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NFS: Add in v4.2 callback operation
[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
1cab0652
BS		 87static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 89#endif
aa9c2669
DQ		 90
91#ifdef CONFIG_NFS_V4_SECURITY_LABEL
92static inline struct nfs4_label *
93nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
94 struct iattr *sattr, struct nfs4_label *label)
95{
96 int err;
97
98 if (label == NULL)
99 return NULL;
100
101 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
102 return NULL;
103
104 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
105 return NULL;
106
107 err = security_dentry_init_security(dentry, sattr->ia_mode,
108 &dentry->d_name, (void **)&label->label, &label->len);
109 if (err == 0)
110 return label;
111
112 return NULL;
113}
114static inline void
115nfs4_label_release_security(struct nfs4_label *label)
116{
117 if (label)
118 security_release_secctx(label->label, label->len);
119}
120static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
121{
122 if (label)
123 return server->attr_bitmask;
124
125 return server->attr_bitmask_nl;
126}
127#else
128static inline struct nfs4_label *
129nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
130 struct iattr *sattr, struct nfs4_label *l)
131{ return NULL; }
132static inline void
133nfs4_label_release_security(struct nfs4_label *label)
134{ return; }
135static inline u32 *
136nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
137{ return server->attr_bitmask; }
138#endif
139
1da177e4 140/* Prevent leaks of NFSv4 errors into userland */
46f72f57 141static int nfs4_map_errors(int err)
1da177e4 142{
52567b03
TM		 143 if (err >= -1000)
144 return err;
145 switch (err) {
146 case -NFS4ERR_RESOURCE:
30005121
WAA		 147 case -NFS4ERR_LAYOUTTRYLATER:
148 case -NFS4ERR_RECALLCONFLICT:
52567b03 149 return -EREMOTEIO;
7ebb9315
BS		 150 case -NFS4ERR_WRONGSEC:
151 return -EPERM;
3ddeb7c5
TM		 152 case -NFS4ERR_BADOWNER:
153 case -NFS4ERR_BADNAME:
154 return -EINVAL;
fb13bfa7
TM		 155 case -NFS4ERR_SHARE_DENIED:
156 return -EACCES;
f25efd85
SD		 157 case -NFS4ERR_MINOR_VERS_MISMATCH:
158 return -EPROTONOSUPPORT;
6168f62c
WAA		 159 case -NFS4ERR_ACCESS:
160 return -EACCES;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 188 | FATTR4_WORD1_TIME_MODIFY,
189#ifdef CONFIG_NFS_V4_SECURITY_LABEL
190 FATTR4_WORD2_SECURITY_LABEL
191#endif
1da177e4
LT		 192};
193
1549210f
TM		 194static const u32 nfs4_pnfs_open_bitmap[3] = {
195 FATTR4_WORD0_TYPE
196 | FATTR4_WORD0_CHANGE
197 | FATTR4_WORD0_SIZE
198 | FATTR4_WORD0_FSID
199 | FATTR4_WORD0_FILEID,
200 FATTR4_WORD1_MODE
201 | FATTR4_WORD1_NUMLINKS
202 | FATTR4_WORD1_OWNER
203 | FATTR4_WORD1_OWNER_GROUP
204 | FATTR4_WORD1_RAWDEV
205 | FATTR4_WORD1_SPACE_USED
206 | FATTR4_WORD1_TIME_ACCESS
207 | FATTR4_WORD1_TIME_METADATA
208 | FATTR4_WORD1_TIME_MODIFY,
209 FATTR4_WORD2_MDSTHRESHOLD
210};
211
e23008ec
AA		 212static const u32 nfs4_open_noattr_bitmap[3] = {
213 FATTR4_WORD0_TYPE
214 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
216};
217
a09df2ca 218const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 219 FATTR4_WORD0_FILES_AVAIL
220 | FATTR4_WORD0_FILES_FREE
221 | FATTR4_WORD0_FILES_TOTAL,
222 FATTR4_WORD1_SPACE_AVAIL
223 | FATTR4_WORD1_SPACE_FREE
224 | FATTR4_WORD1_SPACE_TOTAL
225};
226
a09df2ca 227const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 228 FATTR4_WORD0_MAXLINK
229 | FATTR4_WORD0_MAXNAME,
230 0
231};
232
dae100c2 233const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 234 | FATTR4_WORD0_MAXREAD
235 | FATTR4_WORD0_MAXWRITE
236 | FATTR4_WORD0_LEASE_TIME,
55b6e774 237 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 238 | FATTR4_WORD1_FS_LAYOUT_TYPES,
239 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 240};
241
a09df2ca 242const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 243 FATTR4_WORD0_TYPE
244 | FATTR4_WORD0_CHANGE
245 | FATTR4_WORD0_SIZE
246 | FATTR4_WORD0_FSID
247 | FATTR4_WORD0_FILEID
248 | FATTR4_WORD0_FS_LOCATIONS,
249 FATTR4_WORD1_MODE
250 | FATTR4_WORD1_NUMLINKS
251 | FATTR4_WORD1_OWNER
252 | FATTR4_WORD1_OWNER_GROUP
253 | FATTR4_WORD1_RAWDEV
254 | FATTR4_WORD1_SPACE_USED
255 | FATTR4_WORD1_TIME_ACCESS
256 | FATTR4_WORD1_TIME_METADATA
257 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 258 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 259};
260
bc4785cd 261static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 262 struct nfs4_readdir_arg *readdir)
263{
0dbb4c67 264 __be32 *start, *p;
1da177e4 265
1da177e4 266 if (cookie > 2) {
b7ef1956 267 readdir->cookie = cookie;
1da177e4
LT		 268 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
269 return;
270 }
271
272 readdir->cookie = 0;
273 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
274 if (cookie == 2)
275 return;
276
277 /*
278 * NFSv4 servers do not return entries for '.' and '..'
279 * Therefore, we fake these entries here. We let '.'
280 * have cookie 0 and '..' have cookie 1. Note that
281 * when talking to the server, we always send cookie 0
282 * instead of 1 or 2.
283 */
2b86ce2d 284 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 285
286 if (cookie == 0) {
287 *p++ = xdr_one; /* next */
288 *p++ = xdr_zero; /* cookie, first word */
289 *p++ = xdr_one; /* cookie, second word */
290 *p++ = xdr_one; /* entry len */
291 memcpy(p, ".\0\0\0", 4); /* entry */
292 p++;
293 *p++ = xdr_one; /* bitmap length */
294 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
295 *p++ = htonl(8); /* attribute buffer length */
4e769b93 296 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 297 }
298
299 *p++ = xdr_one; /* next */
300 *p++ = xdr_zero; /* cookie, first word */
301 *p++ = xdr_two; /* cookie, second word */
302 *p++ = xdr_two; /* entry len */
303 memcpy(p, "..\0\0", 4); /* entry */
304 p++;
305 *p++ = xdr_one; /* bitmap length */
306 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
307 *p++ = htonl(8); /* attribute buffer length */
4e769b93 308 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 309
310 readdir->pgbase = (char *)p - (char *)start;
311 readdir->count -= readdir->pgbase;
2b86ce2d 312 kunmap_atomic(start);
1da177e4
LT		 313}
314
65de872e
TM		 315static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
316{
317 int res = 0;
318
319 might_sleep();
320
321 if (*timeout <= 0)
322 *timeout = NFS4_POLL_RETRY_MIN;
323 if (*timeout > NFS4_POLL_RETRY_MAX)
324 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 325 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 326 if (fatal_signal_pending(current))
327 res = -ERESTARTSYS;
328 *timeout <<= 1;
329 return res;
330}
331
332/* This is the error handling routine for processes that are allowed
333 * to sleep.
334 */
b064eca2 335static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 336{
337 struct nfs_client *clp = server->nfs_client;
9e33bed5 338 struct nfs4_state *state = exception->state;
3114ea7a 339 struct inode *inode = exception->inode;
65de872e
TM		 340 int ret = errorcode;
341
342 exception->retry = 0;
343 switch(errorcode) {
344 case 0:
345 return 0;
3114ea7a 346 case -NFS4ERR_OPENMODE:
011e2a7f 347 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 348 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 349 exception->retry = 1;
350 return 0;
351 }
352 if (state == NULL)
353 break;
5d422301
TM		 354 ret = nfs4_schedule_stateid_recovery(server, state);
355 if (ret < 0)
356 break;
3114ea7a 357 goto wait_on_recovery;
a1d0b5ee 358 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 359 case -NFS4ERR_ADMIN_REVOKED:
360 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 361 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
362 nfs_remove_bad_delegation(inode);
363 exception->retry = 1;
364 break;
365 }
9e33bed5
TM		 366 if (state == NULL)
367 break;
5d422301
TM		 368 ret = nfs4_schedule_stateid_recovery(server, state);
369 if (ret < 0)
370 break;
0400a6b0 371 goto wait_on_recovery;
0ced63d1 372 case -NFS4ERR_EXPIRED:
5d422301
TM		 373 if (state != NULL) {
374 ret = nfs4_schedule_stateid_recovery(server, state);
375 if (ret < 0)
376 break;
377 }
65de872e 378 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 379 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 380 nfs4_schedule_lease_recovery(clp);
381 goto wait_on_recovery;
03391693 382#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 383 case -NFS4ERR_BADSESSION:
384 case -NFS4ERR_BADSLOT:
385 case -NFS4ERR_BAD_HIGH_SLOT:
386 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
387 case -NFS4ERR_DEADSESSION:
388 case -NFS4ERR_SEQ_FALSE_RETRY:
389 case -NFS4ERR_SEQ_MISORDERED:
390 dprintk("%s ERROR: %d Reset session\n", __func__,
391 errorcode);
9f594791 392 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 393 goto wait_on_recovery;
03391693 394#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 395 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 396 if (exception->timeout > HZ) {
397 /* We have retried a decent amount, time to
398 * fail
399 */
400 ret = -EBUSY;
401 break;
402 }
65de872e
TM		 403 case -NFS4ERR_GRACE:
404 case -NFS4ERR_DELAY:
405 ret = nfs4_delay(server->client, &exception->timeout);
406 if (ret != 0)
407 break;
a8a4ae3a 408 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 409 case -NFS4ERR_OLD_STATEID:
410 exception->retry = 1;
b064eca2
TM		 411 break;
412 case -NFS4ERR_BADOWNER:
413 /* The following works around a Linux server bug! */
414 case -NFS4ERR_BADNAME:
415 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
416 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
417 exception->retry = 1;
418 printk(KERN_WARNING "NFS: v4 server %s "
419 "does not accept raw "
420 "uid/gids. "
421 "Reenabling the idmapper.\n",
422 server->nfs_client->cl_hostname);
423 }
65de872e
TM		 424 }
425 /* We failed to handle the error */
426 return nfs4_map_errors(ret);
0400a6b0 427wait_on_recovery:
a2c0b9e2
TM		 428 ret = nfs4_wait_clnt_recover(clp);
429 if (ret == 0)
430 exception->retry = 1;
431 return ret;
65de872e
TM		 432}
433
434
452e9352 435static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 436{
1da177e4
LT		 437 spin_lock(&clp->cl_lock);
438 if (time_before(clp->cl_last_renewal,timestamp))
439 clp->cl_last_renewal = timestamp;
440 spin_unlock(&clp->cl_lock);
441}
442
452e9352
TM		 443static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
444{
445 do_renew_lease(server->nfs_client, timestamp);
446}
447
cccef3b9
AA		 448#if defined(CONFIG_NFS_V4_1)
449
d185a334 450static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 451{
e3725ec0 452 struct nfs4_session *session;
13615871 453 struct nfs4_slot_table *tbl;
c10e4498 454 bool send_new_highest_used_slotid = false;
13615871 455
dfb4f309 456 if (!res->sr_slot) {
13615871
AA		 457 /* just wake up the next guy waiting since
458 * we may have not consumed a slot after all */
691daf3b 459 dprintk("%s: No slot\n", __func__);
35dc1d74 460 return;
13615871 461 }
e3725ec0
TM		 462 tbl = res->sr_slot->table;
463 session = tbl->session;
ea028ac9 464
35dc1d74 465 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 466 /* Be nice to the server: try to ensure that the last transmitted
467 * value for highest_user_slotid <= target_highest_slotid
468 */
469 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
470 send_new_highest_used_slotid = true;
471
b75ad4cd
TM		 472 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
473 send_new_highest_used_slotid = false;
474 goto out_unlock;
475 }
f4af6e2a 476 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 477
478 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
479 send_new_highest_used_slotid = false;
b75ad4cd 480out_unlock:
35dc1d74 481 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 482 res->sr_slot = NULL;
c10e4498
TM		 483 if (send_new_highest_used_slotid)
484 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 485}
486
14516c3a 487static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 488{
e3725ec0 489 struct nfs4_session *session;
933602e3 490 struct nfs4_slot *slot;
14516c3a 491 struct nfs_client *clp;
ac20d163 492 bool interrupted = false;
85563073 493 int ret = 1;
b0df806c 494
468f8613
BS		 495 /* don't increment the sequence number if the task wasn't sent */
496 if (!RPC_WAS_SENT(task))
b0df806c
AA		 497 goto out;
498
933602e3 499 slot = res->sr_slot;
e3725ec0 500 session = slot->table->session;
933602e3 501
ac20d163
TM		 502 if (slot->interrupted) {
503 slot->interrupted = 0;
504 interrupted = true;
505 }
506
691daf3b 507 /* Check the SEQUENCE operation status */
14516c3a
TM		 508 switch (res->sr_status) {
509 case 0:
b0df806c 510 /* Update the slot's sequence and clientid lease timer */
933602e3 511 ++slot->seq_nr;
e3725ec0 512 clp = session->clp;
8e63b6a8 513 do_renew_lease(clp, res->sr_timestamp);
0629e370 514 /* Check sequence flags */
b4410c2f
TM		 515 if (res->sr_status_flags != 0)
516 nfs4_schedule_lease_recovery(clp);
464ee9f9 517 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 518 break;
ac20d163
TM		 519 case 1:
520 /*
521 * sr_status remains 1 if an RPC level error occurred.
522 * The server may or may not have processed the sequence
523 * operation..
524 * Mark the slot as having hosted an interrupted RPC call.
525 */
526 slot->interrupted = 1;
527 goto out;
14516c3a
TM		 528 case -NFS4ERR_DELAY:
529 /* The server detected a resend of the RPC call and
530 * returned NFS4ERR_DELAY as per Section 2.10.6.2
531 * of RFC5661.
532 */
df2fabff 533 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 534 __func__,
df2fabff 535 slot->slot_nr,
933602e3 536 slot->seq_nr);
14516c3a 537 goto out_retry;
85563073
TM		 538 case -NFS4ERR_BADSLOT:
539 /*
540 * The slot id we used was probably retired. Try again
541 * using a different slot id.
542 */
e8794440
TM		 543 goto retry_nowait;
544 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 545 /*
546 * Was the last operation on this sequence interrupted?
547 * If so, retry after bumping the sequence number.
548 */
549 if (interrupted) {
550 ++slot->seq_nr;
551 goto retry_nowait;
552 }
e8794440
TM		 553 /*
554 * Could this slot have been previously retired?
555 * If so, then the server may be expecting seq_nr = 1!
556 */
8e63b6a8
TM		 557 if (slot->seq_nr != 1) {
558 slot->seq_nr = 1;
559 goto retry_nowait;
560 }
561 break;
e8794440
TM		 562 case -NFS4ERR_SEQ_FALSE_RETRY:
563 ++slot->seq_nr;
564 goto retry_nowait;
14516c3a
TM		 565 default:
566 /* Just update the slot sequence no. */
933602e3 567 ++slot->seq_nr;
b0df806c
AA		 568 }
569out:
570 /* The session may be reset by one of the error handlers. */
571 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 572 nfs41_sequence_free_slot(res);
85563073 573 return ret;
e8794440
TM		 574retry_nowait:
575 if (rpc_restart_call_prepare(task)) {
576 task->tk_status = 0;
577 ret = 0;
578 }
579 goto out;
14516c3a 580out_retry:
d05dd4e9 581 if (!rpc_restart_call(task))
14516c3a
TM		 582 goto out;
583 rpc_delay(task, NFS4_POLL_RETRY_MAX);
584 return 0;
b0df806c
AA		 585}
586
14516c3a
TM		 587static int nfs4_sequence_done(struct rpc_task *task,
588 struct nfs4_sequence_res *res)
df896455 589{
e3725ec0 590 if (res->sr_slot == NULL)
14516c3a
TM		 591 return 1;
592 return nfs41_sequence_done(task, res);
df896455
TM		 593}
594
9d12b216
TM		 595static void nfs41_init_sequence(struct nfs4_sequence_args *args,
596 struct nfs4_sequence_res *res, int cache_reply)
597{
2b2fa717 598 args->sa_slot = NULL;
9d12b216 599 args->sa_cache_this = 0;
8fe72bac 600 args->sa_privileged = 0;
9d12b216
TM		 601 if (cache_reply)
602 args->sa_cache_this = 1;
9d12b216
TM		 603 res->sr_slot = NULL;
604}
605
8fe72bac
TM		 606static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
607{
608 args->sa_privileged = 1;
609}
610
dc70d7b3 611int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 612 struct nfs4_sequence_args *args,
613 struct nfs4_sequence_res *res,
ce5039c1
AA		 614 struct rpc_task *task)
615{
fbcd4abc
AA		 616 struct nfs4_slot *slot;
617 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 618
619 dprintk("--> %s\n", __func__);
ce5039c1 620 /* slot already allocated? */
dfb4f309 621 if (res->sr_slot != NULL)
d9afbd1b 622 goto out_success;
ce5039c1 623
fbcd4abc
AA		 624 tbl = &session->fc_slot_table;
625
69d206b5
TM		 626 task->tk_timeout = 0;
627
fbcd4abc 628 spin_lock(&tbl->slot_tbl_lock);
a2118c33 629 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 630 !args->sa_privileged) {
0b1c8fc4 631 /* The state manager will wait until the slot table is empty */
0b1c8fc4 632 dprintk("%s session is draining\n", __func__);
7b939a3f 633 goto out_sleep;
689cf5c1
AB		 634 }
635
2dc03b7f 636 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 637 if (IS_ERR(slot)) {
638 /* If out of memory, try again in 1/4 second */
639 if (slot == ERR_PTR(-ENOMEM))
640 task->tk_timeout = HZ >> 2;
fbcd4abc 641 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 642 goto out_sleep;
fbcd4abc
AA		 643 }
644 spin_unlock(&tbl->slot_tbl_lock);
645
2b2fa717 646 args->sa_slot = slot;
fbcd4abc 647
2dc03b7f
TM		 648 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
649 slot->slot_nr, slot->seq_nr);
fbcd4abc 650
dfb4f309 651 res->sr_slot = slot;
8e63b6a8 652 res->sr_timestamp = jiffies;
2a6e26cd 653 res->sr_status_flags = 0;
fbcd4abc
AA		 654 /*
655 * sr_status is only set in decode_sequence, and so will remain
656 * set to 1 if an rpc level failure occurs.
657 */
658 res->sr_status = 1;
d9afbd1b
TM		 659out_success:
660 rpc_call_start(task);
ce5039c1 661 return 0;
7b939a3f 662out_sleep:
8fe72bac
TM		 663 /* Privileged tasks are queued with top priority */
664 if (args->sa_privileged)
1e1093c7
TM		 665 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
666 NULL, RPC_PRIORITY_PRIVILEGED);
667 else
668 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 669 spin_unlock(&tbl->slot_tbl_lock);
670 return -EAGAIN;
ce5039c1 671}
dc70d7b3 672EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 673
035168ab 674int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 675 struct nfs4_sequence_args *args,
676 struct nfs4_sequence_res *res,
ce5039c1
AA		 677 struct rpc_task *task)
678{
035168ab 679 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 680 int ret = 0;
681
d9afbd1b
TM		 682 if (session == NULL) {
683 rpc_call_start(task);
035168ab 684 goto out;
d9afbd1b 685 }
035168ab 686
df2fabff 687 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 688 __func__, session->clp, session, res->sr_slot ?
df2fabff 689 res->sr_slot->slot_nr : -1);
ce5039c1 690
9d12b216 691 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 692out:
693 dprintk("<-- %s status=%d\n", __func__, ret);
694 return ret;
695}
696
697struct nfs41_call_sync_data {
035168ab 698 const struct nfs_server *seq_server;
ce5039c1
AA		 699 struct nfs4_sequence_args *seq_args;
700 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 701};
702
703static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
704{
705 struct nfs41_call_sync_data *data = calldata;
6ba7db34 706 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 707
035168ab
TM		 708 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
709
d9afbd1b 710 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 711}
712
69ab40c4
AA		 713static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
714{
715 struct nfs41_call_sync_data *data = calldata;
716
14516c3a 717 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 718}
719
17280175 720static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 721 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 722 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 723};
724
7c513058
BS		 725static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
726 struct nfs_server *server,
ce5039c1
AA		 727 struct rpc_message *msg,
728 struct nfs4_sequence_args *args,
8fe72bac 729 struct nfs4_sequence_res *res)
ce5039c1
AA		 730{
731 int ret;
732 struct rpc_task *task;
733 struct nfs41_call_sync_data data = {
035168ab 734 .seq_server = server,
ce5039c1
AA		 735 .seq_args = args,
736 .seq_res = res,
ce5039c1
AA		 737 };
738 struct rpc_task_setup task_setup = {
7c513058 739 .rpc_client = clnt,
ce5039c1
AA		 740 .rpc_message = msg,
741 .callback_ops = &nfs41_call_sync_ops,
742 .callback_data = &data
743 };
744
ce5039c1
AA		 745 task = rpc_run_task(&task_setup);
746 if (IS_ERR(task))
747 ret = PTR_ERR(task);
748 else {
749 ret = task->tk_status;
750 rpc_put_task(task);
751 }
752 return ret;
753}
754
df896455 755#else
8fe72bac 756static
9d12b216
TM		 757void nfs41_init_sequence(struct nfs4_sequence_args *args,
758 struct nfs4_sequence_res *res, int cache_reply)
759{
760}
761
8fe72bac
TM		 762static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
763{
764}
765
766
14516c3a
TM		 767static int nfs4_sequence_done(struct rpc_task *task,
768 struct nfs4_sequence_res *res)
df896455 769{
14516c3a 770 return 1;
df896455 771}
cccef3b9
AA		 772#endif /* CONFIG_NFS_V4_1 */
773
fd0c0953 774static
7c513058
BS		 775int _nfs4_call_sync(struct rpc_clnt *clnt,
776 struct nfs_server *server,
cccef3b9
AA		 777 struct rpc_message *msg,
778 struct nfs4_sequence_args *args,
fd0c0953 779 struct nfs4_sequence_res *res)
cccef3b9 780{
7c513058 781 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 782}
783
fd0c0953 784static
7c513058
BS		 785int nfs4_call_sync(struct rpc_clnt *clnt,
786 struct nfs_server *server,
e73b83f2
BS		 787 struct rpc_message *msg,
788 struct nfs4_sequence_args *args,
789 struct nfs4_sequence_res *res,
790 int cache_reply)
791{
fd0c0953 792 nfs41_init_sequence(args, res, cache_reply);
7c513058 793 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 794 args, res);
e73b83f2 795}
cccef3b9 796
38478b24 797static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 798{
38478b24 799 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 800
38478b24 801 spin_lock(&dir->i_lock);
359d7d1c 802 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 803 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 804 nfs_force_lookup_revalidate(dir);
a9a4a87a 805 dir->i_version = cinfo->after;
de242c0b 806 nfs_fscache_invalidate(dir);
38478b24 807 spin_unlock(&dir->i_lock);
1da177e4
LT		 808}
809
e56e0b78 810struct nfs4_opendata {
c6d00e63 811 struct kref kref;
e56e0b78
TM		 812 struct nfs_openargs o_arg;
813 struct nfs_openres o_res;
cdd4e68b
TM		 814 struct nfs_open_confirmargs c_arg;
815 struct nfs_open_confirmres c_res;
6926afd1
TM		 816 struct nfs4_string owner_name;
817 struct nfs4_string group_name;
e56e0b78 818 struct nfs_fattr f_attr;
1775fd3e 819 struct nfs4_label *f_label;
e56e0b78 820 struct dentry *dir;
82a2c1b7 821 struct dentry *dentry;
e56e0b78 822 struct nfs4_state_owner *owner;
aac00a8d 823 struct nfs4_state *state;
e56e0b78 824 struct iattr attrs;
26e976a8 825 unsigned long timestamp;
3e309914 826 unsigned int rpc_done : 1;
bdeca1b7 827 unsigned int is_recover : 1;
24ac23ab
TM		 828 int rpc_status;
829 int cancelled;
e56e0b78
TM		 830};
831
49f9a0fa
TM		 832static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
833 int err, struct nfs4_exception *exception)
834{
835 if (err != -EINVAL)
836 return false;
837 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
838 return false;
839 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
840 exception->retry = 1;
841 return true;
842}
843
844static enum open_claim_type4
845nfs4_map_atomic_open_claim(struct nfs_server *server,
846 enum open_claim_type4 claim)
847{
848 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
849 return claim;
850 switch (claim) {
851 default:
852 return claim;
853 case NFS4_OPEN_CLAIM_FH:
854 return NFS4_OPEN_CLAIM_NULL;
855 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
856 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
857 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
858 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
859 }
860}
2ced46c2
TM		 861
862static void nfs4_init_opendata_res(struct nfs4_opendata *p)
863{
864 p->o_res.f_attr = &p->f_attr;
1775fd3e 865 p->o_res.f_label = p->f_label;
c1d51931
TM		 866 p->o_res.seqid = p->o_arg.seqid;
867 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 868 p->o_res.server = p->o_arg.server;
5f657530 869 p->o_res.access_request = p->o_arg.access;
2ced46c2 870 nfs_fattr_init(&p->f_attr);
6926afd1 871 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 872}
873
82a2c1b7 874static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 875 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 876 const struct iattr *attrs,
1775fd3e 877 struct nfs4_label *label,
4a1c0893 878 enum open_claim_type4 claim,
8535b2be 879 gfp_t gfp_mask)
e56e0b78 880{
82a2c1b7 881 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 882 struct inode *dir = parent->d_inode;
883 struct nfs_server *server = NFS_SERVER(dir);
884 struct nfs4_opendata *p;
885
8535b2be 886 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 887 if (p == NULL)
888 goto err;
14c43f76
DQ		 889
890 p->f_label = nfs4_label_alloc(server, gfp_mask);
891 if (IS_ERR(p->f_label))
892 goto err_free_p;
893
8535b2be 894 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 895 if (p->o_arg.seqid == NULL)
14c43f76 896 goto err_free_label;
82a2c1b7
AV		 897 nfs_sb_active(dentry->d_sb);
898 p->dentry = dget(dentry);
e56e0b78
TM		 899 p->dir = parent;
900 p->owner = sp;
901 atomic_inc(&sp->so_count);
dc0b027d
TM		 902 p->o_arg.open_flags = flags;
903 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 904 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
905 * will return permission denied for all bits until close */
906 if (!(flags & O_EXCL)) {
907 /* ask server to check for all possible rights as results
908 * are cached */
909 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
910 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 911 }
7539bbab 912 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 913 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
914 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 915 p->o_arg.name = &dentry->d_name;
e56e0b78 916 p->o_arg.server = server;
aa9c2669 917 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 918 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 919 p->o_arg.label = label;
49f9a0fa
TM		 920 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
921 switch (p->o_arg.claim) {
4a1c0893
TM		 922 case NFS4_OPEN_CLAIM_NULL:
923 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
924 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
925 p->o_arg.fh = NFS_FH(dir);
926 break;
927 case NFS4_OPEN_CLAIM_PREVIOUS:
928 case NFS4_OPEN_CLAIM_FH:
929 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
930 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
931 p->o_arg.fh = NFS_FH(dentry->d_inode);
932 }
536e43d1 933 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 934 __be32 verf[2];
d77d76ff 935
e56e0b78
TM		 936 p->o_arg.u.attrs = &p->attrs;
937 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 938
939 verf[0] = jiffies;
940 verf[1] = current->pid;
941 memcpy(p->o_arg.u.verifier.data, verf,
942 sizeof(p->o_arg.u.verifier.data));
e56e0b78 943 }
cdd4e68b
TM		 944 p->c_arg.fh = &p->o_res.fh;
945 p->c_arg.stateid = &p->o_res.stateid;
946 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 947 nfs4_init_opendata_res(p);
c6d00e63 948 kref_init(&p->kref);
e56e0b78 949 return p;
14c43f76
DQ		 950
951err_free_label:
952 nfs4_label_free(p->f_label);
953err_free_p:
e56e0b78
TM		 954 kfree(p);
955err:
956 dput(parent);
957 return NULL;
958}
959
c6d00e63 960static void nfs4_opendata_free(struct kref *kref)
e56e0b78 961{
c6d00e63
TM		 962 struct nfs4_opendata *p = container_of(kref,
963 struct nfs4_opendata, kref);
82a2c1b7 964 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 965
966 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 967 if (p->state != NULL)
968 nfs4_put_open_state(p->state);
c6d00e63 969 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 970
971 nfs4_label_free(p->f_label);
972
c6d00e63 973 dput(p->dir);
82a2c1b7
AV		 974 dput(p->dentry);
975 nfs_sb_deactive(sb);
6926afd1 976 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 977 kfree(p);
978}
979
980static void nfs4_opendata_put(struct nfs4_opendata *p)
981{
982 if (p != NULL)
983 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 984}
985
06f814a3
TM		 986static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
987{
06f814a3
TM		 988 int ret;
989
06f814a3 990 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 991 return ret;
992}
993
dc0b027d 994static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 995{
996 int ret = 0;
dc0b027d 997
536e43d1 998 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 999 goto out;
1000 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1001 case FMODE_READ:
88069f77
TM		 1002 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1003 && state->n_rdonly != 0;
6ee41268
TM		 1004 break;
1005 case FMODE_WRITE:
88069f77
TM		 1006 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1007 && state->n_wronly != 0;
6ee41268
TM		 1008 break;
1009 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1010 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1011 && state->n_rdwr != 0;
6ee41268 1012 }
dc0b027d 1013out:
6ee41268
TM		 1014 return ret;
1015}
1016
dc0b027d 1017static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1018{
652f89f6
TM		 1019 if (delegation == NULL)
1020 return 0;
dc0b027d 1021 if ((delegation->type & fmode) != fmode)
aac00a8d 1022 return 0;
15c831bf 1023 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1024 return 0;
d25be546
TM		 1025 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1026 return 0;
b7391f44 1027 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1028 return 1;
1029}
1030
dc0b027d 1031static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1032{
dc0b027d 1033 switch (fmode) {
e7616923
TM		 1034 case FMODE_WRITE:
1035 state->n_wronly++;
1036 break;
1037 case FMODE_READ:
1038 state->n_rdonly++;
1039 break;
1040 case FMODE_READ|FMODE_WRITE:
1041 state->n_rdwr++;
1042 }
dc0b027d 1043 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1044}
1045
dc0b027d 1046static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1047{
1048 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1049 nfs4_stateid_copy(&state->stateid, stateid);
1050 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1051 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1052 switch (fmode) {
003707c7
TM		 1053 case FMODE_READ:
1054 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1055 break;
1056 case FMODE_WRITE:
1057 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1058 break;
1059 case FMODE_READ|FMODE_WRITE:
1060 set_bit(NFS_O_RDWR_STATE, &state->flags);
1061 }
e7616923
TM		 1062}
1063
dc0b027d 1064static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1065{
8bda4e4c 1066 write_seqlock(&state->seqlock);
dc0b027d 1067 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1068 write_sequnlock(&state->seqlock);
003707c7
TM		 1069}
1070
dc0b027d 1071static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1072{
8bda4e4c
TM		 1073 /*
1074 * Protect the call to nfs4_state_set_mode_locked and
1075 * serialise the stateid update
1076 */
1077 write_seqlock(&state->seqlock);
003707c7 1078 if (deleg_stateid != NULL) {
f597c537 1079 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1080 set_bit(NFS_DELEGATED_STATE, &state->flags);
1081 }
1082 if (open_stateid != NULL)
dc0b027d 1083 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1084 write_sequnlock(&state->seqlock);
1085 spin_lock(&state->owner->so_lock);
dc0b027d 1086 update_open_stateflags(state, fmode);
ec073428 1087 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1088}
1089
dc0b027d 1090static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1091{
1092 struct nfs_inode *nfsi = NFS_I(state->inode);
1093 struct nfs_delegation *deleg_cur;
1094 int ret = 0;
1095
dc0b027d 1096 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1097
1098 rcu_read_lock();
1099 deleg_cur = rcu_dereference(nfsi->delegation);
1100 if (deleg_cur == NULL)
1101 goto no_delegation;
1102
1103 spin_lock(&deleg_cur->lock);
1104 if (nfsi->delegation != deleg_cur ||
d25be546 1105 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1106 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1107 goto no_delegation_unlock;
1108
1109 if (delegation == NULL)
1110 delegation = &deleg_cur->stateid;
f597c537 1111 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1112 goto no_delegation_unlock;
1113
b7391f44 1114 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1115 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1116 ret = 1;
1117no_delegation_unlock:
1118 spin_unlock(&deleg_cur->lock);
1119no_delegation:
1120 rcu_read_unlock();
1121
1122 if (!ret && open_stateid != NULL) {
dc0b027d 1123 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1124 ret = 1;
1125 }
1126
1127 return ret;
1128}
1129
1130
dc0b027d 1131static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1132{
1133 struct nfs_delegation *delegation;
1134
1135 rcu_read_lock();
1136 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1137 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1138 rcu_read_unlock();
1139 return;
1140 }
1141 rcu_read_unlock();
57ec14c5 1142 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1143}
1144
6ee41268 1145static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1146{
1147 struct nfs4_state *state = opendata->state;
1148 struct nfs_inode *nfsi = NFS_I(state->inode);
1149 struct nfs_delegation *delegation;
536e43d1 1150 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1151 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1152 nfs4_stateid stateid;
1153 int ret = -EAGAIN;
1154
aac00a8d 1155 for (;;) {
dc0b027d 1156 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1157 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1158 if (can_open_cached(state, fmode, open_mode)) {
1159 update_open_stateflags(state, fmode);
6ee41268 1160 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1161 goto out_return_state;
1162 }
1163 spin_unlock(&state->owner->so_lock);
1164 }
34310430
TM		 1165 rcu_read_lock();
1166 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1167 if (!can_open_delegated(delegation, fmode)) {
34310430 1168 rcu_read_unlock();
aac00a8d 1169 break;
34310430 1170 }
aac00a8d 1171 /* Save the delegation */
f597c537 1172 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1173 rcu_read_unlock();
fa332941 1174 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1175 if (!opendata->is_recover) {
1176 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1177 if (ret != 0)
1178 goto out;
1179 }
aac00a8d 1180 ret = -EAGAIN;
34310430
TM		 1181
1182 /* Try to update the stateid using the delegation */
dc0b027d 1183 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1184 goto out_return_state;
aac00a8d 1185 }
aac00a8d
TM		 1186out:
1187 return ERR_PTR(ret);
1188out_return_state:
1189 atomic_inc(&state->count);
1190 return state;
1191}
1192
e23008ec
AA		 1193static void
1194nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1195{
1196 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1197 struct nfs_delegation *delegation;
1198 int delegation_flags = 0;
1199
1200 rcu_read_lock();
1201 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1202 if (delegation)
1203 delegation_flags = delegation->flags;
1204 rcu_read_unlock();
1205 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1206 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1207 "returning a delegation for "
1208 "OPEN(CLAIM_DELEGATE_CUR)\n",
1209 clp->cl_hostname);
1210 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1211 nfs_inode_set_delegation(state->inode,
1212 data->owner->so_cred,
1213 &data->o_res);
1214 else
1215 nfs_inode_reclaim_delegation(state->inode,
1216 data->owner->so_cred,
1217 &data->o_res);
1218}
1219
1220/*
1221 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1222 * and update the nfs4_state.
