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NFSv4: Add tracepoints for debugging state management problems
[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 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315
BS		 154 case -NFS4ERR_WRONGSEC:
155 return -EPERM;
3ddeb7c5
TM		 156 case -NFS4ERR_BADOWNER:
157 case -NFS4ERR_BADNAME:
158 return -EINVAL;
fb13bfa7
TM		 159 case -NFS4ERR_SHARE_DENIED:
160 return -EACCES;
f25efd85
SD		 161 case -NFS4ERR_MINOR_VERS_MISMATCH:
162 return -EPROTONOSUPPORT;
6168f62c
WAA		 163 case -NFS4ERR_ACCESS:
164 return -EACCES;
6e3cf241
TM		 165 case -NFS4ERR_FILE_OPEN:
166 return -EBUSY;
52567b03 167 default:
1da177e4 168 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 169 __func__, -err);
52567b03 170 break;
1da177e4 171 }
52567b03 172 return -EIO;
1da177e4
LT		 173}
174
175/*
176 * This is our standard bitmap for GETATTR requests.
177 */
1549210f 178const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 179 FATTR4_WORD0_TYPE
180 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_SIZE
182 | FATTR4_WORD0_FSID
183 | FATTR4_WORD0_FILEID,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 192 | FATTR4_WORD1_TIME_MODIFY,
193#ifdef CONFIG_NFS_V4_SECURITY_LABEL
194 FATTR4_WORD2_SECURITY_LABEL
195#endif
1da177e4
LT		 196};
197
1549210f
TM		 198static const u32 nfs4_pnfs_open_bitmap[3] = {
199 FATTR4_WORD0_TYPE
200 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_SIZE
202 | FATTR4_WORD0_FSID
203 | FATTR4_WORD0_FILEID,
204 FATTR4_WORD1_MODE
205 | FATTR4_WORD1_NUMLINKS
206 | FATTR4_WORD1_OWNER
207 | FATTR4_WORD1_OWNER_GROUP
208 | FATTR4_WORD1_RAWDEV
209 | FATTR4_WORD1_SPACE_USED
210 | FATTR4_WORD1_TIME_ACCESS
211 | FATTR4_WORD1_TIME_METADATA
212 | FATTR4_WORD1_TIME_MODIFY,
213 FATTR4_WORD2_MDSTHRESHOLD
214};
215
e23008ec
AA		 216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
a09df2ca 222const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
a09df2ca 231const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
dae100c2 237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
55b6e774 241 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 244};
245
a09df2ca 246const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 247 FATTR4_WORD0_TYPE
248 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_SIZE
250 | FATTR4_WORD0_FSID
251 | FATTR4_WORD0_FILEID
252 | FATTR4_WORD0_FS_LOCATIONS,
253 FATTR4_WORD1_MODE
254 | FATTR4_WORD1_NUMLINKS
255 | FATTR4_WORD1_OWNER
256 | FATTR4_WORD1_OWNER_GROUP
257 | FATTR4_WORD1_RAWDEV
258 | FATTR4_WORD1_SPACE_USED
259 | FATTR4_WORD1_TIME_ACCESS
260 | FATTR4_WORD1_TIME_METADATA
261 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 262 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 263};
264
bc4785cd 265static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 266 struct nfs4_readdir_arg *readdir)
267{
0dbb4c67 268 __be32 *start, *p;
1da177e4 269
1da177e4 270 if (cookie > 2) {
b7ef1956 271 readdir->cookie = cookie;
1da177e4
LT		 272 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
273 return;
274 }
275
276 readdir->cookie = 0;
277 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
278 if (cookie == 2)
279 return;
280
281 /*
282 * NFSv4 servers do not return entries for '.' and '..'
283 * Therefore, we fake these entries here. We let '.'
284 * have cookie 0 and '..' have cookie 1. Note that
285 * when talking to the server, we always send cookie 0
286 * instead of 1 or 2.
287 */
2b86ce2d 288 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 289
290 if (cookie == 0) {
291 *p++ = xdr_one; /* next */
292 *p++ = xdr_zero; /* cookie, first word */
293 *p++ = xdr_one; /* cookie, second word */
294 *p++ = xdr_one; /* entry len */
295 memcpy(p, ".\0\0\0", 4); /* entry */
296 p++;
297 *p++ = xdr_one; /* bitmap length */
298 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
299 *p++ = htonl(8); /* attribute buffer length */
4e769b93 300 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 301 }
302
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_two; /* cookie, second word */
306 *p++ = xdr_two; /* entry len */
307 memcpy(p, "..\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
4e769b93 312 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 313
314 readdir->pgbase = (char *)p - (char *)start;
315 readdir->count -= readdir->pgbase;
2b86ce2d 316 kunmap_atomic(start);
1da177e4
LT		 317}
318
65de872e
TM		 319static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
320{
321 int res = 0;
322
323 might_sleep();
324
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 329 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 330 if (fatal_signal_pending(current))
331 res = -ERESTARTSYS;
332 *timeout <<= 1;
333 return res;
334}
335
336/* This is the error handling routine for processes that are allowed
337 * to sleep.
338 */
b064eca2 339static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 340{
341 struct nfs_client *clp = server->nfs_client;
9e33bed5 342 struct nfs4_state *state = exception->state;
3114ea7a 343 struct inode *inode = exception->inode;
65de872e
TM		 344 int ret = errorcode;
345
346 exception->retry = 0;
347 switch(errorcode) {
348 case 0:
349 return 0;
3114ea7a 350 case -NFS4ERR_OPENMODE:
011e2a7f 351 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 352 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 353 exception->retry = 1;
354 return 0;
355 }
356 if (state == NULL)
357 break;
5d422301
TM		 358 ret = nfs4_schedule_stateid_recovery(server, state);
359 if (ret < 0)
360 break;
3114ea7a 361 goto wait_on_recovery;
a1d0b5ee 362 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 365 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
366 nfs_remove_bad_delegation(inode);
367 exception->retry = 1;
368 break;
369 }
9e33bed5
TM		 370 if (state == NULL)
371 break;
5d422301
TM		 372 ret = nfs4_schedule_stateid_recovery(server, state);
373 if (ret < 0)
374 break;
0400a6b0 375 goto wait_on_recovery;
0ced63d1 376 case -NFS4ERR_EXPIRED:
5d422301
TM		 377 if (state != NULL) {
378 ret = nfs4_schedule_stateid_recovery(server, state);
379 if (ret < 0)
380 break;
381 }
65de872e 382 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 383 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 384 nfs4_schedule_lease_recovery(clp);
385 goto wait_on_recovery;
03391693 386#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 387 case -NFS4ERR_BADSESSION:
388 case -NFS4ERR_BADSLOT:
389 case -NFS4ERR_BAD_HIGH_SLOT:
390 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
391 case -NFS4ERR_DEADSESSION:
392 case -NFS4ERR_SEQ_FALSE_RETRY:
393 case -NFS4ERR_SEQ_MISORDERED:
394 dprintk("%s ERROR: %d Reset session\n", __func__,
395 errorcode);
9f594791 396 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 397 goto wait_on_recovery;
03391693 398#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 399 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 400 if (exception->timeout > HZ) {
401 /* We have retried a decent amount, time to
402 * fail
403 */
404 ret = -EBUSY;
405 break;
406 }
65de872e
TM		 407 case -NFS4ERR_GRACE:
408 case -NFS4ERR_DELAY:
409 ret = nfs4_delay(server->client, &exception->timeout);
410 if (ret != 0)
411 break;
a8a4ae3a 412 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 413 case -NFS4ERR_OLD_STATEID:
414 exception->retry = 1;
b064eca2
TM		 415 break;
416 case -NFS4ERR_BADOWNER:
417 /* The following works around a Linux server bug! */
418 case -NFS4ERR_BADNAME:
419 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
420 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
421 exception->retry = 1;
422 printk(KERN_WARNING "NFS: v4 server %s "
423 "does not accept raw "
424 "uid/gids. "
425 "Reenabling the idmapper.\n",
426 server->nfs_client->cl_hostname);
427 }
65de872e
TM		 428 }
429 /* We failed to handle the error */
430 return nfs4_map_errors(ret);
0400a6b0 431wait_on_recovery:
a2c0b9e2
TM		 432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret == 0)
434 exception->retry = 1;
435 return ret;
65de872e
TM		 436}
437
438
452e9352 439static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 440{
1da177e4
LT		 441 spin_lock(&clp->cl_lock);
442 if (time_before(clp->cl_last_renewal,timestamp))
443 clp->cl_last_renewal = timestamp;
444 spin_unlock(&clp->cl_lock);
445}
446
452e9352
TM		 447static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
448{
449 do_renew_lease(server->nfs_client, timestamp);
450}
451
cccef3b9
AA		 452#if defined(CONFIG_NFS_V4_1)
453
d185a334 454static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 455{
e3725ec0 456 struct nfs4_session *session;
13615871 457 struct nfs4_slot_table *tbl;
c10e4498 458 bool send_new_highest_used_slotid = false;
13615871 459
dfb4f309 460 if (!res->sr_slot) {
13615871
AA		 461 /* just wake up the next guy waiting since
462 * we may have not consumed a slot after all */
691daf3b 463 dprintk("%s: No slot\n", __func__);
35dc1d74 464 return;
13615871 465 }
e3725ec0
TM		 466 tbl = res->sr_slot->table;
467 session = tbl->session;
ea028ac9 468
35dc1d74 469 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 470 /* Be nice to the server: try to ensure that the last transmitted
471 * value for highest_user_slotid <= target_highest_slotid
472 */
473 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
474 send_new_highest_used_slotid = true;
475
b75ad4cd
TM		 476 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
477 send_new_highest_used_slotid = false;
478 goto out_unlock;
479 }
f4af6e2a 480 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 481
482 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
483 send_new_highest_used_slotid = false;
b75ad4cd 484out_unlock:
35dc1d74 485 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 486 res->sr_slot = NULL;
c10e4498
TM		 487 if (send_new_highest_used_slotid)
488 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 489}
490
14516c3a 491static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 492{
e3725ec0 493 struct nfs4_session *session;
933602e3 494 struct nfs4_slot *slot;
14516c3a 495 struct nfs_client *clp;
ac20d163 496 bool interrupted = false;
85563073 497 int ret = 1;
b0df806c 498
468f8613
BS		 499 /* don't increment the sequence number if the task wasn't sent */
500 if (!RPC_WAS_SENT(task))
b0df806c
AA		 501 goto out;
502
933602e3 503 slot = res->sr_slot;
e3725ec0 504 session = slot->table->session;
933602e3 505
ac20d163
TM		 506 if (slot->interrupted) {
507 slot->interrupted = 0;
508 interrupted = true;
509 }
510
691daf3b 511 /* Check the SEQUENCE operation status */
14516c3a
TM		 512 switch (res->sr_status) {
513 case 0:
b0df806c 514 /* Update the slot's sequence and clientid lease timer */
933602e3 515 ++slot->seq_nr;
e3725ec0 516 clp = session->clp;
8e63b6a8 517 do_renew_lease(clp, res->sr_timestamp);
0629e370 518 /* Check sequence flags */
b4410c2f
TM		 519 if (res->sr_status_flags != 0)
520 nfs4_schedule_lease_recovery(clp);
464ee9f9 521 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 522 break;
ac20d163
TM		 523 case 1:
524 /*
525 * sr_status remains 1 if an RPC level error occurred.
526 * The server may or may not have processed the sequence
527 * operation..
528 * Mark the slot as having hosted an interrupted RPC call.
529 */
530 slot->interrupted = 1;
531 goto out;
14516c3a
TM		 532 case -NFS4ERR_DELAY:
533 /* The server detected a resend of the RPC call and
534 * returned NFS4ERR_DELAY as per Section 2.10.6.2
535 * of RFC5661.
536 */
df2fabff 537 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 538 __func__,
df2fabff 539 slot->slot_nr,
933602e3 540 slot->seq_nr);
14516c3a 541 goto out_retry;
85563073
TM		 542 case -NFS4ERR_BADSLOT:
543 /*
544 * The slot id we used was probably retired. Try again
545 * using a different slot id.
546 */
e8794440
TM		 547 goto retry_nowait;
548 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 549 /*
550 * Was the last operation on this sequence interrupted?
551 * If so, retry after bumping the sequence number.
552 */
553 if (interrupted) {
554 ++slot->seq_nr;
555 goto retry_nowait;
556 }
e8794440
TM		 557 /*
558 * Could this slot have been previously retired?
559 * If so, then the server may be expecting seq_nr = 1!
560 */
8e63b6a8
TM		 561 if (slot->seq_nr != 1) {
562 slot->seq_nr = 1;
563 goto retry_nowait;
564 }
565 break;
e8794440
TM		 566 case -NFS4ERR_SEQ_FALSE_RETRY:
567 ++slot->seq_nr;
568 goto retry_nowait;
14516c3a
TM		 569 default:
570 /* Just update the slot sequence no. */
933602e3 571 ++slot->seq_nr;
b0df806c
AA		 572 }
573out:
574 /* The session may be reset by one of the error handlers. */
575 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 576 nfs41_sequence_free_slot(res);
85563073 577 return ret;
e8794440
TM		 578retry_nowait:
579 if (rpc_restart_call_prepare(task)) {
580 task->tk_status = 0;
581 ret = 0;
582 }
583 goto out;
14516c3a 584out_retry:
d05dd4e9 585 if (!rpc_restart_call(task))
14516c3a
TM		 586 goto out;
587 rpc_delay(task, NFS4_POLL_RETRY_MAX);
588 return 0;
b0df806c
AA		 589}
590
14516c3a
TM		 591static int nfs4_sequence_done(struct rpc_task *task,
592 struct nfs4_sequence_res *res)
df896455 593{
e3725ec0 594 if (res->sr_slot == NULL)
14516c3a
TM		 595 return 1;
596 return nfs41_sequence_done(task, res);
df896455
TM		 597}
598
9d12b216
TM		 599static void nfs41_init_sequence(struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res, int cache_reply)
601{
2b2fa717 602 args->sa_slot = NULL;
9d12b216 603 args->sa_cache_this = 0;
8fe72bac 604 args->sa_privileged = 0;
9d12b216
TM		 605 if (cache_reply)
606 args->sa_cache_this = 1;
9d12b216
TM		 607 res->sr_slot = NULL;
608}
609
8fe72bac
TM		 610static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
611{
612 args->sa_privileged = 1;
613}
614
dc70d7b3 615int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 616 struct nfs4_sequence_args *args,
617 struct nfs4_sequence_res *res,
ce5039c1
AA		 618 struct rpc_task *task)
619{
fbcd4abc
AA		 620 struct nfs4_slot *slot;
621 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 622
623 dprintk("--> %s\n", __func__);
ce5039c1 624 /* slot already allocated? */
dfb4f309 625 if (res->sr_slot != NULL)
d9afbd1b 626 goto out_success;
ce5039c1 627
fbcd4abc
AA		 628 tbl = &session->fc_slot_table;
629
69d206b5
TM		 630 task->tk_timeout = 0;
631
fbcd4abc 632 spin_lock(&tbl->slot_tbl_lock);
774d5f14 633 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 634 !args->sa_privileged) {
0b1c8fc4 635 /* The state manager will wait until the slot table is empty */
0b1c8fc4 636 dprintk("%s session is draining\n", __func__);
7b939a3f 637 goto out_sleep;
689cf5c1
AB		 638 }
639
2dc03b7f 640 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 641 if (IS_ERR(slot)) {
642 /* If out of memory, try again in 1/4 second */
643 if (slot == ERR_PTR(-ENOMEM))
644 task->tk_timeout = HZ >> 2;
fbcd4abc 645 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 646 goto out_sleep;
fbcd4abc
AA		 647 }
648 spin_unlock(&tbl->slot_tbl_lock);
649
2b2fa717 650 args->sa_slot = slot;
fbcd4abc 651
2dc03b7f
TM		 652 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
653 slot->slot_nr, slot->seq_nr);
fbcd4abc 654
dfb4f309 655 res->sr_slot = slot;
8e63b6a8 656 res->sr_timestamp = jiffies;
2a6e26cd 657 res->sr_status_flags = 0;
fbcd4abc
AA		 658 /*
659 * sr_status is only set in decode_sequence, and so will remain
660 * set to 1 if an rpc level failure occurs.
661 */
662 res->sr_status = 1;
d9afbd1b
TM		 663out_success:
664 rpc_call_start(task);
ce5039c1 665 return 0;
7b939a3f 666out_sleep:
8fe72bac
TM		 667 /* Privileged tasks are queued with top priority */
668 if (args->sa_privileged)
1e1093c7
TM		 669 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
670 NULL, RPC_PRIORITY_PRIVILEGED);
671 else
672 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 673 spin_unlock(&tbl->slot_tbl_lock);
674 return -EAGAIN;
ce5039c1 675}
dc70d7b3 676EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 677
035168ab 678int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
ce5039c1
AA		 681 struct rpc_task *task)
682{
035168ab 683 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 684 int ret = 0;
685
d9afbd1b
TM		 686 if (session == NULL) {
687 rpc_call_start(task);
035168ab 688 goto out;
d9afbd1b 689 }
035168ab 690
df2fabff 691 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 692 __func__, session->clp, session, res->sr_slot ?
df2fabff 693 res->sr_slot->slot_nr : -1);
ce5039c1 694
9d12b216 695 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 696out:
697 dprintk("<-- %s status=%d\n", __func__, ret);
698 return ret;
699}
700
701struct nfs41_call_sync_data {
035168ab 702 const struct nfs_server *seq_server;
ce5039c1
AA		 703 struct nfs4_sequence_args *seq_args;
704 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 705};
706
707static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
708{
709 struct nfs41_call_sync_data *data = calldata;
6ba7db34 710 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 711
035168ab
TM		 712 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
713
d9afbd1b 714 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 715}
716
69ab40c4
AA		 717static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
718{
719 struct nfs41_call_sync_data *data = calldata;
720
14516c3a 721 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 722}
723
17280175 724static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 725 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 726 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 727};
728
7c513058
BS		 729static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
730 struct nfs_server *server,
ce5039c1
AA		 731 struct rpc_message *msg,
732 struct nfs4_sequence_args *args,
8fe72bac 733 struct nfs4_sequence_res *res)
ce5039c1
AA		 734{
735 int ret;
736 struct rpc_task *task;
737 struct nfs41_call_sync_data data = {
035168ab 738 .seq_server = server,
ce5039c1
AA		 739 .seq_args = args,
740 .seq_res = res,
ce5039c1
AA		 741 };
742 struct rpc_task_setup task_setup = {
7c513058 743 .rpc_client = clnt,
ce5039c1
AA		 744 .rpc_message = msg,
745 .callback_ops = &nfs41_call_sync_ops,
746 .callback_data = &data
747 };
748
ce5039c1
AA		 749 task = rpc_run_task(&task_setup);
750 if (IS_ERR(task))
751 ret = PTR_ERR(task);
752 else {
753 ret = task->tk_status;
754 rpc_put_task(task);
755 }
756 return ret;
757}
758
df896455 759#else
8fe72bac 760static
9d12b216
TM		 761void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
763{
764}
765
8fe72bac
TM		 766static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
767{
768}
769
770
14516c3a
TM		 771static int nfs4_sequence_done(struct rpc_task *task,
772 struct nfs4_sequence_res *res)
df896455 773{
14516c3a 774 return 1;
df896455 775}
cccef3b9
AA		 776#endif /* CONFIG_NFS_V4_1 */
777
fd0c0953 778static
7c513058
BS		 779int _nfs4_call_sync(struct rpc_clnt *clnt,
780 struct nfs_server *server,
cccef3b9
AA		 781 struct rpc_message *msg,
782 struct nfs4_sequence_args *args,
fd0c0953 783 struct nfs4_sequence_res *res)
cccef3b9 784{
7c513058 785 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 786}
787
fd0c0953 788static
7c513058
BS		 789int nfs4_call_sync(struct rpc_clnt *clnt,
790 struct nfs_server *server,
e73b83f2
BS		 791 struct rpc_message *msg,
792 struct nfs4_sequence_args *args,
793 struct nfs4_sequence_res *res,
794 int cache_reply)
795{
fd0c0953 796 nfs41_init_sequence(args, res, cache_reply);
7c513058 797 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 798 args, res);
e73b83f2 799}
cccef3b9 800
38478b24 801static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 802{
38478b24 803 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 804
38478b24 805 spin_lock(&dir->i_lock);
359d7d1c 806 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 807 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 808 nfs_force_lookup_revalidate(dir);
a9a4a87a 809 dir->i_version = cinfo->after;
de242c0b 810 nfs_fscache_invalidate(dir);
38478b24 811 spin_unlock(&dir->i_lock);
1da177e4
LT		 812}
813
e56e0b78 814struct nfs4_opendata {
c6d00e63 815 struct kref kref;
e56e0b78
TM		 816 struct nfs_openargs o_arg;
817 struct nfs_openres o_res;
cdd4e68b
TM		 818 struct nfs_open_confirmargs c_arg;
819 struct nfs_open_confirmres c_res;
6926afd1
TM		 820 struct nfs4_string owner_name;
821 struct nfs4_string group_name;
e56e0b78 822 struct nfs_fattr f_attr;
1775fd3e 823 struct nfs4_label *f_label;
e56e0b78 824 struct dentry *dir;
82a2c1b7 825 struct dentry *dentry;
e56e0b78 826 struct nfs4_state_owner *owner;
aac00a8d 827 struct nfs4_state *state;
e56e0b78 828 struct iattr attrs;
26e976a8 829 unsigned long timestamp;
3e309914 830 unsigned int rpc_done : 1;
bdeca1b7 831 unsigned int is_recover : 1;
24ac23ab
TM		 832 int rpc_status;
833 int cancelled;
e56e0b78
TM		 834};
835
49f9a0fa
TM		 836static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
837 int err, struct nfs4_exception *exception)
838{
839 if (err != -EINVAL)
840 return false;
841 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
842 return false;
843 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
844 exception->retry = 1;
845 return true;
846}
847
848static enum open_claim_type4
849nfs4_map_atomic_open_claim(struct nfs_server *server,
850 enum open_claim_type4 claim)
851{
852 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
853 return claim;
854 switch (claim) {
855 default:
856 return claim;
857 case NFS4_OPEN_CLAIM_FH:
858 return NFS4_OPEN_CLAIM_NULL;
859 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
860 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
861 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
862 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
863 }
864}
2ced46c2
TM		 865
866static void nfs4_init_opendata_res(struct nfs4_opendata *p)
867{
868 p->o_res.f_attr = &p->f_attr;
1775fd3e 869 p->o_res.f_label = p->f_label;
c1d51931
TM		 870 p->o_res.seqid = p->o_arg.seqid;
871 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 872 p->o_res.server = p->o_arg.server;
5f657530 873 p->o_res.access_request = p->o_arg.access;
2ced46c2 874 nfs_fattr_init(&p->f_attr);
6926afd1 875 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 876}
877
82a2c1b7 878static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 879 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 880 const struct iattr *attrs,
1775fd3e 881 struct nfs4_label *label,
4a1c0893 882 enum open_claim_type4 claim,
8535b2be 883 gfp_t gfp_mask)
e56e0b78 884{
82a2c1b7 885 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 886 struct inode *dir = parent->d_inode;
887 struct nfs_server *server = NFS_SERVER(dir);
888 struct nfs4_opendata *p;
889
8535b2be 890 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 891 if (p == NULL)
892 goto err;
14c43f76
DQ		 893
894 p->f_label = nfs4_label_alloc(server, gfp_mask);
895 if (IS_ERR(p->f_label))
896 goto err_free_p;
897
8535b2be 898 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 899 if (p->o_arg.seqid == NULL)
14c43f76 900 goto err_free_label;
82a2c1b7
AV		 901 nfs_sb_active(dentry->d_sb);
902 p->dentry = dget(dentry);
e56e0b78
TM		 903 p->dir = parent;
904 p->owner = sp;
905 atomic_inc(&sp->so_count);
dc0b027d
TM		 906 p->o_arg.open_flags = flags;
907 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 908 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
909 * will return permission denied for all bits until close */
910 if (!(flags & O_EXCL)) {
911 /* ask server to check for all possible rights as results
912 * are cached */
913 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
914 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 915 }
7539bbab 916 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 917 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
918 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 919 p->o_arg.name = &dentry->d_name;
e56e0b78 920 p->o_arg.server = server;
aa9c2669 921 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 922 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 923 p->o_arg.label = label;
49f9a0fa
TM		 924 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
925 switch (p->o_arg.claim) {
4a1c0893
TM		 926 case NFS4_OPEN_CLAIM_NULL:
927 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
928 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
929 p->o_arg.fh = NFS_FH(dir);
930 break;
931 case NFS4_OPEN_CLAIM_PREVIOUS:
932 case NFS4_OPEN_CLAIM_FH:
933 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 p->o_arg.fh = NFS_FH(dentry->d_inode);
936 }
536e43d1 937 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 938 __u32 verf[2];
d77d76ff 939
e56e0b78
TM		 940 p->o_arg.u.attrs = &p->attrs;
941 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 942
943 verf[0] = jiffies;
944 verf[1] = current->pid;
945 memcpy(p->o_arg.u.verifier.data, verf,
946 sizeof(p->o_arg.u.verifier.data));
e56e0b78 947 }
cdd4e68b
TM		 948 p->c_arg.fh = &p->o_res.fh;
949 p->c_arg.stateid = &p->o_res.stateid;
950 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 951 nfs4_init_opendata_res(p);
c6d00e63 952 kref_init(&p->kref);
e56e0b78 953 return p;
14c43f76
DQ		 954
955err_free_label:
956 nfs4_label_free(p->f_label);
957err_free_p:
e56e0b78
TM		 958 kfree(p);
959err:
960 dput(parent);
961 return NULL;
962}
963
c6d00e63 964static void nfs4_opendata_free(struct kref *kref)
e56e0b78 965{
c6d00e63
TM		 966 struct nfs4_opendata *p = container_of(kref,
967 struct nfs4_opendata, kref);
82a2c1b7 968 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 969
970 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 971 if (p->state != NULL)
972 nfs4_put_open_state(p->state);
c6d00e63 973 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 974
975 nfs4_label_free(p->f_label);
976
c6d00e63 977 dput(p->dir);
82a2c1b7
AV		 978 dput(p->dentry);
979 nfs_sb_deactive(sb);
6926afd1 980 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 981 kfree(p);
982}
983
984static void nfs4_opendata_put(struct nfs4_opendata *p)
985{
986 if (p != NULL)
987 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 988}
989
06f814a3
TM		 990static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
991{
06f814a3
TM		 992 int ret;
993
06f814a3 994 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 995 return ret;
996}
997
dc0b027d 998static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 999{
1000 int ret = 0;
dc0b027d 1001
536e43d1 1002 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1003 goto out;
1004 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1005 case FMODE_READ:
88069f77
TM		 1006 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1007 && state->n_rdonly != 0;
6ee41268
TM		 1008 break;
1009 case FMODE_WRITE:
88069f77
TM		 1010 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1011 && state->n_wronly != 0;
6ee41268
TM		 1012 break;
1013 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1014 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1015 && state->n_rdwr != 0;
6ee41268 1016 }
dc0b027d 1017out:
6ee41268
TM		 1018 return ret;
1019}
1020
dc0b027d 1021static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1022{
652f89f6
TM		 1023 if (delegation == NULL)
1024 return 0;
dc0b027d 1025 if ((delegation->type & fmode) != fmode)
aac00a8d 1026 return 0;
15c831bf 1027 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1028 return 0;
d25be546
TM		 1029 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1030 return 0;
b7391f44 1031 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1032 return 1;
1033}
1034
dc0b027d 1035static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1036{
dc0b027d 1037 switch (fmode) {
e7616923
TM		 1038 case FMODE_WRITE:
1039 state->n_wronly++;
1040 break;
1041 case FMODE_READ:
1042 state->n_rdonly++;
1043 break;
1044 case FMODE_READ|FMODE_WRITE:
1045 state->n_rdwr++;
1046 }
dc0b027d 1047 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1048}
1049
dc0b027d 1050static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1051{
1052 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1053 nfs4_stateid_copy(&state->stateid, stateid);
1054 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1055 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1056 switch (fmode) {
003707c7
TM		 1057 case FMODE_READ:
1058 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1059 break;
1060 case FMODE_WRITE:
1061 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1062 break;
1063 case FMODE_READ|FMODE_WRITE:
1064 set_bit(NFS_O_RDWR_STATE, &state->flags);
1065 }
e7616923
TM		 1066}
1067
dc0b027d 1068static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1069{
8bda4e4c 1070 write_seqlock(&state->seqlock);
dc0b027d 1071 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1072 write_sequnlock(&state->seqlock);
003707c7
TM		 1073}
1074
dc0b027d 1075static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1076{
8bda4e4c
TM		 1077 /*
1078 * Protect the call to nfs4_state_set_mode_locked and
1079 * serialise the stateid update
1080 */
1081 write_seqlock(&state->seqlock);
003707c7 1082 if (deleg_stateid != NULL) {
f597c537 1083 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1084 set_bit(NFS_DELEGATED_STATE, &state->flags);
1085 }
1086 if (open_stateid != NULL)
dc0b027d 1087 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1088 write_sequnlock(&state->seqlock);
1089 spin_lock(&state->owner->so_lock);
dc0b027d 1090 update_open_stateflags(state, fmode);
ec073428 1091 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1092}
1093
dc0b027d 1094static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1095{
1096 struct nfs_inode *nfsi = NFS_I(state->inode);
1097 struct nfs_delegation *deleg_cur;
1098 int ret = 0;
1099
dc0b027d 1100 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1101
1102 rcu_read_lock();
1103 deleg_cur = rcu_dereference(nfsi->delegation);
1104 if (deleg_cur == NULL)
1105 goto no_delegation;
1106
1107 spin_lock(&deleg_cur->lock);
17f26b12 1108 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1109 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1110 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1111 goto no_delegation_unlock;
1112
1113 if (delegation == NULL)
1114 delegation = &deleg_cur->stateid;
f597c537 1115 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1116 goto no_delegation_unlock;
1117
b7391f44 1118 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1119 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1120 ret = 1;
1121no_delegation_unlock:
1122 spin_unlock(&deleg_cur->lock);
1123no_delegation:
1124 rcu_read_unlock();
1125
1126 if (!ret && open_stateid != NULL) {
dc0b027d 1127 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1128 ret = 1;
1129 }
1130
1131 return ret;
1132}
1133
1134
dc0b027d 1135static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1136{
1137 struct nfs_delegation *delegation;
1138
1139 rcu_read_lock();
1140 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1141 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1142 rcu_read_unlock();
1143 return;
1144 }
1145 rcu_read_unlock();
57ec14c5 1146 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1147}
1148
6ee41268 1149static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1150{
1151 struct nfs4_state *state = opendata->state;
1152 struct nfs_inode *nfsi = NFS_I(state->inode);
1153 struct nfs_delegation *delegation;
f448badd 1154 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1155 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1156 nfs4_stateid stateid;
1157 int ret = -EAGAIN;
1158
aac00a8d 1159 for (;;) {
dc0b027d 1160 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1161 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1162 if (can_open_cached(state, fmode, open_mode)) {
1163 update_open_stateflags(state, fmode);
6ee41268 1164 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1165 goto out_return_state;
1166 }
1167 spin_unlock(&state->owner->so_lock);
1168 }
34310430
TM		 1169 rcu_read_lock();
1170 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1171 if (!can_open_delegated(delegation, fmode)) {
34310430 1172 rcu_read_unlock();
aac00a8d 1173 break;
34310430 1174 }
aac00a8d 1175 /* Save the delegation */
f597c537 1176 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1177 rcu_read_unlock();
fa332941 1178 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1179 if (!opendata->is_recover) {
1180 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1181 if (ret != 0)
1182 goto out;
1183 }
aac00a8d 1184 ret = -EAGAIN;
34310430
TM		 1185
1186 /* Try to update the stateid using the delegation */
dc0b027d 1187 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1188 goto out_return_state;
aac00a8d 1189 }
aac00a8d
TM		 1190out:
1191 return ERR_PTR(ret);
1192out_return_state:
1193 atomic_inc(&state->count);
1194 return state;
1195}
1196
e23008ec
AA		 1197static void
1198nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1199{
1200 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1201 struct nfs_delegation *delegation;
1202 int delegation_flags = 0;
1203
1204 rcu_read_lock();
1205 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1206 if (delegation)
1207 delegation_flags = delegation->flags;
1208 rcu_read_unlock();
1209 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1210 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1211 "returning a delegation for "
1212 "OPEN(CLAIM_DELEGATE_CUR)\n",
1213 clp->cl_hostname);
1214 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1215 nfs_inode_set_delegation(state->inode,
1216 data->owner->so_cred,
1217 &data->o_res);
1218 else
1219 nfs_inode_reclaim_delegation(state->inode,
1220 data->owner->so_cred,
1221 &data->o_res);
1222}
1223
1224/*
1225 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1226 * and update the nfs4_state.
