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Merge tag 'platform-drivers-x86-v4.19-1' of git://git.infradead.org/linux-platform...
[mirror_ubuntu-eoan-kernel.git] / fs / nfsd / nfs4proc.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4 34 */
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);
6668958f 357
fe0750e5 358 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 359 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 360 open->op_openowner);
1da177e4 361
1da177e4
LT		 362 /* This check required by spec. */
363 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
364 return nfserr_inval;
365
856121b2 366 open->op_created = 0;
ab1350b2
MJ		 367 /*
368 * RFC5661 18.51.3
369 * Before RECLAIM_COMPLETE done, server should deny new lock
370 */
371 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 372 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
373 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 374 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
375 return nfserr_grace;
376
60adfc50
AA		 377 if (nfsd4_has_session(cstate))
378 copy_clientid(&open->op_clientid, cstate->session);
379
1da177e4 380 /* check seqid for replay. set nfs4_owner */
6cd22668 381 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 382 if (status == nfserr_replay_me) {
fe0750e5 383 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 384 fh_put(&cstate->current_fh);
a4773c08
BF		 385 fh_copy_shallow(&cstate->current_fh.fh_handle,
386 &rp->rp_openfh);
8837abca 387 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 388 if (status)
389 dprintk("nfsd4_open: replay failed"
390 " restoring previous filehandle\n");
391 else
a90b061c 392 status = nfserr_replay_me;
1da177e4
LT		 393 }
394 if (status)
395 goto out;
9d313b17
BF		 396 if (open->op_xdr_error) {
397 status = open->op_xdr_error;
398 goto out;
399 }
fb553c0f 400
3c8e0316
YZ		 401 status = nfsd4_check_open_attributes(rqstp, cstate, open);
402 if (status)
403 goto out;
404
fb553c0f
BF		 405 /* Openowner is now set, so sequence id will get bumped. Now we need
406 * these checks before we do any creates: */
cbd0d51a 407 status = nfserr_grace;
c87fb4a3 408 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 409 goto out;
410 status = nfserr_no_grace;
c87fb4a3 411 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 412 goto out;
fb553c0f 413
1da177e4 414 switch (open->op_claim_type) {
0dd3c192 415 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 416 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 417 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 418 if (status)
419 goto out;
420 break;
421 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 422 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 423 cstate, nn);
0cf99b91
MJ		 424 if (status)
425 goto out;
ba5378b6 426 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
8b289b2c
BF		 427 case NFS4_OPEN_CLAIM_FH:
428 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 429 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 430 if (status)
431 goto out;
c0e6bee4 432 resfh = &cstate->current_fh;
1da177e4 433 break;
8b289b2c 434 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 435 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 436 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 437 open->op_claim_type);
438 status = nfserr_notsupp;
439 goto out;
440 default:
2fdada03 441 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 442 open->op_claim_type);
443 status = nfserr_inval;
444 goto out;
445 }
446 /*
447 * nfsd4_process_open2() does the actual opening of the file. If
448 * successful, it (1) truncates the file if open->op_truncate was
449 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
450 */
c0e6bee4 451 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 452 WARN(status && open->op_created,
453 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
454 be32_to_cpu(status));
1da177e4 455out:
c0e6bee4
BF		 456 if (resfh && resfh != &cstate->current_fh) {
457 fh_dup2(&cstate->current_fh, resfh);
458 fh_put(resfh);
459 kfree(resfh);
460 }
42297899 461 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 462 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 463 return status;
464}
465
9d313b17
BF		 466/*
467 * OPEN is the only seqid-mutating operation whose decoding can fail
468 * with a seqid-mutating error (specifically, decoding of user names in
469 * the attributes). Therefore we have to do some processing to look up
470 * the stateowner so that we can bump the seqid.
471 */
472static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
473{
eb69853d 474 struct nfsd4_open *open = &op->u.open;
9d313b17
BF		 475
476 if (!seqid_mutating_err(ntohl(op->status)))
477 return op->status;
478 if (nfsd4_has_session(cstate))
479 return op->status;
480 open->op_xdr_error = op->status;
eb69853d 481 return nfsd4_open(rqstp, cstate, &op->u);
9d313b17
BF		 482}
483
1da177e4
LT		 484/*
485 * filehandle-manipulating ops.
486 */
7191155b 487static __be32
b591480b 488nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 489 union nfsd4_op_u *u)
1da177e4 490{
eb69853d 491 u->getfh = &cstate->current_fh;
1da177e4
LT		 492 return nfs_ok;
493}
494
7191155b 495static __be32
ca364317 496nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 497 union nfsd4_op_u *u)
1da177e4 498{
eb69853d
CH		 499 struct nfsd4_putfh *putfh = &u->putfh;
500
ca364317
BF		 501 fh_put(&cstate->current_fh);
502 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
503 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
504 putfh->pf_fhlen);
68d93184 505 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
1da177e4
LT		 506}
507
7191155b 508static __be32
b591480b 509nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 510 union nfsd4_op_u *u)
1da177e4 511{
b37ad28b 512 __be32 status;
1da177e4 513
ca364317 514 fh_put(&cstate->current_fh);
df547efb 515 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 516 return status;
517}
518
7191155b 519static __be32
b591480b 520nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 521 union nfsd4_op_u *u)
1da177e4 522{
ca364317 523 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 524 return nfserr_restorefh;
525
ca364317 526 fh_dup2(&cstate->current_fh, &cstate->save_fh);
37c593c5
TM		 527 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) {
528 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
529 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG);
530 }
1da177e4
LT		 531 return nfs_ok;
532}
533
7191155b 534static __be32
b591480b 535nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 536 union nfsd4_op_u *u)
1da177e4 537{
ca364317 538 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 550nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 551 union nfsd4_op_u *u)
1da177e4 552{
eb69853d
CH		 553 struct nfsd4_access *access = &u->access;
554
1da177e4
LT		 555 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
556 return nfserr_inval;
557
558 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 559 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
560 &access->ac_supported);
1da177e4
LT		 561}
562
b9c0ef85 563static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1
CL		 564{
565 __be32 verf[2];
b9c0ef85 566 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
ab4684d1 567
f419992c
JL		 568 /*
569 * This is opaque to client, so no need to byte-swap. Use
256a89fa
AB		 570 * __force to keep sparse happy. y2038 time_t overflow is
571 * irrelevant in this usage.
