4_create *create)
1da177e4
LT		 587{
588 struct svc_fh resfh;
b37ad28b 589 __be32 status;
1da177e4
LT		 590 dev_t rdev;
591
592 fh_init(&resfh, NFS4_FHSIZE);
593
fa08139d 594 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 595 if (status)
596 return status;
597
3c8e0316
YZ		 598 status = check_attr_support(rqstp, cstate, create->cr_bmval,
599 nfsd_attrmask);
600 if (status)
601 return status;
602
1da177e4
LT		 603 switch (create->cr_type) {
604 case NF4LNK:
ca364317
BF		 605 status = nfsd_symlink(rqstp, &cstate->current_fh,
606 create->cr_name, create->cr_namelen,
1e444f5b 607 create->cr_data, &resfh);
1da177e4
LT		 608 break;
609
610 case NF4BLK:
611 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
612 if (MAJOR(rdev) != create->cr_specdata1 ||
613 MINOR(rdev) != create->cr_specdata2)
614 return nfserr_inval;
ca364317
BF		 615 status = nfsd_create(rqstp, &cstate->current_fh,
616 create->cr_name, create->cr_namelen,
617 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 618 break;
619
620 case NF4CHR:
621 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
622 if (MAJOR(rdev) != create->cr_specdata1 ||
623 MINOR(rdev) != create->cr_specdata2)
624 return nfserr_inval;
ca364317
BF		 625 status = nfsd_create(rqstp, &cstate->current_fh,
626 create->cr_name, create->cr_namelen,
627 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 628 break;
629
630 case NF4SOCK:
ca364317
BF		 631 status = nfsd_create(rqstp, &cstate->current_fh,
632 create->cr_name, create->cr_namelen,
633 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 634 break;
635
636 case NF4FIFO:
ca364317
BF		 637 status = nfsd_create(rqstp, &cstate->current_fh,
638 create->cr_name, create->cr_namelen,
639 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 640 break;
641
642 case NF4DIR:
643 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 644 status = nfsd_create(rqstp, &cstate->current_fh,
645 create->cr_name, create->cr_namelen,
646 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 647 break;
648
649 default:
650 status = nfserr_badtype;
651 }
652
9208faf2
YZ		 653 if (status)
654 goto out;
1da177e4 655
18032ca0
DQ		 656 if (create->cr_label.len)
657 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
658
9208faf2
YZ		 659 if (create->cr_acl != NULL)
660 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
661 create->cr_bmval);
662
663 fh_unlock(&cstate->current_fh);
664 set_change_info(&create->cr_cinfo, &cstate->current_fh);
665 fh_dup2(&cstate->current_fh, &resfh);
666out:
1da177e4
LT		 667 fh_put(&resfh);
668 return status;
669}
670
7191155b 671static __be32
ca364317
BF		 672nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
673 struct nfsd4_getattr *getattr)
1da177e4 674{
b37ad28b 675 __be32 status;
1da177e4 676
8837abca 677 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 678 if (status)
679 return status;
680
681 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
682 return nfserr_inval;
683
916d2d84
BF		 684 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
685 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
686 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 687
ca364317 688 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 689 return nfs_ok;
690}
691
7191155b 692static __be32
ca364317
BF		 693nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
694 struct nfsd4_link *link)
1da177e4 695{
b37ad28b 696 __be32 status = nfserr_nofilehandle;
1da177e4 697
ca364317 698 if (!cstate->save_fh.fh_dentry)
1da177e4 699 return status;
ca364317
BF		 700 status = nfsd_link(rqstp, &cstate->current_fh,
701 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 702 if (!status)
ca364317 703 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 704 return status;
705}
706
0ff7ab46 707static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 708{
709 struct svc_fh tmp_fh;
b37ad28b 710 __be32 ret;
1da177e4
LT		 711
712 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 713 ret = exp_pseudoroot(rqstp, &tmp_fh);
714 if (ret)
1da177e4 715 return ret;
0ff7ab46 716 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 717 fh_put(&tmp_fh);
718 return nfserr_noent;
719 }
720 fh_put(&tmp_fh);
0ff7ab46
BF		 721 return nfsd_lookup(rqstp, fh, "..", 2, fh);
722}
723
724static __be32
725nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
726 void *arg)
727{
728 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 729}
730
7191155b 731static __be32
ca364317
BF		 732nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
733 struct nfsd4_lookup *lookup)
1da177e4 734{
ca364317
BF		 735 return nfsd_lookup(rqstp, &cstate->current_fh,
736 lookup->lo_name, lookup->lo_len,
737 &cstate->current_fh);
1da177e4
LT		 738}
739
7191155b 740static __be32
ca364317
BF		 741nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
742 struct nfsd4_read *read)
1da177e4 743{
b37ad28b 744 __be32 status;
1da177e4 745
7e06b7f9 746 read->rd_filp = NULL;
1da177e4
LT		 747 if (read->rd_offset >= OFFSET_MAX)
748 return nfserr_inval;
749
9b3234b9
BF		 750 /*
751 * If we do a zero copy read, then a client will see read data
752 * that reflects the state of the file *after* performing the
753 * following compound.
754 *
755 * To ensure proper ordering, we therefore turn off zero copy if
756 * the client wants us to do more in this compound:
757 */
758 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 759 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 760
1da177e4 761 /* check stateid */
aa0d6aed
AS		 762 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
763 &read->rd_stateid, RD_STATE,
764 &read->rd_filp, &read->rd_tmp_file);
af90f707 765 if (status) {
1da177e4
LT		 766 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
767 goto out;
768 }
769 status = nfs_ok;
770out:
1da177e4 771 read->rd_rqstp = rqstp;
ca364317 772 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 773 return status;
774}
775
7191155b 776static __be32
ca364317
BF		 777nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
778 struct nfsd4_readdir *readdir)
1da177e4
LT		 779{
780 u64 cookie = readdir->rd_cookie;
781 static const nfs4_verifier zeroverf;
782
783 /* no need to check permission - this will be done in nfsd_readdir() */
784
785 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
786 return nfserr_inval;
787
916d2d84
BF		 788 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
789 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
790 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 791
832023bf 792 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 793 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
794 return nfserr_bad_cookie;
795
796 readdir->rd_rqstp = rqstp;
ca364317 797 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 798 return nfs_ok;
799}
800
7191155b 801static __be32
ca364317
BF		 802nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
803 struct nfsd4_readlink *readlink)
1da177e4
LT		 804{
805 readlink->rl_rqstp = rqstp;
ca364317 806 readlink->rl_fhp = &cstate->current_fh;
1da177e4
LT		 807 return nfs_ok;
808}
809
7191155b 810static __be32
ca364317
BF		 811nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
812 struct nfsd4_remove *remove)
1da177e4 813{
b37ad28b 814 __be32 status;
1da177e4 815
c87fb4a3 816 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 817 return nfserr_grace;
ca364317
BF		 818 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
819 remove->rm_name, remove->rm_namelen);
1da177e4 820 if (!status) {
ca364317
BF		 821 fh_unlock(&cstate->current_fh);
822 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 823 }
824 return status;
825}
826
7191155b 827static __be32
ca364317
BF		 828nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
829 struct nfsd4_rename *rename)
1da177e4 830{
b37ad28b 831 __be32 status = nfserr_nofilehandle;
1da177e4 832
ca364317 833 if (!cstate->save_fh.fh_dentry)
1da177e4 834 return status;
c87fb4a3 835 if (opens_in_grace(SVC_NET(rqstp)) &&
5ccb0066 836 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
c815afc7 837 return nfserr_grace;
ca364317
BF		 838 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
839 rename->rn_snamelen, &cstate->current_fh,
1da177e4 840 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 841 if (status)
842 return status;
843 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
844 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
845 return nfs_ok;
1da177e4
LT		 846}
847
dcb488a3
AA		 848static __be32
849nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
850 struct nfsd4_secinfo *secinfo)
851{
dcb488a3
AA		 852 struct svc_export *exp;
853 struct dentry *dentry;
