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NFSv4: Add tracepoints for debugging inode manipulations
[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);
42113a75 1445 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1446 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1447 continue;
168667c4 1448 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1449 break;
1450 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1451 } while (exception.retry);
1452 return err;
1453}
1454
864472e9
TM		 1455static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1456{
1457 struct nfs_open_context *ctx;
1458 int ret;
1459
1460 ctx = nfs4_state_find_open_context(state);
1461 if (IS_ERR(ctx))
91876b13 1462 return -EAGAIN;
539cd03a 1463 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1464 put_nfs_open_context(ctx);
1465 return ret;
1466}
1467
db4f2e63 1468static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1469{
be76b5b6
TM		 1470 switch (err) {
1471 default:
1472 printk(KERN_ERR "NFS: %s: unhandled error "
1473 "%d.\n", __func__, err);
1474 case 0:
1475 case -ENOENT:
1476 case -ESTALE:
1477 break;
1478 case -NFS4ERR_BADSESSION:
1479 case -NFS4ERR_BADSLOT:
1480 case -NFS4ERR_BAD_HIGH_SLOT:
1481 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1482 case -NFS4ERR_DEADSESSION:
1483 set_bit(NFS_DELEGATED_STATE, &state->flags);
1484 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1485 return -EAGAIN;
1486 case -NFS4ERR_STALE_CLIENTID:
1487 case -NFS4ERR_STALE_STATEID:
1488 set_bit(NFS_DELEGATED_STATE, &state->flags);
1489 case -NFS4ERR_EXPIRED:
1490 /* Don't recall a delegation if it was lost */
1491 nfs4_schedule_lease_recovery(server->nfs_client);
1492 return -EAGAIN;
1493 case -NFS4ERR_DELEG_REVOKED:
1494 case -NFS4ERR_ADMIN_REVOKED:
1495 case -NFS4ERR_BAD_STATEID:
db4f2e63 1496 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1497 nfs_inode_find_state_and_recover(state->inode,
1498 stateid);
1499 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1500 return 0;
1501 case -NFS4ERR_DELAY:
1502 case -NFS4ERR_GRACE:
1503 set_bit(NFS_DELEGATED_STATE, &state->flags);
1504 ssleep(1);
1505 return -EAGAIN;
db4f2e63
TM		 1506 case -ENOMEM:
1507 case -NFS4ERR_DENIED:
1508 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1509 return 0;
be76b5b6 1510 }
1da177e4
LT		 1511 return err;
1512}
1513
db4f2e63
TM		 1514int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1515{
1516 struct nfs_server *server = NFS_SERVER(state->inode);
1517 struct nfs4_opendata *opendata;
1518 int err;
1519
1520 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1521 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522 if (IS_ERR(opendata))
1523 return PTR_ERR(opendata);
1524 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1525 err = nfs4_open_recover(opendata, state);
1526 nfs4_opendata_put(opendata);
1527 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1528}
1529
cdd4e68b
TM		 1530static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1531{
1532 struct nfs4_opendata *data = calldata;
1533
1534 data->rpc_status = task->tk_status;
26e976a8 1535 if (data->rpc_status == 0) {
f597c537 1536 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1537 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1538 renew_lease(data->o_res.server, data->timestamp);
3e309914 1539 data->rpc_done = 1;
26e976a8 1540 }
cdd4e68b
TM		 1541}
1542
1543static void nfs4_open_confirm_release(void *calldata)
1544{
1545 struct nfs4_opendata *data = calldata;
1546 struct nfs4_state *state = NULL;
1547
1548 /* If this request hasn't been cancelled, do nothing */
1549 if (data->cancelled == 0)
1550 goto out_free;
1551 /* In case of error, no cleanup! */
3e309914 1552 if (!data->rpc_done)
cdd4e68b 1553 goto out_free;
cdd4e68b 1554 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1555 if (!IS_ERR(state))
643168c2 1556 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1557out_free:
c6d00e63 1558 nfs4_opendata_put(data);
cdd4e68b
TM		 1559}
1560
1561static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1562 .rpc_call_done = nfs4_open_confirm_done,
1563 .rpc_release = nfs4_open_confirm_release,
1564};
1565
1566/*
1567 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1568 */
1569static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1570{
1571 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1572 struct rpc_task *task;
5138fde0
TM		 1573 struct rpc_message msg = {
1574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1575 .rpc_argp = &data->c_arg,
1576 .rpc_resp = &data->c_res,
1577 .rpc_cred = data->owner->so_cred,
1578 };
c970aa85
TM		 1579 struct rpc_task_setup task_setup_data = {
1580 .rpc_client = server->client,
5138fde0 1581 .rpc_message = &msg,
c970aa85
TM		 1582 .callback_ops = &nfs4_open_confirm_ops,
1583 .callback_data = data,
101070ca 1584 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1585 .flags = RPC_TASK_ASYNC,
1586 };
1da177e4
LT		 1587 int status;
1588
c6d00e63 1589 kref_get(&data->kref);
3e309914
TM		 1590 data->rpc_done = 0;
1591 data->rpc_status = 0;
5138fde0 1592 data->timestamp = jiffies;
c970aa85 1593 task = rpc_run_task(&task_setup_data);
7a1218a2 1594 if (IS_ERR(task))
cdd4e68b 1595 return PTR_ERR(task);
cdd4e68b
TM		 1596 status = nfs4_wait_for_completion_rpc_task(task);
1597 if (status != 0) {
1598 data->cancelled = 1;
1599 smp_wmb();
1600 } else
1601 status = data->rpc_status;
e6b3c4db 1602 rpc_put_task(task);
1da177e4
LT		 1603 return status;
1604}
1605
24ac23ab 1606static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1607{
24ac23ab
TM		 1608 struct nfs4_opendata *data = calldata;
1609 struct nfs4_state_owner *sp = data->owner;
549b19cc 1610 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1611
24ac23ab 1612 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1613 goto out_wait;
aac00a8d
TM		 1614 /*
1615 * Check if we still need to send an OPEN call, or if we can use
1616 * a delegation instead.
1617 */
1618 if (data->state != NULL) {
1619 struct nfs_delegation *delegation;
1620
dc0b027d 1621 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1622 goto out_no_action;
aac00a8d
TM		 1623 rcu_read_lock();
1624 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1625 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1626 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1627 can_open_delegated(delegation, data->o_arg.fmode))
1628 goto unlock_no_action;
aac00a8d
TM		 1629 rcu_read_unlock();
1630 }
95b72eb0 1631 /* Update client id. */
549b19cc 1632 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1633 switch (data->o_arg.claim) {
1634 case NFS4_OPEN_CLAIM_PREVIOUS:
1635 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1636 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1637 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1638 case NFS4_OPEN_CLAIM_FH:
1639 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1640 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1641 }
26e976a8 1642 data->timestamp = jiffies;
035168ab 1643 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1644 &data->o_arg.seq_args,
2240a9e2
TM		 1645 &data->o_res.seq_res,
1646 task) != 0)
1647 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1648
1649 /* Set the create mode (note dependency on the session type) */
1650 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1651 if (data->o_arg.open_flags & O_EXCL) {
1652 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1653 if (nfs4_has_persistent_session(clp))
1654 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1655 else if (clp->cl_mvops->minor_version > 0)
1656 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1657 }
6ee41268 1658 return;
652f89f6
TM		 1659unlock_no_action:
1660 rcu_read_unlock();
6ee41268
TM		 1661out_no_action:
1662 task->tk_action = NULL;
c8da19b9 1663out_wait:
b75ad4cd 1664 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1665}
1666
24ac23ab
TM		 1667static void nfs4_open_done(struct rpc_task *task, void *calldata)
1668{
1669 struct nfs4_opendata *data = calldata;
1da177e4 1670
24ac23ab 1671 data->rpc_status = task->tk_status;
d898528c 1672
14516c3a
TM		 1673 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1674 return;
d898528c 1675
24ac23ab 1676 if (task->tk_status == 0) {
807d66d8
TM		 1677 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1678 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1679 case S_IFREG:
1680 break;
1681 case S_IFLNK:
24ac23ab 1682 data->rpc_status = -ELOOP;
6f926b5b
TM		 1683 break;
1684 case S_IFDIR:
24ac23ab 1685 data->rpc_status = -EISDIR;
6f926b5b
TM		 1686 break;
1687 default:
24ac23ab 1688 data->rpc_status = -ENOTDIR;
807d66d8 1689 }
6f926b5b 1690 }
26e976a8 1691 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1692 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1693 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1694 }
3e309914 1695 data->rpc_done = 1;
24ac23ab 1696}
6f926b5b 1697
24ac23ab
TM		 1698static void nfs4_open_release(void *calldata)
1699{
1700 struct nfs4_opendata *data = calldata;
1701 struct nfs4_state *state = NULL;
1702
1703 /* If this request hasn't been cancelled, do nothing */
1704 if (data->cancelled == 0)
1705 goto out_free;
1706 /* In case of error, no cleanup! */
3e309914 1707 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1708 goto out_free;
1709 /* In case we need an open_confirm, no cleanup! */
1710 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1711 goto out_free;
24ac23ab 1712 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1713 if (!IS_ERR(state))
643168c2 1714 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1715out_free:
c6d00e63 1716 nfs4_opendata_put(data);
24ac23ab
TM		 1717}
1718
1719static const struct rpc_call_ops nfs4_open_ops = {
1720 .rpc_call_prepare = nfs4_open_prepare,
1721 .rpc_call_done = nfs4_open_done,
1722 .rpc_release = nfs4_open_release,
1723};
1724
b257957e 1725static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1726{
1727 struct inode *dir = data->dir->d_inode;
1728 struct nfs_server *server = NFS_SERVER(dir);
1729 struct nfs_openargs *o_arg = &data->o_arg;
1730 struct nfs_openres *o_res = &data->o_res;
1731 struct rpc_task *task;
5138fde0
TM		 1732 struct rpc_message msg = {
1733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1734 .rpc_argp = o_arg,
1735 .rpc_resp = o_res,
1736 .rpc_cred = data->owner->so_cred,
1737 };
c970aa85
TM		 1738 struct rpc_task_setup task_setup_data = {
1739 .rpc_client = server->client,
5138fde0 1740 .rpc_message = &msg,
c970aa85
TM		 1741 .callback_ops = &nfs4_open_ops,
1742 .callback_data = data,
101070ca 1743 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1744 .flags = RPC_TASK_ASYNC,
1745 };
24ac23ab
TM		 1746 int status;
1747
9d12b216 1748 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1749 kref_get(&data->kref);
3e309914
TM		 1750 data->rpc_done = 0;
1751 data->rpc_status = 0;
2ced46c2 1752 data->cancelled = 0;
bdeca1b7
TM		 1753 data->is_recover = 0;
1754 if (isrecover) {
8fe72bac 1755 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1756 data->is_recover = 1;
1757 }
c970aa85 1758 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1759 if (IS_ERR(task))
1760 return PTR_ERR(task);
1761 status = nfs4_wait_for_completion_rpc_task(task);
1762 if (status != 0) {
1763 data->cancelled = 1;
1764 smp_wmb();
1765 } else
1766 status = data->rpc_status;
1767 rpc_put_task(task);
1768
1769 return status;
1770}
1771
1772static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1773{
1774 struct inode *dir = data->dir->d_inode;
1775 struct nfs_openres *o_res = &data->o_res;
1776 int status;
1777
1778 status = nfs4_run_open_task(data, 1);
1779 if (status != 0 || !data->rpc_done)
1780 return status;
1781
6926afd1
TM		 1782 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1783
b257957e
AB		 1784 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1785 status = _nfs4_proc_open_confirm(data);
1786 if (status != 0)
1787 return status;
1788 }
1789
1790 return status;
1791}
1792
6168f62c
WAA		 1793static int nfs4_opendata_access(struct rpc_cred *cred,
1794 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1795 struct nfs4_state *state, fmode_t fmode,
1796 int openflags)
6168f62c
WAA		 1797{
1798 struct nfs_access_entry cache;
1799 u32 mask;
1800
1801 /* access call failed or for some reason the server doesn't
1802 * support any access modes -- defer access call until later */
1803 if (opendata->o_res.access_supported == 0)
1804 return 0;
1805
1806 mask = 0;
bbd3a8ee 1807 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1808 * write mode bits, but POSIX allows the creating process to write.
1809 * use openflags to check for exec, because fmode won't
1810 * always have FMODE_EXEC set when file open for exec. */
1811 if (openflags & __FMODE_EXEC) {
1812 /* ONLY check for exec rights */
1813 mask = MAY_EXEC;
1814 } else if (fmode & FMODE_READ)
1815 mask = MAY_READ;
6168f62c
WAA		 1816
1817 cache.cred = cred;
1818 cache.jiffies = jiffies;
1819 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1820 nfs_access_add_cache(state->inode, &cache);
1821
bbd3a8ee 1822 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1823 return 0;
1824
1825 /* even though OPEN succeeded, access is denied. Close the file */
1826 nfs4_close_state(state, fmode);
998f40b5 1827 return -EACCES;
6168f62c
WAA		 1828}
1829
b257957e
AB		 1830/*
1831 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1832 */
1833static int _nfs4_proc_open(struct nfs4_opendata *data)
1834{
1835 struct inode *dir = data->dir->d_inode;
1836 struct nfs_server *server = NFS_SERVER(dir);
1837 struct nfs_openargs *o_arg = &data->o_arg;
1838 struct nfs_openres *o_res = &data->o_res;
1839 int status;
1840
1841 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1842 if (!data->rpc_done)
1843 return status;
1844 if (status != 0) {
1845 if (status == -NFS4ERR_BADNAME &&
1846 !(o_arg->open_flags & O_CREAT))
1847 return -ENOENT;
24ac23ab 1848 return status;
08ef7bd3 1849 }
24ac23ab 1850
6926afd1
TM		 1851 nfs_fattr_map_and_free_names(server, &data->f_attr);
1852
90ff0c54 1853 if (o_arg->open_flags & O_CREAT)
56ae19f3 1854 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1855 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1856 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1857 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1858 status = _nfs4_proc_open_confirm(data);
1da177e4 1859 if (status != 0)
24ac23ab 1860 return status;
1da177e4
LT		 1861 }
1862 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1863 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1864 return 0;
1da177e4
LT		 1865}
1866
d83217c1
AA		 1867static int nfs4_recover_expired_lease(struct nfs_server *server)
1868{
1869 return nfs4_client_recover_expired_lease(server->nfs_client);
1870}
1871
1da177e4
LT		 1872/*
1873 * OPEN_EXPIRED:
1874 * reclaim state on the server after a network partition.
1875 * Assumes caller holds the appropriate lock
1876 */
539cd03a 1877static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1878{
e56e0b78 1879 struct nfs4_opendata *opendata;
864472e9 1880 int ret;
1da177e4 1881
4a1c0893 1882 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1883 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1884 if (IS_ERR(opendata))
1885 return PTR_ERR(opendata);
864472e9 1886 ret = nfs4_open_recover(opendata, state);
35d05778 1887 if (ret == -ESTALE)
3d4ff43d 1888 d_drop(ctx->dentry);
c6d00e63 1889 nfs4_opendata_put(opendata);
864472e9 1890 return ret;
1da177e4
LT		 1891}
1892
a9ed2e25 1893static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1894{
539cd03a 1895 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1896 struct nfs4_exception exception = { };
1897 int err;
1898
1899 do {
539cd03a 1900 err = _nfs4_open_expired(ctx, state);
42113a75 1901 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1902 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1903 continue;
a9ed2e25
TM		 1904 switch (err) {
1905 default:
1906 goto out;
1907 case -NFS4ERR_GRACE:
1908 case -NFS4ERR_DELAY:
1909 nfs4_handle_exception(server, err, &exception);
1910 err = 0;
1911 }
202b50dc 1912 } while (exception.retry);
a9ed2e25 1913out:
202b50dc
TM		 1914 return err;
1915}
1916
1da177e4
LT		 1917static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1918{
1da177e4 1919 struct nfs_open_context *ctx;
864472e9 1920 int ret;
1da177e4 1921
864472e9
TM		 1922 ctx = nfs4_state_find_open_context(state);
1923 if (IS_ERR(ctx))
91876b13 1924 return -EAGAIN;
539cd03a 1925 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1926 put_nfs_open_context(ctx);
1927 return ret;
1da177e4
LT		 1928}
1929
f062eb6c 1930#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1931static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1932{
f062eb6c 1933 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1934 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1935 struct nfs_delegation *delegation;
1936 struct rpc_cred *cred = NULL;
1937 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1938
1939 /* If a state reset has been done, test_stateid is unneeded */
1940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1941 return;
1942
ab7cb0df
TM		 1943 /* Get the delegation credential for use by test/free_stateid */
1944 rcu_read_lock();
1945 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1946 if (delegation != NULL &&
1947 nfs4_stateid_match(&delegation->stateid, stateid)) {
1948 cred = get_rpccred(delegation->cred);
1949 rcu_read_unlock();
1950 status = nfs41_test_stateid(server, stateid, cred);
1951 } else
1952 rcu_read_unlock();
1953
3e60ffdd
CL		 1954 if (status != NFS_OK) {
1955 /* Free the stateid unless the server explicitly
1956 * informs us the stateid is unrecognized. */
1957 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1958 nfs41_free_stateid(server, stateid, cred);
6938867e 1959 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1960
6938867e
BS		 1961 write_seqlock(&state->seqlock);
1962 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1963 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1964 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1965 }
ab7cb0df
TM		 1966
1967 if (cred != NULL)
1968 put_rpccred(cred);
3e60ffdd
CL		 1969}
1970
1971/**
1972 * nfs41_check_open_stateid - possibly free an open stateid
1973 *
1974 * @state: NFSv4 state for an inode
1975 *
1976 * Returns NFS_OK if recovery for this stateid is now finished.
1977 * Otherwise a negative NFS4ERR value is returned.
1978 */
1979static int nfs41_check_open_stateid(struct nfs4_state *state)
1980{
1981 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1982 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1983 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1984 int status;
1985
1986 /* If a state reset has been done, test_stateid is unneeded */
1987 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1988 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1989 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1990 return -NFS4ERR_BAD_STATEID;
1991
ab7cb0df 1992 status = nfs41_test_stateid(server, stateid, cred);
3e60ffdd
CL		 1993 if (status != NFS_OK) {
1994 /* Free the stateid unless the server explicitly
1995 * informs us the stateid is unrecognized. */
1996 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1997 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 1998
1999 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2000 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2001 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2002 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2003 }
2004 return status;
2005}
2006
2007static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2008{
eb64cf96 2009 int status;
b01dd1d8 2010
3e60ffdd
CL		 2011 nfs41_clear_delegation_stateid(state);
2012 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2013 if (status != NFS_OK)
2014 status = nfs4_open_expired(sp, state);
2015 return status;
f062eb6c
BS		 2016}
2017#endif
2018
aa53ed54
JL		 2019/*
2020 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2021 * fields corresponding to attributes that were used to store the verifier.
2022 * Make sure we clobber those fields in the later setattr call
2023 */
2024static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2025{
2026 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2027 !(sattr->ia_valid & ATTR_ATIME_SET))
2028 sattr->ia_valid |= ATTR_ATIME;
2029
2030 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2031 !(sattr->ia_valid & ATTR_MTIME_SET))
2032 sattr->ia_valid |= ATTR_MTIME;
2033}
2034
c21443c2
TM		 2035static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2036 fmode_t fmode,
2037 int flags,
3efb9722 2038 struct nfs_open_context *ctx)
c21443c2
TM		 2039{
2040 struct nfs4_state_owner *sp = opendata->owner;
2041 struct nfs_server *server = sp->so_server;
275bb307 2042 struct dentry *dentry;
c21443c2
TM		 2043 struct nfs4_state *state;
2044 unsigned int seq;
2045 int ret;
2046
2047 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2048
2049 ret = _nfs4_proc_open(opendata);
2050 if (ret != 0)
2051 goto out;
2052
2053 state = nfs4_opendata_to_nfs4_state(opendata);
2054 ret = PTR_ERR(state);
2055 if (IS_ERR(state))
2056 goto out;
2057 if (server->caps & NFS_CAP_POSIX_LOCK)
2058 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2059
275bb307
TM		 2060 dentry = opendata->dentry;
2061 if (dentry->d_inode == NULL) {
2062 /* FIXME: Is this d_drop() ever needed? */
2063 d_drop(dentry);
2064 dentry = d_add_unique(dentry, igrab(state->inode));
2065 if (dentry == NULL) {
2066 dentry = opendata->dentry;
2067 } else if (dentry != ctx->dentry) {
2068 dput(ctx->dentry);
2069 ctx->dentry = dget(dentry);
2070 }
2071 nfs_set_verifier(dentry,
2072 nfs_save_change_attribute(opendata->dir->d_inode));
2073 }
2074
c21443c2
TM		 2075 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2076 if (ret != 0)
2077 goto out;
2078
3efb9722 2079 ctx->state = state;
c45ffdd2
TM		 2080 if (dentry->d_inode == state->inode) {
2081 nfs_inode_attach_open_context(ctx);
2082 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2083 nfs4_schedule_stateid_recovery(server, state);
2084 }
c21443c2
TM		 2085out:
2086 return ret;
2087}
2088
1da177e4 2089/*
24ac23ab 2090 * Returns a referenced nfs4_state
1da177e4 2091 */
82be417a 2092static int _nfs4_do_open(struct inode *dir,
4197a055 2093 struct nfs_open_context *ctx,
82be417a
AA		 2094 int flags,
2095 struct iattr *sattr,
959d921f 2096 struct nfs4_label *label)
1da177e4
LT		 2097{
2098 struct nfs4_state_owner *sp;
2099 struct nfs4_state *state = NULL;
2100 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2101 struct nfs4_opendata *opendata;
4197a055
TM		 2102 struct dentry *dentry = ctx->dentry;
2103 struct rpc_cred *cred = ctx->cred;
2104 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2105 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2106 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2107 struct nfs4_label *olabel = NULL;
aac00a8d 2108 int status;
1da177e4
LT		 2109
2110 /* Protect against reboot recovery conflicts */
1da177e4 2111 status = -ENOMEM;
d1e284d5
TM		 2112 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2113 if (sp == NULL) {
1da177e4
LT		 2114 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2115 goto out_err;
2116 }
58d9714a
TM		 2117 status = nfs4_recover_expired_lease(server);
2118 if (status != 0)
b4454fe1 2119 goto err_put_state_owner;
82a2c1b7
AV		 2120 if (dentry->d_inode != NULL)
2121 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2122 status = -ENOMEM;
49f9a0fa
TM		 2123 if (dentry->d_inode)
2124 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2125 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2126 label, claim, GFP_KERNEL);
e56e0b78 2127 if (opendata == NULL)
95d35cb4 2128 goto err_put_state_owner;
1da177e4 2129
14c43f76
DQ		 2130 if (label) {
2131 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2132 if (IS_ERR(olabel)) {
2133 status = PTR_ERR(olabel);
2134 goto err_opendata_put;
2135 }
2136 }
2137
82be417a
AA		 2138 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2139 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2140 if (!opendata->f_attr.mdsthreshold)
14c43f76 2141 goto err_free_label;
1549210f 2142 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2143 }
82a2c1b7
AV		 2144 if (dentry->d_inode != NULL)
2145 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2146
3efb9722 2147 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2148 if (status != 0)
14c43f76 2149 goto err_free_label;
3efb9722 2150 state = ctx->state;
6168f62c 2151
549b19cc
TM		 2152 if ((opendata->o_arg.open_flags & O_EXCL) &&
2153 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2154 nfs4_exclusive_attrset(opendata, sattr);
2155
2156 nfs_fattr_init(opendata->o_res.f_attr);
2157 status = nfs4_do_setattr(state->inode, cred,
2158 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2159 state, label, olabel);
2160 if (status == 0) {
0ab64e0e 2161 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2162 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2163 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2164 }
0ab64e0e 2165 }
82be417a
AA		 2166
2167 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2168 *ctx_th = opendata->f_attr.mdsthreshold;
2169 else
2170 kfree(opendata->f_attr.mdsthreshold);
2171 opendata->f_attr.mdsthreshold = NULL;
2172
14c43f76
DQ		 2173 nfs4_label_free(olabel);
2174
c6d00e63 2175 nfs4_opendata_put(opendata);
1da177e4 2176 nfs4_put_state_owner(sp);
1da177e4 2177 return 0;
14c43f76
DQ		 2178err_free_label:
2179 nfs4_label_free(olabel);
c6d00e63 2180err_opendata_put:
82be417a 2181 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2182 nfs4_opendata_put(opendata);
e56e0b78
TM		 2183err_put_state_owner:
2184 nfs4_put_state_owner(sp);
1da177e4 2185out_err:
1da177e4
LT		 2186 return status;
2187}
2188
2189
82be417a 2190static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2191 struct nfs_open_context *ctx,
82be417a
AA		 2192 int flags,
2193 struct iattr *sattr,
959d921f 2194 struct nfs4_label *label)
1da177e4 2195{
49f9a0fa 2196 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2197 struct nfs4_exception exception = { };
2198 struct nfs4_state *res;
2199 int status;
2200
2201 do {
959d921f 2202 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2203 res = ctx->state;
42113a75 2204 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2205 if (status == 0)
2206 break;
2207 /* NOTE: BAD_SEQID means the server and client disagree about the
2208 * book-keeping w.r.t. state-changing operations
2209 * (OPEN/CLOSE/LOCK/LOCKU...)