1227 */
1228static struct nfs4_state *
1229_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1230{
1231 struct inode *inode = data->state->inode;
1232 struct nfs4_state *state = data->state;
1233 int ret;
1234
1235 if (!data->rpc_done) {
1236 ret = data->rpc_status;
1237 goto err;
1238 }
1239
1240 ret = -ESTALE;
1241 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1242 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1243 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1244 goto err;
1245
1246 ret = -ENOMEM;
1247 state = nfs4_get_open_state(inode, data->owner);
1248 if (state == NULL)
1249 goto err;
1250
1251 ret = nfs_refresh_inode(inode, &data->f_attr);
1252 if (ret)
1253 goto err;
1254
aa9c2669
DQ		 1255 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1256
e23008ec
AA		 1257 if (data->o_res.delegation_type != 0)
1258 nfs4_opendata_check_deleg(data, state);
1259 update_open_stateid(state, &data->o_res.stateid, NULL,
1260 data->o_arg.fmode);
1261
1262 return state;
1263err:
1264 return ERR_PTR(ret);
1265
1266}
1267
1268static struct nfs4_state *
1269_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1270{
1271 struct inode *inode;
1272 struct nfs4_state *state = NULL;
1b370bc2 1273 int ret;
24ac23ab 1274
aac00a8d 1275 if (!data->rpc_done) {
6ee41268 1276 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1277 goto out;
1278 }
1279
1b370bc2 1280 ret = -EAGAIN;
24ac23ab 1281 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1282 goto err;
1775fd3e 1283 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1284 ret = PTR_ERR(inode);
03f28e3a 1285 if (IS_ERR(inode))
1b370bc2
TM		 1286 goto err;
1287 ret = -ENOMEM;
24ac23ab
TM		 1288 state = nfs4_get_open_state(inode, data->owner);
1289 if (state == NULL)
1b370bc2 1290 goto err_put_inode;
e23008ec
AA		 1291 if (data->o_res.delegation_type != 0)
1292 nfs4_opendata_check_deleg(data, state);
34310430 1293 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1294 data->o_arg.fmode);
24ac23ab 1295 iput(inode);
aac00a8d 1296out:
7aa262b5 1297 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1298 return state;
1b370bc2
TM		 1299err_put_inode:
1300 iput(inode);
1301err:
1302 return ERR_PTR(ret);
24ac23ab
TM		 1303}
1304
e23008ec
AA		 1305static struct nfs4_state *
1306nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1307{
1308 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1309 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1310 return _nfs4_opendata_to_nfs4_state(data);
1311}
1312
864472e9
TM		 1313static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1314{
1315 struct nfs_inode *nfsi = NFS_I(state->inode);
1316 struct nfs_open_context *ctx;
1317
1318 spin_lock(&state->inode->i_lock);
1319 list_for_each_entry(ctx, &nfsi->open_files, list) {
1320 if (ctx->state != state)
1321 continue;
1322 get_nfs_open_context(ctx);
1323 spin_unlock(&state->inode->i_lock);
1324 return ctx;
1325 }
1326 spin_unlock(&state->inode->i_lock);
1327 return ERR_PTR(-ENOENT);
1328}
1329
4a1c0893
TM		 1330static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1331 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1332{
1333 struct nfs4_opendata *opendata;
1334
4a1c0893 1335 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1336 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1337 if (opendata == NULL)
1338 return ERR_PTR(-ENOMEM);
1339 opendata->state = state;
1340 atomic_inc(&state->count);
1341 return opendata;
1342}
1343
dc0b027d 1344static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1345{
2ced46c2 1346 struct nfs4_state *newstate;
864472e9
TM		 1347 int ret;
1348
dc0b027d
TM		 1349 opendata->o_arg.open_flags = 0;
1350 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1351 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1352 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1353 nfs4_init_opendata_res(opendata);
b257957e 1354 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1355 if (ret != 0)
1356 return ret;
2ced46c2 1357 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1358 if (IS_ERR(newstate))
1359 return PTR_ERR(newstate);
643168c2 1360 nfs4_close_state(newstate, fmode);
2ced46c2 1361 *res = newstate;
864472e9
TM		 1362 return 0;
1363}
1364
1365static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1366{
864472e9 1367 struct nfs4_state *newstate;
864472e9
TM		 1368 int ret;
1369
1370 /* memory barrier prior to reading state->n_* */
2ced46c2 1371 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1372 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1373 smp_rmb();
1374 if (state->n_rdwr != 0) {
b0ed9dbc 1375 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1376 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1377 if (ret != 0)
1378 return ret;
2ced46c2
TM		 1379 if (newstate != state)
1380 return -ESTALE;
864472e9
TM		 1381 }
1382 if (state->n_wronly != 0) {
b0ed9dbc 1383 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1384 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1385 if (ret != 0)
1386 return ret;
2ced46c2
TM		 1387 if (newstate != state)
1388 return -ESTALE;
864472e9
TM		 1389 }
1390 if (state->n_rdonly != 0) {
b0ed9dbc 1391 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1392 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1393 if (ret != 0)
1394 return ret;
2ced46c2
TM		 1395 if (newstate != state)
1396 return -ESTALE;
864472e9 1397 }
1ac7e2fd
TM		 1398 /*
1399 * We may have performed cached opens for all three recoveries.
1400 * Check if we need to update the current stateid.
1401 */
1402 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1403 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1404 write_seqlock(&state->seqlock);
1ac7e2fd 1405 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1406 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1407 write_sequnlock(&state->seqlock);
1ac7e2fd 1408 }
864472e9
TM		 1409 return 0;
1410}
1411
1da177e4
LT		 1412/*
1413 * OPEN_RECLAIM:
1414 * reclaim state on the server after a reboot.
1da177e4 1415 */
539cd03a 1416static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1417{
1ac7e2fd 1418 struct nfs_delegation *delegation;
864472e9 1419 struct nfs4_opendata *opendata;
dc0b027d 1420 fmode_t delegation_type = 0;
1da177e4
LT		 1421 int status;
1422
4a1c0893
TM		 1423 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1424 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1425 if (IS_ERR(opendata))
1426 return PTR_ERR(opendata);
1ac7e2fd
TM		 1427 rcu_read_lock();
1428 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1429 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1430 delegation_type = delegation->type;
1ac7e2fd 1431 rcu_read_unlock();
864472e9
TM		 1432 opendata->o_arg.u.delegation_type = delegation_type;
1433 status = nfs4_open_recover(opendata, state);
c6d00e63 1434 nfs4_opendata_put(opendata);
1da177e4
LT		 1435 return status;
1436}
1437
539cd03a 1438static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1439{
1440 struct nfs_server *server = NFS_SERVER(state->inode);
1441 struct nfs4_exception exception = { };
1442 int err;
1443 do {
539cd03a 1444 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1445 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1446 continue;
168667c4 1447 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1448 break;
1449 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1450 } while (exception.retry);
1451 return err;
1452}
1453
864472e9
TM		 1454static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1455{
1456 struct nfs_open_context *ctx;
1457 int ret;
1458
1459 ctx = nfs4_state_find_open_context(state);
1460 if (IS_ERR(ctx))
91876b13 1461 return -EAGAIN;
539cd03a 1462 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1463 put_nfs_open_context(ctx);
1464 return ret;
1465}
1466
db4f2e63 1467static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1468{
be76b5b6
TM		 1469 switch (err) {
1470 default:
1471 printk(KERN_ERR "NFS: %s: unhandled error "
1472 "%d.\n", __func__, err);
1473 case 0:
1474 case -ENOENT:
1475 case -ESTALE:
1476 break;
1477 case -NFS4ERR_BADSESSION:
1478 case -NFS4ERR_BADSLOT:
1479 case -NFS4ERR_BAD_HIGH_SLOT:
1480 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1481 case -NFS4ERR_DEADSESSION:
1482 set_bit(NFS_DELEGATED_STATE, &state->flags);
1483 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1484 return -EAGAIN;
1485 case -NFS4ERR_STALE_CLIENTID:
1486 case -NFS4ERR_STALE_STATEID:
1487 set_bit(NFS_DELEGATED_STATE, &state->flags);
1488 case -NFS4ERR_EXPIRED:
1489 /* Don't recall a delegation if it was lost */
1490 nfs4_schedule_lease_recovery(server->nfs_client);
1491 return -EAGAIN;
1492 case -NFS4ERR_DELEG_REVOKED:
1493 case -NFS4ERR_ADMIN_REVOKED:
1494 case -NFS4ERR_BAD_STATEID:
db4f2e63 1495 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1496 nfs_inode_find_state_and_recover(state->inode,
1497 stateid);
1498 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1499 return 0;
1500 case -NFS4ERR_DELAY:
1501 case -NFS4ERR_GRACE:
1502 set_bit(NFS_DELEGATED_STATE, &state->flags);
1503 ssleep(1);
1504 return -EAGAIN;
db4f2e63
TM		 1505 case -ENOMEM:
1506 case -NFS4ERR_DENIED:
1507 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1508 return 0;
be76b5b6 1509 }
1da177e4
LT		 1510 return err;
1511}
1512
db4f2e63
TM		 1513int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1514{
1515 struct nfs_server *server = NFS_SERVER(state->inode);
1516 struct nfs4_opendata *opendata;
1517 int err;
1518
1519 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1520 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1521 if (IS_ERR(opendata))
1522 return PTR_ERR(opendata);
1523 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1524 err = nfs4_open_recover(opendata, state);
1525 nfs4_opendata_put(opendata);
1526 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1527}
1528
cdd4e68b
TM		 1529static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1530{
1531 struct nfs4_opendata *data = calldata;
1532
1533 data->rpc_status = task->tk_status;
26e976a8 1534 if (data->rpc_status == 0) {
f597c537 1535 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1536 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1537 renew_lease(data->o_res.server, data->timestamp);
3e309914 1538 data->rpc_done = 1;
26e976a8 1539 }
cdd4e68b
TM		 1540}
1541
1542static void nfs4_open_confirm_release(void *calldata)
1543{
1544 struct nfs4_opendata *data = calldata;
1545 struct nfs4_state *state = NULL;
1546
1547 /* If this request hasn't been cancelled, do nothing */
1548 if (data->cancelled == 0)
1549 goto out_free;
1550 /* In case of error, no cleanup! */
3e309914 1551 if (!data->rpc_done)
cdd4e68b 1552 goto out_free;
cdd4e68b 1553 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1554 if (!IS_ERR(state))
643168c2 1555 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1556out_free:
c6d00e63 1557 nfs4_opendata_put(data);
cdd4e68b
TM		 1558}
1559
1560static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1561 .rpc_call_done = nfs4_open_confirm_done,
1562 .rpc_release = nfs4_open_confirm_release,
1563};
1564
1565/*
1566 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1567 */
1568static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1569{
1570 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1571 struct rpc_task *task;
5138fde0
TM		 1572 struct rpc_message msg = {
1573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1574 .rpc_argp = &data->c_arg,
1575 .rpc_resp = &data->c_res,
1576 .rpc_cred = data->owner->so_cred,
1577 };
c970aa85
TM		 1578 struct rpc_task_setup task_setup_data = {
1579 .rpc_client = server->client,
5138fde0 1580 .rpc_message = &msg,
c970aa85
TM		 1581 .callback_ops = &nfs4_open_confirm_ops,
1582 .callback_data = data,
101070ca 1583 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1584 .flags = RPC_TASK_ASYNC,
1585 };
1da177e4
LT		 1586 int status;
1587
c6d00e63 1588 kref_get(&data->kref);
3e309914
TM		 1589 data->rpc_done = 0;
1590 data->rpc_status = 0;
5138fde0 1591 data->timestamp = jiffies;
c970aa85 1592 task = rpc_run_task(&task_setup_data);
7a1218a2 1593 if (IS_ERR(task))
cdd4e68b 1594 return PTR_ERR(task);
cdd4e68b
TM		 1595 status = nfs4_wait_for_completion_rpc_task(task);
1596 if (status != 0) {
1597 data->cancelled = 1;
1598 smp_wmb();
1599 } else
1600 status = data->rpc_status;
e6b3c4db 1601 rpc_put_task(task);
1da177e4
LT		 1602 return status;
1603}
1604
24ac23ab 1605static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1606{
24ac23ab
TM		 1607 struct nfs4_opendata *data = calldata;
1608 struct nfs4_state_owner *sp = data->owner;
549b19cc 1609 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1610
24ac23ab 1611 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1612 goto out_wait;
aac00a8d
TM		 1613 /*
1614 * Check if we still need to send an OPEN call, or if we can use
1615 * a delegation instead.
1616 */
1617 if (data->state != NULL) {
1618 struct nfs_delegation *delegation;
1619
dc0b027d 1620 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1621 goto out_no_action;
aac00a8d
TM		 1622 rcu_read_lock();
1623 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1624 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1625 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1626 can_open_delegated(delegation, data->o_arg.fmode))
1627 goto unlock_no_action;
aac00a8d
TM		 1628 rcu_read_unlock();
1629 }
95b72eb0 1630 /* Update client id. */
549b19cc 1631 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1632 switch (data->o_arg.claim) {
1633 case NFS4_OPEN_CLAIM_PREVIOUS:
1634 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1635 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1636 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1637 case NFS4_OPEN_CLAIM_FH:
1638 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1639 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1640 }
26e976a8 1641 data->timestamp = jiffies;
035168ab 1642 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1643 &data->o_arg.seq_args,
2240a9e2
TM		 1644 &data->o_res.seq_res,
1645 task) != 0)
1646 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1647
1648 /* Set the create mode (note dependency on the session type) */
1649 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1650 if (data->o_arg.open_flags & O_EXCL) {
1651 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1652 if (nfs4_has_persistent_session(clp))
1653 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1654 else if (clp->cl_mvops->minor_version > 0)
1655 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1656 }
6ee41268 1657 return;
652f89f6
TM		 1658unlock_no_action:
1659 rcu_read_unlock();
6ee41268
TM		 1660out_no_action:
1661 task->tk_action = NULL;
c8da19b9 1662out_wait:
b75ad4cd 1663 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1664}
1665
24ac23ab
TM		 1666static void nfs4_open_done(struct rpc_task *task, void *calldata)
1667{
1668 struct nfs4_opendata *data = calldata;
1da177e4 1669
24ac23ab 1670 data->rpc_status = task->tk_status;
d898528c 1671
14516c3a
TM		 1672 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1673 return;
d898528c 1674
24ac23ab 1675 if (task->tk_status == 0) {
807d66d8
TM		 1676 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1677 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1678 case S_IFREG:
1679 break;
1680 case S_IFLNK:
24ac23ab 1681 data->rpc_status = -ELOOP;
6f926b5b
TM		 1682 break;
1683 case S_IFDIR:
24ac23ab 1684 data->rpc_status = -EISDIR;
6f926b5b
TM		 1685 break;
1686 default:
24ac23ab 1687 data->rpc_status = -ENOTDIR;
807d66d8 1688 }
6f926b5b 1689 }
26e976a8 1690 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1691 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1692 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1693 }
3e309914 1694 data->rpc_done = 1;
24ac23ab 1695}
6f926b5b 1696
24ac23ab
TM		 1697static void nfs4_open_release(void *calldata)
1698{
1699 struct nfs4_opendata *data = calldata;
1700 struct nfs4_state *state = NULL;
1701
1702 /* If this request hasn't been cancelled, do nothing */
1703 if (data->cancelled == 0)
1704 goto out_free;
1705 /* In case of error, no cleanup! */
3e309914 1706 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1707 goto out_free;
1708 /* In case we need an open_confirm, no cleanup! */
1709 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1710 goto out_free;
24ac23ab 1711 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1712 if (!IS_ERR(state))
643168c2 1713 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1714out_free:
c6d00e63 1715 nfs4_opendata_put(data);
24ac23ab
TM		 1716}
1717
1718static const struct rpc_call_ops nfs4_open_ops = {
1719 .rpc_call_prepare = nfs4_open_prepare,
1720 .rpc_call_done = nfs4_open_done,
1721 .rpc_release = nfs4_open_release,
1722};
1723
b257957e 1724static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1725{
1726 struct inode *dir = data->dir->d_inode;
1727 struct nfs_server *server = NFS_SERVER(dir);
1728 struct nfs_openargs *o_arg = &data->o_arg;
1729 struct nfs_openres *o_res = &data->o_res;
1730 struct rpc_task *task;
5138fde0
TM		 1731 struct rpc_message msg = {
1732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1733 .rpc_argp = o_arg,
1734 .rpc_resp = o_res,
1735 .rpc_cred = data->owner->so_cred,
1736 };
c970aa85
TM		 1737 struct rpc_task_setup task_setup_data = {
1738 .rpc_client = server->client,
5138fde0 1739 .rpc_message = &msg,
c970aa85
TM		 1740 .callback_ops = &nfs4_open_ops,
1741 .callback_data = data,
101070ca 1742 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1743 .flags = RPC_TASK_ASYNC,
1744 };
24ac23ab
TM		 1745 int status;
1746
9d12b216 1747 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1748 kref_get(&data->kref);
3e309914
TM		 1749 data->rpc_done = 0;
1750 data->rpc_status = 0;
2ced46c2 1751 data->cancelled = 0;
bdeca1b7
TM		 1752 data->is_recover = 0;
1753 if (isrecover) {
8fe72bac 1754 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1755 data->is_recover = 1;
1756 }
c970aa85 1757 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1758 if (IS_ERR(task))
1759 return PTR_ERR(task);
1760 status = nfs4_wait_for_completion_rpc_task(task);
1761 if (status != 0) {
1762 data->cancelled = 1;
1763 smp_wmb();
1764 } else
1765 status = data->rpc_status;
1766 rpc_put_task(task);
1767
1768 return status;
1769}
1770
1771static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1772{
1773 struct inode *dir = data->dir->d_inode;
1774 struct nfs_openres *o_res = &data->o_res;
1775 int status;
1776
1777 status = nfs4_run_open_task(data, 1);
1778 if (status != 0 || !data->rpc_done)
1779 return status;
1780
6926afd1
TM		 1781 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1782
b257957e
AB		 1783 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1784 status = _nfs4_proc_open_confirm(data);
1785 if (status != 0)
1786 return status;
1787 }
1788
1789 return status;
1790}
1791
6168f62c
WAA		 1792static int nfs4_opendata_access(struct rpc_cred *cred,
1793 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1794 struct nfs4_state *state, fmode_t fmode,
1795 int openflags)
6168f62c
WAA		 1796{
1797 struct nfs_access_entry cache;
1798 u32 mask;
1799
1800 /* access call failed or for some reason the server doesn't
1801 * support any access modes -- defer access call until later */
1802 if (opendata->o_res.access_supported == 0)
1803 return 0;
1804
1805 mask = 0;
bbd3a8ee 1806 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1807 * write mode bits, but POSIX allows the creating process to write.
1808 * use openflags to check for exec, because fmode won't
1809 * always have FMODE_EXEC set when file open for exec. */
1810 if (openflags & __FMODE_EXEC) {
1811 /* ONLY check for exec rights */
1812 mask = MAY_EXEC;
1813 } else if (fmode & FMODE_READ)
1814 mask = MAY_READ;
6168f62c
WAA		 1815
1816 cache.cred = cred;
1817 cache.jiffies = jiffies;
1818 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1819 nfs_access_add_cache(state->inode, &cache);
1820
bbd3a8ee 1821 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1822 return 0;
1823
1824 /* even though OPEN succeeded, access is denied. Close the file */
1825 nfs4_close_state(state, fmode);
998f40b5 1826 return -EACCES;
6168f62c
WAA		 1827}
1828
b257957e
AB		 1829/*
1830 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1831 */
1832static int _nfs4_proc_open(struct nfs4_opendata *data)
1833{
1834 struct inode *dir = data->dir->d_inode;
1835 struct nfs_server *server = NFS_SERVER(dir);
1836 struct nfs_openargs *o_arg = &data->o_arg;
1837 struct nfs_openres *o_res = &data->o_res;
1838 int status;
1839
1840 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1841 if (!data->rpc_done)
1842 return status;
1843 if (status != 0) {
1844 if (status == -NFS4ERR_BADNAME &&
1845 !(o_arg->open_flags & O_CREAT))
1846 return -ENOENT;
24ac23ab 1847 return status;
08ef7bd3 1848 }
24ac23ab 1849
6926afd1
TM		 1850 nfs_fattr_map_and_free_names(server, &data->f_attr);
1851
90ff0c54 1852 if (o_arg->open_flags & O_CREAT)
56ae19f3 1853 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1854 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1855 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1856 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1857 status = _nfs4_proc_open_confirm(data);
1da177e4 1858 if (status != 0)
24ac23ab 1859 return status;
1da177e4
LT		 1860 }
1861 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1862 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1863 return 0;
1da177e4
LT		 1864}
1865
d83217c1
AA		 1866static int nfs4_recover_expired_lease(struct nfs_server *server)
1867{
1868 return nfs4_client_recover_expired_lease(server->nfs_client);
1869}
1870
1da177e4
LT		 1871/*
1872 * OPEN_EXPIRED:
1873 * reclaim state on the server after a network partition.
1874 * Assumes caller holds the appropriate lock
1875 */
539cd03a 1876static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1877{
e56e0b78 1878 struct nfs4_opendata *opendata;
864472e9 1879 int ret;
1da177e4 1880
4a1c0893 1881 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1882 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1883 if (IS_ERR(opendata))
1884 return PTR_ERR(opendata);
864472e9 1885 ret = nfs4_open_recover(opendata, state);
35d05778 1886 if (ret == -ESTALE)
3d4ff43d 1887 d_drop(ctx->dentry);
c6d00e63 1888 nfs4_opendata_put(opendata);
864472e9 1889 return ret;
1da177e4
LT		 1890}
1891
a9ed2e25 1892static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1893{
539cd03a 1894 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1895 struct nfs4_exception exception = { };
1896 int err;
1897
1898 do {
539cd03a 1899 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1900 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1901 continue;
a9ed2e25
TM		 1902 switch (err) {
1903 default:
1904 goto out;
1905 case -NFS4ERR_GRACE:
1906 case -NFS4ERR_DELAY:
1907 nfs4_handle_exception(server, err, &exception);
1908 err = 0;
1909 }
202b50dc 1910 } while (exception.retry);
a9ed2e25 1911out:
202b50dc
TM		 1912 return err;
1913}
1914
1da177e4
LT		 1915static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1916{
1da177e4 1917 struct nfs_open_context *ctx;
864472e9 1918 int ret;
1da177e4 1919
864472e9
TM		 1920 ctx = nfs4_state_find_open_context(state);
1921 if (IS_ERR(ctx))
91876b13 1922 return -EAGAIN;
539cd03a 1923 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1924 put_nfs_open_context(ctx);
1925 return ret;
1da177e4
LT		 1926}
1927
f062eb6c 1928#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1929static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1930{
f062eb6c 1931 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1932 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1933 struct nfs_delegation *delegation;
1934 struct rpc_cred *cred = NULL;
1935 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1936
1937 /* If a state reset has been done, test_stateid is unneeded */
1938 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1939 return;
1940
ab7cb0df
TM		 1941 /* Get the delegation credential for use by test/free_stateid */
1942 rcu_read_lock();
1943 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1944 if (delegation != NULL &&
1945 nfs4_stateid_match(&delegation->stateid, stateid)) {
1946 cred = get_rpccred(delegation->cred);
1947 rcu_read_unlock();
1948 status = nfs41_test_stateid(server, stateid, cred);
1949 } else
1950 rcu_read_unlock();
1951
3e60ffdd
CL		 1952 if (status != NFS_OK) {
1953 /* Free the stateid unless the server explicitly
1954 * informs us the stateid is unrecognized. */
1955 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1956 nfs41_free_stateid(server, stateid, cred);
6938867e 1957 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1958
6938867e
BS		 1959 write_seqlock(&state->seqlock);
1960 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1961 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1962 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1963 }
ab7cb0df
TM		 1964
1965 if (cred != NULL)
1966 put_rpccred(cred);
3e60ffdd
CL		 1967}
1968
1969/**
1970 * nfs41_check_open_stateid - possibly free an open stateid
1971 *
1972 * @state: NFSv4 state for an inode
1973 *
1974 * Returns NFS_OK if recovery for this stateid is now finished.
1975 * Otherwise a negative NFS4ERR value is returned.
1976 */
1977static int nfs41_check_open_stateid(struct nfs4_state *state)
1978{
1979 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1980 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1981 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1982 int status;
1983
1984 /* If a state reset has been done, test_stateid is unneeded */
1985 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1986 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1987 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1988 return -NFS4ERR_BAD_STATEID;
1989
ab7cb0df 1990 status = nfs41_test_stateid(server, stateid, cred);
3e60ffdd
CL		 1991 if (status != NFS_OK) {
1992 /* Free the stateid unless the server explicitly
1993 * informs us the stateid is unrecognized. */
1994 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1995 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 1996
1997 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1998 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1999 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2000 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2001 }
2002 return status;
2003}
2004
2005static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2006{
eb64cf96 2007 int status;
b01dd1d8 2008
3e60ffdd
CL		 2009 nfs41_clear_delegation_stateid(state);
2010 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2011 if (status != NFS_OK)
2012 status = nfs4_open_expired(sp, state);
2013 return status;
f062eb6c
BS		 2014}
2015#endif
2016
aa53ed54
JL		 2017/*
2018 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2019 * fields corresponding to attributes that were used to store the verifier.
