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nfsd: Fix typo "accesible"
[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 */
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>
e0639dc5 39#include <linux/kthread.h>
624322f1 40#include <linux/sunrpc/addr.h>
0cfcd405 41#include <linux/nfs_ssc.h>
1da177e4 42
58e7b33a 43#include "idmap.h"
9a74af21
BH		 44#include "cache.h"
45#include "xdr4.h"
0a3adade 46#include "vfs.h"
8b70484c 47#include "current_stateid.h"
3320fef1 48#include "netns.h"
4ac7249e 49#include "acl.h"
9cf514cc 50#include "pnfs.h"
31ef83dc 51#include "trace.h"
1da177e4 52
d6c9e436
CL		 53static bool inter_copy_offload_enable;
54module_param(inter_copy_offload_enable, bool, 0644);
55MODULE_PARM_DESC(inter_copy_offload_enable,
56 "Enable inter server to server copy offload. Default: false");
57
18032ca0
DQ		 58#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
59#include <linux/security.h>
60
61static inline void
62nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
63{
2b0143b5 64 struct inode *inode = d_inode(resfh->fh_dentry);
18032ca0
DQ		 65 int status;
66
5955102c 67 inode_lock(inode);
18032ca0
DQ		 68 status = security_inode_setsecctx(resfh->fh_dentry,
69 label->data, label->len);
5955102c 70 inode_unlock(inode);
18032ca0
DQ		 71
72 if (status)
73 /*
74 * XXX: We should really fail the whole open, but we may
75 * already have created a new file, so it may be too
76 * late. For now this seems the least of evils:
77 */
78 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
79
80 return;
81}
82#else
83static inline void
84nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
85{ }
86#endif
87
1da177e4
LT		 88#define NFSDDBG_FACILITY NFSDDBG_PROC
89
3c8e0316
YZ		 90static u32 nfsd_attrmask[] = {
91 NFSD_WRITEABLE_ATTRS_WORD0,
92 NFSD_WRITEABLE_ATTRS_WORD1,
93 NFSD_WRITEABLE_ATTRS_WORD2
94};
95
96static u32 nfsd41_ex_attrmask[] = {
97 NFSD_SUPPATTR_EXCLCREAT_WORD0,
98 NFSD_SUPPATTR_EXCLCREAT_WORD1,
99 NFSD_SUPPATTR_EXCLCREAT_WORD2
100};
101
102static __be32
103check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
104 u32 *bmval, u32 *writable)
105{
106 struct dentry *dentry = cstate->current_fh.fh_dentry;
32ddd944 107 struct svc_export *exp = cstate->current_fh.fh_export;
3c8e0316 108
916d2d84 109 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
3c8e0316 110 return nfserr_attrnotsupp;
916d2d84
BF		 111 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
112 return nfserr_attrnotsupp;
32ddd944
BF		 113 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
114 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
115 return nfserr_attrnotsupp;
916d2d84
BF		 116 if (writable && !bmval_is_subset(bmval, writable))
117 return nfserr_inval;
47057abd
AG		 118 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
119 (bmval[1] & FATTR4_WORD1_MODE))
120 return nfserr_inval;
3c8e0316
YZ		 121 return nfs_ok;
122}
123
124static __be32
125nfsd4_check_open_attributes(struct svc_rqst *rqstp,
126 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
127{
128 __be32 status = nfs_ok;
129
130 if (open->op_create == NFS4_OPEN_CREATE) {
131 if (open->op_createmode == NFS4_CREATE_UNCHECKED
132 || open->op_createmode == NFS4_CREATE_GUARDED)
133 status = check_attr_support(rqstp, cstate,
134 open->op_bmval, nfsd_attrmask);
135 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
136 status = check_attr_support(rqstp, cstate,
137 open->op_bmval, nfsd41_ex_attrmask);
138 }
139
140 return status;
141}
142
9208faf2
YZ		 143static int
144is_create_with_attrs(struct nfsd4_open *open)
145{
146 return open->op_create == NFS4_OPEN_CREATE
147 && (open->op_createmode == NFS4_CREATE_UNCHECKED
148 || open->op_createmode == NFS4_CREATE_GUARDED
149 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
150}
151
152/*
153 * if error occurs when setting the acl, just clear the acl bit
154 * in the returned attr bitmap.
155 */
156static void
157do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
158 struct nfs4_acl *acl, u32 *bmval)
159{
160 __be32 status;
161
162 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
163 if (status)
164 /*
165 * We should probably fail the whole open at this point,
166 * but we've already created the file, so it's too late;
167 * So this seems the least of evils:
168 */
169 bmval[0] &= ~FATTR4_WORD0_ACL;
170}
171
1da177e4
LT		 172static inline void
173fh_dup2(struct svc_fh *dst, struct svc_fh *src)
174{
175 fh_put(dst);
176 dget(src->fh_dentry);
177 if (src->fh_export)
bf18f163 178 exp_get(src->fh_export);
1da177e4
LT		 179 *dst = *src;
180}
181
b37ad28b 182static __be32
dc730e17 183do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
1da177e4 184{
b37ad28b 185 __be32 status;
1da177e4
LT		 186
187 if (open->op_truncate &&
188 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
189 return nfserr_inval;
190
a043226b
BF		 191 accmode |= NFSD_MAY_READ_IF_EXEC;
192
1da177e4 193 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
8837abca 194 accmode |= NFSD_MAY_READ;
9801d8a3 195 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
8837abca 196 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
57ecb34f 197 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
8837abca 198 accmode |= NFSD_MAY_WRITE;
1da177e4
LT		 199
200 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
201
202 return status;
203}
204
aadab6c6
BF		 205static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
206{
2b0143b5 207 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
aadab6c6
BF		 208
209 if (S_ISREG(mode))
210 return nfs_ok;
211 if (S_ISDIR(mode))
212 return nfserr_isdir;
213 /*
214 * Using err_symlink as our catch-all case may look odd; but
215 * there's no other obvious error for this case in 4.0, and we
216 * happen to know that it will cause the linux v4 client to do
217 * the right thing on attempts to open something other than a
218 * regular file.
219 */
220 return nfserr_symlink;
221}
222
bbc9c36c
BF		 223static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
224{
225 if (nfsd4_has_session(cstate))
226 return;
227 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
228 &resfh->fh_handle);
229}
230
b37ad28b 231static __be32
c0e6bee4 232do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
1da177e4 233{
bbc9c36c 234 struct svc_fh *current_fh = &cstate->current_fh;
7007c90f 235 int accmode;
b37ad28b 236 __be32 status;
1da177e4 237
c0e6bee4
BF		 238 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
239 if (!*resfh)
59deeb9e 240 return nfserr_jukebox;
c0e6bee4 241 fh_init(*resfh, NFS4_FHSIZE);
500c2481 242 open->op_truncate = false;
1da177e4
LT		 243
244 if (open->op_create) {
79fb54ab
BH		 245 /* FIXME: check session persistence and pnfs flags.
246 * The nfsv4.1 spec requires the following semantics:
247 *
248 * Persistent | pNFS | Server REQUIRED | Client Allowed
249 * Reply Cache | server | |
250 * -------------+--------+-----------------+--------------------
251 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
252 * | | | (SHOULD)
253 * | | and EXCLUSIVE4 | or EXCLUSIVE4
254 * | | | (SHOULD NOT)
255 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
256 * yes | no | GUARDED4 | GUARDED4
257 * yes | yes | GUARDED4 | GUARDED4
258 */
259
1da177e4
LT		 260 /*
261 * Note: create modes (UNCHECKED,GUARDED...) are the same
ac6721a1 262 * in NFSv4 as in v3 except EXCLUSIVE4_1.
1da177e4 263 */
880a3a53 264 current->fs->umask = open->op_umask;
1708e50b
CL		 265 status = do_nfsd_create(rqstp, current_fh, open->op_fname,
266 open->op_fnamelen, &open->op_iattr,
c0e6bee4 267 *resfh, open->op_createmode,
749997e5 268 (u32 *)open->op_verf.data,
856121b2 269 &open->op_truncate, &open->op_created);
880a3a53 270 current->fs->umask = 0;
749997e5 271
18032ca0 272 if (!status && open->op_label.len)
c0e6bee4 273 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
18032ca0 274
99f88726 275 /*
ead8fb8c
KM		 276 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
277 * use the returned bitmask to indicate which attributes
278 * we used to store the verifier:
749997e5 279 */
ead8fb8c
KM		 280 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
281 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
282 FATTR4_WORD1_TIME_MODIFY);
4335723e
BF		 283 } else
284 /*
285 * Note this may exit with the parent still locked.
286 * We will hold the lock until nfsd4_open's final
287 * lookup, to prevent renames or unlinks until we've had
288 * a chance to an acquire a delegation if appropriate.
289 */
1da177e4 290 status = nfsd_lookup(rqstp, current_fh,
1708e50b 291 open->op_fname, open->op_fnamelen, *resfh);
9dc4e6c4
BF		 292 if (status)
293 goto out;
c0e6bee4 294 status = nfsd_check_obj_isreg(*resfh);
af85852d
BF		 295 if (status)
296 goto out;
1da177e4 297
9208faf2 298 if (is_create_with_attrs(open) && open->op_acl != NULL)
c0e6bee4 299 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
9208faf2 300
c0e6bee4 301 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
7007c90f 302 accmode = NFSD_MAY_NOP;
89f6c336
BF		 303 if (open->op_created ||
304 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
7007c90f 305 accmode |= NFSD_MAY_OWNER_OVERRIDE;
c0e6bee4 306 status = do_open_permission(rqstp, *resfh, open, accmode);
41fd1e42 307 set_change_info(&open->op_cinfo, current_fh);
af85852d 308out:
1da177e4
LT		 309 return status;
310}
311
b37ad28b 312static __be32
bbc9c36c 313do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
1da177e4 314{
bbc9c36c 315 struct svc_fh *current_fh = &cstate->current_fh;
b37ad28b 316 __be32 status;
9f415eb2 317 int accmode = 0;
1da177e4 318
1da177e4
LT		 319 /* We don't know the target directory, and therefore can not
320 * set the change info
321 */
322
323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
324
bbc9c36c 325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
1da177e4
LT		 326
327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
328 (open->op_iattr.ia_size == 0);
9f415eb2
BF		 329 /*
330 * In the delegation case, the client is telling us about an
331 * open that it *already* performed locally, some time ago. We
332 * should let it succeed now if possible.
333 *
334 * In the case of a CLAIM_FH open, on the other hand, the client
335 * may be counting on us to enforce permissions (the Linux 4.1
336 * client uses this for normal opens, for example).
337 */
338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
339 accmode = NFSD_MAY_OWNER_OVERRIDE;
1da177e4 340
9f415eb2 341 status = do_open_permission(rqstp, current_fh, open, accmode);
1da177e4
LT		 342
343 return status;
344}
345
60adfc50
AA		 346static void
347copy_clientid(clientid_t *clid, struct nfsd4_session *session)
348{
349 struct nfsd4_sessionid *sid =
350 (struct nfsd4_sessionid *)session->se_sessionid.data;
351
352 clid->cl_boot = sid->clientid.cl_boot;
353 clid->cl_id = sid->clientid.cl_id;
354}
1da177e4 355
7191155b 356static __be32
ca364317 357nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 358 union nfsd4_op_u *u)
1da177e4 359{
eb69853d 360 struct nfsd4_open *open = &u->open;
b37ad28b 361 __be32 status;
c0e6bee4 362 struct svc_fh *resfh = NULL;
3320fef1
SK		 363 struct net *net = SVC_NET(rqstp);
364 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
03f318ca 365 bool reclaim = false;
6668958f 366
fe0750e5 367 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1708e50b 368 (int)open->op_fnamelen, open->op_fname,
fe0750e5 369 open->op_openowner);
1da177e4 370
1da177e4
LT		 371 /* This check required by spec. */
372 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
373 return nfserr_inval;
374
500c2481 375 open->op_created = false;
ab1350b2
MJ		 376 /*
377 * RFC5661 18.51.3
378 * Before RECLAIM_COMPLETE done, server should deny new lock
379 */
380 if (nfsd4_has_session(cstate) &&
ec59659b 381 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags) &&
ab1350b2
MJ		 382 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
383 return nfserr_grace;
384
60adfc50
AA		 385 if (nfsd4_has_session(cstate))
386 copy_clientid(&open->op_clientid, cstate->session);
387
1da177e4 388 /* check seqid for replay. set nfs4_owner */
6cd22668 389 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 390 if (status == nfserr_replay_me) {
fe0750e5 391 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 392 fh_put(&cstate->current_fh);
a4773c08
BF		 393 fh_copy_shallow(&cstate->current_fh.fh_handle,
394 &rp->rp_openfh);
8837abca 395 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 396 if (status)
397 dprintk("nfsd4_open: replay failed"
398 " restoring previous filehandle\n");
399 else
a90b061c 400 status = nfserr_replay_me;
1da177e4
LT		 401 }
402 if (status)
403 goto out;
9d313b17
BF		 404 if (open->op_xdr_error) {
405 status = open->op_xdr_error;
406 goto out;
407 }
fb553c0f 408
3c8e0316
YZ		 409 status = nfsd4_check_open_attributes(rqstp, cstate, open);
410 if (status)
411 goto out;
412
fb553c0f
BF		 413 /* Openowner is now set, so sequence id will get bumped. Now we need
414 * these checks before we do any creates: */
cbd0d51a 415 status = nfserr_grace;
c87fb4a3 416 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 417 goto out;
418 status = nfserr_no_grace;
c87fb4a3 419 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 420 goto out;
fb553c0f 421
1da177e4 422 switch (open->op_claim_type) {
0dd3c192 423 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 424 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 425 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 426 if (status)
427 goto out;
428 break;
429 case NFS4_OPEN_CLAIM_PREVIOUS:
1722b046 430 status = nfs4_check_open_reclaim(cstate->clp);
0cf99b91
MJ		 431 if (status)
432 goto out;
ba5378b6 433 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
03f318ca 434 reclaim = true;
df561f66 435 fallthrough;
8b289b2c
BF		 436 case NFS4_OPEN_CLAIM_FH:
437 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 438 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 439 if (status)
440 goto out;
c0e6bee4 441 resfh = &cstate->current_fh;
1da177e4 442 break;
8b289b2c 443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 444 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 445 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 446 open->op_claim_type);
447 status = nfserr_notsupp;
448 goto out;
449 default:
2fdada03 450 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 451 open->op_claim_type);
452 status = nfserr_inval;
453 goto out;
454 }
455 /*
456 * nfsd4_process_open2() does the actual opening of the file. If
457 * successful, it (1) truncates the file if open->op_truncate was
458 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
459 */
c0e6bee4 460 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 461 WARN(status && open->op_created,
462 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
463 be32_to_cpu(status));
03f318ca
BF		 464 if (reclaim && !status)
465 nn->somebody_reclaimed = true;
1da177e4 466out:
c0e6bee4
BF		 467 if (resfh && resfh != &cstate->current_fh) {
468 fh_dup2(&cstate->current_fh, resfh);
469 fh_put(resfh);
470 kfree(resfh);
471 }
42297899 472 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 473 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 474 return status;
475}
476
9d313b17
BF		 477/*
478 * OPEN is the only seqid-mutating operation whose decoding can fail
479 * with a seqid-mutating error (specifically, decoding of user names in
480 * the attributes). Therefore we have to do some processing to look up
481 * the stateowner so that we can bump the seqid.