854 __be32 err;
855
29a78a3e
BF		 856 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
857 if (err)
858 return err;
dcb488a3
AA		 859 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
860 secinfo->si_name, secinfo->si_namelen,
861 &exp, &dentry);
862 if (err)
863 return err;
2f6fc056 864 fh_unlock(&cstate->current_fh);
2b0143b5 865 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 866 exp_put(exp);
867 err = nfserr_noent;
868 } else
869 secinfo->si_exp = exp;
870 dput(dentry);
56560b9a
BF		 871 if (cstate->minorversion)
872 /* See rfc 5661 section 2.6.3.1.1.8 */
873 fh_put(&cstate->current_fh);
dcb488a3
AA		 874 return err;
875}
876
04f4ad16
BF		 877static __be32
878nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
879 struct nfsd4_secinfo_no_name *sin)
880{
881 __be32 err;
882
883 switch (sin->sin_style) {
884 case NFS4_SECINFO_STYLE4_CURRENT_FH:
885 break;
886 case NFS4_SECINFO_STYLE4_PARENT:
887 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
888 if (err)
889 return err;
890 break;
891 default:
892 return nfserr_inval;
893 }
bf18f163
KM		 894
895 sin->sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 896 fh_put(&cstate->current_fh);
897 return nfs_ok;
898}
899
7191155b 900static __be32
ca364317
BF		 901nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
902 struct nfsd4_setattr *setattr)
1da177e4 903{
b37ad28b 904 __be32 status = nfs_ok;
96f6f985 905 int err;
1da177e4 906
1da177e4 907 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 908 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed
AS		 909 &cstate->current_fh, &setattr->sa_stateid,
910 WR_STATE, NULL, NULL);
375c5547 911 if (status) {
3e3b4800 912 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 913 return status;
914 }
1da177e4 915 }
96f6f985
AV		 916 err = fh_want_write(&cstate->current_fh);
917 if (err)
918 return nfserrno(err);
1da177e4 919 status = nfs_ok;
3c8e0316
YZ		 920
921 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
922 nfsd_attrmask);
923 if (status)
924 goto out;
925
1da177e4 926 if (setattr->sa_acl != NULL)
ca364317
BF		 927 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
928 setattr->sa_acl);
1da177e4 929 if (status)
18f335af 930 goto out;
18032ca0
DQ		 931 if (setattr->sa_label.len)
932 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
933 &setattr->sa_label);
934 if (status)
935 goto out;
ca364317 936 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 937 0, (time_t)0);
18f335af 938out:
bad0dcff 939 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 940 return status;
941}
942
ffe1137b
BF		 943static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
944{
945 int i = 1;
946 int buflen = write->wr_buflen;
947
948 vec[0].iov_base = write->wr_head.iov_base;
949 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
950 buflen -= vec[0].iov_len;
951
952 while (buflen) {
953 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
954 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
955 buflen -= vec[i].iov_len;
956 i++;
957 }
958 return i;
959}
960
7191155b 961static __be32
ca364317
BF		 962nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
963 struct nfsd4_write *write)
1da177e4
LT		 964{
965 stateid_t *stateid = &write->wr_stateid;
966 struct file *filp = NULL;
b37ad28b 967 __be32 status = nfs_ok;
31dec253 968 unsigned long cnt;
ffe1137b 969 int nvecs;
1da177e4 970
1da177e4
LT		 971 if (write->wr_offset >= OFFSET_MAX)
972 return nfserr_inval;
973
aa0d6aed
AS		 974 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
975 stateid, WR_STATE, &filp, NULL);
375c5547
BF		 976 if (status) {
977 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
978 return status;
979 }
980
31dec253 981 cnt = write->wr_buflen;
1da177e4 982 write->wr_how_written = write->wr_stable_how;
b9c0ef85 983 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 984
ffe1137b
BF		 985 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
986 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
987
af90f707
CH		 988 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
989 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 990 write->wr_how_written);
af90f707 991 fput(filp);
1da177e4 992
31dec253
DS		 993 write->wr_bytes_written = cnt;
994
1da177e4 995 return status;
1da177e4
LT		 996}
997
ffa0160a 998static __be32
29ae7f9d
AS		 999nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1000 stateid_t *src_stateid, struct file **src,
1001 stateid_t *dst_stateid, struct file **dst)
ffa0160a 1002{
ffa0160a
CH		 1003 __be32 status;
1004
1005 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
29ae7f9d 1006 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1007 if (status) {
1008 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1009 goto out;
1010 }
1011
1012 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
29ae7f9d 1013 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1014 if (status) {
1015 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1016 goto out_put_src;
1017 }
1018
1019 /* fix up for NFS-specific error code */
29ae7f9d
AS		 1020 if (!S_ISREG(file_inode(*src)->i_mode) ||
1021 !S_ISREG(file_inode(*dst)->i_mode)) {
ffa0160a
CH		 1022 status = nfserr_wrong_type;
1023 goto out_put_dst;
1024 }
1025
29ae7f9d
AS		 1026out:
1027 return status;
1028out_put_dst:
1029 fput(*dst);
1030out_put_src:
1031 fput(*src);
1032 goto out;
1033}
1034
1035static __be32
1036nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1037 struct nfsd4_clone *clone)
1038{
1039 struct file *src, *dst;
1040 __be32 status;
1041
1042 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1043 &clone->cl_dst_stateid, &dst);
1044 if (status)
1045 goto out;
1046
ffa0160a
CH		 1047 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1048 dst, clone->cl_dst_pos, clone->cl_count);
1049
ffa0160a 1050 fput(dst);
ffa0160a
CH		 1051 fput(src);
1052out:
1053 return status;
1054}
1055
29ae7f9d
AS		 1056static __be32
1057nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1058 struct nfsd4_copy *copy)
1059{
1060 struct file *src, *dst;
1061 __be32 status;
1062 ssize_t bytes;
1063
1064 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1065 &copy->cp_dst_stateid, &dst);
1066 if (status)
1067 goto out;
1068
1069 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1070 dst, copy->cp_dst_pos, copy->cp_count);
1071
1072 if (bytes < 0)
1073 status = nfserrno(bytes);
1074 else {
1075 copy->cp_res.wr_bytes_written = bytes;
1076 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1077 copy->cp_consecutive = 1;
1078 copy->cp_synchronous = 1;
1079 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1080 status = nfs_ok;
1081 }
1082
1083 fput(src);
1084 fput(dst);
1085out:
1086 return status;
1087}
1088
95d871f0
AS		 1089static __be32
1090nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1091 struct nfsd4_fallocate *fallocate, int flags)
1092{
1093 __be32 status = nfserr_notsupp;
1094 struct file *file;
1095
aa0d6aed 1096 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1097 &fallocate->falloc_stateid,
af90f707 1098 WR_STATE, &file, NULL);
95d871f0
AS		 1099 if (status != nfs_ok) {
1100 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1101 return status;
1102 }
1103
1104 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1105 fallocate->falloc_offset,
1106 fallocate->falloc_length,
1107 flags);
1108 fput(file);
1109 return status;
1110}
1111
1112static __be32
1113nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1114 struct nfsd4_fallocate *fallocate)
1115{
1116 return nfsd4_fallocate(rqstp, cstate, fallocate, 0);
1117}
1118
b0cb9085
AS		 1119static __be32
1120nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1121 struct nfsd4_fallocate *fallocate)
1122{
1123 return nfsd4_fallocate(rqstp, cstate, fallocate,
1124 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1125}
1126
24bab491
AS		 1127static __be32
1128nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1129 struct nfsd4_seek *seek)
1130{
1131 int whence;
1132 __be32 status;
1133 struct file *file;
1134
aa0d6aed 1135 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1136 &seek->seek_stateid,
af90f707 1137 RD_STATE, &file, NULL);
24bab491
AS		 1138 if (status) {
1139 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1140 return status;
1141 }
1142
1143 switch (seek->seek_whence) {
1144 case NFS4_CONTENT_DATA:
1145 whence = SEEK_DATA;
1146 break;
1147 case NFS4_CONTENT_HOLE:
1148 whence = SEEK_HOLE;
1149 break;
1150 default:
1151 status = nfserr_union_notsupp;
1152 goto out;
1153 }
1154
1155 /*
1156 * Note: This call does change file->f_pos, but nothing in NFSD
1157 * should ever file->f_pos.
