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NFSv4.1: Add tracepoints for debugging slot table 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
2f92ae34 511 trace_nfs4_sequence_done(session, res);
691daf3b 512 /* Check the SEQUENCE operation status */
14516c3a
TM		 513 switch (res->sr_status) {
514 case 0:
b0df806c 515 /* Update the slot's sequence and clientid lease timer */
933602e3 516 ++slot->seq_nr;
e3725ec0 517 clp = session->clp;
8e63b6a8 518 do_renew_lease(clp, res->sr_timestamp);
0629e370 519 /* Check sequence flags */
b4410c2f
TM		 520 if (res->sr_status_flags != 0)
521 nfs4_schedule_lease_recovery(clp);
464ee9f9 522 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 523 break;
ac20d163
TM		 524 case 1:
525 /*
526 * sr_status remains 1 if an RPC level error occurred.
527 * The server may or may not have processed the sequence
528 * operation..
529 * Mark the slot as having hosted an interrupted RPC call.
530 */
531 slot->interrupted = 1;
532 goto out;
14516c3a
TM		 533 case -NFS4ERR_DELAY:
534 /* The server detected a resend of the RPC call and
535 * returned NFS4ERR_DELAY as per Section 2.10.6.2
536 * of RFC5661.
537 */
df2fabff 538 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 539 __func__,
df2fabff 540 slot->slot_nr,
933602e3 541 slot->seq_nr);
14516c3a 542 goto out_retry;
85563073
TM		 543 case -NFS4ERR_BADSLOT:
544 /*
545 * The slot id we used was probably retired. Try again
546 * using a different slot id.
547 */
e8794440
TM		 548 goto retry_nowait;
549 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 550 /*
551 * Was the last operation on this sequence interrupted?
552 * If so, retry after bumping the sequence number.
553 */
554 if (interrupted) {
555 ++slot->seq_nr;
556 goto retry_nowait;
557 }
e8794440
TM		 558 /*
559 * Could this slot have been previously retired?
560 * If so, then the server may be expecting seq_nr = 1!
561 */
8e63b6a8
TM		 562 if (slot->seq_nr != 1) {
563 slot->seq_nr = 1;
564 goto retry_nowait;
565 }
566 break;
e8794440
TM		 567 case -NFS4ERR_SEQ_FALSE_RETRY:
568 ++slot->seq_nr;
569 goto retry_nowait;
14516c3a
TM		 570 default:
571 /* Just update the slot sequence no. */
933602e3 572 ++slot->seq_nr;
b0df806c
AA		 573 }
574out:
575 /* The session may be reset by one of the error handlers. */
576 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 577 nfs41_sequence_free_slot(res);
85563073 578 return ret;
e8794440
TM		 579retry_nowait:
580 if (rpc_restart_call_prepare(task)) {
581 task->tk_status = 0;
582 ret = 0;
583 }
584 goto out;
14516c3a 585out_retry:
d05dd4e9 586 if (!rpc_restart_call(task))
14516c3a
TM		 587 goto out;
588 rpc_delay(task, NFS4_POLL_RETRY_MAX);
589 return 0;
b0df806c
AA		 590}
591
14516c3a
TM		 592static int nfs4_sequence_done(struct rpc_task *task,
593 struct nfs4_sequence_res *res)
df896455 594{
e3725ec0 595 if (res->sr_slot == NULL)
14516c3a
TM		 596 return 1;
597 return nfs41_sequence_done(task, res);
df896455
TM		 598}
599
9d12b216
TM		 600static void nfs41_init_sequence(struct nfs4_sequence_args *args,
601 struct nfs4_sequence_res *res, int cache_reply)
602{
2b2fa717 603 args->sa_slot = NULL;
9d12b216 604 args->sa_cache_this = 0;
8fe72bac 605 args->sa_privileged = 0;
9d12b216
TM		 606 if (cache_reply)
607 args->sa_cache_this = 1;
9d12b216
TM		 608 res->sr_slot = NULL;
609}
610
8fe72bac
TM		 611static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
612{
613 args->sa_privileged = 1;
614}
615
dc70d7b3 616int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
ce5039c1
AA		 619 struct rpc_task *task)
620{
fbcd4abc
AA		 621 struct nfs4_slot *slot;
622 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 623
624 dprintk("--> %s\n", __func__);
ce5039c1 625 /* slot already allocated? */
dfb4f309 626 if (res->sr_slot != NULL)
d9afbd1b 627 goto out_success;
ce5039c1 628
fbcd4abc
AA		 629 tbl = &session->fc_slot_table;
630
69d206b5
TM		 631 task->tk_timeout = 0;
632
fbcd4abc 633 spin_lock(&tbl->slot_tbl_lock);
774d5f14 634 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 635 !args->sa_privileged) {
0b1c8fc4 636 /* The state manager will wait until the slot table is empty */
0b1c8fc4 637 dprintk("%s session is draining\n", __func__);
7b939a3f 638 goto out_sleep;
689cf5c1
AB		 639 }
640
2dc03b7f 641 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 642 if (IS_ERR(slot)) {
643 /* If out of memory, try again in 1/4 second */
644 if (slot == ERR_PTR(-ENOMEM))
645 task->tk_timeout = HZ >> 2;
fbcd4abc 646 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 647 goto out_sleep;
fbcd4abc
AA		 648 }
649 spin_unlock(&tbl->slot_tbl_lock);
650
2b2fa717 651 args->sa_slot = slot;
fbcd4abc 652
2dc03b7f
TM		 653 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
654 slot->slot_nr, slot->seq_nr);
fbcd4abc 655
dfb4f309 656 res->sr_slot = slot;
8e63b6a8 657 res->sr_timestamp = jiffies;
2a6e26cd 658 res->sr_status_flags = 0;
fbcd4abc
AA		 659 /*
660 * sr_status is only set in decode_sequence, and so will remain
661 * set to 1 if an rpc level failure occurs.
662 */
663 res->sr_status = 1;
2f92ae34 664 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 665out_success:
666 rpc_call_start(task);
ce5039c1 667 return 0;
7b939a3f 668out_sleep:
8fe72bac
TM		 669 /* Privileged tasks are queued with top priority */
670 if (args->sa_privileged)
1e1093c7
TM		 671 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
672 NULL, RPC_PRIORITY_PRIVILEGED);
673 else
674 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 675 spin_unlock(&tbl->slot_tbl_lock);
676 return -EAGAIN;
ce5039c1 677}
dc70d7b3 678EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 679
035168ab 680int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
ce5039c1
AA		 683 struct rpc_task *task)
684{
035168ab 685 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 686 int ret = 0;
687
d9afbd1b
TM		 688 if (session == NULL) {
689 rpc_call_start(task);
035168ab 690 goto out;
d9afbd1b 691 }
035168ab 692
df2fabff 693 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 694 __func__, session->clp, session, res->sr_slot ?
df2fabff 695 res->sr_slot->slot_nr : -1);
ce5039c1 696
9d12b216 697 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 698out:
699 dprintk("<-- %s status=%d\n", __func__, ret);
700 return ret;
701}
702
703struct nfs41_call_sync_data {
035168ab 704 const struct nfs_server *seq_server;
ce5039c1
AA		 705 struct nfs4_sequence_args *seq_args;
706 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 707};
708
709static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
710{
711 struct nfs41_call_sync_data *data = calldata;
6ba7db34 712 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 713
035168ab
TM		 714 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
715
d9afbd1b 716 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 717}
718
69ab40c4
AA		 719static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
720{
721 struct nfs41_call_sync_data *data = calldata;
722
14516c3a 723 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 724}
725
17280175 726static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 727 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 728 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 729};
730
7c513058
BS		 731static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
732 struct nfs_server *server,
ce5039c1
AA		 733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
8fe72bac 735 struct nfs4_sequence_res *res)
ce5039c1
AA		 736{
737 int ret;
738 struct rpc_task *task;
739 struct nfs41_call_sync_data data = {
035168ab 740 .seq_server = server,
ce5039c1
AA		 741 .seq_args = args,
742 .seq_res = res,
ce5039c1
AA		 743 };
744 struct rpc_task_setup task_setup = {
7c513058 745 .rpc_client = clnt,
ce5039c1
AA		 746 .rpc_message = msg,
747 .callback_ops = &nfs41_call_sync_ops,
748 .callback_data = &data
749 };
750
ce5039c1
AA		 751 task = rpc_run_task(&task_setup);
752 if (IS_ERR(task))
753 ret = PTR_ERR(task);
754 else {
755 ret = task->tk_status;
756 rpc_put_task(task);
757 }
758 return ret;
759}
760
df896455 761#else
8fe72bac 762static
9d12b216
TM		 763void nfs41_init_sequence(struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res, int cache_reply)
765{
766}
767
8fe72bac
TM		 768static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
769{
770}
771
772
14516c3a
TM		 773static int nfs4_sequence_done(struct rpc_task *task,
774 struct nfs4_sequence_res *res)
df896455 775{
14516c3a 776 return 1;
df896455 777}
cccef3b9
AA		 778#endif /* CONFIG_NFS_V4_1 */
779
fd0c0953 780static
7c513058
BS		 781int _nfs4_call_sync(struct rpc_clnt *clnt,
782 struct nfs_server *server,
cccef3b9
AA		 783 struct rpc_message *msg,
784 struct nfs4_sequence_args *args,
fd0c0953 785 struct nfs4_sequence_res *res)
cccef3b9 786{
7c513058 787 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 788}
789
fd0c0953 790static
7c513058
BS		 791int nfs4_call_sync(struct rpc_clnt *clnt,
792 struct nfs_server *server,
e73b83f2
BS		 793 struct rpc_message *msg,
794 struct nfs4_sequence_args *args,
795 struct nfs4_sequence_res *res,
796 int cache_reply)
797{
fd0c0953 798 nfs41_init_sequence(args, res, cache_reply);
7c513058 799 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 800 args, res);
e73b83f2 801}
cccef3b9 802
38478b24 803static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 804{
38478b24 805 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 806
38478b24 807 spin_lock(&dir->i_lock);
359d7d1c 808 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 809 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 810 nfs_force_lookup_revalidate(dir);
a9a4a87a 811 dir->i_version = cinfo->after;
de242c0b 812 nfs_fscache_invalidate(dir);
38478b24 813 spin_unlock(&dir->i_lock);
1da177e4
LT		 814}
815
e56e0b78 816struct nfs4_opendata {
c6d00e63 817 struct kref kref;
e56e0b78
TM		 818 struct nfs_openargs o_arg;
819 struct nfs_openres o_res;
cdd4e68b
TM		 820 struct nfs_open_confirmargs c_arg;
821 struct nfs_open_confirmres c_res;
6926afd1
TM		 822 struct nfs4_string owner_name;
823 struct nfs4_string group_name;
e56e0b78 824 struct nfs_fattr f_attr;
1775fd3e 825 struct nfs4_label *f_label;
e56e0b78 826 struct dentry *dir;
82a2c1b7 827 struct dentry *dentry;
e56e0b78 828 struct nfs4_state_owner *owner;
aac00a8d 829 struct nfs4_state *state;
e56e0b78 830 struct iattr attrs;
26e976a8 831 unsigned long timestamp;
3e309914 832 unsigned int rpc_done : 1;
bdeca1b7 833 unsigned int is_recover : 1;
24ac23ab
TM		 834 int rpc_status;
835 int cancelled;
e56e0b78
TM		 836};
837
49f9a0fa
TM		 838static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
839 int err, struct nfs4_exception *exception)
840{
841 if (err != -EINVAL)
842 return false;
843 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
844 return false;
845 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
846 exception->retry = 1;
847 return true;
848}
849
850static enum open_claim_type4
851nfs4_map_atomic_open_claim(struct nfs_server *server,
852 enum open_claim_type4 claim)
853{
854 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
855 return claim;
856 switch (claim) {
857 default:
858 return claim;
859 case NFS4_OPEN_CLAIM_FH:
860 return NFS4_OPEN_CLAIM_NULL;
861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
862 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
863 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
864 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
865 }
866}
2ced46c2
TM		 867
868static void nfs4_init_opendata_res(struct nfs4_opendata *p)
869{
870 p->o_res.f_attr = &p->f_attr;
1775fd3e 871 p->o_res.f_label = p->f_label;
c1d51931
TM		 872 p->o_res.seqid = p->o_arg.seqid;
873 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 874 p->o_res.server = p->o_arg.server;
5f657530 875 p->o_res.access_request = p->o_arg.access;
2ced46c2 876 nfs_fattr_init(&p->f_attr);
6926afd1 877 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 878}
879
82a2c1b7 880static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 881 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 882 const struct iattr *attrs,
1775fd3e 883 struct nfs4_label *label,
4a1c0893 884 enum open_claim_type4 claim,
8535b2be 885 gfp_t gfp_mask)
e56e0b78 886{
82a2c1b7 887 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 888 struct inode *dir = parent->d_inode;
889 struct nfs_server *server = NFS_SERVER(dir);
890 struct nfs4_opendata *p;
891
8535b2be 892 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 893 if (p == NULL)
894 goto err;
14c43f76
DQ		 895
896 p->f_label = nfs4_label_alloc(server, gfp_mask);
897 if (IS_ERR(p->f_label))
898 goto err_free_p;
899
8535b2be 900 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 901 if (p->o_arg.seqid == NULL)
14c43f76 902 goto err_free_label;
82a2c1b7
AV		 903 nfs_sb_active(dentry->d_sb);
904 p->dentry = dget(dentry);
e56e0b78
TM		 905 p->dir = parent;
906 p->owner = sp;
907 atomic_inc(&sp->so_count);
dc0b027d
TM		 908 p->o_arg.open_flags = flags;
909 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 910 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
911 * will return permission denied for all bits until close */
912 if (!(flags & O_EXCL)) {
913 /* ask server to check for all possible rights as results
914 * are cached */
915 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
916 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 917 }
7539bbab 918 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 919 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
920 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 921 p->o_arg.name = &dentry->d_name;
e56e0b78 922 p->o_arg.server = server;
aa9c2669 923 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 924 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 925 p->o_arg.label = label;
49f9a0fa
TM		 926 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
927 switch (p->o_arg.claim) {
4a1c0893
TM		 928 case NFS4_OPEN_CLAIM_NULL:
929 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
930 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
931 p->o_arg.fh = NFS_FH(dir);
932 break;
933 case NFS4_OPEN_CLAIM_PREVIOUS:
934 case NFS4_OPEN_CLAIM_FH:
935 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
936 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
937 p->o_arg.fh = NFS_FH(dentry->d_inode);
938 }
536e43d1 939 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 940 __u32 verf[2];
d77d76ff 941
e56e0b78
TM		 942 p->o_arg.u.attrs = &p->attrs;
943 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 944
945 verf[0] = jiffies;
946 verf[1] = current->pid;
947 memcpy(p->o_arg.u.verifier.data, verf,
948 sizeof(p->o_arg.u.verifier.data));
e56e0b78 949 }
cdd4e68b
TM		 950 p->c_arg.fh = &p->o_res.fh;
951 p->c_arg.stateid = &p->o_res.stateid;