482 */
483static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
484{
eb69853d 485 struct nfsd4_open *open = &op->u.open;
9d313b17
BF		 486
487 if (!seqid_mutating_err(ntohl(op->status)))
488 return op->status;
489 if (nfsd4_has_session(cstate))
490 return op->status;
491 open->op_xdr_error = op->status;
eb69853d 492 return nfsd4_open(rqstp, cstate, &op->u);
9d313b17
BF		 493}
494
1da177e4
LT		 495/*
496 * filehandle-manipulating ops.
497 */
7191155b 498static __be32
b591480b 499nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 500 union nfsd4_op_u *u)
1da177e4 501{
eb69853d 502 u->getfh = &cstate->current_fh;
1da177e4
LT		 503 return nfs_ok;
504}
505
7191155b 506static __be32
ca364317 507nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 508 union nfsd4_op_u *u)
1da177e4 509{
eb69853d 510 struct nfsd4_putfh *putfh = &u->putfh;
b9e8638e 511 __be32 ret;
eb69853d 512
ca364317
BF		 513 fh_put(&cstate->current_fh);
514 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
515 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
516 putfh->pf_fhlen);
b9e8638e
OK		 517 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
518#ifdef CONFIG_NFSD_V4_2_INTER_SSC
519 if (ret == nfserr_stale && putfh->no_verify) {
520 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
521 ret = 0;
522 }
523#endif
524 return ret;
1da177e4
LT		 525}
526
7191155b 527static __be32
b591480b 528nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 529 union nfsd4_op_u *u)
1da177e4 530{
b37ad28b 531 __be32 status;
1da177e4 532
ca364317 533 fh_put(&cstate->current_fh);
df547efb 534 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 535 return status;
536}
537
7191155b 538static __be32
b591480b 539nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 540 union nfsd4_op_u *u)
1da177e4 541{
ca364317 542 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 543 return nfserr_restorefh;
544
ca364317 545 fh_dup2(&cstate->current_fh, &cstate->save_fh);
51100d2b 546 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
37c593c5 547 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
51100d2b 548 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
37c593c5 549 }
1da177e4
LT		 550 return nfs_ok;
551}
552
7191155b 553static __be32
b591480b 554nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 555 union nfsd4_op_u *u)
1da177e4 556{
ca364317 557 fh_dup2(&cstate->save_fh, &cstate->current_fh);
51100d2b 558 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
37c593c5 559 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
51100d2b 560 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
37c593c5 561 }
1da177e4
LT		 562 return nfs_ok;
563}
564
565/*
566 * misc nfsv4 ops
567 */
7191155b 568static __be32
ca364317 569nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 570 union nfsd4_op_u *u)
1da177e4 571{
eb69853d 572 struct nfsd4_access *access = &u->access;
c11d7fd1 573 u32 access_full;
eb69853d 574
c11d7fd1
FL		 575 access_full = NFS3_ACCESS_FULL;
576 if (cstate->minorversion >= 2)
577 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
578 NFS4_ACCESS_XAWRITE;
579
580 if (access->ac_req_access & ~access_full)
1da177e4
LT		 581 return nfserr_inval;
582
583 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 584 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
585 &access->ac_supported);
1da177e4
LT		 586}
587
b9c0ef85 588static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1 589{
27c438f5 590 __be32 *verf = (__be32 *)verifier->data;
ab4684d1 591
27c438f5
TM		 592 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
593
594 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
ab4684d1
CL		 595}
596
7191155b 597static __be32
ca364317 598nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 599 union nfsd4_op_u *u)
1da177e4 600{
eb69853d
CH		 601 struct nfsd4_commit *commit = &u->commit;
602
75c096f7 603 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
524ff1af
TM		 604 commit->co_count,
605 (__be32 *)commit->co_verf.data);
1da177e4
LT		 606}
607
b37ad28b 608static __be32
ca364317 609nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 610 union nfsd4_op_u *u)
1da177e4 611{
eb69853d 612 struct nfsd4_create *create = &u->create;
1da177e4 613 struct svc_fh resfh;
b37ad28b 614 __be32 status;
1da177e4
LT		 615 dev_t rdev;
616
617 fh_init(&resfh, NFS4_FHSIZE);
618
fa08139d 619 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 620 if (status)
621 return status;
622
3c8e0316
YZ		 623 status = check_attr_support(rqstp, cstate, create->cr_bmval,
624 nfsd_attrmask);
625 if (status)
626 return status;
627
880a3a53 628 current->fs->umask = create->cr_umask;
1da177e4
LT		 629 switch (create->cr_type) {
630 case NF4LNK:
ca364317
BF		 631 status = nfsd_symlink(rqstp, &cstate->current_fh,
632 create->cr_name, create->cr_namelen,
1e444f5b 633 create->cr_data, &resfh);
1da177e4
LT		 634 break;
635
636 case NF4BLK:
880a3a53 637 status = nfserr_inval;
1da177e4
LT		 638 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
639 if (MAJOR(rdev) != create->cr_specdata1 ||
640 MINOR(rdev) != create->cr_specdata2)
880a3a53 641 goto out_umask;
ca364317
BF		 642 status = nfsd_create(rqstp, &cstate->current_fh,
643 create->cr_name, create->cr_namelen,
644 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 645 break;
646
647 case NF4CHR:
880a3a53 648 status = nfserr_inval;
1da177e4
LT		 649 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
650 if (MAJOR(rdev) != create->cr_specdata1 ||
651 MINOR(rdev) != create->cr_specdata2)
880a3a53 652 goto out_umask;
ca364317
BF		 653 status = nfsd_create(rqstp, &cstate->current_fh,
654 create->cr_name, create->cr_namelen,
655 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 656 break;
657
658 case NF4SOCK:
ca364317
BF		 659 status = nfsd_create(rqstp, &cstate->current_fh,
660 create->cr_name, create->cr_namelen,
661 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 662 break;
663
664 case NF4FIFO:
ca364317
BF		 665 status = nfsd_create(rqstp, &cstate->current_fh,
666 create->cr_name, create->cr_namelen,
667 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 668 break;
669
670 case NF4DIR:
671 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 672 status = nfsd_create(rqstp, &cstate->current_fh,
673 create->cr_name, create->cr_namelen,
674 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 675 break;
676
677 default:
678 status = nfserr_badtype;
679 }
680
9208faf2
YZ		 681 if (status)
682 goto out;
1da177e4 683
18032ca0
DQ		 684 if (create->cr_label.len)
685 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
686
9208faf2
YZ		 687 if (create->cr_acl != NULL)
688 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
689 create->cr_bmval);
690
691 fh_unlock(&cstate->current_fh);
692 set_change_info(&create->cr_cinfo, &cstate->current_fh);
693 fh_dup2(&cstate->current_fh, &resfh);
694out:
1da177e4 695 fh_put(&resfh);
880a3a53
BF		 696out_umask:
697 current->fs->umask = 0;
1da177e4
LT		 698 return status;
699}
700
7191155b 701static __be32
ca364317 702nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 703 union nfsd4_op_u *u)
1da177e4 704{
eb69853d 705 struct nfsd4_getattr *getattr = &u->getattr;
b37ad28b 706 __be32 status;
1da177e4 707
8837abca 708 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 709 if (status)
710 return status;
711
712 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
713 return nfserr_inval;
714
916d2d84
BF		 715 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
716 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
717 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 718
ca364317 719 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 720 return nfs_ok;
721}
722
7191155b 723static __be32
ca364317 724nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 725 union nfsd4_op_u *u)
1da177e4 726{
eb69853d 727 struct nfsd4_link *link = &u->link;
95424460 728 __be32 status;
1da177e4 729
ca364317
BF		 730 status = nfsd_link(rqstp, &cstate->current_fh,
731 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 732 if (!status)
ca364317 733 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 734 return status;
735}
736
0ff7ab46 737static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 738{
739 struct svc_fh tmp_fh;
b37ad28b 740 __be32 ret;
1da177e4
LT		 741
742 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 743 ret = exp_pseudoroot(rqstp, &tmp_fh);
744 if (ret)
1da177e4 745 return ret;
0ff7ab46 746 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 747 fh_put(&tmp_fh);
748 return nfserr_noent;
749 }
750 fh_put(&tmp_fh);
0ff7ab46
BF		 751 return nfsd_lookup(rqstp, fh, "..", 2, fh);
752}
753
754static __be32
755nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 756 union nfsd4_op_u *u)
0ff7ab46
BF		 757{
758 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 759}
760
7191155b 761static __be32
ca364317 762nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 763 union nfsd4_op_u *u)
1da177e4 764{
ca364317 765 return nfsd_lookup(rqstp, &cstate->current_fh,
eb69853d 766 u->lookup.lo_name, u->lookup.lo_len,
ca364317 767 &cstate->current_fh);
1da177e4
LT		 768}
769
7191155b 770static __be32
ca364317 771nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 772 union nfsd4_op_u *u)
1da177e4 773{
eb69853d 774 struct nfsd4_read *read = &u->read;
b37ad28b 775 __be32 status;
1da177e4 776
5c4583b2 777 read->rd_nf = NULL;
1da177e4
LT		 778 if (read->rd_offset >= OFFSET_MAX)
779 return nfserr_inval;
780
87c5942e
CL		 781 trace_nfsd_read_start(rqstp, &cstate->current_fh,
782 read->rd_offset, read->rd_length);
783
9b3234b9
BF		 784 /*
785 * If we do a zero copy read, then a client will see read data
786 * that reflects the state of the file *after* performing the
787 * following compound.
