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NFSD: Correct type annotations in COPY XDR functions
[people/ms/linux.git] / fs / nfsd / nfs4proc.c
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1da177e4 1/*
1da177e4
LT		 2 * Server-side procedures for NFSv4.
3 *
4 * Copyright (c) 2002 The Regents of the University of Michigan.
5 * All rights reserved.
6 *
7 * Kendrick Smith <kmsmith@umich.edu>
8 * Andy Adamson <andros@umich.edu>
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 * 3. Neither the name of the University nor the names of its
20 * contributors may be used to endorse or promote products derived
21 * from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1da177e4 34 */
880a3a53 35#include <linux/fs_struct.h>
7e06b7f9 36#include <linux/file.h>
b0cb9085 37#include <linux/falloc.h>
5a0e3ad6 38#include <linux/slab.h>
e0639dc5 39#include <linux/kthread.h>
624322f1 40#include <linux/sunrpc/addr.h>
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;
df561f66 431 fallthrough;
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 568 struct nfsd4_access *access = &u->access;
c11d7fd1 569 u32 access_full;
eb69853d 570
c11d7fd1
FL		 571 access_full = NFS3_ACCESS_FULL;
572 if (cstate->minorversion >= 2)
573 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD |
574 NFS4_ACCESS_XAWRITE;
575
576 if (access->ac_req_access & ~access_full)
1da177e4
LT		 577 return nfserr_inval;
578
579 access->ac_resp_access = access->ac_req_access;
ca364317
BF		 580 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access,
581 &access->ac_supported);
1da177e4
LT		 582}
583
b9c0ef85 584static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net)
ab4684d1 585{
27c438f5 586 __be32 *verf = (__be32 *)verifier->data;
ab4684d1 587
27c438f5
TM		 588 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data));
589
590 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id));
ab4684d1
CL		 591}
592
7191155b 593static __be32
ca364317 594nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 595 union nfsd4_op_u *u)
1da177e4 596{
eb69853d
CH		 597 struct nfsd4_commit *commit = &u->commit;
598
75c096f7 599 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset,
524ff1af
TM		 600 commit->co_count,
601 (__be32 *)commit->co_verf.data);
1da177e4
LT		 602}
603
b37ad28b 604static __be32
ca364317 605nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 606 union nfsd4_op_u *u)
1da177e4 607{
eb69853d 608 struct nfsd4_create *create = &u->create;
1da177e4 609 struct svc_fh resfh;
b37ad28b 610 __be32 status;
1da177e4
LT		 611 dev_t rdev;
612
613 fh_init(&resfh, NFS4_FHSIZE);
614
fa08139d 615 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP);
1da177e4
LT		 616 if (status)
617 return status;
618
3c8e0316
YZ		 619 status = check_attr_support(rqstp, cstate, create->cr_bmval,
620 nfsd_attrmask);
621 if (status)
622 return status;
623
880a3a53 624 current->fs->umask = create->cr_umask;
1da177e4
LT		 625 switch (create->cr_type) {
626 case NF4LNK:
ca364317
BF		 627 status = nfsd_symlink(rqstp, &cstate->current_fh,
628 create->cr_name, create->cr_namelen,
1e444f5b 629 create->cr_data, &resfh);
1da177e4
LT		 630 break;
631
632 case NF4BLK:
880a3a53 633 status = nfserr_inval;
1da177e4
LT		 634 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
635 if (MAJOR(rdev) != create->cr_specdata1 ||
636 MINOR(rdev) != create->cr_specdata2)
880a3a53 637 goto out_umask;
ca364317
BF		 638 status = nfsd_create(rqstp, &cstate->current_fh,
639 create->cr_name, create->cr_namelen,
640 &create->cr_iattr, S_IFBLK, rdev, &resfh);
1da177e4
LT		 641 break;
642
643 case NF4CHR:
880a3a53 644 status = nfserr_inval;
1da177e4
LT		 645 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2);
646 if (MAJOR(rdev) != create->cr_specdata1 ||
647 MINOR(rdev) != create->cr_specdata2)
880a3a53 648 goto out_umask;
ca364317
BF		 649 status = nfsd_create(rqstp, &cstate->current_fh,
650 create->cr_name, create->cr_namelen,
651 &create->cr_iattr,S_IFCHR, rdev, &resfh);
1da177e4
LT		 652 break;
653
654 case NF4SOCK:
ca364317
BF		 655 status = nfsd_create(rqstp, &cstate->current_fh,
656 create->cr_name, create->cr_namelen,
657 &create->cr_iattr, S_IFSOCK, 0, &resfh);
1da177e4
LT		 658 break;
659
660 case NF4FIFO:
ca364317
BF		 661 status = nfsd_create(rqstp, &cstate->current_fh,
662 create->cr_name, create->cr_namelen,
663 &create->cr_iattr, S_IFIFO, 0, &resfh);
1da177e4
LT		 664 break;
665
666 case NF4DIR:
667 create->cr_iattr.ia_valid &= ~ATTR_SIZE;
ca364317
BF		 668 status = nfsd_create(rqstp, &cstate->current_fh,
669 create->cr_name, create->cr_namelen,
670 &create->cr_iattr, S_IFDIR, 0, &resfh);
1da177e4
LT		 671 break;
672
673 default:
674 status = nfserr_badtype;
675 }
676
9208faf2
YZ		 677 if (status)
678 goto out;
1da177e4 679
18032ca0
DQ		 680 if (create->cr_label.len)
681 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval);
682
9208faf2
YZ		 683 if (create->cr_acl != NULL)
684 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl,
685 create->cr_bmval);
686
687 fh_unlock(&cstate->current_fh);
688 set_change_info(&create->cr_cinfo, &cstate->current_fh);
689 fh_dup2(&cstate->current_fh, &resfh);
690out:
1da177e4 691 fh_put(&resfh);
880a3a53
BF		 692out_umask:
693 current->fs->umask = 0;
1da177e4
LT		 694 return status;
695}
696
7191155b 697static __be32
ca364317 698nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 699 union nfsd4_op_u *u)
1da177e4 700{
eb69853d 701 struct nfsd4_getattr *getattr = &u->getattr;
b37ad28b 702 __be32 status;
1da177e4 703
8837abca 704 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 705 if (status)
706 return status;
707
708 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
709 return nfserr_inval;
710
916d2d84
BF		 711 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
712 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
713 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 714
ca364317 715 getattr->ga_fhp = &cstate->current_fh;
1da177e4
LT		 716 return nfs_ok;
717}
718
7191155b 719static __be32
ca364317 720nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 721 union nfsd4_op_u *u)
1da177e4 722{
eb69853d 723 struct nfsd4_link *link = &u->link;
95424460 724 __be32 status;
1da177e4 725
ca364317
BF		 726 status = nfsd_link(rqstp, &cstate->current_fh,
727 link->li_name, link->li_namelen, &cstate->save_fh);
1da177e4 728 if (!status)
ca364317 729 set_change_info(&link->li_cinfo, &cstate->current_fh);
1da177e4
LT		 730 return status;
731}
732
0ff7ab46 733static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh)
1da177e4
LT		 734{
735 struct svc_fh tmp_fh;
b37ad28b 736 __be32 ret;
1da177e4
LT		 737
738 fh_init(&tmp_fh, NFS4_FHSIZE);
df547efb
BF		 739 ret = exp_pseudoroot(rqstp, &tmp_fh);
740 if (ret)
1da177e4 741 return ret;
0ff7ab46 742 if (tmp_fh.fh_dentry == fh->fh_dentry) {
1da177e4
LT		 743 fh_put(&tmp_fh);
744 return nfserr_noent;
745 }
746 fh_put(&tmp_fh);
0ff7ab46
BF		 747 return nfsd_lookup(rqstp, fh, "..", 2, fh);
748}
749
750static __be32
751nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 752 union nfsd4_op_u *u)
0ff7ab46
BF		 753{
754 return nfsd4_do_lookupp(rqstp, &cstate->current_fh);
1da177e4
LT		 755}
756
7191155b 757static __be32
ca364317 758nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 759 union nfsd4_op_u *u)
1da177e4 760{
ca364317 761 return nfsd_lookup(rqstp, &cstate->current_fh,
eb69853d 762 u->lookup.lo_name, u->lookup.lo_len,
ca364317 763 &cstate->current_fh);
1da177e4
LT		 764}
765
7191155b 766static __be32
ca364317 767nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 768 union nfsd4_op_u *u)
1da177e4 769{
eb69853d 770 struct nfsd4_read *read = &u->read;
b37ad28b 771 __be32 status;
1da177e4 772
5c4583b2 773 read->rd_nf = NULL;
1da177e4
LT		 774 if (read->rd_offset >= OFFSET_MAX)
775 return nfserr_inval;
776
87c5942e
CL		 777 trace_nfsd_read_start(rqstp, &cstate->current_fh,
778 read->rd_offset, read->rd_length);
779
9b3234b9
BF		 780 /*
781 * If we do a zero copy read, then a client will see read data
782 * that reflects the state of the file *after* performing the
783 * following compound.
784 *
785 * To ensure proper ordering, we therefore turn off zero copy if
786 * the client wants us to do more in this compound:
787 */
788 if (!nfsd4_last_compound_op(rqstp))
779fb0f3 789 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags);
9b3234b9 790
1da177e4 791 /* check stateid */
aa0d6aed
AS		 792 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
793 &read->rd_stateid, RD_STATE,
624322f1 794 &read->rd_nf, NULL);
af90f707 795 if (status) {
1da177e4
LT		 796 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n");
797 goto out;
798 }
799 status = nfs_ok;
800out:
1da177e4 801 read->rd_rqstp = rqstp;
ca364317 802 read->rd_fhp = &cstate->current_fh;
1da177e4
LT		 803 return status;
804}
805
34b1744c
BF		 806
807static void
808nfsd4_read_release(union nfsd4_op_u *u)
809{
5c4583b2
JL		 810 if (u->read.rd_nf)
811 nfsd_file_put(u->read.rd_nf);
87c5942e
CL		 812 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp,
813 u->read.rd_offset, u->read.rd_length);
34b1744c
BF		 814}
815
7191155b 816static __be32
ca364317 817nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 818 union nfsd4_op_u *u)
1da177e4 819{
eb69853d 820 struct nfsd4_readdir *readdir = &u->readdir;
1da177e4
LT		 821 u64 cookie = readdir->rd_cookie;
822 static const nfs4_verifier zeroverf;
823
824 /* no need to check permission - this will be done in nfsd_readdir() */
825
826 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)
827 return nfserr_inval;
828
916d2d84
BF		 829 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0];
830 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1];
831 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2];
1da177e4 832
832023bf 833 if ((cookie == 1) || (cookie == 2) ||
1da177e4
LT		 834 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE)))
835 return nfserr_bad_cookie;
836
837 readdir->rd_rqstp = rqstp;
ca364317 838 readdir->rd_fhp = &cstate->current_fh;
1da177e4
LT		 839 return nfs_ok;
840}
841
7191155b 842static __be32
ca364317 843nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 844 union nfsd4_op_u *u)
1da177e4 845{
eb69853d
CH		 846 u->readlink.rl_rqstp = rqstp;
847 u->readlink.rl_fhp = &cstate->current_fh;
1da177e4
LT		 848 return nfs_ok;
849}
850
7191155b 851static __be32
ca364317 852nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 853 union nfsd4_op_u *u)
1da177e4 854{
eb69853d 855 struct nfsd4_remove *remove = &u->remove;
b37ad28b 856 __be32 status;
1da177e4 857
c87fb4a3 858 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 859 return nfserr_grace;
ca364317
BF		 860 status = nfsd_unlink(rqstp, &cstate->current_fh, 0,
861 remove->rm_name, remove->rm_namelen);
1da177e4 862 if (!status) {
ca364317
BF		 863 fh_unlock(&cstate->current_fh);
864 set_change_info(&remove->rm_cinfo, &cstate->current_fh);
1da177e4
LT		 865 }
866 return status;
867}
868
7191155b 869static __be32
ca364317 870nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 871 union nfsd4_op_u *u)
1da177e4 872{
eb69853d 873 struct nfsd4_rename *rename = &u->rename;
95424460 874 __be32 status;
1da177e4 875
f8f71d00 876 if (opens_in_grace(SVC_NET(rqstp)))
c815afc7 877 return nfserr_grace;
ca364317
BF		 878 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname,
879 rename->rn_snamelen, &cstate->current_fh,
1da177e4 880 rename->rn_tname, rename->rn_tnamelen);
2a6cf944