2020 * Make sure we clobber those fields in the later setattr call
2021 */
2022static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2023{
2024 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2025 !(sattr->ia_valid & ATTR_ATIME_SET))
2026 sattr->ia_valid |= ATTR_ATIME;
2027
2028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2029 !(sattr->ia_valid & ATTR_MTIME_SET))
2030 sattr->ia_valid |= ATTR_MTIME;
2031}
2032
c21443c2
TM		 2033static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2034 fmode_t fmode,
2035 int flags,
3efb9722 2036 struct nfs_open_context *ctx)
c21443c2
TM		 2037{
2038 struct nfs4_state_owner *sp = opendata->owner;
2039 struct nfs_server *server = sp->so_server;
275bb307 2040 struct dentry *dentry;
c21443c2
TM		 2041 struct nfs4_state *state;
2042 unsigned int seq;
2043 int ret;
2044
2045 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2046
2047 ret = _nfs4_proc_open(opendata);
2048 if (ret != 0)
2049 goto out;
2050
2051 state = nfs4_opendata_to_nfs4_state(opendata);
2052 ret = PTR_ERR(state);
2053 if (IS_ERR(state))
2054 goto out;
2055 if (server->caps & NFS_CAP_POSIX_LOCK)
2056 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2057
275bb307
TM		 2058 dentry = opendata->dentry;
2059 if (dentry->d_inode == NULL) {
2060 /* FIXME: Is this d_drop() ever needed? */
2061 d_drop(dentry);
2062 dentry = d_add_unique(dentry, igrab(state->inode));
2063 if (dentry == NULL) {
2064 dentry = opendata->dentry;
2065 } else if (dentry != ctx->dentry) {
2066 dput(ctx->dentry);
2067 ctx->dentry = dget(dentry);
2068 }
2069 nfs_set_verifier(dentry,
2070 nfs_save_change_attribute(opendata->dir->d_inode));
2071 }
2072
c21443c2
TM		 2073 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2074 if (ret != 0)
2075 goto out;
2076
3efb9722 2077 ctx->state = state;
c45ffdd2
TM		 2078 if (dentry->d_inode == state->inode) {
2079 nfs_inode_attach_open_context(ctx);
2080 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2081 nfs4_schedule_stateid_recovery(server, state);
2082 }
c21443c2
TM		 2083out:
2084 return ret;
2085}
2086
1da177e4 2087/*
24ac23ab 2088 * Returns a referenced nfs4_state
1da177e4 2089 */
82be417a 2090static int _nfs4_do_open(struct inode *dir,
4197a055 2091 struct nfs_open_context *ctx,
82be417a
AA		 2092 int flags,
2093 struct iattr *sattr,
959d921f 2094 struct nfs4_label *label)
1da177e4
LT		 2095{
2096 struct nfs4_state_owner *sp;
2097 struct nfs4_state *state = NULL;
2098 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2099 struct nfs4_opendata *opendata;
4197a055
TM		 2100 struct dentry *dentry = ctx->dentry;
2101 struct rpc_cred *cred = ctx->cred;
2102 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2103 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2104 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2105 struct nfs4_label *olabel = NULL;
aac00a8d 2106 int status;
1da177e4
LT		 2107
2108 /* Protect against reboot recovery conflicts */
1da177e4 2109 status = -ENOMEM;
d1e284d5
TM		 2110 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2111 if (sp == NULL) {
1da177e4
LT		 2112 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2113 goto out_err;
2114 }
58d9714a
TM		 2115 status = nfs4_recover_expired_lease(server);
2116 if (status != 0)
b4454fe1 2117 goto err_put_state_owner;
82a2c1b7
AV		 2118 if (dentry->d_inode != NULL)
2119 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2120 status = -ENOMEM;
49f9a0fa
TM		 2121 if (dentry->d_inode)
2122 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2123 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2124 label, claim, GFP_KERNEL);
e56e0b78 2125 if (opendata == NULL)
95d35cb4 2126 goto err_put_state_owner;
1da177e4 2127
14c43f76
DQ		 2128 if (label) {
2129 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2130 if (IS_ERR(olabel)) {
2131 status = PTR_ERR(olabel);
2132 goto err_opendata_put;
2133 }
2134 }
2135
82be417a
AA		 2136 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2137 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2138 if (!opendata->f_attr.mdsthreshold)
14c43f76 2139 goto err_free_label;
1549210f 2140 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2141 }
82a2c1b7
AV		 2142 if (dentry->d_inode != NULL)
2143 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2144
3efb9722 2145 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2146 if (status != 0)
14c43f76 2147 goto err_free_label;
3efb9722 2148 state = ctx->state;
6168f62c 2149
549b19cc
TM		 2150 if ((opendata->o_arg.open_flags & O_EXCL) &&
2151 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2152 nfs4_exclusive_attrset(opendata, sattr);
2153
2154 nfs_fattr_init(opendata->o_res.f_attr);
2155 status = nfs4_do_setattr(state->inode, cred,
2156 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2157 state, label, olabel);
2158 if (status == 0) {
0ab64e0e 2159 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2160 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2161 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2162 }
0ab64e0e 2163 }
82be417a
AA		 2164
2165 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2166 *ctx_th = opendata->f_attr.mdsthreshold;
2167 else
2168 kfree(opendata->f_attr.mdsthreshold);
2169 opendata->f_attr.mdsthreshold = NULL;
2170
14c43f76
DQ		 2171 nfs4_label_free(olabel);
2172
c6d00e63 2173 nfs4_opendata_put(opendata);
1da177e4 2174 nfs4_put_state_owner(sp);
1da177e4 2175 return 0;
14c43f76
DQ		 2176err_free_label:
2177 nfs4_label_free(olabel);
c6d00e63 2178err_opendata_put:
82be417a 2179 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2180 nfs4_opendata_put(opendata);
e56e0b78
TM		 2181err_put_state_owner:
2182 nfs4_put_state_owner(sp);
1da177e4 2183out_err:
1da177e4
LT		 2184 return status;
2185}
2186
2187
82be417a 2188static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2189 struct nfs_open_context *ctx,
82be417a
AA		 2190 int flags,
2191 struct iattr *sattr,
959d921f 2192 struct nfs4_label *label)
1da177e4 2193{
49f9a0fa 2194 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2195 struct nfs4_exception exception = { };
2196 struct nfs4_state *res;
2197 int status;
2198
2199 do {
959d921f 2200 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2201 res = ctx->state;
1da177e4
LT		 2202 if (status == 0)
2203 break;
2204 /* NOTE: BAD_SEQID means the server and client disagree about the
2205 * book-keeping w.r.t. state-changing operations
2206 * (OPEN/CLOSE/LOCK/LOCKU...)
2207 * It is actually a sign of a bug on the client or on the server.
2208 *
2209 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2210 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2211 * have unhashed the old state_owner for us, and that we can
2212 * therefore safely retry using a new one. We should still warn
2213 * the user though...
2214 */
2215 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2216 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2217 " returned a bad sequence-id error!\n",
2218 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2219 exception.retry = 1;
2220 continue;
2221 }
550f5747
TM		 2222 /*
2223 * BAD_STATEID on OPEN means that the server cancelled our
2224 * state before it received the OPEN_CONFIRM.
2225 * Recover by retrying the request as per the discussion
2226 * on Page 181 of RFC3530.
2227 */
2228 if (status == -NFS4ERR_BAD_STATEID) {
2229 exception.retry = 1;
2230 continue;
2231 }
aac00a8d
TM		 2232 if (status == -EAGAIN) {
2233 /* We must have found a delegation */
2234 exception.retry = 1;
2235 continue;
2236 }
49f9a0fa
TM		 2237 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2238 continue;
2239 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2240 status, &exception));
2241 } while (exception.retry);
2242 return res;
2243}
2244
659bfcd6
TM		 2245static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2246 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2247 struct nfs4_state *state, struct nfs4_label *ilabel,
2248 struct nfs4_label *olabel)
1da177e4 2249{
3e4f6290 2250 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2251 struct nfs_setattrargs arg = {
3e4f6290 2252 .fh = NFS_FH(inode),
1da177e4
LT		 2253 .iap = sattr,
2254 .server = server,
2255 .bitmask = server->attr_bitmask,
1775fd3e 2256 .label = ilabel,
1da177e4
LT		 2257 };
2258 struct nfs_setattrres res = {
2259 .fattr = fattr,
1775fd3e 2260 .label = olabel,
1da177e4
LT		 2261 .server = server,
2262 };
2263 struct rpc_message msg = {
659bfcd6
TM		 2264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2265 .rpc_argp = &arg,
2266 .rpc_resp = &res,
2267 .rpc_cred = cred,
1da177e4 2268 };
26e976a8 2269 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2270 fmode_t fmode;
2271 bool truncate;
65e4308d 2272 int status;
1da177e4 2273
aa9c2669
DQ		 2274 arg.bitmask = nfs4_bitmask(server, ilabel);
2275 if (ilabel)
2276 arg.bitmask = nfs4_bitmask(server, olabel);
2277
0e574af1 2278 nfs_fattr_init(fattr);
1da177e4 2279
ee3ae84e
TM		 2280 /* Servers should only apply open mode checks for file size changes */
2281 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2282 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2283
2284 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2285 /* Use that stateid */
2286 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2287 struct nfs_lockowner lockowner = {
2288 .l_owner = current->files,
2289 .l_pid = current->tgid,
2290 };
4fc8796d 2291 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2292 &lockowner);
08e9eac4 2293 } else
f597c537 2294 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2295
7c513058 2296 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2297 if (status == 0 && state != NULL)
2298 renew_lease(server, timestamp);
65e4308d 2299 return status;
1da177e4
LT		 2300}
2301
659bfcd6
TM		 2302static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2303 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2304 struct nfs4_state *state, struct nfs4_label *ilabel,
2305 struct nfs4_label *olabel)
1da177e4 2306{
3e4f6290 2307 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2308 struct nfs4_exception exception = {
2309 .state = state,
3114ea7a 2310 .inode = inode,
a1d0b5ee 2311 };
1da177e4
LT		 2312 int err;
2313 do {
1775fd3e 2314 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2315 switch (err) {
2316 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2317 if (!(sattr->ia_valid & ATTR_SIZE)) {
2318 pr_warn_once("NFSv4: server %s is incorrectly "
2319 "applying open mode checks to "
2320 "a SETATTR that is not "
2321 "changing file size.\n",
2322 server->nfs_client->cl_hostname);
2323 }
451146be
TM		 2324 if (state && !(state->state & FMODE_WRITE)) {
2325 err = -EBADF;
2326 if (sattr->ia_valid & ATTR_OPEN)
2327 err = -EACCES;
2328 goto out;
2329 }
2330 }
2331 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2332 } while (exception.retry);
451146be 2333out:
1da177e4
LT		 2334 return err;
2335}
2336
2337struct nfs4_closedata {
2338 struct inode *inode;
2339 struct nfs4_state *state;
2340 struct nfs_closeargs arg;
2341 struct nfs_closeres res;
516a6af6 2342 struct nfs_fattr fattr;
26e976a8 2343 unsigned long timestamp;
f7e8917a
FI		 2344 bool roc;
2345 u32 roc_barrier;
1da177e4
LT		 2346};
2347
963d8fe5 2348static void nfs4_free_closedata(void *data)
9512135d 2349{
963d8fe5
TM		 2350 struct nfs4_closedata *calldata = data;
2351 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2352 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2353
f7e8917a
FI		 2354 if (calldata->roc)
2355 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2356 nfs4_put_open_state(calldata->state);
2357 nfs_free_seqid(calldata->arg.seqid);
9512135d 2358 nfs4_put_state_owner(sp);
322b2b90 2359 nfs_sb_deactive(sb);
9512135d
TM		 2360 kfree(calldata);
2361}
2362
88069f77
TM		 2363static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2364 fmode_t fmode)
2365{
2366 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2367 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2368 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2369 case FMODE_WRITE:
88069f77 2370 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2371 break;
2372 case FMODE_READ:
88069f77 2373 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2374 break;
2375 case 0:
2376 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2377 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2378 clear_bit(NFS_OPEN_STATE, &state->flags);
2379 }
88069f77
TM		 2380 spin_unlock(&state->owner->so_lock);
2381}
2382
963d8fe5 2383static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2384{
963d8fe5 2385 struct nfs4_closedata *calldata = data;
1da177e4 2386 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2387 struct nfs_server *server = NFS_SERVER(calldata->inode);
2388
a3ca5651 2389 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2390 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2391 return;
1da177e4
LT		 2392 /* hmm. we are done with the inode, and in the process of freeing
2393 * the state_owner. we keep this around to process errors
2394 */
1da177e4
LT		 2395 switch (task->tk_status) {
2396 case 0:
f7e8917a
FI		 2397 if (calldata->roc)
2398 pnfs_roc_set_barrier(state->inode,
2399 calldata->roc_barrier);
45328c35 2400 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2401 renew_lease(server, calldata->timestamp);
88069f77
TM		 2402 nfs4_close_clear_stateid_flags(state,
2403 calldata->arg.fmode);
1da177e4
LT		 2404 break;
2405 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2406 case -NFS4ERR_OLD_STATEID:
2407 case -NFS4ERR_BAD_STATEID:
1da177e4 2408 case -NFS4ERR_EXPIRED:
dc0b027d 2409 if (calldata->arg.fmode == 0)
9e33bed5 2410 break;
1da177e4 2411 default:
72211dbe
TM		 2412 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2413 rpc_restart_call_prepare(task);
1da177e4 2414 }
72211dbe 2415 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2416 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2417 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2418}
2419
4ce70ada 2420static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2421{
4ce70ada 2422 struct nfs4_closedata *calldata = data;
9512135d 2423 struct nfs4_state *state = calldata->state;
7fdab069 2424 struct inode *inode = calldata->inode;
88069f77 2425 int call_close = 0;
9512135d 2426
a3ca5651 2427 dprintk("%s: begin!\n", __func__);
963d8fe5 2428 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2429 goto out_wait;
003707c7 2430
88069f77
TM		 2431 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2432 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2433 spin_lock(&state->owner->so_lock);
003707c7 2434 /* Calculate the change in open mode */
e7616923 2435 if (state->n_rdwr == 0) {
003707c7 2436 if (state->n_rdonly == 0) {
88069f77
TM		 2437 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2438 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2439 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2440 }
2441 if (state->n_wronly == 0) {
88069f77
TM		 2442 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2443 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2444 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2445 }
e7616923 2446 }
5d422301
TM		 2447 if (!nfs4_valid_open_stateid(state))
2448 call_close = 0;
4cecb76f 2449 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2450
2451 if (!call_close) {
963d8fe5 2452 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2453 goto out_no_action;
9512135d 2454 }
88069f77 2455
f7e8917a 2456 if (calldata->arg.fmode == 0) {
88069f77 2457 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2458 if (calldata->roc &&
b9536ad5
AA		 2459 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2460 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2461 goto out_wait;
b9536ad5 2462 }
f7e8917a 2463 }
88069f77 2464
516a6af6 2465 nfs_fattr_init(calldata->res.fattr);
26e976a8 2466 calldata->timestamp = jiffies;
7fdab069 2467 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2468 &calldata->arg.seq_args,
2469 &calldata->res.seq_res,
2240a9e2
TM		 2470 task) != 0)
2471 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2472 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2473 return;
2474out_no_action:
2475 task->tk_action = NULL;
2476out_wait:
2477 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2478}
2479
963d8fe5 2480static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2481 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2482 .rpc_call_done = nfs4_close_done,
2483 .rpc_release = nfs4_free_closedata,
2484};
2485
1da177e4
LT		 2486/*
2487 * It is possible for data to be read/written from a mem-mapped file
2488 * after the sys_close call (which hits the vfs layer as a flush).
2489 * This means that we can't safely call nfsv4 close on a file until
2490 * the inode is cleared. This in turn means that we are not good
2491 * NFSv4 citizens - we do not indicate to the server to update the file's
2492 * share state even when we are done with one of the three share
2493 * stateid's in the inode.
2494 *
2495 * NOTE: Caller must be holding the sp->so_owner semaphore!
2496 */
1f7977c1 2497int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2498{
4a35bd41 2499 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2500 struct nfs4_closedata *calldata;
b39e625b
TM		 2501 struct nfs4_state_owner *sp = state->owner;
2502 struct rpc_task *task;
5138fde0
TM		 2503 struct rpc_message msg = {
2504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2505 .rpc_cred = state->owner->so_cred,
2506 };
c970aa85
TM		 2507 struct rpc_task_setup task_setup_data = {
2508 .rpc_client = server->client,
5138fde0 2509 .rpc_message = &msg,
c970aa85 2510 .callback_ops = &nfs4_close_ops,
101070ca 2511 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2512 .flags = RPC_TASK_ASYNC,
2513 };
9512135d 2514 int status = -ENOMEM;
1da177e4 2515
8535b2be 2516 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2517 if (calldata == NULL)
9512135d 2518 goto out;
9d12b216 2519 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2520 calldata->inode = state->inode;
1da177e4 2521 calldata->state = state;
4a35bd41 2522 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2523 calldata->arg.stateid = &state->open_stateid;
1da177e4 2524 /* Serialization for the sequence id */
8535b2be 2525 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2526 if (calldata->arg.seqid == NULL)
2527 goto out_free_calldata;
dc0b027d 2528 calldata->arg.fmode = 0;
a65318bf 2529 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2530 calldata->res.fattr = &calldata->fattr;
c1d51931 2531 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2532 calldata->res.server = server;
1f7977c1 2533 calldata->roc = pnfs_roc(state->inode);
643168c2 2534 nfs_sb_active(calldata->inode->i_sb);
9512135d 2535
1174dd1f
TM		 2536 msg.rpc_argp = &calldata->arg;
2537 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2538 task_setup_data.callback_data = calldata;
2539 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2540 if (IS_ERR(task))
2541 return PTR_ERR(task);
a49c3c77
TM		 2542 status = 0;
2543 if (wait)
2544 status = rpc_wait_for_completion_task(task);
b39e625b 2545 rpc_put_task(task);
a49c3c77 2546 return status;
9512135d
TM		 2547out_free_calldata:
2548 kfree(calldata);
2549out:
b39e625b
TM		 2550 nfs4_put_open_state(state);
2551 nfs4_put_state_owner(sp);
9512135d 2552 return status;
1da177e4
LT		 2553}
2554
2b484297 2555static struct inode *
cd9a1c0e 2556nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2557{
1da177e4 2558 struct nfs4_state *state;
aa9c2669
DQ		 2559 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2560
2561 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2562
565277f6 2563 /* Protect against concurrent sillydeletes */
959d921f 2564 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2565
2566 nfs4_label_release_security(label);
2567
f46e0bd3
TM		 2568 if (IS_ERR(state))
2569 return ERR_CAST(state);
275bb307 2570 return state->inode;
1da177e4
LT		 2571}
2572
1185a552 2573static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2574{
2575 if (ctx->state == NULL)
2576 return;
2577 if (is_sync)
643168c2 2578 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2579 else
643168c2 2580 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2581}
1da177e4
LT		 2582
2583static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2584{
43652ad5
BH		 2585 struct nfs4_server_caps_arg args = {
2586 .fhandle = fhandle,
2587 };
1da177e4
LT		 2588 struct nfs4_server_caps_res res = {};
2589 struct rpc_message msg = {
2590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2591 .rpc_argp = &args,
1da177e4
LT		 2592 .rpc_resp = &res,
2593 };
2594 int status;
2595
7c513058 2596 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2597 if (status == 0) {
2598 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2599 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2600 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2601 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2602 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2603 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2604 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2605 server->caps |= NFS_CAP_ACLS;
2606 if (res.has_links != 0)
2607 server->caps |= NFS_CAP_HARDLINKS;
2608 if (res.has_symlinks != 0)
2609 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2610 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2611 server->caps |= NFS_CAP_FILEID;
2612 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2613 server->caps |= NFS_CAP_MODE;
2614 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2615 server->caps |= NFS_CAP_NLINK;
2616 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2617 server->caps |= NFS_CAP_OWNER;
2618 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2619 server->caps |= NFS_CAP_OWNER_GROUP;
2620 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2621 server->caps |= NFS_CAP_ATIME;
2622 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2623 server->caps |= NFS_CAP_CTIME;
2624 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2625 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2626#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2627 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2628 server->caps |= NFS_CAP_SECURITY_LABEL;
2629#endif
2630 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2631 sizeof(server->attr_bitmask));
62ab460c 2632
aa9c2669
DQ		 2633 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2634 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2635 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2636 }
a65318bf
TM		 2637 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2638 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2639 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2640 server->acl_bitmask = res.acl_bitmask;
264e6351 2641 server->fh_expire_type = res.fh_expire_type;
1da177e4 2642 }
cccef3b9 2643
1da177e4
LT		 2644 return status;
2645}
2646
55a97593 2647int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2648{
2649 struct nfs4_exception exception = { };
2650 int err;
2651 do {
2652 err = nfs4_handle_exception(server,
2653 _nfs4_server_capabilities(server, fhandle),
2654 &exception);
2655 } while (exception.retry);
2656 return err;
2657}
2658
2659static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2660 struct nfs_fsinfo *info)
2661{
aa9c2669 2662 u32 bitmask[3];
1da177e4 2663 struct nfs4_lookup_root_arg args = {
aa9c2669 2664 .bitmask = bitmask,
1da177e4
LT		 2665 };
2666 struct nfs4_lookup_res res = {
2667 .server = server,
0e574af1 2668 .fattr = info->fattr,
1da177e4
LT		 2669 .fh = fhandle,
2670 };
2671 struct rpc_message msg = {
2672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2673 .rpc_argp = &args,
2674 .rpc_resp = &res,
2675 };
008f55d0 2676
aa9c2669
DQ		 2677 bitmask[0] = nfs4_fattr_bitmap[0];
2678 bitmask[1] = nfs4_fattr_bitmap[1];
2679 /*
2680 * Process the label in the upcoming getfattr
2681 */
2682 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2683
0e574af1 2684 nfs_fattr_init(info->fattr);
7c513058 2685 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2686}
2687
2688static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2689 struct nfs_fsinfo *info)
2690{
2691 struct nfs4_exception exception = { };
2692 int err;
2693 do {
fb8a5ba8
BS		 2694 err = _nfs4_lookup_root(server, fhandle, info);
2695 switch (err) {
2696 case 0:
2697 case -NFS4ERR_WRONGSEC:
05e9cfb4 2698 goto out;
fb8a5ba8
BS		 2699 default:
2700 err = nfs4_handle_exception(server, err, &exception);
2701 }
1da177e4 2702 } while (exception.retry);
05e9cfb4 2703out:
1da177e4
LT		 2704 return err;
2705}
2706
8f70e95f
BS		 2707static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2708 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2709{
2710 struct rpc_auth *auth;
2711 int ret;
2712
2713 auth = rpcauth_create(flavor, server->client);
e8d920c5 2714 if (IS_ERR(auth)) {
75bc8821 2715 ret = -EACCES;
8f70e95f
BS		 2716 goto out;
2717 }
2718 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2719out:
2720 return ret;
2721}
2722
9a744ba3
CL		 2723/*
2724 * Retry pseudoroot lookup with various security flavors. We do this when:
2725 *
2726 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2727 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2728 *
2729 * Returns zero on success, or a negative NFS4ERR value, or a
2730 * negative errno value.
2731 */
801a16dc 2732static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2733 struct nfs_fsinfo *info)
1da177e4 2734{
9a744ba3
CL		 2735 /* Per 3530bis 15.33.5 */
2736 static const rpc_authflavor_t flav_array[] = {
2737 RPC_AUTH_GSS_KRB5P,
2738 RPC_AUTH_GSS_KRB5I,
2739 RPC_AUTH_GSS_KRB5,
c4eafe11 2740 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2741 RPC_AUTH_NULL,
2742 };
2743 int status = -EPERM;
2744 size_t i;
6a1a1e34 2745
9a744ba3 2746 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2747 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2748 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2749 continue;
2750 break;
8f70e95f 2751 }
9a744ba3 2752
fb8a5ba8
BS		 2753 /*
2754 * -EACCESS could mean that the user doesn't have correct permissions
2755 * to access the mount. It could also mean that we tried to mount
2756 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2757 * existing mount programs don't handle -EACCES very well so it should
2758 * be mapped to -EPERM instead.
2759 */
2760 if (status == -EACCES)
2761 status = -EPERM;
801a16dc
BS		 2762 return status;
2763}
2764
2ed4b95b
CL		 2765static int nfs4_do_find_root_sec(struct nfs_server *server,
2766 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2767{
2768 int mv = server->nfs_client->cl_minorversion;
2769 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2770}
2771
2772/**
2773 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2774 * @server: initialized nfs_server handle
2775 * @fhandle: we fill in the pseudo-fs root file handle
2776 * @info: we fill in an FSINFO struct
2777 *
2778 * Returns zero on success, or a negative errno.
801a16dc 2779 */
3028eb2b
BS		 2780int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2781 struct nfs_fsinfo *info)
801a16dc 2782{
2ed4b95b
CL		 2783 int status;
2784
2785 status = nfs4_lookup_root(server, fhandle, info);
2786 if ((status == -NFS4ERR_WRONGSEC) &&
2787 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2788 status = nfs4_do_find_root_sec(server, fhandle, info);
2789
1da177e4
LT		 2790 if (status == 0)
2791 status = nfs4_server_capabilities(server, fhandle);
2792 if (status == 0)
2793 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2794
c12e87f4 2795 return nfs4_map_errors(status);
1da177e4
LT		 2796}
2797
bae36241
BS		 2798static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2799 struct nfs_fsinfo *info)
2800{
2801 int error;
2802 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2803 struct nfs4_label *label = NULL;
bae36241
BS		 2804
2805 error = nfs4_server_capabilities(server, mntfh);
2806 if (error < 0) {
2807 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2808 return error;
2809 }
2810
14c43f76
DQ		 2811 label = nfs4_label_alloc(server, GFP_KERNEL);
2812 if (IS_ERR(label))
2813 return PTR_ERR(label);
2814
1775fd3e 2815 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2816 if (error < 0) {
2817 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2818 goto err_free_label;
bae36241
BS		 2819 }
2820
2821 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2822 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2823 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2824
14c43f76
DQ		 2825err_free_label:
2826 nfs4_label_free(label);
2827
bae36241
BS		 2828 return error;
2829}
2830
6b97fd3d
MN		 2831/*
2832 * Get locations and (maybe) other attributes of a referral.
2833 * Note that we'll actually follow the referral later when
2834 * we detect fsid mismatch in inode revalidation
2835 */
f05d147f
BS		 2836static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2837 const struct qstr *name, struct nfs_fattr *fattr,
2838 struct nfs_fh *fhandle)
6b97fd3d
MN		 2839{
2840 int status = -ENOMEM;
2841 struct page *page = NULL;
2842 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2843
2844 page = alloc_page(GFP_KERNEL);
2845 if (page == NULL)
2846 goto out;
2847 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2848 if (locations == NULL)
2849 goto out;
2850
f05d147f 2851 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2852 if (status != 0)
2853 goto out;
2854 /* Make sure server returned a different fsid for the referral */
2855 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2856 dprintk("%s: server did not return a different fsid for"
2857 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2858 status = -EIO;
2859 goto out;
2860 }
533eb461
AA		 2861 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2862 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2863
533eb461 2864 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2865 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2866 memset(fhandle, 0, sizeof(struct nfs_fh));
2867out:
2868 if (page)
2869 __free_page(page);
5d7ca35a 2870 kfree(locations);
6b97fd3d
MN		 2871 return status;
2872}
2873
1775fd3e
DQ		 2874static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2875 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2876{
2877 struct nfs4_getattr_arg args = {
2878 .fh = fhandle,
2879 .bitmask = server->attr_bitmask,
2880 };
2881 struct nfs4_getattr_res res = {
2882 .fattr = fattr,
1775fd3e 2883 .label = label,
1da177e4
LT		 2884 .server = server,
2885 };
2886 struct rpc_message msg = {
2887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2888 .rpc_argp = &args,
2889 .rpc_resp = &res,
2890 };
aa9c2669
DQ		 2891
2892 args.bitmask = nfs4_bitmask(server, label);
2893
0e574af1 2894 nfs_fattr_init(fattr);
7c513058 2895 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2896}
2897
1775fd3e
DQ		 2898static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2899 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2900{
2901 struct nfs4_exception exception = { };
2902 int err;
2903 do {
2904 err = nfs4_handle_exception(server,
1775fd3e 2905 _nfs4_proc_getattr(server, fhandle, fattr, label),
1da177e4
LT		 2906 &exception);
2907 } while (exception.retry);
2908 return err;
2909}
2910
2911/*
2912 * The file is not closed if it is opened due to the a request to change
2913 * the size of the file. The open call will not be needed once the
2914 * VFS layer lookup-intents are implemented.