952 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 953 nfs4_init_opendata_res(p);
c6d00e63 954 kref_init(&p->kref);
e56e0b78 955 return p;
14c43f76
DQ		 956
957err_free_label:
958 nfs4_label_free(p->f_label);
959err_free_p:
e56e0b78
TM		 960 kfree(p);
961err:
962 dput(parent);
963 return NULL;
964}
965
c6d00e63 966static void nfs4_opendata_free(struct kref *kref)
e56e0b78 967{
c6d00e63
TM		 968 struct nfs4_opendata *p = container_of(kref,
969 struct nfs4_opendata, kref);
82a2c1b7 970 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 971
972 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 973 if (p->state != NULL)
974 nfs4_put_open_state(p->state);
c6d00e63 975 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 976
977 nfs4_label_free(p->f_label);
978
c6d00e63 979 dput(p->dir);
82a2c1b7
AV		 980 dput(p->dentry);
981 nfs_sb_deactive(sb);
6926afd1 982 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 983 kfree(p);
984}
985
986static void nfs4_opendata_put(struct nfs4_opendata *p)
987{
988 if (p != NULL)
989 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 990}
991
06f814a3
TM		 992static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
993{
06f814a3
TM		 994 int ret;
995
06f814a3 996 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 997 return ret;
998}
999
dc0b027d 1000static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1001{
1002 int ret = 0;
dc0b027d 1003
536e43d1 1004 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1005 goto out;
1006 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1007 case FMODE_READ:
88069f77
TM		 1008 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1009 && state->n_rdonly != 0;
6ee41268
TM		 1010 break;
1011 case FMODE_WRITE:
88069f77
TM		 1012 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1013 && state->n_wronly != 0;
6ee41268
TM		 1014 break;
1015 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1016 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1017 && state->n_rdwr != 0;
6ee41268 1018 }
dc0b027d 1019out:
6ee41268
TM		 1020 return ret;
1021}
1022
dc0b027d 1023static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1024{
652f89f6
TM		 1025 if (delegation == NULL)
1026 return 0;
dc0b027d 1027 if ((delegation->type & fmode) != fmode)
aac00a8d 1028 return 0;
15c831bf 1029 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1030 return 0;
d25be546
TM		 1031 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1032 return 0;
b7391f44 1033 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1034 return 1;
1035}
1036
dc0b027d 1037static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1038{
dc0b027d 1039 switch (fmode) {
e7616923
TM		 1040 case FMODE_WRITE:
1041 state->n_wronly++;
1042 break;
1043 case FMODE_READ:
1044 state->n_rdonly++;
1045 break;
1046 case FMODE_READ|FMODE_WRITE:
1047 state->n_rdwr++;
1048 }
dc0b027d 1049 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1050}
1051
dc0b027d 1052static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1053{
1054 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1055 nfs4_stateid_copy(&state->stateid, stateid);
1056 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1057 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1058 switch (fmode) {
003707c7
TM		 1059 case FMODE_READ:
1060 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1061 break;
1062 case FMODE_WRITE:
1063 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1064 break;
1065 case FMODE_READ|FMODE_WRITE:
1066 set_bit(NFS_O_RDWR_STATE, &state->flags);
1067 }
e7616923
TM		 1068}
1069
dc0b027d 1070static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1071{
8bda4e4c 1072 write_seqlock(&state->seqlock);
dc0b027d 1073 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1074 write_sequnlock(&state->seqlock);
003707c7
TM		 1075}
1076
dc0b027d 1077static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1078{
8bda4e4c
TM		 1079 /*
1080 * Protect the call to nfs4_state_set_mode_locked and
1081 * serialise the stateid update
1082 */
1083 write_seqlock(&state->seqlock);
003707c7 1084 if (deleg_stateid != NULL) {
f597c537 1085 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1086 set_bit(NFS_DELEGATED_STATE, &state->flags);
1087 }
1088 if (open_stateid != NULL)
dc0b027d 1089 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1090 write_sequnlock(&state->seqlock);
1091 spin_lock(&state->owner->so_lock);
dc0b027d 1092 update_open_stateflags(state, fmode);
ec073428 1093 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1094}
1095
dc0b027d 1096static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1097{
1098 struct nfs_inode *nfsi = NFS_I(state->inode);
1099 struct nfs_delegation *deleg_cur;
1100 int ret = 0;
1101
dc0b027d 1102 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1103
1104 rcu_read_lock();
1105 deleg_cur = rcu_dereference(nfsi->delegation);
1106 if (deleg_cur == NULL)
1107 goto no_delegation;
1108
1109 spin_lock(&deleg_cur->lock);
17f26b12 1110 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1111 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1112 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1113 goto no_delegation_unlock;
1114
1115 if (delegation == NULL)
1116 delegation = &deleg_cur->stateid;
f597c537 1117 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1118 goto no_delegation_unlock;
1119
b7391f44 1120 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1121 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1122 ret = 1;
1123no_delegation_unlock:
1124 spin_unlock(&deleg_cur->lock);
1125no_delegation:
1126 rcu_read_unlock();
1127
1128 if (!ret && open_stateid != NULL) {
dc0b027d 1129 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1130 ret = 1;
1131 }
1132
1133 return ret;
1134}
1135
1136
dc0b027d 1137static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1138{
1139 struct nfs_delegation *delegation;
1140
1141 rcu_read_lock();
1142 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1143 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1144 rcu_read_unlock();
1145 return;
1146 }
1147 rcu_read_unlock();
57ec14c5 1148 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1149}
1150
6ee41268 1151static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1152{
1153 struct nfs4_state *state = opendata->state;
1154 struct nfs_inode *nfsi = NFS_I(state->inode);
1155 struct nfs_delegation *delegation;
f448badd 1156 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1157 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1158 nfs4_stateid stateid;
1159 int ret = -EAGAIN;
1160
aac00a8d 1161 for (;;) {
dc0b027d 1162 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1163 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1164 if (can_open_cached(state, fmode, open_mode)) {
1165 update_open_stateflags(state, fmode);
6ee41268 1166 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1167 goto out_return_state;
1168 }
1169 spin_unlock(&state->owner->so_lock);
1170 }
34310430
TM		 1171 rcu_read_lock();
1172 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1173 if (!can_open_delegated(delegation, fmode)) {
34310430 1174 rcu_read_unlock();
aac00a8d 1175 break;
34310430 1176 }
aac00a8d 1177 /* Save the delegation */
f597c537 1178 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1179 rcu_read_unlock();
fa332941 1180 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1181 if (!opendata->is_recover) {
1182 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1183 if (ret != 0)
1184 goto out;
1185 }
aac00a8d 1186 ret = -EAGAIN;
34310430
TM		 1187
1188 /* Try to update the stateid using the delegation */
dc0b027d 1189 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1190 goto out_return_state;
aac00a8d 1191 }
aac00a8d
TM		 1192out:
1193 return ERR_PTR(ret);
1194out_return_state:
1195 atomic_inc(&state->count);
1196 return state;
1197}
1198
e23008ec
AA		 1199static void
1200nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1201{
1202 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1203 struct nfs_delegation *delegation;
1204 int delegation_flags = 0;
1205
1206 rcu_read_lock();
1207 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1208 if (delegation)
1209 delegation_flags = delegation->flags;
1210 rcu_read_unlock();
1211 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1212 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1213 "returning a delegation for "
1214 "OPEN(CLAIM_DELEGATE_CUR)\n",
1215 clp->cl_hostname);
1216 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1217 nfs_inode_set_delegation(state->inode,
1218 data->owner->so_cred,
1219 &data->o_res);
1220 else
1221 nfs_inode_reclaim_delegation(state->inode,
1222 data->owner->so_cred,
1223 &data->o_res);
1224}
1225
1226/*
1227 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1228 * and update the nfs4_state.
1229 */
1230static struct nfs4_state *
1231_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1232{
1233 struct inode *inode = data->state->inode;
1234 struct nfs4_state *state = data->state;
1235 int ret;
1236
1237 if (!data->rpc_done) {
1238 ret = data->rpc_status;
1239 goto err;
1240 }
1241
1242 ret = -ESTALE;
1243 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1244 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1245 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1246 goto err;
1247
1248 ret = -ENOMEM;
1249 state = nfs4_get_open_state(inode, data->owner);
1250 if (state == NULL)
1251 goto err;
1252
1253 ret = nfs_refresh_inode(inode, &data->f_attr);
1254 if (ret)
1255 goto err;
1256
aa9c2669
DQ		 1257 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1258
e23008ec
AA		 1259 if (data->o_res.delegation_type != 0)
1260 nfs4_opendata_check_deleg(data, state);
1261 update_open_stateid(state, &data->o_res.stateid, NULL,
1262 data->o_arg.fmode);
1263
1264 return state;
1265err:
1266 return ERR_PTR(ret);
1267
1268}
1269
1270static struct nfs4_state *
1271_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1272{
1273 struct inode *inode;
1274 struct nfs4_state *state = NULL;
1b370bc2 1275 int ret;
24ac23ab 1276
aac00a8d 1277 if (!data->rpc_done) {
6ee41268 1278 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1279 goto out;
1280 }
1281
1b370bc2 1282 ret = -EAGAIN;
24ac23ab 1283 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1284 goto err;
1775fd3e 1285 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1286 ret = PTR_ERR(inode);
03f28e3a 1287 if (IS_ERR(inode))
1b370bc2
TM		 1288 goto err;
1289 ret = -ENOMEM;
24ac23ab
TM		 1290 state = nfs4_get_open_state(inode, data->owner);
1291 if (state == NULL)
1b370bc2 1292 goto err_put_inode;
e23008ec
AA		 1293 if (data->o_res.delegation_type != 0)
1294 nfs4_opendata_check_deleg(data, state);
34310430 1295 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1296 data->o_arg.fmode);
24ac23ab 1297 iput(inode);
aac00a8d 1298out:
7aa262b5 1299 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1300 return state;
1b370bc2
TM		 1301err_put_inode:
1302 iput(inode);
1303err:
1304 return ERR_PTR(ret);
24ac23ab
TM		 1305}
1306
e23008ec
AA		 1307static struct nfs4_state *
1308nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1309{
1310 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1311 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1312 return _nfs4_opendata_to_nfs4_state(data);
1313}
1314
864472e9
TM		 1315static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1316{
1317 struct nfs_inode *nfsi = NFS_I(state->inode);
1318 struct nfs_open_context *ctx;
1319
1320 spin_lock(&state->inode->i_lock);
1321 list_for_each_entry(ctx, &nfsi->open_files, list) {
1322 if (ctx->state != state)
1323 continue;
1324 get_nfs_open_context(ctx);
1325 spin_unlock(&state->inode->i_lock);
1326 return ctx;
1327 }
1328 spin_unlock(&state->inode->i_lock);
1329 return ERR_PTR(-ENOENT);
1330}
1331
4a1c0893
TM		 1332static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1333 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1334{
1335 struct nfs4_opendata *opendata;
1336
4a1c0893 1337 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1338 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1339 if (opendata == NULL)
1340 return ERR_PTR(-ENOMEM);
1341 opendata->state = state;
1342 atomic_inc(&state->count);
1343 return opendata;
1344}
1345
dc0b027d 1346static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1347{
2ced46c2 1348 struct nfs4_state *newstate;
864472e9
TM		 1349 int ret;
1350
dc0b027d
TM		 1351 opendata->o_arg.open_flags = 0;
1352 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1353 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1354 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1355 nfs4_init_opendata_res(opendata);
b257957e 1356 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1357 if (ret != 0)
1358 return ret;
2ced46c2 1359 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1360 if (IS_ERR(newstate))
1361 return PTR_ERR(newstate);
643168c2 1362 nfs4_close_state(newstate, fmode);
2ced46c2 1363 *res = newstate;
864472e9
TM		 1364 return 0;
1365}
1366
1367static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1368{
864472e9 1369 struct nfs4_state *newstate;
864472e9
TM		 1370 int ret;
1371
1372 /* memory barrier prior to reading state->n_* */
2ced46c2 1373 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1374 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1375 smp_rmb();
1376 if (state->n_rdwr != 0) {
b0ed9dbc 1377 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1378 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1379 if (ret != 0)
1380 return ret;
2ced46c2
TM		 1381 if (newstate != state)
1382 return -ESTALE;
864472e9
TM		 1383 }
1384 if (state->n_wronly != 0) {
b0ed9dbc 1385 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1386 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1387 if (ret != 0)
1388 return ret;
2ced46c2
TM		 1389 if (newstate != state)
1390 return -ESTALE;
864472e9
TM		 1391 }
1392 if (state->n_rdonly != 0) {
b0ed9dbc 1393 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1394 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1395 if (ret != 0)
1396 return ret;
2ced46c2
TM		 1397 if (newstate != state)
1398 return -ESTALE;
864472e9 1399 }
1ac7e2fd
TM		 1400 /*
1401 * We may have performed cached opens for all three recoveries.
1402 * Check if we need to update the current stateid.
1403 */
1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1405 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1406 write_seqlock(&state->seqlock);
1ac7e2fd 1407 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1408 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1409 write_sequnlock(&state->seqlock);
1ac7e2fd 1410 }
864472e9
TM		 1411 return 0;
1412}
1413
1da177e4
LT		 1414/*
1415 * OPEN_RECLAIM:
1416 * reclaim state on the server after a reboot.