788 *
789 * To ensure proper ordering, we therefore turn off zero copy if
790 * the client wants us to do more in this compound:
791 */
792 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 793 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 794
1da177e4 795 /* check stateid */
aa0d6aed
AS		 796 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
797 &read->rd_stateid, RD_STATE,
624322f1 798 &read->rd_nf, NULL);
af90f707 799 if (status) {
1da177e4
LT		 800 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
801 goto out;
802 }
803 status = nfs_ok;
804out:
1da177e4 805 read->rd_rqstp = rqstp;
ca364317 806 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 807 return status;
808}
809
34b1744c
BF		 810
811static void
812nfsd4_read_release(union nfsd4_op_u *u)
813{
5c4583b2
JL		 814 if (u->read.rd_nf)
815 nfsd_file_put(u->read.rd_nf);
87c5942e
CL		 816 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
817 u->read.rd_offset, u->read.rd_length);
34b1744c
BF		 818}
819
7191155b 820static __be32
ca364317 821nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 822 union nfsd4_op_u *u)
1da177e4 823{
eb69853d 824 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 825 u64 cookie = readdir->rd_cookie;
826 static const nfs4_verifier zeroverf;
827
828 /* no need to check permission - this will be done in nfsd_readdir() */
829
830 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
831 return nfserr_inval;
832
916d2d84
BF		 833 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
834 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
835 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 836
832023bf 837 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 838 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
839 return nfserr_bad_cookie;
840
841 readdir->rd_rqstp = rqstp;
ca364317 842 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 843 return nfs_ok;
844}
845
7191155b 846static __be32
ca364317 847nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 848 union nfsd4_op_u *u)
1da177e4 849{
eb69853d
CH		 850 u->readlink.rl_rqstp = rqstp;
851 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 852 return nfs_ok;
853}
854
7191155b 855static __be32
ca364317 856nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 857 union nfsd4_op_u *u)
1da177e4 858{
eb69853d 859 struct nfsd4_remove *remove = &u->remove;
b37ad28b 860 __be32 status;
1da177e4 861
c87fb4a3 862 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 863 return nfserr_grace;
ca364317
BF		 864 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
865 remove->rm_name, remove->rm_namelen);
1da177e4 866 if (!status) {
ca364317
BF		 867 fh_unlock(&cstate->current_fh);
868 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 869 }
870 return status;
871}
872
7191155b 873static __be32
ca364317 874nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 875 union nfsd4_op_u *u)
1da177e4 876{
eb69853d 877 struct nfsd4_rename *rename = &u->rename;
95424460 878 __be32 status;
1da177e4 879
f8f71d00 880 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 881 return nfserr_grace;
ca364317
BF		 882 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
883 rename->rn_snamelen, &cstate->current_fh,
1da177e4 884 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 885 if (status)
886 return status;
887 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
888 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
889 return nfs_ok;
1da177e4
LT		 890}
891
dcb488a3
AA		 892static __be32
893nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 894 union nfsd4_op_u *u)
dcb488a3 895{
eb69853d 896 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 897 struct svc_export *exp;
898 struct dentry *dentry;
899 __be32 err;
900
29a78a3e
BF		 901 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
902 if (err)
903 return err;
dcb488a3
AA		 904 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
905 secinfo->si_name, secinfo->si_namelen,
906 &exp, &dentry);
907 if (err)
908 return err;
2f6fc056 909 fh_unlock(&cstate->current_fh);
2b0143b5 910 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 911 exp_put(exp);
912 err = nfserr_noent;
913 } else
914 secinfo->si_exp = exp;
915 dput(dentry);
56560b9a
BF		 916 if (cstate->minorversion)
917 /* See rfc 5661 section 2.6.3.1.1.8 */
918 fh_put(&cstate->current_fh);
dcb488a3
AA		 919 return err;
920}
921
04f4ad16
BF		 922static __be32
923nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 924 union nfsd4_op_u *u)
04f4ad16
BF		 925{
926 __be32 err;
927
eb69853d 928 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 929 case NFS4_SECINFO_STYLE4_CURRENT_FH:
930 break;
931 case NFS4_SECINFO_STYLE4_PARENT:
932 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
933 if (err)
934 return err;
935 break;
936 default:
937 return nfserr_inval;
938 }
bf18f163 939
eb69853d 940 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 941 fh_put(&cstate->current_fh);
942 return nfs_ok;
943}
944
34b1744c
BF		 945static void
946nfsd4_secinfo_release(union nfsd4_op_u *u)
947{
948 if (u->secinfo.si_exp)
949 exp_put(u->secinfo.si_exp);
950}
951
ec572b9e
EG		 952static void
953nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
954{
955 if (u->secinfo_no_name.sin_exp)
956 exp_put(u->secinfo_no_name.sin_exp);
957}
958
7191155b 959static __be32
ca364317 960nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 961 union nfsd4_op_u *u)
1da177e4 962{
eb69853d 963 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 964 __be32 status = nfs_ok;
96f6f985 965 int err;
1da177e4 966
1da177e4 967 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 968 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed 969 &cstate->current_fh, &setattr->sa_stateid,
624322f1 970 WR_STATE, NULL, NULL);
375c5547 971 if (status) {
3e3b4800 972 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 973 return status;
974 }
1da177e4 975 }
96f6f985
AV		 976 err = fh_want_write(&cstate->current_fh);
977 if (err)
978 return nfserrno(err);
1da177e4 979 status = nfs_ok;
3c8e0316
YZ		 980
981 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
982 nfsd_attrmask);
983 if (status)
984 goto out;
985
1da177e4 986 if (setattr->sa_acl != NULL)
ca364317
BF		 987 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
988 setattr->sa_acl);
1da177e4 989 if (status)
18f335af 990 goto out;
18032ca0
DQ		 991 if (setattr->sa_label.len)
992 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
993 &setattr->sa_label);
994 if (status)
995 goto out;
ca364317 996 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
2a1aa489 997 0, (time64_t)0);
18f335af 998out:
bad0dcff 999 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 1000 return status;
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 1008 stateid_t *stateid = &write->wr_stateid;
5c4583b2 1009 struct nfsd_file *nf = 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 1020 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1021 stateid, WR_STATE, &nf, 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;
1da177e4 1028
c1346a12
CL		 1029 nvecs = svc_fill_write_vector(rqstp, write->wr_payload.pages,
1030 write->wr_payload.head, write->wr_buflen);
ffe1137b
BF		 1031 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1032
16f8f894 1033 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
af90f707 1034 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
19e0663f
TM		 1035 write->wr_how_written,
1036 (__be32 *)write->wr_verifier.data);
5c4583b2 1037 nfsd_file_put(nf);
1da177e4 1038
31dec253 1039 write->wr_bytes_written = cnt;
d890be15
CL		 1040 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1041 write->wr_offset, cnt);
1da177e4 1042 return status;
1da177e4
LT		 1043}
1044
ffa0160a 1045static __be32
29ae7f9d 1046nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5c4583b2
JL		 1047 stateid_t *src_stateid, struct nfsd_file **src,
1048 stateid_t *dst_stateid, struct nfsd_file **dst)
ffa0160a 1049{
ffa0160a
CH		 1050 __be32 status;
1051
01310bb7
SM		 1052 if (!cstate->save_fh.fh_dentry)
1053 return nfserr_nofilehandle;
1054
ffa0160a 1055 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
624322f1 1056 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1057 if (status) {
1058 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1059 goto out;
1060 }
1061
1062 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1063 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1064 if (status) {
1065 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1066 goto out_put_src;
1067 }
1068
1069 /* fix up for NFS-specific error code */
5c4583b2
JL		 1070 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1071 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
ffa0160a
CH		 1072 status = nfserr_wrong_type;
1073 goto out_put_dst;
1074 }
1075
29ae7f9d
AS		 1076out:
1077 return status;
1078out_put_dst:
5c4583b2 1079 nfsd_file_put(*dst);
29ae7f9d 1080out_put_src:
5c4583b2 1081 nfsd_file_put(*src);
29ae7f9d
AS		 1082 goto out;
1083}
1084
1085static __be32
1086nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1087 union nfsd4_op_u *u)
29ae7f9d 1088{
eb69853d 1089 struct nfsd4_clone *clone = &u->clone;
5c4583b2 1090 struct nfsd_file *src, *dst;
29ae7f9d
AS		 1091 __be32 status;
1092
1093 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1094 &clone->cl_dst_stateid, &dst);
1095 if (status)
1096 goto out;
1097
b66ae6dd
TM		 1098 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1099 dst, clone->cl_dst_pos, clone->cl_count,
a25e3726 1100 EX_ISSYNC(cstate->current_fh.fh_export));
ffa0160a 1101
5c4583b2
JL		 1102 nfsd_file_put(dst);
1103 nfsd_file_put(src);
ffa0160a
CH		 1104out:
1105 return status;
1106}
1107
e0639dc5
OK		 1108void nfs4_put_copy(struct nfsd4_copy *copy)
1109{
1110 if (!refcount_dec_and_test(&copy->refcount))
1111 return;
1112 kfree(copy);
1113}
1114
1115static bool
1116check_and_set_stop_copy(struct nfsd4_copy *copy)
1117{
1118 bool value;
1119
1120 spin_lock(&copy->cp_clp->async_lock);
1121 value = copy->stopped;
1122 if (!copy->stopped)
1123 copy->stopped = true;
1124 spin_unlock(&copy->cp_clp->async_lock);
1125 return value;
1126}
1127
1128static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1129{
1130 /* only 1 thread should stop the copy */
1131 if (!check_and_set_stop_copy(copy))
1132 kthread_stop(copy->copy_task);
1133 nfs4_put_copy(copy);
1134}
1135
1136static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1137{
1138 struct nfsd4_copy *copy = NULL;
1139
1140 spin_lock(&clp->async_lock);
1141 if (!list_empty(&clp->async_copies)) {
1142 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1143 copies);
1144 refcount_inc(&copy->refcount);
1145 }
1146 spin_unlock(&clp->async_lock);
1147 return copy;
1148}
1149
1150void nfsd4_shutdown_copy(struct nfs4_client *clp)
1151{
1152 struct nfsd4_copy *copy;
1153
1154 while ((copy = nfsd4_get_copy(clp)) != NULL)
1155 nfsd4_stop_copy(copy);
1156}
ce0887ac
OK		 1157#ifdef CONFIG_NFSD_V4_2_INTER_SSC
1158
1159extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1160 struct nfs_fh *src_fh,
1161 nfs4_stateid *stateid);
1162extern void nfs42_ssc_close(struct file *filep);
1163
1164extern void nfs_sb_deactive(struct super_block *sb);
1165
1166#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1167
f2453978 1168/*
ce0887ac
OK		 1169 * Support one copy source server for now.
1170 */
1171static __be32
1172nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1173 struct vfsmount **mount)
1174{
1175 struct file_system_type *type;
1176 struct vfsmount *ss_mnt;
1177 struct nfs42_netaddr *naddr;
1178 struct sockaddr_storage tmp_addr;
1179 size_t tmp_addrlen, match_netid_len = 3;
1180 char *startsep = "", *endsep = "", *match_netid = "tcp";
1181 char *ipaddr, *dev_name, *raw_data;
b8290ca2
OK		 1182 int len, raw_len;
1183 __be32 status = nfserr_inval;
ce0887ac
OK		 1184
1185 naddr = &nss->u.nl4_addr;
1186 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1187 naddr->addr_len,
1188 (struct sockaddr *)&tmp_addr,
1189 sizeof(tmp_addr));
1190 if (tmp_addrlen == 0)
1191 goto out_err;
1192
1193 if (tmp_addr.ss_family == AF_INET6) {
1194 startsep = "[";
1195 endsep = "]";
1196 match_netid = "tcp6";
1197 match_netid_len = 4;
1198 }
1199
1200 if (naddr->netid_len != match_netid_len ||
1201 strncmp(naddr->netid, match_netid, naddr->netid_len))
1202 goto out_err;
1203
1204 /* Construct the raw data for the vfs_kern_mount call */
1205 len = RPC_MAX_ADDRBUFLEN + 1;
1206 ipaddr = kzalloc(len, GFP_KERNEL);
1207 if (!ipaddr)
1208 goto out_err;
1209
1210 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1211
1212 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1213
1214 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1215 raw_data = kzalloc(raw_len, GFP_KERNEL);
1216 if (!raw_data)
1217 goto out_free_ipaddr;
1218
1219 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1220
b8290ca2 1221 status = nfserr_nodev;
ce0887ac
OK		 1222 type = get_fs_type("nfs");
1223 if (!type)
1224 goto out_free_rawdata;
1225
1226 /* Set the server:<export> for the vfs_kern_mount call */
1227 dev_name = kzalloc(len + 5, GFP_KERNEL);
1228 if (!dev_name)
1229 goto out_free_rawdata;
1230 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1231
1232 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1233 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1234 module_put(type->owner);
1235 if (IS_ERR(ss_mnt))
1236 goto out_free_devname;
1237
1238 status = 0;
1239 *mount = ss_mnt;
1240
1241out_free_devname:
1242 kfree(dev_name);
1243out_free_rawdata:
1244 kfree(raw_data);
1245out_free_ipaddr:
1246 kfree(ipaddr);
1247out_err:
1248 return status;
1249}
1250
1251static void
1252nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1253{
0cfcd405 1254 nfs_do_sb_deactive(ss_mnt->mnt_sb);
ce0887ac
OK		 1255 mntput(ss_mnt);
1256}
1257
f2453978 1258/*
ce0887ac 1259 * Verify COPY destination stateid.
f2453978 1260 *
ce0887ac
OK		 1261 * Connect to the source server with NFSv4.1.
1262 * Create the source struct file for nfsd_copy_range.