2915 *
2916 * Close is called when the inode is destroyed.
2917 * If we haven't opened the file for O_WRONLY, we
2918 * need to in the size_change case to obtain a stateid.
2919 *
2920 * Got race?
2921 * Because OPEN is always done by name in nfsv4, it is
2922 * possible that we opened a different file by the same
2923 * name. We can recognize this race condition, but we
2924 * can't do anything about it besides returning an error.
2925 *
2926 * This will be fixed with VFS changes (lookup-intent).
2927 */
2928static int
2929nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2930 struct iattr *sattr)
2931{
08e9eac4 2932 struct inode *inode = dentry->d_inode;
659bfcd6 2933 struct rpc_cred *cred = NULL;
d530838b 2934 struct nfs4_state *state = NULL;
14c43f76 2935 struct nfs4_label *label = NULL;
1da177e4
LT		 2936 int status;
2937
8a1636c4 2938 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2939 pnfs_commit_and_return_layout(inode);
8a1636c4 2940
0e574af1 2941 nfs_fattr_init(fattr);
1da177e4 2942
2669940d
AA		 2943 /* Deal with open(O_TRUNC) */
2944 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2945 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2946
2947 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2948 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2949 return 0;
2950
d530838b 2951 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2952 if (sattr->ia_valid & ATTR_FILE) {
2953 struct nfs_open_context *ctx;
2954
2955 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2956 if (ctx) {
2957 cred = ctx->cred;
2958 state = ctx->state;
2959 }
659bfcd6 2960 }
08e9eac4 2961
14c43f76
DQ		 2962 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2963 if (IS_ERR(label))
2964 return PTR_ERR(label);
2965
2966 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2967 if (status == 0) {
65e4308d 2968 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2969 nfs_setsecurity(inode, fattr, label);
2970 }
14c43f76 2971 nfs4_label_free(label);
1da177e4
LT		 2972 return status;
2973}
2974
0c2e53f1
TM		 2975static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2976 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2977 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2978{
0c2e53f1 2979 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2980 int status;
2981 struct nfs4_lookup_arg args = {
2982 .bitmask = server->attr_bitmask,
0c2e53f1 2983 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2984 .name = name,
2985 };
2986 struct nfs4_lookup_res res = {
2987 .server = server,
2988 .fattr = fattr,
aa9c2669 2989 .label = label,
2b3de441
DH		 2990 .fh = fhandle,
2991 };
2992 struct rpc_message msg = {
2993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2994 .rpc_argp = &args,
2995 .rpc_resp = &res,
2996 };
2997
aa9c2669
DQ		 2998 args.bitmask = nfs4_bitmask(server, label);
2999
2b3de441
DH		 3000 nfs_fattr_init(fattr);
3001
1da177e4 3002 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3003 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3004 dprintk("NFS reply lookup: %d\n", status);
3005 return status;
3006}
3007
72de53ec 3008static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3009{
7ebb9315 3010 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3011 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3012 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3013 fattr->nlink = 2;
3014}
3015
72de53ec
BS		 3016static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3017 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3018 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3019{
3020 struct nfs4_exception exception = { };
72de53ec 3021 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3022 int err;
3023 do {
1775fd3e 3024 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
72de53ec 3025 switch (err) {
08ef7bd3 3026 case -NFS4ERR_BADNAME:
72de53ec
BS		 3027 err = -ENOENT;
3028 goto out;
0c2e53f1 3029 case -NFS4ERR_MOVED:
f05d147f 3030 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3031 goto out;
0c2e53f1 3032 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3033 err = -EPERM;
3034 if (client != *clnt)
3035 goto out;
3036
3037 client = nfs4_create_sec_client(client, dir, name);
3038 if (IS_ERR(client))
3039 return PTR_ERR(client);
3040
3041 exception.retry = 1;
3042 break;
3043 default:
3044 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3045 }
1da177e4 3046 } while (exception.retry);
72de53ec
BS		 3047
3048out:
3049 if (err == 0)
3050 *clnt = client;
3051 else if (client != *clnt)
3052 rpc_shutdown_client(client);
3053
1da177e4
LT		 3054 return err;
3055}
3056
80a16b21 3057static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3058 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3059 struct nfs4_label *label)
72de53ec
BS		 3060{
3061 int status;
3062 struct rpc_clnt *client = NFS_CLIENT(dir);
3063
1775fd3e 3064 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3065 if (client != NFS_CLIENT(dir)) {
3066 rpc_shutdown_client(client);
3067 nfs_fixup_secinfo_attributes(fattr);
3068 }
3069 return status;
3070}
3071
f05d147f
BS		 3072struct rpc_clnt *
3073nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3074 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3075{
3076 int status;
3077 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3078
1775fd3e 3079 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3080 if (status < 0) {
3081 rpc_shutdown_client(client);
3082 return ERR_PTR(status);
3083 }
3084 return client;
3085}
3086
1da177e4
LT		 3087static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3088{
76b32999 3089 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3090 struct nfs4_accessargs args = {
3091 .fh = NFS_FH(inode),
a4980e78 3092 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3093 };
3094 struct nfs4_accessres res = {
3095 .server = server,
1da177e4 3096 };
1da177e4
LT		 3097 struct rpc_message msg = {
3098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3099 .rpc_argp = &args,
3100 .rpc_resp = &res,
3101 .rpc_cred = entry->cred,
3102 };
3103 int mode = entry->mask;
aa9c2669 3104 int status = 0;
1da177e4
LT		 3105
3106 /*
3107 * Determine which access bits we want to ask for...
3108 */
3109 if (mode & MAY_READ)
3110 args.access |= NFS4_ACCESS_READ;
3111 if (S_ISDIR(inode->i_mode)) {
3112 if (mode & MAY_WRITE)
3113 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3114 if (mode & MAY_EXEC)
3115 args.access |= NFS4_ACCESS_LOOKUP;
3116 } else {
3117 if (mode & MAY_WRITE)
3118 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3119 if (mode & MAY_EXEC)
3120 args.access |= NFS4_ACCESS_EXECUTE;
3121 }
c407d41a
TM		 3122
3123 res.fattr = nfs_alloc_fattr();
3124 if (res.fattr == NULL)
3125 return -ENOMEM;
3126
7c513058 3127 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3128 if (!status) {
6168f62c 3129 nfs_access_set_mask(entry, res.access);
c407d41a 3130 nfs_refresh_inode(inode, res.fattr);
1da177e4 3131 }
c407d41a 3132 nfs_free_fattr(res.fattr);
1da177e4
LT		 3133 return status;
3134}
3135
3136static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3137{
3138 struct nfs4_exception exception = { };
3139 int err;
3140 do {
3141 err = nfs4_handle_exception(NFS_SERVER(inode),
3142 _nfs4_proc_access(inode, entry),
3143 &exception);
3144 } while (exception.retry);
3145 return err;
3146}
3147
3148/*
3149 * TODO: For the time being, we don't try to get any attributes
3150 * along with any of the zero-copy operations READ, READDIR,
3151 * READLINK, WRITE.
3152 *
3153 * In the case of the first three, we want to put the GETATTR
3154 * after the read-type operation -- this is because it is hard
3155 * to predict the length of a GETATTR response in v4, and thus
3156 * align the READ data correctly. This means that the GETATTR
3157 * may end up partially falling into the page cache, and we should
3158 * shift it into the 'tail' of the xdr_buf before processing.
3159 * To do this efficiently, we need to know the total length
3160 * of data received, which doesn't seem to be available outside
3161 * of the RPC layer.
3162 *
3163 * In the case of WRITE, we also want to put the GETATTR after
3164 * the operation -- in this case because we want to make sure
140150db 3165 * we get the post-operation mtime and size.
1da177e4
LT		 3166 *
3167 * Both of these changes to the XDR layer would in fact be quite
3168 * minor, but I decided to leave them for a subsequent patch.
3169 */
3170static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3171 unsigned int pgbase, unsigned int pglen)
3172{
3173 struct nfs4_readlink args = {
3174 .fh = NFS_FH(inode),
3175 .pgbase = pgbase,
3176 .pglen = pglen,
3177 .pages = &page,
3178 };
f50c7000 3179 struct nfs4_readlink_res res;
1da177e4
LT		 3180 struct rpc_message msg = {
3181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3182 .rpc_argp = &args,
f50c7000 3183 .rpc_resp = &res,
1da177e4
LT		 3184 };
3185
7c513058 3186 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3187}
3188
3189static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3190 unsigned int pgbase, unsigned int pglen)
3191{
3192 struct nfs4_exception exception = { };
3193 int err;
3194 do {
3195 err = nfs4_handle_exception(NFS_SERVER(inode),
3196 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3197 &exception);
3198 } while (exception.retry);
3199 return err;
3200}
3201
1da177e4 3202/*
8867fe58 3203 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3204 */
1da177e4
LT		 3205static int
3206nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3207 int flags)
1da177e4 3208{
aa9c2669 3209 struct nfs4_label l, *ilabel = NULL;
8867fe58 3210 struct nfs_open_context *ctx;
1da177e4 3211 struct nfs4_state *state;
1da177e4
LT		 3212 int status = 0;
3213
8867fe58
MS		 3214 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3215 if (IS_ERR(ctx))
3216 return PTR_ERR(ctx);
3217
aa9c2669
DQ		 3218 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3219
a8a5da99 3220 sattr->ia_mode &= ~current_umask();
959d921f 3221 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3222 if (IS_ERR(state)) {
3223 status = PTR_ERR(state);
c0204fd2 3224 goto out;
1da177e4 3225 }
1da177e4 3226out:
aa9c2669 3227 nfs4_label_release_security(ilabel);
8867fe58 3228 put_nfs_open_context(ctx);
1da177e4
LT		 3229 return status;
3230}
3231
3232static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3233{
16e42959 3234 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3235 struct nfs_removeargs args = {
1da177e4 3236 .fh = NFS_FH(dir),
26fe5750 3237 .name = *name,
16e42959 3238 };
4fdc17b2 3239 struct nfs_removeres res = {
16e42959 3240 .server = server,
1da177e4 3241 };
1da177e4 3242 struct rpc_message msg = {
4fdc17b2
TM		 3243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3244 .rpc_argp = &args,
3245 .rpc_resp = &res,
1da177e4 3246 };
778d2817 3247 int status;
1da177e4 3248
7c513058 3249 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3250 if (status == 0)
16e42959 3251 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3252 return status;
3253}
3254
3255static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3256{
3257 struct nfs4_exception exception = { };
3258 int err;
3259 do {
3260 err = nfs4_handle_exception(NFS_SERVER(dir),
3261 _nfs4_proc_remove(dir, name),
3262 &exception);
3263 } while (exception.retry);
3264 return err;
3265}
3266
e4eff1a6 3267static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3268{
e4eff1a6
TM		 3269 struct nfs_server *server = NFS_SERVER(dir);
3270 struct nfs_removeargs *args = msg->rpc_argp;
3271 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3272
e4eff1a6 3273 res->server = server;
1da177e4 3274 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3275 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3276
3277 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3278}
3279
34e137cc
BS		 3280static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3281{
d9afbd1b
TM		 3282 nfs4_setup_sequence(NFS_SERVER(data->dir),
3283 &data->args.seq_args,
3284 &data->res.seq_res,
3285 task);
1da177e4
LT		 3286}
3287
e4eff1a6 3288static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3289{
e4eff1a6
TM		 3290 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3291
14516c3a
TM		 3292 if (!nfs4_sequence_done(task, &res->seq_res))
3293 return 0;
9e33bed5 3294 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3295 return 0;
3296 update_changeattr(dir, &res->cinfo);
e4eff1a6 3297 return 1;
1da177e4
LT		 3298}
3299
d3d4152a
JL		 3300static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3301{
3302 struct nfs_server *server = NFS_SERVER(dir);
3303 struct nfs_renameargs *arg = msg->rpc_argp;
3304 struct nfs_renameres *res = msg->rpc_resp;
3305
3306 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3307 res->server = server;
9d12b216 3308 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3309}
3310
c6bfa1a1
BS		 3311static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3312{
d9afbd1b
TM		 3313 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3314 &data->args.seq_args,
3315 &data->res.seq_res,
3316 task);
d3d4152a
JL		 3317}
3318
3319static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3320 struct inode *new_dir)
3321{
3322 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3323
3324 if (!nfs4_sequence_done(task, &res->seq_res))
3325 return 0;
3326 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3327 return 0;
3328
3329 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3330 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3331 return 1;
3332}
3333
1da177e4
LT		 3334static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3335 struct inode *new_dir, struct qstr *new_name)
3336{
6caf2c82 3337 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3338 struct nfs_renameargs arg = {
1da177e4
LT		 3339 .old_dir = NFS_FH(old_dir),
3340 .new_dir = NFS_FH(new_dir),
3341 .old_name = old_name,
3342 .new_name = new_name,
6caf2c82 3343 };
e8582a8b 3344 struct nfs_renameres res = {
6caf2c82 3345 .server = server,
1da177e4 3346 };
1da177e4
LT		 3347 struct rpc_message msg = {
3348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3349 .rpc_argp = &arg,
3350 .rpc_resp = &res,
3351 };
011fff72 3352 int status = -ENOMEM;
14c43f76 3353
7c513058 3354 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3355 if (!status) {
3356 update_changeattr(old_dir, &res.old_cinfo);
3357 update_changeattr(new_dir, &res.new_cinfo);
3358 }
3359 return status;
3360}
3361
3362static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3363 struct inode *new_dir, struct qstr *new_name)
3364{
3365 struct nfs4_exception exception = { };
3366 int err;
3367 do {
3368 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3369 _nfs4_proc_rename(old_dir, old_name,
3370 new_dir, new_name),
3371 &exception);
3372 } while (exception.retry);
3373 return err;
3374}
3375
3376static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3377{
91ba2eee 3378 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3379 struct nfs4_link_arg arg = {
3380 .fh = NFS_FH(inode),
3381 .dir_fh = NFS_FH(dir),
3382 .name = name,
91ba2eee
TM		 3383 .bitmask = server->attr_bitmask,
3384 };
91ba2eee
TM		 3385 struct nfs4_link_res res = {
3386 .server = server,
1775fd3e 3387 .label = NULL,
1da177e4 3388 };
1da177e4
LT		 3389 struct rpc_message msg = {
3390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3391 .rpc_argp = &arg,
91ba2eee 3392 .rpc_resp = &res,
1da177e4 3393 };
136f2627
TM		 3394 int status = -ENOMEM;
3395
3396 res.fattr = nfs_alloc_fattr();
778d2817 3397 if (res.fattr == NULL)
136f2627 3398 goto out;
1da177e4 3399
14c43f76
DQ		 3400 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3401 if (IS_ERR(res.label)) {
3402 status = PTR_ERR(res.label);
3403 goto out;
3404 }
aa9c2669 3405 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3406
7c513058 3407 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3408 if (!status) {
3409 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3410 status = nfs_post_op_update_inode(inode, res.fattr);
3411 if (!status)
3412 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3413 }
14c43f76
DQ		 3414
3415
3416 nfs4_label_free(res.label);
3417
136f2627 3418out:
136f2627 3419 nfs_free_fattr(res.fattr);
1da177e4
LT		 3420 return status;
3421}
3422
3423static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3424{
3425 struct nfs4_exception exception = { };
3426 int err;
3427 do {
3428 err = nfs4_handle_exception(NFS_SERVER(inode),
3429 _nfs4_proc_link(inode, dir, name),
3430 &exception);
3431 } while (exception.retry);
3432 return err;
3433}
3434
57dc9a57
TM		 3435struct nfs4_createdata {
3436 struct rpc_message msg;
3437 struct nfs4_create_arg arg;
3438 struct nfs4_create_res res;
3439 struct nfs_fh fh;
3440 struct nfs_fattr fattr;
1775fd3e 3441 struct nfs4_label *label;
57dc9a57
TM		 3442};
3443
3444static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3445 struct qstr *name, struct iattr *sattr, u32 ftype)
3446{
3447 struct nfs4_createdata *data;
3448
3449 data = kzalloc(sizeof(*data), GFP_KERNEL);
3450 if (data != NULL) {
3451 struct nfs_server *server = NFS_SERVER(dir);
3452
14c43f76
DQ		 3453 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3454 if (IS_ERR(data->label))
3455 goto out_free;
3456
57dc9a57
TM		 3457 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3458 data->msg.rpc_argp = &data->arg;
3459 data->msg.rpc_resp = &data->res;
3460 data->arg.dir_fh = NFS_FH(dir);
3461 data->arg.server = server;
3462 data->arg.name = name;
3463 data->arg.attrs = sattr;
3464 data->arg.ftype = ftype;
aa9c2669 3465 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3466 data->res.server = server;
3467 data->res.fh = &data->fh;
3468 data->res.fattr = &data->fattr;
1775fd3e 3469 data->res.label = data->label;
57dc9a57 3470 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3471 }
3472 return data;
14c43f76
DQ		 3473out_free:
3474 kfree(data);
3475 return NULL;
57dc9a57
TM		 3476}
3477
3478static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3479{
7c513058 3480 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3481 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3482 if (status == 0) {
3483 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3484 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3485 }
3486 return status;
3487}
3488
3489static void nfs4_free_createdata(struct nfs4_createdata *data)
3490{
14c43f76 3491 nfs4_label_free(data->label);
57dc9a57
TM		 3492 kfree(data);
3493}
3494
4f390c15 3495static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3496 struct page *page, unsigned int len, struct iattr *sattr,
3497 struct nfs4_label *label)
1da177e4 3498{
57dc9a57
TM		 3499 struct nfs4_createdata *data;
3500 int status = -ENAMETOOLONG;
1da177e4 3501
94a6d753 3502 if (len > NFS4_MAXPATHLEN)
57dc9a57 3503 goto out;
4f390c15 3504
57dc9a57
TM		 3505 status = -ENOMEM;
3506 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3507 if (data == NULL)
3508 goto out;
3509
3510 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3511 data->arg.u.symlink.pages = &page;
3512 data->arg.u.symlink.len = len;
1775fd3e 3513 data->arg.label = label;
1da177e4 3514
57dc9a57
TM		 3515 status = nfs4_do_create(dir, dentry, data);
3516
3517 nfs4_free_createdata(data);
3518out:
1da177e4
LT		 3519 return status;
3520}
3521
4f390c15 3522static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3523 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3524{
3525 struct nfs4_exception exception = { };
aa9c2669 3526 struct nfs4_label l, *label = NULL;
1da177e4 3527 int err;
aa9c2669
DQ		 3528
3529 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3530
1da177e4
LT		 3531 do {
3532 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753 3533 _nfs4_proc_symlink(dir, dentry, page,
1775fd3e 3534 len, sattr, label),
1da177e4
LT		 3535 &exception);
3536 } while (exception.retry);
aa9c2669
DQ		 3537
3538 nfs4_label_release_security(label);
1da177e4
LT		 3539 return err;
3540}
3541
3542static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3543 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3544{
57dc9a57
TM		 3545 struct nfs4_createdata *data;
3546 int status = -ENOMEM;
1da177e4 3547
57dc9a57
TM		 3548 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3549 if (data == NULL)
3550 goto out;
3551
1775fd3e 3552 data->arg.label = label;
57dc9a57
TM		 3553 status = nfs4_do_create(dir, dentry, data);
3554
3555 nfs4_free_createdata(data);
3556out:
1da177e4
LT		 3557 return status;
3558}
3559
3560static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3561 struct iattr *sattr)
3562{
3563 struct nfs4_exception exception = { };
aa9c2669 3564 struct nfs4_label l, *label = NULL;
1da177e4 3565 int err;
a8a5da99 3566
aa9c2669
DQ		 3567 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3568
a8a5da99 3569 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3570 do {
3571 err = nfs4_handle_exception(NFS_SERVER(dir),
1775fd3e 3572 _nfs4_proc_mkdir(dir, dentry, sattr, label),
1da177e4
LT		 3573 &exception);
3574 } while (exception.retry);
aa9c2669
DQ		 3575 nfs4_label_release_security(label);
3576
1da177e4
LT		 3577 return err;
3578}
3579
3580static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3581 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3582{
3583 struct inode *dir = dentry->d_inode;
3584 struct nfs4_readdir_arg args = {
3585 .fh = NFS_FH(dir),
56e4ebf8 3586 .pages = pages,
1da177e4
LT		 3587 .pgbase = 0,
3588 .count = count,
96d25e53 3589 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3590 .plus = plus,
1da177e4
LT		 3591 };
3592 struct nfs4_readdir_res res;
3593 struct rpc_message msg = {
3594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3595 .rpc_argp = &args,
3596 .rpc_resp = &res,
3597 .rpc_cred = cred,
3598 };
3599 int status;
3600
3110ff80 3601 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3602 dentry->d_parent->d_name.name,
3603 dentry->d_name.name,
3604 (unsigned long long)cookie);
c3f52af3 3605 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3606 res.pgbase = args.pgbase;
7c513058 3607 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3608 if (status >= 0) {
c3f52af3 3609 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3610 status += args.pgbase;
3611 }
c4812998
TM		 3612
3613 nfs_invalidate_atime(dir);
3614
3110ff80 3615 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3616 return status;
3617}
3618
3619static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3620 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3621{
3622 struct nfs4_exception exception = { };
3623 int err;
3624 do {
3625 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3626 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3627 pages, count, plus),
1da177e4
LT		 3628 &exception);
3629 } while (exception.retry);
3630 return err;
3631}
3632
3633static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3634 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3635{
57dc9a57
TM		 3636 struct nfs4_createdata *data;
3637 int mode = sattr->ia_mode;
3638 int status = -ENOMEM;
1da177e4 3639
57dc9a57
TM		 3640 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3641 if (data == NULL)
3642 goto out;
3643
1da177e4 3644 if (S_ISFIFO(mode))
57dc9a57 3645 data->arg.ftype = NF4FIFO;
1da177e4 3646 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3647 data->arg.ftype = NF4BLK;
3648 data->arg.u.device.specdata1 = MAJOR(rdev);
3649 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3650 }
3651 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3652 data->arg.ftype = NF4CHR;
3653 data->arg.u.device.specdata1 = MAJOR(rdev);
3654 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3655 } else if (!S_ISSOCK(mode)) {
3656 status = -EINVAL;
3657 goto out_free;
1da177e4 3658 }
1775fd3e 3659
aa9c2669 3660 data->arg.label = label;
57dc9a57 3661 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3662out_free:
57dc9a57
TM		 3663 nfs4_free_createdata(data);
3664out:
1da177e4
LT		 3665 return status;
3666}
3667
3668static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3669 struct iattr *sattr, dev_t rdev)
3670{
3671 struct nfs4_exception exception = { };
aa9c2669 3672 struct nfs4_label l, *label = NULL;
1da177e4 3673 int err;
a8a5da99 3674
aa9c2669
DQ		 3675 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3676
a8a5da99 3677 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3678 do {
3679 err = nfs4_handle_exception(NFS_SERVER(dir),
aa9c2669 3680 _nfs4_proc_mknod(dir, dentry, sattr, label, rdev),
1da177e4
LT		 3681 &exception);
3682 } while (exception.retry);
aa9c2669
DQ		 3683
3684 nfs4_label_release_security(label);
3685
1da177e4
LT		 3686 return err;
3687}
3688
3689static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3690 struct nfs_fsstat *fsstat)
3691{
3692 struct nfs4_statfs_arg args = {
3693 .fh = fhandle,
3694 .bitmask = server->attr_bitmask,
3695 };
24ad148a
BH		 3696 struct nfs4_statfs_res res = {
3697 .fsstat = fsstat,
3698 };
1da177e4
LT		 3699 struct rpc_message msg = {
3700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3701 .rpc_argp = &args,
24ad148a 3702 .rpc_resp = &res,
1da177e4
LT		 3703 };
3704
0e574af1 3705 nfs_fattr_init(fsstat->fattr);
7c513058 3706 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3707}
3708
3709static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3710{
3711 struct nfs4_exception exception = { };
3712 int err;
3713 do {
3714 err = nfs4_handle_exception(server,
3715 _nfs4_proc_statfs(server, fhandle, fsstat),
3716 &exception);
3717 } while (exception.retry);
3718 return err;
3719}
3720
3721static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3722 struct nfs_fsinfo *fsinfo)
3723{
3724 struct nfs4_fsinfo_arg args = {
3725 .fh = fhandle,
3726 .bitmask = server->attr_bitmask,
3727 };
3dda5e43
BH		 3728 struct nfs4_fsinfo_res res = {
3729 .fsinfo = fsinfo,
3730 };
1da177e4
LT		 3731 struct rpc_message msg = {
3732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3733 .rpc_argp = &args,
3dda5e43 3734 .rpc_resp = &res,
1da177e4
LT		 3735 };
3736
7c513058 3737 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3738}
3739
3740static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3741{
3742 struct nfs4_exception exception = { };
83ca7f5a 3743 unsigned long now = jiffies;
1da177e4
LT		 3744 int err;
3745
3746 do {
83ca7f5a
CL		 3747 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3748 if (err == 0) {
3749 struct nfs_client *clp = server->nfs_client;
3750
3751 spin_lock(&clp->cl_lock);
3752 clp->cl_lease_time = fsinfo->lease_time * HZ;
3753 clp->cl_last_renewal = now;
3754 spin_unlock(&clp->cl_lock);
3755 break;
3756 }
3757 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3758 } while (exception.retry);
3759 return err;
3760}
3761
3762static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3763{
e38eb650
BS		 3764 int error;
3765
0e574af1 3766 nfs_fattr_init(fsinfo->fattr);
e38eb650 3767 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3768 if (error == 0) {
3769 /* block layout checks this! */
3770 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3771 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3772 }
e38eb650
BS		 3773
3774 return error;
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_pathconf_arg args = {
3781 .fh = fhandle,
3782 .bitmask = server->attr_bitmask,
3783 };
d45b2989
BH		 3784 struct nfs4_pathconf_res res = {
3785 .pathconf = pathconf,
3786 };
1da177e4
LT		 3787 struct rpc_message msg = {
3788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3789 .rpc_argp = &args,
d45b2989 3790 .rpc_resp = &res,
1da177e4
LT		 3791 };
3792
3793 /* None of the pathconf attributes are mandatory to implement */
3794 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3795 memset(pathconf, 0, sizeof(*pathconf));
3796 return 0;
3797 }
3798
0e574af1 3799 nfs_fattr_init(pathconf->fattr);
7c513058 3800 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3801}
3802
3803static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3804 struct nfs_pathconf *pathconf)
3805{
3806 struct nfs4_exception exception = { };
3807 int err;
3808
3809 do {
3810 err = nfs4_handle_exception(server,
3811 _nfs4_proc_pathconf(server, fhandle, pathconf),
3812 &exception);
3813 } while (exception.retry);
3814 return err;
3815}
3816
5521abfd 3817int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3818 const struct nfs_open_context *ctx,
3819 const struct nfs_lock_context *l_ctx,
3820 fmode_t fmode)
3821{
3822 const struct nfs_lockowner *lockowner = NULL;
3823
3824 if (l_ctx != NULL)
3825 lockowner = &l_ctx->lockowner;
5521abfd 3826 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3827}
3828EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3829
5521abfd
TM		 3830static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3831 const struct nfs_open_context *ctx,
3832 const struct nfs_lock_context *l_ctx,
3833 fmode_t fmode)
3834{
3835 nfs4_stateid current_stateid;
3836
3837 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3838 return false;
3839 return nfs4_stateid_match(stateid, &current_stateid);
3840}
3841
3842static bool nfs4_error_stateid_expired(int err)
3843{
3844 switch (err) {
3845 case -NFS4ERR_DELEG_REVOKED:
3846 case -NFS4ERR_ADMIN_REVOKED:
3847 case -NFS4ERR_BAD_STATEID:
3848 case -NFS4ERR_STALE_STATEID:
3849 case -NFS4ERR_OLD_STATEID:
3850 case -NFS4ERR_OPENMODE:
3851 case -NFS4ERR_EXPIRED:
3852 return true;
3853 }
3854 return false;
3855}
3856
d20581aa
BH		 3857void __nfs4_read_done_cb(struct nfs_read_data *data)
3858{
cd841605 3859 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3860}
3861
cbdabc7f 3862static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3863{
cd841605 3864 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3865
9e33bed5 3866 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3867 rpc_restart_call_prepare(task);
ec06c096 3868 return -EAGAIN;
1da177e4 3869 }
8850df99 3870
d20581aa 3871 __nfs4_read_done_cb(data);
1da177e4 3872 if (task->tk_status > 0)
ec06c096
TM		 3873 renew_lease(server, data->timestamp);
3874 return 0;
1da177e4
LT		 3875}
3876
5521abfd
TM		 3877static bool nfs4_read_stateid_changed(struct rpc_task *task,
3878 struct nfs_readargs *args)
3879{
3880
3881 if (!nfs4_error_stateid_expired(task->tk_status) ||
3882 nfs4_stateid_is_current(&args->stateid,
3883 args->context,
3884 args->lock_context,
3885 FMODE_READ))
3886 return false;
3887 rpc_restart_call_prepare(task);
3888 return true;
3889}
3890
cbdabc7f
AA		 3891static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3892{
3893
3894 dprintk("--> %s\n", __func__);
3895
3896 if (!nfs4_sequence_done(task, &data->res.seq_res))
3897 return -EAGAIN;
5521abfd
TM		 3898 if (nfs4_read_stateid_changed(task, &data->args))
3899 return -EAGAIN;
d20581aa
BH		 3900 return data->read_done_cb ? data->read_done_cb(task, data) :
3901 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3902}
3903
bdc7f021 3904static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3905{
1da177e4 3906 data->timestamp = jiffies;
cbdabc7f 3907 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3908 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3909 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3910}
3911
ea7c3303
BS		 3912static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3913{
9b206149 3914 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3915 &data->args.seq_args,
3916 &data->res.seq_res,
9b206149
TM		 3917 task))
3918 return;
3919 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3920 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3921}
3922
b029bc9b 3923static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3924{
cd841605 3925 struct inode *inode = data->header->inode;
1da177e4 3926
9e33bed5 3927 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3928 rpc_restart_call_prepare(task);
788e7a89 3929 return -EAGAIN;
1da177e4 3930 }
4f9838c7 3931 if (task->tk_status >= 0) {
1da177e4 3932 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3933 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3934 }
788e7a89 3935 return 0;
1da177e4
LT		 3936}
3937
5521abfd
TM		 3938static bool nfs4_write_stateid_changed(struct rpc_task *task,
3939 struct nfs_writeargs *args)
3940{
3941
3942 if (!nfs4_error_stateid_expired(task->tk_status) ||
3943 nfs4_stateid_is_current(&args->stateid,
3944 args->context,
3945 args->lock_context,
3946 FMODE_WRITE))
3947 return false;
3948 rpc_restart_call_prepare(task);
3949 return true;
3950}
3951
b029bc9b
FI		 3952static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3953{
3954 if (!nfs4_sequence_done(task, &data->res.seq_res))
3955 return -EAGAIN;
5521abfd
TM		 3956 if (nfs4_write_stateid_changed(task, &data->args))
3957 return -EAGAIN;
d20581aa
BH		 3958 return data->write_done_cb ? data->write_done_cb(task, data) :
3959 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3960}
3961
5a37f851
TM		 3962static
3963bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3964{
5a37f851
TM		 3965 const struct nfs_pgio_header *hdr = data->header;
3966
3967 /* Don't request attributes for pNFS or O_DIRECT writes */
3968 if (data->ds_clp != NULL || hdr->dreq != NULL)
3969 return false;
3970 /* Otherwise, request attributes if and only if we don't hold
3971 * a delegation
3972 */
011e2a7f 3973 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3974}
a69aef14 3975
bdc7f021 3976static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3977{
cd841605 3978 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3979
5a37f851 3980 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3981 data->args.bitmask = NULL;
3982 data->res.fattr = NULL;
3983 } else
3984 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3985
b029bc9b
FI		 3986 if (!data->write_done_cb)
3987 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3988 data->res.server = server;
1da177e4
LT		 3989 data->timestamp = jiffies;
3990
bdc7f021 3991 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3992 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3993}
3994
c6cb80d0
BS		 3995static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3996{
9b206149 3997 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3998 &data->args.seq_args,
3999 &data->res.seq_res,
9b206149
TM		 4000 task))
4001 return;
4002 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4003 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4004}
4005
0b7c0153 4006static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4007{
d9afbd1b
TM		 4008 nfs4_setup_sequence(NFS_SERVER(data->inode),
4009 &data->args.seq_args,
4010 &data->res.seq_res,
4011 task);
1da177e4
LT		 4012}
4013
0b7c0153 4014static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4015{
1da177e4 4016 struct inode *inode = data->inode;
14516c3a 4017
9e33bed5 4018 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4019 rpc_restart_call_prepare(task);
788e7a89 4020 return -EAGAIN;
1da177e4 4021 }
788e7a89 4022 return 0;
1da177e4
LT		 4023}
4024
0b7c0153 4025static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4026{
4027 if (!nfs4_sequence_done(task, &data->res.seq_res))
4028 return -EAGAIN;
0b7c0153 4029 return data->commit_done_cb(task, data);
5f452431
FI		 4030}
4031
0b7c0153 4032static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4033{
788e7a89 4034 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4035
0b7c0153
FI		 4036 if (data->commit_done_cb == NULL)
4037 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4038 data->res.server = server;
bdc7f021 4039 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4040 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4041}
4042
9bc4e3ca
CL		 4043struct nfs4_renewdata {
4044 struct nfs_client *client;
4045 unsigned long timestamp;
4046};
4047
1da177e4
LT		 4048/*
4049 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4050 * standalone procedure for queueing an asynchronous RENEW.