BF		 881 if (status)
882 return status;
883 set_change_info(&rename->rn_sinfo, &cstate->current_fh);
884 set_change_info(&rename->rn_tinfo, &cstate->save_fh);
885 return nfs_ok;
1da177e4
LT		 886}
887
dcb488a3
AA		 888static __be32
889nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 890 union nfsd4_op_u *u)
dcb488a3 891{
eb69853d 892 struct nfsd4_secinfo *secinfo = &u->secinfo;
dcb488a3
AA		 893 struct svc_export *exp;
894 struct dentry *dentry;
895 __be32 err;
896
29a78a3e
BF		 897 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC);
898 if (err)
899 return err;
dcb488a3
AA		 900 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh,
901 secinfo->si_name, secinfo->si_namelen,
902 &exp, &dentry);
903 if (err)
904 return err;
2f6fc056 905 fh_unlock(&cstate->current_fh);
2b0143b5 906 if (d_really_is_negative(dentry)) {
dcb488a3
AA		 907 exp_put(exp);
908 err = nfserr_noent;
909 } else
910 secinfo->si_exp = exp;
911 dput(dentry);
56560b9a
BF		 912 if (cstate->minorversion)
913 /* See rfc 5661 section 2.6.3.1.1.8 */
914 fh_put(&cstate->current_fh);
dcb488a3
AA		 915 return err;
916}
917
04f4ad16
BF		 918static __be32
919nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 920 union nfsd4_op_u *u)
04f4ad16
BF		 921{
922 __be32 err;
923
eb69853d 924 switch (u->secinfo_no_name.sin_style) {
04f4ad16
BF		 925 case NFS4_SECINFO_STYLE4_CURRENT_FH:
926 break;
927 case NFS4_SECINFO_STYLE4_PARENT:
928 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh);
929 if (err)
930 return err;
931 break;
932 default:
933 return nfserr_inval;
934 }
bf18f163 935
eb69853d 936 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export);
04f4ad16
BF		 937 fh_put(&cstate->current_fh);
938 return nfs_ok;
939}
940
34b1744c
BF		 941static void
942nfsd4_secinfo_release(union nfsd4_op_u *u)
943{
944 if (u->secinfo.si_exp)
945 exp_put(u->secinfo.si_exp);
946}
947
ec572b9e
EG		 948static void
949nfsd4_secinfo_no_name_release(union nfsd4_op_u *u)
950{
951 if (u->secinfo_no_name.sin_exp)
952 exp_put(u->secinfo_no_name.sin_exp);
953}
954
7191155b 955static __be32
ca364317 956nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 957 union nfsd4_op_u *u)
1da177e4 958{
eb69853d 959 struct nfsd4_setattr *setattr = &u->setattr;
b37ad28b 960 __be32 status = nfs_ok;
96f6f985 961 int err;
1da177e4 962
1da177e4 963 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
af90f707 964 status = nfs4_preprocess_stateid_op(rqstp, cstate,
aa0d6aed 965 &cstate->current_fh, &setattr->sa_stateid,
624322f1 966 WR_STATE, NULL, NULL);
375c5547 967 if (status) {
3e3b4800 968 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n");
375c5547
BF		 969 return status;
970 }
1da177e4 971 }
96f6f985
AV		 972 err = fh_want_write(&cstate->current_fh);
973 if (err)
974 return nfserrno(err);
1da177e4 975 status = nfs_ok;
3c8e0316
YZ		 976
977 status = check_attr_support(rqstp, cstate, setattr->sa_bmval,
978 nfsd_attrmask);
979 if (status)
980 goto out;
981
1da177e4 982 if (setattr->sa_acl != NULL)
ca364317
BF		 983 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh,
984 setattr->sa_acl);
1da177e4 985 if (status)
18f335af 986 goto out;
18032ca0
DQ		 987 if (setattr->sa_label.len)
988 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh,
989 &setattr->sa_label);
990 if (status)
991 goto out;
ca364317 992 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr,
2a1aa489 993 0, (time64_t)0);
18f335af 994out:
bad0dcff 995 fh_drop_write(&cstate->current_fh);
1da177e4
LT		 996 return status;
997}
998
7191155b 999static __be32
ca364317 1000nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1001 union nfsd4_op_u *u)
1da177e4 1002{
eb69853d 1003 struct nfsd4_write *write = &u->write;
1da177e4 1004 stateid_t *stateid = &write->wr_stateid;
5c4583b2 1005 struct nfsd_file *nf = NULL;
b37ad28b 1006 __be32 status = nfs_ok;
31dec253 1007 unsigned long cnt;
ffe1137b 1008 int nvecs;
1da177e4 1009
1da177e4
LT		 1010 if (write->wr_offset >= OFFSET_MAX)
1011 return nfserr_inval;
1012
d890be15
CL		 1013 cnt = write->wr_buflen;
1014 trace_nfsd_write_start(rqstp, &cstate->current_fh,
1015 write->wr_offset, cnt);
aa0d6aed 1016 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1017 stateid, WR_STATE, &nf, NULL);
375c5547
BF		 1018 if (status) {
1019 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
1020 return status;
1021 }
1022
1da177e4 1023 write->wr_how_written = write->wr_stable_how;
1da177e4 1024
3fd9557a
CL		 1025 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist,
1026 &write->wr_head, write->wr_buflen);
ffe1137b
BF		 1027 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec));
1028
16f8f894 1029 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf,
af90f707 1030 write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
19e0663f
TM		 1031 write->wr_how_written,
1032 (__be32 *)write->wr_verifier.data);
5c4583b2 1033 nfsd_file_put(nf);
1da177e4 1034
31dec253 1035 write->wr_bytes_written = cnt;
d890be15
CL		 1036 trace_nfsd_write_done(rqstp, &cstate->current_fh,
1037 write->wr_offset, cnt);
1da177e4 1038 return status;
1da177e4
LT		 1039}
1040
ffa0160a 1041static __be32
29ae7f9d 1042nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
5c4583b2
JL		 1043 stateid_t *src_stateid, struct nfsd_file **src,
1044 stateid_t *dst_stateid, struct nfsd_file **dst)
ffa0160a 1045{
ffa0160a
CH		 1046 __be32 status;
1047
01310bb7
SM		 1048 if (!cstate->save_fh.fh_dentry)
1049 return nfserr_nofilehandle;
1050
ffa0160a 1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh,
624322f1 1052 src_stateid, RD_STATE, src, NULL);
ffa0160a
CH		 1053 if (status) {
1054 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__);
1055 goto out;
1056 }
1057
1058 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
624322f1 1059 dst_stateid, WR_STATE, dst, NULL);
ffa0160a
CH		 1060 if (status) {
1061 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__);
1062 goto out_put_src;
1063 }
1064
1065 /* fix up for NFS-specific error code */
5c4583b2
JL		 1066 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) ||
1067 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) {
ffa0160a
CH		 1068 status = nfserr_wrong_type;
1069 goto out_put_dst;
1070 }
1071
29ae7f9d
AS		 1072out:
1073 return status;
1074out_put_dst:
5c4583b2 1075 nfsd_file_put(*dst);
29ae7f9d 1076out_put_src:
5c4583b2 1077 nfsd_file_put(*src);
29ae7f9d
AS		 1078 goto out;
1079}
1080
1081static __be32
1082nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1083 union nfsd4_op_u *u)
29ae7f9d 1084{
eb69853d 1085 struct nfsd4_clone *clone = &u->clone;
5c4583b2 1086 struct nfsd_file *src, *dst;
29ae7f9d
AS		 1087 __be32 status;
1088
1089 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src,
1090 &clone->cl_dst_stateid, &dst);
1091 if (status)
1092 goto out;
1093
b66ae6dd
TM		 1094 status = nfsd4_clone_file_range(src, clone->cl_src_pos,
1095 dst, clone->cl_dst_pos, clone->cl_count,
a25e3726 1096 EX_ISSYNC(cstate->current_fh.fh_export));
ffa0160a 1097
5c4583b2
JL		 1098 nfsd_file_put(dst);
1099 nfsd_file_put(src);
ffa0160a
CH		 1100out:
1101 return status;
1102}
1103
e0639dc5
OK		 1104void nfs4_put_copy(struct nfsd4_copy *copy)
1105{
1106 if (!refcount_dec_and_test(&copy->refcount))
1107 return;
1108 kfree(copy);
1109}
1110
1111static bool
1112check_and_set_stop_copy(struct nfsd4_copy *copy)
1113{
1114 bool value;
1115
1116 spin_lock(&copy->cp_clp->async_lock);
1117 value = copy->stopped;
1118 if (!copy->stopped)
1119 copy->stopped = true;
1120 spin_unlock(&copy->cp_clp->async_lock);
1121 return value;
1122}
1123
1124static void nfsd4_stop_copy(struct nfsd4_copy *copy)
1125{
1126 /* only 1 thread should stop the copy */
1127 if (!check_and_set_stop_copy(copy))
1128 kthread_stop(copy->copy_task);
1129 nfs4_put_copy(copy);
1130}
1131
1132static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp)
1133{
1134 struct nfsd4_copy *copy = NULL;
1135
1136 spin_lock(&clp->async_lock);
1137 if (!list_empty(&clp->async_copies)) {
1138 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy,
1139 copies);
1140 refcount_inc(&copy->refcount);
1141 }
1142 spin_unlock(&clp->async_lock);
1143 return copy;
1144}
1145
1146void nfsd4_shutdown_copy(struct nfs4_client *clp)
1147{
1148 struct nfsd4_copy *copy;
1149
1150 while ((copy = nfsd4_get_copy(clp)) != NULL)
1151 nfsd4_stop_copy(copy);
1152}
ce0887ac
OK		 1153#ifdef CONFIG_NFSD_V4_2_INTER_SSC
1154
1155extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1156 struct nfs_fh *src_fh,
1157 nfs4_stateid *stateid);
1158extern void nfs42_ssc_close(struct file *filep);
1159
1160extern void nfs_sb_deactive(struct super_block *sb);
1161
1162#define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys"
1163
f2453978 1164/*
ce0887ac
OK		 1165 * Support one copy source server for now.
1166 */
1167static __be32
1168nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp,
1169 struct vfsmount **mount)
1170{
1171 struct file_system_type *type;
1172 struct vfsmount *ss_mnt;
1173 struct nfs42_netaddr *naddr;
1174 struct sockaddr_storage tmp_addr;
1175 size_t tmp_addrlen, match_netid_len = 3;
1176 char *startsep = "", *endsep = "", *match_netid = "tcp";
1177 char *ipaddr, *dev_name, *raw_data;
b8290ca2
OK		 1178 int len, raw_len;
1179 __be32 status = nfserr_inval;
ce0887ac
OK		 1180
1181 naddr = &nss->u.nl4_addr;
1182 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr,
1183 naddr->addr_len,
1184 (struct sockaddr *)&tmp_addr,
1185 sizeof(tmp_addr));
1186 if (tmp_addrlen == 0)
1187 goto out_err;
1188
1189 if (tmp_addr.ss_family == AF_INET6) {
1190 startsep = "[";
1191 endsep = "]";
1192 match_netid = "tcp6";
1193 match_netid_len = 4;
1194 }
1195
1196 if (naddr->netid_len != match_netid_len ||
1197 strncmp(naddr->netid, match_netid, naddr->netid_len))
1198 goto out_err;
1199
1200 /* Construct the raw data for the vfs_kern_mount call */
1201 len = RPC_MAX_ADDRBUFLEN + 1;
1202 ipaddr = kzalloc(len, GFP_KERNEL);
1203 if (!ipaddr)
1204 goto out_err;
1205
1206 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len);
1207
1208 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/
1209
1210 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr);
1211 raw_data = kzalloc(raw_len, GFP_KERNEL);
1212 if (!raw_data)
1213 goto out_free_ipaddr;
1214
1215 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr);
1216
b8290ca2 1217 status = nfserr_nodev;
ce0887ac
OK		 1218 type = get_fs_type("nfs");
1219 if (!type)
1220 goto out_free_rawdata;
1221
1222 /* Set the server:<export> for the vfs_kern_mount call */
1223 dev_name = kzalloc(len + 5, GFP_KERNEL);
1224 if (!dev_name)
1225 goto out_free_rawdata;
1226 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep);
1227
1228 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */
1229 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data);
1230 module_put(type->owner);
1231 if (IS_ERR(ss_mnt))
1232 goto out_free_devname;
1233
1234 status = 0;
1235 *mount = ss_mnt;
1236
1237out_free_devname:
1238 kfree(dev_name);
1239out_free_rawdata:
1240 kfree(raw_data);
1241out_free_ipaddr:
1242 kfree(ipaddr);
1243out_err:
1244 return status;
1245}
1246
1247static void
1248nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1249{
1250 nfs_sb_deactive(ss_mnt->mnt_sb);
1251 mntput(ss_mnt);
1252}
1253
f2453978 1254/*
ce0887ac 1255 * Verify COPY destination stateid.
f2453978 1256 *
ce0887ac
OK		 1257 * Connect to the source server with NFSv4.1.
1258 * Create the source struct file for nfsd_copy_range.
