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nfsd: Fix a soft lockup race in nfsd_file_mark_find_or_create()
[people/ms/linux.git] / fs / nfsd / nfs4proc.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4 34 */
880a3a53 35#include <linux/fs_struct.h>
7e06b7f9 36#include <linux/file.h>
b0cb9085 37#include <linux/falloc.h>
5a0e3ad6 38#include <linux/slab.h>
e0639dc5 39#include <linux/kthread.h>
624322f1 40#include <linux/sunrpc/addr.h>
1da177e4 41
58e7b33a 42#include "idmap.h"
9a74af21
BH		 43#include "cache.h"
44#include "xdr4.h"
0a3adade 45#include "vfs.h"
8b70484c 46#include "current_stateid.h"
3320fef1 47#include "netns.h"
4ac7249e 48#include "acl.h"
9cf514cc 49#include "pnfs.h"
31ef83dc 50#include "trace.h"
1da177e4 51
18032ca0
DQ		 52#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
53#include <linux/security.h>
54
55static inline void
56nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
57{
2b0143b5 58 struct inode *inode = d_inode(resfh->fh_dentry);
18032ca0
DQ		 59 int status;
60
5955102c 61 inode_lock(inode);
18032ca0
DQ		 62 status = security_inode_setsecctx(resfh->fh_dentry,
63 label->data, label->len);
5955102c 64 inode_unlock(inode);
18032ca0
DQ		 65
66 if (status)
67 /*
68 * XXX: We should really fail the whole open, but we may
69 * already have created a new file, so it may be too
70 * late. For now this seems the least of evils:
71 */
72 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
73
74 return;
75}
76#else
77static inline void
78nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval)
79{ }
80#endif
81
1da177e4
LT		 82#define NFSDDBG_FACILITY NFSDDBG_PROC
83
3c8e0316
YZ		 84static u32 nfsd_attrmask[] = {
85 NFSD_WRITEABLE_ATTRS_WORD0,
86 NFSD_WRITEABLE_ATTRS_WORD1,
87 NFSD_WRITEABLE_ATTRS_WORD2
88};
89
90static u32 nfsd41_ex_attrmask[] = {
91 NFSD_SUPPATTR_EXCLCREAT_WORD0,
92 NFSD_SUPPATTR_EXCLCREAT_WORD1,
93 NFSD_SUPPATTR_EXCLCREAT_WORD2
94};
95
96static __be32
97check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
98 u32 *bmval, u32 *writable)
99{
100 struct dentry *dentry = cstate->current_fh.fh_dentry;
32ddd944 101 struct svc_export *exp = cstate->current_fh.fh_export;
3c8e0316 102
916d2d84 103 if (!nfsd_attrs_supported(cstate->minorversion, bmval))
3c8e0316 104 return nfserr_attrnotsupp;
916d2d84
BF		 105 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
106 return nfserr_attrnotsupp;
32ddd944
BF		 107 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
108 !(exp->ex_flags & NFSEXP_SECURITY_LABEL))
109 return nfserr_attrnotsupp;
916d2d84
BF		 110 if (writable && !bmval_is_subset(bmval, writable))
111 return nfserr_inval;
47057abd
AG		 112 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
113 (bmval[1] & FATTR4_WORD1_MODE))
114 return nfserr_inval;
3c8e0316
YZ		 115 return nfs_ok;
116}
117
118static __be32
119nfsd4_check_open_attributes(struct svc_rqst *rqstp,
120 struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
121{
122 __be32 status = nfs_ok;
123
124 if (open->op_create == NFS4_OPEN_CREATE) {
125 if (open->op_createmode == NFS4_CREATE_UNCHECKED
126 || open->op_createmode == NFS4_CREATE_GUARDED)
127 status = check_attr_support(rqstp, cstate,
128 open->op_bmval, nfsd_attrmask);
129 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1)
130 status = check_attr_support(rqstp, cstate,
131 open->op_bmval, nfsd41_ex_attrmask);
132 }
133
134 return status;
135}
136
9208faf2
YZ		 137static int
138is_create_with_attrs(struct nfsd4_open *open)
139{
140 return open->op_create == NFS4_OPEN_CREATE
141 && (open->op_createmode == NFS4_CREATE_UNCHECKED
142 || open->op_createmode == NFS4_CREATE_GUARDED
143 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1);
144}
145
146/*
147 * if error occurs when setting the acl, just clear the acl bit
148 * in the returned attr bitmap.
149 */
150static void
151do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp,
152 struct nfs4_acl *acl, u32 *bmval)
153{
154 __be32 status;
155
156 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl);
157 if (status)
158 /*
159 * We should probably fail the whole open at this point,
160 * but we've already created the file, so it's too late;
161 * So this seems the least of evils:
162 */
163 bmval[0] &= ~FATTR4_WORD0_ACL;
164}
165
1da177e4
LT		 166static inline void
167fh_dup2(struct svc_fh *dst, struct svc_fh *src)
168{
169 fh_put(dst);
170 dget(src->fh_dentry);
171 if (src->fh_export)
bf18f163 172 exp_get(src->fh_export);
1da177e4
LT		 173 *dst = *src;
174}
175
b37ad28b 176static __be32
dc730e17 177do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode)
1da177e4 178{
b37ad28b 179 __be32 status;
1da177e4
LT		 180
181 if (open->op_truncate &&
182 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE))
183 return nfserr_inval;
184
a043226b
BF		 185 accmode |= NFSD_MAY_READ_IF_EXEC;
186
1da177e4 187 if (open->op_share_access & NFS4_SHARE_ACCESS_READ)
8837abca 188 accmode |= NFSD_MAY_READ;
9801d8a3 189 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE)
8837abca 190 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC);
57ecb34f 191 if (open->op_share_deny & NFS4_SHARE_DENY_READ)
8837abca 192 accmode |= NFSD_MAY_WRITE;
1da177e4
LT		 193
194 status = fh_verify(rqstp, current_fh, S_IFREG, accmode);
195
196 return status;
197}
198
aadab6c6
BF		 199static __be32 nfsd_check_obj_isreg(struct svc_fh *fh)
200{
2b0143b5 201 umode_t mode = d_inode(fh->fh_dentry)->i_mode;
aadab6c6
BF		 202
203 if (S_ISREG(mode))
204 return nfs_ok;
205 if (S_ISDIR(mode))
206 return nfserr_isdir;
207 /*
208 * Using err_symlink as our catch-all case may look odd; but
209 * there's no other obvious error for this case in 4.0, and we
210 * happen to know that it will cause the linux v4 client to do
211 * the right thing on attempts to open something other than a
212 * regular file.
213 */
214 return nfserr_symlink;
215}
216
bbc9c36c
BF		 217static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh)
218{
219 if (nfsd4_has_session(cstate))
220 return;
221 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh,
222 &resfh->fh_handle);
223}
224
b37ad28b 225static __be32
c0e6bee4 226do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh)
1da177e4 227{
bbc9c36c 228 struct svc_fh *current_fh = &cstate->current_fh;
7007c90f 229 int accmode;
b37ad28b 230 __be32 status;
1da177e4 231
c0e6bee4
BF		 232 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL);
233 if (!*resfh)
59deeb9e 234 return nfserr_jukebox;
c0e6bee4 235 fh_init(*resfh, NFS4_FHSIZE);
500c2481 236 open->op_truncate = false;
1da177e4
LT		 237
238 if (open->op_create) {
79fb54ab
BH		 239 /* FIXME: check session persistence and pnfs flags.
240 * The nfsv4.1 spec requires the following semantics:
241 *
242 * Persistent | pNFS | Server REQUIRED | Client Allowed
243 * Reply Cache | server | |
244 * -------------+--------+-----------------+--------------------
245 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1
246 * | | | (SHOULD)
247 * | | and EXCLUSIVE4 | or EXCLUSIVE4
248 * | | | (SHOULD NOT)
249 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1
250 * yes | no | GUARDED4 | GUARDED4
251 * yes | yes | GUARDED4 | GUARDED4
252 */
253
1da177e4
LT		 254 /*
255 * Note: create modes (UNCHECKED,GUARDED...) are the same
ac6721a1 256 * in NFSv4 as in v3 except EXCLUSIVE4_1.
1da177e4 257 */
880a3a53 258 current->fs->umask = open->op_umask;
ac6721a1 259 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data,
1da177e4 260 open->op_fname.len, &open->op_iattr,
c0e6bee4 261 *resfh, open->op_createmode,
749997e5 262 (u32 *)open->op_verf.data,
856121b2 263 &open->op_truncate, &open->op_created);
880a3a53 264 current->fs->umask = 0;
749997e5 265
18032ca0 266 if (!status && open->op_label.len)
c0e6bee4 267 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval);
18032ca0 268
99f88726 269 /*
ead8fb8c
KM		 270 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4
271 * use the returned bitmask to indicate which attributes
272 * we used to store the verifier:
749997e5 273 */
ead8fb8c
KM		 274 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0)
275 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS |
276 FATTR4_WORD1_TIME_MODIFY);
4335723e
BF		 277 } else
278 /*
279 * Note this may exit with the parent still locked.
280 * We will hold the lock until nfsd4_open's final
281 * lookup, to prevent renames or unlinks until we've had
282 * a chance to an acquire a delegation if appropriate.
283 */
1da177e4 284 status = nfsd_lookup(rqstp, current_fh,
c0e6bee4 285 open->op_fname.data, open->op_fname.len, *resfh);
9dc4e6c4
BF		 286 if (status)
287 goto out;
c0e6bee4 288 status = nfsd_check_obj_isreg(*resfh);
af85852d
BF		 289 if (status)
290 goto out;
1da177e4 291
9208faf2 292 if (is_create_with_attrs(open) && open->op_acl != NULL)
c0e6bee4 293 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval);
9208faf2 294
c0e6bee4 295 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh);
7007c90f 296 accmode = NFSD_MAY_NOP;
89f6c336
BF		 297 if (open->op_created ||
298 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR)
7007c90f 299 accmode |= NFSD_MAY_OWNER_OVERRIDE;
c0e6bee4 300 status = do_open_permission(rqstp, *resfh, open, accmode);
41fd1e42 301 set_change_info(&open->op_cinfo, current_fh);
af85852d 302out:
1da177e4
LT		 303 return status;
304}
305
b37ad28b 306static __be32
bbc9c36c 307do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open)
1da177e4 308{
bbc9c36c 309 struct svc_fh *current_fh = &cstate->current_fh;
b37ad28b 310 __be32 status;
9f415eb2 311 int accmode = 0;
1da177e4 312
1da177e4
LT		 313 /* We don't know the target directory, and therefore can not
314 * set the change info
315 */
316
317 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info));
318
bbc9c36c 319 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh);
1da177e4
LT		 320
321 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) &&
322 (open->op_iattr.ia_size == 0);
9f415eb2
BF		 323 /*
324 * In the delegation case, the client is telling us about an
325 * open that it *already* performed locally, some time ago. We
326 * should let it succeed now if possible.
327 *
328 * In the case of a CLAIM_FH open, on the other hand, the client
329 * may be counting on us to enforce permissions (the Linux 4.1
330 * client uses this for normal opens, for example).
