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NFSv4: encode_attrs should not backfill the bitmap and attribute length
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 84 struct nfs4_state *state, struct nfs4_label *ilabel,
85 struct nfs4_label *olabel);
f062eb6c 86#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
88 struct rpc_cred *);
89static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
f062eb6c 91#endif
aa9c2669
DQ		 92
93#ifdef CONFIG_NFS_V4_SECURITY_LABEL
94static inline struct nfs4_label *
95nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
96 struct iattr *sattr, struct nfs4_label *label)
97{
98 int err;
99
100 if (label == NULL)
101 return NULL;
102
103 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
104 return NULL;
105
106 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
107 return NULL;
108
109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315
BS		 152 case -NFS4ERR_WRONGSEC:
153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
65de872e
TM		 317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 327 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
b064eca2 337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 338{
339 struct nfs_client *clp = server->nfs_client;
9e33bed5 340 struct nfs4_state *state = exception->state;
3114ea7a 341 struct inode *inode = exception->inode;
65de872e
TM		 342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
3114ea7a 348 case -NFS4ERR_OPENMODE:
011e2a7f 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 350 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
5d422301
TM		 356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
3114ea7a 359 goto wait_on_recovery;
a1d0b5ee 360 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
9e33bed5
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
0400a6b0 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
03391693 384#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 385 case -NFS4ERR_BADSESSION:
386 case -NFS4ERR_BADSLOT:
387 case -NFS4ERR_BAD_HIGH_SLOT:
388 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
389 case -NFS4ERR_DEADSESSION:
390 case -NFS4ERR_SEQ_FALSE_RETRY:
391 case -NFS4ERR_SEQ_MISORDERED:
392 dprintk("%s ERROR: %d Reset session\n", __func__,
393 errorcode);
9f594791 394 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 395 goto wait_on_recovery;
03391693 396#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 397 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 398 if (exception->timeout > HZ) {
399 /* We have retried a decent amount, time to
400 * fail
401 */
402 ret = -EBUSY;
403 break;
404 }
65de872e
TM		 405 case -NFS4ERR_GRACE:
406 case -NFS4ERR_DELAY:
407 ret = nfs4_delay(server->client, &exception->timeout);
408 if (ret != 0)
409 break;
a8a4ae3a 410 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 411 case -NFS4ERR_OLD_STATEID:
412 exception->retry = 1;
b064eca2
TM		 413 break;
414 case -NFS4ERR_BADOWNER:
415 /* The following works around a Linux server bug! */
416 case -NFS4ERR_BADNAME:
417 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
418 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
419 exception->retry = 1;
420 printk(KERN_WARNING "NFS: v4 server %s "
421 "does not accept raw "
422 "uid/gids. "
423 "Reenabling the idmapper.\n",
424 server->nfs_client->cl_hostname);
425 }
65de872e
TM		 426 }
427 /* We failed to handle the error */
428 return nfs4_map_errors(ret);
0400a6b0 429wait_on_recovery:
a2c0b9e2
TM		 430 ret = nfs4_wait_clnt_recover(clp);
431 if (ret == 0)
432 exception->retry = 1;
433 return ret;
65de872e
TM		 434}
435
436
452e9352 437static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 438{
1da177e4
LT		 439 spin_lock(&clp->cl_lock);
440 if (time_before(clp->cl_last_renewal,timestamp))
441 clp->cl_last_renewal = timestamp;
442 spin_unlock(&clp->cl_lock);
443}
444
452e9352
TM		 445static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
446{
447 do_renew_lease(server->nfs_client, timestamp);
448}
449
cccef3b9
AA		 450#if defined(CONFIG_NFS_V4_1)
451
d185a334 452static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 453{
e3725ec0 454 struct nfs4_session *session;
13615871 455 struct nfs4_slot_table *tbl;
c10e4498 456 bool send_new_highest_used_slotid = false;
13615871 457
dfb4f309 458 if (!res->sr_slot) {
13615871
AA		 459 /* just wake up the next guy waiting since
460 * we may have not consumed a slot after all */
691daf3b 461 dprintk("%s: No slot\n", __func__);
35dc1d74 462 return;
13615871 463 }
e3725ec0
TM		 464 tbl = res->sr_slot->table;
465 session = tbl->session;
ea028ac9 466
35dc1d74 467 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 468 /* Be nice to the server: try to ensure that the last transmitted
469 * value for highest_user_slotid <= target_highest_slotid
470 */
471 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
472 send_new_highest_used_slotid = true;
473
b75ad4cd
TM		 474 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
475 send_new_highest_used_slotid = false;
476 goto out_unlock;
477 }
f4af6e2a 478 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 479
480 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
481 send_new_highest_used_slotid = false;
b75ad4cd 482out_unlock:
35dc1d74 483 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 484 res->sr_slot = NULL;
c10e4498
TM		 485 if (send_new_highest_used_slotid)
486 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 487}
488
14516c3a 489static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 490{
e3725ec0 491 struct nfs4_session *session;
933602e3 492 struct nfs4_slot *slot;
14516c3a 493 struct nfs_client *clp;
ac20d163 494 bool interrupted = false;
85563073 495 int ret = 1;
b0df806c 496
468f8613
BS		 497 /* don't increment the sequence number if the task wasn't sent */
498 if (!RPC_WAS_SENT(task))
b0df806c
AA		 499 goto out;
500
933602e3 501 slot = res->sr_slot;
e3725ec0 502 session = slot->table->session;
933602e3 503
ac20d163
TM		 504 if (slot->interrupted) {
505 slot->interrupted = 0;
506 interrupted = true;
507 }
508
691daf3b 509 /* Check the SEQUENCE operation status */
14516c3a
TM		 510 switch (res->sr_status) {
511 case 0:
b0df806c 512 /* Update the slot's sequence and clientid lease timer */
933602e3 513 ++slot->seq_nr;
e3725ec0 514 clp = session->clp;
8e63b6a8 515 do_renew_lease(clp, res->sr_timestamp);
0629e370 516 /* Check sequence flags */
b4410c2f
TM		 517 if (res->sr_status_flags != 0)
518 nfs4_schedule_lease_recovery(clp);
464ee9f9 519 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 520 break;
ac20d163
TM		 521 case 1:
522 /*
523 * sr_status remains 1 if an RPC level error occurred.
524 * The server may or may not have processed the sequence
525 * operation..
526 * Mark the slot as having hosted an interrupted RPC call.
527 */
528 slot->interrupted = 1;
529 goto out;
14516c3a
TM		 530 case -NFS4ERR_DELAY:
531 /* The server detected a resend of the RPC call and
532 * returned NFS4ERR_DELAY as per Section 2.10.6.2
533 * of RFC5661.
534 */
df2fabff 535 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 536 __func__,
df2fabff 537 slot->slot_nr,
933602e3 538 slot->seq_nr);
14516c3a 539 goto out_retry;
85563073
TM		 540 case -NFS4ERR_BADSLOT:
541 /*
542 * The slot id we used was probably retired. Try again
543 * using a different slot id.
544 */
e8794440
TM		 545 goto retry_nowait;
546 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 547 /*
548 * Was the last operation on this sequence interrupted?
549 * If so, retry after bumping the sequence number.
550 */
551 if (interrupted) {
552 ++slot->seq_nr;
553 goto retry_nowait;
554 }
e8794440
TM		 555 /*
556 * Could this slot have been previously retired?
557 * If so, then the server may be expecting seq_nr = 1!
558 */
8e63b6a8
TM		 559 if (slot->seq_nr != 1) {
560 slot->seq_nr = 1;
561 goto retry_nowait;
562 }
563 break;
e8794440
TM		 564 case -NFS4ERR_SEQ_FALSE_RETRY:
565 ++slot->seq_nr;
566 goto retry_nowait;
14516c3a
TM		 567 default:
568 /* Just update the slot sequence no. */
933602e3 569 ++slot->seq_nr;
b0df806c
AA		 570 }
571out:
572 /* The session may be reset by one of the error handlers. */
573 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 574 nfs41_sequence_free_slot(res);
85563073 575 return ret;
e8794440
TM		 576retry_nowait:
577 if (rpc_restart_call_prepare(task)) {
578 task->tk_status = 0;
579 ret = 0;
580 }
581 goto out;
14516c3a 582out_retry:
d05dd4e9 583 if (!rpc_restart_call(task))
14516c3a
TM		 584 goto out;
585 rpc_delay(task, NFS4_POLL_RETRY_MAX);
586 return 0;
b0df806c
AA		 587}
588
14516c3a
TM		 589static int nfs4_sequence_done(struct rpc_task *task,
590 struct nfs4_sequence_res *res)
df896455 591{
e3725ec0 592 if (res->sr_slot == NULL)
14516c3a
TM		 593 return 1;
594 return nfs41_sequence_done(task, res);
df896455
TM		 595}
596
9d12b216
TM		 597static void nfs41_init_sequence(struct nfs4_sequence_args *args,
598 struct nfs4_sequence_res *res, int cache_reply)
599{
2b2fa717 600 args->sa_slot = NULL;
9d12b216 601 args->sa_cache_this = 0;
8fe72bac 602 args->sa_privileged = 0;
9d12b216
TM		 603 if (cache_reply)
604 args->sa_cache_this = 1;
9d12b216
TM		 605 res->sr_slot = NULL;
606}
607
8fe72bac
TM		 608static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
609{
610 args->sa_privileged = 1;
611}
612
dc70d7b3 613int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 614 struct nfs4_sequence_args *args,
615 struct nfs4_sequence_res *res,
ce5039c1
AA		 616 struct rpc_task *task)
617{
fbcd4abc
AA		 618 struct nfs4_slot *slot;
619 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 620
621 dprintk("--> %s\n", __func__);
ce5039c1 622 /* slot already allocated? */
dfb4f309 623 if (res->sr_slot != NULL)
d9afbd1b 624 goto out_success;
ce5039c1 625
fbcd4abc
AA		 626 tbl = &session->fc_slot_table;
627
69d206b5
TM		 628 task->tk_timeout = 0;
629
fbcd4abc 630 spin_lock(&tbl->slot_tbl_lock);
774d5f14 631 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 632 !args->sa_privileged) {
0b1c8fc4 633 /* The state manager will wait until the slot table is empty */
0b1c8fc4 634 dprintk("%s session is draining\n", __func__);
7b939a3f 635 goto out_sleep;
689cf5c1
AB		 636 }
637
2dc03b7f 638 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 639 if (IS_ERR(slot)) {
640 /* If out of memory, try again in 1/4 second */
641 if (slot == ERR_PTR(-ENOMEM))
642 task->tk_timeout = HZ >> 2;
fbcd4abc 643 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 644 goto out_sleep;
fbcd4abc
AA		 645 }
646 spin_unlock(&tbl->slot_tbl_lock);
647
2b2fa717 648 args->sa_slot = slot;
fbcd4abc 649
2dc03b7f
TM		 650 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
651 slot->slot_nr, slot->seq_nr);
fbcd4abc 652
dfb4f309 653 res->sr_slot = slot;
8e63b6a8 654 res->sr_timestamp = jiffies;
2a6e26cd 655 res->sr_status_flags = 0;
fbcd4abc
AA		 656 /*
657 * sr_status is only set in decode_sequence, and so will remain
658 * set to 1 if an rpc level failure occurs.
659 */
660 res->sr_status = 1;
d9afbd1b
TM		 661out_success:
662 rpc_call_start(task);
ce5039c1 663 return 0;
7b939a3f 664out_sleep:
8fe72bac
TM		 665 /* Privileged tasks are queued with top priority */
666 if (args->sa_privileged)
1e1093c7
TM		 667 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
668 NULL, RPC_PRIORITY_PRIVILEGED);
669 else
670 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 671 spin_unlock(&tbl->slot_tbl_lock);
672 return -EAGAIN;
ce5039c1 673}
dc70d7b3 674EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 675
035168ab 676int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 677 struct nfs4_sequence_args *args,
678 struct nfs4_sequence_res *res,
ce5039c1
AA		 679 struct rpc_task *task)
680{
035168ab 681 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 682 int ret = 0;
683
d9afbd1b
TM		 684 if (session == NULL) {
685 rpc_call_start(task);
035168ab 686 goto out;
d9afbd1b 687 }
035168ab 688
df2fabff 689 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 690 __func__, session->clp, session, res->sr_slot ?
df2fabff 691 res->sr_slot->slot_nr : -1);
ce5039c1 692
9d12b216 693 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 694out:
695 dprintk("<-- %s status=%d\n", __func__, ret);
696 return ret;
697}
698
699struct nfs41_call_sync_data {
035168ab 700 const struct nfs_server *seq_server;
ce5039c1
AA		 701 struct nfs4_sequence_args *seq_args;
702 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 703};
704
705static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
706{
707 struct nfs41_call_sync_data *data = calldata;
6ba7db34 708 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 709
035168ab
TM		 710 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
711
d9afbd1b 712 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 713}
714
69ab40c4
AA		 715static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
716{
717 struct nfs41_call_sync_data *data = calldata;
718
14516c3a 719 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 720}
721
17280175 722static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 723 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 724 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 725};
726
7c513058
BS		 727static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
728 struct nfs_server *server,
ce5039c1
AA		 729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
8fe72bac 731 struct nfs4_sequence_res *res)
ce5039c1
AA		 732{
733 int ret;
734 struct rpc_task *task;
735 struct nfs41_call_sync_data data = {
035168ab 736 .seq_server = server,
ce5039c1
AA		 737 .seq_args = args,
738 .seq_res = res,
ce5039c1
AA		 739 };
740 struct rpc_task_setup task_setup = {
7c513058 741 .rpc_client = clnt,
ce5039c1
AA		 742 .rpc_message = msg,
743 .callback_ops = &nfs41_call_sync_ops,
744 .callback_data = &data
745 };
746
ce5039c1
AA		 747 task = rpc_run_task(&task_setup);
748 if (IS_ERR(task))
749 ret = PTR_ERR(task);
750 else {
751 ret = task->tk_status;
752 rpc_put_task(task);
753 }
754 return ret;
755}
756
df896455 757#else
8fe72bac 758static
9d12b216
TM		 759void nfs41_init_sequence(struct nfs4_sequence_args *args,
760 struct nfs4_sequence_res *res, int cache_reply)
761{
762}
763
8fe72bac
TM		 764static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
765{
766}
767
768
14516c3a
TM		 769static int nfs4_sequence_done(struct rpc_task *task,
770 struct nfs4_sequence_res *res)
df896455 771{
14516c3a 772 return 1;
df896455 773}
cccef3b9
AA		 774#endif /* CONFIG_NFS_V4_1 */
775
fd0c0953 776static
7c513058
BS		 777int _nfs4_call_sync(struct rpc_clnt *clnt,
778 struct nfs_server *server,
cccef3b9
AA		 779 struct rpc_message *msg,
780 struct nfs4_sequence_args *args,
fd0c0953 781 struct nfs4_sequence_res *res)
cccef3b9 782{
7c513058 783 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 784}
785
fd0c0953 786static
7c513058
BS		 787int nfs4_call_sync(struct rpc_clnt *clnt,
788 struct nfs_server *server,
e73b83f2
BS		 789 struct rpc_message *msg,
790 struct nfs4_sequence_args *args,
791 struct nfs4_sequence_res *res,
792 int cache_reply)
793{
fd0c0953 794 nfs41_init_sequence(args, res, cache_reply);
7c513058 795 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 796 args, res);
e73b83f2 797}
cccef3b9 798
38478b24 799static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 800{
38478b24 801 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 802
38478b24 803 spin_lock(&dir->i_lock);
359d7d1c 804 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 805 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 806 nfs_force_lookup_revalidate(dir);
a9a4a87a 807 dir->i_version = cinfo->after;
de242c0b 808 nfs_fscache_invalidate(dir);
38478b24 809 spin_unlock(&dir->i_lock);
1da177e4
LT		 810}
811
e56e0b78 812struct nfs4_opendata {
c6d00e63 813 struct kref kref;
e56e0b78
TM		 814 struct nfs_openargs o_arg;
815 struct nfs_openres o_res;
cdd4e68b
TM		 816 struct nfs_open_confirmargs c_arg;
817 struct nfs_open_confirmres c_res;
6926afd1
TM		 818 struct nfs4_string owner_name;
819 struct nfs4_string group_name;
e56e0b78 820 struct nfs_fattr f_attr;
1775fd3e 821 struct nfs4_label *f_label;
e56e0b78 822 struct dentry *dir;
82a2c1b7 823 struct dentry *dentry;
e56e0b78 824 struct nfs4_state_owner *owner;
aac00a8d 825 struct nfs4_state *state;
e56e0b78 826 struct iattr attrs;
26e976a8 827 unsigned long timestamp;
3e309914 828 unsigned int rpc_done : 1;
bdeca1b7 829 unsigned int is_recover : 1;
24ac23ab
TM		 830 int rpc_status;
831 int cancelled;
e56e0b78
TM		 832};
833
49f9a0fa
TM		 834static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
835 int err, struct nfs4_exception *exception)
836{
837 if (err != -EINVAL)
838 return false;
839 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
840 return false;
841 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
842 exception->retry = 1;
843 return true;
844}
845
846static enum open_claim_type4
847nfs4_map_atomic_open_claim(struct nfs_server *server,
848 enum open_claim_type4 claim)
849{
850 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
851 return claim;
852 switch (claim) {
853 default:
854 return claim;
855 case NFS4_OPEN_CLAIM_FH:
856 return NFS4_OPEN_CLAIM_NULL;
857 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
858 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
859 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
860 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
861 }
862}
2ced46c2
TM		 863
864static void nfs4_init_opendata_res(struct nfs4_opendata *p)
865{
866 p->o_res.f_attr = &p->f_attr;
1775fd3e 867 p->o_res.f_label = p->f_label;
c1d51931
TM		 868 p->o_res.seqid = p->o_arg.seqid;
869 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 870 p->o_res.server = p->o_arg.server;
5f657530 871 p->o_res.access_request = p->o_arg.access;
2ced46c2 872 nfs_fattr_init(&p->f_attr);
6926afd1 873 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 874}
875
82a2c1b7 876static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 877 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 878 const struct iattr *attrs,
1775fd3e 879 struct nfs4_label *label,
4a1c0893 880 enum open_claim_type4 claim,
8535b2be 881 gfp_t gfp_mask)
e56e0b78 882{
82a2c1b7 883 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 884 struct inode *dir = parent->d_inode;
885 struct nfs_server *server = NFS_SERVER(dir);
886 struct nfs4_opendata *p;
887
8535b2be 888 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 889 if (p == NULL)
890 goto err;
14c43f76
DQ		 891
892 p->f_label = nfs4_label_alloc(server, gfp_mask);
893 if (IS_ERR(p->f_label))
894 goto err_free_p;
895
8535b2be 896 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 897 if (p->o_arg.seqid == NULL)
14c43f76 898 goto err_free_label;
82a2c1b7
AV		 899 nfs_sb_active(dentry->d_sb);
900 p->dentry = dget(dentry);
e56e0b78
TM		 901 p->dir = parent;
902 p->owner = sp;
903 atomic_inc(&sp->so_count);
dc0b027d
TM		 904 p->o_arg.open_flags = flags;
905 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 906 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
907 * will return permission denied for all bits until close */
908 if (!(flags & O_EXCL)) {
909 /* ask server to check for all possible rights as results
910 * are cached */
911 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
912 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 913 }
7539bbab 914 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 915 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
916 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 917 p->o_arg.name = &dentry->d_name;
e56e0b78 918 p->o_arg.server = server;
aa9c2669 919 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 920 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 921 p->o_arg.label = label;
49f9a0fa
TM		 922 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
923 switch (p->o_arg.claim) {
4a1c0893
TM		 924 case NFS4_OPEN_CLAIM_NULL:
925 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
926 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
927 p->o_arg.fh = NFS_FH(dir);
928 break;
929 case NFS4_OPEN_CLAIM_PREVIOUS:
930 case NFS4_OPEN_CLAIM_FH:
931 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
932 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
933 p->o_arg.fh = NFS_FH(dentry->d_inode);
934 }
536e43d1 935 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 936 __be32 verf[2];
d77d76ff 937
e56e0b78
TM		 938 p->o_arg.u.attrs = &p->attrs;
939 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 940
941 verf[0] = jiffies;
942 verf[1] = current->pid;
943 memcpy(p->o_arg.u.verifier.data, verf,
944 sizeof(p->o_arg.u.verifier.data));
e56e0b78 945 }
cdd4e68b
TM		 946 p->c_arg.fh = &p->o_res.fh;
947 p->c_arg.stateid = &p->o_res.stateid;
948 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 949 nfs4_init_opendata_res(p);
c6d00e63 950 kref_init(&p->kref);
e56e0b78 951 return p;
14c43f76
DQ		 952
953err_free_label:
954 nfs4_label_free(p->f_label);
955err_free_p:
e56e0b78
TM		 956 kfree(p);
957err:
958 dput(parent);
959 return NULL;
960}
961
c6d00e63 962static void nfs4_opendata_free(struct kref *kref)
e56e0b78 963{
c6d00e63
TM		 964 struct nfs4_opendata *p = container_of(kref,
965 struct nfs4_opendata, kref);
82a2c1b7 966 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 967
968 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 969 if (p->state != NULL)
970 nfs4_put_open_state(p->state);
c6d00e63 971 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 972
973 nfs4_label_free(p->f_label);
974
c6d00e63 975 dput(p->dir);
82a2c1b7
AV		 976 dput(p->dentry);
977 nfs_sb_deactive(sb);
6926afd1 978 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 979 kfree(p);
980}
981
982static void nfs4_opendata_put(struct nfs4_opendata *p)
983{
984 if (p != NULL)
985 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 986}
987
06f814a3
TM		 988static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
989{
06f814a3
TM		 990 int ret;
991
06f814a3 992 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 993 return ret;
994}
995
dc0b027d 996static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 997{
998 int ret = 0;
dc0b027d 999
536e43d1 1000 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1001 goto out;
1002 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1003 case FMODE_READ:
88069f77
TM		 1004 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1005 && state->n_rdonly != 0;
6ee41268
TM		 1006 break;
1007 case FMODE_WRITE:
88069f77
TM		 1008 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1009 && state->n_wronly != 0;
6ee41268
TM		 1010 break;
1011 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1012 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1013 && state->n_rdwr != 0;
6ee41268 1014 }
dc0b027d 1015out:
6ee41268
TM		 1016 return ret;
1017}
1018
dc0b027d 1019static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1020{
652f89f6
TM		 1021 if (delegation == NULL)
1022 return 0;
dc0b027d 1023 if ((delegation->type & fmode) != fmode)
aac00a8d 1024 return 0;
15c831bf 1025 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1026 return 0;
d25be546
TM		 1027 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1028 return 0;
b7391f44 1029 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1030 return 1;
1031}
1032
dc0b027d 1033static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1034{
dc0b027d 1035 switch (fmode) {
e7616923
TM		 1036 case FMODE_WRITE:
1037 state->n_wronly++;
1038 break;
1039 case FMODE_READ:
1040 state->n_rdonly++;
1041 break;
1042 case FMODE_READ|FMODE_WRITE:
1043 state->n_rdwr++;
1044 }
dc0b027d 1045 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1046}
1047
dc0b027d 1048static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1049{
1050 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1051 nfs4_stateid_copy(&state->stateid, stateid);
1052 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1053 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1054 switch (fmode) {
003707c7
TM		 1055 case FMODE_READ:
1056 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1057 break;
1058 case FMODE_WRITE:
1059 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1060 break;
1061 case FMODE_READ|FMODE_WRITE:
1062 set_bit(NFS_O_RDWR_STATE, &state->flags);
1063 }
e7616923
TM		 1064}
1065
dc0b027d 1066static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1067{
8bda4e4c 1068 write_seqlock(&state->seqlock);
dc0b027d 1069 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1070 write_sequnlock(&state->seqlock);
003707c7
TM		 1071}
1072
dc0b027d 1073static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1074{
8bda4e4c
TM		 1075 /*
1076 * Protect the call to nfs4_state_set_mode_locked and
1077 * serialise the stateid update
1078 */
1079 write_seqlock(&state->seqlock);
003707c7 1080 if (deleg_stateid != NULL) {
f597c537 1081 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1082 set_bit(NFS_DELEGATED_STATE, &state->flags);
1083 }
1084 if (open_stateid != NULL)
dc0b027d 1085 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1086 write_sequnlock(&state->seqlock);
1087 spin_lock(&state->owner->so_lock);
dc0b027d 1088 update_open_stateflags(state, fmode);
ec073428 1089 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1090}
1091
dc0b027d 1092static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1093{
1094 struct nfs_inode *nfsi = NFS_I(state->inode);
1095 struct nfs_delegation *deleg_cur;
1096 int ret = 0;
1097
dc0b027d 1098 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1099
1100 rcu_read_lock();
1101 deleg_cur = rcu_dereference(nfsi->delegation);
1102 if (deleg_cur == NULL)
1103 goto no_delegation;
1104
1105 spin_lock(&deleg_cur->lock);
1106 if (nfsi->delegation != deleg_cur ||
d25be546 1107 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1108 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1109 goto no_delegation_unlock;
1110
1111 if (delegation == NULL)
1112 delegation = &deleg_cur->stateid;
f597c537 1113 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1114 goto no_delegation_unlock;
1115
b7391f44 1116 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1117 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1118 ret = 1;
1119no_delegation_unlock:
1120 spin_unlock(&deleg_cur->lock);
1121no_delegation:
1122 rcu_read_unlock();
1123
1124 if (!ret && open_stateid != NULL) {
dc0b027d 1125 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1126 ret = 1;
1127 }
1128
1129 return ret;
1130}
1131
1132
dc0b027d 1133static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1134{
1135 struct nfs_delegation *delegation;
1136
1137 rcu_read_lock();
1138 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1139 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1140 rcu_read_unlock();
1141 return;
1142 }
1143 rcu_read_unlock();
57ec14c5 1144 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1145}
1146
6ee41268 1147static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1148{
1149 struct nfs4_state *state = opendata->state;
1150 struct nfs_inode *nfsi = NFS_I(state->inode);
1151 struct nfs_delegation *delegation;
f448badd 1152 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1153 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1154 nfs4_stateid stateid;
1155 int ret = -EAGAIN;
1156
aac00a8d 1157 for (;;) {
dc0b027d 1158 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1159 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1160 if (can_open_cached(state, fmode, open_mode)) {
1161 update_open_stateflags(state, fmode);
6ee41268 1162 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1163 goto out_return_state;
1164 }
1165 spin_unlock(&state->owner->so_lock);
1166 }
34310430
TM		 1167 rcu_read_lock();
1168 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1169 if (!can_open_delegated(delegation, fmode)) {
34310430 1170 rcu_read_unlock();
aac00a8d 1171 break;
34310430 1172 }
aac00a8d 1173 /* Save the delegation */
f597c537 1174 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1175 rcu_read_unlock();
fa332941 1176 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1177 if (!opendata->is_recover) {
1178 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1179 if (ret != 0)
1180 goto out;
1181 }
aac00a8d 1182 ret = -EAGAIN;
34310430
TM		 1183
1184 /* Try to update the stateid using the delegation */
dc0b027d 1185 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1186 goto out_return_state;
aac00a8d 1187 }
aac00a8d
TM		 1188out:
1189 return ERR_PTR(ret);
1190out_return_state:
1191 atomic_inc(&state->count);
1192 return state;
1193}
1194
e23008ec
AA		 1195static void
1196nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1197{
1198 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1199 struct nfs_delegation *delegation;
1200 int delegation_flags = 0;
1201
1202 rcu_read_lock();
1203 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1204 if (delegation)
1205 delegation_flags = delegation->flags;
1206 rcu_read_unlock();
1207 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1208 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1209 "returning a delegation for "
1210 "OPEN(CLAIM_DELEGATE_CUR)\n",
1211 clp->cl_hostname);
1212 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1213 nfs_inode_set_delegation(state->inode,
1214 data->owner->so_cred,
1215 &data->o_res);
1216 else
1217 nfs_inode_reclaim_delegation(state->inode,
1218 data->owner->so_cred,
1219 &data->o_res);
1220}
1221
1222/*
1223 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1224 * and update the nfs4_state.