1158 */
1159 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1160 if (seek->seek_pos < 0)
1161 status = nfserrno(seek->seek_pos);
1162 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1163 seek->seek_eof = true;
1164
1165out:
1166 fput(file);
1167 return status;
1168}
1169
1da177e4
LT		 1170/* This routine never returns NFS_OK! If there are no other errors, it
1171 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1172 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1173 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1174 */
b37ad28b 1175static __be32
c954e2a5 1176_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1177 struct nfsd4_verify *verify)
1da177e4 1178{
2ebbc012 1179 __be32 *buf, *p;
1da177e4 1180 int count;
b37ad28b 1181 __be32 status;
1da177e4 1182
8837abca 1183 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1184 if (status)
1185 return status;
1186
3c8e0316
YZ		 1187 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1188 if (status)
1189 return status;
1190
1da177e4
LT		 1191 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1192 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1193 return nfserr_inval;
1194 if (verify->ve_attrlen & 3)
1195 return nfserr_inval;
1196
1197 /* count in words:
1198 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1199 */
1200 count = 4 + (verify->ve_attrlen >> 2);
1201 buf = kmalloc(count << 2, GFP_KERNEL);
1202 if (!buf)
3e772463 1203 return nfserr_jukebox;
1da177e4 1204
84822d0b 1205 p = buf;
d5184658 1206 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1207 cstate->current_fh.fh_export,
d5184658
BF		 1208 cstate->current_fh.fh_dentry,
1209 verify->ve_bmval,
406a7ea9 1210 rqstp, 0);
41ae6e71
BF		 1211 /*
1212 * If nfsd4_encode_fattr() ran out of space, assume that's because
1213 * the attributes are longer (hence different) than those given:
1214 */
84822d0b 1215 if (status == nfserr_resource)
1da177e4
LT		 1216 status = nfserr_not_same;
1217 if (status)
1218 goto out_kfree;
1219
95ec28cd
BH		 1220 /* skip bitmap */
1221 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1222 status = nfserr_not_same;
1223 if (ntohl(*p++) != verify->ve_attrlen)
1224 goto out_kfree;
1225 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1226 status = nfserr_same;
1227
1228out_kfree:
1229 kfree(buf);
1230 return status;
1231}
1232
c954e2a5
BF		 1233static __be32
1234nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1235 struct nfsd4_verify *verify)
1236{
1237 __be32 status;
1238
1239 status = _nfsd4_verify(rqstp, cstate, verify);
1240 return status == nfserr_not_same ? nfs_ok : status;
1241}
1242
1243static __be32
1244nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1245 struct nfsd4_verify *verify)
1246{
1247 __be32 status;
1248
1249 status = _nfsd4_verify(rqstp, cstate, verify);
1250 return status == nfserr_same ? nfs_ok : status;
1251}
1252
9cf514cc
CH		 1253#ifdef CONFIG_NFSD_PNFS
1254static const struct nfsd4_layout_ops *
1255nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1256{
8a4c3926 1257 if (!exp->ex_layout_types) {
9cf514cc
CH		 1258 dprintk("%s: export does not support pNFS\n", __func__);
1259 return NULL;
1260 }
1261
b550a32e
AK		 1262 if (layout_type >= LAYOUT_TYPE_MAX ||
1263 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1264 dprintk("%s: layout type %d not supported\n",
1265 __func__, layout_type);
1266 return NULL;
1267 }
1268
1269 return nfsd4_layout_ops[layout_type];
1270}
1271
1272static __be32
1273nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
1274 struct nfsd4_compound_state *cstate,
1275 struct nfsd4_getdeviceinfo *gdp)
1276{
1277 const struct nfsd4_layout_ops *ops;
1278 struct nfsd4_deviceid_map *map;
1279 struct svc_export *exp;
1280 __be32 nfserr;
1281
1282 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1283 __func__,
1284 gdp->gd_layout_type,
1285 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1286 gdp->gd_maxcount);
1287
1288 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1289 if (!map) {
1290 dprintk("%s: couldn't find device ID to export mapping!\n",
1291 __func__);
1292 return nfserr_noent;
1293 }
1294
1295 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1296 if (IS_ERR(exp)) {
1297 dprintk("%s: could not find device id\n", __func__);
1298 return nfserr_noent;
1299 }
1300
1301 nfserr = nfserr_layoutunavailable;
1302 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1303 if (!ops)
1304 goto out;
1305
1306 nfserr = nfs_ok;
f99d4fbd
CH		 1307 if (gdp->gd_maxcount != 0) {
1308 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1309 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1310 }
9cf514cc
CH		 1311
1312 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1313out:
a1420384 1314 exp_put(exp);
9cf514cc
CH		 1315 return nfserr;
1316}
1317
1318static __be32
1319nfsd4_layoutget(struct svc_rqst *rqstp,
1320 struct nfsd4_compound_state *cstate,
1321 struct nfsd4_layoutget *lgp)
1322{
1323 struct svc_fh *current_fh = &cstate->current_fh;
1324 const struct nfsd4_layout_ops *ops;
1325 struct nfs4_layout_stateid *ls;
1326 __be32 nfserr;
1327 int accmode;
1328
1329 switch (lgp->lg_seg.iomode) {
1330 case IOMODE_READ:
1331 accmode = NFSD_MAY_READ;
1332 break;
1333 case IOMODE_RW:
1334 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE;
1335 break;
1336 default:
1337 dprintk("%s: invalid iomode %d\n",
1338 __func__, lgp->lg_seg.iomode);
1339 nfserr = nfserr_badiomode;
1340 goto out;
1341 }
1342
1343 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1344 if (nfserr)
1345 goto out;
1346
1347 nfserr = nfserr_layoutunavailable;
1348 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1349 if (!ops)
1350 goto out;
1351
1352 /*
1353 * Verify minlength and range as per RFC5661:
1354 * o If loga_length is less than loga_minlength,
1355 * the metadata server MUST return NFS4ERR_INVAL.
1356 * o If the sum of loga_offset and loga_minlength exceeds
1357 * NFS4_UINT64_MAX, and loga_minlength is not
1358 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1359 * o If the sum of loga_offset and loga_length exceeds
1360 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1361 * the error NFS4ERR_INVAL MUST result.