2210 * It is actually a sign of a bug on the client or on the server.
2211 *
2212 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2213 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2214 * have unhashed the old state_owner for us, and that we can
2215 * therefore safely retry using a new one. We should still warn
2216 * the user though...
2217 */
2218 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2219 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2220 " returned a bad sequence-id error!\n",
2221 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2222 exception.retry = 1;
2223 continue;
2224 }
550f5747
TM		 2225 /*
2226 * BAD_STATEID on OPEN means that the server cancelled our
2227 * state before it received the OPEN_CONFIRM.
2228 * Recover by retrying the request as per the discussion
2229 * on Page 181 of RFC3530.
2230 */
2231 if (status == -NFS4ERR_BAD_STATEID) {
2232 exception.retry = 1;
2233 continue;
2234 }
aac00a8d
TM		 2235 if (status == -EAGAIN) {
2236 /* We must have found a delegation */
2237 exception.retry = 1;
2238 continue;
2239 }
49f9a0fa
TM		 2240 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2241 continue;
2242 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2243 status, &exception));
2244 } while (exception.retry);
2245 return res;
2246}
2247
659bfcd6
TM		 2248static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2249 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2250 struct nfs4_state *state, struct nfs4_label *ilabel,
2251 struct nfs4_label *olabel)
1da177e4 2252{
3e4f6290 2253 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2254 struct nfs_setattrargs arg = {
3e4f6290 2255 .fh = NFS_FH(inode),
1da177e4
LT		 2256 .iap = sattr,
2257 .server = server,
2258 .bitmask = server->attr_bitmask,
1775fd3e 2259 .label = ilabel,
1da177e4
LT		 2260 };
2261 struct nfs_setattrres res = {
2262 .fattr = fattr,
1775fd3e 2263 .label = olabel,
1da177e4
LT		 2264 .server = server,
2265 };
2266 struct rpc_message msg = {
659bfcd6
TM		 2267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2268 .rpc_argp = &arg,
2269 .rpc_resp = &res,
2270 .rpc_cred = cred,
1da177e4 2271 };
26e976a8 2272 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2273 fmode_t fmode;
2274 bool truncate;
65e4308d 2275 int status;
1da177e4 2276
aa9c2669
DQ		 2277 arg.bitmask = nfs4_bitmask(server, ilabel);
2278 if (ilabel)
2279 arg.bitmask = nfs4_bitmask(server, olabel);
2280
0e574af1 2281 nfs_fattr_init(fattr);
1da177e4 2282
ee3ae84e
TM		 2283 /* Servers should only apply open mode checks for file size changes */
2284 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2285 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2286
2287 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2288 /* Use that stateid */
2289 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2290 struct nfs_lockowner lockowner = {
2291 .l_owner = current->files,
2292 .l_pid = current->tgid,
2293 };
4fc8796d 2294 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2295 &lockowner);
08e9eac4 2296 } else
f597c537 2297 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2298
7c513058 2299 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2300 if (status == 0 && state != NULL)
2301 renew_lease(server, timestamp);
65e4308d 2302 return status;
1da177e4
LT		 2303}
2304
659bfcd6
TM		 2305static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2306 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2307 struct nfs4_state *state, struct nfs4_label *ilabel,
2308 struct nfs4_label *olabel)
1da177e4 2309{
3e4f6290 2310 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2311 struct nfs4_exception exception = {
2312 .state = state,
3114ea7a 2313 .inode = inode,
a1d0b5ee 2314 };
1da177e4
LT		 2315 int err;
2316 do {
1775fd3e 2317 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2318 trace_nfs4_setattr(inode, err);
451146be
TM		 2319 switch (err) {
2320 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2321 if (!(sattr->ia_valid & ATTR_SIZE)) {
2322 pr_warn_once("NFSv4: server %s is incorrectly "
2323 "applying open mode checks to "
2324 "a SETATTR that is not "
2325 "changing file size.\n",
2326 server->nfs_client->cl_hostname);
2327 }
451146be
TM		 2328 if (state && !(state->state & FMODE_WRITE)) {
2329 err = -EBADF;
2330 if (sattr->ia_valid & ATTR_OPEN)
2331 err = -EACCES;
2332 goto out;
2333 }
2334 }
2335 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2336 } while (exception.retry);
451146be 2337out:
1da177e4
LT		 2338 return err;
2339}
2340
2341struct nfs4_closedata {
2342 struct inode *inode;
2343 struct nfs4_state *state;
2344 struct nfs_closeargs arg;
2345 struct nfs_closeres res;
516a6af6 2346 struct nfs_fattr fattr;
26e976a8 2347 unsigned long timestamp;
f7e8917a
FI		 2348 bool roc;
2349 u32 roc_barrier;
1da177e4
LT		 2350};
2351
963d8fe5 2352static void nfs4_free_closedata(void *data)
9512135d 2353{
963d8fe5
TM		 2354 struct nfs4_closedata *calldata = data;
2355 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2356 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2357
f7e8917a
FI		 2358 if (calldata->roc)
2359 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2360 nfs4_put_open_state(calldata->state);
2361 nfs_free_seqid(calldata->arg.seqid);
9512135d 2362 nfs4_put_state_owner(sp);
322b2b90 2363 nfs_sb_deactive(sb);
9512135d
TM		 2364 kfree(calldata);
2365}
2366
88069f77
TM		 2367static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2368 fmode_t fmode)
2369{
2370 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2371 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2372 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2373 case FMODE_WRITE:
88069f77 2374 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2375 break;
2376 case FMODE_READ:
88069f77 2377 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2378 break;
2379 case 0:
2380 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2381 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2382 clear_bit(NFS_OPEN_STATE, &state->flags);
2383 }
88069f77
TM		 2384 spin_unlock(&state->owner->so_lock);
2385}
2386
963d8fe5 2387static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2388{
963d8fe5 2389 struct nfs4_closedata *calldata = data;
1da177e4 2390 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2391 struct nfs_server *server = NFS_SERVER(calldata->inode);
2392
a3ca5651 2393 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2394 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2395 return;
42113a75 2396 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2397 /* hmm. we are done with the inode, and in the process of freeing
2398 * the state_owner. we keep this around to process errors
2399 */
1da177e4
LT		 2400 switch (task->tk_status) {
2401 case 0:
f7e8917a
FI		 2402 if (calldata->roc)
2403 pnfs_roc_set_barrier(state->inode,
2404 calldata->roc_barrier);
45328c35 2405 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2406 renew_lease(server, calldata->timestamp);
88069f77
TM		 2407 nfs4_close_clear_stateid_flags(state,
2408 calldata->arg.fmode);
1da177e4
LT		 2409 break;
2410 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2411 case -NFS4ERR_OLD_STATEID:
2412 case -NFS4ERR_BAD_STATEID:
1da177e4 2413 case -NFS4ERR_EXPIRED:
dc0b027d 2414 if (calldata->arg.fmode == 0)
9e33bed5 2415 break;
1da177e4 2416 default:
72211dbe
TM		 2417 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2418 rpc_restart_call_prepare(task);
1da177e4 2419 }
72211dbe 2420 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2421 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2422 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2423}
2424
4ce70ada 2425static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2426{
4ce70ada 2427 struct nfs4_closedata *calldata = data;
9512135d 2428 struct nfs4_state *state = calldata->state;
7fdab069 2429 struct inode *inode = calldata->inode;
88069f77 2430 int call_close = 0;
9512135d 2431
a3ca5651 2432 dprintk("%s: begin!\n", __func__);
963d8fe5 2433 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2434 goto out_wait;
003707c7 2435
88069f77
TM		 2436 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2437 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2438 spin_lock(&state->owner->so_lock);
003707c7 2439 /* Calculate the change in open mode */
e7616923 2440 if (state->n_rdwr == 0) {
003707c7 2441 if (state->n_rdonly == 0) {
88069f77
TM		 2442 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2443 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2444 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2445 }
2446 if (state->n_wronly == 0) {
88069f77
TM		 2447 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2448 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2449 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2450 }
e7616923 2451 }
5d422301
TM		 2452 if (!nfs4_valid_open_stateid(state))
2453 call_close = 0;
4cecb76f 2454 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2455
2456 if (!call_close) {
963d8fe5 2457 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2458 goto out_no_action;
9512135d 2459 }
88069f77 2460
f7e8917a 2461 if (calldata->arg.fmode == 0) {
88069f77 2462 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2463 if (calldata->roc &&
b9536ad5
AA		 2464 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2465 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2466 goto out_wait;
b9536ad5 2467 }
f7e8917a 2468 }
88069f77 2469
516a6af6 2470 nfs_fattr_init(calldata->res.fattr);
26e976a8 2471 calldata->timestamp = jiffies;
7fdab069 2472 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2473 &calldata->arg.seq_args,
2474 &calldata->res.seq_res,
2240a9e2
TM		 2475 task) != 0)
2476 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2477 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2478 return;
2479out_no_action:
2480 task->tk_action = NULL;
2481out_wait:
2482 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2483}
2484
963d8fe5 2485static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2486 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2487 .rpc_call_done = nfs4_close_done,
2488 .rpc_release = nfs4_free_closedata,
2489};
2490
1da177e4
LT		 2491/*
2492 * It is possible for data to be read/written from a mem-mapped file
2493 * after the sys_close call (which hits the vfs layer as a flush).
2494 * This means that we can't safely call nfsv4 close on a file until
2495 * the inode is cleared. This in turn means that we are not good
2496 * NFSv4 citizens - we do not indicate to the server to update the file's
2497 * share state even when we are done with one of the three share
2498 * stateid's in the inode.
2499 *
2500 * NOTE: Caller must be holding the sp->so_owner semaphore!
2501 */
1f7977c1 2502int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2503{
4a35bd41 2504 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2505 struct nfs4_closedata *calldata;
b39e625b
TM		 2506 struct nfs4_state_owner *sp = state->owner;
2507 struct rpc_task *task;
5138fde0
TM		 2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2510 .rpc_cred = state->owner->so_cred,
2511 };
c970aa85
TM		 2512 struct rpc_task_setup task_setup_data = {
2513 .rpc_client = server->client,
5138fde0 2514 .rpc_message = &msg,
c970aa85 2515 .callback_ops = &nfs4_close_ops,
101070ca 2516 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2517 .flags = RPC_TASK_ASYNC,
2518 };
9512135d 2519 int status = -ENOMEM;
1da177e4 2520
8535b2be 2521 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2522 if (calldata == NULL)
9512135d 2523 goto out;
9d12b216 2524 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2525 calldata->inode = state->inode;
1da177e4 2526 calldata->state = state;
4a35bd41 2527 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2528 calldata->arg.stateid = &state->open_stateid;
1da177e4 2529 /* Serialization for the sequence id */
8535b2be 2530 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2531 if (calldata->arg.seqid == NULL)
2532 goto out_free_calldata;
dc0b027d 2533 calldata->arg.fmode = 0;
a65318bf 2534 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2535 calldata->res.fattr = &calldata->fattr;
c1d51931 2536 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2537 calldata->res.server = server;
1f7977c1 2538 calldata->roc = pnfs_roc(state->inode);
643168c2 2539 nfs_sb_active(calldata->inode->i_sb);
9512135d 2540
1174dd1f
TM		 2541 msg.rpc_argp = &calldata->arg;
2542 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2543 task_setup_data.callback_data = calldata;
2544 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2545 if (IS_ERR(task))
2546 return PTR_ERR(task);
a49c3c77
TM		 2547 status = 0;
2548 if (wait)
2549 status = rpc_wait_for_completion_task(task);
b39e625b 2550 rpc_put_task(task);
a49c3c77 2551 return status;
9512135d
TM		 2552out_free_calldata:
2553 kfree(calldata);
2554out:
b39e625b
TM		 2555 nfs4_put_open_state(state);
2556 nfs4_put_state_owner(sp);
9512135d 2557 return status;
1da177e4
LT		 2558}
2559
2b484297 2560static struct inode *
cd9a1c0e 2561nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2562{
1da177e4 2563 struct nfs4_state *state;
aa9c2669
DQ		 2564 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2565
2566 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2567
565277f6 2568 /* Protect against concurrent sillydeletes */
959d921f 2569 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2570
2571 nfs4_label_release_security(label);
2572
f46e0bd3
TM		 2573 if (IS_ERR(state))
2574 return ERR_CAST(state);
275bb307 2575 return state->inode;
1da177e4
LT		 2576}
2577
1185a552 2578static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2579{
2580 if (ctx->state == NULL)
2581 return;
2582 if (is_sync)
643168c2 2583 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2584 else
643168c2 2585 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2586}
1da177e4
LT		 2587
2588static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2589{
43652ad5
BH		 2590 struct nfs4_server_caps_arg args = {
2591 .fhandle = fhandle,
2592 };
1da177e4
LT		 2593 struct nfs4_server_caps_res res = {};
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2596 .rpc_argp = &args,
1da177e4
LT		 2597 .rpc_resp = &res,
2598 };
2599 int status;
2600
7c513058 2601 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2602 if (status == 0) {
2603 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2604 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2605 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2606 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2607 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2608 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2609 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2610 server->caps |= NFS_CAP_ACLS;
2611 if (res.has_links != 0)
2612 server->caps |= NFS_CAP_HARDLINKS;
2613 if (res.has_symlinks != 0)
2614 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2615 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2616 server->caps |= NFS_CAP_FILEID;
2617 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2618 server->caps |= NFS_CAP_MODE;
2619 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2620 server->caps |= NFS_CAP_NLINK;
2621 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2622 server->caps |= NFS_CAP_OWNER;
2623 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2624 server->caps |= NFS_CAP_OWNER_GROUP;
2625 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2626 server->caps |= NFS_CAP_ATIME;
2627 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2628 server->caps |= NFS_CAP_CTIME;
2629 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2630 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2631#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2632 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2633 server->caps |= NFS_CAP_SECURITY_LABEL;
2634#endif
2635 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2636 sizeof(server->attr_bitmask));
62ab460c 2637
aa9c2669
DQ		 2638 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2639 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2640 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2641 }
a65318bf
TM		 2642 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2643 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2644 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2645 server->acl_bitmask = res.acl_bitmask;
264e6351 2646 server->fh_expire_type = res.fh_expire_type;
1da177e4 2647 }
cccef3b9 2648
1da177e4
LT		 2649 return status;
2650}
2651
55a97593 2652int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2653{
2654 struct nfs4_exception exception = { };
2655 int err;
2656 do {
2657 err = nfs4_handle_exception(server,
2658 _nfs4_server_capabilities(server, fhandle),
2659 &exception);
2660 } while (exception.retry);
2661 return err;
2662}
2663
2664static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2665 struct nfs_fsinfo *info)
2666{
aa9c2669 2667 u32 bitmask[3];
1da177e4 2668 struct nfs4_lookup_root_arg args = {
aa9c2669 2669 .bitmask = bitmask,
1da177e4
LT		 2670 };
2671 struct nfs4_lookup_res res = {
2672 .server = server,
0e574af1 2673 .fattr = info->fattr,
1da177e4
LT		 2674 .fh = fhandle,
2675 };
2676 struct rpc_message msg = {
2677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2678 .rpc_argp = &args,
2679 .rpc_resp = &res,
2680 };
008f55d0 2681
aa9c2669
DQ		 2682 bitmask[0] = nfs4_fattr_bitmap[0];
2683 bitmask[1] = nfs4_fattr_bitmap[1];
2684 /*
2685 * Process the label in the upcoming getfattr
2686 */
2687 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2688
0e574af1 2689 nfs_fattr_init(info->fattr);
7c513058 2690 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2691}
2692
2693static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2694 struct nfs_fsinfo *info)
2695{
2696 struct nfs4_exception exception = { };
2697 int err;
2698 do {
fb8a5ba8
BS		 2699 err = _nfs4_lookup_root(server, fhandle, info);
2700 switch (err) {
2701 case 0:
2702 case -NFS4ERR_WRONGSEC:
05e9cfb4 2703 goto out;
fb8a5ba8
BS		 2704 default:
2705 err = nfs4_handle_exception(server, err, &exception);
2706 }
1da177e4 2707 } while (exception.retry);
05e9cfb4 2708out:
1da177e4
LT		 2709 return err;
2710}
2711
8f70e95f
BS		 2712static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2713 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2714{
2715 struct rpc_auth *auth;
2716 int ret;
2717
2718 auth = rpcauth_create(flavor, server->client);
e8d920c5 2719 if (IS_ERR(auth)) {
75bc8821 2720 ret = -EACCES;
8f70e95f
BS		 2721 goto out;
2722 }
2723 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2724out:
2725 return ret;
2726}
2727
9a744ba3
CL		 2728/*
2729 * Retry pseudoroot lookup with various security flavors. We do this when:
2730 *
2731 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2732 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2733 *
2734 * Returns zero on success, or a negative NFS4ERR value, or a
2735 * negative errno value.
2736 */
801a16dc 2737static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2738 struct nfs_fsinfo *info)
1da177e4 2739{
9a744ba3
CL		 2740 /* Per 3530bis 15.33.5 */
2741 static const rpc_authflavor_t flav_array[] = {
2742 RPC_AUTH_GSS_KRB5P,
2743 RPC_AUTH_GSS_KRB5I,
2744 RPC_AUTH_GSS_KRB5,
c4eafe11 2745 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2746 RPC_AUTH_NULL,
2747 };
2748 int status = -EPERM;
2749 size_t i;
6a1a1e34 2750
9a744ba3 2751 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2752 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2753 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2754 continue;
2755 break;
8f70e95f 2756 }
9a744ba3 2757
fb8a5ba8
BS		 2758 /*
2759 * -EACCESS could mean that the user doesn't have correct permissions
2760 * to access the mount. It could also mean that we tried to mount
2761 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2762 * existing mount programs don't handle -EACCES very well so it should
2763 * be mapped to -EPERM instead.
2764 */
2765 if (status == -EACCES)
2766 status = -EPERM;
801a16dc
BS		 2767 return status;
2768}
2769
2ed4b95b
CL		 2770static int nfs4_do_find_root_sec(struct nfs_server *server,
2771 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2772{
2773 int mv = server->nfs_client->cl_minorversion;
2774 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2775}
2776
2777/**
2778 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2779 * @server: initialized nfs_server handle
2780 * @fhandle: we fill in the pseudo-fs root file handle
2781 * @info: we fill in an FSINFO struct
2782 *
2783 * Returns zero on success, or a negative errno.
801a16dc 2784 */
3028eb2b
BS		 2785int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2786 struct nfs_fsinfo *info)
801a16dc 2787{
2ed4b95b
CL		 2788 int status;
2789
2790 status = nfs4_lookup_root(server, fhandle, info);
2791 if ((status == -NFS4ERR_WRONGSEC) &&
2792 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2793 status = nfs4_do_find_root_sec(server, fhandle, info);
2794
1da177e4
LT		 2795 if (status == 0)
2796 status = nfs4_server_capabilities(server, fhandle);
2797 if (status == 0)
2798 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2799
c12e87f4 2800 return nfs4_map_errors(status);
1da177e4
LT		 2801}
2802
bae36241
BS		 2803static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2804 struct nfs_fsinfo *info)
2805{
2806 int error;
2807 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2808 struct nfs4_label *label = NULL;
bae36241
BS		 2809
2810 error = nfs4_server_capabilities(server, mntfh);
2811 if (error < 0) {
2812 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2813 return error;
2814 }
2815
14c43f76
DQ		 2816 label = nfs4_label_alloc(server, GFP_KERNEL);
2817 if (IS_ERR(label))
2818 return PTR_ERR(label);
2819
1775fd3e 2820 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2821 if (error < 0) {
2822 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2823 goto err_free_label;
bae36241
BS		 2824 }
2825
2826 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2827 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2828 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2829
14c43f76
DQ		 2830err_free_label:
2831 nfs4_label_free(label);
2832
bae36241
BS		 2833 return error;
2834}
2835
6b97fd3d
MN		 2836/*
2837 * Get locations and (maybe) other attributes of a referral.
2838 * Note that we'll actually follow the referral later when
2839 * we detect fsid mismatch in inode revalidation
2840 */
f05d147f
BS		 2841static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2842 const struct qstr *name, struct nfs_fattr *fattr,
2843 struct nfs_fh *fhandle)
6b97fd3d
MN		 2844{
2845 int status = -ENOMEM;
2846 struct page *page = NULL;
2847 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2848
2849 page = alloc_page(GFP_KERNEL);
2850 if (page == NULL)
2851 goto out;
2852 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2853 if (locations == NULL)
2854 goto out;
2855
f05d147f 2856 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2857 if (status != 0)
2858 goto out;
2859 /* Make sure server returned a different fsid for the referral */
2860 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2861 dprintk("%s: server did not return a different fsid for"
2862 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2863 status = -EIO;
2864 goto out;
2865 }
533eb461
AA		 2866 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2867 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2868
533eb461 2869 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2870 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2871 memset(fhandle, 0, sizeof(struct nfs_fh));
2872out:
2873 if (page)
2874 __free_page(page);
5d7ca35a 2875 kfree(locations);
6b97fd3d
MN		 2876 return status;
2877}
2878
1775fd3e
DQ		 2879static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2880 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2881{
2882 struct nfs4_getattr_arg args = {
2883 .fh = fhandle,
2884 .bitmask = server->attr_bitmask,
2885 };
2886 struct nfs4_getattr_res res = {
2887 .fattr = fattr,
1775fd3e 2888 .label = label,
1da177e4
LT		 2889 .server = server,
2890 };
2891 struct rpc_message msg = {
2892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2893 .rpc_argp = &args,
2894 .rpc_resp = &res,
2895 };
aa9c2669
DQ		 2896
2897 args.bitmask = nfs4_bitmask(server, label);
2898
0e574af1 2899 nfs_fattr_init(fattr);
7c513058 2900 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2901}
2902
1775fd3e
DQ		 2903static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2904 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2905{
2906 struct nfs4_exception exception = { };
2907 int err;
2908 do {
2909 err = nfs4_handle_exception(server,
1775fd3e 2910 _nfs4_proc_getattr(server, fhandle, fattr, label),
1da177e4
LT		 2911 &exception);
2912 } while (exception.retry);
2913 return err;
2914}
2915
2916/*
2917 * The file is not closed if it is opened due to the a request to change
2918 * the size of the file. The open call will not be needed once the
2919 * VFS layer lookup-intents are implemented.
2920 *
2921 * Close is called when the inode is destroyed.
2922 * If we haven't opened the file for O_WRONLY, we
2923 * need to in the size_change case to obtain a stateid.
2924 *
2925 * Got race?
2926 * Because OPEN is always done by name in nfsv4, it is
2927 * possible that we opened a different file by the same
2928 * name. We can recognize this race condition, but we
2929 * can't do anything about it besides returning an error.
2930 *
2931 * This will be fixed with VFS changes (lookup-intent).