1259 * Called with COPY cstate:
1260 * SAVED_FH: source filehandle
1261 * CURRENT_FH: destination filehandle
ce0887ac
OK		 1262 */
1263static __be32
1264nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1265 struct nfsd4_compound_state *cstate,
1266 struct nfsd4_copy *copy, struct vfsmount **mount)
1267{
1268 struct svc_fh *s_fh = NULL;
1269 stateid_t *s_stid = &copy->cp_src_stateid;
b8290ca2 1270 __be32 status = nfserr_inval;
ce0887ac
OK		 1271
1272 /* Verify the destination stateid and set dst struct file*/
1273 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1274 &copy->cp_dst_stateid,
1275 WR_STATE, &copy->nf_dst, NULL);
1276 if (status)
1277 goto out;
1278
1279 status = nfsd4_interssc_connect(&copy->cp_src, rqstp, mount);
1280 if (status)
1281 goto out;
1282
1283 s_fh = &cstate->save_fh;
1284
1285 copy->c_fh.size = s_fh->fh_handle.fh_size;
1286 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size);
3f9544ca 1287 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation);
ce0887ac
OK		 1288 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque,
1289 sizeof(stateid_opaque_t));
1290
1291 status = 0;
1292out:
1293 return status;
1294}
1295
1296static void
1297nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1298 struct nfsd_file *dst)
1299{
1300 nfs42_ssc_close(src->nf_file);
1301 nfsd_file_put(src);
1302 nfsd_file_put(dst);
1303 mntput(ss_mnt);
1304}
1305
1306#else /* CONFIG_NFSD_V4_2_INTER_SSC */
1307
1308static __be32
1309nfsd4_setup_inter_ssc(struct svc_rqst *rqstp,
1310 struct nfsd4_compound_state *cstate,
1311 struct nfsd4_copy *copy,
1312 struct vfsmount **mount)
1313{
1314 *mount = NULL;
b8290ca2 1315 return nfserr_inval;
ce0887ac
OK		 1316}
1317
1318static void
1319nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src,
1320 struct nfsd_file *dst)
1321{
1322}
1323
1324static void
1325nfsd4_interssc_disconnect(struct vfsmount *ss_mnt)
1326{
1327}
1328
1329static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt,
1330 struct nfs_fh *src_fh,
1331 nfs4_stateid *stateid)
1332{
1333 return NULL;
1334}
1335#endif /* CONFIG_NFSD_V4_2_INTER_SSC */
1336
1337static __be32
1338nfsd4_setup_intra_ssc(struct svc_rqst *rqstp,
1339 struct nfsd4_compound_state *cstate,
1340 struct nfsd4_copy *copy)
1341{
1342 return nfsd4_verify_copy(rqstp, cstate, &copy->cp_src_stateid,
1343 &copy->nf_src, &copy->cp_dst_stateid,
1344 &copy->nf_dst);
1345}
1346
1347static void
1348nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst)
1349{
1350 nfsd_file_put(src);
1351 nfsd_file_put(dst);
1352}
e0639dc5
OK		 1353
1354static void nfsd4_cb_offload_release(struct nfsd4_callback *cb)
1355{
1356 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb);
1357
1358 nfs4_put_copy(copy);
1359}
1360
1361static int nfsd4_cb_offload_done(struct nfsd4_callback *cb,
1362 struct rpc_task *task)
1363{
1364 return 1;
1365}
1366
1367static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = {
1368 .release = nfsd4_cb_offload_release,
1369 .done = nfsd4_cb_offload_done
1370};
1371
1372static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync)
1373{
1374 copy->cp_res.wr_stable_how = NFS_UNSTABLE;
1375 copy->cp_synchronous = sync;
1376 gen_boot_verifier(&copy->cp_res.wr_verifier, copy->cp_clp->net);
1377}
1378
1379static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy)
1380{
1381 ssize_t bytes_copied = 0;
1382 size_t bytes_total = copy->cp_count;
1383 u64 src_pos = copy->cp_src_pos;
1384 u64 dst_pos = copy->cp_dst_pos;
1385
1386 do {
1387 if (kthread_should_stop())
1388 break;
5c4583b2
JL		 1389 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file,
1390 src_pos, copy->nf_dst->nf_file, dst_pos,
1391 bytes_total);
e0639dc5
OK		 1392 if (bytes_copied <= 0)
1393 break;
1394 bytes_total -= bytes_copied;
1395 copy->cp_res.wr_bytes_written += bytes_copied;
1396 src_pos += bytes_copied;
1397 dst_pos += bytes_copied;
1398 } while (bytes_total > 0 && !copy->cp_synchronous);
1399 return bytes_copied;
1400}
1401
1402static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync)
1403{
1404 __be32 status;
1405 ssize_t bytes;
1406
1407 bytes = _nfsd_copy_file_range(copy);
1408 /* for async copy, we ignore the error, client can always retry
1409 * to get the error
1410 */
1411 if (bytes < 0 && !copy->cp_res.wr_bytes_written)
1412 status = nfserrno(bytes);
1413 else {
1414 nfsd4_init_copy_res(copy, sync);
1415 status = nfs_ok;
1416 }
1417
ce0887ac
OK		 1418 if (!copy->cp_intra) /* Inter server SSC */
1419 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src,
1420 copy->nf_dst);
1421 else
1422 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst);
1423
e0639dc5
OK		 1424 return status;
1425}
1426
ce0887ac 1427static int dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst)
e0639dc5
OK		 1428{
1429 dst->cp_src_pos = src->cp_src_pos;
1430 dst->cp_dst_pos = src->cp_dst_pos;
1431 dst->cp_count = src->cp_count;
1432 dst->cp_synchronous = src->cp_synchronous;
1433 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res));
1434 memcpy(&dst->fh, &src->fh, sizeof(src->fh));
1435 dst->cp_clp = src->cp_clp;
5c4583b2 1436 dst->nf_dst = nfsd_file_get(src->nf_dst);
ce0887ac
OK		 1437 dst->cp_intra = src->cp_intra;
1438 if (src->cp_intra) /* for inter, file_src doesn't exist yet */
1439 dst->nf_src = nfsd_file_get(src->nf_src);
1440
e0639dc5 1441 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid));
ce0887ac
OK		 1442 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server));
1443 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid));
1444 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh));
1445 dst->ss_mnt = src->ss_mnt;
1446
1447 return 0;
e0639dc5
OK		 1448}
1449
1450static void cleanup_async_copy(struct nfsd4_copy *copy)
1451{
624322f1 1452 nfs4_free_copy_state(copy);
5c4583b2 1453 nfsd_file_put(copy->nf_dst);
2e577f0f
OK		 1454 if (copy->cp_intra)
1455 nfsd_file_put(copy->nf_src);
e0639dc5
OK		 1456 spin_lock(&copy->cp_clp->async_lock);
1457 list_del(&copy->copies);
1458 spin_unlock(&copy->cp_clp->async_lock);
1459 nfs4_put_copy(copy);
1460}
1461
1462static int nfsd4_do_async_copy(void *data)
1463{
1464 struct nfsd4_copy *copy = (struct nfsd4_copy *)data;
1465 struct nfsd4_copy *cb_copy;
1466
ce0887ac
OK		 1467 if (!copy->cp_intra) { /* Inter server SSC */
1468 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL);
1469 if (!copy->nf_src) {
1470 copy->nfserr = nfserr_serverfault;
1471 nfsd4_interssc_disconnect(copy->ss_mnt);
1472 goto do_callback;
1473 }
1474 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, &copy->c_fh,
1475 &copy->stateid);
1476 if (IS_ERR(copy->nf_src->nf_file)) {
ce0887ac
OK		 1477 copy->nfserr = nfserr_offload_denied;
1478 nfsd4_interssc_disconnect(copy->ss_mnt);
1479 goto do_callback;
1480 }
1481 }
1482
e0639dc5 1483 copy->nfserr = nfsd4_do_copy(copy, 0);
ce0887ac 1484do_callback:
e0639dc5
OK		 1485 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1486 if (!cb_copy)
1487 goto out;
1488 memcpy(&cb_copy->cp_res, &copy->cp_res, sizeof(copy->cp_res));
1489 cb_copy->cp_clp = copy->cp_clp;
1490 cb_copy->nfserr = copy->nfserr;
1491 memcpy(&cb_copy->fh, &copy->fh, sizeof(copy->fh));
1492 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp,
1493 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD);
1494 nfsd4_run_cb(&cb_copy->cp_cb);
1495out:
ce0887ac
OK		 1496 if (!copy->cp_intra)
1497 kfree(copy->nf_src);
e0639dc5
OK		 1498 cleanup_async_copy(copy);
1499 return 0;
1500}
1501
29ae7f9d
AS		 1502static __be32
1503nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1504 union nfsd4_op_u *u)
29ae7f9d 1505{
eb69853d 1506 struct nfsd4_copy *copy = &u->copy;
29ae7f9d 1507 __be32 status;
e0639dc5 1508 struct nfsd4_copy *async_copy = NULL;
29ae7f9d 1509
ce0887ac
OK		 1510 if (!copy->cp_intra) { /* Inter server SSC */
1511 if (!inter_copy_offload_enable || copy->cp_synchronous) {
1512 status = nfserr_notsupp;
1513 goto out;
1514 }
1515 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy,
1516 &copy->ss_mnt);
1517 if (status)
1518 return nfserr_offload_denied;
1519 } else {
1520 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy);
1521 if (status)
1522 return status;
1523 }
29ae7f9d 1524
e0639dc5
OK		 1525 copy->cp_clp = cstate->clp;
1526 memcpy(&copy->fh, &cstate->current_fh.fh_handle,
1527 sizeof(struct knfsd_fh));
1528 if (!copy->cp_synchronous) {
1529 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
29ae7f9d 1530
e0639dc5
OK		 1531 status = nfserrno(-ENOMEM);
1532 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL);
1533 if (!async_copy)
ce0887ac
OK		 1534 goto out_err;
1535 if (!nfs4_init_copy_state(nn, copy))
1536 goto out_err;
e0639dc5
OK		 1537 refcount_set(&async_copy->refcount, 1);
1538 memcpy(&copy->cp_res.cb_stateid, &copy->cp_stateid,
1539 sizeof(copy->cp_stateid));
ce0887ac
OK		 1540 status = dup_copy_fields(copy, async_copy);
1541 if (status)
1542 goto out_err;
e0639dc5
OK		 1543 async_copy->copy_task = kthread_create(nfsd4_do_async_copy,
1544 async_copy, "%s", "copy thread");
1545 if (IS_ERR(async_copy->copy_task))
1546 goto out_err;
1547 spin_lock(&async_copy->cp_clp->async_lock);
1548 list_add(&async_copy->copies,
1549 &async_copy->cp_clp->async_copies);
1550 spin_unlock(&async_copy->cp_clp->async_lock);
1551 wake_up_process(async_copy->copy_task);
29ae7f9d 1552 status = nfs_ok;
ce0887ac 1553 } else {
e0639dc5 1554 status = nfsd4_do_copy(copy, 1);
ce0887ac 1555 }
29ae7f9d
AS		 1556out:
1557 return status;
e0639dc5 1558out_err:
18f428d4
OK		 1559 if (async_copy)
1560 cleanup_async_copy(async_copy);
ce0887ac
OK		 1561 status = nfserrno(-ENOMEM);
1562 if (!copy->cp_intra)
1563 nfsd4_interssc_disconnect(copy->ss_mnt);
e0639dc5
OK		 1564 goto out;
1565}
1566
1567struct nfsd4_copy *
1568find_async_copy(struct nfs4_client *clp, stateid_t *stateid)
1569{
1570 struct nfsd4_copy *copy;
1571
1572 spin_lock(&clp->async_lock);
1573 list_for_each_entry(copy, &clp->async_copies, copies) {
ce0887ac 1574 if (memcmp(&copy->cp_stateid.stid, stateid, NFS4_STATEID_SIZE))
e0639dc5
OK		 1575 continue;
1576 refcount_inc(&copy->refcount);
1577 spin_unlock(&clp->async_lock);
1578 return copy;
1579 }
1580 spin_unlock(&clp->async_lock);
1581 return NULL;
29ae7f9d
AS		 1582}
1583
885e2bf3
OK		 1584static __be32
1585nfsd4_offload_cancel(struct svc_rqst *rqstp,
1586 struct nfsd4_compound_state *cstate,
1587 union nfsd4_op_u *u)
1588{
e0639dc5 1589 struct nfsd4_offload_status *os = &u->offload_status;
e0639dc5
OK		 1590 struct nfsd4_copy *copy;
1591 struct nfs4_client *clp = cstate->clp;
1592
1593 copy = find_async_copy(clp, &os->stateid);
ce0887ac
OK		 1594 if (!copy) {
1595 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1596
1597 return manage_cpntf_state(nn, &os->stateid, clp, NULL);
1598 } else
e0639dc5 1599 nfsd4_stop_copy(copy);
e0639dc5 1600
ce0887ac 1601 return nfs_ok;
885e2bf3
OK		 1602}
1603
51911868
OK		 1604static __be32
1605nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1606 union nfsd4_op_u *u)
1607{
624322f1
OK		 1608 struct nfsd4_copy_notify *cn = &u->copy_notify;
1609 __be32 status;
1610 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
1611 struct nfs4_stid *stid;
1612 struct nfs4_cpntf_state *cps;
1613 struct nfs4_client *clp = cstate->clp;
1614
1615 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
1616 &cn->cpn_src_stateid, RD_STATE, NULL,
1617 &stid);
1618 if (status)
1619 return status;
1620
1621 cn->cpn_sec = nn->nfsd4_lease;
1622 cn->cpn_nsec = 0;
1623
1624 status = nfserrno(-ENOMEM);
1625 cps = nfs4_alloc_init_cpntf_state(nn, stid);
1626 if (!cps)
1627 goto out;
1628 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t));
1629 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t));
1630 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t));
1631
1632 /* For now, only return one server address in cpn_src, the
1633 * address used by the client to connect to this server.