f419992c
JL		 572 */
573 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec;
256a89fa 574 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec;
ab4684d1
CL		 575 memcpy(verifier->data, verf, sizeof(verifier->data));
576}
577
7191155b 578static __be32
ca364317 579nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 580 union nfsd4_op_u *u)
1da177e4 581{
eb69853d
CH		 582 struct nfsd4_commit *commit = &u->commit;
583
b9c0ef85 584 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
75c096f7 585 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
ca364317 586 commit->co_count);
1da177e4
LT		 587}
588
b37ad28b 589static __be32
ca364317 590nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 591 union nfsd4_op_u *u)
1da177e4 592{
eb69853d 593 struct nfsd4_create *create = &u->create;
1da177e4 594 struct svc_fh resfh;
b37ad28b 595 __be32 status;
1da177e4
LT		 596 dev_t rdev;
597
598 fh_init(&resfh, NFS4_FHSIZE);
599
fa08139d 600 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 601 if (status)
602 return status;
603
3c8e0316
YZ		 604 status = check_attr_support(rqstp, cstate, create->cr_bmval,
605 nfsd_attrmask);
606 if (status)
607 return status;
608
880a3a53 609 current->fs->umask = create->cr_umask;
1da177e4
LT		 610 switch (create->cr_type) {
611 case NF4LNK:
ca364317
BF		 612 status = nfsd_symlink(rqstp, &cstate->current_fh,
613 create->cr_name, create->cr_namelen,
1e444f5b 614 create->cr_data, &resfh);
1da177e4
LT		 615 break;
616
617 case NF4BLK:
880a3a53 618 status = nfserr_inval;
1da177e4
LT		 619 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
620 if (MAJOR(rdev) != create->cr_specdata1 ||
621 MINOR(rdev) != create->cr_specdata2)
880a3a53 622 goto out_umask;
ca364317
BF		 623 status = nfsd_create(rqstp, &cstate->current_fh,
624 create->cr_name, create->cr_namelen,
625 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 626 break;
627
628 case NF4CHR:
880a3a53 629 status = nfserr_inval;
1da177e4
LT		 630 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
631 if (MAJOR(rdev) != create->cr_specdata1 ||
632 MINOR(rdev) != create->cr_specdata2)
880a3a53 633 goto out_umask;
ca364317
BF		 634 status = nfsd_create(rqstp, &cstate->current_fh,
635 create->cr_name, create->cr_namelen,
636 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 637 break;
638
639 case NF4SOCK:
ca364317
BF		 640 status = nfsd_create(rqstp, &cstate->current_fh,
641 create->cr_name, create->cr_namelen,
642 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 643 break;
644
645 case NF4FIFO:
ca364317
BF		 646 status = nfsd_create(rqstp, &cstate->current_fh,
647 create->cr_name, create->cr_namelen,
648 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 649 break;
650
651 case NF4DIR:
652 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 653 status = nfsd_create(rqstp, &cstate->current_fh,
654 create->cr_name, create->cr_namelen,
655 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 656 break;
657
658 default:
659 status = nfserr_badtype;
660 }
661
9208faf2
YZ		 662 if (status)
663 goto out;
1da177e4 664
18032ca0
DQ		 665 if (create->cr_label.len)
666 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
667
9208faf2
YZ		 668 if (create->cr_acl != NULL)
669 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
670 create->cr_bmval);
671
672 fh_unlock(&cstate->current_fh);
673 set_change_info(&create->cr_cinfo, &cstate->current_fh);
674 fh_dup2(&cstate->current_fh, &resfh);
675out:
1da177e4 676 fh_put(&resfh);
880a3a53
BF		 677out_umask:
678 current->fs->umask = 0;
1da177e4
LT		 679 return status;
680}
681
7191155b 682static __be32
ca364317 683nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 684 union nfsd4_op_u *u)
1da177e4 685{
eb69853d 686 struct nfsd4_getattr *getattr = &u->getattr;
b37ad28b 687 __be32 status;
1da177e4 688
8837abca 689 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 690 if (status)
691 return status;
692
693 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
694 return nfserr_inval;
695
916d2d84
BF		 696 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
697 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
698 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 699
ca364317 700 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 701 return nfs_ok;
702}
703
7191155b 704static __be32
ca364317 705nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 706 union nfsd4_op_u *u)
1da177e4 707{
eb69853d 708 struct nfsd4_link *link = &u->link;
95424460 709 __be32 status;
1da177e4 710
ca364317
BF		 711 status = nfsd_link(rqstp, &cstate->current_fh,
712 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 713 if (!status)
ca364317 714 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 715 return status;
716}
717
0ff7ab46 718static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 719{
720 struct svc_fh tmp_fh;
b37ad28b 721 __be32 ret;
1da177e4
LT		 722
723 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 724 ret = exp_pseudoroot(rqstp, &tmp_fh);
725 if (ret)
1da177e4 726 return ret;
0ff7ab46 727 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 728 fh_put(&tmp_fh);
729 return nfserr_noent;
730 }
731 fh_put(&tmp_fh);
0ff7ab46
BF		 732 return nfsd_lookup(rqstp, fh, "..", 2, fh);
733}
734
735static __be32
736nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 737 union nfsd4_op_u *u)
0ff7ab46
BF		 738{
739 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 740}
741
7191155b 742static __be32
ca364317 743nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 744 union nfsd4_op_u *u)
1da177e4 745{
ca364317 746 return nfsd_lookup(rqstp, &cstate->current_fh,
eb69853d 747 u->lookup.lo_name, u->lookup.lo_len,
ca364317 748 &cstate->current_fh);
1da177e4
LT		 749}
750
7191155b 751static __be32
ca364317 752nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 753 union nfsd4_op_u *u)
1da177e4 754{
eb69853d 755 struct nfsd4_read *read = &u->read;
b37ad28b 756 __be32 status;
1da177e4 757
7e06b7f9 758 read->rd_filp = NULL;
1da177e4
LT		 759 if (read->rd_offset >= OFFSET_MAX)
760 return nfserr_inval;
761
87c5942e
CL		 762 trace_nfsd_read_start(rqstp, &cstate->current_fh,
763 read->rd_offset, read->rd_length);
764
9b3234b9
BF		 765 /*
766 * If we do a zero copy read, then a client will see read data
767 * that reflects the state of the file *after* performing the
768 * following compound.
769 *
770 * To ensure proper ordering, we therefore turn off zero copy if
771 * the client wants us to do more in this compound:
772 */
773 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 774 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 775
1da177e4 776 /* check stateid */
aa0d6aed
AS		 777 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
778 &read->rd_stateid, RD_STATE,
779 &read->rd_filp, &read->rd_tmp_file);
af90f707 780 if (status) {
1da177e4
LT		 781 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
782 goto out;
783 }
784 status = nfs_ok;
785out:
1da177e4 786 read->rd_rqstp = rqstp;
ca364317 787 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 788 return status;
789}
790
34b1744c
BF		 791
792static void
793nfsd4_read_release(union nfsd4_op_u *u)
794{
795 if (u->read.rd_filp)
796 fput(u->read.rd_filp);
87c5942e
CL		 797 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
798 u->read.rd_offset, u->read.rd_length);
34b1744c
BF		 799}
800
7191155b 801static __be32
ca364317 802nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 803 union nfsd4_op_u *u)
1da177e4 804{
eb69853d 805 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 806 u64 cookie = readdir->rd_cookie;
807 static const nfs4_verifier zeroverf;
808
809 /* no need to check permission - this will be done in nfsd_readdir() */
810
811 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
812 return nfserr_inval;
813
916d2d84
BF		 814 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
815 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
816 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 817
832023bf 818 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 819 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
820 return nfserr_bad_cookie;
821
822 readdir->rd_rqstp = rqstp;
ca364317 823 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 824 return nfs_ok;
825}
826
7191155b 827static __be32
ca364317 828nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 829 union nfsd4_op_u *u)
1da177e4 830{
eb69853d
CH		 831 u->readlink.rl_rqstp = rqstp;
832 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 833 return nfs_ok;
834}
835
7191155b 836static __be32
ca364317 837nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 838 union nfsd4_op_u *u)
1da177e4 839{
eb69853d 840 struct nfsd4_remove *remove = &u->remove;
b37ad28b 841 __be32 status;
1da177e4 842
c87fb4a3 843 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 844 return nfserr_grace;
ca364317
BF		 845 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
846 remove->rm_name, remove->rm_namelen);
1da177e4 847 if (!status) {
ca364317
BF		 848 fh_unlock(&cstate->current_fh);
849 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 850 }
851 return status;
852}
853
7191155b 854static __be32
ca364317 855nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 856 union nfsd4_op_u *u)
1da177e4 857{
eb69853d 858 struct nfsd4_rename *rename = &u->rename;
95424460 859 __be32 status;
1da177e4 860
c87fb4a3 861 if (opens_in_grace(SVC_NET(rqstp)) &&
5ccb0066 862 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK))
c815afc7 863 return nfserr_grace;
ca364317
BF		 864 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
865 rename->rn_snamelen, &cstate->current_fh,
1da177e4 866 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 867 if (status)
868 return status;
869 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
870 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