1263 * Called with COPY cstate:
1264 * SAVED_FH: source filehandle
1265 * CURRENT_FH: destination filehandle
ce0887ac
OK		 1266 */
1267static __be32
1268nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1269 struct nfsd4_compound_state *cstate,
1270 struct nfsd4_copy *copy, struct vfsmount **mount)
1271{
1272 struct svc_fh *s_fh = NULL;
1273 stateid_t *s_stid = &copy->cp_src_stateid;
b8290ca2 1274 __be32 status = nfserr_inval;
ce0887ac
OK		 1275
1276 /* Verify the destination stateid and set dst struct file*/
1277 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1278 &copy->cp_dst_stateid,
1279 WR_STATE, &copy->nf_dst, NULL);
1280 if (status)
1281 goto out;
1282
1283 status = nfsd4_interssc_connect(&copy->cp_src, rqstp, mount);
1284 if (status)
1285 goto out;
1286
1287 s_fh = &cstate->save_fh;
1288
1289 copy->c_fh.size = s_fh->fh_handle.fh_size;
1290 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
3f9544ca 1291 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
ce0887ac
OK		 1292 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1293 sizeof(stateid_opaque_t));
1294
1295 status = 0;
1296out:
1297 return status;
1298}
1299
1300static void
1301nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1302 struct nfsd_file *dst)
1303{
1304 nfs42_ssc_close(src->nf_file);
614c9750 1305 fput(src->nf_file);
ce0887ac
OK		 1306 nfsd_file_put(dst);
1307 mntput(ss_mnt);
1308}
1309
1310#else /* CONFIG_NFSD_V4_2_INTER_SSC */
1311
1312static __be32
1313nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1314 struct nfsd4_compound_state *cstate,
1315 struct nfsd4_copy *copy,
1316 struct vfsmount **mount)
1317{
1318 *mount = NULL;
b8290ca2 1319 return nfserr_inval;
ce0887ac
OK		 1320}
1321
1322static void
1323nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1324 struct nfsd_file *dst)
1325{
1326}
1327
1328static void
1329nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1330{
1331}
1332
1333static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1334 struct nfs_fh *src_fh,
1335 nfs4_stateid *stateid)
1336{
1337 return NULL;
1338}
1339#endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1340
1341static __be32
1342nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1343 struct nfsd4_compound_state *cstate,
1344 struct nfsd4_copy *copy)
1345{
1346 return nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
1347 &copy->nf_src, &copy->cp_dst_stateid,
1348 &copy->nf_dst);
1349}
1350
1351static void
1352nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1353{
1354 nfsd_file_put(src);
1355 nfsd_file_put(dst);
1356}
e0639dc5
OK		 1357
1358static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1359{
1360 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1361
1362 nfs4_put_copy(copy);
1363}
1364
1365static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1366 struct rpc_task *task)
1367{
1368 return 1;
1369}
1370
1371static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1372 .release = nfsd4_cb_offload_release,
1373 .done = nfsd4_cb_offload_done
1374};
1375
1376static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1377{
1378 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1379 copy->cp_synchronous = sync;
1380 gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
1381}
1382
1383static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1384{
1385 ssize_t bytes_copied = 0;
1386 size_t bytes_total = copy->cp_count;
1387 u64 src_pos = copy->cp_src_pos;
1388 u64 dst_pos = copy->cp_dst_pos;
1389
1390 do {
1391 if (kthread_should_stop())
1392 break;
5c4583b2
JL		 1393 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1394 src_pos, copy->nf_dst->nf_file, dst_pos,
1395 bytes_total);
e0639dc5
OK		 1396 if (bytes_copied <= 0)
1397 break;
1398 bytes_total -= bytes_copied;
1399 copy->cp_res.wr_bytes_written += bytes_copied;
1400 src_pos += bytes_copied;
1401 dst_pos += bytes_copied;
1402 } while (bytes_total > 0 && !copy->cp_synchronous);
1403 return bytes_copied;
1404}
1405
1406static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1407{
1408 __be32 status;
1409 ssize_t bytes;
1410
1411 bytes = _nfsd_copy_file_range(copy);
1412 /* for async copy, we ignore the error, client can always retry
1413 * to get the error
1414 */
1415 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1416 status = nfserrno(bytes);
1417 else {
1418 nfsd4_init_copy_res(copy, sync);
1419 status = nfs_ok;
1420 }
1421
ce0887ac
OK		 1422 if (!copy->cp_intra) /* Inter server SSC */
1423 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1424 copy->nf_dst);
1425 else
1426 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1427
e0639dc5
OK		 1428 return status;
1429}
1430
eb162e17 1431static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
e0639dc5
OK		 1432{
1433 dst->cp_src_pos = src->cp_src_pos;
1434 dst->cp_dst_pos = src->cp_dst_pos;
1435 dst->cp_count = src->cp_count;
1436 dst->cp_synchronous = src->cp_synchronous;
1437 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1438 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1439 dst->cp_clp = src->cp_clp;
5c4583b2 1440 dst->nf_dst = nfsd_file_get(src->nf_dst);
ce0887ac
OK		 1441 dst->cp_intra = src->cp_intra;
1442 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1443 dst->nf_src = nfsd_file_get(src->nf_src);
1444
e0639dc5 1445 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
ce0887ac
OK		 1446 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1447 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1448 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1449 dst->ss_mnt = src->ss_mnt;
e0639dc5
OK		 1450}
1451
1452static void cleanup_async_copy(struct nfsd4_copy *copy)
1453{
624322f1 1454 nfs4_free_copy_state(copy);
5c4583b2 1455 nfsd_file_put(copy->nf_dst);
2e577f0f
OK		 1456 if (copy->cp_intra)
1457 nfsd_file_put(copy->nf_src);
e0639dc5
OK		 1458 spin_lock(&copy->cp_clp->async_lock);
1459 list_del(&copy->copies);
1460 spin_unlock(&copy->cp_clp->async_lock);
1461 nfs4_put_copy(copy);
1462}
1463
1464static int nfsd4_do_async_copy(void *data)
1465{
1466 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1467 struct nfsd4_copy *cb_copy;
1468
ce0887ac
OK		 1469 if (!copy->cp_intra) { /* Inter server SSC */
1470 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1471 if (!copy->nf_src) {
1472 copy->nfserr = nfserr_serverfault;
1473 nfsd4_interssc_disconnect(copy->ss_mnt);
1474 goto do_callback;
1475 }
1476 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, &copy->c_fh,
1477 &copy->stateid);
1478 if (IS_ERR(copy->nf_src->nf_file)) {
ce0887ac
OK		 1479 copy->nfserr = nfserr_offload_denied;
1480 nfsd4_interssc_disconnect(copy->ss_mnt);
1481 goto do_callback;
1482 }
1483 }
1484
e0639dc5 1485 copy->nfserr = nfsd4_do_copy(copy, 0);
ce0887ac 1486do_callback:
e0639dc5
OK		 1487 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1488 if (!cb_copy)
1489 goto out;
49a36132 1490 refcount_set(&cb_copy->refcount, 1);
e0639dc5
OK		 1491 memcpy(&cb_copy->cp_res, &copy->cp_res, sizeof(copy->cp_res));
1492 cb_copy->cp_clp = copy->cp_clp;
1493 cb_copy->nfserr = copy->nfserr;
1494 memcpy(&cb_copy->fh, &copy->fh, sizeof(copy->fh));
1495 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1496 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1497 nfsd4_run_cb(&cb_copy->cp_cb);
1498out:
ce0887ac
OK		 1499 if (!copy->cp_intra)
1500 kfree(copy->nf_src);
e0639dc5
OK		 1501 cleanup_async_copy(copy);
1502 return 0;
1503}
1504
29ae7f9d
AS		 1505static __be32
1506nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1507 union nfsd4_op_u *u)
29ae7f9d 1508{
eb69853d 1509 struct nfsd4_copy *copy = &u->copy;
29ae7f9d 1510 __be32 status;
e0639dc5 1511 struct nfsd4_copy *async_copy = NULL;
29ae7f9d 1512
ce0887ac
OK		 1513 if (!copy->cp_intra) { /* Inter server SSC */
1514 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1515 status = nfserr_notsupp;
1516 goto out;
1517 }
1518 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1519 &copy->ss_mnt);
1520 if (status)
1521 return nfserr_offload_denied;
1522 } else {
1523 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1524 if (status)
1525 return status;
1526 }
29ae7f9d 1527
e0639dc5
OK		 1528 copy->cp_clp = cstate->clp;
1529 memcpy(&copy->fh, &cstate->current_fh.fh_handle,
1530 sizeof(struct knfsd_fh));
1531 if (!copy->cp_synchronous) {
1532 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
29ae7f9d 1533
e0639dc5
OK		 1534 status = nfserrno(-ENOMEM);
1535 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1536 if (!async_copy)
ce0887ac
OK		 1537 goto out_err;
1538 if (!nfs4_init_copy_state(nn, copy))
1539 goto out_err;
e0639dc5
OK		 1540 refcount_set(&async_copy->refcount, 1);
1541 memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid,
1542 sizeof(copy->cp_stateid));
eb162e17 1543 dup_copy_fields(copy, async_copy);
e0639dc5
OK		 1544 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1545 async_copy, "%s", "copy thread");
1546 if (IS_ERR(async_copy->copy_task))
1547 goto out_err;
1548 spin_lock(&async_copy->cp_clp->async_lock);
1549 list_add(&async_copy->copies,
1550 &async_copy->cp_clp->async_copies);
1551 spin_unlock(&async_copy->cp_clp->async_lock);
1552 wake_up_process(async_copy->copy_task);
29ae7f9d 1553 status = nfs_ok;
ce0887ac 1554 } else {
e0639dc5 1555 status = nfsd4_do_copy(copy, 1);
ce0887ac 1556 }
29ae7f9d
AS		 1557out:
1558 return status;
e0639dc5 1559out_err:
18f428d4
OK		 1560 if (async_copy)
1561 cleanup_async_copy(async_copy);
ce0887ac
OK		 1562 status = nfserrno(-ENOMEM);
1563 if (!copy->cp_intra)
1564 nfsd4_interssc_disconnect(copy->ss_mnt);
e0639dc5
OK		 1565 goto out;
1566}
1567
1568struct nfsd4_copy *
1569find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1570{
1571 struct nfsd4_copy *copy;
1572
1573 spin_lock(&clp->async_lock);
1574 list_for_each_entry(copy, &clp->async_copies, copies) {
ce0887ac 1575 if (memcmp(&copy->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
e0639dc5
OK		 1576 continue;
1577 refcount_inc(&copy->refcount);
1578 spin_unlock(&clp->async_lock);
1579 return copy;
1580 }
1581 spin_unlock(&clp->async_lock);
1582 return NULL;
29ae7f9d
AS		 1583}
1584
885e2bf3
OK		 1585static __be32
1586nfsd4_offload_cancel(struct svc_rqst *rqstp,
1587 struct nfsd4_compound_state *cstate,
1588 union nfsd4_op_u *u)
1589{
e0639dc5 1590 struct nfsd4_offload_status *os = &u->offload_status;
e0639dc5
OK		 1591 struct nfsd4_copy *copy;
1592 struct nfs4_client *clp = cstate->clp;
1593
1594 copy = find_async_copy(clp, &os->stateid);
ce0887ac
OK		 1595 if (!copy) {
1596 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1597
1598 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1599 } else
e0639dc5 1600 nfsd4_stop_copy(copy);
e0639dc5 1601
ce0887ac 1602 return nfs_ok;
885e2bf3
OK		 1603}
1604
51911868
OK		 1605static __be32
1606nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1607 union nfsd4_op_u *u)
1608{
624322f1
OK		 1609 struct nfsd4_copy_notify *cn = &u->copy_notify;
1610 __be32 status;
1611 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1612 struct nfs4_stid *stid;
1613 struct nfs4_cpntf_state *cps;
1614 struct nfs4_client *clp = cstate->clp;
1615
1616 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1617 &cn->cpn_src_stateid, RD_STATE, NULL,
1618 &stid);
1619 if (status)
1620 return status;
1621
1622 cn->cpn_sec = nn->nfsd4_lease;
1623 cn->cpn_nsec = 0;
1624
1625 status = nfserrno(-ENOMEM);
1626 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1627 if (!cps)
1628 goto out;
1629 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1630 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1631 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1632
1633 /* For now, only return one server address in cpn_src, the
1634 * address used by the client to connect to this server.