1634 */
1635 cn->cpn_src.nl4_type = NL4_NETADDR;
1636 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr,
1637 &cn->cpn_src.u.nl4_addr);
1638 WARN_ON_ONCE(status);
1639 if (status) {
1640 nfs4_put_cpntf_state(nn, cps);
1641 goto out;
1642 }
1643out:
1644 nfs4_put_stid(stid);
1645 return status;
51911868
OK		 1646}
1647
95d871f0
AS		 1648static __be32
1649nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
1650 struct nfsd4_fallocate *fallocate, int flags)
1651{
0d4d6720 1652 __be32 status;
5c4583b2 1653 struct nfsd_file *nf;
95d871f0 1654
aa0d6aed 1655 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
95d871f0 1656 &fallocate->falloc_stateid,
624322f1 1657 WR_STATE, &nf, NULL);
95d871f0
AS		 1658 if (status != nfs_ok) {
1659 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n");
1660 return status;
1661 }
1662
5c4583b2 1663 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file,
95d871f0
AS		 1664 fallocate->falloc_offset,
1665 fallocate->falloc_length,
1666 flags);
5c4583b2 1667 nfsd_file_put(nf);
95d871f0
AS		 1668 return status;
1669}
6308bc98
OK		 1670static __be32
1671nfsd4_offload_status(struct svc_rqst *rqstp,
1672 struct nfsd4_compound_state *cstate,
1673 union nfsd4_op_u *u)
1674{
e0639dc5
OK		 1675 struct nfsd4_offload_status *os = &u->offload_status;
1676 __be32 status = 0;
1677 struct nfsd4_copy *copy;
1678 struct nfs4_client *clp = cstate->clp;
1679
1680 copy = find_async_copy(clp, &os->stateid);
1681 if (copy) {
1682 os->count = copy->cp_res.wr_bytes_written;
1683 nfs4_put_copy(copy);
1684 } else
1685 status = nfserr_bad_stateid;
1686
1687 return status;
6308bc98 1688}
95d871f0
AS		 1689
1690static __be32
1691nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1692 union nfsd4_op_u *u)
95d871f0 1693{
eb69853d 1694 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0);
95d871f0
AS		 1695}
1696
b0cb9085
AS		 1697static __be32
1698nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1699 union nfsd4_op_u *u)
b0cb9085 1700{
eb69853d 1701 return nfsd4_fallocate(rqstp, cstate, &u->deallocate,
b0cb9085
AS		 1702 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE);
1703}
1704
24bab491
AS		 1705static __be32
1706nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1707 union nfsd4_op_u *u)
24bab491 1708{
eb69853d 1709 struct nfsd4_seek *seek = &u->seek;
24bab491
AS		 1710 int whence;
1711 __be32 status;
5c4583b2 1712 struct nfsd_file *nf;
24bab491 1713
aa0d6aed 1714 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh,
24bab491 1715 &seek->seek_stateid,
624322f1 1716 RD_STATE, &nf, NULL);
24bab491
AS		 1717 if (status) {
1718 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n");
1719 return status;
1720 }
1721
1722 switch (seek->seek_whence) {
1723 case NFS4_CONTENT_DATA:
1724 whence = SEEK_DATA;
1725 break;
1726 case NFS4_CONTENT_HOLE:
1727 whence = SEEK_HOLE;
1728 break;
1729 default:
1730 status = nfserr_union_notsupp;
1731 goto out;
1732 }
1733
1734 /*
1735 * Note: This call does change file->f_pos, but nothing in NFSD
1736 * should ever file->f_pos.
1737 */
5c4583b2 1738 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence);
24bab491
AS		 1739 if (seek->seek_pos < 0)
1740 status = nfserrno(seek->seek_pos);
5c4583b2 1741 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file)))
24bab491
AS		 1742 seek->seek_eof = true;
1743
1744out:
5c4583b2 1745 nfsd_file_put(nf);
24bab491
AS		 1746 return status;
1747}
1748
1da177e4
LT		 1749/* This routine never returns NFS_OK! If there are no other errors, it
1750 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the
1751 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME
1752 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK.
1753 */
b37ad28b 1754static __be32
c954e2a5 1755_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
ca364317 1756 struct nfsd4_verify *verify)
1da177e4 1757{
2ebbc012 1758 __be32 *buf, *p;
1da177e4 1759 int count;
b37ad28b 1760 __be32 status;
1da177e4 1761
8837abca 1762 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP);
1da177e4
LT		 1763 if (status)
1764 return status;
1765
3c8e0316
YZ		 1766 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL);
1767 if (status)
1768 return status;
1769
1da177e4
LT		 1770 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)
1771 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1))
1772 return nfserr_inval;
1773 if (verify->ve_attrlen & 3)
1774 return nfserr_inval;
1775
1776 /* count in words:
1777 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4
1778 */
1779 count = 4 + (verify->ve_attrlen >> 2);
1780 buf = kmalloc(count << 2, GFP_KERNEL);
1781 if (!buf)
3e772463 1782 return nfserr_jukebox;
1da177e4 1783
84822d0b 1784 p = buf;
d5184658 1785 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh,
ca364317 1786 cstate->current_fh.fh_export,
d5184658
BF		 1787 cstate->current_fh.fh_dentry,
1788 verify->ve_bmval,
406a7ea9 1789 rqstp, 0);
41ae6e71
BF		 1790 /*
1791 * If nfsd4_encode_fattr() ran out of space, assume that's because
1792 * the attributes are longer (hence different) than those given:
1793 */
84822d0b 1794 if (status == nfserr_resource)
1da177e4
LT		 1795 status = nfserr_not_same;
1796 if (status)
1797 goto out_kfree;
1798
95ec28cd
BH		 1799 /* skip bitmap */
1800 p = buf + 1 + ntohl(buf[0]);
1da177e4
LT		 1801 status = nfserr_not_same;
1802 if (ntohl(*p++) != verify->ve_attrlen)
1803 goto out_kfree;
1804 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen))
1805 status = nfserr_same;
1806
1807out_kfree:
1808 kfree(buf);
1809 return status;
1810}
1811
c954e2a5
BF		 1812static __be32
1813nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1814 union nfsd4_op_u *u)
c954e2a5
BF		 1815{
1816 __be32 status;
1817
eb69853d 1818 status = _nfsd4_verify(rqstp, cstate, &u->verify);
c954e2a5
BF		 1819 return status == nfserr_not_same ? nfs_ok : status;
1820}
1821
1822static __be32
1823nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
eb69853d 1824 union nfsd4_op_u *u)
c954e2a5
BF		 1825{
1826 __be32 status;
1827
eb69853d 1828 status = _nfsd4_verify(rqstp, cstate, &u->nverify);
c954e2a5
BF		 1829 return status == nfserr_same ? nfs_ok : status;
1830}
1831
9cf514cc
CH		 1832#ifdef CONFIG_NFSD_PNFS
1833static const struct nfsd4_layout_ops *
1834nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type)
1835{
8a4c3926 1836 if (!exp->ex_layout_types) {
9cf514cc
CH		 1837 dprintk("%s: export does not support pNFS\n", __func__);
1838 return NULL;
1839 }
1840
b550a32e
AK		 1841 if (layout_type >= LAYOUT_TYPE_MAX ||
1842 !(exp->ex_layout_types & (1 << layout_type))) {
9cf514cc
CH		 1843 dprintk("%s: layout type %d not supported\n",
1844 __func__, layout_type);
1845 return NULL;
1846 }
1847
1848 return nfsd4_layout_ops[layout_type];
1849}
1850
1851static __be32
1852nfsd4_getdeviceinfo(struct svc_rqst *rqstp,
eb69853d 1853 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1854{
eb69853d 1855 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo;
9cf514cc
CH		 1856 const struct nfsd4_layout_ops *ops;
1857 struct nfsd4_deviceid_map *map;
1858 struct svc_export *exp;
1859 __be32 nfserr;
1860
1861 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n",
1862 __func__,
1863 gdp->gd_layout_type,
1864 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation,
1865 gdp->gd_maxcount);
1866
1867 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx);
1868 if (!map) {
1869 dprintk("%s: couldn't find device ID to export mapping!\n",
1870 __func__);
1871 return nfserr_noent;
1872 }
1873
1874 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid);
1875 if (IS_ERR(exp)) {
1876 dprintk("%s: could not find device id\n", __func__);
1877 return nfserr_noent;
1878 }
1879
1880 nfserr = nfserr_layoutunavailable;
1881 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type);
1882 if (!ops)
1883 goto out;
1884
1885 nfserr = nfs_ok;
f99d4fbd
CH		 1886 if (gdp->gd_maxcount != 0) {
1887 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb,
d7c920d1 1888 rqstp, cstate->session->se_client, gdp);
f99d4fbd 1889 }
9cf514cc
CH		 1890
1891 gdp->gd_notify_types &= ops->notify_types;
9cf514cc 1892out:
a1420384 1893 exp_put(exp);
9cf514cc
CH		 1894 return nfserr;
1895}
1896
34b1744c
BF		 1897static void
1898nfsd4_getdeviceinfo_release(union nfsd4_op_u *u)
1899{
1900 kfree(u->getdeviceinfo.gd_device);
1901}
1902
9cf514cc
CH		 1903static __be32
1904nfsd4_layoutget(struct svc_rqst *rqstp,
eb69853d 1905 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1906{
eb69853d 1907 struct nfsd4_layoutget *lgp = &u->layoutget;
9cf514cc
CH		 1908 struct svc_fh *current_fh = &cstate->current_fh;
1909 const struct nfsd4_layout_ops *ops;
1910 struct nfs4_layout_stateid *ls;
1911 __be32 nfserr;
66282ec1 1912 int accmode = NFSD_MAY_READ_IF_EXEC;
9cf514cc
CH		 1913
1914 switch (lgp->lg_seg.iomode) {
1915 case IOMODE_READ:
66282ec1 1916 accmode |= NFSD_MAY_READ;
9cf514cc
CH		 1917 break;
1918 case IOMODE_RW:
66282ec1 1919 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE;
9cf514cc
CH		 1920 break;
1921 default:
1922 dprintk("%s: invalid iomode %d\n",
1923 __func__, lgp->lg_seg.iomode);
1924 nfserr = nfserr_badiomode;
1925 goto out;
1926 }
1927
1928 nfserr = fh_verify(rqstp, current_fh, 0, accmode);
1929 if (nfserr)
1930 goto out;
1931
1932 nfserr = nfserr_layoutunavailable;
1933 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type);
1934 if (!ops)
1935 goto out;
1936
1937 /*
1938 * Verify minlength and range as per RFC5661:
1939 * o If loga_length is less than loga_minlength,
1940 * the metadata server MUST return NFS4ERR_INVAL.
1941 * o If the sum of loga_offset and loga_minlength exceeds
1942 * NFS4_UINT64_MAX, and loga_minlength is not
1943 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result.
1944 * o If the sum of loga_offset and loga_length exceeds
1945 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX,
1946 * the error NFS4ERR_INVAL MUST result.