1223 */
1224static struct nfs4_state *
1225_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1226{
1227 struct inode *inode = data->state->inode;
1228 struct nfs4_state *state = data->state;
1229 int ret;
1230
1231 if (!data->rpc_done) {
1232 ret = data->rpc_status;
1233 goto err;
1234 }
1235
1236 ret = -ESTALE;
1237 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1238 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1239 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1240 goto err;
1241
1242 ret = -ENOMEM;
1243 state = nfs4_get_open_state(inode, data->owner);
1244 if (state == NULL)
1245 goto err;
1246
1247 ret = nfs_refresh_inode(inode, &data->f_attr);
1248 if (ret)
1249 goto err;
1250
aa9c2669
DQ		 1251 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1252
e23008ec
AA		 1253 if (data->o_res.delegation_type != 0)
1254 nfs4_opendata_check_deleg(data, state);
1255 update_open_stateid(state, &data->o_res.stateid, NULL,
1256 data->o_arg.fmode);
1257
1258 return state;
1259err:
1260 return ERR_PTR(ret);
1261
1262}
1263
1264static struct nfs4_state *
1265_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1266{
1267 struct inode *inode;
1268 struct nfs4_state *state = NULL;
1b370bc2 1269 int ret;
24ac23ab 1270
aac00a8d 1271 if (!data->rpc_done) {
6ee41268 1272 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1273 goto out;
1274 }
1275
1b370bc2 1276 ret = -EAGAIN;
24ac23ab 1277 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1278 goto err;
1775fd3e 1279 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1280 ret = PTR_ERR(inode);
03f28e3a 1281 if (IS_ERR(inode))
1b370bc2
TM		 1282 goto err;
1283 ret = -ENOMEM;
24ac23ab
TM		 1284 state = nfs4_get_open_state(inode, data->owner);
1285 if (state == NULL)
1b370bc2 1286 goto err_put_inode;
e23008ec
AA		 1287 if (data->o_res.delegation_type != 0)
1288 nfs4_opendata_check_deleg(data, state);
34310430 1289 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1290 data->o_arg.fmode);
24ac23ab 1291 iput(inode);
aac00a8d 1292out:
7aa262b5 1293 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1294 return state;
1b370bc2
TM		 1295err_put_inode:
1296 iput(inode);
1297err:
1298 return ERR_PTR(ret);
24ac23ab
TM		 1299}
1300
e23008ec
AA		 1301static struct nfs4_state *
1302nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1303{
1304 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1305 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1306 return _nfs4_opendata_to_nfs4_state(data);
1307}
1308
864472e9
TM		 1309static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1310{
1311 struct nfs_inode *nfsi = NFS_I(state->inode);
1312 struct nfs_open_context *ctx;
1313
1314 spin_lock(&state->inode->i_lock);
1315 list_for_each_entry(ctx, &nfsi->open_files, list) {
1316 if (ctx->state != state)
1317 continue;
1318 get_nfs_open_context(ctx);
1319 spin_unlock(&state->inode->i_lock);
1320 return ctx;
1321 }
1322 spin_unlock(&state->inode->i_lock);
1323 return ERR_PTR(-ENOENT);
1324}
1325
4a1c0893
TM		 1326static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1327 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1328{
1329 struct nfs4_opendata *opendata;
1330
4a1c0893 1331 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1332 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1333 if (opendata == NULL)
1334 return ERR_PTR(-ENOMEM);
1335 opendata->state = state;
1336 atomic_inc(&state->count);
1337 return opendata;
1338}
1339
dc0b027d 1340static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1341{
2ced46c2 1342 struct nfs4_state *newstate;
864472e9
TM		 1343 int ret;
1344
dc0b027d
TM		 1345 opendata->o_arg.open_flags = 0;
1346 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1347 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1348 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1349 nfs4_init_opendata_res(opendata);
b257957e 1350 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1351 if (ret != 0)
1352 return ret;
2ced46c2 1353 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1354 if (IS_ERR(newstate))
1355 return PTR_ERR(newstate);
643168c2 1356 nfs4_close_state(newstate, fmode);
2ced46c2 1357 *res = newstate;
864472e9
TM		 1358 return 0;
1359}
1360
1361static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1362{
864472e9 1363 struct nfs4_state *newstate;
864472e9
TM		 1364 int ret;
1365
1366 /* memory barrier prior to reading state->n_* */
2ced46c2 1367 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1368 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1369 smp_rmb();
1370 if (state->n_rdwr != 0) {
b0ed9dbc 1371 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1372 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1373 if (ret != 0)
1374 return ret;
2ced46c2
TM		 1375 if (newstate != state)
1376 return -ESTALE;
864472e9
TM		 1377 }
1378 if (state->n_wronly != 0) {
b0ed9dbc 1379 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1380 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1381 if (ret != 0)
1382 return ret;
2ced46c2
TM		 1383 if (newstate != state)
1384 return -ESTALE;
864472e9
TM		 1385 }
1386 if (state->n_rdonly != 0) {
b0ed9dbc 1387 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1388 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1389 if (ret != 0)
1390 return ret;
2ced46c2
TM		 1391 if (newstate != state)
1392 return -ESTALE;
864472e9 1393 }
1ac7e2fd
TM		 1394 /*
1395 * We may have performed cached opens for all three recoveries.
1396 * Check if we need to update the current stateid.
1397 */
1398 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1399 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1400 write_seqlock(&state->seqlock);
1ac7e2fd 1401 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1402 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1403 write_sequnlock(&state->seqlock);
1ac7e2fd 1404 }
864472e9
TM		 1405 return 0;
1406}
1407
1da177e4
LT		 1408/*
1409 * OPEN_RECLAIM:
1410 * reclaim state on the server after a reboot.
1da177e4 1411 */
539cd03a 1412static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1413{
1ac7e2fd 1414 struct nfs_delegation *delegation;
864472e9 1415 struct nfs4_opendata *opendata;
dc0b027d 1416 fmode_t delegation_type = 0;
1da177e4
LT		 1417 int status;
1418
4a1c0893
TM		 1419 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1420 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1421 if (IS_ERR(opendata))
1422 return PTR_ERR(opendata);
1ac7e2fd
TM		 1423 rcu_read_lock();
1424 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1425 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1426 delegation_type = delegation->type;
1ac7e2fd 1427 rcu_read_unlock();
864472e9
TM		 1428 opendata->o_arg.u.delegation_type = delegation_type;
1429 status = nfs4_open_recover(opendata, state);
c6d00e63 1430 nfs4_opendata_put(opendata);
1da177e4
LT		 1431 return status;
1432}
1433
539cd03a 1434static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1435{
1436 struct nfs_server *server = NFS_SERVER(state->inode);
1437 struct nfs4_exception exception = { };
1438 int err;
1439 do {
539cd03a 1440 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1441 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1442 continue;
168667c4 1443 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1444 break;
1445 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1446 } while (exception.retry);
1447 return err;
1448}
1449
864472e9
TM		 1450static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1451{
1452 struct nfs_open_context *ctx;
1453 int ret;
1454
1455 ctx = nfs4_state_find_open_context(state);
1456 if (IS_ERR(ctx))
91876b13 1457 return -EAGAIN;
539cd03a 1458 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1459 put_nfs_open_context(ctx);
1460 return ret;
1461}
1462
db4f2e63 1463static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1464{
be76b5b6
TM		 1465 switch (err) {
1466 default:
1467 printk(KERN_ERR "NFS: %s: unhandled error "
1468 "%d.\n", __func__, err);
1469 case 0:
1470 case -ENOENT:
1471 case -ESTALE:
1472 break;
1473 case -NFS4ERR_BADSESSION:
1474 case -NFS4ERR_BADSLOT:
1475 case -NFS4ERR_BAD_HIGH_SLOT:
1476 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1477 case -NFS4ERR_DEADSESSION:
1478 set_bit(NFS_DELEGATED_STATE, &state->flags);
1479 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1480 return -EAGAIN;
1481 case -NFS4ERR_STALE_CLIENTID:
1482 case -NFS4ERR_STALE_STATEID:
1483 set_bit(NFS_DELEGATED_STATE, &state->flags);
1484 case -NFS4ERR_EXPIRED:
1485 /* Don't recall a delegation if it was lost */
1486 nfs4_schedule_lease_recovery(server->nfs_client);
1487 return -EAGAIN;
1488 case -NFS4ERR_DELEG_REVOKED:
1489 case -NFS4ERR_ADMIN_REVOKED:
1490 case -NFS4ERR_BAD_STATEID:
db4f2e63 1491 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1492 nfs_inode_find_state_and_recover(state->inode,
1493 stateid);
1494 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1495 return 0;
1496 case -NFS4ERR_DELAY:
1497 case -NFS4ERR_GRACE:
1498 set_bit(NFS_DELEGATED_STATE, &state->flags);
1499 ssleep(1);
1500 return -EAGAIN;
db4f2e63
TM		 1501 case -ENOMEM:
1502 case -NFS4ERR_DENIED:
1503 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1504 return 0;
be76b5b6 1505 }
1da177e4
LT		 1506 return err;
1507}
1508
db4f2e63
TM		 1509int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1510{
1511 struct nfs_server *server = NFS_SERVER(state->inode);
1512 struct nfs4_opendata *opendata;
1513 int err;
1514
1515 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1516 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1517 if (IS_ERR(opendata))
1518 return PTR_ERR(opendata);
1519 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1520 err = nfs4_open_recover(opendata, state);
1521 nfs4_opendata_put(opendata);
1522 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1523}
1524
cdd4e68b
TM		 1525static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1526{
1527 struct nfs4_opendata *data = calldata;
1528
1529 data->rpc_status = task->tk_status;
26e976a8 1530 if (data->rpc_status == 0) {
f597c537 1531 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1532 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1533 renew_lease(data->o_res.server, data->timestamp);
3e309914 1534 data->rpc_done = 1;
26e976a8 1535 }
cdd4e68b
TM		 1536}
1537
1538static void nfs4_open_confirm_release(void *calldata)
1539{
1540 struct nfs4_opendata *data = calldata;
1541 struct nfs4_state *state = NULL;
1542
1543 /* If this request hasn't been cancelled, do nothing */
1544 if (data->cancelled == 0)
1545 goto out_free;
1546 /* In case of error, no cleanup! */
3e309914 1547 if (!data->rpc_done)
cdd4e68b 1548 goto out_free;
cdd4e68b 1549 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1550 if (!IS_ERR(state))
643168c2 1551 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1552out_free:
c6d00e63 1553 nfs4_opendata_put(data);
cdd4e68b
TM		 1554}
1555
1556static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1557 .rpc_call_done = nfs4_open_confirm_done,
1558 .rpc_release = nfs4_open_confirm_release,
1559};
1560
1561/*
1562 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1563 */
1564static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1565{
1566 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1567 struct rpc_task *task;
5138fde0
TM		 1568 struct rpc_message msg = {
1569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1570 .rpc_argp = &data->c_arg,
1571 .rpc_resp = &data->c_res,
1572 .rpc_cred = data->owner->so_cred,
1573 };
c970aa85
TM		 1574 struct rpc_task_setup task_setup_data = {
1575 .rpc_client = server->client,
5138fde0 1576 .rpc_message = &msg,
c970aa85
TM		 1577 .callback_ops = &nfs4_open_confirm_ops,
1578 .callback_data = data,
101070ca 1579 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1580 .flags = RPC_TASK_ASYNC,
1581 };
1da177e4
LT		 1582 int status;
1583
c6d00e63 1584 kref_get(&data->kref);
3e309914
TM		 1585 data->rpc_done = 0;
1586 data->rpc_status = 0;
5138fde0 1587 data->timestamp = jiffies;
c970aa85 1588 task = rpc_run_task(&task_setup_data);
7a1218a2 1589 if (IS_ERR(task))
cdd4e68b 1590 return PTR_ERR(task);
cdd4e68b
TM		 1591 status = nfs4_wait_for_completion_rpc_task(task);
1592 if (status != 0) {
1593 data->cancelled = 1;
1594 smp_wmb();
1595 } else
1596 status = data->rpc_status;
e6b3c4db 1597 rpc_put_task(task);
1da177e4
LT		 1598 return status;
1599}
1600
24ac23ab 1601static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1602{
24ac23ab
TM		 1603 struct nfs4_opendata *data = calldata;
1604 struct nfs4_state_owner *sp = data->owner;
549b19cc 1605 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1606
24ac23ab 1607 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1608 goto out_wait;
aac00a8d
TM		 1609 /*
1610 * Check if we still need to send an OPEN call, or if we can use
1611 * a delegation instead.
1612 */
1613 if (data->state != NULL) {
1614 struct nfs_delegation *delegation;
1615
dc0b027d 1616 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1617 goto out_no_action;
aac00a8d
TM		 1618 rcu_read_lock();
1619 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1620 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1621 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1622 can_open_delegated(delegation, data->o_arg.fmode))
1623 goto unlock_no_action;
aac00a8d
TM		 1624 rcu_read_unlock();
1625 }
95b72eb0 1626 /* Update client id. */
549b19cc 1627 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1628 switch (data->o_arg.claim) {
1629 case NFS4_OPEN_CLAIM_PREVIOUS:
1630 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1631 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1632 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1633 case NFS4_OPEN_CLAIM_FH:
1634 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1635 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1636 }
26e976a8 1637 data->timestamp = jiffies;
035168ab 1638 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1639 &data->o_arg.seq_args,
2240a9e2
TM		 1640 &data->o_res.seq_res,
1641 task) != 0)
1642 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1643
1644 /* Set the create mode (note dependency on the session type) */
1645 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1646 if (data->o_arg.open_flags & O_EXCL) {
1647 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1648 if (nfs4_has_persistent_session(clp))
1649 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1650 else if (clp->cl_mvops->minor_version > 0)
1651 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1652 }
6ee41268 1653 return;
652f89f6
TM		 1654unlock_no_action:
1655 rcu_read_unlock();
6ee41268
TM		 1656out_no_action:
1657 task->tk_action = NULL;
c8da19b9 1658out_wait:
b75ad4cd 1659 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1660}
1661
24ac23ab
TM		 1662static void nfs4_open_done(struct rpc_task *task, void *calldata)
1663{
1664 struct nfs4_opendata *data = calldata;
1da177e4 1665
24ac23ab 1666 data->rpc_status = task->tk_status;
d898528c 1667
14516c3a
TM		 1668 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1669 return;
d898528c 1670
24ac23ab 1671 if (task->tk_status == 0) {
807d66d8
TM		 1672 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1673 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1674 case S_IFREG:
1675 break;
1676 case S_IFLNK:
24ac23ab 1677 data->rpc_status = -ELOOP;
6f926b5b
TM		 1678 break;
1679 case S_IFDIR:
24ac23ab 1680 data->rpc_status = -EISDIR;
6f926b5b
TM		 1681 break;
1682 default:
24ac23ab 1683 data->rpc_status = -ENOTDIR;
807d66d8 1684 }
6f926b5b 1685 }
26e976a8 1686 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1687 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1688 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1689 }
3e309914 1690 data->rpc_done = 1;
24ac23ab 1691}
6f926b5b 1692
24ac23ab
TM		 1693static void nfs4_open_release(void *calldata)
1694{
1695 struct nfs4_opendata *data = calldata;
1696 struct nfs4_state *state = NULL;
1697
1698 /* If this request hasn't been cancelled, do nothing */
1699 if (data->cancelled == 0)
1700 goto out_free;
1701 /* In case of error, no cleanup! */
3e309914 1702 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1703 goto out_free;
1704 /* In case we need an open_confirm, no cleanup! */
1705 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1706 goto out_free;
24ac23ab 1707 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1708 if (!IS_ERR(state))
643168c2 1709 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1710out_free:
c6d00e63 1711 nfs4_opendata_put(data);
24ac23ab
TM		 1712}
1713
1714static const struct rpc_call_ops nfs4_open_ops = {
1715 .rpc_call_prepare = nfs4_open_prepare,
1716 .rpc_call_done = nfs4_open_done,
1717 .rpc_release = nfs4_open_release,
1718};
1719
b257957e 1720static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1721{
1722 struct inode *dir = data->dir->d_inode;
1723 struct nfs_server *server = NFS_SERVER(dir);
1724 struct nfs_openargs *o_arg = &data->o_arg;
1725 struct nfs_openres *o_res = &data->o_res;
1726 struct rpc_task *task;
5138fde0
TM		 1727 struct rpc_message msg = {
1728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1729 .rpc_argp = o_arg,
1730 .rpc_resp = o_res,
1731 .rpc_cred = data->owner->so_cred,
1732 };
c970aa85
TM		 1733 struct rpc_task_setup task_setup_data = {
1734 .rpc_client = server->client,
5138fde0 1735 .rpc_message = &msg,
c970aa85
TM		 1736 .callback_ops = &nfs4_open_ops,
1737 .callback_data = data,
101070ca 1738 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1739 .flags = RPC_TASK_ASYNC,
1740 };
24ac23ab
TM		 1741 int status;
1742
9d12b216 1743 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1744 kref_get(&data->kref);
3e309914
TM		 1745 data->rpc_done = 0;
1746 data->rpc_status = 0;
2ced46c2 1747 data->cancelled = 0;
bdeca1b7
TM		 1748 data->is_recover = 0;
1749 if (isrecover) {
8fe72bac 1750 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1751 data->is_recover = 1;
1752 }
c970aa85 1753 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1754 if (IS_ERR(task))
1755 return PTR_ERR(task);
1756 status = nfs4_wait_for_completion_rpc_task(task);
1757 if (status != 0) {
1758 data->cancelled = 1;
1759 smp_wmb();
1760 } else
1761 status = data->rpc_status;
1762 rpc_put_task(task);
1763
1764 return status;
1765}
1766
1767static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1768{
1769 struct inode *dir = data->dir->d_inode;
1770 struct nfs_openres *o_res = &data->o_res;
1771 int status;
1772
1773 status = nfs4_run_open_task(data, 1);
1774 if (status != 0 || !data->rpc_done)
1775 return status;
1776
6926afd1
TM		 1777 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1778
b257957e
AB		 1779 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1780 status = _nfs4_proc_open_confirm(data);
1781 if (status != 0)
1782 return status;
1783 }
1784
1785 return status;
1786}
1787
6168f62c
WAA		 1788static int nfs4_opendata_access(struct rpc_cred *cred,
1789 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1790 struct nfs4_state *state, fmode_t fmode,
1791 int openflags)
6168f62c
WAA		 1792{
1793 struct nfs_access_entry cache;
1794 u32 mask;
1795
1796 /* access call failed or for some reason the server doesn't
1797 * support any access modes -- defer access call until later */
1798 if (opendata->o_res.access_supported == 0)
1799 return 0;
1800
1801 mask = 0;
bbd3a8ee 1802 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1803 * write mode bits, but POSIX allows the creating process to write.
1804 * use openflags to check for exec, because fmode won't
1805 * always have FMODE_EXEC set when file open for exec. */
1806 if (openflags & __FMODE_EXEC) {
1807 /* ONLY check for exec rights */
1808 mask = MAY_EXEC;
1809 } else if (fmode & FMODE_READ)
1810 mask = MAY_READ;
6168f62c
WAA		 1811
1812 cache.cred = cred;
1813 cache.jiffies = jiffies;
1814 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1815 nfs_access_add_cache(state->inode, &cache);
1816
bbd3a8ee 1817 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1818 return 0;
1819
1820 /* even though OPEN succeeded, access is denied. Close the file */
1821 nfs4_close_state(state, fmode);
998f40b5 1822 return -EACCES;
6168f62c
WAA		 1823}
1824
b257957e
AB		 1825/*
1826 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1827 */
1828static int _nfs4_proc_open(struct nfs4_opendata *data)
1829{
1830 struct inode *dir = data->dir->d_inode;
1831 struct nfs_server *server = NFS_SERVER(dir);
1832 struct nfs_openargs *o_arg = &data->o_arg;
1833 struct nfs_openres *o_res = &data->o_res;
1834 int status;
1835
1836 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1837 if (!data->rpc_done)
1838 return status;
1839 if (status != 0) {
1840 if (status == -NFS4ERR_BADNAME &&
1841 !(o_arg->open_flags & O_CREAT))
1842 return -ENOENT;
24ac23ab 1843 return status;
08ef7bd3 1844 }
24ac23ab 1845
6926afd1
TM		 1846 nfs_fattr_map_and_free_names(server, &data->f_attr);
1847
90ff0c54 1848 if (o_arg->open_flags & O_CREAT)
56ae19f3 1849 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1850 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1851 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1852 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1853 status = _nfs4_proc_open_confirm(data);
1da177e4 1854 if (status != 0)
24ac23ab 1855 return status;
1da177e4
LT		 1856 }
1857 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1858 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1859 return 0;
1da177e4
LT		 1860}
1861
d83217c1
AA		 1862static int nfs4_recover_expired_lease(struct nfs_server *server)
1863{
1864 return nfs4_client_recover_expired_lease(server->nfs_client);
1865}
1866
1da177e4
LT		 1867/*
1868 * OPEN_EXPIRED:
1869 * reclaim state on the server after a network partition.