331 */
332 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH)
333 accmode = NFSD_MAY_OWNER_OVERRIDE;
1da177e4 334
9f415eb2 335 status = do_open_permission(rqstp, current_fh, open, accmode);
1da177e4
LT		 336
337 return status;
338}
339
60adfc50
AA		 340static void
341copy_clientid(clientid_t *clid, struct nfsd4_session *session)
342{
343 struct nfsd4_sessionid *sid =
344 (struct nfsd4_sessionid *)session->se_sessionid.data;
345
346 clid->cl_boot = sid->clientid.cl_boot;
347 clid->cl_id = sid->clientid.cl_id;
348}
1da177e4 349
7191155b 350static __be32
ca364317 351nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 352 union nfsd4_op_u *u)
1da177e4 353{
eb69853d 354 struct nfsd4_open *open = &u->open;
b37ad28b 355 __be32 status;
c0e6bee4 356 struct svc_fh *resfh = NULL;
3320fef1
SK		 357 struct net *net = SVC_NET(rqstp);
358 struct nfsd_net *nn = net_generic(net, nfsd_net_id);
03f318ca 359 bool reclaim = false;
6668958f 360
fe0750e5 361 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n",
1da177e4 362 (int)open->op_fname.len, open->op_fname.data,
fe0750e5 363 open->op_openowner);
1da177e4 364
1da177e4
LT		 365 /* This check required by spec. */
366 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL)
367 return nfserr_inval;
368
500c2481 369 open->op_created = false;
ab1350b2
MJ		 370 /*
371 * RFC5661 18.51.3
372 * Before RECLAIM_COMPLETE done, server should deny new lock
373 */
374 if (nfsd4_has_session(cstate) &&
a52d726b
JL		 375 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE,
376 &cstate->session->se_client->cl_flags) &&
ab1350b2
MJ		 377 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
378 return nfserr_grace;
379
60adfc50
AA		 380 if (nfsd4_has_session(cstate))
381 copy_clientid(&open->op_clientid, cstate->session);
382
1da177e4 383 /* check seqid for replay. set nfs4_owner */
6cd22668 384 status = nfsd4_process_open1(cstate, open, nn);
a90b061c 385 if (status == nfserr_replay_me) {
fe0750e5 386 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay;
ca364317 387 fh_put(&cstate->current_fh);
a4773c08
BF		 388 fh_copy_shallow(&cstate->current_fh.fh_handle,
389 &rp->rp_openfh);
8837abca 390 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 391 if (status)
392 dprintk("nfsd4_open: replay failed"
393 " restoring previous filehandle\n");
394 else
a90b061c 395 status = nfserr_replay_me;
1da177e4
LT		 396 }
397 if (status)
398 goto out;
9d313b17
BF		 399 if (open->op_xdr_error) {
400 status = open->op_xdr_error;
401 goto out;
402 }
fb553c0f 403
3c8e0316
YZ		 404 status = nfsd4_check_open_attributes(rqstp, cstate, open);
405 if (status)
406 goto out;
407
fb553c0f
BF		 408 /* Openowner is now set, so sequence id will get bumped. Now we need
409 * these checks before we do any creates: */
cbd0d51a 410 status = nfserr_grace;
c87fb4a3 411 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a
BF		 412 goto out;
413 status = nfserr_no_grace;
c87fb4a3 414 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS)
cbd0d51a 415 goto out;
fb553c0f 416
1da177e4 417 switch (open->op_claim_type) {
0dd3c192 418 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1da177e4 419 case NFS4_OPEN_CLAIM_NULL:
c0e6bee4 420 status = do_open_lookup(rqstp, cstate, open, &resfh);
1da177e4
LT		 421 if (status)
422 goto out;
423 break;
424 case NFS4_OPEN_CLAIM_PREVIOUS:
3320fef1 425 status = nfs4_check_open_reclaim(&open->op_clientid,
0fe492db 426 cstate, nn);
0cf99b91
MJ		 427 if (status)
428 goto out;
ba5378b6 429 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
03f318ca 430 reclaim = true;
0a4c9265 431 /* fall through */
8b289b2c
BF		 432 case NFS4_OPEN_CLAIM_FH:
433 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
bbc9c36c 434 status = do_open_fhandle(rqstp, cstate, open);
1da177e4
LT		 435 if (status)
436 goto out;
c0e6bee4 437 resfh = &cstate->current_fh;
1da177e4 438 break;
8b289b2c 439 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1da177e4 440 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
2fdada03 441 dprintk("NFSD: unsupported OPEN claim type %d\n",
1da177e4
LT		 442 open->op_claim_type);
443 status = nfserr_notsupp;
444 goto out;
445 default:
2fdada03 446 dprintk("NFSD: Invalid OPEN claim type %d\n",
1da177e4
LT		 447 open->op_claim_type);
448 status = nfserr_inval;
449 goto out;
450 }
451 /*
452 * nfsd4_process_open2() does the actual opening of the file. If
453 * successful, it (1) truncates the file if open->op_truncate was
454 * set, (2) sets open->op_stateid, (3) sets open->op_delegation.
455 */
c0e6bee4 456 status = nfsd4_process_open2(rqstp, resfh, open);
b3fbfe0e
JL		 457 WARN(status && open->op_created,
458 "nfsd4_process_open2 failed to open newly-created file! status=%u\n",
459 be32_to_cpu(status));
03f318ca
BF		 460 if (reclaim && !status)
461 nn->somebody_reclaimed = true;
1da177e4 462out:
c0e6bee4
BF		 463 if (resfh && resfh != &cstate->current_fh) {
464 fh_dup2(&cstate->current_fh, resfh);
465 fh_put(resfh);
466 kfree(resfh);
467 }
42297899 468 nfsd4_cleanup_open_state(cstate, open);
9411b1d4 469 nfsd4_bump_seqid(cstate, status);
1da177e4
LT		 470 return status;
471}
472
9d313b17
BF		 473/*
474 * OPEN is the only seqid-mutating operation whose decoding can fail
475 * with a seqid-mutating error (specifically, decoding of user names in
476 * the attributes). Therefore we have to do some processing to look up
477 * the stateowner so that we can bump the seqid.
478 */
479static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op)
480{
eb69853d 481 struct nfsd4_open *open = &op->u.open;
9d313b17
BF		 482
483 if (!seqid_mutating_err(ntohl(op->status)))
484 return op->status;
485 if (nfsd4_has_session(cstate))
486 return op->status;
487 open->op_xdr_error = op->status;
eb69853d 488 return nfsd4_open(rqstp, cstate, &op->u);
9d313b17
BF		 489}
490
1da177e4
LT		 491/*
492 * filehandle-manipulating ops.
493 */
7191155b 494static __be32
b591480b 495nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 496 union nfsd4_op_u *u)
1da177e4 497{
eb69853d 498 u->getfh = &cstate->current_fh;
1da177e4
LT		 499 return nfs_ok;
500}
501
7191155b 502static __be32
ca364317 503nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 504 union nfsd4_op_u *u)
1da177e4 505{
eb69853d 506 struct nfsd4_putfh *putfh = &u->putfh;
b9e8638e 507 __be32 ret;
eb69853d 508
ca364317
BF		 509 fh_put(&cstate->current_fh);
510 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen;
511 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval,
512 putfh->pf_fhlen);
b9e8638e
OK		 513 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS);
514#ifdef CONFIG_NFSD_V4_2_INTER_SSC
515 if (ret == nfserr_stale && putfh->no_verify) {
516 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN);
517 ret = 0;
518 }
519#endif
520 return ret;
1da177e4
LT		 521}
522
7191155b 523static __be32
b591480b 524nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 525 union nfsd4_op_u *u)
1da177e4 526{
b37ad28b 527 __be32 status;
1da177e4 528
ca364317 529 fh_put(&cstate->current_fh);
df547efb 530 status = exp_pseudoroot(rqstp, &cstate->current_fh);
1da177e4
LT		 531 return status;
532}
533
7191155b 534static __be32
b591480b 535nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 536 union nfsd4_op_u *u)
1da177e4 537{
ca364317 538 if (!cstate->save_fh.fh_dentry)
1da177e4
LT		 539 return nfserr_restorefh;
540
ca364317 541 fh_dup2(&cstate->current_fh, &cstate->save_fh);
51100d2b 542 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) {
37c593c5 543 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t));
51100d2b 544 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG);
37c593c5 545 }
1da177e4
LT		 546 return nfs_ok;
547}
548
7191155b 549static __be32
b591480b 550nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 551 union nfsd4_op_u *u)
1da177e4 552{
ca364317 553 fh_dup2(&cstate->save_fh, &cstate->current_fh);
51100d2b 554 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) {
37c593c5 555 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t));
51100d2b 556 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG);
37c593c5 557 }
1da177e4
LT		 558 return nfs_ok;
559}
560
561/*
562 * misc nfsv4 ops
563 */
7191155b 564static __be32
ca364317 565nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 566 union nfsd4_op_u *u)
1da177e4 567{
eb69853d
CH		 568 struct nfsd4_access *access = &u->access;
569
1da177e4
LT		 570 if (access->ac_req_access & ~NFS3_ACCESS_FULL)
571 return nfserr_inval;
572
573 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 574 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
575 &access->ac_supported);
1da177e4
LT		 576}
577
b9c0ef85 578static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1 579{
27c438f5 580 __be32 *verf = (__be32 *)verifier->data;
ab4684d1 581
27c438f5
TM		 582 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
583
584 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
ab4684d1
CL		 585}
586
7191155b 587static __be32
ca364317 588nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 589 union nfsd4_op_u *u)
1da177e4 590{
eb69853d
CH		 591 struct nfsd4_commit *commit = &u->commit;
592
b9c0ef85 593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp));
75c096f7 594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
ca364317 595 commit->co_count);
1da177e4
LT		 596}
597
b37ad28b 598static __be32
ca364317 599nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 600 union nfsd4_op_u *u)
1da177e4 601{
eb69853d 602 struct nfsd4_create *create = &u->create;
1da177e4 603 struct svc_fh resfh;
b37ad28b 604 __be32 status;
1da177e4
LT		 605 dev_t rdev;
606
607 fh_init(&resfh, NFS4_FHSIZE);
608
fa08139d 609 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 610 if (status)
611 return status;
612
3c8e0316
YZ		 613 status = check_attr_support(rqstp, cstate, create->cr_bmval,
614 nfsd_attrmask);
615 if (status)
616 return status;
617
880a3a53 618 current->fs->umask = create->cr_umask;
1da177e4
LT		 619 switch (create->cr_type) {
620 case NF4LNK:
ca364317
BF		 621 status = nfsd_symlink(rqstp, &cstate->current_fh,
622 create->cr_name, create->cr_namelen,
1e444f5b 623 create->cr_data, &resfh);
1da177e4
LT		 624 break;
625
626 case NF4BLK:
880a3a53 627 status = nfserr_inval;
1da177e4
LT		 628 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
629 if (MAJOR(rdev) != create->cr_specdata1 ||
630 MINOR(rdev) != create->cr_specdata2)
880a3a53 631 goto out_umask;
ca364317
BF		 632 status = nfsd_create(rqstp, &cstate->current_fh,
633 create->cr_name, create->cr_namelen,
634 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 635 break;
636
637 case NF4CHR:
880a3a53 638 status = nfserr_inval;
1da177e4
LT		 639 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
640 if (MAJOR(rdev) != create->cr_specdata1 ||
641 MINOR(rdev) != create->cr_specdata2)
880a3a53 642 goto out_umask;
ca364317
BF		 643 status = nfsd_create(rqstp, &cstate->current_fh,
644 create->cr_name, create->cr_namelen,
645 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 646 break;
647
648 case NF4SOCK:
ca364317
BF		 649 status = nfsd_create(rqstp, &cstate->current_fh,
650 create->cr_name, create->cr_namelen,
651 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 652 break;
653
654 case NF4FIFO:
ca364317
BF		 655 status = nfsd_create(rqstp, &cstate->current_fh,
656 create->cr_name, create->cr_namelen,
657 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 658 break;
659
660 case NF4DIR:
661 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 662 status = nfsd_create(rqstp, &cstate->current_fh,
663 create->cr_name, create->cr_namelen,
664 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 665 break;
666
667 default:
668 status = nfserr_badtype;
669 }
670
9208faf2
YZ		 671 if (status)
672 goto out;
1da177e4 673
18032ca0
DQ		 674 if (create->cr_label.len)
675 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
676
9208faf2
YZ		 677 if (create->cr_acl != NULL)
678 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
679 create->cr_bmval);
680
681 fh_unlock(&cstate->current_fh);
682 set_change_info(&create->cr_cinfo, &cstate->current_fh);
683 fh_dup2(&cstate->current_fh, &resfh);
684out:
1da177e4 685 fh_put(&resfh);
880a3a53
BF		 686out_umask:
687 current->fs->umask = 0;
1da177e4
LT		 688 return status;
689}
690
7191155b 691static __be32
ca364317 692nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 693 union nfsd4_op_u *u)
1da177e4 694{
eb69853d 695 struct nfsd4_getattr *getattr = &u->getattr;
b37ad28b 696 __be32 status;
1da177e4 697
8837abca 698 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 699 if (status)
700 return status;
701
702 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
703 return nfserr_inval;
704
916d2d84
BF		 705 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
706 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
707 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 708
ca364317 709 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 710 return nfs_ok;
711}
712
7191155b 713static __be32
ca364317 714nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 715 union nfsd4_op_u *u)
1da177e4 716{
eb69853d 717 struct nfsd4_link *link = &u->link;
95424460 718 __be32 status;
1da177e4 719
ca364317
BF		 720 status = nfsd_link(rqstp, &cstate->current_fh,
721 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 722 if (!status)
ca364317 723 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 724 return status;
725}
726
0ff7ab46 727static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 728{
729 struct svc_fh tmp_fh;
b37ad28b 730 __be32 ret;
1da177e4
LT		 731
732 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 733 ret = exp_pseudoroot(rqstp, &tmp_fh);
734 if (ret)
1da177e4 735 return ret;
0ff7ab46 736 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 737 fh_put(&tmp_fh);
738 return nfserr_noent;
739 }
740 fh_put(&tmp_fh);
0ff7ab46
BF		 741 return nfsd_lookup(rqstp, fh, "..", 2, fh);
742}
743
744static __be32
745nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 746 union nfsd4_op_u *u)
0ff7ab46
BF		 747{
748 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 749}
750
7191155b 751static __be32
ca364317 752nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 753 union nfsd4_op_u *u)
1da177e4 754{
ca364317 755 return nfsd_lookup(rqstp, &cstate->current_fh,
eb69853d 756 u->lookup.lo_name, u->lookup.lo_len,
ca364317 757 &cstate->current_fh);
1da177e4
LT		 758}
759
7191155b 760static __be32
ca364317 761nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 762 union nfsd4_op_u *u)
1da177e4 763{
eb69853d 764 struct nfsd4_read *read = &u->read;
b37ad28b 765 __be32 status;
1da177e4 766
5c4583b2 767 read->rd_nf = NULL;
1da177e4
LT		 768 if (read->rd_offset >= OFFSET_MAX)
769 return nfserr_inval;
770
87c5942e
CL		 771 trace_nfsd_read_start(rqstp, &cstate->current_fh,
772 read->rd_offset, read->rd_length);
773
9b3234b9
BF		 774 /*
775 * If we do a zero copy read, then a client will see read data
776 * that reflects the state of the file *after* performing the
777 * following compound.