1225 */
1226static struct nfs4_state *
1227_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1228{
1229 struct inode *inode = data->state->inode;
1230 struct nfs4_state *state = data->state;
1231 int ret;
1232
1233 if (!data->rpc_done) {
1234 ret = data->rpc_status;
1235 goto err;
1236 }
1237
1238 ret = -ESTALE;
1239 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1240 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1241 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1242 goto err;
1243
1244 ret = -ENOMEM;
1245 state = nfs4_get_open_state(inode, data->owner);
1246 if (state == NULL)
1247 goto err;
1248
1249 ret = nfs_refresh_inode(inode, &data->f_attr);
1250 if (ret)
1251 goto err;
1252
aa9c2669
DQ		 1253 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1254
e23008ec
AA		 1255 if (data->o_res.delegation_type != 0)
1256 nfs4_opendata_check_deleg(data, state);
1257 update_open_stateid(state, &data->o_res.stateid, NULL,
1258 data->o_arg.fmode);
1259
1260 return state;
1261err:
1262 return ERR_PTR(ret);
1263
1264}
1265
1266static struct nfs4_state *
1267_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1268{
1269 struct inode *inode;
1270 struct nfs4_state *state = NULL;
1b370bc2 1271 int ret;
24ac23ab 1272
aac00a8d 1273 if (!data->rpc_done) {
6ee41268 1274 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1275 goto out;
1276 }
1277
1b370bc2 1278 ret = -EAGAIN;
24ac23ab 1279 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1280 goto err;
1775fd3e 1281 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1282 ret = PTR_ERR(inode);
03f28e3a 1283 if (IS_ERR(inode))
1b370bc2
TM		 1284 goto err;
1285 ret = -ENOMEM;
24ac23ab
TM		 1286 state = nfs4_get_open_state(inode, data->owner);
1287 if (state == NULL)
1b370bc2 1288 goto err_put_inode;
e23008ec
AA		 1289 if (data->o_res.delegation_type != 0)
1290 nfs4_opendata_check_deleg(data, state);
34310430 1291 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1292 data->o_arg.fmode);
24ac23ab 1293 iput(inode);
aac00a8d 1294out:
7aa262b5 1295 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1296 return state;
1b370bc2
TM		 1297err_put_inode:
1298 iput(inode);
1299err:
1300 return ERR_PTR(ret);
24ac23ab
TM		 1301}
1302
e23008ec
AA		 1303static struct nfs4_state *
1304nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1305{
1306 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1307 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1308 return _nfs4_opendata_to_nfs4_state(data);
1309}
1310
864472e9
TM		 1311static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1312{
1313 struct nfs_inode *nfsi = NFS_I(state->inode);
1314 struct nfs_open_context *ctx;
1315
1316 spin_lock(&state->inode->i_lock);
1317 list_for_each_entry(ctx, &nfsi->open_files, list) {
1318 if (ctx->state != state)
1319 continue;
1320 get_nfs_open_context(ctx);
1321 spin_unlock(&state->inode->i_lock);
1322 return ctx;
1323 }
1324 spin_unlock(&state->inode->i_lock);
1325 return ERR_PTR(-ENOENT);
1326}
1327
4a1c0893
TM		 1328static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1329 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1330{
1331 struct nfs4_opendata *opendata;
1332
4a1c0893 1333 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1334 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1335 if (opendata == NULL)
1336 return ERR_PTR(-ENOMEM);
1337 opendata->state = state;
1338 atomic_inc(&state->count);
1339 return opendata;
1340}
1341
dc0b027d 1342static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1343{
2ced46c2 1344 struct nfs4_state *newstate;
864472e9
TM		 1345 int ret;
1346
dc0b027d
TM		 1347 opendata->o_arg.open_flags = 0;
1348 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1349 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1350 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1351 nfs4_init_opendata_res(opendata);
b257957e 1352 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1353 if (ret != 0)
1354 return ret;
2ced46c2 1355 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1356 if (IS_ERR(newstate))
1357 return PTR_ERR(newstate);
643168c2 1358 nfs4_close_state(newstate, fmode);
2ced46c2 1359 *res = newstate;
864472e9
TM		 1360 return 0;
1361}
1362
1363static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1364{
864472e9 1365 struct nfs4_state *newstate;
864472e9
TM		 1366 int ret;
1367
1368 /* memory barrier prior to reading state->n_* */
2ced46c2 1369 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1370 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1371 smp_rmb();
1372 if (state->n_rdwr != 0) {
b0ed9dbc 1373 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1374 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1375 if (ret != 0)
1376 return ret;
2ced46c2
TM		 1377 if (newstate != state)
1378 return -ESTALE;
864472e9
TM		 1379 }
1380 if (state->n_wronly != 0) {
b0ed9dbc 1381 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1382 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1383 if (ret != 0)
1384 return ret;
2ced46c2
TM		 1385 if (newstate != state)
1386 return -ESTALE;
864472e9
TM		 1387 }
1388 if (state->n_rdonly != 0) {
b0ed9dbc 1389 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1390 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1391 if (ret != 0)
1392 return ret;
2ced46c2
TM		 1393 if (newstate != state)
1394 return -ESTALE;
864472e9 1395 }
1ac7e2fd
TM		 1396 /*
1397 * We may have performed cached opens for all three recoveries.
1398 * Check if we need to update the current stateid.
1399 */
1400 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1401 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1402 write_seqlock(&state->seqlock);
1ac7e2fd 1403 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1404 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1405 write_sequnlock(&state->seqlock);
1ac7e2fd 1406 }
864472e9
TM		 1407 return 0;
1408}
1409
1da177e4
LT		 1410/*
1411 * OPEN_RECLAIM:
1412 * reclaim state on the server after a reboot.
1da177e4 1413 */
539cd03a 1414static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1415{
1ac7e2fd 1416 struct nfs_delegation *delegation;
864472e9 1417 struct nfs4_opendata *opendata;
dc0b027d 1418 fmode_t delegation_type = 0;
1da177e4
LT		 1419 int status;
1420
4a1c0893
TM		 1421 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1422 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1423 if (IS_ERR(opendata))
1424 return PTR_ERR(opendata);
1ac7e2fd
TM		 1425 rcu_read_lock();
1426 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1427 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1428 delegation_type = delegation->type;
1ac7e2fd 1429 rcu_read_unlock();
864472e9
TM		 1430 opendata->o_arg.u.delegation_type = delegation_type;
1431 status = nfs4_open_recover(opendata, state);
c6d00e63 1432 nfs4_opendata_put(opendata);
1da177e4
LT		 1433 return status;
1434}
1435
539cd03a 1436static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1437{
1438 struct nfs_server *server = NFS_SERVER(state->inode);
1439 struct nfs4_exception exception = { };
1440 int err;
1441 do {
539cd03a 1442 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1443 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1444 continue;
168667c4 1445 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1446 break;
1447 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1448 } while (exception.retry);
1449 return err;
1450}
1451
864472e9
TM		 1452static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1453{
1454 struct nfs_open_context *ctx;
1455 int ret;
1456
1457 ctx = nfs4_state_find_open_context(state);
1458 if (IS_ERR(ctx))
91876b13 1459 return -EAGAIN;
539cd03a 1460 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1461 put_nfs_open_context(ctx);
1462 return ret;
1463}
1464
db4f2e63 1465static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1466{
be76b5b6
TM		 1467 switch (err) {
1468 default:
1469 printk(KERN_ERR "NFS: %s: unhandled error "
1470 "%d.\n", __func__, err);
1471 case 0:
1472 case -ENOENT:
1473 case -ESTALE:
1474 break;
1475 case -NFS4ERR_BADSESSION:
1476 case -NFS4ERR_BADSLOT:
1477 case -NFS4ERR_BAD_HIGH_SLOT:
1478 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1479 case -NFS4ERR_DEADSESSION:
1480 set_bit(NFS_DELEGATED_STATE, &state->flags);
1481 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1482 return -EAGAIN;
1483 case -NFS4ERR_STALE_CLIENTID:
1484 case -NFS4ERR_STALE_STATEID:
1485 set_bit(NFS_DELEGATED_STATE, &state->flags);
1486 case -NFS4ERR_EXPIRED:
1487 /* Don't recall a delegation if it was lost */
1488 nfs4_schedule_lease_recovery(server->nfs_client);
1489 return -EAGAIN;
1490 case -NFS4ERR_DELEG_REVOKED:
1491 case -NFS4ERR_ADMIN_REVOKED:
1492 case -NFS4ERR_BAD_STATEID:
db4f2e63 1493 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1494 nfs_inode_find_state_and_recover(state->inode,
1495 stateid);
1496 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1497 return 0;
1498 case -NFS4ERR_DELAY:
1499 case -NFS4ERR_GRACE:
1500 set_bit(NFS_DELEGATED_STATE, &state->flags);
1501 ssleep(1);
1502 return -EAGAIN;
db4f2e63
TM		 1503 case -ENOMEM:
1504 case -NFS4ERR_DENIED:
1505 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1506 return 0;
be76b5b6 1507 }
1da177e4
LT		 1508 return err;
1509}
1510
db4f2e63
TM		 1511int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1512{
1513 struct nfs_server *server = NFS_SERVER(state->inode);
1514 struct nfs4_opendata *opendata;
1515 int err;
1516
1517 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1518 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1519 if (IS_ERR(opendata))
1520 return PTR_ERR(opendata);
1521 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1522 err = nfs4_open_recover(opendata, state);
1523 nfs4_opendata_put(opendata);
1524 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1525}
1526
cdd4e68b
TM		 1527static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1528{
1529 struct nfs4_opendata *data = calldata;
1530
1531 data->rpc_status = task->tk_status;
26e976a8 1532 if (data->rpc_status == 0) {
f597c537 1533 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1534 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1535 renew_lease(data->o_res.server, data->timestamp);
3e309914 1536 data->rpc_done = 1;
26e976a8 1537 }
cdd4e68b
TM		 1538}
1539
1540static void nfs4_open_confirm_release(void *calldata)
1541{
1542 struct nfs4_opendata *data = calldata;
1543 struct nfs4_state *state = NULL;
1544
1545 /* If this request hasn't been cancelled, do nothing */
1546 if (data->cancelled == 0)
1547 goto out_free;
1548 /* In case of error, no cleanup! */
3e309914 1549 if (!data->rpc_done)
cdd4e68b 1550 goto out_free;
cdd4e68b 1551 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1552 if (!IS_ERR(state))
643168c2 1553 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1554out_free:
c6d00e63 1555 nfs4_opendata_put(data);
cdd4e68b
TM		 1556}
1557
1558static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1559 .rpc_call_done = nfs4_open_confirm_done,
1560 .rpc_release = nfs4_open_confirm_release,
1561};
1562
1563/*
1564 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1565 */
1566static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1567{
1568 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1569 struct rpc_task *task;
5138fde0
TM		 1570 struct rpc_message msg = {
1571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1572 .rpc_argp = &data->c_arg,
1573 .rpc_resp = &data->c_res,
1574 .rpc_cred = data->owner->so_cred,
1575 };
c970aa85
TM		 1576 struct rpc_task_setup task_setup_data = {
1577 .rpc_client = server->client,
5138fde0 1578 .rpc_message = &msg,
c970aa85
TM		 1579 .callback_ops = &nfs4_open_confirm_ops,
1580 .callback_data = data,
101070ca 1581 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1582 .flags = RPC_TASK_ASYNC,
1583 };
1da177e4
LT		 1584 int status;
1585
c6d00e63 1586 kref_get(&data->kref);
3e309914
TM		 1587 data->rpc_done = 0;
1588 data->rpc_status = 0;
5138fde0 1589 data->timestamp = jiffies;
c970aa85 1590 task = rpc_run_task(&task_setup_data);
7a1218a2 1591 if (IS_ERR(task))
cdd4e68b 1592 return PTR_ERR(task);
cdd4e68b
TM		 1593 status = nfs4_wait_for_completion_rpc_task(task);
1594 if (status != 0) {
1595 data->cancelled = 1;
1596 smp_wmb();
1597 } else
1598 status = data->rpc_status;
e6b3c4db 1599 rpc_put_task(task);
1da177e4
LT		 1600 return status;
1601}
1602
24ac23ab 1603static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1604{
24ac23ab
TM		 1605 struct nfs4_opendata *data = calldata;
1606 struct nfs4_state_owner *sp = data->owner;
549b19cc 1607 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1608
24ac23ab 1609 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1610 goto out_wait;
aac00a8d
TM		 1611 /*
1612 * Check if we still need to send an OPEN call, or if we can use
1613 * a delegation instead.
1614 */
1615 if (data->state != NULL) {
1616 struct nfs_delegation *delegation;
1617
dc0b027d 1618 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1619 goto out_no_action;
aac00a8d
TM		 1620 rcu_read_lock();
1621 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1622 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1623 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1624 can_open_delegated(delegation, data->o_arg.fmode))
1625 goto unlock_no_action;
aac00a8d
TM		 1626 rcu_read_unlock();
1627 }
95b72eb0 1628 /* Update client id. */
549b19cc 1629 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1630 switch (data->o_arg.claim) {
1631 case NFS4_OPEN_CLAIM_PREVIOUS:
1632 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1633 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1634 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1635 case NFS4_OPEN_CLAIM_FH:
1636 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1637 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1638 }
26e976a8 1639 data->timestamp = jiffies;
035168ab 1640 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1641 &data->o_arg.seq_args,
2240a9e2
TM		 1642 &data->o_res.seq_res,
1643 task) != 0)
1644 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1645
1646 /* Set the create mode (note dependency on the session type) */
1647 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1648 if (data->o_arg.open_flags & O_EXCL) {
1649 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1650 if (nfs4_has_persistent_session(clp))
1651 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1652 else if (clp->cl_mvops->minor_version > 0)
1653 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1654 }
6ee41268 1655 return;
652f89f6
TM		 1656unlock_no_action:
1657 rcu_read_unlock();
6ee41268
TM		 1658out_no_action:
1659 task->tk_action = NULL;
c8da19b9 1660out_wait:
b75ad4cd 1661 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1662}
1663
24ac23ab
TM		 1664static void nfs4_open_done(struct rpc_task *task, void *calldata)
1665{
1666 struct nfs4_opendata *data = calldata;
1da177e4 1667
24ac23ab 1668 data->rpc_status = task->tk_status;
d898528c 1669
14516c3a
TM		 1670 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1671 return;
d898528c 1672
24ac23ab 1673 if (task->tk_status == 0) {
807d66d8
TM		 1674 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1675 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1676 case S_IFREG:
1677 break;
1678 case S_IFLNK:
24ac23ab 1679 data->rpc_status = -ELOOP;
6f926b5b
TM		 1680 break;
1681 case S_IFDIR:
24ac23ab 1682 data->rpc_status = -EISDIR;
6f926b5b
TM		 1683 break;
1684 default:
24ac23ab 1685 data->rpc_status = -ENOTDIR;
807d66d8 1686 }
6f926b5b 1687 }
26e976a8 1688 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1689 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1690 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1691 }
3e309914 1692 data->rpc_done = 1;
24ac23ab 1693}
6f926b5b 1694
24ac23ab
TM		 1695static void nfs4_open_release(void *calldata)
1696{
1697 struct nfs4_opendata *data = calldata;
1698 struct nfs4_state *state = NULL;
1699
1700 /* If this request hasn't been cancelled, do nothing */
1701 if (data->cancelled == 0)
1702 goto out_free;
1703 /* In case of error, no cleanup! */
3e309914 1704 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1705 goto out_free;
1706 /* In case we need an open_confirm, no cleanup! */
1707 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1708 goto out_free;
24ac23ab 1709 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1710 if (!IS_ERR(state))
643168c2 1711 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1712out_free:
c6d00e63 1713 nfs4_opendata_put(data);
24ac23ab
TM		 1714}
1715
1716static const struct rpc_call_ops nfs4_open_ops = {
1717 .rpc_call_prepare = nfs4_open_prepare,
1718 .rpc_call_done = nfs4_open_done,
1719 .rpc_release = nfs4_open_release,
1720};
1721
b257957e 1722static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1723{
1724 struct inode *dir = data->dir->d_inode;
1725 struct nfs_server *server = NFS_SERVER(dir);
1726 struct nfs_openargs *o_arg = &data->o_arg;
1727 struct nfs_openres *o_res = &data->o_res;
1728 struct rpc_task *task;
5138fde0
TM		 1729 struct rpc_message msg = {
1730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1731 .rpc_argp = o_arg,
1732 .rpc_resp = o_res,
1733 .rpc_cred = data->owner->so_cred,
1734 };
c970aa85
TM		 1735 struct rpc_task_setup task_setup_data = {
1736 .rpc_client = server->client,
5138fde0 1737 .rpc_message = &msg,
c970aa85
TM		 1738 .callback_ops = &nfs4_open_ops,
1739 .callback_data = data,
101070ca 1740 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1741 .flags = RPC_TASK_ASYNC,
1742 };
24ac23ab
TM		 1743 int status;
1744
9d12b216 1745 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1746 kref_get(&data->kref);
3e309914
TM		 1747 data->rpc_done = 0;
1748 data->rpc_status = 0;
2ced46c2 1749 data->cancelled = 0;
bdeca1b7
TM		 1750 data->is_recover = 0;
1751 if (isrecover) {
8fe72bac 1752 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1753 data->is_recover = 1;
1754 }
c970aa85 1755 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1756 if (IS_ERR(task))
1757 return PTR_ERR(task);
1758 status = nfs4_wait_for_completion_rpc_task(task);
1759 if (status != 0) {
1760 data->cancelled = 1;
1761 smp_wmb();
1762 } else
1763 status = data->rpc_status;
1764 rpc_put_task(task);
1765
1766 return status;
1767}
1768
1769static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1770{
1771 struct inode *dir = data->dir->d_inode;
1772 struct nfs_openres *o_res = &data->o_res;
1773 int status;
1774
1775 status = nfs4_run_open_task(data, 1);
1776 if (status != 0 || !data->rpc_done)
1777 return status;
1778
6926afd1
TM		 1779 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1780
b257957e
AB		 1781 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1782 status = _nfs4_proc_open_confirm(data);
1783 if (status != 0)
1784 return status;
1785 }
1786
1787 return status;
1788}
1789
6168f62c
WAA		 1790static int nfs4_opendata_access(struct rpc_cred *cred,
1791 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1792 struct nfs4_state *state, fmode_t fmode,
1793 int openflags)
6168f62c
WAA		 1794{
1795 struct nfs_access_entry cache;
1796 u32 mask;
1797
1798 /* access call failed or for some reason the server doesn't
1799 * support any access modes -- defer access call until later */
1800 if (opendata->o_res.access_supported == 0)
1801 return 0;
1802
1803 mask = 0;
bbd3a8ee 1804 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1805 * write mode bits, but POSIX allows the creating process to write.
1806 * use openflags to check for exec, because fmode won't
1807 * always have FMODE_EXEC set when file open for exec. */
1808 if (openflags & __FMODE_EXEC) {
1809 /* ONLY check for exec rights */
1810 mask = MAY_EXEC;
1811 } else if (fmode & FMODE_READ)
1812 mask = MAY_READ;
6168f62c
WAA		 1813
1814 cache.cred = cred;
1815 cache.jiffies = jiffies;
1816 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1817 nfs_access_add_cache(state->inode, &cache);
1818
bbd3a8ee 1819 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1820 return 0;
1821
1822 /* even though OPEN succeeded, access is denied. Close the file */
1823 nfs4_close_state(state, fmode);
998f40b5 1824 return -EACCES;
6168f62c
WAA		 1825}
1826
b257957e
AB		 1827/*
1828 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1829 */
1830static int _nfs4_proc_open(struct nfs4_opendata *data)
1831{
1832 struct inode *dir = data->dir->d_inode;
1833 struct nfs_server *server = NFS_SERVER(dir);
1834 struct nfs_openargs *o_arg = &data->o_arg;
1835 struct nfs_openres *o_res = &data->o_res;
1836 int status;
1837
1838 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1839 if (!data->rpc_done)
1840 return status;
1841 if (status != 0) {
1842 if (status == -NFS4ERR_BADNAME &&
1843 !(o_arg->open_flags & O_CREAT))
1844 return -ENOENT;
24ac23ab 1845 return status;
08ef7bd3 1846 }
24ac23ab 1847
6926afd1
TM		 1848 nfs_fattr_map_and_free_names(server, &data->f_attr);
1849
90ff0c54 1850 if (o_arg->open_flags & O_CREAT)
56ae19f3 1851 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1852 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1853 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1854 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1855 status = _nfs4_proc_open_confirm(data);
1da177e4 1856 if (status != 0)
24ac23ab 1857 return status;
1da177e4
LT		 1858 }
1859 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1860 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1861 return 0;
1da177e4
LT		 1862}
1863
d83217c1
AA		 1864static int nfs4_recover_expired_lease(struct nfs_server *server)
1865{
1866 return nfs4_client_recover_expired_lease(server->nfs_client);
1867}
1868
1da177e4
LT		 1869/*
1870 * OPEN_EXPIRED:
1871 * reclaim state on the server after a network partition.
1872 * Assumes caller holds the appropriate lock
1873 */
539cd03a 1874static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1875{
e56e0b78 1876 struct nfs4_opendata *opendata;
864472e9 1877 int ret;
1da177e4 1878
4a1c0893 1879 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1880 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1881 if (IS_ERR(opendata))
1882 return PTR_ERR(opendata);
864472e9 1883 ret = nfs4_open_recover(opendata, state);
35d05778 1884 if (ret == -ESTALE)
3d4ff43d 1885 d_drop(ctx->dentry);
c6d00e63 1886 nfs4_opendata_put(opendata);
864472e9 1887 return ret;
1da177e4
LT		 1888}
1889
a9ed2e25 1890static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1891{
539cd03a 1892 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1893 struct nfs4_exception exception = { };
1894 int err;
1895
1896 do {
539cd03a 1897 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1898 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1899 continue;
a9ed2e25
TM		 1900 switch (err) {
1901 default:
1902 goto out;
1903 case -NFS4ERR_GRACE:
1904 case -NFS4ERR_DELAY:
1905 nfs4_handle_exception(server, err, &exception);
1906 err = 0;
1907 }
202b50dc 1908 } while (exception.retry);
a9ed2e25 1909out:
202b50dc
TM		 1910 return err;
1911}
1912
1da177e4
LT		 1913static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1914{
1da177e4 1915 struct nfs_open_context *ctx;
864472e9 1916 int ret;
1da177e4 1917
864472e9
TM		 1918 ctx = nfs4_state_find_open_context(state);
1919 if (IS_ERR(ctx))
91876b13 1920 return -EAGAIN;
539cd03a 1921 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1922 put_nfs_open_context(ctx);
1923 return ret;
1da177e4
LT		 1924}
1925
f062eb6c 1926#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1927static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1928{
f062eb6c 1929 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1930 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1931 struct nfs_delegation *delegation;
1932 struct rpc_cred *cred = NULL;
1933 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1934
1935 /* If a state reset has been done, test_stateid is unneeded */
1936 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1937 return;
1938
ab7cb0df
TM		 1939 /* Get the delegation credential for use by test/free_stateid */
1940 rcu_read_lock();
1941 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1942 if (delegation != NULL &&
1943 nfs4_stateid_match(&delegation->stateid, stateid)) {
1944 cred = get_rpccred(delegation->cred);
1945 rcu_read_unlock();
1946 status = nfs41_test_stateid(server, stateid, cred);
1947 } else
1948 rcu_read_unlock();
1949
3e60ffdd
CL		 1950 if (status != NFS_OK) {
1951 /* Free the stateid unless the server explicitly
1952 * informs us the stateid is unrecognized. */
1953 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1954 nfs41_free_stateid(server, stateid, cred);
6938867e 1955 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1956
6938867e
BS		 1957 write_seqlock(&state->seqlock);
1958 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1959 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1960 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1961 }
ab7cb0df
TM		 1962
1963 if (cred != NULL)
1964 put_rpccred(cred);
3e60ffdd
CL		 1965}
1966
1967/**
1968 * nfs41_check_open_stateid - possibly free an open stateid
1969 *
1970 * @state: NFSv4 state for an inode
1971 *
1972 * Returns NFS_OK if recovery for this stateid is now finished.
1973 * Otherwise a negative NFS4ERR value is returned.
1974 */
1975static int nfs41_check_open_stateid(struct nfs4_state *state)
1976{
1977 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1978 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1979 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1980 int status;
1981
1982 /* If a state reset has been done, test_stateid is unneeded */
1983 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1984 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1985 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1986 return -NFS4ERR_BAD_STATEID;
1987
ab7cb0df 1988 status = nfs41_test_stateid(server, stateid, cred);
3e60ffdd
CL		 1989 if (status != NFS_OK) {
1990 /* Free the stateid unless the server explicitly
1991 * informs us the stateid is unrecognized. */
1992 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1993 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 1994
1995 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1996 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1997 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1998 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1999 }
2000 return status;
2001}
2002
2003static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2004{
eb64cf96 2005 int status;
b01dd1d8 2006
3e60ffdd
CL		 2007 nfs41_clear_delegation_stateid(state);
2008 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2009 if (status != NFS_OK)
2010 status = nfs4_open_expired(sp, state);
2011 return status;
f062eb6c
BS		 2012}
2013#endif
2014
aa53ed54
JL		 2015/*
2016 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2017 * fields corresponding to attributes that were used to store the verifier.