871 return nfs_ok;
1da177e4
LT		 872}
873
dcb488a3
AA		 874static __be32
875nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 876 union nfsd4_op_u *u)
dcb488a3 877{
eb69853d 878 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 879 struct svc_export *exp;
880 struct dentry *dentry;
881 __be32 err;
882
29a78a3e
BF		 883 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
884 if (err)
885 return err;
dcb488a3
AA		 886 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
887 secinfo->si_name, secinfo->si_namelen,
888 &exp, &dentry);
889 if (err)
890 return err;
2f6fc056 891 fh_unlock(&cstate->current_fh);
2b0143b5 892 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 893 exp_put(exp);
894 err = nfserr_noent;
895 } else
896 secinfo->si_exp = exp;
897 dput(dentry);
56560b9a
BF		 898 if (cstate->minorversion)
899 /* See rfc 5661 section 2.6.3.1.1.8 */
900 fh_put(&cstate->current_fh);
dcb488a3
AA		 901 return err;
902}
903
04f4ad16
BF		 904static __be32
905nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 906 union nfsd4_op_u *u)
04f4ad16
BF		 907{
908 __be32 err;
909
eb69853d 910 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 911 case NFS4_SECINFO_STYLE4_CURRENT_FH:
912 break;
913 case NFS4_SECINFO_STYLE4_PARENT:
914 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
915 if (err)
916 return err;
917 break;
918 default:
919 return nfserr_inval;
920 }
bf18f163 921
eb69853d 922 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 923 fh_put(&cstate->current_fh);
924 return nfs_ok;
925}
926
34b1744c
BF		 927static void
928nfsd4_secinfo_release(union nfsd4_op_u *u)
929{
930 if (u->secinfo.si_exp)
931 exp_put(u->secinfo.si_exp);
932}
933
ec572b9e
EG		 934static void
935nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
936{
937 if (u->secinfo_no_name.sin_exp)
938 exp_put(u->secinfo_no_name.sin_exp);
939}
940
7191155b 941static __be32
ca364317 942nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 943 union nfsd4_op_u *u)
1da177e4 944{
eb69853d 945 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 946 __be32 status = nfs_ok;
96f6f985 947 int err;
1da177e4 948
1da177e4 949 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 950 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed
AS		 951 &cstate->current_fh, &setattr->sa_stateid,
952 WR_STATE, NULL, NULL);
375c5547 953 if (status) {
3e3b4800 954 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 955 return status;
956 }
1da177e4 957 }
96f6f985
AV		 958 err = fh_want_write(&cstate->current_fh);
959 if (err)
960 return nfserrno(err);
1da177e4 961 status = nfs_ok;
3c8e0316
YZ		 962
963 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
964 nfsd_attrmask);
965 if (status)
966 goto out;
967
1da177e4 968 if (setattr->sa_acl != NULL)
ca364317
BF		 969 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
970 setattr->sa_acl);
1da177e4 971 if (status)
18f335af 972 goto out;
18032ca0
DQ		 973 if (setattr->sa_label.len)
974 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
975 &setattr->sa_label);
976 if (status)
977 goto out;
ca364317 978 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
1da177e4 979 0, (time_t)0);
18f335af 980out:
bad0dcff 981 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 982 return status;
983}
984
ffe1137b
BF		 985static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write)
986{
987 int i = 1;
988 int buflen = write->wr_buflen;
989
990 vec[0].iov_base = write->wr_head.iov_base;
991 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len);
992 buflen -= vec[0].iov_len;
993
994 while (buflen) {
995 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]);
996 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen);
997 buflen -= vec[i].iov_len;
998 i++;
999 }
1000 return i;
1001}
1002
7191155b 1003static __be32
ca364317 1004nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1005 union nfsd4_op_u *u)
1da177e4 1006{
eb69853d 1007 struct nfsd4_write *write = &u->write;
1da177e4
LT		 1008 stateid_t *stateid = &write->wr_stateid;
1009 struct file *filp = NULL;
b37ad28b 1010 __be32 status = nfs_ok;
31dec253 1011 unsigned long cnt;
ffe1137b 1012 int nvecs;
1da177e4 1013
1da177e4
LT		 1014 if (write->wr_offset >= OFFSET_MAX)
1015 return nfserr_inval;
1016
d890be15
CL		 1017 cnt = write->wr_buflen;
1018 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1019 write->wr_offset, cnt);
aa0d6aed
AS		 1020 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1021 stateid, WR_STATE, &filp, NULL);
375c5547
BF		 1022 if (status) {
1023 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1024 return status;
1025 }
1026
1da177e4 1027 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1028 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1029
ffe1137b
BF		 1030 nvecs = fill_in_write_vector(rqstp->rq_vec, write);
1031 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1032
af90f707
CH		 1033 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
1034 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 1035 write->wr_how_written);
af90f707 1036 fput(filp);
1da177e4 1037
31dec253 1038 write->wr_bytes_written = cnt;
d890be15
CL		 1039 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1040 write->wr_offset, cnt);
1da177e4 1041 return status;
1da177e4
LT		 1042}
1043
ffa0160a 1044static __be32
29ae7f9d
AS		 1045nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1046 stateid_t *src_stateid, struct file **src,
1047 stateid_t *dst_stateid, struct file **dst)
ffa0160a 1048{
ffa0160a
CH		 1049 __be32 status;
1050
1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
29ae7f9d 1052 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1053 if (status) {
1054 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1055 goto out;
1056 }
1057
1058 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
29ae7f9d 1059 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1060 if (status) {
1061 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1062 goto out_put_src;
1063 }
1064
1065 /* fix up for NFS-specific error code */
29ae7f9d
AS		 1066 if (!S_ISREG(file_inode(*src)->i_mode) ||
1067 !S_ISREG(file_inode(*dst)->i_mode)) {
ffa0160a
CH		 1068 status = nfserr_wrong_type;
1069 goto out_put_dst;
1070 }
1071
29ae7f9d
AS		 1072out:
1073 return status;
1074out_put_dst:
1075 fput(*dst);
1076out_put_src:
1077 fput(*src);
1078 goto out;
1079}
1080
1081static __be32
1082nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1083 union nfsd4_op_u *u)
29ae7f9d 1084{
eb69853d 1085 struct nfsd4_clone *clone = &u->clone;
29ae7f9d
AS		 1086 struct file *src, *dst;
1087 __be32 status;
1088
1089 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1090 &clone->cl_dst_stateid, &dst);
1091 if (status)
1092 goto out;
1093
ffa0160a
CH		 1094 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1095 dst, clone->cl_dst_pos, clone->cl_count);
1096
ffa0160a 1097 fput(dst);
ffa0160a
CH		 1098 fput(src);
1099out:
1100 return status;
1101}
1102
29ae7f9d
AS		 1103static __be32
1104nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1105 union nfsd4_op_u *u)
29ae7f9d 1106{
eb69853d 1107 struct nfsd4_copy *copy = &u->copy;
29ae7f9d
AS		 1108 struct file *src, *dst;
1109 __be32 status;
1110 ssize_t bytes;
1111
1112 status = nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid, &src,
1113 &copy->cp_dst_stateid, &dst);
1114 if (status)
1115 goto out;
1116
1117 bytes = nfsd_copy_file_range(src, copy->cp_src_pos,
1118 dst, copy->cp_dst_pos, copy->cp_count);
1119
1120 if (bytes < 0)
1121 status = nfserrno(bytes);
1122 else {
1123 copy->cp_res.wr_bytes_written = bytes;
1124 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
29ae7f9d
AS		 1125 copy->cp_synchronous = 1;
1126 gen_boot_verifier(&copy->cp_res.wr_verifier, SVC_NET(rqstp));
1127 status = nfs_ok;
1128 }
1129
1130 fput(src);
1131 fput(dst);
1132out:
1133 return status;
1134}
1135
95d871f0
AS		 1136static __be32
1137nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1138 struct nfsd4_fallocate *fallocate, int flags)
1139{
1140 __be32 status = nfserr_notsupp;
1141 struct file *file;
1142
aa0d6aed 1143 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1144 &fallocate->falloc_stateid,
af90f707 1145 WR_STATE, &file, NULL);
95d871f0
AS		 1146 if (status != nfs_ok) {
1147 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1148 return status;
1149 }
1150
1151 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file,
1152 fallocate->falloc_offset,
1153 fallocate->falloc_length,
1154 flags);
1155 fput(file);
1156 return status;
1157}
1158
1159static __be32
1160nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1161 union nfsd4_op_u *u)
95d871f0 1162{
eb69853d 1163 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1164}
1165
b0cb9085
AS		 1166static __be32
1167nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1168 union nfsd4_op_u *u)
b0cb9085 1169{
eb69853d 1170 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1171 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1172}
1173
24bab491
AS		 1174static __be32
1175nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1176 union nfsd4_op_u *u)
24bab491 1177{
eb69853d 1178 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1179 int whence;
1180 __be32 status;
1181 struct file *file;
1182
aa0d6aed 1183 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1184 &seek->seek_stateid,
af90f707 1185 RD_STATE, &file, NULL);
24bab491
AS		 1186 if (status) {
1187 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1188 return status;
1189 }
1190
1191 switch (seek->seek_whence) {
1192 case NFS4_CONTENT_DATA:
1193 whence = SEEK_DATA;
1194 break;
1195 case NFS4_CONTENT_HOLE:
1196 whence = SEEK_HOLE;
1197 break;
1198 default:
1199 status = nfserr_union_notsupp;
1200 goto out;
1201 }
1202
1203 /*
1204 * Note: This call does change file->f_pos, but nothing in NFSD
1205 * should ever file->f_pos.