1da177e4 1417 */
539cd03a 1418static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1419{
1ac7e2fd 1420 struct nfs_delegation *delegation;
864472e9 1421 struct nfs4_opendata *opendata;
dc0b027d 1422 fmode_t delegation_type = 0;
1da177e4
LT		 1423 int status;
1424
4a1c0893
TM		 1425 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1426 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1427 if (IS_ERR(opendata))
1428 return PTR_ERR(opendata);
1ac7e2fd
TM		 1429 rcu_read_lock();
1430 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1431 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1432 delegation_type = delegation->type;
1ac7e2fd 1433 rcu_read_unlock();
864472e9
TM		 1434 opendata->o_arg.u.delegation_type = delegation_type;
1435 status = nfs4_open_recover(opendata, state);
c6d00e63 1436 nfs4_opendata_put(opendata);
1da177e4
LT		 1437 return status;
1438}
1439
539cd03a 1440static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1441{
1442 struct nfs_server *server = NFS_SERVER(state->inode);
1443 struct nfs4_exception exception = { };
1444 int err;
1445 do {
539cd03a 1446 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1447 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1448 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1449 continue;
168667c4 1450 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1451 break;
1452 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1453 } while (exception.retry);
1454 return err;
1455}
1456
864472e9
TM		 1457static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1458{
1459 struct nfs_open_context *ctx;
1460 int ret;
1461
1462 ctx = nfs4_state_find_open_context(state);
1463 if (IS_ERR(ctx))
91876b13 1464 return -EAGAIN;
539cd03a 1465 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1466 put_nfs_open_context(ctx);
1467 return ret;
1468}
1469
db4f2e63 1470static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1471{
be76b5b6
TM		 1472 switch (err) {
1473 default:
1474 printk(KERN_ERR "NFS: %s: unhandled error "
1475 "%d.\n", __func__, err);
1476 case 0:
1477 case -ENOENT:
1478 case -ESTALE:
1479 break;
1480 case -NFS4ERR_BADSESSION:
1481 case -NFS4ERR_BADSLOT:
1482 case -NFS4ERR_BAD_HIGH_SLOT:
1483 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1484 case -NFS4ERR_DEADSESSION:
1485 set_bit(NFS_DELEGATED_STATE, &state->flags);
1486 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1487 return -EAGAIN;
1488 case -NFS4ERR_STALE_CLIENTID:
1489 case -NFS4ERR_STALE_STATEID:
1490 set_bit(NFS_DELEGATED_STATE, &state->flags);
1491 case -NFS4ERR_EXPIRED:
1492 /* Don't recall a delegation if it was lost */
1493 nfs4_schedule_lease_recovery(server->nfs_client);
1494 return -EAGAIN;
1495 case -NFS4ERR_DELEG_REVOKED:
1496 case -NFS4ERR_ADMIN_REVOKED:
1497 case -NFS4ERR_BAD_STATEID:
db4f2e63 1498 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1499 nfs_inode_find_state_and_recover(state->inode,
1500 stateid);
1501 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1502 return 0;
1503 case -NFS4ERR_DELAY:
1504 case -NFS4ERR_GRACE:
1505 set_bit(NFS_DELEGATED_STATE, &state->flags);
1506 ssleep(1);
1507 return -EAGAIN;
db4f2e63
TM		 1508 case -ENOMEM:
1509 case -NFS4ERR_DENIED:
1510 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1511 return 0;
be76b5b6 1512 }
1da177e4
LT		 1513 return err;
1514}
1515
db4f2e63
TM		 1516int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1517{
1518 struct nfs_server *server = NFS_SERVER(state->inode);
1519 struct nfs4_opendata *opendata;
1520 int err;
1521
1522 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1523 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1524 if (IS_ERR(opendata))
1525 return PTR_ERR(opendata);
1526 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1527 err = nfs4_open_recover(opendata, state);
1528 nfs4_opendata_put(opendata);
1529 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1530}
1531
cdd4e68b
TM		 1532static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1533{
1534 struct nfs4_opendata *data = calldata;
1535
1536 data->rpc_status = task->tk_status;
26e976a8 1537 if (data->rpc_status == 0) {
f597c537 1538 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1539 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1540 renew_lease(data->o_res.server, data->timestamp);
3e309914 1541 data->rpc_done = 1;
26e976a8 1542 }
cdd4e68b
TM		 1543}
1544
1545static void nfs4_open_confirm_release(void *calldata)
1546{
1547 struct nfs4_opendata *data = calldata;
1548 struct nfs4_state *state = NULL;
1549
1550 /* If this request hasn't been cancelled, do nothing */
1551 if (data->cancelled == 0)
1552 goto out_free;
1553 /* In case of error, no cleanup! */
3e309914 1554 if (!data->rpc_done)
cdd4e68b 1555 goto out_free;
cdd4e68b 1556 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1557 if (!IS_ERR(state))
643168c2 1558 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1559out_free:
c6d00e63 1560 nfs4_opendata_put(data);
cdd4e68b
TM		 1561}
1562
1563static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1564 .rpc_call_done = nfs4_open_confirm_done,
1565 .rpc_release = nfs4_open_confirm_release,
1566};
1567
1568/*
1569 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1570 */
1571static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1572{
1573 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1574 struct rpc_task *task;
5138fde0
TM		 1575 struct rpc_message msg = {
1576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1577 .rpc_argp = &data->c_arg,
1578 .rpc_resp = &data->c_res,
1579 .rpc_cred = data->owner->so_cred,
1580 };
c970aa85
TM		 1581 struct rpc_task_setup task_setup_data = {
1582 .rpc_client = server->client,
5138fde0 1583 .rpc_message = &msg,
c970aa85
TM		 1584 .callback_ops = &nfs4_open_confirm_ops,
1585 .callback_data = data,
101070ca 1586 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1587 .flags = RPC_TASK_ASYNC,
1588 };
1da177e4
LT		 1589 int status;
1590
c6d00e63 1591 kref_get(&data->kref);
3e309914
TM		 1592 data->rpc_done = 0;
1593 data->rpc_status = 0;
5138fde0 1594 data->timestamp = jiffies;
c970aa85 1595 task = rpc_run_task(&task_setup_data);
7a1218a2 1596 if (IS_ERR(task))
cdd4e68b 1597 return PTR_ERR(task);
cdd4e68b
TM		 1598 status = nfs4_wait_for_completion_rpc_task(task);
1599 if (status != 0) {
1600 data->cancelled = 1;
1601 smp_wmb();
1602 } else
1603 status = data->rpc_status;
e6b3c4db 1604 rpc_put_task(task);
1da177e4
LT		 1605 return status;
1606}
1607
24ac23ab 1608static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1609{
24ac23ab
TM		 1610 struct nfs4_opendata *data = calldata;
1611 struct nfs4_state_owner *sp = data->owner;
549b19cc 1612 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1613
24ac23ab 1614 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1615 goto out_wait;
aac00a8d
TM		 1616 /*
1617 * Check if we still need to send an OPEN call, or if we can use
1618 * a delegation instead.
1619 */
1620 if (data->state != NULL) {
1621 struct nfs_delegation *delegation;
1622
dc0b027d 1623 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1624 goto out_no_action;
aac00a8d
TM		 1625 rcu_read_lock();
1626 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1627 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1628 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1629 can_open_delegated(delegation, data->o_arg.fmode))
1630 goto unlock_no_action;
aac00a8d
TM		 1631 rcu_read_unlock();
1632 }
95b72eb0 1633 /* Update client id. */
549b19cc 1634 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1635 switch (data->o_arg.claim) {
1636 case NFS4_OPEN_CLAIM_PREVIOUS:
1637 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1638 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1639 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1640 case NFS4_OPEN_CLAIM_FH:
1641 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1642 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1643 }
26e976a8 1644 data->timestamp = jiffies;
035168ab 1645 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1646 &data->o_arg.seq_args,
2240a9e2
TM		 1647 &data->o_res.seq_res,
1648 task) != 0)
1649 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1650
1651 /* Set the create mode (note dependency on the session type) */
1652 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1653 if (data->o_arg.open_flags & O_EXCL) {
1654 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1655 if (nfs4_has_persistent_session(clp))
1656 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1657 else if (clp->cl_mvops->minor_version > 0)
1658 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1659 }
6ee41268 1660 return;
652f89f6
TM		 1661unlock_no_action:
1662 rcu_read_unlock();
6ee41268
TM		 1663out_no_action:
1664 task->tk_action = NULL;
c8da19b9 1665out_wait:
b75ad4cd 1666 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1667}
1668
24ac23ab
TM		 1669static void nfs4_open_done(struct rpc_task *task, void *calldata)
1670{
1671 struct nfs4_opendata *data = calldata;
1da177e4 1672
24ac23ab 1673 data->rpc_status = task->tk_status;
d898528c 1674
14516c3a
TM		 1675 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1676 return;
d898528c 1677
24ac23ab 1678 if (task->tk_status == 0) {
807d66d8
TM		 1679 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1680 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1681 case S_IFREG:
1682 break;
1683 case S_IFLNK:
24ac23ab 1684 data->rpc_status = -ELOOP;
6f926b5b
TM		 1685 break;
1686 case S_IFDIR:
24ac23ab 1687 data->rpc_status = -EISDIR;
6f926b5b
TM		 1688 break;
1689 default:
24ac23ab 1690 data->rpc_status = -ENOTDIR;
807d66d8 1691 }
6f926b5b 1692 }
26e976a8 1693 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1694 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1695 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1696 }
3e309914 1697 data->rpc_done = 1;
24ac23ab 1698}
6f926b5b 1699
24ac23ab
TM		 1700static void nfs4_open_release(void *calldata)
1701{
1702 struct nfs4_opendata *data = calldata;
1703 struct nfs4_state *state = NULL;
1704
1705 /* If this request hasn't been cancelled, do nothing */
1706 if (data->cancelled == 0)
1707 goto out_free;
1708 /* In case of error, no cleanup! */
3e309914 1709 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1710 goto out_free;
1711 /* In case we need an open_confirm, no cleanup! */
1712 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1713 goto out_free;
24ac23ab 1714 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1715 if (!IS_ERR(state))
643168c2 1716 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1717out_free:
c6d00e63 1718 nfs4_opendata_put(data);
24ac23ab
TM		 1719}
1720
1721static const struct rpc_call_ops nfs4_open_ops = {
1722 .rpc_call_prepare = nfs4_open_prepare,
1723 .rpc_call_done = nfs4_open_done,
1724 .rpc_release = nfs4_open_release,
1725};
1726
b257957e 1727static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1728{
1729 struct inode *dir = data->dir->d_inode;
1730 struct nfs_server *server = NFS_SERVER(dir);
1731 struct nfs_openargs *o_arg = &data->o_arg;
1732 struct nfs_openres *o_res = &data->o_res;
1733 struct rpc_task *task;
5138fde0
TM		 1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1736 .rpc_argp = o_arg,
1737 .rpc_resp = o_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
c970aa85
TM		 1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
5138fde0 1742 .rpc_message = &msg,
c970aa85
TM		 1743 .callback_ops = &nfs4_open_ops,
1744 .callback_data = data,
101070ca 1745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1746 .flags = RPC_TASK_ASYNC,
1747 };
24ac23ab
TM		 1748 int status;
1749
9d12b216 1750 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1751 kref_get(&data->kref);
3e309914
TM		 1752 data->rpc_done = 0;
1753 data->rpc_status = 0;
2ced46c2 1754 data->cancelled = 0;
bdeca1b7
TM		 1755 data->is_recover = 0;
1756 if (isrecover) {
8fe72bac 1757 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1758 data->is_recover = 1;
1759 }
c970aa85 1760 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1761 if (IS_ERR(task))
1762 return PTR_ERR(task);
1763 status = nfs4_wait_for_completion_rpc_task(task);
1764 if (status != 0) {
1765 data->cancelled = 1;
1766 smp_wmb();
1767 } else
1768 status = data->rpc_status;
1769 rpc_put_task(task);
1770
1771 return status;
1772}
1773
1774static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1775{
1776 struct inode *dir = data->dir->d_inode;
1777 struct nfs_openres *o_res = &data->o_res;
1778 int status;
1779
1780 status = nfs4_run_open_task(data, 1);
1781 if (status != 0 || !data->rpc_done)
1782 return status;
1783
6926afd1
TM		 1784 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1785
b257957e
AB		 1786 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1787 status = _nfs4_proc_open_confirm(data);
1788 if (status != 0)
1789 return status;
1790 }
1791
1792 return status;
1793}
1794
6168f62c
WAA		 1795static int nfs4_opendata_access(struct rpc_cred *cred,
1796 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1797 struct nfs4_state *state, fmode_t fmode,
1798 int openflags)
6168f62c
WAA		 1799{
1800 struct nfs_access_entry cache;
1801 u32 mask;
1802
1803 /* access call failed or for some reason the server doesn't
1804 * support any access modes -- defer access call until later */
1805 if (opendata->o_res.access_supported == 0)
1806 return 0;
1807
1808 mask = 0;
bbd3a8ee 1809 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1810 * write mode bits, but POSIX allows the creating process to write.
1811 * use openflags to check for exec, because fmode won't
1812 * always have FMODE_EXEC set when file open for exec. */
1813 if (openflags & __FMODE_EXEC) {
1814 /* ONLY check for exec rights */
1815 mask = MAY_EXEC;
1816 } else if (fmode & FMODE_READ)
1817 mask = MAY_READ;
6168f62c
WAA		 1818
1819 cache.cred = cred;
1820 cache.jiffies = jiffies;
1821 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1822 nfs_access_add_cache(state->inode, &cache);
1823
bbd3a8ee 1824 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1825 return 0;
1826
1827 /* even though OPEN succeeded, access is denied. Close the file */
1828 nfs4_close_state(state, fmode);
998f40b5 1829 return -EACCES;
6168f62c
WAA		 1830}
1831
b257957e
AB		 1832/*
1833 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1834 */
1835static int _nfs4_proc_open(struct nfs4_opendata *data)
1836{
1837 struct inode *dir = data->dir->d_inode;
1838 struct nfs_server *server = NFS_SERVER(dir);
1839 struct nfs_openargs *o_arg = &data->o_arg;
1840 struct nfs_openres *o_res = &data->o_res;
1841 int status;
1842
1843 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1844 if (!data->rpc_done)
1845 return status;
1846 if (status != 0) {
1847 if (status == -NFS4ERR_BADNAME &&
1848 !(o_arg->open_flags & O_CREAT))
1849 return -ENOENT;
24ac23ab 1850 return status;
08ef7bd3 1851 }
24ac23ab 1852
6926afd1
TM		 1853 nfs_fattr_map_and_free_names(server, &data->f_attr);
1854
90ff0c54 1855 if (o_arg->open_flags & O_CREAT)
56ae19f3 1856 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1857 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1858 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1859 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1860 status = _nfs4_proc_open_confirm(data);
1da177e4 1861 if (status != 0)
24ac23ab 1862 return status;
1da177e4
LT		 1863 }
1864 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1865 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1866 return 0;
1da177e4
LT		 1867}
1868
d83217c1
AA		 1869static int nfs4_recover_expired_lease(struct nfs_server *server)
1870{
1871 return nfs4_client_recover_expired_lease(server->nfs_client);
1872}
1873
1da177e4
LT		 1874/*
1875 * OPEN_EXPIRED:
1876 * reclaim state on the server after a network partition.
1877 * Assumes caller holds the appropriate lock
1878 */
539cd03a 1879static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1880{
e56e0b78 1881 struct nfs4_opendata *opendata;
864472e9 1882 int ret;
1da177e4 1883
4a1c0893 1884 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1885 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1886 if (IS_ERR(opendata))
1887 return PTR_ERR(opendata);
864472e9 1888 ret = nfs4_open_recover(opendata, state);
35d05778 1889 if (ret == -ESTALE)
3d4ff43d 1890 d_drop(ctx->dentry);
c6d00e63 1891 nfs4_opendata_put(opendata);
864472e9 1892 return ret;
1da177e4
LT		 1893}
1894
a9ed2e25 1895static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1896{
539cd03a 1897 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1898 struct nfs4_exception exception = { };
1899 int err;
1900
1901 do {
539cd03a 1902 err = _nfs4_open_expired(ctx, state);
42113a75 1903 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1904 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1905 continue;
a9ed2e25
TM		 1906 switch (err) {
1907 default:
1908 goto out;
1909 case -NFS4ERR_GRACE:
1910 case -NFS4ERR_DELAY:
1911 nfs4_handle_exception(server, err, &exception);
1912 err = 0;
1913 }
202b50dc 1914 } while (exception.retry);
a9ed2e25 1915out:
202b50dc
TM		 1916 return err;
1917}
1918
1da177e4
LT		 1919static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1920{
1da177e4 1921 struct nfs_open_context *ctx;
864472e9 1922 int ret;
1da177e4 1923
864472e9
TM		 1924 ctx = nfs4_state_find_open_context(state);
1925 if (IS_ERR(ctx))
91876b13 1926 return -EAGAIN;
539cd03a 1927 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1928 put_nfs_open_context(ctx);
1929 return ret;
1da177e4
LT		 1930}
1931
f062eb6c 1932#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1933static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1934{
f062eb6c 1935 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1936 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1937 struct nfs_delegation *delegation;
1938 struct rpc_cred *cred = NULL;
1939 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1940
1941 /* If a state reset has been done, test_stateid is unneeded */
1942 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1943 return;
1944
ab7cb0df
TM		 1945 /* Get the delegation credential for use by test/free_stateid */
1946 rcu_read_lock();
1947 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1948 if (delegation != NULL &&
1949 nfs4_stateid_match(&delegation->stateid, stateid)) {
1950 cred = get_rpccred(delegation->cred);
1951 rcu_read_unlock();
1952 status = nfs41_test_stateid(server, stateid, cred);
1953 } else
1954 rcu_read_unlock();
1955
3e60ffdd
CL		 1956 if (status != NFS_OK) {
1957 /* Free the stateid unless the server explicitly
1958 * informs us the stateid is unrecognized. */
1959 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1960 nfs41_free_stateid(server, stateid, cred);
6938867e 1961 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1962
6938867e
BS		 1963 write_seqlock(&state->seqlock);
1964 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1965 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1966 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1967 }
ab7cb0df
TM		 1968
1969 if (cred != NULL)
1970 put_rpccred(cred);
3e60ffdd
CL		 1971}
1972
1973/**
1974 * nfs41_check_open_stateid - possibly free an open stateid
1975 *
1976 * @state: NFSv4 state for an inode
1977 *
1978 * Returns NFS_OK if recovery for this stateid is now finished.