2018 * Make sure we clobber those fields in the later setattr call
2019 */
2020static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2021{
2022 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2023 !(sattr->ia_valid & ATTR_ATIME_SET))
2024 sattr->ia_valid |= ATTR_ATIME;
2025
2026 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2027 !(sattr->ia_valid & ATTR_MTIME_SET))
2028 sattr->ia_valid |= ATTR_MTIME;
2029}
2030
c21443c2
TM		 2031static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2032 fmode_t fmode,
2033 int flags,
3efb9722 2034 struct nfs_open_context *ctx)
c21443c2
TM		 2035{
2036 struct nfs4_state_owner *sp = opendata->owner;
2037 struct nfs_server *server = sp->so_server;
275bb307 2038 struct dentry *dentry;
c21443c2
TM		 2039 struct nfs4_state *state;
2040 unsigned int seq;
2041 int ret;
2042
2043 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2044
2045 ret = _nfs4_proc_open(opendata);
2046 if (ret != 0)
2047 goto out;
2048
2049 state = nfs4_opendata_to_nfs4_state(opendata);
2050 ret = PTR_ERR(state);
2051 if (IS_ERR(state))
2052 goto out;
2053 if (server->caps & NFS_CAP_POSIX_LOCK)
2054 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2055
275bb307
TM		 2056 dentry = opendata->dentry;
2057 if (dentry->d_inode == NULL) {
2058 /* FIXME: Is this d_drop() ever needed? */
2059 d_drop(dentry);
2060 dentry = d_add_unique(dentry, igrab(state->inode));
2061 if (dentry == NULL) {
2062 dentry = opendata->dentry;
2063 } else if (dentry != ctx->dentry) {
2064 dput(ctx->dentry);
2065 ctx->dentry = dget(dentry);
2066 }
2067 nfs_set_verifier(dentry,
2068 nfs_save_change_attribute(opendata->dir->d_inode));
2069 }
2070
c21443c2
TM		 2071 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2072 if (ret != 0)
2073 goto out;
2074
3efb9722 2075 ctx->state = state;
c45ffdd2
TM		 2076 if (dentry->d_inode == state->inode) {
2077 nfs_inode_attach_open_context(ctx);
2078 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2079 nfs4_schedule_stateid_recovery(server, state);
2080 }
c21443c2
TM		 2081out:
2082 return ret;
2083}
2084
1da177e4 2085/*
24ac23ab 2086 * Returns a referenced nfs4_state
1da177e4 2087 */
82be417a 2088static int _nfs4_do_open(struct inode *dir,
4197a055 2089 struct nfs_open_context *ctx,
82be417a
AA		 2090 int flags,
2091 struct iattr *sattr,
959d921f 2092 struct nfs4_label *label)
1da177e4
LT		 2093{
2094 struct nfs4_state_owner *sp;
2095 struct nfs4_state *state = NULL;
2096 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2097 struct nfs4_opendata *opendata;
4197a055
TM		 2098 struct dentry *dentry = ctx->dentry;
2099 struct rpc_cred *cred = ctx->cred;
2100 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2101 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2102 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2103 struct nfs4_label *olabel = NULL;
aac00a8d 2104 int status;
1da177e4
LT		 2105
2106 /* Protect against reboot recovery conflicts */
1da177e4 2107 status = -ENOMEM;
d1e284d5
TM		 2108 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2109 if (sp == NULL) {
1da177e4
LT		 2110 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2111 goto out_err;
2112 }
58d9714a
TM		 2113 status = nfs4_recover_expired_lease(server);
2114 if (status != 0)
b4454fe1 2115 goto err_put_state_owner;
82a2c1b7
AV		 2116 if (dentry->d_inode != NULL)
2117 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2118 status = -ENOMEM;
49f9a0fa
TM		 2119 if (dentry->d_inode)
2120 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2121 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2122 label, claim, GFP_KERNEL);
e56e0b78 2123 if (opendata == NULL)
95d35cb4 2124 goto err_put_state_owner;
1da177e4 2125
14c43f76
DQ		 2126 if (label) {
2127 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2128 if (IS_ERR(olabel)) {
2129 status = PTR_ERR(olabel);
2130 goto err_opendata_put;
2131 }
2132 }
2133
82be417a
AA		 2134 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2135 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2136 if (!opendata->f_attr.mdsthreshold)
14c43f76 2137 goto err_free_label;
1549210f 2138 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2139 }
82a2c1b7
AV		 2140 if (dentry->d_inode != NULL)
2141 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2142
3efb9722 2143 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2144 if (status != 0)
14c43f76 2145 goto err_free_label;
3efb9722 2146 state = ctx->state;
6168f62c 2147
549b19cc
TM		 2148 if ((opendata->o_arg.open_flags & O_EXCL) &&
2149 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2150 nfs4_exclusive_attrset(opendata, sattr);
2151
2152 nfs_fattr_init(opendata->o_res.f_attr);
2153 status = nfs4_do_setattr(state->inode, cred,
2154 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2155 state, label, olabel);
2156 if (status == 0) {
0ab64e0e 2157 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2158 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2159 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2160 }
0ab64e0e 2161 }
82be417a
AA		 2162
2163 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2164 *ctx_th = opendata->f_attr.mdsthreshold;
2165 else
2166 kfree(opendata->f_attr.mdsthreshold);
2167 opendata->f_attr.mdsthreshold = NULL;
2168
14c43f76
DQ		 2169 nfs4_label_free(olabel);
2170
c6d00e63 2171 nfs4_opendata_put(opendata);
1da177e4 2172 nfs4_put_state_owner(sp);
1da177e4 2173 return 0;
14c43f76
DQ		 2174err_free_label:
2175 nfs4_label_free(olabel);
c6d00e63 2176err_opendata_put:
82be417a 2177 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2178 nfs4_opendata_put(opendata);
e56e0b78
TM		 2179err_put_state_owner:
2180 nfs4_put_state_owner(sp);
1da177e4 2181out_err:
1da177e4
LT		 2182 return status;
2183}
2184
2185
82be417a 2186static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2187 struct nfs_open_context *ctx,
82be417a
AA		 2188 int flags,
2189 struct iattr *sattr,
959d921f 2190 struct nfs4_label *label)
1da177e4 2191{
49f9a0fa 2192 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2193 struct nfs4_exception exception = { };
2194 struct nfs4_state *res;
2195 int status;
2196
2197 do {
959d921f 2198 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2199 res = ctx->state;
1da177e4
LT		 2200 if (status == 0)
2201 break;
2202 /* NOTE: BAD_SEQID means the server and client disagree about the
2203 * book-keeping w.r.t. state-changing operations
2204 * (OPEN/CLOSE/LOCK/LOCKU...)
2205 * It is actually a sign of a bug on the client or on the server.
2206 *
2207 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2208 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2209 * have unhashed the old state_owner for us, and that we can
2210 * therefore safely retry using a new one. We should still warn
2211 * the user though...
2212 */
2213 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2214 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2215 " returned a bad sequence-id error!\n",
2216 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2217 exception.retry = 1;
2218 continue;
2219 }
550f5747
TM		 2220 /*
2221 * BAD_STATEID on OPEN means that the server cancelled our
2222 * state before it received the OPEN_CONFIRM.
2223 * Recover by retrying the request as per the discussion
2224 * on Page 181 of RFC3530.
2225 */
2226 if (status == -NFS4ERR_BAD_STATEID) {
2227 exception.retry = 1;
2228 continue;
2229 }
aac00a8d
TM		 2230 if (status == -EAGAIN) {
2231 /* We must have found a delegation */
2232 exception.retry = 1;
2233 continue;
2234 }
49f9a0fa
TM		 2235 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2236 continue;
2237 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2238 status, &exception));
2239 } while (exception.retry);
2240 return res;
2241}
2242
659bfcd6
TM		 2243static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2244 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2245 struct nfs4_state *state, struct nfs4_label *ilabel,
2246 struct nfs4_label *olabel)
1da177e4 2247{
3e4f6290 2248 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2249 struct nfs_setattrargs arg = {
3e4f6290 2250 .fh = NFS_FH(inode),
1da177e4
LT		 2251 .iap = sattr,
2252 .server = server,
2253 .bitmask = server->attr_bitmask,
1775fd3e 2254 .label = ilabel,
1da177e4
LT		 2255 };
2256 struct nfs_setattrres res = {
2257 .fattr = fattr,
1775fd3e 2258 .label = olabel,
1da177e4
LT		 2259 .server = server,
2260 };
2261 struct rpc_message msg = {
659bfcd6
TM		 2262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2263 .rpc_argp = &arg,
2264 .rpc_resp = &res,
2265 .rpc_cred = cred,
1da177e4 2266 };
26e976a8 2267 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2268 fmode_t fmode;
2269 bool truncate;
65e4308d 2270 int status;
1da177e4 2271
aa9c2669
DQ		 2272 arg.bitmask = nfs4_bitmask(server, ilabel);
2273 if (ilabel)
2274 arg.bitmask = nfs4_bitmask(server, olabel);
2275
0e574af1 2276 nfs_fattr_init(fattr);
1da177e4 2277
ee3ae84e
TM		 2278 /* Servers should only apply open mode checks for file size changes */
2279 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2280 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2281
2282 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2283 /* Use that stateid */
2284 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2285 struct nfs_lockowner lockowner = {
2286 .l_owner = current->files,
2287 .l_pid = current->tgid,
2288 };
4fc8796d 2289 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2290 &lockowner);
08e9eac4 2291 } else
f597c537 2292 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2293
7c513058 2294 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2295 if (status == 0 && state != NULL)
2296 renew_lease(server, timestamp);
65e4308d 2297 return status;
1da177e4
LT		 2298}
2299
659bfcd6
TM		 2300static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2301 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2302 struct nfs4_state *state, struct nfs4_label *ilabel,
2303 struct nfs4_label *olabel)
1da177e4 2304{
3e4f6290 2305 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2306 struct nfs4_exception exception = {
2307 .state = state,
3114ea7a 2308 .inode = inode,
a1d0b5ee 2309 };
1da177e4
LT		 2310 int err;
2311 do {
1775fd3e 2312 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2313 switch (err) {
2314 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2315 if (!(sattr->ia_valid & ATTR_SIZE)) {
2316 pr_warn_once("NFSv4: server %s is incorrectly "
2317 "applying open mode checks to "
2318 "a SETATTR that is not "
2319 "changing file size.\n",
2320 server->nfs_client->cl_hostname);
2321 }
451146be
TM		 2322 if (state && !(state->state & FMODE_WRITE)) {
2323 err = -EBADF;
2324 if (sattr->ia_valid & ATTR_OPEN)
2325 err = -EACCES;
2326 goto out;
2327 }
2328 }
2329 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2330 } while (exception.retry);
451146be 2331out:
1da177e4
LT		 2332 return err;
2333}
2334
2335struct nfs4_closedata {
2336 struct inode *inode;
2337 struct nfs4_state *state;
2338 struct nfs_closeargs arg;
2339 struct nfs_closeres res;
516a6af6 2340 struct nfs_fattr fattr;
26e976a8 2341 unsigned long timestamp;
f7e8917a
FI		 2342 bool roc;
2343 u32 roc_barrier;
1da177e4
LT		 2344};
2345
963d8fe5 2346static void nfs4_free_closedata(void *data)
9512135d 2347{
963d8fe5
TM		 2348 struct nfs4_closedata *calldata = data;
2349 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2350 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2351
f7e8917a
FI		 2352 if (calldata->roc)
2353 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2354 nfs4_put_open_state(calldata->state);
2355 nfs_free_seqid(calldata->arg.seqid);
9512135d 2356 nfs4_put_state_owner(sp);
322b2b90 2357 nfs_sb_deactive(sb);
9512135d
TM		 2358 kfree(calldata);
2359}
2360
88069f77
TM		 2361static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2362 fmode_t fmode)
2363{
2364 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2365 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2366 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2367 case FMODE_WRITE:
88069f77 2368 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2369 break;
2370 case FMODE_READ:
88069f77 2371 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2372 break;
2373 case 0:
2374 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2375 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2376 clear_bit(NFS_OPEN_STATE, &state->flags);
2377 }
88069f77
TM		 2378 spin_unlock(&state->owner->so_lock);
2379}
2380
963d8fe5 2381static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2382{
963d8fe5 2383 struct nfs4_closedata *calldata = data;
1da177e4 2384 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2385 struct nfs_server *server = NFS_SERVER(calldata->inode);
2386
a3ca5651 2387 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2388 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2389 return;
1da177e4
LT		 2390 /* hmm. we are done with the inode, and in the process of freeing
2391 * the state_owner. we keep this around to process errors
2392 */
1da177e4
LT		 2393 switch (task->tk_status) {
2394 case 0:
f7e8917a
FI		 2395 if (calldata->roc)
2396 pnfs_roc_set_barrier(state->inode,
2397 calldata->roc_barrier);
45328c35 2398 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2399 renew_lease(server, calldata->timestamp);
88069f77
TM		 2400 nfs4_close_clear_stateid_flags(state,
2401 calldata->arg.fmode);
1da177e4
LT		 2402 break;
2403 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2404 case -NFS4ERR_OLD_STATEID:
2405 case -NFS4ERR_BAD_STATEID:
1da177e4 2406 case -NFS4ERR_EXPIRED:
dc0b027d 2407 if (calldata->arg.fmode == 0)
9e33bed5 2408 break;
1da177e4 2409 default:
72211dbe
TM		 2410 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2411 rpc_restart_call_prepare(task);
1da177e4 2412 }
72211dbe 2413 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2414 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2415 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2416}
2417
4ce70ada 2418static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2419{
4ce70ada 2420 struct nfs4_closedata *calldata = data;
9512135d 2421 struct nfs4_state *state = calldata->state;
7fdab069 2422 struct inode *inode = calldata->inode;
88069f77 2423 int call_close = 0;
9512135d 2424
a3ca5651 2425 dprintk("%s: begin!\n", __func__);
963d8fe5 2426 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2427 goto out_wait;
003707c7 2428
88069f77
TM		 2429 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2430 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2431 spin_lock(&state->owner->so_lock);
003707c7 2432 /* Calculate the change in open mode */
e7616923 2433 if (state->n_rdwr == 0) {
003707c7 2434 if (state->n_rdonly == 0) {
88069f77
TM		 2435 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2436 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2437 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2438 }
2439 if (state->n_wronly == 0) {
88069f77
TM		 2440 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2441 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2442 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2443 }
e7616923 2444 }
5d422301
TM		 2445 if (!nfs4_valid_open_stateid(state))
2446 call_close = 0;
4cecb76f 2447 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2448
2449 if (!call_close) {
963d8fe5 2450 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2451 goto out_no_action;
9512135d 2452 }
88069f77 2453
f7e8917a 2454 if (calldata->arg.fmode == 0) {
88069f77 2455 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2456 if (calldata->roc &&
b9536ad5
AA		 2457 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2458 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2459 goto out_wait;
b9536ad5 2460 }
f7e8917a 2461 }
88069f77 2462
516a6af6 2463 nfs_fattr_init(calldata->res.fattr);
26e976a8 2464 calldata->timestamp = jiffies;
7fdab069 2465 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2466 &calldata->arg.seq_args,
2467 &calldata->res.seq_res,
2240a9e2
TM		 2468 task) != 0)
2469 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2470 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2471 return;
2472out_no_action:
2473 task->tk_action = NULL;
2474out_wait:
2475 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2476}
2477
963d8fe5 2478static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2479 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2480 .rpc_call_done = nfs4_close_done,
2481 .rpc_release = nfs4_free_closedata,
2482};
2483
1da177e4
LT		 2484/*
2485 * It is possible for data to be read/written from a mem-mapped file
2486 * after the sys_close call (which hits the vfs layer as a flush).
2487 * This means that we can't safely call nfsv4 close on a file until
2488 * the inode is cleared. This in turn means that we are not good
2489 * NFSv4 citizens - we do not indicate to the server to update the file's
2490 * share state even when we are done with one of the three share
2491 * stateid's in the inode.
2492 *
2493 * NOTE: Caller must be holding the sp->so_owner semaphore!
2494 */
1f7977c1 2495int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2496{
4a35bd41 2497 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2498 struct nfs4_closedata *calldata;
b39e625b
TM		 2499 struct nfs4_state_owner *sp = state->owner;
2500 struct rpc_task *task;
5138fde0
TM		 2501 struct rpc_message msg = {
2502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2503 .rpc_cred = state->owner->so_cred,
2504 };
c970aa85
TM		 2505 struct rpc_task_setup task_setup_data = {
2506 .rpc_client = server->client,
5138fde0 2507 .rpc_message = &msg,
c970aa85 2508 .callback_ops = &nfs4_close_ops,
101070ca 2509 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2510 .flags = RPC_TASK_ASYNC,
2511 };
9512135d 2512 int status = -ENOMEM;
1da177e4 2513
8535b2be 2514 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2515 if (calldata == NULL)
9512135d 2516 goto out;
9d12b216 2517 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2518 calldata->inode = state->inode;
1da177e4 2519 calldata->state = state;
4a35bd41 2520 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2521 calldata->arg.stateid = &state->open_stateid;
1da177e4 2522 /* Serialization for the sequence id */
8535b2be 2523 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2524 if (calldata->arg.seqid == NULL)
2525 goto out_free_calldata;
dc0b027d 2526 calldata->arg.fmode = 0;
a65318bf 2527 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2528 calldata->res.fattr = &calldata->fattr;
c1d51931 2529 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2530 calldata->res.server = server;
1f7977c1 2531 calldata->roc = pnfs_roc(state->inode);
643168c2 2532 nfs_sb_active(calldata->inode->i_sb);
9512135d 2533
1174dd1f
TM		 2534 msg.rpc_argp = &calldata->arg;
2535 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2536 task_setup_data.callback_data = calldata;
2537 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2538 if (IS_ERR(task))
2539 return PTR_ERR(task);
a49c3c77
TM		 2540 status = 0;
2541 if (wait)
2542 status = rpc_wait_for_completion_task(task);
b39e625b 2543 rpc_put_task(task);
a49c3c77 2544 return status;
9512135d
TM		 2545out_free_calldata:
2546 kfree(calldata);
2547out:
b39e625b
TM		 2548 nfs4_put_open_state(state);
2549 nfs4_put_state_owner(sp);
9512135d 2550 return status;
1da177e4
LT		 2551}
2552
2b484297 2553static struct inode *
cd9a1c0e 2554nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2555{
1da177e4 2556 struct nfs4_state *state;
aa9c2669
DQ		 2557 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2558
2559 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2560
565277f6 2561 /* Protect against concurrent sillydeletes */
959d921f 2562 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2563
2564 nfs4_label_release_security(label);
2565
f46e0bd3
TM		 2566 if (IS_ERR(state))
2567 return ERR_CAST(state);
275bb307 2568 return state->inode;
1da177e4
LT		 2569}
2570
1185a552 2571static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2572{
2573 if (ctx->state == NULL)
2574 return;
2575 if (is_sync)
643168c2 2576 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2577 else
643168c2 2578 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2579}
1da177e4
LT		 2580
2581static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2582{
43652ad5
BH		 2583 struct nfs4_server_caps_arg args = {
2584 .fhandle = fhandle,
2585 };
1da177e4
LT		 2586 struct nfs4_server_caps_res res = {};
2587 struct rpc_message msg = {
2588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2589 .rpc_argp = &args,
1da177e4
LT		 2590 .rpc_resp = &res,
2591 };
2592 int status;
2593
7c513058 2594 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2595 if (status == 0) {
2596 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2597 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2598 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2599 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2600 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2601 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2602 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2603 server->caps |= NFS_CAP_ACLS;
2604 if (res.has_links != 0)
2605 server->caps |= NFS_CAP_HARDLINKS;
2606 if (res.has_symlinks != 0)
2607 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2608 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2609 server->caps |= NFS_CAP_FILEID;
2610 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2611 server->caps |= NFS_CAP_MODE;
2612 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2613 server->caps |= NFS_CAP_NLINK;
2614 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2615 server->caps |= NFS_CAP_OWNER;
2616 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2617 server->caps |= NFS_CAP_OWNER_GROUP;
2618 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2619 server->caps |= NFS_CAP_ATIME;
2620 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2621 server->caps |= NFS_CAP_CTIME;
2622 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2623 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2624#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2625 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2626 server->caps |= NFS_CAP_SECURITY_LABEL;
2627#endif
2628 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2629 sizeof(server->attr_bitmask));
62ab460c 2630
aa9c2669
DQ		 2631 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2632 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2633 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2634 }
a65318bf
TM		 2635 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2636 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2637 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2638 server->acl_bitmask = res.acl_bitmask;
264e6351 2639 server->fh_expire_type = res.fh_expire_type;
1da177e4 2640 }
cccef3b9 2641
1da177e4
LT		 2642 return status;
2643}
2644
55a97593 2645int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2646{
2647 struct nfs4_exception exception = { };
2648 int err;
2649 do {
2650 err = nfs4_handle_exception(server,
2651 _nfs4_server_capabilities(server, fhandle),
2652 &exception);
2653 } while (exception.retry);
2654 return err;
2655}
2656
2657static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2658 struct nfs_fsinfo *info)
2659{
aa9c2669 2660 u32 bitmask[3];
1da177e4 2661 struct nfs4_lookup_root_arg args = {
aa9c2669 2662 .bitmask = bitmask,
1da177e4
LT		 2663 };
2664 struct nfs4_lookup_res res = {
2665 .server = server,
0e574af1 2666 .fattr = info->fattr,
1da177e4
LT		 2667 .fh = fhandle,
2668 };
2669 struct rpc_message msg = {
2670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2671 .rpc_argp = &args,
2672 .rpc_resp = &res,
2673 };
008f55d0 2674
aa9c2669
DQ		 2675 bitmask[0] = nfs4_fattr_bitmap[0];
2676 bitmask[1] = nfs4_fattr_bitmap[1];
2677 /*
2678 * Process the label in the upcoming getfattr
2679 */
2680 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2681
0e574af1 2682 nfs_fattr_init(info->fattr);
7c513058 2683 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2684}
2685
2686static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2687 struct nfs_fsinfo *info)
2688{
2689 struct nfs4_exception exception = { };
2690 int err;
2691 do {
fb8a5ba8
BS		 2692 err = _nfs4_lookup_root(server, fhandle, info);
2693 switch (err) {
2694 case 0:
2695 case -NFS4ERR_WRONGSEC:
05e9cfb4 2696 goto out;
fb8a5ba8
BS		 2697 default:
2698 err = nfs4_handle_exception(server, err, &exception);
2699 }
1da177e4 2700 } while (exception.retry);
05e9cfb4 2701out:
1da177e4
LT		 2702 return err;
2703}
2704
8f70e95f
BS		 2705static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2706 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2707{
2708 struct rpc_auth *auth;
2709 int ret;
2710
2711 auth = rpcauth_create(flavor, server->client);
e8d920c5 2712 if (IS_ERR(auth)) {
75bc8821 2713 ret = -EACCES;
8f70e95f
BS		 2714 goto out;
2715 }
2716 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2717out:
2718 return ret;
2719}
2720
9a744ba3
CL		 2721/*
2722 * Retry pseudoroot lookup with various security flavors. We do this when:
2723 *
2724 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2725 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2726 *
2727 * Returns zero on success, or a negative NFS4ERR value, or a
2728 * negative errno value.
2729 */
801a16dc 2730static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2731 struct nfs_fsinfo *info)
1da177e4 2732{
9a744ba3
CL		 2733 /* Per 3530bis 15.33.5 */
2734 static const rpc_authflavor_t flav_array[] = {
2735 RPC_AUTH_GSS_KRB5P,
2736 RPC_AUTH_GSS_KRB5I,
2737 RPC_AUTH_GSS_KRB5,
c4eafe11 2738 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2739 RPC_AUTH_NULL,
2740 };
2741 int status = -EPERM;
2742 size_t i;
6a1a1e34 2743
9a744ba3 2744 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2745 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2746 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2747 continue;
2748 break;
8f70e95f 2749 }
9a744ba3 2750
fb8a5ba8
BS		 2751 /*
2752 * -EACCESS could mean that the user doesn't have correct permissions
2753 * to access the mount. It could also mean that we tried to mount
2754 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2755 * existing mount programs don't handle -EACCES very well so it should
2756 * be mapped to -EPERM instead.
2757 */
2758 if (status == -EACCES)
2759 status = -EPERM;
801a16dc
BS		 2760 return status;
2761}
2762
2ed4b95b
CL		 2763static int nfs4_do_find_root_sec(struct nfs_server *server,
2764 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2765{
2766 int mv = server->nfs_client->cl_minorversion;
2767 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2768}
2769
2770/**
2771 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2772 * @server: initialized nfs_server handle
2773 * @fhandle: we fill in the pseudo-fs root file handle
2774 * @info: we fill in an FSINFO struct
2775 *
2776 * Returns zero on success, or a negative errno.
801a16dc 2777 */
3028eb2b
BS		 2778int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2779 struct nfs_fsinfo *info)
801a16dc 2780{
2ed4b95b
CL		 2781 int status;
2782
2783 status = nfs4_lookup_root(server, fhandle, info);
2784 if ((status == -NFS4ERR_WRONGSEC) &&
2785 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2786 status = nfs4_do_find_root_sec(server, fhandle, info);
2787
1da177e4
LT		 2788 if (status == 0)
2789 status = nfs4_server_capabilities(server, fhandle);
2790 if (status == 0)
2791 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2792
c12e87f4 2793 return nfs4_map_errors(status);
1da177e4
LT		 2794}
2795
bae36241
BS		 2796static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2797 struct nfs_fsinfo *info)
2798{
2799 int error;
2800 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2801 struct nfs4_label *label = NULL;
bae36241
BS		 2802
2803 error = nfs4_server_capabilities(server, mntfh);
2804 if (error < 0) {
2805 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2806 return error;
2807 }
2808
14c43f76
DQ		 2809 label = nfs4_label_alloc(server, GFP_KERNEL);
2810 if (IS_ERR(label))
2811 return PTR_ERR(label);
2812
1775fd3e 2813 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2814 if (error < 0) {
2815 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2816 goto err_free_label;
bae36241
BS		 2817 }
2818
2819 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2820 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2821 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2822
14c43f76
DQ		 2823err_free_label:
2824 nfs4_label_free(label);
2825
bae36241
BS		 2826 return error;
2827}
2828
6b97fd3d
MN		 2829/*
2830 * Get locations and (maybe) other attributes of a referral.
2831 * Note that we'll actually follow the referral later when
2832 * we detect fsid mismatch in inode revalidation
2833 */
f05d147f
BS		 2834static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2835 const struct qstr *name, struct nfs_fattr *fattr,
2836 struct nfs_fh *fhandle)
6b97fd3d
MN		 2837{
2838 int status = -ENOMEM;
2839 struct page *page = NULL;
2840 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2841
2842 page = alloc_page(GFP_KERNEL);
2843 if (page == NULL)
2844 goto out;
2845 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2846 if (locations == NULL)
2847 goto out;
2848
f05d147f 2849 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2850 if (status != 0)
2851 goto out;
2852 /* Make sure server returned a different fsid for the referral */
2853 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2854 dprintk("%s: server did not return a different fsid for"
2855 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2856 status = -EIO;
2857 goto out;
2858 }
533eb461
AA		 2859 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2860 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2861
533eb461 2862 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2863 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2864 memset(fhandle, 0, sizeof(struct nfs_fh));
2865out:
2866 if (page)
2867 __free_page(page);
5d7ca35a 2868 kfree(locations);
6b97fd3d
MN		 2869 return status;
2870}
2871
1775fd3e
DQ		 2872static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2873 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2874{
2875 struct nfs4_getattr_arg args = {
2876 .fh = fhandle,
2877 .bitmask = server->attr_bitmask,
2878 };
2879 struct nfs4_getattr_res res = {
2880 .fattr = fattr,
1775fd3e 2881 .label = label,
1da177e4
LT		 2882 .server = server,
2883 };
2884 struct rpc_message msg = {
2885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2886 .rpc_argp = &args,
2887 .rpc_resp = &res,
2888 };
aa9c2669
DQ		 2889
2890 args.bitmask = nfs4_bitmask(server, label);
2891
0e574af1 2892 nfs_fattr_init(fattr);
7c513058 2893 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2894}
2895
1775fd3e
DQ		 2896static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2897 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2898{
2899 struct nfs4_exception exception = { };
2900 int err;
2901 do {
2902 err = nfs4_handle_exception(server,
1775fd3e 2903 _nfs4_proc_getattr(server, fhandle, fattr, label),
1da177e4
LT		 2904 &exception);
2905 } while (exception.retry);
2906 return err;
2907}
2908
2909/*
2910 * The file is not closed if it is opened due to the a request to change
2911 * the size of the file. The open call will not be needed once the
2912 * VFS layer lookup-intents are implemented.
2913 *
2914 * Close is called when the inode is destroyed.
2915 * If we haven't opened the file for O_WRONLY, we
2916 * need to in the size_change case to obtain a stateid.
2917 *
2918 * Got race?
2919 * Because OPEN is always done by name in nfsv4, it is
2920 * possible that we opened a different file by the same
2921 * name. We can recognize this race condition, but we
2922 * can't do anything about it besides returning an error.
2923 *
2924 * This will be fixed with VFS changes (lookup-intent).