1206 */
1207 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence);
1208 if (seek->seek_pos < 0)
1209 status = nfserrno(seek->seek_pos);
1210 else if (seek->seek_pos >= i_size_read(file_inode(file)))
1211 seek->seek_eof = true;
1212
1213out:
1214 fput(file);
1215 return status;
1216}
1217
1da177e4
LT		 1218/* This routine never returns NFS_OK! If there are no other errors, it
1219 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1220 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1221 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1222 */
b37ad28b 1223static __be32
c954e2a5 1224_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1225 struct nfsd4_verify *verify)
1da177e4 1226{
2ebbc012 1227 __be32 *buf, *p;
1da177e4 1228 int count;
b37ad28b 1229 __be32 status;
1da177e4 1230
8837abca 1231 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1232 if (status)
1233 return status;
1234
3c8e0316
YZ		 1235 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1236 if (status)
1237 return status;
1238
1da177e4
LT		 1239 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1240 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1241 return nfserr_inval;
1242 if (verify->ve_attrlen & 3)
1243 return nfserr_inval;
1244
1245 /* count in words:
1246 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1247 */
1248 count = 4 + (verify->ve_attrlen >> 2);
1249 buf = kmalloc(count << 2, GFP_KERNEL);
1250 if (!buf)
3e772463 1251 return nfserr_jukebox;
1da177e4 1252
84822d0b 1253 p = buf;
d5184658 1254 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1255 cstate->current_fh.fh_export,
d5184658
BF		 1256 cstate->current_fh.fh_dentry,
1257 verify->ve_bmval,
406a7ea9 1258 rqstp, 0);
41ae6e71
BF		 1259 /*
1260 * If nfsd4_encode_fattr() ran out of space, assume that's because
1261 * the attributes are longer (hence different) than those given:
1262 */
84822d0b 1263 if (status == nfserr_resource)
1da177e4
LT		 1264 status = nfserr_not_same;
1265 if (status)
1266 goto out_kfree;
1267
95ec28cd
BH		 1268 /* skip bitmap */
1269 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1270 status = nfserr_not_same;
1271 if (ntohl(*p++) != verify->ve_attrlen)
1272 goto out_kfree;
1273 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1274 status = nfserr_same;
1275
1276out_kfree:
1277 kfree(buf);
1278 return status;
1279}
1280
c954e2a5
BF		 1281static __be32
1282nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1283 union nfsd4_op_u *u)
c954e2a5
BF		 1284{
1285 __be32 status;
1286
eb69853d 1287 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1288 return status == nfserr_not_same ? nfs_ok : status;
1289}
1290
1291static __be32
1292nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1293 union nfsd4_op_u *u)
c954e2a5
BF		 1294{
1295 __be32 status;
1296
eb69853d 1297 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1298 return status == nfserr_same ? nfs_ok : status;
1299}
1300
9cf514cc
CH		 1301#ifdef CONFIG_NFSD_PNFS
1302static const struct nfsd4_layout_ops *
1303nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1304{
8a4c3926 1305 if (!exp->ex_layout_types) {
9cf514cc
CH		 1306 dprintk("%s: export does not support pNFS\n", __func__);
1307 return NULL;
1308 }
1309
b550a32e
AK		 1310 if (layout_type >= LAYOUT_TYPE_MAX ||
1311 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1312 dprintk("%s: layout type %d not supported\n",
1313 __func__, layout_type);
1314 return NULL;
1315 }
1316
1317 return nfsd4_layout_ops[layout_type];
1318}
1319
1320static __be32
1321nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1322 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1323{
eb69853d 1324 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1325 const struct nfsd4_layout_ops *ops;
1326 struct nfsd4_deviceid_map *map;
1327 struct svc_export *exp;
1328 __be32 nfserr;
1329
1330 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1331 __func__,
1332 gdp->gd_layout_type,
1333 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1334 gdp->gd_maxcount);
1335
1336 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1337 if (!map) {
1338 dprintk("%s: couldn't find device ID to export mapping!\n",
1339 __func__);
1340 return nfserr_noent;
1341 }
1342
1343 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1344 if (IS_ERR(exp)) {
1345 dprintk("%s: could not find device id\n", __func__);
1346 return nfserr_noent;
1347 }
1348
1349 nfserr = nfserr_layoutunavailable;
1350 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1351 if (!ops)
1352 goto out;
1353
1354 nfserr = nfs_ok;
f99d4fbd
CH		 1355 if (gdp->gd_maxcount != 0) {
1356 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1357 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1358 }
9cf514cc
CH		 1359
1360 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1361out:
a1420384 1362 exp_put(exp);
9cf514cc
CH		 1363 return nfserr;
1364}
1365
34b1744c
BF		 1366static void
1367nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1368{
1369 kfree(u->getdeviceinfo.gd_device);
1370}
1371
9cf514cc
CH		 1372static __be32
1373nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1374 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1375{
eb69853d 1376 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1377 struct svc_fh *current_fh = &cstate->current_fh;
1378 const struct nfsd4_layout_ops *ops;
1379 struct nfs4_layout_stateid *ls;
1380 __be32 nfserr;
66282ec1 1381 int accmode = NFSD_MAY_READ_IF_EXEC;
9cf514cc
CH		 1382
1383 switch (lgp->lg_seg.iomode) {
1384 case IOMODE_READ:
66282ec1 1385 accmode |= NFSD_MAY_READ;
9cf514cc
CH		 1386 break;
1387 case IOMODE_RW:
66282ec1 1388 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
9cf514cc
CH		 1389 break;
1390 default:
1391 dprintk("%s: invalid iomode %d\n",
1392 __func__, lgp->lg_seg.iomode);
1393 nfserr = nfserr_badiomode;
1394 goto out;
1395 }
1396
1397 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1398 if (nfserr)
1399 goto out;
1400
1401 nfserr = nfserr_layoutunavailable;
1402 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1403 if (!ops)
1404 goto out;
1405
1406 /*
1407 * Verify minlength and range as per RFC5661:
1408 * o If loga_length is less than loga_minlength,
1409 * the metadata server MUST return NFS4ERR_INVAL.
1410 * o If the sum of loga_offset and loga_minlength exceeds
1411 * NFS4_UINT64_MAX, and loga_minlength is not
1412 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1413 * o If the sum of loga_offset and loga_length exceeds
1414 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1415 * the error NFS4ERR_INVAL MUST result.
1416 */
1417 nfserr = nfserr_inval;
1418 if (lgp->lg_seg.length < lgp->lg_minlength ||
1419 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1420 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1421 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1422 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1423 goto out;
1424 if (lgp->lg_seg.length == 0)
1425 goto out;
1426
1427 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1428 true, lgp->lg_layout_type, &ls);
31ef83dc 1429 if (nfserr) {
f394b62b 1430 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1431 goto out;
31ef83dc 1432 }
9cf514cc 1433
c5c707f9
CH		 1434 nfserr = nfserr_recallconflict;
1435 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1436 goto out_put_stid;
1437
2b0143b5 1438 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1439 current_fh, lgp);
1440 if (nfserr)
1441 goto out_put_stid;
1442
1443 nfserr = nfsd4_insert_layout(lgp, ls);
1444
1445out_put_stid:
cc8a5532 1446 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1447 nfs4_put_stid(&ls->ls_stid);
1448out:
1449 return nfserr;
1450}
1451
34b1744c
BF		 1452static void
1453nfsd4_layoutget_release(union nfsd4_op_u *u)
1454{
1455 kfree(u->layoutget.lg_content);
1456}
1457
9cf514cc
CH		 1458static __be32
1459nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1460 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1461{
eb69853d 1462 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1463 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1464 struct svc_fh *current_fh = &cstate->current_fh;
1465 const struct nfsd4_layout_ops *ops;
1466 loff_t new_size = lcp->lc_last_wr + 1;
1467 struct inode *inode;
1468 struct nfs4_layout_stateid *ls;
1469 __be32 nfserr;
1470
1471 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1472 if (nfserr)
1473 goto out;
1474
1475 nfserr = nfserr_layoutunavailable;
1476 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
1477 if (!ops)
1478 goto out;
2b0143b5 1479 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 1480
1481 nfserr = nfserr_inval;
1482 if (new_size <= seg->offset) {
1483 dprintk("pnfsd: last write before layout segment\n");
1484 goto out;
1485 }
1486 if (new_size > seg->offset + seg->length) {
1487 dprintk("pnfsd: last write beyond layout segment\n");
1488 goto out;
1489 }
1490 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
1491 dprintk("pnfsd: layoutcommit beyond EOF\n");
1492 goto out;
1493 }
1494
1495 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
1496 false, lcp->lc_layout_type,
1497 &ls);
1498 if (nfserr) {
f394b62b 1499 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 1500 /* fixup error code as per RFC5661 */
1501 if (nfserr == nfserr_bad_stateid)
1502 nfserr = nfserr_badlayout;
1503 goto out;
1504 }
1505
cc8a5532
JL		 1506 /* LAYOUTCOMMIT does not require any serialization */
1507 mutex_unlock(&ls->ls_mutex);
1508
9cf514cc
CH		 1509 if (new_size > i_size_read(inode)) {
1510 lcp->lc_size_chg = 1;
1511 lcp->lc_newsize = new_size;
1512 } else {
1513 lcp->lc_size_chg = 0;
1514 }
1515
d8398fc1 1516 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 1517 nfs4_put_stid(&ls->ls_stid);
1518out:
1519 return nfserr;
1520}
1521
1522static __be32
1523nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 1524 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1525{
eb69853d 1526 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 1527 struct svc_fh *current_fh = &cstate->current_fh;
1528 __be32 nfserr;
1529
1530 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
1531 if (nfserr)
1532 goto out;
1533
1534 nfserr = nfserr_layoutunavailable;
1535 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
1536 goto out;
1537
1538 switch (lrp->lr_seg.iomode) {
1539 case IOMODE_READ:
1540 case IOMODE_RW:
1541 case IOMODE_ANY:
1542 break;
1543 default:
1544 dprintk("%s: invalid iomode %d\n", __func__,
1545 lrp->lr_seg.iomode);
1546 nfserr = nfserr_inval;
1547 goto out;
1548 }
1549
1550 switch (lrp->lr_return_type) {
1551 case RETURN_FILE:
1552 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
1553 break;
1554 case RETURN_FSID:
1555 case RETURN_ALL:
1556 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
1557 break;
1558 default:
1559 dprintk("%s: invalid return_type %d\n", __func__,
1560 lrp->lr_return_type);
1561 nfserr = nfserr_inval;
1562 break;
1563 }
1564out:
1565 return nfserr;
1566}
1567#endif /* CONFIG_NFSD_PNFS */
1568
1da177e4
LT		 1569/*
1570 * NULL call.