4051 */
9bc4e3ca 4052static void nfs4_renew_release(void *calldata)
dc96aef9 4053{
9bc4e3ca
CL		 4054 struct nfs4_renewdata *data = calldata;
4055 struct nfs_client *clp = data->client;
dc96aef9 4056
0851de06
AB		 4057 if (atomic_read(&clp->cl_count) > 1)
4058 nfs4_schedule_state_renewal(clp);
4059 nfs_put_client(clp);
9bc4e3ca 4060 kfree(data);
dc96aef9
AB		 4061}
4062
9bc4e3ca 4063static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4064{
9bc4e3ca
CL		 4065 struct nfs4_renewdata *data = calldata;
4066 struct nfs_client *clp = data->client;
4067 unsigned long timestamp = data->timestamp;
1da177e4 4068
c6d01c6f 4069 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4070 if (task->tk_status < 0) {
95baa25c 4071 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4072 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4073 return;
4074 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4075 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4076 return;
4077 }
4078 nfs4_schedule_path_down_recovery(clp);
1da177e4 4079 }
452e9352 4080 do_renew_lease(clp, timestamp);
1da177e4
LT		 4081}
4082
963d8fe5
TM		 4083static const struct rpc_call_ops nfs4_renew_ops = {
4084 .rpc_call_done = nfs4_renew_done,
dc96aef9 4085 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4086};
4087
2f60ea6b 4088static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4089{
4090 struct rpc_message msg = {
4091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4092 .rpc_argp = clp,
b4454fe1 4093 .rpc_cred = cred,
1da177e4 4094 };
9bc4e3ca 4095 struct nfs4_renewdata *data;
1da177e4 4096
2f60ea6b
TM		 4097 if (renew_flags == 0)
4098 return 0;
0851de06
AB		 4099 if (!atomic_inc_not_zero(&clp->cl_count))
4100 return -EIO;
b569ad34 4101 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4102 if (data == NULL)
4103 return -ENOMEM;
4104 data->client = clp;
4105 data->timestamp = jiffies;
bc7a05ca 4106 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4107 &nfs4_renew_ops, data);
1da177e4
LT		 4108}
4109
8534d4ec 4110static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4111{
4112 struct rpc_message msg = {
4113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4114 .rpc_argp = clp,
b4454fe1 4115 .rpc_cred = cred,
1da177e4
LT		 4116 };
4117 unsigned long now = jiffies;
4118 int status;
4119
bc7a05ca 4120 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4121 if (status < 0)
4122 return status;
452e9352 4123 do_renew_lease(clp, now);
1da177e4
LT		 4124 return 0;
4125}
4126
aa1870af
BF		 4127static inline int nfs4_server_supports_acls(struct nfs_server *server)
4128{
4129 return (server->caps & NFS_CAP_ACLS)
4130 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4131 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4132}
4133
21f498c2
TM		 4134/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4135 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4136 * the stack.
4137 */
21f498c2 4138#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4139
e9e3d724
NH		 4140static int buf_to_pages_noslab(const void *buf, size_t buflen,
4141 struct page **pages, unsigned int *pgbase)
4142{
4143 struct page *newpage, **spages;
4144 int rc = 0;
4145 size_t len;
4146 spages = pages;
4147
4148 do {
21f498c2 4149 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4150 newpage = alloc_page(GFP_KERNEL);
4151
4152 if (newpage == NULL)
4153 goto unwind;
4154 memcpy(page_address(newpage), buf, len);
4155 buf += len;
4156 buflen -= len;
4157 *pages++ = newpage;
4158 rc++;
4159 } while (buflen != 0);
4160
4161 return rc;
4162
4163unwind:
4164 for(; rc > 0; rc--)
4165 __free_page(spages[rc-1]);
4166 return -ENOMEM;
4167}
4168
e50a1c2e
BF		 4169struct nfs4_cached_acl {
4170 int cached;
4171 size_t len;
3e9d4154 4172 char data[0];
e50a1c2e
BF		 4173};
4174
4175static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4176{
4177 struct nfs_inode *nfsi = NFS_I(inode);
4178
4179 spin_lock(&inode->i_lock);
4180 kfree(nfsi->nfs4_acl);
4181 nfsi->nfs4_acl = acl;
4182 spin_unlock(&inode->i_lock);
4183}
4184
4185static void nfs4_zap_acl_attr(struct inode *inode)
4186{
4187 nfs4_set_cached_acl(inode, NULL);
4188}
4189
4190static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4191{
4192 struct nfs_inode *nfsi = NFS_I(inode);
4193 struct nfs4_cached_acl *acl;
4194 int ret = -ENOENT;
4195
4196 spin_lock(&inode->i_lock);
4197 acl = nfsi->nfs4_acl;
4198 if (acl == NULL)
4199 goto out;
4200 if (buf == NULL) /* user is just asking for length */
4201 goto out_len;
4202 if (acl->cached == 0)
4203 goto out;
4204 ret = -ERANGE; /* see getxattr(2) man page */
4205 if (acl->len > buflen)
4206 goto out;
4207 memcpy(buf, acl->data, acl->len);
4208out_len:
4209 ret = acl->len;
4210out:
4211 spin_unlock(&inode->i_lock);
4212 return ret;
4213}
4214
5794d21e 4215static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4216{
4217 struct nfs4_cached_acl *acl;
b291f1b1 4218 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4219
1f1ea6c2 4220 if (buflen <= PAGE_SIZE) {
b291f1b1 4221 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4222 if (acl == NULL)
4223 goto out;
4224 acl->cached = 1;
5794d21e 4225 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4226 } else {
4227 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4228 if (acl == NULL)
4229 goto out;
4230 acl->cached = 0;
4231 }
4232 acl->len = acl_len;
4233out:
4234 nfs4_set_cached_acl(inode, acl);
4235}
4236
bf118a34
AA		 4237/*
4238 * The getxattr API returns the required buffer length when called with a
4239 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4240 * the required buf. On a NULL buf, we send a page of data to the server
4241 * guessing that the ACL request can be serviced by a page. If so, we cache
4242 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4243 * the cache. If not so, we throw away the page, and cache the required
4244 * length. The next getxattr call will then produce another round trip to
4245 * the server, this time with the input buf of the required size.
4246 */
16b4289c 4247static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4248{
bf118a34 4249 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4250 struct nfs_getaclargs args = {
4251 .fh = NFS_FH(inode),
4252 .acl_pages = pages,
4253 .acl_len = buflen,
4254 };
663c79b3
BH		 4255 struct nfs_getaclres res = {
4256 .acl_len = buflen,
4257 };
aa1870af
BF		 4258 struct rpc_message msg = {
4259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4260 .rpc_argp = &args,
663c79b3 4261 .rpc_resp = &res,
aa1870af 4262 };
21f498c2
TM		 4263 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4264 int ret = -ENOMEM, i;
aa1870af 4265
bf118a34
AA		 4266 /* As long as we're doing a round trip to the server anyway,
4267 * let's be prepared for a page of acl data. */
4268 if (npages == 0)
4269 npages = 1;
21f498c2
TM		 4270 if (npages > ARRAY_SIZE(pages))
4271 return -ERANGE;
5a006899 4272
bf118a34
AA		 4273 for (i = 0; i < npages; i++) {
4274 pages[i] = alloc_page(GFP_KERNEL);
4275 if (!pages[i])
4276 goto out_free;
e50a1c2e 4277 }
5a006899
SP		 4278
4279 /* for decoding across pages */
4280 res.acl_scratch = alloc_page(GFP_KERNEL);
4281 if (!res.acl_scratch)
4282 goto out_free;
4283
bf118a34
AA		 4284 args.acl_len = npages * PAGE_SIZE;
4285 args.acl_pgbase = 0;
5a006899 4286
de040bec 4287 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4288 __func__, buf, buflen, npages, args.acl_len);
4289 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4290 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4291 if (ret)
4292 goto out_free;
bf118a34 4293
1f1ea6c2
TM		 4294 /* Handle the case where the passed-in buffer is too short */
4295 if (res.acl_flags & NFS4_ACL_TRUNC) {
4296 /* Did the user only issue a request for the acl length? */
4297 if (buf == NULL)
4298 goto out_ok;
e50a1c2e 4299 ret = -ERANGE;
1f1ea6c2 4300 goto out_free;
e50a1c2e 4301 }
1f1ea6c2 4302 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4303 if (buf) {
4304 if (res.acl_len > buflen) {
4305 ret = -ERANGE;
4306 goto out_free;
4307 }
1f1ea6c2 4308 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4309 }
1f1ea6c2
TM		 4310out_ok:
4311 ret = res.acl_len;
e50a1c2e 4312out_free:
bf118a34
AA		 4313 for (i = 0; i < npages; i++)
4314 if (pages[i])
4315 __free_page(pages[i]);
331818f1
TM		 4316 if (res.acl_scratch)
4317 __free_page(res.acl_scratch);
aa1870af
BF		 4318 return ret;
4319}
4320
16b4289c
TM		 4321static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4322{
4323 struct nfs4_exception exception = { };
4324 ssize_t ret;
4325 do {
4326 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4327 if (ret >= 0)
4328 break;
4329 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4330 } while (exception.retry);
4331 return ret;
4332}
4333
e50a1c2e
BF		 4334static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4335{
4336 struct nfs_server *server = NFS_SERVER(inode);
4337 int ret;
4338
4339 if (!nfs4_server_supports_acls(server))
4340 return -EOPNOTSUPP;
4341 ret = nfs_revalidate_inode(server, inode);
4342 if (ret < 0)
4343 return ret;
08a22b39
AK		 4344 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4345 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4346 ret = nfs4_read_cached_acl(inode, buf, buflen);
4347 if (ret != -ENOENT)
bf118a34
AA		 4348 /* -ENOENT is returned if there is no ACL or if there is an ACL
4349 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4350 return ret;
4351 return nfs4_get_acl_uncached(inode, buf, buflen);
4352}
4353
16b4289c 4354static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4355{
4356 struct nfs_server *server = NFS_SERVER(inode);
4357 struct page *pages[NFS4ACL_MAXPAGES];
4358 struct nfs_setaclargs arg = {
4359 .fh = NFS_FH(inode),
4360 .acl_pages = pages,
4361 .acl_len = buflen,
4362 };
73c403a9 4363 struct nfs_setaclres res;
4b580ee3
BF		 4364 struct rpc_message msg = {
4365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4366 .rpc_argp = &arg,
73c403a9 4367 .rpc_resp = &res,
4b580ee3 4368 };
21f498c2 4369 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4370 int ret, i;
4b580ee3
BF		 4371
4372 if (!nfs4_server_supports_acls(server))
4373 return -EOPNOTSUPP;
21f498c2
TM		 4374 if (npages > ARRAY_SIZE(pages))
4375 return -ERANGE;
e9e3d724
NH		 4376 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4377 if (i < 0)
4378 return i;
57ec14c5 4379 nfs4_inode_return_delegation(inode);
7c513058 4380 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4381
4382 /*
4383 * Free each page after tx, so the only ref left is
4384 * held by the network stack
4385 */
4386 for (; i > 0; i--)
4387 put_page(pages[i-1]);
4388
08a22b39
AK		 4389 /*
4390 * Acl update can result in inode attribute update.
4391 * so mark the attribute cache invalid.
4392 */
4393 spin_lock(&inode->i_lock);
4394 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4395 spin_unlock(&inode->i_lock);
f41f7418
TM		 4396 nfs_access_zap_cache(inode);
4397 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4398 return ret;
4399}
4400
16b4289c
TM		 4401static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4402{
4403 struct nfs4_exception exception = { };
4404 int err;
4405 do {
4406 err = nfs4_handle_exception(NFS_SERVER(inode),
4407 __nfs4_proc_set_acl(inode, buf, buflen),
4408 &exception);
4409 } while (exception.retry);
4410 return err;
4411}
4412
aa9c2669
DQ		 4413#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4414static int _nfs4_get_security_label(struct inode *inode, void *buf,
4415 size_t buflen)
4416{
4417 struct nfs_server *server = NFS_SERVER(inode);
4418 struct nfs_fattr fattr;
4419 struct nfs4_label label = {0, 0, buflen, buf};
4420
4421 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4422 struct nfs4_getattr_arg args = {
4423 .fh = NFS_FH(inode),
4424 .bitmask = bitmask,
4425 };
4426 struct nfs4_getattr_res res = {
4427 .fattr = &fattr,
4428 .label = &label,
4429 .server = server,
4430 };
4431 struct rpc_message msg = {
4432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4433 .rpc_argp = &args,
4434 .rpc_resp = &res,
4435 };
4436 int ret;
4437
4438 nfs_fattr_init(&fattr);
4439
4440 ret = rpc_call_sync(server->client, &msg, 0);
4441 if (ret)
4442 return ret;
4443 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4444 return -ENOENT;
4445 if (buflen < label.len)
4446 return -ERANGE;
4447 return 0;
4448}
4449
4450static int nfs4_get_security_label(struct inode *inode, void *buf,
4451 size_t buflen)
4452{
4453 struct nfs4_exception exception = { };
4454 int err;
4455
4456 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4457 return -EOPNOTSUPP;
4458
4459 do {
4460 err = nfs4_handle_exception(NFS_SERVER(inode),
4461 _nfs4_get_security_label(inode, buf, buflen),
4462 &exception);
4463 } while (exception.retry);
4464 return err;
4465}
4466
4467static int _nfs4_do_set_security_label(struct inode *inode,
4468 struct nfs4_label *ilabel,
4469 struct nfs_fattr *fattr,
4470 struct nfs4_label *olabel)
4471{
4472
4473 struct iattr sattr = {0};
4474 struct nfs_server *server = NFS_SERVER(inode);
4475 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4476 struct nfs_setattrargs args = {
4477 .fh = NFS_FH(inode),
4478 .iap = &sattr,
4479 .server = server,
4480 .bitmask = bitmask,
4481 .label = ilabel,
4482 };
4483 struct nfs_setattrres res = {
4484 .fattr = fattr,
4485 .label = olabel,
4486 .server = server,
4487 };
4488 struct rpc_message msg = {
4489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4490 .rpc_argp = &args,
4491 .rpc_resp = &res,
4492 };
4493 int status;
4494
4495 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4496
4497 status = rpc_call_sync(server->client, &msg, 0);
4498 if (status)
4499 dprintk("%s failed: %d\n", __func__, status);
4500
4501 return status;
4502}
4503
4504static int nfs4_do_set_security_label(struct inode *inode,
4505 struct nfs4_label *ilabel,
4506 struct nfs_fattr *fattr,
4507 struct nfs4_label *olabel)
4508{
4509 struct nfs4_exception exception = { };
4510 int err;
4511
4512 do {
4513 err = nfs4_handle_exception(NFS_SERVER(inode),
4514 _nfs4_do_set_security_label(inode, ilabel,
4515 fattr, olabel),
4516 &exception);
4517 } while (exception.retry);
4518 return err;
4519}
4520
4521static int
4522nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4523{
4524 struct nfs4_label ilabel, *olabel = NULL;
4525 struct nfs_fattr fattr;
4526 struct rpc_cred *cred;
4527 struct inode *inode = dentry->d_inode;
4528 int status;
4529
4530 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4531 return -EOPNOTSUPP;
4532
4533 nfs_fattr_init(&fattr);
4534
4535 ilabel.pi = 0;
4536 ilabel.lfs = 0;
4537 ilabel.label = (char *)buf;
4538 ilabel.len = buflen;
4539
4540 cred = rpc_lookup_cred();
4541 if (IS_ERR(cred))
4542 return PTR_ERR(cred);
4543
4544 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4545 if (IS_ERR(olabel)) {
4546 status = -PTR_ERR(olabel);
4547 goto out;
4548 }
4549
4550 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4551 if (status == 0)
4552 nfs_setsecurity(inode, &fattr, olabel);
4553
4554 nfs4_label_free(olabel);
4555out:
4556 put_rpccred(cred);
4557 return status;
4558}
4559#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4560
4561
1da177e4 4562static int
aa5190d0 4563nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4564{
aa5190d0
TM		 4565 struct nfs_client *clp = server->nfs_client;
4566
4567 if (task->tk_status >= 0)
1da177e4
LT		 4568 return 0;
4569 switch(task->tk_status) {
a1d0b5ee 4570 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4571 case -NFS4ERR_ADMIN_REVOKED:
4572 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4573 if (state == NULL)
4574 break;
4575 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4576 case -NFS4ERR_OPENMODE:
4577 if (state == NULL)
4578 break;
5d422301
TM		 4579 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4580 goto stateid_invalid;
0400a6b0 4581 goto wait_on_recovery;
0ced63d1 4582 case -NFS4ERR_EXPIRED:
5d422301
TM		 4583 if (state != NULL) {
4584 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4585 goto stateid_invalid;
4586 }
1da177e4 4587 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4588 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4589 nfs4_schedule_lease_recovery(clp);
4590 goto wait_on_recovery;
4745e315
AA		 4591#if defined(CONFIG_NFS_V4_1)
4592 case -NFS4ERR_BADSESSION:
4593 case -NFS4ERR_BADSLOT:
4594 case -NFS4ERR_BAD_HIGH_SLOT:
4595 case -NFS4ERR_DEADSESSION:
4596 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4597 case -NFS4ERR_SEQ_FALSE_RETRY:
4598 case -NFS4ERR_SEQ_MISORDERED:
4599 dprintk("%s ERROR %d, Reset session\n", __func__,
4600 task->tk_status);
9f594791 4601 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4602 task->tk_status = 0;
4603 return -EAGAIN;
4604#endif /* CONFIG_NFS_V4_1 */
1da177e4 4605 case -NFS4ERR_DELAY:
aa5190d0 4606 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4607 case -NFS4ERR_GRACE:
1da177e4
LT		 4608 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4609 task->tk_status = 0;
4610 return -EAGAIN;
a8a4ae3a 4611 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4612 case -NFS4ERR_OLD_STATEID:
4613 task->tk_status = 0;
4614 return -EAGAIN;
4615 }
4616 task->tk_status = nfs4_map_errors(task->tk_status);
4617 return 0;
5d422301
TM		 4618stateid_invalid:
4619 task->tk_status = -EIO;
4620 return 0;
0400a6b0 4621wait_on_recovery:
a2c0b9e2 4622 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4623 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4624 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4625 task->tk_status = 0;
4626 return -EAGAIN;
1da177e4
LT		 4627}
4628
f092075d
CL		 4629static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4630 nfs4_verifier *bootverf)
cd93710e
CL		 4631{
4632 __be32 verf[2];
4633
2c820d9a
CL		 4634 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4635 /* An impossible timestamp guarantees this value
4636 * will never match a generated boot time. */
4637 verf[0] = 0;
17f26b12 4638 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4639 } else {
f092075d 4640 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4641 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4642 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4643 }
cd93710e
CL		 4644 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4645}
4646
e984a55a
CL		 4647static unsigned int
4648nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4649 char *buf, size_t len)
4650{
4651 unsigned int result;
4652
4653 rcu_read_lock();
4654 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4655 clp->cl_ipaddr,
4656 rpc_peeraddr2str(clp->cl_rpcclient,
4657 RPC_DISPLAY_ADDR),
4658 rpc_peeraddr2str(clp->cl_rpcclient,
4659 RPC_DISPLAY_PROTO));
4660 rcu_read_unlock();
4661 return result;
4662}
4663
4664static unsigned int
4665nfs4_init_uniform_client_string(const struct nfs_client *clp,
4666 char *buf, size_t len)
4667{
55b59293 4668 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4669
4670 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4671 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4672 clp->rpc_ops->version,
4673 clp->cl_minorversion,
4674 nfs4_client_id_uniquifier,
4675 nodename);
e984a55a
CL		 4676 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4677 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4678 nodename);
e984a55a
CL		 4679}
4680
6bbb4ae8
CL		 4681/**
4682 * nfs4_proc_setclientid - Negotiate client ID
4683 * @clp: state data structure
4684 * @program: RPC program for NFSv4 callback service
4685 * @port: IP port number for NFS4 callback service
4686 * @cred: RPC credential to use for this call
4687 * @res: where to place the result
4688 *
4689 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4690 */
bb8b27e5
TM		 4691int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4692 unsigned short port, struct rpc_cred *cred,
4693 struct nfs4_setclientid_res *res)
1da177e4
LT		 4694{
4695 nfs4_verifier sc_verifier;
4696 struct nfs4_setclientid setclientid = {
4697 .sc_verifier = &sc_verifier,
4698 .sc_prog = program,
f4eecd5d 4699 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4700 };
4701 struct rpc_message msg = {
4702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4703 .rpc_argp = &setclientid,
bb8b27e5 4704 .rpc_resp = res,
286d7d6a 4705 .rpc_cred = cred,
1da177e4 4706 };
6bbb4ae8 4707 int status;
1da177e4 4708
de734831 4709 /* nfs_client_id4 */
f092075d 4710 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4711 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4712 setclientid.sc_name_len =
4713 nfs4_init_uniform_client_string(clp,
4714 setclientid.sc_name,
4715 sizeof(setclientid.sc_name));
4716 else
4717 setclientid.sc_name_len =
4718 nfs4_init_nonuniform_client_string(clp,
4719 setclientid.sc_name,
4720 sizeof(setclientid.sc_name));
de734831 4721 /* cb_client4 */
e984a55a 4722 rcu_read_lock();
de734831 4723 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4724 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4725 rpc_peeraddr2str(clp->cl_rpcclient,
4726 RPC_DISPLAY_NETID));
de734831
CL		 4727 rcu_read_unlock();
4728 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4729 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4730 clp->cl_ipaddr, port >> 8, port & 255);
4731
6bbb4ae8
CL		 4732 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4733 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4734 setclientid.sc_name_len, setclientid.sc_name);
4735 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4736 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4737 dprintk("NFS reply setclientid: %d\n", status);
4738 return status;
1da177e4
LT		 4739}
4740
6bbb4ae8
CL		 4741/**
4742 * nfs4_proc_setclientid_confirm - Confirm client ID
4743 * @clp: state data structure
4744 * @res: result of a previous SETCLIENTID
4745 * @cred: RPC credential to use for this call
4746 *
4747 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4748 */
fd954ae1 4749int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4750 struct nfs4_setclientid_res *arg,
4751 struct rpc_cred *cred)
1da177e4 4752{
1da177e4
LT		 4753 struct rpc_message msg = {
4754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4755 .rpc_argp = arg,
286d7d6a 4756 .rpc_cred = cred,
1da177e4 4757 };
1da177e4
LT		 4758 int status;
4759
6bbb4ae8
CL		 4760 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4761 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4762 clp->cl_clientid);
1bd714f2 4763 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4764 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4765 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4766 return status;
4767}
4768
fe650407
TM		 4769struct nfs4_delegreturndata {
4770 struct nfs4_delegreturnargs args;
fa178f29 4771 struct nfs4_delegreturnres res;
fe650407
TM		 4772 struct nfs_fh fh;
4773 nfs4_stateid stateid;
26e976a8 4774 unsigned long timestamp;
fa178f29 4775 struct nfs_fattr fattr;
fe650407
TM		 4776 int rpc_status;
4777};
4778
fe650407
TM		 4779static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4780{
4781 struct nfs4_delegreturndata *data = calldata;
938e1010 4782
14516c3a
TM		 4783 if (!nfs4_sequence_done(task, &data->res.seq_res))
4784 return;
938e1010 4785
79708861
RL		 4786 switch (task->tk_status) {
4787 case -NFS4ERR_STALE_STATEID:
4788 case -NFS4ERR_EXPIRED:
4789 case 0:
fa178f29 4790 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4791 break;
4792 default:
4793 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4794 -EAGAIN) {
d00c5d43 4795 rpc_restart_call_prepare(task);
79708861
RL		 4796 return;
4797 }
4798 }
4799 data->rpc_status = task->tk_status;
fe650407
TM		 4800}
4801
4802static void nfs4_delegreturn_release(void *calldata)
4803{
fe650407
TM		 4804 kfree(calldata);
4805}
4806
938e1010
AA		 4807#if defined(CONFIG_NFS_V4_1)
4808static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4809{
4810 struct nfs4_delegreturndata *d_data;
4811
4812 d_data = (struct nfs4_delegreturndata *)data;
4813
d9afbd1b
TM		 4814 nfs4_setup_sequence(d_data->res.server,
4815 &d_data->args.seq_args,
4816 &d_data->res.seq_res,
4817 task);
938e1010
AA		 4818}
4819#endif /* CONFIG_NFS_V4_1 */
4820
c8d149f3 4821static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4822#if defined(CONFIG_NFS_V4_1)
4823 .rpc_call_prepare = nfs4_delegreturn_prepare,
4824#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4825 .rpc_call_done = nfs4_delegreturn_done,
4826 .rpc_release = nfs4_delegreturn_release,
4827};
4828
e6f81075 4829static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4830{
4831 struct nfs4_delegreturndata *data;
fa178f29 4832 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4833 struct rpc_task *task;
5138fde0
TM		 4834 struct rpc_message msg = {
4835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4836 .rpc_cred = cred,
4837 };
c970aa85
TM		 4838 struct rpc_task_setup task_setup_data = {
4839 .rpc_client = server->client,
5138fde0 4840 .rpc_message = &msg,
c970aa85
TM		 4841 .callback_ops = &nfs4_delegreturn_ops,
4842 .flags = RPC_TASK_ASYNC,
4843 };
e6f81075 4844 int status = 0;
fe650407 4845
8535b2be 4846 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4847 if (data == NULL)
4848 return -ENOMEM;
9d12b216 4849 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4850 data->args.fhandle = &data->fh;
4851 data->args.stateid = &data->stateid;
9e907fec 4852 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4853 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4854 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4855 data->res.fattr = &data->fattr;
4856 data->res.server = server;
5138fde0 4857 nfs_fattr_init(data->res.fattr);
26e976a8 4858 data->timestamp = jiffies;
fe650407
TM		 4859 data->rpc_status = 0;
4860
c970aa85 4861 task_setup_data.callback_data = data;
1174dd1f
TM		 4862 msg.rpc_argp = &data->args;
4863 msg.rpc_resp = &data->res;
c970aa85 4864 task = rpc_run_task(&task_setup_data);
7a1218a2 4865 if (IS_ERR(task))
fe650407 4866 return PTR_ERR(task);
e6f81075
TM		 4867 if (!issync)
4868 goto out;
fe650407 4869 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4870 if (status != 0)
4871 goto out;
4872 status = data->rpc_status;
e144cbcc
TM		 4873 if (status == 0)
4874 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4875 else
4876 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4877out:
e6b3c4db 4878 rpc_put_task(task);
fe650407 4879 return status;
1da177e4
LT		 4880}
4881
e6f81075 4882int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4883{
4884 struct nfs_server *server = NFS_SERVER(inode);
4885 struct nfs4_exception exception = { };
4886 int err;
4887 do {
e6f81075 4888 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4889 switch (err) {
4890 case -NFS4ERR_STALE_STATEID:
4891 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4892 case 0:
4893 return 0;
4894 }
4895 err = nfs4_handle_exception(server, err, &exception);
4896 } while (exception.retry);
4897 return err;
4898}
4899
4900#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4901#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4902
4903/*
4904 * sleep, with exponential backoff, and retry the LOCK operation.