1870 * Assumes caller holds the appropriate lock
1871 */
539cd03a 1872static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1873{
e56e0b78 1874 struct nfs4_opendata *opendata;
864472e9 1875 int ret;
1da177e4 1876
4a1c0893 1877 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1878 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1879 if (IS_ERR(opendata))
1880 return PTR_ERR(opendata);
864472e9 1881 ret = nfs4_open_recover(opendata, state);
35d05778 1882 if (ret == -ESTALE)
3d4ff43d 1883 d_drop(ctx->dentry);
c6d00e63 1884 nfs4_opendata_put(opendata);
864472e9 1885 return ret;
1da177e4
LT		 1886}
1887
a9ed2e25 1888static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1889{
539cd03a 1890 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1891 struct nfs4_exception exception = { };
1892 int err;
1893
1894 do {
539cd03a 1895 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1896 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1897 continue;
a9ed2e25
TM		 1898 switch (err) {
1899 default:
1900 goto out;
1901 case -NFS4ERR_GRACE:
1902 case -NFS4ERR_DELAY:
1903 nfs4_handle_exception(server, err, &exception);
1904 err = 0;
1905 }
202b50dc 1906 } while (exception.retry);
a9ed2e25 1907out:
202b50dc
TM		 1908 return err;
1909}
1910
1da177e4
LT		 1911static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1912{
1da177e4 1913 struct nfs_open_context *ctx;
864472e9 1914 int ret;
1da177e4 1915
864472e9
TM		 1916 ctx = nfs4_state_find_open_context(state);
1917 if (IS_ERR(ctx))
91876b13 1918 return -EAGAIN;
539cd03a 1919 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1920 put_nfs_open_context(ctx);
1921 return ret;
1da177e4
LT		 1922}
1923
f062eb6c 1924#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1925static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1926{
f062eb6c 1927 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1928 nfs4_stateid *stateid = &state->stateid;
1929 int status;
1930
1931 /* If a state reset has been done, test_stateid is unneeded */
1932 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1933 return;
1934
1935 status = nfs41_test_stateid(server, stateid);
1936 if (status != NFS_OK) {
1937 /* Free the stateid unless the server explicitly
1938 * informs us the stateid is unrecognized. */
1939 if (status != -NFS4ERR_BAD_STATEID)
1940 nfs41_free_stateid(server, stateid);
6938867e 1941 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1942
6938867e
BS		 1943 write_seqlock(&state->seqlock);
1944 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1945 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1946 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1947 }
1948}
1949
1950/**
1951 * nfs41_check_open_stateid - possibly free an open stateid
1952 *
1953 * @state: NFSv4 state for an inode
1954 *
1955 * Returns NFS_OK if recovery for this stateid is now finished.
1956 * Otherwise a negative NFS4ERR value is returned.
1957 */
1958static int nfs41_check_open_stateid(struct nfs4_state *state)
1959{
1960 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1961 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1962 int status;
1963
1964 /* If a state reset has been done, test_stateid is unneeded */
1965 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1966 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1967 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1968 return -NFS4ERR_BAD_STATEID;
1969
1970 status = nfs41_test_stateid(server, stateid);
1971 if (status != NFS_OK) {
1972 /* Free the stateid unless the server explicitly
1973 * informs us the stateid is unrecognized. */
1974 if (status != -NFS4ERR_BAD_STATEID)
1975 nfs41_free_stateid(server, stateid);
1976
1977 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1978 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1979 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1980 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1981 }
1982 return status;
1983}
1984
1985static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1986{
eb64cf96 1987 int status;
b01dd1d8 1988
3e60ffdd
CL		 1989 nfs41_clear_delegation_stateid(state);
1990 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1991 if (status != NFS_OK)
1992 status = nfs4_open_expired(sp, state);
1993 return status;
f062eb6c
BS		 1994}
1995#endif
1996
aa53ed54
JL		 1997/*
1998 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1999 * fields corresponding to attributes that were used to store the verifier.
2000 * Make sure we clobber those fields in the later setattr call
2001 */
2002static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2003{
2004 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2005 !(sattr->ia_valid & ATTR_ATIME_SET))
2006 sattr->ia_valid |= ATTR_ATIME;
2007
2008 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2009 !(sattr->ia_valid & ATTR_MTIME_SET))
2010 sattr->ia_valid |= ATTR_MTIME;
2011}
2012
c21443c2
TM		 2013static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2014 fmode_t fmode,
2015 int flags,
2016 struct nfs4_state **res)
2017{
2018 struct nfs4_state_owner *sp = opendata->owner;
2019 struct nfs_server *server = sp->so_server;
2020 struct nfs4_state *state;
2021 unsigned int seq;
2022 int ret;
2023
2024 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2025
2026 ret = _nfs4_proc_open(opendata);
2027 if (ret != 0)
2028 goto out;
2029
2030 state = nfs4_opendata_to_nfs4_state(opendata);
2031 ret = PTR_ERR(state);
2032 if (IS_ERR(state))
2033 goto out;
2034 if (server->caps & NFS_CAP_POSIX_LOCK)
2035 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2036
2037 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2038 if (ret != 0)
2039 goto out;
2040
91876b13 2041 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 2042 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 2043 *res = state;
2044out:
2045 return ret;
2046}
2047
1da177e4 2048/*
24ac23ab 2049 * Returns a referenced nfs4_state
1da177e4 2050 */
82be417a
AA		 2051static int _nfs4_do_open(struct inode *dir,
2052 struct dentry *dentry,
2053 fmode_t fmode,
2054 int flags,
2055 struct iattr *sattr,
1775fd3e 2056 struct nfs4_label *label,
82be417a
AA		 2057 struct rpc_cred *cred,
2058 struct nfs4_state **res,
2059 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2060{
2061 struct nfs4_state_owner *sp;
2062 struct nfs4_state *state = NULL;
2063 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2064 struct nfs4_opendata *opendata;
49f9a0fa 2065 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2066 struct nfs4_label *olabel = NULL;
aac00a8d 2067 int status;
1da177e4
LT		 2068
2069 /* Protect against reboot recovery conflicts */
1da177e4 2070 status = -ENOMEM;
d1e284d5
TM		 2071 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2072 if (sp == NULL) {
1da177e4
LT		 2073 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2074 goto out_err;
2075 }
58d9714a
TM		 2076 status = nfs4_recover_expired_lease(server);
2077 if (status != 0)
b4454fe1 2078 goto err_put_state_owner;
82a2c1b7
AV		 2079 if (dentry->d_inode != NULL)
2080 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2081 status = -ENOMEM;
49f9a0fa
TM		 2082 if (dentry->d_inode)
2083 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2084 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2085 label, claim, GFP_KERNEL);
e56e0b78 2086 if (opendata == NULL)
95d35cb4 2087 goto err_put_state_owner;
1da177e4 2088
14c43f76
DQ		 2089 if (label) {
2090 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2091 if (IS_ERR(olabel)) {
2092 status = PTR_ERR(olabel);
2093 goto err_opendata_put;
2094 }
2095 }
2096
82be417a
AA		 2097 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2098 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2099 if (!opendata->f_attr.mdsthreshold)
14c43f76 2100 goto err_free_label;
1549210f 2101 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2102 }
82a2c1b7
AV		 2103 if (dentry->d_inode != NULL)
2104 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2105
c21443c2 2106 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c 2107 if (status != 0)
14c43f76 2108 goto err_free_label;
6168f62c 2109
549b19cc
TM		 2110 if ((opendata->o_arg.open_flags & O_EXCL) &&
2111 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2112 nfs4_exclusive_attrset(opendata, sattr);
2113
2114 nfs_fattr_init(opendata->o_res.f_attr);
2115 status = nfs4_do_setattr(state->inode, cred,
2116 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2117 state, label, olabel);
2118 if (status == 0) {
0ab64e0e 2119 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2120 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2121 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2122 }
0ab64e0e 2123 }
82be417a
AA		 2124
2125 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2126 *ctx_th = opendata->f_attr.mdsthreshold;
2127 else
2128 kfree(opendata->f_attr.mdsthreshold);
2129 opendata->f_attr.mdsthreshold = NULL;
2130
14c43f76
DQ		 2131 nfs4_label_free(olabel);
2132
c6d00e63 2133 nfs4_opendata_put(opendata);
1da177e4 2134 nfs4_put_state_owner(sp);
1da177e4
LT		 2135 *res = state;
2136 return 0;
14c43f76
DQ		 2137err_free_label:
2138 nfs4_label_free(olabel);
c6d00e63 2139err_opendata_put:
82be417a 2140 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2141 nfs4_opendata_put(opendata);
e56e0b78
TM		 2142err_put_state_owner:
2143 nfs4_put_state_owner(sp);
1da177e4 2144out_err:
1da177e4
LT		 2145 *res = NULL;
2146 return status;
2147}
2148
2149
82be417a
AA		 2150static struct nfs4_state *nfs4_do_open(struct inode *dir,
2151 struct dentry *dentry,
2152 fmode_t fmode,
2153 int flags,
2154 struct iattr *sattr,
1775fd3e 2155 struct nfs4_label *label,
82be417a
AA		 2156 struct rpc_cred *cred,
2157 struct nfs4_threshold **ctx_th)
1da177e4 2158{
49f9a0fa 2159 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2160 struct nfs4_exception exception = { };
2161 struct nfs4_state *res;
2162 int status;
2163
6168f62c 2164 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2165 do {
1775fd3e 2166 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, label, cred,
82be417a 2167 &res, ctx_th);
1da177e4
LT		 2168 if (status == 0)
2169 break;
2170 /* NOTE: BAD_SEQID means the server and client disagree about the
2171 * book-keeping w.r.t. state-changing operations
2172 * (OPEN/CLOSE/LOCK/LOCKU...)
2173 * It is actually a sign of a bug on the client or on the server.
2174 *
2175 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2176 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2177 * have unhashed the old state_owner for us, and that we can
2178 * therefore safely retry using a new one. We should still warn
2179 * the user though...
2180 */
2181 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2182 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2183 " returned a bad sequence-id error!\n",
2184 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2185 exception.retry = 1;
2186 continue;
2187 }
550f5747
TM		 2188 /*
2189 * BAD_STATEID on OPEN means that the server cancelled our
2190 * state before it received the OPEN_CONFIRM.
2191 * Recover by retrying the request as per the discussion
2192 * on Page 181 of RFC3530.
2193 */
2194 if (status == -NFS4ERR_BAD_STATEID) {
2195 exception.retry = 1;
2196 continue;
2197 }
aac00a8d
TM		 2198 if (status == -EAGAIN) {
2199 /* We must have found a delegation */
2200 exception.retry = 1;
2201 continue;
2202 }
49f9a0fa
TM		 2203 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2204 continue;
2205 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2206 status, &exception));
2207 } while (exception.retry);
2208 return res;
2209}
2210
659bfcd6
TM		 2211static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2212 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2213 struct nfs4_state *state, struct nfs4_label *ilabel,
2214 struct nfs4_label *olabel)
1da177e4 2215{
3e4f6290 2216 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2217 struct nfs_setattrargs arg = {
3e4f6290 2218 .fh = NFS_FH(inode),
1da177e4
LT		 2219 .iap = sattr,
2220 .server = server,
2221 .bitmask = server->attr_bitmask,
1775fd3e 2222 .label = ilabel,
1da177e4
LT		 2223 };
2224 struct nfs_setattrres res = {
2225 .fattr = fattr,
1775fd3e 2226 .label = olabel,
1da177e4
LT		 2227 .server = server,
2228 };
2229 struct rpc_message msg = {
659bfcd6
TM		 2230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2231 .rpc_argp = &arg,
2232 .rpc_resp = &res,
2233 .rpc_cred = cred,
1da177e4 2234 };
26e976a8 2235 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2236 fmode_t fmode;
2237 bool truncate;
65e4308d 2238 int status;
1da177e4 2239
aa9c2669
DQ		 2240 arg.bitmask = nfs4_bitmask(server, ilabel);
2241 if (ilabel)
2242 arg.bitmask = nfs4_bitmask(server, olabel);
2243
0e574af1 2244 nfs_fattr_init(fattr);
1da177e4 2245
ee3ae84e
TM		 2246 /* Servers should only apply open mode checks for file size changes */
2247 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2248 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2249
2250 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2251 /* Use that stateid */
2252 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2253 struct nfs_lockowner lockowner = {
2254 .l_owner = current->files,
2255 .l_pid = current->tgid,
2256 };
4fc8796d 2257 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2258 &lockowner);
08e9eac4 2259 } else
f597c537 2260 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2261
7c513058 2262 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2263 if (status == 0 && state != NULL)
2264 renew_lease(server, timestamp);
65e4308d 2265 return status;
1da177e4
LT		 2266}
2267
659bfcd6
TM		 2268static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2269 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2270 struct nfs4_state *state, struct nfs4_label *ilabel,
2271 struct nfs4_label *olabel)
1da177e4 2272{
3e4f6290 2273 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2274 struct nfs4_exception exception = {
2275 .state = state,
3114ea7a 2276 .inode = inode,
a1d0b5ee 2277 };
1da177e4
LT		 2278 int err;
2279 do {
1775fd3e 2280 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2281 switch (err) {
2282 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2283 if (!(sattr->ia_valid & ATTR_SIZE)) {
2284 pr_warn_once("NFSv4: server %s is incorrectly "
2285 "applying open mode checks to "
2286 "a SETATTR that is not "
2287 "changing file size.\n",
2288 server->nfs_client->cl_hostname);
2289 }
451146be
TM		 2290 if (state && !(state->state & FMODE_WRITE)) {
2291 err = -EBADF;
2292 if (sattr->ia_valid & ATTR_OPEN)
2293 err = -EACCES;
2294 goto out;
2295 }
2296 }
2297 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2298 } while (exception.retry);
451146be 2299out:
1da177e4
LT		 2300 return err;
2301}
2302
2303struct nfs4_closedata {
2304 struct inode *inode;
2305 struct nfs4_state *state;
2306 struct nfs_closeargs arg;
2307 struct nfs_closeres res;
516a6af6 2308 struct nfs_fattr fattr;
26e976a8 2309 unsigned long timestamp;
f7e8917a
FI		 2310 bool roc;
2311 u32 roc_barrier;
1da177e4
LT		 2312};
2313
963d8fe5 2314static void nfs4_free_closedata(void *data)
9512135d 2315{
963d8fe5
TM		 2316 struct nfs4_closedata *calldata = data;
2317 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2318 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2319
f7e8917a
FI		 2320 if (calldata->roc)
2321 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2322 nfs4_put_open_state(calldata->state);
2323 nfs_free_seqid(calldata->arg.seqid);
9512135d 2324 nfs4_put_state_owner(sp);
322b2b90 2325 nfs_sb_deactive(sb);
9512135d
TM		 2326 kfree(calldata);
2327}
2328
88069f77
TM		 2329static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2330 fmode_t fmode)
2331{
2332 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2333 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2334 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2335 case FMODE_WRITE:
88069f77 2336 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2337 break;
2338 case FMODE_READ:
88069f77 2339 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2340 break;
2341 case 0:
2342 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2343 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2344 clear_bit(NFS_OPEN_STATE, &state->flags);
2345 }
88069f77
TM		 2346 spin_unlock(&state->owner->so_lock);
2347}
2348
963d8fe5 2349static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2350{
963d8fe5 2351 struct nfs4_closedata *calldata = data;
1da177e4 2352 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2353 struct nfs_server *server = NFS_SERVER(calldata->inode);
2354
a3ca5651 2355 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2356 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2357 return;
1da177e4
LT		 2358 /* hmm. we are done with the inode, and in the process of freeing
2359 * the state_owner. we keep this around to process errors
2360 */
1da177e4
LT		 2361 switch (task->tk_status) {
2362 case 0:
f7e8917a
FI		 2363 if (calldata->roc)
2364 pnfs_roc_set_barrier(state->inode,
2365 calldata->roc_barrier);
45328c35 2366 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2367 renew_lease(server, calldata->timestamp);
88069f77
TM		 2368 nfs4_close_clear_stateid_flags(state,
2369 calldata->arg.fmode);
1da177e4
LT		 2370 break;
2371 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2372 case -NFS4ERR_OLD_STATEID:
2373 case -NFS4ERR_BAD_STATEID:
1da177e4 2374 case -NFS4ERR_EXPIRED:
dc0b027d 2375 if (calldata->arg.fmode == 0)
9e33bed5 2376 break;
1da177e4 2377 default:
72211dbe
TM		 2378 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2379 rpc_restart_call_prepare(task);
1da177e4 2380 }
72211dbe 2381 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2382 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2383 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2384}
2385
4ce70ada 2386static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2387{
4ce70ada 2388 struct nfs4_closedata *calldata = data;
9512135d 2389 struct nfs4_state *state = calldata->state;
7fdab069 2390 struct inode *inode = calldata->inode;
88069f77 2391 int call_close = 0;
9512135d 2392
a3ca5651 2393 dprintk("%s: begin!\n", __func__);
963d8fe5 2394 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2395 goto out_wait;
003707c7 2396
88069f77
TM		 2397 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2398 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2399 spin_lock(&state->owner->so_lock);
003707c7 2400 /* Calculate the change in open mode */
e7616923 2401 if (state->n_rdwr == 0) {
003707c7 2402 if (state->n_rdonly == 0) {
88069f77
TM		 2403 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2404 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2405 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2406 }
2407 if (state->n_wronly == 0) {
88069f77
TM		 2408 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2409 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2410 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2411 }
e7616923 2412 }
5d422301
TM		 2413 if (!nfs4_valid_open_stateid(state))
2414 call_close = 0;
4cecb76f 2415 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2416
2417 if (!call_close) {
963d8fe5 2418 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2419 goto out_no_action;
9512135d 2420 }
88069f77 2421
f7e8917a 2422 if (calldata->arg.fmode == 0) {
88069f77 2423 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2424 if (calldata->roc &&
b9536ad5
AA		 2425 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2426 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2427 goto out_wait;
b9536ad5 2428 }
f7e8917a 2429 }
88069f77 2430
516a6af6 2431 nfs_fattr_init(calldata->res.fattr);
26e976a8 2432 calldata->timestamp = jiffies;
7fdab069 2433 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2434 &calldata->arg.seq_args,
2435 &calldata->res.seq_res,
2240a9e2
TM		 2436 task) != 0)
2437 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2438 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2439 return;
2440out_no_action:
2441 task->tk_action = NULL;
2442out_wait:
2443 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2444}
2445
963d8fe5 2446static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2447 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2448 .rpc_call_done = nfs4_close_done,
2449 .rpc_release = nfs4_free_closedata,
2450};
2451
1da177e4
LT		 2452/*
2453 * It is possible for data to be read/written from a mem-mapped file
2454 * after the sys_close call (which hits the vfs layer as a flush).
2455 * This means that we can't safely call nfsv4 close on a file until
2456 * the inode is cleared. This in turn means that we are not good
2457 * NFSv4 citizens - we do not indicate to the server to update the file's
2458 * share state even when we are done with one of the three share
2459 * stateid's in the inode.
2460 *
2461 * NOTE: Caller must be holding the sp->so_owner semaphore!
2462 */
1f7977c1 2463int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2464{
4a35bd41 2465 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2466 struct nfs4_closedata *calldata;
b39e625b
TM		 2467 struct nfs4_state_owner *sp = state->owner;
2468 struct rpc_task *task;
5138fde0
TM		 2469 struct rpc_message msg = {
2470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2471 .rpc_cred = state->owner->so_cred,
2472 };
c970aa85
TM		 2473 struct rpc_task_setup task_setup_data = {
2474 .rpc_client = server->client,
5138fde0 2475 .rpc_message = &msg,
c970aa85 2476 .callback_ops = &nfs4_close_ops,
101070ca 2477 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2478 .flags = RPC_TASK_ASYNC,
2479 };
9512135d 2480 int status = -ENOMEM;
1da177e4 2481
8535b2be 2482 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2483 if (calldata == NULL)
9512135d 2484 goto out;
9d12b216 2485 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2486 calldata->inode = state->inode;
1da177e4 2487 calldata->state = state;
4a35bd41 2488 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2489 calldata->arg.stateid = &state->open_stateid;
1da177e4 2490 /* Serialization for the sequence id */
8535b2be 2491 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2492 if (calldata->arg.seqid == NULL)
2493 goto out_free_calldata;
dc0b027d 2494 calldata->arg.fmode = 0;
a65318bf 2495 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2496 calldata->res.fattr = &calldata->fattr;
c1d51931 2497 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2498 calldata->res.server = server;
1f7977c1 2499 calldata->roc = pnfs_roc(state->inode);
643168c2 2500 nfs_sb_active(calldata->inode->i_sb);
9512135d 2501
1174dd1f
TM		 2502 msg.rpc_argp = &calldata->arg;
2503 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2504 task_setup_data.callback_data = calldata;
2505 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2506 if (IS_ERR(task))
2507 return PTR_ERR(task);
a49c3c77
TM		 2508 status = 0;
2509 if (wait)
2510 status = rpc_wait_for_completion_task(task);
b39e625b 2511 rpc_put_task(task);
a49c3c77 2512 return status;
9512135d
TM		 2513out_free_calldata:
2514 kfree(calldata);
2515out:
b39e625b
TM		 2516 nfs4_put_open_state(state);
2517 nfs4_put_state_owner(sp);
9512135d 2518 return status;
1da177e4
LT		 2519}
2520
2b484297 2521static struct inode *
cd9a1c0e 2522nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2523{
1da177e4 2524 struct nfs4_state *state;
aa9c2669
DQ		 2525 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2526
2527 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2528
565277f6 2529 /* Protect against concurrent sillydeletes */
1775fd3e 2530 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, label,
82be417a 2531 ctx->cred, &ctx->mdsthreshold);
aa9c2669
DQ		 2532
2533 nfs4_label_release_security(label);
2534
f46e0bd3
TM		 2535 if (IS_ERR(state))
2536 return ERR_CAST(state);
cd9a1c0e 2537 ctx->state = state;
f46e0bd3 2538 return igrab(state->inode);
1da177e4
LT		 2539}
2540
1185a552 2541static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2542{
2543 if (ctx->state == NULL)
2544 return;
2545 if (is_sync)
643168c2 2546 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2547 else
643168c2 2548 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2549}
1da177e4
LT		 2550
2551static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2552{
43652ad5
BH		 2553 struct nfs4_server_caps_arg args = {
2554 .fhandle = fhandle,
2555 };
1da177e4
LT		 2556 struct nfs4_server_caps_res res = {};
2557 struct rpc_message msg = {
2558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2559 .rpc_argp = &args,
1da177e4
LT		 2560 .rpc_resp = &res,
2561 };
2562 int status;
2563
7c513058 2564 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2565 if (status == 0) {
2566 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2567 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2568 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2569 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2570 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2571 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2572 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2573 server->caps |= NFS_CAP_ACLS;
2574 if (res.has_links != 0)
2575 server->caps |= NFS_CAP_HARDLINKS;
2576 if (res.has_symlinks != 0)
2577 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2578 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2579 server->caps |= NFS_CAP_FILEID;
2580 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2581 server->caps |= NFS_CAP_MODE;
2582 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2583 server->caps |= NFS_CAP_NLINK;
2584 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2585 server->caps |= NFS_CAP_OWNER;
2586 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2587 server->caps |= NFS_CAP_OWNER_GROUP;
2588 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2589 server->caps |= NFS_CAP_ATIME;
2590 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2591 server->caps |= NFS_CAP_CTIME;
2592 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2593 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2594#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2595 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2596 server->caps |= NFS_CAP_SECURITY_LABEL;
2597#endif
2598 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2599 sizeof(server->attr_bitmask));
62ab460c 2600
aa9c2669
DQ		 2601 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2602 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2603 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2604 }
a65318bf
TM		 2605 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2606 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2607 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2608 server->acl_bitmask = res.acl_bitmask;
264e6351 2609 server->fh_expire_type = res.fh_expire_type;
1da177e4 2610 }
cccef3b9 2611
1da177e4
LT		 2612 return status;
2613}
2614
55a97593 2615int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2616{
2617 struct nfs4_exception exception = { };
2618 int err;
2619 do {
2620 err = nfs4_handle_exception(server,
2621 _nfs4_server_capabilities(server, fhandle),
2622 &exception);
2623 } while (exception.retry);
2624 return err;
2625}
2626
2627static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2628 struct nfs_fsinfo *info)
2629{
aa9c2669 2630 u32 bitmask[3];
1da177e4 2631 struct nfs4_lookup_root_arg args = {
aa9c2669 2632 .bitmask = bitmask,
1da177e4
LT		 2633 };
2634 struct nfs4_lookup_res res = {
2635 .server = server,
0e574af1 2636 .fattr = info->fattr,
1da177e4
LT		 2637 .fh = fhandle,
2638 };
2639 struct rpc_message msg = {
2640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2641 .rpc_argp = &args,
2642 .rpc_resp = &res,
2643 };
008f55d0 2644
aa9c2669
DQ		 2645 bitmask[0] = nfs4_fattr_bitmap[0];
2646 bitmask[1] = nfs4_fattr_bitmap[1];
2647 /*
2648 * Process the label in the upcoming getfattr
2649 */
2650 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2651
0e574af1 2652 nfs_fattr_init(info->fattr);
7c513058 2653 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2654}
2655
2656static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2657 struct nfs_fsinfo *info)
2658{
2659 struct nfs4_exception exception = { };
2660 int err;
2661 do {
fb8a5ba8
BS		 2662 err = _nfs4_lookup_root(server, fhandle, info);
2663 switch (err) {
2664 case 0:
2665 case -NFS4ERR_WRONGSEC:
05e9cfb4 2666 goto out;
fb8a5ba8
BS		 2667 default:
2668 err = nfs4_handle_exception(server, err, &exception);
2669 }
1da177e4 2670 } while (exception.retry);
05e9cfb4 2671out:
1da177e4
LT		 2672 return err;
2673}
2674
8f70e95f
BS		 2675static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2676 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2677{
2678 struct rpc_auth *auth;
2679 int ret;
2680
2681 auth = rpcauth_create(flavor, server->client);
e8d920c5 2682 if (IS_ERR(auth)) {
75bc8821 2683 ret = -EACCES;
8f70e95f
BS		 2684 goto out;
2685 }
2686 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2687out:
2688 return ret;
2689}
2690
9a744ba3
CL		 2691/*
2692 * Retry pseudoroot lookup with various security flavors. We do this when:
2693 *
2694 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2695 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2696 *
2697 * Returns zero on success, or a negative NFS4ERR value, or a
2698 * negative errno value.
2699 */
801a16dc 2700static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2701 struct nfs_fsinfo *info)
1da177e4 2702{
9a744ba3
CL		 2703 /* Per 3530bis 15.33.5 */
2704 static const rpc_authflavor_t flav_array[] = {
2705 RPC_AUTH_GSS_KRB5P,
2706 RPC_AUTH_GSS_KRB5I,
2707 RPC_AUTH_GSS_KRB5,
c4eafe11 2708 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2709 RPC_AUTH_NULL,
2710 };
2711 int status = -EPERM;
2712 size_t i;
6a1a1e34 2713
9a744ba3 2714 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2715 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2716 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2717 continue;
2718 break;
8f70e95f 2719 }
9a744ba3 2720
fb8a5ba8
BS		 2721 /*
2722 * -EACCESS could mean that the user doesn't have correct permissions
2723 * to access the mount. It could also mean that we tried to mount
2724 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2725 * existing mount programs don't handle -EACCES very well so it should
2726 * be mapped to -EPERM instead.
2727 */
2728 if (status == -EACCES)
2729 status = -EPERM;
801a16dc
BS		 2730 return status;
2731}
2732
2ed4b95b
CL		 2733static int nfs4_do_find_root_sec(struct nfs_server *server,
2734 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2735{
2736 int mv = server->nfs_client->cl_minorversion;
2737 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2738}
2739
2740/**
2741 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2742 * @server: initialized nfs_server handle
2743 * @fhandle: we fill in the pseudo-fs root file handle
2744 * @info: we fill in an FSINFO struct
2745 *
2746 * Returns zero on success, or a negative errno.
801a16dc 2747 */
3028eb2b
BS		 2748int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2749 struct nfs_fsinfo *info)
801a16dc 2750{
2ed4b95b
CL		 2751 int status;
2752
2753 status = nfs4_lookup_root(server, fhandle, info);
2754 if ((status == -NFS4ERR_WRONGSEC) &&
2755 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2756 status = nfs4_do_find_root_sec(server, fhandle, info);
2757
1da177e4
LT		 2758 if (status == 0)
2759 status = nfs4_server_capabilities(server, fhandle);
2760 if (status == 0)
2761 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2762
c12e87f4 2763 return nfs4_map_errors(status);
1da177e4
LT		 2764}
2765
bae36241
BS		 2766static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2767 struct nfs_fsinfo *info)
2768{
2769 int error;
2770 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2771 struct nfs4_label *label = NULL;
bae36241
BS		 2772
2773 error = nfs4_server_capabilities(server, mntfh);
2774 if (error < 0) {
2775 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2776 return error;
2777 }
2778
14c43f76
DQ		 2779 label = nfs4_label_alloc(server, GFP_KERNEL);
2780 if (IS_ERR(label))
2781 return PTR_ERR(label);
2782
1775fd3e 2783 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2784 if (error < 0) {
2785 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2786 goto err_free_label;
bae36241
BS		 2787 }
2788
2789 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2790 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2791 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2792
14c43f76
DQ		 2793err_free_label:
2794 nfs4_label_free(label);
2795
bae36241
BS		 2796 return error;
2797}
2798
6b97fd3d
MN		 2799/*
2800 * Get locations and (maybe) other attributes of a referral.