2925 */
2926static int
2927nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2928 struct iattr *sattr)
2929{
08e9eac4 2930 struct inode *inode = dentry->d_inode;
659bfcd6 2931 struct rpc_cred *cred = NULL;
d530838b 2932 struct nfs4_state *state = NULL;
14c43f76 2933 struct nfs4_label *label = NULL;
1da177e4
LT		 2934 int status;
2935
8a1636c4 2936 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2937 pnfs_commit_and_return_layout(inode);
8a1636c4 2938
0e574af1 2939 nfs_fattr_init(fattr);
1da177e4 2940
2669940d
AA		 2941 /* Deal with open(O_TRUNC) */
2942 if (sattr->ia_valid & ATTR_OPEN)
2943 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2944
2945 /* Optimization: if the end result is no change, don't RPC */
2946 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2947 return 0;
2948
d530838b 2949 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2950 if (sattr->ia_valid & ATTR_FILE) {
2951 struct nfs_open_context *ctx;
2952
2953 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2954 if (ctx) {
2955 cred = ctx->cred;
2956 state = ctx->state;
2957 }
659bfcd6 2958 }
08e9eac4 2959
14c43f76
DQ		 2960 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2961 if (IS_ERR(label))
2962 return PTR_ERR(label);
2963
2964 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2965 if (status == 0) {
65e4308d 2966 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2967 nfs_setsecurity(inode, fattr, label);
2968 }
14c43f76 2969 nfs4_label_free(label);
1da177e4
LT		 2970 return status;
2971}
2972
0c2e53f1
TM		 2973static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2974 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2975 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2976{
0c2e53f1 2977 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2978 int status;
2979 struct nfs4_lookup_arg args = {
2980 .bitmask = server->attr_bitmask,
0c2e53f1 2981 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2982 .name = name,
2983 };
2984 struct nfs4_lookup_res res = {
2985 .server = server,
2986 .fattr = fattr,
aa9c2669 2987 .label = label,
2b3de441
DH		 2988 .fh = fhandle,
2989 };
2990 struct rpc_message msg = {
2991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2992 .rpc_argp = &args,
2993 .rpc_resp = &res,
2994 };
2995
aa9c2669
DQ		 2996 args.bitmask = nfs4_bitmask(server, label);
2997
2b3de441
DH		 2998 nfs_fattr_init(fattr);
2999
1da177e4 3000 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3001 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3002 dprintk("NFS reply lookup: %d\n", status);
3003 return status;
3004}
3005
72de53ec 3006static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3007{
7ebb9315 3008 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3009 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3010 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3011 fattr->nlink = 2;
3012}
3013
72de53ec
BS		 3014static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3015 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3016 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3017{
3018 struct nfs4_exception exception = { };
72de53ec 3019 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3020 int err;
3021 do {
1775fd3e 3022 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
72de53ec 3023 switch (err) {
08ef7bd3 3024 case -NFS4ERR_BADNAME:
72de53ec
BS		 3025 err = -ENOENT;
3026 goto out;
0c2e53f1 3027 case -NFS4ERR_MOVED:
f05d147f 3028 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3029 goto out;
0c2e53f1 3030 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3031 err = -EPERM;
3032 if (client != *clnt)
3033 goto out;
3034
3035 client = nfs4_create_sec_client(client, dir, name);
3036 if (IS_ERR(client))
3037 return PTR_ERR(client);
3038
3039 exception.retry = 1;
3040 break;
3041 default:
3042 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3043 }
1da177e4 3044 } while (exception.retry);
72de53ec
BS		 3045
3046out:
3047 if (err == 0)
3048 *clnt = client;
3049 else if (client != *clnt)
3050 rpc_shutdown_client(client);
3051
1da177e4
LT		 3052 return err;
3053}
3054
80a16b21 3055static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3056 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3057 struct nfs4_label *label)
72de53ec
BS		 3058{
3059 int status;
3060 struct rpc_clnt *client = NFS_CLIENT(dir);
3061
1775fd3e 3062 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3063 if (client != NFS_CLIENT(dir)) {
3064 rpc_shutdown_client(client);
3065 nfs_fixup_secinfo_attributes(fattr);
3066 }
3067 return status;
3068}
3069
f05d147f
BS		 3070struct rpc_clnt *
3071nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3072 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3073{
3074 int status;
3075 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3076
1775fd3e 3077 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3078 if (status < 0) {
3079 rpc_shutdown_client(client);
3080 return ERR_PTR(status);
3081 }
3082 return client;
3083}
3084
1da177e4
LT		 3085static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3086{
76b32999 3087 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3088 struct nfs4_accessargs args = {
3089 .fh = NFS_FH(inode),
a4980e78 3090 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3091 };
3092 struct nfs4_accessres res = {
3093 .server = server,
1da177e4 3094 };
1da177e4
LT		 3095 struct rpc_message msg = {
3096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3097 .rpc_argp = &args,
3098 .rpc_resp = &res,
3099 .rpc_cred = entry->cred,
3100 };
3101 int mode = entry->mask;
aa9c2669 3102 int status = 0;
1da177e4
LT		 3103
3104 /*
3105 * Determine which access bits we want to ask for...
3106 */
3107 if (mode & MAY_READ)
3108 args.access |= NFS4_ACCESS_READ;
3109 if (S_ISDIR(inode->i_mode)) {
3110 if (mode & MAY_WRITE)
3111 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3112 if (mode & MAY_EXEC)
3113 args.access |= NFS4_ACCESS_LOOKUP;
3114 } else {
3115 if (mode & MAY_WRITE)
3116 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3117 if (mode & MAY_EXEC)
3118 args.access |= NFS4_ACCESS_EXECUTE;
3119 }
c407d41a
TM		 3120
3121 res.fattr = nfs_alloc_fattr();
3122 if (res.fattr == NULL)
3123 return -ENOMEM;
3124
7c513058 3125 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3126 if (!status) {
6168f62c 3127 nfs_access_set_mask(entry, res.access);
c407d41a 3128 nfs_refresh_inode(inode, res.fattr);
1da177e4 3129 }
c407d41a 3130 nfs_free_fattr(res.fattr);
1da177e4
LT		 3131 return status;
3132}
3133
3134static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3135{
3136 struct nfs4_exception exception = { };
3137 int err;
3138 do {
3139 err = nfs4_handle_exception(NFS_SERVER(inode),
3140 _nfs4_proc_access(inode, entry),
3141 &exception);
3142 } while (exception.retry);
3143 return err;
3144}
3145
3146/*
3147 * TODO: For the time being, we don't try to get any attributes
3148 * along with any of the zero-copy operations READ, READDIR,
3149 * READLINK, WRITE.
3150 *
3151 * In the case of the first three, we want to put the GETATTR
3152 * after the read-type operation -- this is because it is hard
3153 * to predict the length of a GETATTR response in v4, and thus
3154 * align the READ data correctly. This means that the GETATTR
3155 * may end up partially falling into the page cache, and we should
3156 * shift it into the 'tail' of the xdr_buf before processing.
3157 * To do this efficiently, we need to know the total length
3158 * of data received, which doesn't seem to be available outside
3159 * of the RPC layer.
3160 *
3161 * In the case of WRITE, we also want to put the GETATTR after
3162 * the operation -- in this case because we want to make sure
140150db 3163 * we get the post-operation mtime and size.
1da177e4
LT		 3164 *
3165 * Both of these changes to the XDR layer would in fact be quite
3166 * minor, but I decided to leave them for a subsequent patch.
3167 */
3168static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3169 unsigned int pgbase, unsigned int pglen)
3170{
3171 struct nfs4_readlink args = {
3172 .fh = NFS_FH(inode),
3173 .pgbase = pgbase,
3174 .pglen = pglen,
3175 .pages = &page,
3176 };
f50c7000 3177 struct nfs4_readlink_res res;
1da177e4
LT		 3178 struct rpc_message msg = {
3179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3180 .rpc_argp = &args,
f50c7000 3181 .rpc_resp = &res,
1da177e4
LT		 3182 };
3183
7c513058 3184 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3185}
3186
3187static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3188 unsigned int pgbase, unsigned int pglen)
3189{
3190 struct nfs4_exception exception = { };
3191 int err;
3192 do {
3193 err = nfs4_handle_exception(NFS_SERVER(inode),
3194 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3195 &exception);
3196 } while (exception.retry);
3197 return err;
3198}
3199
1da177e4 3200/*
8867fe58 3201 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3202 */
1da177e4
LT		 3203static int
3204nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3205 int flags)
1da177e4 3206{
aa9c2669 3207 struct nfs4_label l, *ilabel = NULL;
8867fe58 3208 struct nfs_open_context *ctx;
1da177e4 3209 struct nfs4_state *state;
1da177e4
LT		 3210 int status = 0;
3211
8867fe58
MS		 3212 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3213 if (IS_ERR(ctx))
3214 return PTR_ERR(ctx);
3215
aa9c2669
DQ		 3216 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3217
a8a5da99 3218 sattr->ia_mode &= ~current_umask();
959d921f 3219 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3220 if (IS_ERR(state)) {
3221 status = PTR_ERR(state);
c0204fd2 3222 goto out;
1da177e4 3223 }
1da177e4 3224out:
aa9c2669 3225 nfs4_label_release_security(ilabel);
8867fe58 3226 put_nfs_open_context(ctx);
1da177e4
LT		 3227 return status;
3228}
3229
3230static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3231{
16e42959 3232 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3233 struct nfs_removeargs args = {
1da177e4 3234 .fh = NFS_FH(dir),
26fe5750 3235 .name = *name,
16e42959 3236 };
4fdc17b2 3237 struct nfs_removeres res = {
16e42959 3238 .server = server,
1da177e4 3239 };
1da177e4 3240 struct rpc_message msg = {
4fdc17b2
TM		 3241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3242 .rpc_argp = &args,
3243 .rpc_resp = &res,
1da177e4 3244 };
778d2817 3245 int status;
1da177e4 3246
7c513058 3247 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3248 if (status == 0)
16e42959 3249 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3250 return status;
3251}
3252
3253static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3254{
3255 struct nfs4_exception exception = { };
3256 int err;
3257 do {
3258 err = nfs4_handle_exception(NFS_SERVER(dir),
3259 _nfs4_proc_remove(dir, name),
3260 &exception);
3261 } while (exception.retry);
3262 return err;
3263}
3264
e4eff1a6 3265static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3266{
e4eff1a6
TM		 3267 struct nfs_server *server = NFS_SERVER(dir);
3268 struct nfs_removeargs *args = msg->rpc_argp;
3269 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3270
e4eff1a6 3271 res->server = server;
1da177e4 3272 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3273 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3274
3275 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3276}
3277
34e137cc
BS		 3278static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3279{
d9afbd1b
TM		 3280 nfs4_setup_sequence(NFS_SERVER(data->dir),
3281 &data->args.seq_args,
3282 &data->res.seq_res,
3283 task);
1da177e4
LT		 3284}
3285
e4eff1a6 3286static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3287{
e4eff1a6
TM		 3288 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3289
14516c3a
TM		 3290 if (!nfs4_sequence_done(task, &res->seq_res))
3291 return 0;
9e33bed5 3292 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3293 return 0;
3294 update_changeattr(dir, &res->cinfo);
e4eff1a6 3295 return 1;
1da177e4
LT		 3296}
3297
d3d4152a
JL		 3298static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3299{
3300 struct nfs_server *server = NFS_SERVER(dir);
3301 struct nfs_renameargs *arg = msg->rpc_argp;
3302 struct nfs_renameres *res = msg->rpc_resp;
3303
3304 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3305 res->server = server;
9d12b216 3306 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3307}
3308
c6bfa1a1
BS		 3309static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3310{
d9afbd1b
TM		 3311 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3312 &data->args.seq_args,
3313 &data->res.seq_res,
3314 task);
d3d4152a
JL		 3315}
3316
3317static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3318 struct inode *new_dir)
3319{
3320 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3321
3322 if (!nfs4_sequence_done(task, &res->seq_res))
3323 return 0;
3324 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3325 return 0;
3326
3327 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3328 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3329 return 1;
3330}
3331
1da177e4
LT		 3332static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3333 struct inode *new_dir, struct qstr *new_name)
3334{
6caf2c82 3335 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3336 struct nfs_renameargs arg = {
1da177e4
LT		 3337 .old_dir = NFS_FH(old_dir),
3338 .new_dir = NFS_FH(new_dir),
3339 .old_name = old_name,
3340 .new_name = new_name,
6caf2c82 3341 };
e8582a8b 3342 struct nfs_renameres res = {
6caf2c82 3343 .server = server,
1da177e4 3344 };
1da177e4
LT		 3345 struct rpc_message msg = {
3346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3347 .rpc_argp = &arg,
3348 .rpc_resp = &res,
3349 };
011fff72 3350 int status = -ENOMEM;
14c43f76 3351
7c513058 3352 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3353 if (!status) {
3354 update_changeattr(old_dir, &res.old_cinfo);
3355 update_changeattr(new_dir, &res.new_cinfo);
3356 }
3357 return status;
3358}
3359
3360static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3361 struct inode *new_dir, struct qstr *new_name)
3362{
3363 struct nfs4_exception exception = { };
3364 int err;
3365 do {
3366 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3367 _nfs4_proc_rename(old_dir, old_name,
3368 new_dir, new_name),
3369 &exception);
3370 } while (exception.retry);
3371 return err;
3372}
3373
3374static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3375{
91ba2eee 3376 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3377 struct nfs4_link_arg arg = {
3378 .fh = NFS_FH(inode),
3379 .dir_fh = NFS_FH(dir),
3380 .name = name,
91ba2eee
TM		 3381 .bitmask = server->attr_bitmask,
3382 };
91ba2eee
TM		 3383 struct nfs4_link_res res = {
3384 .server = server,
1775fd3e 3385 .label = NULL,
1da177e4 3386 };
1da177e4
LT		 3387 struct rpc_message msg = {
3388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3389 .rpc_argp = &arg,
91ba2eee 3390 .rpc_resp = &res,
1da177e4 3391 };
136f2627
TM		 3392 int status = -ENOMEM;
3393
3394 res.fattr = nfs_alloc_fattr();
778d2817 3395 if (res.fattr == NULL)
136f2627 3396 goto out;
1da177e4 3397
14c43f76
DQ		 3398 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3399 if (IS_ERR(res.label)) {
3400 status = PTR_ERR(res.label);
3401 goto out;
3402 }
aa9c2669 3403 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3404
7c513058 3405 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3406 if (!status) {
3407 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3408 status = nfs_post_op_update_inode(inode, res.fattr);
3409 if (!status)
3410 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3411 }
14c43f76
DQ		 3412
3413
3414 nfs4_label_free(res.label);
3415
136f2627 3416out:
136f2627 3417 nfs_free_fattr(res.fattr);
1da177e4
LT		 3418 return status;
3419}
3420
3421static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3422{
3423 struct nfs4_exception exception = { };
3424 int err;
3425 do {
3426 err = nfs4_handle_exception(NFS_SERVER(inode),
3427 _nfs4_proc_link(inode, dir, name),
3428 &exception);
3429 } while (exception.retry);
3430 return err;
3431}
3432
57dc9a57
TM		 3433struct nfs4_createdata {
3434 struct rpc_message msg;
3435 struct nfs4_create_arg arg;
3436 struct nfs4_create_res res;
3437 struct nfs_fh fh;
3438 struct nfs_fattr fattr;
1775fd3e 3439 struct nfs4_label *label;
57dc9a57
TM		 3440};
3441
3442static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3443 struct qstr *name, struct iattr *sattr, u32 ftype)
3444{
3445 struct nfs4_createdata *data;
3446
3447 data = kzalloc(sizeof(*data), GFP_KERNEL);
3448 if (data != NULL) {
3449 struct nfs_server *server = NFS_SERVER(dir);
3450
14c43f76
DQ		 3451 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3452 if (IS_ERR(data->label))
3453 goto out_free;
3454
57dc9a57
TM		 3455 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3456 data->msg.rpc_argp = &data->arg;
3457 data->msg.rpc_resp = &data->res;
3458 data->arg.dir_fh = NFS_FH(dir);
3459 data->arg.server = server;
3460 data->arg.name = name;
3461 data->arg.attrs = sattr;
3462 data->arg.ftype = ftype;
aa9c2669 3463 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3464 data->res.server = server;
3465 data->res.fh = &data->fh;
3466 data->res.fattr = &data->fattr;
1775fd3e 3467 data->res.label = data->label;
57dc9a57 3468 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3469 }
3470 return data;
14c43f76
DQ		 3471out_free:
3472 kfree(data);
3473 return NULL;
57dc9a57
TM		 3474}
3475
3476static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3477{
7c513058 3478 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3479 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3480 if (status == 0) {
3481 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3482 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3483 }
3484 return status;
3485}
3486
3487static void nfs4_free_createdata(struct nfs4_createdata *data)
3488{
14c43f76 3489 nfs4_label_free(data->label);
57dc9a57
TM		 3490 kfree(data);
3491}
3492
4f390c15 3493static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3494 struct page *page, unsigned int len, struct iattr *sattr,
3495 struct nfs4_label *label)
1da177e4 3496{
57dc9a57
TM		 3497 struct nfs4_createdata *data;
3498 int status = -ENAMETOOLONG;
1da177e4 3499
94a6d753 3500 if (len > NFS4_MAXPATHLEN)
57dc9a57 3501 goto out;
4f390c15 3502
57dc9a57
TM		 3503 status = -ENOMEM;
3504 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3505 if (data == NULL)
3506 goto out;
3507
3508 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3509 data->arg.u.symlink.pages = &page;
3510 data->arg.u.symlink.len = len;
1775fd3e 3511 data->arg.label = label;
1da177e4 3512
57dc9a57
TM		 3513 status = nfs4_do_create(dir, dentry, data);
3514
3515 nfs4_free_createdata(data);
3516out:
1da177e4
LT		 3517 return status;
3518}
3519
4f390c15 3520static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3521 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3522{
3523 struct nfs4_exception exception = { };
aa9c2669 3524 struct nfs4_label l, *label = NULL;
1da177e4 3525 int err;
aa9c2669
DQ		 3526
3527 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3528
1da177e4
LT		 3529 do {
3530 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753 3531 _nfs4_proc_symlink(dir, dentry, page,
1775fd3e 3532 len, sattr, label),
1da177e4
LT		 3533 &exception);
3534 } while (exception.retry);
aa9c2669
DQ		 3535
3536 nfs4_label_release_security(label);
1da177e4
LT		 3537 return err;
3538}
3539
3540static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3541 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3542{
57dc9a57
TM		 3543 struct nfs4_createdata *data;
3544 int status = -ENOMEM;
1da177e4 3545
57dc9a57
TM		 3546 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3547 if (data == NULL)
3548 goto out;
3549
1775fd3e 3550 data->arg.label = label;
57dc9a57
TM		 3551 status = nfs4_do_create(dir, dentry, data);
3552
3553 nfs4_free_createdata(data);
3554out:
1da177e4
LT		 3555 return status;
3556}
3557
3558static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3559 struct iattr *sattr)
3560{
3561 struct nfs4_exception exception = { };
aa9c2669 3562 struct nfs4_label l, *label = NULL;
1da177e4 3563 int err;
a8a5da99 3564
aa9c2669
DQ		 3565 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3566
a8a5da99 3567 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3568 do {
3569 err = nfs4_handle_exception(NFS_SERVER(dir),
1775fd3e 3570 _nfs4_proc_mkdir(dir, dentry, sattr, label),
1da177e4
LT		 3571 &exception);
3572 } while (exception.retry);
aa9c2669
DQ		 3573 nfs4_label_release_security(label);
3574
1da177e4
LT		 3575 return err;
3576}
3577
3578static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3579 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3580{
3581 struct inode *dir = dentry->d_inode;
3582 struct nfs4_readdir_arg args = {
3583 .fh = NFS_FH(dir),
56e4ebf8 3584 .pages = pages,
1da177e4
LT		 3585 .pgbase = 0,
3586 .count = count,
96d25e53 3587 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3588 .plus = plus,
1da177e4
LT		 3589 };
3590 struct nfs4_readdir_res res;
3591 struct rpc_message msg = {
3592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3593 .rpc_argp = &args,
3594 .rpc_resp = &res,
3595 .rpc_cred = cred,
3596 };
3597 int status;
3598
3110ff80 3599 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3600 dentry->d_parent->d_name.name,
3601 dentry->d_name.name,
3602 (unsigned long long)cookie);
c3f52af3 3603 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3604 res.pgbase = args.pgbase;
7c513058 3605 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3606 if (status >= 0) {
c3f52af3 3607 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3608 status += args.pgbase;
3609 }
c4812998
TM		 3610
3611 nfs_invalidate_atime(dir);
3612
3110ff80 3613 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3614 return status;
3615}
3616
3617static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3618 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3619{
3620 struct nfs4_exception exception = { };
3621 int err;
3622 do {
3623 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3624 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3625 pages, count, plus),
1da177e4
LT		 3626 &exception);
3627 } while (exception.retry);
3628 return err;
3629}
3630
3631static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3632 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3633{
57dc9a57
TM		 3634 struct nfs4_createdata *data;
3635 int mode = sattr->ia_mode;
3636 int status = -ENOMEM;
1da177e4 3637
57dc9a57
TM		 3638 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3639 if (data == NULL)
3640 goto out;
3641
1da177e4 3642 if (S_ISFIFO(mode))
57dc9a57 3643 data->arg.ftype = NF4FIFO;
1da177e4 3644 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3645 data->arg.ftype = NF4BLK;
3646 data->arg.u.device.specdata1 = MAJOR(rdev);
3647 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3648 }
3649 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3650 data->arg.ftype = NF4CHR;
3651 data->arg.u.device.specdata1 = MAJOR(rdev);
3652 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3653 } else if (!S_ISSOCK(mode)) {
3654 status = -EINVAL;
3655 goto out_free;
1da177e4 3656 }
1775fd3e 3657
aa9c2669 3658 data->arg.label = label;
57dc9a57 3659 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3660out_free:
57dc9a57
TM		 3661 nfs4_free_createdata(data);
3662out:
1da177e4
LT		 3663 return status;
3664}
3665
3666static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3667 struct iattr *sattr, dev_t rdev)
3668{
3669 struct nfs4_exception exception = { };
aa9c2669 3670 struct nfs4_label l, *label = NULL;
1da177e4 3671 int err;
a8a5da99 3672
aa9c2669
DQ		 3673 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3674
a8a5da99 3675 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3676 do {
3677 err = nfs4_handle_exception(NFS_SERVER(dir),
aa9c2669 3678 _nfs4_proc_mknod(dir, dentry, sattr, label, rdev),
1da177e4
LT		 3679 &exception);
3680 } while (exception.retry);
aa9c2669
DQ		 3681
3682 nfs4_label_release_security(label);
3683
1da177e4
LT		 3684 return err;
3685}
3686
3687static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3688 struct nfs_fsstat *fsstat)
3689{
3690 struct nfs4_statfs_arg args = {
3691 .fh = fhandle,
3692 .bitmask = server->attr_bitmask,
3693 };
24ad148a
BH		 3694 struct nfs4_statfs_res res = {
3695 .fsstat = fsstat,
3696 };
1da177e4
LT		 3697 struct rpc_message msg = {
3698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3699 .rpc_argp = &args,
24ad148a 3700 .rpc_resp = &res,
1da177e4
LT		 3701 };
3702
0e574af1 3703 nfs_fattr_init(fsstat->fattr);
7c513058 3704 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3705}
3706
3707static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3708{
3709 struct nfs4_exception exception = { };
3710 int err;
3711 do {
3712 err = nfs4_handle_exception(server,
3713 _nfs4_proc_statfs(server, fhandle, fsstat),
3714 &exception);
3715 } while (exception.retry);
3716 return err;
3717}
3718
3719static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3720 struct nfs_fsinfo *fsinfo)
3721{
3722 struct nfs4_fsinfo_arg args = {
3723 .fh = fhandle,
3724 .bitmask = server->attr_bitmask,
3725 };
3dda5e43
BH		 3726 struct nfs4_fsinfo_res res = {
3727 .fsinfo = fsinfo,
3728 };
1da177e4
LT		 3729 struct rpc_message msg = {
3730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3731 .rpc_argp = &args,
3dda5e43 3732 .rpc_resp = &res,
1da177e4
LT		 3733 };
3734
7c513058 3735 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3736}
3737
3738static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3739{
3740 struct nfs4_exception exception = { };
83ca7f5a 3741 unsigned long now = jiffies;
1da177e4
LT		 3742 int err;
3743
3744 do {
83ca7f5a
CL		 3745 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3746 if (err == 0) {
3747 struct nfs_client *clp = server->nfs_client;
3748
3749 spin_lock(&clp->cl_lock);
3750 clp->cl_lease_time = fsinfo->lease_time * HZ;
3751 clp->cl_last_renewal = now;
3752 spin_unlock(&clp->cl_lock);
3753 break;
3754 }
3755 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3756 } while (exception.retry);
3757 return err;
3758}
3759
3760static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3761{
e38eb650
BS		 3762 int error;
3763
0e574af1 3764 nfs_fattr_init(fsinfo->fattr);
e38eb650 3765 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3766 if (error == 0) {
3767 /* block layout checks this! */
3768 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3769 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3770 }
e38eb650
BS		 3771
3772 return error;
1da177e4
LT		 3773}
3774
3775static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3776 struct nfs_pathconf *pathconf)
3777{
3778 struct nfs4_pathconf_arg args = {
3779 .fh = fhandle,
3780 .bitmask = server->attr_bitmask,
3781 };
d45b2989
BH		 3782 struct nfs4_pathconf_res res = {
3783 .pathconf = pathconf,
3784 };
1da177e4
LT		 3785 struct rpc_message msg = {
3786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3787 .rpc_argp = &args,
d45b2989 3788 .rpc_resp = &res,
1da177e4
LT		 3789 };
3790
3791 /* None of the pathconf attributes are mandatory to implement */
3792 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3793 memset(pathconf, 0, sizeof(*pathconf));
3794 return 0;
3795 }
3796
0e574af1 3797 nfs_fattr_init(pathconf->fattr);
7c513058 3798 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3799}
3800
3801static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3802 struct nfs_pathconf *pathconf)
3803{
3804 struct nfs4_exception exception = { };
3805 int err;
3806
3807 do {
3808 err = nfs4_handle_exception(server,
3809 _nfs4_proc_pathconf(server, fhandle, pathconf),
3810 &exception);
3811 } while (exception.retry);
3812 return err;
3813}
3814
5521abfd 3815int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3816 const struct nfs_open_context *ctx,
3817 const struct nfs_lock_context *l_ctx,
3818 fmode_t fmode)
3819{
3820 const struct nfs_lockowner *lockowner = NULL;
3821
3822 if (l_ctx != NULL)
3823 lockowner = &l_ctx->lockowner;
5521abfd 3824 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3825}
3826EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3827
5521abfd
TM		 3828static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3829 const struct nfs_open_context *ctx,
3830 const struct nfs_lock_context *l_ctx,
3831 fmode_t fmode)
3832{
3833 nfs4_stateid current_stateid;
3834
3835 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3836 return false;
3837 return nfs4_stateid_match(stateid, &current_stateid);
3838}
3839
3840static bool nfs4_error_stateid_expired(int err)
3841{
3842 switch (err) {
3843 case -NFS4ERR_DELEG_REVOKED:
3844 case -NFS4ERR_ADMIN_REVOKED:
3845 case -NFS4ERR_BAD_STATEID:
3846 case -NFS4ERR_STALE_STATEID:
3847 case -NFS4ERR_OLD_STATEID:
3848 case -NFS4ERR_OPENMODE:
3849 case -NFS4ERR_EXPIRED:
3850 return true;
3851 }
3852 return false;
3853}
3854
d20581aa
BH		 3855void __nfs4_read_done_cb(struct nfs_read_data *data)
3856{
cd841605 3857 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3858}
3859
cbdabc7f 3860static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3861{
cd841605 3862 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3863
9e33bed5 3864 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3865 rpc_restart_call_prepare(task);
ec06c096 3866 return -EAGAIN;
1da177e4 3867 }
8850df99 3868
d20581aa 3869 __nfs4_read_done_cb(data);
1da177e4 3870 if (task->tk_status > 0)
ec06c096
TM		 3871 renew_lease(server, data->timestamp);
3872 return 0;
1da177e4
LT		 3873}
3874
5521abfd
TM		 3875static bool nfs4_read_stateid_changed(struct rpc_task *task,
3876 struct nfs_readargs *args)
3877{
3878
3879 if (!nfs4_error_stateid_expired(task->tk_status) ||
3880 nfs4_stateid_is_current(&args->stateid,
3881 args->context,
3882 args->lock_context,
3883 FMODE_READ))
3884 return false;
3885 rpc_restart_call_prepare(task);
3886 return true;
3887}
3888
cbdabc7f
AA		 3889static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3890{
3891
3892 dprintk("--> %s\n", __func__);
3893
3894 if (!nfs4_sequence_done(task, &data->res.seq_res))
3895 return -EAGAIN;
5521abfd
TM		 3896 if (nfs4_read_stateid_changed(task, &data->args))
3897 return -EAGAIN;
d20581aa
BH		 3898 return data->read_done_cb ? data->read_done_cb(task, data) :
3899 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3900}
3901
bdc7f021 3902static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3903{
1da177e4 3904 data->timestamp = jiffies;
cbdabc7f 3905 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3906 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3907 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3908}
3909
ea7c3303
BS		 3910static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3911{
9b206149 3912 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3913 &data->args.seq_args,
3914 &data->res.seq_res,
9b206149
TM		 3915 task))
3916 return;
3917 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3918 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3919}
3920
b029bc9b 3921static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3922{
cd841605 3923 struct inode *inode = data->header->inode;
1da177e4 3924
9e33bed5 3925 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3926 rpc_restart_call_prepare(task);
788e7a89 3927 return -EAGAIN;
1da177e4 3928 }
4f9838c7 3929 if (task->tk_status >= 0) {
1da177e4 3930 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3931 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3932 }
788e7a89 3933 return 0;
1da177e4
LT		 3934}
3935
5521abfd
TM		 3936static bool nfs4_write_stateid_changed(struct rpc_task *task,
3937 struct nfs_writeargs *args)
3938{
3939
3940 if (!nfs4_error_stateid_expired(task->tk_status) ||
3941 nfs4_stateid_is_current(&args->stateid,
3942 args->context,
3943 args->lock_context,
3944 FMODE_WRITE))
3945 return false;
3946 rpc_restart_call_prepare(task);
3947 return true;
3948}
3949
b029bc9b
FI		 3950static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3951{
3952 if (!nfs4_sequence_done(task, &data->res.seq_res))
3953 return -EAGAIN;
5521abfd
TM		 3954 if (nfs4_write_stateid_changed(task, &data->args))
3955 return -EAGAIN;
d20581aa
BH		 3956 return data->write_done_cb ? data->write_done_cb(task, data) :
3957 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3958}
3959
5a37f851
TM		 3960static
3961bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3962{
5a37f851
TM		 3963 const struct nfs_pgio_header *hdr = data->header;
3964
3965 /* Don't request attributes for pNFS or O_DIRECT writes */
3966 if (data->ds_clp != NULL || hdr->dreq != NULL)
3967 return false;
3968 /* Otherwise, request attributes if and only if we don't hold
3969 * a delegation
3970 */
011e2a7f 3971 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3972}
a69aef14 3973
bdc7f021 3974static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3975{
cd841605 3976 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3977
5a37f851 3978 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3979 data->args.bitmask = NULL;
3980 data->res.fattr = NULL;
3981 } else
3982 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3983
b029bc9b
FI		 3984 if (!data->write_done_cb)
3985 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3986 data->res.server = server;
1da177e4
LT		 3987 data->timestamp = jiffies;
3988
bdc7f021 3989 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3990 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3991}
3992
c6cb80d0
BS		 3993static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3994{
9b206149 3995 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3996 &data->args.seq_args,
3997 &data->res.seq_res,
9b206149
TM		 3998 task))
3999 return;
4000 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4001 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4002}
4003
0b7c0153 4004static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4005{
d9afbd1b
TM		 4006 nfs4_setup_sequence(NFS_SERVER(data->inode),
4007 &data->args.seq_args,
4008 &data->res.seq_res,
4009 task);
1da177e4
LT		 4010}
4011
0b7c0153 4012static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4013{
1da177e4 4014 struct inode *inode = data->inode;
14516c3a 4015
9e33bed5 4016 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4017 rpc_restart_call_prepare(task);
788e7a89 4018 return -EAGAIN;
1da177e4 4019 }
788e7a89 4020 return 0;
1da177e4
LT		 4021}
4022
0b7c0153 4023static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4024{
4025 if (!nfs4_sequence_done(task, &data->res.seq_res))
4026 return -EAGAIN;
0b7c0153 4027 return data->commit_done_cb(task, data);
5f452431
FI		 4028}
4029
0b7c0153 4030static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4031{
788e7a89 4032 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4033
0b7c0153
FI		 4034 if (data->commit_done_cb == NULL)
4035 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4036 data->res.server = server;
bdc7f021 4037 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4038 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4039}
4040
9bc4e3ca
CL		 4041struct nfs4_renewdata {
4042 struct nfs_client *client;
4043 unsigned long timestamp;
4044};
4045
1da177e4
LT		 4046/*
4047 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4048 * standalone procedure for queueing an asynchronous RENEW.