4905 */
4906static unsigned long
4907nfs4_set_lock_task_retry(unsigned long timeout)
4908{
416ad3c9 4909 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4910 timeout <<= 1;
4911 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4912 return NFS4_LOCK_MAXTIMEOUT;
4913 return timeout;
4914}
4915
1da177e4
LT		 4916static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4917{
4918 struct inode *inode = state->inode;
4919 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4920 struct nfs_client *clp = server->nfs_client;
911d1aaf 4921 struct nfs_lockt_args arg = {
1da177e4 4922 .fh = NFS_FH(inode),
911d1aaf 4923 .fl = request,
1da177e4 4924 };
911d1aaf
TM		 4925 struct nfs_lockt_res res = {
4926 .denied = request,
1da177e4
LT		 4927 };
4928 struct rpc_message msg = {
4929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4930 .rpc_argp = &arg,
4931 .rpc_resp = &res,
4932 .rpc_cred = state->owner->so_cred,
4933 };
1da177e4
LT		 4934 struct nfs4_lock_state *lsp;
4935 int status;
4936
911d1aaf 4937 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4938 status = nfs4_set_lock_state(state, request);
4939 if (status != 0)
4940 goto out;
4941 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4942 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4943 arg.lock_owner.s_dev = server->s_dev;
7c513058 4944 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4945 switch (status) {
4946 case 0:
4947 request->fl_type = F_UNLCK;
4948 break;
4949 case -NFS4ERR_DENIED:
4950 status = 0;
1da177e4 4951 }
70cc6487 4952 request->fl_ops->fl_release_private(request);
8d0a8a9d 4953out:
1da177e4
LT		 4954 return status;
4955}
4956
4957static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4958{
4959 struct nfs4_exception exception = { };
4960 int err;
4961
4962 do {
4963 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4964 _nfs4_proc_getlk(state, cmd, request),
4965 &exception);
4966 } while (exception.retry);
4967 return err;
4968}
4969
4970static int do_vfs_lock(struct file *file, struct file_lock *fl)
4971{
4972 int res = 0;
4973 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4974 case FL_POSIX:
4975 res = posix_lock_file_wait(file, fl);
4976 break;
4977 case FL_FLOCK:
4978 res = flock_lock_file_wait(file, fl);
4979 break;
4980 default:
4981 BUG();
4982 }
1da177e4
LT		 4983 return res;
4984}
4985
faf5f49c 4986struct nfs4_unlockdata {
911d1aaf
TM		 4987 struct nfs_locku_args arg;
4988 struct nfs_locku_res res;
faf5f49c
TM		 4989 struct nfs4_lock_state *lsp;
4990 struct nfs_open_context *ctx;
911d1aaf
TM		 4991 struct file_lock fl;
4992 const struct nfs_server *server;
26e976a8 4993 unsigned long timestamp;
faf5f49c
TM		 4994};
4995
911d1aaf
TM		 4996static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4997 struct nfs_open_context *ctx,
4998 struct nfs4_lock_state *lsp,
4999 struct nfs_seqid *seqid)
5000{
5001 struct nfs4_unlockdata *p;
5002 struct inode *inode = lsp->ls_state->inode;
5003
8535b2be 5004 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5005 if (p == NULL)
5006 return NULL;
5007 p->arg.fh = NFS_FH(inode);
5008 p->arg.fl = &p->fl;
5009 p->arg.seqid = seqid;
c1d51931 5010 p->res.seqid = seqid;
911d1aaf
TM		 5011 p->arg.stateid = &lsp->ls_stateid;
5012 p->lsp = lsp;
5013 atomic_inc(&lsp->ls_count);
5014 /* Ensure we don't close file until we're done freeing locks! */
5015 p->ctx = get_nfs_open_context(ctx);
5016 memcpy(&p->fl, fl, sizeof(p->fl));
5017 p->server = NFS_SERVER(inode);
5018 return p;
5019}
5020
06f814a3 5021static void nfs4_locku_release_calldata(void *data)
faf5f49c 5022{
963d8fe5 5023 struct nfs4_unlockdata *calldata = data;
911d1aaf 5024 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5025 nfs4_put_lock_state(calldata->lsp);
5026 put_nfs_open_context(calldata->ctx);
5027 kfree(calldata);
faf5f49c
TM		 5028}
5029
963d8fe5 5030static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5031{
963d8fe5 5032 struct nfs4_unlockdata *calldata = data;
faf5f49c 5033
14516c3a
TM		 5034 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5035 return;
faf5f49c
TM		 5036 switch (task->tk_status) {
5037 case 0:
f597c537
TM		 5038 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5039 &calldata->res.stateid);
26e976a8 5040 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5041 break;
9e33bed5
TM		 5042 case -NFS4ERR_BAD_STATEID:
5043 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5044 case -NFS4ERR_STALE_STATEID:
5045 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5046 break;
5047 default:
9e33bed5 5048 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5049 rpc_restart_call_prepare(task);
faf5f49c 5050 }
2b1bc308 5051 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5052}
5053
4ce70ada 5054static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5055{
4ce70ada 5056 struct nfs4_unlockdata *calldata = data;
faf5f49c 5057
911d1aaf 5058 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5059 goto out_wait;
795a88c9 5060 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5061 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5062 goto out_no_action;
faf5f49c 5063 }
26e976a8 5064 calldata->timestamp = jiffies;
035168ab 5065 if (nfs4_setup_sequence(calldata->server,
a893693c 5066 &calldata->arg.seq_args,
2240a9e2
TM		 5067 &calldata->res.seq_res,
5068 task) != 0)
5069 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5070 return;
5071out_no_action:
5072 task->tk_action = NULL;
5073out_wait:
5074 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5075}
5076
963d8fe5 5077static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5078 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5079 .rpc_call_done = nfs4_locku_done,
06f814a3 5080 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5081};
5082
a5d16a4d
TM		 5083static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5084 struct nfs_open_context *ctx,
5085 struct nfs4_lock_state *lsp,
5086 struct nfs_seqid *seqid)
5087{
5088 struct nfs4_unlockdata *data;
5138fde0
TM		 5089 struct rpc_message msg = {
5090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5091 .rpc_cred = ctx->cred,
5092 };
c970aa85
TM		 5093 struct rpc_task_setup task_setup_data = {
5094 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5095 .rpc_message = &msg,
c970aa85 5096 .callback_ops = &nfs4_locku_ops,
101070ca 5097 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5098 .flags = RPC_TASK_ASYNC,
5099 };
a5d16a4d 5100
137d6aca
FF		 5101 /* Ensure this is an unlock - when canceling a lock, the
5102 * canceled lock is passed in, and it won't be an unlock.
5103 */
5104 fl->fl_type = F_UNLCK;
5105
a5d16a4d
TM		 5106 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5107 if (data == NULL) {
5108 nfs_free_seqid(seqid);
5109 return ERR_PTR(-ENOMEM);
5110 }
5111
9d12b216 5112 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5113 msg.rpc_argp = &data->arg;
5114 msg.rpc_resp = &data->res;
c970aa85
TM		 5115 task_setup_data.callback_data = data;
5116 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5117}
5118
faf5f49c
TM		 5119static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5120{
65b62a29
TM		 5121 struct inode *inode = state->inode;
5122 struct nfs4_state_owner *sp = state->owner;
5123 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5124 struct nfs_seqid *seqid;
1da177e4 5125 struct nfs4_lock_state *lsp;
06f814a3
TM		 5126 struct rpc_task *task;
5127 int status = 0;
536ff0f8 5128 unsigned char fl_flags = request->fl_flags;
faf5f49c 5129
8d0a8a9d 5130 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5131 /* Unlock _before_ we do the RPC call */
5132 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5133 /* Exclude nfs_delegation_claim_locks() */
5134 mutex_lock(&sp->so_delegreturn_mutex);
5135 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5136 down_read(&nfsi->rwsem);
5137 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5138 up_read(&nfsi->rwsem);
65b62a29 5139 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5140 goto out;
19e03c57
TM		 5141 }
5142 up_read(&nfsi->rwsem);
65b62a29 5143 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5144 if (status != 0)
9b073574
TM		 5145 goto out;
5146 /* Is this a delegated lock? */
8d0a8a9d 5147 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5148 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5149 goto out;
8535b2be 5150 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5151 status = -ENOMEM;
911d1aaf 5152 if (seqid == NULL)
9b073574 5153 goto out;
cd3758e3 5154 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5155 status = PTR_ERR(task);
5156 if (IS_ERR(task))
9b073574 5157 goto out;
a5d16a4d 5158 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5159 rpc_put_task(task);
9b073574 5160out:
536ff0f8 5161 request->fl_flags = fl_flags;
1da177e4
LT		 5162 return status;
5163}
5164
a5d16a4d
TM		 5165struct nfs4_lockdata {
5166 struct nfs_lock_args arg;
5167 struct nfs_lock_res res;
5168 struct nfs4_lock_state *lsp;
5169 struct nfs_open_context *ctx;
5170 struct file_lock fl;
26e976a8 5171 unsigned long timestamp;
a5d16a4d
TM		 5172 int rpc_status;
5173 int cancelled;
66179efe 5174 struct nfs_server *server;
a5d16a4d
TM		 5175};
5176
5177static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5178 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5179 gfp_t gfp_mask)
1da177e4 5180{
a5d16a4d
TM		 5181 struct nfs4_lockdata *p;
5182 struct inode *inode = lsp->ls_state->inode;
1da177e4 5183 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5184
8535b2be 5185 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5186 if (p == NULL)
5187 return NULL;
5188
5189 p->arg.fh = NFS_FH(inode);
5190 p->arg.fl = &p->fl;
8535b2be 5191 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5192 if (p->arg.open_seqid == NULL)
5193 goto out_free;
8535b2be 5194 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5195 if (p->arg.lock_seqid == NULL)
2f74c0a0 5196 goto out_free_seqid;
a5d16a4d 5197 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5198 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5199 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5200 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5201 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5202 p->lsp = lsp;
66179efe 5203 p->server = server;
a5d16a4d
TM		 5204 atomic_inc(&lsp->ls_count);
5205 p->ctx = get_nfs_open_context(ctx);
5206 memcpy(&p->fl, fl, sizeof(p->fl));
5207 return p;
2f74c0a0
TM		 5208out_free_seqid:
5209 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5210out_free:
5211 kfree(p);
5212 return NULL;
5213}
5214
5215static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5216{
5217 struct nfs4_lockdata *data = calldata;
5218 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5219
3110ff80 5220 dprintk("%s: begin!\n", __func__);
2f74c0a0 5221 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5222 goto out_wait;
a5d16a4d
TM		 5223 /* Do we need to do an open_to_lock_owner? */
5224 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5225 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5226 goto out_release_lock_seqid;
8fe72bac 5227 }
8e472f33 5228 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5229 data->arg.new_lock_owner = 1;
c1d51931 5230 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5231 } else
5232 data->arg.new_lock_owner = 0;
5d422301
TM		 5233 if (!nfs4_valid_open_stateid(state)) {
5234 data->rpc_status = -EBADF;
5235 task->tk_action = NULL;
5236 goto out_release_open_seqid;
5237 }
26e976a8 5238 data->timestamp = jiffies;
035168ab
TM		 5239 if (nfs4_setup_sequence(data->server,
5240 &data->arg.seq_args,
2240a9e2 5241 &data->res.seq_res,
d9afbd1b 5242 task) == 0)
66179efe 5243 return;
5d422301 5244out_release_open_seqid:
2240a9e2
TM		 5245 nfs_release_seqid(data->arg.open_seqid);
5246out_release_lock_seqid:
5247 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5248out_wait:
5249 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5250 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5251}
5252
a5d16a4d
TM		 5253static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5254{
5255 struct nfs4_lockdata *data = calldata;
5256
3110ff80 5257 dprintk("%s: begin!\n", __func__);
a5d16a4d 5258
14516c3a
TM		 5259 if (!nfs4_sequence_done(task, &data->res.seq_res))
5260 return;
66179efe 5261
a5d16a4d 5262 data->rpc_status = task->tk_status;
a5d16a4d 5263 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5264 if (data->rpc_status == 0)
5265 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5266 else
5267 goto out;
5268 }
5269 if (data->rpc_status == 0) {
f597c537 5270 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5271 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5272 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5273 }
a5d16a4d 5274out:
3110ff80 5275 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5276}
5277
5278static void nfs4_lock_release(void *calldata)
5279{
5280 struct nfs4_lockdata *data = calldata;
5281
3110ff80 5282 dprintk("%s: begin!\n", __func__);
2f74c0a0 5283 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5284 if (data->cancelled != 0) {
5285 struct rpc_task *task;
5286 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5287 data->arg.lock_seqid);
5288 if (!IS_ERR(task))
bf294b41 5289 rpc_put_task_async(task);
3110ff80 5290 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5291 } else
5292 nfs_free_seqid(data->arg.lock_seqid);
5293 nfs4_put_lock_state(data->lsp);
5294 put_nfs_open_context(data->ctx);
5295 kfree(data);
3110ff80 5296 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5297}
5298
5299static const struct rpc_call_ops nfs4_lock_ops = {
5300 .rpc_call_prepare = nfs4_lock_prepare,
5301 .rpc_call_done = nfs4_lock_done,
5302 .rpc_release = nfs4_lock_release,
5303};
5304
2bee72a6
TM		 5305static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5306{
2bee72a6
TM		 5307 switch (error) {
5308 case -NFS4ERR_ADMIN_REVOKED:
5309 case -NFS4ERR_BAD_STATEID:
ecac799a 5310 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5311 if (new_lock_owner != 0 ||
795a88c9 5312 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5313 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5314 break;
5315 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5316 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5317 case -NFS4ERR_EXPIRED:
5318 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5319 };
5320}
5321
afe6c27c 5322static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5323{
5324 struct nfs4_lockdata *data;
5325 struct rpc_task *task;
5138fde0
TM		 5326 struct rpc_message msg = {
5327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5328 .rpc_cred = state->owner->so_cred,
5329 };
c970aa85
TM		 5330 struct rpc_task_setup task_setup_data = {
5331 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5332 .rpc_message = &msg,
c970aa85 5333 .callback_ops = &nfs4_lock_ops,
101070ca 5334 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5335 .flags = RPC_TASK_ASYNC,
5336 };
a5d16a4d
TM		 5337 int ret;
5338
3110ff80 5339 dprintk("%s: begin!\n", __func__);
cd3758e3 5340 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5341 fl->fl_u.nfs4_fl.owner,
5342 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5343 if (data == NULL)
5344 return -ENOMEM;
5345 if (IS_SETLKW(cmd))
5346 data->arg.block = 1;
9d12b216 5347 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5348 msg.rpc_argp = &data->arg;
5349 msg.rpc_resp = &data->res;
c970aa85 5350 task_setup_data.callback_data = data;
8fe72bac
TM		 5351 if (recovery_type > NFS_LOCK_NEW) {
5352 if (recovery_type == NFS_LOCK_RECLAIM)
5353 data->arg.reclaim = NFS_LOCK_RECLAIM;
5354 nfs4_set_sequence_privileged(&data->arg.seq_args);
5355 }
c970aa85 5356 task = rpc_run_task(&task_setup_data);
7a1218a2 5357 if (IS_ERR(task))
a5d16a4d 5358 return PTR_ERR(task);
a5d16a4d
TM		 5359 ret = nfs4_wait_for_completion_rpc_task(task);
5360 if (ret == 0) {
5361 ret = data->rpc_status;
2bee72a6
TM		 5362 if (ret)
5363 nfs4_handle_setlk_error(data->server, data->lsp,
5364 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5365 } else
5366 data->cancelled = 1;
e6b3c4db 5367 rpc_put_task(task);
3110ff80 5368 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5369 return ret;
1da177e4
LT		 5370}
5371
5372static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5373{
202b50dc 5374 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5375 struct nfs4_exception exception = {
5376 .inode = state->inode,
5377 };
202b50dc
TM		 5378 int err;
5379
5380 do {
42a2d13e
TM		 5381 /* Cache the lock if possible... */
5382 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5383 return 0;
afe6c27c 5384 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5385 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5386 break;
5387 nfs4_handle_exception(server, err, &exception);
5388 } while (exception.retry);
5389 return err;
1da177e4
LT		 5390}
5391
5392static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5393{
202b50dc 5394 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5395 struct nfs4_exception exception = {
5396 .inode = state->inode,
5397 };
202b50dc
TM		 5398 int err;
5399
6bfc93ef
TM		 5400 err = nfs4_set_lock_state(state, request);
5401 if (err != 0)
5402 return err;
202b50dc 5403 do {
42a2d13e
TM		 5404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5405 return 0;
afe6c27c 5406 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5407 switch (err) {
5408 default:
5409 goto out;
5410 case -NFS4ERR_GRACE:
5411 case -NFS4ERR_DELAY:
5412 nfs4_handle_exception(server, err, &exception);
5413 err = 0;
5414 }
202b50dc 5415 } while (exception.retry);
a9ed2e25 5416out:
202b50dc 5417 return err;
1da177e4
LT		 5418}
5419
f062eb6c 5420#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5421/**
5422 * nfs41_check_expired_locks - possibly free a lock stateid
5423 *
5424 * @state: NFSv4 state for an inode
5425 *
5426 * Returns NFS_OK if recovery for this stateid is now finished.
5427 * Otherwise a negative NFS4ERR value is returned.
5428 */
b01dd1d8 5429static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5430{
eb64cf96 5431 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5432 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5433 struct nfs_server *server = NFS_SERVER(state->inode);
5434
b01dd1d8 5435 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5436 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5437 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5438
5439 status = nfs41_test_stateid(server,
5440 &lsp->ls_stateid,
5441 cred);
b01dd1d8 5442 if (status != NFS_OK) {
3e60ffdd
CL		 5443 /* Free the stateid unless the server
5444 * informs us the stateid is unrecognized. */
89af2739
CL		 5445 if (status != -NFS4ERR_BAD_STATEID)
5446 nfs41_free_stateid(server,
ab7cb0df
TM		 5447 &lsp->ls_stateid,
5448 cred);
795a88c9 5449 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5450 ret = status;
5451 }
5452 }
5453 };
5454
5455 return ret;
5456}
5457
5458static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5459{
5460 int status = NFS_OK;
5461
5462 if (test_bit(LK_STATE_IN_USE, &state->flags))
5463 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5464 if (status != NFS_OK)
5465 status = nfs4_lock_expired(state, request);
5466 return status;
f062eb6c
BS		 5467}
5468#endif
5469
1da177e4
LT		 5470static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5471{
9a99af49 5472 struct nfs4_state_owner *sp = state->owner;
19e03c57 5473 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5474 unsigned char fl_flags = request->fl_flags;
9a99af49 5475 unsigned int seq;
8e469ebd 5476 int status = -ENOLCK;
1da177e4 5477
8e469ebd
TM		 5478 if ((fl_flags & FL_POSIX) &&
5479 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5480 goto out;
6bfc93ef 5481 /* Is this a delegated open? */
6bfc93ef
TM		 5482 status = nfs4_set_lock_state(state, request);
5483 if (status != 0)
5484 goto out;
01c3b861
TM		 5485 request->fl_flags |= FL_ACCESS;
5486 status = do_vfs_lock(request->fl_file, request);
5487 if (status < 0)
5488 goto out;
19e03c57 5489 down_read(&nfsi->rwsem);
01c3b861 5490 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5491 /* Yes: cache locks! */
01c3b861 5492 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5493 request->fl_flags = fl_flags & ~FL_SLEEP;
5494 status = do_vfs_lock(request->fl_file, request);
5495 goto out_unlock;
01c3b861 5496 }
9a99af49
TM		 5497 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5498 up_read(&nfsi->rwsem);
afe6c27c 5499 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5500 if (status != 0)
9a99af49
TM		 5501 goto out;
5502 down_read(&nfsi->rwsem);
5503 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5504 status = -NFS4ERR_DELAY;
01c3b861 5505 goto out_unlock;
9a99af49 5506 }
6bfc93ef 5507 /* Note: we always want to sleep here! */
01c3b861 5508 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5509 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5510 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5511 "manager!\n", __func__);
01c3b861 5512out_unlock:
19e03c57 5513 up_read(&nfsi->rwsem);
01c3b861
TM		 5514out:
5515 request->fl_flags = fl_flags;
1da177e4
LT		 5516 return status;
5517}
5518
5519static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5520{
a1d0b5ee
TM		 5521 struct nfs4_exception exception = {
5522 .state = state,
05ffe24f 5523 .inode = state->inode,
a1d0b5ee 5524 };
1da177e4
LT		 5525 int err;
5526
5527 do {
965b5d67
TM		 5528 err = _nfs4_proc_setlk(state, cmd, request);
5529 if (err == -NFS4ERR_DENIED)
5530 err = -EAGAIN;
1da177e4 5531 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5532 err, &exception);
1da177e4
LT		 5533 } while (exception.retry);
5534 return err;
5535}
5536
5537static int
5538nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5539{
5540 struct nfs_open_context *ctx;
5541 struct nfs4_state *state;
5542 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5543 int status;
5544
5545 /* verify open state */
cd3758e3 5546 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5547 state = ctx->state;
5548
5549 if (request->fl_start < 0 || request->fl_end < 0)
5550 return -EINVAL;
5551
d953126a
TM		 5552 if (IS_GETLK(cmd)) {
5553 if (state != NULL)
5554 return nfs4_proc_getlk(state, F_GETLK, request);
5555 return 0;
5556 }
1da177e4
LT		 5557
5558 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5559 return -EINVAL;
5560
d953126a
TM		 5561 if (request->fl_type == F_UNLCK) {
5562 if (state != NULL)
5563 return nfs4_proc_unlck(state, cmd, request);
5564 return 0;
5565 }
1da177e4 5566
d953126a
TM		 5567 if (state == NULL)
5568 return -ENOLCK;
55725513
TM		 5569 /*
5570 * Don't rely on the VFS having checked the file open mode,
5571 * since it won't do this for flock() locks.