1362 */
1363 nfserr = nfserr_inval;
1364 if (lgp->lg_seg.length < lgp->lg_minlength ||
1365 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1366 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1367 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1368 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1369 goto out;
1370 if (lgp->lg_seg.length == 0)
1371 goto out;
1372
1373 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1374 true, lgp->lg_layout_type, &ls);
31ef83dc
CH		 1375 if (nfserr) {
1376 trace_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1377 goto out;
31ef83dc 1378 }
9cf514cc 1379
c5c707f9
CH		 1380 nfserr = nfserr_recallconflict;
1381 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1382 goto out_put_stid;
1383
2b0143b5 1384 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1385 current_fh, lgp);
1386 if (nfserr)
1387 goto out_put_stid;
1388
1389 nfserr = nfsd4_insert_layout(lgp, ls);
1390
1391out_put_stid:
cc8a5532 1392 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1393 nfs4_put_stid(&ls->ls_stid);
1394out:
1395 return nfserr;
1396}
1397
1398static __be32
1399nfsd4_layoutcommit(struct svc_rqst *rqstp,
1400 struct nfsd4_compound_state *cstate,
1401 struct nfsd4_layoutcommit *lcp)
1402{
1403 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1404 struct svc_fh *current_fh = &cstate->current_fh;
1405 const struct nfsd4_layout_ops *ops;
1406 loff_t new_size = lcp->lc_last_wr + 1;
1407 struct inode *inode;
1408 struct nfs4_layout_stateid *ls;
1409 __be32 nfserr;
1410
1411 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1412 if (nfserr)
1413 goto out;
1414
1415 nfserr = nfserr_layoutunavailable;
1416 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1417 if (!ops)
1418 goto out;
2b0143b5 1419 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1420
1421 nfserr = nfserr_inval;
1422 if (new_size <= seg->offset) {
1423 dprintk("pnfsd: last write before layout segment\n");
1424 goto out;
1425 }
1426 if (new_size > seg->offset + seg->length) {
1427 dprintk("pnfsd: last write beyond layout segment\n");
1428 goto out;
1429 }
1430 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1431 dprintk("pnfsd: layoutcommit beyond EOF\n");
1432 goto out;
1433 }
1434
1435 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1436 false, lcp->lc_layout_type,
1437 &ls);
1438 if (nfserr) {
31ef83dc 1439 trace_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1440 /* fixup error code as per RFC5661 */
1441 if (nfserr == nfserr_bad_stateid)
1442 nfserr = nfserr_badlayout;
1443 goto out;
1444 }
1445
cc8a5532
JL		 1446 /* LAYOUTCOMMIT does not require any serialization */
1447 mutex_unlock(&ls->ls_mutex);
1448
9cf514cc
CH		 1449 if (new_size > i_size_read(inode)) {
1450 lcp->lc_size_chg = 1;
1451 lcp->lc_newsize = new_size;
1452 } else {
1453 lcp->lc_size_chg = 0;
1454 }
1455
d8398fc1 1456 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1457 nfs4_put_stid(&ls->ls_stid);
1458out:
1459 return nfserr;
1460}
1461
1462static __be32
1463nfsd4_layoutreturn(struct svc_rqst *rqstp,
1464 struct nfsd4_compound_state *cstate,
1465 struct nfsd4_layoutreturn *lrp)
1466{
1467 struct svc_fh *current_fh = &cstate->current_fh;
1468 __be32 nfserr;
1469
1470 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1471 if (nfserr)
1472 goto out;
1473
1474 nfserr = nfserr_layoutunavailable;
1475 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1476 goto out;
1477
1478 switch (lrp->lr_seg.iomode) {
1479 case IOMODE_READ:
1480 case IOMODE_RW:
1481 case IOMODE_ANY:
1482 break;
1483 default:
1484 dprintk("%s: invalid iomode %d\n", __func__,
1485 lrp->lr_seg.iomode);
1486 nfserr = nfserr_inval;
1487 goto out;
1488 }
1489
1490 switch (lrp->lr_return_type) {
1491 case RETURN_FILE:
1492 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1493 break;
1494 case RETURN_FSID:
1495 case RETURN_ALL:
1496 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1497 break;
1498 default:
1499 dprintk("%s: invalid return_type %d\n", __func__,
1500 lrp->lr_return_type);
1501 nfserr = nfserr_inval;
1502 break;
1503 }
1504out:
1505 return nfserr;
1506}
1507#endif /* CONFIG_NFSD_PNFS */
1508
1da177e4
LT		 1509/*
1510 * NULL call.
1511 */
7111c66e 1512static __be32
a6beb732 1513nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 1514{
1515 return nfs_ok;
1516}
1517
e2b20950
SA		 1518static inline void nfsd4_increment_op_stats(u32 opnum)
1519{
1520 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1521 nfsdstats.nfs4_opcount[opnum]++;
1522}
1523
b591480b
BF		 1524typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *,
1525 void *);
58e7b33a 1526typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op);
a6beb732 1527
8b70484c
TM		 1528typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *);
1529typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *);
58e7b33a 1530
f9bb94c4
AA		 1531enum nfsd4_op_flags {
1532 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */
5ece3caf
MJ		 1533 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */
1534 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */
68d93184
BF		 1535 /* For rfc 5661 section 2.6.3.1.1: */
1536 OP_HANDLES_WRONGSEC = 1 << 3,
1537 OP_IS_PUTFH_LIKE = 1 << 4,
1091006c 1538 /*
c856694e
BF		 1539 * These are the ops whose result size we estimate before
1540 * encoding, to avoid performing an op then not being able to
1541 * respond or cache a response. This includes writes and setattrs
1542 * as well as the operations usually called "nonidempotent":
1543 */
1544 OP_MODIFIES_SOMETHING = 1 << 5,
1545 /*
1546 * Cache compounds containing these ops in the xid-based drc:
1091006c
BF		 1547 * We use the DRC for compounds containing non-idempotent
1548 * operations, *except* those that are 4.1-specific (since
1549 * sessions provide their own EOS), and except for stateful
1550 * operations other than setclientid and setclientid_confirm
1551 * (since sequence numbers provide EOS for open, lock, etc in
1552 * the v4.0 case).
1553 */
c856694e 1554 OP_CACHEME = 1 << 6,
8b70484c
TM		 1555 /*
1556 * These are ops which clear current state id.
1557 */
1558 OP_CLEAR_STATEID = 1 << 7,
c856694e
BF		 1559};
1560
1561struct nfsd4_operation {
1562 nfsd4op_func op_func;
1563 u32 op_flags;
1564 char *op_name;
58e7b33a
MJ		 1565 /* Try to get response size before operation */
1566 nfsd4op_rsize op_rsize_bop;
24ff99c6
BS		 1567 stateid_getter op_get_currentstateid;
1568 stateid_setter op_set_currentstateid;
b591480b
BF		 1569};
1570
1571static struct nfsd4_operation nfsd4_ops[];
1572
f1c7f79b 1573static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1574
f9bb94c4 1575/*
57716355 1576 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1577 *
57716355
BF		 1578 * Also note, enforced elsewhere:
1579 * - SEQUENCE other than as first op results in
1580 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1581 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1582 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1583 * - DESTROY_SESSION must be the final operation in a compound, if
1584 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1585 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1586 */
57716355 1587static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1588{
57716355
BF		 1589 struct nfsd4_op *op = &args->ops[0];
1590
1591 /* These ordering requirements don't apply to NFSv4.0: */
1592 if (args->minorversion == 0)
1593 return nfs_ok;
1594 /* This is weird, but OK, not our problem: */
1595 if (args->opcnt == 0)
1596 return nfs_ok;
1597 if (op->status == nfserr_op_illegal)
1598 return nfs_ok;
1599 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1600 return nfserr_op_not_in_session;
1601 if (op->opnum == OP_SEQUENCE)
1602 return nfs_ok;
1603 if (args->opcnt != 1)
1604 return nfserr_not_only_op;
1605 return nfs_ok;
f9bb94c4
AA		 1606}
1607
22b03214
BF		 1608static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
1609{
1610 return &nfsd4_ops[op->opnum];
1611}
1612
1091006c
BF		 1613bool nfsd4_cache_this_op(struct nfsd4_op *op)
1614{
e372ba60
BF		 1615 if (op->opnum == OP_ILLEGAL)
1616 return false;
c856694e 1617 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1618}
1619
68d93184
BF		 1620static bool need_wrongsec_check(struct svc_rqst *rqstp)
1621{
1622 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1623 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1624 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1625 struct nfsd4_op *next = &argp->ops[resp->opcnt];
1626 struct nfsd4_operation *thisd;
1627 struct nfsd4_operation *nextd;
1628
1629 thisd = OPDESC(this);
1630 /*
1631 * Most ops check wronsec on our own; only the putfh-like ops
1632 * have special rules.