1947 */
1948 nfserr = nfserr_inval;
1949 if (lgp->lg_seg.length < lgp->lg_minlength ||
1950 (lgp->lg_minlength != NFS4_MAX_UINT64 &&
1951 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) ||
1952 (lgp->lg_seg.length != NFS4_MAX_UINT64 &&
1953 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset))
1954 goto out;
1955 if (lgp->lg_seg.length == 0)
1956 goto out;
1957
1958 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
1959 true, lgp->lg_layout_type, &ls);
31ef83dc 1960 if (nfserr) {
f394b62b 1961 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid);
9cf514cc 1962 goto out;
31ef83dc 1963 }
9cf514cc 1964
c5c707f9
CH		 1965 nfserr = nfserr_recallconflict;
1966 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
1967 goto out_put_stid;
1968
2b0143b5 1969 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry),
9cf514cc
CH		 1970 current_fh, lgp);
1971 if (nfserr)
1972 goto out_put_stid;
1973
1974 nfserr = nfsd4_insert_layout(lgp, ls);
1975
1976out_put_stid:
cc8a5532 1977 mutex_unlock(&ls->ls_mutex);
9cf514cc
CH		 1978 nfs4_put_stid(&ls->ls_stid);
1979out:
1980 return nfserr;
1981}
1982
34b1744c
BF		 1983static void
1984nfsd4_layoutget_release(union nfsd4_op_u *u)
1985{
1986 kfree(u->layoutget.lg_content);
1987}
1988
9cf514cc
CH		 1989static __be32
1990nfsd4_layoutcommit(struct svc_rqst *rqstp,
eb69853d 1991 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 1992{
eb69853d 1993 struct nfsd4_layoutcommit *lcp = &u->layoutcommit;
9cf514cc
CH		 1994 const struct nfsd4_layout_seg *seg = &lcp->lc_seg;
1995 struct svc_fh *current_fh = &cstate->current_fh;
1996 const struct nfsd4_layout_ops *ops;
1997 loff_t new_size = lcp->lc_last_wr + 1;
1998 struct inode *inode;
1999 struct nfs4_layout_stateid *ls;
2000 __be32 nfserr;
2001
2002 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE);
2003 if (nfserr)
2004 goto out;
2005
2006 nfserr = nfserr_layoutunavailable;
2007 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type);
2008 if (!ops)
2009 goto out;
2b0143b5 2010 inode = d_inode(current_fh->fh_dentry);
9cf514cc
CH		 2011
2012 nfserr = nfserr_inval;
2013 if (new_size <= seg->offset) {
2014 dprintk("pnfsd: last write before layout segment\n");
2015 goto out;
2016 }
2017 if (new_size > seg->offset + seg->length) {
2018 dprintk("pnfsd: last write beyond layout segment\n");
2019 goto out;
2020 }
2021 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) {
2022 dprintk("pnfsd: layoutcommit beyond EOF\n");
2023 goto out;
2024 }
2025
2026 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid,
2027 false, lcp->lc_layout_type,
2028 &ls);
2029 if (nfserr) {
f394b62b 2030 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid);
9cf514cc
CH		 2031 /* fixup error code as per RFC5661 */
2032 if (nfserr == nfserr_bad_stateid)
2033 nfserr = nfserr_badlayout;
2034 goto out;
2035 }
2036
cc8a5532
JL		 2037 /* LAYOUTCOMMIT does not require any serialization */
2038 mutex_unlock(&ls->ls_mutex);
2039
9cf514cc
CH		 2040 if (new_size > i_size_read(inode)) {
2041 lcp->lc_size_chg = 1;
2042 lcp->lc_newsize = new_size;
2043 } else {
2044 lcp->lc_size_chg = 0;
2045 }
2046
d8398fc1 2047 nfserr = ops->proc_layoutcommit(inode, lcp);
9cf514cc
CH		 2048 nfs4_put_stid(&ls->ls_stid);
2049out:
2050 return nfserr;
2051}
2052
2053static __be32
2054nfsd4_layoutreturn(struct svc_rqst *rqstp,
eb69853d 2055 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u)
9cf514cc 2056{
eb69853d 2057 struct nfsd4_layoutreturn *lrp = &u->layoutreturn;
9cf514cc
CH		 2058 struct svc_fh *current_fh = &cstate->current_fh;
2059 __be32 nfserr;
2060
2061 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP);
2062 if (nfserr)
2063 goto out;
2064
2065 nfserr = nfserr_layoutunavailable;
2066 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type))
2067 goto out;
2068
2069 switch (lrp->lr_seg.iomode) {
2070 case IOMODE_READ:
2071 case IOMODE_RW:
2072 case IOMODE_ANY:
2073 break;
2074 default:
2075 dprintk("%s: invalid iomode %d\n", __func__,
2076 lrp->lr_seg.iomode);
2077 nfserr = nfserr_inval;
2078 goto out;
2079 }
2080
2081 switch (lrp->lr_return_type) {
2082 case RETURN_FILE:
2083 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp);
2084 break;
2085 case RETURN_FSID:
2086 case RETURN_ALL:
2087 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp);
2088 break;
2089 default:
2090 dprintk("%s: invalid return_type %d\n", __func__,
2091 lrp->lr_return_type);
2092 nfserr = nfserr_inval;
2093 break;
2094 }
2095out:
2096 return nfserr;
2097}
2098#endif /* CONFIG_NFSD_PNFS */
2099
23e50fe3
FL		 2100static __be32
2101nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2102 union nfsd4_op_u *u)
2103{
2104 struct nfsd4_getxattr *getxattr = &u->getxattr;
2105
2106 return nfsd_getxattr(rqstp, &cstate->current_fh,
2107 getxattr->getxa_name, &getxattr->getxa_buf,
2108 &getxattr->getxa_len);
2109}
2110
2111static __be32
2112nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2113 union nfsd4_op_u *u)
2114{
2115 struct nfsd4_setxattr *setxattr = &u->setxattr;
2116 __be32 ret;
2117
2118 if (opens_in_grace(SVC_NET(rqstp)))
2119 return nfserr_grace;
2120
2121 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name,
2122 setxattr->setxa_buf, setxattr->setxa_len,
2123 setxattr->setxa_flags);
2124
2125 if (!ret)
2126 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh);
2127
2128 return ret;
2129}
2130
2131static __be32
2132nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2133 union nfsd4_op_u *u)
2134{
2135 /*
2136 * Get the entire list, then copy out only the user attributes
2137 * in the encode function.
2138 */
2139 return nfsd_listxattr(rqstp, &cstate->current_fh,
2140 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len);
2141}
2142
2143static __be32
2144nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
2145 union nfsd4_op_u *u)
2146{
2147 struct nfsd4_removexattr *removexattr = &u->removexattr;
2148 __be32 ret;
2149
2150 if (opens_in_grace(SVC_NET(rqstp)))
2151 return nfserr_grace;
2152
2153 ret = nfsd_removexattr(rqstp, &cstate->current_fh,
2154 removexattr->rmxa_name);
2155
2156 if (!ret)
2157 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh);
2158
2159 return ret;
2160}
2161
1da177e4
LT		 2162/*
2163 * NULL call.
2164 */
7111c66e 2165static __be32
a6beb732 2166nfsd4_proc_null(struct svc_rqst *rqstp)
1da177e4
LT		 2167{
2168 return nfs_ok;
2169}
2170
e2b20950
SA		 2171static inline void nfsd4_increment_op_stats(u32 opnum)
2172{
2173 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP)
2174 nfsdstats.nfs4_opcount[opnum]++;
2175}
2176
bb2a8b0c 2177static const struct nfsd4_operation nfsd4_ops[];
b591480b 2178
f1c7f79b 2179static const char *nfsd4_op_name(unsigned opnum);
b001a1b6 2180
f9bb94c4 2181/*
57716355 2182 * Enforce NFSv4.1 COMPOUND ordering rules:
f9bb94c4 2183 *
57716355
BF		 2184 * Also note, enforced elsewhere:
2185 * - SEQUENCE other than as first op results in
2186 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().)
1d1bc8f2
BF		 2187 * - BIND_CONN_TO_SESSION must be the only op in its compound.
2188 * (Enforced in nfsd4_bind_conn_to_session().)
57716355
BF		 2189 * - DESTROY_SESSION must be the final operation in a compound, if
2190 * sessionid's in SEQUENCE and DESTROY_SESSION are the same.
2191 * (Enforced in nfsd4_destroy_session().)
f9bb94c4 2192 */
57716355 2193static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args)
f9bb94c4 2194{
7a04cfda 2195 struct nfsd4_op *first_op = &args->ops[0];
57716355
BF		 2196
2197 /* These ordering requirements don't apply to NFSv4.0: */
2198 if (args->minorversion == 0)
2199 return nfs_ok;
2200 /* This is weird, but OK, not our problem: */
2201 if (args->opcnt == 0)
2202 return nfs_ok;
7a04cfda 2203 if (first_op->status == nfserr_op_illegal)
57716355 2204 return nfs_ok;
7a04cfda 2205 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP))
57716355 2206 return nfserr_op_not_in_session;
7a04cfda 2207 if (first_op->opnum == OP_SEQUENCE)
57716355 2208 return nfs_ok;
7a04cfda
BF		 2209 /*
2210 * So first_op is something allowed outside a session, like
2211 * EXCHANGE_ID; but then it has to be the only op in the
2212 * compound:
2213 */
57716355
BF		 2214 if (args->opcnt != 1)
2215 return nfserr_not_only_op;
2216 return nfs_ok;
f9bb94c4
AA		 2217}
2218
f4f9ef4a 2219const struct nfsd4_operation *OPDESC(struct nfsd4_op *op)
22b03214
BF		 2220{
2221 return &nfsd4_ops[op->opnum];
2222}
2223
1091006c
BF		 2224bool nfsd4_cache_this_op(struct nfsd4_op *op)
2225{
e372ba60
BF		 2226 if (op->opnum == OP_ILLEGAL)
2227 return false;
c856694e 2228 return OPDESC(op)->op_flags & OP_CACHEME;
1091006c
BF		 2229}
2230
68d93184
BF		 2231static bool need_wrongsec_check(struct svc_rqst *rqstp)
2232{
2233 struct nfsd4_compoundres *resp = rqstp->rq_resp;
2234 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
2235 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
2236 struct nfsd4_op *next = &argp->ops[resp->opcnt];
bb2a8b0c
CH		 2237 const struct nfsd4_operation *thisd = OPDESC(this);
2238 const struct nfsd4_operation *nextd;
68d93184 2239
68d93184
BF		 2240 /*
2241 * Most ops check wronsec on our own; only the putfh-like ops
2242 * have special rules.
2243 */
2244 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE))
2245 return false;
2246 /*
2247 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a
2248 * put-filehandle operation if we're not going to use the
2249 * result:
2250 */
2251 if (argp->opcnt == resp->opcnt)
2252 return false;
51904b08
BF		 2253 if (next->opnum == OP_ILLEGAL)
2254 return false;
68d93184
BF		 2255 nextd = OPDESC(next);
2256 /*
2257 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC
2258 * errors themselves as necessary; others should check for them
2259 * now:
2260 */
2261 return !(nextd->op_flags & OP_HANDLES_WRONGSEC);
2262}
2263
2d124dfa
BF		 2264static void svcxdr_init_encode(struct svc_rqst *rqstp,
2265 struct nfsd4_compoundres *resp)
2266{
2267 struct xdr_stream *xdr = &resp->xdr;
2268 struct xdr_buf *buf = &rqstp->rq_res;
2269 struct kvec *head = buf->head;
2270
2271 xdr->buf = buf;
ddd1ea56 2272 xdr->iov = head;
2d124dfa 2273 xdr->p = head->iov_base + head->iov_len;
a5cddc88 2274 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack;
6ac90391
BF		 2275 /* Tail and page_len should be zero at this point: */
2276 buf->len = buf->head[0].iov_len;
2825a7f9 2277 xdr->scratch.iov_len = 0;
05638dc7 2278 xdr->page_ptr = buf->pages - 1;
2825a7f9 2279 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages)
a5cddc88 2280 - rqstp->rq_auth_slack;
2d124dfa
BF		 2281}
2282
b9e8638e
OK		 2283#ifdef CONFIG_NFSD_V4_2_INTER_SSC
2284static void
2285check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2286{
2287 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL;
2288 struct nfsd4_copy *copy;
2289 struct nfsd4_putfh *putfh;
2290 int i;
2291
2292 /* traverse all operation and if it's a COPY compound, mark the
2293 * source filehandle to skip verification
2294 */
2295 for (i = 0; i < args->opcnt; i++) {
2296 op = &args->ops[i];
2297 if (op->opnum == OP_PUTFH)
2298 current_op = op;
2299 else if (op->opnum == OP_SAVEFH)
2300 saved_op = current_op;
2301 else if (op->opnum == OP_RESTOREFH)
2302 current_op = saved_op;
2303 else if (op->opnum == OP_COPY) {
2304 copy = (struct nfsd4_copy *)&op->u;
2305 if (!saved_op) {
2306 op->status = nfserr_nofilehandle;
2307 return;
2308 }
2309 putfh = (struct nfsd4_putfh *)&saved_op->u;
2310 if (!copy->cp_intra)
2311 putfh->no_verify = true;
2312 }
2313 }
2314}
2315#else
2316static void
2317check_if_stalefh_allowed(struct nfsd4_compoundargs *args)
2318{
2319}
2320#endif
2321
1da177e4
LT		 2322/*
2323 * COMPOUND call.
2324 */
7111c66e 2325static __be32
a6beb732 2326nfsd4_proc_compound(struct svc_rqst *rqstp)
1da177e4 2327{
a6beb732
CH		 2328 struct nfsd4_compoundargs *args = rqstp->rq_argp;
2329 struct nfsd4_compoundres *resp = rqstp->rq_resp;
1da177e4 2330 struct nfsd4_op *op;
e354d571 2331 struct nfsd4_compound_state *cstate = &resp->cstate;
4daeed25
KM		 2332 struct svc_fh *current_fh = &cstate->current_fh;
2333 struct svc_fh *save_fh = &cstate->save_fh;
e333f3bb 2334 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
b37ad28b 2335 __be32 status;
1da177e4 2336
2d124dfa 2337 svcxdr_init_encode(rqstp, resp);
4aea24b2 2338 resp->tagp = resp->xdr.p;
1da177e4 2339 /* reserve space for: taglen, tag, and opcnt */
d3f627c8 2340 xdr_reserve_space(&resp->xdr, 8 + args->taglen);
1da177e4
LT		 2341 resp->taglen = args->taglen;
2342 resp->tag = args->tag;
1da177e4 2343 resp->rqstp = rqstp;
4daeed25 2344 cstate->minorversion = args->minorversion;
4daeed25
KM		 2345 fh_init(current_fh, NFS4_FHSIZE);
2346 fh_init(save_fh, NFS4_FHSIZE);
8ff30fa4
N		 2347 /*
2348 * Don't use the deferral mechanism for NFSv4; compounds make it
2349 * too hard to avoid non-idempotency problems.
2350 */
30660e04 2351 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
1da177e4
LT		 2352
2353 /*
2354 * According to RFC3010, this takes precedence over all other errors.
2355 */
2356 status = nfserr_minor_vers_mismatch;
e333f3bb 2357 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
1da177e4 2358 goto out;
0078117c
BF		 2359 status = nfserr_resource;
2360 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
2361 goto out;
1da177e4 2362
57716355
BF		 2363 status = nfs41_check_op_ordering(args);
2364 if (status) {
f9bb94c4 2365 op = &args->ops[0];
57716355 2366 op->status = status;
5b7b15ae 2367 resp->opcnt = 1;
f9bb94c4
AA		 2368 goto encode_op;
2369 }
b9e8638e 2370 check_if_stalefh_allowed(args);
f9bb94c4 2371
28df3d15
BF		 2372 rqstp->rq_lease_breaker = (void **)&cstate->clp;
2373
fff4080b 2374 trace_nfsd_compound(rqstp, args->opcnt);
1da177e4
LT		 2375 while (!status && resp->opcnt < args->opcnt) {
2376 op = &args->ops[resp->opcnt++];
2377
2378 /*
2379 * The XDR decode routines may have pre-set op->status;
2380 * for example, if there is a miscellaneous XDR error
2381 * it will be set to nfserr_bad_xdr.