2801 * Note that we'll actually follow the referral later when
2802 * we detect fsid mismatch in inode revalidation
2803 */
f05d147f
BS		 2804static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2805 const struct qstr *name, struct nfs_fattr *fattr,
2806 struct nfs_fh *fhandle)
6b97fd3d
MN		 2807{
2808 int status = -ENOMEM;
2809 struct page *page = NULL;
2810 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2811
2812 page = alloc_page(GFP_KERNEL);
2813 if (page == NULL)
2814 goto out;
2815 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2816 if (locations == NULL)
2817 goto out;
2818
f05d147f 2819 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2820 if (status != 0)
2821 goto out;
2822 /* Make sure server returned a different fsid for the referral */
2823 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2824 dprintk("%s: server did not return a different fsid for"
2825 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2826 status = -EIO;
2827 goto out;
2828 }
533eb461
AA		 2829 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2830 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2831
533eb461 2832 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2833 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2834 memset(fhandle, 0, sizeof(struct nfs_fh));
2835out:
2836 if (page)
2837 __free_page(page);
5d7ca35a 2838 kfree(locations);
6b97fd3d
MN		 2839 return status;
2840}
2841
1775fd3e
DQ		 2842static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2843 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2844{
2845 struct nfs4_getattr_arg args = {
2846 .fh = fhandle,
2847 .bitmask = server->attr_bitmask,
2848 };
2849 struct nfs4_getattr_res res = {
2850 .fattr = fattr,
1775fd3e 2851 .label = label,
1da177e4
LT		 2852 .server = server,
2853 };
2854 struct rpc_message msg = {
2855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2856 .rpc_argp = &args,
2857 .rpc_resp = &res,
2858 };
aa9c2669
DQ		 2859
2860 args.bitmask = nfs4_bitmask(server, label);
2861
0e574af1 2862 nfs_fattr_init(fattr);
7c513058 2863 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2864}
2865
1775fd3e
DQ		 2866static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2867 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2868{
2869 struct nfs4_exception exception = { };
2870 int err;
2871 do {
2872 err = nfs4_handle_exception(server,
1775fd3e 2873 _nfs4_proc_getattr(server, fhandle, fattr, label),
1da177e4
LT		 2874 &exception);
2875 } while (exception.retry);
2876 return err;
2877}
2878
2879/*
2880 * The file is not closed if it is opened due to the a request to change
2881 * the size of the file. The open call will not be needed once the
2882 * VFS layer lookup-intents are implemented.
2883 *
2884 * Close is called when the inode is destroyed.
2885 * If we haven't opened the file for O_WRONLY, we
2886 * need to in the size_change case to obtain a stateid.
2887 *
2888 * Got race?
2889 * Because OPEN is always done by name in nfsv4, it is
2890 * possible that we opened a different file by the same
2891 * name. We can recognize this race condition, but we
2892 * can't do anything about it besides returning an error.
2893 *
2894 * This will be fixed with VFS changes (lookup-intent).
2895 */
2896static int
2897nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2898 struct iattr *sattr)
2899{
08e9eac4 2900 struct inode *inode = dentry->d_inode;
659bfcd6 2901 struct rpc_cred *cred = NULL;
d530838b 2902 struct nfs4_state *state = NULL;
14c43f76 2903 struct nfs4_label *label = NULL;
1da177e4
LT		 2904 int status;
2905
8a1636c4 2906 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2907 pnfs_commit_and_return_layout(inode);
8a1636c4 2908
0e574af1 2909 nfs_fattr_init(fattr);
1da177e4 2910
2669940d
AA		 2911 /* Deal with open(O_TRUNC) */
2912 if (sattr->ia_valid & ATTR_OPEN)
2913 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2914
2915 /* Optimization: if the end result is no change, don't RPC */
2916 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2917 return 0;
2918
d530838b 2919 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2920 if (sattr->ia_valid & ATTR_FILE) {
2921 struct nfs_open_context *ctx;
2922
2923 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2924 if (ctx) {
2925 cred = ctx->cred;
2926 state = ctx->state;
2927 }
659bfcd6 2928 }
08e9eac4 2929
14c43f76
DQ		 2930 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2931 if (IS_ERR(label))
2932 return PTR_ERR(label);
2933
2934 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2935 if (status == 0) {
65e4308d 2936 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2937 nfs_setsecurity(inode, fattr, label);
2938 }
14c43f76 2939 nfs4_label_free(label);
1da177e4
LT		 2940 return status;
2941}
2942
0c2e53f1
TM		 2943static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2944 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2945 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2946{
0c2e53f1 2947 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2948 int status;
2949 struct nfs4_lookup_arg args = {
2950 .bitmask = server->attr_bitmask,
0c2e53f1 2951 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2952 .name = name,
2953 };
2954 struct nfs4_lookup_res res = {
2955 .server = server,
2956 .fattr = fattr,
aa9c2669 2957 .label = label,
2b3de441
DH		 2958 .fh = fhandle,
2959 };
2960 struct rpc_message msg = {
2961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2962 .rpc_argp = &args,
2963 .rpc_resp = &res,
2964 };
2965
aa9c2669
DQ		 2966 args.bitmask = nfs4_bitmask(server, label);
2967
2b3de441
DH		 2968 nfs_fattr_init(fattr);
2969
1da177e4 2970 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2971 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2972 dprintk("NFS reply lookup: %d\n", status);
2973 return status;
2974}
2975
72de53ec 2976static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2977{
7ebb9315 2978 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2979 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2980 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2981 fattr->nlink = 2;
2982}
2983
72de53ec
BS		 2984static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2985 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2986 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2987{
2988 struct nfs4_exception exception = { };
72de53ec 2989 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2990 int err;
2991 do {
1775fd3e 2992 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
72de53ec 2993 switch (err) {
08ef7bd3 2994 case -NFS4ERR_BADNAME:
72de53ec
BS		 2995 err = -ENOENT;
2996 goto out;
0c2e53f1 2997 case -NFS4ERR_MOVED:
f05d147f 2998 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2999 goto out;
0c2e53f1 3000 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3001 err = -EPERM;
3002 if (client != *clnt)
3003 goto out;
3004
3005 client = nfs4_create_sec_client(client, dir, name);
3006 if (IS_ERR(client))
3007 return PTR_ERR(client);
3008
3009 exception.retry = 1;
3010 break;
3011 default:
3012 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3013 }
1da177e4 3014 } while (exception.retry);
72de53ec
BS		 3015
3016out:
3017 if (err == 0)
3018 *clnt = client;
3019 else if (client != *clnt)
3020 rpc_shutdown_client(client);
3021
1da177e4
LT		 3022 return err;
3023}
3024
80a16b21 3025static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3026 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3027 struct nfs4_label *label)
72de53ec
BS		 3028{
3029 int status;
3030 struct rpc_clnt *client = NFS_CLIENT(dir);
3031
1775fd3e 3032 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3033 if (client != NFS_CLIENT(dir)) {
3034 rpc_shutdown_client(client);
3035 nfs_fixup_secinfo_attributes(fattr);
3036 }
3037 return status;
3038}
3039
f05d147f
BS		 3040struct rpc_clnt *
3041nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3042 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3043{
3044 int status;
3045 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3046
1775fd3e 3047 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3048 if (status < 0) {
3049 rpc_shutdown_client(client);
3050 return ERR_PTR(status);
3051 }
3052 return client;
3053}
3054
1da177e4
LT		 3055static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3056{
76b32999 3057 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3058 struct nfs4_accessargs args = {
3059 .fh = NFS_FH(inode),
a4980e78 3060 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3061 };
3062 struct nfs4_accessres res = {
3063 .server = server,
1da177e4 3064 };
1da177e4
LT		 3065 struct rpc_message msg = {
3066 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3067 .rpc_argp = &args,
3068 .rpc_resp = &res,
3069 .rpc_cred = entry->cred,
3070 };
3071 int mode = entry->mask;
aa9c2669 3072 int status = 0;
1da177e4
LT		 3073
3074 /*
3075 * Determine which access bits we want to ask for...
3076 */
3077 if (mode & MAY_READ)
3078 args.access |= NFS4_ACCESS_READ;
3079 if (S_ISDIR(inode->i_mode)) {
3080 if (mode & MAY_WRITE)
3081 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3082 if (mode & MAY_EXEC)
3083 args.access |= NFS4_ACCESS_LOOKUP;
3084 } else {
3085 if (mode & MAY_WRITE)
3086 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3087 if (mode & MAY_EXEC)
3088 args.access |= NFS4_ACCESS_EXECUTE;
3089 }
c407d41a
TM		 3090
3091 res.fattr = nfs_alloc_fattr();
3092 if (res.fattr == NULL)
3093 return -ENOMEM;
3094
7c513058 3095 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3096 if (!status) {
6168f62c 3097 nfs_access_set_mask(entry, res.access);
c407d41a 3098 nfs_refresh_inode(inode, res.fattr);
1da177e4 3099 }
c407d41a 3100 nfs_free_fattr(res.fattr);
1da177e4
LT		 3101 return status;
3102}
3103
3104static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3105{
3106 struct nfs4_exception exception = { };
3107 int err;
3108 do {
3109 err = nfs4_handle_exception(NFS_SERVER(inode),
3110 _nfs4_proc_access(inode, entry),
3111 &exception);
3112 } while (exception.retry);
3113 return err;
3114}
3115
3116/*
3117 * TODO: For the time being, we don't try to get any attributes
3118 * along with any of the zero-copy operations READ, READDIR,
3119 * READLINK, WRITE.
3120 *
3121 * In the case of the first three, we want to put the GETATTR
3122 * after the read-type operation -- this is because it is hard
3123 * to predict the length of a GETATTR response in v4, and thus
3124 * align the READ data correctly. This means that the GETATTR
3125 * may end up partially falling into the page cache, and we should
3126 * shift it into the 'tail' of the xdr_buf before processing.
3127 * To do this efficiently, we need to know the total length
3128 * of data received, which doesn't seem to be available outside
3129 * of the RPC layer.
3130 *
3131 * In the case of WRITE, we also want to put the GETATTR after
3132 * the operation -- in this case because we want to make sure
140150db 3133 * we get the post-operation mtime and size.
1da177e4
LT		 3134 *
3135 * Both of these changes to the XDR layer would in fact be quite
3136 * minor, but I decided to leave them for a subsequent patch.
3137 */
3138static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3139 unsigned int pgbase, unsigned int pglen)
3140{
3141 struct nfs4_readlink args = {
3142 .fh = NFS_FH(inode),
3143 .pgbase = pgbase,
3144 .pglen = pglen,
3145 .pages = &page,
3146 };
f50c7000 3147 struct nfs4_readlink_res res;
1da177e4
LT		 3148 struct rpc_message msg = {
3149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3150 .rpc_argp = &args,
f50c7000 3151 .rpc_resp = &res,
1da177e4
LT		 3152 };
3153
7c513058 3154 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3155}
3156
3157static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3158 unsigned int pgbase, unsigned int pglen)
3159{
3160 struct nfs4_exception exception = { };
3161 int err;
3162 do {
3163 err = nfs4_handle_exception(NFS_SERVER(inode),
3164 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3165 &exception);
3166 } while (exception.retry);
3167 return err;
3168}
3169
1da177e4 3170/*
8867fe58 3171 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3172 */
1da177e4
LT		 3173static int
3174nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3175 int flags)
1da177e4 3176{
aa9c2669 3177 struct nfs4_label l, *ilabel = NULL;
8867fe58 3178 struct nfs_open_context *ctx;
1da177e4 3179 struct nfs4_state *state;
1da177e4
LT		 3180 int status = 0;
3181
8867fe58
MS		 3182 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3183 if (IS_ERR(ctx))
3184 return PTR_ERR(ctx);
3185
aa9c2669
DQ		 3186 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3187
a8a5da99 3188 sattr->ia_mode &= ~current_umask();
8626e4a4 3189 state = nfs4_do_open(dir, dentry, ctx->mode,
1775fd3e 3190 flags, sattr, ilabel, ctx->cred,
8626e4a4 3191 &ctx->mdsthreshold);
d4d9cdcb 3192 d_drop(dentry);
1da177e4
LT		 3193 if (IS_ERR(state)) {
3194 status = PTR_ERR(state);
c0204fd2 3195 goto out;
1da177e4 3196 }
d4d9cdcb 3197 d_add(dentry, igrab(state->inode));
d75340cc 3198 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3199 ctx->state = state;
1da177e4 3200out:
aa9c2669 3201 nfs4_label_release_security(ilabel);
8867fe58 3202 put_nfs_open_context(ctx);
1da177e4
LT		 3203 return status;
3204}
3205
3206static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3207{
16e42959 3208 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3209 struct nfs_removeargs args = {
1da177e4 3210 .fh = NFS_FH(dir),
26fe5750 3211 .name = *name,
16e42959 3212 };
4fdc17b2 3213 struct nfs_removeres res = {
16e42959 3214 .server = server,
1da177e4 3215 };
1da177e4 3216 struct rpc_message msg = {
4fdc17b2
TM		 3217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3218 .rpc_argp = &args,
3219 .rpc_resp = &res,
1da177e4 3220 };
778d2817 3221 int status;
1da177e4 3222
7c513058 3223 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3224 if (status == 0)
16e42959 3225 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3226 return status;
3227}
3228
3229static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3230{
3231 struct nfs4_exception exception = { };
3232 int err;
3233 do {
3234 err = nfs4_handle_exception(NFS_SERVER(dir),
3235 _nfs4_proc_remove(dir, name),
3236 &exception);
3237 } while (exception.retry);
3238 return err;
3239}
3240
e4eff1a6 3241static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3242{
e4eff1a6
TM		 3243 struct nfs_server *server = NFS_SERVER(dir);
3244 struct nfs_removeargs *args = msg->rpc_argp;
3245 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3246
e4eff1a6 3247 res->server = server;
1da177e4 3248 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3249 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3250
3251 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3252}
3253
34e137cc
BS		 3254static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3255{
d9afbd1b
TM		 3256 nfs4_setup_sequence(NFS_SERVER(data->dir),
3257 &data->args.seq_args,
3258 &data->res.seq_res,
3259 task);
1da177e4
LT		 3260}
3261
e4eff1a6 3262static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3263{
e4eff1a6
TM		 3264 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3265
14516c3a
TM		 3266 if (!nfs4_sequence_done(task, &res->seq_res))
3267 return 0;
9e33bed5 3268 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3269 return 0;
3270 update_changeattr(dir, &res->cinfo);
e4eff1a6 3271 return 1;
1da177e4
LT		 3272}
3273
d3d4152a
JL		 3274static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3275{
3276 struct nfs_server *server = NFS_SERVER(dir);
3277 struct nfs_renameargs *arg = msg->rpc_argp;
3278 struct nfs_renameres *res = msg->rpc_resp;
3279
3280 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3281 res->server = server;
9d12b216 3282 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3283}
3284
c6bfa1a1
BS		 3285static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3286{
d9afbd1b
TM		 3287 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3288 &data->args.seq_args,
3289 &data->res.seq_res,
3290 task);
d3d4152a
JL		 3291}
3292
3293static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3294 struct inode *new_dir)
3295{
3296 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3297
3298 if (!nfs4_sequence_done(task, &res->seq_res))
3299 return 0;
3300 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3301 return 0;
3302
3303 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3304 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3305 return 1;
3306}
3307
1da177e4
LT		 3308static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3309 struct inode *new_dir, struct qstr *new_name)
3310{
6caf2c82 3311 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3312 struct nfs_renameargs arg = {
1da177e4
LT		 3313 .old_dir = NFS_FH(old_dir),
3314 .new_dir = NFS_FH(new_dir),
3315 .old_name = old_name,
3316 .new_name = new_name,
6caf2c82 3317 };
e8582a8b 3318 struct nfs_renameres res = {
6caf2c82 3319 .server = server,
1da177e4 3320 };
1da177e4
LT		 3321 struct rpc_message msg = {
3322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3323 .rpc_argp = &arg,
3324 .rpc_resp = &res,
3325 };
011fff72 3326 int status = -ENOMEM;
14c43f76 3327
7c513058 3328 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3329 if (!status) {
3330 update_changeattr(old_dir, &res.old_cinfo);
3331 update_changeattr(new_dir, &res.new_cinfo);
3332 }
3333 return status;
3334}
3335
3336static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3337 struct inode *new_dir, struct qstr *new_name)
3338{
3339 struct nfs4_exception exception = { };
3340 int err;
3341 do {
3342 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3343 _nfs4_proc_rename(old_dir, old_name,
3344 new_dir, new_name),
3345 &exception);
3346 } while (exception.retry);
3347 return err;
3348}
3349
3350static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3351{
91ba2eee 3352 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3353 struct nfs4_link_arg arg = {
3354 .fh = NFS_FH(inode),
3355 .dir_fh = NFS_FH(dir),
3356 .name = name,
91ba2eee
TM		 3357 .bitmask = server->attr_bitmask,
3358 };
91ba2eee
TM		 3359 struct nfs4_link_res res = {
3360 .server = server,
1775fd3e 3361 .label = NULL,
1da177e4 3362 };
1da177e4
LT		 3363 struct rpc_message msg = {
3364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3365 .rpc_argp = &arg,
91ba2eee 3366 .rpc_resp = &res,
1da177e4 3367 };
136f2627
TM		 3368 int status = -ENOMEM;
3369
3370 res.fattr = nfs_alloc_fattr();
778d2817 3371 if (res.fattr == NULL)
136f2627 3372 goto out;
1da177e4 3373
14c43f76
DQ		 3374 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3375 if (IS_ERR(res.label)) {
3376 status = PTR_ERR(res.label);
3377 goto out;
3378 }
aa9c2669 3379 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3380
7c513058 3381 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3382 if (!status) {
3383 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3384 status = nfs_post_op_update_inode(inode, res.fattr);
3385 if (!status)
3386 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3387 }
14c43f76
DQ		 3388
3389
3390 nfs4_label_free(res.label);
3391
136f2627 3392out:
136f2627 3393 nfs_free_fattr(res.fattr);
1da177e4
LT		 3394 return status;
3395}
3396
3397static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3398{
3399 struct nfs4_exception exception = { };
3400 int err;
3401 do {
3402 err = nfs4_handle_exception(NFS_SERVER(inode),
3403 _nfs4_proc_link(inode, dir, name),
3404 &exception);
3405 } while (exception.retry);
3406 return err;
3407}
3408
57dc9a57
TM		 3409struct nfs4_createdata {
3410 struct rpc_message msg;
3411 struct nfs4_create_arg arg;
3412 struct nfs4_create_res res;
3413 struct nfs_fh fh;
3414 struct nfs_fattr fattr;
1775fd3e 3415 struct nfs4_label *label;
57dc9a57
TM		 3416};
3417
3418static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3419 struct qstr *name, struct iattr *sattr, u32 ftype)
3420{
3421 struct nfs4_createdata *data;
3422
3423 data = kzalloc(sizeof(*data), GFP_KERNEL);
3424 if (data != NULL) {
3425 struct nfs_server *server = NFS_SERVER(dir);
3426
14c43f76
DQ		 3427 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3428 if (IS_ERR(data->label))
3429 goto out_free;
3430
57dc9a57
TM		 3431 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3432 data->msg.rpc_argp = &data->arg;
3433 data->msg.rpc_resp = &data->res;
3434 data->arg.dir_fh = NFS_FH(dir);
3435 data->arg.server = server;
3436 data->arg.name = name;
3437 data->arg.attrs = sattr;
3438 data->arg.ftype = ftype;
aa9c2669 3439 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3440 data->res.server = server;
3441 data->res.fh = &data->fh;
3442 data->res.fattr = &data->fattr;
1775fd3e 3443 data->res.label = data->label;
57dc9a57 3444 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3445 }
3446 return data;
14c43f76
DQ		 3447out_free:
3448 kfree(data);
3449 return NULL;
57dc9a57
TM		 3450}
3451
3452static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3453{
7c513058 3454 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3455 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3456 if (status == 0) {
3457 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3458 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3459 }
3460 return status;
3461}
3462
3463static void nfs4_free_createdata(struct nfs4_createdata *data)
3464{
14c43f76 3465 nfs4_label_free(data->label);
57dc9a57
TM		 3466 kfree(data);
3467}
3468
4f390c15 3469static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3470 struct page *page, unsigned int len, struct iattr *sattr,
3471 struct nfs4_label *label)
1da177e4 3472{
57dc9a57
TM		 3473 struct nfs4_createdata *data;
3474 int status = -ENAMETOOLONG;
1da177e4 3475
94a6d753 3476 if (len > NFS4_MAXPATHLEN)
57dc9a57 3477 goto out;
4f390c15 3478
57dc9a57
TM		 3479 status = -ENOMEM;
3480 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3481 if (data == NULL)
3482 goto out;
3483
3484 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3485 data->arg.u.symlink.pages = &page;
3486 data->arg.u.symlink.len = len;
1775fd3e 3487 data->arg.label = label;
1da177e4 3488
57dc9a57
TM		 3489 status = nfs4_do_create(dir, dentry, data);
3490
3491 nfs4_free_createdata(data);
3492out:
1da177e4
LT		 3493 return status;
3494}
3495
4f390c15 3496static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3497 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3498{
3499 struct nfs4_exception exception = { };
aa9c2669 3500 struct nfs4_label l, *label = NULL;
1da177e4 3501 int err;
aa9c2669
DQ		 3502
3503 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3504
1da177e4
LT		 3505 do {
3506 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753 3507 _nfs4_proc_symlink(dir, dentry, page,
1775fd3e 3508 len, sattr, label),
1da177e4
LT		 3509 &exception);
3510 } while (exception.retry);
aa9c2669
DQ		 3511
3512 nfs4_label_release_security(label);
1da177e4
LT		 3513 return err;
3514}
3515
3516static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3517 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3518{
57dc9a57
TM		 3519 struct nfs4_createdata *data;
3520 int status = -ENOMEM;
1da177e4 3521
57dc9a57
TM		 3522 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3523 if (data == NULL)
3524 goto out;
3525
1775fd3e 3526 data->arg.label = label;
57dc9a57
TM		 3527 status = nfs4_do_create(dir, dentry, data);
3528
3529 nfs4_free_createdata(data);
3530out:
1da177e4
LT		 3531 return status;
3532}
3533
3534static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3535 struct iattr *sattr)
3536{
3537 struct nfs4_exception exception = { };
aa9c2669 3538 struct nfs4_label l, *label = NULL;
1da177e4 3539 int err;
a8a5da99 3540
aa9c2669
DQ		 3541 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3542
a8a5da99 3543 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3544 do {
3545 err = nfs4_handle_exception(NFS_SERVER(dir),
1775fd3e 3546 _nfs4_proc_mkdir(dir, dentry, sattr, label),
1da177e4
LT		 3547 &exception);
3548 } while (exception.retry);
aa9c2669
DQ		 3549 nfs4_label_release_security(label);
3550
1da177e4
LT		 3551 return err;
3552}
3553
3554static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3555 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3556{
3557 struct inode *dir = dentry->d_inode;
3558 struct nfs4_readdir_arg args = {
3559 .fh = NFS_FH(dir),
56e4ebf8 3560 .pages = pages,
1da177e4
LT		 3561 .pgbase = 0,
3562 .count = count,
96d25e53 3563 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3564 .plus = plus,
1da177e4
LT		 3565 };
3566 struct nfs4_readdir_res res;
3567 struct rpc_message msg = {
3568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3569 .rpc_argp = &args,
3570 .rpc_resp = &res,
3571 .rpc_cred = cred,
3572 };
3573 int status;
3574
3110ff80 3575 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3576 dentry->d_parent->d_name.name,
3577 dentry->d_name.name,
3578 (unsigned long long)cookie);
c3f52af3 3579 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3580 res.pgbase = args.pgbase;
7c513058 3581 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3582 if (status >= 0) {
c3f52af3 3583 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3584 status += args.pgbase;
3585 }
c4812998
TM		 3586
3587 nfs_invalidate_atime(dir);
3588
3110ff80 3589 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3590 return status;
3591}
3592
3593static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3594 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3595{
3596 struct nfs4_exception exception = { };
3597 int err;
3598 do {
3599 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3600 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3601 pages, count, plus),
1da177e4
LT		 3602 &exception);
3603 } while (exception.retry);
3604 return err;
3605}
3606
3607static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3608 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3609{
57dc9a57
TM		 3610 struct nfs4_createdata *data;
3611 int mode = sattr->ia_mode;
3612 int status = -ENOMEM;
1da177e4 3613
57dc9a57
TM		 3614 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3615 if (data == NULL)
3616 goto out;
3617
1da177e4 3618 if (S_ISFIFO(mode))
57dc9a57 3619 data->arg.ftype = NF4FIFO;
1da177e4 3620 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3621 data->arg.ftype = NF4BLK;
3622 data->arg.u.device.specdata1 = MAJOR(rdev);
3623 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3624 }
3625 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3626 data->arg.ftype = NF4CHR;
3627 data->arg.u.device.specdata1 = MAJOR(rdev);
3628 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3629 } else if (!S_ISSOCK(mode)) {
3630 status = -EINVAL;
3631 goto out_free;
1da177e4 3632 }
1775fd3e 3633
aa9c2669 3634 data->arg.label = label;
57dc9a57 3635 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3636out_free:
57dc9a57
TM		 3637 nfs4_free_createdata(data);
3638out:
1da177e4
LT		 3639 return status;
3640}
3641
3642static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3643 struct iattr *sattr, dev_t rdev)
3644{
3645 struct nfs4_exception exception = { };
aa9c2669 3646 struct nfs4_label l, *label = NULL;
1da177e4 3647 int err;
a8a5da99 3648
aa9c2669
DQ		 3649 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3650
a8a5da99 3651 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3652 do {
3653 err = nfs4_handle_exception(NFS_SERVER(dir),
aa9c2669 3654 _nfs4_proc_mknod(dir, dentry, sattr, label, rdev),
1da177e4
LT		 3655 &exception);
3656 } while (exception.retry);
aa9c2669
DQ		 3657
3658 nfs4_label_release_security(label);
3659
1da177e4
LT		 3660 return err;
3661}
3662
3663static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3664 struct nfs_fsstat *fsstat)
3665{
3666 struct nfs4_statfs_arg args = {
3667 .fh = fhandle,
3668 .bitmask = server->attr_bitmask,
3669 };
24ad148a
BH		 3670 struct nfs4_statfs_res res = {
3671 .fsstat = fsstat,
3672 };
1da177e4
LT		 3673 struct rpc_message msg = {
3674 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3675 .rpc_argp = &args,
24ad148a 3676 .rpc_resp = &res,
1da177e4
LT		 3677 };
3678
0e574af1 3679 nfs_fattr_init(fsstat->fattr);
7c513058 3680 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3681}
3682
3683static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3684{
3685 struct nfs4_exception exception = { };
3686 int err;
3687 do {
3688 err = nfs4_handle_exception(server,
3689 _nfs4_proc_statfs(server, fhandle, fsstat),
3690 &exception);
3691 } while (exception.retry);
3692 return err;
3693}
3694
3695static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3696 struct nfs_fsinfo *fsinfo)
3697{
3698 struct nfs4_fsinfo_arg args = {
3699 .fh = fhandle,
3700 .bitmask = server->attr_bitmask,
3701 };
3dda5e43
BH		 3702 struct nfs4_fsinfo_res res = {
3703 .fsinfo = fsinfo,
3704 };
1da177e4
LT		 3705 struct rpc_message msg = {
3706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3707 .rpc_argp = &args,
3dda5e43 3708 .rpc_resp = &res,
1da177e4
LT		 3709 };
3710
7c513058 3711 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3712}
3713
3714static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3715{
3716 struct nfs4_exception exception = { };
83ca7f5a 3717 unsigned long now = jiffies;
1da177e4
LT		 3718 int err;
3719
3720 do {
83ca7f5a
CL		 3721 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3722 if (err == 0) {
3723 struct nfs_client *clp = server->nfs_client;
3724
3725 spin_lock(&clp->cl_lock);
3726 clp->cl_lease_time = fsinfo->lease_time * HZ;
3727 clp->cl_last_renewal = now;
3728 spin_unlock(&clp->cl_lock);
3729 break;
3730 }
3731 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3732 } while (exception.retry);
3733 return err;
3734}
3735
3736static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3737{
e38eb650
BS		 3738 int error;
3739
0e574af1 3740 nfs_fattr_init(fsinfo->fattr);
e38eb650 3741 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3742 if (error == 0) {
3743 /* block layout checks this! */
3744 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3745 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3746 }
e38eb650
BS		 3747
3748 return error;
1da177e4
LT		 3749}
3750
3751static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3752 struct nfs_pathconf *pathconf)
3753{
3754 struct nfs4_pathconf_arg args = {
3755 .fh = fhandle,
3756 .bitmask = server->attr_bitmask,
3757 };
d45b2989
BH		 3758 struct nfs4_pathconf_res res = {
3759 .pathconf = pathconf,
3760 };
1da177e4
LT		 3761 struct rpc_message msg = {
3762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3763 .rpc_argp = &args,
d45b2989 3764 .rpc_resp = &res,
1da177e4
LT		 3765 };
3766
3767 /* None of the pathconf attributes are mandatory to implement */
3768 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3769 memset(pathconf, 0, sizeof(*pathconf));
3770 return 0;
3771 }
3772
0e574af1 3773 nfs_fattr_init(pathconf->fattr);
7c513058 3774 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3775}
3776
3777static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3778 struct nfs_pathconf *pathconf)
3779{
3780 struct nfs4_exception exception = { };
3781 int err;
3782
3783 do {
3784 err = nfs4_handle_exception(server,
3785 _nfs4_proc_pathconf(server, fhandle, pathconf),
3786 &exception);
3787 } while (exception.retry);
3788 return err;
3789}
3790
5521abfd 3791int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3792 const struct nfs_open_context *ctx,
3793 const struct nfs_lock_context *l_ctx,
3794 fmode_t fmode)
3795{
3796 const struct nfs_lockowner *lockowner = NULL;
3797
3798 if (l_ctx != NULL)
3799 lockowner = &l_ctx->lockowner;
5521abfd 3800 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3801}
3802EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3803
5521abfd
TM		 3804static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3805 const struct nfs_open_context *ctx,
3806 const struct nfs_lock_context *l_ctx,
3807 fmode_t fmode)
3808{
3809 nfs4_stateid current_stateid;
3810
3811 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3812 return false;
3813 return nfs4_stateid_match(stateid, &current_stateid);
3814}
3815
3816static bool nfs4_error_stateid_expired(int err)
3817{
3818 switch (err) {
3819 case -NFS4ERR_DELEG_REVOKED:
3820 case -NFS4ERR_ADMIN_REVOKED:
3821 case -NFS4ERR_BAD_STATEID:
3822 case -NFS4ERR_STALE_STATEID:
3823 case -NFS4ERR_OLD_STATEID:
3824 case -NFS4ERR_OPENMODE:
3825 case -NFS4ERR_EXPIRED:
3826 return true;
3827 }
3828 return false;
3829}
3830
d20581aa
BH		 3831void __nfs4_read_done_cb(struct nfs_read_data *data)
3832{
cd841605 3833 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3834}
3835
cbdabc7f 3836static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3837{
cd841605 3838 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3839
9e33bed5 3840 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3841 rpc_restart_call_prepare(task);
ec06c096 3842 return -EAGAIN;
1da177e4 3843 }
8850df99 3844
d20581aa 3845 __nfs4_read_done_cb(data);
1da177e4 3846 if (task->tk_status > 0)
ec06c096
TM		 3847 renew_lease(server, data->timestamp);
3848 return 0;
1da177e4
LT		 3849}
3850
5521abfd
TM		 3851static bool nfs4_read_stateid_changed(struct rpc_task *task,
3852 struct nfs_readargs *args)
3853{
3854
3855 if (!nfs4_error_stateid_expired(task->tk_status) ||
3856 nfs4_stateid_is_current(&args->stateid,
3857 args->context,
3858 args->lock_context,
3859 FMODE_READ))
3860 return false;
3861 rpc_restart_call_prepare(task);
3862 return true;
3863}
3864
cbdabc7f
AA		 3865static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3866{
3867
3868 dprintk("--> %s\n", __func__);
3869
3870 if (!nfs4_sequence_done(task, &data->res.seq_res))
3871 return -EAGAIN;
5521abfd
TM		 3872 if (nfs4_read_stateid_changed(task, &data->args))
3873 return -EAGAIN;
d20581aa
BH		 3874 return data->read_done_cb ? data->read_done_cb(task, data) :
3875 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3876}
3877
bdc7f021 3878static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3879{
1da177e4 3880 data->timestamp = jiffies;
cbdabc7f 3881 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3882 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3883 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3884}
3885
ea7c3303
BS		 3886static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3887{
9b206149 3888 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3889 &data->args.seq_args,
3890 &data->res.seq_res,
9b206149
TM		 3891 task))
3892 return;
3893 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3894 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3895}
3896
b029bc9b 3897static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3898{
cd841605 3899 struct inode *inode = data->header->inode;
1da177e4 3900
9e33bed5 3901 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3902 rpc_restart_call_prepare(task);
788e7a89 3903 return -EAGAIN;
1da177e4 3904 }
4f9838c7 3905 if (task->tk_status >= 0) {
1da177e4 3906 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3907 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3908 }
788e7a89 3909 return 0;
1da177e4
LT		 3910}
3911
5521abfd
TM		 3912static bool nfs4_write_stateid_changed(struct rpc_task *task,
3913 struct nfs_writeargs *args)
3914{
3915
3916 if (!nfs4_error_stateid_expired(task->tk_status) ||
3917 nfs4_stateid_is_current(&args->stateid,
3918 args->context,
3919 args->lock_context,
3920 FMODE_WRITE))
3921 return false;
3922 rpc_restart_call_prepare(task);
3923 return true;
3924}
3925
b029bc9b
FI		 3926static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3927{
3928 if (!nfs4_sequence_done(task, &data->res.seq_res))
3929 return -EAGAIN;
5521abfd
TM		 3930 if (nfs4_write_stateid_changed(task, &data->args))
3931 return -EAGAIN;
d20581aa
BH		 3932 return data->write_done_cb ? data->write_done_cb(task, data) :
3933 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3934}
3935
5a37f851
TM		 3936static
3937bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3938{
5a37f851
TM		 3939 const struct nfs_pgio_header *hdr = data->header;
3940
3941 /* Don't request attributes for pNFS or O_DIRECT writes */
3942 if (data->ds_clp != NULL || hdr->dreq != NULL)
3943 return false;
3944 /* Otherwise, request attributes if and only if we don't hold
3945 * a delegation
3946 */
011e2a7f 3947 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3948}
a69aef14 3949
bdc7f021 3950static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3951{
cd841605 3952 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3953
5a37f851 3954 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3955 data->args.bitmask = NULL;
3956 data->res.fattr = NULL;
3957 } else
3958 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3959
b029bc9b
FI		 3960 if (!data->write_done_cb)
3961 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3962 data->res.server = server;
1da177e4
LT		 3963 data->timestamp = jiffies;
3964
bdc7f021 3965 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3966 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3967}
3968
c6cb80d0
BS		 3969static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3970{
9b206149 3971 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3972 &data->args.seq_args,
3973 &data->res.seq_res,
9b206149
TM		 3974 task))
3975 return;
3976 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3977 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3978}
3979
0b7c0153 3980static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3981{
d9afbd1b
TM		 3982 nfs4_setup_sequence(NFS_SERVER(data->inode),
3983 &data->args.seq_args,
3984 &data->res.seq_res,
3985 task);
1da177e4
LT		 3986}
3987
0b7c0153 3988static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3989{
1da177e4 3990 struct inode *inode = data->inode;
14516c3a 3991
9e33bed5 3992 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3993 rpc_restart_call_prepare(task);
788e7a89 3994 return -EAGAIN;
1da177e4 3995 }
788e7a89 3996 return 0;
1da177e4
LT		 3997}
3998
0b7c0153 3999static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4000{
4001 if (!nfs4_sequence_done(task, &data->res.seq_res))
4002 return -EAGAIN;
0b7c0153 4003 return data->commit_done_cb(task, data);
5f452431
FI		 4004}
4005
0b7c0153 4006static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4007{
788e7a89 4008 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4009
0b7c0153
FI		 4010 if (data->commit_done_cb == NULL)
4011 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4012 data->res.server = server;
bdc7f021 4013 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4014 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4015}
4016
9bc4e3ca
CL		 4017struct nfs4_renewdata {
4018 struct nfs_client *client;
4019 unsigned long timestamp;
4020};
4021
1da177e4
LT		 4022/*
4023 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4024 * standalone procedure for queueing an asynchronous RENEW.