1571 */
7111c66e 1572static __be32
a6beb732 1573nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 1574{
1575 return nfs_ok;
1576}
1577
e2b20950
SA		 1578static inline void nfsd4_increment_op_stats(u32 opnum)
1579{
1580 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
1581 nfsdstats.nfs4_opcount[opnum]++;
1582}
1583
bb2a8b0c 1584static const struct nfsd4_operation nfsd4_ops[];
b591480b 1585
f1c7f79b 1586static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 1587
f9bb94c4 1588/*
57716355 1589 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 1590 *
57716355
BF		 1591 * Also note, enforced elsewhere:
1592 * - SEQUENCE other than as first op results in
1593 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 1594 * - BIND_CONN_TO_SESSION must be the only op in its compound.
1595 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 1596 * - DESTROY_SESSION must be the final operation in a compound, if
1597 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
1598 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 1599 */
57716355 1600static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 1601{
57716355
BF		 1602 struct nfsd4_op *op = &args->ops[0];
1603
1604 /* These ordering requirements don't apply to NFSv4.0: */
1605 if (args->minorversion == 0)
1606 return nfs_ok;
1607 /* This is weird, but OK, not our problem: */
1608 if (args->opcnt == 0)
1609 return nfs_ok;
1610 if (op->status == nfserr_op_illegal)
1611 return nfs_ok;
1612 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
1613 return nfserr_op_not_in_session;
1614 if (op->opnum == OP_SEQUENCE)
1615 return nfs_ok;
1616 if (args->opcnt != 1)
1617 return nfserr_not_only_op;
1618 return nfs_ok;
f9bb94c4
AA		 1619}
1620
f4f9ef4a 1621const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 1622{
1623 return &nfsd4_ops[op->opnum];
1624}
1625
1091006c
BF		 1626bool nfsd4_cache_this_op(struct nfsd4_op *op)
1627{
e372ba60
BF		 1628 if (op->opnum == OP_ILLEGAL)
1629 return false;
c856694e 1630 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 1631}
1632
68d93184
BF		 1633static bool need_wrongsec_check(struct svc_rqst *rqstp)
1634{
1635 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1636 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
1637 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
1638 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 1639 const struct nfsd4_operation *thisd = OPDESC(this);
1640 const struct nfsd4_operation *nextd;
68d93184 1641
68d93184
BF		 1642 /*
1643 * Most ops check wronsec on our own; only the putfh-like ops
1644 * have special rules.
1645 */
1646 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
1647 return false;
1648 /*
1649 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
1650 * put-filehandle operation if we're not going to use the
1651 * result:
1652 */
1653 if (argp->opcnt == resp->opcnt)
1654 return false;
51904b08
BF		 1655 if (next->opnum == OP_ILLEGAL)
1656 return false;
68d93184
BF		 1657 nextd = OPDESC(next);
1658 /*
1659 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
1660 * errors themselves as necessary; others should check for them
1661 * now:
1662 */
1663 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
1664}
1665
2d124dfa
BF		 1666static void svcxdr_init_encode(struct svc_rqst *rqstp,
1667 struct nfsd4_compoundres *resp)
1668{
1669 struct xdr_stream *xdr = &resp->xdr;
1670 struct xdr_buf *buf = &rqstp->rq_res;
1671 struct kvec *head = buf->head;
1672
1673 xdr->buf = buf;
ddd1ea56 1674 xdr->iov = head;
2d124dfa 1675 xdr->p = head->iov_base + head->iov_len;
a5cddc88 1676 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 1677 /* Tail and page_len should be zero at this point: */
1678 buf->len = buf->head[0].iov_len;
2825a7f9 1679 xdr->scratch.iov_len = 0;
05638dc7 1680 xdr->page_ptr = buf->pages - 1;
2825a7f9 1681 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 1682 - rqstp->rq_auth_slack;
2d124dfa
BF		 1683}
1684
1da177e4
LT		 1685/*
1686 * COMPOUND call.
1687 */
7111c66e 1688static __be32
a6beb732 1689nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 1690{
a6beb732
CH		 1691 struct nfsd4_compoundargs *args = rqstp->rq_argp;
1692 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 1693 struct nfsd4_op *op;
e354d571 1694 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 1695 struct svc_fh *current_fh = &cstate->current_fh;
1696 struct svc_fh *save_fh = &cstate->save_fh;
b37ad28b 1697 __be32 status;
1da177e4 1698
2d124dfa 1699 svcxdr_init_encode(rqstp, resp);
4aea24b2 1700 resp->tagp = resp->xdr.p;
1da177e4 1701 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 1702 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 1703 resp->taglen = args->taglen;
1704 resp->tag = args->tag;
1da177e4 1705 resp->rqstp = rqstp;
4daeed25 1706 cstate->minorversion = args->minorversion;
4daeed25
KM		 1707 fh_init(current_fh, NFS4_FHSIZE);
1708 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 1709 /*
1710 * Don't use the deferral mechanism for NFSv4; compounds make it
1711 * too hard to avoid non-idempotency problems.
1712 */
30660e04 1713 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 1714
1715 /*
1716 * According to RFC3010, this takes precedence over all other errors.
1717 */
1718 status = nfserr_minor_vers_mismatch;
35f7a14f 1719 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
1da177e4 1720 goto out;
0078117c
BF		 1721 status = nfserr_resource;
1722 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
1723 goto out;
1da177e4 1724
57716355
BF		 1725 status = nfs41_check_op_ordering(args);
1726 if (status) {
f9bb94c4 1727 op = &args->ops[0];
57716355 1728 op->status = status;
f9bb94c4
AA		 1729 goto encode_op;
1730 }
1731
fff4080b 1732 trace_nfsd_compound(rqstp, args->opcnt);
1da177e4
LT		 1733 while (!status && resp->opcnt < args->opcnt) {
1734 op = &args->ops[resp->opcnt++];
1735
1736 /*
1737 * The XDR decode routines may have pre-set op->status;
1738 * for example, if there is a miscellaneous XDR error
1739 * it will be set to nfserr_bad_xdr.