1979 * Otherwise a negative NFS4ERR value is returned.
1980 */
1981static int nfs41_check_open_stateid(struct nfs4_state *state)
1982{
1983 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1984 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1985 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1986 int status;
1987
1988 /* If a state reset has been done, test_stateid is unneeded */
1989 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1990 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1991 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1992 return -NFS4ERR_BAD_STATEID;
1993
ab7cb0df 1994 status = nfs41_test_stateid(server, stateid, cred);
3e60ffdd
CL		 1995 if (status != NFS_OK) {
1996 /* Free the stateid unless the server explicitly
1997 * informs us the stateid is unrecognized. */
1998 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1999 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2000
2001 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2002 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2003 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2004 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2005 }
2006 return status;
2007}
2008
2009static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2010{
eb64cf96 2011 int status;
b01dd1d8 2012
3e60ffdd
CL		 2013 nfs41_clear_delegation_stateid(state);
2014 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2015 if (status != NFS_OK)
2016 status = nfs4_open_expired(sp, state);
2017 return status;
f062eb6c
BS		 2018}
2019#endif
2020
aa53ed54
JL		 2021/*
2022 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2023 * fields corresponding to attributes that were used to store the verifier.
2024 * Make sure we clobber those fields in the later setattr call
2025 */
2026static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2027{
2028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2029 !(sattr->ia_valid & ATTR_ATIME_SET))
2030 sattr->ia_valid |= ATTR_ATIME;
2031
2032 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2033 !(sattr->ia_valid & ATTR_MTIME_SET))
2034 sattr->ia_valid |= ATTR_MTIME;
2035}
2036
c21443c2
TM		 2037static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2038 fmode_t fmode,
2039 int flags,
3efb9722 2040 struct nfs_open_context *ctx)
c21443c2
TM		 2041{
2042 struct nfs4_state_owner *sp = opendata->owner;
2043 struct nfs_server *server = sp->so_server;
275bb307 2044 struct dentry *dentry;
c21443c2
TM		 2045 struct nfs4_state *state;
2046 unsigned int seq;
2047 int ret;
2048
2049 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2050
2051 ret = _nfs4_proc_open(opendata);
2052 if (ret != 0)
2053 goto out;
2054
2055 state = nfs4_opendata_to_nfs4_state(opendata);
2056 ret = PTR_ERR(state);
2057 if (IS_ERR(state))
2058 goto out;
2059 if (server->caps & NFS_CAP_POSIX_LOCK)
2060 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2061
275bb307
TM		 2062 dentry = opendata->dentry;
2063 if (dentry->d_inode == NULL) {
2064 /* FIXME: Is this d_drop() ever needed? */
2065 d_drop(dentry);
2066 dentry = d_add_unique(dentry, igrab(state->inode));
2067 if (dentry == NULL) {
2068 dentry = opendata->dentry;
2069 } else if (dentry != ctx->dentry) {
2070 dput(ctx->dentry);
2071 ctx->dentry = dget(dentry);
2072 }
2073 nfs_set_verifier(dentry,
2074 nfs_save_change_attribute(opendata->dir->d_inode));
2075 }
2076
c21443c2
TM		 2077 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2078 if (ret != 0)
2079 goto out;
2080
3efb9722 2081 ctx->state = state;
c45ffdd2
TM		 2082 if (dentry->d_inode == state->inode) {
2083 nfs_inode_attach_open_context(ctx);
2084 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2085 nfs4_schedule_stateid_recovery(server, state);
2086 }
c21443c2
TM		 2087out:
2088 return ret;
2089}
2090
1da177e4 2091/*
24ac23ab 2092 * Returns a referenced nfs4_state
1da177e4 2093 */
82be417a 2094static int _nfs4_do_open(struct inode *dir,
4197a055 2095 struct nfs_open_context *ctx,
82be417a
AA		 2096 int flags,
2097 struct iattr *sattr,
959d921f 2098 struct nfs4_label *label)
1da177e4
LT		 2099{
2100 struct nfs4_state_owner *sp;
2101 struct nfs4_state *state = NULL;
2102 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2103 struct nfs4_opendata *opendata;
4197a055
TM		 2104 struct dentry *dentry = ctx->dentry;
2105 struct rpc_cred *cred = ctx->cred;
2106 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2107 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2108 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2109 struct nfs4_label *olabel = NULL;
aac00a8d 2110 int status;
1da177e4
LT		 2111
2112 /* Protect against reboot recovery conflicts */
1da177e4 2113 status = -ENOMEM;
d1e284d5
TM		 2114 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2115 if (sp == NULL) {
1da177e4
LT		 2116 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2117 goto out_err;
2118 }
58d9714a
TM		 2119 status = nfs4_recover_expired_lease(server);
2120 if (status != 0)
b4454fe1 2121 goto err_put_state_owner;
82a2c1b7
AV		 2122 if (dentry->d_inode != NULL)
2123 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2124 status = -ENOMEM;
49f9a0fa
TM		 2125 if (dentry->d_inode)
2126 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2127 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2128 label, claim, GFP_KERNEL);
e56e0b78 2129 if (opendata == NULL)
95d35cb4 2130 goto err_put_state_owner;
1da177e4 2131
14c43f76
DQ		 2132 if (label) {
2133 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2134 if (IS_ERR(olabel)) {
2135 status = PTR_ERR(olabel);
2136 goto err_opendata_put;
2137 }
2138 }
2139
82be417a
AA		 2140 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2141 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2142 if (!opendata->f_attr.mdsthreshold)
14c43f76 2143 goto err_free_label;
1549210f 2144 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2145 }
82a2c1b7
AV		 2146 if (dentry->d_inode != NULL)
2147 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2148
3efb9722 2149 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2150 if (status != 0)
14c43f76 2151 goto err_free_label;
3efb9722 2152 state = ctx->state;
6168f62c 2153
549b19cc
TM		 2154 if ((opendata->o_arg.open_flags & O_EXCL) &&
2155 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2156 nfs4_exclusive_attrset(opendata, sattr);
2157
2158 nfs_fattr_init(opendata->o_res.f_attr);
2159 status = nfs4_do_setattr(state->inode, cred,
2160 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2161 state, label, olabel);
2162 if (status == 0) {
0ab64e0e 2163 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2164 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2165 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2166 }
0ab64e0e 2167 }
82be417a
AA		 2168
2169 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2170 *ctx_th = opendata->f_attr.mdsthreshold;
2171 else
2172 kfree(opendata->f_attr.mdsthreshold);
2173 opendata->f_attr.mdsthreshold = NULL;
2174
14c43f76
DQ		 2175 nfs4_label_free(olabel);
2176
c6d00e63 2177 nfs4_opendata_put(opendata);
1da177e4 2178 nfs4_put_state_owner(sp);
1da177e4 2179 return 0;
14c43f76
DQ		 2180err_free_label:
2181 nfs4_label_free(olabel);
c6d00e63 2182err_opendata_put:
82be417a 2183 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2184 nfs4_opendata_put(opendata);
e56e0b78
TM		 2185err_put_state_owner:
2186 nfs4_put_state_owner(sp);
1da177e4 2187out_err:
1da177e4
LT		 2188 return status;
2189}
2190
2191
82be417a 2192static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2193 struct nfs_open_context *ctx,
82be417a
AA		 2194 int flags,
2195 struct iattr *sattr,
959d921f 2196 struct nfs4_label *label)
1da177e4 2197{
49f9a0fa 2198 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2199 struct nfs4_exception exception = { };
2200 struct nfs4_state *res;
2201 int status;
2202
2203 do {
959d921f 2204 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2205 res = ctx->state;
42113a75 2206 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2207 if (status == 0)
2208 break;
2209 /* NOTE: BAD_SEQID means the server and client disagree about the
2210 * book-keeping w.r.t. state-changing operations
2211 * (OPEN/CLOSE/LOCK/LOCKU...)
2212 * It is actually a sign of a bug on the client or on the server.
2213 *
2214 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2215 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2216 * have unhashed the old state_owner for us, and that we can
2217 * therefore safely retry using a new one. We should still warn
2218 * the user though...
2219 */
2220 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2221 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2222 " returned a bad sequence-id error!\n",
2223 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2224 exception.retry = 1;
2225 continue;
2226 }
550f5747
TM		 2227 /*
2228 * BAD_STATEID on OPEN means that the server cancelled our
2229 * state before it received the OPEN_CONFIRM.
2230 * Recover by retrying the request as per the discussion
2231 * on Page 181 of RFC3530.
2232 */
2233 if (status == -NFS4ERR_BAD_STATEID) {
2234 exception.retry = 1;
2235 continue;
2236 }
aac00a8d
TM		 2237 if (status == -EAGAIN) {
2238 /* We must have found a delegation */
2239 exception.retry = 1;
2240 continue;
2241 }
49f9a0fa
TM		 2242 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2243 continue;
2244 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2245 status, &exception));
2246 } while (exception.retry);
2247 return res;
2248}
2249
659bfcd6
TM		 2250static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2251 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2252 struct nfs4_state *state, struct nfs4_label *ilabel,
2253 struct nfs4_label *olabel)
1da177e4 2254{
3e4f6290 2255 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2256 struct nfs_setattrargs arg = {
3e4f6290 2257 .fh = NFS_FH(inode),
1da177e4
LT		 2258 .iap = sattr,
2259 .server = server,
2260 .bitmask = server->attr_bitmask,
1775fd3e 2261 .label = ilabel,
1da177e4
LT		 2262 };
2263 struct nfs_setattrres res = {
2264 .fattr = fattr,
1775fd3e 2265 .label = olabel,
1da177e4
LT		 2266 .server = server,
2267 };
2268 struct rpc_message msg = {
659bfcd6
TM		 2269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2270 .rpc_argp = &arg,
2271 .rpc_resp = &res,
2272 .rpc_cred = cred,
1da177e4 2273 };
26e976a8 2274 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2275 fmode_t fmode;
2276 bool truncate;
65e4308d 2277 int status;
1da177e4 2278
aa9c2669
DQ		 2279 arg.bitmask = nfs4_bitmask(server, ilabel);
2280 if (ilabel)
2281 arg.bitmask = nfs4_bitmask(server, olabel);
2282
0e574af1 2283 nfs_fattr_init(fattr);
1da177e4 2284
ee3ae84e
TM		 2285 /* Servers should only apply open mode checks for file size changes */
2286 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2287 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2288
2289 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2290 /* Use that stateid */
2291 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2292 struct nfs_lockowner lockowner = {
2293 .l_owner = current->files,
2294 .l_pid = current->tgid,
2295 };
4fc8796d 2296 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2297 &lockowner);
08e9eac4 2298 } else
f597c537 2299 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2300
7c513058 2301 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2302 if (status == 0 && state != NULL)
2303 renew_lease(server, timestamp);
65e4308d 2304 return status;
1da177e4
LT		 2305}
2306
659bfcd6
TM		 2307static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2308 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2309 struct nfs4_state *state, struct nfs4_label *ilabel,
2310 struct nfs4_label *olabel)
1da177e4 2311{
3e4f6290 2312 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2313 struct nfs4_exception exception = {
2314 .state = state,
3114ea7a 2315 .inode = inode,
a1d0b5ee 2316 };
1da177e4
LT		 2317 int err;
2318 do {
1775fd3e 2319 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2320 trace_nfs4_setattr(inode, err);
451146be
TM		 2321 switch (err) {
2322 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2323 if (!(sattr->ia_valid & ATTR_SIZE)) {
2324 pr_warn_once("NFSv4: server %s is incorrectly "
2325 "applying open mode checks to "
2326 "a SETATTR that is not "
2327 "changing file size.\n",
2328 server->nfs_client->cl_hostname);
2329 }
451146be
TM		 2330 if (state && !(state->state & FMODE_WRITE)) {
2331 err = -EBADF;
2332 if (sattr->ia_valid & ATTR_OPEN)
2333 err = -EACCES;
2334 goto out;
2335 }
2336 }
2337 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2338 } while (exception.retry);
451146be 2339out:
1da177e4
LT		 2340 return err;
2341}
2342
2343struct nfs4_closedata {
2344 struct inode *inode;
2345 struct nfs4_state *state;
2346 struct nfs_closeargs arg;
2347 struct nfs_closeres res;
516a6af6 2348 struct nfs_fattr fattr;
26e976a8 2349 unsigned long timestamp;
f7e8917a
FI		 2350 bool roc;
2351 u32 roc_barrier;
1da177e4
LT		 2352};
2353
963d8fe5 2354static void nfs4_free_closedata(void *data)
9512135d 2355{
963d8fe5
TM		 2356 struct nfs4_closedata *calldata = data;
2357 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2358 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2359
f7e8917a
FI		 2360 if (calldata->roc)
2361 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2362 nfs4_put_open_state(calldata->state);
2363 nfs_free_seqid(calldata->arg.seqid);
9512135d 2364 nfs4_put_state_owner(sp);
322b2b90 2365 nfs_sb_deactive(sb);
9512135d
TM		 2366 kfree(calldata);
2367}
2368
88069f77
TM		 2369static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2370 fmode_t fmode)
2371{
2372 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2373 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2374 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2375 case FMODE_WRITE:
88069f77 2376 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2377 break;
2378 case FMODE_READ:
88069f77 2379 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2380 break;
2381 case 0:
2382 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2383 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2384 clear_bit(NFS_OPEN_STATE, &state->flags);
2385 }
88069f77
TM		 2386 spin_unlock(&state->owner->so_lock);
2387}
2388
963d8fe5 2389static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2390{
963d8fe5 2391 struct nfs4_closedata *calldata = data;
1da177e4 2392 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2393 struct nfs_server *server = NFS_SERVER(calldata->inode);
2394
a3ca5651 2395 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2396 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2397 return;
42113a75 2398 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2399 /* hmm. we are done with the inode, and in the process of freeing
2400 * the state_owner. we keep this around to process errors
2401 */
1da177e4
LT		 2402 switch (task->tk_status) {
2403 case 0:
f7e8917a
FI		 2404 if (calldata->roc)
2405 pnfs_roc_set_barrier(state->inode,
2406 calldata->roc_barrier);
45328c35 2407 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2408 renew_lease(server, calldata->timestamp);
88069f77
TM		 2409 nfs4_close_clear_stateid_flags(state,
2410 calldata->arg.fmode);
1da177e4
LT		 2411 break;
2412 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2413 case -NFS4ERR_OLD_STATEID:
2414 case -NFS4ERR_BAD_STATEID:
1da177e4 2415 case -NFS4ERR_EXPIRED:
dc0b027d 2416 if (calldata->arg.fmode == 0)
9e33bed5 2417 break;
1da177e4 2418 default:
72211dbe
TM		 2419 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2420 rpc_restart_call_prepare(task);
1da177e4 2421 }
72211dbe 2422 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2423 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2424 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2425}
2426
4ce70ada 2427static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2428{
4ce70ada 2429 struct nfs4_closedata *calldata = data;
9512135d 2430 struct nfs4_state *state = calldata->state;
7fdab069 2431 struct inode *inode = calldata->inode;
88069f77 2432 int call_close = 0;
9512135d 2433
a3ca5651 2434 dprintk("%s: begin!\n", __func__);
963d8fe5 2435 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2436 goto out_wait;
003707c7 2437
88069f77
TM		 2438 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2439 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2440 spin_lock(&state->owner->so_lock);
003707c7 2441 /* Calculate the change in open mode */
e7616923 2442 if (state->n_rdwr == 0) {
003707c7 2443 if (state->n_rdonly == 0) {
88069f77
TM		 2444 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2445 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2446 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2447 }
2448 if (state->n_wronly == 0) {
88069f77
TM		 2449 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2450 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2451 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2452 }
e7616923 2453 }
5d422301
TM		 2454 if (!nfs4_valid_open_stateid(state))
2455 call_close = 0;
4cecb76f 2456 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2457
2458 if (!call_close) {
963d8fe5 2459 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2460 goto out_no_action;
9512135d 2461 }
88069f77 2462
f7e8917a 2463 if (calldata->arg.fmode == 0) {
88069f77 2464 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2465 if (calldata->roc &&
b9536ad5
AA		 2466 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2467 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2468 goto out_wait;
b9536ad5 2469 }
f7e8917a 2470 }
88069f77 2471
516a6af6 2472 nfs_fattr_init(calldata->res.fattr);
26e976a8 2473 calldata->timestamp = jiffies;
7fdab069 2474 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2475 &calldata->arg.seq_args,
2476 &calldata->res.seq_res,
2240a9e2
TM		 2477 task) != 0)
2478 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2479 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2480 return;
2481out_no_action:
2482 task->tk_action = NULL;
2483out_wait:
2484 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2485}
2486
963d8fe5 2487static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2488 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2489 .rpc_call_done = nfs4_close_done,
2490 .rpc_release = nfs4_free_closedata,
2491};
2492
1da177e4
LT		 2493/*
2494 * It is possible for data to be read/written from a mem-mapped file
2495 * after the sys_close call (which hits the vfs layer as a flush).