4025 */
9bc4e3ca 4026static void nfs4_renew_release(void *calldata)
dc96aef9 4027{
9bc4e3ca
CL		 4028 struct nfs4_renewdata *data = calldata;
4029 struct nfs_client *clp = data->client;
dc96aef9 4030
0851de06
AB		 4031 if (atomic_read(&clp->cl_count) > 1)
4032 nfs4_schedule_state_renewal(clp);
4033 nfs_put_client(clp);
9bc4e3ca 4034 kfree(data);
dc96aef9
AB		 4035}
4036
9bc4e3ca 4037static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4038{
9bc4e3ca
CL		 4039 struct nfs4_renewdata *data = calldata;
4040 struct nfs_client *clp = data->client;
4041 unsigned long timestamp = data->timestamp;
1da177e4
LT		 4042
4043 if (task->tk_status < 0) {
95baa25c 4044 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4045 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4046 return;
4047 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4048 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4049 return;
4050 }
4051 nfs4_schedule_path_down_recovery(clp);
1da177e4 4052 }
452e9352 4053 do_renew_lease(clp, timestamp);
1da177e4
LT		 4054}
4055
963d8fe5
TM		 4056static const struct rpc_call_ops nfs4_renew_ops = {
4057 .rpc_call_done = nfs4_renew_done,
dc96aef9 4058 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4059};
4060
2f60ea6b 4061static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4062{
4063 struct rpc_message msg = {
4064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4065 .rpc_argp = clp,
b4454fe1 4066 .rpc_cred = cred,
1da177e4 4067 };
9bc4e3ca 4068 struct nfs4_renewdata *data;
1da177e4 4069
2f60ea6b
TM		 4070 if (renew_flags == 0)
4071 return 0;
0851de06
AB		 4072 if (!atomic_inc_not_zero(&clp->cl_count))
4073 return -EIO;
b569ad34 4074 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4075 if (data == NULL)
4076 return -ENOMEM;
4077 data->client = clp;
4078 data->timestamp = jiffies;
bc7a05ca 4079 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4080 &nfs4_renew_ops, data);
1da177e4
LT		 4081}
4082
8534d4ec 4083static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4084{
4085 struct rpc_message msg = {
4086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4087 .rpc_argp = clp,
b4454fe1 4088 .rpc_cred = cred,
1da177e4
LT		 4089 };
4090 unsigned long now = jiffies;
4091 int status;
4092
bc7a05ca 4093 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4094 if (status < 0)
4095 return status;
452e9352 4096 do_renew_lease(clp, now);
1da177e4
LT		 4097 return 0;
4098}
4099
aa1870af
BF		 4100static inline int nfs4_server_supports_acls(struct nfs_server *server)
4101{
4102 return (server->caps & NFS_CAP_ACLS)
4103 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4104 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4105}
4106
21f498c2
TM		 4107/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4108 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4109 * the stack.
4110 */
21f498c2 4111#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4112
e9e3d724
NH		 4113static int buf_to_pages_noslab(const void *buf, size_t buflen,
4114 struct page **pages, unsigned int *pgbase)
4115{
4116 struct page *newpage, **spages;
4117 int rc = 0;
4118 size_t len;
4119 spages = pages;
4120
4121 do {
21f498c2 4122 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4123 newpage = alloc_page(GFP_KERNEL);
4124
4125 if (newpage == NULL)
4126 goto unwind;
4127 memcpy(page_address(newpage), buf, len);
4128 buf += len;
4129 buflen -= len;
4130 *pages++ = newpage;
4131 rc++;
4132 } while (buflen != 0);
4133
4134 return rc;
4135
4136unwind:
4137 for(; rc > 0; rc--)
4138 __free_page(spages[rc-1]);
4139 return -ENOMEM;
4140}
4141
e50a1c2e
BF		 4142struct nfs4_cached_acl {
4143 int cached;
4144 size_t len;
3e9d4154 4145 char data[0];
e50a1c2e
BF		 4146};
4147
4148static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4149{
4150 struct nfs_inode *nfsi = NFS_I(inode);
4151
4152 spin_lock(&inode->i_lock);
4153 kfree(nfsi->nfs4_acl);
4154 nfsi->nfs4_acl = acl;
4155 spin_unlock(&inode->i_lock);
4156}
4157
4158static void nfs4_zap_acl_attr(struct inode *inode)
4159{
4160 nfs4_set_cached_acl(inode, NULL);
4161}
4162
4163static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4164{
4165 struct nfs_inode *nfsi = NFS_I(inode);
4166 struct nfs4_cached_acl *acl;
4167 int ret = -ENOENT;
4168
4169 spin_lock(&inode->i_lock);
4170 acl = nfsi->nfs4_acl;
4171 if (acl == NULL)
4172 goto out;
4173 if (buf == NULL) /* user is just asking for length */
4174 goto out_len;
4175 if (acl->cached == 0)
4176 goto out;
4177 ret = -ERANGE; /* see getxattr(2) man page */
4178 if (acl->len > buflen)
4179 goto out;
4180 memcpy(buf, acl->data, acl->len);
4181out_len:
4182 ret = acl->len;
4183out:
4184 spin_unlock(&inode->i_lock);
4185 return ret;
4186}
4187
5794d21e 4188static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4189{
4190 struct nfs4_cached_acl *acl;
b291f1b1 4191 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4192
1f1ea6c2 4193 if (buflen <= PAGE_SIZE) {
b291f1b1 4194 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4195 if (acl == NULL)
4196 goto out;
4197 acl->cached = 1;
5794d21e 4198 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4199 } else {
4200 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4201 if (acl == NULL)
4202 goto out;
4203 acl->cached = 0;
4204 }
4205 acl->len = acl_len;
4206out:
4207 nfs4_set_cached_acl(inode, acl);
4208}
4209
bf118a34
AA		 4210/*
4211 * The getxattr API returns the required buffer length when called with a
4212 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4213 * the required buf. On a NULL buf, we send a page of data to the server
4214 * guessing that the ACL request can be serviced by a page. If so, we cache
4215 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4216 * the cache. If not so, we throw away the page, and cache the required
4217 * length. The next getxattr call will then produce another round trip to
4218 * the server, this time with the input buf of the required size.
4219 */
16b4289c 4220static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4221{
bf118a34 4222 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4223 struct nfs_getaclargs args = {
4224 .fh = NFS_FH(inode),
4225 .acl_pages = pages,
4226 .acl_len = buflen,
4227 };
663c79b3
BH		 4228 struct nfs_getaclres res = {
4229 .acl_len = buflen,
4230 };
aa1870af
BF		 4231 struct rpc_message msg = {
4232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4233 .rpc_argp = &args,
663c79b3 4234 .rpc_resp = &res,
aa1870af 4235 };
21f498c2
TM		 4236 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4237 int ret = -ENOMEM, i;
aa1870af 4238
bf118a34
AA		 4239 /* As long as we're doing a round trip to the server anyway,
4240 * let's be prepared for a page of acl data. */
4241 if (npages == 0)
4242 npages = 1;
21f498c2
TM		 4243 if (npages > ARRAY_SIZE(pages))
4244 return -ERANGE;
5a006899 4245
bf118a34
AA		 4246 for (i = 0; i < npages; i++) {
4247 pages[i] = alloc_page(GFP_KERNEL);
4248 if (!pages[i])
4249 goto out_free;
e50a1c2e 4250 }
5a006899
SP		 4251
4252 /* for decoding across pages */
4253 res.acl_scratch = alloc_page(GFP_KERNEL);
4254 if (!res.acl_scratch)
4255 goto out_free;
4256
bf118a34
AA		 4257 args.acl_len = npages * PAGE_SIZE;
4258 args.acl_pgbase = 0;
5a006899 4259
de040bec 4260 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4261 __func__, buf, buflen, npages, args.acl_len);
4262 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4263 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4264 if (ret)
4265 goto out_free;
bf118a34 4266
1f1ea6c2
TM		 4267 /* Handle the case where the passed-in buffer is too short */
4268 if (res.acl_flags & NFS4_ACL_TRUNC) {
4269 /* Did the user only issue a request for the acl length? */
4270 if (buf == NULL)
4271 goto out_ok;
e50a1c2e 4272 ret = -ERANGE;
1f1ea6c2 4273 goto out_free;
e50a1c2e 4274 }
1f1ea6c2 4275 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4276 if (buf) {
4277 if (res.acl_len > buflen) {
4278 ret = -ERANGE;
4279 goto out_free;
4280 }
1f1ea6c2 4281 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4282 }
1f1ea6c2
TM		 4283out_ok:
4284 ret = res.acl_len;
e50a1c2e 4285out_free:
bf118a34
AA		 4286 for (i = 0; i < npages; i++)
4287 if (pages[i])
4288 __free_page(pages[i]);
331818f1
TM		 4289 if (res.acl_scratch)
4290 __free_page(res.acl_scratch);
aa1870af
BF		 4291 return ret;
4292}
4293
16b4289c
TM		 4294static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4295{
4296 struct nfs4_exception exception = { };
4297 ssize_t ret;
4298 do {
4299 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4300 if (ret >= 0)
4301 break;
4302 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4303 } while (exception.retry);
4304 return ret;
4305}
4306
e50a1c2e
BF		 4307static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4308{
4309 struct nfs_server *server = NFS_SERVER(inode);
4310 int ret;
4311
4312 if (!nfs4_server_supports_acls(server))
4313 return -EOPNOTSUPP;
4314 ret = nfs_revalidate_inode(server, inode);
4315 if (ret < 0)
4316 return ret;
08a22b39
AK		 4317 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4318 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4319 ret = nfs4_read_cached_acl(inode, buf, buflen);
4320 if (ret != -ENOENT)
bf118a34
AA		 4321 /* -ENOENT is returned if there is no ACL or if there is an ACL
4322 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4323 return ret;
4324 return nfs4_get_acl_uncached(inode, buf, buflen);
4325}
4326
16b4289c 4327static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4328{
4329 struct nfs_server *server = NFS_SERVER(inode);
4330 struct page *pages[NFS4ACL_MAXPAGES];
4331 struct nfs_setaclargs arg = {
4332 .fh = NFS_FH(inode),
4333 .acl_pages = pages,
4334 .acl_len = buflen,
4335 };
73c403a9 4336 struct nfs_setaclres res;
4b580ee3
BF		 4337 struct rpc_message msg = {
4338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4339 .rpc_argp = &arg,
73c403a9 4340 .rpc_resp = &res,
4b580ee3 4341 };
21f498c2 4342 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4343 int ret, i;
4b580ee3
BF		 4344
4345 if (!nfs4_server_supports_acls(server))
4346 return -EOPNOTSUPP;
21f498c2
TM		 4347 if (npages > ARRAY_SIZE(pages))
4348 return -ERANGE;
e9e3d724
NH		 4349 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4350 if (i < 0)
4351 return i;
57ec14c5 4352 nfs4_inode_return_delegation(inode);
7c513058 4353 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4354
4355 /*
4356 * Free each page after tx, so the only ref left is
4357 * held by the network stack
4358 */
4359 for (; i > 0; i--)
4360 put_page(pages[i-1]);
4361
08a22b39
AK		 4362 /*
4363 * Acl update can result in inode attribute update.
4364 * so mark the attribute cache invalid.
4365 */
4366 spin_lock(&inode->i_lock);
4367 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4368 spin_unlock(&inode->i_lock);
f41f7418
TM		 4369 nfs_access_zap_cache(inode);
4370 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4371 return ret;
4372}
4373
16b4289c
TM		 4374static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4375{
4376 struct nfs4_exception exception = { };
4377 int err;
4378 do {
4379 err = nfs4_handle_exception(NFS_SERVER(inode),
4380 __nfs4_proc_set_acl(inode, buf, buflen),
4381 &exception);
4382 } while (exception.retry);
4383 return err;
4384}
4385
aa9c2669
DQ		 4386#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4387static int _nfs4_get_security_label(struct inode *inode, void *buf,
4388 size_t buflen)
4389{
4390 struct nfs_server *server = NFS_SERVER(inode);
4391 struct nfs_fattr fattr;
4392 struct nfs4_label label = {0, 0, buflen, buf};
4393
4394 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4395 struct nfs4_getattr_arg args = {
4396 .fh = NFS_FH(inode),
4397 .bitmask = bitmask,
4398 };
4399 struct nfs4_getattr_res res = {
4400 .fattr = &fattr,
4401 .label = &label,
4402 .server = server,
4403 };
4404 struct rpc_message msg = {
4405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4406 .rpc_argp = &args,
4407 .rpc_resp = &res,
4408 };
4409 int ret;
4410
4411 nfs_fattr_init(&fattr);
4412
4413 ret = rpc_call_sync(server->client, &msg, 0);
4414 if (ret)
4415 return ret;
4416 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4417 return -ENOENT;
4418 if (buflen < label.len)
4419 return -ERANGE;
4420 return 0;
4421}
4422
4423static int nfs4_get_security_label(struct inode *inode, void *buf,
4424 size_t buflen)
4425{
4426 struct nfs4_exception exception = { };
4427 int err;
4428
4429 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4430 return -EOPNOTSUPP;
4431
4432 do {
4433 err = nfs4_handle_exception(NFS_SERVER(inode),
4434 _nfs4_get_security_label(inode, buf, buflen),
4435 &exception);
4436 } while (exception.retry);
4437 return err;
4438}
4439
4440static int _nfs4_do_set_security_label(struct inode *inode,
4441 struct nfs4_label *ilabel,
4442 struct nfs_fattr *fattr,
4443 struct nfs4_label *olabel)
4444{
4445
4446 struct iattr sattr = {0};
4447 struct nfs_server *server = NFS_SERVER(inode);
4448 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4449 struct nfs_setattrargs args = {
4450 .fh = NFS_FH(inode),
4451 .iap = &sattr,
4452 .server = server,
4453 .bitmask = bitmask,
4454 .label = ilabel,
4455 };
4456 struct nfs_setattrres res = {
4457 .fattr = fattr,
4458 .label = olabel,
4459 .server = server,
4460 };
4461 struct rpc_message msg = {
4462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4463 .rpc_argp = &args,
4464 .rpc_resp = &res,
4465 };
4466 int status;
4467
4468 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4469
4470 status = rpc_call_sync(server->client, &msg, 0);
4471 if (status)
4472 dprintk("%s failed: %d\n", __func__, status);
4473
4474 return status;
4475}
4476
4477static int nfs4_do_set_security_label(struct inode *inode,
4478 struct nfs4_label *ilabel,
4479 struct nfs_fattr *fattr,
4480 struct nfs4_label *olabel)
4481{
4482 struct nfs4_exception exception = { };
4483 int err;
4484
4485 do {
4486 err = nfs4_handle_exception(NFS_SERVER(inode),
4487 _nfs4_do_set_security_label(inode, ilabel,
4488 fattr, olabel),
4489 &exception);
4490 } while (exception.retry);
4491 return err;
4492}
4493
4494static int
4495nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4496{
4497 struct nfs4_label ilabel, *olabel = NULL;
4498 struct nfs_fattr fattr;
4499 struct rpc_cred *cred;
4500 struct inode *inode = dentry->d_inode;
4501 int status;
4502
4503 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4504 return -EOPNOTSUPP;
4505
4506 nfs_fattr_init(&fattr);
4507
4508 ilabel.pi = 0;
4509 ilabel.lfs = 0;
4510 ilabel.label = (char *)buf;
4511 ilabel.len = buflen;
4512
4513 cred = rpc_lookup_cred();
4514 if (IS_ERR(cred))
4515 return PTR_ERR(cred);
4516
4517 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4518 if (IS_ERR(olabel)) {
4519 status = -PTR_ERR(olabel);
4520 goto out;
4521 }
4522
4523 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4524 if (status == 0)
4525 nfs_setsecurity(inode, &fattr, olabel);
4526
4527 nfs4_label_free(olabel);
4528out:
4529 put_rpccred(cred);
4530 return status;
4531}
4532#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4533
4534
1da177e4 4535static int
aa5190d0 4536nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4537{
aa5190d0
TM		 4538 struct nfs_client *clp = server->nfs_client;
4539
4540 if (task->tk_status >= 0)
1da177e4
LT		 4541 return 0;
4542 switch(task->tk_status) {
a1d0b5ee 4543 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4544 case -NFS4ERR_ADMIN_REVOKED:
4545 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4546 if (state == NULL)
4547 break;
4548 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4549 case -NFS4ERR_OPENMODE:
4550 if (state == NULL)
4551 break;
5d422301
TM		 4552 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4553 goto stateid_invalid;
0400a6b0 4554 goto wait_on_recovery;
0ced63d1 4555 case -NFS4ERR_EXPIRED:
5d422301
TM		 4556 if (state != NULL) {
4557 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4558 goto stateid_invalid;
4559 }
1da177e4 4560 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4561 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4562 nfs4_schedule_lease_recovery(clp);
4563 goto wait_on_recovery;
4745e315
AA		 4564#if defined(CONFIG_NFS_V4_1)
4565 case -NFS4ERR_BADSESSION:
4566 case -NFS4ERR_BADSLOT:
4567 case -NFS4ERR_BAD_HIGH_SLOT:
4568 case -NFS4ERR_DEADSESSION:
4569 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4570 case -NFS4ERR_SEQ_FALSE_RETRY:
4571 case -NFS4ERR_SEQ_MISORDERED:
4572 dprintk("%s ERROR %d, Reset session\n", __func__,
4573 task->tk_status);
9f594791 4574 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4575 task->tk_status = 0;
4576 return -EAGAIN;
4577#endif /* CONFIG_NFS_V4_1 */
1da177e4 4578 case -NFS4ERR_DELAY:
aa5190d0 4579 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4580 case -NFS4ERR_GRACE:
1da177e4
LT		 4581 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4582 task->tk_status = 0;
4583 return -EAGAIN;
a8a4ae3a 4584 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4585 case -NFS4ERR_OLD_STATEID:
4586 task->tk_status = 0;
4587 return -EAGAIN;
4588 }
4589 task->tk_status = nfs4_map_errors(task->tk_status);
4590 return 0;
5d422301
TM		 4591stateid_invalid:
4592 task->tk_status = -EIO;
4593 return 0;
0400a6b0 4594wait_on_recovery:
a2c0b9e2 4595 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4596 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4597 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4598 task->tk_status = 0;
4599 return -EAGAIN;
1da177e4
LT		 4600}
4601
f092075d
CL		 4602static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4603 nfs4_verifier *bootverf)
cd93710e
CL		 4604{
4605 __be32 verf[2];
4606
2c820d9a
CL		 4607 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4608 /* An impossible timestamp guarantees this value
4609 * will never match a generated boot time. */
4610 verf[0] = 0;
4611 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4612 } else {
f092075d
CL		 4613 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4614 verf[0] = (__be32)nn->boot_time.tv_sec;
4615 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4616 }
cd93710e
CL		 4617 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4618}
4619
e984a55a
CL		 4620static unsigned int
4621nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4622 char *buf, size_t len)
4623{
4624 unsigned int result;
4625
4626 rcu_read_lock();
4627 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4628 clp->cl_ipaddr,
4629 rpc_peeraddr2str(clp->cl_rpcclient,
4630 RPC_DISPLAY_ADDR),
4631 rpc_peeraddr2str(clp->cl_rpcclient,
4632 RPC_DISPLAY_PROTO));
4633 rcu_read_unlock();
4634 return result;
4635}
4636
4637static unsigned int
4638nfs4_init_uniform_client_string(const struct nfs_client *clp,
4639 char *buf, size_t len)
4640{
6f2ea7f2
CL		 4641 char *nodename = clp->cl_rpcclient->cl_nodename;
4642
4643 if (nfs4_client_id_uniquifier[0] != '\0')
4644 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4645 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4646 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4647 nodename);
e984a55a
CL		 4648}
4649
6bbb4ae8
CL		 4650/**
4651 * nfs4_proc_setclientid - Negotiate client ID
4652 * @clp: state data structure
4653 * @program: RPC program for NFSv4 callback service
4654 * @port: IP port number for NFS4 callback service
4655 * @cred: RPC credential to use for this call
4656 * @res: where to place the result
4657 *
4658 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4659 */
bb8b27e5
TM		 4660int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4661 unsigned short port, struct rpc_cred *cred,
4662 struct nfs4_setclientid_res *res)
1da177e4
LT		 4663{
4664 nfs4_verifier sc_verifier;
4665 struct nfs4_setclientid setclientid = {
4666 .sc_verifier = &sc_verifier,
4667 .sc_prog = program,
f4eecd5d 4668 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4669 };
4670 struct rpc_message msg = {
4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4672 .rpc_argp = &setclientid,
bb8b27e5 4673 .rpc_resp = res,
286d7d6a 4674 .rpc_cred = cred,
1da177e4 4675 };
6bbb4ae8 4676 int status;
1da177e4 4677
de734831 4678 /* nfs_client_id4 */
f092075d 4679 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4680 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4681 setclientid.sc_name_len =
4682 nfs4_init_uniform_client_string(clp,
4683 setclientid.sc_name,
4684 sizeof(setclientid.sc_name));
4685 else
4686 setclientid.sc_name_len =
4687 nfs4_init_nonuniform_client_string(clp,
4688 setclientid.sc_name,
4689 sizeof(setclientid.sc_name));
de734831 4690 /* cb_client4 */
e984a55a 4691 rcu_read_lock();
de734831 4692 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4693 sizeof(setclientid.sc_netid),
4694 rpc_peeraddr2str(clp->cl_rpcclient,
4695 RPC_DISPLAY_NETID));
de734831
CL		 4696 rcu_read_unlock();
4697 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4698 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4699 clp->cl_ipaddr, port >> 8, port & 255);
4700
6bbb4ae8
CL		 4701 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4702 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4703 setclientid.sc_name_len, setclientid.sc_name);
4704 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4705 dprintk("NFS reply setclientid: %d\n", status);
4706 return status;
1da177e4
LT		 4707}
4708
6bbb4ae8
CL		 4709/**
4710 * nfs4_proc_setclientid_confirm - Confirm client ID
4711 * @clp: state data structure
4712 * @res: result of a previous SETCLIENTID
4713 * @cred: RPC credential to use for this call
4714 *
4715 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4716 */
fd954ae1 4717int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4718 struct nfs4_setclientid_res *arg,
4719 struct rpc_cred *cred)
1da177e4 4720{
1da177e4
LT		 4721 struct rpc_message msg = {
4722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4723 .rpc_argp = arg,
286d7d6a 4724 .rpc_cred = cred,
1da177e4 4725 };
1da177e4
LT		 4726 int status;
4727
6bbb4ae8
CL		 4728 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4729 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4730 clp->cl_clientid);
1bd714f2 4731 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4732 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4733 return status;
4734}
4735
fe650407
TM		 4736struct nfs4_delegreturndata {
4737 struct nfs4_delegreturnargs args;
fa178f29 4738 struct nfs4_delegreturnres res;
fe650407
TM		 4739 struct nfs_fh fh;
4740 nfs4_stateid stateid;
26e976a8 4741 unsigned long timestamp;
fa178f29 4742 struct nfs_fattr fattr;
fe650407
TM		 4743 int rpc_status;
4744};
4745
fe650407
TM		 4746static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4747{
4748 struct nfs4_delegreturndata *data = calldata;
938e1010 4749
14516c3a
TM		 4750 if (!nfs4_sequence_done(task, &data->res.seq_res))
4751 return;
938e1010 4752
79708861
RL		 4753 switch (task->tk_status) {
4754 case -NFS4ERR_STALE_STATEID:
4755 case -NFS4ERR_EXPIRED:
4756 case 0:
fa178f29 4757 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4758 break;
4759 default:
4760 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4761 -EAGAIN) {
d00c5d43 4762 rpc_restart_call_prepare(task);
79708861
RL		 4763 return;
4764 }
4765 }
4766 data->rpc_status = task->tk_status;
fe650407
TM		 4767}
4768
4769static void nfs4_delegreturn_release(void *calldata)
4770{
fe650407
TM		 4771 kfree(calldata);
4772}
4773
938e1010
AA		 4774#if defined(CONFIG_NFS_V4_1)
4775static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4776{
4777 struct nfs4_delegreturndata *d_data;
4778
4779 d_data = (struct nfs4_delegreturndata *)data;
4780
d9afbd1b
TM		 4781 nfs4_setup_sequence(d_data->res.server,
4782 &d_data->args.seq_args,
4783 &d_data->res.seq_res,
4784 task);
938e1010
AA		 4785}
4786#endif /* CONFIG_NFS_V4_1 */
4787
c8d149f3 4788static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4789#if defined(CONFIG_NFS_V4_1)
4790 .rpc_call_prepare = nfs4_delegreturn_prepare,
4791#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4792 .rpc_call_done = nfs4_delegreturn_done,
4793 .rpc_release = nfs4_delegreturn_release,
4794};
4795
e6f81075 4796static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4797{
4798 struct nfs4_delegreturndata *data;
fa178f29 4799 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4800 struct rpc_task *task;
5138fde0
TM		 4801 struct rpc_message msg = {
4802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4803 .rpc_cred = cred,
4804 };
c970aa85
TM		 4805 struct rpc_task_setup task_setup_data = {
4806 .rpc_client = server->client,
5138fde0 4807 .rpc_message = &msg,
c970aa85
TM		 4808 .callback_ops = &nfs4_delegreturn_ops,
4809 .flags = RPC_TASK_ASYNC,
4810 };
e6f81075 4811 int status = 0;
fe650407 4812
8535b2be 4813 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4814 if (data == NULL)
4815 return -ENOMEM;
9d12b216 4816 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4817 data->args.fhandle = &data->fh;
4818 data->args.stateid = &data->stateid;
9e907fec 4819 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4820 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4821 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4822 data->res.fattr = &data->fattr;
4823 data->res.server = server;
5138fde0 4824 nfs_fattr_init(data->res.fattr);
26e976a8 4825 data->timestamp = jiffies;
fe650407
TM		 4826 data->rpc_status = 0;
4827
c970aa85 4828 task_setup_data.callback_data = data;
1174dd1f
TM		 4829 msg.rpc_argp = &data->args;
4830 msg.rpc_resp = &data->res;
c970aa85 4831 task = rpc_run_task(&task_setup_data);
7a1218a2 4832 if (IS_ERR(task))
fe650407 4833 return PTR_ERR(task);
e6f81075
TM		 4834 if (!issync)
4835 goto out;
fe650407 4836 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4837 if (status != 0)
4838 goto out;
4839 status = data->rpc_status;
e144cbcc
TM		 4840 if (status == 0)
4841 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4842 else
4843 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4844out:
e6b3c4db 4845 rpc_put_task(task);
fe650407 4846 return status;
1da177e4
LT		 4847}
4848
e6f81075 4849int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4850{
4851 struct nfs_server *server = NFS_SERVER(inode);
4852 struct nfs4_exception exception = { };
4853 int err;
4854 do {
e6f81075 4855 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4856 switch (err) {
4857 case -NFS4ERR_STALE_STATEID:
4858 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4859 case 0:
4860 return 0;
4861 }
4862 err = nfs4_handle_exception(server, err, &exception);
4863 } while (exception.retry);
4864 return err;
4865}
4866
4867#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4868#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4869
4870/*
4871 * sleep, with exponential backoff, and retry the LOCK operation.