1740 */
9d313b17
BF		 1741 if (op->status) {
1742 if (op->opnum == OP_OPEN)
1743 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 1744 goto encode_op;
9d313b17 1745 }
1da177e4 1746
4daeed25 1747 if (!current_fh->fh_dentry) {
f4f9ef4a 1748 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 1749 op->status = nfserr_nofilehandle;
1750 goto encode_op;
1751 }
4daeed25 1752 } else if (current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 1753 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 1754 op->status = nfserr_moved;
1da177e4
LT		 1755 goto encode_op;
1756 }
b591480b 1757
2336745e
KM		 1758 fh_clear_wcc(current_fh);
1759
58e7b33a 1760 /* If op is non-idempotent */
f4f9ef4a 1761 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 1762 /*
a8095f7e
BF		 1763 * Don't execute this op if we couldn't encode a
1764 * succesful reply:
1765 */
f4f9ef4a 1766 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 1767 /*
1768 * Plus if there's another operation, make sure
4c69d585
BF		 1769 * we'll have space to at least encode an error:
1770 */
1771 if (resp->opcnt < args->opcnt)
1772 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 1773 op->status = nfsd4_check_resp_size(resp, plen);
1774 }
1775
1776 if (op->status)
1777 goto encode_op;
1778
f4f9ef4a
BF		 1779 if (op->opdesc->op_get_currentstateid)
1780 op->opdesc->op_get_currentstateid(cstate, &op->u);
1781 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 1782
9a307403
BF		 1783 /* Only from SEQUENCE */
1784 if (cstate->status == nfserr_replay_cache) {
1785 dprintk("%s NFS4.1 replay from cache\n", __func__);
1786 status = op->status;
1787 goto out;
1788 }
8b70484c 1789 if (!op->status) {
f4f9ef4a
BF		 1790 if (op->opdesc->op_set_currentstateid)
1791 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 1792
f4f9ef4a 1793 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 1794 clear_current_stateid(cstate);
8b70484c
TM		 1795
1796 if (need_wrongsec_check(rqstp))
4daeed25 1797 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 1798 }
1da177e4 1799encode_op:
a90b061c 1800 if (op->status == nfserr_replay_me) {
a4f1706a 1801 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 1802 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 1803 status = op->status = op->replay->rp_status;
1804 } else {
1805 nfsd4_encode_operation(resp, op);
1806 status = op->status;
1807 }
0407717d 1808
fff4080b
CL		 1809 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
1810 nfsd4_op_name(op->opnum));
0407717d 1811
58fb12e6 1812 nfsd4_cstate_clear_replay(cstate);
e2b20950 1813 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 1814 }
1815
4daeed25
KM		 1816 cstate->status = status;
1817 fh_put(current_fh);
1818 fh_put(save_fh);
1819 BUG_ON(cstate->replay_owner);
1da177e4 1820out:
2f425878 1821 /* Reset deferral mechanism for RPC deferrals */
30660e04 1822 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 1823 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 1824 return status;
1825}
1826
58e7b33a
MJ		 1827#define op_encode_hdr_size (2)
1828#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
1829#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
1830#define op_encode_change_info_maxsz (5)
1831#define nfs4_fattr_bitmap_maxsz (4)
1832
8c7424cf
BF		 1833/* We'll fall back on returning no lockowner if run out of space: */
1834#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 1835#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
1836
1837#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
1838
1839#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
1840#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
1841 op_encode_ace_maxsz)
1842
1843#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
1844
1845static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1846{
1847 return (op_encode_hdr_size) * sizeof(__be32);
1848}
1849
1850static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1851{
1852 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
1853}
1854
2282cd2c
KM		 1855static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1856{
1857 /* ac_supported, ac_resp_access */
1858 return (op_encode_hdr_size + 2)* sizeof(__be32);
1859}
1860
58e7b33a
MJ		 1861static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1862{
1863 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
1864}
1865
1866static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1867{
1868 return (op_encode_hdr_size + op_encode_change_info_maxsz
1869 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1870}
1871
b86cef60
BF		 1872/*
1873 * Note since this is an idempotent operation we won't insist on failing
1874 * the op prematurely if the estimate is too large. We may turn off splice
1875 * reads unnecessarily.
1876 */
1877static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
1878 struct nfsd4_op *op)
1879{
1880 u32 *bmap = op->u.getattr.ga_bmval;
1881 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
1882 u32 ret = 0;
1883
1884 if (bmap0 & FATTR4_WORD0_ACL)
1885 return svc_max_payload(rqstp);
1886 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
1887 return svc_max_payload(rqstp);
1888
1889 if (bmap1 & FATTR4_WORD1_OWNER) {
1890 ret += IDMAP_NAMESZ + 4;
1891 bmap1 &= ~FATTR4_WORD1_OWNER;
1892 }
1893 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
1894 ret += IDMAP_NAMESZ + 4;
1895 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
1896 }
1897 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
1898 ret += NFS4_FHSIZE + 4;
1899 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
1900 }
1901 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 1902 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 1903 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
1904 }
1905 /*
1906 * Largest of remaining attributes are 16 bytes (e.g.,
1907 * supported_attributes)
1908 */
1909 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
1910 /* bitmask, length */
1911 ret += 20;
1912 return ret;
1913}
1914
2282cd2c
KM		 1915static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1916{
1917 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
1918}
1919
58e7b33a
MJ		 1920static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1921{
1922 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1923 * sizeof(__be32);
1924}
1925
1926static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1927{
1928 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
1929 * sizeof(__be32);
1930}
1931
1932static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1933{
1934 return (op_encode_hdr_size + op_encode_stateid_maxsz
1935 + op_encode_change_info_maxsz + 1
1936 + nfs4_fattr_bitmap_maxsz
1937 + op_encode_delegation_maxsz) * sizeof(__be32);
1938}
1939
1940static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1941{
1942 u32 maxcount = 0, rlen = 0;
1943
1944 maxcount = svc_max_payload(rqstp);
3c7aa15d 1945 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 1946
622f560e 1947 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1948}
1949
1950static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1951{
3c7aa15d 1952 u32 maxcount = 0, rlen = 0;
58e7b33a 1953
3c7aa15d
KM		 1954 maxcount = svc_max_payload(rqstp);
1955 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 1956
561f0ed4
BF		 1957 return (op_encode_hdr_size + op_encode_verifier_maxsz +
1958 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 1959}
1960
2282cd2c
KM		 1961static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1962{
1963 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
1964}
1965
58e7b33a
MJ		 1966static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1967{
1968 return (op_encode_hdr_size + op_encode_change_info_maxsz)
1969 * sizeof(__be32);
1970}
1971
1972static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1973{
1974 return (op_encode_hdr_size + op_encode_change_info_maxsz
1975 + op_encode_change_info_maxsz) * sizeof(__be32);
1976}
1977
ccae70a9
BF		 1978static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
1979 struct nfsd4_op *op)
1980{
d1d84c96
BF		 1981 return (op_encode_hdr_size
1982 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 1983}
1984
2282cd2c
KM		 1985static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1986{
1987 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
1988 * sizeof(__be32);
1989}
1990
58e7b33a
MJ		 1991static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1992{
1993 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
1994}
1995
2282cd2c
KM		 1996static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
1997{
1998 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
1999 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2000}
2001
58e7b33a
MJ		 2002static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2003{
480efaee
BF		 2004 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2005 sizeof(__be32);
58e7b33a
MJ		 2006}
2007
2008static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2009{
f34e432b 2010 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2011}
2012
2013static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2014{
2015 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2016 1 + 1 + /* eir_flags, spr_how */\
2017 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2018 2 + /*eir_server_owner.so_minor_id */\
2019 /* eir_server_owner.so_major_id<> */\
2020 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2021 /* eir_server_scope<> */\
2022 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2023 1 + /* eir_server_impl_id array length */\
2024 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2025}
2026
2027static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2028{
2029 return (op_encode_hdr_size + \
2030 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2031 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2032}
2033
2034static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2035{
2036 return (op_encode_hdr_size + \
2037 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2038 2 + /* csr_sequence, csr_flags */\
2039 op_encode_channel_attrs_maxsz + \
2040 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2041}
2042
29ae7f9d
AS		 2043static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2044{
2045 return (op_encode_hdr_size +
2046 1 /* wr_callback */ +
2047 op_encode_stateid_maxsz /* wr_callback */ +
2048 2 /* wr_count */ +
2049 1 /* wr_committed */ +
2050 op_encode_verifier_maxsz +
2051 1 /* cr_consecutive */ +
2052 1 /* cr_synchronous */) * sizeof(__be32);
2053}
2054
9cf514cc 2055#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2056static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2057{
2058 u32 maxcount = 0, rlen = 0;
2059
2060 maxcount = svc_max_payload(rqstp);
2061 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2062
2063 return (op_encode_hdr_size +
2064 1 /* gd_layout_type*/ +
2065 XDR_QUADLEN(rlen) +
2066 2 /* gd_notify_types */) * sizeof(__be32);
2067}
2068
9cf514cc
CH		 2069/*
2070 * At this stage we don't really know what layout driver will handle the request,
2071 * so we need to define an arbitrary upper bound here.