1635 */
1636 cn->cpn_src.nl4_type = NL4_NETADDR;
1637 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1638 &cn->cpn_src.u.nl4_addr);
1639 WARN_ON_ONCE(status);
1640 if (status) {
1641 nfs4_put_cpntf_state(nn, cps);
1642 goto out;
1643 }
1644out:
1645 nfs4_put_stid(stid);
1646 return status;
51911868
OK		 1647}
1648
95d871f0
AS		 1649static __be32
1650nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1651 struct nfsd4_fallocate *fallocate, int flags)
1652{
0d4d6720 1653 __be32 status;
5c4583b2 1654 struct nfsd_file *nf;
95d871f0 1655
aa0d6aed 1656 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1657 &fallocate->falloc_stateid,
624322f1 1658 WR_STATE, &nf, NULL);
95d871f0
AS		 1659 if (status != nfs_ok) {
1660 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1661 return status;
1662 }
1663
5c4583b2 1664 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
95d871f0
AS		 1665 fallocate->falloc_offset,
1666 fallocate->falloc_length,
1667 flags);
5c4583b2 1668 nfsd_file_put(nf);
95d871f0
AS		 1669 return status;
1670}
6308bc98
OK		 1671static __be32
1672nfsd4_offload_status(struct svc_rqst *rqstp,
1673 struct nfsd4_compound_state *cstate,
1674 union nfsd4_op_u *u)
1675{
e0639dc5
OK		 1676 struct nfsd4_offload_status *os = &u->offload_status;
1677 __be32 status = 0;
1678 struct nfsd4_copy *copy;
1679 struct nfs4_client *clp = cstate->clp;
1680
1681 copy = find_async_copy(clp, &os->stateid);
1682 if (copy) {
1683 os->count = copy->cp_res.wr_bytes_written;
1684 nfs4_put_copy(copy);
1685 } else
1686 status = nfserr_bad_stateid;
1687
1688 return status;
6308bc98 1689}
95d871f0
AS		 1690
1691static __be32
1692nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1693 union nfsd4_op_u *u)
95d871f0 1694{
eb69853d 1695 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1696}
1697
b0cb9085
AS		 1698static __be32
1699nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1700 union nfsd4_op_u *u)
b0cb9085 1701{
eb69853d 1702 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1703 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1704}
1705
24bab491
AS		 1706static __be32
1707nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1708 union nfsd4_op_u *u)
24bab491 1709{
eb69853d 1710 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1711 int whence;
1712 __be32 status;
5c4583b2 1713 struct nfsd_file *nf;
24bab491 1714
aa0d6aed 1715 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1716 &seek->seek_stateid,
624322f1 1717 RD_STATE, &nf, NULL);
24bab491
AS		 1718 if (status) {
1719 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1720 return status;
1721 }
1722
1723 switch (seek->seek_whence) {
1724 case NFS4_CONTENT_DATA:
1725 whence = SEEK_DATA;
1726 break;
1727 case NFS4_CONTENT_HOLE:
1728 whence = SEEK_HOLE;
1729 break;
1730 default:
1731 status = nfserr_union_notsupp;
1732 goto out;
1733 }
1734
1735 /*
1736 * Note: This call does change file->f_pos, but nothing in NFSD
1737 * should ever file->f_pos.
1738 */
5c4583b2 1739 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
24bab491
AS		 1740 if (seek->seek_pos < 0)
1741 status = nfserrno(seek->seek_pos);
5c4583b2 1742 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
24bab491
AS		 1743 seek->seek_eof = true;
1744
1745out:
5c4583b2 1746 nfsd_file_put(nf);
24bab491
AS		 1747 return status;
1748}
1749
1da177e4
LT		 1750/* This routine never returns NFS_OK! If there are no other errors, it
1751 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1752 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1753 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1754 */
b37ad28b 1755static __be32
c954e2a5 1756_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1757 struct nfsd4_verify *verify)
1da177e4 1758{
2ebbc012 1759 __be32 *buf, *p;
1da177e4 1760 int count;
b37ad28b 1761 __be32 status;
1da177e4 1762
8837abca 1763 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1764 if (status)
1765 return status;
1766
3c8e0316
YZ		 1767 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1768 if (status)
1769 return status;
1770
1da177e4
LT		 1771 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1772 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1773 return nfserr_inval;
1774 if (verify->ve_attrlen & 3)
1775 return nfserr_inval;
1776
1777 /* count in words:
1778 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1779 */
1780 count = 4 + (verify->ve_attrlen >> 2);
1781 buf = kmalloc(count << 2, GFP_KERNEL);
1782 if (!buf)
3e772463 1783 return nfserr_jukebox;
1da177e4 1784
84822d0b 1785 p = buf;
d5184658 1786 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1787 cstate->current_fh.fh_export,
d5184658
BF		 1788 cstate->current_fh.fh_dentry,
1789 verify->ve_bmval,
406a7ea9 1790 rqstp, 0);
41ae6e71
BF		 1791 /*
1792 * If nfsd4_encode_fattr() ran out of space, assume that's because
1793 * the attributes are longer (hence different) than those given:
1794 */
84822d0b 1795 if (status == nfserr_resource)
1da177e4
LT		 1796 status = nfserr_not_same;
1797 if (status)
1798 goto out_kfree;
1799
95ec28cd
BH		 1800 /* skip bitmap */
1801 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1802 status = nfserr_not_same;
1803 if (ntohl(*p++) != verify->ve_attrlen)
1804 goto out_kfree;
1805 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1806 status = nfserr_same;
1807
1808out_kfree:
1809 kfree(buf);
1810 return status;
1811}
1812
c954e2a5
BF		 1813static __be32
1814nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1815 union nfsd4_op_u *u)
c954e2a5
BF		 1816{
1817 __be32 status;
1818
eb69853d 1819 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1820 return status == nfserr_not_same ? nfs_ok : status;
1821}
1822
1823static __be32
1824nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1825 union nfsd4_op_u *u)
c954e2a5
BF		 1826{
1827 __be32 status;
1828
eb69853d 1829 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1830 return status == nfserr_same ? nfs_ok : status;
1831}
1832
9cf514cc
CH		 1833#ifdef CONFIG_NFSD_PNFS
1834static const struct nfsd4_layout_ops *
1835nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1836{
8a4c3926 1837 if (!exp->ex_layout_types) {
9cf514cc
CH		 1838 dprintk("%s: export does not support pNFS\n", __func__);
1839 return NULL;
1840 }
1841
b550a32e
AK		 1842 if (layout_type >= LAYOUT_TYPE_MAX ||
1843 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1844 dprintk("%s: layout type %d not supported\n",
1845 __func__, layout_type);
1846 return NULL;
1847 }
1848
1849 return nfsd4_layout_ops[layout_type];
1850}
1851
1852static __be32
1853nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1854 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1855{
eb69853d 1856 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1857 const struct nfsd4_layout_ops *ops;
1858 struct nfsd4_deviceid_map *map;
1859 struct svc_export *exp;
1860 __be32 nfserr;
1861
1862 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1863 __func__,
1864 gdp->gd_layout_type,
1865 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1866 gdp->gd_maxcount);
1867
1868 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1869 if (!map) {
1870 dprintk("%s: couldn't find device ID to export mapping!\n",
1871 __func__);
1872 return nfserr_noent;
1873 }
1874
1875 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1876 if (IS_ERR(exp)) {
1877 dprintk("%s: could not find device id\n", __func__);
1878 return nfserr_noent;
1879 }
1880
1881 nfserr = nfserr_layoutunavailable;
1882 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1883 if (!ops)
1884 goto out;
1885
1886 nfserr = nfs_ok;
f99d4fbd
CH		 1887 if (gdp->gd_maxcount != 0) {
1888 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
ec59659b 1889 rqstp, cstate->clp, gdp);
f99d4fbd 1890 }
9cf514cc
CH		 1891
1892 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1893out:
a1420384 1894 exp_put(exp);
9cf514cc
CH		 1895 return nfserr;
1896}
1897
34b1744c
BF		 1898static void
1899nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1900{
1901 kfree(u->getdeviceinfo.gd_device);
1902}
1903
9cf514cc
CH		 1904static __be32
1905nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1906 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1907{
eb69853d 1908 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1909 struct svc_fh *current_fh = &cstate->current_fh;
1910 const struct nfsd4_layout_ops *ops;
1911 struct nfs4_layout_stateid *ls;
1912 __be32 nfserr;
66282ec1 1913 int accmode = NFSD_MAY_READ_IF_EXEC;
9cf514cc
CH		 1914
1915 switch (lgp->lg_seg.iomode) {
1916 case IOMODE_READ:
66282ec1 1917 accmode |= NFSD_MAY_READ;
9cf514cc
CH		 1918 break;
1919 case IOMODE_RW:
66282ec1 1920 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
9cf514cc
CH		 1921 break;
1922 default:
1923 dprintk("%s: invalid iomode %d\n",
1924 __func__, lgp->lg_seg.iomode);
1925 nfserr = nfserr_badiomode;
1926 goto out;
1927 }
1928
1929 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1930 if (nfserr)
1931 goto out;
1932
1933 nfserr = nfserr_layoutunavailable;
1934 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1935 if (!ops)
1936 goto out;
1937
1938 /*
1939 * Verify minlength and range as per RFC5661:
1940 * o If loga_length is less than loga_minlength,
1941 * the metadata server MUST return NFS4ERR_INVAL.
1942 * o If the sum of loga_offset and loga_minlength exceeds
1943 * NFS4_UINT64_MAX, and loga_minlength is not
1944 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1945 * o If the sum of loga_offset and loga_length exceeds
1946 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1947 * the error NFS4ERR_INVAL MUST result.
1948 */
1949 nfserr = nfserr_inval;
1950 if (lgp->lg_seg.length < lgp->lg_minlength ||
1951 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1952 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1953 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1954 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1955 goto out;
1956 if (lgp->lg_seg.length == 0)
1957 goto out;
1958
1959 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1960 true, lgp->lg_layout_type, &ls);
31ef83dc 1961 if (nfserr) {
f394b62b 1962 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1963 goto out;
31ef83dc 1964 }
9cf514cc 1965
c5c707f9
CH		 1966 nfserr = nfserr_recallconflict;
1967 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1968 goto out_put_stid;
1969
2b0143b5 1970 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1971 current_fh, lgp);
1972 if (nfserr)
1973 goto out_put_stid;
1974
1975 nfserr = nfsd4_insert_layout(lgp, ls);
1976
1977out_put_stid:
cc8a5532 1978 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1979 nfs4_put_stid(&ls->ls_stid);
1980out:
1981 return nfserr;
1982}
1983
34b1744c
BF		 1984static void
1985nfsd4_layoutget_release(union nfsd4_op_u *u)
1986{
1987 kfree(u->layoutget.lg_content);
1988}
1989
9cf514cc
CH		 1990static __be32
1991nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1992 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1993{
eb69853d 1994 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1995 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1996 struct svc_fh *current_fh = &cstate->current_fh;
1997 const struct nfsd4_layout_ops *ops;
1998 loff_t new_size = lcp->lc_last_wr + 1;
1999 struct inode *inode;
2000 struct nfs4_layout_stateid *ls;
2001 __be32 nfserr;
2002
2003 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2004 if (nfserr)
2005 goto out;
2006
2007 nfserr = nfserr_layoutunavailable;
2008 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2009 if (!ops)
2010 goto out;
2b0143b5 2011 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 2012
2013 nfserr = nfserr_inval;
2014 if (new_size <= seg->offset) {
2015 dprintk("pnfsd: last write before layout segment\n");
2016 goto out;
2017 }
2018 if (new_size > seg->offset + seg->length) {
2019 dprintk("pnfsd: last write beyond layout segment\n");
2020 goto out;
2021 }
2022 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2023 dprintk("pnfsd: layoutcommit beyond EOF\n");
2024 goto out;
2025 }
2026
2027 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2028 false, lcp->lc_layout_type,
2029 &ls);
2030 if (nfserr) {
f394b62b 2031 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 2032 /* fixup error code as per RFC5661 */
2033 if (nfserr == nfserr_bad_stateid)
2034 nfserr = nfserr_badlayout;
2035 goto out;
2036 }
2037
cc8a5532
JL		 2038 /* LAYOUTCOMMIT does not require any serialization */
2039 mutex_unlock(&ls->ls_mutex);
2040
9cf514cc
CH		 2041 if (new_size > i_size_read(inode)) {
2042 lcp->lc_size_chg = 1;
2043 lcp->lc_newsize = new_size;
2044 } else {
2045 lcp->lc_size_chg = 0;
2046 }
2047
d8398fc1 2048 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 2049 nfs4_put_stid(&ls->ls_stid);
2050out:
2051 return nfserr;
2052}
2053
2054static __be32
2055nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 2056 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 2057{
eb69853d 2058 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 2059 struct svc_fh *current_fh = &cstate->current_fh;
2060 __be32 nfserr;
2061
2062 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2063 if (nfserr)
2064 goto out;
2065
2066 nfserr = nfserr_layoutunavailable;
2067 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2068 goto out;
2069
2070 switch (lrp->lr_seg.iomode) {
2071 case IOMODE_READ:
2072 case IOMODE_RW:
2073 case IOMODE_ANY:
2074 break;
2075 default:
2076 dprintk("%s: invalid iomode %d\n", __func__,
2077 lrp->lr_seg.iomode);
2078 nfserr = nfserr_inval;
2079 goto out;
2080 }
2081
2082 switch (lrp->lr_return_type) {
2083 case RETURN_FILE:
2084 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2085 break;
2086 case RETURN_FSID:
2087 case RETURN_ALL:
2088 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2089 break;
2090 default:
2091 dprintk("%s: invalid return_type %d\n", __func__,
2092 lrp->lr_return_type);
2093 nfserr = nfserr_inval;
2094 break;
2095 }
2096out:
2097 return nfserr;
2098}
2099#endif /* CONFIG_NFSD_PNFS */
2100
23e50fe3
FL		 2101static __be32
2102nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2103 union nfsd4_op_u *u)
2104{
2105 struct nfsd4_getxattr *getxattr = &u->getxattr;
2106
2107 return nfsd_getxattr(rqstp, &cstate->current_fh,
2108 getxattr->getxa_name, &getxattr->getxa_buf,
2109 &getxattr->getxa_len);
2110}
2111
2112static __be32
2113nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2114 union nfsd4_op_u *u)
2115{
2116 struct nfsd4_setxattr *setxattr = &u->setxattr;
2117 __be32 ret;
2118
2119 if (opens_in_grace(SVC_NET(rqstp)))
2120 return nfserr_grace;
2121
2122 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2123 setxattr->setxa_buf, setxattr->setxa_len,
2124 setxattr->setxa_flags);
2125
2126 if (!ret)
2127 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2128
2129 return ret;
2130}
2131
2132static __be32
2133nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2134 union nfsd4_op_u *u)
2135{
2136 /*
2137 * Get the entire list, then copy out only the user attributes
2138 * in the encode function.