4872 */
4873static unsigned long
4874nfs4_set_lock_task_retry(unsigned long timeout)
4875{
d310310c 4876 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4877 timeout <<= 1;
4878 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4879 return NFS4_LOCK_MAXTIMEOUT;
4880 return timeout;
4881}
4882
1da177e4
LT		 4883static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4884{
4885 struct inode *inode = state->inode;
4886 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4887 struct nfs_client *clp = server->nfs_client;
911d1aaf 4888 struct nfs_lockt_args arg = {
1da177e4 4889 .fh = NFS_FH(inode),
911d1aaf 4890 .fl = request,
1da177e4 4891 };
911d1aaf
TM		 4892 struct nfs_lockt_res res = {
4893 .denied = request,
1da177e4
LT		 4894 };
4895 struct rpc_message msg = {
4896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4897 .rpc_argp = &arg,
4898 .rpc_resp = &res,
4899 .rpc_cred = state->owner->so_cred,
4900 };
1da177e4
LT		 4901 struct nfs4_lock_state *lsp;
4902 int status;
4903
911d1aaf 4904 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4905 status = nfs4_set_lock_state(state, request);
4906 if (status != 0)
4907 goto out;
4908 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4909 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4910 arg.lock_owner.s_dev = server->s_dev;
7c513058 4911 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4912 switch (status) {
4913 case 0:
4914 request->fl_type = F_UNLCK;
4915 break;
4916 case -NFS4ERR_DENIED:
4917 status = 0;
1da177e4 4918 }
70cc6487 4919 request->fl_ops->fl_release_private(request);
8d0a8a9d 4920out:
1da177e4
LT		 4921 return status;
4922}
4923
4924static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4925{
4926 struct nfs4_exception exception = { };
4927 int err;
4928
4929 do {
4930 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4931 _nfs4_proc_getlk(state, cmd, request),
4932 &exception);
4933 } while (exception.retry);
4934 return err;
4935}
4936
4937static int do_vfs_lock(struct file *file, struct file_lock *fl)
4938{
4939 int res = 0;
4940 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4941 case FL_POSIX:
4942 res = posix_lock_file_wait(file, fl);
4943 break;
4944 case FL_FLOCK:
4945 res = flock_lock_file_wait(file, fl);
4946 break;
4947 default:
4948 BUG();
4949 }
1da177e4
LT		 4950 return res;
4951}
4952
faf5f49c 4953struct nfs4_unlockdata {
911d1aaf
TM		 4954 struct nfs_locku_args arg;
4955 struct nfs_locku_res res;
faf5f49c
TM		 4956 struct nfs4_lock_state *lsp;
4957 struct nfs_open_context *ctx;
911d1aaf
TM		 4958 struct file_lock fl;
4959 const struct nfs_server *server;
26e976a8 4960 unsigned long timestamp;
faf5f49c
TM		 4961};
4962
911d1aaf
TM		 4963static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4964 struct nfs_open_context *ctx,
4965 struct nfs4_lock_state *lsp,
4966 struct nfs_seqid *seqid)
4967{
4968 struct nfs4_unlockdata *p;
4969 struct inode *inode = lsp->ls_state->inode;
4970
8535b2be 4971 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4972 if (p == NULL)
4973 return NULL;
4974 p->arg.fh = NFS_FH(inode);
4975 p->arg.fl = &p->fl;
4976 p->arg.seqid = seqid;
c1d51931 4977 p->res.seqid = seqid;
911d1aaf
TM		 4978 p->arg.stateid = &lsp->ls_stateid;
4979 p->lsp = lsp;
4980 atomic_inc(&lsp->ls_count);
4981 /* Ensure we don't close file until we're done freeing locks! */
4982 p->ctx = get_nfs_open_context(ctx);
4983 memcpy(&p->fl, fl, sizeof(p->fl));
4984 p->server = NFS_SERVER(inode);
4985 return p;
4986}
4987
06f814a3 4988static void nfs4_locku_release_calldata(void *data)
faf5f49c 4989{
963d8fe5 4990 struct nfs4_unlockdata *calldata = data;
911d1aaf 4991 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4992 nfs4_put_lock_state(calldata->lsp);
4993 put_nfs_open_context(calldata->ctx);
4994 kfree(calldata);
faf5f49c
TM		 4995}
4996
963d8fe5 4997static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4998{
963d8fe5 4999 struct nfs4_unlockdata *calldata = data;
faf5f49c 5000
14516c3a
TM		 5001 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5002 return;
faf5f49c
TM		 5003 switch (task->tk_status) {
5004 case 0:
f597c537
TM		 5005 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5006 &calldata->res.stateid);
26e976a8 5007 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5008 break;
9e33bed5
TM		 5009 case -NFS4ERR_BAD_STATEID:
5010 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5011 case -NFS4ERR_STALE_STATEID:
5012 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5013 break;
5014 default:
9e33bed5 5015 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5016 rpc_restart_call_prepare(task);
faf5f49c 5017 }
2b1bc308 5018 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5019}
5020
4ce70ada 5021static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5022{
4ce70ada 5023 struct nfs4_unlockdata *calldata = data;
faf5f49c 5024
911d1aaf 5025 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5026 goto out_wait;
795a88c9 5027 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5028 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5029 goto out_no_action;
faf5f49c 5030 }
26e976a8 5031 calldata->timestamp = jiffies;
035168ab 5032 if (nfs4_setup_sequence(calldata->server,
a893693c 5033 &calldata->arg.seq_args,
2240a9e2
TM		 5034 &calldata->res.seq_res,
5035 task) != 0)
5036 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5037 return;
5038out_no_action:
5039 task->tk_action = NULL;
5040out_wait:
5041 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5042}
5043
963d8fe5 5044static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5045 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5046 .rpc_call_done = nfs4_locku_done,
06f814a3 5047 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5048};
5049
a5d16a4d
TM		 5050static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5051 struct nfs_open_context *ctx,
5052 struct nfs4_lock_state *lsp,
5053 struct nfs_seqid *seqid)
5054{
5055 struct nfs4_unlockdata *data;
5138fde0
TM		 5056 struct rpc_message msg = {
5057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5058 .rpc_cred = ctx->cred,
5059 };
c970aa85
TM		 5060 struct rpc_task_setup task_setup_data = {
5061 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5062 .rpc_message = &msg,
c970aa85 5063 .callback_ops = &nfs4_locku_ops,
101070ca 5064 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5065 .flags = RPC_TASK_ASYNC,
5066 };
a5d16a4d 5067
137d6aca
FF		 5068 /* Ensure this is an unlock - when canceling a lock, the
5069 * canceled lock is passed in, and it won't be an unlock.
5070 */
5071 fl->fl_type = F_UNLCK;
5072
a5d16a4d
TM		 5073 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5074 if (data == NULL) {
5075 nfs_free_seqid(seqid);
5076 return ERR_PTR(-ENOMEM);
5077 }
5078
9d12b216 5079 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5080 msg.rpc_argp = &data->arg;
5081 msg.rpc_resp = &data->res;
c970aa85
TM		 5082 task_setup_data.callback_data = data;
5083 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5084}
5085
faf5f49c
TM		 5086static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5087{
65b62a29
TM		 5088 struct inode *inode = state->inode;
5089 struct nfs4_state_owner *sp = state->owner;
5090 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5091 struct nfs_seqid *seqid;
1da177e4 5092 struct nfs4_lock_state *lsp;
06f814a3
TM		 5093 struct rpc_task *task;
5094 int status = 0;
536ff0f8 5095 unsigned char fl_flags = request->fl_flags;
faf5f49c 5096
8d0a8a9d 5097 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5098 /* Unlock _before_ we do the RPC call */
5099 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5100 /* Exclude nfs_delegation_claim_locks() */
5101 mutex_lock(&sp->so_delegreturn_mutex);
5102 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5103 down_read(&nfsi->rwsem);
5104 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5105 up_read(&nfsi->rwsem);
65b62a29 5106 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5107 goto out;
19e03c57
TM		 5108 }
5109 up_read(&nfsi->rwsem);
65b62a29 5110 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5111 if (status != 0)
9b073574
TM		 5112 goto out;
5113 /* Is this a delegated lock? */
8d0a8a9d 5114 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5115 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5116 goto out;
8535b2be 5117 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5118 status = -ENOMEM;
911d1aaf 5119 if (seqid == NULL)
9b073574 5120 goto out;
cd3758e3 5121 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5122 status = PTR_ERR(task);
5123 if (IS_ERR(task))
9b073574 5124 goto out;
a5d16a4d 5125 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5126 rpc_put_task(task);
9b073574 5127out:
536ff0f8 5128 request->fl_flags = fl_flags;
1da177e4
LT		 5129 return status;
5130}
5131
a5d16a4d
TM		 5132struct nfs4_lockdata {
5133 struct nfs_lock_args arg;
5134 struct nfs_lock_res res;
5135 struct nfs4_lock_state *lsp;
5136 struct nfs_open_context *ctx;
5137 struct file_lock fl;
26e976a8 5138 unsigned long timestamp;
a5d16a4d
TM		 5139 int rpc_status;
5140 int cancelled;
66179efe 5141 struct nfs_server *server;
a5d16a4d
TM		 5142};
5143
5144static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5145 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5146 gfp_t gfp_mask)
1da177e4 5147{
a5d16a4d
TM		 5148 struct nfs4_lockdata *p;
5149 struct inode *inode = lsp->ls_state->inode;
1da177e4 5150 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5151
8535b2be 5152 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5153 if (p == NULL)
5154 return NULL;
5155
5156 p->arg.fh = NFS_FH(inode);
5157 p->arg.fl = &p->fl;
8535b2be 5158 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5159 if (p->arg.open_seqid == NULL)
5160 goto out_free;
8535b2be 5161 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5162 if (p->arg.lock_seqid == NULL)
2f74c0a0 5163 goto out_free_seqid;
a5d16a4d 5164 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5165 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5166 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5167 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5168 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5169 p->lsp = lsp;
66179efe 5170 p->server = server;
a5d16a4d
TM		 5171 atomic_inc(&lsp->ls_count);
5172 p->ctx = get_nfs_open_context(ctx);
5173 memcpy(&p->fl, fl, sizeof(p->fl));
5174 return p;
2f74c0a0
TM		 5175out_free_seqid:
5176 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5177out_free:
5178 kfree(p);
5179 return NULL;
5180}
5181
5182static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5183{
5184 struct nfs4_lockdata *data = calldata;
5185 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5186
3110ff80 5187 dprintk("%s: begin!\n", __func__);
2f74c0a0 5188 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5189 goto out_wait;
a5d16a4d
TM		 5190 /* Do we need to do an open_to_lock_owner? */
5191 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5192 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5193 goto out_release_lock_seqid;
8fe72bac 5194 }
8e472f33 5195 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5196 data->arg.new_lock_owner = 1;
c1d51931 5197 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5198 } else
5199 data->arg.new_lock_owner = 0;
5d422301
TM		 5200 if (!nfs4_valid_open_stateid(state)) {
5201 data->rpc_status = -EBADF;
5202 task->tk_action = NULL;
5203 goto out_release_open_seqid;
5204 }
26e976a8 5205 data->timestamp = jiffies;
035168ab
TM		 5206 if (nfs4_setup_sequence(data->server,
5207 &data->arg.seq_args,
2240a9e2 5208 &data->res.seq_res,
d9afbd1b 5209 task) == 0)
66179efe 5210 return;
5d422301 5211out_release_open_seqid:
2240a9e2
TM		 5212 nfs_release_seqid(data->arg.open_seqid);
5213out_release_lock_seqid:
5214 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5215out_wait:
5216 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5217 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5218}
5219
a5d16a4d
TM		 5220static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5221{
5222 struct nfs4_lockdata *data = calldata;
5223
3110ff80 5224 dprintk("%s: begin!\n", __func__);
a5d16a4d 5225
14516c3a
TM		 5226 if (!nfs4_sequence_done(task, &data->res.seq_res))
5227 return;
66179efe 5228
a5d16a4d 5229 data->rpc_status = task->tk_status;
a5d16a4d 5230 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5231 if (data->rpc_status == 0)
5232 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5233 else
5234 goto out;
5235 }
5236 if (data->rpc_status == 0) {
f597c537 5237 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5238 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5239 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5240 }
a5d16a4d 5241out:
3110ff80 5242 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5243}
5244
5245static void nfs4_lock_release(void *calldata)
5246{
5247 struct nfs4_lockdata *data = calldata;
5248
3110ff80 5249 dprintk("%s: begin!\n", __func__);
2f74c0a0 5250 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5251 if (data->cancelled != 0) {
5252 struct rpc_task *task;
5253 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5254 data->arg.lock_seqid);
5255 if (!IS_ERR(task))
bf294b41 5256 rpc_put_task_async(task);
3110ff80 5257 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5258 } else
5259 nfs_free_seqid(data->arg.lock_seqid);
5260 nfs4_put_lock_state(data->lsp);
5261 put_nfs_open_context(data->ctx);
5262 kfree(data);
3110ff80 5263 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5264}
5265
5266static const struct rpc_call_ops nfs4_lock_ops = {
5267 .rpc_call_prepare = nfs4_lock_prepare,
5268 .rpc_call_done = nfs4_lock_done,
5269 .rpc_release = nfs4_lock_release,
5270};
5271
2bee72a6
TM		 5272static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5273{
2bee72a6
TM		 5274 switch (error) {
5275 case -NFS4ERR_ADMIN_REVOKED:
5276 case -NFS4ERR_BAD_STATEID:
ecac799a 5277 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5278 if (new_lock_owner != 0 ||
795a88c9 5279 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5280 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5281 break;
5282 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5283 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5284 case -NFS4ERR_EXPIRED:
5285 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5286 };
5287}
5288
afe6c27c 5289static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5290{
5291 struct nfs4_lockdata *data;
5292 struct rpc_task *task;
5138fde0
TM		 5293 struct rpc_message msg = {
5294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5295 .rpc_cred = state->owner->so_cred,
5296 };
c970aa85
TM		 5297 struct rpc_task_setup task_setup_data = {
5298 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5299 .rpc_message = &msg,
c970aa85 5300 .callback_ops = &nfs4_lock_ops,
101070ca 5301 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5302 .flags = RPC_TASK_ASYNC,
5303 };
a5d16a4d
TM		 5304 int ret;
5305
3110ff80 5306 dprintk("%s: begin!\n", __func__);
cd3758e3 5307 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5308 fl->fl_u.nfs4_fl.owner,
5309 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5310 if (data == NULL)
5311 return -ENOMEM;
5312 if (IS_SETLKW(cmd))
5313 data->arg.block = 1;
9d12b216 5314 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5315 msg.rpc_argp = &data->arg;
5316 msg.rpc_resp = &data->res;
c970aa85 5317 task_setup_data.callback_data = data;
8fe72bac
TM		 5318 if (recovery_type > NFS_LOCK_NEW) {
5319 if (recovery_type == NFS_LOCK_RECLAIM)
5320 data->arg.reclaim = NFS_LOCK_RECLAIM;
5321 nfs4_set_sequence_privileged(&data->arg.seq_args);
5322 }
c970aa85 5323 task = rpc_run_task(&task_setup_data);
7a1218a2 5324 if (IS_ERR(task))
a5d16a4d 5325 return PTR_ERR(task);
a5d16a4d
TM		 5326 ret = nfs4_wait_for_completion_rpc_task(task);
5327 if (ret == 0) {
5328 ret = data->rpc_status;
2bee72a6
TM		 5329 if (ret)
5330 nfs4_handle_setlk_error(data->server, data->lsp,
5331 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5332 } else
5333 data->cancelled = 1;
e6b3c4db 5334 rpc_put_task(task);
3110ff80 5335 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5336 return ret;
1da177e4
LT		 5337}
5338
5339static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5340{
202b50dc 5341 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5342 struct nfs4_exception exception = {
5343 .inode = state->inode,
5344 };
202b50dc
TM		 5345 int err;
5346
5347 do {
42a2d13e
TM		 5348 /* Cache the lock if possible... */
5349 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5350 return 0;
afe6c27c 5351 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5352 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5353 break;
5354 nfs4_handle_exception(server, err, &exception);
5355 } while (exception.retry);
5356 return err;
1da177e4
LT		 5357}
5358
5359static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5360{
202b50dc 5361 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5362 struct nfs4_exception exception = {
5363 .inode = state->inode,
5364 };
202b50dc
TM		 5365 int err;
5366
6bfc93ef
TM		 5367 err = nfs4_set_lock_state(state, request);
5368 if (err != 0)
5369 return err;
202b50dc 5370 do {
42a2d13e
TM		 5371 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5372 return 0;
afe6c27c 5373 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5374 switch (err) {
5375 default:
5376 goto out;
5377 case -NFS4ERR_GRACE:
5378 case -NFS4ERR_DELAY:
5379 nfs4_handle_exception(server, err, &exception);
5380 err = 0;
5381 }
202b50dc 5382 } while (exception.retry);
a9ed2e25 5383out:
202b50dc 5384 return err;
1da177e4
LT		 5385}
5386
f062eb6c 5387#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5388/**
5389 * nfs41_check_expired_locks - possibly free a lock stateid
5390 *
5391 * @state: NFSv4 state for an inode
5392 *
5393 * Returns NFS_OK if recovery for this stateid is now finished.
5394 * Otherwise a negative NFS4ERR value is returned.
5395 */
b01dd1d8 5396static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5397{
eb64cf96 5398 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5399 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5400 struct nfs_server *server = NFS_SERVER(state->inode);
5401
b01dd1d8 5402 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5403 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5404 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5405 if (status != NFS_OK) {
3e60ffdd
CL		 5406 /* Free the stateid unless the server
5407 * informs us the stateid is unrecognized. */
89af2739
CL		 5408 if (status != -NFS4ERR_BAD_STATEID)
5409 nfs41_free_stateid(server,
5410 &lsp->ls_stateid);
795a88c9 5411 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5412 ret = status;
5413 }
5414 }
5415 };
5416
5417 return ret;
5418}
5419
5420static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5421{
5422 int status = NFS_OK;
5423
5424 if (test_bit(LK_STATE_IN_USE, &state->flags))
5425 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5426 if (status != NFS_OK)
5427 status = nfs4_lock_expired(state, request);
5428 return status;
f062eb6c
BS		 5429}
5430#endif
5431
1da177e4
LT		 5432static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5433{
9a99af49 5434 struct nfs4_state_owner *sp = state->owner;
19e03c57 5435 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5436 unsigned char fl_flags = request->fl_flags;
9a99af49 5437 unsigned int seq;
8e469ebd 5438 int status = -ENOLCK;
1da177e4 5439
8e469ebd
TM		 5440 if ((fl_flags & FL_POSIX) &&
5441 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5442 goto out;
6bfc93ef 5443 /* Is this a delegated open? */
6bfc93ef
TM		 5444 status = nfs4_set_lock_state(state, request);
5445 if (status != 0)
5446 goto out;
01c3b861
TM		 5447 request->fl_flags |= FL_ACCESS;
5448 status = do_vfs_lock(request->fl_file, request);
5449 if (status < 0)
5450 goto out;
19e03c57 5451 down_read(&nfsi->rwsem);
01c3b861 5452 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5453 /* Yes: cache locks! */
01c3b861 5454 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5455 request->fl_flags = fl_flags & ~FL_SLEEP;
5456 status = do_vfs_lock(request->fl_file, request);
5457 goto out_unlock;
01c3b861 5458 }
9a99af49
TM		 5459 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5460 up_read(&nfsi->rwsem);
afe6c27c 5461 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5462 if (status != 0)
9a99af49
TM		 5463 goto out;
5464 down_read(&nfsi->rwsem);
5465 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5466 status = -NFS4ERR_DELAY;
01c3b861 5467 goto out_unlock;
9a99af49 5468 }
6bfc93ef 5469 /* Note: we always want to sleep here! */
01c3b861 5470 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5471 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5472 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5473 "manager!\n", __func__);
01c3b861 5474out_unlock:
19e03c57 5475 up_read(&nfsi->rwsem);
01c3b861
TM		 5476out:
5477 request->fl_flags = fl_flags;
1da177e4
LT		 5478 return status;
5479}
5480
5481static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5482{
a1d0b5ee
TM		 5483 struct nfs4_exception exception = {
5484 .state = state,
05ffe24f 5485 .inode = state->inode,
a1d0b5ee 5486 };
1da177e4
LT		 5487 int err;
5488
5489 do {
965b5d67
TM		 5490 err = _nfs4_proc_setlk(state, cmd, request);
5491 if (err == -NFS4ERR_DENIED)
5492 err = -EAGAIN;
1da177e4 5493 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5494 err, &exception);
1da177e4
LT		 5495 } while (exception.retry);
5496 return err;
5497}
5498
5499static int
5500nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5501{
5502 struct nfs_open_context *ctx;
5503 struct nfs4_state *state;
5504 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5505 int status;
5506
5507 /* verify open state */
cd3758e3 5508 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5509 state = ctx->state;
5510
5511 if (request->fl_start < 0 || request->fl_end < 0)
5512 return -EINVAL;
5513
d953126a
TM		 5514 if (IS_GETLK(cmd)) {
5515 if (state != NULL)
5516 return nfs4_proc_getlk(state, F_GETLK, request);
5517 return 0;
5518 }
1da177e4
LT		 5519
5520 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5521 return -EINVAL;
5522
d953126a
TM		 5523 if (request->fl_type == F_UNLCK) {
5524 if (state != NULL)
5525 return nfs4_proc_unlck(state, cmd, request);
5526 return 0;
5527 }
1da177e4 5528
d953126a
TM		 5529 if (state == NULL)
5530 return -ENOLCK;
55725513
TM		 5531 /*
5532 * Don't rely on the VFS having checked the file open mode,
5533 * since it won't do this for flock() locks.