4049 */
9bc4e3ca 4050static void nfs4_renew_release(void *calldata)
dc96aef9 4051{
9bc4e3ca
CL		 4052 struct nfs4_renewdata *data = calldata;
4053 struct nfs_client *clp = data->client;
dc96aef9 4054
0851de06
AB		 4055 if (atomic_read(&clp->cl_count) > 1)
4056 nfs4_schedule_state_renewal(clp);
4057 nfs_put_client(clp);
9bc4e3ca 4058 kfree(data);
dc96aef9
AB		 4059}
4060
9bc4e3ca 4061static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4062{
9bc4e3ca
CL		 4063 struct nfs4_renewdata *data = calldata;
4064 struct nfs_client *clp = data->client;
4065 unsigned long timestamp = data->timestamp;
1da177e4
LT		 4066
4067 if (task->tk_status < 0) {
95baa25c 4068 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4069 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4070 return;
4071 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4072 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4073 return;
4074 }
4075 nfs4_schedule_path_down_recovery(clp);
1da177e4 4076 }
452e9352 4077 do_renew_lease(clp, timestamp);
1da177e4
LT		 4078}
4079
963d8fe5
TM		 4080static const struct rpc_call_ops nfs4_renew_ops = {
4081 .rpc_call_done = nfs4_renew_done,
dc96aef9 4082 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4083};
4084
2f60ea6b 4085static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4086{
4087 struct rpc_message msg = {
4088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4089 .rpc_argp = clp,
b4454fe1 4090 .rpc_cred = cred,
1da177e4 4091 };
9bc4e3ca 4092 struct nfs4_renewdata *data;
1da177e4 4093
2f60ea6b
TM		 4094 if (renew_flags == 0)
4095 return 0;
0851de06
AB		 4096 if (!atomic_inc_not_zero(&clp->cl_count))
4097 return -EIO;
b569ad34 4098 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4099 if (data == NULL)
4100 return -ENOMEM;
4101 data->client = clp;
4102 data->timestamp = jiffies;
bc7a05ca 4103 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4104 &nfs4_renew_ops, data);
1da177e4
LT		 4105}
4106
8534d4ec 4107static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4108{
4109 struct rpc_message msg = {
4110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4111 .rpc_argp = clp,
b4454fe1 4112 .rpc_cred = cred,
1da177e4
LT		 4113 };
4114 unsigned long now = jiffies;
4115 int status;
4116
bc7a05ca 4117 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4118 if (status < 0)
4119 return status;
452e9352 4120 do_renew_lease(clp, now);
1da177e4
LT		 4121 return 0;
4122}
4123
aa1870af
BF		 4124static inline int nfs4_server_supports_acls(struct nfs_server *server)
4125{
4126 return (server->caps & NFS_CAP_ACLS)
4127 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4128 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4129}
4130
21f498c2
TM		 4131/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4132 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4133 * the stack.
4134 */
21f498c2 4135#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4136
e9e3d724
NH		 4137static int buf_to_pages_noslab(const void *buf, size_t buflen,
4138 struct page **pages, unsigned int *pgbase)
4139{
4140 struct page *newpage, **spages;
4141 int rc = 0;
4142 size_t len;
4143 spages = pages;
4144
4145 do {
21f498c2 4146 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4147 newpage = alloc_page(GFP_KERNEL);
4148
4149 if (newpage == NULL)
4150 goto unwind;
4151 memcpy(page_address(newpage), buf, len);
4152 buf += len;
4153 buflen -= len;
4154 *pages++ = newpage;
4155 rc++;
4156 } while (buflen != 0);
4157
4158 return rc;
4159
4160unwind:
4161 for(; rc > 0; rc--)
4162 __free_page(spages[rc-1]);
4163 return -ENOMEM;
4164}
4165
e50a1c2e
BF		 4166struct nfs4_cached_acl {
4167 int cached;
4168 size_t len;
3e9d4154 4169 char data[0];
e50a1c2e
BF		 4170};
4171
4172static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4173{
4174 struct nfs_inode *nfsi = NFS_I(inode);
4175
4176 spin_lock(&inode->i_lock);
4177 kfree(nfsi->nfs4_acl);
4178 nfsi->nfs4_acl = acl;
4179 spin_unlock(&inode->i_lock);
4180}
4181
4182static void nfs4_zap_acl_attr(struct inode *inode)
4183{
4184 nfs4_set_cached_acl(inode, NULL);
4185}
4186
4187static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4188{
4189 struct nfs_inode *nfsi = NFS_I(inode);
4190 struct nfs4_cached_acl *acl;
4191 int ret = -ENOENT;
4192
4193 spin_lock(&inode->i_lock);
4194 acl = nfsi->nfs4_acl;
4195 if (acl == NULL)
4196 goto out;
4197 if (buf == NULL) /* user is just asking for length */
4198 goto out_len;
4199 if (acl->cached == 0)
4200 goto out;
4201 ret = -ERANGE; /* see getxattr(2) man page */
4202 if (acl->len > buflen)
4203 goto out;
4204 memcpy(buf, acl->data, acl->len);
4205out_len:
4206 ret = acl->len;
4207out:
4208 spin_unlock(&inode->i_lock);
4209 return ret;
4210}
4211
5794d21e 4212static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4213{
4214 struct nfs4_cached_acl *acl;
b291f1b1 4215 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4216
1f1ea6c2 4217 if (buflen <= PAGE_SIZE) {
b291f1b1 4218 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4219 if (acl == NULL)
4220 goto out;
4221 acl->cached = 1;
5794d21e 4222 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4223 } else {
4224 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4225 if (acl == NULL)
4226 goto out;
4227 acl->cached = 0;
4228 }
4229 acl->len = acl_len;
4230out:
4231 nfs4_set_cached_acl(inode, acl);
4232}
4233
bf118a34
AA		 4234/*
4235 * The getxattr API returns the required buffer length when called with a
4236 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4237 * the required buf. On a NULL buf, we send a page of data to the server
4238 * guessing that the ACL request can be serviced by a page. If so, we cache
4239 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4240 * the cache. If not so, we throw away the page, and cache the required
4241 * length. The next getxattr call will then produce another round trip to
4242 * the server, this time with the input buf of the required size.
4243 */
16b4289c 4244static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4245{
bf118a34 4246 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4247 struct nfs_getaclargs args = {
4248 .fh = NFS_FH(inode),
4249 .acl_pages = pages,
4250 .acl_len = buflen,
4251 };
663c79b3
BH		 4252 struct nfs_getaclres res = {
4253 .acl_len = buflen,
4254 };
aa1870af
BF		 4255 struct rpc_message msg = {
4256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4257 .rpc_argp = &args,
663c79b3 4258 .rpc_resp = &res,
aa1870af 4259 };
21f498c2
TM		 4260 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4261 int ret = -ENOMEM, i;
aa1870af 4262
bf118a34
AA		 4263 /* As long as we're doing a round trip to the server anyway,
4264 * let's be prepared for a page of acl data. */
4265 if (npages == 0)
4266 npages = 1;
21f498c2
TM		 4267 if (npages > ARRAY_SIZE(pages))
4268 return -ERANGE;
5a006899 4269
bf118a34
AA		 4270 for (i = 0; i < npages; i++) {
4271 pages[i] = alloc_page(GFP_KERNEL);
4272 if (!pages[i])
4273 goto out_free;
e50a1c2e 4274 }
5a006899
SP		 4275
4276 /* for decoding across pages */
4277 res.acl_scratch = alloc_page(GFP_KERNEL);
4278 if (!res.acl_scratch)
4279 goto out_free;
4280
bf118a34
AA		 4281 args.acl_len = npages * PAGE_SIZE;
4282 args.acl_pgbase = 0;
5a006899 4283
de040bec 4284 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4285 __func__, buf, buflen, npages, args.acl_len);
4286 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4287 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4288 if (ret)
4289 goto out_free;
bf118a34 4290
1f1ea6c2
TM		 4291 /* Handle the case where the passed-in buffer is too short */
4292 if (res.acl_flags & NFS4_ACL_TRUNC) {
4293 /* Did the user only issue a request for the acl length? */
4294 if (buf == NULL)
4295 goto out_ok;
e50a1c2e 4296 ret = -ERANGE;
1f1ea6c2 4297 goto out_free;
e50a1c2e 4298 }
1f1ea6c2 4299 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4300 if (buf) {
4301 if (res.acl_len > buflen) {
4302 ret = -ERANGE;
4303 goto out_free;
4304 }
1f1ea6c2 4305 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4306 }
1f1ea6c2
TM		 4307out_ok:
4308 ret = res.acl_len;
e50a1c2e 4309out_free:
bf118a34
AA		 4310 for (i = 0; i < npages; i++)
4311 if (pages[i])
4312 __free_page(pages[i]);
331818f1
TM		 4313 if (res.acl_scratch)
4314 __free_page(res.acl_scratch);
aa1870af
BF		 4315 return ret;
4316}
4317
16b4289c
TM		 4318static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4319{
4320 struct nfs4_exception exception = { };
4321 ssize_t ret;
4322 do {
4323 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4324 if (ret >= 0)
4325 break;
4326 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4327 } while (exception.retry);
4328 return ret;
4329}
4330
e50a1c2e
BF		 4331static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4332{
4333 struct nfs_server *server = NFS_SERVER(inode);
4334 int ret;
4335
4336 if (!nfs4_server_supports_acls(server))
4337 return -EOPNOTSUPP;
4338 ret = nfs_revalidate_inode(server, inode);
4339 if (ret < 0)
4340 return ret;
08a22b39
AK		 4341 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4342 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4343 ret = nfs4_read_cached_acl(inode, buf, buflen);
4344 if (ret != -ENOENT)
bf118a34
AA		 4345 /* -ENOENT is returned if there is no ACL or if there is an ACL
4346 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4347 return ret;
4348 return nfs4_get_acl_uncached(inode, buf, buflen);
4349}
4350
16b4289c 4351static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4352{
4353 struct nfs_server *server = NFS_SERVER(inode);
4354 struct page *pages[NFS4ACL_MAXPAGES];
4355 struct nfs_setaclargs arg = {
4356 .fh = NFS_FH(inode),
4357 .acl_pages = pages,
4358 .acl_len = buflen,
4359 };
73c403a9 4360 struct nfs_setaclres res;
4b580ee3
BF		 4361 struct rpc_message msg = {
4362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4363 .rpc_argp = &arg,
73c403a9 4364 .rpc_resp = &res,
4b580ee3 4365 };
21f498c2 4366 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4367 int ret, i;
4b580ee3
BF		 4368
4369 if (!nfs4_server_supports_acls(server))
4370 return -EOPNOTSUPP;
21f498c2
TM		 4371 if (npages > ARRAY_SIZE(pages))
4372 return -ERANGE;
e9e3d724
NH		 4373 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4374 if (i < 0)
4375 return i;
57ec14c5 4376 nfs4_inode_return_delegation(inode);
7c513058 4377 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4378
4379 /*
4380 * Free each page after tx, so the only ref left is
4381 * held by the network stack
4382 */
4383 for (; i > 0; i--)
4384 put_page(pages[i-1]);
4385
08a22b39
AK		 4386 /*
4387 * Acl update can result in inode attribute update.
4388 * so mark the attribute cache invalid.
4389 */
4390 spin_lock(&inode->i_lock);
4391 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4392 spin_unlock(&inode->i_lock);
f41f7418
TM		 4393 nfs_access_zap_cache(inode);
4394 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4395 return ret;
4396}
4397
16b4289c
TM		 4398static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4399{
4400 struct nfs4_exception exception = { };
4401 int err;
4402 do {
4403 err = nfs4_handle_exception(NFS_SERVER(inode),
4404 __nfs4_proc_set_acl(inode, buf, buflen),
4405 &exception);
4406 } while (exception.retry);
4407 return err;
4408}
4409
aa9c2669
DQ		 4410#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4411static int _nfs4_get_security_label(struct inode *inode, void *buf,
4412 size_t buflen)
4413{
4414 struct nfs_server *server = NFS_SERVER(inode);
4415 struct nfs_fattr fattr;
4416 struct nfs4_label label = {0, 0, buflen, buf};
4417
4418 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4419 struct nfs4_getattr_arg args = {
4420 .fh = NFS_FH(inode),
4421 .bitmask = bitmask,
4422 };
4423 struct nfs4_getattr_res res = {
4424 .fattr = &fattr,
4425 .label = &label,
4426 .server = server,
4427 };
4428 struct rpc_message msg = {
4429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4430 .rpc_argp = &args,
4431 .rpc_resp = &res,
4432 };
4433 int ret;
4434
4435 nfs_fattr_init(&fattr);
4436
4437 ret = rpc_call_sync(server->client, &msg, 0);
4438 if (ret)
4439 return ret;
4440 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4441 return -ENOENT;
4442 if (buflen < label.len)
4443 return -ERANGE;
4444 return 0;
4445}
4446
4447static int nfs4_get_security_label(struct inode *inode, void *buf,
4448 size_t buflen)
4449{
4450 struct nfs4_exception exception = { };
4451 int err;
4452
4453 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4454 return -EOPNOTSUPP;
4455
4456 do {
4457 err = nfs4_handle_exception(NFS_SERVER(inode),
4458 _nfs4_get_security_label(inode, buf, buflen),
4459 &exception);
4460 } while (exception.retry);
4461 return err;
4462}
4463
4464static int _nfs4_do_set_security_label(struct inode *inode,
4465 struct nfs4_label *ilabel,
4466 struct nfs_fattr *fattr,
4467 struct nfs4_label *olabel)
4468{
4469
4470 struct iattr sattr = {0};
4471 struct nfs_server *server = NFS_SERVER(inode);
4472 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4473 struct nfs_setattrargs args = {
4474 .fh = NFS_FH(inode),
4475 .iap = &sattr,
4476 .server = server,
4477 .bitmask = bitmask,
4478 .label = ilabel,
4479 };
4480 struct nfs_setattrres res = {
4481 .fattr = fattr,
4482 .label = olabel,
4483 .server = server,
4484 };
4485 struct rpc_message msg = {
4486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4487 .rpc_argp = &args,
4488 .rpc_resp = &res,
4489 };
4490 int status;
4491
4492 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4493
4494 status = rpc_call_sync(server->client, &msg, 0);
4495 if (status)
4496 dprintk("%s failed: %d\n", __func__, status);
4497
4498 return status;
4499}
4500
4501static int nfs4_do_set_security_label(struct inode *inode,
4502 struct nfs4_label *ilabel,
4503 struct nfs_fattr *fattr,
4504 struct nfs4_label *olabel)
4505{
4506 struct nfs4_exception exception = { };
4507 int err;
4508
4509 do {
4510 err = nfs4_handle_exception(NFS_SERVER(inode),
4511 _nfs4_do_set_security_label(inode, ilabel,
4512 fattr, olabel),
4513 &exception);
4514 } while (exception.retry);
4515 return err;
4516}
4517
4518static int
4519nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4520{
4521 struct nfs4_label ilabel, *olabel = NULL;
4522 struct nfs_fattr fattr;
4523 struct rpc_cred *cred;
4524 struct inode *inode = dentry->d_inode;
4525 int status;
4526
4527 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4528 return -EOPNOTSUPP;
4529
4530 nfs_fattr_init(&fattr);
4531
4532 ilabel.pi = 0;
4533 ilabel.lfs = 0;
4534 ilabel.label = (char *)buf;
4535 ilabel.len = buflen;
4536
4537 cred = rpc_lookup_cred();
4538 if (IS_ERR(cred))
4539 return PTR_ERR(cred);
4540
4541 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4542 if (IS_ERR(olabel)) {
4543 status = -PTR_ERR(olabel);
4544 goto out;
4545 }
4546
4547 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4548 if (status == 0)
4549 nfs_setsecurity(inode, &fattr, olabel);
4550
4551 nfs4_label_free(olabel);
4552out:
4553 put_rpccred(cred);
4554 return status;
4555}
4556#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4557
4558
1da177e4 4559static int
aa5190d0 4560nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4561{
aa5190d0
TM		 4562 struct nfs_client *clp = server->nfs_client;
4563
4564 if (task->tk_status >= 0)
1da177e4
LT		 4565 return 0;
4566 switch(task->tk_status) {
a1d0b5ee 4567 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4568 case -NFS4ERR_ADMIN_REVOKED:
4569 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4570 if (state == NULL)
4571 break;
4572 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4573 case -NFS4ERR_OPENMODE:
4574 if (state == NULL)
4575 break;
5d422301
TM		 4576 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4577 goto stateid_invalid;
0400a6b0 4578 goto wait_on_recovery;
0ced63d1 4579 case -NFS4ERR_EXPIRED:
5d422301
TM		 4580 if (state != NULL) {
4581 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4582 goto stateid_invalid;
4583 }
1da177e4 4584 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4585 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4586 nfs4_schedule_lease_recovery(clp);
4587 goto wait_on_recovery;
4745e315
AA		 4588#if defined(CONFIG_NFS_V4_1)
4589 case -NFS4ERR_BADSESSION:
4590 case -NFS4ERR_BADSLOT:
4591 case -NFS4ERR_BAD_HIGH_SLOT:
4592 case -NFS4ERR_DEADSESSION:
4593 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4594 case -NFS4ERR_SEQ_FALSE_RETRY:
4595 case -NFS4ERR_SEQ_MISORDERED:
4596 dprintk("%s ERROR %d, Reset session\n", __func__,
4597 task->tk_status);
9f594791 4598 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4599 task->tk_status = 0;
4600 return -EAGAIN;
4601#endif /* CONFIG_NFS_V4_1 */
1da177e4 4602 case -NFS4ERR_DELAY:
aa5190d0 4603 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4604 case -NFS4ERR_GRACE:
1da177e4
LT		 4605 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4606 task->tk_status = 0;
4607 return -EAGAIN;
a8a4ae3a 4608 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4609 case -NFS4ERR_OLD_STATEID:
4610 task->tk_status = 0;
4611 return -EAGAIN;
4612 }
4613 task->tk_status = nfs4_map_errors(task->tk_status);
4614 return 0;
5d422301
TM		 4615stateid_invalid:
4616 task->tk_status = -EIO;
4617 return 0;
0400a6b0 4618wait_on_recovery:
a2c0b9e2 4619 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4620 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4621 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4622 task->tk_status = 0;
4623 return -EAGAIN;
1da177e4
LT		 4624}
4625
f092075d
CL		 4626static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4627 nfs4_verifier *bootverf)
cd93710e
CL		 4628{
4629 __be32 verf[2];
4630
2c820d9a
CL		 4631 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4632 /* An impossible timestamp guarantees this value
4633 * will never match a generated boot time. */
4634 verf[0] = 0;
4635 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4636 } else {
f092075d
CL		 4637 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4638 verf[0] = (__be32)nn->boot_time.tv_sec;
4639 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4640 }
cd93710e
CL		 4641 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4642}
4643
e984a55a
CL		 4644static unsigned int
4645nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4646 char *buf, size_t len)
4647{
4648 unsigned int result;
4649
4650 rcu_read_lock();
4651 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4652 clp->cl_ipaddr,
4653 rpc_peeraddr2str(clp->cl_rpcclient,
4654 RPC_DISPLAY_ADDR),
4655 rpc_peeraddr2str(clp->cl_rpcclient,
4656 RPC_DISPLAY_PROTO));
4657 rcu_read_unlock();
4658 return result;
4659}
4660
4661static unsigned int
4662nfs4_init_uniform_client_string(const struct nfs_client *clp,
4663 char *buf, size_t len)
4664{
6f2ea7f2
CL		 4665 char *nodename = clp->cl_rpcclient->cl_nodename;
4666
4667 if (nfs4_client_id_uniquifier[0] != '\0')
4668 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4669 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4670 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4671 nodename);
e984a55a
CL		 4672}
4673
6bbb4ae8
CL		 4674/**
4675 * nfs4_proc_setclientid - Negotiate client ID
4676 * @clp: state data structure
4677 * @program: RPC program for NFSv4 callback service
4678 * @port: IP port number for NFS4 callback service
4679 * @cred: RPC credential to use for this call
4680 * @res: where to place the result
4681 *
4682 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4683 */
bb8b27e5
TM		 4684int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4685 unsigned short port, struct rpc_cred *cred,
4686 struct nfs4_setclientid_res *res)
1da177e4
LT		 4687{
4688 nfs4_verifier sc_verifier;
4689 struct nfs4_setclientid setclientid = {
4690 .sc_verifier = &sc_verifier,
4691 .sc_prog = program,
f4eecd5d 4692 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4693 };
4694 struct rpc_message msg = {
4695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4696 .rpc_argp = &setclientid,
bb8b27e5 4697 .rpc_resp = res,
286d7d6a 4698 .rpc_cred = cred,
1da177e4 4699 };
6bbb4ae8 4700 int status;
1da177e4 4701
de734831 4702 /* nfs_client_id4 */
f092075d 4703 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4704 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4705 setclientid.sc_name_len =
4706 nfs4_init_uniform_client_string(clp,
4707 setclientid.sc_name,
4708 sizeof(setclientid.sc_name));
4709 else
4710 setclientid.sc_name_len =
4711 nfs4_init_nonuniform_client_string(clp,
4712 setclientid.sc_name,
4713 sizeof(setclientid.sc_name));
de734831 4714 /* cb_client4 */
e984a55a 4715 rcu_read_lock();
de734831 4716 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4717 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4718 rpc_peeraddr2str(clp->cl_rpcclient,
4719 RPC_DISPLAY_NETID));
de734831
CL		 4720 rcu_read_unlock();
4721 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4722 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4723 clp->cl_ipaddr, port >> 8, port & 255);
4724
6bbb4ae8
CL		 4725 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4726 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4727 setclientid.sc_name_len, setclientid.sc_name);
4728 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4729 dprintk("NFS reply setclientid: %d\n", status);
4730 return status;
1da177e4
LT		 4731}
4732
6bbb4ae8
CL		 4733/**
4734 * nfs4_proc_setclientid_confirm - Confirm client ID
4735 * @clp: state data structure
4736 * @res: result of a previous SETCLIENTID
4737 * @cred: RPC credential to use for this call
4738 *
4739 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4740 */
fd954ae1 4741int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4742 struct nfs4_setclientid_res *arg,
4743 struct rpc_cred *cred)
1da177e4 4744{
1da177e4
LT		 4745 struct rpc_message msg = {
4746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4747 .rpc_argp = arg,
286d7d6a 4748 .rpc_cred = cred,
1da177e4 4749 };
1da177e4
LT		 4750 int status;
4751
6bbb4ae8
CL		 4752 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4753 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4754 clp->cl_clientid);
1bd714f2 4755 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4756 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4757 return status;
4758}
4759
fe650407
TM		 4760struct nfs4_delegreturndata {
4761 struct nfs4_delegreturnargs args;
fa178f29 4762 struct nfs4_delegreturnres res;
fe650407
TM		 4763 struct nfs_fh fh;
4764 nfs4_stateid stateid;
26e976a8 4765 unsigned long timestamp;
fa178f29 4766 struct nfs_fattr fattr;
fe650407
TM		 4767 int rpc_status;
4768};
4769
fe650407
TM		 4770static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4771{
4772 struct nfs4_delegreturndata *data = calldata;
938e1010 4773
14516c3a
TM		 4774 if (!nfs4_sequence_done(task, &data->res.seq_res))
4775 return;
938e1010 4776
79708861
RL		 4777 switch (task->tk_status) {
4778 case -NFS4ERR_STALE_STATEID:
4779 case -NFS4ERR_EXPIRED:
4780 case 0:
fa178f29 4781 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4782 break;
4783 default:
4784 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4785 -EAGAIN) {
d00c5d43 4786 rpc_restart_call_prepare(task);
79708861
RL		 4787 return;
4788 }
4789 }
4790 data->rpc_status = task->tk_status;
fe650407
TM		 4791}
4792
4793static void nfs4_delegreturn_release(void *calldata)
4794{
fe650407
TM		 4795 kfree(calldata);
4796}
4797
938e1010
AA		 4798#if defined(CONFIG_NFS_V4_1)
4799static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4800{
4801 struct nfs4_delegreturndata *d_data;
4802
4803 d_data = (struct nfs4_delegreturndata *)data;
4804
d9afbd1b
TM		 4805 nfs4_setup_sequence(d_data->res.server,
4806 &d_data->args.seq_args,
4807 &d_data->res.seq_res,
4808 task);
938e1010
AA		 4809}
4810#endif /* CONFIG_NFS_V4_1 */
4811
c8d149f3 4812static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4813#if defined(CONFIG_NFS_V4_1)
4814 .rpc_call_prepare = nfs4_delegreturn_prepare,
4815#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4816 .rpc_call_done = nfs4_delegreturn_done,
4817 .rpc_release = nfs4_delegreturn_release,
4818};
4819
e6f81075 4820static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4821{
4822 struct nfs4_delegreturndata *data;
fa178f29 4823 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4824 struct rpc_task *task;
5138fde0
TM		 4825 struct rpc_message msg = {
4826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4827 .rpc_cred = cred,
4828 };
c970aa85
TM		 4829 struct rpc_task_setup task_setup_data = {
4830 .rpc_client = server->client,
5138fde0 4831 .rpc_message = &msg,
c970aa85
TM		 4832 .callback_ops = &nfs4_delegreturn_ops,
4833 .flags = RPC_TASK_ASYNC,
4834 };
e6f81075 4835 int status = 0;
fe650407 4836
8535b2be 4837 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4838 if (data == NULL)
4839 return -ENOMEM;
9d12b216 4840 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4841 data->args.fhandle = &data->fh;
4842 data->args.stateid = &data->stateid;
9e907fec 4843 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4844 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4845 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4846 data->res.fattr = &data->fattr;
4847 data->res.server = server;
5138fde0 4848 nfs_fattr_init(data->res.fattr);
26e976a8 4849 data->timestamp = jiffies;
fe650407
TM		 4850 data->rpc_status = 0;
4851
c970aa85 4852 task_setup_data.callback_data = data;
1174dd1f
TM		 4853 msg.rpc_argp = &data->args;
4854 msg.rpc_resp = &data->res;
c970aa85 4855 task = rpc_run_task(&task_setup_data);
7a1218a2 4856 if (IS_ERR(task))
fe650407 4857 return PTR_ERR(task);
e6f81075
TM		 4858 if (!issync)
4859 goto out;
fe650407 4860 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4861 if (status != 0)
4862 goto out;
4863 status = data->rpc_status;
e144cbcc
TM		 4864 if (status == 0)
4865 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4866 else
4867 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4868out:
e6b3c4db 4869 rpc_put_task(task);
fe650407 4870 return status;
1da177e4
LT		 4871}
4872
e6f81075 4873int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4874{
4875 struct nfs_server *server = NFS_SERVER(inode);
4876 struct nfs4_exception exception = { };
4877 int err;
4878 do {
e6f81075 4879 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4880 switch (err) {
4881 case -NFS4ERR_STALE_STATEID:
4882 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4883 case 0:
4884 return 0;
4885 }
4886 err = nfs4_handle_exception(server, err, &exception);
4887 } while (exception.retry);
4888 return err;
4889}
4890
4891#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4892#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4893
4894/*
4895 * sleep, with exponential backoff, and retry the LOCK operation.