2496 * This means that we can't safely call nfsv4 close on a file until
2497 * the inode is cleared. This in turn means that we are not good
2498 * NFSv4 citizens - we do not indicate to the server to update the file's
2499 * share state even when we are done with one of the three share
2500 * stateid's in the inode.
2501 *
2502 * NOTE: Caller must be holding the sp->so_owner semaphore!
2503 */
1f7977c1 2504int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2505{
4a35bd41 2506 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2507 struct nfs4_closedata *calldata;
b39e625b
TM		 2508 struct nfs4_state_owner *sp = state->owner;
2509 struct rpc_task *task;
5138fde0
TM		 2510 struct rpc_message msg = {
2511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2512 .rpc_cred = state->owner->so_cred,
2513 };
c970aa85
TM		 2514 struct rpc_task_setup task_setup_data = {
2515 .rpc_client = server->client,
5138fde0 2516 .rpc_message = &msg,
c970aa85 2517 .callback_ops = &nfs4_close_ops,
101070ca 2518 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2519 .flags = RPC_TASK_ASYNC,
2520 };
9512135d 2521 int status = -ENOMEM;
1da177e4 2522
8535b2be 2523 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2524 if (calldata == NULL)
9512135d 2525 goto out;
9d12b216 2526 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2527 calldata->inode = state->inode;
1da177e4 2528 calldata->state = state;
4a35bd41 2529 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2530 calldata->arg.stateid = &state->open_stateid;
1da177e4 2531 /* Serialization for the sequence id */
8535b2be 2532 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2533 if (calldata->arg.seqid == NULL)
2534 goto out_free_calldata;
dc0b027d 2535 calldata->arg.fmode = 0;
a65318bf 2536 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2537 calldata->res.fattr = &calldata->fattr;
c1d51931 2538 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2539 calldata->res.server = server;
1f7977c1 2540 calldata->roc = pnfs_roc(state->inode);
643168c2 2541 nfs_sb_active(calldata->inode->i_sb);
9512135d 2542
1174dd1f
TM		 2543 msg.rpc_argp = &calldata->arg;
2544 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2545 task_setup_data.callback_data = calldata;
2546 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2547 if (IS_ERR(task))
2548 return PTR_ERR(task);
a49c3c77
TM		 2549 status = 0;
2550 if (wait)
2551 status = rpc_wait_for_completion_task(task);
b39e625b 2552 rpc_put_task(task);
a49c3c77 2553 return status;
9512135d
TM		 2554out_free_calldata:
2555 kfree(calldata);
2556out:
b39e625b
TM		 2557 nfs4_put_open_state(state);
2558 nfs4_put_state_owner(sp);
9512135d 2559 return status;
1da177e4
LT		 2560}
2561
2b484297 2562static struct inode *
cd9a1c0e 2563nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2564{
1da177e4 2565 struct nfs4_state *state;
aa9c2669
DQ		 2566 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2567
2568 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2569
565277f6 2570 /* Protect against concurrent sillydeletes */
959d921f 2571 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2572
2573 nfs4_label_release_security(label);
2574
f46e0bd3
TM		 2575 if (IS_ERR(state))
2576 return ERR_CAST(state);
275bb307 2577 return state->inode;
1da177e4
LT		 2578}
2579
1185a552 2580static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2581{
2582 if (ctx->state == NULL)
2583 return;
2584 if (is_sync)
643168c2 2585 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2586 else
643168c2 2587 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2588}
1da177e4
LT		 2589
2590static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2591{
43652ad5
BH		 2592 struct nfs4_server_caps_arg args = {
2593 .fhandle = fhandle,
2594 };
1da177e4
LT		 2595 struct nfs4_server_caps_res res = {};
2596 struct rpc_message msg = {
2597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2598 .rpc_argp = &args,
1da177e4
LT		 2599 .rpc_resp = &res,
2600 };
2601 int status;
2602
7c513058 2603 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2604 if (status == 0) {
2605 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2606 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2607 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2608 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2609 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2610 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2611 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2612 server->caps |= NFS_CAP_ACLS;
2613 if (res.has_links != 0)
2614 server->caps |= NFS_CAP_HARDLINKS;
2615 if (res.has_symlinks != 0)
2616 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2617 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2618 server->caps |= NFS_CAP_FILEID;
2619 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2620 server->caps |= NFS_CAP_MODE;
2621 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2622 server->caps |= NFS_CAP_NLINK;
2623 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2624 server->caps |= NFS_CAP_OWNER;
2625 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2626 server->caps |= NFS_CAP_OWNER_GROUP;
2627 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2628 server->caps |= NFS_CAP_ATIME;
2629 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2630 server->caps |= NFS_CAP_CTIME;
2631 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2632 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2633#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2634 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2635 server->caps |= NFS_CAP_SECURITY_LABEL;
2636#endif
2637 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2638 sizeof(server->attr_bitmask));
62ab460c 2639
aa9c2669
DQ		 2640 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2641 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2642 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2643 }
a65318bf
TM		 2644 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2645 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2646 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2647 server->acl_bitmask = res.acl_bitmask;
264e6351 2648 server->fh_expire_type = res.fh_expire_type;
1da177e4 2649 }
cccef3b9 2650
1da177e4
LT		 2651 return status;
2652}
2653
55a97593 2654int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2655{
2656 struct nfs4_exception exception = { };
2657 int err;
2658 do {
2659 err = nfs4_handle_exception(server,
2660 _nfs4_server_capabilities(server, fhandle),
2661 &exception);
2662 } while (exception.retry);
2663 return err;
2664}
2665
2666static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2667 struct nfs_fsinfo *info)
2668{
aa9c2669 2669 u32 bitmask[3];
1da177e4 2670 struct nfs4_lookup_root_arg args = {
aa9c2669 2671 .bitmask = bitmask,
1da177e4
LT		 2672 };
2673 struct nfs4_lookup_res res = {
2674 .server = server,
0e574af1 2675 .fattr = info->fattr,
1da177e4
LT		 2676 .fh = fhandle,
2677 };
2678 struct rpc_message msg = {
2679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2680 .rpc_argp = &args,
2681 .rpc_resp = &res,
2682 };
008f55d0 2683
aa9c2669
DQ		 2684 bitmask[0] = nfs4_fattr_bitmap[0];
2685 bitmask[1] = nfs4_fattr_bitmap[1];
2686 /*
2687 * Process the label in the upcoming getfattr
2688 */
2689 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2690
0e574af1 2691 nfs_fattr_init(info->fattr);
7c513058 2692 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2693}
2694
2695static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2696 struct nfs_fsinfo *info)
2697{
2698 struct nfs4_exception exception = { };
2699 int err;
2700 do {
fb8a5ba8 2701 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2702 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2703 switch (err) {
2704 case 0:
2705 case -NFS4ERR_WRONGSEC:
05e9cfb4 2706 goto out;
fb8a5ba8
BS		 2707 default:
2708 err = nfs4_handle_exception(server, err, &exception);
2709 }
1da177e4 2710 } while (exception.retry);
05e9cfb4 2711out:
1da177e4
LT		 2712 return err;
2713}
2714
8f70e95f
BS		 2715static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2716 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2717{
2718 struct rpc_auth *auth;
2719 int ret;
2720
2721 auth = rpcauth_create(flavor, server->client);
e8d920c5 2722 if (IS_ERR(auth)) {
75bc8821 2723 ret = -EACCES;
8f70e95f
BS		 2724 goto out;
2725 }
2726 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2727out:
2728 return ret;
2729}
2730
9a744ba3
CL		 2731/*
2732 * Retry pseudoroot lookup with various security flavors. We do this when:
2733 *
2734 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2735 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2736 *
2737 * Returns zero on success, or a negative NFS4ERR value, or a
2738 * negative errno value.
2739 */
801a16dc 2740static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2741 struct nfs_fsinfo *info)
1da177e4 2742{
9a744ba3
CL		 2743 /* Per 3530bis 15.33.5 */
2744 static const rpc_authflavor_t flav_array[] = {
2745 RPC_AUTH_GSS_KRB5P,
2746 RPC_AUTH_GSS_KRB5I,
2747 RPC_AUTH_GSS_KRB5,
c4eafe11 2748 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2749 RPC_AUTH_NULL,
2750 };
2751 int status = -EPERM;
2752 size_t i;
6a1a1e34 2753
9a744ba3 2754 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2755 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2756 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2757 continue;
2758 break;
8f70e95f 2759 }
9a744ba3 2760
fb8a5ba8
BS		 2761 /*
2762 * -EACCESS could mean that the user doesn't have correct permissions
2763 * to access the mount. It could also mean that we tried to mount
2764 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2765 * existing mount programs don't handle -EACCES very well so it should
2766 * be mapped to -EPERM instead.
2767 */
2768 if (status == -EACCES)
2769 status = -EPERM;
801a16dc
BS		 2770 return status;
2771}
2772
2ed4b95b
CL		 2773static int nfs4_do_find_root_sec(struct nfs_server *server,
2774 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2775{
2776 int mv = server->nfs_client->cl_minorversion;
2777 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2778}
2779
2780/**
2781 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2782 * @server: initialized nfs_server handle
2783 * @fhandle: we fill in the pseudo-fs root file handle
2784 * @info: we fill in an FSINFO struct
2785 *
2786 * Returns zero on success, or a negative errno.
801a16dc 2787 */
3028eb2b
BS		 2788int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2789 struct nfs_fsinfo *info)
801a16dc 2790{
2ed4b95b
CL		 2791 int status;
2792
2793 status = nfs4_lookup_root(server, fhandle, info);
2794 if ((status == -NFS4ERR_WRONGSEC) &&
2795 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2796 status = nfs4_do_find_root_sec(server, fhandle, info);
2797
1da177e4
LT		 2798 if (status == 0)
2799 status = nfs4_server_capabilities(server, fhandle);
2800 if (status == 0)
2801 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2802
c12e87f4 2803 return nfs4_map_errors(status);
1da177e4
LT		 2804}
2805
bae36241
BS		 2806static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2807 struct nfs_fsinfo *info)
2808{
2809 int error;
2810 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2811 struct nfs4_label *label = NULL;
bae36241
BS		 2812
2813 error = nfs4_server_capabilities(server, mntfh);
2814 if (error < 0) {
2815 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2816 return error;
2817 }
2818
14c43f76
DQ		 2819 label = nfs4_label_alloc(server, GFP_KERNEL);
2820 if (IS_ERR(label))
2821 return PTR_ERR(label);
2822
1775fd3e 2823 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2824 if (error < 0) {
2825 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2826 goto err_free_label;
bae36241
BS		 2827 }
2828
2829 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2830 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2831 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2832
14c43f76
DQ		 2833err_free_label:
2834 nfs4_label_free(label);
2835
bae36241
BS		 2836 return error;
2837}
2838
6b97fd3d
MN		 2839/*
2840 * Get locations and (maybe) other attributes of a referral.
2841 * Note that we'll actually follow the referral later when
2842 * we detect fsid mismatch in inode revalidation
2843 */
f05d147f
BS		 2844static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2845 const struct qstr *name, struct nfs_fattr *fattr,
2846 struct nfs_fh *fhandle)
6b97fd3d
MN		 2847{
2848 int status = -ENOMEM;
2849 struct page *page = NULL;
2850 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2851
2852 page = alloc_page(GFP_KERNEL);
2853 if (page == NULL)
2854 goto out;
2855 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2856 if (locations == NULL)
2857 goto out;
2858
f05d147f 2859 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2860 if (status != 0)
2861 goto out;
2862 /* Make sure server returned a different fsid for the referral */
2863 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2864 dprintk("%s: server did not return a different fsid for"
2865 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2866 status = -EIO;
2867 goto out;
2868 }
533eb461
AA		 2869 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2870 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2871
533eb461 2872 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2873 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2874 memset(fhandle, 0, sizeof(struct nfs_fh));
2875out:
2876 if (page)
2877 __free_page(page);
5d7ca35a 2878 kfree(locations);
6b97fd3d
MN		 2879 return status;
2880}
2881
1775fd3e
DQ		 2882static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2883 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2884{
2885 struct nfs4_getattr_arg args = {
2886 .fh = fhandle,
2887 .bitmask = server->attr_bitmask,
2888 };
2889 struct nfs4_getattr_res res = {
2890 .fattr = fattr,
1775fd3e 2891 .label = label,
1da177e4
LT		 2892 .server = server,
2893 };
2894 struct rpc_message msg = {
2895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2896 .rpc_argp = &args,
2897 .rpc_resp = &res,
2898 };
aa9c2669
DQ		 2899
2900 args.bitmask = nfs4_bitmask(server, label);
2901
0e574af1 2902 nfs_fattr_init(fattr);
7c513058 2903 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2904}
2905
1775fd3e
DQ		 2906static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2907 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2908{
2909 struct nfs4_exception exception = { };
2910 int err;
2911 do {
b5f875a9
TM		 2912 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
2913 trace_nfs4_getattr(server, fhandle, fattr, err);
2914 err = nfs4_handle_exception(server, err,
1da177e4
LT		 2915 &exception);
2916 } while (exception.retry);
2917 return err;
2918}
2919
2920/*
2921 * The file is not closed if it is opened due to the a request to change
2922 * the size of the file. The open call will not be needed once the
2923 * VFS layer lookup-intents are implemented.
2924 *
2925 * Close is called when the inode is destroyed.
2926 * If we haven't opened the file for O_WRONLY, we
2927 * need to in the size_change case to obtain a stateid.
2928 *
2929 * Got race?
2930 * Because OPEN is always done by name in nfsv4, it is
2931 * possible that we opened a different file by the same
2932 * name. We can recognize this race condition, but we
2933 * can't do anything about it besides returning an error.
2934 *
2935 * This will be fixed with VFS changes (lookup-intent).