1633 */
1634 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1635 return false;
1636 /*
1637 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1638 * put-filehandle operation if we're not going to use the
1639 * result:
1640 */
1641 if (argp->opcnt == resp->opcnt)
1642 return false;
51904b08
BF		 1643 if (next->opnum == OP_ILLEGAL)
1644 return false;
68d93184
BF		 1645 nextd = OPDESC(next);
1646 /*
1647 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1648 * errors themselves as necessary; others should check for them
1649 * now:
1650 */
1651 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1652}
1653
2d124dfa
BF		 1654static void svcxdr_init_encode(struct svc_rqst *rqstp,
1655 struct nfsd4_compoundres *resp)
1656{
1657 struct xdr_stream *xdr = &resp->xdr;
1658 struct xdr_buf *buf = &rqstp->rq_res;
1659 struct kvec *head = buf->head;
1660
1661 xdr->buf = buf;
ddd1ea56 1662 xdr->iov = head;
2d124dfa 1663 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1664 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1665 /* Tail and page_len should be zero at this point: */
1666 buf->len = buf->head[0].iov_len;
2825a7f9 1667 xdr->scratch.iov_len = 0;
05638dc7 1668 xdr->page_ptr = buf->pages - 1;
2825a7f9 1669 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1670 - rqstp->rq_auth_slack;
2d124dfa
BF		 1671}
1672
1da177e4
LT		 1673/*
1674 * COMPOUND call.
1675 */
7111c66e 1676static __be32
a6beb732 1677nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 1678{
a6beb732
CH		 1679 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1680 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 1681 struct nfsd4_op *op;
b591480b 1682 struct nfsd4_operation *opdesc;
e354d571 1683 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1684 struct svc_fh *current_fh = &cstate->current_fh;
1685 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1686 __be32 status;
1da177e4 1687
2d124dfa 1688 svcxdr_init_encode(rqstp, resp);
4aea24b2 1689 resp->tagp = resp->xdr.p;
1da177e4 1690 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1691 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1692 resp->taglen = args->taglen;
1693 resp->tag = args->tag;
1da177e4 1694 resp->rqstp = rqstp;
4daeed25 1695 cstate->minorversion = args->minorversion;
4daeed25
KM		 1696 fh_init(current_fh, NFS4_FHSIZE);
1697 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1698 /*
1699 * Don't use the deferral mechanism for NFSv4; compounds make it
1700 * too hard to avoid non-idempotency problems.
1701 */
30660e04 1702 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1703
1704 /*
1705 * According to RFC3010, this takes precedence over all other errors.
1706 */
1707 status = nfserr_minor_vers_mismatch;
35f7a14f 1708 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4
LT		 1709 goto out;
1710
57716355
BF		 1711 status = nfs41_check_op_ordering(args);
1712 if (status) {
f9bb94c4 1713 op = &args->ops[0];
57716355 1714 op->status = status;
f9bb94c4
AA		 1715 goto encode_op;
1716 }
1717
1da177e4
LT		 1718 while (!status && resp->opcnt < args->opcnt) {
1719 op = &args->ops[resp->opcnt++];
1720
b001a1b6
BH		 1721 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n",
1722 resp->opcnt, args->opcnt, op->opnum,
1723 nfsd4_op_name(op->opnum));
1da177e4
LT		 1724 /*
1725 * The XDR decode routines may have pre-set op->status;
1726 * for example, if there is a miscellaneous XDR error
1727 * it will be set to nfserr_bad_xdr.
1728 */
9d313b17
BF		 1729 if (op->status) {
1730 if (op->opnum == OP_OPEN)
1731 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1732 goto encode_op;
9d313b17 1733 }
1da177e4 1734
22b03214 1735 opdesc = OPDESC(op);
b591480b 1736
4daeed25 1737 if (!current_fh->fh_dentry) {
27d630ec 1738 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1739 op->status = nfserr_nofilehandle;
1740 goto encode_op;
1741 }
4daeed25 1742 } else if (current_fh->fh_export->ex_fslocs.migrated &&
eeac294e 1743 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1744 op->status = nfserr_moved;
1da177e4
LT		 1745 goto encode_op;
1746 }
b591480b 1747
2336745e
KM		 1748 fh_clear_wcc(current_fh);
1749
58e7b33a
MJ		 1750 /* If op is non-idempotent */
1751 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1752 /*
a8095f7e
BF		 1753 * Don't execute this op if we couldn't encode a
1754 * succesful reply:
1755 */
1756 u32 plen = opdesc->op_rsize_bop(rqstp, op);
1757 /*
1758 * Plus if there's another operation, make sure
4c69d585
BF		 1759 * we'll have space to at least encode an error:
1760 */
1761 if (resp->opcnt < args->opcnt)
1762 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1763 op->status = nfsd4_check_resp_size(resp, plen);
1764 }
1765
1766 if (op->status)
1767 goto encode_op;
1768
b600de7a
BF		 1769 if (opdesc->op_get_currentstateid)
1770 opdesc->op_get_currentstateid(cstate, &op->u);
1771 op->status = opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1772
8b70484c
TM		 1773 if (!op->status) {
1774 if (opdesc->op_set_currentstateid)
1775 opdesc->op_set_currentstateid(cstate, &op->u);
1776
1777 if (opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1778 clear_current_stateid(cstate);
8b70484c
TM		 1779
1780 if (need_wrongsec_check(rqstp))
4daeed25 1781 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1782 }
68d93184 1783
1da177e4 1784encode_op:
49557cc7 1785 /* Only from SEQUENCE */
4daeed25 1786 if (cstate->status == nfserr_replay_cache) {
da3846a2 1787 dprintk("%s NFS4.1 replay from cache\n", __func__);
abfabf8c 1788 status = op->status;
da3846a2
AA		 1789 goto out;
1790 }
a90b061c 1791 if (op->status == nfserr_replay_me) {
a4f1706a 1792 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1793 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1794 status = op->status = op->replay->rp_status;
1795 } else {
1796 nfsd4_encode_operation(resp, op);
1797 status = op->status;
1798 }
0407717d
BH		 1799
1800 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n",
1801 args->ops, args->opcnt, resp->opcnt, op->opnum,
1802 be32_to_cpu(status));
1803
58fb12e6 1804 nfsd4_cstate_clear_replay(cstate);
e2b20950 1805 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1806 }
1807
4daeed25
KM		 1808 cstate->status = status;
1809 fh_put(current_fh);
1810 fh_put(save_fh);
1811 BUG_ON(cstate->replay_owner);
1da177e4 1812out:
2f425878 1813 /* Reset deferral mechanism for RPC deferrals */
30660e04 1814 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1815 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1816 return status;
1817}
1818
58e7b33a
MJ		 1819#define op_encode_hdr_size (2)
1820#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1821#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1822#define op_encode_change_info_maxsz (5)
1823#define nfs4_fattr_bitmap_maxsz (4)
1824
8c7424cf
BF		 1825/* We'll fall back on returning no lockowner if run out of space: */
1826#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1827#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1828
1829#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1830
1831#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1832#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1833 op_encode_ace_maxsz)
1834
1835#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1836
1837static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1838{
1839 return (op_encode_hdr_size) * sizeof(__be32);
1840}
1841
1842static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1843{
1844 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1845}
1846
2282cd2c
KM		 1847static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1848{
1849 /* ac_supported, ac_resp_access */
1850 return (op_encode_hdr_size + 2)* sizeof(__be32);
1851}
1852
58e7b33a
MJ		 1853static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1854{
1855 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1856}
1857
1858static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1859{
1860 return (op_encode_hdr_size + op_encode_change_info_maxsz
1861 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1862}
1863
b86cef60
BF		 1864/*
1865 * Note since this is an idempotent operation we won't insist on failing
1866 * the op prematurely if the estimate is too large. We may turn off splice
1867 * reads unnecessarily.