778 *
779 * To ensure proper ordering, we therefore turn off zero copy if
780 * the client wants us to do more in this compound:
781 */
782 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 783 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 784
1da177e4 785 /* check stateid */
aa0d6aed
AS		 786 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
787 &read->rd_stateid, RD_STATE,
624322f1 788 &read->rd_nf, NULL);
af90f707 789 if (status) {
1da177e4
LT		 790 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
791 goto out;
792 }
793 status = nfs_ok;
794out:
1da177e4 795 read->rd_rqstp = rqstp;
ca364317 796 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 797 return status;
798}
799
34b1744c
BF		 800
801static void
802nfsd4_read_release(union nfsd4_op_u *u)
803{
5c4583b2
JL		 804 if (u->read.rd_nf)
805 nfsd_file_put(u->read.rd_nf);
87c5942e
CL		 806 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
807 u->read.rd_offset, u->read.rd_length);
34b1744c
BF		 808}
809
7191155b 810static __be32
ca364317 811nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 812 union nfsd4_op_u *u)
1da177e4 813{
eb69853d 814 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 815 u64 cookie = readdir->rd_cookie;
816 static const nfs4_verifier zeroverf;
817
818 /* no need to check permission - this will be done in nfsd_readdir() */
819
820 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
821 return nfserr_inval;
822
916d2d84
BF		 823 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
824 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
825 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 826
832023bf 827 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 828 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
829 return nfserr_bad_cookie;
830
831 readdir->rd_rqstp = rqstp;
ca364317 832 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 833 return nfs_ok;
834}
835
7191155b 836static __be32
ca364317 837nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 838 union nfsd4_op_u *u)
1da177e4 839{
eb69853d
CH		 840 u->readlink.rl_rqstp = rqstp;
841 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 842 return nfs_ok;
843}
844
7191155b 845static __be32
ca364317 846nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 847 union nfsd4_op_u *u)
1da177e4 848{
eb69853d 849 struct nfsd4_remove *remove = &u->remove;
b37ad28b 850 __be32 status;
1da177e4 851
c87fb4a3 852 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 853 return nfserr_grace;
ca364317
BF		 854 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
855 remove->rm_name, remove->rm_namelen);
1da177e4 856 if (!status) {
ca364317
BF		 857 fh_unlock(&cstate->current_fh);
858 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 859 }
860 return status;
861}
862
7191155b 863static __be32
ca364317 864nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 865 union nfsd4_op_u *u)
1da177e4 866{
eb69853d 867 struct nfsd4_rename *rename = &u->rename;
95424460 868 __be32 status;
1da177e4 869
f8f71d00 870 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 871 return nfserr_grace;
ca364317
BF		 872 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
873 rename->rn_snamelen, &cstate->current_fh,
1da177e4 874 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 875 if (status)
876 return status;
877 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
878 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
879 return nfs_ok;
1da177e4
LT		 880}
881
dcb488a3
AA		 882static __be32
883nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 884 union nfsd4_op_u *u)
dcb488a3 885{
eb69853d 886 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 887 struct svc_export *exp;
888 struct dentry *dentry;
889 __be32 err;
890
29a78a3e
BF		 891 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
892 if (err)
893 return err;
dcb488a3
AA		 894 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
895 secinfo->si_name, secinfo->si_namelen,
896 &exp, &dentry);
897 if (err)
898 return err;
2f6fc056 899 fh_unlock(&cstate->current_fh);
2b0143b5 900 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 901 exp_put(exp);
902 err = nfserr_noent;
903 } else
904 secinfo->si_exp = exp;
905 dput(dentry);
56560b9a
BF		 906 if (cstate->minorversion)
907 /* See rfc 5661 section 2.6.3.1.1.8 */
908 fh_put(&cstate->current_fh);
dcb488a3
AA		 909 return err;
910}
911
04f4ad16
BF		 912static __be32
913nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 914 union nfsd4_op_u *u)
04f4ad16
BF		 915{
916 __be32 err;
917
eb69853d 918 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 919 case NFS4_SECINFO_STYLE4_CURRENT_FH:
920 break;
921 case NFS4_SECINFO_STYLE4_PARENT:
922 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
923 if (err)
924 return err;
925 break;
926 default:
927 return nfserr_inval;
928 }
bf18f163 929
eb69853d 930 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 931 fh_put(&cstate->current_fh);
932 return nfs_ok;
933}
934
34b1744c
BF		 935static void
936nfsd4_secinfo_release(union nfsd4_op_u *u)
937{
938 if (u->secinfo.si_exp)
939 exp_put(u->secinfo.si_exp);
940}
941
ec572b9e
EG		 942static void
943nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
944{
945 if (u->secinfo_no_name.sin_exp)
946 exp_put(u->secinfo_no_name.sin_exp);
947}
948
7191155b 949static __be32
ca364317 950nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 951 union nfsd4_op_u *u)
1da177e4 952{
eb69853d 953 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 954 __be32 status = nfs_ok;
96f6f985 955 int err;
1da177e4 956
1da177e4 957 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 958 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed 959 &cstate->current_fh, &setattr->sa_stateid,
624322f1 960 WR_STATE, NULL, NULL);
375c5547 961 if (status) {
3e3b4800 962 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 963 return status;
964 }
1da177e4 965 }
96f6f985
AV		 966 err = fh_want_write(&cstate->current_fh);
967 if (err)
968 return nfserrno(err);
1da177e4 969 status = nfs_ok;
3c8e0316
YZ		 970
971 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
972 nfsd_attrmask);
973 if (status)
974 goto out;
975
1da177e4 976 if (setattr->sa_acl != NULL)
ca364317
BF		 977 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
978 setattr->sa_acl);
1da177e4 979 if (status)
18f335af 980 goto out;
18032ca0
DQ		 981 if (setattr->sa_label.len)
982 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
983 &setattr->sa_label);
984 if (status)
985 goto out;
ca364317 986 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
2a1aa489 987 0, (time64_t)0);
18f335af 988out:
bad0dcff 989 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 990 return status;
991}
992
7191155b 993static __be32
ca364317 994nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 995 union nfsd4_op_u *u)
1da177e4 996{
eb69853d 997 struct nfsd4_write *write = &u->write;
1da177e4 998 stateid_t *stateid = &write->wr_stateid;
5c4583b2 999 struct nfsd_file *nf = NULL;
b37ad28b 1000 __be32 status = nfs_ok;
31dec253 1001 unsigned long cnt;
ffe1137b 1002 int nvecs;
1da177e4 1003
1da177e4
LT		 1004 if (write->wr_offset >= OFFSET_MAX)
1005 return nfserr_inval;
1006
d890be15
CL		 1007 cnt = write->wr_buflen;
1008 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1009 write->wr_offset, cnt);
aa0d6aed 1010 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1011 stateid, WR_STATE, &nf, NULL);
375c5547
BF		 1012 if (status) {
1013 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1014 return status;
1015 }
1016
1da177e4 1017 write->wr_how_written = write->wr_stable_how;
b9c0ef85 1018 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp));
1da177e4 1019
3fd9557a
CL		 1020 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1021 &write->wr_head, write->wr_buflen);
ffe1137b
BF		 1022 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1023
5c4583b2 1024 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf->nf_file,
af90f707 1025 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
54bbb7d2 1026 write->wr_how_written);
5c4583b2 1027 nfsd_file_put(nf);
1da177e4 1028
31dec253 1029 write->wr_bytes_written = cnt;
d890be15
CL		 1030 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1031 write->wr_offset, cnt);
1da177e4 1032 return status;
1da177e4
LT		 1033}
1034
ffa0160a 1035static __be32
29ae7f9d 1036nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5c4583b2
JL		 1037 stateid_t *src_stateid, struct nfsd_file **src,
1038 stateid_t *dst_stateid, struct nfsd_file **dst)
ffa0160a 1039{
ffa0160a
CH		 1040 __be32 status;
1041
01310bb7
SM		 1042 if (!cstate->save_fh.fh_dentry)
1043 return nfserr_nofilehandle;
1044
ffa0160a 1045 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
624322f1 1046 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1047 if (status) {
1048 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1049 goto out;
1050 }
1051
1052 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1053 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1054 if (status) {
1055 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1056 goto out_put_src;
1057 }
1058
1059 /* fix up for NFS-specific error code */
5c4583b2
JL		 1060 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1061 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
ffa0160a
CH		 1062 status = nfserr_wrong_type;
1063 goto out_put_dst;
1064 }
1065
29ae7f9d
AS		 1066out:
1067 return status;
1068out_put_dst:
5c4583b2 1069 nfsd_file_put(*dst);
29ae7f9d 1070out_put_src:
5c4583b2 1071 nfsd_file_put(*src);
29ae7f9d
AS		 1072 goto out;
1073}
1074
1075static __be32
1076nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1077 union nfsd4_op_u *u)
29ae7f9d 1078{
eb69853d 1079 struct nfsd4_clone *clone = &u->clone;
5c4583b2 1080 struct nfsd_file *src, *dst;
29ae7f9d
AS		 1081 __be32 status;
1082
1083 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1084 &clone->cl_dst_stateid, &dst);
1085 if (status)
1086 goto out;
1087
5c4583b2 1088 status = nfsd4_clone_file_range(src->nf_file, clone->cl_src_pos,
a25e3726
TM		 1089 dst->nf_file, clone->cl_dst_pos, clone->cl_count,
1090 EX_ISSYNC(cstate->current_fh.fh_export));
ffa0160a 1091
5c4583b2
JL		 1092 nfsd_file_put(dst);
1093 nfsd_file_put(src);
ffa0160a
CH		 1094out:
1095 return status;
1096}
1097
e0639dc5
OK		 1098void nfs4_put_copy(struct nfsd4_copy *copy)
1099{
1100 if (!refcount_dec_and_test(&copy->refcount))
1101 return;
1102 kfree(copy);
1103}
1104
1105static bool
1106check_and_set_stop_copy(struct nfsd4_copy *copy)
1107{
1108 bool value;
1109
1110 spin_lock(&copy->cp_clp->async_lock);
1111 value = copy->stopped;
1112 if (!copy->stopped)
1113 copy->stopped = true;
1114 spin_unlock(&copy->cp_clp->async_lock);
1115 return value;
1116}
1117
1118static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1119{
1120 /* only 1 thread should stop the copy */
1121 if (!check_and_set_stop_copy(copy))
1122 kthread_stop(copy->copy_task);
1123 nfs4_put_copy(copy);
1124}
1125
1126static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1127{
1128 struct nfsd4_copy *copy = NULL;
1129
1130 spin_lock(&clp->async_lock);
1131 if (!list_empty(&clp->async_copies)) {
1132 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1133 copies);
1134 refcount_inc(&copy->refcount);
1135 }
1136 spin_unlock(&clp->async_lock);
1137 return copy;
1138}
1139
1140void nfsd4_shutdown_copy(struct nfs4_client *clp)
1141{
1142 struct nfsd4_copy *copy;
1143
1144 while ((copy = nfsd4_get_copy(clp)) != NULL)
1145 nfsd4_stop_copy(copy);
1146}
ce0887ac
OK		 1147#ifdef CONFIG_NFSD_V4_2_INTER_SSC
1148
1149extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1150 struct nfs_fh *src_fh,
1151 nfs4_stateid *stateid);
1152extern void nfs42_ssc_close(struct file *filep);
1153
1154extern void nfs_sb_deactive(struct super_block *sb);
1155
1156#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1157
1158/**
1159 * Support one copy source server for now.