2139 */
2140 return nfsd_listxattr(rqstp, &cstate->current_fh,
2141 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2142}
2143
2144static __be32
2145nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2146 union nfsd4_op_u *u)
2147{
2148 struct nfsd4_removexattr *removexattr = &u->removexattr;
2149 __be32 ret;
2150
2151 if (opens_in_grace(SVC_NET(rqstp)))
2152 return nfserr_grace;
2153
2154 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2155 removexattr->rmxa_name);
2156
2157 if (!ret)
2158 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2159
2160 return ret;
2161}
2162
1da177e4
LT		 2163/*
2164 * NULL call.
2165 */
7111c66e 2166static __be32
a6beb732 2167nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4 2168{
cc028a10 2169 return rpc_success;
1da177e4
LT		 2170}
2171
e2b20950
SA		 2172static inline void nfsd4_increment_op_stats(u32 opnum)
2173{
2174 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
e567b98c 2175 percpu_counter_inc(&nfsdstats.counter[NFSD_STATS_NFS4_OP(opnum)]);
e2b20950
SA		 2176}
2177
bb2a8b0c 2178static const struct nfsd4_operation nfsd4_ops[];
b591480b 2179
f1c7f79b 2180static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 2181
f9bb94c4 2182/*
57716355 2183 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 2184 *
57716355
BF		 2185 * Also note, enforced elsewhere:
2186 * - SEQUENCE other than as first op results in
2187 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 2188 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2189 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 2190 * - DESTROY_SESSION must be the final operation in a compound, if
2191 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2192 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 2193 */
57716355 2194static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 2195{
7a04cfda 2196 struct nfsd4_op *first_op = &args->ops[0];
57716355
BF		 2197
2198 /* These ordering requirements don't apply to NFSv4.0: */
2199 if (args->minorversion == 0)
2200 return nfs_ok;
2201 /* This is weird, but OK, not our problem: */
2202 if (args->opcnt == 0)
2203 return nfs_ok;
7a04cfda 2204 if (first_op->status == nfserr_op_illegal)
57716355 2205 return nfs_ok;
7a04cfda 2206 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
57716355 2207 return nfserr_op_not_in_session;
7a04cfda 2208 if (first_op->opnum == OP_SEQUENCE)
57716355 2209 return nfs_ok;
7a04cfda
BF		 2210 /*
2211 * So first_op is something allowed outside a session, like
2212 * EXCHANGE_ID; but then it has to be the only op in the
2213 * compound:
2214 */
57716355
BF		 2215 if (args->opcnt != 1)
2216 return nfserr_not_only_op;
2217 return nfs_ok;
f9bb94c4
AA		 2218}
2219
f4f9ef4a 2220const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 2221{
2222 return &nfsd4_ops[op->opnum];
2223}
2224
1091006c
BF		 2225bool nfsd4_cache_this_op(struct nfsd4_op *op)
2226{
e372ba60
BF		 2227 if (op->opnum == OP_ILLEGAL)
2228 return false;
c856694e 2229 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 2230}
2231
68d93184
BF		 2232static bool need_wrongsec_check(struct svc_rqst *rqstp)
2233{
2234 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2235 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2236 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2237 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 2238 const struct nfsd4_operation *thisd = OPDESC(this);
2239 const struct nfsd4_operation *nextd;
68d93184 2240
68d93184
BF		 2241 /*
2242 * Most ops check wronsec on our own; only the putfh-like ops
2243 * have special rules.
2244 */
2245 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2246 return false;
2247 /*
2248 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2249 * put-filehandle operation if we're not going to use the
2250 * result:
2251 */
2252 if (argp->opcnt == resp->opcnt)
2253 return false;
51904b08
BF		 2254 if (next->opnum == OP_ILLEGAL)
2255 return false;
68d93184
BF		 2256 nextd = OPDESC(next);
2257 /*
2258 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2259 * errors themselves as necessary; others should check for them
2260 * now:
2261 */
2262 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2263}
2264
b9e8638e
OK		 2265#ifdef CONFIG_NFSD_V4_2_INTER_SSC
2266static void
2267check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2268{
2269 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2270 struct nfsd4_copy *copy;
2271 struct nfsd4_putfh *putfh;
2272 int i;
2273
2274 /* traverse all operation and if it's a COPY compound, mark the
2275 * source filehandle to skip verification
2276 */
2277 for (i = 0; i < args->opcnt; i++) {
2278 op = &args->ops[i];
2279 if (op->opnum == OP_PUTFH)
2280 current_op = op;
2281 else if (op->opnum == OP_SAVEFH)
2282 saved_op = current_op;
2283 else if (op->opnum == OP_RESTOREFH)
2284 current_op = saved_op;
2285 else if (op->opnum == OP_COPY) {
2286 copy = (struct nfsd4_copy *)&op->u;
2287 if (!saved_op) {
2288 op->status = nfserr_nofilehandle;
2289 return;
2290 }
2291 putfh = (struct nfsd4_putfh *)&saved_op->u;
2292 if (!copy->cp_intra)
2293 putfh->no_verify = true;
2294 }
2295 }
2296}
2297#else
2298static void
2299check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2300{
2301}
2302#endif
2303
1da177e4
LT		 2304/*
2305 * COMPOUND call.
2306 */
7111c66e 2307static __be32
a6beb732 2308nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 2309{
a6beb732
CH		 2310 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2311 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 2312 struct nfsd4_op *op;
e354d571 2313 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 2314 struct svc_fh *current_fh = &cstate->current_fh;
2315 struct svc_fh *save_fh = &cstate->save_fh;
e333f3bb 2316 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
b37ad28b 2317 __be32 status;
1da177e4 2318
bddfdbcd
CL		 2319 resp->xdr = &rqstp->rq_res_stream;
2320
2321 /* reserve space for: NFS status code */
2322 xdr_reserve_space(resp->xdr, XDR_UNIT);
2323
2324 resp->tagp = resp->xdr->p;
1da177e4 2325 /* reserve space for: taglen, tag, and opcnt */
bddfdbcd 2326 xdr_reserve_space(resp->xdr, XDR_UNIT * 2 + args->taglen);
1da177e4
LT		 2327 resp->taglen = args->taglen;
2328 resp->tag = args->tag;
1da177e4 2329 resp->rqstp = rqstp;
4daeed25 2330 cstate->minorversion = args->minorversion;
4daeed25
KM		 2331 fh_init(current_fh, NFS4_FHSIZE);
2332 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 2333 /*
2334 * Don't use the deferral mechanism for NFSv4; compounds make it
2335 * too hard to avoid non-idempotency problems.
2336 */
30660e04 2337 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 2338
2339 /*
2340 * According to RFC3010, this takes precedence over all other errors.
2341 */
2342 status = nfserr_minor_vers_mismatch;
e333f3bb 2343 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
1da177e4 2344 goto out;
0078117c
BF		 2345 status = nfserr_resource;
2346 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2347 goto out;
1da177e4 2348
57716355
BF		 2349 status = nfs41_check_op_ordering(args);
2350 if (status) {
f9bb94c4 2351 op = &args->ops[0];
57716355 2352 op->status = status;
5b7b15ae 2353 resp->opcnt = 1;
f9bb94c4
AA		 2354 goto encode_op;
2355 }
b9e8638e 2356 check_if_stalefh_allowed(args);
f9bb94c4 2357
28df3d15
BF		 2358 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2359
fff4080b 2360 trace_nfsd_compound(rqstp, args->opcnt);
1da177e4
LT		 2361 while (!status && resp->opcnt < args->opcnt) {
2362 op = &args->ops[resp->opcnt++];
2363
2364 /*
2365 * The XDR decode routines may have pre-set op->status;
2366 * for example, if there is a miscellaneous XDR error
2367 * it will be set to nfserr_bad_xdr.
2368 */
9d313b17
BF		 2369 if (op->status) {
2370 if (op->opnum == OP_OPEN)
2371 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 2372 goto encode_op;
9d313b17 2373 }
b9e8638e
OK		 2374 if (!current_fh->fh_dentry &&
2375 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
f4f9ef4a 2376 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 2377 op->status = nfserr_nofilehandle;
2378 goto encode_op;
2379 }
b9e8638e
OK		 2380 } else if (current_fh->fh_export &&
2381 current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 2382 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 2383 op->status = nfserr_moved;
1da177e4
LT		 2384 goto encode_op;
2385 }
b591480b 2386
2336745e
KM		 2387 fh_clear_wcc(current_fh);
2388
58e7b33a 2389 /* If op is non-idempotent */
f4f9ef4a 2390 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 2391 /*
a8095f7e
BF		 2392 * Don't execute this op if we couldn't encode a
2393 * succesful reply:
2394 */
f4f9ef4a 2395 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 2396 /*
2397 * Plus if there's another operation, make sure
4c69d585
BF		 2398 * we'll have space to at least encode an error:
2399 */
2400 if (resp->opcnt < args->opcnt)
2401 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 2402 op->status = nfsd4_check_resp_size(resp, plen);
2403 }
2404
2405 if (op->status)
2406 goto encode_op;
2407
f4f9ef4a
BF		 2408 if (op->opdesc->op_get_currentstateid)
2409 op->opdesc->op_get_currentstateid(cstate, &op->u);
2410 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 2411
9a307403
BF		 2412 /* Only from SEQUENCE */
2413 if (cstate->status == nfserr_replay_cache) {
2414 dprintk("%s NFS4.1 replay from cache\n", __func__);
2415 status = op->status;
2416 goto out;
2417 }
8b70484c 2418 if (!op->status) {
f4f9ef4a
BF		 2419 if (op->opdesc->op_set_currentstateid)
2420 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 2421
f4f9ef4a 2422 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 2423 clear_current_stateid(cstate);
8b70484c 2424
d781e3df
BF		 2425 if (current_fh->fh_export &&
2426 need_wrongsec_check(rqstp))
4daeed25 2427 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 2428 }
1da177e4 2429encode_op:
a90b061c 2430 if (op->status == nfserr_replay_me) {
a4f1706a 2431 op->replay = &cstate->replay_owner->so_replay;
bddfdbcd 2432 nfsd4_encode_replay(resp->xdr, op);
1da177e4
LT		 2433 status = op->status = op->replay->rp_status;
2434 } else {
2435 nfsd4_encode_operation(resp, op);
2436 status = op->status;
2437 }
0407717d 2438
fff4080b
CL		 2439 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2440 nfsd4_op_name(op->opnum));
0407717d 2441
58fb12e6 2442 nfsd4_cstate_clear_replay(cstate);
e2b20950 2443 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 2444 }
2445
4daeed25
KM		 2446 fh_put(current_fh);
2447 fh_put(save_fh);
2448 BUG_ON(cstate->replay_owner);
1da177e4 2449out:
cc028a10 2450 cstate->status = status;
2f425878 2451 /* Reset deferral mechanism for RPC deferrals */
30660e04 2452 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
cc028a10 2453 return rpc_success;
1da177e4
LT		 2454}
2455
58e7b33a
MJ		 2456#define op_encode_hdr_size (2)
2457#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2458#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2459#define op_encode_change_info_maxsz (5)
2460#define nfs4_fattr_bitmap_maxsz (4)
2461
8c7424cf
BF		 2462/* We'll fall back on returning no lockowner if run out of space: */
2463#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 2464#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2465
2466#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2467
2468#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2469#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2470 op_encode_ace_maxsz)
2471
2472#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2473
2474static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2475{
2476 return (op_encode_hdr_size) * sizeof(__be32);
2477}
2478
2479static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2480{
2481 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2482}
2483
2282cd2c
KM		 2484static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2485{
2486 /* ac_supported, ac_resp_access */
2487 return (op_encode_hdr_size + 2)* sizeof(__be32);
2488}
2489
58e7b33a
MJ		 2490static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2491{
2492 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2493}
2494
2495static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2496{
2497 return (op_encode_hdr_size + op_encode_change_info_maxsz
2498 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2499}
2500
b86cef60
BF		 2501/*
2502 * Note since this is an idempotent operation we won't insist on failing
2503 * the op prematurely if the estimate is too large. We may turn off splice
2504 * reads unnecessarily.