2936 */
2937static int
2938nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2939 struct iattr *sattr)
2940{
08e9eac4 2941 struct inode *inode = dentry->d_inode;
659bfcd6 2942 struct rpc_cred *cred = NULL;
d530838b 2943 struct nfs4_state *state = NULL;
14c43f76 2944 struct nfs4_label *label = NULL;
1da177e4
LT		 2945 int status;
2946
8a1636c4 2947 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2948 pnfs_commit_and_return_layout(inode);
8a1636c4 2949
0e574af1 2950 nfs_fattr_init(fattr);
1da177e4 2951
2669940d
AA		 2952 /* Deal with open(O_TRUNC) */
2953 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2954 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2955
2956 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2957 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2958 return 0;
2959
d530838b 2960 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2961 if (sattr->ia_valid & ATTR_FILE) {
2962 struct nfs_open_context *ctx;
2963
2964 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2965 if (ctx) {
2966 cred = ctx->cred;
2967 state = ctx->state;
2968 }
659bfcd6 2969 }
08e9eac4 2970
14c43f76
DQ		 2971 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2972 if (IS_ERR(label))
2973 return PTR_ERR(label);
2974
2975 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2976 if (status == 0) {
65e4308d 2977 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2978 nfs_setsecurity(inode, fattr, label);
2979 }
14c43f76 2980 nfs4_label_free(label);
1da177e4
LT		 2981 return status;
2982}
2983
0c2e53f1
TM		 2984static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2985 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2986 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2987{
0c2e53f1 2988 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2989 int status;
2990 struct nfs4_lookup_arg args = {
2991 .bitmask = server->attr_bitmask,
0c2e53f1 2992 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2993 .name = name,
2994 };
2995 struct nfs4_lookup_res res = {
2996 .server = server,
2997 .fattr = fattr,
aa9c2669 2998 .label = label,
2b3de441
DH		 2999 .fh = fhandle,
3000 };
3001 struct rpc_message msg = {
3002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3003 .rpc_argp = &args,
3004 .rpc_resp = &res,
3005 };
3006
aa9c2669
DQ		 3007 args.bitmask = nfs4_bitmask(server, label);
3008
2b3de441
DH		 3009 nfs_fattr_init(fattr);
3010
1da177e4 3011 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3012 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3013 dprintk("NFS reply lookup: %d\n", status);
3014 return status;
3015}
3016
72de53ec 3017static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3018{
7ebb9315 3019 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3020 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3021 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3022 fattr->nlink = 2;
3023}
3024
72de53ec
BS		 3025static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3026 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3027 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3028{
3029 struct nfs4_exception exception = { };
72de53ec 3030 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3031 int err;
3032 do {
1775fd3e 3033 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3034 trace_nfs4_lookup(dir, name, err);
72de53ec 3035 switch (err) {
08ef7bd3 3036 case -NFS4ERR_BADNAME:
72de53ec
BS		 3037 err = -ENOENT;
3038 goto out;
0c2e53f1 3039 case -NFS4ERR_MOVED:
f05d147f 3040 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3041 goto out;
0c2e53f1 3042 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3043 err = -EPERM;
3044 if (client != *clnt)
3045 goto out;
3046
3047 client = nfs4_create_sec_client(client, dir, name);
3048 if (IS_ERR(client))
3049 return PTR_ERR(client);
3050
3051 exception.retry = 1;
3052 break;
3053 default:
3054 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3055 }
1da177e4 3056 } while (exception.retry);
72de53ec
BS		 3057
3058out:
3059 if (err == 0)
3060 *clnt = client;
3061 else if (client != *clnt)
3062 rpc_shutdown_client(client);
3063
1da177e4
LT		 3064 return err;
3065}
3066
80a16b21 3067static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3068 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3069 struct nfs4_label *label)
72de53ec
BS		 3070{
3071 int status;
3072 struct rpc_clnt *client = NFS_CLIENT(dir);
3073
1775fd3e 3074 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3075 if (client != NFS_CLIENT(dir)) {
3076 rpc_shutdown_client(client);
3077 nfs_fixup_secinfo_attributes(fattr);
3078 }
3079 return status;
3080}
3081
f05d147f
BS		 3082struct rpc_clnt *
3083nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3084 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3085{
3086 int status;
3087 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3088
1775fd3e 3089 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3090 if (status < 0) {
3091 rpc_shutdown_client(client);
3092 return ERR_PTR(status);
3093 }
3094 return client;
3095}
3096
1da177e4
LT		 3097static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3098{
76b32999 3099 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3100 struct nfs4_accessargs args = {
3101 .fh = NFS_FH(inode),
a4980e78 3102 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3103 };
3104 struct nfs4_accessres res = {
3105 .server = server,
1da177e4 3106 };
1da177e4
LT		 3107 struct rpc_message msg = {
3108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3109 .rpc_argp = &args,
3110 .rpc_resp = &res,
3111 .rpc_cred = entry->cred,
3112 };
3113 int mode = entry->mask;
aa9c2669 3114 int status = 0;
1da177e4
LT		 3115
3116 /*
3117 * Determine which access bits we want to ask for...
3118 */
3119 if (mode & MAY_READ)
3120 args.access |= NFS4_ACCESS_READ;
3121 if (S_ISDIR(inode->i_mode)) {
3122 if (mode & MAY_WRITE)
3123 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3124 if (mode & MAY_EXEC)
3125 args.access |= NFS4_ACCESS_LOOKUP;
3126 } else {
3127 if (mode & MAY_WRITE)
3128 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3129 if (mode & MAY_EXEC)
3130 args.access |= NFS4_ACCESS_EXECUTE;
3131 }
c407d41a
TM		 3132
3133 res.fattr = nfs_alloc_fattr();
3134 if (res.fattr == NULL)
3135 return -ENOMEM;
3136
7c513058 3137 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3138 if (!status) {
6168f62c 3139 nfs_access_set_mask(entry, res.access);
c407d41a 3140 nfs_refresh_inode(inode, res.fattr);
1da177e4 3141 }
c407d41a 3142 nfs_free_fattr(res.fattr);
1da177e4
LT		 3143 return status;
3144}
3145
3146static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3147{
3148 struct nfs4_exception exception = { };
3149 int err;
3150 do {
c1578b76
TM		 3151 err = _nfs4_proc_access(inode, entry);
3152 trace_nfs4_access(inode, err);
3153 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3154 &exception);
3155 } while (exception.retry);
3156 return err;
3157}
3158
3159/*
3160 * TODO: For the time being, we don't try to get any attributes
3161 * along with any of the zero-copy operations READ, READDIR,
3162 * READLINK, WRITE.
3163 *
3164 * In the case of the first three, we want to put the GETATTR
3165 * after the read-type operation -- this is because it is hard
3166 * to predict the length of a GETATTR response in v4, and thus
3167 * align the READ data correctly. This means that the GETATTR
3168 * may end up partially falling into the page cache, and we should
3169 * shift it into the 'tail' of the xdr_buf before processing.
3170 * To do this efficiently, we need to know the total length
3171 * of data received, which doesn't seem to be available outside
3172 * of the RPC layer.
3173 *
3174 * In the case of WRITE, we also want to put the GETATTR after
3175 * the operation -- in this case because we want to make sure
140150db 3176 * we get the post-operation mtime and size.
1da177e4
LT		 3177 *
3178 * Both of these changes to the XDR layer would in fact be quite
3179 * minor, but I decided to leave them for a subsequent patch.
3180 */
3181static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3182 unsigned int pgbase, unsigned int pglen)
3183{
3184 struct nfs4_readlink args = {
3185 .fh = NFS_FH(inode),
3186 .pgbase = pgbase,
3187 .pglen = pglen,
3188 .pages = &page,
3189 };
f50c7000 3190 struct nfs4_readlink_res res;
1da177e4
LT		 3191 struct rpc_message msg = {
3192 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3193 .rpc_argp = &args,
f50c7000 3194 .rpc_resp = &res,
1da177e4
LT		 3195 };
3196
7c513058 3197 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3198}
3199
3200static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3201 unsigned int pgbase, unsigned int pglen)
3202{
3203 struct nfs4_exception exception = { };
3204 int err;
3205 do {
c1578b76
TM		 3206 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3207 trace_nfs4_readlink(inode, err);
3208 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3209 &exception);
3210 } while (exception.retry);
3211 return err;
3212}
3213
1da177e4 3214/*
8867fe58 3215 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3216 */
1da177e4
LT		 3217static int
3218nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3219 int flags)
1da177e4 3220{
aa9c2669 3221 struct nfs4_label l, *ilabel = NULL;
8867fe58 3222 struct nfs_open_context *ctx;
1da177e4 3223 struct nfs4_state *state;
1da177e4
LT		 3224 int status = 0;
3225
8867fe58
MS		 3226 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3227 if (IS_ERR(ctx))
3228 return PTR_ERR(ctx);
3229
aa9c2669
DQ		 3230 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3231
a8a5da99 3232 sattr->ia_mode &= ~current_umask();
959d921f 3233 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3234 if (IS_ERR(state)) {
3235 status = PTR_ERR(state);
c0204fd2 3236 goto out;
1da177e4 3237 }
1da177e4 3238out:
aa9c2669 3239 nfs4_label_release_security(ilabel);
8867fe58 3240 put_nfs_open_context(ctx);
1da177e4
LT		 3241 return status;
3242}
3243
3244static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3245{
16e42959 3246 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3247 struct nfs_removeargs args = {
1da177e4 3248 .fh = NFS_FH(dir),
26fe5750 3249 .name = *name,
16e42959 3250 };
4fdc17b2 3251 struct nfs_removeres res = {
16e42959 3252 .server = server,
1da177e4 3253 };
1da177e4 3254 struct rpc_message msg = {
4fdc17b2
TM		 3255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3256 .rpc_argp = &args,
3257 .rpc_resp = &res,
1da177e4 3258 };
778d2817 3259 int status;
1da177e4 3260
7c513058 3261 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3262 if (status == 0)
16e42959 3263 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3264 return status;
3265}
3266
3267static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3268{
3269 struct nfs4_exception exception = { };
3270 int err;
3271 do {
078ea3df
TM		 3272 err = _nfs4_proc_remove(dir, name);
3273 trace_nfs4_remove(dir, name, err);
3274 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3275 &exception);
3276 } while (exception.retry);
3277 return err;
3278}
3279
e4eff1a6 3280static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3281{
e4eff1a6
TM		 3282 struct nfs_server *server = NFS_SERVER(dir);
3283 struct nfs_removeargs *args = msg->rpc_argp;
3284 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3285
e4eff1a6 3286 res->server = server;
1da177e4 3287 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3288 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3289
3290 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3291}
3292
34e137cc
BS		 3293static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3294{
d9afbd1b
TM		 3295 nfs4_setup_sequence(NFS_SERVER(data->dir),
3296 &data->args.seq_args,
3297 &data->res.seq_res,
3298 task);
1da177e4
LT		 3299}
3300
e4eff1a6 3301static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3302{
078ea3df
TM		 3303 struct nfs_unlinkdata *data = task->tk_calldata;
3304 struct nfs_removeres *res = &data->res;
e4eff1a6 3305
14516c3a
TM		 3306 if (!nfs4_sequence_done(task, &res->seq_res))
3307 return 0;
9e33bed5 3308 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3309 return 0;
3310 update_changeattr(dir, &res->cinfo);
e4eff1a6 3311 return 1;
1da177e4
LT		 3312}
3313
d3d4152a
JL		 3314static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3315{
3316 struct nfs_server *server = NFS_SERVER(dir);
3317 struct nfs_renameargs *arg = msg->rpc_argp;
3318 struct nfs_renameres *res = msg->rpc_resp;
3319
3320 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3321 res->server = server;
9d12b216 3322 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3323}
3324
c6bfa1a1
BS		 3325static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3326{
d9afbd1b
TM		 3327 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3328 &data->args.seq_args,
3329 &data->res.seq_res,
3330 task);
d3d4152a
JL		 3331}
3332
3333static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3334 struct inode *new_dir)
3335{
fbc6f7c2
TM		 3336 struct nfs_renamedata *data = task->tk_calldata;
3337 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3338
3339 if (!nfs4_sequence_done(task, &res->seq_res))
3340 return 0;
3341 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3342 return 0;
3343
3344 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3345 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3346 return 1;
3347}
3348
1da177e4
LT		 3349static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3350 struct inode *new_dir, struct qstr *new_name)
3351{
6caf2c82 3352 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3353 struct nfs_renameargs arg = {
1da177e4
LT		 3354 .old_dir = NFS_FH(old_dir),
3355 .new_dir = NFS_FH(new_dir),
3356 .old_name = old_name,
3357 .new_name = new_name,
6caf2c82 3358 };
e8582a8b 3359 struct nfs_renameres res = {
6caf2c82 3360 .server = server,
1da177e4 3361 };
1da177e4
LT		 3362 struct rpc_message msg = {
3363 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3364 .rpc_argp = &arg,
3365 .rpc_resp = &res,
3366 };
011fff72 3367 int status = -ENOMEM;
14c43f76 3368
7c513058 3369 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3370 if (!status) {
3371 update_changeattr(old_dir, &res.old_cinfo);
3372 update_changeattr(new_dir, &res.new_cinfo);
3373 }
3374 return status;
3375}
3376
3377static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3378 struct inode *new_dir, struct qstr *new_name)
3379{
3380 struct nfs4_exception exception = { };
3381 int err;
3382 do {
fbc6f7c2
TM		 3383 err = _nfs4_proc_rename(old_dir, old_name,
3384 new_dir, new_name);
3385 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3386 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3387 &exception);
3388 } while (exception.retry);
3389 return err;
3390}
3391
3392static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3393{
91ba2eee 3394 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3395 struct nfs4_link_arg arg = {
3396 .fh = NFS_FH(inode),
3397 .dir_fh = NFS_FH(dir),
3398 .name = name,
91ba2eee
TM		 3399 .bitmask = server->attr_bitmask,
3400 };
91ba2eee
TM		 3401 struct nfs4_link_res res = {
3402 .server = server,
1775fd3e 3403 .label = NULL,
1da177e4 3404 };
1da177e4
LT		 3405 struct rpc_message msg = {
3406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3407 .rpc_argp = &arg,
91ba2eee 3408 .rpc_resp = &res,
1da177e4 3409 };
136f2627
TM		 3410 int status = -ENOMEM;
3411
3412 res.fattr = nfs_alloc_fattr();
778d2817 3413 if (res.fattr == NULL)
136f2627 3414 goto out;
1da177e4 3415
14c43f76
DQ		 3416 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3417 if (IS_ERR(res.label)) {
3418 status = PTR_ERR(res.label);
3419 goto out;
3420 }
aa9c2669 3421 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3422
7c513058 3423 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3424 if (!status) {
3425 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3426 status = nfs_post_op_update_inode(inode, res.fattr);
3427 if (!status)
3428 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3429 }
14c43f76
DQ		 3430
3431
3432 nfs4_label_free(res.label);
3433
136f2627 3434out:
136f2627 3435 nfs_free_fattr(res.fattr);
1da177e4
LT		 3436 return status;
3437}
3438
3439static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3440{
3441 struct nfs4_exception exception = { };
3442 int err;
3443 do {
3444 err = nfs4_handle_exception(NFS_SERVER(inode),
3445 _nfs4_proc_link(inode, dir, name),
3446 &exception);
3447 } while (exception.retry);
3448 return err;
3449}
3450
57dc9a57
TM		 3451struct nfs4_createdata {
3452 struct rpc_message msg;
3453 struct nfs4_create_arg arg;
3454 struct nfs4_create_res res;
3455 struct nfs_fh fh;
3456 struct nfs_fattr fattr;
1775fd3e 3457 struct nfs4_label *label;
57dc9a57
TM		 3458};
3459
3460static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3461 struct qstr *name, struct iattr *sattr, u32 ftype)
3462{
3463 struct nfs4_createdata *data;
3464
3465 data = kzalloc(sizeof(*data), GFP_KERNEL);
3466 if (data != NULL) {
3467 struct nfs_server *server = NFS_SERVER(dir);
3468
14c43f76
DQ		 3469 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3470 if (IS_ERR(data->label))
3471 goto out_free;
3472
57dc9a57
TM		 3473 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3474 data->msg.rpc_argp = &data->arg;
3475 data->msg.rpc_resp = &data->res;
3476 data->arg.dir_fh = NFS_FH(dir);
3477 data->arg.server = server;
3478 data->arg.name = name;
3479 data->arg.attrs = sattr;
3480 data->arg.ftype = ftype;
aa9c2669 3481 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3482 data->res.server = server;
3483 data->res.fh = &data->fh;
3484 data->res.fattr = &data->fattr;
1775fd3e 3485 data->res.label = data->label;
57dc9a57 3486 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3487 }
3488 return data;
14c43f76
DQ		 3489out_free:
3490 kfree(data);
3491 return NULL;
57dc9a57
TM		 3492}
3493
3494static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3495{
7c513058 3496 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3497 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3498 if (status == 0) {