4896 */
4897static unsigned long
4898nfs4_set_lock_task_retry(unsigned long timeout)
4899{
416ad3c9 4900 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4901 timeout <<= 1;
4902 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4903 return NFS4_LOCK_MAXTIMEOUT;
4904 return timeout;
4905}
4906
1da177e4
LT		 4907static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4908{
4909 struct inode *inode = state->inode;
4910 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4911 struct nfs_client *clp = server->nfs_client;
911d1aaf 4912 struct nfs_lockt_args arg = {
1da177e4 4913 .fh = NFS_FH(inode),
911d1aaf 4914 .fl = request,
1da177e4 4915 };
911d1aaf
TM		 4916 struct nfs_lockt_res res = {
4917 .denied = request,
1da177e4
LT		 4918 };
4919 struct rpc_message msg = {
4920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4921 .rpc_argp = &arg,
4922 .rpc_resp = &res,
4923 .rpc_cred = state->owner->so_cred,
4924 };
1da177e4
LT		 4925 struct nfs4_lock_state *lsp;
4926 int status;
4927
911d1aaf 4928 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4929 status = nfs4_set_lock_state(state, request);
4930 if (status != 0)
4931 goto out;
4932 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4933 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4934 arg.lock_owner.s_dev = server->s_dev;
7c513058 4935 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4936 switch (status) {
4937 case 0:
4938 request->fl_type = F_UNLCK;
4939 break;
4940 case -NFS4ERR_DENIED:
4941 status = 0;
1da177e4 4942 }
70cc6487 4943 request->fl_ops->fl_release_private(request);
8d0a8a9d 4944out:
1da177e4
LT		 4945 return status;
4946}
4947
4948static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4949{
4950 struct nfs4_exception exception = { };
4951 int err;
4952
4953 do {
4954 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4955 _nfs4_proc_getlk(state, cmd, request),
4956 &exception);
4957 } while (exception.retry);
4958 return err;
4959}
4960
4961static int do_vfs_lock(struct file *file, struct file_lock *fl)
4962{
4963 int res = 0;
4964 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4965 case FL_POSIX:
4966 res = posix_lock_file_wait(file, fl);
4967 break;
4968 case FL_FLOCK:
4969 res = flock_lock_file_wait(file, fl);
4970 break;
4971 default:
4972 BUG();
4973 }
1da177e4
LT		 4974 return res;
4975}
4976
faf5f49c 4977struct nfs4_unlockdata {
911d1aaf
TM		 4978 struct nfs_locku_args arg;
4979 struct nfs_locku_res res;
faf5f49c
TM		 4980 struct nfs4_lock_state *lsp;
4981 struct nfs_open_context *ctx;
911d1aaf
TM		 4982 struct file_lock fl;
4983 const struct nfs_server *server;
26e976a8 4984 unsigned long timestamp;
faf5f49c
TM		 4985};
4986
911d1aaf
TM		 4987static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4988 struct nfs_open_context *ctx,
4989 struct nfs4_lock_state *lsp,
4990 struct nfs_seqid *seqid)
4991{
4992 struct nfs4_unlockdata *p;
4993 struct inode *inode = lsp->ls_state->inode;
4994
8535b2be 4995 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4996 if (p == NULL)
4997 return NULL;
4998 p->arg.fh = NFS_FH(inode);
4999 p->arg.fl = &p->fl;
5000 p->arg.seqid = seqid;
c1d51931 5001 p->res.seqid = seqid;
911d1aaf
TM		 5002 p->arg.stateid = &lsp->ls_stateid;
5003 p->lsp = lsp;
5004 atomic_inc(&lsp->ls_count);
5005 /* Ensure we don't close file until we're done freeing locks! */
5006 p->ctx = get_nfs_open_context(ctx);
5007 memcpy(&p->fl, fl, sizeof(p->fl));
5008 p->server = NFS_SERVER(inode);
5009 return p;
5010}
5011
06f814a3 5012static void nfs4_locku_release_calldata(void *data)
faf5f49c 5013{
963d8fe5 5014 struct nfs4_unlockdata *calldata = data;
911d1aaf 5015 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5016 nfs4_put_lock_state(calldata->lsp);
5017 put_nfs_open_context(calldata->ctx);
5018 kfree(calldata);
faf5f49c
TM		 5019}
5020
963d8fe5 5021static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5022{
963d8fe5 5023 struct nfs4_unlockdata *calldata = data;
faf5f49c 5024
14516c3a
TM		 5025 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5026 return;
faf5f49c
TM		 5027 switch (task->tk_status) {
5028 case 0:
f597c537
TM		 5029 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5030 &calldata->res.stateid);
26e976a8 5031 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5032 break;
9e33bed5
TM		 5033 case -NFS4ERR_BAD_STATEID:
5034 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5035 case -NFS4ERR_STALE_STATEID:
5036 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5037 break;
5038 default:
9e33bed5 5039 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5040 rpc_restart_call_prepare(task);
faf5f49c 5041 }
2b1bc308 5042 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5043}
5044
4ce70ada 5045static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5046{
4ce70ada 5047 struct nfs4_unlockdata *calldata = data;
faf5f49c 5048
911d1aaf 5049 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5050 goto out_wait;
795a88c9 5051 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5052 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5053 goto out_no_action;
faf5f49c 5054 }
26e976a8 5055 calldata->timestamp = jiffies;
035168ab 5056 if (nfs4_setup_sequence(calldata->server,
a893693c 5057 &calldata->arg.seq_args,
2240a9e2
TM		 5058 &calldata->res.seq_res,
5059 task) != 0)
5060 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5061 return;
5062out_no_action:
5063 task->tk_action = NULL;
5064out_wait:
5065 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5066}
5067
963d8fe5 5068static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5069 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5070 .rpc_call_done = nfs4_locku_done,
06f814a3 5071 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5072};
5073
a5d16a4d
TM		 5074static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5075 struct nfs_open_context *ctx,
5076 struct nfs4_lock_state *lsp,
5077 struct nfs_seqid *seqid)
5078{
5079 struct nfs4_unlockdata *data;
5138fde0
TM		 5080 struct rpc_message msg = {
5081 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5082 .rpc_cred = ctx->cred,
5083 };
c970aa85
TM		 5084 struct rpc_task_setup task_setup_data = {
5085 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5086 .rpc_message = &msg,
c970aa85 5087 .callback_ops = &nfs4_locku_ops,
101070ca 5088 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5089 .flags = RPC_TASK_ASYNC,
5090 };
a5d16a4d 5091
137d6aca
FF		 5092 /* Ensure this is an unlock - when canceling a lock, the
5093 * canceled lock is passed in, and it won't be an unlock.
5094 */
5095 fl->fl_type = F_UNLCK;
5096
a5d16a4d
TM		 5097 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5098 if (data == NULL) {
5099 nfs_free_seqid(seqid);
5100 return ERR_PTR(-ENOMEM);
5101 }
5102
9d12b216 5103 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5104 msg.rpc_argp = &data->arg;
5105 msg.rpc_resp = &data->res;
c970aa85
TM		 5106 task_setup_data.callback_data = data;
5107 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5108}
5109
faf5f49c
TM		 5110static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5111{
65b62a29
TM		 5112 struct inode *inode = state->inode;
5113 struct nfs4_state_owner *sp = state->owner;
5114 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5115 struct nfs_seqid *seqid;
1da177e4 5116 struct nfs4_lock_state *lsp;
06f814a3
TM		 5117 struct rpc_task *task;
5118 int status = 0;
536ff0f8 5119 unsigned char fl_flags = request->fl_flags;
faf5f49c 5120
8d0a8a9d 5121 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5122 /* Unlock _before_ we do the RPC call */
5123 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5124 /* Exclude nfs_delegation_claim_locks() */
5125 mutex_lock(&sp->so_delegreturn_mutex);
5126 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5127 down_read(&nfsi->rwsem);
5128 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5129 up_read(&nfsi->rwsem);
65b62a29 5130 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5131 goto out;
19e03c57
TM		 5132 }
5133 up_read(&nfsi->rwsem);
65b62a29 5134 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5135 if (status != 0)
9b073574
TM		 5136 goto out;
5137 /* Is this a delegated lock? */
8d0a8a9d 5138 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5139 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5140 goto out;
8535b2be 5141 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5142 status = -ENOMEM;
911d1aaf 5143 if (seqid == NULL)
9b073574 5144 goto out;
cd3758e3 5145 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5146 status = PTR_ERR(task);
5147 if (IS_ERR(task))
9b073574 5148 goto out;
a5d16a4d 5149 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5150 rpc_put_task(task);
9b073574 5151out:
536ff0f8 5152 request->fl_flags = fl_flags;
1da177e4
LT		 5153 return status;
5154}
5155
a5d16a4d
TM		 5156struct nfs4_lockdata {
5157 struct nfs_lock_args arg;
5158 struct nfs_lock_res res;
5159 struct nfs4_lock_state *lsp;
5160 struct nfs_open_context *ctx;
5161 struct file_lock fl;
26e976a8 5162 unsigned long timestamp;
a5d16a4d
TM		 5163 int rpc_status;
5164 int cancelled;
66179efe 5165 struct nfs_server *server;
a5d16a4d
TM		 5166};
5167
5168static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5169 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5170 gfp_t gfp_mask)
1da177e4 5171{
a5d16a4d
TM		 5172 struct nfs4_lockdata *p;
5173 struct inode *inode = lsp->ls_state->inode;
1da177e4 5174 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5175
8535b2be 5176 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5177 if (p == NULL)
5178 return NULL;
5179
5180 p->arg.fh = NFS_FH(inode);
5181 p->arg.fl = &p->fl;
8535b2be 5182 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5183 if (p->arg.open_seqid == NULL)
5184 goto out_free;
8535b2be 5185 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5186 if (p->arg.lock_seqid == NULL)
2f74c0a0 5187 goto out_free_seqid;
a5d16a4d 5188 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5189 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5190 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5191 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5192 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5193 p->lsp = lsp;
66179efe 5194 p->server = server;
a5d16a4d
TM		 5195 atomic_inc(&lsp->ls_count);
5196 p->ctx = get_nfs_open_context(ctx);
5197 memcpy(&p->fl, fl, sizeof(p->fl));
5198 return p;
2f74c0a0
TM		 5199out_free_seqid:
5200 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5201out_free:
5202 kfree(p);
5203 return NULL;
5204}
5205
5206static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5207{
5208 struct nfs4_lockdata *data = calldata;
5209 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5210
3110ff80 5211 dprintk("%s: begin!\n", __func__);
2f74c0a0 5212 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5213 goto out_wait;
a5d16a4d
TM		 5214 /* Do we need to do an open_to_lock_owner? */
5215 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5216 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5217 goto out_release_lock_seqid;
8fe72bac 5218 }
8e472f33 5219 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5220 data->arg.new_lock_owner = 1;
c1d51931 5221 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5222 } else
5223 data->arg.new_lock_owner = 0;
5d422301
TM		 5224 if (!nfs4_valid_open_stateid(state)) {
5225 data->rpc_status = -EBADF;
5226 task->tk_action = NULL;
5227 goto out_release_open_seqid;
5228 }
26e976a8 5229 data->timestamp = jiffies;
035168ab
TM		 5230 if (nfs4_setup_sequence(data->server,
5231 &data->arg.seq_args,
2240a9e2 5232 &data->res.seq_res,
d9afbd1b 5233 task) == 0)
66179efe 5234 return;
5d422301 5235out_release_open_seqid:
2240a9e2
TM		 5236 nfs_release_seqid(data->arg.open_seqid);
5237out_release_lock_seqid:
5238 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5239out_wait:
5240 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5241 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5242}
5243
a5d16a4d
TM		 5244static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5245{
5246 struct nfs4_lockdata *data = calldata;
5247
3110ff80 5248 dprintk("%s: begin!\n", __func__);
a5d16a4d 5249
14516c3a
TM		 5250 if (!nfs4_sequence_done(task, &data->res.seq_res))
5251 return;
66179efe 5252
a5d16a4d 5253 data->rpc_status = task->tk_status;
a5d16a4d 5254 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5255 if (data->rpc_status == 0)
5256 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5257 else
5258 goto out;
5259 }
5260 if (data->rpc_status == 0) {
f597c537 5261 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5262 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5263 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5264 }
a5d16a4d 5265out:
3110ff80 5266 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5267}
5268
5269static void nfs4_lock_release(void *calldata)
5270{
5271 struct nfs4_lockdata *data = calldata;
5272
3110ff80 5273 dprintk("%s: begin!\n", __func__);
2f74c0a0 5274 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5275 if (data->cancelled != 0) {
5276 struct rpc_task *task;
5277 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5278 data->arg.lock_seqid);
5279 if (!IS_ERR(task))
bf294b41 5280 rpc_put_task_async(task);
3110ff80 5281 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5282 } else
5283 nfs_free_seqid(data->arg.lock_seqid);
5284 nfs4_put_lock_state(data->lsp);
5285 put_nfs_open_context(data->ctx);
5286 kfree(data);
3110ff80 5287 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5288}
5289
5290static const struct rpc_call_ops nfs4_lock_ops = {
5291 .rpc_call_prepare = nfs4_lock_prepare,
5292 .rpc_call_done = nfs4_lock_done,
5293 .rpc_release = nfs4_lock_release,
5294};
5295
2bee72a6
TM		 5296static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5297{
2bee72a6
TM		 5298 switch (error) {
5299 case -NFS4ERR_ADMIN_REVOKED:
5300 case -NFS4ERR_BAD_STATEID:
ecac799a 5301 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5302 if (new_lock_owner != 0 ||
795a88c9 5303 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5304 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5305 break;
5306 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5307 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5308 case -NFS4ERR_EXPIRED:
5309 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5310 };
5311}
5312
afe6c27c 5313static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5314{
5315 struct nfs4_lockdata *data;
5316 struct rpc_task *task;
5138fde0
TM		 5317 struct rpc_message msg = {
5318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5319 .rpc_cred = state->owner->so_cred,
5320 };
c970aa85
TM		 5321 struct rpc_task_setup task_setup_data = {
5322 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5323 .rpc_message = &msg,
c970aa85 5324 .callback_ops = &nfs4_lock_ops,
101070ca 5325 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5326 .flags = RPC_TASK_ASYNC,
5327 };
a5d16a4d
TM		 5328 int ret;
5329
3110ff80 5330 dprintk("%s: begin!\n", __func__);
cd3758e3 5331 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5332 fl->fl_u.nfs4_fl.owner,
5333 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5334 if (data == NULL)
5335 return -ENOMEM;
5336 if (IS_SETLKW(cmd))
5337 data->arg.block = 1;
9d12b216 5338 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5339 msg.rpc_argp = &data->arg;
5340 msg.rpc_resp = &data->res;
c970aa85 5341 task_setup_data.callback_data = data;
8fe72bac
TM		 5342 if (recovery_type > NFS_LOCK_NEW) {
5343 if (recovery_type == NFS_LOCK_RECLAIM)
5344 data->arg.reclaim = NFS_LOCK_RECLAIM;
5345 nfs4_set_sequence_privileged(&data->arg.seq_args);
5346 }
c970aa85 5347 task = rpc_run_task(&task_setup_data);
7a1218a2 5348 if (IS_ERR(task))
a5d16a4d 5349 return PTR_ERR(task);
a5d16a4d
TM		 5350 ret = nfs4_wait_for_completion_rpc_task(task);
5351 if (ret == 0) {
5352 ret = data->rpc_status;
2bee72a6
TM		 5353 if (ret)
5354 nfs4_handle_setlk_error(data->server, data->lsp,
5355 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5356 } else
5357 data->cancelled = 1;
e6b3c4db 5358 rpc_put_task(task);
3110ff80 5359 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5360 return ret;
1da177e4
LT		 5361}
5362
5363static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5364{
202b50dc 5365 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5366 struct nfs4_exception exception = {
5367 .inode = state->inode,
5368 };
202b50dc
TM		 5369 int err;
5370
5371 do {
42a2d13e
TM		 5372 /* Cache the lock if possible... */
5373 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5374 return 0;
afe6c27c 5375 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5376 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5377 break;
5378 nfs4_handle_exception(server, err, &exception);
5379 } while (exception.retry);
5380 return err;
1da177e4
LT		 5381}
5382
5383static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5384{
202b50dc 5385 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5386 struct nfs4_exception exception = {
5387 .inode = state->inode,
5388 };
202b50dc
TM		 5389 int err;
5390
6bfc93ef
TM		 5391 err = nfs4_set_lock_state(state, request);
5392 if (err != 0)
5393 return err;
202b50dc 5394 do {
42a2d13e
TM		 5395 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5396 return 0;
afe6c27c 5397 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5398 switch (err) {
5399 default:
5400 goto out;
5401 case -NFS4ERR_GRACE:
5402 case -NFS4ERR_DELAY:
5403 nfs4_handle_exception(server, err, &exception);
5404 err = 0;
5405 }
202b50dc 5406 } while (exception.retry);
a9ed2e25 5407out:
202b50dc 5408 return err;
1da177e4
LT		 5409}
5410
f062eb6c 5411#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5412/**
5413 * nfs41_check_expired_locks - possibly free a lock stateid
5414 *
5415 * @state: NFSv4 state for an inode
5416 *
5417 * Returns NFS_OK if recovery for this stateid is now finished.
5418 * Otherwise a negative NFS4ERR value is returned.
5419 */
b01dd1d8 5420static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5421{
eb64cf96 5422 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5423 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5424 struct nfs_server *server = NFS_SERVER(state->inode);
5425
b01dd1d8 5426 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5427 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5428 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5429
5430 status = nfs41_test_stateid(server,
5431 &lsp->ls_stateid,
5432 cred);
b01dd1d8 5433 if (status != NFS_OK) {
3e60ffdd
CL		 5434 /* Free the stateid unless the server
5435 * informs us the stateid is unrecognized. */
89af2739
CL		 5436 if (status != -NFS4ERR_BAD_STATEID)
5437 nfs41_free_stateid(server,
ab7cb0df
TM		 5438 &lsp->ls_stateid,
5439 cred);
795a88c9 5440 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5441 ret = status;
5442 }
5443 }
5444 };
5445
5446 return ret;
5447}
5448
5449static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5450{
5451 int status = NFS_OK;
5452
5453 if (test_bit(LK_STATE_IN_USE, &state->flags))
5454 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5455 if (status != NFS_OK)
5456 status = nfs4_lock_expired(state, request);
5457 return status;
f062eb6c
BS		 5458}
5459#endif
5460
1da177e4
LT		 5461static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5462{
9a99af49 5463 struct nfs4_state_owner *sp = state->owner;
19e03c57 5464 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5465 unsigned char fl_flags = request->fl_flags;
9a99af49 5466 unsigned int seq;
8e469ebd 5467 int status = -ENOLCK;
1da177e4 5468
8e469ebd
TM		 5469 if ((fl_flags & FL_POSIX) &&
5470 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5471 goto out;
6bfc93ef 5472 /* Is this a delegated open? */
6bfc93ef
TM		 5473 status = nfs4_set_lock_state(state, request);
5474 if (status != 0)
5475 goto out;
01c3b861
TM		 5476 request->fl_flags |= FL_ACCESS;
5477 status = do_vfs_lock(request->fl_file, request);
5478 if (status < 0)
5479 goto out;
19e03c57 5480 down_read(&nfsi->rwsem);
01c3b861 5481 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5482 /* Yes: cache locks! */
01c3b861 5483 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5484 request->fl_flags = fl_flags & ~FL_SLEEP;
5485 status = do_vfs_lock(request->fl_file, request);
5486 goto out_unlock;
01c3b861 5487 }
9a99af49
TM		 5488 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5489 up_read(&nfsi->rwsem);
afe6c27c 5490 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5491 if (status != 0)
9a99af49
TM		 5492 goto out;
5493 down_read(&nfsi->rwsem);
5494 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5495 status = -NFS4ERR_DELAY;
01c3b861 5496 goto out_unlock;
9a99af49 5497 }
6bfc93ef 5498 /* Note: we always want to sleep here! */
01c3b861 5499 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5500 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5501 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5502 "manager!\n", __func__);
01c3b861 5503out_unlock:
19e03c57 5504 up_read(&nfsi->rwsem);
01c3b861
TM		 5505out:
5506 request->fl_flags = fl_flags;
1da177e4
LT		 5507 return status;
5508}
5509
5510static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5511{
a1d0b5ee
TM		 5512 struct nfs4_exception exception = {
5513 .state = state,
05ffe24f 5514 .inode = state->inode,
a1d0b5ee 5515 };
1da177e4
LT		 5516 int err;
5517
5518 do {
965b5d67
TM		 5519 err = _nfs4_proc_setlk(state, cmd, request);
5520 if (err == -NFS4ERR_DENIED)
5521 err = -EAGAIN;
1da177e4 5522 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5523 err, &exception);
1da177e4
LT		 5524 } while (exception.retry);
5525 return err;
5526}
5527
5528static int
5529nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5530{
5531 struct nfs_open_context *ctx;
5532 struct nfs4_state *state;
5533 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5534 int status;
5535
5536 /* verify open state */
cd3758e3 5537 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5538 state = ctx->state;
5539
5540 if (request->fl_start < 0 || request->fl_end < 0)
5541 return -EINVAL;
5542
d953126a
TM		 5543 if (IS_GETLK(cmd)) {
5544 if (state != NULL)
5545 return nfs4_proc_getlk(state, F_GETLK, request);
5546 return 0;
5547 }
1da177e4
LT		 5548
5549 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5550 return -EINVAL;
5551
d953126a
TM		 5552 if (request->fl_type == F_UNLCK) {
5553 if (state != NULL)
5554 return nfs4_proc_unlck(state, cmd, request);
5555 return 0;
5556 }
1da177e4 5557
d953126a
TM		 5558 if (state == NULL)
5559 return -ENOLCK;
55725513
TM		 5560 /*
5561 * Don't rely on the VFS having checked the file open mode,
5562 * since it won't do this for flock() locks.
5563 */
f44106e2 5564 switch (request->fl_type) {
55725513
TM		 5565 case F_RDLCK:
5566 if (!(filp->f_mode & FMODE_READ))
5567 return -EBADF;
5568 break;
5569 case F_WRLCK:
5570 if (!(filp->f_mode & FMODE_WRITE))
5571 return -EBADF;
5572 }
5573
1da177e4
LT		 5574 do {
5575 status = nfs4_proc_setlk(state, cmd, request);
5576 if ((status != -EAGAIN) || IS_SETLK(cmd))
5577 break;
5578 timeout = nfs4_set_lock_task_retry(timeout);
5579 status = -ERESTARTSYS;
5580 if (signalled())
5581 break;
5582 } while(status < 0);
1da177e4
LT		 5583 return status;
5584}
5585
db4f2e63 5586int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5587{
5588 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5589 int err;
5590
5591 err = nfs4_set_lock_state(state, fl);
5592 if (err != 0)
db4f2e63 5593 return err;
4a706fa0 5594 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5595 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5596}
6b3b5496 5597
cf470c3e
TM		 5598struct nfs_release_lockowner_data {
5599 struct nfs4_lock_state *lsp;
5ae67c4f 5600 struct nfs_server *server;
cf470c3e
TM		 5601 struct nfs_release_lockowner_args args;
5602};
5603
d3c7b7cc
TM		 5604static void nfs4_release_lockowner_release(void *calldata)
5605{
cf470c3e 5606 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5607 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5608 kfree(calldata);
5609}
5610
17280175 5611static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5612 .rpc_release = nfs4_release_lockowner_release,
5613};
5614
c8b2d0bf 5615static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5616{
cf470c3e 5617 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5618 struct rpc_message msg = {
5619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5620 };
5621
5622 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5623 return -EINVAL;
5624 data = kmalloc(sizeof(*data), GFP_NOFS);
5625 if (!data)
5626 return -ENOMEM;
5627 data->lsp = lsp;
5ae67c4f 5628 data->server = server;
cf470c3e
TM		 5629 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5630 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5631 data->args.lock_owner.s_dev = server->s_dev;
5632 msg.rpc_argp = &data->args;
5633 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5634 return 0;
d3c7b7cc
TM		 5635}
5636
aa1870af
BF		 5637#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5638
64c2ce8b
AK		 5639static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5640 const void *buf, size_t buflen,
5641 int flags, int type)
6b3b5496 5642{
64c2ce8b
AK		 5643 if (strcmp(key, "") != 0)
5644 return -EINVAL;
4b580ee3 5645
64c2ce8b 5646 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5647}
5648
64c2ce8b
AK		 5649static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5650 void *buf, size_t buflen, int type)
6b3b5496 5651{
64c2ce8b
AK		 5652 if (strcmp(key, "") != 0)
5653 return -EINVAL;
aa1870af 5654
64c2ce8b 5655 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5656}
5657
64c2ce8b
AK		 5658static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5659 size_t list_len, const char *name,
5660 size_t name_len, int type)
6b3b5496 5661{
64c2ce8b 5662 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5663
096455a2
BF		 5664 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5665 return 0;
64c2ce8b
AK		 5666
5667 if (list && len <= list_len)
5668 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5669 return len;
6b3b5496
BF		 5670}
5671
c9bccef6
DQ		 5672#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5673static inline int nfs4_server_supports_labels(struct nfs_server *server)
5674{
5675 return server->caps & NFS_CAP_SECURITY_LABEL;
5676}
5677
5678static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5679 const void *buf, size_t buflen,
5680 int flags, int type)
5681{
5682 if (security_ismaclabel(key))
5683 return nfs4_set_security_label(dentry, buf, buflen);
5684
5685 return -EOPNOTSUPP;
5686}
5687
5688static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5689 void *buf, size_t buflen, int type)
5690{
5691 if (security_ismaclabel(key))
5692 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5693 return -EOPNOTSUPP;
5694}
5695
5696static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5697 size_t list_len, const char *name,
5698 size_t name_len, int type)
5699{
5700 size_t len = 0;
5701
5702 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5703 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5704 if (list && len <= list_len)
5705 security_inode_listsecurity(dentry->d_inode, list, len);
5706 }
5707 return len;
5708}
5709
5710static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5711 .prefix = XATTR_SECURITY_PREFIX,
5712 .list = nfs4_xattr_list_nfs4_label,
5713 .get = nfs4_xattr_get_nfs4_label,
5714 .set = nfs4_xattr_set_nfs4_label,
5715};
5716#endif
5717
5718
533eb461
AA		 5719/*
5720 * nfs_fhget will use either the mounted_on_fileid or the fileid
5721 */
69aaaae1
TM		 5722static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5723{
533eb461
AA		 5724 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5725 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5726 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5727 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5728 return;
5729
5730 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5731 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5732 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5733 fattr->nlink = 2;
5734}
5735
f05d147f
BS		 5736static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5737 const struct qstr *name,
5738 struct nfs4_fs_locations *fs_locations,
5739 struct page *page)
683b57b4
TM		 5740{
5741 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5742 u32 bitmask[3] = {
361e624f 5743 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5744 };
5745 struct nfs4_fs_locations_arg args = {
5746 .dir_fh = NFS_FH(dir),
c228fd3a 5747 .name = name,
683b57b4
TM		 5748 .page = page,
5749 .bitmask = bitmask,
5750 };
22958463
BH		 5751 struct nfs4_fs_locations_res res = {
5752 .fs_locations = fs_locations,
5753 };
683b57b4
TM		 5754 struct rpc_message msg = {
5755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5756 .rpc_argp = &args,
22958463 5757 .rpc_resp = &res,
683b57b4
TM		 5758 };
5759 int status;
5760
3110ff80 5761 dprintk("%s: start\n", __func__);
533eb461
AA		 5762
5763 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5764 * is not supported */
5765 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5766 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5767 else
5768 bitmask[0] |= FATTR4_WORD0_FILEID;
5769
c228fd3a 5770 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5771 fs_locations->server = server;
830b8e33 5772 fs_locations->nlocations = 0;
f05d147f 5773 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5774 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5775 return status;
5776}
5777
f05d147f
BS		 5778int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5779 const struct qstr *name,
5780 struct nfs4_fs_locations *fs_locations,
5781 struct page *page)
db0a9593
BS		 5782{
5783 struct nfs4_exception exception = { };
5784 int err;
5785 do {
5786 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5787 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5788 &exception);
5789 } while (exception.retry);
5790 return err;
5791}
5792
5a5ea0d4
BS		 5793static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5794{
5795 int status;
5796 struct nfs4_secinfo_arg args = {
5797 .dir_fh = NFS_FH(dir),
5798 .name = name,
5799 };
5800 struct nfs4_secinfo_res res = {
5801 .flavors = flavors,
5802 };
5803 struct rpc_message msg = {
5804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5805 .rpc_argp = &args,
5806 .rpc_resp = &res,
5807 };
5808
5809 dprintk("NFS call secinfo %s\n", name->name);
5810 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5811 dprintk("NFS reply secinfo: %d\n", status);
5812 return status;
5813}
5814
72de53ec
BS		 5815int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5816 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5817{
5818 struct nfs4_exception exception = { };
5819 int err;
5820 do {
5821 err = nfs4_handle_exception(NFS_SERVER(dir),
5822 _nfs4_proc_secinfo(dir, name, flavors),
5823 &exception);
5824 } while (exception.retry);
5825 return err;
5826}
5827
557134a3 5828#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5829/*
5830 * Check the exchange flags returned by the server for invalid flags, having
5831 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5832 * DS flags set.
