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