2505 */
2506static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2507 struct nfsd4_op *op)
2508{
2509 u32 *bmap = op->u.getattr.ga_bmval;
2510 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2511 u32 ret = 0;
2512
2513 if (bmap0 & FATTR4_WORD0_ACL)
2514 return svc_max_payload(rqstp);
2515 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2516 return svc_max_payload(rqstp);
2517
2518 if (bmap1 & FATTR4_WORD1_OWNER) {
2519 ret += IDMAP_NAMESZ + 4;
2520 bmap1 &= ~FATTR4_WORD1_OWNER;
2521 }
2522 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2523 ret += IDMAP_NAMESZ + 4;
2524 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2525 }
2526 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2527 ret += NFS4_FHSIZE + 4;
2528 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2529 }
2530 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 2531 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 2532 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2533 }
2534 /*
2535 * Largest of remaining attributes are 16 bytes (e.g.,
2536 * supported_attributes)
2537 */
2538 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2539 /* bitmask, length */
2540 ret += 20;
2541 return ret;
2542}
2543
2282cd2c
KM		 2544static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2545{
2546 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2547}
2548
58e7b33a
MJ		 2549static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2550{
2551 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2552 * sizeof(__be32);
2553}
2554
2555static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2556{
2557 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2558 * sizeof(__be32);
2559}
2560
2561static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2562{
2563 return (op_encode_hdr_size + op_encode_stateid_maxsz
2564 + op_encode_change_info_maxsz + 1
2565 + nfs4_fattr_bitmap_maxsz
2566 + op_encode_delegation_maxsz) * sizeof(__be32);
2567}
2568
2569static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2570{
2571 u32 maxcount = 0, rlen = 0;
2572
2573 maxcount = svc_max_payload(rqstp);
3c7aa15d 2574 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 2575
622f560e 2576 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2577}
2578
528b8493
AS		 2579static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2580{
2581 u32 maxcount = svc_max_payload(rqstp);
2582 u32 rlen = min(op->u.read.rd_length, maxcount);
2583 /*
2584 * If we detect that the file changed during hole encoding, then we
2585 * recover by encoding the remaining reply as data. This means we need
2586 * to set aside enough room to encode two data segments.
2587 */
2588 u32 seg_len = 2 * (1 + 2 + 1);
2589
2590 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32);
2591}
2592
58e7b33a
MJ		 2593static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2594{
3c7aa15d 2595 u32 maxcount = 0, rlen = 0;
58e7b33a 2596
3c7aa15d
KM		 2597 maxcount = svc_max_payload(rqstp);
2598 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 2599
561f0ed4
BF		 2600 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2601 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2602}
2603
2282cd2c
KM		 2604static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2605{
2606 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2607}
2608
58e7b33a
MJ		 2609static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2610{
2611 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2612 * sizeof(__be32);
2613}
2614
2615static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2616{
2617 return (op_encode_hdr_size + op_encode_change_info_maxsz
2618 + op_encode_change_info_maxsz) * sizeof(__be32);
2619}
2620
ccae70a9
BF		 2621static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2622 struct nfsd4_op *op)
2623{
d1d84c96
BF		 2624 return (op_encode_hdr_size
2625 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 2626}
2627
2282cd2c
KM		 2628static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2629{
2630 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2631 * sizeof(__be32);
2632}
2633
58e7b33a
MJ		 2634static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2635{
2636 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2637}
2638
2282cd2c
KM		 2639static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2640{
2641 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2642 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2643}
2644
58e7b33a
MJ		 2645static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2646{
480efaee
BF		 2647 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2648 sizeof(__be32);
58e7b33a
MJ		 2649}
2650
2651static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2652{
f34e432b 2653 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2654}
2655
2656static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2657{
2658 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2659 1 + 1 + /* eir_flags, spr_how */\
2660 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2661 2 + /*eir_server_owner.so_minor_id */\
2662 /* eir_server_owner.so_major_id<> */\
2663 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2664 /* eir_server_scope<> */\
2665 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2666 1 + /* eir_server_impl_id array length */\
2667 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2668}
2669
2670static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2671{
2672 return (op_encode_hdr_size + \
2673 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2674 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2675}
2676
2677static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2678{
2679 return (op_encode_hdr_size + \
2680 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2681 2 + /* csr_sequence, csr_flags */\
2682 op_encode_channel_attrs_maxsz + \
2683 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2684}
2685
29ae7f9d
AS		 2686static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2687{
2688 return (op_encode_hdr_size +
2689 1 /* wr_callback */ +
2690 op_encode_stateid_maxsz /* wr_callback */ +
2691 2 /* wr_count */ +
2692 1 /* wr_committed */ +
2693 op_encode_verifier_maxsz +
2694 1 /* cr_consecutive */ +
2695 1 /* cr_synchronous */) * sizeof(__be32);
2696}
2697
6308bc98
OK		 2698static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2699 struct nfsd4_op *op)
2700{
2701 return (op_encode_hdr_size +
2702 2 /* osr_count */ +
2703 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2704}
2705
51911868
OK		 2706static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2707 struct nfsd4_op *op)
2708{
2709 return (op_encode_hdr_size +
2710 3 /* cnr_lease_time */ +
2711 1 /* We support one cnr_source_server */ +
2712 1 /* cnr_stateid seq */ +
2713 op_encode_stateid_maxsz /* cnr_stateid */ +
2714 1 /* num cnr_source_server*/ +
2715 1 /* nl4_type */ +
2716 1 /* nl4 size */ +
2717 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2718 * sizeof(__be32);
2719}
2720
9cf514cc 2721#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2722static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2723{
2724 u32 maxcount = 0, rlen = 0;
2725
2726 maxcount = svc_max_payload(rqstp);
2727 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2728
2729 return (op_encode_hdr_size +
2730 1 /* gd_layout_type*/ +
2731 XDR_QUADLEN(rlen) +
2732 2 /* gd_notify_types */) * sizeof(__be32);
2733}
2734
9cf514cc
CH		 2735/*
2736 * At this stage we don't really know what layout driver will handle the request,
2737 * so we need to define an arbitrary upper bound here.
2738 */
2739#define MAX_LAYOUT_SIZE 128
2740static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2741{
2742 return (op_encode_hdr_size +
2743 1 /* logr_return_on_close */ +
2744 op_encode_stateid_maxsz +
2745 1 /* nr of layouts */ +
2746 MAX_LAYOUT_SIZE) * sizeof(__be32);
2747}
2748
2749static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2750{
2751 return (op_encode_hdr_size +
2752 1 /* locr_newsize */ +
2753 2 /* ns_size */) * sizeof(__be32);
2754}
2755
2756static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2757{
2758 return (op_encode_hdr_size +
2759 1 /* lrs_stateid */ +
2760 op_encode_stateid_maxsz) * sizeof(__be32);
2761}
2762#endif /* CONFIG_NFSD_PNFS */
2763
2282cd2c
KM		 2764
2765static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2766{
2767 return (op_encode_hdr_size + 3) * sizeof(__be32);
2768}
2769
23e50fe3
FL		 2770static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2771 struct nfsd4_op *op)
2772{
2773 u32 maxcount, rlen;
2774
2775 maxcount = svc_max_payload(rqstp);
2776 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2777
2778 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2779}
2780
2781static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2782 struct nfsd4_op *op)
2783{
2784 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2785 * sizeof(__be32);
2786}
2787static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2788 struct nfsd4_op *op)
2789{
2790 u32 maxcount, rlen;
2791
2792 maxcount = svc_max_payload(rqstp);
2793 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2794
2795 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2796}
2797
2798static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2799 struct nfsd4_op *op)
2800{
2801 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2802 * sizeof(__be32);
2803}
2804
2805
bb2a8b0c 2806static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2807 [OP_ACCESS] = {
eb69853d 2808 .op_func = nfsd4_access,
b001a1b6 2809 .op_name = "OP_ACCESS",
1c122638 2810 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2811 },
2812 [OP_CLOSE] = {
eb69853d 2813 .op_func = nfsd4_close,
58e7b33a 2814 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2815 .op_name = "OP_CLOSE",
1c122638 2816 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2817 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2818 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2819 },
2820 [OP_COMMIT] = {
eb69853d 2821 .op_func = nfsd4_commit,
58e7b33a 2822 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2823 .op_name = "OP_COMMIT",
1c122638 2824 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2825 },
2826 [OP_CREATE] = {
eb69853d 2827 .op_func = nfsd4_create,
d1471053 2828 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2829 .op_name = "OP_CREATE",
1c122638 2830 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2831 },
2832 [OP_DELEGRETURN] = {
eb69853d 2833 .op_func = nfsd4_delegreturn,
58e7b33a 2834 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2835 .op_name = "OP_DELEGRETURN",
58e7b33a 2836 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2837 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2838 },
2839 [OP_GETATTR] = {
eb69853d 2840 .op_func = nfsd4_getattr,
eeac294e 2841 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2842 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2843 .op_name = "OP_GETATTR",
b591480b
BF		 2844 },
2845 [OP_GETFH] = {
eb69853d 2846 .op_func = nfsd4_getfh,
b001a1b6 2847 .op_name = "OP_GETFH",
1c122638 2848 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2849 },
2850 [OP_LINK] = {
eb69853d 2851 .op_func = nfsd4_link,
c856694e
BF		 2852 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2853 | OP_CACHEME,
b001a1b6 2854 .op_name = "OP_LINK",
1c122638 2855 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2856 },
2857 [OP_LOCK] = {
eb69853d 2858 .op_func = nfsd4_lock,
b7571e4c
BF		 2859 .op_flags = OP_MODIFIES_SOMETHING |
2860 OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2861 .op_name = "OP_LOCK",
1c122638 2862 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2863 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2864 },
2865 [OP_LOCKT] = {
eb69853d 2866 .op_func = nfsd4_lockt,
b7571e4c 2867 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2868 .op_name = "OP_LOCKT",
1c122638 2869 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2870 },
2871 [OP_LOCKU] = {
eb69853d 2872 .op_func = nfsd4_locku,
58e7b33a 2873 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2874 .op_name = "OP_LOCKU",
1c122638 2875 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2876 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2877 },
2878 [OP_LOOKUP] = {
eb69853d 2879 .op_func = nfsd4_lookup,
d1471053 2880 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2881 .op_name = "OP_LOOKUP",
1c122638 2882 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2883 },
2884 [OP_LOOKUPP] = {
eb69853d 2885 .op_func = nfsd4_lookupp,
d1471053 2886 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2887 .op_name = "OP_LOOKUPP",
1c122638 2888 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2889 },
2890 [OP_NVERIFY] = {
eb69853d 2891 .op_func = nfsd4_nverify,
b001a1b6 2892 .op_name = "OP_NVERIFY",
1c122638 2893 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2894 },
2895 [OP_OPEN] = {
eb69853d 2896 .op_func = nfsd4_open,
58e7b33a 2897 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2898 .op_name = "OP_OPEN",
1c122638 2899 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2900 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2901 },
2902 [OP_OPEN_CONFIRM] = {
eb69853d 2903 .op_func = nfsd4_open_confirm,
58e7b33a 2904 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2905 .op_name = "OP_OPEN_CONFIRM",
1c122638 2906 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2907 },
2908 [OP_OPEN_DOWNGRADE] = {
eb69853d 2909 .op_func = nfsd4_open_downgrade,
58e7b33a 2910 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2911 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2912 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2913 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2914 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2915 },
2916 [OP_PUTFH] = {
eb69853d 2917 .op_func = nfsd4_putfh,
68d93184 2918 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2919 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2920 .op_name = "OP_PUTFH",
1c122638 2921 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2922 },
eeac294e 2923 [OP_PUTPUBFH] = {
eb69853d 2924 .op_func = nfsd4_putrootfh,
68d93184 2925 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2926 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2927 .op_name = "OP_PUTPUBFH",
1c122638 2928 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2929 },
b591480b 2930 [OP_PUTROOTFH] = {
eb69853d 2931 .op_func = nfsd4_putrootfh,
68d93184 2932 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2933 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2934 .op_name = "OP_PUTROOTFH",
1c122638 2935 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2936 },
2937 [OP_READ] = {
eb69853d 2938 .op_func = nfsd4_read,