2932 */
2933static int
2934nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2935 struct iattr *sattr)
2936{
08e9eac4 2937 struct inode *inode = dentry->d_inode;
659bfcd6 2938 struct rpc_cred *cred = NULL;
d530838b 2939 struct nfs4_state *state = NULL;
14c43f76 2940 struct nfs4_label *label = NULL;
1da177e4
LT		 2941 int status;
2942
8a1636c4 2943 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2944 pnfs_commit_and_return_layout(inode);
8a1636c4 2945
0e574af1 2946 nfs_fattr_init(fattr);
1da177e4 2947
2669940d
AA		 2948 /* Deal with open(O_TRUNC) */
2949 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2950 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2951
2952 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2953 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2954 return 0;
2955
d530838b 2956 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2957 if (sattr->ia_valid & ATTR_FILE) {
2958 struct nfs_open_context *ctx;
2959
2960 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2961 if (ctx) {
2962 cred = ctx->cred;
2963 state = ctx->state;
2964 }
659bfcd6 2965 }
08e9eac4 2966
14c43f76
DQ		 2967 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2968 if (IS_ERR(label))
2969 return PTR_ERR(label);
2970
2971 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2972 if (status == 0) {
65e4308d 2973 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2974 nfs_setsecurity(inode, fattr, label);
2975 }
14c43f76 2976 nfs4_label_free(label);
1da177e4
LT		 2977 return status;
2978}
2979
0c2e53f1
TM		 2980static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2981 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2982 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2983{
0c2e53f1 2984 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2985 int status;
2986 struct nfs4_lookup_arg args = {
2987 .bitmask = server->attr_bitmask,
0c2e53f1 2988 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2989 .name = name,
2990 };
2991 struct nfs4_lookup_res res = {
2992 .server = server,
2993 .fattr = fattr,
aa9c2669 2994 .label = label,
2b3de441
DH		 2995 .fh = fhandle,
2996 };
2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2999 .rpc_argp = &args,
3000 .rpc_resp = &res,
3001 };
3002
aa9c2669
DQ		 3003 args.bitmask = nfs4_bitmask(server, label);
3004
2b3de441
DH		 3005 nfs_fattr_init(fattr);
3006
1da177e4 3007 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3008 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3009 dprintk("NFS reply lookup: %d\n", status);
3010 return status;
3011}
3012
72de53ec 3013static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3014{
7ebb9315 3015 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3016 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3017 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3018 fattr->nlink = 2;
3019}
3020
72de53ec
BS		 3021static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3022 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3023 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3024{
3025 struct nfs4_exception exception = { };
72de53ec 3026 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3027 int err;
3028 do {
1775fd3e 3029 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3030 trace_nfs4_lookup(dir, name, err);
72de53ec 3031 switch (err) {
08ef7bd3 3032 case -NFS4ERR_BADNAME:
72de53ec
BS		 3033 err = -ENOENT;
3034 goto out;
0c2e53f1 3035 case -NFS4ERR_MOVED:
f05d147f 3036 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3037 goto out;
0c2e53f1 3038 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3039 err = -EPERM;
3040 if (client != *clnt)
3041 goto out;
3042
3043 client = nfs4_create_sec_client(client, dir, name);
3044 if (IS_ERR(client))
3045 return PTR_ERR(client);
3046
3047 exception.retry = 1;
3048 break;
3049 default:
3050 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3051 }
1da177e4 3052 } while (exception.retry);
72de53ec
BS		 3053
3054out:
3055 if (err == 0)
3056 *clnt = client;
3057 else if (client != *clnt)
3058 rpc_shutdown_client(client);
3059
1da177e4
LT		 3060 return err;
3061}
3062
80a16b21 3063static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3064 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3065 struct nfs4_label *label)
72de53ec
BS		 3066{
3067 int status;
3068 struct rpc_clnt *client = NFS_CLIENT(dir);
3069
1775fd3e 3070 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3071 if (client != NFS_CLIENT(dir)) {
3072 rpc_shutdown_client(client);
3073 nfs_fixup_secinfo_attributes(fattr);
3074 }
3075 return status;
3076}
3077
f05d147f
BS		 3078struct rpc_clnt *
3079nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3080 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3081{
3082 int status;
3083 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3084
1775fd3e 3085 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3086 if (status < 0) {
3087 rpc_shutdown_client(client);
3088 return ERR_PTR(status);
3089 }
3090 return client;
3091}
3092
1da177e4
LT		 3093static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3094{
76b32999 3095 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3096 struct nfs4_accessargs args = {
3097 .fh = NFS_FH(inode),
a4980e78 3098 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3099 };
3100 struct nfs4_accessres res = {
3101 .server = server,
1da177e4 3102 };
1da177e4
LT		 3103 struct rpc_message msg = {
3104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3105 .rpc_argp = &args,
3106 .rpc_resp = &res,
3107 .rpc_cred = entry->cred,
3108 };
3109 int mode = entry->mask;
aa9c2669 3110 int status = 0;
1da177e4
LT		 3111
3112 /*
3113 * Determine which access bits we want to ask for...
3114 */
3115 if (mode & MAY_READ)
3116 args.access |= NFS4_ACCESS_READ;
3117 if (S_ISDIR(inode->i_mode)) {
3118 if (mode & MAY_WRITE)
3119 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3120 if (mode & MAY_EXEC)
3121 args.access |= NFS4_ACCESS_LOOKUP;
3122 } else {
3123 if (mode & MAY_WRITE)
3124 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3125 if (mode & MAY_EXEC)
3126 args.access |= NFS4_ACCESS_EXECUTE;
3127 }
c407d41a
TM		 3128
3129 res.fattr = nfs_alloc_fattr();
3130 if (res.fattr == NULL)
3131 return -ENOMEM;
3132
7c513058 3133 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3134 if (!status) {
6168f62c 3135 nfs_access_set_mask(entry, res.access);
c407d41a 3136 nfs_refresh_inode(inode, res.fattr);
1da177e4 3137 }
c407d41a 3138 nfs_free_fattr(res.fattr);
1da177e4
LT		 3139 return status;
3140}
3141
3142static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3143{
3144 struct nfs4_exception exception = { };
3145 int err;
3146 do {
c1578b76
TM		 3147 err = _nfs4_proc_access(inode, entry);
3148 trace_nfs4_access(inode, err);
3149 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3150 &exception);
3151 } while (exception.retry);
3152 return err;
3153}
3154
3155/*
3156 * TODO: For the time being, we don't try to get any attributes
3157 * along with any of the zero-copy operations READ, READDIR,
3158 * READLINK, WRITE.
3159 *
3160 * In the case of the first three, we want to put the GETATTR
3161 * after the read-type operation -- this is because it is hard
3162 * to predict the length of a GETATTR response in v4, and thus
3163 * align the READ data correctly. This means that the GETATTR
3164 * may end up partially falling into the page cache, and we should
3165 * shift it into the 'tail' of the xdr_buf before processing.
3166 * To do this efficiently, we need to know the total length
3167 * of data received, which doesn't seem to be available outside
3168 * of the RPC layer.
3169 *
3170 * In the case of WRITE, we also want to put the GETATTR after
3171 * the operation -- in this case because we want to make sure
140150db 3172 * we get the post-operation mtime and size.
1da177e4
LT		 3173 *
3174 * Both of these changes to the XDR layer would in fact be quite
3175 * minor, but I decided to leave them for a subsequent patch.
3176 */
3177static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3178 unsigned int pgbase, unsigned int pglen)
3179{
3180 struct nfs4_readlink args = {
3181 .fh = NFS_FH(inode),
3182 .pgbase = pgbase,
3183 .pglen = pglen,
3184 .pages = &page,
3185 };
f50c7000 3186 struct nfs4_readlink_res res;
1da177e4
LT		 3187 struct rpc_message msg = {
3188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3189 .rpc_argp = &args,
f50c7000 3190 .rpc_resp = &res,
1da177e4
LT		 3191 };
3192
7c513058 3193 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3194}
3195
3196static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3197 unsigned int pgbase, unsigned int pglen)
3198{
3199 struct nfs4_exception exception = { };
3200 int err;
3201 do {
c1578b76
TM		 3202 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3203 trace_nfs4_readlink(inode, err);
3204 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3205 &exception);
3206 } while (exception.retry);
3207 return err;
3208}
3209
1da177e4 3210/*
8867fe58 3211 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3212 */
1da177e4
LT		 3213static int
3214nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3215 int flags)
1da177e4 3216{
aa9c2669 3217 struct nfs4_label l, *ilabel = NULL;
8867fe58 3218 struct nfs_open_context *ctx;
1da177e4 3219 struct nfs4_state *state;
1da177e4
LT		 3220 int status = 0;
3221
8867fe58
MS		 3222 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3223 if (IS_ERR(ctx))
3224 return PTR_ERR(ctx);
3225
aa9c2669
DQ		 3226 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3227
a8a5da99 3228 sattr->ia_mode &= ~current_umask();
959d921f 3229 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3230 if (IS_ERR(state)) {
3231 status = PTR_ERR(state);
c0204fd2 3232 goto out;
1da177e4 3233 }
1da177e4 3234out:
aa9c2669 3235 nfs4_label_release_security(ilabel);
8867fe58 3236 put_nfs_open_context(ctx);
1da177e4
LT		 3237 return status;
3238}
3239
3240static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3241{
16e42959 3242 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3243 struct nfs_removeargs args = {
1da177e4 3244 .fh = NFS_FH(dir),
26fe5750 3245 .name = *name,
16e42959 3246 };
4fdc17b2 3247 struct nfs_removeres res = {
16e42959 3248 .server = server,
1da177e4 3249 };
1da177e4 3250 struct rpc_message msg = {
4fdc17b2
TM		 3251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3252 .rpc_argp = &args,
3253 .rpc_resp = &res,
1da177e4 3254 };
778d2817 3255 int status;
1da177e4 3256
7c513058 3257 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3258 if (status == 0)
16e42959 3259 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3260 return status;
3261}
3262
3263static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3264{
3265 struct nfs4_exception exception = { };
3266 int err;
3267 do {
078ea3df
TM		 3268 err = _nfs4_proc_remove(dir, name);
3269 trace_nfs4_remove(dir, name, err);
3270 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3271 &exception);
3272 } while (exception.retry);
3273 return err;
3274}
3275
e4eff1a6 3276static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3277{
e4eff1a6
TM		 3278 struct nfs_server *server = NFS_SERVER(dir);
3279 struct nfs_removeargs *args = msg->rpc_argp;
3280 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3281
e4eff1a6 3282 res->server = server;
1da177e4 3283 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3284 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3285
3286 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3287}
3288
34e137cc
BS		 3289static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3290{
d9afbd1b
TM		 3291 nfs4_setup_sequence(NFS_SERVER(data->dir),
3292 &data->args.seq_args,
3293 &data->res.seq_res,
3294 task);
1da177e4
LT		 3295}
3296
e4eff1a6 3297static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3298{
078ea3df
TM		 3299 struct nfs_unlinkdata *data = task->tk_calldata;
3300 struct nfs_removeres *res = &data->res;
e4eff1a6 3301
14516c3a
TM		 3302 if (!nfs4_sequence_done(task, &res->seq_res))
3303 return 0;
9e33bed5 3304 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3305 return 0;
3306 update_changeattr(dir, &res->cinfo);
e4eff1a6 3307 return 1;
1da177e4
LT		 3308}
3309
d3d4152a
JL		 3310static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3311{
3312 struct nfs_server *server = NFS_SERVER(dir);
3313 struct nfs_renameargs *arg = msg->rpc_argp;
3314 struct nfs_renameres *res = msg->rpc_resp;
3315
3316 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3317 res->server = server;
9d12b216 3318 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3319}
3320
c6bfa1a1
BS		 3321static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3322{
d9afbd1b
TM		 3323 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3324 &data->args.seq_args,
3325 &data->res.seq_res,
3326 task);
d3d4152a
JL		 3327}
3328
3329static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3330 struct inode *new_dir)
3331{
3332 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3333
3334 if (!nfs4_sequence_done(task, &res->seq_res))
3335 return 0;
3336 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3337 return 0;
3338
3339 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3340 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3341 return 1;
3342}
3343
1da177e4
LT		 3344static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3345 struct inode *new_dir, struct qstr *new_name)
3346{
6caf2c82 3347 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3348 struct nfs_renameargs arg = {
1da177e4
LT		 3349 .old_dir = NFS_FH(old_dir),
3350 .new_dir = NFS_FH(new_dir),
3351 .old_name = old_name,
3352 .new_name = new_name,
6caf2c82 3353 };
e8582a8b 3354 struct nfs_renameres res = {
6caf2c82 3355 .server = server,
1da177e4 3356 };
1da177e4
LT		 3357 struct rpc_message msg = {
3358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3359 .rpc_argp = &arg,
3360 .rpc_resp = &res,
3361 };
011fff72 3362 int status = -ENOMEM;
14c43f76 3363
7c513058 3364 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3365 if (!status) {
3366 update_changeattr(old_dir, &res.old_cinfo);
3367 update_changeattr(new_dir, &res.new_cinfo);
3368 }
3369 return status;
3370}
3371
3372static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3373 struct inode *new_dir, struct qstr *new_name)
3374{
3375 struct nfs4_exception exception = { };
3376 int err;
3377 do {
3378 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3379 _nfs4_proc_rename(old_dir, old_name,
3380 new_dir, new_name),
3381 &exception);
3382 } while (exception.retry);
3383 return err;
3384}
3385
3386static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3387{
91ba2eee 3388 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3389 struct nfs4_link_arg arg = {
3390 .fh = NFS_FH(inode),
3391 .dir_fh = NFS_FH(dir),
3392 .name = name,
91ba2eee
TM		 3393 .bitmask = server->attr_bitmask,
3394 };
91ba2eee
TM		 3395 struct nfs4_link_res res = {
3396 .server = server,
1775fd3e 3397 .label = NULL,
1da177e4 3398 };
1da177e4
LT		 3399 struct rpc_message msg = {
3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3401 .rpc_argp = &arg,
91ba2eee 3402 .rpc_resp = &res,
1da177e4 3403 };
136f2627
TM		 3404 int status = -ENOMEM;
3405
3406 res.fattr = nfs_alloc_fattr();
778d2817 3407 if (res.fattr == NULL)
136f2627 3408 goto out;
1da177e4 3409
14c43f76
DQ		 3410 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3411 if (IS_ERR(res.label)) {
3412 status = PTR_ERR(res.label);
3413 goto out;
3414 }
aa9c2669 3415 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3416
7c513058 3417 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3418 if (!status) {
3419 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3420 status = nfs_post_op_update_inode(inode, res.fattr);
3421 if (!status)
3422 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3423 }
14c43f76
DQ		 3424
3425
3426 nfs4_label_free(res.label);
3427
136f2627 3428out:
136f2627 3429 nfs_free_fattr(res.fattr);
1da177e4
LT		 3430 return status;
3431}
3432
3433static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3434{
3435 struct nfs4_exception exception = { };
3436 int err;
3437 do {
3438 err = nfs4_handle_exception(NFS_SERVER(inode),
3439 _nfs4_proc_link(inode, dir, name),
3440 &exception);
3441 } while (exception.retry);
3442 return err;
3443}
3444
57dc9a57
TM		 3445struct nfs4_createdata {
3446 struct rpc_message msg;
3447 struct nfs4_create_arg arg;
3448 struct nfs4_create_res res;
3449 struct nfs_fh fh;
3450 struct nfs_fattr fattr;
1775fd3e 3451 struct nfs4_label *label;
57dc9a57
TM		 3452};
3453
3454static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3455 struct qstr *name, struct iattr *sattr, u32 ftype)
3456{
3457 struct nfs4_createdata *data;
3458
3459 data = kzalloc(sizeof(*data), GFP_KERNEL);
3460 if (data != NULL) {
3461 struct nfs_server *server = NFS_SERVER(dir);
3462
14c43f76
DQ		 3463 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3464 if (IS_ERR(data->label))
3465 goto out_free;
3466
57dc9a57
TM		 3467 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3468 data->msg.rpc_argp = &data->arg;
3469 data->msg.rpc_resp = &data->res;
3470 data->arg.dir_fh = NFS_FH(dir);
3471 data->arg.server = server;
3472 data->arg.name = name;
3473 data->arg.attrs = sattr;
3474 data->arg.ftype = ftype;
aa9c2669 3475 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3476 data->res.server = server;
3477 data->res.fh = &data->fh;
3478 data->res.fattr = &data->fattr;
1775fd3e 3479 data->res.label = data->label;
57dc9a57 3480 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3481 }
3482 return data;
14c43f76
DQ		 3483out_free:
3484 kfree(data);
3485 return NULL;
57dc9a57
TM		 3486}
3487
3488static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3489{
7c513058 3490 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3491 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3492 if (status == 0) {
3493 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3494 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3495 }
3496 return status;
3497}
3498
3499static void nfs4_free_createdata(struct nfs4_createdata *data)
3500{
14c43f76 3501 nfs4_label_free(data->label);
57dc9a57
TM		 3502 kfree(data);
3503}
3504
4f390c15 3505static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3506 struct page *page, unsigned int len, struct iattr *sattr,
3507 struct nfs4_label *label)
1da177e4 3508{
57dc9a57
TM		 3509 struct nfs4_createdata *data;
3510 int status = -ENAMETOOLONG;
1da177e4 3511
94a6d753 3512 if (len > NFS4_MAXPATHLEN)
57dc9a57 3513 goto out;
4f390c15 3514
57dc9a57
TM		 3515 status = -ENOMEM;
3516 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3517 if (data == NULL)
3518 goto out;
3519
3520 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3521 data->arg.u.symlink.pages = &page;
3522 data->arg.u.symlink.len = len;
1775fd3e 3523 data->arg.label = label;
1da177e4 3524
57dc9a57
TM		 3525 status = nfs4_do_create(dir, dentry, data);
3526
3527 nfs4_free_createdata(data);
3528out:
1da177e4
LT		 3529 return status;
3530}
3531
4f390c15 3532static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3533 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3534{
3535 struct nfs4_exception exception = { };
aa9c2669 3536 struct nfs4_label l, *label = NULL;
1da177e4 3537 int err;
aa9c2669
DQ		 3538
3539 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3540
1da177e4 3541 do {
078ea3df
TM		 3542 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3543 trace_nfs4_symlink(dir, &dentry->d_name, err);
3544 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3545 &exception);
3546 } while (exception.retry);
aa9c2669
DQ		 3547
3548 nfs4_label_release_security(label);
1da177e4
LT		 3549 return err;
3550}
3551
3552static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3553 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3554{
57dc9a57
TM		 3555 struct nfs4_createdata *data;
3556 int status = -ENOMEM;
1da177e4 3557
57dc9a57
TM		 3558 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3559 if (data == NULL)
3560 goto out;
3561
1775fd3e 3562 data->arg.label = label;
57dc9a57
TM		 3563 status = nfs4_do_create(dir, dentry, data);
3564
3565 nfs4_free_createdata(data);
3566out:
1da177e4
LT		 3567 return status;
3568}
3569
3570static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3571 struct iattr *sattr)
3572{
3573 struct nfs4_exception exception = { };
aa9c2669 3574 struct nfs4_label l, *label = NULL;
1da177e4 3575 int err;
a8a5da99 3576
aa9c2669
DQ		 3577 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3578
a8a5da99 3579 sattr->ia_mode &= ~current_umask();
1da177e4 3580 do {
078ea3df
TM		 3581 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3582 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3583 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3584 &exception);
3585 } while (exception.retry);
aa9c2669
DQ		 3586 nfs4_label_release_security(label);
3587
1da177e4
LT		 3588 return err;
3589}
3590
3591static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3592 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3593{
3594 struct inode *dir = dentry->d_inode;
3595 struct nfs4_readdir_arg args = {
3596 .fh = NFS_FH(dir),
56e4ebf8 3597 .pages = pages,
1da177e4
LT		 3598 .pgbase = 0,
3599 .count = count,
96d25e53 3600 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3601 .plus = plus,
1da177e4
LT		 3602 };
3603 struct nfs4_readdir_res res;
3604 struct rpc_message msg = {
3605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3606 .rpc_argp = &args,
3607 .rpc_resp = &res,
3608 .rpc_cred = cred,
3609 };
3610 int status;
3611
3110ff80 3612 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3613 dentry->d_parent->d_name.name,
3614 dentry->d_name.name,
3615 (unsigned long long)cookie);
c3f52af3 3616 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3617 res.pgbase = args.pgbase;
7c513058 3618 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3619 if (status >= 0) {
c3f52af3 3620 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3621 status += args.pgbase;
3622 }
c4812998
TM		 3623
3624 nfs_invalidate_atime(dir);
3625
3110ff80 3626 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3627 return status;
3628}
3629
3630static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3631 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3632{
3633 struct nfs4_exception exception = { };
3634 int err;
3635 do {
c1578b76
TM		 3636 err = _nfs4_proc_readdir(dentry, cred, cookie,
3637 pages, count, plus);
3638 trace_nfs4_readdir(dentry->d_inode, err);
3639 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3640 &exception);
3641 } while (exception.retry);
3642 return err;
3643}
3644
3645static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3646 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3647{
57dc9a57
TM		 3648 struct nfs4_createdata *data;
3649 int mode = sattr->ia_mode;
3650 int status = -ENOMEM;
1da177e4 3651
57dc9a57
TM		 3652 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3653 if (data == NULL)
3654 goto out;
3655
1da177e4 3656 if (S_ISFIFO(mode))
57dc9a57 3657 data->arg.ftype = NF4FIFO;
1da177e4 3658 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3659 data->arg.ftype = NF4BLK;
3660 data->arg.u.device.specdata1 = MAJOR(rdev);
3661 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3662 }