1160 */
1161static __be32
1162nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1163 struct vfsmount **mount)
1164{
1165 struct file_system_type *type;
1166 struct vfsmount *ss_mnt;
1167 struct nfs42_netaddr *naddr;
1168 struct sockaddr_storage tmp_addr;
1169 size_t tmp_addrlen, match_netid_len = 3;
1170 char *startsep = "", *endsep = "", *match_netid = "tcp";
1171 char *ipaddr, *dev_name, *raw_data;
b8290ca2
OK		 1172 int len, raw_len;
1173 __be32 status = nfserr_inval;
ce0887ac
OK		 1174
1175 naddr = &nss->u.nl4_addr;
1176 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1177 naddr->addr_len,
1178 (struct sockaddr *)&tmp_addr,
1179 sizeof(tmp_addr));
1180 if (tmp_addrlen == 0)
1181 goto out_err;
1182
1183 if (tmp_addr.ss_family == AF_INET6) {
1184 startsep = "[";
1185 endsep = "]";
1186 match_netid = "tcp6";
1187 match_netid_len = 4;
1188 }
1189
1190 if (naddr->netid_len != match_netid_len ||
1191 strncmp(naddr->netid, match_netid, naddr->netid_len))
1192 goto out_err;
1193
1194 /* Construct the raw data for the vfs_kern_mount call */
1195 len = RPC_MAX_ADDRBUFLEN + 1;
1196 ipaddr = kzalloc(len, GFP_KERNEL);
1197 if (!ipaddr)
1198 goto out_err;
1199
1200 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1201
1202 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1203
1204 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1205 raw_data = kzalloc(raw_len, GFP_KERNEL);
1206 if (!raw_data)
1207 goto out_free_ipaddr;
1208
1209 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1210
b8290ca2 1211 status = nfserr_nodev;
ce0887ac
OK		 1212 type = get_fs_type("nfs");
1213 if (!type)
1214 goto out_free_rawdata;
1215
1216 /* Set the server:<export> for the vfs_kern_mount call */
1217 dev_name = kzalloc(len + 5, GFP_KERNEL);
1218 if (!dev_name)
1219 goto out_free_rawdata;
1220 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1221
1222 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1223 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1224 module_put(type->owner);
1225 if (IS_ERR(ss_mnt))
1226 goto out_free_devname;
1227
1228 status = 0;
1229 *mount = ss_mnt;
1230
1231out_free_devname:
1232 kfree(dev_name);
1233out_free_rawdata:
1234 kfree(raw_data);
1235out_free_ipaddr:
1236 kfree(ipaddr);
1237out_err:
1238 return status;
1239}
1240
1241static void
1242nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1243{
1244 nfs_sb_deactive(ss_mnt->mnt_sb);
1245 mntput(ss_mnt);
1246}
1247
1248/**
1249 * nfsd4_setup_inter_ssc
1250 *
1251 * Verify COPY destination stateid.
1252 * Connect to the source server with NFSv4.1.
1253 * Create the source struct file for nfsd_copy_range.
1254 * Called with COPY cstate:
1255 * SAVED_FH: source filehandle
1256 * CURRENT_FH: destination filehandle
ce0887ac
OK		 1257 */
1258static __be32
1259nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1260 struct nfsd4_compound_state *cstate,
1261 struct nfsd4_copy *copy, struct vfsmount **mount)
1262{
1263 struct svc_fh *s_fh = NULL;
1264 stateid_t *s_stid = &copy->cp_src_stateid;
b8290ca2 1265 __be32 status = nfserr_inval;
ce0887ac
OK		 1266
1267 /* Verify the destination stateid and set dst struct file*/
1268 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1269 &copy->cp_dst_stateid,
1270 WR_STATE, &copy->nf_dst, NULL);
1271 if (status)
1272 goto out;
1273
1274 status = nfsd4_interssc_connect(&copy->cp_src, rqstp, mount);
1275 if (status)
1276 goto out;
1277
1278 s_fh = &cstate->save_fh;
1279
1280 copy->c_fh.size = s_fh->fh_handle.fh_size;
1281 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
3f9544ca 1282 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
ce0887ac
OK		 1283 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1284 sizeof(stateid_opaque_t));
1285
1286 status = 0;
1287out:
1288 return status;
1289}
1290
1291static void
1292nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1293 struct nfsd_file *dst)
1294{
1295 nfs42_ssc_close(src->nf_file);
1296 nfsd_file_put(src);
1297 nfsd_file_put(dst);
1298 mntput(ss_mnt);
1299}
1300
1301#else /* CONFIG_NFSD_V4_2_INTER_SSC */
1302
1303static __be32
1304nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1305 struct nfsd4_compound_state *cstate,
1306 struct nfsd4_copy *copy,
1307 struct vfsmount **mount)
1308{
1309 *mount = NULL;
b8290ca2 1310 return nfserr_inval;
ce0887ac
OK		 1311}
1312
1313static void
1314nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1315 struct nfsd_file *dst)
1316{
1317}
1318
1319static void
1320nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1321{
1322}
1323
1324static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1325 struct nfs_fh *src_fh,
1326 nfs4_stateid *stateid)
1327{
1328 return NULL;
1329}
1330#endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1331
1332static __be32
1333nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1334 struct nfsd4_compound_state *cstate,
1335 struct nfsd4_copy *copy)
1336{
1337 return nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
1338 &copy->nf_src, &copy->cp_dst_stateid,
1339 &copy->nf_dst);
1340}
1341
1342static void
1343nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1344{
1345 nfsd_file_put(src);
1346 nfsd_file_put(dst);
1347}
e0639dc5
OK		 1348
1349static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1350{
1351 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1352
1353 nfs4_put_copy(copy);
1354}
1355
1356static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1357 struct rpc_task *task)
1358{
1359 return 1;
1360}
1361
1362static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1363 .release = nfsd4_cb_offload_release,
1364 .done = nfsd4_cb_offload_done
1365};
1366
1367static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1368{
1369 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1370 copy->cp_synchronous = sync;
1371 gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
1372}
1373
1374static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1375{
1376 ssize_t bytes_copied = 0;
1377 size_t bytes_total = copy->cp_count;
1378 u64 src_pos = copy->cp_src_pos;
1379 u64 dst_pos = copy->cp_dst_pos;
1380
1381 do {
1382 if (kthread_should_stop())
1383 break;
5c4583b2
JL		 1384 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1385 src_pos, copy->nf_dst->nf_file, dst_pos,
1386 bytes_total);
e0639dc5
OK		 1387 if (bytes_copied <= 0)
1388 break;
1389 bytes_total -= bytes_copied;
1390 copy->cp_res.wr_bytes_written += bytes_copied;
1391 src_pos += bytes_copied;
1392 dst_pos += bytes_copied;
1393 } while (bytes_total > 0 && !copy->cp_synchronous);
1394 return bytes_copied;
1395}
1396
1397static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1398{
1399 __be32 status;
1400 ssize_t bytes;
1401
1402 bytes = _nfsd_copy_file_range(copy);
1403 /* for async copy, we ignore the error, client can always retry
1404 * to get the error
1405 */
1406 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1407 status = nfserrno(bytes);
1408 else {
1409 nfsd4_init_copy_res(copy, sync);
1410 status = nfs_ok;
1411 }
1412
ce0887ac
OK		 1413 if (!copy->cp_intra) /* Inter server SSC */
1414 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1415 copy->nf_dst);
1416 else
1417 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1418
e0639dc5
OK		 1419 return status;
1420}
1421
ce0887ac 1422static int dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
e0639dc5
OK		 1423{
1424 dst->cp_src_pos = src->cp_src_pos;
1425 dst->cp_dst_pos = src->cp_dst_pos;
1426 dst->cp_count = src->cp_count;
1427 dst->cp_synchronous = src->cp_synchronous;
1428 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1429 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1430 dst->cp_clp = src->cp_clp;
5c4583b2 1431 dst->nf_dst = nfsd_file_get(src->nf_dst);
ce0887ac
OK		 1432 dst->cp_intra = src->cp_intra;
1433 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1434 dst->nf_src = nfsd_file_get(src->nf_src);
1435
e0639dc5 1436 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
ce0887ac
OK		 1437 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1438 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1439 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1440 dst->ss_mnt = src->ss_mnt;
1441
1442 return 0;
e0639dc5
OK		 1443}
1444
1445static void cleanup_async_copy(struct nfsd4_copy *copy)
1446{
624322f1 1447 nfs4_free_copy_state(copy);
5c4583b2 1448 nfsd_file_put(copy->nf_dst);
2e577f0f
OK		 1449 if (copy->cp_intra)
1450 nfsd_file_put(copy->nf_src);
e0639dc5
OK		 1451 spin_lock(&copy->cp_clp->async_lock);
1452 list_del(&copy->copies);
1453 spin_unlock(&copy->cp_clp->async_lock);
1454 nfs4_put_copy(copy);
1455}
1456
1457static int nfsd4_do_async_copy(void *data)
1458{
1459 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1460 struct nfsd4_copy *cb_copy;
1461
ce0887ac
OK		 1462 if (!copy->cp_intra) { /* Inter server SSC */
1463 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1464 if (!copy->nf_src) {
1465 copy->nfserr = nfserr_serverfault;
1466 nfsd4_interssc_disconnect(copy->ss_mnt);
1467 goto do_callback;
1468 }
1469 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, &copy->c_fh,
1470 &copy->stateid);
1471 if (IS_ERR(copy->nf_src->nf_file)) {
1472 kfree(copy->nf_src);
1473 copy->nfserr = nfserr_offload_denied;
1474 nfsd4_interssc_disconnect(copy->ss_mnt);
1475 goto do_callback;
1476 }
1477 }
1478
e0639dc5 1479 copy->nfserr = nfsd4_do_copy(copy, 0);
ce0887ac 1480do_callback:
e0639dc5
OK		 1481 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1482 if (!cb_copy)
1483 goto out;
1484 memcpy(&cb_copy->cp_res, &copy->cp_res, sizeof(copy->cp_res));
1485 cb_copy->cp_clp = copy->cp_clp;
1486 cb_copy->nfserr = copy->nfserr;
1487 memcpy(&cb_copy->fh, &copy->fh, sizeof(copy->fh));
1488 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1489 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1490 nfsd4_run_cb(&cb_copy->cp_cb);
1491out:
ce0887ac
OK		 1492 if (!copy->cp_intra)
1493 kfree(copy->nf_src);
e0639dc5
OK		 1494 cleanup_async_copy(copy);
1495 return 0;
1496}
1497
29ae7f9d
AS		 1498static __be32
1499nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1500 union nfsd4_op_u *u)
29ae7f9d 1501{
eb69853d 1502 struct nfsd4_copy *copy = &u->copy;
29ae7f9d 1503 __be32 status;
e0639dc5 1504 struct nfsd4_copy *async_copy = NULL;
29ae7f9d 1505
ce0887ac
OK		 1506 if (!copy->cp_intra) { /* Inter server SSC */
1507 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1508 status = nfserr_notsupp;
1509 goto out;
1510 }
1511 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1512 &copy->ss_mnt);
1513 if (status)
1514 return nfserr_offload_denied;
1515 } else {
1516 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1517 if (status)
1518 return status;
1519 }
29ae7f9d 1520
e0639dc5
OK		 1521 copy->cp_clp = cstate->clp;
1522 memcpy(&copy->fh, &cstate->current_fh.fh_handle,
1523 sizeof(struct knfsd_fh));
1524 if (!copy->cp_synchronous) {
1525 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
29ae7f9d 1526
e0639dc5
OK		 1527 status = nfserrno(-ENOMEM);
1528 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1529 if (!async_copy)
ce0887ac
OK		 1530 goto out_err;
1531 if (!nfs4_init_copy_state(nn, copy))
1532 goto out_err;
e0639dc5
OK		 1533 refcount_set(&async_copy->refcount, 1);
1534 memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid,
1535 sizeof(copy->cp_stateid));
ce0887ac
OK		 1536 status = dup_copy_fields(copy, async_copy);
1537 if (status)
1538 goto out_err;
e0639dc5
OK		 1539 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1540 async_copy, "%s", "copy thread");
1541 if (IS_ERR(async_copy->copy_task))
1542 goto out_err;
1543 spin_lock(&async_copy->cp_clp->async_lock);
1544 list_add(&async_copy->copies,
1545 &async_copy->cp_clp->async_copies);
1546 spin_unlock(&async_copy->cp_clp->async_lock);
1547 wake_up_process(async_copy->copy_task);
29ae7f9d 1548 status = nfs_ok;
ce0887ac 1549 } else {
e0639dc5 1550 status = nfsd4_do_copy(copy, 1);
ce0887ac 1551 }
29ae7f9d
AS		 1552out:
1553 return status;
e0639dc5 1554out_err:
18f428d4
OK		 1555 if (async_copy)
1556 cleanup_async_copy(async_copy);
ce0887ac
OK		 1557 status = nfserrno(-ENOMEM);
1558 if (!copy->cp_intra)
1559 nfsd4_interssc_disconnect(copy->ss_mnt);
e0639dc5
OK		 1560 goto out;
1561}
1562
1563struct nfsd4_copy *
1564find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1565{
1566 struct nfsd4_copy *copy;
1567
1568 spin_lock(&clp->async_lock);
1569 list_for_each_entry(copy, &clp->async_copies, copies) {
ce0887ac 1570 if (memcmp(&copy->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
e0639dc5
OK		 1571 continue;
1572 refcount_inc(&copy->refcount);
1573 spin_unlock(&clp->async_lock);
1574 return copy;
1575 }
1576 spin_unlock(&clp->async_lock);
1577 return NULL;
29ae7f9d
AS		 1578}
1579
885e2bf3
OK		 1580static __be32
1581nfsd4_offload_cancel(struct svc_rqst *rqstp,
1582 struct nfsd4_compound_state *cstate,
1583 union nfsd4_op_u *u)
1584{
e0639dc5 1585 struct nfsd4_offload_status *os = &u->offload_status;
e0639dc5
OK		 1586 struct nfsd4_copy *copy;
1587 struct nfs4_client *clp = cstate->clp;
1588
1589 copy = find_async_copy(clp, &os->stateid);
ce0887ac
OK		 1590 if (!copy) {
1591 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1592
1593 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1594 } else
e0639dc5 1595 nfsd4_stop_copy(copy);
e0639dc5 1596
ce0887ac 1597 return nfs_ok;
885e2bf3
OK		 1598}
1599
51911868
OK		 1600static __be32
1601nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1602 union nfsd4_op_u *u)
1603{
624322f1
OK		 1604 struct nfsd4_copy_notify *cn = &u->copy_notify;
1605 __be32 status;
1606 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1607 struct nfs4_stid *stid;
1608 struct nfs4_cpntf_state *cps;
1609 struct nfs4_client *clp = cstate->clp;
1610
1611 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1612 &cn->cpn_src_stateid, RD_STATE, NULL,
1613 &stid);
1614 if (status)
1615 return status;
1616
1617 cn->cpn_sec = nn->nfsd4_lease;
1618 cn->cpn_nsec = 0;
1619
1620 status = nfserrno(-ENOMEM);
1621 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1622 if (!cps)
1623 goto out;
1624 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1625 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1626 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1627
1628 /* For now, only return one server address in cpn_src, the
1629 * address used by the client to connect to this server.