1868 */
1869static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1870 struct nfsd4_op *op)
1871{
1872 u32 *bmap = op->u.getattr.ga_bmval;
1873 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1874 u32 ret = 0;
1875
1876 if (bmap0 & FATTR4_WORD0_ACL)
1877 return svc_max_payload(rqstp);
1878 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1879 return svc_max_payload(rqstp);
1880
1881 if (bmap1 & FATTR4_WORD1_OWNER) {
1882 ret += IDMAP_NAMESZ + 4;
1883 bmap1 &= ~FATTR4_WORD1_OWNER;
1884 }
1885 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1886 ret += IDMAP_NAMESZ + 4;
1887 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1888 }
1889 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1890 ret += NFS4_FHSIZE + 4;
1891 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1892 }
1893 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 1894 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 1895 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1896 }
1897 /*
1898 * Largest of remaining attributes are 16 bytes (e.g.,
1899 * supported_attributes)
1900 */
1901 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1902 /* bitmask, length */
1903 ret += 20;
1904 return ret;
1905}
1906
2282cd2c
KM		 1907static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1908{
1909 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1910}
1911
58e7b33a
MJ		 1912static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1913{
1914 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1915 * sizeof(__be32);
1916}
1917
1918static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1919{
1920 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1921 * sizeof(__be32);
1922}
1923
1924static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1925{
1926 return (op_encode_hdr_size + op_encode_stateid_maxsz
1927 + op_encode_change_info_maxsz + 1
1928 + nfs4_fattr_bitmap_maxsz
1929 + op_encode_delegation_maxsz) * sizeof(__be32);
1930}
1931
1932static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1933{
1934 u32 maxcount = 0, rlen = 0;
1935
1936 maxcount = svc_max_payload(rqstp);
3c7aa15d 1937 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1938
622f560e 1939 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1940}
1941
1942static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1943{
3c7aa15d 1944 u32 maxcount = 0, rlen = 0;
58e7b33a 1945
3c7aa15d
KM		 1946 maxcount = svc_max_payload(rqstp);
1947 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1948
561f0ed4
BF		 1949 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1950 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1951}
1952
2282cd2c
KM		 1953static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1954{
1955 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1956}
1957
58e7b33a
MJ		 1958static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1959{
1960 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1961 * sizeof(__be32);
1962}
1963
1964static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1965{
1966 return (op_encode_hdr_size + op_encode_change_info_maxsz
1967 + op_encode_change_info_maxsz) * sizeof(__be32);
1968}
1969
ccae70a9
BF		 1970static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1971 struct nfsd4_op *op)
1972{
d1d84c96
BF		 1973 return (op_encode_hdr_size
1974 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1975}
1976
2282cd2c
KM		 1977static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1978{
1979 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1980 * sizeof(__be32);
1981}
1982
58e7b33a
MJ		 1983static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1984{
1985 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1986}
1987
2282cd2c
KM		 1988static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1989{
1990 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1991 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
1992}
1993
58e7b33a
MJ		 1994static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1995{
480efaee
BF		 1996 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
1997 sizeof(__be32);
58e7b33a
MJ		 1998}
1999
2000static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2001{
f34e432b 2002 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2003}
2004
2005static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2006{
2007 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2008 1 + 1 + /* eir_flags, spr_how */\
2009 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2010 2 + /*eir_server_owner.so_minor_id */\
2011 /* eir_server_owner.so_major_id<> */\
2012 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2013 /* eir_server_scope<> */\
2014 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2015 1 + /* eir_server_impl_id array length */\
2016 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2017}
2018
2019static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2020{
2021 return (op_encode_hdr_size + \
2022 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2023 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2024}
2025
2026static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2027{
2028 return (op_encode_hdr_size + \
2029 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2030 2 + /* csr_sequence, csr_flags */\
2031 op_encode_channel_attrs_maxsz + \
2032 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2033}
2034
29ae7f9d
AS		 2035static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2036{
2037 return (op_encode_hdr_size +
2038 1 /* wr_callback */ +
2039 op_encode_stateid_maxsz /* wr_callback */ +
2040 2 /* wr_count */ +
2041 1 /* wr_committed */ +
2042 op_encode_verifier_maxsz +
2043 1 /* cr_consecutive */ +
2044 1 /* cr_synchronous */) * sizeof(__be32);
2045}
2046
9cf514cc 2047#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2048static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2049{
2050 u32 maxcount = 0, rlen = 0;
2051
2052 maxcount = svc_max_payload(rqstp);
2053 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2054
2055 return (op_encode_hdr_size +
2056 1 /* gd_layout_type*/ +
2057 XDR_QUADLEN(rlen) +
2058 2 /* gd_notify_types */) * sizeof(__be32);
2059}
2060
9cf514cc
CH		 2061/*
2062 * At this stage we don't really know what layout driver will handle the request,
2063 * so we need to define an arbitrary upper bound here.
2064 */
2065#define MAX_LAYOUT_SIZE 128
2066static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2067{
2068 return (op_encode_hdr_size +
2069 1 /* logr_return_on_close */ +
2070 op_encode_stateid_maxsz +
2071 1 /* nr of layouts */ +
2072 MAX_LAYOUT_SIZE) * sizeof(__be32);
2073}
2074
2075static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2076{
2077 return (op_encode_hdr_size +
2078 1 /* locr_newsize */ +
2079 2 /* ns_size */) * sizeof(__be32);
2080}
2081
2082static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2083{
2084 return (op_encode_hdr_size +
2085 1 /* lrs_stateid */ +
2086 op_encode_stateid_maxsz) * sizeof(__be32);
2087}
2088#endif /* CONFIG_NFSD_PNFS */
2089
2282cd2c
KM		 2090
2091static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2092{
2093 return (op_encode_hdr_size + 3) * sizeof(__be32);
2094}
2095
20766016 2096static struct nfsd4_operation nfsd4_ops[] = {
b591480b
BF		 2097 [OP_ACCESS] = {
2098 .op_func = (nfsd4op_func)nfsd4_access,
b001a1b6 2099 .op_name = "OP_ACCESS",
2282cd2c 2100 .op_rsize_bop = (nfsd4op_rsize)nfsd4_access_rsize,
b591480b
BF		 2101 },
2102 [OP_CLOSE] = {
2103 .op_func = (nfsd4op_func)nfsd4_close,
58e7b33a 2104 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2105 .op_name = "OP_CLOSE",
58e7b33a 2106 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
8b70484c
TM		 2107 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid,
2108 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid,
b591480b
BF		 2109 },
2110 [OP_COMMIT] = {
2111 .op_func = (nfsd4op_func)nfsd4_commit,
58e7b33a 2112 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2113 .op_name = "OP_COMMIT",
58e7b33a 2114 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize,
b591480b
BF		 2115 },
2116 [OP_CREATE] = {
2117 .op_func = (nfsd4op_func)nfsd4_create,
d1471053 2118 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2119 .op_name = "OP_CREATE",
58e7b33a 2120 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize,
b591480b
BF		 2121 },
2122 [OP_DELEGRETURN] = {
2123 .op_func = (nfsd4op_func)nfsd4_delegreturn,
58e7b33a 2124 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2125 .op_name = "OP_DELEGRETURN",
58e7b33a 2126 .op_rsize_bop = nfsd4_only_status_rsize,
9428fe1a 2127 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid,
b591480b