3663 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3664 data->arg.ftype = NF4CHR;
3665 data->arg.u.device.specdata1 = MAJOR(rdev);
3666 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3667 } else if (!S_ISSOCK(mode)) {
3668 status = -EINVAL;
3669 goto out_free;
1da177e4 3670 }
1775fd3e 3671
aa9c2669 3672 data->arg.label = label;
57dc9a57 3673 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3674out_free:
57dc9a57
TM		 3675 nfs4_free_createdata(data);
3676out:
1da177e4
LT		 3677 return status;
3678}
3679
3680static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3681 struct iattr *sattr, dev_t rdev)
3682{
3683 struct nfs4_exception exception = { };
aa9c2669 3684 struct nfs4_label l, *label = NULL;
1da177e4 3685 int err;
a8a5da99 3686
aa9c2669
DQ		 3687 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3688
a8a5da99 3689 sattr->ia_mode &= ~current_umask();
1da177e4 3690 do {
078ea3df
TM		 3691 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3692 trace_nfs4_mknod(dir, &dentry->d_name, err);
3693 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3694 &exception);
3695 } while (exception.retry);
aa9c2669
DQ		 3696
3697 nfs4_label_release_security(label);
3698
1da177e4
LT		 3699 return err;
3700}
3701
3702static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3703 struct nfs_fsstat *fsstat)
3704{
3705 struct nfs4_statfs_arg args = {
3706 .fh = fhandle,
3707 .bitmask = server->attr_bitmask,
3708 };
24ad148a
BH		 3709 struct nfs4_statfs_res res = {
3710 .fsstat = fsstat,
3711 };
1da177e4
LT		 3712 struct rpc_message msg = {
3713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3714 .rpc_argp = &args,
24ad148a 3715 .rpc_resp = &res,
1da177e4
LT		 3716 };
3717
0e574af1 3718 nfs_fattr_init(fsstat->fattr);
7c513058 3719 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3720}
3721
3722static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3723{
3724 struct nfs4_exception exception = { };
3725 int err;
3726 do {
3727 err = nfs4_handle_exception(server,
3728 _nfs4_proc_statfs(server, fhandle, fsstat),
3729 &exception);
3730 } while (exception.retry);
3731 return err;
3732}
3733
3734static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3735 struct nfs_fsinfo *fsinfo)
3736{
3737 struct nfs4_fsinfo_arg args = {
3738 .fh = fhandle,
3739 .bitmask = server->attr_bitmask,
3740 };
3dda5e43
BH		 3741 struct nfs4_fsinfo_res res = {
3742 .fsinfo = fsinfo,
3743 };
1da177e4
LT		 3744 struct rpc_message msg = {
3745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3746 .rpc_argp = &args,
3dda5e43 3747 .rpc_resp = &res,
1da177e4
LT		 3748 };
3749
7c513058 3750 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3751}
3752
3753static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3754{
3755 struct nfs4_exception exception = { };
83ca7f5a 3756 unsigned long now = jiffies;
1da177e4
LT		 3757 int err;
3758
3759 do {
83ca7f5a
CL		 3760 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3761 if (err == 0) {
3762 struct nfs_client *clp = server->nfs_client;
3763
3764 spin_lock(&clp->cl_lock);
3765 clp->cl_lease_time = fsinfo->lease_time * HZ;
3766 clp->cl_last_renewal = now;
3767 spin_unlock(&clp->cl_lock);
3768 break;
3769 }
3770 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3771 } while (exception.retry);
3772 return err;
3773}
3774
3775static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3776{
e38eb650
BS		 3777 int error;
3778
0e574af1 3779 nfs_fattr_init(fsinfo->fattr);
e38eb650 3780 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3781 if (error == 0) {
3782 /* block layout checks this! */
3783 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3784 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3785 }
e38eb650
BS		 3786
3787 return error;
1da177e4
LT		 3788}
3789
3790static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3791 struct nfs_pathconf *pathconf)
3792{
3793 struct nfs4_pathconf_arg args = {
3794 .fh = fhandle,
3795 .bitmask = server->attr_bitmask,
3796 };
d45b2989
BH		 3797 struct nfs4_pathconf_res res = {
3798 .pathconf = pathconf,
3799 };
1da177e4
LT		 3800 struct rpc_message msg = {
3801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3802 .rpc_argp = &args,
d45b2989 3803 .rpc_resp = &res,
1da177e4
LT		 3804 };
3805
3806 /* None of the pathconf attributes are mandatory to implement */
3807 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3808 memset(pathconf, 0, sizeof(*pathconf));
3809 return 0;
3810 }
3811
0e574af1 3812 nfs_fattr_init(pathconf->fattr);
7c513058 3813 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3814}
3815
3816static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3817 struct nfs_pathconf *pathconf)
3818{
3819 struct nfs4_exception exception = { };
3820 int err;
3821
3822 do {
3823 err = nfs4_handle_exception(server,
3824 _nfs4_proc_pathconf(server, fhandle, pathconf),
3825 &exception);
3826 } while (exception.retry);
3827 return err;
3828}
3829
5521abfd 3830int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3831 const struct nfs_open_context *ctx,
3832 const struct nfs_lock_context *l_ctx,
3833 fmode_t fmode)
3834{
3835 const struct nfs_lockowner *lockowner = NULL;
3836
3837 if (l_ctx != NULL)
3838 lockowner = &l_ctx->lockowner;
5521abfd 3839 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3840}
3841EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3842
5521abfd
TM		 3843static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3844 const struct nfs_open_context *ctx,
3845 const struct nfs_lock_context *l_ctx,
3846 fmode_t fmode)
3847{
3848 nfs4_stateid current_stateid;
3849
3850 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3851 return false;
3852 return nfs4_stateid_match(stateid, &current_stateid);
3853}
3854
3855static bool nfs4_error_stateid_expired(int err)
3856{
3857 switch (err) {
3858 case -NFS4ERR_DELEG_REVOKED:
3859 case -NFS4ERR_ADMIN_REVOKED:
3860 case -NFS4ERR_BAD_STATEID:
3861 case -NFS4ERR_STALE_STATEID:
3862 case -NFS4ERR_OLD_STATEID:
3863 case -NFS4ERR_OPENMODE:
3864 case -NFS4ERR_EXPIRED:
3865 return true;
3866 }
3867 return false;
3868}
3869
d20581aa
BH		 3870void __nfs4_read_done_cb(struct nfs_read_data *data)
3871{
cd841605 3872 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3873}
3874
cbdabc7f 3875static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3876{
cd841605 3877 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3878
9e33bed5 3879 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3880 rpc_restart_call_prepare(task);
ec06c096 3881 return -EAGAIN;
1da177e4 3882 }
8850df99 3883
d20581aa 3884 __nfs4_read_done_cb(data);
1da177e4 3885 if (task->tk_status > 0)
ec06c096
TM		 3886 renew_lease(server, data->timestamp);
3887 return 0;
1da177e4
LT		 3888}
3889
5521abfd
TM		 3890static bool nfs4_read_stateid_changed(struct rpc_task *task,
3891 struct nfs_readargs *args)
3892{
3893
3894 if (!nfs4_error_stateid_expired(task->tk_status) ||
3895 nfs4_stateid_is_current(&args->stateid,
3896 args->context,
3897 args->lock_context,
3898 FMODE_READ))
3899 return false;
3900 rpc_restart_call_prepare(task);
3901 return true;
3902}
3903
cbdabc7f
AA		 3904static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3905{
3906
3907 dprintk("--> %s\n", __func__);
3908
3909 if (!nfs4_sequence_done(task, &data->res.seq_res))
3910 return -EAGAIN;
5521abfd
TM		 3911 if (nfs4_read_stateid_changed(task, &data->args))
3912 return -EAGAIN;
d20581aa
BH		 3913 return data->read_done_cb ? data->read_done_cb(task, data) :
3914 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3915}
3916
bdc7f021 3917static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3918{
1da177e4 3919 data->timestamp = jiffies;
cbdabc7f 3920 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3921 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3922 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3923}
3924
ea7c3303
BS		 3925static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3926{
9b206149 3927 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3928 &data->args.seq_args,
3929 &data->res.seq_res,
9b206149
TM		 3930 task))
3931 return;
3932 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3933 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3934}
3935
b029bc9b 3936static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3937{
cd841605 3938 struct inode *inode = data->header->inode;
1da177e4 3939
9e33bed5 3940 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3941 rpc_restart_call_prepare(task);
788e7a89 3942 return -EAGAIN;
1da177e4 3943 }
4f9838c7 3944 if (task->tk_status >= 0) {
1da177e4 3945 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3946 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3947 }
788e7a89 3948 return 0;
1da177e4
LT		 3949}
3950
5521abfd
TM		 3951static bool nfs4_write_stateid_changed(struct rpc_task *task,
3952 struct nfs_writeargs *args)
3953{
3954
3955 if (!nfs4_error_stateid_expired(task->tk_status) ||
3956 nfs4_stateid_is_current(&args->stateid,
3957 args->context,
3958 args->lock_context,
3959 FMODE_WRITE))
3960 return false;
3961 rpc_restart_call_prepare(task);
3962 return true;
3963}
3964
b029bc9b
FI		 3965static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3966{
3967 if (!nfs4_sequence_done(task, &data->res.seq_res))
3968 return -EAGAIN;
5521abfd
TM		 3969 if (nfs4_write_stateid_changed(task, &data->args))
3970 return -EAGAIN;
d20581aa
BH		 3971 return data->write_done_cb ? data->write_done_cb(task, data) :
3972 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3973}
3974
5a37f851
TM		 3975static
3976bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3977{
5a37f851
TM		 3978 const struct nfs_pgio_header *hdr = data->header;
3979
3980 /* Don't request attributes for pNFS or O_DIRECT writes */
3981 if (data->ds_clp != NULL || hdr->dreq != NULL)
3982 return false;
3983 /* Otherwise, request attributes if and only if we don't hold
3984 * a delegation
3985 */
011e2a7f 3986 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3987}
a69aef14 3988
bdc7f021 3989static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3990{
cd841605 3991 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3992
5a37f851 3993 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3994 data->args.bitmask = NULL;
3995 data->res.fattr = NULL;
3996 } else
3997 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3998
b029bc9b
FI		 3999 if (!data->write_done_cb)
4000 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4001 data->res.server = server;
1da177e4
LT		 4002 data->timestamp = jiffies;
4003
bdc7f021 4004 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 4005 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4006}
4007
c6cb80d0
BS		 4008static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4009{
9b206149 4010 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4011 &data->args.seq_args,
4012 &data->res.seq_res,
9b206149
TM		 4013 task))
4014 return;
4015 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4016 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4017}
4018
0b7c0153 4019static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4020{
d9afbd1b
TM		 4021 nfs4_setup_sequence(NFS_SERVER(data->inode),
4022 &data->args.seq_args,
4023 &data->res.seq_res,
4024 task);
1da177e4
LT		 4025}
4026
0b7c0153 4027static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4028{
1da177e4 4029 struct inode *inode = data->inode;
14516c3a 4030
9e33bed5 4031 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4032 rpc_restart_call_prepare(task);
788e7a89 4033 return -EAGAIN;
1da177e4 4034 }
788e7a89 4035 return 0;
1da177e4
LT		 4036}
4037
0b7c0153 4038static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4039{
4040 if (!nfs4_sequence_done(task, &data->res.seq_res))
4041 return -EAGAIN;
0b7c0153 4042 return data->commit_done_cb(task, data);
5f452431
FI		 4043}
4044
0b7c0153 4045static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4046{
788e7a89 4047 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4048
0b7c0153
FI		 4049 if (data->commit_done_cb == NULL)
4050 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4051 data->res.server = server;
bdc7f021 4052 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4053 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4054}
4055
9bc4e3ca
CL		 4056struct nfs4_renewdata {
4057 struct nfs_client *client;
4058 unsigned long timestamp;
4059};
4060
1da177e4
LT		 4061/*
4062 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4063 * standalone procedure for queueing an asynchronous RENEW.
4064 */
9bc4e3ca 4065static void nfs4_renew_release(void *calldata)
dc96aef9 4066{
9bc4e3ca
CL		 4067 struct nfs4_renewdata *data = calldata;
4068 struct nfs_client *clp = data->client;
dc96aef9 4069
0851de06
AB		 4070 if (atomic_read(&clp->cl_count) > 1)
4071 nfs4_schedule_state_renewal(clp);
4072 nfs_put_client(clp);
9bc4e3ca 4073 kfree(data);
dc96aef9
AB		 4074}
4075
9bc4e3ca 4076static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4077{
9bc4e3ca
CL		 4078 struct nfs4_renewdata *data = calldata;
4079 struct nfs_client *clp = data->client;
4080 unsigned long timestamp = data->timestamp;
1da177e4 4081
c6d01c6f 4082 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4083 if (task->tk_status < 0) {
95baa25c 4084 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4085 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4086 return;
4087 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4088 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4089 return;
4090 }
4091 nfs4_schedule_path_down_recovery(clp);
1da177e4 4092 }
452e9352 4093 do_renew_lease(clp, timestamp);
1da177e4
LT		 4094}
4095
963d8fe5
TM		 4096static const struct rpc_call_ops nfs4_renew_ops = {
4097 .rpc_call_done = nfs4_renew_done,
dc96aef9 4098 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4099};
4100
2f60ea6b 4101static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4102{
4103 struct rpc_message msg = {
4104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4105 .rpc_argp = clp,
b4454fe1 4106 .rpc_cred = cred,
1da177e4 4107 };
9bc4e3ca 4108 struct nfs4_renewdata *data;
1da177e4 4109
2f60ea6b
TM		 4110 if (renew_flags == 0)
4111 return 0;
0851de06
AB		 4112 if (!atomic_inc_not_zero(&clp->cl_count))
4113 return -EIO;
b569ad34 4114 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4115 if (data == NULL)
4116 return -ENOMEM;
4117 data->client = clp;
4118 data->timestamp = jiffies;
bc7a05ca 4119 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4120 &nfs4_renew_ops, data);
1da177e4
LT		 4121}
4122
8534d4ec 4123static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4124{
4125 struct rpc_message msg = {
4126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4127 .rpc_argp = clp,
b4454fe1 4128 .rpc_cred = cred,
1da177e4
LT		 4129 };
4130 unsigned long now = jiffies;
4131 int status;
4132
bc7a05ca 4133 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4134 if (status < 0)
4135 return status;
452e9352 4136 do_renew_lease(clp, now);
1da177e4
LT		 4137 return 0;
4138}
4139
aa1870af
BF		 4140static inline int nfs4_server_supports_acls(struct nfs_server *server)
4141{
4142 return (server->caps & NFS_CAP_ACLS)
4143 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4144 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4145}
4146
21f498c2
TM		 4147/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4148 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4149 * the stack.
4150 */
21f498c2 4151#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4152
e9e3d724
NH		 4153static int buf_to_pages_noslab(const void *buf, size_t buflen,
4154 struct page **pages, unsigned int *pgbase)
4155{
4156 struct page *newpage, **spages;
4157 int rc = 0;
4158 size_t len;
4159 spages = pages;
4160
4161 do {
21f498c2 4162 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4163 newpage = alloc_page(GFP_KERNEL);
4164
4165 if (newpage == NULL)
4166 goto unwind;
4167 memcpy(page_address(newpage), buf, len);
4168 buf += len;
4169 buflen -= len;
4170 *pages++ = newpage;
4171 rc++;
4172 } while (buflen != 0);
4173
4174 return rc;
4175
4176unwind:
4177 for(; rc > 0; rc--)
4178 __free_page(spages[rc-1]);
4179 return -ENOMEM;
4180}
4181
e50a1c2e
BF		 4182struct nfs4_cached_acl {
4183 int cached;
4184 size_t len;
3e9d4154 4185 char data[0];
e50a1c2e
BF		 4186};
4187
4188static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4189{
4190 struct nfs_inode *nfsi = NFS_I(inode);
4191
4192 spin_lock(&inode->i_lock);
4193 kfree(nfsi->nfs4_acl);
4194 nfsi->nfs4_acl = acl;
4195 spin_unlock(&inode->i_lock);
4196}
4197
4198static void nfs4_zap_acl_attr(struct inode *inode)
4199{
4200 nfs4_set_cached_acl(inode, NULL);
4201}
4202
4203static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4204{
4205 struct nfs_inode *nfsi = NFS_I(inode);
4206 struct nfs4_cached_acl *acl;
4207 int ret = -ENOENT;
4208
4209 spin_lock(&inode->i_lock);
4210 acl = nfsi->nfs4_acl;
4211 if (acl == NULL)
4212 goto out;
4213 if (buf == NULL) /* user is just asking for length */
4214 goto out_len;
4215 if (acl->cached == 0)
4216 goto out;
4217 ret = -ERANGE; /* see getxattr(2) man page */
4218 if (acl->len > buflen)
4219 goto out;
4220 memcpy(buf, acl->data, acl->len);
4221out_len:
4222 ret = acl->len;
4223out:
4224 spin_unlock(&inode->i_lock);
4225 return ret;
4226}
4227
5794d21e 4228static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4229{
4230 struct nfs4_cached_acl *acl;
b291f1b1 4231 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4232
1f1ea6c2 4233 if (buflen <= PAGE_SIZE) {
b291f1b1 4234 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4235 if (acl == NULL)
4236 goto out;
4237 acl->cached = 1;
5794d21e 4238 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4239 } else {
4240 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4241 if (acl == NULL)
4242 goto out;
4243 acl->cached = 0;
4244 }
4245 acl->len = acl_len;
4246out:
4247 nfs4_set_cached_acl(inode, acl);
4248}
4249
bf118a34
AA		 4250/*
4251 * The getxattr API returns the required buffer length when called with a
4252 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4253 * the required buf. On a NULL buf, we send a page of data to the server
4254 * guessing that the ACL request can be serviced by a page. If so, we cache
4255 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4256 * the cache. If not so, we throw away the page, and cache the required
4257 * length. The next getxattr call will then produce another round trip to
4258 * the server, this time with the input buf of the required size.
4259 */
16b4289c 4260static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4261{
bf118a34 4262 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4263 struct nfs_getaclargs args = {
4264 .fh = NFS_FH(inode),
4265 .acl_pages = pages,
4266 .acl_len = buflen,
4267 };
663c79b3
BH		 4268 struct nfs_getaclres res = {
4269 .acl_len = buflen,
4270 };
aa1870af
BF		 4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4273 .rpc_argp = &args,
663c79b3 4274 .rpc_resp = &res,
aa1870af 4275 };
21f498c2
TM		 4276 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4277 int ret = -ENOMEM, i;
aa1870af 4278
bf118a34
AA		 4279 /* As long as we're doing a round trip to the server anyway,
4280 * let's be prepared for a page of acl data. */
4281 if (npages == 0)
4282 npages = 1;
21f498c2
TM		 4283 if (npages > ARRAY_SIZE(pages))
4284 return -ERANGE;
5a006899 4285
bf118a34
AA		 4286 for (i = 0; i < npages; i++) {
4287 pages[i] = alloc_page(GFP_KERNEL);
4288 if (!pages[i])
4289 goto out_free;
e50a1c2e 4290 }
5a006899
SP		 4291
4292 /* for decoding across pages */
4293 res.acl_scratch = alloc_page(GFP_KERNEL);
4294 if (!res.acl_scratch)
4295 goto out_free;
4296
bf118a34
AA		 4297 args.acl_len = npages * PAGE_SIZE;
4298 args.acl_pgbase = 0;
5a006899 4299
de040bec 4300 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4301 __func__, buf, buflen, npages, args.acl_len);
4302 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4303 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4304 if (ret)
4305 goto out_free;
bf118a34 4306
1f1ea6c2
TM		 4307 /* Handle the case where the passed-in buffer is too short */
4308 if (res.acl_flags & NFS4_ACL_TRUNC) {
4309 /* Did the user only issue a request for the acl length? */
4310 if (buf == NULL)
4311 goto out_ok;
e50a1c2e 4312 ret = -ERANGE;
1f1ea6c2 4313 goto out_free;
e50a1c2e 4314 }
1f1ea6c2 4315 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4316 if (buf) {
4317 if (res.acl_len > buflen) {
4318 ret = -ERANGE;
4319 goto out_free;
4320 }
1f1ea6c2 4321 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4322 }
1f1ea6c2
TM		 4323out_ok:
4324 ret = res.acl_len;
e50a1c2e 4325out_free:
bf118a34
AA		 4326 for (i = 0; i < npages; i++)
4327 if (pages[i])
4328 __free_page(pages[i]);
331818f1
TM		 4329 if (res.acl_scratch)
4330 __free_page(res.acl_scratch);
aa1870af
BF		 4331 return ret;
4332}
4333
16b4289c
TM		 4334static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4335{
4336 struct nfs4_exception exception = { };
4337 ssize_t ret;
4338 do {
4339 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4340 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4341 if (ret >= 0)
4342 break;
4343 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4344 } while (exception.retry);
4345 return ret;
4346}
4347
e50a1c2e
BF		 4348static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4349{
4350 struct nfs_server *server = NFS_SERVER(inode);
4351 int ret;
4352
4353 if (!nfs4_server_supports_acls(server))
4354 return -EOPNOTSUPP;
4355 ret = nfs_revalidate_inode(server, inode);
4356 if (ret < 0)
4357 return ret;
08a22b39
AK		 4358 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4359 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4360 ret = nfs4_read_cached_acl(inode, buf, buflen);
4361 if (ret != -ENOENT)
bf118a34
AA		 4362 /* -ENOENT is returned if there is no ACL or if there is an ACL
4363 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4364 return ret;
4365 return nfs4_get_acl_uncached(inode, buf, buflen);
4366}
4367
16b4289c 4368static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4369{
4370 struct nfs_server *server = NFS_SERVER(inode);
4371 struct page *pages[NFS4ACL_MAXPAGES];
4372 struct nfs_setaclargs arg = {
4373 .fh = NFS_FH(inode),
4374 .acl_pages = pages,
4375 .acl_len = buflen,
4376 };
73c403a9 4377 struct nfs_setaclres res;
4b580ee3
BF		 4378 struct rpc_message msg = {
4379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4380 .rpc_argp = &arg,
73c403a9 4381 .rpc_resp = &res,
4b580ee3 4382 };
21f498c2 4383 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4384 int ret, i;
4b580ee3
BF		 4385
4386 if (!nfs4_server_supports_acls(server))
4387 return -EOPNOTSUPP;
21f498c2
TM		 4388 if (npages > ARRAY_SIZE(pages))
4389 return -ERANGE;
e9e3d724
NH		 4390 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4391 if (i < 0)
4392 return i;
57ec14c5 4393 nfs4_inode_return_delegation(inode);
7c513058 4394 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4395
4396 /*
4397 * Free each page after tx, so the only ref left is
4398 * held by the network stack
4399 */
4400 for (; i > 0; i--)
4401 put_page(pages[i-1]);
4402
08a22b39
AK		 4403 /*
4404 * Acl update can result in inode attribute update.
4405 * so mark the attribute cache invalid.