3499 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3500 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3501 }
3502 return status;
3503}
3504
3505static void nfs4_free_createdata(struct nfs4_createdata *data)
3506{
14c43f76 3507 nfs4_label_free(data->label);
57dc9a57
TM		 3508 kfree(data);
3509}
3510
4f390c15 3511static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3512 struct page *page, unsigned int len, struct iattr *sattr,
3513 struct nfs4_label *label)
1da177e4 3514{
57dc9a57
TM		 3515 struct nfs4_createdata *data;
3516 int status = -ENAMETOOLONG;
1da177e4 3517
94a6d753 3518 if (len > NFS4_MAXPATHLEN)
57dc9a57 3519 goto out;
4f390c15 3520
57dc9a57
TM		 3521 status = -ENOMEM;
3522 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3523 if (data == NULL)
3524 goto out;
3525
3526 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3527 data->arg.u.symlink.pages = &page;
3528 data->arg.u.symlink.len = len;
1775fd3e 3529 data->arg.label = label;
1da177e4 3530
57dc9a57
TM		 3531 status = nfs4_do_create(dir, dentry, data);
3532
3533 nfs4_free_createdata(data);
3534out:
1da177e4
LT		 3535 return status;
3536}
3537
4f390c15 3538static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3539 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3540{
3541 struct nfs4_exception exception = { };
aa9c2669 3542 struct nfs4_label l, *label = NULL;
1da177e4 3543 int err;
aa9c2669
DQ		 3544
3545 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3546
1da177e4 3547 do {
078ea3df
TM		 3548 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3549 trace_nfs4_symlink(dir, &dentry->d_name, err);
3550 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3551 &exception);
3552 } while (exception.retry);
aa9c2669
DQ		 3553
3554 nfs4_label_release_security(label);
1da177e4
LT		 3555 return err;
3556}
3557
3558static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3559 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3560{
57dc9a57
TM		 3561 struct nfs4_createdata *data;
3562 int status = -ENOMEM;
1da177e4 3563
57dc9a57
TM		 3564 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3565 if (data == NULL)
3566 goto out;
3567
1775fd3e 3568 data->arg.label = label;
57dc9a57
TM		 3569 status = nfs4_do_create(dir, dentry, data);
3570
3571 nfs4_free_createdata(data);
3572out:
1da177e4
LT		 3573 return status;
3574}
3575
3576static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3577 struct iattr *sattr)
3578{
3579 struct nfs4_exception exception = { };
aa9c2669 3580 struct nfs4_label l, *label = NULL;
1da177e4 3581 int err;
a8a5da99 3582
aa9c2669
DQ		 3583 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3584
a8a5da99 3585 sattr->ia_mode &= ~current_umask();
1da177e4 3586 do {
078ea3df
TM		 3587 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3588 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3589 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3590 &exception);
3591 } while (exception.retry);
aa9c2669
DQ		 3592 nfs4_label_release_security(label);
3593
1da177e4
LT		 3594 return err;
3595}
3596
3597static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3598 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3599{
3600 struct inode *dir = dentry->d_inode;
3601 struct nfs4_readdir_arg args = {
3602 .fh = NFS_FH(dir),
56e4ebf8 3603 .pages = pages,
1da177e4
LT		 3604 .pgbase = 0,
3605 .count = count,
96d25e53 3606 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3607 .plus = plus,
1da177e4
LT		 3608 };
3609 struct nfs4_readdir_res res;
3610 struct rpc_message msg = {
3611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3612 .rpc_argp = &args,
3613 .rpc_resp = &res,
3614 .rpc_cred = cred,
3615 };
3616 int status;
3617
3110ff80 3618 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3619 dentry->d_parent->d_name.name,
3620 dentry->d_name.name,
3621 (unsigned long long)cookie);
c3f52af3 3622 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3623 res.pgbase = args.pgbase;
7c513058 3624 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3625 if (status >= 0) {
c3f52af3 3626 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3627 status += args.pgbase;
3628 }
c4812998
TM		 3629
3630 nfs_invalidate_atime(dir);
3631
3110ff80 3632 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3633 return status;
3634}
3635
3636static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3637 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3638{
3639 struct nfs4_exception exception = { };
3640 int err;
3641 do {
c1578b76
TM		 3642 err = _nfs4_proc_readdir(dentry, cred, cookie,
3643 pages, count, plus);
3644 trace_nfs4_readdir(dentry->d_inode, err);
3645 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3646 &exception);
3647 } while (exception.retry);
3648 return err;
3649}
3650
3651static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3652 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3653{
57dc9a57
TM		 3654 struct nfs4_createdata *data;
3655 int mode = sattr->ia_mode;
3656 int status = -ENOMEM;
1da177e4 3657
57dc9a57
TM		 3658 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3659 if (data == NULL)
3660 goto out;
3661
1da177e4 3662 if (S_ISFIFO(mode))
57dc9a57 3663 data->arg.ftype = NF4FIFO;
1da177e4 3664 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3665 data->arg.ftype = NF4BLK;
3666 data->arg.u.device.specdata1 = MAJOR(rdev);
3667 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3668 }
3669 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3670 data->arg.ftype = NF4CHR;
3671 data->arg.u.device.specdata1 = MAJOR(rdev);
3672 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3673 } else if (!S_ISSOCK(mode)) {
3674 status = -EINVAL;
3675 goto out_free;
1da177e4 3676 }
1775fd3e 3677
aa9c2669 3678 data->arg.label = label;
57dc9a57 3679 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3680out_free:
57dc9a57
TM		 3681 nfs4_free_createdata(data);
3682out:
1da177e4
LT		 3683 return status;
3684}
3685
3686static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3687 struct iattr *sattr, dev_t rdev)
3688{
3689 struct nfs4_exception exception = { };
aa9c2669 3690 struct nfs4_label l, *label = NULL;
1da177e4 3691 int err;
a8a5da99 3692
aa9c2669
DQ		 3693 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3694
a8a5da99 3695 sattr->ia_mode &= ~current_umask();
1da177e4 3696 do {
078ea3df
TM		 3697 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3698 trace_nfs4_mknod(dir, &dentry->d_name, err);
3699 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3700 &exception);
3701 } while (exception.retry);
aa9c2669
DQ		 3702
3703 nfs4_label_release_security(label);
3704
1da177e4
LT		 3705 return err;
3706}
3707
3708static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3709 struct nfs_fsstat *fsstat)
3710{
3711 struct nfs4_statfs_arg args = {
3712 .fh = fhandle,
3713 .bitmask = server->attr_bitmask,
3714 };
24ad148a
BH		 3715 struct nfs4_statfs_res res = {
3716 .fsstat = fsstat,
3717 };
1da177e4
LT		 3718 struct rpc_message msg = {
3719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3720 .rpc_argp = &args,
24ad148a 3721 .rpc_resp = &res,
1da177e4
LT		 3722 };
3723
0e574af1 3724 nfs_fattr_init(fsstat->fattr);
7c513058 3725 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3726}
3727
3728static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3729{
3730 struct nfs4_exception exception = { };
3731 int err;
3732 do {
3733 err = nfs4_handle_exception(server,
3734 _nfs4_proc_statfs(server, fhandle, fsstat),
3735 &exception);
3736 } while (exception.retry);
3737 return err;
3738}
3739
3740static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3741 struct nfs_fsinfo *fsinfo)
3742{
3743 struct nfs4_fsinfo_arg args = {
3744 .fh = fhandle,
3745 .bitmask = server->attr_bitmask,
3746 };
3dda5e43
BH		 3747 struct nfs4_fsinfo_res res = {
3748 .fsinfo = fsinfo,
3749 };
1da177e4
LT		 3750 struct rpc_message msg = {
3751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3752 .rpc_argp = &args,
3dda5e43 3753 .rpc_resp = &res,
1da177e4
LT		 3754 };
3755
7c513058 3756 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3757}
3758
3759static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3760{
3761 struct nfs4_exception exception = { };
83ca7f5a 3762 unsigned long now = jiffies;
1da177e4
LT		 3763 int err;
3764
3765 do {
83ca7f5a 3766 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3767 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3768 if (err == 0) {
3769 struct nfs_client *clp = server->nfs_client;
3770
3771 spin_lock(&clp->cl_lock);
3772 clp->cl_lease_time = fsinfo->lease_time * HZ;
3773 clp->cl_last_renewal = now;
3774 spin_unlock(&clp->cl_lock);
3775 break;
3776 }
3777 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3778 } while (exception.retry);
3779 return err;
3780}
3781
3782static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3783{
e38eb650
BS		 3784 int error;
3785
0e574af1 3786 nfs_fattr_init(fsinfo->fattr);
e38eb650 3787 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3788 if (error == 0) {
3789 /* block layout checks this! */
3790 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3791 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3792 }
e38eb650
BS		 3793
3794 return error;
1da177e4
LT		 3795}
3796
3797static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3798 struct nfs_pathconf *pathconf)
3799{
3800 struct nfs4_pathconf_arg args = {
3801 .fh = fhandle,
3802 .bitmask = server->attr_bitmask,
3803 };
d45b2989
BH		 3804 struct nfs4_pathconf_res res = {
3805 .pathconf = pathconf,
3806 };
1da177e4
LT		 3807 struct rpc_message msg = {
3808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3809 .rpc_argp = &args,
d45b2989 3810 .rpc_resp = &res,
1da177e4
LT		 3811 };
3812
3813 /* None of the pathconf attributes are mandatory to implement */
3814 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3815 memset(pathconf, 0, sizeof(*pathconf));
3816 return 0;
3817 }
3818
0e574af1 3819 nfs_fattr_init(pathconf->fattr);
7c513058 3820 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3821}
3822
3823static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3824 struct nfs_pathconf *pathconf)
3825{
3826 struct nfs4_exception exception = { };
3827 int err;
3828
3829 do {
3830 err = nfs4_handle_exception(server,
3831 _nfs4_proc_pathconf(server, fhandle, pathconf),
3832 &exception);
3833 } while (exception.retry);
3834 return err;
3835}
3836
5521abfd 3837int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3838 const struct nfs_open_context *ctx,
3839 const struct nfs_lock_context *l_ctx,
3840 fmode_t fmode)
3841{
3842 const struct nfs_lockowner *lockowner = NULL;
3843
3844 if (l_ctx != NULL)
3845 lockowner = &l_ctx->lockowner;
5521abfd 3846 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3847}
3848EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3849
5521abfd
TM		 3850static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3851 const struct nfs_open_context *ctx,
3852 const struct nfs_lock_context *l_ctx,
3853 fmode_t fmode)
3854{
3855 nfs4_stateid current_stateid;
3856
3857 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3858 return false;
3859 return nfs4_stateid_match(stateid, &current_stateid);
3860}
3861
3862static bool nfs4_error_stateid_expired(int err)
3863{
3864 switch (err) {
3865 case -NFS4ERR_DELEG_REVOKED:
3866 case -NFS4ERR_ADMIN_REVOKED:
3867 case -NFS4ERR_BAD_STATEID:
3868 case -NFS4ERR_STALE_STATEID:
3869 case -NFS4ERR_OLD_STATEID:
3870 case -NFS4ERR_OPENMODE:
3871 case -NFS4ERR_EXPIRED:
3872 return true;
3873 }
3874 return false;
3875}
3876
d20581aa
BH		 3877void __nfs4_read_done_cb(struct nfs_read_data *data)
3878{
cd841605 3879 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3880}
3881
cbdabc7f 3882static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3883{
cd841605 3884 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3885
cc668ab3 3886 trace_nfs4_read(data, task->tk_status);
9e33bed5 3887 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3888 rpc_restart_call_prepare(task);
ec06c096 3889 return -EAGAIN;
1da177e4 3890 }
8850df99 3891
d20581aa 3892 __nfs4_read_done_cb(data);
1da177e4 3893 if (task->tk_status > 0)
ec06c096
TM		 3894 renew_lease(server, data->timestamp);
3895 return 0;
1da177e4
LT		 3896}
3897
5521abfd
TM		 3898static bool nfs4_read_stateid_changed(struct rpc_task *task,
3899 struct nfs_readargs *args)
3900{
3901
3902 if (!nfs4_error_stateid_expired(task->tk_status) ||
3903 nfs4_stateid_is_current(&args->stateid,
3904 args->context,
3905 args->lock_context,
3906 FMODE_READ))
3907 return false;
3908 rpc_restart_call_prepare(task);
3909 return true;
3910}
3911
cbdabc7f
AA		 3912static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3913{
3914
3915 dprintk("--> %s\n", __func__);
3916
3917 if (!nfs4_sequence_done(task, &data->res.seq_res))
3918 return -EAGAIN;
5521abfd
TM		 3919 if (nfs4_read_stateid_changed(task, &data->args))
3920 return -EAGAIN;
d20581aa
BH		 3921 return data->read_done_cb ? data->read_done_cb(task, data) :
3922 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3923}
3924
bdc7f021 3925static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3926{
1da177e4 3927 data->timestamp = jiffies;
cbdabc7f 3928 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3929 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3930 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3931}
3932
ea7c3303
BS		 3933static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3934{
9b206149 3935 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3936 &data->args.seq_args,
3937 &data->res.seq_res,
9b206149
TM		 3938 task))
3939 return;
3940 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3941 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3942}
3943
b029bc9b 3944static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3945{
cd841605 3946 struct inode *inode = data->header->inode;
1da177e4 3947
cc668ab3 3948 trace_nfs4_write(data, task->tk_status);
9e33bed5 3949 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3950 rpc_restart_call_prepare(task);
788e7a89 3951 return -EAGAIN;
1da177e4 3952 }
4f9838c7 3953 if (task->tk_status >= 0) {
1da177e4 3954 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3955 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3956 }
788e7a89 3957 return 0;
1da177e4
LT		 3958}
3959
5521abfd
TM		 3960static bool nfs4_write_stateid_changed(struct rpc_task *task,
3961 struct nfs_writeargs *args)
3962{
3963
3964 if (!nfs4_error_stateid_expired(task->tk_status) ||
3965 nfs4_stateid_is_current(&args->stateid,
3966 args->context,
3967 args->lock_context,
3968 FMODE_WRITE))
3969 return false;
3970 rpc_restart_call_prepare(task);
3971 return true;
3972}
3973
b029bc9b
FI		 3974static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3975{
3976 if (!nfs4_sequence_done(task, &data->res.seq_res))
3977 return -EAGAIN;
5521abfd
TM		 3978 if (nfs4_write_stateid_changed(task, &data->args))
3979 return -EAGAIN;
d20581aa
BH		 3980 return data->write_done_cb ? data->write_done_cb(task, data) :
3981 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3982}
3983
5a37f851
TM		 3984static
3985bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3986{
5a37f851
TM		 3987 const struct nfs_pgio_header *hdr = data->header;
3988
3989 /* Don't request attributes for pNFS or O_DIRECT writes */
3990 if (data->ds_clp != NULL || hdr->dreq != NULL)
3991 return false;
3992 /* Otherwise, request attributes if and only if we don't hold
3993 * a delegation
3994 */
011e2a7f 3995 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3996}
a69aef14 3997
bdc7f021 3998static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3999{
cd841605 4000 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4001
5a37f851 4002 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4003 data->args.bitmask = NULL;
4004 data->res.fattr = NULL;
4005 } else
4006 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4007
b029bc9b
FI		 4008 if (!data->write_done_cb)
4009 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4010 data->res.server = server;
1da177e4
LT		 4011 data->timestamp = jiffies;
4012
bdc7f021 4013 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 4014 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4015}
4016
c6cb80d0
BS		 4017static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4018{
9b206149 4019 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4020 &data->args.seq_args,
4021 &data->res.seq_res,
9b206149
TM		 4022 task))
4023 return;
4024 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4025 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4026}
4027
0b7c0153 4028static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4029{
d9afbd1b
TM		 4030 nfs4_setup_sequence(NFS_SERVER(data->inode),
4031 &data->args.seq_args,
4032 &data->res.seq_res,
4033 task);
1da177e4
LT		 4034}
4035
0b7c0153 4036static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4037{
1da177e4 4038 struct inode *inode = data->inode;
14516c3a 4039
cc668ab3 4040 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4041 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4042 rpc_restart_call_prepare(task);
788e7a89 4043 return -EAGAIN;
1da177e4 4044 }
788e7a89 4045 return 0;
1da177e4
LT		 4046}
4047
0b7c0153 4048static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4049{
4050 if (!nfs4_sequence_done(task, &data->res.seq_res))
4051 return -EAGAIN;
0b7c0153 4052 return data->commit_done_cb(task, data);
5f452431
FI		 4053}
4054
0b7c0153 4055static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4056{
788e7a89 4057 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4058
0b7c0153
FI		 4059 if (data->commit_done_cb == NULL)
4060 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4061 data->res.server = server;
bdc7f021 4062 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4063 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4064}
4065
9bc4e3ca
CL		 4066struct nfs4_renewdata {
4067 struct nfs_client *client;
4068 unsigned long timestamp;
4069};
4070
1da177e4
LT		 4071/*
4072 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4073 * standalone procedure for queueing an asynchronous RENEW.