1630 */
1631 cn->cpn_src.nl4_type = NL4_NETADDR;
1632 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1633 &cn->cpn_src.u.nl4_addr);
1634 WARN_ON_ONCE(status);
1635 if (status) {
1636 nfs4_put_cpntf_state(nn, cps);
1637 goto out;
1638 }
1639out:
1640 nfs4_put_stid(stid);
1641 return status;
51911868
OK		 1642}
1643
95d871f0
AS		 1644static __be32
1645nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1646 struct nfsd4_fallocate *fallocate, int flags)
1647{
0d4d6720 1648 __be32 status;
5c4583b2 1649 struct nfsd_file *nf;
95d871f0 1650
aa0d6aed 1651 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1652 &fallocate->falloc_stateid,
624322f1 1653 WR_STATE, &nf, NULL);
95d871f0
AS		 1654 if (status != nfs_ok) {
1655 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1656 return status;
1657 }
1658
5c4583b2 1659 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
95d871f0
AS		 1660 fallocate->falloc_offset,
1661 fallocate->falloc_length,
1662 flags);
5c4583b2 1663 nfsd_file_put(nf);
95d871f0
AS		 1664 return status;
1665}
6308bc98
OK		 1666static __be32
1667nfsd4_offload_status(struct svc_rqst *rqstp,
1668 struct nfsd4_compound_state *cstate,
1669 union nfsd4_op_u *u)
1670{
e0639dc5
OK		 1671 struct nfsd4_offload_status *os = &u->offload_status;
1672 __be32 status = 0;
1673 struct nfsd4_copy *copy;
1674 struct nfs4_client *clp = cstate->clp;
1675
1676 copy = find_async_copy(clp, &os->stateid);
1677 if (copy) {
1678 os->count = copy->cp_res.wr_bytes_written;
1679 nfs4_put_copy(copy);
1680 } else
1681 status = nfserr_bad_stateid;
1682
1683 return status;
6308bc98 1684}
95d871f0
AS		 1685
1686static __be32
1687nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1688 union nfsd4_op_u *u)
95d871f0 1689{
eb69853d 1690 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1691}
1692
b0cb9085
AS		 1693static __be32
1694nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1695 union nfsd4_op_u *u)
b0cb9085 1696{
eb69853d 1697 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1698 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1699}
1700
24bab491
AS		 1701static __be32
1702nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1703 union nfsd4_op_u *u)
24bab491 1704{
eb69853d 1705 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1706 int whence;
1707 __be32 status;
5c4583b2 1708 struct nfsd_file *nf;
24bab491 1709
aa0d6aed 1710 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1711 &seek->seek_stateid,
624322f1 1712 RD_STATE, &nf, NULL);
24bab491
AS		 1713 if (status) {
1714 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1715 return status;
1716 }
1717
1718 switch (seek->seek_whence) {
1719 case NFS4_CONTENT_DATA:
1720 whence = SEEK_DATA;
1721 break;
1722 case NFS4_CONTENT_HOLE:
1723 whence = SEEK_HOLE;
1724 break;
1725 default:
1726 status = nfserr_union_notsupp;
1727 goto out;
1728 }
1729
1730 /*
1731 * Note: This call does change file->f_pos, but nothing in NFSD
1732 * should ever file->f_pos.
1733 */
5c4583b2 1734 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
24bab491
AS		 1735 if (seek->seek_pos < 0)
1736 status = nfserrno(seek->seek_pos);
5c4583b2 1737 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
24bab491
AS		 1738 seek->seek_eof = true;
1739
1740out:
5c4583b2 1741 nfsd_file_put(nf);
24bab491
AS		 1742 return status;
1743}
1744
1da177e4
LT		 1745/* This routine never returns NFS_OK! If there are no other errors, it
1746 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1747 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1748 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1749 */
b37ad28b 1750static __be32
c954e2a5 1751_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1752 struct nfsd4_verify *verify)
1da177e4 1753{
2ebbc012 1754 __be32 *buf, *p;
1da177e4 1755 int count;
b37ad28b 1756 __be32 status;
1da177e4 1757
8837abca 1758 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1759 if (status)
1760 return status;
1761
3c8e0316
YZ		 1762 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1763 if (status)
1764 return status;
1765
1da177e4
LT		 1766 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1767 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1768 return nfserr_inval;
1769 if (verify->ve_attrlen & 3)
1770 return nfserr_inval;
1771
1772 /* count in words:
1773 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1774 */
1775 count = 4 + (verify->ve_attrlen >> 2);
1776 buf = kmalloc(count << 2, GFP_KERNEL);
1777 if (!buf)
3e772463 1778 return nfserr_jukebox;
1da177e4 1779
84822d0b 1780 p = buf;
d5184658 1781 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1782 cstate->current_fh.fh_export,
d5184658
BF		 1783 cstate->current_fh.fh_dentry,
1784 verify->ve_bmval,
406a7ea9 1785 rqstp, 0);
41ae6e71
BF		 1786 /*
1787 * If nfsd4_encode_fattr() ran out of space, assume that's because
1788 * the attributes are longer (hence different) than those given:
1789 */
84822d0b 1790 if (status == nfserr_resource)
1da177e4
LT		 1791 status = nfserr_not_same;
1792 if (status)
1793 goto out_kfree;
1794
95ec28cd
BH		 1795 /* skip bitmap */
1796 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1797 status = nfserr_not_same;
1798 if (ntohl(*p++) != verify->ve_attrlen)
1799 goto out_kfree;
1800 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1801 status = nfserr_same;
1802
1803out_kfree:
1804 kfree(buf);
1805 return status;
1806}
1807
c954e2a5
BF		 1808static __be32
1809nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1810 union nfsd4_op_u *u)
c954e2a5
BF		 1811{
1812 __be32 status;
1813
eb69853d 1814 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1815 return status == nfserr_not_same ? nfs_ok : status;
1816}
1817
1818static __be32
1819nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1820 union nfsd4_op_u *u)
c954e2a5
BF		 1821{
1822 __be32 status;
1823
eb69853d 1824 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1825 return status == nfserr_same ? nfs_ok : status;
1826}
1827
9cf514cc
CH		 1828#ifdef CONFIG_NFSD_PNFS
1829static const struct nfsd4_layout_ops *
1830nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1831{
8a4c3926 1832 if (!exp->ex_layout_types) {
9cf514cc
CH		 1833 dprintk("%s: export does not support pNFS\n", __func__);
1834 return NULL;
1835 }
1836
b550a32e
AK		 1837 if (layout_type >= LAYOUT_TYPE_MAX ||
1838 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1839 dprintk("%s: layout type %d not supported\n",
1840 __func__, layout_type);
1841 return NULL;
1842 }
1843
1844 return nfsd4_layout_ops[layout_type];
1845}
1846
1847static __be32
1848nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1849 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1850{
eb69853d 1851 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1852 const struct nfsd4_layout_ops *ops;
1853 struct nfsd4_deviceid_map *map;
1854 struct svc_export *exp;
1855 __be32 nfserr;
1856
1857 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1858 __func__,
1859 gdp->gd_layout_type,
1860 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1861 gdp->gd_maxcount);
1862
1863 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1864 if (!map) {
1865 dprintk("%s: couldn't find device ID to export mapping!\n",
1866 __func__);
1867 return nfserr_noent;
1868 }
1869
1870 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1871 if (IS_ERR(exp)) {
1872 dprintk("%s: could not find device id\n", __func__);
1873 return nfserr_noent;
1874 }
1875
1876 nfserr = nfserr_layoutunavailable;
1877 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1878 if (!ops)
1879 goto out;
1880
1881 nfserr = nfs_ok;
f99d4fbd
CH		 1882 if (gdp->gd_maxcount != 0) {
1883 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1884 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1885 }
9cf514cc
CH		 1886
1887 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1888out:
a1420384 1889 exp_put(exp);
9cf514cc
CH		 1890 return nfserr;
1891}
1892
34b1744c
BF		 1893static void
1894nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1895{
1896 kfree(u->getdeviceinfo.gd_device);
1897}
1898
9cf514cc
CH		 1899static __be32
1900nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1901 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1902{
eb69853d 1903 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1904 struct svc_fh *current_fh = &cstate->current_fh;
1905 const struct nfsd4_layout_ops *ops;
1906 struct nfs4_layout_stateid *ls;
1907 __be32 nfserr;
66282ec1 1908 int accmode = NFSD_MAY_READ_IF_EXEC;
9cf514cc
CH		 1909
1910 switch (lgp->lg_seg.iomode) {
1911 case IOMODE_READ:
66282ec1 1912 accmode |= NFSD_MAY_READ;
9cf514cc
CH		 1913 break;
1914 case IOMODE_RW:
66282ec1 1915 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
9cf514cc
CH		 1916 break;
1917 default:
1918 dprintk("%s: invalid iomode %d\n",
1919 __func__, lgp->lg_seg.iomode);
1920 nfserr = nfserr_badiomode;
1921 goto out;
1922 }
1923
1924 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1925 if (nfserr)
1926 goto out;
1927
1928 nfserr = nfserr_layoutunavailable;
1929 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1930 if (!ops)
1931 goto out;
1932
1933 /*
1934 * Verify minlength and range as per RFC5661:
1935 * o If loga_length is less than loga_minlength,
1936 * the metadata server MUST return NFS4ERR_INVAL.
1937 * o If the sum of loga_offset and loga_minlength exceeds
1938 * NFS4_UINT64_MAX, and loga_minlength is not
1939 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1940 * o If the sum of loga_offset and loga_length exceeds
1941 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1942 * the error NFS4ERR_INVAL MUST result.