2072 */
2073#define MAX_LAYOUT_SIZE 128
2074static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2075{
2076 return (op_encode_hdr_size +
2077 1 /* logr_return_on_close */ +
2078 op_encode_stateid_maxsz +
2079 1 /* nr of layouts */ +
2080 MAX_LAYOUT_SIZE) * sizeof(__be32);
2081}
2082
2083static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2084{
2085 return (op_encode_hdr_size +
2086 1 /* locr_newsize */ +
2087 2 /* ns_size */) * sizeof(__be32);
2088}
2089
2090static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2091{
2092 return (op_encode_hdr_size +
2093 1 /* lrs_stateid */ +
2094 op_encode_stateid_maxsz) * sizeof(__be32);
2095}
2096#endif /* CONFIG_NFSD_PNFS */
2097
2282cd2c
KM		 2098
2099static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2100{
2101 return (op_encode_hdr_size + 3) * sizeof(__be32);
2102}
2103
bb2a8b0c 2104static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2105 [OP_ACCESS] = {
eb69853d 2106 .op_func = nfsd4_access,
b001a1b6 2107 .op_name = "OP_ACCESS",
1c122638 2108 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2109 },
2110 [OP_CLOSE] = {
eb69853d 2111 .op_func = nfsd4_close,
58e7b33a 2112 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2113 .op_name = "OP_CLOSE",
1c122638 2114 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2115 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2116 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2117 },
2118 [OP_COMMIT] = {
eb69853d 2119 .op_func = nfsd4_commit,
58e7b33a 2120 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2121 .op_name = "OP_COMMIT",
1c122638 2122 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2123 },
2124 [OP_CREATE] = {
eb69853d 2125 .op_func = nfsd4_create,
d1471053 2126 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2127 .op_name = "OP_CREATE",
1c122638 2128 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2129 },
2130 [OP_DELEGRETURN] = {
eb69853d 2131 .op_func = nfsd4_delegreturn,
58e7b33a 2132 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2133 .op_name = "OP_DELEGRETURN",
58e7b33a 2134 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2135 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2136 },
2137 [OP_GETATTR] = {
eb69853d 2138 .op_func = nfsd4_getattr,
eeac294e 2139 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2140 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2141 .op_name = "OP_GETATTR",
b591480b
BF		 2142 },
2143 [OP_GETFH] = {
eb69853d 2144 .op_func = nfsd4_getfh,
b001a1b6 2145 .op_name = "OP_GETFH",
1c122638 2146 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2147 },
2148 [OP_LINK] = {
eb69853d 2149 .op_func = nfsd4_link,
c856694e
BF		 2150 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2151 | OP_CACHEME,
b001a1b6 2152 .op_name = "OP_LINK",
1c122638 2153 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2154 },
2155 [OP_LOCK] = {
eb69853d 2156 .op_func = nfsd4_lock,
b7571e4c
BF		 2157 .op_flags = OP_MODIFIES_SOMETHING |
2158 OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2159 .op_name = "OP_LOCK",
1c122638 2160 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2161 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2162 },
2163 [OP_LOCKT] = {
eb69853d 2164 .op_func = nfsd4_lockt,
b7571e4c 2165 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2166 .op_name = "OP_LOCKT",
1c122638 2167 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2168 },
2169 [OP_LOCKU] = {
eb69853d 2170 .op_func = nfsd4_locku,
58e7b33a 2171 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2172 .op_name = "OP_LOCKU",
1c122638 2173 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2174 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2175 },
2176 [OP_LOOKUP] = {
eb69853d 2177 .op_func = nfsd4_lookup,
d1471053 2178 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2179 .op_name = "OP_LOOKUP",
1c122638 2180 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2181 },
2182 [OP_LOOKUPP] = {
eb69853d 2183 .op_func = nfsd4_lookupp,
d1471053 2184 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2185 .op_name = "OP_LOOKUPP",
1c122638 2186 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2187 },
2188 [OP_NVERIFY] = {
eb69853d 2189 .op_func = nfsd4_nverify,
b001a1b6 2190 .op_name = "OP_NVERIFY",
1c122638 2191 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2192 },
2193 [OP_OPEN] = {
eb69853d 2194 .op_func = nfsd4_open,
58e7b33a 2195 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2196 .op_name = "OP_OPEN",
1c122638 2197 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2198 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2199 },
2200 [OP_OPEN_CONFIRM] = {
eb69853d 2201 .op_func = nfsd4_open_confirm,
58e7b33a 2202 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2203 .op_name = "OP_OPEN_CONFIRM",
1c122638 2204 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2205 },
2206 [OP_OPEN_DOWNGRADE] = {
eb69853d 2207 .op_func = nfsd4_open_downgrade,
58e7b33a 2208 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2209 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2210 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2211 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2212 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2213 },
2214 [OP_PUTFH] = {
eb69853d 2215 .op_func = nfsd4_putfh,
68d93184 2216 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2217 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2218 .op_name = "OP_PUTFH",
1c122638 2219 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2220 },
eeac294e 2221 [OP_PUTPUBFH] = {
eb69853d 2222 .op_func = nfsd4_putrootfh,
68d93184 2223 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2224 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2225 .op_name = "OP_PUTPUBFH",
1c122638 2226 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2227 },
b591480b 2228 [OP_PUTROOTFH] = {
eb69853d 2229 .op_func = nfsd4_putrootfh,
68d93184 2230 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2231 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2232 .op_name = "OP_PUTROOTFH",
1c122638 2233 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2234 },
2235 [OP_READ] = {
eb69853d 2236 .op_func = nfsd4_read,
34b1744c 2237 .op_release = nfsd4_read_release,
b001a1b6 2238 .op_name = "OP_READ",
1c122638 2239 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2240 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2241 },
2242 [OP_READDIR] = {
eb69853d 2243 .op_func = nfsd4_readdir,
b001a1b6 2244 .op_name = "OP_READDIR",
1c122638 2245 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2246 },
2247 [OP_READLINK] = {
eb69853d 2248 .op_func = nfsd4_readlink,
b001a1b6 2249 .op_name = "OP_READLINK",
1c122638 2250 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2251 },
2252 [OP_REMOVE] = {
eb69853d 2253 .op_func = nfsd4_remove,
c856694e 2254 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2255 .op_name = "OP_REMOVE",
1c122638 2256 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2257 },
2258 [OP_RENAME] = {
eb69853d 2259 .op_func = nfsd4_rename,
c856694e 2260 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2261 .op_name = "OP_RENAME",
1c122638 2262 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2263 },
2264 [OP_RENEW] = {
eb69853d 2265 .op_func = nfsd4_renew,
58e7b33a
MJ		 2266 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2267 | OP_MODIFIES_SOMETHING,
b001a1b6 2268 .op_name = "OP_RENEW",
1c122638 2269 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2270
b591480b
BF		 2271 },
2272 [OP_RESTOREFH] = {
eb69853d 2273 .op_func = nfsd4_restorefh,
68d93184 2274 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2275 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2276 .op_name = "OP_RESTOREFH",
1c122638 2277 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2278 },
2279 [OP_SAVEFH] = {
eb69853d 2280 .op_func = nfsd4_savefh,
58e7b33a 2281 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2282 .op_name = "OP_SAVEFH",
1c122638 2283 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2284 },
dcb488a3 2285 [OP_SECINFO] = {
eb69853d 2286 .op_func = nfsd4_secinfo,
34b1744c 2287 .op_release = nfsd4_secinfo_release,
68d93184 2288 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2289 .op_name = "OP_SECINFO",
1c122638 2290 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2291 },
b591480b 2292 [OP_SETATTR] = {
eb69853d 2293 .op_func = nfsd4_setattr,
b001a1b6 2294 .op_name = "OP_SETATTR",
b7571e4c
BF		 2295 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2296 | OP_NONTRIVIAL_ERROR_ENCODE,
1c122638 2297 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 2298 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 2299 },
2300 [OP_SETCLIENTID] = {
eb69853d 2301 .op_func = nfsd4_setclientid,
58e7b33a 2302 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
b7571e4c
BF		 2303 | OP_MODIFIES_SOMETHING | OP_CACHEME
2304 | OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2305 .op_name = "OP_SETCLIENTID",
1c122638 2306 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 2307 },
2308 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 2309 .op_func = nfsd4_setclientid_confirm,
58e7b33a 2310 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2311 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2312 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 2313 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2314 },
2315 [OP_VERIFY] = {
eb69853d 2316 .op_func = nfsd4_verify,
b001a1b6 2317 .op_name = "OP_VERIFY",
1c122638 2318 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2319 },
2320 [OP_WRITE] = {
eb69853d 2321 .op_func = nfsd4_write,
c856694e 2322 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2323 .op_name = "OP_WRITE",