34b1744c 2939 .op_release = nfsd4_read_release,
b001a1b6 2940 .op_name = "OP_READ",
1c122638 2941 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2942 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2943 },
2944 [OP_READDIR] = {
eb69853d 2945 .op_func = nfsd4_readdir,
b001a1b6 2946 .op_name = "OP_READDIR",
1c122638 2947 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2948 },
2949 [OP_READLINK] = {
eb69853d 2950 .op_func = nfsd4_readlink,
b001a1b6 2951 .op_name = "OP_READLINK",
1c122638 2952 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2953 },
2954 [OP_REMOVE] = {
eb69853d 2955 .op_func = nfsd4_remove,
c856694e 2956 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2957 .op_name = "OP_REMOVE",
1c122638 2958 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2959 },
2960 [OP_RENAME] = {
eb69853d 2961 .op_func = nfsd4_rename,
c856694e 2962 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2963 .op_name = "OP_RENAME",
1c122638 2964 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2965 },
2966 [OP_RENEW] = {
eb69853d 2967 .op_func = nfsd4_renew,
58e7b33a
MJ		 2968 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2969 | OP_MODIFIES_SOMETHING,
b001a1b6 2970 .op_name = "OP_RENEW",
1c122638 2971 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2972
b591480b
BF		 2973 },
2974 [OP_RESTOREFH] = {
eb69853d 2975 .op_func = nfsd4_restorefh,
68d93184 2976 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2977 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2978 .op_name = "OP_RESTOREFH",
1c122638 2979 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2980 },
2981 [OP_SAVEFH] = {
eb69853d 2982 .op_func = nfsd4_savefh,
58e7b33a 2983 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2984 .op_name = "OP_SAVEFH",
1c122638 2985 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2986 },
dcb488a3 2987 [OP_SECINFO] = {
eb69853d 2988 .op_func = nfsd4_secinfo,
34b1744c 2989 .op_release = nfsd4_secinfo_release,
68d93184 2990 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2991 .op_name = "OP_SECINFO",
1c122638 2992 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2993 },
b591480b 2994 [OP_SETATTR] = {
eb69853d 2995 .op_func = nfsd4_setattr,
b001a1b6 2996 .op_name = "OP_SETATTR",
b7571e4c
BF		 2997 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2998 | OP_NONTRIVIAL_ERROR_ENCODE,
1c122638 2999 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 3000 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 3001 },
3002 [OP_SETCLIENTID] = {
eb69853d 3003 .op_func = nfsd4_setclientid,
58e7b33a 3004 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
b7571e4c
BF		 3005 | OP_MODIFIES_SOMETHING | OP_CACHEME
3006 | OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 3007 .op_name = "OP_SETCLIENTID",
1c122638 3008 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 3009 },
3010 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 3011 .op_func = nfsd4_setclientid_confirm,
58e7b33a 3012 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 3013 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 3014 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 3015 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 3016 },
3017 [OP_VERIFY] = {
eb69853d 3018 .op_func = nfsd4_verify,
b001a1b6 3019 .op_name = "OP_VERIFY",
1c122638 3020 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 3021 },
3022 [OP_WRITE] = {
eb69853d 3023 .op_func = nfsd4_write,
c856694e 3024 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 3025 .op_name = "OP_WRITE",
1c122638 3026 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 3027 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 3028 },
3029 [OP_RELEASE_LOCKOWNER] = {
eb69853d 3030 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 3031 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3032 | OP_MODIFIES_SOMETHING,
b001a1b6 3033 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 3034 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 3035 },
069b6ad4
AA		 3036
3037 /* NFSv4.1 operations */
3038 [OP_EXCHANGE_ID] = {
eb69853d 3039 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 3040 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3041 | OP_MODIFIES_SOMETHING,
069b6ad4 3042 .op_name = "OP_EXCHANGE_ID",
1c122638 3043 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 3044 },
cb73a9f4 3045 [OP_BACKCHANNEL_CTL] = {
eb69853d 3046 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 3047 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3048 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 3049 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 3050 },
1d1bc8f2 3051 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 3052 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 3053 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3054 | OP_MODIFIES_SOMETHING,
1d1bc8f2 3055 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 3056 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 3057 },
069b6ad4 3058 [OP_CREATE_SESSION] = {
eb69853d 3059 .op_func = nfsd4_create_session,
58e7b33a
MJ		 3060 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3061 | OP_MODIFIES_SOMETHING,
069b6ad4 3062 .op_name = "OP_CREATE_SESSION",
1c122638 3063 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 3064 },
3065 [OP_DESTROY_SESSION] = {
eb69853d 3066 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 3067 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3068 | OP_MODIFIES_SOMETHING,
069b6ad4 3069 .op_name = "OP_DESTROY_SESSION",
1c122638 3070 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 3071 },
3072 [OP_SEQUENCE] = {
eb69853d 3073 .op_func = nfsd4_sequence,
f9bb94c4 3074 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 3075 .op_name = "OP_SEQUENCE",
1c122638 3076 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 3077 },
094b5d74 3078 [OP_DESTROY_CLIENTID] = {
eb69853d 3079 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 3080 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3081 | OP_MODIFIES_SOMETHING,
094b5d74 3082 .op_name = "OP_DESTROY_CLIENTID",
1c122638 3083 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 3084 },
4dc6ec00 3085 [OP_RECLAIM_COMPLETE] = {
eb69853d 3086 .op_func = nfsd4_reclaim_complete,
58e7b33a 3087 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 3088 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 3089 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 3090 },
04f4ad16 3091 [OP_SECINFO_NO_NAME] = {
eb69853d 3092 .op_func = nfsd4_secinfo_no_name,
ec572b9e 3093 .op_release = nfsd4_secinfo_no_name_release,
68d93184 3094 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 3095 .op_name = "OP_SECINFO_NO_NAME",
1c122638 3096 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 3097 },
17456804 3098 [OP_TEST_STATEID] = {
eb69853d 3099 .op_func = nfsd4_test_stateid,
17456804
BS		 3100 .op_flags = ALLOWED_WITHOUT_FH,
3101 .op_name = "OP_TEST_STATEID",
1c122638 3102 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 3103 },
e1ca12df 3104 [OP_FREE_STATEID] = {
eb69853d 3105 .op_func = nfsd4_free_stateid,
58e7b33a 3106 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 3107 .op_name = "OP_FREE_STATEID",
57832e7b 3108 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 3109 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 3110 },
9cf514cc
CH		 3111#ifdef CONFIG_NFSD_PNFS
3112 [OP_GETDEVICEINFO] = {
eb69853d 3113 .op_func = nfsd4_getdeviceinfo,
34b1744c 3114 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 3115 .op_flags = ALLOWED_WITHOUT_FH,
3116 .op_name = "OP_GETDEVICEINFO",
1c122638 3117 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 3118 },
3119 [OP_LAYOUTGET] = {
eb69853d 3120 .op_func = nfsd4_layoutget,
34b1744c 3121 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 3122 .op_flags = OP_MODIFIES_SOMETHING,
3123 .op_name = "OP_LAYOUTGET",
1c122638 3124 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 3125 },
3126 [OP_LAYOUTCOMMIT] = {
eb69853d 3127 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 3128 .op_flags = OP_MODIFIES_SOMETHING,
3129 .op_name = "OP_LAYOUTCOMMIT",
1c122638 3130 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 3131 },
3132 [OP_LAYOUTRETURN] = {
eb69853d 3133 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 3134 .op_flags = OP_MODIFIES_SOMETHING,
3135 .op_name = "OP_LAYOUTRETURN",
1c122638 3136 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 3137 },
3138#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 3139
3140 /* NFSv4.2 operations */
95d871f0 3141 [OP_ALLOCATE] = {
eb69853d 3142 .op_func = nfsd4_allocate,
03b31f48 3143 .op_flags = OP_MODIFIES_SOMETHING,
95d871f0 3144 .op_name = "OP_ALLOCATE",
1c122638 3145 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 3146 },
b0cb9085 3147 [OP_DEALLOCATE] = {
eb69853d 3148 .op_func = nfsd4_deallocate,
03b31f48 3149 .op_flags = OP_MODIFIES_SOMETHING,
b0cb9085 3150 .op_name = "OP_DEALLOCATE",
1c122638 3151 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 3152 },
ffa0160a 3153 [OP_CLONE] = {
eb69853d 3154 .op_func = nfsd4_clone,
03b31f48 3155 .op_flags = OP_MODIFIES_SOMETHING,
ffa0160a 3156 .op_name = "OP_CLONE",
1c122638 3157 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 3158 },
29ae7f9d 3159 [OP_COPY] = {
eb69853d 3160 .op_func = nfsd4_copy,
03b31f48 3161 .op_flags = OP_MODIFIES_SOMETHING,
29ae7f9d 3162 .op_name = "OP_COPY",
1c122638 3163 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 3164 },
528b8493
AS		 3165 [OP_READ_PLUS] = {
3166 .op_func = nfsd4_read,
3167 .op_release = nfsd4_read_release,
3168 .op_name = "OP_READ_PLUS",
3169 .op_rsize_bop = nfsd4_read_plus_rsize,
3170 .op_get_currentstateid = nfsd4_get_readstateid,
3171 },
24bab491 3172 [OP_SEEK] = {
eb69853d 3173 .op_func = nfsd4_seek,
24bab491 3174 .op_name = "OP_SEEK",
1c122638 3175 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 3176 },
6308bc98
OK		 3177 [OP_OFFLOAD_STATUS] = {
3178 .op_func = nfsd4_offload_status,
3179 .op_name = "OP_OFFLOAD_STATUS",
3180 .op_rsize_bop = nfsd4_offload_status_rsize,
3181 },
885e2bf3
OK		 3182 [OP_OFFLOAD_CANCEL] = {
3183 .op_func = nfsd4_offload_cancel,
3184 .op_flags = OP_MODIFIES_SOMETHING,
3185 .op_name = "OP_OFFLOAD_CANCEL",
3186 .op_rsize_bop = nfsd4_only_status_rsize,
3187 },
51911868
OK		 3188 [OP_COPY_NOTIFY] = {
3189 .op_func = nfsd4_copy_notify,
3190 .op_flags = OP_MODIFIES_SOMETHING,
3191 .op_name = "OP_COPY_NOTIFY",
3192 .op_rsize_bop = nfsd4_copy_notify_rsize,
3193 },
23e50fe3
FL		 3194 [OP_GETXATTR] = {
3195 .op_func = nfsd4_getxattr,
3196 .op_name = "OP_GETXATTR",
3197 .op_rsize_bop = nfsd4_getxattr_rsize,
3198 },
3199 [OP_SETXATTR] = {
3200 .op_func = nfsd4_setxattr,
3201 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3202 .op_name = "OP_SETXATTR",
3203 .op_rsize_bop = nfsd4_setxattr_rsize,
3204 },
3205 [OP_LISTXATTRS] = {
3206 .op_func = nfsd4_listxattrs,
3207 .op_name = "OP_LISTXATTRS",
3208 .op_rsize_bop = nfsd4_listxattrs_rsize,
3209 },
3210 [OP_REMOVEXATTR] = {
3211 .op_func = nfsd4_removexattr,
3212 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3213 .op_name = "OP_REMOVEXATTR",
3214 .op_rsize_bop = nfsd4_removexattr_rsize,
3215 },
b591480b
BF		 3216};
3217
ed941643
AE		 3218/**
3219 * nfsd4_spo_must_allow - Determine if the compound op contains an
3220 * operation that is allowed to be sent with machine credentials
3221 *
3222 * @rqstp: a pointer to the struct svc_rqst
3223 *
3224 * Checks to see if the compound contains a spo_must_allow op
3225 * and confirms that it was sent with the proper machine creds.
3226 */
3227
3228bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3229{
3230 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3231 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3232 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
3233 struct nfsd4_compound_state *cstate = &resp->cstate;
3234 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3235 u32 opiter;
3236
3237 if (!cstate->minorversion)
3238 return false;
3239
44b49aa6 3240 if (cstate->spo_must_allowed)
ed941643
AE		 3241 return true;
3242
3243 opiter = resp->opcnt;
3244 while (opiter < argp->opcnt) {
3245 this = &argp->ops[opiter++];
3246 if (test_bit(this->opnum, allow->u.longs) &&
3247 cstate->clp->cl_mach_cred &&
3248 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3249 cstate->spo_must_allowed = true;
3250 return true;
3251 }
3252 }
3253 cstate->spo_must_allowed = false;
3254 return false;
3255}
3256
4f0cefbf
BF		 3257int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3258{
05b7278d 3259 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 3260 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 3261
3262 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3263 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 3264}
3265
07d1f802
BF		 3266void warn_on_nonidempotent_op(struct nfsd4_op *op)
3267{
3268 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3a237b4a 3269 pr_err("unable to encode reply to nonidempotent op %u (%s)\n",
07d1f802
BF		 3270 op->opnum, nfsd4_op_name(op->opnum));
3271 WARN_ON_ONCE(1);
3272 }
3273}
3274
f1c7f79b 3275static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 3276{
3277 if (opnum < ARRAY_SIZE(nfsd4_ops))
3278 return nfsd4_ops[opnum].op_name;
3279 return "unknown_operation";
3280}
3281
860bda29 3282static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 3283 [NFSPROC4_NULL] = {
f7235b6b 3284 .pc_func = nfsd4_proc_null,
788f7183
CL		 3285 .pc_decode = nfssvc_decode_voidarg,
3286 .pc_encode = nfssvc_encode_voidres,
3287 .pc_argsize = sizeof(struct nfsd_voidargs),
3288 .pc_ressize = sizeof(struct nfsd_voidres),
0a93a47f
YZ		 3289 .pc_cachetype = RC_NOCACHE,
3290 .pc_xdrressize = 1,
2289e87b 3291 .pc_name = "NULL",
0a93a47f
YZ		 3292 },
3293 [NFSPROC4_COMPOUND] = {
f7235b6b 3294 .pc_func = nfsd4_proc_compound,
026fec7e 3295 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 3296 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 3297 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3298 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 3299 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 3300 .pc_cachetype = RC_NOCACHE,
3301 .pc_xdrressize = NFSD_BUFSIZE/4,
2289e87b 3302 .pc_name = "COMPOUND",
0a93a47f 3303 },
1da177e4
LT		 3304};
3305
7fd38af9 3306static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 3307const struct svc_version nfsd_version4 = {
5283b03e
JL		 3308 .vs_vers = 4,
3309 .vs_nproc = 2,
3310 .vs_proc = nfsd_procedures4,
7fd38af9 3311 .vs_count = nfsd_count3,
5283b03e
JL		 3312 .vs_dispatch = nfsd_dispatch,
3313 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3314 .vs_rpcb_optnl = true,
3315 .vs_need_cong_ctrl = true,
1da177e4
LT		 3316};
3317
3318/*
3319 * Local variables:
3320 * c-basic-offset: 8
3321 * End:
3322 */
Michael's Linux tree.