4406 */
4407 spin_lock(&inode->i_lock);
4408 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4409 spin_unlock(&inode->i_lock);
f41f7418
TM		 4410 nfs_access_zap_cache(inode);
4411 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4412 return ret;
4413}
4414
16b4289c
TM		 4415static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4416{
4417 struct nfs4_exception exception = { };
4418 int err;
4419 do {
c1578b76
TM		 4420 err = __nfs4_proc_set_acl(inode, buf, buflen);
4421 trace_nfs4_set_acl(inode, err);
4422 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4423 &exception);
4424 } while (exception.retry);
4425 return err;
4426}
4427
aa9c2669
DQ		 4428#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4429static int _nfs4_get_security_label(struct inode *inode, void *buf,
4430 size_t buflen)
4431{
4432 struct nfs_server *server = NFS_SERVER(inode);
4433 struct nfs_fattr fattr;
4434 struct nfs4_label label = {0, 0, buflen, buf};
4435
4436 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4437 struct nfs4_getattr_arg args = {
4438 .fh = NFS_FH(inode),
4439 .bitmask = bitmask,
4440 };
4441 struct nfs4_getattr_res res = {
4442 .fattr = &fattr,
4443 .label = &label,
4444 .server = server,
4445 };
4446 struct rpc_message msg = {
4447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4448 .rpc_argp = &args,
4449 .rpc_resp = &res,
4450 };
4451 int ret;
4452
4453 nfs_fattr_init(&fattr);
4454
4455 ret = rpc_call_sync(server->client, &msg, 0);
4456 if (ret)
4457 return ret;
4458 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4459 return -ENOENT;
4460 if (buflen < label.len)
4461 return -ERANGE;
4462 return 0;
4463}
4464
4465static int nfs4_get_security_label(struct inode *inode, void *buf,
4466 size_t buflen)
4467{
4468 struct nfs4_exception exception = { };
4469 int err;
4470
4471 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4472 return -EOPNOTSUPP;
4473
4474 do {
c1578b76
TM		 4475 err = _nfs4_get_security_label(inode, buf, buflen);
4476 trace_nfs4_get_security_label(inode, err);
4477 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4478 &exception);
4479 } while (exception.retry);
4480 return err;
4481}
4482
4483static int _nfs4_do_set_security_label(struct inode *inode,
4484 struct nfs4_label *ilabel,
4485 struct nfs_fattr *fattr,
4486 struct nfs4_label *olabel)
4487{
4488
4489 struct iattr sattr = {0};
4490 struct nfs_server *server = NFS_SERVER(inode);
4491 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4492 struct nfs_setattrargs args = {
4493 .fh = NFS_FH(inode),
4494 .iap = &sattr,
4495 .server = server,
4496 .bitmask = bitmask,
4497 .label = ilabel,
4498 };
4499 struct nfs_setattrres res = {
4500 .fattr = fattr,
4501 .label = olabel,
4502 .server = server,
4503 };
4504 struct rpc_message msg = {
4505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4506 .rpc_argp = &args,
4507 .rpc_resp = &res,
4508 };
4509 int status;
4510
4511 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4512
4513 status = rpc_call_sync(server->client, &msg, 0);
4514 if (status)
4515 dprintk("%s failed: %d\n", __func__, status);
4516
4517 return status;
4518}
4519
4520static int nfs4_do_set_security_label(struct inode *inode,
4521 struct nfs4_label *ilabel,
4522 struct nfs_fattr *fattr,
4523 struct nfs4_label *olabel)
4524{
4525 struct nfs4_exception exception = { };
4526 int err;
4527
4528 do {
c1578b76
TM		 4529 err = _nfs4_do_set_security_label(inode, ilabel,
4530 fattr, olabel);
4531 trace_nfs4_set_security_label(inode, err);
4532 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4533 &exception);
4534 } while (exception.retry);
4535 return err;
4536}
4537
4538static int
4539nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4540{
4541 struct nfs4_label ilabel, *olabel = NULL;
4542 struct nfs_fattr fattr;
4543 struct rpc_cred *cred;
4544 struct inode *inode = dentry->d_inode;
4545 int status;
4546
4547 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4548 return -EOPNOTSUPP;
4549
4550 nfs_fattr_init(&fattr);
4551
4552 ilabel.pi = 0;
4553 ilabel.lfs = 0;
4554 ilabel.label = (char *)buf;
4555 ilabel.len = buflen;
4556
4557 cred = rpc_lookup_cred();
4558 if (IS_ERR(cred))
4559 return PTR_ERR(cred);
4560
4561 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4562 if (IS_ERR(olabel)) {
4563 status = -PTR_ERR(olabel);
4564 goto out;
4565 }
4566
4567 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4568 if (status == 0)
4569 nfs_setsecurity(inode, &fattr, olabel);
4570
4571 nfs4_label_free(olabel);
4572out:
4573 put_rpccred(cred);
4574 return status;
4575}
4576#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4577
4578
1da177e4 4579static int
aa5190d0 4580nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4581{
aa5190d0
TM		 4582 struct nfs_client *clp = server->nfs_client;
4583
4584 if (task->tk_status >= 0)
1da177e4
LT		 4585 return 0;
4586 switch(task->tk_status) {
a1d0b5ee 4587 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4588 case -NFS4ERR_ADMIN_REVOKED:
4589 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4590 if (state == NULL)
4591 break;
4592 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4593 case -NFS4ERR_OPENMODE:
4594 if (state == NULL)
4595 break;
5d422301
TM		 4596 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4597 goto stateid_invalid;
0400a6b0 4598 goto wait_on_recovery;
0ced63d1 4599 case -NFS4ERR_EXPIRED:
5d422301
TM		 4600 if (state != NULL) {
4601 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4602 goto stateid_invalid;
4603 }
1da177e4 4604 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4605 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4606 nfs4_schedule_lease_recovery(clp);
4607 goto wait_on_recovery;
4745e315
AA		 4608#if defined(CONFIG_NFS_V4_1)
4609 case -NFS4ERR_BADSESSION:
4610 case -NFS4ERR_BADSLOT:
4611 case -NFS4ERR_BAD_HIGH_SLOT:
4612 case -NFS4ERR_DEADSESSION:
4613 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4614 case -NFS4ERR_SEQ_FALSE_RETRY:
4615 case -NFS4ERR_SEQ_MISORDERED:
4616 dprintk("%s ERROR %d, Reset session\n", __func__,
4617 task->tk_status);
9f594791 4618 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4619 task->tk_status = 0;
4620 return -EAGAIN;
4621#endif /* CONFIG_NFS_V4_1 */
1da177e4 4622 case -NFS4ERR_DELAY:
aa5190d0 4623 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4624 case -NFS4ERR_GRACE:
1da177e4
LT		 4625 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4626 task->tk_status = 0;
4627 return -EAGAIN;
a8a4ae3a 4628 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4629 case -NFS4ERR_OLD_STATEID:
4630 task->tk_status = 0;
4631 return -EAGAIN;
4632 }
4633 task->tk_status = nfs4_map_errors(task->tk_status);
4634 return 0;
5d422301
TM		 4635stateid_invalid:
4636 task->tk_status = -EIO;
4637 return 0;
0400a6b0 4638wait_on_recovery:
a2c0b9e2 4639 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4640 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4641 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4642 task->tk_status = 0;
4643 return -EAGAIN;
1da177e4
LT		 4644}
4645
f092075d
CL		 4646static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4647 nfs4_verifier *bootverf)
cd93710e
CL		 4648{
4649 __be32 verf[2];
4650
2c820d9a
CL		 4651 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4652 /* An impossible timestamp guarantees this value
4653 * will never match a generated boot time. */
4654 verf[0] = 0;
17f26b12 4655 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4656 } else {
f092075d 4657 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4658 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4659 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4660 }
cd93710e
CL		 4661 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4662}
4663
e984a55a
CL		 4664static unsigned int
4665nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4666 char *buf, size_t len)
4667{
4668 unsigned int result;
4669
4670 rcu_read_lock();
4671 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4672 clp->cl_ipaddr,
4673 rpc_peeraddr2str(clp->cl_rpcclient,
4674 RPC_DISPLAY_ADDR),
4675 rpc_peeraddr2str(clp->cl_rpcclient,
4676 RPC_DISPLAY_PROTO));
4677 rcu_read_unlock();
4678 return result;
4679}
4680
4681static unsigned int
4682nfs4_init_uniform_client_string(const struct nfs_client *clp,
4683 char *buf, size_t len)
4684{
55b59293 4685 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4686
4687 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4688 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4689 clp->rpc_ops->version,
4690 clp->cl_minorversion,
4691 nfs4_client_id_uniquifier,
4692 nodename);
e984a55a
CL		 4693 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4694 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4695 nodename);
e984a55a
CL		 4696}
4697
6bbb4ae8
CL		 4698/**
4699 * nfs4_proc_setclientid - Negotiate client ID
4700 * @clp: state data structure
4701 * @program: RPC program for NFSv4 callback service
4702 * @port: IP port number for NFS4 callback service
4703 * @cred: RPC credential to use for this call
4704 * @res: where to place the result
4705 *
4706 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4707 */
bb8b27e5
TM		 4708int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4709 unsigned short port, struct rpc_cred *cred,
4710 struct nfs4_setclientid_res *res)
1da177e4
LT		 4711{
4712 nfs4_verifier sc_verifier;
4713 struct nfs4_setclientid setclientid = {
4714 .sc_verifier = &sc_verifier,
4715 .sc_prog = program,
f4eecd5d 4716 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4717 };
4718 struct rpc_message msg = {
4719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4720 .rpc_argp = &setclientid,
bb8b27e5 4721 .rpc_resp = res,
286d7d6a 4722 .rpc_cred = cred,
1da177e4 4723 };
6bbb4ae8 4724 int status;
1da177e4 4725
de734831 4726 /* nfs_client_id4 */
f092075d 4727 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4728 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4729 setclientid.sc_name_len =
4730 nfs4_init_uniform_client_string(clp,
4731 setclientid.sc_name,
4732 sizeof(setclientid.sc_name));
4733 else
4734 setclientid.sc_name_len =
4735 nfs4_init_nonuniform_client_string(clp,
4736 setclientid.sc_name,
4737 sizeof(setclientid.sc_name));
de734831 4738 /* cb_client4 */
e984a55a 4739 rcu_read_lock();
de734831 4740 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4741 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4742 rpc_peeraddr2str(clp->cl_rpcclient,
4743 RPC_DISPLAY_NETID));
de734831
CL		 4744 rcu_read_unlock();
4745 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4746 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4747 clp->cl_ipaddr, port >> 8, port & 255);
4748
6bbb4ae8
CL		 4749 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4750 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4751 setclientid.sc_name_len, setclientid.sc_name);
4752 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4753 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4754 dprintk("NFS reply setclientid: %d\n", status);
4755 return status;
1da177e4
LT		 4756}
4757
6bbb4ae8
CL		 4758/**
4759 * nfs4_proc_setclientid_confirm - Confirm client ID
4760 * @clp: state data structure
4761 * @res: result of a previous SETCLIENTID
4762 * @cred: RPC credential to use for this call
4763 *
4764 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4765 */
fd954ae1 4766int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4767 struct nfs4_setclientid_res *arg,
4768 struct rpc_cred *cred)
1da177e4 4769{
1da177e4
LT		 4770 struct rpc_message msg = {
4771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4772 .rpc_argp = arg,
286d7d6a 4773 .rpc_cred = cred,
1da177e4 4774 };
1da177e4
LT		 4775 int status;
4776
6bbb4ae8
CL		 4777 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4778 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4779 clp->cl_clientid);
1bd714f2 4780 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4781 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4782 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4783 return status;
4784}
4785
fe650407
TM		 4786struct nfs4_delegreturndata {
4787 struct nfs4_delegreturnargs args;
fa178f29 4788 struct nfs4_delegreturnres res;
fe650407
TM		 4789 struct nfs_fh fh;
4790 nfs4_stateid stateid;
26e976a8 4791 unsigned long timestamp;
fa178f29 4792 struct nfs_fattr fattr;
fe650407
TM		 4793 int rpc_status;
4794};
4795
fe650407
TM		 4796static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4797{
4798 struct nfs4_delegreturndata *data = calldata;
938e1010 4799
14516c3a
TM		 4800 if (!nfs4_sequence_done(task, &data->res.seq_res))
4801 return;
938e1010 4802
79708861
RL		 4803 switch (task->tk_status) {
4804 case -NFS4ERR_STALE_STATEID:
4805 case -NFS4ERR_EXPIRED:
4806 case 0:
fa178f29 4807 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4808 break;
4809 default:
4810 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4811 -EAGAIN) {
d00c5d43 4812 rpc_restart_call_prepare(task);
79708861
RL		 4813 return;
4814 }
4815 }
4816 data->rpc_status = task->tk_status;
fe650407
TM		 4817}
4818
4819static void nfs4_delegreturn_release(void *calldata)
4820{
fe650407
TM		 4821 kfree(calldata);
4822}
4823
938e1010
AA		 4824#if defined(CONFIG_NFS_V4_1)
4825static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4826{
4827 struct nfs4_delegreturndata *d_data;
4828
4829 d_data = (struct nfs4_delegreturndata *)data;
4830
d9afbd1b
TM		 4831 nfs4_setup_sequence(d_data->res.server,
4832 &d_data->args.seq_args,
4833 &d_data->res.seq_res,
4834 task);
938e1010
AA		 4835}
4836#endif /* CONFIG_NFS_V4_1 */
4837
c8d149f3 4838static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4839#if defined(CONFIG_NFS_V4_1)
4840 .rpc_call_prepare = nfs4_delegreturn_prepare,
4841#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4842 .rpc_call_done = nfs4_delegreturn_done,
4843 .rpc_release = nfs4_delegreturn_release,
4844};
4845
e6f81075 4846static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4847{
4848 struct nfs4_delegreturndata *data;
fa178f29 4849 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4850 struct rpc_task *task;
5138fde0
TM		 4851 struct rpc_message msg = {
4852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4853 .rpc_cred = cred,
4854 };
c970aa85
TM		 4855 struct rpc_task_setup task_setup_data = {
4856 .rpc_client = server->client,
5138fde0 4857 .rpc_message = &msg,
c970aa85
TM		 4858 .callback_ops = &nfs4_delegreturn_ops,
4859 .flags = RPC_TASK_ASYNC,
4860 };
e6f81075 4861 int status = 0;
fe650407 4862
8535b2be 4863 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4864 if (data == NULL)
4865 return -ENOMEM;
9d12b216 4866 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4867 data->args.fhandle = &data->fh;
4868 data->args.stateid = &data->stateid;
9e907fec 4869 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4870 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4871 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4872 data->res.fattr = &data->fattr;
4873 data->res.server = server;
5138fde0 4874 nfs_fattr_init(data->res.fattr);
26e976a8 4875 data->timestamp = jiffies;
fe650407
TM		 4876 data->rpc_status = 0;
4877
c970aa85 4878 task_setup_data.callback_data = data;
1174dd1f
TM		 4879 msg.rpc_argp = &data->args;
4880 msg.rpc_resp = &data->res;
c970aa85 4881 task = rpc_run_task(&task_setup_data);
7a1218a2 4882 if (IS_ERR(task))
fe650407 4883 return PTR_ERR(task);
e6f81075
TM		 4884 if (!issync)
4885 goto out;
fe650407 4886 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4887 if (status != 0)
4888 goto out;
4889 status = data->rpc_status;
e144cbcc
TM		 4890 if (status == 0)
4891 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4892 else
4893 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4894out:
e6b3c4db 4895 rpc_put_task(task);
fe650407 4896 return status;
1da177e4
LT		 4897}
4898
e6f81075 4899int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4900{
4901 struct nfs_server *server = NFS_SERVER(inode);
4902 struct nfs4_exception exception = { };
4903 int err;
4904 do {
e6f81075 4905 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4906 switch (err) {
4907 case -NFS4ERR_STALE_STATEID:
4908 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4909 case 0:
4910 return 0;
4911 }
4912 err = nfs4_handle_exception(server, err, &exception);
4913 } while (exception.retry);
4914 return err;
4915}
4916
4917#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4918#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4919
4920/*
4921 * sleep, with exponential backoff, and retry the LOCK operation.
4922 */
4923static unsigned long
4924nfs4_set_lock_task_retry(unsigned long timeout)
4925{
416ad3c9 4926 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4927 timeout <<= 1;
4928 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4929 return NFS4_LOCK_MAXTIMEOUT;
4930 return timeout;
4931}
4932
1da177e4
LT		 4933static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4934{
4935 struct inode *inode = state->inode;
4936 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4937 struct nfs_client *clp = server->nfs_client;
911d1aaf 4938 struct nfs_lockt_args arg = {
1da177e4 4939 .fh = NFS_FH(inode),
911d1aaf 4940 .fl = request,
1da177e4 4941 };
911d1aaf
TM		 4942 struct nfs_lockt_res res = {
4943 .denied = request,
1da177e4
LT		 4944 };
4945 struct rpc_message msg = {
4946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4947 .rpc_argp = &arg,
4948 .rpc_resp = &res,
4949 .rpc_cred = state->owner->so_cred,
4950 };
1da177e4
LT		 4951 struct nfs4_lock_state *lsp;
4952 int status;
4953
911d1aaf 4954 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4955 status = nfs4_set_lock_state(state, request);
4956 if (status != 0)
4957 goto out;
4958 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4959 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4960 arg.lock_owner.s_dev = server->s_dev;
7c513058 4961 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4962 switch (status) {
4963 case 0:
4964 request->fl_type = F_UNLCK;
4965 break;
4966 case -NFS4ERR_DENIED:
4967 status = 0;
1da177e4 4968 }
70cc6487 4969 request->fl_ops->fl_release_private(request);
8d0a8a9d 4970out:
1da177e4
LT		 4971 return status;
4972}
4973
4974static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4975{
4976 struct nfs4_exception exception = { };
4977 int err;
4978
4979 do {
d1b748a5
TM		 4980 err = _nfs4_proc_getlk(state, cmd, request);
4981 trace_nfs4_get_lock(request, state, cmd, err);
4982 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 4983 &exception);
4984 } while (exception.retry);
4985 return err;
4986}
4987
4988static int do_vfs_lock(struct file *file, struct file_lock *fl)
4989{
4990 int res = 0;
4991 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4992 case FL_POSIX:
4993 res = posix_lock_file_wait(file, fl);
4994 break;
4995 case FL_FLOCK:
4996 res = flock_lock_file_wait(file, fl);
4997 break;
4998 default:
4999 BUG();
5000 }
1da177e4
LT		 5001 return res;
5002}
5003
faf5f49c 5004struct nfs4_unlockdata {
911d1aaf
TM		 5005 struct nfs_locku_args arg;
5006 struct nfs_locku_res res;
faf5f49c
TM		 5007 struct nfs4_lock_state *lsp;
5008 struct nfs_open_context *ctx;
911d1aaf
TM		 5009 struct file_lock fl;
5010 const struct nfs_server *server;
26e976a8 5011 unsigned long timestamp;
faf5f49c
TM		 5012};
5013
911d1aaf
TM		 5014static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5015 struct nfs_open_context *ctx,
5016 struct nfs4_lock_state *lsp,
5017 struct nfs_seqid *seqid)
5018{
5019 struct nfs4_unlockdata *p;
5020 struct inode *inode = lsp->ls_state->inode;
5021
8535b2be 5022 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5023 if (p == NULL)
5024 return NULL;
5025 p->arg.fh = NFS_FH(inode);
5026 p->arg.fl = &p->fl;
5027 p->arg.seqid = seqid;
c1d51931 5028 p->res.seqid = seqid;
911d1aaf
TM		 5029 p->arg.stateid = &lsp->ls_stateid;
5030 p->lsp = lsp;
5031 atomic_inc(&lsp->ls_count);
5032 /* Ensure we don't close file until we're done freeing locks! */
5033 p->ctx = get_nfs_open_context(ctx);
5034 memcpy(&p->fl, fl, sizeof(p->fl));
5035 p->server = NFS_SERVER(inode);
5036 return p;
5037}
5038
06f814a3 5039static void nfs4_locku_release_calldata(void *data)
faf5f49c 5040{
963d8fe5 5041 struct nfs4_unlockdata *calldata = data;
911d1aaf 5042 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5043 nfs4_put_lock_state(calldata->lsp);
5044 put_nfs_open_context(calldata->ctx);
5045 kfree(calldata);
faf5f49c
TM		 5046}
5047
963d8fe5 5048static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5049{
963d8fe5 5050 struct nfs4_unlockdata *calldata = data;
faf5f49c 5051
14516c3a
TM		 5052 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5053 return;
faf5f49c
TM		 5054 switch (task->tk_status) {
5055 case 0:
f597c537
TM		 5056 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5057 &calldata->res.stateid);
26e976a8 5058 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5059 break;
9e33bed5
TM		 5060 case -NFS4ERR_BAD_STATEID:
5061 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5062 case -NFS4ERR_STALE_STATEID:
5063 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5064 break;
5065 default:
9e33bed5 5066 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5067 rpc_restart_call_prepare(task);
faf5f49c 5068 }
2b1bc308 5069 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5070}
5071
4ce70ada 5072static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5073{
4ce70ada 5074 struct nfs4_unlockdata *calldata = data;
faf5f49c 5075
911d1aaf 5076 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5077 goto out_wait;
795a88c9 5078 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5079 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5080 goto out_no_action;
faf5f49c 5081 }
26e976a8 5082 calldata->timestamp = jiffies;
035168ab 5083 if (nfs4_setup_sequence(calldata->server,
a893693c 5084 &calldata->arg.seq_args,
2240a9e2
TM		 5085 &calldata->res.seq_res,
5086 task) != 0)
5087 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5088 return;
5089out_no_action:
5090 task->tk_action = NULL;
5091out_wait:
5092 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5093}
5094
963d8fe5 5095static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5096 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5097 .rpc_call_done = nfs4_locku_done,
06f814a3 5098 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5099};
5100
a5d16a4d
TM		 5101static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5102 struct nfs_open_context *ctx,
5103 struct nfs4_lock_state *lsp,
5104 struct nfs_seqid *seqid)
5105{
5106 struct nfs4_unlockdata *data;
5138fde0
TM		 5107 struct rpc_message msg = {
5108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5109 .rpc_cred = ctx->cred,
5110 };
c970aa85
TM		 5111 struct rpc_task_setup task_setup_data = {
5112 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5113 .rpc_message = &msg,
c970aa85 5114 .callback_ops = &nfs4_locku_ops,
101070ca 5115 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5116 .flags = RPC_TASK_ASYNC,
5117 };
a5d16a4d 5118
137d6aca
FF		 5119 /* Ensure this is an unlock - when canceling a lock, the
5120 * canceled lock is passed in, and it won't be an unlock.