1943 */
1944 nfserr = nfserr_inval;
1945 if (lgp->lg_seg.length < lgp->lg_minlength ||
1946 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1947 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1948 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1949 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1950 goto out;
1951 if (lgp->lg_seg.length == 0)
1952 goto out;
1953
1954 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1955 true, lgp->lg_layout_type, &ls);
31ef83dc 1956 if (nfserr) {
f394b62b 1957 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1958 goto out;
31ef83dc 1959 }
9cf514cc 1960
c5c707f9
CH		 1961 nfserr = nfserr_recallconflict;
1962 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1963 goto out_put_stid;
1964
2b0143b5 1965 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1966 current_fh, lgp);
1967 if (nfserr)
1968 goto out_put_stid;
1969
1970 nfserr = nfsd4_insert_layout(lgp, ls);
1971
1972out_put_stid:
cc8a5532 1973 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1974 nfs4_put_stid(&ls->ls_stid);
1975out:
1976 return nfserr;
1977}
1978
34b1744c
BF		 1979static void
1980nfsd4_layoutget_release(union nfsd4_op_u *u)
1981{
1982 kfree(u->layoutget.lg_content);
1983}
1984
9cf514cc
CH		 1985static __be32
1986nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1987 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1988{
eb69853d 1989 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1990 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1991 struct svc_fh *current_fh = &cstate->current_fh;
1992 const struct nfsd4_layout_ops *ops;
1993 loff_t new_size = lcp->lc_last_wr + 1;
1994 struct inode *inode;
1995 struct nfs4_layout_stateid *ls;
1996 __be32 nfserr;
1997
1998 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
1999 if (nfserr)
2000 goto out;
2001
2002 nfserr = nfserr_layoutunavailable;
2003 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2004 if (!ops)
2005 goto out;
2b0143b5 2006 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 2007
2008 nfserr = nfserr_inval;
2009 if (new_size <= seg->offset) {
2010 dprintk("pnfsd: last write before layout segment\n");
2011 goto out;
2012 }
2013 if (new_size > seg->offset + seg->length) {
2014 dprintk("pnfsd: last write beyond layout segment\n");
2015 goto out;
2016 }
2017 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2018 dprintk("pnfsd: layoutcommit beyond EOF\n");
2019 goto out;
2020 }
2021
2022 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2023 false, lcp->lc_layout_type,
2024 &ls);
2025 if (nfserr) {
f394b62b 2026 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 2027 /* fixup error code as per RFC5661 */
2028 if (nfserr == nfserr_bad_stateid)
2029 nfserr = nfserr_badlayout;
2030 goto out;
2031 }
2032
cc8a5532
JL		 2033 /* LAYOUTCOMMIT does not require any serialization */
2034 mutex_unlock(&ls->ls_mutex);
2035
9cf514cc
CH		 2036 if (new_size > i_size_read(inode)) {
2037 lcp->lc_size_chg = 1;
2038 lcp->lc_newsize = new_size;
2039 } else {
2040 lcp->lc_size_chg = 0;
2041 }
2042
d8398fc1 2043 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 2044 nfs4_put_stid(&ls->ls_stid);
2045out:
2046 return nfserr;
2047}
2048
2049static __be32
2050nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 2051 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 2052{
eb69853d 2053 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 2054 struct svc_fh *current_fh = &cstate->current_fh;
2055 __be32 nfserr;
2056
2057 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2058 if (nfserr)
2059 goto out;
2060
2061 nfserr = nfserr_layoutunavailable;
2062 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2063 goto out;
2064
2065 switch (lrp->lr_seg.iomode) {
2066 case IOMODE_READ:
2067 case IOMODE_RW:
2068 case IOMODE_ANY:
2069 break;
2070 default:
2071 dprintk("%s: invalid iomode %d\n", __func__,
2072 lrp->lr_seg.iomode);
2073 nfserr = nfserr_inval;
2074 goto out;
2075 }
2076
2077 switch (lrp->lr_return_type) {
2078 case RETURN_FILE:
2079 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2080 break;
2081 case RETURN_FSID:
2082 case RETURN_ALL:
2083 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2084 break;
2085 default:
2086 dprintk("%s: invalid return_type %d\n", __func__,
2087 lrp->lr_return_type);
2088 nfserr = nfserr_inval;
2089 break;
2090 }
2091out:
2092 return nfserr;
2093}
2094#endif /* CONFIG_NFSD_PNFS */
2095
1da177e4
LT		 2096/*
2097 * NULL call.
2098 */
7111c66e 2099static __be32
a6beb732 2100nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 2101{
2102 return nfs_ok;
2103}
2104
e2b20950
SA		 2105static inline void nfsd4_increment_op_stats(u32 opnum)
2106{
2107 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2108 nfsdstats.nfs4_opcount[opnum]++;
2109}
2110
bb2a8b0c 2111static const struct nfsd4_operation nfsd4_ops[];
b591480b 2112
f1c7f79b 2113static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 2114
f9bb94c4 2115/*
57716355 2116 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 2117 *
57716355
BF		 2118 * Also note, enforced elsewhere:
2119 * - SEQUENCE other than as first op results in
2120 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 2121 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2122 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 2123 * - DESTROY_SESSION must be the final operation in a compound, if
2124 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2125 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 2126 */
57716355 2127static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 2128{
7a04cfda 2129 struct nfsd4_op *first_op = &args->ops[0];
57716355
BF		 2130
2131 /* These ordering requirements don't apply to NFSv4.0: */
2132 if (args->minorversion == 0)
2133 return nfs_ok;
2134 /* This is weird, but OK, not our problem: */
2135 if (args->opcnt == 0)
2136 return nfs_ok;
7a04cfda 2137 if (first_op->status == nfserr_op_illegal)
57716355 2138 return nfs_ok;
7a04cfda 2139 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
57716355 2140 return nfserr_op_not_in_session;
7a04cfda 2141 if (first_op->opnum == OP_SEQUENCE)
57716355 2142 return nfs_ok;
7a04cfda
BF		 2143 /*
2144 * So first_op is something allowed outside a session, like
2145 * EXCHANGE_ID; but then it has to be the only op in the
2146 * compound:
2147 */
57716355
BF		 2148 if (args->opcnt != 1)
2149 return nfserr_not_only_op;
2150 return nfs_ok;
f9bb94c4
AA		 2151}
2152
f4f9ef4a 2153const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 2154{
2155 return &nfsd4_ops[op->opnum];
2156}
2157
1091006c
BF		 2158bool nfsd4_cache_this_op(struct nfsd4_op *op)
2159{
e372ba60
BF		 2160 if (op->opnum == OP_ILLEGAL)
2161 return false;
c856694e 2162 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 2163}
2164
68d93184
BF		 2165static bool need_wrongsec_check(struct svc_rqst *rqstp)
2166{
2167 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2168 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2169 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2170 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 2171 const struct nfsd4_operation *thisd = OPDESC(this);
2172 const struct nfsd4_operation *nextd;
68d93184 2173
68d93184
BF		 2174 /*
2175 * Most ops check wronsec on our own; only the putfh-like ops
2176 * have special rules.
2177 */
2178 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2179 return false;
2180 /*
2181 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2182 * put-filehandle operation if we're not going to use the
2183 * result:
2184 */
2185 if (argp->opcnt == resp->opcnt)
2186 return false;
51904b08
BF		 2187 if (next->opnum == OP_ILLEGAL)
2188 return false;
68d93184
BF		 2189 nextd = OPDESC(next);
2190 /*
2191 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2192 * errors themselves as necessary; others should check for them
2193 * now:
2194 */
2195 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2196}
2197
2d124dfa
BF		 2198static void svcxdr_init_encode(struct svc_rqst *rqstp,
2199 struct nfsd4_compoundres *resp)
2200{
2201 struct xdr_stream *xdr = &resp->xdr;
2202 struct xdr_buf *buf = &rqstp->rq_res;
2203 struct kvec *head = buf->head;
2204
2205 xdr->buf = buf;
ddd1ea56 2206 xdr->iov = head;
2d124dfa 2207 xdr->p = head->iov_base + head->iov_len;
a5cddc88 2208 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 2209 /* Tail and page_len should be zero at this point: */
2210 buf->len = buf->head[0].iov_len;
2825a7f9 2211 xdr->scratch.iov_len = 0;
05638dc7 2212 xdr->page_ptr = buf->pages - 1;
2825a7f9 2213 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 2214 - rqstp->rq_auth_slack;
2d124dfa
BF		 2215}
2216
b9e8638e
OK		 2217#ifdef CONFIG_NFSD_V4_2_INTER_SSC
2218static void
2219check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2220{
2221 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2222 struct nfsd4_copy *copy;
2223 struct nfsd4_putfh *putfh;
2224 int i;
2225
2226 /* traverse all operation and if it's a COPY compound, mark the
2227 * source filehandle to skip verification
2228 */
2229 for (i = 0; i < args->opcnt; i++) {
2230 op = &args->ops[i];
2231 if (op->opnum == OP_PUTFH)
2232 current_op = op;
2233 else if (op->opnum == OP_SAVEFH)
2234 saved_op = current_op;
2235 else if (op->opnum == OP_RESTOREFH)
2236 current_op = saved_op;
2237 else if (op->opnum == OP_COPY) {
2238 copy = (struct nfsd4_copy *)&op->u;
2239 if (!saved_op) {
2240 op->status = nfserr_nofilehandle;
2241 return;
2242 }
2243 putfh = (struct nfsd4_putfh *)&saved_op->u;
2244 if (!copy->cp_intra)
2245 putfh->no_verify = true;
2246 }
2247 }
2248}
2249#else
2250static void
2251check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2252{
2253}
2254#endif
2255
1da177e4
LT		 2256/*
2257 * COMPOUND call.
2258 */
7111c66e 2259static __be32
a6beb732 2260nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 2261{
a6beb732
CH		 2262 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2263 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 2264 struct nfsd4_op *op;
e354d571 2265 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 2266 struct svc_fh *current_fh = &cstate->current_fh;
2267 struct svc_fh *save_fh = &cstate->save_fh;
e333f3bb 2268 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
b37ad28b 2269 __be32 status;
1da177e4 2270
2d124dfa 2271 svcxdr_init_encode(rqstp, resp);
4aea24b2 2272 resp->tagp = resp->xdr.p;
1da177e4 2273 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 2274 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 2275 resp->taglen = args->taglen;
2276 resp->tag = args->tag;
1da177e4 2277 resp->rqstp = rqstp;
4daeed25 2278 cstate->minorversion = args->minorversion;
4daeed25
KM		 2279 fh_init(current_fh, NFS4_FHSIZE);
2280 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 2281 /*
2282 * Don't use the deferral mechanism for NFSv4; compounds make it
2283 * too hard to avoid non-idempotency problems.
2284 */
30660e04 2285 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 2286
2287 /*
2288 * According to RFC3010, this takes precedence over all other errors.
2289 */
2290 status = nfserr_minor_vers_mismatch;
e333f3bb 2291 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
1da177e4 2292 goto out;
0078117c
BF		 2293 status = nfserr_resource;
2294 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2295 goto out;
1da177e4 2296
57716355
BF		 2297 status = nfs41_check_op_ordering(args);
2298 if (status) {
f9bb94c4 2299 op = &args->ops[0];
57716355 2300 op->status = status;
5b7b15ae 2301 resp->opcnt = 1;
f9bb94c4
AA		 2302 goto encode_op;
2303 }
b9e8638e 2304 check_if_stalefh_allowed(args);
f9bb94c4 2305
fff4080b 2306 trace_nfsd_compound(rqstp, args->opcnt);
1da177e4
LT		 2307 while (!status && resp->opcnt < args->opcnt) {
2308 op = &args->ops[resp->opcnt++];
2309
2310 /*
2311 * The XDR decode routines may have pre-set op->status;
2312 * for example, if there is a miscellaneous XDR error
2313 * it will be set to nfserr_bad_xdr.
2314 */
9d313b17
BF		 2315 if (op->status) {
2316 if (op->opnum == OP_OPEN)
2317 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 2318 goto encode_op;
9d313b17 2319 }
b9e8638e
OK		 2320 if (!current_fh->fh_dentry &&
2321 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
f4f9ef4a 2322 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 2323 op->status = nfserr_nofilehandle;
2324 goto encode_op;
2325 }
b9e8638e
OK		 2326 } else if (current_fh->fh_export &&
2327 current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 2328 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 2329 op->status = nfserr_moved;
1da177e4
LT		 2330 goto encode_op;
2331 }
b591480b 2332
2336745e
KM		 2333 fh_clear_wcc(current_fh);
2334
58e7b33a 2335 /* If op is non-idempotent */
f4f9ef4a 2336 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 2337 /*
a8095f7e
BF		 2338 * Don't execute this op if we couldn't encode a
2339 * succesful reply:
2340 */
f4f9ef4a 2341 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 2342 /*
2343 * Plus if there's another operation, make sure
4c69d585
BF		 2344 * we'll have space to at least encode an error:
2345 */
2346 if (resp->opcnt < args->opcnt)
2347 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 2348 op->status = nfsd4_check_resp_size(resp, plen);
2349 }
2350
2351 if (op->status)
2352 goto encode_op;
2353
f4f9ef4a
BF		 2354 if (op->opdesc->op_get_currentstateid)
2355 op->opdesc->op_get_currentstateid(cstate, &op->u);
2356 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 2357
9a307403
BF		 2358 /* Only from SEQUENCE */
2359 if (cstate->status == nfserr_replay_cache) {
2360 dprintk("%s NFS4.1 replay from cache\n", __func__);
2361 status = op->status;
2362 goto out;
2363 }
8b70484c 2364 if (!op->status) {
f4f9ef4a
BF		 2365 if (op->opdesc->op_set_currentstateid)
2366 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 2367
f4f9ef4a 2368 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 2369 clear_current_stateid(cstate);
8b70484c 2370
d781e3df
BF		 2371 if (current_fh->fh_export &&
2372 need_wrongsec_check(rqstp))
4daeed25 2373 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 2374 }
1da177e4 2375encode_op:
a90b061c 2376 if (op->status == nfserr_replay_me) {
a4f1706a 2377 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 2378 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 2379 status = op->status = op->replay->rp_status;
2380 } else {
2381 nfsd4_encode_operation(resp, op);
2382 status = op->status;
2383 }
0407717d 2384
fff4080b
CL		 2385 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2386 nfsd4_op_name(op->opnum));
0407717d 2387
58fb12e6 2388 nfsd4_cstate_clear_replay(cstate);
e2b20950 2389 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 2390 }
2391
4daeed25
KM		 2392 cstate->status = status;
2393 fh_put(current_fh);
2394 fh_put(save_fh);
2395 BUG_ON(cstate->replay_owner);
1da177e4 2396out:
2f425878 2397 /* Reset deferral mechanism for RPC deferrals */
30660e04 2398 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 2399 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 2400 return status;
2401}
2402
58e7b33a
MJ		 2403#define op_encode_hdr_size (2)
2404#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2405#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2406#define op_encode_change_info_maxsz (5)
2407#define nfs4_fattr_bitmap_maxsz (4)
2408
8c7424cf
BF		 2409/* We'll fall back on returning no lockowner if run out of space: */
2410#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 2411#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2412
2413#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2414
2415#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2416#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2417 op_encode_ace_maxsz)
2418
2419#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2420
2421static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2422{
2423 return (op_encode_hdr_size) * sizeof(__be32);
2424}
2425
2426static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2427{
2428 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2429}
2430
2282cd2c
KM		 2431static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2432{
2433 /* ac_supported, ac_resp_access */
2434 return (op_encode_hdr_size + 2)* sizeof(__be32);
2435}
2436
58e7b33a
MJ		 2437static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2438{
2439 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2440}
2441
2442static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2443{
2444 return (op_encode_hdr_size + op_encode_change_info_maxsz
2445 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2446}
2447
b86cef60
BF		 2448/*
2449 * Note since this is an idempotent operation we won't insist on failing
2450 * the op prematurely if the estimate is too large. We may turn off splice
2451 * reads unnecessarily.