5833 */
5834static int nfs4_check_cl_exchange_flags(u32 flags)
5835{
5836 if (flags & ~EXCHGID4_FLAG_MASK_R)
5837 goto out_inval;
5838 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5839 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5840 goto out_inval;
5841 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5842 goto out_inval;
5843 return NFS_OK;
5844out_inval:
5845 return -NFS4ERR_INVAL;
5846}
5847
78fe0f41 5848static bool
79d4e1f0
CL		 5849nfs41_same_server_scope(struct nfs41_server_scope *a,
5850 struct nfs41_server_scope *b)
78fe0f41
WAA		 5851{
5852 if (a->server_scope_sz == b->server_scope_sz &&
5853 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5854 return true;
5855
5856 return false;
5857}
5858
7c44f1ae
WAA		 5859/*
5860 * nfs4_proc_bind_conn_to_session()
5861 *
5862 * The 4.1 client currently uses the same TCP connection for the
5863 * fore and backchannel.
5864 */
2cf047c9 5865int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5866{
5867 int status;
5868 struct nfs41_bind_conn_to_session_res res;
5869 struct rpc_message msg = {
5870 .rpc_proc =
5871 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5872 .rpc_argp = clp,
5873 .rpc_resp = &res,
2cf047c9 5874 .rpc_cred = cred,
7c44f1ae
WAA		 5875 };
5876
5877 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5878
5879 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5880 if (unlikely(res.session == NULL)) {
5881 status = -ENOMEM;
5882 goto out;
5883 }
5884
5885 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5886 if (status == 0) {
5887 if (memcmp(res.session->sess_id.data,
5888 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5889 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5890 status = -EIO;
5891 goto out_session;
5892 }
5893 if (res.dir != NFS4_CDFS4_BOTH) {
5894 dprintk("NFS: %s: Unexpected direction from server\n",
5895 __func__);
5896 status = -EIO;
5897 goto out_session;
5898 }
5899 if (res.use_conn_in_rdma_mode) {
5900 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5901 __func__);
5902 status = -EIO;
5903 goto out_session;
5904 }
5905 }
5906out_session:
5907 kfree(res.session);
5908out:
5909 dprintk("<-- %s status= %d\n", __func__, status);
5910 return status;
5911}
5912
99fe60d0
BH		 5913/*
5914 * nfs4_proc_exchange_id()
5915 *
6bbb4ae8
CL		 5916 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5917 *
99fe60d0
BH		 5918 * Since the clientid has expired, all compounds using sessions
5919 * associated with the stale clientid will be returning
5920 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5921 * be in some phase of session reset.
5922 */
4d643d1d 5923int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5924{
5925 nfs4_verifier verifier;
5926 struct nfs41_exchange_id_args args = {
cd93710e 5927 .verifier = &verifier,
99fe60d0 5928 .client = clp,
4f0b429d
TM		 5929 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5930 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5931 };
5932 struct nfs41_exchange_id_res res = {
32b01310 5933 0
99fe60d0
BH		 5934 };
5935 int status;
5936 struct rpc_message msg = {
5937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5938 .rpc_argp = &args,
5939 .rpc_resp = &res,
5940 .rpc_cred = cred,
5941 };
99fe60d0 5942
f092075d 5943 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5944 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5945 sizeof(args.id));
6bbb4ae8
CL		 5946 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5947 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5948 args.id_len, args.id);
99fe60d0 5949
acdeb69d 5950 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5951 GFP_NOFS);
acdeb69d 5952 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5953 status = -ENOMEM;
5954 goto out;
5955 }
78fe0f41 5956
79d4e1f0 5957 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5958 GFP_NOFS);
177313f1 5959 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5960 status = -ENOMEM;
acdeb69d 5961 goto out_server_owner;
abe9a6d5 5962 }
78fe0f41 5963
bbafffd2 5964 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5965 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5966 status = -ENOMEM;
5967 goto out_server_scope;
5968 }
5969
1bd714f2 5970 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5971 if (status == 0)
32b01310 5972 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5973
acdeb69d 5974 if (status == 0) {
32b01310
TM		 5975 clp->cl_clientid = res.clientid;
5976 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5977 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5978 clp->cl_seqid = res.seqid;
5979
acdeb69d
CL		 5980 kfree(clp->cl_serverowner);
5981 clp->cl_serverowner = res.server_owner;
5982 res.server_owner = NULL;
78fe0f41 5983
7d2ed9ac 5984 /* use the most recent implementation id */
59155546
CL		 5985 kfree(clp->cl_implid);
5986 clp->cl_implid = res.impl_id;
7d2ed9ac 5987
177313f1 5988 if (clp->cl_serverscope != NULL &&
79d4e1f0 5989 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5990 res.server_scope)) {
5991 dprintk("%s: server_scope mismatch detected\n",
5992 __func__);
5993 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5994 kfree(clp->cl_serverscope);
5995 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5996 }
5997
177313f1 5998 if (clp->cl_serverscope == NULL) {
79d4e1f0 5999 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6000 goto out;
6001 }
32b01310
TM		 6002 } else
6003 kfree(res.impl_id);
7d2ed9ac 6004
acdeb69d
CL		 6005out_server_owner:
6006 kfree(res.server_owner);
7d2ed9ac 6007out_server_scope:
abe9a6d5
WAA		 6008 kfree(res.server_scope);
6009out:
177313f1 6010 if (clp->cl_implid != NULL)
6bbb4ae8 6011 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6012 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6013 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6014 clp->cl_implid->date.seconds,
6015 clp->cl_implid->date.nseconds);
6bbb4ae8 6016 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6017 return status;
6018}
6019
66245539
TM		 6020static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6021 struct rpc_cred *cred)
6022{
6023 struct rpc_message msg = {
6024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6025 .rpc_argp = clp,
6026 .rpc_cred = cred,
6027 };
6028 int status;
6029
6030 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6031 if (status)
02c67525 6032 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6033 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6034 return status;
6035}
6036
6037static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6038 struct rpc_cred *cred)
6039{
6040 unsigned int loop;
6041 int ret;
6042
6043 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6044 ret = _nfs4_proc_destroy_clientid(clp, cred);
6045 switch (ret) {
6046 case -NFS4ERR_DELAY:
6047 case -NFS4ERR_CLIENTID_BUSY:
6048 ssleep(1);
6049 break;
6050 default:
6051 return ret;
6052 }
6053 }
6054 return 0;
6055}
6056
6057int nfs4_destroy_clientid(struct nfs_client *clp)
6058{
6059 struct rpc_cred *cred;
6060 int ret = 0;
6061
6062 if (clp->cl_mvops->minor_version < 1)
6063 goto out;
6064 if (clp->cl_exchange_flags == 0)
6065 goto out;
05f4c350
CL		 6066 if (clp->cl_preserve_clid)
6067 goto out;
66245539
TM		 6068 cred = nfs4_get_exchange_id_cred(clp);
6069 ret = nfs4_proc_destroy_clientid(clp, cred);
6070 if (cred)
6071 put_rpccred(cred);
6072 switch (ret) {
6073 case 0:
6074 case -NFS4ERR_STALE_CLIENTID:
6075 clp->cl_exchange_flags = 0;
6076 }
6077out:
6078 return ret;
6079}
6080
2050f0cc
AA		 6081struct nfs4_get_lease_time_data {
6082 struct nfs4_get_lease_time_args *args;
6083 struct nfs4_get_lease_time_res *res;
6084 struct nfs_client *clp;
6085};
6086
6087static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6088 void *calldata)
6089{
2050f0cc
AA		 6090 struct nfs4_get_lease_time_data *data =
6091 (struct nfs4_get_lease_time_data *)calldata;
6092
6093 dprintk("--> %s\n", __func__);
6094 /* just setup sequence, do not trigger session recovery
6095 since we're invoked within one */
d9afbd1b
TM		 6096 nfs41_setup_sequence(data->clp->cl_session,
6097 &data->args->la_seq_args,
6098 &data->res->lr_seq_res,
6099 task);
2050f0cc
AA		 6100 dprintk("<-- %s\n", __func__);
6101}
6102
6103/*
6104 * Called from nfs4_state_manager thread for session setup, so don't recover
6105 * from sequence operation or clientid errors.
6106 */
6107static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6108{
6109 struct nfs4_get_lease_time_data *data =
6110 (struct nfs4_get_lease_time_data *)calldata;
6111
6112 dprintk("--> %s\n", __func__);
14516c3a
TM		 6113 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6114 return;
2050f0cc
AA		 6115 switch (task->tk_status) {
6116 case -NFS4ERR_DELAY:
6117 case -NFS4ERR_GRACE:
6118 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6119 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6120 task->tk_status = 0;
a8a4ae3a
AA		 6121 /* fall through */
6122 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6123 rpc_restart_call_prepare(task);
2050f0cc
AA		 6124 return;
6125 }
2050f0cc
AA		 6126 dprintk("<-- %s\n", __func__);
6127}
6128
17280175 6129static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6130 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6131 .rpc_call_done = nfs4_get_lease_time_done,
6132};
6133
6134int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6135{
6136 struct rpc_task *task;
6137 struct nfs4_get_lease_time_args args;
6138 struct nfs4_get_lease_time_res res = {
6139 .lr_fsinfo = fsinfo,
6140 };
6141 struct nfs4_get_lease_time_data data = {
6142 .args = &args,
6143 .res = &res,
6144 .clp = clp,
6145 };
6146 struct rpc_message msg = {
6147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6148 .rpc_argp = &args,
6149 .rpc_resp = &res,
6150 };
6151 struct rpc_task_setup task_setup = {
6152 .rpc_client = clp->cl_rpcclient,
6153 .rpc_message = &msg,
6154 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6155 .callback_data = &data,
6156 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6157 };
6158 int status;
6159
9d12b216 6160 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6161 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6162 dprintk("--> %s\n", __func__);
6163 task = rpc_run_task(&task_setup);
6164
6165 if (IS_ERR(task))
6166 status = PTR_ERR(task);
6167 else {
6168 status = task->tk_status;
6169 rpc_put_task(task);
6170 }
6171 dprintk("<-- %s return %d\n", __func__, status);
6172
6173 return status;
6174}
6175
fc931582
AA		 6176/*
6177 * Initialize the values to be used by the client in CREATE_SESSION
6178 * If nfs4_init_session set the fore channel request and response sizes,
6179 * use them.
6180 *
6181 * Set the back channel max_resp_sz_cached to zero to force the client to
6182 * always set csa_cachethis to FALSE because the current implementation
6183 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6184 */
6185static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6186{
18aad3d5
AA		 6187 unsigned int max_rqst_sz, max_resp_sz;
6188
6189 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6190 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6191
fc931582 6192 /* Fore channel attributes */
18aad3d5
AA		 6193 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6194 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6195 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6196 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6197
6198 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6199 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6200 __func__,
6201 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6202 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6203
6204 /* Back channel attributes */
fc931582
AA		 6205 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6206 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6207 args->bc_attrs.max_resp_sz_cached = 0;
6208 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6209 args->bc_attrs.max_reqs = 1;
6210
6211 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6212 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6213 __func__,
6214 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6215 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6216 args->bc_attrs.max_reqs);
6217}
6218
43c2e885 6219static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6220{
43c2e885
BF		 6221 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6222 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6223
43c2e885
BF		 6224 if (rcvd->max_resp_sz > sent->max_resp_sz)
6225 return -EINVAL;
6226 /*
6227 * Our requested max_ops is the minimum we need; we're not
6228 * prepared to break up compounds into smaller pieces than that.
6229 * So, no point even trying to continue if the server won't
6230 * cooperate:
6231 */
6232 if (rcvd->max_ops < sent->max_ops)
6233 return -EINVAL;
6234 if (rcvd->max_reqs == 0)
6235 return -EINVAL;
b4b9a0c1
VG		 6236 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6237 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6238 return 0;
8d35301d
AA		 6239}
6240
43c2e885
BF		 6241static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6242{
6243 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6244 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6245
43c2e885
BF		 6246 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6247 return -EINVAL;
6248 if (rcvd->max_resp_sz < sent->max_resp_sz)
6249 return -EINVAL;
6250 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6251 return -EINVAL;
6252 /* These would render the backchannel useless: */
b4b9a0c1 6253 if (rcvd->max_ops != sent->max_ops)
43c2e885 6254 return -EINVAL;
b4b9a0c1 6255 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6256 return -EINVAL;
6257 return 0;
6258}
8d35301d 6259
8d35301d
AA		 6260static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6261 struct nfs4_session *session)
6262{
43c2e885 6263 int ret;
8d35301d 6264
43c2e885
BF		 6265 ret = nfs4_verify_fore_channel_attrs(args, session);
6266 if (ret)
6267 return ret;
6268 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6269}
6270
848f5bda
TM		 6271static int _nfs4_proc_create_session(struct nfs_client *clp,
6272 struct rpc_cred *cred)
fc931582
AA		 6273{
6274 struct nfs4_session *session = clp->cl_session;
6275 struct nfs41_create_session_args args = {
6276 .client = clp,
6277 .cb_program = NFS4_CALLBACK,
6278 };
6279 struct nfs41_create_session_res res = {
6280 .client = clp,
6281 };
6282 struct rpc_message msg = {
6283 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6284 .rpc_argp = &args,
6285 .rpc_resp = &res,
848f5bda 6286 .rpc_cred = cred,
fc931582
AA		 6287 };
6288 int status;
6289
6290 nfs4_init_channel_attrs(&args);
0f91421e 6291 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6292
1bd714f2 6293 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 6294
43095d39 6295 if (!status) {
8d35301d
AA		 6296 /* Verify the session's negotiated channel_attrs values */
6297 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6298 /* Increment the clientid slot sequence id */
6299 clp->cl_seqid++;
6300 }
6301
6302 return status;
6303}
6304
6305/*
6306 * Issues a CREATE_SESSION operation to the server.
6307 * It is the responsibility of the caller to verify the session is
6308 * expired before calling this routine.
6309 */
848f5bda 6310int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6311{
6312 int status;
6313 unsigned *ptr;
fc931582
AA		 6314 struct nfs4_session *session = clp->cl_session;
6315
6316 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6317
848f5bda 6318 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6319 if (status)
6320 goto out;
6321
aacd5537
AA		 6322 /* Init or reset the session slot tables */
6323 status = nfs4_setup_session_slot_tables(session);
6324 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6325 if (status)
6326 goto out;
6327
6328 ptr = (unsigned *)&session->sess_id.data[0];
6329 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6330 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6331out:
6332 dprintk("<-- %s\n", __func__);
6333 return status;
6334}
6335
0f3e66c6
AA		 6336/*
6337 * Issue the over-the-wire RPC DESTROY_SESSION.
6338 * The caller must serialize access to this routine.
6339 */
848f5bda
TM		 6340int nfs4_proc_destroy_session(struct nfs4_session *session,
6341 struct rpc_cred *cred)
0f3e66c6 6342{
848f5bda
TM		 6343 struct rpc_message msg = {
6344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6345 .rpc_argp = session,
6346 .rpc_cred = cred,
6347 };
0f3e66c6 6348 int status = 0;
0f3e66c6
AA		 6349
6350 dprintk("--> nfs4_proc_destroy_session\n");
6351
6352 /* session is still being setup */
6353 if (session->clp->cl_cons_state != NFS_CS_READY)
6354 return status;
6355
1bd714f2 6356 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 6357
6358 if (status)
08106ac7 6359 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6360 "Session has been destroyed regardless...\n", status);
6361
6362 dprintk("<-- nfs4_proc_destroy_session\n");
6363 return status;
6364}
6365
fc01cea9
AA		 6366/*
6367 * Renew the cl_session lease.
6368 */
d5f8d3fe
TM		 6369struct nfs4_sequence_data {
6370 struct nfs_client *clp;
6371 struct nfs4_sequence_args args;
6372 struct nfs4_sequence_res res;
6373};
6374
dc96aef9
AB		 6375static void nfs41_sequence_release(void *data)
6376{
d5f8d3fe
TM		 6377 struct nfs4_sequence_data *calldata = data;
6378 struct nfs_client *clp = calldata->clp;
dc96aef9 6379
7135840f
AB		 6380 if (atomic_read(&clp->cl_count) > 1)
6381 nfs4_schedule_state_renewal(clp);
6382 nfs_put_client(clp);
d5f8d3fe 6383 kfree(calldata);
dc96aef9
AB		 6384}
6385
aa5190d0
TM		 6386static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6387{
6388 switch(task->tk_status) {
6389 case -NFS4ERR_DELAY:
aa5190d0
TM		 6390 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6391 return -EAGAIN;
6392 default:
0400a6b0 6393 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6394 }
6395 return 0;
6396}
6397
dc96aef9 6398static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6399{
d5f8d3fe
TM		 6400 struct nfs4_sequence_data *calldata = data;
6401 struct nfs_client *clp = calldata->clp;
fc01cea9 6402
14516c3a
TM		 6403 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6404 return;
fc01cea9
AA		 6405
6406 if (task->tk_status < 0) {
6407 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6408 if (atomic_read(&clp->cl_count) == 1)
6409 goto out;
fc01cea9 6410
aa5190d0
TM		 6411 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6412 rpc_restart_call_prepare(task);
fc01cea9
AA		 6413 return;
6414 }
6415 }
fc01cea9 6416 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6417out:
fc01cea9
AA		 6418 dprintk("<-- %s\n", __func__);
6419}
6420
6421static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6422{
d5f8d3fe
TM		 6423 struct nfs4_sequence_data *calldata = data;
6424 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6425 struct nfs4_sequence_args *args;
6426 struct nfs4_sequence_res *res;
6427
fc01cea9
AA		 6428 args = task->tk_msg.rpc_argp;
6429 res = task->tk_msg.rpc_resp;
6430
d9afbd1b 6431 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6432}
6433
6434static const struct rpc_call_ops nfs41_sequence_ops = {
6435 .rpc_call_done = nfs41_sequence_call_done,
6436 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6437 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6438};
6439
8fe72bac
TM		 6440static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6441 struct rpc_cred *cred,
6442 bool is_privileged)
fc01cea9 6443{
d5f8d3fe 6444 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6445 struct rpc_message msg = {
6446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6447 .rpc_cred = cred,
6448 };
71ac6da9
TM		 6449 struct rpc_task_setup task_setup_data = {
6450 .rpc_client = clp->cl_rpcclient,
6451 .rpc_message = &msg,
8fe72bac 6452 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6453 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6454 };
fc01cea9 6455
7135840f 6456 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6457 return ERR_PTR(-EIO);
dfb4f309 6458 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6459 if (calldata == NULL) {
7135840f 6460 nfs_put_client(clp);
71ac6da9 6461 return ERR_PTR(-ENOMEM);
fc01cea9 6462 }
9d12b216 6463 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6464 if (is_privileged)
6465 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6466 msg.rpc_argp = &calldata->args;
6467 msg.rpc_resp = &calldata->res;
6468 calldata->clp = clp;
71ac6da9 6469 task_setup_data.callback_data = calldata;
fc01cea9 6470
71ac6da9
TM		 6471 return rpc_run_task(&task_setup_data);
6472}
6473
2f60ea6b 6474static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6475{
6476 struct rpc_task *task;
6477 int ret = 0;
6478
2f60ea6b
TM		 6479 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6480 return 0;
8fe72bac 6481 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6482 if (IS_ERR(task))
6483 ret = PTR_ERR(task);
6484 else
bf294b41 6485 rpc_put_task_async(task);
71ac6da9
TM		 6486 dprintk("<-- %s status=%d\n", __func__, ret);
6487 return ret;
6488}
6489
6490static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6491{
6492 struct rpc_task *task;
6493 int ret;
6494
8fe72bac 6495 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6496 if (IS_ERR(task)) {
6497 ret = PTR_ERR(task);
6498 goto out;
6499 }
6500 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6501 if (!ret) {
6502 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6503
6504 if (task->tk_status == 0)
6505 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6506 ret = task->tk_status;
b4410c2f 6507 }
71ac6da9
TM		 6508 rpc_put_task(task);
6509out:
6510 dprintk("<-- %s status=%d\n", __func__, ret);
6511 return ret;
fc01cea9
AA		 6512}
6513
fce5c838
RL		 6514struct nfs4_reclaim_complete_data {
6515 struct nfs_client *clp;
6516 struct nfs41_reclaim_complete_args arg;
6517 struct nfs41_reclaim_complete_res res;
6518};
6519
6520static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6521{
6522 struct nfs4_reclaim_complete_data *calldata = data;
6523
d9afbd1b
TM		 6524 nfs41_setup_sequence(calldata->clp->cl_session,
6525 &calldata->arg.seq_args,
6526 &calldata->res.seq_res,
6527 task);
fce5c838
RL		 6528}
6529
aa5190d0
TM		 6530static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6531{
6532 switch(task->tk_status) {
6533 case 0:
6534 case -NFS4ERR_COMPLETE_ALREADY:
6535 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6536 break;
6537 case -NFS4ERR_DELAY:
aa5190d0 6538 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6539 /* fall through */
6540 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6541 return -EAGAIN;
6542 default:
0400a6b0 6543 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6544 }
6545 return 0;
6546}
6547
fce5c838
RL		 6548static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6549{
6550 struct nfs4_reclaim_complete_data *calldata = data;
6551 struct nfs_client *clp = calldata->clp;
6552 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6553
6554 dprintk("--> %s\n", __func__);
14516c3a
TM		 6555 if (!nfs41_sequence_done(task, res))
6556 return;
fce5c838 6557
aa5190d0
TM		 6558 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6559 rpc_restart_call_prepare(task);
6560 return;
6561 }
fce5c838
RL		 6562 dprintk("<-- %s\n", __func__);
6563}
6564
6565static void nfs4_free_reclaim_complete_data(void *data)
6566{
6567 struct nfs4_reclaim_complete_data *calldata = data;
6568
6569 kfree(calldata);
6570}
6571
6572static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6573 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6574 .rpc_call_done = nfs4_reclaim_complete_done,
6575 .rpc_release = nfs4_free_reclaim_complete_data,
6576};
6577
6578/*
6579 * Issue a global reclaim complete.
6580 */
965e9c23
TM		 6581static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6582 struct rpc_cred *cred)
fce5c838
RL		 6583{
6584 struct nfs4_reclaim_complete_data *calldata;
6585 struct rpc_task *task;
6586 struct rpc_message msg = {
6587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6588 .rpc_cred = cred,
fce5c838
RL		 6589 };
6590 struct rpc_task_setup task_setup_data = {
6591 .rpc_client = clp->cl_rpcclient,
6592 .rpc_message = &msg,
6593 .callback_ops = &nfs4_reclaim_complete_call_ops,
6594 .flags = RPC_TASK_ASYNC,
6595 };
6596 int status = -ENOMEM;
6597
6598 dprintk("--> %s\n", __func__);
8535b2be 6599 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6600 if (calldata == NULL)
6601 goto out;
6602 calldata->clp = clp;
6603 calldata->arg.one_fs = 0;
fce5c838 6604
9d12b216 6605 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6606 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6607 msg.rpc_argp = &calldata->arg;
6608 msg.rpc_resp = &calldata->res;
6609 task_setup_data.callback_data = calldata;
6610 task = rpc_run_task(&task_setup_data);
acf82b85 6611 if (IS_ERR(task)) {
fce5c838 6612 status = PTR_ERR(task);
acf82b85
DC		 6613 goto out;
6614 }
c34c32ea
AA		 6615 status = nfs4_wait_for_completion_rpc_task(task);
6616 if (status == 0)
6617 status = task->tk_status;
fce5c838 6618 rpc_put_task(task);
acf82b85 6619 return 0;
fce5c838
RL		 6620out:
6621 dprintk("<-- %s status=%d\n", __func__, status);
6622 return status;
6623}
b1f69b75
AA		 6624
6625static void
6626nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6627{
6628 struct nfs4_layoutget *lgp = calldata;
c31663d4 6629 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6630 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6631
6632 dprintk("--> %s\n", __func__);
c31663d4
FI		 6633 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6634 * right now covering the LAYOUTGET we are about to send.
6635 * However, that is not so catastrophic, and there seems
6636 * to be no way to prevent it completely.