5121 */
5122 fl->fl_type = F_UNLCK;
5123
a5d16a4d
TM		 5124 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5125 if (data == NULL) {
5126 nfs_free_seqid(seqid);
5127 return ERR_PTR(-ENOMEM);
5128 }
5129
9d12b216 5130 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5131 msg.rpc_argp = &data->arg;
5132 msg.rpc_resp = &data->res;
c970aa85
TM		 5133 task_setup_data.callback_data = data;
5134 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5135}
5136
faf5f49c
TM		 5137static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5138{
65b62a29
TM		 5139 struct inode *inode = state->inode;
5140 struct nfs4_state_owner *sp = state->owner;
5141 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5142 struct nfs_seqid *seqid;
1da177e4 5143 struct nfs4_lock_state *lsp;
06f814a3
TM		 5144 struct rpc_task *task;
5145 int status = 0;
536ff0f8 5146 unsigned char fl_flags = request->fl_flags;
faf5f49c 5147
8d0a8a9d 5148 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5149 /* Unlock _before_ we do the RPC call */
5150 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5151 /* Exclude nfs_delegation_claim_locks() */
5152 mutex_lock(&sp->so_delegreturn_mutex);
5153 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5154 down_read(&nfsi->rwsem);
5155 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5156 up_read(&nfsi->rwsem);
65b62a29 5157 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5158 goto out;
19e03c57
TM		 5159 }
5160 up_read(&nfsi->rwsem);
65b62a29 5161 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5162 if (status != 0)
9b073574
TM		 5163 goto out;
5164 /* Is this a delegated lock? */
8d0a8a9d 5165 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5166 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5167 goto out;
8535b2be 5168 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5169 status = -ENOMEM;
911d1aaf 5170 if (seqid == NULL)
9b073574 5171 goto out;
cd3758e3 5172 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5173 status = PTR_ERR(task);
5174 if (IS_ERR(task))
9b073574 5175 goto out;
a5d16a4d 5176 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5177 rpc_put_task(task);
9b073574 5178out:
536ff0f8 5179 request->fl_flags = fl_flags;
d1b748a5 5180 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5181 return status;
5182}
5183
a5d16a4d
TM		 5184struct nfs4_lockdata {
5185 struct nfs_lock_args arg;
5186 struct nfs_lock_res res;
5187 struct nfs4_lock_state *lsp;
5188 struct nfs_open_context *ctx;
5189 struct file_lock fl;
26e976a8 5190 unsigned long timestamp;
a5d16a4d
TM		 5191 int rpc_status;
5192 int cancelled;
66179efe 5193 struct nfs_server *server;
a5d16a4d
TM		 5194};
5195
5196static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5197 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5198 gfp_t gfp_mask)
1da177e4 5199{
a5d16a4d
TM		 5200 struct nfs4_lockdata *p;
5201 struct inode *inode = lsp->ls_state->inode;
1da177e4 5202 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5203
8535b2be 5204 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5205 if (p == NULL)
5206 return NULL;
5207
5208 p->arg.fh = NFS_FH(inode);
5209 p->arg.fl = &p->fl;
8535b2be 5210 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5211 if (p->arg.open_seqid == NULL)
5212 goto out_free;
8535b2be 5213 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5214 if (p->arg.lock_seqid == NULL)
2f74c0a0 5215 goto out_free_seqid;
a5d16a4d 5216 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5217 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5218 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5219 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5220 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5221 p->lsp = lsp;
66179efe 5222 p->server = server;
a5d16a4d
TM		 5223 atomic_inc(&lsp->ls_count);
5224 p->ctx = get_nfs_open_context(ctx);
5225 memcpy(&p->fl, fl, sizeof(p->fl));
5226 return p;
2f74c0a0
TM		 5227out_free_seqid:
5228 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5229out_free:
5230 kfree(p);
5231 return NULL;
5232}
5233
5234static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5235{
5236 struct nfs4_lockdata *data = calldata;
5237 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5238
3110ff80 5239 dprintk("%s: begin!\n", __func__);
2f74c0a0 5240 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5241 goto out_wait;
a5d16a4d
TM		 5242 /* Do we need to do an open_to_lock_owner? */
5243 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5244 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5245 goto out_release_lock_seqid;
8fe72bac 5246 }
8e472f33 5247 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5248 data->arg.new_lock_owner = 1;
c1d51931 5249 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5250 } else
5251 data->arg.new_lock_owner = 0;
5d422301
TM		 5252 if (!nfs4_valid_open_stateid(state)) {
5253 data->rpc_status = -EBADF;
5254 task->tk_action = NULL;
5255 goto out_release_open_seqid;
5256 }
26e976a8 5257 data->timestamp = jiffies;
035168ab
TM		 5258 if (nfs4_setup_sequence(data->server,
5259 &data->arg.seq_args,
2240a9e2 5260 &data->res.seq_res,
d9afbd1b 5261 task) == 0)
66179efe 5262 return;
5d422301 5263out_release_open_seqid:
2240a9e2
TM		 5264 nfs_release_seqid(data->arg.open_seqid);
5265out_release_lock_seqid:
5266 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5267out_wait:
5268 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5269 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5270}
5271
a5d16a4d
TM		 5272static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5273{
5274 struct nfs4_lockdata *data = calldata;
5275
3110ff80 5276 dprintk("%s: begin!\n", __func__);
a5d16a4d 5277
14516c3a
TM		 5278 if (!nfs4_sequence_done(task, &data->res.seq_res))
5279 return;
66179efe 5280
a5d16a4d 5281 data->rpc_status = task->tk_status;
a5d16a4d 5282 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5283 if (data->rpc_status == 0)
5284 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5285 else
5286 goto out;
5287 }
5288 if (data->rpc_status == 0) {
f597c537 5289 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5290 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5291 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5292 }
a5d16a4d 5293out:
3110ff80 5294 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5295}
5296
5297static void nfs4_lock_release(void *calldata)
5298{
5299 struct nfs4_lockdata *data = calldata;
5300
3110ff80 5301 dprintk("%s: begin!\n", __func__);
2f74c0a0 5302 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5303 if (data->cancelled != 0) {
5304 struct rpc_task *task;
5305 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5306 data->arg.lock_seqid);
5307 if (!IS_ERR(task))
bf294b41 5308 rpc_put_task_async(task);
3110ff80 5309 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5310 } else
5311 nfs_free_seqid(data->arg.lock_seqid);
5312 nfs4_put_lock_state(data->lsp);
5313 put_nfs_open_context(data->ctx);
5314 kfree(data);
3110ff80 5315 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5316}
5317
5318static const struct rpc_call_ops nfs4_lock_ops = {
5319 .rpc_call_prepare = nfs4_lock_prepare,
5320 .rpc_call_done = nfs4_lock_done,
5321 .rpc_release = nfs4_lock_release,
5322};
5323
2bee72a6
TM		 5324static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5325{
2bee72a6
TM		 5326 switch (error) {
5327 case -NFS4ERR_ADMIN_REVOKED:
5328 case -NFS4ERR_BAD_STATEID:
ecac799a 5329 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5330 if (new_lock_owner != 0 ||
795a88c9 5331 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5332 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5333 break;
5334 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5335 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5336 case -NFS4ERR_EXPIRED:
5337 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5338 };
5339}
5340
afe6c27c 5341static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5342{
5343 struct nfs4_lockdata *data;
5344 struct rpc_task *task;
5138fde0
TM		 5345 struct rpc_message msg = {
5346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5347 .rpc_cred = state->owner->so_cred,
5348 };
c970aa85
TM		 5349 struct rpc_task_setup task_setup_data = {
5350 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5351 .rpc_message = &msg,
c970aa85 5352 .callback_ops = &nfs4_lock_ops,
101070ca 5353 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5354 .flags = RPC_TASK_ASYNC,
5355 };
a5d16a4d
TM		 5356 int ret;
5357
3110ff80 5358 dprintk("%s: begin!\n", __func__);
cd3758e3 5359 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5360 fl->fl_u.nfs4_fl.owner,
5361 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5362 if (data == NULL)
5363 return -ENOMEM;
5364 if (IS_SETLKW(cmd))
5365 data->arg.block = 1;
9d12b216 5366 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5367 msg.rpc_argp = &data->arg;
5368 msg.rpc_resp = &data->res;
c970aa85 5369 task_setup_data.callback_data = data;
8fe72bac
TM		 5370 if (recovery_type > NFS_LOCK_NEW) {
5371 if (recovery_type == NFS_LOCK_RECLAIM)
5372 data->arg.reclaim = NFS_LOCK_RECLAIM;
5373 nfs4_set_sequence_privileged(&data->arg.seq_args);
5374 }
c970aa85 5375 task = rpc_run_task(&task_setup_data);
7a1218a2 5376 if (IS_ERR(task))
a5d16a4d 5377 return PTR_ERR(task);
a5d16a4d
TM		 5378 ret = nfs4_wait_for_completion_rpc_task(task);
5379 if (ret == 0) {
5380 ret = data->rpc_status;
2bee72a6
TM		 5381 if (ret)
5382 nfs4_handle_setlk_error(data->server, data->lsp,
5383 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5384 } else
5385 data->cancelled = 1;
e6b3c4db 5386 rpc_put_task(task);
3110ff80 5387 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5388 return ret;
1da177e4
LT		 5389}
5390
5391static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5392{
202b50dc 5393 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5394 struct nfs4_exception exception = {
5395 .inode = state->inode,
5396 };
202b50dc
TM		 5397 int err;
5398
5399 do {
42a2d13e
TM		 5400 /* Cache the lock if possible... */
5401 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5402 return 0;
afe6c27c 5403 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5404 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5405 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5406 break;
5407 nfs4_handle_exception(server, err, &exception);
5408 } while (exception.retry);
5409 return err;
1da177e4
LT		 5410}
5411
5412static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5413{
202b50dc 5414 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5415 struct nfs4_exception exception = {
5416 .inode = state->inode,
5417 };
202b50dc
TM		 5418 int err;
5419
6bfc93ef
TM		 5420 err = nfs4_set_lock_state(state, request);
5421 if (err != 0)
5422 return err;
202b50dc 5423 do {
42a2d13e
TM		 5424 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5425 return 0;
afe6c27c 5426 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5427 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5428 switch (err) {
5429 default:
5430 goto out;
5431 case -NFS4ERR_GRACE:
5432 case -NFS4ERR_DELAY:
5433 nfs4_handle_exception(server, err, &exception);
5434 err = 0;
5435 }
202b50dc 5436 } while (exception.retry);
a9ed2e25 5437out:
202b50dc 5438 return err;
1da177e4
LT		 5439}
5440
f062eb6c 5441#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5442/**
5443 * nfs41_check_expired_locks - possibly free a lock stateid
5444 *
5445 * @state: NFSv4 state for an inode
5446 *
5447 * Returns NFS_OK if recovery for this stateid is now finished.
5448 * Otherwise a negative NFS4ERR value is returned.
5449 */
b01dd1d8 5450static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5451{
eb64cf96 5452 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5453 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5454 struct nfs_server *server = NFS_SERVER(state->inode);
5455
b01dd1d8 5456 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5457 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5458 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5459
5460 status = nfs41_test_stateid(server,
5461 &lsp->ls_stateid,
5462 cred);
b01dd1d8 5463 if (status != NFS_OK) {
3e60ffdd
CL		 5464 /* Free the stateid unless the server
5465 * informs us the stateid is unrecognized. */
89af2739
CL		 5466 if (status != -NFS4ERR_BAD_STATEID)
5467 nfs41_free_stateid(server,
ab7cb0df
TM		 5468 &lsp->ls_stateid,
5469 cred);
795a88c9 5470 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5471 ret = status;
5472 }
5473 }
5474 };
5475
5476 return ret;
5477}
5478
5479static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5480{
5481 int status = NFS_OK;
5482
5483 if (test_bit(LK_STATE_IN_USE, &state->flags))
5484 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5485 if (status != NFS_OK)
5486 status = nfs4_lock_expired(state, request);
5487 return status;
f062eb6c
BS		 5488}
5489#endif
5490
1da177e4
LT		 5491static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5492{
9a99af49 5493 struct nfs4_state_owner *sp = state->owner;
19e03c57 5494 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5495 unsigned char fl_flags = request->fl_flags;
9a99af49 5496 unsigned int seq;
8e469ebd 5497 int status = -ENOLCK;
1da177e4 5498
8e469ebd
TM		 5499 if ((fl_flags & FL_POSIX) &&
5500 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5501 goto out;
6bfc93ef 5502 /* Is this a delegated open? */
6bfc93ef
TM		 5503 status = nfs4_set_lock_state(state, request);
5504 if (status != 0)
5505 goto out;
01c3b861
TM		 5506 request->fl_flags |= FL_ACCESS;
5507 status = do_vfs_lock(request->fl_file, request);
5508 if (status < 0)
5509 goto out;
19e03c57 5510 down_read(&nfsi->rwsem);
01c3b861 5511 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5512 /* Yes: cache locks! */
01c3b861 5513 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5514 request->fl_flags = fl_flags & ~FL_SLEEP;
5515 status = do_vfs_lock(request->fl_file, request);
5516 goto out_unlock;
01c3b861 5517 }
9a99af49
TM		 5518 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5519 up_read(&nfsi->rwsem);
afe6c27c 5520 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5521 if (status != 0)
9a99af49
TM		 5522 goto out;
5523 down_read(&nfsi->rwsem);
5524 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5525 status = -NFS4ERR_DELAY;
01c3b861 5526 goto out_unlock;
9a99af49 5527 }
6bfc93ef 5528 /* Note: we always want to sleep here! */
01c3b861 5529 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5530 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5531 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5532 "manager!\n", __func__);
01c3b861 5533out_unlock:
19e03c57 5534 up_read(&nfsi->rwsem);
01c3b861
TM		 5535out:
5536 request->fl_flags = fl_flags;
1da177e4
LT		 5537 return status;
5538}
5539
5540static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5541{
a1d0b5ee
TM		 5542 struct nfs4_exception exception = {
5543 .state = state,
05ffe24f 5544 .inode = state->inode,
a1d0b5ee 5545 };
1da177e4
LT		 5546 int err;
5547
5548 do {
965b5d67 5549 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5550 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5551 if (err == -NFS4ERR_DENIED)
5552 err = -EAGAIN;
1da177e4 5553 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5554 err, &exception);
1da177e4
LT		 5555 } while (exception.retry);
5556 return err;
5557}
5558
5559static int
5560nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5561{
5562 struct nfs_open_context *ctx;
5563 struct nfs4_state *state;
5564 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5565 int status;
5566
5567 /* verify open state */
cd3758e3 5568 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5569 state = ctx->state;
5570
5571 if (request->fl_start < 0 || request->fl_end < 0)
5572 return -EINVAL;
5573
d953126a
TM		 5574 if (IS_GETLK(cmd)) {
5575 if (state != NULL)
5576 return nfs4_proc_getlk(state, F_GETLK, request);
5577 return 0;
5578 }
1da177e4
LT		 5579
5580 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5581 return -EINVAL;
5582
d953126a
TM		 5583 if (request->fl_type == F_UNLCK) {
5584 if (state != NULL)
5585 return nfs4_proc_unlck(state, cmd, request);
5586 return 0;
5587 }
1da177e4 5588
d953126a
TM		 5589 if (state == NULL)
5590 return -ENOLCK;
55725513
TM		 5591 /*
5592 * Don't rely on the VFS having checked the file open mode,
5593 * since it won't do this for flock() locks.
5594 */
f44106e2 5595 switch (request->fl_type) {
55725513
TM		 5596 case F_RDLCK:
5597 if (!(filp->f_mode & FMODE_READ))
5598 return -EBADF;
5599 break;
5600 case F_WRLCK:
5601 if (!(filp->f_mode & FMODE_WRITE))
5602 return -EBADF;
5603 }
5604
1da177e4
LT		 5605 do {
5606 status = nfs4_proc_setlk(state, cmd, request);
5607 if ((status != -EAGAIN) || IS_SETLK(cmd))
5608 break;
5609 timeout = nfs4_set_lock_task_retry(timeout);
5610 status = -ERESTARTSYS;
5611 if (signalled())
5612 break;
5613 } while(status < 0);
1da177e4
LT		 5614 return status;
5615}
5616
db4f2e63 5617int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5618{
5619 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5620 int err;
5621
5622 err = nfs4_set_lock_state(state, fl);
5623 if (err != 0)
db4f2e63 5624 return err;
4a706fa0 5625 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5626 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5627}
6b3b5496 5628
cf470c3e
TM		 5629struct nfs_release_lockowner_data {
5630 struct nfs4_lock_state *lsp;
5ae67c4f 5631 struct nfs_server *server;
cf470c3e
TM		 5632 struct nfs_release_lockowner_args args;
5633};
5634
d3c7b7cc
TM		 5635static void nfs4_release_lockowner_release(void *calldata)
5636{
cf470c3e 5637 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5638 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5639 kfree(calldata);
5640}
5641
17280175 5642static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5643 .rpc_release = nfs4_release_lockowner_release,
5644};
5645
c8b2d0bf 5646static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5647{
cf470c3e 5648 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5649 struct rpc_message msg = {
5650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5651 };
5652
5653 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5654 return -EINVAL;
5655 data = kmalloc(sizeof(*data), GFP_NOFS);
5656 if (!data)
5657 return -ENOMEM;
5658 data->lsp = lsp;
5ae67c4f 5659 data->server = server;
cf470c3e
TM		 5660 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5661 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5662 data->args.lock_owner.s_dev = server->s_dev;
5663 msg.rpc_argp = &data->args;
5664 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5665 return 0;
d3c7b7cc
TM		 5666}
5667
aa1870af
BF		 5668#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5669
64c2ce8b
AK		 5670static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5671 const void *buf, size_t buflen,
5672 int flags, int type)
6b3b5496 5673{
64c2ce8b
AK		 5674 if (strcmp(key, "") != 0)
5675 return -EINVAL;
4b580ee3 5676
64c2ce8b 5677 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5678}
5679
64c2ce8b
AK		 5680static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5681 void *buf, size_t buflen, int type)
6b3b5496 5682{
64c2ce8b
AK		 5683 if (strcmp(key, "") != 0)
5684 return -EINVAL;
aa1870af 5685
64c2ce8b 5686 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5687}
5688
64c2ce8b
AK		 5689static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5690 size_t list_len, const char *name,
5691 size_t name_len, int type)
6b3b5496 5692{
64c2ce8b 5693 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5694
096455a2
BF		 5695 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5696 return 0;
64c2ce8b
AK		 5697
5698 if (list && len <= list_len)
5699 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5700 return len;
6b3b5496
BF		 5701}
5702
c9bccef6
DQ		 5703#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5704static inline int nfs4_server_supports_labels(struct nfs_server *server)
5705{
5706 return server->caps & NFS_CAP_SECURITY_LABEL;
5707}
5708
5709static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5710 const void *buf, size_t buflen,
5711 int flags, int type)
5712{
5713 if (security_ismaclabel(key))
5714 return nfs4_set_security_label(dentry, buf, buflen);
5715
5716 return -EOPNOTSUPP;
5717}
5718
5719static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5720 void *buf, size_t buflen, int type)
5721{
5722 if (security_ismaclabel(key))
5723 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5724 return -EOPNOTSUPP;
5725}
5726
5727static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5728 size_t list_len, const char *name,
5729 size_t name_len, int type)
5730{
5731 size_t len = 0;
5732
5733 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5734 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5735 if (list && len <= list_len)
5736 security_inode_listsecurity(dentry->d_inode, list, len);
5737 }
5738 return len;
5739}
5740
5741static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5742 .prefix = XATTR_SECURITY_PREFIX,
5743 .list = nfs4_xattr_list_nfs4_label,
5744 .get = nfs4_xattr_get_nfs4_label,
5745 .set = nfs4_xattr_set_nfs4_label,
5746};
5747#endif
5748
5749
533eb461
AA		 5750/*
5751 * nfs_fhget will use either the mounted_on_fileid or the fileid
5752 */
69aaaae1
TM		 5753static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5754{
533eb461
AA		 5755 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5756 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5757 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5758 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5759 return;
5760
5761 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5762 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5763 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5764 fattr->nlink = 2;
5765}
5766
f05d147f
BS		 5767static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5768 const struct qstr *name,
5769 struct nfs4_fs_locations *fs_locations,
5770 struct page *page)
683b57b4
TM		 5771{
5772 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5773 u32 bitmask[3] = {
361e624f 5774 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5775 };
5776 struct nfs4_fs_locations_arg args = {
5777 .dir_fh = NFS_FH(dir),
c228fd3a 5778 .name = name,
683b57b4
TM		 5779 .page = page,
5780 .bitmask = bitmask,
5781 };
22958463
BH		 5782 struct nfs4_fs_locations_res res = {
5783 .fs_locations = fs_locations,
5784 };
683b57b4
TM		 5785 struct rpc_message msg = {
5786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5787 .rpc_argp = &args,
22958463 5788 .rpc_resp = &res,
683b57b4
TM		 5789 };
5790 int status;
5791
3110ff80 5792 dprintk("%s: start\n", __func__);
533eb461
AA		 5793
5794 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5795 * is not supported */
5796 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5797 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5798 else
5799 bitmask[0] |= FATTR4_WORD0_FILEID;
5800
c228fd3a 5801 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5802 fs_locations->server = server;
830b8e33 5803 fs_locations->nlocations = 0;
f05d147f 5804 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5805 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5806 return status;
5807}
5808
f05d147f
BS		 5809int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5810 const struct qstr *name,
5811 struct nfs4_fs_locations *fs_locations,
5812 struct page *page)
db0a9593
BS		 5813{
5814 struct nfs4_exception exception = { };
5815 int err;
5816 do {
078ea3df
TM		 5817 err = _nfs4_proc_fs_locations(client, dir, name,
5818 fs_locations, page);
5819 trace_nfs4_get_fs_locations(dir, name, err);
5820 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5821 &exception);
5822 } while (exception.retry);
5823 return err;
5824}
5825
5ec16a85
AA		 5826/**
5827 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
5828 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
5829 */
5a5ea0d4
BS		 5830static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5831{
5832 int status;
5833 struct nfs4_secinfo_arg args = {
5834 .dir_fh = NFS_FH(dir),
5835 .name = name,
5836 };
5837 struct nfs4_secinfo_res res = {
5838 .flavors = flavors,
5839 };
5840 struct rpc_message msg = {
5841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5842 .rpc_argp = &args,
5843 .rpc_resp = &res,
5844 };
5ec16a85 5845 struct rpc_clnt *clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5a5ea0d4
BS		 5846
5847 dprintk("NFS call secinfo %s\n", name->name);
5ec16a85 5848 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5a5ea0d4
BS		 5849 dprintk("NFS reply secinfo: %d\n", status);
5850 return status;
5851}
5852
72de53ec
BS		 5853int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5854 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5855{
5856 struct nfs4_exception exception = { };
5857 int err;
5858 do {
078ea3df
TM		 5859 err = _nfs4_proc_secinfo(dir, name, flavors);
5860 trace_nfs4_secinfo(dir, name, err);
5861 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5862 &exception);
5863 } while (exception.retry);
5864 return err;
5865}
5866
557134a3 5867#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5868/*
5869 * Check the exchange flags returned by the server for invalid flags, having
5870 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5871 * DS flags set.
5872 */
5873static int nfs4_check_cl_exchange_flags(u32 flags)
5874{
5875 if (flags & ~EXCHGID4_FLAG_MASK_R)
5876 goto out_inval;
5877 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5878 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5879 goto out_inval;
5880 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5881 goto out_inval;
5882 return NFS_OK;
5883out_inval:
5884 return -NFS4ERR_INVAL;
5885}
5886
78fe0f41 5887static bool
79d4e1f0
CL		 5888nfs41_same_server_scope(struct nfs41_server_scope *a,
5889 struct nfs41_server_scope *b)
78fe0f41
WAA		 5890{
5891 if (a->server_scope_sz == b->server_scope_sz &&
5892 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5893 return true;
5894
5895 return false;
5896}
5897
7c44f1ae
WAA		 5898/*
5899 * nfs4_proc_bind_conn_to_session()
5900 *
5901 * The 4.1 client currently uses the same TCP connection for the
5902 * fore and backchannel.
5903 */
2cf047c9 5904int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5905{
5906 int status;
5907 struct nfs41_bind_conn_to_session_res res;
5908 struct rpc_message msg = {
5909 .rpc_proc =
5910 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5911 .rpc_argp = clp,
5912 .rpc_resp = &res,
2cf047c9 5913 .rpc_cred = cred,
7c44f1ae
WAA		 5914 };
5915
5916 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5917
5918 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5919 if (unlikely(res.session == NULL)) {
5920 status = -ENOMEM;
5921 goto out;
5922 }
5923
5924 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5925 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5926 if (status == 0) {
5927 if (memcmp(res.session->sess_id.data,
5928 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5929 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5930 status = -EIO;
5931 goto out_session;
5932 }
5933 if (res.dir != NFS4_CDFS4_BOTH) {
5934 dprintk("NFS: %s: Unexpected direction from server\n",
5935 __func__);
5936 status = -EIO;
5937 goto out_session;
5938 }
5939 if (res.use_conn_in_rdma_mode) {
5940 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5941 __func__);
5942 status = -EIO;
5943 goto out_session;
5944 }
5945 }
5946out_session:
5947 kfree(res.session);
5948out:
5949 dprintk("<-- %s status= %d\n", __func__, status);
5950 return status;
5951}
5952
99fe60d0
BH		 5953/*
5954 * nfs4_proc_exchange_id()
5955 *
6bbb4ae8
CL		 5956 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5957 *
99fe60d0
BH		 5958 * Since the clientid has expired, all compounds using sessions
5959 * associated with the stale clientid will be returning
5960 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5961 * be in some phase of session reset.
5962 */
4d643d1d 5963int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5964{
5965 nfs4_verifier verifier;
5966 struct nfs41_exchange_id_args args = {
cd93710e 5967 .verifier = &verifier,
99fe60d0 5968 .client = clp,
4f0b429d
TM		 5969 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5970 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5971 };
5972 struct nfs41_exchange_id_res res = {
32b01310 5973 0
99fe60d0
BH		 5974 };
5975 int status;
5976 struct rpc_message msg = {
5977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5978 .rpc_argp = &args,
5979 .rpc_resp = &res,
5980 .rpc_cred = cred,
5981 };
99fe60d0 5982
f092075d 5983 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5984 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5985 sizeof(args.id));
6bbb4ae8
CL		 5986 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5987 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5988 args.id_len, args.id);
99fe60d0 5989
acdeb69d 5990 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5991 GFP_NOFS);
acdeb69d 5992 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5993 status = -ENOMEM;
5994 goto out;
5995 }
78fe0f41 5996
79d4e1f0 5997 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5998 GFP_NOFS);
177313f1 5999 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6000 status = -ENOMEM;
acdeb69d 6001 goto out_server_owner;
abe9a6d5 6002 }
78fe0f41 6003
bbafffd2 6004 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6005 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6006 status = -ENOMEM;
6007 goto out_server_scope;
6008 }
6009
1bd714f2 6010 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6011 trace_nfs4_exchange_id(clp, status);
177313f1 6012 if (status == 0)
32b01310 6013 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6014
acdeb69d 6015 if (status == 0) {
32b01310
TM		 6016 clp->cl_clientid = res.clientid;
6017 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6018 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6019 clp->cl_seqid = res.seqid;
6020
acdeb69d
CL		 6021 kfree(clp->cl_serverowner);
6022 clp->cl_serverowner = res.server_owner;
6023 res.server_owner = NULL;
78fe0f41 6024
7d2ed9ac 6025 /* use the most recent implementation id */
59155546
CL		 6026 kfree(clp->cl_implid);
6027 clp->cl_implid = res.impl_id;
7d2ed9ac 6028
177313f1 6029 if (clp->cl_serverscope != NULL &&
79d4e1f0 6030 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6031 res.server_scope)) {
6032 dprintk("%s: server_scope mismatch detected\n",
6033 __func__);
6034 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6035 kfree(clp->cl_serverscope);
6036 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6037 }
6038
177313f1 6039 if (clp->cl_serverscope == NULL) {
79d4e1f0 6040 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6041 goto out;
6042 }
32b01310
TM		 6043 } else
6044 kfree(res.impl_id);
7d2ed9ac 6045
acdeb69d
CL		 6046out_server_owner:
6047 kfree(res.server_owner);
7d2ed9ac 6048out_server_scope:
abe9a6d5
WAA		 6049 kfree(res.server_scope);
6050out:
177313f1 6051 if (clp->cl_implid != NULL)
6bbb4ae8 6052 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6053 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6054 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6055 clp->cl_implid->date.seconds,
6056 clp->cl_implid->date.nseconds);
6bbb4ae8 6057 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6058 return status;
6059}
6060
66245539
TM		 6061static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6062 struct rpc_cred *cred)
6063{
6064 struct rpc_message msg = {
6065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6066 .rpc_argp = clp,
6067 .rpc_cred = cred,
6068 };
6069 int status;
6070
6071 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6072 trace_nfs4_destroy_clientid(clp, status);
66245539 6073 if (status)
02c67525 6074 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6075 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6076 return status;
6077}
6078
6079static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6080 struct rpc_cred *cred)
6081{
6082 unsigned int loop;
6083 int ret;
6084
6085 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6086 ret = _nfs4_proc_destroy_clientid(clp, cred);
6087 switch (ret) {
6088 case -NFS4ERR_DELAY:
6089 case -NFS4ERR_CLIENTID_BUSY:
6090 ssleep(1);
6091 break;
6092 default:
6093 return ret;
6094 }
6095 }
6096 return 0;
6097}
6098
6099int nfs4_destroy_clientid(struct nfs_client *clp)
6100{
6101 struct rpc_cred *cred;
6102 int ret = 0;
6103
6104 if (clp->cl_mvops->minor_version < 1)
6105 goto out;
6106 if (clp->cl_exchange_flags == 0)
6107 goto out;
05f4c350
CL		 6108 if (clp->cl_preserve_clid)
6109 goto out;
73d8bde5 6110 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6111 ret = nfs4_proc_destroy_clientid(clp, cred);
6112 if (cred)
6113 put_rpccred(cred);
6114 switch (ret) {
6115 case 0:
6116 case -NFS4ERR_STALE_CLIENTID:
6117 clp->cl_exchange_flags = 0;
6118 }
6119out:
6120 return ret;
6121}
6122
2050f0cc
AA		 6123struct nfs4_get_lease_time_data {
6124 struct nfs4_get_lease_time_args *args;
6125 struct nfs4_get_lease_time_res *res;
6126 struct nfs_client *clp;
6127};
6128
6129static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6130 void *calldata)
6131{
2050f0cc
AA		 6132 struct nfs4_get_lease_time_data *data =
6133 (struct nfs4_get_lease_time_data *)calldata;
6134
6135 dprintk("--> %s\n", __func__);
6136 /* just setup sequence, do not trigger session recovery
6137 since we're invoked within one */
d9afbd1b
TM		 6138 nfs41_setup_sequence(data->clp->cl_session,
6139 &data->args->la_seq_args,
6140 &data->res->lr_seq_res,
6141 task);
2050f0cc
AA		 6142 dprintk("<-- %s\n", __func__);
6143}
6144
6145/*
6146 * Called from nfs4_state_manager thread for session setup, so don't recover
6147 * from sequence operation or clientid errors.