2452 */
2453static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2454 struct nfsd4_op *op)
2455{
2456 u32 *bmap = op->u.getattr.ga_bmval;
2457 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2458 u32 ret = 0;
2459
2460 if (bmap0 & FATTR4_WORD0_ACL)
2461 return svc_max_payload(rqstp);
2462 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2463 return svc_max_payload(rqstp);
2464
2465 if (bmap1 & FATTR4_WORD1_OWNER) {
2466 ret += IDMAP_NAMESZ + 4;
2467 bmap1 &= ~FATTR4_WORD1_OWNER;
2468 }
2469 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2470 ret += IDMAP_NAMESZ + 4;
2471 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2472 }
2473 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2474 ret += NFS4_FHSIZE + 4;
2475 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2476 }
2477 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 2478 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 2479 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2480 }
2481 /*
2482 * Largest of remaining attributes are 16 bytes (e.g.,
2483 * supported_attributes)
2484 */
2485 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2486 /* bitmask, length */
2487 ret += 20;
2488 return ret;
2489}
2490
2282cd2c
KM		 2491static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2492{
2493 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2494}
2495
58e7b33a
MJ		 2496static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2497{
2498 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2499 * sizeof(__be32);
2500}
2501
2502static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2503{
2504 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2505 * sizeof(__be32);
2506}
2507
2508static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2509{
2510 return (op_encode_hdr_size + op_encode_stateid_maxsz
2511 + op_encode_change_info_maxsz + 1
2512 + nfs4_fattr_bitmap_maxsz
2513 + op_encode_delegation_maxsz) * sizeof(__be32);
2514}
2515
2516static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2517{
2518 u32 maxcount = 0, rlen = 0;
2519
2520 maxcount = svc_max_payload(rqstp);
3c7aa15d 2521 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 2522
622f560e 2523 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2524}
2525
2526static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2527{
3c7aa15d 2528 u32 maxcount = 0, rlen = 0;
58e7b33a 2529
3c7aa15d
KM		 2530 maxcount = svc_max_payload(rqstp);
2531 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 2532
561f0ed4
BF		 2533 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2534 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2535}
2536
2282cd2c
KM		 2537static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2538{
2539 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2540}
2541
58e7b33a
MJ		 2542static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2543{
2544 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2545 * sizeof(__be32);
2546}
2547
2548static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2549{
2550 return (op_encode_hdr_size + op_encode_change_info_maxsz
2551 + op_encode_change_info_maxsz) * sizeof(__be32);
2552}
2553
ccae70a9
BF		 2554static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2555 struct nfsd4_op *op)
2556{
d1d84c96
BF		 2557 return (op_encode_hdr_size
2558 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 2559}
2560
2282cd2c
KM		 2561static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2562{
2563 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2564 * sizeof(__be32);
2565}
2566
58e7b33a
MJ		 2567static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2568{
2569 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2570}
2571
2282cd2c
KM		 2572static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2573{
2574 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2575 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2576}
2577
58e7b33a
MJ		 2578static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2579{
480efaee
BF		 2580 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2581 sizeof(__be32);
58e7b33a
MJ		 2582}
2583
2584static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2585{
f34e432b 2586 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2587}
2588
2589static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2590{
2591 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2592 1 + 1 + /* eir_flags, spr_how */\
2593 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2594 2 + /*eir_server_owner.so_minor_id */\
2595 /* eir_server_owner.so_major_id<> */\
2596 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2597 /* eir_server_scope<> */\
2598 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2599 1 + /* eir_server_impl_id array length */\
2600 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2601}
2602
2603static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2604{
2605 return (op_encode_hdr_size + \
2606 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2607 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2608}
2609
2610static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2611{
2612 return (op_encode_hdr_size + \
2613 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2614 2 + /* csr_sequence, csr_flags */\
2615 op_encode_channel_attrs_maxsz + \
2616 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2617}
2618
29ae7f9d
AS		 2619static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2620{
2621 return (op_encode_hdr_size +
2622 1 /* wr_callback */ +
2623 op_encode_stateid_maxsz /* wr_callback */ +
2624 2 /* wr_count */ +
2625 1 /* wr_committed */ +
2626 op_encode_verifier_maxsz +
2627 1 /* cr_consecutive */ +
2628 1 /* cr_synchronous */) * sizeof(__be32);
2629}
2630
6308bc98
OK		 2631static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2632 struct nfsd4_op *op)
2633{
2634 return (op_encode_hdr_size +
2635 2 /* osr_count */ +
2636 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2637}
2638
51911868
OK		 2639static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2640 struct nfsd4_op *op)
2641{
2642 return (op_encode_hdr_size +
2643 3 /* cnr_lease_time */ +
2644 1 /* We support one cnr_source_server */ +
2645 1 /* cnr_stateid seq */ +
2646 op_encode_stateid_maxsz /* cnr_stateid */ +
2647 1 /* num cnr_source_server*/ +
2648 1 /* nl4_type */ +
2649 1 /* nl4 size */ +
2650 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2651 * sizeof(__be32);
2652}
2653
9cf514cc 2654#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2655static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2656{
2657 u32 maxcount = 0, rlen = 0;
2658
2659 maxcount = svc_max_payload(rqstp);
2660 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2661
2662 return (op_encode_hdr_size +
2663 1 /* gd_layout_type*/ +
2664 XDR_QUADLEN(rlen) +
2665 2 /* gd_notify_types */) * sizeof(__be32);
2666}
2667
9cf514cc
CH		 2668/*
2669 * At this stage we don't really know what layout driver will handle the request,
2670 * so we need to define an arbitrary upper bound here.
2671 */
2672#define MAX_LAYOUT_SIZE 128
2673static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2674{
2675 return (op_encode_hdr_size +
2676 1 /* logr_return_on_close */ +
2677 op_encode_stateid_maxsz +
2678 1 /* nr of layouts */ +
2679 MAX_LAYOUT_SIZE) * sizeof(__be32);
2680}
2681
2682static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2683{
2684 return (op_encode_hdr_size +
2685 1 /* locr_newsize */ +
2686 2 /* ns_size */) * sizeof(__be32);
2687}
2688
2689static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2690{
2691 return (op_encode_hdr_size +
2692 1 /* lrs_stateid */ +
2693 op_encode_stateid_maxsz) * sizeof(__be32);
2694}
2695#endif /* CONFIG_NFSD_PNFS */
2696
2282cd2c
KM		 2697
2698static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2699{
2700 return (op_encode_hdr_size + 3) * sizeof(__be32);
2701}
2702
bb2a8b0c 2703static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2704 [OP_ACCESS] = {
eb69853d 2705 .op_func = nfsd4_access,
b001a1b6 2706 .op_name = "OP_ACCESS",
1c122638 2707 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2708 },
2709 [OP_CLOSE] = {
eb69853d 2710 .op_func = nfsd4_close,
58e7b33a 2711 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2712 .op_name = "OP_CLOSE",
1c122638 2713 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2714 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2715 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2716 },
2717 [OP_COMMIT] = {
eb69853d 2718 .op_func = nfsd4_commit,
58e7b33a 2719 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2720 .op_name = "OP_COMMIT",
1c122638 2721 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2722 },
2723 [OP_CREATE] = {
eb69853d 2724 .op_func = nfsd4_create,
d1471053 2725 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2726 .op_name = "OP_CREATE",
1c122638 2727 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2728 },
2729 [OP_DELEGRETURN] = {
eb69853d 2730 .op_func = nfsd4_delegreturn,
58e7b33a 2731 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2732 .op_name = "OP_DELEGRETURN",
58e7b33a 2733 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2734 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2735 },
2736 [OP_GETATTR] = {
eb69853d 2737 .op_func = nfsd4_getattr,
eeac294e 2738 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2739 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2740 .op_name = "OP_GETATTR",
b591480b
BF		 2741 },
2742 [OP_GETFH] = {
eb69853d 2743 .op_func = nfsd4_getfh,
b001a1b6 2744 .op_name = "OP_GETFH",
1c122638 2745 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2746 },
2747 [OP_LINK] = {
eb69853d 2748 .op_func = nfsd4_link,
c856694e
BF		 2749 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2750 | OP_CACHEME,
b001a1b6 2751 .op_name = "OP_LINK",
1c122638 2752 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2753 },
2754 [OP_LOCK] = {
eb69853d 2755 .op_func = nfsd4_lock,
b7571e4c
BF		 2756 .op_flags = OP_MODIFIES_SOMETHING |
2757 OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2758 .op_name = "OP_LOCK",
1c122638 2759 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2760 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2761 },
2762 [OP_LOCKT] = {
eb69853d 2763 .op_func = nfsd4_lockt,
b7571e4c 2764 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2765 .op_name = "OP_LOCKT",
1c122638 2766 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2767 },
2768 [OP_LOCKU] = {
eb69853d 2769 .op_func = nfsd4_locku,
58e7b33a 2770 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2771 .op_name = "OP_LOCKU",
1c122638 2772 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2773 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2774 },
2775 [OP_LOOKUP] = {
eb69853d 2776 .op_func = nfsd4_lookup,
d1471053 2777 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2778 .op_name = "OP_LOOKUP",
1c122638 2779 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2780 },
2781 [OP_LOOKUPP] = {
eb69853d 2782 .op_func = nfsd4_lookupp,
d1471053 2783 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2784 .op_name = "OP_LOOKUPP",
1c122638 2785 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2786 },
2787 [OP_NVERIFY] = {
eb69853d 2788 .op_func = nfsd4_nverify,
b001a1b6 2789 .op_name = "OP_NVERIFY",
1c122638 2790 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2791 },
2792 [OP_OPEN] = {
eb69853d 2793 .op_func = nfsd4_open,
58e7b33a 2794 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2795 .op_name = "OP_OPEN",
1c122638 2796 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2797 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2798 },
2799 [OP_OPEN_CONFIRM] = {
eb69853d 2800 .op_func = nfsd4_open_confirm,
58e7b33a 2801 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2802 .op_name = "OP_OPEN_CONFIRM",
1c122638 2803 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2804 },
2805 [OP_OPEN_DOWNGRADE] = {
eb69853d 2806 .op_func = nfsd4_open_downgrade,
58e7b33a 2807 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2808 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2809 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2810 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2811 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2812 },
2813 [OP_PUTFH] = {
eb69853d 2814 .op_func = nfsd4_putfh,
68d93184 2815 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2816 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2817 .op_name = "OP_PUTFH",
1c122638 2818 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2819 },
eeac294e 2820 [OP_PUTPUBFH] = {
eb69853d 2821 .op_func = nfsd4_putrootfh,
68d93184 2822 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2823 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2824 .op_name = "OP_PUTPUBFH",
1c122638 2825 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2826 },
b591480b 2827 [OP_PUTROOTFH] = {
eb69853d 2828 .op_func = nfsd4_putrootfh,
68d93184 2829 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2830 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2831 .op_name = "OP_PUTROOTFH",
1c122638 2832 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2833 },
2834 [OP_READ] = {
eb69853d 2835 .op_func = nfsd4_read,
34b1744c 2836 .op_release = nfsd4_read_release,
b001a1b6 2837 .op_name = "OP_READ",
1c122638 2838 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2839 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2840 },
2841 [OP_READDIR] = {
eb69853d 2842 .op_func = nfsd4_readdir,