6637 */
6ba7db34 6638 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6639 &lgp->res.seq_res, task))
b1f69b75 6640 return;
cf7d63f1
FI		 6641 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6642 NFS_I(lgp->args.inode)->layout,
6643 lgp->args.ctx->state)) {
6644 rpc_exit(task, NFS4_OK);
cf7d63f1 6645 }
b1f69b75
AA		 6646}
6647
6648static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6649{
6650 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6651 struct inode *inode = lgp->args.inode;
6652 struct nfs_server *server = NFS_SERVER(inode);
6653 struct pnfs_layout_hdr *lo;
6654 struct nfs4_state *state = NULL;
30005121 6655 unsigned long timeo, giveup;
b1f69b75
AA		 6656
6657 dprintk("--> %s\n", __func__);
6658
6ba7db34 6659 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6660 goto out;
b1f69b75
AA		 6661
6662 switch (task->tk_status) {
6663 case 0:
ee314c2a 6664 goto out;
b1f69b75
AA		 6665 case -NFS4ERR_LAYOUTTRYLATER:
6666 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6667 timeo = rpc_get_timeout(task->tk_client);
6668 giveup = lgp->args.timestamp + timeo;
6669 if (time_after(giveup, jiffies))
6670 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6671 break;
6672 case -NFS4ERR_EXPIRED:
6673 case -NFS4ERR_BAD_STATEID:
6674 spin_lock(&inode->i_lock);
6675 lo = NFS_I(inode)->layout;
6676 if (!lo || list_empty(&lo->plh_segs)) {
6677 spin_unlock(&inode->i_lock);
6678 /* If the open stateid was bad, then recover it. */
6679 state = lgp->args.ctx->state;
6680 } else {
6681 LIST_HEAD(head);
6682
6683 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6684 spin_unlock(&inode->i_lock);
6685 /* Mark the bad layout state as invalid, then
6686 * retry using the open stateid. */
6687 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6688 }
6689 }
ee314c2a
TM		 6690 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6691 rpc_restart_call_prepare(task);
6692out:
b1f69b75
AA		 6693 dprintk("<-- %s\n", __func__);
6694}
6695
8554116e
IK		 6696static size_t max_response_pages(struct nfs_server *server)
6697{
6698 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6699 return nfs_page_array_len(0, max_resp_sz);
6700}
6701
6702static void nfs4_free_pages(struct page **pages, size_t size)
6703{
6704 int i;
6705
6706 if (!pages)
6707 return;
6708
6709 for (i = 0; i < size; i++) {
6710 if (!pages[i])
6711 break;
6712 __free_page(pages[i]);
6713 }
6714 kfree(pages);
6715}
6716
6717static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6718{
6719 struct page **pages;
6720 int i;
6721
6722 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6723 if (!pages) {
6724 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6725 return NULL;
6726 }
6727
6728 for (i = 0; i < size; i++) {
6729 pages[i] = alloc_page(gfp_flags);
6730 if (!pages[i]) {
6731 dprintk("%s: failed to allocate page\n", __func__);
6732 nfs4_free_pages(pages, size);
6733 return NULL;
6734 }
6735 }
6736
6737 return pages;
6738}
6739
b1f69b75
AA		 6740static void nfs4_layoutget_release(void *calldata)
6741{
6742 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6743 struct inode *inode = lgp->args.inode;
6744 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6745 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6746
6747 dprintk("--> %s\n", __func__);
8554116e 6748 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6749 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6750 put_nfs_open_context(lgp->args.ctx);
6751 kfree(calldata);
6752 dprintk("<-- %s\n", __func__);
6753}
6754
6755static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6756 .rpc_call_prepare = nfs4_layoutget_prepare,
6757 .rpc_call_done = nfs4_layoutget_done,
6758 .rpc_release = nfs4_layoutget_release,
6759};
6760
a0b0a6e3
TM		 6761struct pnfs_layout_segment *
6762nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6763{
a47970ff
WAA		 6764 struct inode *inode = lgp->args.inode;
6765 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6766 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6767 struct rpc_task *task;
6768 struct rpc_message msg = {
6769 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6770 .rpc_argp = &lgp->args,
6771 .rpc_resp = &lgp->res,
6ab59344 6772 .rpc_cred = lgp->cred,
b1f69b75
AA		 6773 };
6774 struct rpc_task_setup task_setup_data = {
6775 .rpc_client = server->client,
6776 .rpc_message = &msg,
6777 .callback_ops = &nfs4_layoutget_call_ops,
6778 .callback_data = lgp,
6779 .flags = RPC_TASK_ASYNC,
6780 };
a0b0a6e3 6781 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6782 int status = 0;
6783
6784 dprintk("--> %s\n", __func__);
6785
8554116e
IK		 6786 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6787 if (!lgp->args.layout.pages) {
6788 nfs4_layoutget_release(lgp);
a0b0a6e3 6789 return ERR_PTR(-ENOMEM);
8554116e
IK		 6790 }
6791 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6792 lgp->args.timestamp = jiffies;
8554116e 6793
35124a09 6794 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6795 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6796 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6797
6798 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6799 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6800
b1f69b75
AA		 6801 task = rpc_run_task(&task_setup_data);
6802 if (IS_ERR(task))
a0b0a6e3 6803 return ERR_CAST(task);
b1f69b75 6804 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6805 if (status == 0)
6806 status = task->tk_status;
085b7a45
WAA		 6807 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6808 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6809 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6810 rpc_put_task(task);
6811 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6812 if (status)
6813 return ERR_PTR(status);
6814 return lseg;
b1f69b75
AA		 6815}
6816
cbe82603
BH		 6817static void
6818nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6819{
6820 struct nfs4_layoutreturn *lrp = calldata;
6821
6822 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6823 nfs41_setup_sequence(lrp->clp->cl_session,
6824 &lrp->args.seq_args,
6825 &lrp->res.seq_res,
6826 task);
cbe82603
BH		 6827}
6828
6829static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6830{
6831 struct nfs4_layoutreturn *lrp = calldata;
6832 struct nfs_server *server;
6833
6834 dprintk("--> %s\n", __func__);
6835
6ba7db34 6836 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6837 return;
6838
6839 server = NFS_SERVER(lrp->args.inode);
6840 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6841 rpc_restart_call_prepare(task);
cbe82603
BH		 6842 return;
6843 }
cbe82603
BH		 6844 dprintk("<-- %s\n", __func__);
6845}
6846
6847static void nfs4_layoutreturn_release(void *calldata)
6848{
6849 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6850 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6851
6852 dprintk("--> %s\n", __func__);
849b286f
TM		 6853 spin_lock(&lo->plh_inode->i_lock);
6854 if (lrp->res.lrs_present)
6855 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6856 lo->plh_block_lgets--;
6857 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6858 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6859 kfree(calldata);
6860 dprintk("<-- %s\n", __func__);
6861}
6862
6863static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6864 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6865 .rpc_call_done = nfs4_layoutreturn_done,
6866 .rpc_release = nfs4_layoutreturn_release,
6867};
6868
6869int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6870{
6871 struct rpc_task *task;
6872 struct rpc_message msg = {
6873 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6874 .rpc_argp = &lrp->args,
6875 .rpc_resp = &lrp->res,
9556000d 6876 .rpc_cred = lrp->cred,
cbe82603
BH		 6877 };
6878 struct rpc_task_setup task_setup_data = {
6879 .rpc_client = lrp->clp->cl_rpcclient,
6880 .rpc_message = &msg,
6881 .callback_ops = &nfs4_layoutreturn_call_ops,
6882 .callback_data = lrp,
6883 };
6884 int status;
6885
6886 dprintk("--> %s\n", __func__);
9d12b216 6887 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6888 task = rpc_run_task(&task_setup_data);
6889 if (IS_ERR(task))
6890 return PTR_ERR(task);
6891 status = task->tk_status;
6892 dprintk("<-- %s status=%d\n", __func__, status);
6893 rpc_put_task(task);
6894 return status;
6895}
6896
7f11d8d3
AA		 6897/*
6898 * Retrieve the list of Data Server devices from the MDS.
6899 */
6900static int _nfs4_getdevicelist(struct nfs_server *server,
6901 const struct nfs_fh *fh,
6902 struct pnfs_devicelist *devlist)
6903{
6904 struct nfs4_getdevicelist_args args = {
6905 .fh = fh,
6906 .layoutclass = server->pnfs_curr_ld->id,
6907 };
6908 struct nfs4_getdevicelist_res res = {
6909 .devlist = devlist,
6910 };
6911 struct rpc_message msg = {
6912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6913 .rpc_argp = &args,
6914 .rpc_resp = &res,
6915 };
6916 int status;
6917
6918 dprintk("--> %s\n", __func__);
6919 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6920 &res.seq_res, 0);
6921 dprintk("<-- %s status=%d\n", __func__, status);
6922 return status;
6923}
6924
6925int nfs4_proc_getdevicelist(struct nfs_server *server,
6926 const struct nfs_fh *fh,
6927 struct pnfs_devicelist *devlist)
6928{
6929 struct nfs4_exception exception = { };
6930 int err;
6931
6932 do {
6933 err = nfs4_handle_exception(server,
6934 _nfs4_getdevicelist(server, fh, devlist),
6935 &exception);
6936 } while (exception.retry);
6937
6938 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6939 err, devlist->num_devs);
6940
6941 return err;
6942}
6943EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6944
b1f69b75 6945static int
cd5875fe
TM		 6946_nfs4_proc_getdeviceinfo(struct nfs_server *server,
6947 struct pnfs_device *pdev,
6948 struct rpc_cred *cred)
b1f69b75
AA		 6949{
6950 struct nfs4_getdeviceinfo_args args = {
6951 .pdev = pdev,
6952 };
6953 struct nfs4_getdeviceinfo_res res = {
6954 .pdev = pdev,
6955 };
6956 struct rpc_message msg = {
6957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6958 .rpc_argp = &args,
6959 .rpc_resp = &res,
cd5875fe 6960 .rpc_cred = cred,
b1f69b75
AA		 6961 };
6962 int status;
6963
6964 dprintk("--> %s\n", __func__);
7c513058 6965 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6966 dprintk("<-- %s status=%d\n", __func__, status);
6967
6968 return status;
6969}
6970
cd5875fe
TM		 6971int nfs4_proc_getdeviceinfo(struct nfs_server *server,
6972 struct pnfs_device *pdev,
6973 struct rpc_cred *cred)
b1f69b75
AA		 6974{
6975 struct nfs4_exception exception = { };
6976 int err;
6977
6978 do {
6979 err = nfs4_handle_exception(server,
cd5875fe 6980 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 6981 &exception);
6982 } while (exception.retry);
6983 return err;
6984}
6985EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6986
863a3c6c
AA		 6987static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6988{
6989 struct nfs4_layoutcommit_data *data = calldata;
6990 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6991 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6992
d9afbd1b
TM		 6993 nfs41_setup_sequence(session,
6994 &data->args.seq_args,
6995 &data->res.seq_res,
6996 task);
863a3c6c
AA		 6997}
6998
6999static void
7000nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7001{
7002 struct nfs4_layoutcommit_data *data = calldata;
7003 struct nfs_server *server = NFS_SERVER(data->args.inode);
7004
6ba7db34 7005 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7006 return;
7007
7008 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7009 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7010 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7011 case -NFS4ERR_BADLAYOUT: /* no layout */
7012 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7013 task->tk_status = 0;
e59d27e0
TM		 7014 break;
7015 case 0:
863a3c6c
AA		 7016 nfs_post_op_update_inode_force_wcc(data->args.inode,
7017 data->res.fattr);
e59d27e0
TM		 7018 break;
7019 default:
7020 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7021 rpc_restart_call_prepare(task);
7022 return;
7023 }
7024 }
863a3c6c
AA		 7025}
7026
7027static void nfs4_layoutcommit_release(void *calldata)
7028{
7029 struct nfs4_layoutcommit_data *data = calldata;
7030
db29c089 7031 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7032 put_rpccred(data->cred);
7033 kfree(data);
7034}
7035
7036static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7037 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7038 .rpc_call_done = nfs4_layoutcommit_done,
7039 .rpc_release = nfs4_layoutcommit_release,
7040};
7041
7042int
ef311537 7043nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7044{
7045 struct rpc_message msg = {
7046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7047 .rpc_argp = &data->args,
7048 .rpc_resp = &data->res,
7049 .rpc_cred = data->cred,
7050 };
7051 struct rpc_task_setup task_setup_data = {
7052 .task = &data->task,
7053 .rpc_client = NFS_CLIENT(data->args.inode),
7054 .rpc_message = &msg,
7055 .callback_ops = &nfs4_layoutcommit_ops,
7056 .callback_data = data,
7057 .flags = RPC_TASK_ASYNC,
7058 };
7059 struct rpc_task *task;
7060 int status = 0;
7061
7062 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7063 "lbw: %llu inode %lu\n",
7064 data->task.tk_pid, sync,
7065 data->args.lastbytewritten,
7066 data->args.inode->i_ino);
7067
9d12b216 7068 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7069 task = rpc_run_task(&task_setup_data);
7070 if (IS_ERR(task))
7071 return PTR_ERR(task);
ef311537 7072 if (sync == false)
863a3c6c
AA		 7073 goto out;
7074 status = nfs4_wait_for_completion_rpc_task(task);
7075 if (status != 0)
7076 goto out;
7077 status = task->tk_status;
7078out:
7079 dprintk("%s: status %d\n", __func__, status);
7080 rpc_put_task(task);
7081 return status;
7082}
fca78d6d
BS		 7083
7084static int
7085_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7086 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7087{
7088 struct nfs41_secinfo_no_name_args args = {
7089 .style = SECINFO_STYLE_CURRENT_FH,
7090 };
7091 struct nfs4_secinfo_res res = {
7092 .flavors = flavors,
7093 };
7094 struct rpc_message msg = {
7095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7096 .rpc_argp = &args,
7097 .rpc_resp = &res,
7098 };
7099 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7100}
7101
7102static int
7103nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7104 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7105{
7106 struct nfs4_exception exception = { };
7107 int err;
7108 do {
7109 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7110 switch (err) {
7111 case 0:
7112 case -NFS4ERR_WRONGSEC:
7113 case -NFS4ERR_NOTSUPP:
05e9cfb4 7114 goto out;
fca78d6d
BS		 7115 default:
7116 err = nfs4_handle_exception(server, err, &exception);
7117 }
7118 } while (exception.retry);
05e9cfb4 7119out:
fca78d6d
BS		 7120 return err;
7121}
7122
7123static int
7124nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7125 struct nfs_fsinfo *info)
7126{
7127 int err;
7128 struct page *page;
7129 rpc_authflavor_t flavor;
7130 struct nfs4_secinfo_flavors *flavors;
7131
7132 page = alloc_page(GFP_KERNEL);
7133 if (!page) {
7134 err = -ENOMEM;
7135 goto out;
7136 }
7137
7138 flavors = page_address(page);
7139 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7140
7141 /*
7142 * Fall back on "guess and check" method if
7143 * the server doesn't support SECINFO_NO_NAME
7144 */
7145 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7146 err = nfs4_find_root_sec(server, fhandle, info);
7147 goto out_freepage;
7148 }
7149 if (err)
7150 goto out_freepage;
7151
7152 flavor = nfs_find_best_sec(flavors);
7153 if (err == 0)
7154 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7155
7156out_freepage:
7157 put_page(page);
7158 if (err == -EACCES)
7159 return -EPERM;
7160out:
7161 return err;
7162}
1cab0652 7163
ab7cb0df
TM		 7164static int _nfs41_test_stateid(struct nfs_server *server,
7165 nfs4_stateid *stateid,
7166 struct rpc_cred *cred)
7d974794
BS		 7167{
7168 int status;
7169 struct nfs41_test_stateid_args args = {
1cab0652 7170 .stateid = stateid,
7d974794
BS		 7171 };
7172 struct nfs41_test_stateid_res res;
7173 struct rpc_message msg = {
7174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7175 .rpc_argp = &args,
7176 .rpc_resp = &res,
ab7cb0df 7177 .rpc_cred = cred,
7d974794 7178 };
1cab0652 7179
38527b15 7180 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7181 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7182 nfs4_set_sequence_privileged(&args.seq_args);
7183 status = nfs4_call_sync_sequence(server->client, server, &msg,
7184 &args.seq_args, &res.seq_res);
38527b15
CL		 7185 if (status != NFS_OK) {
7186 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7187 return status;
38527b15
CL		 7188 }
7189 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7190 return -res.status;
7d974794
BS		 7191}
7192
38527b15
CL		 7193/**
7194 * nfs41_test_stateid - perform a TEST_STATEID operation
7195 *
7196 * @server: server / transport on which to perform the operation
7197 * @stateid: state ID to test
ab7cb0df 7198 * @cred: credential
38527b15
CL		 7199 *
7200 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7201 * Otherwise a negative NFS4ERR value is returned if the operation
7202 * failed or the state ID is not currently valid.
7203 */
ab7cb0df
TM		 7204static int nfs41_test_stateid(struct nfs_server *server,
7205 nfs4_stateid *stateid,
7206 struct rpc_cred *cred)
7d974794
BS		 7207{
7208 struct nfs4_exception exception = { };
7209 int err;
7210 do {
ab7cb0df 7211 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7212 if (err != -NFS4ERR_DELAY)
7213 break;
7214 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7215 } while (exception.retry);
7216 return err;
7217}
9aeda35f 7218
7c1d5fae
TM		 7219struct nfs_free_stateid_data {
7220 struct nfs_server *server;
7221 struct nfs41_free_stateid_args args;
9aeda35f 7222 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7223};
7224
7225static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7226{
7227 struct nfs_free_stateid_data *data = calldata;
7228 nfs41_setup_sequence(nfs4_get_session(data->server),
7229 &data->args.seq_args,
7230 &data->res.seq_res,
7231 task);
7232}
7233
7234static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7235{
7236 struct nfs_free_stateid_data *data = calldata;
7237
7238 nfs41_sequence_done(task, &data->res.seq_res);
7239
7240 switch (task->tk_status) {
7241 case -NFS4ERR_DELAY:
7242 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7243 rpc_restart_call_prepare(task);
7244 }
7245}
7246
7247static void nfs41_free_stateid_release(void *calldata)
7248{
7249 kfree(calldata);
7250}
7251
7252const struct rpc_call_ops nfs41_free_stateid_ops = {
7253 .rpc_call_prepare = nfs41_free_stateid_prepare,
7254 .rpc_call_done = nfs41_free_stateid_done,
7255 .rpc_release = nfs41_free_stateid_release,
7256};
7257
7258static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7259 nfs4_stateid *stateid,
ab7cb0df 7260 struct rpc_cred *cred,
7c1d5fae
TM		 7261 bool privileged)
7262{
9aeda35f
BS		 7263 struct rpc_message msg = {
7264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7265 .rpc_cred = cred,
9aeda35f 7266 };
7c1d5fae
TM		 7267 struct rpc_task_setup task_setup = {
7268 .rpc_client = server->client,
7269 .rpc_message = &msg,
7270 .callback_ops = &nfs41_free_stateid_ops,
7271 .flags = RPC_TASK_ASYNC,
7272 };
7273 struct nfs_free_stateid_data *data;
9aeda35f 7274
38527b15 7275 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7276 data = kmalloc(sizeof(*data), GFP_NOFS);
7277 if (!data)
7278 return ERR_PTR(-ENOMEM);
7279 data->server = server;
7280 nfs4_stateid_copy(&data->args.stateid, stateid);
7281
7282 task_setup.callback_data = data;
7283
7284 msg.rpc_argp = &data->args;
7285 msg.rpc_resp = &data->res;
7286 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7287 if (privileged)
7288 nfs4_set_sequence_privileged(&data->args.seq_args);
7289
7290 return rpc_run_task(&task_setup);
9aeda35f
BS		 7291}
7292
38527b15
CL		 7293/**
7294 * nfs41_free_stateid - perform a FREE_STATEID operation
7295 *
7296 * @server: server / transport on which to perform the operation
7297 * @stateid: state ID to release
ab7cb0df 7298 * @cred: credential
38527b15
CL		 7299 *
7300 * Returns NFS_OK if the server freed "stateid". Otherwise a
7301 * negative NFS4ERR value is returned.
7302 */
ab7cb0df
TM		 7303static int nfs41_free_stateid(struct nfs_server *server,
7304 nfs4_stateid *stateid,
7305 struct rpc_cred *cred)
9aeda35f 7306{
7c1d5fae
TM		 7307 struct rpc_task *task;
7308 int ret;
7309
ab7cb0df 7310 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7311 if (IS_ERR(task))
7312 return PTR_ERR(task);
7313 ret = rpc_wait_for_completion_task(task);
7314 if (!ret)
7315 ret = task->tk_status;
7316 rpc_put_task(task);
7317 return ret;
9aeda35f 7318}
36281caa 7319
c8b2d0bf
TM		 7320static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7321{
7322 struct rpc_task *task;
ab7cb0df 7323 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7324
ab7cb0df 7325 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7326 nfs4_free_lock_state(server, lsp);
7327 if (IS_ERR(task))
7328 return PTR_ERR(task);
7329 rpc_put_task(task);
7330 return 0;
7331}
7332
36281caa
TM		 7333static bool nfs41_match_stateid(const nfs4_stateid *s1,
7334 const nfs4_stateid *s2)
7335{
2d2f24ad 7336 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7337 return false;
7338
2d2f24ad 7339 if (s1->seqid == s2->seqid)
36281caa 7340 return true;
2d2f24ad 7341 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7342 return true;
7343
7344 return false;
7345}
7346
557134a3
AA		 7347#endif /* CONFIG_NFS_V4_1 */
7348
36281caa
TM		 7349static bool nfs4_match_stateid(const nfs4_stateid *s1,
7350 const nfs4_stateid *s2)
7351{
f597c537 7352 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7353}
7354
7355
17280175 7356static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7357 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7358 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7359 .recover_open = nfs4_open_reclaim,
7360 .recover_lock = nfs4_lock_reclaim,
591d71cb 7361 .establish_clid = nfs4_init_clientid,
90a16617 7362 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 7363 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7364};
7365
591d71cb 7366#if defined(CONFIG_NFS_V4_1)
17280175 7367static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7368 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7369 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7370 .recover_open = nfs4_open_reclaim,
7371 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7372 .establish_clid = nfs41_init_clientid,
b4b82607 7373 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 7374 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7375 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7376};
7377#endif /* CONFIG_NFS_V4_1 */
7378
17280175 7379static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7380 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7381 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7382 .recover_open = nfs4_open_expired,
7383 .recover_lock = nfs4_lock_expired,
7384 .establish_clid = nfs4_init_clientid,
90a16617 7385 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7386};
7387
7388#if defined(CONFIG_NFS_V4_1)
17280175 7389static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7390 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7391 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7392 .recover_open = nfs41_open_expired,
7393 .recover_lock = nfs41_lock_expired,
4d643d1d 7394 .establish_clid = nfs41_init_clientid,
b4b82607 7395 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7396};
591d71cb 7397#endif /* CONFIG_NFS_V4_1 */
1da177e4 7398
17280175 7399static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7400 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7401 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7402 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7403};
7404
7405#if defined(CONFIG_NFS_V4_1)
17280175 7406static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7407 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7408 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7409 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7410};
7411#endif
7412
97dc1359
TM		 7413static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7414 .minor_version = 0,
39c6daae
TM		 7415 .init_caps = NFS_CAP_READDIRPLUS
7416 | NFS_CAP_ATOMIC_OPEN
7417 | NFS_CAP_CHANGE_ATTR
7418 | NFS_CAP_POSIX_LOCK,
97dc1359 7419 .call_sync = _nfs4_call_sync,
36281caa 7420 .match_stateid = nfs4_match_stateid,
fca78d6d 7421 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7422 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7423 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7424 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7425 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7426};
7427
7428#if defined(CONFIG_NFS_V4_1)
7429static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7430 .minor_version = 1,
39c6daae
TM		 7431 .init_caps = NFS_CAP_READDIRPLUS
7432 | NFS_CAP_ATOMIC_OPEN
7433 | NFS_CAP_CHANGE_ATTR
3b66486c 7434 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7435 | NFS_CAP_STATEID_NFSV41
7436 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7437 .call_sync = nfs4_call_sync_sequence,
36281caa 7438 .match_stateid = nfs41_match_stateid,
fca78d6d 7439 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7440 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7441 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7442 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7443 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7444};
7445#endif
7446
42c2c424
SD		 7447#if defined(CONFIG_NFS_V4_2)
7448static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7449 .minor_version = 2,
7017310a
BS		 7450 .init_caps = NFS_CAP_READDIRPLUS
7451 | NFS_CAP_ATOMIC_OPEN
7452 | NFS_CAP_CHANGE_ATTR
7453 | NFS_CAP_POSIX_LOCK
7454 | NFS_CAP_STATEID_NFSV41
7455 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7456 .call_sync = nfs4_call_sync_sequence,
7457 .match_stateid = nfs41_match_stateid,
7458 .find_root_sec = nfs41_find_root_sec,
7017310a 7459 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7460 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7461 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7462 .state_renewal_ops = &nfs41_state_renewal_ops,
7463};
7464#endif
7465
97dc1359
TM		 7466const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7467 [0] = &nfs_v4_0_minor_ops,
7468#if defined(CONFIG_NFS_V4_1)
7469 [1] = &nfs_v4_1_minor_ops,
7470#endif
42c2c424
SD		 7471#if defined(CONFIG_NFS_V4_2)
7472 [2] = &nfs_v4_2_minor_ops,
7473#endif
97dc1359
TM		 7474};
7475
73a79706
BS		 7476const struct inode_operations nfs4_dir_inode_operations = {
7477 .create = nfs_create,
7478 .lookup = nfs_lookup,
7479 .atomic_open = nfs_atomic_open,
7480 .link = nfs_link,
7481 .unlink = nfs_unlink,
7482 .symlink = nfs_symlink,
7483 .mkdir = nfs_mkdir,
7484 .rmdir = nfs_rmdir,
7485 .mknod = nfs_mknod,
7486 .rename = nfs_rename,
7487 .permission = nfs_permission,
7488 .getattr = nfs_getattr,
7489 .setattr = nfs_setattr,
7490 .getxattr = generic_getxattr,
7491 .setxattr = generic_setxattr,
7492 .listxattr = generic_listxattr,
7493 .removexattr = generic_removexattr,
7494};
7495
92e1d5be 7496static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7497 .permission = nfs_permission,
7498 .getattr = nfs_getattr,
7499 .setattr = nfs_setattr,
64c2ce8b
AK		 7500 .getxattr = generic_getxattr,
7501 .setxattr = generic_setxattr,
7502 .listxattr = generic_listxattr,
7503 .removexattr = generic_removexattr,
6b3b5496
BF		 7504};
7505
509de811 7506const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7507 .version = 4, /* protocol version */
7508 .dentry_ops = &nfs4_dentry_operations,
7509 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7510 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7511 .file_ops = &nfs4_file_operations,
1da177e4 7512 .getroot = nfs4_proc_get_root,
281cad46 7513 .submount = nfs4_submount,
ff9099f2 7514 .try_mount = nfs4_try_mount,
1da177e4
LT		 7515 .getattr = nfs4_proc_getattr,
7516 .setattr = nfs4_proc_setattr,
7517 .lookup = nfs4_proc_lookup,
7518 .access = nfs4_proc_access,
7519 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7520 .create = nfs4_proc_create,
7521 .remove = nfs4_proc_remove,
7522 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7523 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7524 .unlink_done = nfs4_proc_unlink_done,
7525 .rename = nfs4_proc_rename,
d3d4152a 7526 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7527 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7528 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7529 .link = nfs4_proc_link,
7530 .symlink = nfs4_proc_symlink,
7531 .mkdir = nfs4_proc_mkdir,
7532 .rmdir = nfs4_proc_remove,
7533 .readdir = nfs4_proc_readdir,
7534 .mknod = nfs4_proc_mknod,
7535 .statfs = nfs4_proc_statfs,
7536 .fsinfo = nfs4_proc_fsinfo,
7537 .pathconf = nfs4_proc_pathconf,
e9326dca 7538 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7539 .decode_dirent = nfs4_decode_dirent,
7540 .read_setup = nfs4_proc_read_setup,
1abb5088 7541 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7542 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7543 .read_done = nfs4_read_done,
1da177e4 7544 .write_setup = nfs4_proc_write_setup,
57208fa7 7545 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7546 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7547 .write_done = nfs4_write_done,
1da177e4 7548 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7549 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7550 .commit_done = nfs4_commit_done,
1da177e4 7551 .lock = nfs4_proc_lock,
e50a1c2e 7552 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7553 .close_context = nfs4_close_context,
2b484297 7554 .open_context = nfs4_atomic_open,
011e2a7f 7555 .have_delegation = nfs4_have_delegation,
57ec14c5 7556 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7557 .alloc_client = nfs4_alloc_client,
45a52a02 7558 .init_client = nfs4_init_client,
cdb7eced 7559 .free_client = nfs4_free_client,
1179acc6
BS		 7560 .create_server = nfs4_create_server,
7561 .clone_server = nfs_clone_server,
1da177e4
LT		 7562};
7563
64c2ce8b
AK		 7564static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7565 .prefix = XATTR_NAME_NFSV4_ACL,
7566 .list = nfs4_xattr_list_nfs4_acl,
7567 .get = nfs4_xattr_get_nfs4_acl,
7568 .set = nfs4_xattr_set_nfs4_acl,
7569};
7570
7571const struct xattr_handler *nfs4_xattr_handlers[] = {
7572 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7573#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7574 &nfs4_xattr_nfs4_label_handler,
7575#endif
64c2ce8b
AK		 7576 NULL
7577};
7578
1da177e4
LT		 7579/*
7580 * Local variables:
7581 * c-basic-offset: 8
7582 * End:
7583 */
Linux 6.x block layer and io_uring tree(s)