2382 */
9d313b17
BF		 2383 if (op->status) {
2384 if (op->opnum == OP_OPEN)
2385 op->status = nfsd4_open_omfg(rqstp, cstate, op);
1da177e4 2386 goto encode_op;
9d313b17 2387 }
b9e8638e
OK		 2388 if (!current_fh->fh_dentry &&
2389 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) {
f4f9ef4a 2390 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) {
42ca0993
BF		 2391 op->status = nfserr_nofilehandle;
2392 goto encode_op;
2393 }
b9e8638e
OK		 2394 } else if (current_fh->fh_export &&
2395 current_fh->fh_export->ex_fslocs.migrated &&
f4f9ef4a 2396 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) {
42ca0993 2397 op->status = nfserr_moved;
1da177e4
LT		 2398 goto encode_op;
2399 }
b591480b 2400
2336745e
KM		 2401 fh_clear_wcc(current_fh);
2402
58e7b33a 2403 /* If op is non-idempotent */
f4f9ef4a 2404 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) {
4c69d585 2405 /*
a8095f7e
BF		 2406 * Don't execute this op if we couldn't encode a
2407 * succesful reply:
2408 */
f4f9ef4a 2409 u32 plen = op->opdesc->op_rsize_bop(rqstp, op);
a8095f7e
BF		 2410 /*
2411 * Plus if there's another operation, make sure
4c69d585
BF		 2412 * we'll have space to at least encode an error:
2413 */
2414 if (resp->opcnt < args->opcnt)
2415 plen += COMPOUND_ERR_SLACK_SPACE;
58e7b33a
MJ		 2416 op->status = nfsd4_check_resp_size(resp, plen);
2417 }
2418
2419 if (op->status)
2420 goto encode_op;
2421
f4f9ef4a
BF		 2422 if (op->opdesc->op_get_currentstateid)
2423 op->opdesc->op_get_currentstateid(cstate, &op->u);
2424 op->status = op->opdesc->op_func(rqstp, cstate, &op->u);
1da177e4 2425
9a307403
BF		 2426 /* Only from SEQUENCE */
2427 if (cstate->status == nfserr_replay_cache) {
2428 dprintk("%s NFS4.1 replay from cache\n", __func__);
2429 status = op->status;
2430 goto out;
2431 }
8b70484c 2432 if (!op->status) {
f4f9ef4a
BF		 2433 if (op->opdesc->op_set_currentstateid)
2434 op->opdesc->op_set_currentstateid(cstate, &op->u);
8b70484c 2435
f4f9ef4a 2436 if (op->opdesc->op_flags & OP_CLEAR_STATEID)
37c593c5 2437 clear_current_stateid(cstate);
8b70484c 2438
d781e3df
BF		 2439 if (current_fh->fh_export &&
2440 need_wrongsec_check(rqstp))
4daeed25 2441 op->status = check_nfsd_access(current_fh->fh_export, rqstp);
8b70484c 2442 }
1da177e4 2443encode_op:
a90b061c 2444 if (op->status == nfserr_replay_me) {
a4f1706a 2445 op->replay = &cstate->replay_owner->so_replay;
d0a381dd 2446 nfsd4_encode_replay(&resp->xdr, op);
1da177e4
LT		 2447 status = op->status = op->replay->rp_status;
2448 } else {
2449 nfsd4_encode_operation(resp, op);
2450 status = op->status;
2451 }
0407717d 2452
fff4080b
CL		 2453 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status,
2454 nfsd4_op_name(op->opnum));
0407717d 2455
58fb12e6 2456 nfsd4_cstate_clear_replay(cstate);
e2b20950 2457 nfsd4_increment_op_stats(op->opnum);
1da177e4
LT		 2458 }
2459
4daeed25
KM		 2460 cstate->status = status;
2461 fh_put(current_fh);
2462 fh_put(save_fh);
2463 BUG_ON(cstate->replay_owner);
1da177e4 2464out:
2f425878 2465 /* Reset deferral mechanism for RPC deferrals */
30660e04 2466 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags);
3b12cd98 2467 dprintk("nfsv4 compound returned %d\n", ntohl(status));
1da177e4
LT		 2468 return status;
2469}
2470
58e7b33a
MJ		 2471#define op_encode_hdr_size (2)
2472#define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE))
2473#define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE))
2474#define op_encode_change_info_maxsz (5)
2475#define nfs4_fattr_bitmap_maxsz (4)
2476
8c7424cf
BF		 2477/* We'll fall back on returning no lockowner if run out of space: */
2478#define op_encode_lockowner_maxsz (0)
58e7b33a
MJ		 2479#define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz)
2480
2481#define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ))
2482
2483#define op_encode_ace_maxsz (3 + nfs4_owner_maxsz)
2484#define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \
2485 op_encode_ace_maxsz)
2486
2487#define op_encode_channel_attrs_maxsz (6 + 1 + 1)
2488
2489static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2490{
2491 return (op_encode_hdr_size) * sizeof(__be32);
2492}
2493
2494static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2495{
2496 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32);
2497}
2498
2282cd2c
KM		 2499static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2500{
2501 /* ac_supported, ac_resp_access */
2502 return (op_encode_hdr_size + 2)* sizeof(__be32);
2503}
2504
58e7b33a
MJ		 2505static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2506{
2507 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32);
2508}
2509
2510static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2511{
2512 return (op_encode_hdr_size + op_encode_change_info_maxsz
2513 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2514}
2515
b86cef60
BF		 2516/*
2517 * Note since this is an idempotent operation we won't insist on failing
2518 * the op prematurely if the estimate is too large. We may turn off splice
2519 * reads unnecessarily.
2520 */
2521static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp,
2522 struct nfsd4_op *op)
2523{
2524 u32 *bmap = op->u.getattr.ga_bmval;
2525 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2];
2526 u32 ret = 0;
2527
2528 if (bmap0 & FATTR4_WORD0_ACL)
2529 return svc_max_payload(rqstp);
2530 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS)
2531 return svc_max_payload(rqstp);
2532
2533 if (bmap1 & FATTR4_WORD1_OWNER) {
2534 ret += IDMAP_NAMESZ + 4;
2535 bmap1 &= ~FATTR4_WORD1_OWNER;
2536 }
2537 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) {
2538 ret += IDMAP_NAMESZ + 4;
2539 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP;
2540 }
2541 if (bmap0 & FATTR4_WORD0_FILEHANDLE) {
2542 ret += NFS4_FHSIZE + 4;
2543 bmap0 &= ~FATTR4_WORD0_FILEHANDLE;
2544 }
2545 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) {
1ec8c0c4 2546 ret += NFS4_MAXLABELLEN + 12;
b86cef60
BF		 2547 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL;
2548 }
2549 /*
2550 * Largest of remaining attributes are 16 bytes (e.g.,
2551 * supported_attributes)
2552 */
2553 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2));
2554 /* bitmask, length */
2555 ret += 20;
2556 return ret;
2557}
2558
2282cd2c
KM		 2559static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2560{
2561 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE;
2562}
2563
58e7b33a
MJ		 2564static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2565{
2566 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2567 * sizeof(__be32);
2568}
2569
2570static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2571{
2572 return (op_encode_hdr_size + op_encode_lock_denied_maxsz)
2573 * sizeof(__be32);
2574}
2575
2576static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2577{
2578 return (op_encode_hdr_size + op_encode_stateid_maxsz
2579 + op_encode_change_info_maxsz + 1
2580 + nfs4_fattr_bitmap_maxsz
2581 + op_encode_delegation_maxsz) * sizeof(__be32);
2582}
2583
2584static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2585{
2586 u32 maxcount = 0, rlen = 0;
2587
2588 maxcount = svc_max_payload(rqstp);
3c7aa15d 2589 rlen = min(op->u.read.rd_length, maxcount);
58e7b33a 2590
622f560e 2591 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2592}
2593
2594static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2595{
3c7aa15d 2596 u32 maxcount = 0, rlen = 0;
58e7b33a 2597
3c7aa15d
KM		 2598 maxcount = svc_max_payload(rqstp);
2599 rlen = min(op->u.readdir.rd_maxcount, maxcount);
58e7b33a 2600
561f0ed4
BF		 2601 return (op_encode_hdr_size + op_encode_verifier_maxsz +
2602 XDR_QUADLEN(rlen)) * sizeof(__be32);
58e7b33a
MJ		 2603}
2604
2282cd2c
KM		 2605static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2606{
2607 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE;
2608}
2609
58e7b33a
MJ		 2610static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2611{
2612 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2613 * sizeof(__be32);
2614}
2615
2616static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2617{
2618 return (op_encode_hdr_size + op_encode_change_info_maxsz
2619 + op_encode_change_info_maxsz) * sizeof(__be32);
2620}
2621
ccae70a9
BF		 2622static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp,
2623 struct nfsd4_op *op)
2624{
d1d84c96
BF		 2625 return (op_encode_hdr_size
2626 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32);
ccae70a9
BF		 2627}
2628
2282cd2c
KM		 2629static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2630{
2631 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids)
2632 * sizeof(__be32);
2633}
2634
58e7b33a
MJ		 2635static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2636{
2637 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32);
2638}
2639
2282cd2c
KM		 2640static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2641{
2642 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR *
2643 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32);
2644}
2645
58e7b33a
MJ		 2646static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2647{
480efaee
BF		 2648 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) *
2649 sizeof(__be32);
58e7b33a
MJ		 2650}
2651
2652static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2653{
f34e432b 2654 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32);
58e7b33a
MJ		 2655}
2656
2657static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2658{
2659 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\
a8bb84bc
KM		 2660 1 + 1 + /* eir_flags, spr_how */\
2661 4 + /* spo_must_enforce & _allow with bitmap */\
58e7b33a
MJ		 2662 2 + /*eir_server_owner.so_minor_id */\
2663 /* eir_server_owner.so_major_id<> */\
2664 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2665 /* eir_server_scope<> */\
2666 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\
2667 1 + /* eir_server_impl_id array length */\
2668 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32);
2669}
2670
2671static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2672{
2673 return (op_encode_hdr_size + \
2674 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\
2675 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32);
2676}
2677
2678static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2679{
2680 return (op_encode_hdr_size + \
2681 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\
2682 2 + /* csr_sequence, csr_flags */\
2683 op_encode_channel_attrs_maxsz + \
2684 op_encode_channel_attrs_maxsz) * sizeof(__be32);
2685}
2686
29ae7f9d
AS		 2687static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2688{
2689 return (op_encode_hdr_size +
2690 1 /* wr_callback */ +
2691 op_encode_stateid_maxsz /* wr_callback */ +
2692 2 /* wr_count */ +
2693 1 /* wr_committed */ +
2694 op_encode_verifier_maxsz +
2695 1 /* cr_consecutive */ +
2696 1 /* cr_synchronous */) * sizeof(__be32);
2697}
2698
6308bc98
OK		 2699static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp,
2700 struct nfsd4_op *op)
2701{
2702 return (op_encode_hdr_size +
2703 2 /* osr_count */ +
2704 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32);
2705}
2706
51911868
OK		 2707static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp,
2708 struct nfsd4_op *op)
2709{
2710 return (op_encode_hdr_size +
2711 3 /* cnr_lease_time */ +
2712 1 /* We support one cnr_source_server */ +
2713 1 /* cnr_stateid seq */ +
2714 op_encode_stateid_maxsz /* cnr_stateid */ +
2715 1 /* num cnr_source_server*/ +
2716 1 /* nl4_type */ +
2717 1 /* nl4 size */ +
2718 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */)
2719 * sizeof(__be32);
2720}
2721
9cf514cc 2722#ifdef CONFIG_NFSD_PNFS
2282cd2c
KM		 2723static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2724{
2725 u32 maxcount = 0, rlen = 0;
2726
2727 maxcount = svc_max_payload(rqstp);
2728 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount);
2729
2730 return (op_encode_hdr_size +
2731 1 /* gd_layout_type*/ +
2732 XDR_QUADLEN(rlen) +
2733 2 /* gd_notify_types */) * sizeof(__be32);
2734}
2735
9cf514cc
CH		 2736/*
2737 * At this stage we don't really know what layout driver will handle the request,
2738 * so we need to define an arbitrary upper bound here.