5572 */
f44106e2 5573 switch (request->fl_type) {
55725513
TM		 5574 case F_RDLCK:
5575 if (!(filp->f_mode & FMODE_READ))
5576 return -EBADF;
5577 break;
5578 case F_WRLCK:
5579 if (!(filp->f_mode & FMODE_WRITE))
5580 return -EBADF;
5581 }
5582
1da177e4
LT		 5583 do {
5584 status = nfs4_proc_setlk(state, cmd, request);
5585 if ((status != -EAGAIN) || IS_SETLK(cmd))
5586 break;
5587 timeout = nfs4_set_lock_task_retry(timeout);
5588 status = -ERESTARTSYS;
5589 if (signalled())
5590 break;
5591 } while(status < 0);
1da177e4
LT		 5592 return status;
5593}
5594
db4f2e63 5595int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5596{
5597 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5598 int err;
5599
5600 err = nfs4_set_lock_state(state, fl);
5601 if (err != 0)
db4f2e63 5602 return err;
4a706fa0 5603 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5604 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5605}
6b3b5496 5606
cf470c3e
TM		 5607struct nfs_release_lockowner_data {
5608 struct nfs4_lock_state *lsp;
5ae67c4f 5609 struct nfs_server *server;
cf470c3e
TM		 5610 struct nfs_release_lockowner_args args;
5611};
5612
d3c7b7cc
TM		 5613static void nfs4_release_lockowner_release(void *calldata)
5614{
cf470c3e 5615 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5616 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5617 kfree(calldata);
5618}
5619
17280175 5620static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5621 .rpc_release = nfs4_release_lockowner_release,
5622};
5623
c8b2d0bf 5624static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5625{
cf470c3e 5626 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5627 struct rpc_message msg = {
5628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5629 };
5630
5631 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5632 return -EINVAL;
5633 data = kmalloc(sizeof(*data), GFP_NOFS);
5634 if (!data)
5635 return -ENOMEM;
5636 data->lsp = lsp;
5ae67c4f 5637 data->server = server;
cf470c3e
TM		 5638 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5639 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5640 data->args.lock_owner.s_dev = server->s_dev;
5641 msg.rpc_argp = &data->args;
5642 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5643 return 0;
d3c7b7cc
TM		 5644}
5645
aa1870af
BF		 5646#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5647
64c2ce8b
AK		 5648static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5649 const void *buf, size_t buflen,
5650 int flags, int type)
6b3b5496 5651{
64c2ce8b
AK		 5652 if (strcmp(key, "") != 0)
5653 return -EINVAL;
4b580ee3 5654
64c2ce8b 5655 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5656}
5657
64c2ce8b
AK		 5658static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5659 void *buf, size_t buflen, int type)
6b3b5496 5660{
64c2ce8b
AK		 5661 if (strcmp(key, "") != 0)
5662 return -EINVAL;
aa1870af 5663
64c2ce8b 5664 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5665}
5666
64c2ce8b
AK		 5667static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5668 size_t list_len, const char *name,
5669 size_t name_len, int type)
6b3b5496 5670{
64c2ce8b 5671 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5672
096455a2
BF		 5673 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5674 return 0;
64c2ce8b
AK		 5675
5676 if (list && len <= list_len)
5677 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5678 return len;
6b3b5496
BF		 5679}
5680
c9bccef6
DQ		 5681#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5682static inline int nfs4_server_supports_labels(struct nfs_server *server)
5683{
5684 return server->caps & NFS_CAP_SECURITY_LABEL;
5685}
5686
5687static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5688 const void *buf, size_t buflen,
5689 int flags, int type)
5690{
5691 if (security_ismaclabel(key))
5692 return nfs4_set_security_label(dentry, buf, buflen);
5693
5694 return -EOPNOTSUPP;
5695}
5696
5697static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5698 void *buf, size_t buflen, int type)
5699{
5700 if (security_ismaclabel(key))
5701 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5702 return -EOPNOTSUPP;
5703}
5704
5705static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5706 size_t list_len, const char *name,
5707 size_t name_len, int type)
5708{
5709 size_t len = 0;
5710
5711 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5712 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5713 if (list && len <= list_len)
5714 security_inode_listsecurity(dentry->d_inode, list, len);
5715 }
5716 return len;
5717}
5718
5719static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5720 .prefix = XATTR_SECURITY_PREFIX,
5721 .list = nfs4_xattr_list_nfs4_label,
5722 .get = nfs4_xattr_get_nfs4_label,
5723 .set = nfs4_xattr_set_nfs4_label,
5724};
5725#endif
5726
5727
533eb461
AA		 5728/*
5729 * nfs_fhget will use either the mounted_on_fileid or the fileid
5730 */
69aaaae1
TM		 5731static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5732{
533eb461
AA		 5733 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5734 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5735 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5736 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5737 return;
5738
5739 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5740 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5741 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5742 fattr->nlink = 2;
5743}
5744
f05d147f
BS		 5745static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5746 const struct qstr *name,
5747 struct nfs4_fs_locations *fs_locations,
5748 struct page *page)
683b57b4
TM		 5749{
5750 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5751 u32 bitmask[3] = {
361e624f 5752 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5753 };
5754 struct nfs4_fs_locations_arg args = {
5755 .dir_fh = NFS_FH(dir),
c228fd3a 5756 .name = name,
683b57b4
TM		 5757 .page = page,
5758 .bitmask = bitmask,
5759 };
22958463
BH		 5760 struct nfs4_fs_locations_res res = {
5761 .fs_locations = fs_locations,
5762 };
683b57b4
TM		 5763 struct rpc_message msg = {
5764 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5765 .rpc_argp = &args,
22958463 5766 .rpc_resp = &res,
683b57b4
TM		 5767 };
5768 int status;
5769
3110ff80 5770 dprintk("%s: start\n", __func__);
533eb461
AA		 5771
5772 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5773 * is not supported */
5774 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5775 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5776 else
5777 bitmask[0] |= FATTR4_WORD0_FILEID;
5778
c228fd3a 5779 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5780 fs_locations->server = server;
830b8e33 5781 fs_locations->nlocations = 0;
f05d147f 5782 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5783 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5784 return status;
5785}
5786
f05d147f
BS		 5787int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5788 const struct qstr *name,
5789 struct nfs4_fs_locations *fs_locations,
5790 struct page *page)
db0a9593
BS		 5791{
5792 struct nfs4_exception exception = { };
5793 int err;
5794 do {
5795 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5796 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5797 &exception);
5798 } while (exception.retry);
5799 return err;
5800}
5801
5ec16a85
AA		 5802/**
5803 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
5804 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
5805 */
5a5ea0d4
BS		 5806static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5807{
5808 int status;
5809 struct nfs4_secinfo_arg args = {
5810 .dir_fh = NFS_FH(dir),
5811 .name = name,
5812 };
5813 struct nfs4_secinfo_res res = {
5814 .flavors = flavors,
5815 };
5816 struct rpc_message msg = {
5817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5818 .rpc_argp = &args,
5819 .rpc_resp = &res,
5820 };
5ec16a85 5821 struct rpc_clnt *clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5a5ea0d4
BS		 5822
5823 dprintk("NFS call secinfo %s\n", name->name);
5ec16a85 5824 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5a5ea0d4
BS		 5825 dprintk("NFS reply secinfo: %d\n", status);
5826 return status;
5827}
5828
72de53ec
BS		 5829int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5830 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5831{
5832 struct nfs4_exception exception = { };
5833 int err;
5834 do {
5835 err = nfs4_handle_exception(NFS_SERVER(dir),
5836 _nfs4_proc_secinfo(dir, name, flavors),
5837 &exception);
5838 } while (exception.retry);
5839 return err;
5840}
5841
557134a3 5842#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5843/*
5844 * Check the exchange flags returned by the server for invalid flags, having
5845 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5846 * DS flags set.
5847 */
5848static int nfs4_check_cl_exchange_flags(u32 flags)
5849{
5850 if (flags & ~EXCHGID4_FLAG_MASK_R)
5851 goto out_inval;
5852 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5853 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5854 goto out_inval;
5855 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5856 goto out_inval;
5857 return NFS_OK;
5858out_inval:
5859 return -NFS4ERR_INVAL;
5860}
5861
78fe0f41 5862static bool
79d4e1f0
CL		 5863nfs41_same_server_scope(struct nfs41_server_scope *a,
5864 struct nfs41_server_scope *b)
78fe0f41
WAA		 5865{
5866 if (a->server_scope_sz == b->server_scope_sz &&
5867 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5868 return true;
5869
5870 return false;
5871}
5872
7c44f1ae
WAA		 5873/*
5874 * nfs4_proc_bind_conn_to_session()
5875 *
5876 * The 4.1 client currently uses the same TCP connection for the
5877 * fore and backchannel.
5878 */
2cf047c9 5879int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5880{
5881 int status;
5882 struct nfs41_bind_conn_to_session_res res;
5883 struct rpc_message msg = {
5884 .rpc_proc =
5885 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5886 .rpc_argp = clp,
5887 .rpc_resp = &res,
2cf047c9 5888 .rpc_cred = cred,
7c44f1ae
WAA		 5889 };
5890
5891 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5892
5893 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5894 if (unlikely(res.session == NULL)) {
5895 status = -ENOMEM;
5896 goto out;
5897 }
5898
5899 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5900 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5901 if (status == 0) {
5902 if (memcmp(res.session->sess_id.data,
5903 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5904 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5905 status = -EIO;
5906 goto out_session;
5907 }
5908 if (res.dir != NFS4_CDFS4_BOTH) {
5909 dprintk("NFS: %s: Unexpected direction from server\n",
5910 __func__);
5911 status = -EIO;
5912 goto out_session;
5913 }
5914 if (res.use_conn_in_rdma_mode) {
5915 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5916 __func__);
5917 status = -EIO;
5918 goto out_session;
5919 }
5920 }
5921out_session:
5922 kfree(res.session);
5923out:
5924 dprintk("<-- %s status= %d\n", __func__, status);
5925 return status;
5926}
5927
99fe60d0
BH		 5928/*
5929 * nfs4_proc_exchange_id()
5930 *
6bbb4ae8
CL		 5931 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5932 *
99fe60d0
BH		 5933 * Since the clientid has expired, all compounds using sessions
5934 * associated with the stale clientid will be returning
5935 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5936 * be in some phase of session reset.
5937 */
4d643d1d 5938int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5939{
5940 nfs4_verifier verifier;
5941 struct nfs41_exchange_id_args args = {
cd93710e 5942 .verifier = &verifier,
99fe60d0 5943 .client = clp,
4f0b429d
TM		 5944 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5945 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5946 };
5947 struct nfs41_exchange_id_res res = {
32b01310 5948 0
99fe60d0
BH		 5949 };
5950 int status;
5951 struct rpc_message msg = {
5952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5953 .rpc_argp = &args,
5954 .rpc_resp = &res,
5955 .rpc_cred = cred,
5956 };
99fe60d0 5957
f092075d 5958 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5959 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5960 sizeof(args.id));
6bbb4ae8
CL		 5961 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5962 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5963 args.id_len, args.id);
99fe60d0 5964
acdeb69d 5965 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5966 GFP_NOFS);
acdeb69d 5967 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5968 status = -ENOMEM;
5969 goto out;
5970 }
78fe0f41 5971
79d4e1f0 5972 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5973 GFP_NOFS);
177313f1 5974 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5975 status = -ENOMEM;
acdeb69d 5976 goto out_server_owner;
abe9a6d5 5977 }
78fe0f41 5978
bbafffd2 5979 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5980 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5981 status = -ENOMEM;
5982 goto out_server_scope;
5983 }
5984
1bd714f2 5985 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5986 trace_nfs4_exchange_id(clp, status);
177313f1 5987 if (status == 0)
32b01310 5988 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5989
acdeb69d 5990 if (status == 0) {
32b01310
TM		 5991 clp->cl_clientid = res.clientid;
5992 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5993 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5994 clp->cl_seqid = res.seqid;
5995
acdeb69d
CL		 5996 kfree(clp->cl_serverowner);
5997 clp->cl_serverowner = res.server_owner;
5998 res.server_owner = NULL;
78fe0f41 5999
7d2ed9ac 6000 /* use the most recent implementation id */
59155546
CL		 6001 kfree(clp->cl_implid);
6002 clp->cl_implid = res.impl_id;
7d2ed9ac 6003
177313f1 6004 if (clp->cl_serverscope != NULL &&
79d4e1f0 6005 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6006 res.server_scope)) {
6007 dprintk("%s: server_scope mismatch detected\n",
6008 __func__);
6009 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6010 kfree(clp->cl_serverscope);
6011 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6012 }
6013
177313f1 6014 if (clp->cl_serverscope == NULL) {
79d4e1f0 6015 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6016 goto out;
6017 }
32b01310
TM		 6018 } else
6019 kfree(res.impl_id);
7d2ed9ac 6020
acdeb69d
CL		 6021out_server_owner:
6022 kfree(res.server_owner);
7d2ed9ac 6023out_server_scope:
abe9a6d5
WAA		 6024 kfree(res.server_scope);
6025out:
177313f1 6026 if (clp->cl_implid != NULL)
6bbb4ae8 6027 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6028 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6029 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6030 clp->cl_implid->date.seconds,
6031 clp->cl_implid->date.nseconds);
6bbb4ae8 6032 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6033 return status;
6034}
6035
66245539
TM		 6036static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6037 struct rpc_cred *cred)
6038{
6039 struct rpc_message msg = {
6040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6041 .rpc_argp = clp,
6042 .rpc_cred = cred,
6043 };
6044 int status;
6045
6046 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6047 trace_nfs4_destroy_clientid(clp, status);
66245539 6048 if (status)
02c67525 6049 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6050 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6051 return status;
6052}
6053
6054static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6055 struct rpc_cred *cred)
6056{
6057 unsigned int loop;
6058 int ret;
6059
6060 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6061 ret = _nfs4_proc_destroy_clientid(clp, cred);
6062 switch (ret) {
6063 case -NFS4ERR_DELAY:
6064 case -NFS4ERR_CLIENTID_BUSY:
6065 ssleep(1);
6066 break;
6067 default:
6068 return ret;
6069 }
6070 }
6071 return 0;
6072}
6073
6074int nfs4_destroy_clientid(struct nfs_client *clp)
6075{
6076 struct rpc_cred *cred;
6077 int ret = 0;
6078
6079 if (clp->cl_mvops->minor_version < 1)
6080 goto out;
6081 if (clp->cl_exchange_flags == 0)
6082 goto out;
05f4c350
CL		 6083 if (clp->cl_preserve_clid)
6084 goto out;
73d8bde5 6085 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6086 ret = nfs4_proc_destroy_clientid(clp, cred);
6087 if (cred)
6088 put_rpccred(cred);
6089 switch (ret) {
6090 case 0:
6091 case -NFS4ERR_STALE_CLIENTID:
6092 clp->cl_exchange_flags = 0;
6093 }
6094out:
6095 return ret;
6096}
6097
2050f0cc
AA		 6098struct nfs4_get_lease_time_data {
6099 struct nfs4_get_lease_time_args *args;
6100 struct nfs4_get_lease_time_res *res;
6101 struct nfs_client *clp;
6102};
6103
6104static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6105 void *calldata)
6106{
2050f0cc
AA		 6107 struct nfs4_get_lease_time_data *data =
6108 (struct nfs4_get_lease_time_data *)calldata;
6109
6110 dprintk("--> %s\n", __func__);
6111 /* just setup sequence, do not trigger session recovery
6112 since we're invoked within one */
d9afbd1b
TM		 6113 nfs41_setup_sequence(data->clp->cl_session,
6114 &data->args->la_seq_args,
6115 &data->res->lr_seq_res,
6116 task);
2050f0cc
AA		 6117 dprintk("<-- %s\n", __func__);
6118}
6119
6120/*
6121 * Called from nfs4_state_manager thread for session setup, so don't recover
6122 * from sequence operation or clientid errors.
6123 */
6124static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6125{
6126 struct nfs4_get_lease_time_data *data =
6127 (struct nfs4_get_lease_time_data *)calldata;
6128
6129 dprintk("--> %s\n", __func__);
14516c3a
TM		 6130 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6131 return;
2050f0cc
AA		 6132 switch (task->tk_status) {
6133 case -NFS4ERR_DELAY:
6134 case -NFS4ERR_GRACE:
6135 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6136 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6137 task->tk_status = 0;
a8a4ae3a
AA		 6138 /* fall through */
6139 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6140 rpc_restart_call_prepare(task);
2050f0cc
AA		 6141 return;
6142 }
2050f0cc
AA		 6143 dprintk("<-- %s\n", __func__);
6144}
6145
17280175 6146static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6147 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6148 .rpc_call_done = nfs4_get_lease_time_done,
6149};
6150
6151int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6152{
6153 struct rpc_task *task;
6154 struct nfs4_get_lease_time_args args;
6155 struct nfs4_get_lease_time_res res = {
6156 .lr_fsinfo = fsinfo,
6157 };
6158 struct nfs4_get_lease_time_data data = {
6159 .args = &args,
6160 .res = &res,
6161 .clp = clp,
6162 };
6163 struct rpc_message msg = {
6164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6165 .rpc_argp = &args,
6166 .rpc_resp = &res,
6167 };
6168 struct rpc_task_setup task_setup = {
6169 .rpc_client = clp->cl_rpcclient,
6170 .rpc_message = &msg,
6171 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6172 .callback_data = &data,
6173 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6174 };
6175 int status;
6176
9d12b216 6177 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6178 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6179 dprintk("--> %s\n", __func__);
6180 task = rpc_run_task(&task_setup);
6181
6182 if (IS_ERR(task))
6183 status = PTR_ERR(task);
6184 else {
6185 status = task->tk_status;
6186 rpc_put_task(task);
6187 }
6188 dprintk("<-- %s return %d\n", __func__, status);
6189
6190 return status;
6191}
6192
fc931582
AA		 6193/*
6194 * Initialize the values to be used by the client in CREATE_SESSION
6195 * If nfs4_init_session set the fore channel request and response sizes,
6196 * use them.
6197 *
6198 * Set the back channel max_resp_sz_cached to zero to force the client to
6199 * always set csa_cachethis to FALSE because the current implementation
6200 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6201 */
6202static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6203{
18aad3d5
AA		 6204 unsigned int max_rqst_sz, max_resp_sz;
6205
6206 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6207 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6208
fc931582 6209 /* Fore channel attributes */
18aad3d5
AA		 6210 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6211 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6212 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6213 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6214
6215 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6216 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6217 __func__,
6218 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6219 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6220
6221 /* Back channel attributes */
fc931582
AA		 6222 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6223 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6224 args->bc_attrs.max_resp_sz_cached = 0;
6225 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6226 args->bc_attrs.max_reqs = 1;
6227
6228 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6229 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6230 __func__,
6231 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6232 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6233 args->bc_attrs.max_reqs);
6234}
6235
43c2e885 6236static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6237{
43c2e885
BF		 6238 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6239 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6240
43c2e885
BF		 6241 if (rcvd->max_resp_sz > sent->max_resp_sz)
6242 return -EINVAL;
6243 /*
6244 * Our requested max_ops is the minimum we need; we're not
6245 * prepared to break up compounds into smaller pieces than that.
6246 * So, no point even trying to continue if the server won't
6247 * cooperate:
6248 */
6249 if (rcvd->max_ops < sent->max_ops)
6250 return -EINVAL;
6251 if (rcvd->max_reqs == 0)
6252 return -EINVAL;
b4b9a0c1
VG		 6253 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6254 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6255 return 0;
8d35301d
AA		 6256}
6257
43c2e885
BF		 6258static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6259{
6260 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6261 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6262
43c2e885
BF		 6263 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6264 return -EINVAL;
6265 if (rcvd->max_resp_sz < sent->max_resp_sz)
6266 return -EINVAL;
6267 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6268 return -EINVAL;
6269 /* These would render the backchannel useless: */
b4b9a0c1 6270 if (rcvd->max_ops != sent->max_ops)
43c2e885 6271 return -EINVAL;
b4b9a0c1 6272 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6273 return -EINVAL;
6274 return 0;
6275}
8d35301d 6276
8d35301d
AA		 6277static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6278 struct nfs4_session *session)
6279{
43c2e885 6280 int ret;
8d35301d 6281
43c2e885
BF		 6282 ret = nfs4_verify_fore_channel_attrs(args, session);
6283 if (ret)
6284 return ret;
6285 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6286}
6287
848f5bda
TM		 6288static int _nfs4_proc_create_session(struct nfs_client *clp,
6289 struct rpc_cred *cred)
fc931582
AA		 6290{
6291 struct nfs4_session *session = clp->cl_session;
6292 struct nfs41_create_session_args args = {
6293 .client = clp,
6294 .cb_program = NFS4_CALLBACK,
6295 };
6296 struct nfs41_create_session_res res = {
6297 .client = clp,
6298 };
6299 struct rpc_message msg = {
6300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6301 .rpc_argp = &args,
6302 .rpc_resp = &res,
848f5bda 6303 .rpc_cred = cred,
fc931582
AA		 6304 };
6305 int status;
6306
6307 nfs4_init_channel_attrs(&args);
0f91421e 6308 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6309
1bd714f2 6310 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6311 trace_nfs4_create_session(clp, status);
fc931582 6312
43095d39 6313 if (!status) {
8d35301d
AA		 6314 /* Verify the session's negotiated channel_attrs values */
6315 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6316 /* Increment the clientid slot sequence id */
6317 clp->cl_seqid++;
6318 }
6319
6320 return status;
6321}
6322
6323/*
6324 * Issues a CREATE_SESSION operation to the server.
6325 * It is the responsibility of the caller to verify the session is
6326 * expired before calling this routine.
6327 */
848f5bda 6328int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6329{
6330 int status;
6331 unsigned *ptr;
fc931582
AA		 6332 struct nfs4_session *session = clp->cl_session;
6333
6334 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6335
848f5bda 6336 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6337 if (status)
6338 goto out;
6339
aacd5537
AA		 6340 /* Init or reset the session slot tables */
6341 status = nfs4_setup_session_slot_tables(session);
6342 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6343 if (status)
6344 goto out;
6345
6346 ptr = (unsigned *)&session->sess_id.data[0];
6347 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6348 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6349out:
6350 dprintk("<-- %s\n", __func__);
6351 return status;
6352}
6353
0f3e66c6
AA		 6354/*
6355 * Issue the over-the-wire RPC DESTROY_SESSION.
6356 * The caller must serialize access to this routine.
6357 */
848f5bda
TM		 6358int nfs4_proc_destroy_session(struct nfs4_session *session,
6359 struct rpc_cred *cred)
0f3e66c6 6360{
848f5bda
TM		 6361 struct rpc_message msg = {
6362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6363 .rpc_argp = session,
6364 .rpc_cred = cred,
6365 };
0f3e66c6 6366 int status = 0;
0f3e66c6
AA		 6367
6368 dprintk("--> nfs4_proc_destroy_session\n");
6369
6370 /* session is still being setup */
6371 if (session->clp->cl_cons_state != NFS_CS_READY)
6372 return status;
6373
1bd714f2 6374 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6375 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6376
6377 if (status)
08106ac7 6378 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6379 "Session has been destroyed regardless...\n", status);
6380
6381 dprintk("<-- nfs4_proc_destroy_session\n");
6382 return status;
6383}
6384
fc01cea9
AA		 6385/*
6386 * Renew the cl_session lease.
6387 */
d5f8d3fe
TM		 6388struct nfs4_sequence_data {
6389 struct nfs_client *clp;
6390 struct nfs4_sequence_args args;
6391 struct nfs4_sequence_res res;
6392};
6393
dc96aef9
AB		 6394static void nfs41_sequence_release(void *data)
6395{
d5f8d3fe
TM		 6396 struct nfs4_sequence_data *calldata = data;
6397 struct nfs_client *clp = calldata->clp;
dc96aef9 6398
7135840f
AB		 6399 if (atomic_read(&clp->cl_count) > 1)
6400 nfs4_schedule_state_renewal(clp);
6401 nfs_put_client(clp);
d5f8d3fe 6402 kfree(calldata);
dc96aef9
AB		 6403}
6404
aa5190d0
TM		 6405static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6406{
6407 switch(task->tk_status) {
6408 case -NFS4ERR_DELAY:
aa5190d0
TM		 6409 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6410 return -EAGAIN;
6411 default:
0400a6b0 6412 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6413 }
6414 return 0;
6415}
6416
dc96aef9 6417static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6418{
d5f8d3fe
TM		 6419 struct nfs4_sequence_data *calldata = data;
6420 struct nfs_client *clp = calldata->clp;
fc01cea9 6421
14516c3a
TM		 6422 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6423 return;
fc01cea9 6424
c6d01c6f 6425 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6426 if (task->tk_status < 0) {
6427 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6428 if (atomic_read(&clp->cl_count) == 1)
6429 goto out;
fc01cea9 6430
aa5190d0
TM		 6431 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6432 rpc_restart_call_prepare(task);
fc01cea9
AA		 6433 return;
6434 }
6435 }
fc01cea9 6436 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6437out:
fc01cea9
AA		 6438 dprintk("<-- %s\n", __func__);
6439}
6440
6441static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6442{
d5f8d3fe
TM		 6443 struct nfs4_sequence_data *calldata = data;
6444 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6445 struct nfs4_sequence_args *args;
6446 struct nfs4_sequence_res *res;
6447
fc01cea9
AA		 6448 args = task->tk_msg.rpc_argp;
6449 res = task->tk_msg.rpc_resp;
6450
d9afbd1b 6451 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6452}
6453
6454static const struct rpc_call_ops nfs41_sequence_ops = {
6455 .rpc_call_done = nfs41_sequence_call_done,
6456 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6457 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6458};
6459
8fe72bac
TM		 6460static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6461 struct rpc_cred *cred,
6462 bool is_privileged)
fc01cea9 6463{
d5f8d3fe 6464 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6465 struct rpc_message msg = {
6466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6467 .rpc_cred = cred,
6468 };
71ac6da9
TM		 6469 struct rpc_task_setup task_setup_data = {
6470 .rpc_client = clp->cl_rpcclient,
6471 .rpc_message = &msg,
8fe72bac 6472 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6473 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6474 };
fc01cea9 6475
7135840f 6476 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6477 return ERR_PTR(-EIO);
dfb4f309 6478 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6479 if (calldata == NULL) {
7135840f 6480 nfs_put_client(clp);
71ac6da9 6481 return ERR_PTR(-ENOMEM);
fc01cea9 6482 }
9d12b216 6483 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6484 if (is_privileged)
6485 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6486 msg.rpc_argp = &calldata->args;
6487 msg.rpc_resp = &calldata->res;
6488 calldata->clp = clp;
71ac6da9 6489 task_setup_data.callback_data = calldata;
fc01cea9 6490
71ac6da9
TM		 6491 return rpc_run_task(&task_setup_data);
6492}
6493
2f60ea6b 6494static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6495{
6496 struct rpc_task *task;
6497 int ret = 0;
6498
2f60ea6b
TM		 6499 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6500 return 0;
8fe72bac 6501 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6502 if (IS_ERR(task))
6503 ret = PTR_ERR(task);
6504 else
bf294b41 6505 rpc_put_task_async(task);
71ac6da9
TM		 6506 dprintk("<-- %s status=%d\n", __func__, ret);
6507 return ret;
6508}
6509
6510static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6511{
6512 struct rpc_task *task;
6513 int ret;
6514
8fe72bac 6515 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6516 if (IS_ERR(task)) {
6517 ret = PTR_ERR(task);
6518 goto out;
6519 }
6520 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6521 if (!ret) {
6522 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6523
6524 if (task->tk_status == 0)
6525 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6526 ret = task->tk_status;
b4410c2f 6527 }
71ac6da9
TM		 6528 rpc_put_task(task);
6529out:
6530 dprintk("<-- %s status=%d\n", __func__, ret);
6531 return ret;
fc01cea9
AA		 6532}
6533
fce5c838
RL		 6534struct nfs4_reclaim_complete_data {
6535 struct nfs_client *clp;
6536 struct nfs41_reclaim_complete_args arg;
6537 struct nfs41_reclaim_complete_res res;
6538};
6539
6540static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6541{
6542 struct nfs4_reclaim_complete_data *calldata = data;
6543
d9afbd1b
TM		 6544 nfs41_setup_sequence(calldata->clp->cl_session,
6545 &calldata->arg.seq_args,
6546 &calldata->res.seq_res,
6547 task);
fce5c838
RL		 6548}
6549
aa5190d0
TM		 6550static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6551{
6552 switch(task->tk_status) {
6553 case 0:
6554 case -NFS4ERR_COMPLETE_ALREADY:
6555 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6556 break;
6557 case -NFS4ERR_DELAY:
aa5190d0 6558 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6559 /* fall through */
6560 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6561 return -EAGAIN;
6562 default:
0400a6b0 6563 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6564 }
6565 return 0;
6566}
6567
fce5c838
RL		 6568static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6569{
6570 struct nfs4_reclaim_complete_data *calldata = data;
6571 struct nfs_client *clp = calldata->clp;
6572 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6573
6574 dprintk("--> %s\n", __func__);
14516c3a
TM		 6575 if (!nfs41_sequence_done(task, res))
6576 return;
fce5c838 6577
c6d01c6f 6578 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6579 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6580 rpc_restart_call_prepare(task);
6581 return;
6582 }
fce5c838
RL		 6583 dprintk("<-- %s\n", __func__);
6584}
6585
6586static void nfs4_free_reclaim_complete_data(void *data)
6587{
6588 struct nfs4_reclaim_complete_data *calldata = data;
6589
6590 kfree(calldata);
6591}
6592
6593static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6594 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6595 .rpc_call_done = nfs4_reclaim_complete_done,
6596 .rpc_release = nfs4_free_reclaim_complete_data,
6597};
6598
6599/*
6600 * Issue a global reclaim complete.
6601 */
965e9c23
TM		 6602static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6603 struct rpc_cred *cred)
fce5c838
RL		 6604{
6605 struct nfs4_reclaim_complete_data *calldata;
6606 struct rpc_task *task;
6607 struct rpc_message msg = {
6608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6609 .rpc_cred = cred,
fce5c838
RL		 6610 };
6611 struct rpc_task_setup task_setup_data = {
6612 .rpc_client = clp->cl_rpcclient,
6613 .rpc_message = &msg,
6614 .callback_ops = &nfs4_reclaim_complete_call_ops,
6615 .flags = RPC_TASK_ASYNC,
6616 };
6617 int status = -ENOMEM;
6618
6619 dprintk("--> %s\n", __func__);
8535b2be 6620 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6621 if (calldata == NULL)
6622 goto out;
6623 calldata->clp = clp;
6624 calldata->arg.one_fs = 0;
fce5c838 6625
9d12b216 6626 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6627 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6628 msg.rpc_argp = &calldata->arg;
6629 msg.rpc_resp = &calldata->res;
6630 task_setup_data.callback_data = calldata;
6631 task = rpc_run_task(&task_setup_data);
acf82b85 6632 if (IS_ERR(task)) {
fce5c838 6633 status = PTR_ERR(task);
acf82b85
DC		 6634 goto out;
6635 }
c34c32ea
AA		 6636 status = nfs4_wait_for_completion_rpc_task(task);
6637 if (status == 0)
6638 status = task->tk_status;
fce5c838 6639 rpc_put_task(task);
acf82b85 6640 return 0;
fce5c838
RL		 6641out:
6642 dprintk("<-- %s status=%d\n", __func__, status);
6643 return status;
6644}
b1f69b75
AA		 6645
6646static void
6647nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6648{
6649 struct nfs4_layoutget *lgp = calldata;
c31663d4 6650 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6651 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6652
6653 dprintk("--> %s\n", __func__);
c31663d4
FI		 6654 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6655 * right now covering the LAYOUTGET we are about to send.
6656 * However, that is not so catastrophic, and there seems
6657 * to be no way to prevent it completely.