BF		 2128 },
2129 [OP_GETATTR] = {
2130 .op_func = (nfsd4op_func)nfsd4_getattr,
eeac294e 2131 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2132 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2133 .op_name = "OP_GETATTR",
b591480b
BF		 2134 },
2135 [OP_GETFH] = {
2136 .op_func = (nfsd4op_func)nfsd4_getfh,
b001a1b6 2137 .op_name = "OP_GETFH",
2282cd2c 2138 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getfh_rsize,
b591480b
BF		 2139 },
2140 [OP_LINK] = {
2141 .op_func = (nfsd4op_func)nfsd4_link,
c856694e
BF		 2142 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2143 | OP_CACHEME,
b001a1b6 2144 .op_name = "OP_LINK",
58e7b33a 2145 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize,
b591480b
BF		 2146 },
2147 [OP_LOCK] = {
2148 .op_func = (nfsd4op_func)nfsd4_lock,
58e7b33a 2149 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2150 .op_name = "OP_LOCK",
58e7b33a 2151 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
62cd4a59 2152 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid,
b591480b
BF		 2153 },
2154 [OP_LOCKT] = {
2155 .op_func = (nfsd4op_func)nfsd4_lockt,
b001a1b6 2156 .op_name = "OP_LOCKT",
2282cd2c 2157 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize,
b591480b
BF		 2158 },
2159 [OP_LOCKU] = {
2160 .op_func = (nfsd4op_func)nfsd4_locku,
58e7b33a 2161 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2162 .op_name = "OP_LOCKU",
58e7b33a 2163 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
62cd4a59 2164 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid,
b591480b
BF		 2165 },
2166 [OP_LOOKUP] = {
2167 .op_func = (nfsd4op_func)nfsd4_lookup,
d1471053 2168 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2169 .op_name = "OP_LOOKUP",
2282cd2c 2170 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2171 },
2172 [OP_LOOKUPP] = {
2173 .op_func = (nfsd4op_func)nfsd4_lookupp,
d1471053 2174 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2175 .op_name = "OP_LOOKUPP",
2282cd2c 2176 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2177 },
2178 [OP_NVERIFY] = {
2179 .op_func = (nfsd4op_func)nfsd4_nverify,
b001a1b6 2180 .op_name = "OP_NVERIFY",
2282cd2c 2181 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2182 },
2183 [OP_OPEN] = {
2184 .op_func = (nfsd4op_func)nfsd4_open,
58e7b33a 2185 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2186 .op_name = "OP_OPEN",
58e7b33a 2187 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize,
8b70484c 2188 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid,
b591480b
BF		 2189 },
2190 [OP_OPEN_CONFIRM] = {
2191 .op_func = (nfsd4op_func)nfsd4_open_confirm,
58e7b33a 2192 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2193 .op_name = "OP_OPEN_CONFIRM",
58e7b33a 2194 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
b591480b
BF		 2195 },
2196 [OP_OPEN_DOWNGRADE] = {
2197 .op_func = (nfsd4op_func)nfsd4_open_downgrade,
58e7b33a 2198 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2199 .op_name = "OP_OPEN_DOWNGRADE",
58e7b33a 2200 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize,
9428fe1a
TM		 2201 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid,
2202 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid,
b591480b
BF		 2203 },
2204 [OP_PUTFH] = {
2205 .op_func = (nfsd4op_func)nfsd4_putfh,
68d93184 2206 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2207 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2208 .op_name = "OP_PUTFH",
58e7b33a 2209 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2210 },
eeac294e 2211 [OP_PUTPUBFH] = {
a1c8c4d1 2212 .op_func = (nfsd4op_func)nfsd4_putrootfh,
68d93184 2213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2214 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2215 .op_name = "OP_PUTPUBFH",
58e7b33a 2216 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
eeac294e 2217 },
b591480b
BF		 2218 [OP_PUTROOTFH] = {
2219 .op_func = (nfsd4op_func)nfsd4_putrootfh,
68d93184 2220 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2221 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2222 .op_name = "OP_PUTROOTFH",
58e7b33a 2223 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2224 },
2225 [OP_READ] = {
2226 .op_func = (nfsd4op_func)nfsd4_read,
b001a1b6 2227 .op_name = "OP_READ",
58e7b33a 2228 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize,
30813e27 2229 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid,
b591480b
BF		 2230 },
2231 [OP_READDIR] = {
2232 .op_func = (nfsd4op_func)nfsd4_readdir,
b001a1b6 2233 .op_name = "OP_READDIR",
58e7b33a 2234 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize,
b591480b
BF		 2235 },
2236 [OP_READLINK] = {
2237 .op_func = (nfsd4op_func)nfsd4_readlink,
b001a1b6 2238 .op_name = "OP_READLINK",
2282cd2c 2239 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readlink_rsize,
b591480b
BF		 2240 },
2241 [OP_REMOVE] = {
2242 .op_func = (nfsd4op_func)nfsd4_remove,
c856694e 2243 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2244 .op_name = "OP_REMOVE",
58e7b33a 2245 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize,
b591480b
BF		 2246 },
2247 [OP_RENAME] = {
2248 .op_func = (nfsd4op_func)nfsd4_rename,
c856694e 2249 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2250 .op_name = "OP_RENAME",
58e7b33a 2251 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize,
b591480b
BF		 2252 },
2253 [OP_RENEW] = {
2254 .op_func = (nfsd4op_func)nfsd4_renew,
58e7b33a
MJ		 2255 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2256 | OP_MODIFIES_SOMETHING,
b001a1b6 2257 .op_name = "OP_RENEW",
58e7b33a
MJ		 2258 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2259
b591480b
BF		 2260 },
2261 [OP_RESTOREFH] = {
2262 .op_func = (nfsd4op_func)nfsd4_restorefh,
68d93184 2263 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2264 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2265 .op_name = "OP_RESTOREFH",
58e7b33a 2266 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2267 },
2268 [OP_SAVEFH] = {
2269 .op_func = (nfsd4op_func)nfsd4_savefh,
58e7b33a 2270 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2271 .op_name = "OP_SAVEFH",
58e7b33a 2272 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2273 },
dcb488a3
AA		 2274 [OP_SECINFO] = {
2275 .op_func = (nfsd4op_func)nfsd4_secinfo,
68d93184 2276 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2277 .op_name = "OP_SECINFO",
2282cd2c 2278 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize,
dcb488a3 2279 },
b591480b
BF		 2280 [OP_SETATTR] = {
2281 .op_func = (nfsd4op_func)nfsd4_setattr,
b001a1b6 2282 .op_name = "OP_SETATTR",
c856694e 2283 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2284 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize,
1e97b519 2285 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid,
b591480b
BF		 2286 },
2287 [OP_SETCLIENTID] = {
2288 .op_func = (nfsd4op_func)nfsd4_setclientid,
58e7b33a 2289 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2290 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2291 .op_name = "OP_SETCLIENTID",
58e7b33a 2292 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize,
b591480b
BF		 2293 },
2294 [OP_SETCLIENTID_CONFIRM] = {
2295 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm,
58e7b33a 2296 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2297 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2298 .op_name = "OP_SETCLIENTID_CONFIRM",
58e7b33a 2299 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2300 },
2301 [OP_VERIFY] = {
2302 .op_func = (nfsd4op_func)nfsd4_verify,
b001a1b6 2303 .op_name = "OP_VERIFY",
2282cd2c 2304 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b
BF		 2305 },
2306 [OP_WRITE] = {
2307 .op_func = (nfsd4op_func)nfsd4_write,
c856694e 2308 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2309 .op_name = "OP_WRITE",
58e7b33a 2310 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize,
30813e27 2311 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid,
b591480b
BF		 2312 },
2313 [OP_RELEASE_LOCKOWNER] = {
2314 .op_func = (nfsd4op_func)nfsd4_release_lockowner,
58e7b33a
MJ		 2315 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2316 | OP_MODIFIES_SOMETHING,
b001a1b6 2317 .op_name = "OP_RELEASE_LOCKOWNER",
58e7b33a 2318 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b591480b 2319 },
069b6ad4
AA		 2320
2321 /* NFSv4.1 operations */
2322 [OP_EXCHANGE_ID] = {
2323 .op_func = (nfsd4op_func)nfsd4_exchange_id,
58e7b33a
MJ		 2324 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2325 | OP_MODIFIES_SOMETHING,
069b6ad4 2326 .op_name = "OP_EXCHANGE_ID",
58e7b33a 2327 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize,
069b6ad4 2328 },
cb73a9f4
BF		 2329 [OP_BACKCHANNEL_CTL] = {