6148 */
6149static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6150{
6151 struct nfs4_get_lease_time_data *data =
6152 (struct nfs4_get_lease_time_data *)calldata;
6153
6154 dprintk("--> %s\n", __func__);
14516c3a
TM		 6155 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6156 return;
2050f0cc
AA		 6157 switch (task->tk_status) {
6158 case -NFS4ERR_DELAY:
6159 case -NFS4ERR_GRACE:
6160 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6161 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6162 task->tk_status = 0;
a8a4ae3a
AA		 6163 /* fall through */
6164 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6165 rpc_restart_call_prepare(task);
2050f0cc
AA		 6166 return;
6167 }
2050f0cc
AA		 6168 dprintk("<-- %s\n", __func__);
6169}
6170
17280175 6171static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6172 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6173 .rpc_call_done = nfs4_get_lease_time_done,
6174};
6175
6176int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6177{
6178 struct rpc_task *task;
6179 struct nfs4_get_lease_time_args args;
6180 struct nfs4_get_lease_time_res res = {
6181 .lr_fsinfo = fsinfo,
6182 };
6183 struct nfs4_get_lease_time_data data = {
6184 .args = &args,
6185 .res = &res,
6186 .clp = clp,
6187 };
6188 struct rpc_message msg = {
6189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6190 .rpc_argp = &args,
6191 .rpc_resp = &res,
6192 };
6193 struct rpc_task_setup task_setup = {
6194 .rpc_client = clp->cl_rpcclient,
6195 .rpc_message = &msg,
6196 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6197 .callback_data = &data,
6198 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6199 };
6200 int status;
6201
9d12b216 6202 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6203 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6204 dprintk("--> %s\n", __func__);
6205 task = rpc_run_task(&task_setup);
6206
6207 if (IS_ERR(task))
6208 status = PTR_ERR(task);
6209 else {
6210 status = task->tk_status;
6211 rpc_put_task(task);
6212 }
6213 dprintk("<-- %s return %d\n", __func__, status);
6214
6215 return status;
6216}
6217
fc931582
AA		 6218/*
6219 * Initialize the values to be used by the client in CREATE_SESSION
6220 * If nfs4_init_session set the fore channel request and response sizes,
6221 * use them.
6222 *
6223 * Set the back channel max_resp_sz_cached to zero to force the client to
6224 * always set csa_cachethis to FALSE because the current implementation
6225 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6226 */
6227static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6228{
18aad3d5
AA		 6229 unsigned int max_rqst_sz, max_resp_sz;
6230
6231 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6232 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6233
fc931582 6234 /* Fore channel attributes */
18aad3d5
AA		 6235 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6236 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6237 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6238 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6239
6240 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6241 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6242 __func__,
6243 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6244 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6245
6246 /* Back channel attributes */
fc931582
AA		 6247 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6248 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6249 args->bc_attrs.max_resp_sz_cached = 0;
6250 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6251 args->bc_attrs.max_reqs = 1;
6252
6253 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6254 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6255 __func__,
6256 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6257 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6258 args->bc_attrs.max_reqs);
6259}
6260
43c2e885 6261static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6262{
43c2e885
BF		 6263 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6264 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6265
43c2e885
BF		 6266 if (rcvd->max_resp_sz > sent->max_resp_sz)
6267 return -EINVAL;
6268 /*
6269 * Our requested max_ops is the minimum we need; we're not
6270 * prepared to break up compounds into smaller pieces than that.
6271 * So, no point even trying to continue if the server won't
6272 * cooperate:
6273 */
6274 if (rcvd->max_ops < sent->max_ops)
6275 return -EINVAL;
6276 if (rcvd->max_reqs == 0)
6277 return -EINVAL;
b4b9a0c1
VG		 6278 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6279 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6280 return 0;
8d35301d
AA		 6281}
6282
43c2e885
BF		 6283static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6284{
6285 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6286 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6287
43c2e885
BF		 6288 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6289 return -EINVAL;
6290 if (rcvd->max_resp_sz < sent->max_resp_sz)
6291 return -EINVAL;
6292 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6293 return -EINVAL;
6294 /* These would render the backchannel useless: */
b4b9a0c1 6295 if (rcvd->max_ops != sent->max_ops)
43c2e885 6296 return -EINVAL;
b4b9a0c1 6297 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6298 return -EINVAL;
6299 return 0;
6300}
8d35301d 6301
8d35301d
AA		 6302static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6303 struct nfs4_session *session)
6304{
43c2e885 6305 int ret;
8d35301d 6306
43c2e885
BF		 6307 ret = nfs4_verify_fore_channel_attrs(args, session);
6308 if (ret)
6309 return ret;
6310 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6311}
6312
848f5bda
TM		 6313static int _nfs4_proc_create_session(struct nfs_client *clp,
6314 struct rpc_cred *cred)
fc931582
AA		 6315{
6316 struct nfs4_session *session = clp->cl_session;
6317 struct nfs41_create_session_args args = {
6318 .client = clp,
6319 .cb_program = NFS4_CALLBACK,
6320 };
6321 struct nfs41_create_session_res res = {
6322 .client = clp,
6323 };
6324 struct rpc_message msg = {
6325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6326 .rpc_argp = &args,
6327 .rpc_resp = &res,
848f5bda 6328 .rpc_cred = cred,
fc931582
AA		 6329 };
6330 int status;
6331
6332 nfs4_init_channel_attrs(&args);
0f91421e 6333 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6334
1bd714f2 6335 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6336 trace_nfs4_create_session(clp, status);
fc931582 6337
43095d39 6338 if (!status) {
8d35301d
AA		 6339 /* Verify the session's negotiated channel_attrs values */
6340 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6341 /* Increment the clientid slot sequence id */
6342 clp->cl_seqid++;
6343 }
6344
6345 return status;
6346}
6347
6348/*
6349 * Issues a CREATE_SESSION operation to the server.
6350 * It is the responsibility of the caller to verify the session is
6351 * expired before calling this routine.
6352 */
848f5bda 6353int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6354{
6355 int status;
6356 unsigned *ptr;
fc931582
AA		 6357 struct nfs4_session *session = clp->cl_session;
6358
6359 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6360
848f5bda 6361 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6362 if (status)
6363 goto out;
6364
aacd5537
AA		 6365 /* Init or reset the session slot tables */
6366 status = nfs4_setup_session_slot_tables(session);
6367 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6368 if (status)
6369 goto out;
6370
6371 ptr = (unsigned *)&session->sess_id.data[0];
6372 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6373 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6374out:
6375 dprintk("<-- %s\n", __func__);
6376 return status;
6377}
6378
0f3e66c6
AA		 6379/*
6380 * Issue the over-the-wire RPC DESTROY_SESSION.
6381 * The caller must serialize access to this routine.
6382 */
848f5bda
TM		 6383int nfs4_proc_destroy_session(struct nfs4_session *session,
6384 struct rpc_cred *cred)
0f3e66c6 6385{
848f5bda
TM		 6386 struct rpc_message msg = {
6387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6388 .rpc_argp = session,
6389 .rpc_cred = cred,
6390 };
0f3e66c6 6391 int status = 0;
0f3e66c6
AA		 6392
6393 dprintk("--> nfs4_proc_destroy_session\n");
6394
6395 /* session is still being setup */
6396 if (session->clp->cl_cons_state != NFS_CS_READY)
6397 return status;
6398
1bd714f2 6399 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6400 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6401
6402 if (status)
08106ac7 6403 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6404 "Session has been destroyed regardless...\n", status);
6405
6406 dprintk("<-- nfs4_proc_destroy_session\n");
6407 return status;
6408}
6409
fc01cea9
AA		 6410/*
6411 * Renew the cl_session lease.
6412 */
d5f8d3fe
TM		 6413struct nfs4_sequence_data {
6414 struct nfs_client *clp;
6415 struct nfs4_sequence_args args;
6416 struct nfs4_sequence_res res;
6417};
6418
dc96aef9
AB		 6419static void nfs41_sequence_release(void *data)
6420{
d5f8d3fe
TM		 6421 struct nfs4_sequence_data *calldata = data;
6422 struct nfs_client *clp = calldata->clp;
dc96aef9 6423
7135840f
AB		 6424 if (atomic_read(&clp->cl_count) > 1)
6425 nfs4_schedule_state_renewal(clp);
6426 nfs_put_client(clp);
d5f8d3fe 6427 kfree(calldata);
dc96aef9
AB		 6428}
6429
aa5190d0
TM		 6430static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6431{
6432 switch(task->tk_status) {
6433 case -NFS4ERR_DELAY:
aa5190d0
TM		 6434 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6435 return -EAGAIN;
6436 default:
0400a6b0 6437 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6438 }
6439 return 0;
6440}
6441
dc96aef9 6442static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6443{
d5f8d3fe
TM		 6444 struct nfs4_sequence_data *calldata = data;
6445 struct nfs_client *clp = calldata->clp;
fc01cea9 6446
14516c3a
TM		 6447 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6448 return;
fc01cea9 6449
c6d01c6f 6450 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6451 if (task->tk_status < 0) {
6452 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6453 if (atomic_read(&clp->cl_count) == 1)
6454 goto out;
fc01cea9 6455
aa5190d0
TM		 6456 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6457 rpc_restart_call_prepare(task);
fc01cea9
AA		 6458 return;
6459 }
6460 }
fc01cea9 6461 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6462out:
fc01cea9
AA		 6463 dprintk("<-- %s\n", __func__);
6464}
6465
6466static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6467{
d5f8d3fe
TM		 6468 struct nfs4_sequence_data *calldata = data;
6469 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6470 struct nfs4_sequence_args *args;
6471 struct nfs4_sequence_res *res;
6472
fc01cea9
AA		 6473 args = task->tk_msg.rpc_argp;
6474 res = task->tk_msg.rpc_resp;
6475
d9afbd1b 6476 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6477}
6478
6479static const struct rpc_call_ops nfs41_sequence_ops = {
6480 .rpc_call_done = nfs41_sequence_call_done,
6481 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6482 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6483};
6484
8fe72bac
TM		 6485static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6486 struct rpc_cred *cred,
6487 bool is_privileged)
fc01cea9 6488{
d5f8d3fe 6489 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6490 struct rpc_message msg = {
6491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6492 .rpc_cred = cred,
6493 };
71ac6da9
TM		 6494 struct rpc_task_setup task_setup_data = {
6495 .rpc_client = clp->cl_rpcclient,
6496 .rpc_message = &msg,
8fe72bac 6497 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6498 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6499 };
fc01cea9 6500
7135840f 6501 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6502 return ERR_PTR(-EIO);
dfb4f309 6503 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6504 if (calldata == NULL) {
7135840f 6505 nfs_put_client(clp);
71ac6da9 6506 return ERR_PTR(-ENOMEM);
fc01cea9 6507 }
9d12b216 6508 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6509 if (is_privileged)
6510 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6511 msg.rpc_argp = &calldata->args;
6512 msg.rpc_resp = &calldata->res;
6513 calldata->clp = clp;
71ac6da9 6514 task_setup_data.callback_data = calldata;
fc01cea9 6515
71ac6da9
TM		 6516 return rpc_run_task(&task_setup_data);
6517}
6518
2f60ea6b 6519static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6520{
6521 struct rpc_task *task;
6522 int ret = 0;
6523
2f60ea6b
TM		 6524 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6525 return 0;
8fe72bac 6526 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6527 if (IS_ERR(task))
6528 ret = PTR_ERR(task);
6529 else
bf294b41 6530 rpc_put_task_async(task);
71ac6da9
TM		 6531 dprintk("<-- %s status=%d\n", __func__, ret);
6532 return ret;
6533}
6534
6535static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6536{
6537 struct rpc_task *task;
6538 int ret;
6539
8fe72bac 6540 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6541 if (IS_ERR(task)) {
6542 ret = PTR_ERR(task);
6543 goto out;
6544 }
6545 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6546 if (!ret) {
6547 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6548
6549 if (task->tk_status == 0)
6550 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6551 ret = task->tk_status;
b4410c2f 6552 }
71ac6da9
TM		 6553 rpc_put_task(task);
6554out:
6555 dprintk("<-- %s status=%d\n", __func__, ret);
6556 return ret;
fc01cea9
AA		 6557}
6558
fce5c838
RL		 6559struct nfs4_reclaim_complete_data {
6560 struct nfs_client *clp;
6561 struct nfs41_reclaim_complete_args arg;
6562 struct nfs41_reclaim_complete_res res;
6563};
6564
6565static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6566{
6567 struct nfs4_reclaim_complete_data *calldata = data;
6568
d9afbd1b
TM		 6569 nfs41_setup_sequence(calldata->clp->cl_session,
6570 &calldata->arg.seq_args,
6571 &calldata->res.seq_res,
6572 task);
fce5c838
RL		 6573}
6574
aa5190d0
TM		 6575static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6576{
6577 switch(task->tk_status) {
6578 case 0:
6579 case -NFS4ERR_COMPLETE_ALREADY:
6580 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6581 break;
6582 case -NFS4ERR_DELAY:
aa5190d0 6583 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6584 /* fall through */
6585 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6586 return -EAGAIN;
6587 default:
0400a6b0 6588 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6589 }
6590 return 0;
6591}
6592
fce5c838
RL		 6593static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6594{
6595 struct nfs4_reclaim_complete_data *calldata = data;
6596 struct nfs_client *clp = calldata->clp;
6597 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6598
6599 dprintk("--> %s\n", __func__);
14516c3a
TM		 6600 if (!nfs41_sequence_done(task, res))
6601 return;
fce5c838 6602
c6d01c6f 6603 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6604 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6605 rpc_restart_call_prepare(task);
6606 return;
6607 }
fce5c838
RL		 6608 dprintk("<-- %s\n", __func__);
6609}
6610
6611static void nfs4_free_reclaim_complete_data(void *data)
6612{
6613 struct nfs4_reclaim_complete_data *calldata = data;
6614
6615 kfree(calldata);
6616}
6617
6618static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6619 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6620 .rpc_call_done = nfs4_reclaim_complete_done,
6621 .rpc_release = nfs4_free_reclaim_complete_data,
6622};
6623
6624/*
6625 * Issue a global reclaim complete.
6626 */
965e9c23
TM		 6627static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6628 struct rpc_cred *cred)
fce5c838
RL		 6629{
6630 struct nfs4_reclaim_complete_data *calldata;
6631 struct rpc_task *task;
6632 struct rpc_message msg = {
6633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6634 .rpc_cred = cred,
fce5c838
RL		 6635 };
6636 struct rpc_task_setup task_setup_data = {
6637 .rpc_client = clp->cl_rpcclient,
6638 .rpc_message = &msg,
6639 .callback_ops = &nfs4_reclaim_complete_call_ops,
6640 .flags = RPC_TASK_ASYNC,
6641 };
6642 int status = -ENOMEM;
6643
6644 dprintk("--> %s\n", __func__);
8535b2be 6645 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6646 if (calldata == NULL)
6647 goto out;
6648 calldata->clp = clp;
6649 calldata->arg.one_fs = 0;
fce5c838 6650
9d12b216 6651 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6652 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6653 msg.rpc_argp = &calldata->arg;
6654 msg.rpc_resp = &calldata->res;
6655 task_setup_data.callback_data = calldata;
6656 task = rpc_run_task(&task_setup_data);
acf82b85 6657 if (IS_ERR(task)) {
fce5c838 6658 status = PTR_ERR(task);
acf82b85
DC		 6659 goto out;
6660 }
c34c32ea
AA		 6661 status = nfs4_wait_for_completion_rpc_task(task);
6662 if (status == 0)
6663 status = task->tk_status;
fce5c838 6664 rpc_put_task(task);
acf82b85 6665 return 0;
fce5c838
RL		 6666out:
6667 dprintk("<-- %s status=%d\n", __func__, status);
6668 return status;
6669}
b1f69b75
AA		 6670
6671static void
6672nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6673{
6674 struct nfs4_layoutget *lgp = calldata;
c31663d4 6675 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6676 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6677
6678 dprintk("--> %s\n", __func__);
c31663d4
FI		 6679 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6680 * right now covering the LAYOUTGET we are about to send.
6681 * However, that is not so catastrophic, and there seems
6682 * to be no way to prevent it completely.
6683 */
6ba7db34 6684 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6685 &lgp->res.seq_res, task))
b1f69b75 6686 return;
cf7d63f1
FI		 6687 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6688 NFS_I(lgp->args.inode)->layout,
6689 lgp->args.ctx->state)) {
6690 rpc_exit(task, NFS4_OK);
cf7d63f1 6691 }
b1f69b75
AA		 6692}
6693
6694static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6695{
6696 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6697 struct inode *inode = lgp->args.inode;
6698 struct nfs_server *server = NFS_SERVER(inode);
6699 struct pnfs_layout_hdr *lo;
6700 struct nfs4_state *state = NULL;
30005121 6701 unsigned long timeo, giveup;
b1f69b75
AA		 6702
6703 dprintk("--> %s\n", __func__);
6704
6ba7db34 6705 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6706 goto out;
b1f69b75
AA		 6707
6708 switch (task->tk_status) {
6709 case 0:
ee314c2a 6710 goto out;
b1f69b75
AA		 6711 case -NFS4ERR_LAYOUTTRYLATER:
6712 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6713 timeo = rpc_get_timeout(task->tk_client);
6714 giveup = lgp->args.timestamp + timeo;
6715 if (time_after(giveup, jiffies))
6716 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6717 break;
6718 case -NFS4ERR_EXPIRED:
6719 case -NFS4ERR_BAD_STATEID:
6720 spin_lock(&inode->i_lock);
6721 lo = NFS_I(inode)->layout;
6722 if (!lo || list_empty(&lo->plh_segs)) {
6723 spin_unlock(&inode->i_lock);
6724 /* If the open stateid was bad, then recover it. */
6725 state = lgp->args.ctx->state;
6726 } else {
6727 LIST_HEAD(head);
6728
6729 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6730 spin_unlock(&inode->i_lock);
6731 /* Mark the bad layout state as invalid, then
6732 * retry using the open stateid. */
6733 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6734 }
6735 }
ee314c2a
TM		 6736 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6737 rpc_restart_call_prepare(task);
6738out:
b1f69b75
AA		 6739 dprintk("<-- %s\n", __func__);
6740}
6741
8554116e
IK		 6742static size_t max_response_pages(struct nfs_server *server)
6743{
6744 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6745 return nfs_page_array_len(0, max_resp_sz);
6746}
6747
6748static void nfs4_free_pages(struct page **pages, size_t size)
6749{
6750 int i;
6751
6752 if (!pages)
6753 return;
6754
6755 for (i = 0; i < size; i++) {
6756 if (!pages[i])
6757 break;
6758 __free_page(pages[i]);
6759 }
6760 kfree(pages);
6761}
6762
6763static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6764{
6765 struct page **pages;
6766 int i;
6767
6768 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6769 if (!pages) {
6770 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6771 return NULL;
6772 }
6773
6774 for (i = 0; i < size; i++) {
6775 pages[i] = alloc_page(gfp_flags);
6776 if (!pages[i]) {
6777 dprintk("%s: failed to allocate page\n", __func__);
6778 nfs4_free_pages(pages, size);
6779 return NULL;
6780 }
6781 }
6782
6783 return pages;
6784}
6785
b1f69b75
AA		 6786static void nfs4_layoutget_release(void *calldata)
6787{
6788 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6789 struct inode *inode = lgp->args.inode;
6790 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6791 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6792
6793 dprintk("--> %s\n", __func__);
8554116e 6794 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6795 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6796 put_nfs_open_context(lgp->args.ctx);
6797 kfree(calldata);
6798 dprintk("<-- %s\n", __func__);
6799}
6800
6801static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6802 .rpc_call_prepare = nfs4_layoutget_prepare,
6803 .rpc_call_done = nfs4_layoutget_done,
6804 .rpc_release = nfs4_layoutget_release,
6805};
6806
a0b0a6e3
TM		 6807struct pnfs_layout_segment *
6808nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6809{
a47970ff
WAA		 6810 struct inode *inode = lgp->args.inode;
6811 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6812 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6813 struct rpc_task *task;
6814 struct rpc_message msg = {
6815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6816 .rpc_argp = &lgp->args,
6817 .rpc_resp = &lgp->res,
6ab59344 6818 .rpc_cred = lgp->cred,
b1f69b75
AA		 6819 };
6820 struct rpc_task_setup task_setup_data = {
6821 .rpc_client = server->client,
6822 .rpc_message = &msg,
6823 .callback_ops = &nfs4_layoutget_call_ops,
6824 .callback_data = lgp,
6825 .flags = RPC_TASK_ASYNC,
6826 };
a0b0a6e3 6827 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6828 int status = 0;
6829
6830 dprintk("--> %s\n", __func__);
6831
8554116e
IK		 6832 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6833 if (!lgp->args.layout.pages) {
6834 nfs4_layoutget_release(lgp);
a0b0a6e3 6835 return ERR_PTR(-ENOMEM);
8554116e
IK		 6836 }
6837 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6838 lgp->args.timestamp = jiffies;
8554116e 6839
35124a09 6840 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6841 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6842 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6843
6844 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6845 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6846
b1f69b75
AA		 6847 task = rpc_run_task(&task_setup_data);
6848 if (IS_ERR(task))
a0b0a6e3 6849 return ERR_CAST(task);
b1f69b75 6850 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6851 if (status == 0)
6852 status = task->tk_status;
085b7a45
WAA		 6853 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6854 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6855 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6856 rpc_put_task(task);
6857 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6858 if (status)
6859 return ERR_PTR(status);
6860 return lseg;
b1f69b75
AA		 6861}
6862
cbe82603
BH		 6863static void
6864nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6865{
6866 struct nfs4_layoutreturn *lrp = calldata;
6867
6868 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6869 nfs41_setup_sequence(lrp->clp->cl_session,
6870 &lrp->args.seq_args,
6871 &lrp->res.seq_res,
6872 task);
cbe82603
BH		 6873}
6874
6875static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6876{
6877 struct nfs4_layoutreturn *lrp = calldata;
6878 struct nfs_server *server;
6879
6880 dprintk("--> %s\n", __func__);
6881
6ba7db34 6882 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6883 return;
6884
6885 server = NFS_SERVER(lrp->args.inode);
6886 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6887 rpc_restart_call_prepare(task);
cbe82603
BH		 6888 return;
6889 }
cbe82603
BH		 6890 dprintk("<-- %s\n", __func__);
6891}
6892
6893static void nfs4_layoutreturn_release(void *calldata)
6894{
6895 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6896 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6897
6898 dprintk("--> %s\n", __func__);
849b286f
TM		 6899 spin_lock(&lo->plh_inode->i_lock);
6900 if (lrp->res.lrs_present)
6901 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6902 lo->plh_block_lgets--;
6903 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6904 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6905 kfree(calldata);
6906 dprintk("<-- %s\n", __func__);
6907}
6908
6909static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6910 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6911 .rpc_call_done = nfs4_layoutreturn_done,
6912 .rpc_release = nfs4_layoutreturn_release,
6913};
6914
6915int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6916{
6917 struct rpc_task *task;
6918 struct rpc_message msg = {
6919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6920 .rpc_argp = &lrp->args,
6921 .rpc_resp = &lrp->res,
9556000d 6922 .rpc_cred = lrp->cred,
cbe82603
BH		 6923 };
6924 struct rpc_task_setup task_setup_data = {
1771c577 6925 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6926 .rpc_message = &msg,
6927 .callback_ops = &nfs4_layoutreturn_call_ops,
6928 .callback_data = lrp,
6929 };
6930 int status;
6931
6932 dprintk("--> %s\n", __func__);
9d12b216 6933 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6934 task = rpc_run_task(&task_setup_data);
6935 if (IS_ERR(task))
6936 return PTR_ERR(task);
6937 status = task->tk_status;
6938 dprintk("<-- %s status=%d\n", __func__, status);
6939 rpc_put_task(task);
6940 return status;
6941}
6942
7f11d8d3
AA		 6943/*
6944 * Retrieve the list of Data Server devices from the MDS.