2739 */
2740#define MAX_LAYOUT_SIZE 128
2741static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2742{
2743 return (op_encode_hdr_size +
2744 1 /* logr_return_on_close */ +
2745 op_encode_stateid_maxsz +
2746 1 /* nr of layouts */ +
2747 MAX_LAYOUT_SIZE) * sizeof(__be32);
2748}
2749
2750static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2751{
2752 return (op_encode_hdr_size +
2753 1 /* locr_newsize */ +
2754 2 /* ns_size */) * sizeof(__be32);
2755}
2756
2757static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2758{
2759 return (op_encode_hdr_size +
2760 1 /* lrs_stateid */ +
2761 op_encode_stateid_maxsz) * sizeof(__be32);
2762}
2763#endif /* CONFIG_NFSD_PNFS */
2764
2282cd2c
KM		 2765
2766static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op)
2767{
2768 return (op_encode_hdr_size + 3) * sizeof(__be32);
2769}
2770
23e50fe3
FL		 2771static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp,
2772 struct nfsd4_op *op)
2773{
2774 u32 maxcount, rlen;
2775
2776 maxcount = svc_max_payload(rqstp);
2777 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount);
2778
2779 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2780}
2781
2782static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp,
2783 struct nfsd4_op *op)
2784{
2785 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2786 * sizeof(__be32);
2787}
2788static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp,
2789 struct nfsd4_op *op)
2790{
2791 u32 maxcount, rlen;
2792
2793 maxcount = svc_max_payload(rqstp);
2794 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount);
2795
2796 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32);
2797}
2798
2799static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp,
2800 struct nfsd4_op *op)
2801{
2802 return (op_encode_hdr_size + op_encode_change_info_maxsz)
2803 * sizeof(__be32);
2804}
2805
2806
bb2a8b0c 2807static const struct nfsd4_operation nfsd4_ops[] = {
b591480b 2808 [OP_ACCESS] = {
eb69853d 2809 .op_func = nfsd4_access,
b001a1b6 2810 .op_name = "OP_ACCESS",
1c122638 2811 .op_rsize_bop = nfsd4_access_rsize,
b591480b
BF		 2812 },
2813 [OP_CLOSE] = {
eb69853d 2814 .op_func = nfsd4_close,
58e7b33a 2815 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2816 .op_name = "OP_CLOSE",
1c122638 2817 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2818 .op_get_currentstateid = nfsd4_get_closestateid,
b60e9859 2819 .op_set_currentstateid = nfsd4_set_closestateid,
b591480b
BF		 2820 },
2821 [OP_COMMIT] = {
eb69853d 2822 .op_func = nfsd4_commit,
58e7b33a 2823 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2824 .op_name = "OP_COMMIT",
1c122638 2825 .op_rsize_bop = nfsd4_commit_rsize,
b591480b
BF		 2826 },
2827 [OP_CREATE] = {
eb69853d 2828 .op_func = nfsd4_create,
d1471053 2829 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID,
b001a1b6 2830 .op_name = "OP_CREATE",
1c122638 2831 .op_rsize_bop = nfsd4_create_rsize,
b591480b
BF		 2832 },
2833 [OP_DELEGRETURN] = {
eb69853d 2834 .op_func = nfsd4_delegreturn,
58e7b33a 2835 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2836 .op_name = "OP_DELEGRETURN",
58e7b33a 2837 .op_rsize_bop = nfsd4_only_status_rsize,
57832e7b 2838 .op_get_currentstateid = nfsd4_get_delegreturnstateid,
b591480b
BF		 2839 },
2840 [OP_GETATTR] = {
eb69853d 2841 .op_func = nfsd4_getattr,
eeac294e 2842 .op_flags = ALLOWED_ON_ABSENT_FS,
b86cef60 2843 .op_rsize_bop = nfsd4_getattr_rsize,
b001a1b6 2844 .op_name = "OP_GETATTR",
b591480b
BF		 2845 },
2846 [OP_GETFH] = {
eb69853d 2847 .op_func = nfsd4_getfh,
b001a1b6 2848 .op_name = "OP_GETFH",
1c122638 2849 .op_rsize_bop = nfsd4_getfh_rsize,
b591480b
BF		 2850 },
2851 [OP_LINK] = {
eb69853d 2852 .op_func = nfsd4_link,
c856694e
BF		 2853 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING
2854 | OP_CACHEME,
b001a1b6 2855 .op_name = "OP_LINK",
1c122638 2856 .op_rsize_bop = nfsd4_link_rsize,
b591480b
BF		 2857 },
2858 [OP_LOCK] = {
eb69853d 2859 .op_func = nfsd4_lock,
b7571e4c
BF		 2860 .op_flags = OP_MODIFIES_SOMETHING |
2861 OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2862 .op_name = "OP_LOCK",
1c122638 2863 .op_rsize_bop = nfsd4_lock_rsize,
b60e9859 2864 .op_set_currentstateid = nfsd4_set_lockstateid,
b591480b
BF		 2865 },
2866 [OP_LOCKT] = {
eb69853d 2867 .op_func = nfsd4_lockt,
b7571e4c 2868 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 2869 .op_name = "OP_LOCKT",
1c122638 2870 .op_rsize_bop = nfsd4_lock_rsize,
b591480b
BF		 2871 },
2872 [OP_LOCKU] = {
eb69853d 2873 .op_func = nfsd4_locku,
58e7b33a 2874 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2875 .op_name = "OP_LOCKU",
1c122638 2876 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2877 .op_get_currentstateid = nfsd4_get_lockustateid,
b591480b
BF		 2878 },
2879 [OP_LOOKUP] = {
eb69853d 2880 .op_func = nfsd4_lookup,
d1471053 2881 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2882 .op_name = "OP_LOOKUP",
1c122638 2883 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2884 },
2885 [OP_LOOKUPP] = {
eb69853d 2886 .op_func = nfsd4_lookupp,
d1471053 2887 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID,
b001a1b6 2888 .op_name = "OP_LOOKUPP",
1c122638 2889 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2890 },
2891 [OP_NVERIFY] = {
eb69853d 2892 .op_func = nfsd4_nverify,
b001a1b6 2893 .op_name = "OP_NVERIFY",
1c122638 2894 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2895 },
2896 [OP_OPEN] = {
eb69853d 2897 .op_func = nfsd4_open,
58e7b33a 2898 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2899 .op_name = "OP_OPEN",
1c122638 2900 .op_rsize_bop = nfsd4_open_rsize,
b60e9859 2901 .op_set_currentstateid = nfsd4_set_openstateid,
b591480b
BF		 2902 },
2903 [OP_OPEN_CONFIRM] = {
eb69853d 2904 .op_func = nfsd4_open_confirm,
58e7b33a 2905 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2906 .op_name = "OP_OPEN_CONFIRM",
1c122638 2907 .op_rsize_bop = nfsd4_status_stateid_rsize,
b591480b
BF		 2908 },
2909 [OP_OPEN_DOWNGRADE] = {
eb69853d 2910 .op_func = nfsd4_open_downgrade,
58e7b33a 2911 .op_flags = OP_MODIFIES_SOMETHING,
b001a1b6 2912 .op_name = "OP_OPEN_DOWNGRADE",
1c122638 2913 .op_rsize_bop = nfsd4_status_stateid_rsize,
57832e7b 2914 .op_get_currentstateid = nfsd4_get_opendowngradestateid,
b60e9859 2915 .op_set_currentstateid = nfsd4_set_opendowngradestateid,
b591480b
BF		 2916 },
2917 [OP_PUTFH] = {
eb69853d 2918 .op_func = nfsd4_putfh,
68d93184 2919 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2920 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2921 .op_name = "OP_PUTFH",
1c122638 2922 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2923 },
eeac294e 2924 [OP_PUTPUBFH] = {
eb69853d 2925 .op_func = nfsd4_putrootfh,
68d93184 2926 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2927 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2928 .op_name = "OP_PUTPUBFH",
1c122638 2929 .op_rsize_bop = nfsd4_only_status_rsize,
eeac294e 2930 },
b591480b 2931 [OP_PUTROOTFH] = {
eb69853d 2932 .op_func = nfsd4_putrootfh,
68d93184 2933 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
5b648699 2934 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID,
b001a1b6 2935 .op_name = "OP_PUTROOTFH",
1c122638 2936 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2937 },
2938 [OP_READ] = {
eb69853d 2939 .op_func = nfsd4_read,
34b1744c 2940 .op_release = nfsd4_read_release,
b001a1b6 2941 .op_name = "OP_READ",
1c122638 2942 .op_rsize_bop = nfsd4_read_rsize,
57832e7b 2943 .op_get_currentstateid = nfsd4_get_readstateid,
b591480b
BF		 2944 },
2945 [OP_READDIR] = {
eb69853d 2946 .op_func = nfsd4_readdir,
b001a1b6 2947 .op_name = "OP_READDIR",
1c122638 2948 .op_rsize_bop = nfsd4_readdir_rsize,
b591480b
BF		 2949 },
2950 [OP_READLINK] = {
eb69853d 2951 .op_func = nfsd4_readlink,
b001a1b6 2952 .op_name = "OP_READLINK",
1c122638 2953 .op_rsize_bop = nfsd4_readlink_rsize,
b591480b
BF		 2954 },
2955 [OP_REMOVE] = {
eb69853d 2956 .op_func = nfsd4_remove,
c856694e 2957 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 2958 .op_name = "OP_REMOVE",
1c122638 2959 .op_rsize_bop = nfsd4_remove_rsize,
b591480b
BF		 2960 },
2961 [OP_RENAME] = {
eb69853d 2962 .op_func = nfsd4_rename,
c856694e 2963 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
58e7b33a 2964 .op_name = "OP_RENAME",
1c122638 2965 .op_rsize_bop = nfsd4_rename_rsize,
b591480b
BF		 2966 },
2967 [OP_RENEW] = {
eb69853d 2968 .op_func = nfsd4_renew,
58e7b33a
MJ		 2969 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
2970 | OP_MODIFIES_SOMETHING,
b001a1b6 2971 .op_name = "OP_RENEW",
1c122638 2972 .op_rsize_bop = nfsd4_only_status_rsize,
58e7b33a 2973
b591480b
BF		 2974 },
2975 [OP_RESTOREFH] = {
eb69853d 2976 .op_func = nfsd4_restorefh,
68d93184 2977 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
58e7b33a 2978 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING,
b001a1b6 2979 .op_name = "OP_RESTOREFH",
1c122638 2980 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 2981 },
2982 [OP_SAVEFH] = {
eb69853d 2983 .op_func = nfsd4_savefh,
58e7b33a 2984 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING,
b001a1b6 2985 .op_name = "OP_SAVEFH",
1c122638 2986 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 2987 },
dcb488a3 2988 [OP_SECINFO] = {
eb69853d 2989 .op_func = nfsd4_secinfo,
34b1744c 2990 .op_release = nfsd4_secinfo_release,
68d93184 2991 .op_flags = OP_HANDLES_WRONGSEC,
b001a1b6 2992 .op_name = "OP_SECINFO",
1c122638 2993 .op_rsize_bop = nfsd4_secinfo_rsize,
dcb488a3 2994 },
b591480b 2995 [OP_SETATTR] = {
eb69853d 2996 .op_func = nfsd4_setattr,
b001a1b6 2997 .op_name = "OP_SETATTR",
b7571e4c
BF		 2998 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME
2999 | OP_NONTRIVIAL_ERROR_ENCODE,
1c122638 3000 .op_rsize_bop = nfsd4_setattr_rsize,
57832e7b 3001 .op_get_currentstateid = nfsd4_get_setattrstateid,
b591480b
BF		 3002 },
3003 [OP_SETCLIENTID] = {
eb69853d 3004 .op_func = nfsd4_setclientid,
58e7b33a 3005 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
b7571e4c
BF		 3006 | OP_MODIFIES_SOMETHING | OP_CACHEME
3007 | OP_NONTRIVIAL_ERROR_ENCODE,
b001a1b6 3008 .op_name = "OP_SETCLIENTID",
1c122638 3009 .op_rsize_bop = nfsd4_setclientid_rsize,
b591480b
BF		 3010 },
3011 [OP_SETCLIENTID_CONFIRM] = {
eb69853d 3012 .op_func = nfsd4_setclientid_confirm,
58e7b33a 3013 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
c856694e 3014 | OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 3015 .op_name = "OP_SETCLIENTID_CONFIRM",
1c122638 3016 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 3017 },
3018 [OP_VERIFY] = {
eb69853d 3019 .op_func = nfsd4_verify,
b001a1b6 3020 .op_name = "OP_VERIFY",
1c122638 3021 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b
BF		 3022 },
3023 [OP_WRITE] = {
eb69853d 3024 .op_func = nfsd4_write,
c856694e 3025 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
b001a1b6 3026 .op_name = "OP_WRITE",