2330 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl,
2331 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2332 .op_name = "OP_BACKCHANNEL_CTL",
2333 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2334 },
1d1bc8f2
BF		 2335 [OP_BIND_CONN_TO_SESSION] = {
2336 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2337 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2338 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2339 .op_name = "OP_BIND_CONN_TO_SESSION",
58e7b33a 2340 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2341 },
069b6ad4
AA		 2342 [OP_CREATE_SESSION] = {
2343 .op_func = (nfsd4op_func)nfsd4_create_session,
58e7b33a
MJ		 2344 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2345 | OP_MODIFIES_SOMETHING,
069b6ad4 2346 .op_name = "OP_CREATE_SESSION",
58e7b33a 2347 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize,
069b6ad4
AA		 2348 },
2349 [OP_DESTROY_SESSION] = {
2350 .op_func = (nfsd4op_func)nfsd4_destroy_session,
58e7b33a
MJ		 2351 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2352 | OP_MODIFIES_SOMETHING,
069b6ad4 2353 .op_name = "OP_DESTROY_SESSION",
58e7b33a 2354 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
069b6ad4
AA		 2355 },
2356 [OP_SEQUENCE] = {
2357 .op_func = (nfsd4op_func)nfsd4_sequence,
f9bb94c4 2358 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2359 .op_name = "OP_SEQUENCE",
d1d84c96 2360 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize,
069b6ad4 2361 },
094b5d74 2362 [OP_DESTROY_CLIENTID] = {
345c2842 2363 .op_func = (nfsd4op_func)nfsd4_destroy_clientid,
58e7b33a
MJ		 2364 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2365 | OP_MODIFIES_SOMETHING,
094b5d74 2366 .op_name = "OP_DESTROY_CLIENTID",
58e7b33a 2367 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
094b5d74 2368 },
4dc6ec00
BF		 2369 [OP_RECLAIM_COMPLETE] = {
2370 .op_func = (nfsd4op_func)nfsd4_reclaim_complete,
58e7b33a 2371 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2372 .op_name = "OP_RECLAIM_COMPLETE",
58e7b33a 2373 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
4dc6ec00 2374 },
04f4ad16
BF		 2375 [OP_SECINFO_NO_NAME] = {
2376 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name,
68d93184 2377 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2378 .op_name = "OP_SECINFO_NO_NAME",
2282cd2c 2379 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize,
04f4ad16 2380 },
17456804
BS		 2381 [OP_TEST_STATEID] = {
2382 .op_func = (nfsd4op_func)nfsd4_test_stateid,
2383 .op_flags = ALLOWED_WITHOUT_FH,
2384 .op_name = "OP_TEST_STATEID",
2282cd2c 2385 .op_rsize_bop = (nfsd4op_rsize)nfsd4_test_stateid_rsize,
17456804 2386 },
e1ca12df
BS		 2387 [OP_FREE_STATEID] = {
2388 .op_func = (nfsd4op_func)nfsd4_free_stateid,
58e7b33a 2389 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2390 .op_name = "OP_FREE_STATEID",
a1dc6955 2391 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid,
58e7b33a 2392 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
e1ca12df 2393 },
9cf514cc
CH		 2394#ifdef CONFIG_NFSD_PNFS
2395 [OP_GETDEVICEINFO] = {
2396 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo,
2397 .op_flags = ALLOWED_WITHOUT_FH,
2398 .op_name = "OP_GETDEVICEINFO",
2282cd2c 2399 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 2400 },
2401 [OP_LAYOUTGET] = {
2402 .op_func = (nfsd4op_func)nfsd4_layoutget,
2403 .op_flags = OP_MODIFIES_SOMETHING,
2404 .op_name = "OP_LAYOUTGET",
2405 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize,
2406 },
2407 [OP_LAYOUTCOMMIT] = {
2408 .op_func = (nfsd4op_func)nfsd4_layoutcommit,
2409 .op_flags = OP_MODIFIES_SOMETHING,
2410 .op_name = "OP_LAYOUTCOMMIT",
2411 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize,
2412 },
2413 [OP_LAYOUTRETURN] = {
2414 .op_func = (nfsd4op_func)nfsd4_layoutreturn,
2415 .op_flags = OP_MODIFIES_SOMETHING,
2416 .op_name = "OP_LAYOUTRETURN",
2417 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize,
2418 },
2419#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2420
2421 /* NFSv4.2 operations */
95d871f0
AS		 2422 [OP_ALLOCATE] = {
2423 .op_func = (nfsd4op_func)nfsd4_allocate,
2424 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2425 .op_name = "OP_ALLOCATE",
beaca234 2426 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
95d871f0 2427 },
b0cb9085
AS		 2428 [OP_DEALLOCATE] = {
2429 .op_func = (nfsd4op_func)nfsd4_deallocate,
2430 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2431 .op_name = "OP_DEALLOCATE",
beaca234 2432 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
b0cb9085 2433 },
ffa0160a
CH		 2434 [OP_CLONE] = {
2435 .op_func = (nfsd4op_func)nfsd4_clone,
2436 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2437 .op_name = "OP_CLONE",
2438 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize,
2439 },
29ae7f9d
AS		 2440 [OP_COPY] = {
2441 .op_func = (nfsd4op_func)nfsd4_copy,
2442 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2443 .op_name = "OP_COPY",
2444 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize,
2445 },
24bab491
AS		 2446 [OP_SEEK] = {
2447 .op_func = (nfsd4op_func)nfsd4_seek,
2448 .op_name = "OP_SEEK",
2282cd2c 2449 .op_rsize_bop = (nfsd4op_rsize)nfsd4_seek_rsize,
24bab491 2450 },
b591480b
BF		 2451};
2452
ed941643
AE		 2453/**
2454 * nfsd4_spo_must_allow - Determine if the compound op contains an
2455 * operation that is allowed to be sent with machine credentials
2456 *
2457 * @rqstp: a pointer to the struct svc_rqst
2458 *
2459 * Checks to see if the compound contains a spo_must_allow op
2460 * and confirms that it was sent with the proper machine creds.
2461 */
2462
2463bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2464{
2465 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2466 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2467 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2468 struct nfsd4_compound_state *cstate = &resp->cstate;
2469 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2470 u32 opiter;
2471
2472 if (!cstate->minorversion)
2473 return false;
2474
2475 if (cstate->spo_must_allowed == true)
2476 return true;
2477
2478 opiter = resp->opcnt;
2479 while (opiter < argp->opcnt) {
2480 this = &argp->ops[opiter++];
2481 if (test_bit(this->opnum, allow->u.longs) &&
2482 cstate->clp->cl_mach_cred &&
2483 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2484 cstate->spo_must_allowed = true;
2485 return true;
2486 }
2487 }
2488 cstate->spo_must_allowed = false;
2489 return false;
2490}
2491
4f0cefbf
BF		 2492int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2493{
05b7278d 2494 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 2495 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 2496
2497 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2498 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 2499}
2500
07d1f802
BF		 2501void warn_on_nonidempotent_op(struct nfsd4_op *op)
2502{
2503 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2504 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2505 op->opnum, nfsd4_op_name(op->opnum));
2506 WARN_ON_ONCE(1);
2507 }
2508}
2509
f1c7f79b 2510static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2511{
2512 if (opnum < ARRAY_SIZE(nfsd4_ops))
2513 return nfsd4_ops[opnum].op_name;
2514 return "unknown_operation";
2515}
2516
1da177e4 2517#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2518struct nfsd4_voidargs { int dummy; };
2519
1da177e4 2520static struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 2521 [NFSPROC4_NULL] = {
f7235b6b 2522 .pc_func = nfsd4_proc_null,
63f8de37 2523 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 2524 .pc_argsize = sizeof(struct nfsd4_voidargs),
2525 .pc_ressize = sizeof(struct nfsd4_voidres),
2526 .pc_cachetype = RC_NOCACHE,
2527 .pc_xdrressize = 1,
2528 },
2529 [NFSPROC4_COMPOUND] = {
f7235b6b 2530 .pc_func = nfsd4_proc_compound,
026fec7e 2531 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 2532 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 2533 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2534 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2535 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2536 .pc_cachetype = RC_NOCACHE,
2537 .pc_xdrressize = NFSD_BUFSIZE/4,
2538 },
1da177e4
LT		 2539};
2540
2541struct svc_version nfsd_version4 = {
5283b03e
JL		 2542 .vs_vers = 4,
2543 .vs_nproc = 2,
2544 .vs_proc = nfsd_procedures4,
2545 .vs_dispatch = nfsd_dispatch,
2546 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2547 .vs_rpcb_optnl = true,
2548 .vs_need_cong_ctrl = true,
1da177e4
LT		 2549};
2550
2551/*
2552 * Local variables:
2553 * c-basic-offset: 8
2554 * End:
2555 */
Michael's Linux tree.