6945 */
6946static int _nfs4_getdevicelist(struct nfs_server *server,
6947 const struct nfs_fh *fh,
6948 struct pnfs_devicelist *devlist)
6949{
6950 struct nfs4_getdevicelist_args args = {
6951 .fh = fh,
6952 .layoutclass = server->pnfs_curr_ld->id,
6953 };
6954 struct nfs4_getdevicelist_res res = {
6955 .devlist = devlist,
6956 };
6957 struct rpc_message msg = {
6958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6959 .rpc_argp = &args,
6960 .rpc_resp = &res,
6961 };
6962 int status;
6963
6964 dprintk("--> %s\n", __func__);
6965 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6966 &res.seq_res, 0);
6967 dprintk("<-- %s status=%d\n", __func__, status);
6968 return status;
6969}
6970
6971int nfs4_proc_getdevicelist(struct nfs_server *server,
6972 const struct nfs_fh *fh,
6973 struct pnfs_devicelist *devlist)
6974{
6975 struct nfs4_exception exception = { };
6976 int err;
6977
6978 do {
6979 err = nfs4_handle_exception(server,
6980 _nfs4_getdevicelist(server, fh, devlist),
6981 &exception);
6982 } while (exception.retry);
6983
6984 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6985 err, devlist->num_devs);
6986
6987 return err;
6988}
6989EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6990
b1f69b75 6991static int
cd5875fe
TM		 6992_nfs4_proc_getdeviceinfo(struct nfs_server *server,
6993 struct pnfs_device *pdev,
6994 struct rpc_cred *cred)
b1f69b75
AA		 6995{
6996 struct nfs4_getdeviceinfo_args args = {
6997 .pdev = pdev,
6998 };
6999 struct nfs4_getdeviceinfo_res res = {
7000 .pdev = pdev,
7001 };
7002 struct rpc_message msg = {
7003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7004 .rpc_argp = &args,
7005 .rpc_resp = &res,
cd5875fe 7006 .rpc_cred = cred,
b1f69b75
AA		 7007 };
7008 int status;
7009
7010 dprintk("--> %s\n", __func__);
7c513058 7011 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7012 dprintk("<-- %s status=%d\n", __func__, status);
7013
7014 return status;
7015}
7016
cd5875fe
TM		 7017int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7018 struct pnfs_device *pdev,
7019 struct rpc_cred *cred)
b1f69b75
AA		 7020{
7021 struct nfs4_exception exception = { };
7022 int err;
7023
7024 do {
7025 err = nfs4_handle_exception(server,
cd5875fe 7026 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7027 &exception);
7028 } while (exception.retry);
7029 return err;
7030}
7031EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7032
863a3c6c
AA		 7033static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7034{
7035 struct nfs4_layoutcommit_data *data = calldata;
7036 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7037 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7038
d9afbd1b
TM		 7039 nfs41_setup_sequence(session,
7040 &data->args.seq_args,
7041 &data->res.seq_res,
7042 task);
863a3c6c
AA		 7043}
7044
7045static void
7046nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7047{
7048 struct nfs4_layoutcommit_data *data = calldata;
7049 struct nfs_server *server = NFS_SERVER(data->args.inode);
7050
6ba7db34 7051 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7052 return;
7053
7054 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7055 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7056 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7057 case -NFS4ERR_BADLAYOUT: /* no layout */
7058 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7059 task->tk_status = 0;
e59d27e0
TM		 7060 break;
7061 case 0:
863a3c6c
AA		 7062 nfs_post_op_update_inode_force_wcc(data->args.inode,
7063 data->res.fattr);
e59d27e0
TM		 7064 break;
7065 default:
7066 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7067 rpc_restart_call_prepare(task);
7068 return;
7069 }
7070 }
863a3c6c
AA		 7071}
7072
7073static void nfs4_layoutcommit_release(void *calldata)
7074{
7075 struct nfs4_layoutcommit_data *data = calldata;
7076
db29c089 7077 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7078 put_rpccred(data->cred);
7079 kfree(data);
7080}
7081
7082static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7083 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7084 .rpc_call_done = nfs4_layoutcommit_done,
7085 .rpc_release = nfs4_layoutcommit_release,
7086};
7087
7088int
ef311537 7089nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7090{
7091 struct rpc_message msg = {
7092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7093 .rpc_argp = &data->args,
7094 .rpc_resp = &data->res,
7095 .rpc_cred = data->cred,
7096 };
7097 struct rpc_task_setup task_setup_data = {
7098 .task = &data->task,
7099 .rpc_client = NFS_CLIENT(data->args.inode),
7100 .rpc_message = &msg,
7101 .callback_ops = &nfs4_layoutcommit_ops,
7102 .callback_data = data,
7103 .flags = RPC_TASK_ASYNC,
7104 };
7105 struct rpc_task *task;
7106 int status = 0;
7107
7108 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7109 "lbw: %llu inode %lu\n",
7110 data->task.tk_pid, sync,
7111 data->args.lastbytewritten,
7112 data->args.inode->i_ino);
7113
9d12b216 7114 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7115 task = rpc_run_task(&task_setup_data);
7116 if (IS_ERR(task))
7117 return PTR_ERR(task);
ef311537 7118 if (sync == false)
863a3c6c
AA		 7119 goto out;
7120 status = nfs4_wait_for_completion_rpc_task(task);
7121 if (status != 0)
7122 goto out;
7123 status = task->tk_status;
7124out:
7125 dprintk("%s: status %d\n", __func__, status);
7126 rpc_put_task(task);
7127 return status;
7128}
fca78d6d 7129
97431204
AA		 7130/**
7131 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7132 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7133 */
fca78d6d
BS		 7134static int
7135_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7136 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7137{
7138 struct nfs41_secinfo_no_name_args args = {
7139 .style = SECINFO_STYLE_CURRENT_FH,
7140 };
7141 struct nfs4_secinfo_res res = {
7142 .flavors = flavors,
7143 };
7144 struct rpc_message msg = {
7145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7146 .rpc_argp = &args,
7147 .rpc_resp = &res,
7148 };
97431204
AA		 7149 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7150 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7151}
7152
7153static int
7154nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7155 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7156{
7157 struct nfs4_exception exception = { };
7158 int err;
7159 do {
7160 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7161 switch (err) {
7162 case 0:
7163 case -NFS4ERR_WRONGSEC:
7164 case -NFS4ERR_NOTSUPP:
05e9cfb4 7165 goto out;
fca78d6d
BS		 7166 default:
7167 err = nfs4_handle_exception(server, err, &exception);
7168 }
7169 } while (exception.retry);
05e9cfb4 7170out:
fca78d6d
BS		 7171 return err;
7172}
7173
7174static int
7175nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7176 struct nfs_fsinfo *info)
7177{
7178 int err;
7179 struct page *page;
7180 rpc_authflavor_t flavor;
7181 struct nfs4_secinfo_flavors *flavors;
7182
7183 page = alloc_page(GFP_KERNEL);
7184 if (!page) {
7185 err = -ENOMEM;
7186 goto out;
7187 }
7188
7189 flavors = page_address(page);
7190 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7191
7192 /*
7193 * Fall back on "guess and check" method if
7194 * the server doesn't support SECINFO_NO_NAME
7195 */
7196 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7197 err = nfs4_find_root_sec(server, fhandle, info);
7198 goto out_freepage;
7199 }
7200 if (err)
7201 goto out_freepage;
7202
7203 flavor = nfs_find_best_sec(flavors);
7204 if (err == 0)
7205 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7206
7207out_freepage:
7208 put_page(page);
7209 if (err == -EACCES)
7210 return -EPERM;
7211out:
7212 return err;
7213}
1cab0652 7214
ab7cb0df
TM		 7215static int _nfs41_test_stateid(struct nfs_server *server,
7216 nfs4_stateid *stateid,
7217 struct rpc_cred *cred)
7d974794
BS		 7218{
7219 int status;
7220 struct nfs41_test_stateid_args args = {
1cab0652 7221 .stateid = stateid,
7d974794
BS		 7222 };
7223 struct nfs41_test_stateid_res res;
7224 struct rpc_message msg = {
7225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7226 .rpc_argp = &args,
7227 .rpc_resp = &res,
ab7cb0df 7228 .rpc_cred = cred,
7d974794 7229 };
1cab0652 7230
38527b15 7231 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7232 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7233 nfs4_set_sequence_privileged(&args.seq_args);
7234 status = nfs4_call_sync_sequence(server->client, server, &msg,
7235 &args.seq_args, &res.seq_res);
38527b15
CL		 7236 if (status != NFS_OK) {
7237 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7238 return status;
38527b15
CL		 7239 }
7240 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7241 return -res.status;
7d974794
BS		 7242}
7243
38527b15
CL		 7244/**
7245 * nfs41_test_stateid - perform a TEST_STATEID operation
7246 *
7247 * @server: server / transport on which to perform the operation
7248 * @stateid: state ID to test
ab7cb0df 7249 * @cred: credential
38527b15
CL		 7250 *
7251 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7252 * Otherwise a negative NFS4ERR value is returned if the operation
7253 * failed or the state ID is not currently valid.
7254 */
ab7cb0df
TM		 7255static int nfs41_test_stateid(struct nfs_server *server,
7256 nfs4_stateid *stateid,
7257 struct rpc_cred *cred)
7d974794
BS		 7258{
7259 struct nfs4_exception exception = { };
7260 int err;
7261 do {
ab7cb0df 7262 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7263 if (err != -NFS4ERR_DELAY)
7264 break;
7265 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7266 } while (exception.retry);
7267 return err;
7268}
9aeda35f 7269
7c1d5fae
TM		 7270struct nfs_free_stateid_data {
7271 struct nfs_server *server;
7272 struct nfs41_free_stateid_args args;
9aeda35f 7273 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7274};
7275
7276static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7277{
7278 struct nfs_free_stateid_data *data = calldata;
7279 nfs41_setup_sequence(nfs4_get_session(data->server),
7280 &data->args.seq_args,
7281 &data->res.seq_res,
7282 task);
7283}
7284
7285static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7286{
7287 struct nfs_free_stateid_data *data = calldata;
7288
7289 nfs41_sequence_done(task, &data->res.seq_res);
7290
7291 switch (task->tk_status) {
7292 case -NFS4ERR_DELAY:
7293 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7294 rpc_restart_call_prepare(task);
7295 }
7296}
7297
7298static void nfs41_free_stateid_release(void *calldata)
7299{
7300 kfree(calldata);
7301}
7302
17f26b12 7303static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7304 .rpc_call_prepare = nfs41_free_stateid_prepare,
7305 .rpc_call_done = nfs41_free_stateid_done,
7306 .rpc_release = nfs41_free_stateid_release,
7307};
7308
7309static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7310 nfs4_stateid *stateid,
ab7cb0df 7311 struct rpc_cred *cred,
7c1d5fae
TM		 7312 bool privileged)
7313{
9aeda35f
BS		 7314 struct rpc_message msg = {
7315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7316 .rpc_cred = cred,
9aeda35f 7317 };
7c1d5fae
TM		 7318 struct rpc_task_setup task_setup = {
7319 .rpc_client = server->client,
7320 .rpc_message = &msg,
7321 .callback_ops = &nfs41_free_stateid_ops,
7322 .flags = RPC_TASK_ASYNC,
7323 };
7324 struct nfs_free_stateid_data *data;
9aeda35f 7325
38527b15 7326 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7327 data = kmalloc(sizeof(*data), GFP_NOFS);
7328 if (!data)
7329 return ERR_PTR(-ENOMEM);
7330 data->server = server;
7331 nfs4_stateid_copy(&data->args.stateid, stateid);
7332
7333 task_setup.callback_data = data;
7334
7335 msg.rpc_argp = &data->args;
7336 msg.rpc_resp = &data->res;
7337 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7338 if (privileged)
7339 nfs4_set_sequence_privileged(&data->args.seq_args);
7340
7341 return rpc_run_task(&task_setup);
9aeda35f
BS		 7342}
7343
38527b15
CL		 7344/**
7345 * nfs41_free_stateid - perform a FREE_STATEID operation
7346 *
7347 * @server: server / transport on which to perform the operation
7348 * @stateid: state ID to release
ab7cb0df 7349 * @cred: credential
38527b15
CL		 7350 *
7351 * Returns NFS_OK if the server freed "stateid". Otherwise a
7352 * negative NFS4ERR value is returned.
7353 */
ab7cb0df
TM		 7354static int nfs41_free_stateid(struct nfs_server *server,
7355 nfs4_stateid *stateid,
7356 struct rpc_cred *cred)
9aeda35f 7357{
7c1d5fae
TM		 7358 struct rpc_task *task;
7359 int ret;
7360
ab7cb0df 7361 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7362 if (IS_ERR(task))
7363 return PTR_ERR(task);
7364 ret = rpc_wait_for_completion_task(task);
7365 if (!ret)
7366 ret = task->tk_status;
7367 rpc_put_task(task);
7368 return ret;
9aeda35f 7369}
36281caa 7370
c8b2d0bf
TM		 7371static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7372{
7373 struct rpc_task *task;
ab7cb0df 7374 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7375
ab7cb0df 7376 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7377 nfs4_free_lock_state(server, lsp);
7378 if (IS_ERR(task))
7379 return PTR_ERR(task);
7380 rpc_put_task(task);
7381 return 0;
7382}
7383
36281caa
TM		 7384static bool nfs41_match_stateid(const nfs4_stateid *s1,
7385 const nfs4_stateid *s2)
7386{
2d2f24ad 7387 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7388 return false;
7389
2d2f24ad 7390 if (s1->seqid == s2->seqid)
36281caa 7391 return true;
2d2f24ad 7392 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7393 return true;
7394
7395 return false;
7396}
7397
557134a3
AA		 7398#endif /* CONFIG_NFS_V4_1 */
7399
36281caa
TM		 7400static bool nfs4_match_stateid(const nfs4_stateid *s1,
7401 const nfs4_stateid *s2)
7402{
f597c537 7403 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7404}
7405
7406
17280175 7407static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7408 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7409 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7410 .recover_open = nfs4_open_reclaim,
7411 .recover_lock = nfs4_lock_reclaim,
591d71cb 7412 .establish_clid = nfs4_init_clientid,
05f4c350 7413 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7414};
7415
591d71cb 7416#if defined(CONFIG_NFS_V4_1)
17280175 7417static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7418 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7419 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7420 .recover_open = nfs4_open_reclaim,
7421 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7422 .establish_clid = nfs41_init_clientid,
fce5c838 7423 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7424 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7425};
7426#endif /* CONFIG_NFS_V4_1 */
7427
17280175 7428static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7429 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7430 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7431 .recover_open = nfs4_open_expired,
7432 .recover_lock = nfs4_lock_expired,
7433 .establish_clid = nfs4_init_clientid,
7434};
7435
7436#if defined(CONFIG_NFS_V4_1)
17280175 7437static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7438 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7439 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7440 .recover_open = nfs41_open_expired,
7441 .recover_lock = nfs41_lock_expired,
4d643d1d 7442 .establish_clid = nfs41_init_clientid,
1da177e4 7443};
591d71cb 7444#endif /* CONFIG_NFS_V4_1 */
1da177e4 7445
17280175 7446static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7447 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7448 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7449 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7450};
7451
7452#if defined(CONFIG_NFS_V4_1)
17280175 7453static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7454 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7455 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7456 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7457};
7458#endif
7459
97dc1359
TM		 7460static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7461 .minor_version = 0,
39c6daae
TM		 7462 .init_caps = NFS_CAP_READDIRPLUS
7463 | NFS_CAP_ATOMIC_OPEN
7464 | NFS_CAP_CHANGE_ATTR
7465 | NFS_CAP_POSIX_LOCK,
97dc1359 7466 .call_sync = _nfs4_call_sync,
36281caa 7467 .match_stateid = nfs4_match_stateid,
fca78d6d 7468 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7469 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7470 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7471 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7472 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7473};
7474
7475#if defined(CONFIG_NFS_V4_1)
7476static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7477 .minor_version = 1,
39c6daae
TM		 7478 .init_caps = NFS_CAP_READDIRPLUS
7479 | NFS_CAP_ATOMIC_OPEN
7480 | NFS_CAP_CHANGE_ATTR
3b66486c 7481 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7482 | NFS_CAP_STATEID_NFSV41
7483 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7484 .call_sync = nfs4_call_sync_sequence,
36281caa 7485 .match_stateid = nfs41_match_stateid,
fca78d6d 7486 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7487 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7488 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7489 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7490 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7491};
7492#endif
7493
42c2c424
SD		 7494#if defined(CONFIG_NFS_V4_2)
7495static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7496 .minor_version = 2,
7017310a
BS		 7497 .init_caps = NFS_CAP_READDIRPLUS
7498 | NFS_CAP_ATOMIC_OPEN
7499 | NFS_CAP_CHANGE_ATTR
7500 | NFS_CAP_POSIX_LOCK
7501 | NFS_CAP_STATEID_NFSV41
7502 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7503 .call_sync = nfs4_call_sync_sequence,
7504 .match_stateid = nfs41_match_stateid,
7505 .find_root_sec = nfs41_find_root_sec,
7017310a 7506 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7507 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7508 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7509 .state_renewal_ops = &nfs41_state_renewal_ops,
7510};
7511#endif
7512
97dc1359
TM		 7513const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7514 [0] = &nfs_v4_0_minor_ops,
7515#if defined(CONFIG_NFS_V4_1)
7516 [1] = &nfs_v4_1_minor_ops,
7517#endif
42c2c424
SD		 7518#if defined(CONFIG_NFS_V4_2)
7519 [2] = &nfs_v4_2_minor_ops,
7520#endif
97dc1359
TM		 7521};
7522
17f26b12 7523static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7524 .create = nfs_create,
7525 .lookup = nfs_lookup,
7526 .atomic_open = nfs_atomic_open,
7527 .link = nfs_link,
7528 .unlink = nfs_unlink,
7529 .symlink = nfs_symlink,
7530 .mkdir = nfs_mkdir,
7531 .rmdir = nfs_rmdir,
7532 .mknod = nfs_mknod,
7533 .rename = nfs_rename,
7534 .permission = nfs_permission,
7535 .getattr = nfs_getattr,
7536 .setattr = nfs_setattr,
7537 .getxattr = generic_getxattr,
7538 .setxattr = generic_setxattr,
7539 .listxattr = generic_listxattr,
7540 .removexattr = generic_removexattr,
7541};
7542
92e1d5be 7543static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7544 .permission = nfs_permission,
7545 .getattr = nfs_getattr,
7546 .setattr = nfs_setattr,
64c2ce8b
AK		 7547 .getxattr = generic_getxattr,
7548 .setxattr = generic_setxattr,
7549 .listxattr = generic_listxattr,
7550 .removexattr = generic_removexattr,
6b3b5496
BF		 7551};
7552
509de811 7553const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7554 .version = 4, /* protocol version */
7555 .dentry_ops = &nfs4_dentry_operations,
7556 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7557 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7558 .file_ops = &nfs4_file_operations,
1da177e4 7559 .getroot = nfs4_proc_get_root,
281cad46 7560 .submount = nfs4_submount,
ff9099f2 7561 .try_mount = nfs4_try_mount,
1da177e4
LT		 7562 .getattr = nfs4_proc_getattr,
7563 .setattr = nfs4_proc_setattr,
7564 .lookup = nfs4_proc_lookup,
7565 .access = nfs4_proc_access,
7566 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7567 .create = nfs4_proc_create,
7568 .remove = nfs4_proc_remove,
7569 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7570 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7571 .unlink_done = nfs4_proc_unlink_done,
7572 .rename = nfs4_proc_rename,
d3d4152a 7573 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7574 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7575 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7576 .link = nfs4_proc_link,
7577 .symlink = nfs4_proc_symlink,
7578 .mkdir = nfs4_proc_mkdir,
7579 .rmdir = nfs4_proc_remove,
7580 .readdir = nfs4_proc_readdir,
7581 .mknod = nfs4_proc_mknod,
7582 .statfs = nfs4_proc_statfs,
7583 .fsinfo = nfs4_proc_fsinfo,
7584 .pathconf = nfs4_proc_pathconf,
e9326dca 7585 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7586 .decode_dirent = nfs4_decode_dirent,
7587 .read_setup = nfs4_proc_read_setup,
1abb5088 7588 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7589 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7590 .read_done = nfs4_read_done,
1da177e4 7591 .write_setup = nfs4_proc_write_setup,
57208fa7 7592 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7593 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7594 .write_done = nfs4_write_done,
1da177e4 7595 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7596 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7597 .commit_done = nfs4_commit_done,
1da177e4 7598 .lock = nfs4_proc_lock,
e50a1c2e 7599 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7600 .close_context = nfs4_close_context,
2b484297 7601 .open_context = nfs4_atomic_open,
011e2a7f 7602 .have_delegation = nfs4_have_delegation,
57ec14c5 7603 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7604 .alloc_client = nfs4_alloc_client,
45a52a02 7605 .init_client = nfs4_init_client,
cdb7eced 7606 .free_client = nfs4_free_client,
1179acc6
BS		 7607 .create_server = nfs4_create_server,
7608 .clone_server = nfs_clone_server,
1da177e4
LT		 7609};
7610
64c2ce8b
AK		 7611static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7612 .prefix = XATTR_NAME_NFSV4_ACL,
7613 .list = nfs4_xattr_list_nfs4_acl,
7614 .get = nfs4_xattr_get_nfs4_acl,
7615 .set = nfs4_xattr_set_nfs4_acl,
7616};
7617
7618const struct xattr_handler *nfs4_xattr_handlers[] = {
7619 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7620#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7621 &nfs4_xattr_nfs4_label_handler,
7622#endif
64c2ce8b
AK		 7623 NULL
7624};
7625
1da177e4
LT		 7626/*
7627 * Local variables:
7628 * c-basic-offset: 8
7629 * End:
7630 */
Linux 6.x block layer and io_uring tree(s)