5534 */
f44106e2 5535 switch (request->fl_type) {
55725513
TM		 5536 case F_RDLCK:
5537 if (!(filp->f_mode & FMODE_READ))
5538 return -EBADF;
5539 break;
5540 case F_WRLCK:
5541 if (!(filp->f_mode & FMODE_WRITE))
5542 return -EBADF;
5543 }
5544
1da177e4
LT		 5545 do {
5546 status = nfs4_proc_setlk(state, cmd, request);
5547 if ((status != -EAGAIN) || IS_SETLK(cmd))
5548 break;
5549 timeout = nfs4_set_lock_task_retry(timeout);
5550 status = -ERESTARTSYS;
5551 if (signalled())
5552 break;
5553 } while(status < 0);
1da177e4
LT		 5554 return status;
5555}
5556
db4f2e63 5557int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5558{
5559 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5560 int err;
5561
5562 err = nfs4_set_lock_state(state, fl);
5563 if (err != 0)
db4f2e63 5564 return err;
4a706fa0 5565 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5566 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5567}
6b3b5496 5568
cf470c3e
TM		 5569struct nfs_release_lockowner_data {
5570 struct nfs4_lock_state *lsp;
5ae67c4f 5571 struct nfs_server *server;
cf470c3e
TM		 5572 struct nfs_release_lockowner_args args;
5573};
5574
d3c7b7cc
TM		 5575static void nfs4_release_lockowner_release(void *calldata)
5576{
cf470c3e 5577 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5578 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5579 kfree(calldata);
5580}
5581
17280175 5582static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5583 .rpc_release = nfs4_release_lockowner_release,
5584};
5585
c8b2d0bf 5586static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5587{
cf470c3e 5588 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5589 struct rpc_message msg = {
5590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5591 };
5592
5593 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5594 return -EINVAL;
5595 data = kmalloc(sizeof(*data), GFP_NOFS);
5596 if (!data)
5597 return -ENOMEM;
5598 data->lsp = lsp;
5ae67c4f 5599 data->server = server;
cf470c3e
TM		 5600 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5601 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5602 data->args.lock_owner.s_dev = server->s_dev;
5603 msg.rpc_argp = &data->args;
5604 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5605 return 0;
d3c7b7cc
TM		 5606}
5607
aa1870af
BF		 5608#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5609
64c2ce8b
AK		 5610static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5611 const void *buf, size_t buflen,
5612 int flags, int type)
6b3b5496 5613{
64c2ce8b
AK		 5614 if (strcmp(key, "") != 0)
5615 return -EINVAL;
4b580ee3 5616
64c2ce8b 5617 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5618}
5619
64c2ce8b
AK		 5620static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5621 void *buf, size_t buflen, int type)
6b3b5496 5622{
64c2ce8b
AK		 5623 if (strcmp(key, "") != 0)
5624 return -EINVAL;
aa1870af 5625
64c2ce8b 5626 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5627}
5628
64c2ce8b
AK		 5629static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5630 size_t list_len, const char *name,
5631 size_t name_len, int type)
6b3b5496 5632{
64c2ce8b 5633 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5634
096455a2
BF		 5635 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5636 return 0;
64c2ce8b
AK		 5637
5638 if (list && len <= list_len)
5639 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5640 return len;
6b3b5496
BF		 5641}
5642
c9bccef6
DQ		 5643#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5644static inline int nfs4_server_supports_labels(struct nfs_server *server)
5645{
5646 return server->caps & NFS_CAP_SECURITY_LABEL;
5647}
5648
5649static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5650 const void *buf, size_t buflen,
5651 int flags, int type)
5652{
5653 if (security_ismaclabel(key))
5654 return nfs4_set_security_label(dentry, buf, buflen);
5655
5656 return -EOPNOTSUPP;
5657}
5658
5659static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5660 void *buf, size_t buflen, int type)
5661{
5662 if (security_ismaclabel(key))
5663 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5664 return -EOPNOTSUPP;
5665}
5666
5667static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5668 size_t list_len, const char *name,
5669 size_t name_len, int type)
5670{
5671 size_t len = 0;
5672
5673 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5674 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5675 if (list && len <= list_len)
5676 security_inode_listsecurity(dentry->d_inode, list, len);
5677 }
5678 return len;
5679}
5680
5681static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5682 .prefix = XATTR_SECURITY_PREFIX,
5683 .list = nfs4_xattr_list_nfs4_label,
5684 .get = nfs4_xattr_get_nfs4_label,
5685 .set = nfs4_xattr_set_nfs4_label,
5686};
5687#endif
5688
5689
533eb461
AA		 5690/*
5691 * nfs_fhget will use either the mounted_on_fileid or the fileid
5692 */
69aaaae1
TM		 5693static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5694{
533eb461
AA		 5695 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5696 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5697 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5698 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5699 return;
5700
5701 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5702 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5703 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5704 fattr->nlink = 2;
5705}
5706
f05d147f
BS		 5707static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5708 const struct qstr *name,
5709 struct nfs4_fs_locations *fs_locations,
5710 struct page *page)
683b57b4
TM		 5711{
5712 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5713 u32 bitmask[3] = {
361e624f 5714 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5715 };
5716 struct nfs4_fs_locations_arg args = {
5717 .dir_fh = NFS_FH(dir),
c228fd3a 5718 .name = name,
683b57b4
TM		 5719 .page = page,
5720 .bitmask = bitmask,
5721 };
22958463
BH		 5722 struct nfs4_fs_locations_res res = {
5723 .fs_locations = fs_locations,
5724 };
683b57b4
TM		 5725 struct rpc_message msg = {
5726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5727 .rpc_argp = &args,
22958463 5728 .rpc_resp = &res,
683b57b4
TM		 5729 };
5730 int status;
5731
3110ff80 5732 dprintk("%s: start\n", __func__);
533eb461
AA		 5733
5734 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5735 * is not supported */
5736 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5737 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5738 else
5739 bitmask[0] |= FATTR4_WORD0_FILEID;
5740
c228fd3a 5741 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5742 fs_locations->server = server;
830b8e33 5743 fs_locations->nlocations = 0;
f05d147f 5744 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5745 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5746 return status;
5747}
5748
f05d147f
BS		 5749int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5750 const struct qstr *name,
5751 struct nfs4_fs_locations *fs_locations,
5752 struct page *page)
db0a9593
BS		 5753{
5754 struct nfs4_exception exception = { };
5755 int err;
5756 do {
5757 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5758 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5759 &exception);
5760 } while (exception.retry);
5761 return err;
5762}
5763
5a5ea0d4
BS		 5764static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5765{
5766 int status;
5767 struct nfs4_secinfo_arg args = {
5768 .dir_fh = NFS_FH(dir),
5769 .name = name,
5770 };
5771 struct nfs4_secinfo_res res = {
5772 .flavors = flavors,
5773 };
5774 struct rpc_message msg = {
5775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5776 .rpc_argp = &args,
5777 .rpc_resp = &res,
5778 };
5779
5780 dprintk("NFS call secinfo %s\n", name->name);
5781 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5782 dprintk("NFS reply secinfo: %d\n", status);
5783 return status;
5784}
5785
72de53ec
BS		 5786int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5787 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5788{
5789 struct nfs4_exception exception = { };
5790 int err;
5791 do {
5792 err = nfs4_handle_exception(NFS_SERVER(dir),
5793 _nfs4_proc_secinfo(dir, name, flavors),
5794 &exception);
5795 } while (exception.retry);
5796 return err;
5797}
5798
557134a3 5799#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5800/*
5801 * Check the exchange flags returned by the server for invalid flags, having
5802 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5803 * DS flags set.
5804 */
5805static int nfs4_check_cl_exchange_flags(u32 flags)
5806{
5807 if (flags & ~EXCHGID4_FLAG_MASK_R)
5808 goto out_inval;
5809 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5810 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5811 goto out_inval;
5812 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5813 goto out_inval;
5814 return NFS_OK;
5815out_inval:
5816 return -NFS4ERR_INVAL;
5817}
5818
78fe0f41 5819static bool
79d4e1f0
CL		 5820nfs41_same_server_scope(struct nfs41_server_scope *a,
5821 struct nfs41_server_scope *b)
78fe0f41
WAA		 5822{
5823 if (a->server_scope_sz == b->server_scope_sz &&
5824 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5825 return true;
5826
5827 return false;
5828}
5829
7c44f1ae
WAA		 5830/*
5831 * nfs4_proc_bind_conn_to_session()
5832 *
5833 * The 4.1 client currently uses the same TCP connection for the
5834 * fore and backchannel.
5835 */
2cf047c9 5836int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5837{
5838 int status;
5839 struct nfs41_bind_conn_to_session_res res;
5840 struct rpc_message msg = {
5841 .rpc_proc =
5842 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5843 .rpc_argp = clp,
5844 .rpc_resp = &res,
2cf047c9 5845 .rpc_cred = cred,
7c44f1ae
WAA		 5846 };
5847
5848 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5849
5850 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5851 if (unlikely(res.session == NULL)) {
5852 status = -ENOMEM;
5853 goto out;
5854 }
5855
5856 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5857 if (status == 0) {
5858 if (memcmp(res.session->sess_id.data,
5859 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5860 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5861 status = -EIO;
5862 goto out_session;
5863 }
5864 if (res.dir != NFS4_CDFS4_BOTH) {
5865 dprintk("NFS: %s: Unexpected direction from server\n",
5866 __func__);
5867 status = -EIO;
5868 goto out_session;
5869 }
5870 if (res.use_conn_in_rdma_mode) {
5871 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5872 __func__);
5873 status = -EIO;
5874 goto out_session;
5875 }
5876 }
5877out_session:
5878 kfree(res.session);
5879out:
5880 dprintk("<-- %s status= %d\n", __func__, status);
5881 return status;
5882}
5883
99fe60d0
BH		 5884/*
5885 * nfs4_proc_exchange_id()
5886 *
6bbb4ae8
CL		 5887 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5888 *
99fe60d0
BH		 5889 * Since the clientid has expired, all compounds using sessions
5890 * associated with the stale clientid will be returning
5891 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5892 * be in some phase of session reset.
5893 */
4d643d1d 5894int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5895{
5896 nfs4_verifier verifier;
5897 struct nfs41_exchange_id_args args = {
cd93710e 5898 .verifier = &verifier,
99fe60d0 5899 .client = clp,
357f54d6 5900 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5901 };
5902 struct nfs41_exchange_id_res res = {
32b01310 5903 0
99fe60d0
BH		 5904 };
5905 int status;
5906 struct rpc_message msg = {
5907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5908 .rpc_argp = &args,
5909 .rpc_resp = &res,
5910 .rpc_cred = cred,
5911 };
99fe60d0 5912
f092075d 5913 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5914 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5915 sizeof(args.id));
6bbb4ae8
CL		 5916 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5917 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5918 args.id_len, args.id);
99fe60d0 5919
acdeb69d 5920 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5921 GFP_NOFS);
acdeb69d 5922 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5923 status = -ENOMEM;
5924 goto out;
5925 }
78fe0f41 5926
79d4e1f0 5927 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5928 GFP_NOFS);
177313f1 5929 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5930 status = -ENOMEM;
acdeb69d 5931 goto out_server_owner;
abe9a6d5 5932 }
78fe0f41 5933
bbafffd2 5934 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5935 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5936 status = -ENOMEM;
5937 goto out_server_scope;
5938 }
5939
1bd714f2 5940 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5941 if (status == 0)
32b01310 5942 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5943
acdeb69d 5944 if (status == 0) {
32b01310
TM		 5945 clp->cl_clientid = res.clientid;
5946 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5947 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5948 clp->cl_seqid = res.seqid;
5949
acdeb69d
CL		 5950 kfree(clp->cl_serverowner);
5951 clp->cl_serverowner = res.server_owner;
5952 res.server_owner = NULL;
78fe0f41 5953
7d2ed9ac 5954 /* use the most recent implementation id */
59155546
CL		 5955 kfree(clp->cl_implid);
5956 clp->cl_implid = res.impl_id;
7d2ed9ac 5957
177313f1 5958 if (clp->cl_serverscope != NULL &&
79d4e1f0 5959 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5960 res.server_scope)) {
5961 dprintk("%s: server_scope mismatch detected\n",
5962 __func__);
5963 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5964 kfree(clp->cl_serverscope);
5965 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5966 }
5967
177313f1 5968 if (clp->cl_serverscope == NULL) {
79d4e1f0 5969 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5970 goto out;
5971 }
32b01310
TM		 5972 } else
5973 kfree(res.impl_id);
7d2ed9ac 5974
acdeb69d
CL		 5975out_server_owner:
5976 kfree(res.server_owner);
7d2ed9ac 5977out_server_scope:
abe9a6d5
WAA		 5978 kfree(res.server_scope);
5979out:
177313f1 5980 if (clp->cl_implid != NULL)
6bbb4ae8 5981 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5982 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5983 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5984 clp->cl_implid->date.seconds,
5985 clp->cl_implid->date.nseconds);
6bbb4ae8 5986 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5987 return status;
5988}
5989
66245539
TM		 5990static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5991 struct rpc_cred *cred)
5992{
5993 struct rpc_message msg = {
5994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5995 .rpc_argp = clp,
5996 .rpc_cred = cred,
5997 };
5998 int status;
5999
6000 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6001 if (status)
02c67525 6002 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6003 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6004 return status;
6005}
6006
6007static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6008 struct rpc_cred *cred)
6009{
6010 unsigned int loop;
6011 int ret;
6012
6013 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6014 ret = _nfs4_proc_destroy_clientid(clp, cred);
6015 switch (ret) {
6016 case -NFS4ERR_DELAY:
6017 case -NFS4ERR_CLIENTID_BUSY:
6018 ssleep(1);
6019 break;
6020 default:
6021 return ret;
6022 }
6023 }
6024 return 0;
6025}
6026
6027int nfs4_destroy_clientid(struct nfs_client *clp)
6028{
6029 struct rpc_cred *cred;
6030 int ret = 0;
6031
6032 if (clp->cl_mvops->minor_version < 1)
6033 goto out;
6034 if (clp->cl_exchange_flags == 0)
6035 goto out;
05f4c350
CL		 6036 if (clp->cl_preserve_clid)
6037 goto out;
66245539
TM		 6038 cred = nfs4_get_exchange_id_cred(clp);
6039 ret = nfs4_proc_destroy_clientid(clp, cred);
6040 if (cred)
6041 put_rpccred(cred);
6042 switch (ret) {
6043 case 0:
6044 case -NFS4ERR_STALE_CLIENTID:
6045 clp->cl_exchange_flags = 0;
6046 }
6047out:
6048 return ret;
6049}
6050
2050f0cc
AA		 6051struct nfs4_get_lease_time_data {
6052 struct nfs4_get_lease_time_args *args;
6053 struct nfs4_get_lease_time_res *res;
6054 struct nfs_client *clp;
6055};
6056
6057static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6058 void *calldata)
6059{
2050f0cc
AA		 6060 struct nfs4_get_lease_time_data *data =
6061 (struct nfs4_get_lease_time_data *)calldata;
6062
6063 dprintk("--> %s\n", __func__);
6064 /* just setup sequence, do not trigger session recovery
6065 since we're invoked within one */
d9afbd1b
TM		 6066 nfs41_setup_sequence(data->clp->cl_session,
6067 &data->args->la_seq_args,
6068 &data->res->lr_seq_res,
6069 task);
2050f0cc
AA		 6070 dprintk("<-- %s\n", __func__);
6071}
6072
6073/*
6074 * Called from nfs4_state_manager thread for session setup, so don't recover
6075 * from sequence operation or clientid errors.
6076 */
6077static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6078{
6079 struct nfs4_get_lease_time_data *data =
6080 (struct nfs4_get_lease_time_data *)calldata;
6081
6082 dprintk("--> %s\n", __func__);
14516c3a
TM		 6083 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6084 return;
2050f0cc
AA		 6085 switch (task->tk_status) {
6086 case -NFS4ERR_DELAY:
6087 case -NFS4ERR_GRACE:
6088 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6089 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6090 task->tk_status = 0;
a8a4ae3a
AA		 6091 /* fall through */
6092 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6093 rpc_restart_call_prepare(task);
2050f0cc
AA		 6094 return;
6095 }
2050f0cc
AA		 6096 dprintk("<-- %s\n", __func__);
6097}
6098
17280175 6099static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6100 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6101 .rpc_call_done = nfs4_get_lease_time_done,
6102};
6103
6104int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6105{
6106 struct rpc_task *task;
6107 struct nfs4_get_lease_time_args args;
6108 struct nfs4_get_lease_time_res res = {
6109 .lr_fsinfo = fsinfo,
6110 };
6111 struct nfs4_get_lease_time_data data = {
6112 .args = &args,
6113 .res = &res,
6114 .clp = clp,
6115 };
6116 struct rpc_message msg = {
6117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6118 .rpc_argp = &args,
6119 .rpc_resp = &res,
6120 };
6121 struct rpc_task_setup task_setup = {
6122 .rpc_client = clp->cl_rpcclient,
6123 .rpc_message = &msg,
6124 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6125 .callback_data = &data,
6126 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6127 };
6128 int status;
6129
9d12b216 6130 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6131 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6132 dprintk("--> %s\n", __func__);
6133 task = rpc_run_task(&task_setup);
6134
6135 if (IS_ERR(task))
6136 status = PTR_ERR(task);
6137 else {
6138 status = task->tk_status;
6139 rpc_put_task(task);
6140 }
6141 dprintk("<-- %s return %d\n", __func__, status);
6142
6143 return status;
6144}
6145
fc931582
AA		 6146/*
6147 * Initialize the values to be used by the client in CREATE_SESSION
6148 * If nfs4_init_session set the fore channel request and response sizes,
6149 * use them.
6150 *
6151 * Set the back channel max_resp_sz_cached to zero to force the client to
6152 * always set csa_cachethis to FALSE because the current implementation
6153 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6154 */
6155static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6156{
6157 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 6158 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
6159 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 6160
6161 if (mxrqst_sz == 0)
6162 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
6163 if (mxresp_sz == 0)
6164 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
6165 /* Fore channel attributes */
fc931582
AA		 6166 args->fc_attrs.max_rqst_sz = mxrqst_sz;
6167 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 6168 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6169 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6170
6171 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6172 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6173 __func__,
6174 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6175 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6176
6177 /* Back channel attributes */
fc931582
AA		 6178 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6179 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6180 args->bc_attrs.max_resp_sz_cached = 0;
6181 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6182 args->bc_attrs.max_reqs = 1;
6183
6184 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6185 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6186 __func__,
6187 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6188 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6189 args->bc_attrs.max_reqs);
6190}
6191
43c2e885 6192static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6193{
43c2e885
BF		 6194 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6195 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6196
43c2e885
BF		 6197 if (rcvd->max_resp_sz > sent->max_resp_sz)
6198 return -EINVAL;
6199 /*
6200 * Our requested max_ops is the minimum we need; we're not
6201 * prepared to break up compounds into smaller pieces than that.
6202 * So, no point even trying to continue if the server won't
6203 * cooperate:
6204 */
6205 if (rcvd->max_ops < sent->max_ops)
6206 return -EINVAL;
6207 if (rcvd->max_reqs == 0)
6208 return -EINVAL;
b4b9a0c1
VG		 6209 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6210 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6211 return 0;
8d35301d
AA		 6212}
6213
43c2e885
BF		 6214static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6215{
6216 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6217 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6218
43c2e885
BF		 6219 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6220 return -EINVAL;
6221 if (rcvd->max_resp_sz < sent->max_resp_sz)
6222 return -EINVAL;
6223 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6224 return -EINVAL;
6225 /* These would render the backchannel useless: */
b4b9a0c1 6226 if (rcvd->max_ops != sent->max_ops)
43c2e885 6227 return -EINVAL;
b4b9a0c1 6228 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6229 return -EINVAL;
6230 return 0;
6231}
8d35301d 6232
8d35301d
AA		 6233static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6234 struct nfs4_session *session)
6235{
43c2e885 6236 int ret;
8d35301d 6237
43c2e885
BF		 6238 ret = nfs4_verify_fore_channel_attrs(args, session);
6239 if (ret)
6240 return ret;
6241 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6242}
6243
848f5bda
TM		 6244static int _nfs4_proc_create_session(struct nfs_client *clp,
6245 struct rpc_cred *cred)
fc931582
AA		 6246{
6247 struct nfs4_session *session = clp->cl_session;
6248 struct nfs41_create_session_args args = {
6249 .client = clp,
6250 .cb_program = NFS4_CALLBACK,
6251 };
6252 struct nfs41_create_session_res res = {
6253 .client = clp,
6254 };
6255 struct rpc_message msg = {
6256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6257 .rpc_argp = &args,
6258 .rpc_resp = &res,
848f5bda 6259 .rpc_cred = cred,
fc931582
AA		 6260 };
6261 int status;
6262
6263 nfs4_init_channel_attrs(&args);
0f91421e 6264 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6265
1bd714f2 6266 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 6267
43095d39 6268 if (!status) {
8d35301d
AA		 6269 /* Verify the session's negotiated channel_attrs values */
6270 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6271 /* Increment the clientid slot sequence id */
6272 clp->cl_seqid++;
6273 }
6274
6275 return status;
6276}
6277
6278/*
6279 * Issues a CREATE_SESSION operation to the server.
6280 * It is the responsibility of the caller to verify the session is
6281 * expired before calling this routine.
6282 */
848f5bda 6283int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6284{
6285 int status;
6286 unsigned *ptr;
fc931582
AA		 6287 struct nfs4_session *session = clp->cl_session;
6288
6289 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6290
848f5bda 6291 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6292 if (status)
6293 goto out;
6294
aacd5537
AA		 6295 /* Init or reset the session slot tables */
6296 status = nfs4_setup_session_slot_tables(session);
6297 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6298 if (status)
6299 goto out;
6300
6301 ptr = (unsigned *)&session->sess_id.data[0];
6302 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6303 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6304out:
6305 dprintk("<-- %s\n", __func__);
6306 return status;
6307}
6308
0f3e66c6
AA		 6309/*
6310 * Issue the over-the-wire RPC DESTROY_SESSION.
6311 * The caller must serialize access to this routine.
6312 */
848f5bda
TM		 6313int nfs4_proc_destroy_session(struct nfs4_session *session,
6314 struct rpc_cred *cred)
0f3e66c6 6315{
848f5bda
TM		 6316 struct rpc_message msg = {
6317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6318 .rpc_argp = session,
6319 .rpc_cred = cred,
6320 };
0f3e66c6 6321 int status = 0;
0f3e66c6
AA		 6322
6323 dprintk("--> nfs4_proc_destroy_session\n");
6324
6325 /* session is still being setup */
6326 if (session->clp->cl_cons_state != NFS_CS_READY)
6327 return status;
6328
1bd714f2 6329 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 6330
6331 if (status)
08106ac7 6332 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6333 "Session has been destroyed regardless...\n", status);
6334
6335 dprintk("<-- nfs4_proc_destroy_session\n");
6336 return status;
6337}
6338
fc01cea9
AA		 6339/*
6340 * Renew the cl_session lease.
6341 */
d5f8d3fe
TM		 6342struct nfs4_sequence_data {
6343 struct nfs_client *clp;
6344 struct nfs4_sequence_args args;
6345 struct nfs4_sequence_res res;
6346};
6347
dc96aef9
AB		 6348static void nfs41_sequence_release(void *data)
6349{
d5f8d3fe
TM		 6350 struct nfs4_sequence_data *calldata = data;
6351 struct nfs_client *clp = calldata->clp;
dc96aef9 6352
7135840f
AB		 6353 if (atomic_read(&clp->cl_count) > 1)
6354 nfs4_schedule_state_renewal(clp);
6355 nfs_put_client(clp);
d5f8d3fe 6356 kfree(calldata);
dc96aef9
AB		 6357}
6358
aa5190d0
TM		 6359static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6360{
6361 switch(task->tk_status) {
6362 case -NFS4ERR_DELAY:
aa5190d0
TM		 6363 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6364 return -EAGAIN;
6365 default:
0400a6b0 6366 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6367 }
6368 return 0;
6369}
6370
dc96aef9 6371static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6372{
d5f8d3fe
TM		 6373 struct nfs4_sequence_data *calldata = data;
6374 struct nfs_client *clp = calldata->clp;
fc01cea9 6375
14516c3a
TM		 6376 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6377 return;
fc01cea9
AA		 6378
6379 if (task->tk_status < 0) {
6380 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6381 if (atomic_read(&clp->cl_count) == 1)
6382 goto out;
fc01cea9 6383
aa5190d0
TM		 6384 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6385 rpc_restart_call_prepare(task);
fc01cea9
AA		 6386 return;
6387 }
6388 }
fc01cea9 6389 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6390out:
fc01cea9
AA		 6391 dprintk("<-- %s\n", __func__);
6392}
6393
6394static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6395{
d5f8d3fe
TM		 6396 struct nfs4_sequence_data *calldata = data;
6397 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6398 struct nfs4_sequence_args *args;
6399 struct nfs4_sequence_res *res;
6400
fc01cea9
AA		 6401 args = task->tk_msg.rpc_argp;
6402 res = task->tk_msg.rpc_resp;
6403
d9afbd1b 6404 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6405}
6406
6407static const struct rpc_call_ops nfs41_sequence_ops = {
6408 .rpc_call_done = nfs41_sequence_call_done,
6409 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6410 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6411};
6412
8fe72bac
TM		 6413static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6414 struct rpc_cred *cred,
6415 bool is_privileged)
fc01cea9 6416{
d5f8d3fe 6417 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6418 struct rpc_message msg = {
6419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6420 .rpc_cred = cred,
6421 };
71ac6da9
TM		 6422 struct rpc_task_setup task_setup_data = {
6423 .rpc_client = clp->cl_rpcclient,
6424 .rpc_message = &msg,
8fe72bac 6425 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6426 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6427 };
fc01cea9 6428
7135840f 6429 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6430 return ERR_PTR(-EIO);
dfb4f309 6431 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6432 if (calldata == NULL) {
7135840f 6433 nfs_put_client(clp);
71ac6da9 6434 return ERR_PTR(-ENOMEM);
fc01cea9 6435 }
9d12b216 6436 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6437 if (is_privileged)
6438 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6439 msg.rpc_argp = &calldata->args;
6440 msg.rpc_resp = &calldata->res;
6441 calldata->clp = clp;
71ac6da9 6442 task_setup_data.callback_data = calldata;
fc01cea9 6443
71ac6da9
TM		 6444 return rpc_run_task(&task_setup_data);
6445}
6446
2f60ea6b 6447static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6448{
6449 struct rpc_task *task;
6450 int ret = 0;
6451
2f60ea6b
TM		 6452 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6453 return 0;
8fe72bac 6454 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6455 if (IS_ERR(task))
6456 ret = PTR_ERR(task);
6457 else
bf294b41 6458 rpc_put_task_async(task);
71ac6da9
TM		 6459 dprintk("<-- %s status=%d\n", __func__, ret);
6460 return ret;
6461}
6462
6463static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6464{
6465 struct rpc_task *task;
6466 int ret;
6467
8fe72bac 6468 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6469 if (IS_ERR(task)) {
6470 ret = PTR_ERR(task);
6471 goto out;
6472 }
6473 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6474 if (!ret) {
6475 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6476
6477 if (task->tk_status == 0)
6478 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6479 ret = task->tk_status;
b4410c2f 6480 }
71ac6da9
TM		 6481 rpc_put_task(task);
6482out:
6483 dprintk("<-- %s status=%d\n", __func__, ret);
6484 return ret;
fc01cea9
AA		 6485}
6486
fce5c838
RL		 6487struct nfs4_reclaim_complete_data {
6488 struct nfs_client *clp;
6489 struct nfs41_reclaim_complete_args arg;
6490 struct nfs41_reclaim_complete_res res;
6491};
6492
6493static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6494{
6495 struct nfs4_reclaim_complete_data *calldata = data;
6496
d9afbd1b
TM		 6497 nfs41_setup_sequence(calldata->clp->cl_session,
6498 &calldata->arg.seq_args,
6499 &calldata->res.seq_res,
6500 task);
fce5c838
RL		 6501}
6502
aa5190d0
TM		 6503static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6504{
6505 switch(task->tk_status) {
6506 case 0:
6507 case -NFS4ERR_COMPLETE_ALREADY:
6508 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6509 break;
6510 case -NFS4ERR_DELAY:
aa5190d0 6511 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6512 /* fall through */
6513 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6514 return -EAGAIN;
6515 default:
0400a6b0 6516 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6517 }
6518 return 0;
6519}
6520
fce5c838
RL		 6521static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6522{
6523 struct nfs4_reclaim_complete_data *calldata = data;
6524 struct nfs_client *clp = calldata->clp;
6525 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6526
6527 dprintk("--> %s\n", __func__);
14516c3a
TM		 6528 if (!nfs41_sequence_done(task, res))
6529 return;
fce5c838 6530
aa5190d0
TM		 6531 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6532 rpc_restart_call_prepare(task);
6533 return;
6534 }
fce5c838
RL		 6535 dprintk("<-- %s\n", __func__);
6536}
6537
6538static void nfs4_free_reclaim_complete_data(void *data)
6539{
6540 struct nfs4_reclaim_complete_data *calldata = data;
6541
6542 kfree(calldata);
6543}
6544
6545static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6546 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6547 .rpc_call_done = nfs4_reclaim_complete_done,
6548 .rpc_release = nfs4_free_reclaim_complete_data,
6549};
6550
6551/*
6552 * Issue a global reclaim complete.
6553 */
6554static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6555{
6556 struct nfs4_reclaim_complete_data *calldata;
6557 struct rpc_task *task;
6558 struct rpc_message msg = {
6559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6560 };
6561 struct rpc_task_setup task_setup_data = {
6562 .rpc_client = clp->cl_rpcclient,
6563 .rpc_message = &msg,
6564 .callback_ops = &nfs4_reclaim_complete_call_ops,
6565 .flags = RPC_TASK_ASYNC,
6566 };
6567 int status = -ENOMEM;
6568
6569 dprintk("--> %s\n", __func__);
8535b2be 6570 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6571 if (calldata == NULL)
6572 goto out;
6573 calldata->clp = clp;
6574 calldata->arg.one_fs = 0;
fce5c838 6575
9d12b216 6576 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6577 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6578 msg.rpc_argp = &calldata->arg;
6579 msg.rpc_resp = &calldata->res;
6580 task_setup_data.callback_data = calldata;
6581 task = rpc_run_task(&task_setup_data);
acf82b85 6582 if (IS_ERR(task)) {
fce5c838 6583 status = PTR_ERR(task);
acf82b85
DC		 6584 goto out;
6585 }
c34c32ea
AA		 6586 status = nfs4_wait_for_completion_rpc_task(task);
6587 if (status == 0)
6588 status = task->tk_status;
fce5c838 6589 rpc_put_task(task);
acf82b85 6590 return 0;
fce5c838
RL		 6591out:
6592 dprintk("<-- %s status=%d\n", __func__, status);
6593 return status;
6594}
b1f69b75
AA		 6595
6596static void
6597nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6598{
6599 struct nfs4_layoutget *lgp = calldata;
c31663d4 6600 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6601 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6602
6603 dprintk("--> %s\n", __func__);
c31663d4
FI		 6604 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6605 * right now covering the LAYOUTGET we are about to send.