1c122638 2324 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 2325 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 2326 },
2327 [OP_RELEASE_LOCKOWNER] = {
eb69853d 2328 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 2329 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2330 | OP_MODIFIES_SOMETHING,
b001a1b6 2331 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 2332 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2333 },
069b6ad4
AA		 2334
2335 /* NFSv4.1 operations */
2336 [OP_EXCHANGE_ID] = {
eb69853d 2337 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 2338 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2339 | OP_MODIFIES_SOMETHING,
069b6ad4 2340 .op_name = "OP_EXCHANGE_ID",
1c122638 2341 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 2342 },
cb73a9f4 2343 [OP_BACKCHANNEL_CTL] = {
eb69853d 2344 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 2345 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2346 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 2347 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 2348 },
1d1bc8f2 2349 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 2350 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2351 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2352 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2353 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 2354 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2355 },
069b6ad4 2356 [OP_CREATE_SESSION] = {
eb69853d 2357 .op_func = nfsd4_create_session,
58e7b33a
MJ		 2358 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2359 | OP_MODIFIES_SOMETHING,
069b6ad4 2360 .op_name = "OP_CREATE_SESSION",
1c122638 2361 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 2362 },
2363 [OP_DESTROY_SESSION] = {
eb69853d 2364 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 2365 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2366 | OP_MODIFIES_SOMETHING,
069b6ad4 2367 .op_name = "OP_DESTROY_SESSION",
1c122638 2368 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 2369 },
2370 [OP_SEQUENCE] = {
eb69853d 2371 .op_func = nfsd4_sequence,
f9bb94c4 2372 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2373 .op_name = "OP_SEQUENCE",
1c122638 2374 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 2375 },
094b5d74 2376 [OP_DESTROY_CLIENTID] = {
eb69853d 2377 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 2378 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2379 | OP_MODIFIES_SOMETHING,
094b5d74 2380 .op_name = "OP_DESTROY_CLIENTID",
1c122638 2381 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 2382 },
4dc6ec00 2383 [OP_RECLAIM_COMPLETE] = {
eb69853d 2384 .op_func = nfsd4_reclaim_complete,
58e7b33a 2385 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2386 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 2387 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 2388 },
04f4ad16 2389 [OP_SECINFO_NO_NAME] = {
eb69853d 2390 .op_func = nfsd4_secinfo_no_name,
ec572b9e 2391 .op_release = nfsd4_secinfo_no_name_release,
68d93184 2392 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2393 .op_name = "OP_SECINFO_NO_NAME",
1c122638 2394 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 2395 },
17456804 2396 [OP_TEST_STATEID] = {
eb69853d 2397 .op_func = nfsd4_test_stateid,
17456804
BS		 2398 .op_flags = ALLOWED_WITHOUT_FH,
2399 .op_name = "OP_TEST_STATEID",
1c122638 2400 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 2401 },
e1ca12df 2402 [OP_FREE_STATEID] = {
eb69853d 2403 .op_func = nfsd4_free_stateid,
58e7b33a 2404 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 2405 .op_name = "OP_FREE_STATEID",
57832e7b 2406 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 2407 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 2408 },
9cf514cc
CH		 2409#ifdef CONFIG_NFSD_PNFS
2410 [OP_GETDEVICEINFO] = {
eb69853d 2411 .op_func = nfsd4_getdeviceinfo,
34b1744c 2412 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 2413 .op_flags = ALLOWED_WITHOUT_FH,
2414 .op_name = "OP_GETDEVICEINFO",
1c122638 2415 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 2416 },
2417 [OP_LAYOUTGET] = {
eb69853d 2418 .op_func = nfsd4_layoutget,
34b1744c 2419 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 2420 .op_flags = OP_MODIFIES_SOMETHING,
2421 .op_name = "OP_LAYOUTGET",
1c122638 2422 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 2423 },
2424 [OP_LAYOUTCOMMIT] = {
eb69853d 2425 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 2426 .op_flags = OP_MODIFIES_SOMETHING,
2427 .op_name = "OP_LAYOUTCOMMIT",
1c122638 2428 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 2429 },
2430 [OP_LAYOUTRETURN] = {
eb69853d 2431 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 2432 .op_flags = OP_MODIFIES_SOMETHING,
2433 .op_name = "OP_LAYOUTRETURN",
1c122638 2434 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 2435 },
2436#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 2437
2438 /* NFSv4.2 operations */
95d871f0 2439 [OP_ALLOCATE] = {
eb69853d 2440 .op_func = nfsd4_allocate,
95d871f0
AS		 2441 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2442 .op_name = "OP_ALLOCATE",
1c122638 2443 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 2444 },
b0cb9085 2445 [OP_DEALLOCATE] = {
eb69853d 2446 .op_func = nfsd4_deallocate,
b0cb9085
AS		 2447 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2448 .op_name = "OP_DEALLOCATE",
1c122638 2449 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 2450 },
ffa0160a 2451 [OP_CLONE] = {
eb69853d 2452 .op_func = nfsd4_clone,
ffa0160a
CH		 2453 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2454 .op_name = "OP_CLONE",
1c122638 2455 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 2456 },
29ae7f9d 2457 [OP_COPY] = {
eb69853d 2458 .op_func = nfsd4_copy,
29ae7f9d
AS		 2459 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
2460 .op_name = "OP_COPY",
1c122638 2461 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 2462 },
24bab491 2463 [OP_SEEK] = {
eb69853d 2464 .op_func = nfsd4_seek,
24bab491 2465 .op_name = "OP_SEEK",
1c122638 2466 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 2467 },
b591480b
BF		 2468};
2469
ed941643
AE		 2470/**
2471 * nfsd4_spo_must_allow - Determine if the compound op contains an
2472 * operation that is allowed to be sent with machine credentials
2473 *
2474 * @rqstp: a pointer to the struct svc_rqst
2475 *
2476 * Checks to see if the compound contains a spo_must_allow op
2477 * and confirms that it was sent with the proper machine creds.
2478 */
2479
2480bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
2481{
2482 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2483 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2484 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2485 struct nfsd4_compound_state *cstate = &resp->cstate;
2486 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
2487 u32 opiter;
2488
2489 if (!cstate->minorversion)
2490 return false;
2491
2492 if (cstate->spo_must_allowed == true)
2493 return true;
2494
2495 opiter = resp->opcnt;
2496 while (opiter < argp->opcnt) {
2497 this = &argp->ops[opiter++];
2498 if (test_bit(this->opnum, allow->u.longs) &&
2499 cstate->clp->cl_mach_cred &&
2500 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
2501 cstate->spo_must_allowed = true;
2502 return true;
2503 }
2504 }
2505 cstate->spo_must_allowed = false;
2506 return false;
2507}
2508
4f0cefbf
BF		 2509int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
2510{
05b7278d 2511 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 2512 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 2513
2514 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
2515 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 2516}
2517
07d1f802
BF		 2518void warn_on_nonidempotent_op(struct nfsd4_op *op)
2519{
2520 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
2521 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
2522 op->opnum, nfsd4_op_name(op->opnum));
2523 WARN_ON_ONCE(1);
2524 }
2525}
2526
f1c7f79b 2527static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 2528{
2529 if (opnum < ARRAY_SIZE(nfsd4_ops))
2530 return nfsd4_ops[opnum].op_name;
2531 return "unknown_operation";
2532}
2533
1da177e4 2534#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 2535struct nfsd4_voidargs { int dummy; };
2536
860bda29 2537static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 2538 [NFSPROC4_NULL] = {
f7235b6b 2539 .pc_func = nfsd4_proc_null,
63f8de37 2540 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 2541 .pc_argsize = sizeof(struct nfsd4_voidargs),
2542 .pc_ressize = sizeof(struct nfsd4_voidres),
2543 .pc_cachetype = RC_NOCACHE,
2544 .pc_xdrressize = 1,
2545 },
2546 [NFSPROC4_COMPOUND] = {
f7235b6b 2547 .pc_func = nfsd4_proc_compound,
026fec7e 2548 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 2549 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 2550 .pc_argsize = sizeof(struct nfsd4_compoundargs),
2551 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 2552 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 2553 .pc_cachetype = RC_NOCACHE,
2554 .pc_xdrressize = NFSD_BUFSIZE/4,
2555 },
1da177e4
LT		 2556};
2557
7fd38af9 2558static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 2559const struct svc_version nfsd_version4 = {
5283b03e
JL		 2560 .vs_vers = 4,
2561 .vs_nproc = 2,
2562 .vs_proc = nfsd_procedures4,
7fd38af9 2563 .vs_count = nfsd_count3,
5283b03e
JL		 2564 .vs_dispatch = nfsd_dispatch,
2565 .vs_xdrsize = NFS4_SVC_XDRSIZE,
2566 .vs_rpcb_optnl = true,
2567 .vs_need_cong_ctrl = true,
1da177e4
LT		 2568};
2569
2570/*
2571 * Local variables:
2572 * c-basic-offset: 8
2573 * End:
2574 */
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