b001a1b6 2843 .op_name = "OP_READDIR",
1c122638 2844 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2845 },
2846 [OP_READLINK] = {
eb69853d 2847 .op_func = nfsd4_readlink,
b001a1b6 2848 .op_name = "OP_READLINK",
1c122638 2849 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2850 },
2851 [OP_REMOVE] = {
eb69853d 2852 .op_func = nfsd4_remove,
c856694e 2853 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2854 .op_name = "OP_REMOVE",
1c122638 2855 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2856 },
2857 [OP_RENAME] = {
eb69853d 2858 .op_func = nfsd4_rename,
c856694e 2859 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2860 .op_name = "OP_RENAME",
1c122638 2861 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2862 },
2863 [OP_RENEW] = {
eb69853d 2864 .op_func = nfsd4_renew,
58e7b33a
MJ		 2865 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2866 | OP_MODIFIES_SOMETHING,
b001a1b6 2867 .op_name = "OP_RENEW",
1c122638 2868 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2869
b591480b
BF		 2870 },
2871 [OP_RESTOREFH] = {
eb69853d 2872 .op_func = nfsd4_restorefh,
68d93184 2873 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2874 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2875 .op_name = "OP_RESTOREFH",
1c122638 2876 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2877 },
2878 [OP_SAVEFH] = {
eb69853d 2879 .op_func = nfsd4_savefh,
58e7b33a 2880 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2881 .op_name = "OP_SAVEFH",
1c122638 2882 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2883 },
dcb488a3 2884 [OP_SECINFO] = {
eb69853d 2885 .op_func = nfsd4_secinfo,
34b1744c 2886 .op_release = nfsd4_secinfo_release,
68d93184 2887 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2888 .op_name = "OP_SECINFO",
1c122638 2889 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2890 },
b591480b 2891 [OP_SETATTR] = {
eb69853d 2892 .op_func = nfsd4_setattr,
b001a1b6 2893 .op_name = "OP_SETATTR",
b7571e4c
BF		 2894 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2895 | OP_NONTRIVIAL_ERROR_ENCODE,
1c122638 2896 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 2897 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 2898 },
2899 [OP_SETCLIENTID] = {
eb69853d 2900 .op_func = nfsd4_setclientid,
58e7b33a 2901 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
b7571e4c
BF		 2902 | OP_MODIFIES_SOMETHING | OP_CACHEME
2903 | OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2904 .op_name = "OP_SETCLIENTID",
1c122638 2905 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 2906 },
2907 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 2908 .op_func = nfsd4_setclientid_confirm,
58e7b33a 2909 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 2910 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2911 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 2912 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2913 },
2914 [OP_VERIFY] = {
eb69853d 2915 .op_func = nfsd4_verify,
b001a1b6 2916 .op_name = "OP_VERIFY",
1c122638 2917 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2918 },
2919 [OP_WRITE] = {
eb69853d 2920 .op_func = nfsd4_write,
c856694e 2921 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2922 .op_name = "OP_WRITE",
1c122638 2923 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 2924 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 2925 },
2926 [OP_RELEASE_LOCKOWNER] = {
eb69853d 2927 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 2928 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2929 | OP_MODIFIES_SOMETHING,
b001a1b6 2930 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 2931 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2932 },
069b6ad4
AA		 2933
2934 /* NFSv4.1 operations */
2935 [OP_EXCHANGE_ID] = {
eb69853d 2936 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 2937 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2938 | OP_MODIFIES_SOMETHING,
069b6ad4 2939 .op_name = "OP_EXCHANGE_ID",
1c122638 2940 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 2941 },
cb73a9f4 2942 [OP_BACKCHANNEL_CTL] = {
eb69853d 2943 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 2944 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
2945 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 2946 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 2947 },
1d1bc8f2 2948 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 2949 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 2950 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2951 | OP_MODIFIES_SOMETHING,
1d1bc8f2 2952 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 2953 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 2954 },
069b6ad4 2955 [OP_CREATE_SESSION] = {
eb69853d 2956 .op_func = nfsd4_create_session,
58e7b33a
MJ		 2957 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2958 | OP_MODIFIES_SOMETHING,
069b6ad4 2959 .op_name = "OP_CREATE_SESSION",
1c122638 2960 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 2961 },
2962 [OP_DESTROY_SESSION] = {
eb69853d 2963 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 2964 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2965 | OP_MODIFIES_SOMETHING,
069b6ad4 2966 .op_name = "OP_DESTROY_SESSION",
1c122638 2967 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 2968 },
2969 [OP_SEQUENCE] = {
eb69853d 2970 .op_func = nfsd4_sequence,
f9bb94c4 2971 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 2972 .op_name = "OP_SEQUENCE",
1c122638 2973 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 2974 },
094b5d74 2975 [OP_DESTROY_CLIENTID] = {
eb69853d 2976 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 2977 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
2978 | OP_MODIFIES_SOMETHING,
094b5d74 2979 .op_name = "OP_DESTROY_CLIENTID",
1c122638 2980 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 2981 },
4dc6ec00 2982 [OP_RECLAIM_COMPLETE] = {
eb69853d 2983 .op_func = nfsd4_reclaim_complete,
58e7b33a 2984 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 2985 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 2986 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 2987 },
04f4ad16 2988 [OP_SECINFO_NO_NAME] = {
eb69853d 2989 .op_func = nfsd4_secinfo_no_name,
ec572b9e 2990 .op_release = nfsd4_secinfo_no_name_release,
68d93184 2991 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 2992 .op_name = "OP_SECINFO_NO_NAME",
1c122638 2993 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 2994 },
17456804 2995 [OP_TEST_STATEID] = {
eb69853d 2996 .op_func = nfsd4_test_stateid,
17456804
BS		 2997 .op_flags = ALLOWED_WITHOUT_FH,
2998 .op_name = "OP_TEST_STATEID",
1c122638 2999 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 3000 },
e1ca12df 3001 [OP_FREE_STATEID] = {
eb69853d 3002 .op_func = nfsd4_free_stateid,
58e7b33a 3003 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 3004 .op_name = "OP_FREE_STATEID",
57832e7b 3005 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 3006 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 3007 },
9cf514cc
CH		 3008#ifdef CONFIG_NFSD_PNFS
3009 [OP_GETDEVICEINFO] = {
eb69853d 3010 .op_func = nfsd4_getdeviceinfo,
34b1744c 3011 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 3012 .op_flags = ALLOWED_WITHOUT_FH,
3013 .op_name = "OP_GETDEVICEINFO",
1c122638 3014 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 3015 },
3016 [OP_LAYOUTGET] = {
eb69853d 3017 .op_func = nfsd4_layoutget,
34b1744c 3018 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 3019 .op_flags = OP_MODIFIES_SOMETHING,
3020 .op_name = "OP_LAYOUTGET",
1c122638 3021 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 3022 },
3023 [OP_LAYOUTCOMMIT] = {
eb69853d 3024 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 3025 .op_flags = OP_MODIFIES_SOMETHING,
3026 .op_name = "OP_LAYOUTCOMMIT",
1c122638 3027 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 3028 },
3029 [OP_LAYOUTRETURN] = {
eb69853d 3030 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 3031 .op_flags = OP_MODIFIES_SOMETHING,
3032 .op_name = "OP_LAYOUTRETURN",
1c122638 3033 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 3034 },
3035#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 3036
3037 /* NFSv4.2 operations */
95d871f0 3038 [OP_ALLOCATE] = {
eb69853d 3039 .op_func = nfsd4_allocate,
03b31f48 3040 .op_flags = OP_MODIFIES_SOMETHING,
95d871f0 3041 .op_name = "OP_ALLOCATE",
1c122638 3042 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 3043 },
b0cb9085 3044 [OP_DEALLOCATE] = {
eb69853d 3045 .op_func = nfsd4_deallocate,
03b31f48 3046 .op_flags = OP_MODIFIES_SOMETHING,
b0cb9085 3047 .op_name = "OP_DEALLOCATE",
1c122638 3048 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 3049 },
ffa0160a 3050 [OP_CLONE] = {
eb69853d 3051 .op_func = nfsd4_clone,
03b31f48 3052 .op_flags = OP_MODIFIES_SOMETHING,
ffa0160a 3053 .op_name = "OP_CLONE",
1c122638 3054 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 3055 },
29ae7f9d 3056 [OP_COPY] = {
eb69853d 3057 .op_func = nfsd4_copy,
03b31f48 3058 .op_flags = OP_MODIFIES_SOMETHING,
29ae7f9d 3059 .op_name = "OP_COPY",
1c122638 3060 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 3061 },
24bab491 3062 [OP_SEEK] = {
eb69853d 3063 .op_func = nfsd4_seek,
24bab491 3064 .op_name = "OP_SEEK",
1c122638 3065 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 3066 },
6308bc98
OK		 3067 [OP_OFFLOAD_STATUS] = {
3068 .op_func = nfsd4_offload_status,
3069 .op_name = "OP_OFFLOAD_STATUS",
3070 .op_rsize_bop = nfsd4_offload_status_rsize,
3071 },
885e2bf3
OK		 3072 [OP_OFFLOAD_CANCEL] = {
3073 .op_func = nfsd4_offload_cancel,
3074 .op_flags = OP_MODIFIES_SOMETHING,
3075 .op_name = "OP_OFFLOAD_CANCEL",
3076 .op_rsize_bop = nfsd4_only_status_rsize,
3077 },
51911868
OK		 3078 [OP_COPY_NOTIFY] = {
3079 .op_func = nfsd4_copy_notify,
3080 .op_flags = OP_MODIFIES_SOMETHING,
3081 .op_name = "OP_COPY_NOTIFY",
3082 .op_rsize_bop = nfsd4_copy_notify_rsize,
3083 },
b591480b
BF		 3084};
3085
ed941643
AE		 3086/**
3087 * nfsd4_spo_must_allow - Determine if the compound op contains an
3088 * operation that is allowed to be sent with machine credentials
3089 *
3090 * @rqstp: a pointer to the struct svc_rqst
3091 *
3092 * Checks to see if the compound contains a spo_must_allow op
3093 * and confirms that it was sent with the proper machine creds.
3094 */
3095
3096bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3097{
3098 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3099 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3100 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
3101 struct nfsd4_compound_state *cstate = &resp->cstate;
3102 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3103 u32 opiter;
3104
3105 if (!cstate->minorversion)
3106 return false;
3107
3108 if (cstate->spo_must_allowed == true)
3109 return true;
3110
3111 opiter = resp->opcnt;
3112 while (opiter < argp->opcnt) {
3113 this = &argp->ops[opiter++];
3114 if (test_bit(this->opnum, allow->u.longs) &&
3115 cstate->clp->cl_mach_cred &&
3116 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3117 cstate->spo_must_allowed = true;
3118 return true;
3119 }
3120 }
3121 cstate->spo_must_allowed = false;
3122 return false;
3123}
3124
4f0cefbf
BF		 3125int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3126{
05b7278d 3127 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 3128 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 3129
3130 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3131 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 3132}
3133
07d1f802
BF		 3134void warn_on_nonidempotent_op(struct nfsd4_op *op)
3135{
3136 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3137 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
3138 op->opnum, nfsd4_op_name(op->opnum));
3139 WARN_ON_ONCE(1);
3140 }
3141}
3142
f1c7f79b 3143static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 3144{
3145 if (opnum < ARRAY_SIZE(nfsd4_ops))
3146 return nfsd4_ops[opnum].op_name;
3147 return "unknown_operation";
3148}
3149
1da177e4 3150#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 3151struct nfsd4_voidargs { int dummy; };
3152
860bda29 3153static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 3154 [NFSPROC4_NULL] = {
f7235b6b 3155 .pc_func = nfsd4_proc_null,
63f8de37 3156 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 3157 .pc_argsize = sizeof(struct nfsd4_voidargs),
3158 .pc_ressize = sizeof(struct nfsd4_voidres),
3159 .pc_cachetype = RC_NOCACHE,
3160 .pc_xdrressize = 1,
3161 },
3162 [NFSPROC4_COMPOUND] = {
f7235b6b 3163 .pc_func = nfsd4_proc_compound,
026fec7e 3164 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 3165 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 3166 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3167 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 3168 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 3169 .pc_cachetype = RC_NOCACHE,
3170 .pc_xdrressize = NFSD_BUFSIZE/4,
3171 },
1da177e4
LT		 3172};
3173
7fd38af9 3174static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 3175const struct svc_version nfsd_version4 = {
5283b03e
JL		 3176 .vs_vers = 4,
3177 .vs_nproc = 2,
3178 .vs_proc = nfsd_procedures4,
7fd38af9 3179 .vs_count = nfsd_count3,
5283b03e
JL		 3180 .vs_dispatch = nfsd_dispatch,
3181 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3182 .vs_rpcb_optnl = true,
3183 .vs_need_cong_ctrl = true,
1da177e4
LT		 3184};
3185
3186/*
3187 * Local variables:
3188 * c-basic-offset: 8
3189 * End:
3190 */
Michael's Linux tree.