6606 * However, that is not so catastrophic, and there seems
6607 * to be no way to prevent it completely.
6608 */
6ba7db34 6609 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6610 &lgp->res.seq_res, task))
b1f69b75 6611 return;
cf7d63f1
FI		 6612 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6613 NFS_I(lgp->args.inode)->layout,
6614 lgp->args.ctx->state)) {
6615 rpc_exit(task, NFS4_OK);
cf7d63f1 6616 }
b1f69b75
AA		 6617}
6618
6619static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6620{
6621 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6622 struct inode *inode = lgp->args.inode;
6623 struct nfs_server *server = NFS_SERVER(inode);
6624 struct pnfs_layout_hdr *lo;
6625 struct nfs4_state *state = NULL;
30005121 6626 unsigned long timeo, giveup;
b1f69b75
AA		 6627
6628 dprintk("--> %s\n", __func__);
6629
6ba7db34 6630 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6631 goto out;
b1f69b75
AA		 6632
6633 switch (task->tk_status) {
6634 case 0:
ee314c2a 6635 goto out;
b1f69b75
AA		 6636 case -NFS4ERR_LAYOUTTRYLATER:
6637 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6638 timeo = rpc_get_timeout(task->tk_client);
6639 giveup = lgp->args.timestamp + timeo;
6640 if (time_after(giveup, jiffies))
6641 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6642 break;
6643 case -NFS4ERR_EXPIRED:
6644 case -NFS4ERR_BAD_STATEID:
6645 spin_lock(&inode->i_lock);
6646 lo = NFS_I(inode)->layout;
6647 if (!lo || list_empty(&lo->plh_segs)) {
6648 spin_unlock(&inode->i_lock);
6649 /* If the open stateid was bad, then recover it. */
6650 state = lgp->args.ctx->state;
6651 } else {
6652 LIST_HEAD(head);
6653
6654 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6655 spin_unlock(&inode->i_lock);
6656 /* Mark the bad layout state as invalid, then
6657 * retry using the open stateid. */
6658 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6659 }
6660 }
ee314c2a
TM		 6661 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6662 rpc_restart_call_prepare(task);
6663out:
b1f69b75
AA		 6664 dprintk("<-- %s\n", __func__);
6665}
6666
8554116e
IK		 6667static size_t max_response_pages(struct nfs_server *server)
6668{
6669 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6670 return nfs_page_array_len(0, max_resp_sz);
6671}
6672
6673static void nfs4_free_pages(struct page **pages, size_t size)
6674{
6675 int i;
6676
6677 if (!pages)
6678 return;
6679
6680 for (i = 0; i < size; i++) {
6681 if (!pages[i])
6682 break;
6683 __free_page(pages[i]);
6684 }
6685 kfree(pages);
6686}
6687
6688static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6689{
6690 struct page **pages;
6691 int i;
6692
6693 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6694 if (!pages) {
6695 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6696 return NULL;
6697 }
6698
6699 for (i = 0; i < size; i++) {
6700 pages[i] = alloc_page(gfp_flags);
6701 if (!pages[i]) {
6702 dprintk("%s: failed to allocate page\n", __func__);
6703 nfs4_free_pages(pages, size);
6704 return NULL;
6705 }
6706 }
6707
6708 return pages;
6709}
6710
b1f69b75
AA		 6711static void nfs4_layoutget_release(void *calldata)
6712{
6713 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6714 struct inode *inode = lgp->args.inode;
6715 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6716 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6717
6718 dprintk("--> %s\n", __func__);
8554116e 6719 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6720 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6721 put_nfs_open_context(lgp->args.ctx);
6722 kfree(calldata);
6723 dprintk("<-- %s\n", __func__);
6724}
6725
6726static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6727 .rpc_call_prepare = nfs4_layoutget_prepare,
6728 .rpc_call_done = nfs4_layoutget_done,
6729 .rpc_release = nfs4_layoutget_release,
6730};
6731
a0b0a6e3
TM		 6732struct pnfs_layout_segment *
6733nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6734{
a47970ff
WAA		 6735 struct inode *inode = lgp->args.inode;
6736 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6737 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6738 struct rpc_task *task;
6739 struct rpc_message msg = {
6740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6741 .rpc_argp = &lgp->args,
6742 .rpc_resp = &lgp->res,
6743 };
6744 struct rpc_task_setup task_setup_data = {
6745 .rpc_client = server->client,
6746 .rpc_message = &msg,
6747 .callback_ops = &nfs4_layoutget_call_ops,
6748 .callback_data = lgp,
6749 .flags = RPC_TASK_ASYNC,
6750 };
a0b0a6e3 6751 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6752 int status = 0;
6753
6754 dprintk("--> %s\n", __func__);
6755
8554116e
IK		 6756 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6757 if (!lgp->args.layout.pages) {
6758 nfs4_layoutget_release(lgp);
a0b0a6e3 6759 return ERR_PTR(-ENOMEM);
8554116e
IK		 6760 }
6761 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6762 lgp->args.timestamp = jiffies;
8554116e 6763
35124a09 6764 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6765 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6766 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6767
6768 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6769 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6770
b1f69b75
AA		 6771 task = rpc_run_task(&task_setup_data);
6772 if (IS_ERR(task))
a0b0a6e3 6773 return ERR_CAST(task);
b1f69b75 6774 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6775 if (status == 0)
6776 status = task->tk_status;
085b7a45
WAA		 6777 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6778 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6779 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6780 rpc_put_task(task);
6781 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6782 if (status)
6783 return ERR_PTR(status);
6784 return lseg;
b1f69b75
AA		 6785}
6786
cbe82603
BH		 6787static void
6788nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6789{
6790 struct nfs4_layoutreturn *lrp = calldata;
6791
6792 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6793 nfs41_setup_sequence(lrp->clp->cl_session,
6794 &lrp->args.seq_args,
6795 &lrp->res.seq_res,
6796 task);
cbe82603
BH		 6797}
6798
6799static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6800{
6801 struct nfs4_layoutreturn *lrp = calldata;
6802 struct nfs_server *server;
6803
6804 dprintk("--> %s\n", __func__);
6805
6ba7db34 6806 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6807 return;
6808
6809 server = NFS_SERVER(lrp->args.inode);
6810 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6811 rpc_restart_call_prepare(task);
cbe82603
BH		 6812 return;
6813 }
cbe82603
BH		 6814 dprintk("<-- %s\n", __func__);
6815}
6816
6817static void nfs4_layoutreturn_release(void *calldata)
6818{
6819 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6820 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6821
6822 dprintk("--> %s\n", __func__);
849b286f
TM		 6823 spin_lock(&lo->plh_inode->i_lock);
6824 if (lrp->res.lrs_present)
6825 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6826 lo->plh_block_lgets--;
6827 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6828 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6829 kfree(calldata);
6830 dprintk("<-- %s\n", __func__);
6831}
6832
6833static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6834 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6835 .rpc_call_done = nfs4_layoutreturn_done,
6836 .rpc_release = nfs4_layoutreturn_release,
6837};
6838
6839int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6840{
6841 struct rpc_task *task;
6842 struct rpc_message msg = {
6843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6844 .rpc_argp = &lrp->args,
6845 .rpc_resp = &lrp->res,
6846 };
6847 struct rpc_task_setup task_setup_data = {
6848 .rpc_client = lrp->clp->cl_rpcclient,
6849 .rpc_message = &msg,
6850 .callback_ops = &nfs4_layoutreturn_call_ops,
6851 .callback_data = lrp,
6852 };
6853 int status;
6854
6855 dprintk("--> %s\n", __func__);
9d12b216 6856 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6857 task = rpc_run_task(&task_setup_data);
6858 if (IS_ERR(task))
6859 return PTR_ERR(task);
6860 status = task->tk_status;
6861 dprintk("<-- %s status=%d\n", __func__, status);
6862 rpc_put_task(task);
6863 return status;
6864}
6865
7f11d8d3
AA		 6866/*
6867 * Retrieve the list of Data Server devices from the MDS.
6868 */
6869static int _nfs4_getdevicelist(struct nfs_server *server,
6870 const struct nfs_fh *fh,
6871 struct pnfs_devicelist *devlist)
6872{
6873 struct nfs4_getdevicelist_args args = {
6874 .fh = fh,
6875 .layoutclass = server->pnfs_curr_ld->id,
6876 };
6877 struct nfs4_getdevicelist_res res = {
6878 .devlist = devlist,
6879 };
6880 struct rpc_message msg = {
6881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6882 .rpc_argp = &args,
6883 .rpc_resp = &res,
6884 };
6885 int status;
6886
6887 dprintk("--> %s\n", __func__);
6888 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6889 &res.seq_res, 0);
6890 dprintk("<-- %s status=%d\n", __func__, status);
6891 return status;
6892}
6893
6894int nfs4_proc_getdevicelist(struct nfs_server *server,
6895 const struct nfs_fh *fh,
6896 struct pnfs_devicelist *devlist)
6897{
6898 struct nfs4_exception exception = { };
6899 int err;
6900
6901 do {
6902 err = nfs4_handle_exception(server,
6903 _nfs4_getdevicelist(server, fh, devlist),
6904 &exception);
6905 } while (exception.retry);
6906
6907 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6908 err, devlist->num_devs);
6909
6910 return err;
6911}
6912EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6913
b1f69b75
AA		 6914static int
6915_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6916{
6917 struct nfs4_getdeviceinfo_args args = {
6918 .pdev = pdev,
6919 };
6920 struct nfs4_getdeviceinfo_res res = {
6921 .pdev = pdev,
6922 };
6923 struct rpc_message msg = {
6924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6925 .rpc_argp = &args,
6926 .rpc_resp = &res,
6927 };
6928 int status;
6929
6930 dprintk("--> %s\n", __func__);
7c513058 6931 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6932 dprintk("<-- %s status=%d\n", __func__, status);
6933
6934 return status;
6935}
6936
6937int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6938{
6939 struct nfs4_exception exception = { };
6940 int err;
6941
6942 do {
6943 err = nfs4_handle_exception(server,
6944 _nfs4_proc_getdeviceinfo(server, pdev),
6945 &exception);
6946 } while (exception.retry);
6947 return err;
6948}
6949EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6950
863a3c6c
AA		 6951static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6952{
6953 struct nfs4_layoutcommit_data *data = calldata;
6954 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6955 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6956
d9afbd1b
TM		 6957 nfs41_setup_sequence(session,
6958 &data->args.seq_args,
6959 &data->res.seq_res,
6960 task);
863a3c6c
AA		 6961}
6962
6963static void
6964nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6965{
6966 struct nfs4_layoutcommit_data *data = calldata;
6967 struct nfs_server *server = NFS_SERVER(data->args.inode);
6968
6ba7db34 6969 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6970 return;
6971
6972 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6973 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6974 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6975 case -NFS4ERR_BADLAYOUT: /* no layout */
6976 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6977 task->tk_status = 0;
e59d27e0
TM		 6978 break;
6979 case 0:
863a3c6c
AA		 6980 nfs_post_op_update_inode_force_wcc(data->args.inode,
6981 data->res.fattr);
e59d27e0
TM		 6982 break;
6983 default:
6984 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6985 rpc_restart_call_prepare(task);
6986 return;
6987 }
6988 }
863a3c6c
AA		 6989}
6990
6991static void nfs4_layoutcommit_release(void *calldata)
6992{
6993 struct nfs4_layoutcommit_data *data = calldata;
6994
db29c089 6995 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6996 put_rpccred(data->cred);
6997 kfree(data);
6998}
6999
7000static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7001 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7002 .rpc_call_done = nfs4_layoutcommit_done,
7003 .rpc_release = nfs4_layoutcommit_release,
7004};
7005
7006int
ef311537 7007nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7008{
7009 struct rpc_message msg = {
7010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7011 .rpc_argp = &data->args,
7012 .rpc_resp = &data->res,
7013 .rpc_cred = data->cred,
7014 };
7015 struct rpc_task_setup task_setup_data = {
7016 .task = &data->task,
7017 .rpc_client = NFS_CLIENT(data->args.inode),
7018 .rpc_message = &msg,
7019 .callback_ops = &nfs4_layoutcommit_ops,
7020 .callback_data = data,
7021 .flags = RPC_TASK_ASYNC,
7022 };
7023 struct rpc_task *task;
7024 int status = 0;
7025
7026 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7027 "lbw: %llu inode %lu\n",
7028 data->task.tk_pid, sync,
7029 data->args.lastbytewritten,
7030 data->args.inode->i_ino);
7031
9d12b216 7032 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7033 task = rpc_run_task(&task_setup_data);
7034 if (IS_ERR(task))
7035 return PTR_ERR(task);
ef311537 7036 if (sync == false)
863a3c6c
AA		 7037 goto out;
7038 status = nfs4_wait_for_completion_rpc_task(task);
7039 if (status != 0)
7040 goto out;
7041 status = task->tk_status;
7042out:
7043 dprintk("%s: status %d\n", __func__, status);
7044 rpc_put_task(task);
7045 return status;
7046}
fca78d6d
BS		 7047
7048static int
7049_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7050 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7051{
7052 struct nfs41_secinfo_no_name_args args = {
7053 .style = SECINFO_STYLE_CURRENT_FH,
7054 };
7055 struct nfs4_secinfo_res res = {
7056 .flavors = flavors,
7057 };
7058 struct rpc_message msg = {
7059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7060 .rpc_argp = &args,
7061 .rpc_resp = &res,
7062 };
7063 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
7064}
7065
7066static int
7067nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7068 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7069{
7070 struct nfs4_exception exception = { };
7071 int err;
7072 do {
7073 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7074 switch (err) {
7075 case 0:
7076 case -NFS4ERR_WRONGSEC:
7077 case -NFS4ERR_NOTSUPP:
05e9cfb4 7078 goto out;
fca78d6d
BS		 7079 default:
7080 err = nfs4_handle_exception(server, err, &exception);
7081 }
7082 } while (exception.retry);
05e9cfb4 7083out:
fca78d6d
BS		 7084 return err;
7085}
7086
7087static int
7088nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7089 struct nfs_fsinfo *info)
7090{
7091 int err;
7092 struct page *page;
7093 rpc_authflavor_t flavor;
7094 struct nfs4_secinfo_flavors *flavors;
7095
7096 page = alloc_page(GFP_KERNEL);
7097 if (!page) {
7098 err = -ENOMEM;
7099 goto out;
7100 }
7101
7102 flavors = page_address(page);
7103 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7104
7105 /*
7106 * Fall back on "guess and check" method if
7107 * the server doesn't support SECINFO_NO_NAME
7108 */
7109 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7110 err = nfs4_find_root_sec(server, fhandle, info);
7111 goto out_freepage;
7112 }
7113 if (err)
7114 goto out_freepage;
7115
7116 flavor = nfs_find_best_sec(flavors);
7117 if (err == 0)
7118 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7119
7120out_freepage:
7121 put_page(page);
7122 if (err == -EACCES)
7123 return -EPERM;
7124out:
7125 return err;
7126}
1cab0652
BS		 7127
7128static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 7129{
7130 int status;
7131 struct nfs41_test_stateid_args args = {
1cab0652 7132 .stateid = stateid,
7d974794
BS		 7133 };
7134 struct nfs41_test_stateid_res res;
7135 struct rpc_message msg = {
7136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7137 .rpc_argp = &args,
7138 .rpc_resp = &res,
7139 };
1cab0652 7140
38527b15 7141 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7142 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7143 nfs4_set_sequence_privileged(&args.seq_args);
7144 status = nfs4_call_sync_sequence(server->client, server, &msg,
7145 &args.seq_args, &res.seq_res);
38527b15
CL		 7146 if (status != NFS_OK) {
7147 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7148 return status;
38527b15
CL		 7149 }
7150 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7151 return -res.status;
7d974794
BS		 7152}
7153
38527b15
CL		 7154/**
7155 * nfs41_test_stateid - perform a TEST_STATEID operation
7156 *
7157 * @server: server / transport on which to perform the operation
7158 * @stateid: state ID to test
7159 *
7160 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7161 * Otherwise a negative NFS4ERR value is returned if the operation
7162 * failed or the state ID is not currently valid.
7163 */
1cab0652 7164static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 7165{
7166 struct nfs4_exception exception = { };
7167 int err;
7168 do {
377e507d
CL		 7169 err = _nfs41_test_stateid(server, stateid);
7170 if (err != -NFS4ERR_DELAY)
7171 break;
7172 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7173 } while (exception.retry);
7174 return err;
7175}
9aeda35f 7176
7c1d5fae
TM		 7177struct nfs_free_stateid_data {
7178 struct nfs_server *server;
7179 struct nfs41_free_stateid_args args;
9aeda35f 7180 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7181};
7182
7183static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7184{
7185 struct nfs_free_stateid_data *data = calldata;
7186 nfs41_setup_sequence(nfs4_get_session(data->server),
7187 &data->args.seq_args,
7188 &data->res.seq_res,
7189 task);
7190}
7191
7192static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7193{
7194 struct nfs_free_stateid_data *data = calldata;
7195
7196 nfs41_sequence_done(task, &data->res.seq_res);
7197
7198 switch (task->tk_status) {
7199 case -NFS4ERR_DELAY:
7200 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7201 rpc_restart_call_prepare(task);
7202 }
7203}
7204
7205static void nfs41_free_stateid_release(void *calldata)
7206{
7207 kfree(calldata);
7208}
7209
7210const struct rpc_call_ops nfs41_free_stateid_ops = {
7211 .rpc_call_prepare = nfs41_free_stateid_prepare,
7212 .rpc_call_done = nfs41_free_stateid_done,
7213 .rpc_release = nfs41_free_stateid_release,
7214};
7215
7216static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7217 nfs4_stateid *stateid,
7218 bool privileged)
7219{
9aeda35f
BS		 7220 struct rpc_message msg = {
7221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 7222 };
7c1d5fae
TM		 7223 struct rpc_task_setup task_setup = {
7224 .rpc_client = server->client,
7225 .rpc_message = &msg,
7226 .callback_ops = &nfs41_free_stateid_ops,
7227 .flags = RPC_TASK_ASYNC,
7228 };
7229 struct nfs_free_stateid_data *data;
9aeda35f 7230
38527b15 7231 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7232 data = kmalloc(sizeof(*data), GFP_NOFS);
7233 if (!data)
7234 return ERR_PTR(-ENOMEM);
7235 data->server = server;
7236 nfs4_stateid_copy(&data->args.stateid, stateid);
7237
7238 task_setup.callback_data = data;
7239
7240 msg.rpc_argp = &data->args;
7241 msg.rpc_resp = &data->res;
7242 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7243 if (privileged)
7244 nfs4_set_sequence_privileged(&data->args.seq_args);
7245
7246 return rpc_run_task(&task_setup);
9aeda35f
BS		 7247}
7248
38527b15
CL		 7249/**
7250 * nfs41_free_stateid - perform a FREE_STATEID operation
7251 *
7252 * @server: server / transport on which to perform the operation
7253 * @stateid: state ID to release
7254 *
7255 * Returns NFS_OK if the server freed "stateid". Otherwise a
7256 * negative NFS4ERR value is returned.
7257 */
1cab0652 7258static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 7259{
7c1d5fae
TM		 7260 struct rpc_task *task;
7261 int ret;
7262
7263 task = _nfs41_free_stateid(server, stateid, true);
7264 if (IS_ERR(task))
7265 return PTR_ERR(task);
7266 ret = rpc_wait_for_completion_task(task);
7267 if (!ret)
7268 ret = task->tk_status;
7269 rpc_put_task(task);
7270 return ret;
9aeda35f 7271}
36281caa 7272
c8b2d0bf
TM		 7273static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7274{
7275 struct rpc_task *task;
7276
7277 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
7278 nfs4_free_lock_state(server, lsp);
7279 if (IS_ERR(task))
7280 return PTR_ERR(task);
7281 rpc_put_task(task);
7282 return 0;
7283}
7284
36281caa
TM		 7285static bool nfs41_match_stateid(const nfs4_stateid *s1,
7286 const nfs4_stateid *s2)
7287{
2d2f24ad 7288 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7289 return false;
7290
2d2f24ad 7291 if (s1->seqid == s2->seqid)
36281caa 7292 return true;
2d2f24ad 7293 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7294 return true;
7295
7296 return false;
7297}
7298
557134a3
AA		 7299#endif /* CONFIG_NFS_V4_1 */
7300
36281caa
TM		 7301static bool nfs4_match_stateid(const nfs4_stateid *s1,
7302 const nfs4_stateid *s2)
7303{
f597c537 7304 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7305}
7306
7307
17280175 7308static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7309 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7310 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7311 .recover_open = nfs4_open_reclaim,
7312 .recover_lock = nfs4_lock_reclaim,
591d71cb 7313 .establish_clid = nfs4_init_clientid,
90a16617 7314 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 7315 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7316};
7317
591d71cb 7318#if defined(CONFIG_NFS_V4_1)
17280175 7319static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7320 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7321 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7322 .recover_open = nfs4_open_reclaim,
7323 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7324 .establish_clid = nfs41_init_clientid,
b4b82607 7325 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 7326 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7327 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7328};
7329#endif /* CONFIG_NFS_V4_1 */
7330
17280175 7331static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7332 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7333 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7334 .recover_open = nfs4_open_expired,
7335 .recover_lock = nfs4_lock_expired,
7336 .establish_clid = nfs4_init_clientid,
90a16617 7337 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 7338};
7339
7340#if defined(CONFIG_NFS_V4_1)
17280175 7341static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7342 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7343 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7344 .recover_open = nfs41_open_expired,
7345 .recover_lock = nfs41_lock_expired,
4d643d1d 7346 .establish_clid = nfs41_init_clientid,
b4b82607 7347 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7348};
591d71cb 7349#endif /* CONFIG_NFS_V4_1 */
1da177e4 7350
17280175 7351static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7352 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7353 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7354 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7355};
7356
7357#if defined(CONFIG_NFS_V4_1)
17280175 7358static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7359 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7360 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7361 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7362};
7363#endif
7364
97dc1359
TM		 7365static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7366 .minor_version = 0,
39c6daae
TM		 7367 .init_caps = NFS_CAP_READDIRPLUS
7368 | NFS_CAP_ATOMIC_OPEN
7369 | NFS_CAP_CHANGE_ATTR
7370 | NFS_CAP_POSIX_LOCK,
97dc1359 7371 .call_sync = _nfs4_call_sync,
36281caa 7372 .match_stateid = nfs4_match_stateid,
fca78d6d 7373 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7374 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7375 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7376 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7377 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7378};
7379
7380#if defined(CONFIG_NFS_V4_1)
7381static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7382 .minor_version = 1,
39c6daae
TM		 7383 .init_caps = NFS_CAP_READDIRPLUS
7384 | NFS_CAP_ATOMIC_OPEN
7385 | NFS_CAP_CHANGE_ATTR
3b66486c 7386 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7387 | NFS_CAP_STATEID_NFSV41
7388 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7389 .call_sync = nfs4_call_sync_sequence,
36281caa 7390 .match_stateid = nfs41_match_stateid,
fca78d6d 7391 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7392 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7393 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7394 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7395 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7396};
7397#endif
7398
42c2c424
SD		 7399#if defined(CONFIG_NFS_V4_2)
7400static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7401 .minor_version = 2,
7402 .call_sync = nfs4_call_sync_sequence,
7403 .match_stateid = nfs41_match_stateid,
7404 .find_root_sec = nfs41_find_root_sec,
7405 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7406 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7407 .state_renewal_ops = &nfs41_state_renewal_ops,
7408};
7409#endif
7410
97dc1359
TM		 7411const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7412 [0] = &nfs_v4_0_minor_ops,
7413#if defined(CONFIG_NFS_V4_1)
7414 [1] = &nfs_v4_1_minor_ops,
7415#endif
42c2c424
SD		 7416#if defined(CONFIG_NFS_V4_2)
7417 [2] = &nfs_v4_2_minor_ops,
7418#endif
97dc1359
TM		 7419};
7420
73a79706
BS		 7421const struct inode_operations nfs4_dir_inode_operations = {
7422 .create = nfs_create,
7423 .lookup = nfs_lookup,
7424 .atomic_open = nfs_atomic_open,
7425 .link = nfs_link,
7426 .unlink = nfs_unlink,
7427 .symlink = nfs_symlink,
7428 .mkdir = nfs_mkdir,
7429 .rmdir = nfs_rmdir,
7430 .mknod = nfs_mknod,
7431 .rename = nfs_rename,
7432 .permission = nfs_permission,
7433 .getattr = nfs_getattr,
7434 .setattr = nfs_setattr,
7435 .getxattr = generic_getxattr,
7436 .setxattr = generic_setxattr,
7437 .listxattr = generic_listxattr,
7438 .removexattr = generic_removexattr,
7439};
7440
92e1d5be 7441static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7442 .permission = nfs_permission,
7443 .getattr = nfs_getattr,
7444 .setattr = nfs_setattr,
64c2ce8b
AK		 7445 .getxattr = generic_getxattr,
7446 .setxattr = generic_setxattr,
7447 .listxattr = generic_listxattr,
7448 .removexattr = generic_removexattr,
6b3b5496
BF		 7449};
7450
509de811 7451const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7452 .version = 4, /* protocol version */
7453 .dentry_ops = &nfs4_dentry_operations,
7454 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7455 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7456 .file_ops = &nfs4_file_operations,
1da177e4 7457 .getroot = nfs4_proc_get_root,
281cad46 7458 .submount = nfs4_submount,
ff9099f2 7459 .try_mount = nfs4_try_mount,
1da177e4
LT		 7460 .getattr = nfs4_proc_getattr,
7461 .setattr = nfs4_proc_setattr,
7462 .lookup = nfs4_proc_lookup,
7463 .access = nfs4_proc_access,
7464 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7465 .create = nfs4_proc_create,
7466 .remove = nfs4_proc_remove,
7467 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7468 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7469 .unlink_done = nfs4_proc_unlink_done,
7470 .rename = nfs4_proc_rename,
d3d4152a 7471 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7472 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7473 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7474 .link = nfs4_proc_link,
7475 .symlink = nfs4_proc_symlink,
7476 .mkdir = nfs4_proc_mkdir,
7477 .rmdir = nfs4_proc_remove,
7478 .readdir = nfs4_proc_readdir,
7479 .mknod = nfs4_proc_mknod,
7480 .statfs = nfs4_proc_statfs,
7481 .fsinfo = nfs4_proc_fsinfo,
7482 .pathconf = nfs4_proc_pathconf,
e9326dca 7483 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7484 .decode_dirent = nfs4_decode_dirent,
7485 .read_setup = nfs4_proc_read_setup,
1abb5088 7486 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7487 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7488 .read_done = nfs4_read_done,
1da177e4 7489 .write_setup = nfs4_proc_write_setup,
57208fa7 7490 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7491 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7492 .write_done = nfs4_write_done,
1da177e4 7493 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7494 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7495 .commit_done = nfs4_commit_done,
1da177e4 7496 .lock = nfs4_proc_lock,
e50a1c2e 7497 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7498 .close_context = nfs4_close_context,
2b484297 7499 .open_context = nfs4_atomic_open,
011e2a7f 7500 .have_delegation = nfs4_have_delegation,
57ec14c5 7501 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7502 .alloc_client = nfs4_alloc_client,
45a52a02 7503 .init_client = nfs4_init_client,
cdb7eced 7504 .free_client = nfs4_free_client,
1179acc6
BS		 7505 .create_server = nfs4_create_server,
7506 .clone_server = nfs_clone_server,
1da177e4
LT		 7507};
7508
64c2ce8b
AK		 7509static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7510 .prefix = XATTR_NAME_NFSV4_ACL,
7511 .list = nfs4_xattr_list_nfs4_acl,
7512 .get = nfs4_xattr_get_nfs4_acl,
7513 .set = nfs4_xattr_set_nfs4_acl,
7514};
7515
7516const struct xattr_handler *nfs4_xattr_handlers[] = {
7517 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7518#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7519 &nfs4_xattr_nfs4_label_handler,
7520#endif
64c2ce8b
AK		 7521 NULL
7522};
7523
1da177e4
LT		 7524/*
7525 * Local variables:
7526 * c-basic-offset: 8
7527 * End:
7528 */
Linux 6.x block layer and io_uring tree(s)