1c122638 3027 .op_rsize_bop = nfsd4_write_rsize,
57832e7b 3028 .op_get_currentstateid = nfsd4_get_writestateid,
b591480b
BF		 3029 },
3030 [OP_RELEASE_LOCKOWNER] = {
eb69853d 3031 .op_func = nfsd4_release_lockowner,
58e7b33a
MJ		 3032 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS
3033 | OP_MODIFIES_SOMETHING,
b001a1b6 3034 .op_name = "OP_RELEASE_LOCKOWNER",
1c122638 3035 .op_rsize_bop = nfsd4_only_status_rsize,
b591480b 3036 },
069b6ad4
AA		 3037
3038 /* NFSv4.1 operations */
3039 [OP_EXCHANGE_ID] = {
eb69853d 3040 .op_func = nfsd4_exchange_id,
58e7b33a
MJ		 3041 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3042 | OP_MODIFIES_SOMETHING,
069b6ad4 3043 .op_name = "OP_EXCHANGE_ID",
1c122638 3044 .op_rsize_bop = nfsd4_exchange_id_rsize,
069b6ad4 3045 },
cb73a9f4 3046 [OP_BACKCHANNEL_CTL] = {
eb69853d 3047 .op_func = nfsd4_backchannel_ctl,
cb73a9f4
BF		 3048 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
3049 .op_name = "OP_BACKCHANNEL_CTL",
1c122638 3050 .op_rsize_bop = nfsd4_only_status_rsize,
cb73a9f4 3051 },
1d1bc8f2 3052 [OP_BIND_CONN_TO_SESSION] = {
eb69853d 3053 .op_func = nfsd4_bind_conn_to_session,
58e7b33a
MJ		 3054 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3055 | OP_MODIFIES_SOMETHING,
1d1bc8f2 3056 .op_name = "OP_BIND_CONN_TO_SESSION",
1c122638 3057 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize,
1d1bc8f2 3058 },
069b6ad4 3059 [OP_CREATE_SESSION] = {
eb69853d 3060 .op_func = nfsd4_create_session,
58e7b33a
MJ		 3061 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3062 | OP_MODIFIES_SOMETHING,
069b6ad4 3063 .op_name = "OP_CREATE_SESSION",
1c122638 3064 .op_rsize_bop = nfsd4_create_session_rsize,
069b6ad4
AA		 3065 },
3066 [OP_DESTROY_SESSION] = {
eb69853d 3067 .op_func = nfsd4_destroy_session,
58e7b33a
MJ		 3068 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3069 | OP_MODIFIES_SOMETHING,
069b6ad4 3070 .op_name = "OP_DESTROY_SESSION",
1c122638 3071 .op_rsize_bop = nfsd4_only_status_rsize,
069b6ad4
AA		 3072 },
3073 [OP_SEQUENCE] = {
eb69853d 3074 .op_func = nfsd4_sequence,
f9bb94c4 3075 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP,
069b6ad4 3076 .op_name = "OP_SEQUENCE",
1c122638 3077 .op_rsize_bop = nfsd4_sequence_rsize,
069b6ad4 3078 },
094b5d74 3079 [OP_DESTROY_CLIENTID] = {
eb69853d 3080 .op_func = nfsd4_destroy_clientid,
58e7b33a
MJ		 3081 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP
3082 | OP_MODIFIES_SOMETHING,
094b5d74 3083 .op_name = "OP_DESTROY_CLIENTID",
1c122638 3084 .op_rsize_bop = nfsd4_only_status_rsize,
094b5d74 3085 },
4dc6ec00 3086 [OP_RECLAIM_COMPLETE] = {
eb69853d 3087 .op_func = nfsd4_reclaim_complete,
58e7b33a 3088 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
4dc6ec00 3089 .op_name = "OP_RECLAIM_COMPLETE",
1c122638 3090 .op_rsize_bop = nfsd4_only_status_rsize,
4dc6ec00 3091 },
04f4ad16 3092 [OP_SECINFO_NO_NAME] = {
eb69853d 3093 .op_func = nfsd4_secinfo_no_name,
ec572b9e 3094 .op_release = nfsd4_secinfo_no_name_release,
68d93184 3095 .op_flags = OP_HANDLES_WRONGSEC,
04f4ad16 3096 .op_name = "OP_SECINFO_NO_NAME",
1c122638 3097 .op_rsize_bop = nfsd4_secinfo_rsize,
04f4ad16 3098 },
17456804 3099 [OP_TEST_STATEID] = {
eb69853d 3100 .op_func = nfsd4_test_stateid,
17456804
BS		 3101 .op_flags = ALLOWED_WITHOUT_FH,
3102 .op_name = "OP_TEST_STATEID",
1c122638 3103 .op_rsize_bop = nfsd4_test_stateid_rsize,
17456804 3104 },
e1ca12df 3105 [OP_FREE_STATEID] = {
eb69853d 3106 .op_func = nfsd4_free_stateid,
58e7b33a 3107 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING,
e1ca12df 3108 .op_name = "OP_FREE_STATEID",
57832e7b 3109 .op_get_currentstateid = nfsd4_get_freestateid,
1c122638 3110 .op_rsize_bop = nfsd4_only_status_rsize,
e1ca12df 3111 },
9cf514cc
CH		 3112#ifdef CONFIG_NFSD_PNFS
3113 [OP_GETDEVICEINFO] = {
eb69853d 3114 .op_func = nfsd4_getdeviceinfo,
34b1744c 3115 .op_release = nfsd4_getdeviceinfo_release,
9cf514cc
CH		 3116 .op_flags = ALLOWED_WITHOUT_FH,
3117 .op_name = "OP_GETDEVICEINFO",
1c122638 3118 .op_rsize_bop = nfsd4_getdeviceinfo_rsize,
9cf514cc
CH		 3119 },
3120 [OP_LAYOUTGET] = {
eb69853d 3121 .op_func = nfsd4_layoutget,
34b1744c 3122 .op_release = nfsd4_layoutget_release,
9cf514cc
CH		 3123 .op_flags = OP_MODIFIES_SOMETHING,
3124 .op_name = "OP_LAYOUTGET",
1c122638 3125 .op_rsize_bop = nfsd4_layoutget_rsize,
9cf514cc
CH		 3126 },
3127 [OP_LAYOUTCOMMIT] = {
eb69853d 3128 .op_func = nfsd4_layoutcommit,
9cf514cc
CH		 3129 .op_flags = OP_MODIFIES_SOMETHING,
3130 .op_name = "OP_LAYOUTCOMMIT",
1c122638 3131 .op_rsize_bop = nfsd4_layoutcommit_rsize,
9cf514cc
CH		 3132 },
3133 [OP_LAYOUTRETURN] = {
eb69853d 3134 .op_func = nfsd4_layoutreturn,
9cf514cc
CH		 3135 .op_flags = OP_MODIFIES_SOMETHING,
3136 .op_name = "OP_LAYOUTRETURN",
1c122638 3137 .op_rsize_bop = nfsd4_layoutreturn_rsize,
9cf514cc
CH		 3138 },
3139#endif /* CONFIG_NFSD_PNFS */
24bab491
AS		 3140
3141 /* NFSv4.2 operations */
95d871f0 3142 [OP_ALLOCATE] = {
eb69853d 3143 .op_func = nfsd4_allocate,
03b31f48 3144 .op_flags = OP_MODIFIES_SOMETHING,
95d871f0 3145 .op_name = "OP_ALLOCATE",
1c122638 3146 .op_rsize_bop = nfsd4_only_status_rsize,
95d871f0 3147 },
b0cb9085 3148 [OP_DEALLOCATE] = {
eb69853d 3149 .op_func = nfsd4_deallocate,
03b31f48 3150 .op_flags = OP_MODIFIES_SOMETHING,
b0cb9085 3151 .op_name = "OP_DEALLOCATE",
1c122638 3152 .op_rsize_bop = nfsd4_only_status_rsize,
b0cb9085 3153 },
ffa0160a 3154 [OP_CLONE] = {
eb69853d 3155 .op_func = nfsd4_clone,
03b31f48 3156 .op_flags = OP_MODIFIES_SOMETHING,
ffa0160a 3157 .op_name = "OP_CLONE",
1c122638 3158 .op_rsize_bop = nfsd4_only_status_rsize,
ffa0160a 3159 },
29ae7f9d 3160 [OP_COPY] = {
eb69853d 3161 .op_func = nfsd4_copy,
03b31f48 3162 .op_flags = OP_MODIFIES_SOMETHING,
29ae7f9d 3163 .op_name = "OP_COPY",
1c122638 3164 .op_rsize_bop = nfsd4_copy_rsize,
29ae7f9d 3165 },
24bab491 3166 [OP_SEEK] = {
eb69853d 3167 .op_func = nfsd4_seek,
24bab491 3168 .op_name = "OP_SEEK",
1c122638 3169 .op_rsize_bop = nfsd4_seek_rsize,
24bab491 3170 },
6308bc98
OK		 3171 [OP_OFFLOAD_STATUS] = {
3172 .op_func = nfsd4_offload_status,
3173 .op_name = "OP_OFFLOAD_STATUS",
3174 .op_rsize_bop = nfsd4_offload_status_rsize,
3175 },
885e2bf3
OK		 3176 [OP_OFFLOAD_CANCEL] = {
3177 .op_func = nfsd4_offload_cancel,
3178 .op_flags = OP_MODIFIES_SOMETHING,
3179 .op_name = "OP_OFFLOAD_CANCEL",
3180 .op_rsize_bop = nfsd4_only_status_rsize,
3181 },
51911868
OK		 3182 [OP_COPY_NOTIFY] = {
3183 .op_func = nfsd4_copy_notify,
3184 .op_flags = OP_MODIFIES_SOMETHING,
3185 .op_name = "OP_COPY_NOTIFY",
3186 .op_rsize_bop = nfsd4_copy_notify_rsize,
3187 },
23e50fe3
FL		 3188 [OP_GETXATTR] = {
3189 .op_func = nfsd4_getxattr,
3190 .op_name = "OP_GETXATTR",
3191 .op_rsize_bop = nfsd4_getxattr_rsize,
3192 },
3193 [OP_SETXATTR] = {
3194 .op_func = nfsd4_setxattr,
3195 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3196 .op_name = "OP_SETXATTR",
3197 .op_rsize_bop = nfsd4_setxattr_rsize,
3198 },
3199 [OP_LISTXATTRS] = {
3200 .op_func = nfsd4_listxattrs,
3201 .op_name = "OP_LISTXATTRS",
3202 .op_rsize_bop = nfsd4_listxattrs_rsize,
3203 },
3204 [OP_REMOVEXATTR] = {
3205 .op_func = nfsd4_removexattr,
3206 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME,
3207 .op_name = "OP_REMOVEXATTR",
3208 .op_rsize_bop = nfsd4_removexattr_rsize,
3209 },
b591480b
BF		 3210};
3211
ed941643
AE		 3212/**
3213 * nfsd4_spo_must_allow - Determine if the compound op contains an
3214 * operation that is allowed to be sent with machine credentials
3215 *
3216 * @rqstp: a pointer to the struct svc_rqst
3217 *
3218 * Checks to see if the compound contains a spo_must_allow op
3219 * and confirms that it was sent with the proper machine creds.
3220 */
3221
3222bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
3223{
3224 struct nfsd4_compoundres *resp = rqstp->rq_resp;
3225 struct nfsd4_compoundargs *argp = rqstp->rq_argp;
3226 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1];
3227 struct nfsd4_compound_state *cstate = &resp->cstate;
3228 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow;
3229 u32 opiter;
3230
3231 if (!cstate->minorversion)
3232 return false;
3233
3234 if (cstate->spo_must_allowed == true)
3235 return true;
3236
3237 opiter = resp->opcnt;
3238 while (opiter < argp->opcnt) {
3239 this = &argp->ops[opiter++];
3240 if (test_bit(this->opnum, allow->u.longs) &&
3241 cstate->clp->cl_mach_cred &&
3242 nfsd4_mach_creds_match(cstate->clp, rqstp)) {
3243 cstate->spo_must_allowed = true;
3244 return true;
3245 }
3246 }
3247 cstate->spo_must_allowed = false;
3248 return false;
3249}
3250
4f0cefbf
BF		 3251int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op)
3252{
05b7278d 3253 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp)
4f0cefbf 3254 return op_encode_hdr_size * sizeof(__be32);
2282cd2c
KM		 3255
3256 BUG_ON(OPDESC(op)->op_rsize_bop == NULL);
3257 return OPDESC(op)->op_rsize_bop(rqstp, op);
4f0cefbf
BF		 3258}
3259
07d1f802
BF		 3260void warn_on_nonidempotent_op(struct nfsd4_op *op)
3261{
3262 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) {
3263 pr_err("unable to encode reply to nonidempotent op %d (%s)\n",
3264 op->opnum, nfsd4_op_name(op->opnum));
3265 WARN_ON_ONCE(1);
3266 }
3267}
3268
f1c7f79b 3269static const char *nfsd4_op_name(unsigned opnum)
b001a1b6
BH		 3270{
3271 if (opnum < ARRAY_SIZE(nfsd4_ops))
3272 return nfsd4_ops[opnum].op_name;
3273 return "unknown_operation";
3274}
3275
1da177e4 3276#define nfsd4_voidres nfsd4_voidargs
1da177e4
LT		 3277struct nfsd4_voidargs { int dummy; };
3278
860bda29 3279static const struct svc_procedure nfsd_procedures4[2] = {
0a93a47f 3280 [NFSPROC4_NULL] = {
f7235b6b 3281 .pc_func = nfsd4_proc_null,
63f8de37 3282 .pc_encode = nfs4svc_encode_voidres,
0a93a47f
YZ		 3283 .pc_argsize = sizeof(struct nfsd4_voidargs),
3284 .pc_ressize = sizeof(struct nfsd4_voidres),
3285 .pc_cachetype = RC_NOCACHE,
3286 .pc_xdrressize = 1,
3287 },
3288 [NFSPROC4_COMPOUND] = {
f7235b6b 3289 .pc_func = nfsd4_proc_compound,
026fec7e 3290 .pc_decode = nfs4svc_decode_compoundargs,
63f8de37 3291 .pc_encode = nfs4svc_encode_compoundres,
0a93a47f
YZ		 3292 .pc_argsize = sizeof(struct nfsd4_compoundargs),
3293 .pc_ressize = sizeof(struct nfsd4_compoundres),
3e98abff 3294 .pc_release = nfsd4_release_compoundargs,
0a93a47f
YZ		 3295 .pc_cachetype = RC_NOCACHE,
3296 .pc_xdrressize = NFSD_BUFSIZE/4,
3297 },
1da177e4
LT		 3298};
3299
7fd38af9 3300static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)];
e9679189 3301const struct svc_version nfsd_version4 = {
5283b03e
JL		 3302 .vs_vers = 4,
3303 .vs_nproc = 2,
3304 .vs_proc = nfsd_procedures4,
7fd38af9 3305 .vs_count = nfsd_count3,
5283b03e
JL		 3306 .vs_dispatch = nfsd_dispatch,
3307 .vs_xdrsize = NFS4_SVC_XDRSIZE,
3308 .vs_rpcb_optnl = true,
3309 .vs_need_cong_ctrl = true,
1da177e4
LT		 3310};
3311
3312/*
3313 * Local variables:
3314 * c-basic-offset: 8
3315 * End:
3316 */
Michael's Linux tree.