6658 */
6ba7db34 6659 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6660 &lgp->res.seq_res, task))
b1f69b75 6661 return;
cf7d63f1
FI		 6662 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6663 NFS_I(lgp->args.inode)->layout,
6664 lgp->args.ctx->state)) {
6665 rpc_exit(task, NFS4_OK);
cf7d63f1 6666 }
b1f69b75
AA		 6667}
6668
6669static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6670{
6671 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6672 struct inode *inode = lgp->args.inode;
6673 struct nfs_server *server = NFS_SERVER(inode);
6674 struct pnfs_layout_hdr *lo;
6675 struct nfs4_state *state = NULL;
30005121 6676 unsigned long timeo, giveup;
b1f69b75
AA		 6677
6678 dprintk("--> %s\n", __func__);
6679
6ba7db34 6680 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6681 goto out;
b1f69b75
AA		 6682
6683 switch (task->tk_status) {
6684 case 0:
ee314c2a 6685 goto out;
b1f69b75
AA		 6686 case -NFS4ERR_LAYOUTTRYLATER:
6687 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6688 timeo = rpc_get_timeout(task->tk_client);
6689 giveup = lgp->args.timestamp + timeo;
6690 if (time_after(giveup, jiffies))
6691 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6692 break;
6693 case -NFS4ERR_EXPIRED:
6694 case -NFS4ERR_BAD_STATEID:
6695 spin_lock(&inode->i_lock);
6696 lo = NFS_I(inode)->layout;
6697 if (!lo || list_empty(&lo->plh_segs)) {
6698 spin_unlock(&inode->i_lock);
6699 /* If the open stateid was bad, then recover it. */
6700 state = lgp->args.ctx->state;
6701 } else {
6702 LIST_HEAD(head);
6703
6704 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6705 spin_unlock(&inode->i_lock);
6706 /* Mark the bad layout state as invalid, then
6707 * retry using the open stateid. */
6708 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6709 }
6710 }
ee314c2a
TM		 6711 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6712 rpc_restart_call_prepare(task);
6713out:
b1f69b75
AA		 6714 dprintk("<-- %s\n", __func__);
6715}
6716
8554116e
IK		 6717static size_t max_response_pages(struct nfs_server *server)
6718{
6719 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6720 return nfs_page_array_len(0, max_resp_sz);
6721}
6722
6723static void nfs4_free_pages(struct page **pages, size_t size)
6724{
6725 int i;
6726
6727 if (!pages)
6728 return;
6729
6730 for (i = 0; i < size; i++) {
6731 if (!pages[i])
6732 break;
6733 __free_page(pages[i]);
6734 }
6735 kfree(pages);
6736}
6737
6738static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6739{
6740 struct page **pages;
6741 int i;
6742
6743 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6744 if (!pages) {
6745 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6746 return NULL;
6747 }
6748
6749 for (i = 0; i < size; i++) {
6750 pages[i] = alloc_page(gfp_flags);
6751 if (!pages[i]) {
6752 dprintk("%s: failed to allocate page\n", __func__);
6753 nfs4_free_pages(pages, size);
6754 return NULL;
6755 }
6756 }
6757
6758 return pages;
6759}
6760
b1f69b75
AA		 6761static void nfs4_layoutget_release(void *calldata)
6762{
6763 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6764 struct inode *inode = lgp->args.inode;
6765 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6766 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6767
6768 dprintk("--> %s\n", __func__);
8554116e 6769 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6770 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6771 put_nfs_open_context(lgp->args.ctx);
6772 kfree(calldata);
6773 dprintk("<-- %s\n", __func__);
6774}
6775
6776static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6777 .rpc_call_prepare = nfs4_layoutget_prepare,
6778 .rpc_call_done = nfs4_layoutget_done,
6779 .rpc_release = nfs4_layoutget_release,
6780};
6781
a0b0a6e3
TM		 6782struct pnfs_layout_segment *
6783nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6784{
a47970ff
WAA		 6785 struct inode *inode = lgp->args.inode;
6786 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6787 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6788 struct rpc_task *task;
6789 struct rpc_message msg = {
6790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6791 .rpc_argp = &lgp->args,
6792 .rpc_resp = &lgp->res,
6ab59344 6793 .rpc_cred = lgp->cred,
b1f69b75
AA		 6794 };
6795 struct rpc_task_setup task_setup_data = {
6796 .rpc_client = server->client,
6797 .rpc_message = &msg,
6798 .callback_ops = &nfs4_layoutget_call_ops,
6799 .callback_data = lgp,
6800 .flags = RPC_TASK_ASYNC,
6801 };
a0b0a6e3 6802 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6803 int status = 0;
6804
6805 dprintk("--> %s\n", __func__);
6806
8554116e
IK		 6807 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6808 if (!lgp->args.layout.pages) {
6809 nfs4_layoutget_release(lgp);
a0b0a6e3 6810 return ERR_PTR(-ENOMEM);
8554116e
IK		 6811 }
6812 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6813 lgp->args.timestamp = jiffies;
8554116e 6814
35124a09 6815 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6816 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6817 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6818
6819 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6820 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6821
b1f69b75
AA		 6822 task = rpc_run_task(&task_setup_data);
6823 if (IS_ERR(task))
a0b0a6e3 6824 return ERR_CAST(task);
b1f69b75 6825 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6826 if (status == 0)
6827 status = task->tk_status;
085b7a45
WAA		 6828 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6829 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6830 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6831 rpc_put_task(task);
6832 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6833 if (status)
6834 return ERR_PTR(status);
6835 return lseg;
b1f69b75
AA		 6836}
6837
cbe82603
BH		 6838static void
6839nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6840{
6841 struct nfs4_layoutreturn *lrp = calldata;
6842
6843 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6844 nfs41_setup_sequence(lrp->clp->cl_session,
6845 &lrp->args.seq_args,
6846 &lrp->res.seq_res,
6847 task);
cbe82603
BH		 6848}
6849
6850static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6851{
6852 struct nfs4_layoutreturn *lrp = calldata;
6853 struct nfs_server *server;
6854
6855 dprintk("--> %s\n", __func__);
6856
6ba7db34 6857 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6858 return;
6859
6860 server = NFS_SERVER(lrp->args.inode);
6861 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6862 rpc_restart_call_prepare(task);
cbe82603
BH		 6863 return;
6864 }
cbe82603
BH		 6865 dprintk("<-- %s\n", __func__);
6866}
6867
6868static void nfs4_layoutreturn_release(void *calldata)
6869{
6870 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6871 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6872
6873 dprintk("--> %s\n", __func__);
849b286f
TM		 6874 spin_lock(&lo->plh_inode->i_lock);
6875 if (lrp->res.lrs_present)
6876 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6877 lo->plh_block_lgets--;
6878 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6879 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6880 kfree(calldata);
6881 dprintk("<-- %s\n", __func__);
6882}
6883
6884static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6885 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6886 .rpc_call_done = nfs4_layoutreturn_done,
6887 .rpc_release = nfs4_layoutreturn_release,
6888};
6889
6890int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6891{
6892 struct rpc_task *task;
6893 struct rpc_message msg = {
6894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6895 .rpc_argp = &lrp->args,
6896 .rpc_resp = &lrp->res,
9556000d 6897 .rpc_cred = lrp->cred,
cbe82603
BH		 6898 };
6899 struct rpc_task_setup task_setup_data = {
1771c577 6900 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6901 .rpc_message = &msg,
6902 .callback_ops = &nfs4_layoutreturn_call_ops,
6903 .callback_data = lrp,
6904 };
6905 int status;
6906
6907 dprintk("--> %s\n", __func__);
9d12b216 6908 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6909 task = rpc_run_task(&task_setup_data);
6910 if (IS_ERR(task))
6911 return PTR_ERR(task);
6912 status = task->tk_status;
6913 dprintk("<-- %s status=%d\n", __func__, status);
6914 rpc_put_task(task);
6915 return status;
6916}
6917
7f11d8d3
AA		 6918/*
6919 * Retrieve the list of Data Server devices from the MDS.
6920 */
6921static int _nfs4_getdevicelist(struct nfs_server *server,
6922 const struct nfs_fh *fh,
6923 struct pnfs_devicelist *devlist)
6924{
6925 struct nfs4_getdevicelist_args args = {
6926 .fh = fh,
6927 .layoutclass = server->pnfs_curr_ld->id,
6928 };
6929 struct nfs4_getdevicelist_res res = {
6930 .devlist = devlist,
6931 };
6932 struct rpc_message msg = {
6933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6934 .rpc_argp = &args,
6935 .rpc_resp = &res,
6936 };
6937 int status;
6938
6939 dprintk("--> %s\n", __func__);
6940 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6941 &res.seq_res, 0);
6942 dprintk("<-- %s status=%d\n", __func__, status);
6943 return status;
6944}
6945
6946int nfs4_proc_getdevicelist(struct nfs_server *server,
6947 const struct nfs_fh *fh,
6948 struct pnfs_devicelist *devlist)
6949{
6950 struct nfs4_exception exception = { };
6951 int err;
6952
6953 do {
6954 err = nfs4_handle_exception(server,
6955 _nfs4_getdevicelist(server, fh, devlist),
6956 &exception);
6957 } while (exception.retry);
6958
6959 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6960 err, devlist->num_devs);
6961
6962 return err;
6963}
6964EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6965
b1f69b75 6966static int
cd5875fe
TM		 6967_nfs4_proc_getdeviceinfo(struct nfs_server *server,
6968 struct pnfs_device *pdev,
6969 struct rpc_cred *cred)
b1f69b75
AA		 6970{
6971 struct nfs4_getdeviceinfo_args args = {
6972 .pdev = pdev,
6973 };
6974 struct nfs4_getdeviceinfo_res res = {
6975 .pdev = pdev,
6976 };
6977 struct rpc_message msg = {
6978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6979 .rpc_argp = &args,
6980 .rpc_resp = &res,
cd5875fe 6981 .rpc_cred = cred,
b1f69b75
AA		 6982 };
6983 int status;
6984
6985 dprintk("--> %s\n", __func__);
7c513058 6986 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6987 dprintk("<-- %s status=%d\n", __func__, status);
6988
6989 return status;
6990}
6991
cd5875fe
TM		 6992int nfs4_proc_getdeviceinfo(struct nfs_server *server,
6993 struct pnfs_device *pdev,
6994 struct rpc_cred *cred)
b1f69b75
AA		 6995{
6996 struct nfs4_exception exception = { };
6997 int err;
6998
6999 do {
7000 err = nfs4_handle_exception(server,
cd5875fe 7001 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7002 &exception);
7003 } while (exception.retry);
7004 return err;
7005}
7006EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7007
863a3c6c
AA		 7008static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7009{
7010 struct nfs4_layoutcommit_data *data = calldata;
7011 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7012 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7013
d9afbd1b
TM		 7014 nfs41_setup_sequence(session,
7015 &data->args.seq_args,
7016 &data->res.seq_res,
7017 task);
863a3c6c
AA		 7018}
7019
7020static void
7021nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7022{
7023 struct nfs4_layoutcommit_data *data = calldata;
7024 struct nfs_server *server = NFS_SERVER(data->args.inode);
7025
6ba7db34 7026 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7027 return;
7028
7029 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7030 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7031 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7032 case -NFS4ERR_BADLAYOUT: /* no layout */
7033 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7034 task->tk_status = 0;
e59d27e0
TM		 7035 break;
7036 case 0:
863a3c6c
AA		 7037 nfs_post_op_update_inode_force_wcc(data->args.inode,
7038 data->res.fattr);
e59d27e0
TM		 7039 break;
7040 default:
7041 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7042 rpc_restart_call_prepare(task);
7043 return;
7044 }
7045 }
863a3c6c
AA		 7046}
7047
7048static void nfs4_layoutcommit_release(void *calldata)
7049{
7050 struct nfs4_layoutcommit_data *data = calldata;
7051
db29c089 7052 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7053 put_rpccred(data->cred);
7054 kfree(data);
7055}
7056
7057static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7058 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7059 .rpc_call_done = nfs4_layoutcommit_done,
7060 .rpc_release = nfs4_layoutcommit_release,
7061};
7062
7063int
ef311537 7064nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7065{
7066 struct rpc_message msg = {
7067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7068 .rpc_argp = &data->args,
7069 .rpc_resp = &data->res,
7070 .rpc_cred = data->cred,
7071 };
7072 struct rpc_task_setup task_setup_data = {
7073 .task = &data->task,
7074 .rpc_client = NFS_CLIENT(data->args.inode),
7075 .rpc_message = &msg,
7076 .callback_ops = &nfs4_layoutcommit_ops,
7077 .callback_data = data,
7078 .flags = RPC_TASK_ASYNC,
7079 };
7080 struct rpc_task *task;
7081 int status = 0;
7082
7083 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7084 "lbw: %llu inode %lu\n",
7085 data->task.tk_pid, sync,
7086 data->args.lastbytewritten,
7087 data->args.inode->i_ino);
7088
9d12b216 7089 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7090 task = rpc_run_task(&task_setup_data);
7091 if (IS_ERR(task))
7092 return PTR_ERR(task);
ef311537 7093 if (sync == false)
863a3c6c
AA		 7094 goto out;
7095 status = nfs4_wait_for_completion_rpc_task(task);
7096 if (status != 0)
7097 goto out;
7098 status = task->tk_status;
7099out:
7100 dprintk("%s: status %d\n", __func__, status);
7101 rpc_put_task(task);
7102 return status;
7103}
fca78d6d 7104
97431204
AA		 7105/**
7106 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7107 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7108 */
fca78d6d
BS		 7109static int
7110_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7111 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7112{
7113 struct nfs41_secinfo_no_name_args args = {
7114 .style = SECINFO_STYLE_CURRENT_FH,
7115 };
7116 struct nfs4_secinfo_res res = {
7117 .flavors = flavors,
7118 };
7119 struct rpc_message msg = {
7120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7121 .rpc_argp = &args,
7122 .rpc_resp = &res,
7123 };
97431204
AA		 7124 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7125 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7126}
7127
7128static int
7129nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7130 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7131{
7132 struct nfs4_exception exception = { };
7133 int err;
7134 do {
7135 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7136 switch (err) {
7137 case 0:
7138 case -NFS4ERR_WRONGSEC:
7139 case -NFS4ERR_NOTSUPP:
05e9cfb4 7140 goto out;
fca78d6d
BS		 7141 default:
7142 err = nfs4_handle_exception(server, err, &exception);
7143 }
7144 } while (exception.retry);
05e9cfb4 7145out:
fca78d6d
BS		 7146 return err;
7147}
7148
7149static int
7150nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7151 struct nfs_fsinfo *info)
7152{
7153 int err;
7154 struct page *page;
7155 rpc_authflavor_t flavor;
7156 struct nfs4_secinfo_flavors *flavors;
7157
7158 page = alloc_page(GFP_KERNEL);
7159 if (!page) {
7160 err = -ENOMEM;
7161 goto out;
7162 }
7163
7164 flavors = page_address(page);
7165 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7166
7167 /*
7168 * Fall back on "guess and check" method if
7169 * the server doesn't support SECINFO_NO_NAME
7170 */
7171 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7172 err = nfs4_find_root_sec(server, fhandle, info);
7173 goto out_freepage;
7174 }
7175 if (err)
7176 goto out_freepage;
7177
7178 flavor = nfs_find_best_sec(flavors);
7179 if (err == 0)
7180 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7181
7182out_freepage:
7183 put_page(page);
7184 if (err == -EACCES)
7185 return -EPERM;
7186out:
7187 return err;
7188}
1cab0652 7189
ab7cb0df
TM		 7190static int _nfs41_test_stateid(struct nfs_server *server,
7191 nfs4_stateid *stateid,
7192 struct rpc_cred *cred)
7d974794
BS		 7193{
7194 int status;
7195 struct nfs41_test_stateid_args args = {
1cab0652 7196 .stateid = stateid,
7d974794
BS		 7197 };
7198 struct nfs41_test_stateid_res res;
7199 struct rpc_message msg = {
7200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7201 .rpc_argp = &args,
7202 .rpc_resp = &res,
ab7cb0df 7203 .rpc_cred = cred,
7d974794 7204 };
1cab0652 7205
38527b15 7206 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7207 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7208 nfs4_set_sequence_privileged(&args.seq_args);
7209 status = nfs4_call_sync_sequence(server->client, server, &msg,
7210 &args.seq_args, &res.seq_res);
38527b15
CL		 7211 if (status != NFS_OK) {
7212 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7213 return status;
38527b15
CL		 7214 }
7215 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7216 return -res.status;
7d974794
BS		 7217}
7218
38527b15
CL		 7219/**
7220 * nfs41_test_stateid - perform a TEST_STATEID operation
7221 *
7222 * @server: server / transport on which to perform the operation
7223 * @stateid: state ID to test
ab7cb0df 7224 * @cred: credential
38527b15
CL		 7225 *
7226 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7227 * Otherwise a negative NFS4ERR value is returned if the operation
7228 * failed or the state ID is not currently valid.
7229 */
ab7cb0df
TM		 7230static int nfs41_test_stateid(struct nfs_server *server,
7231 nfs4_stateid *stateid,
7232 struct rpc_cred *cred)
7d974794
BS		 7233{
7234 struct nfs4_exception exception = { };
7235 int err;
7236 do {
ab7cb0df 7237 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7238 if (err != -NFS4ERR_DELAY)
7239 break;
7240 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7241 } while (exception.retry);
7242 return err;
7243}
9aeda35f 7244
7c1d5fae
TM		 7245struct nfs_free_stateid_data {
7246 struct nfs_server *server;
7247 struct nfs41_free_stateid_args args;
9aeda35f 7248 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7249};
7250
7251static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7252{
7253 struct nfs_free_stateid_data *data = calldata;
7254 nfs41_setup_sequence(nfs4_get_session(data->server),
7255 &data->args.seq_args,
7256 &data->res.seq_res,
7257 task);
7258}
7259
7260static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7261{
7262 struct nfs_free_stateid_data *data = calldata;
7263
7264 nfs41_sequence_done(task, &data->res.seq_res);
7265
7266 switch (task->tk_status) {
7267 case -NFS4ERR_DELAY:
7268 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7269 rpc_restart_call_prepare(task);
7270 }
7271}
7272
7273static void nfs41_free_stateid_release(void *calldata)
7274{
7275 kfree(calldata);
7276}
7277
17f26b12 7278static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7279 .rpc_call_prepare = nfs41_free_stateid_prepare,
7280 .rpc_call_done = nfs41_free_stateid_done,
7281 .rpc_release = nfs41_free_stateid_release,
7282};
7283
7284static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7285 nfs4_stateid *stateid,
ab7cb0df 7286 struct rpc_cred *cred,
7c1d5fae
TM		 7287 bool privileged)
7288{
9aeda35f
BS		 7289 struct rpc_message msg = {
7290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7291 .rpc_cred = cred,
9aeda35f 7292 };
7c1d5fae
TM		 7293 struct rpc_task_setup task_setup = {
7294 .rpc_client = server->client,
7295 .rpc_message = &msg,
7296 .callback_ops = &nfs41_free_stateid_ops,
7297 .flags = RPC_TASK_ASYNC,
7298 };
7299 struct nfs_free_stateid_data *data;
9aeda35f 7300
38527b15 7301 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7302 data = kmalloc(sizeof(*data), GFP_NOFS);
7303 if (!data)
7304 return ERR_PTR(-ENOMEM);
7305 data->server = server;
7306 nfs4_stateid_copy(&data->args.stateid, stateid);
7307
7308 task_setup.callback_data = data;
7309
7310 msg.rpc_argp = &data->args;
7311 msg.rpc_resp = &data->res;
7312 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7313 if (privileged)
7314 nfs4_set_sequence_privileged(&data->args.seq_args);
7315
7316 return rpc_run_task(&task_setup);
9aeda35f
BS		 7317}
7318
38527b15
CL		 7319/**
7320 * nfs41_free_stateid - perform a FREE_STATEID operation
7321 *
7322 * @server: server / transport on which to perform the operation
7323 * @stateid: state ID to release
ab7cb0df 7324 * @cred: credential
38527b15
CL		 7325 *
7326 * Returns NFS_OK if the server freed "stateid". Otherwise a
7327 * negative NFS4ERR value is returned.
7328 */
ab7cb0df
TM		 7329static int nfs41_free_stateid(struct nfs_server *server,
7330 nfs4_stateid *stateid,
7331 struct rpc_cred *cred)
9aeda35f 7332{
7c1d5fae
TM		 7333 struct rpc_task *task;
7334 int ret;
7335
ab7cb0df 7336 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7337 if (IS_ERR(task))
7338 return PTR_ERR(task);
7339 ret = rpc_wait_for_completion_task(task);
7340 if (!ret)
7341 ret = task->tk_status;
7342 rpc_put_task(task);
7343 return ret;
9aeda35f 7344}
36281caa 7345
c8b2d0bf
TM		 7346static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7347{
7348 struct rpc_task *task;
ab7cb0df 7349 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7350
ab7cb0df 7351 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7352 nfs4_free_lock_state(server, lsp);
7353 if (IS_ERR(task))
7354 return PTR_ERR(task);
7355 rpc_put_task(task);
7356 return 0;
7357}
7358
36281caa
TM		 7359static bool nfs41_match_stateid(const nfs4_stateid *s1,
7360 const nfs4_stateid *s2)
7361{
2d2f24ad 7362 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7363 return false;
7364
2d2f24ad 7365 if (s1->seqid == s2->seqid)
36281caa 7366 return true;
2d2f24ad 7367 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7368 return true;
7369
7370 return false;
7371}
7372
557134a3
AA		 7373#endif /* CONFIG_NFS_V4_1 */
7374
36281caa
TM		 7375static bool nfs4_match_stateid(const nfs4_stateid *s1,
7376 const nfs4_stateid *s2)
7377{
f597c537 7378 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7379}
7380
7381
17280175 7382static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7383 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7384 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7385 .recover_open = nfs4_open_reclaim,
7386 .recover_lock = nfs4_lock_reclaim,
591d71cb 7387 .establish_clid = nfs4_init_clientid,
05f4c350 7388 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7389};
7390
591d71cb 7391#if defined(CONFIG_NFS_V4_1)
17280175 7392static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7393 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7394 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7395 .recover_open = nfs4_open_reclaim,
7396 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7397 .establish_clid = nfs41_init_clientid,
fce5c838 7398 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7399 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7400};
7401#endif /* CONFIG_NFS_V4_1 */
7402
17280175 7403static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7404 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7405 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7406 .recover_open = nfs4_open_expired,
7407 .recover_lock = nfs4_lock_expired,
7408 .establish_clid = nfs4_init_clientid,
7409};
7410
7411#if defined(CONFIG_NFS_V4_1)
17280175 7412static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7413 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7414 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7415 .recover_open = nfs41_open_expired,
7416 .recover_lock = nfs41_lock_expired,
4d643d1d 7417 .establish_clid = nfs41_init_clientid,
1da177e4 7418};
591d71cb 7419#endif /* CONFIG_NFS_V4_1 */
1da177e4 7420
17280175 7421static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7422 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7423 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7424 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7425};
7426
7427#if defined(CONFIG_NFS_V4_1)
17280175 7428static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7429 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7430 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7431 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7432};
7433#endif
7434
97dc1359
TM		 7435static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7436 .minor_version = 0,
39c6daae
TM		 7437 .init_caps = NFS_CAP_READDIRPLUS
7438 | NFS_CAP_ATOMIC_OPEN
7439 | NFS_CAP_CHANGE_ATTR
7440 | NFS_CAP_POSIX_LOCK,
97dc1359 7441 .call_sync = _nfs4_call_sync,
36281caa 7442 .match_stateid = nfs4_match_stateid,
fca78d6d 7443 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7444 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7445 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7446 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7447 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7448};
7449
7450#if defined(CONFIG_NFS_V4_1)
7451static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7452 .minor_version = 1,
39c6daae
TM		 7453 .init_caps = NFS_CAP_READDIRPLUS
7454 | NFS_CAP_ATOMIC_OPEN
7455 | NFS_CAP_CHANGE_ATTR
3b66486c 7456 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7457 | NFS_CAP_STATEID_NFSV41
7458 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7459 .call_sync = nfs4_call_sync_sequence,
36281caa 7460 .match_stateid = nfs41_match_stateid,
fca78d6d 7461 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7462 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7463 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7464 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7465 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7466};
7467#endif
7468
42c2c424
SD		 7469#if defined(CONFIG_NFS_V4_2)
7470static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7471 .minor_version = 2,
7017310a
BS		 7472 .init_caps = NFS_CAP_READDIRPLUS
7473 | NFS_CAP_ATOMIC_OPEN
7474 | NFS_CAP_CHANGE_ATTR
7475 | NFS_CAP_POSIX_LOCK
7476 | NFS_CAP_STATEID_NFSV41
7477 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7478 .call_sync = nfs4_call_sync_sequence,
7479 .match_stateid = nfs41_match_stateid,
7480 .find_root_sec = nfs41_find_root_sec,
7017310a 7481 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7482 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7483 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7484 .state_renewal_ops = &nfs41_state_renewal_ops,
7485};
7486#endif
7487
97dc1359
TM		 7488const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7489 [0] = &nfs_v4_0_minor_ops,
7490#if defined(CONFIG_NFS_V4_1)
7491 [1] = &nfs_v4_1_minor_ops,
7492#endif
42c2c424
SD		 7493#if defined(CONFIG_NFS_V4_2)
7494 [2] = &nfs_v4_2_minor_ops,
7495#endif
97dc1359
TM		 7496};
7497
17f26b12 7498static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7499 .create = nfs_create,
7500 .lookup = nfs_lookup,
7501 .atomic_open = nfs_atomic_open,
7502 .link = nfs_link,
7503 .unlink = nfs_unlink,
7504 .symlink = nfs_symlink,
7505 .mkdir = nfs_mkdir,
7506 .rmdir = nfs_rmdir,
7507 .mknod = nfs_mknod,
7508 .rename = nfs_rename,
7509 .permission = nfs_permission,
7510 .getattr = nfs_getattr,
7511 .setattr = nfs_setattr,
7512 .getxattr = generic_getxattr,
7513 .setxattr = generic_setxattr,
7514 .listxattr = generic_listxattr,
7515 .removexattr = generic_removexattr,
7516};
7517
92e1d5be 7518static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7519 .permission = nfs_permission,
7520 .getattr = nfs_getattr,
7521 .setattr = nfs_setattr,
64c2ce8b
AK		 7522 .getxattr = generic_getxattr,
7523 .setxattr = generic_setxattr,
7524 .listxattr = generic_listxattr,
7525 .removexattr = generic_removexattr,
6b3b5496
BF		 7526};
7527
509de811 7528const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7529 .version = 4, /* protocol version */
7530 .dentry_ops = &nfs4_dentry_operations,
7531 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7532 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7533 .file_ops = &nfs4_file_operations,
1da177e4 7534 .getroot = nfs4_proc_get_root,
281cad46 7535 .submount = nfs4_submount,
ff9099f2 7536 .try_mount = nfs4_try_mount,
1da177e4
LT		 7537 .getattr = nfs4_proc_getattr,
7538 .setattr = nfs4_proc_setattr,
7539 .lookup = nfs4_proc_lookup,
7540 .access = nfs4_proc_access,
7541 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7542 .create = nfs4_proc_create,
7543 .remove = nfs4_proc_remove,
7544 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7545 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7546 .unlink_done = nfs4_proc_unlink_done,
7547 .rename = nfs4_proc_rename,
d3d4152a 7548 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7549 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7550 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7551 .link = nfs4_proc_link,
7552 .symlink = nfs4_proc_symlink,
7553 .mkdir = nfs4_proc_mkdir,
7554 .rmdir = nfs4_proc_remove,
7555 .readdir = nfs4_proc_readdir,
7556 .mknod = nfs4_proc_mknod,
7557 .statfs = nfs4_proc_statfs,
7558 .fsinfo = nfs4_proc_fsinfo,
7559 .pathconf = nfs4_proc_pathconf,
e9326dca 7560 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7561 .decode_dirent = nfs4_decode_dirent,
7562 .read_setup = nfs4_proc_read_setup,
1abb5088 7563 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7564 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7565 .read_done = nfs4_read_done,
1da177e4 7566 .write_setup = nfs4_proc_write_setup,
57208fa7 7567 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7568 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7569 .write_done = nfs4_write_done,
1da177e4 7570 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7571 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7572 .commit_done = nfs4_commit_done,
1da177e4 7573 .lock = nfs4_proc_lock,
e50a1c2e 7574 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7575 .close_context = nfs4_close_context,
2b484297 7576 .open_context = nfs4_atomic_open,
011e2a7f 7577 .have_delegation = nfs4_have_delegation,
57ec14c5 7578 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7579 .alloc_client = nfs4_alloc_client,
45a52a02 7580 .init_client = nfs4_init_client,
cdb7eced 7581 .free_client = nfs4_free_client,
1179acc6
BS		 7582 .create_server = nfs4_create_server,
7583 .clone_server = nfs_clone_server,
1da177e4
LT		 7584};
7585
64c2ce8b
AK		 7586static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7587 .prefix = XATTR_NAME_NFSV4_ACL,
7588 .list = nfs4_xattr_list_nfs4_acl,
7589 .get = nfs4_xattr_get_nfs4_acl,
7590 .set = nfs4_xattr_set_nfs4_acl,
7591};
7592
7593const struct xattr_handler *nfs4_xattr_handlers[] = {
7594 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7595#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7596 &nfs4_xattr_nfs4_label_handler,
7597#endif
64c2ce8b
AK		 7598 NULL
7599};
7600
1da177e4
LT		 7601/*
7602 * Local variables:
7603 * c-basic-offset: 8
7604 * End:
7605 */
Linux 6.x block layer and io_uring tree(s)