4074 */
9bc4e3ca 4075static void nfs4_renew_release(void *calldata)
dc96aef9 4076{
9bc4e3ca
CL		 4077 struct nfs4_renewdata *data = calldata;
4078 struct nfs_client *clp = data->client;
dc96aef9 4079
0851de06
AB		 4080 if (atomic_read(&clp->cl_count) > 1)
4081 nfs4_schedule_state_renewal(clp);
4082 nfs_put_client(clp);
9bc4e3ca 4083 kfree(data);
dc96aef9
AB		 4084}
4085
9bc4e3ca 4086static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4087{
9bc4e3ca
CL		 4088 struct nfs4_renewdata *data = calldata;
4089 struct nfs_client *clp = data->client;
4090 unsigned long timestamp = data->timestamp;
1da177e4 4091
c6d01c6f 4092 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4093 if (task->tk_status < 0) {
95baa25c 4094 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4095 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4096 return;
4097 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4098 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4099 return;
4100 }
4101 nfs4_schedule_path_down_recovery(clp);
1da177e4 4102 }
452e9352 4103 do_renew_lease(clp, timestamp);
1da177e4
LT		 4104}
4105
963d8fe5
TM		 4106static const struct rpc_call_ops nfs4_renew_ops = {
4107 .rpc_call_done = nfs4_renew_done,
dc96aef9 4108 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4109};
4110
2f60ea6b 4111static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4112{
4113 struct rpc_message msg = {
4114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4115 .rpc_argp = clp,
b4454fe1 4116 .rpc_cred = cred,
1da177e4 4117 };
9bc4e3ca 4118 struct nfs4_renewdata *data;
1da177e4 4119
2f60ea6b
TM		 4120 if (renew_flags == 0)
4121 return 0;
0851de06
AB		 4122 if (!atomic_inc_not_zero(&clp->cl_count))
4123 return -EIO;
b569ad34 4124 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4125 if (data == NULL)
4126 return -ENOMEM;
4127 data->client = clp;
4128 data->timestamp = jiffies;
bc7a05ca 4129 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4130 &nfs4_renew_ops, data);
1da177e4
LT		 4131}
4132
8534d4ec 4133static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4134{
4135 struct rpc_message msg = {
4136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4137 .rpc_argp = clp,
b4454fe1 4138 .rpc_cred = cred,
1da177e4
LT		 4139 };
4140 unsigned long now = jiffies;
4141 int status;
4142
bc7a05ca 4143 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4144 if (status < 0)
4145 return status;
452e9352 4146 do_renew_lease(clp, now);
1da177e4
LT		 4147 return 0;
4148}
4149
aa1870af
BF		 4150static inline int nfs4_server_supports_acls(struct nfs_server *server)
4151{
4152 return (server->caps & NFS_CAP_ACLS)
4153 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4154 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4155}
4156
21f498c2
TM		 4157/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4158 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4159 * the stack.
4160 */
21f498c2 4161#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4162
e9e3d724
NH		 4163static int buf_to_pages_noslab(const void *buf, size_t buflen,
4164 struct page **pages, unsigned int *pgbase)
4165{
4166 struct page *newpage, **spages;
4167 int rc = 0;
4168 size_t len;
4169 spages = pages;
4170
4171 do {
21f498c2 4172 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4173 newpage = alloc_page(GFP_KERNEL);
4174
4175 if (newpage == NULL)
4176 goto unwind;
4177 memcpy(page_address(newpage), buf, len);
4178 buf += len;
4179 buflen -= len;
4180 *pages++ = newpage;
4181 rc++;
4182 } while (buflen != 0);
4183
4184 return rc;
4185
4186unwind:
4187 for(; rc > 0; rc--)
4188 __free_page(spages[rc-1]);
4189 return -ENOMEM;
4190}
4191
e50a1c2e
BF		 4192struct nfs4_cached_acl {
4193 int cached;
4194 size_t len;
3e9d4154 4195 char data[0];
e50a1c2e
BF		 4196};
4197
4198static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4199{
4200 struct nfs_inode *nfsi = NFS_I(inode);
4201
4202 spin_lock(&inode->i_lock);
4203 kfree(nfsi->nfs4_acl);
4204 nfsi->nfs4_acl = acl;
4205 spin_unlock(&inode->i_lock);
4206}
4207
4208static void nfs4_zap_acl_attr(struct inode *inode)
4209{
4210 nfs4_set_cached_acl(inode, NULL);
4211}
4212
4213static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4214{
4215 struct nfs_inode *nfsi = NFS_I(inode);
4216 struct nfs4_cached_acl *acl;
4217 int ret = -ENOENT;
4218
4219 spin_lock(&inode->i_lock);
4220 acl = nfsi->nfs4_acl;
4221 if (acl == NULL)
4222 goto out;
4223 if (buf == NULL) /* user is just asking for length */
4224 goto out_len;
4225 if (acl->cached == 0)
4226 goto out;
4227 ret = -ERANGE; /* see getxattr(2) man page */
4228 if (acl->len > buflen)
4229 goto out;
4230 memcpy(buf, acl->data, acl->len);
4231out_len:
4232 ret = acl->len;
4233out:
4234 spin_unlock(&inode->i_lock);
4235 return ret;
4236}
4237
5794d21e 4238static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4239{
4240 struct nfs4_cached_acl *acl;
b291f1b1 4241 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4242
1f1ea6c2 4243 if (buflen <= PAGE_SIZE) {
b291f1b1 4244 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4245 if (acl == NULL)
4246 goto out;
4247 acl->cached = 1;
5794d21e 4248 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4249 } else {
4250 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4251 if (acl == NULL)
4252 goto out;
4253 acl->cached = 0;
4254 }
4255 acl->len = acl_len;
4256out:
4257 nfs4_set_cached_acl(inode, acl);
4258}
4259
bf118a34
AA		 4260/*
4261 * The getxattr API returns the required buffer length when called with a
4262 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4263 * the required buf. On a NULL buf, we send a page of data to the server
4264 * guessing that the ACL request can be serviced by a page. If so, we cache
4265 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4266 * the cache. If not so, we throw away the page, and cache the required
4267 * length. The next getxattr call will then produce another round trip to
4268 * the server, this time with the input buf of the required size.
4269 */
16b4289c 4270static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4271{
bf118a34 4272 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4273 struct nfs_getaclargs args = {
4274 .fh = NFS_FH(inode),
4275 .acl_pages = pages,
4276 .acl_len = buflen,
4277 };
663c79b3
BH		 4278 struct nfs_getaclres res = {
4279 .acl_len = buflen,
4280 };
aa1870af
BF		 4281 struct rpc_message msg = {
4282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4283 .rpc_argp = &args,
663c79b3 4284 .rpc_resp = &res,
aa1870af 4285 };
21f498c2
TM		 4286 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4287 int ret = -ENOMEM, i;
aa1870af 4288
bf118a34
AA		 4289 /* As long as we're doing a round trip to the server anyway,
4290 * let's be prepared for a page of acl data. */
4291 if (npages == 0)
4292 npages = 1;
21f498c2
TM		 4293 if (npages > ARRAY_SIZE(pages))
4294 return -ERANGE;
5a006899 4295
bf118a34
AA		 4296 for (i = 0; i < npages; i++) {
4297 pages[i] = alloc_page(GFP_KERNEL);
4298 if (!pages[i])
4299 goto out_free;
e50a1c2e 4300 }
5a006899
SP		 4301
4302 /* for decoding across pages */
4303 res.acl_scratch = alloc_page(GFP_KERNEL);
4304 if (!res.acl_scratch)
4305 goto out_free;
4306
bf118a34
AA		 4307 args.acl_len = npages * PAGE_SIZE;
4308 args.acl_pgbase = 0;
5a006899 4309
de040bec 4310 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4311 __func__, buf, buflen, npages, args.acl_len);
4312 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4313 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4314 if (ret)
4315 goto out_free;
bf118a34 4316
1f1ea6c2
TM		 4317 /* Handle the case where the passed-in buffer is too short */
4318 if (res.acl_flags & NFS4_ACL_TRUNC) {
4319 /* Did the user only issue a request for the acl length? */
4320 if (buf == NULL)
4321 goto out_ok;
e50a1c2e 4322 ret = -ERANGE;
1f1ea6c2 4323 goto out_free;
e50a1c2e 4324 }
1f1ea6c2 4325 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4326 if (buf) {
4327 if (res.acl_len > buflen) {
4328 ret = -ERANGE;
4329 goto out_free;
4330 }
1f1ea6c2 4331 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4332 }
1f1ea6c2
TM		 4333out_ok:
4334 ret = res.acl_len;
e50a1c2e 4335out_free:
bf118a34
AA		 4336 for (i = 0; i < npages; i++)
4337 if (pages[i])
4338 __free_page(pages[i]);
331818f1
TM		 4339 if (res.acl_scratch)
4340 __free_page(res.acl_scratch);
aa1870af
BF		 4341 return ret;
4342}
4343
16b4289c
TM		 4344static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4345{
4346 struct nfs4_exception exception = { };
4347 ssize_t ret;
4348 do {
4349 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4350 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4351 if (ret >= 0)
4352 break;
4353 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4354 } while (exception.retry);
4355 return ret;
4356}
4357
e50a1c2e
BF		 4358static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4359{
4360 struct nfs_server *server = NFS_SERVER(inode);
4361 int ret;
4362
4363 if (!nfs4_server_supports_acls(server))
4364 return -EOPNOTSUPP;
4365 ret = nfs_revalidate_inode(server, inode);
4366 if (ret < 0)
4367 return ret;
08a22b39
AK		 4368 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4369 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4370 ret = nfs4_read_cached_acl(inode, buf, buflen);
4371 if (ret != -ENOENT)
bf118a34
AA		 4372 /* -ENOENT is returned if there is no ACL or if there is an ACL
4373 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4374 return ret;
4375 return nfs4_get_acl_uncached(inode, buf, buflen);
4376}
4377
16b4289c 4378static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4379{
4380 struct nfs_server *server = NFS_SERVER(inode);
4381 struct page *pages[NFS4ACL_MAXPAGES];
4382 struct nfs_setaclargs arg = {
4383 .fh = NFS_FH(inode),
4384 .acl_pages = pages,
4385 .acl_len = buflen,
4386 };
73c403a9 4387 struct nfs_setaclres res;
4b580ee3
BF		 4388 struct rpc_message msg = {
4389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4390 .rpc_argp = &arg,
73c403a9 4391 .rpc_resp = &res,
4b580ee3 4392 };
21f498c2 4393 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4394 int ret, i;
4b580ee3
BF		 4395
4396 if (!nfs4_server_supports_acls(server))
4397 return -EOPNOTSUPP;
21f498c2
TM		 4398 if (npages > ARRAY_SIZE(pages))
4399 return -ERANGE;
e9e3d724
NH		 4400 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4401 if (i < 0)
4402 return i;
57ec14c5 4403 nfs4_inode_return_delegation(inode);
7c513058 4404 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4405
4406 /*
4407 * Free each page after tx, so the only ref left is
4408 * held by the network stack
4409 */
4410 for (; i > 0; i--)
4411 put_page(pages[i-1]);
4412
08a22b39
AK		 4413 /*
4414 * Acl update can result in inode attribute update.
4415 * so mark the attribute cache invalid.
4416 */
4417 spin_lock(&inode->i_lock);
4418 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4419 spin_unlock(&inode->i_lock);
f41f7418
TM		 4420 nfs_access_zap_cache(inode);
4421 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4422 return ret;
4423}
4424
16b4289c
TM		 4425static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4426{
4427 struct nfs4_exception exception = { };
4428 int err;
4429 do {
c1578b76
TM		 4430 err = __nfs4_proc_set_acl(inode, buf, buflen);
4431 trace_nfs4_set_acl(inode, err);
4432 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4433 &exception);
4434 } while (exception.retry);
4435 return err;
4436}
4437
aa9c2669
DQ		 4438#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4439static int _nfs4_get_security_label(struct inode *inode, void *buf,
4440 size_t buflen)
4441{
4442 struct nfs_server *server = NFS_SERVER(inode);
4443 struct nfs_fattr fattr;
4444 struct nfs4_label label = {0, 0, buflen, buf};
4445
4446 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4447 struct nfs4_getattr_arg args = {
4448 .fh = NFS_FH(inode),
4449 .bitmask = bitmask,
4450 };
4451 struct nfs4_getattr_res res = {
4452 .fattr = &fattr,
4453 .label = &label,
4454 .server = server,
4455 };
4456 struct rpc_message msg = {
4457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4458 .rpc_argp = &args,
4459 .rpc_resp = &res,
4460 };
4461 int ret;
4462
4463 nfs_fattr_init(&fattr);
4464
4465 ret = rpc_call_sync(server->client, &msg, 0);
4466 if (ret)
4467 return ret;
4468 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4469 return -ENOENT;
4470 if (buflen < label.len)
4471 return -ERANGE;
4472 return 0;
4473}
4474
4475static int nfs4_get_security_label(struct inode *inode, void *buf,
4476 size_t buflen)
4477{
4478 struct nfs4_exception exception = { };
4479 int err;
4480
4481 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4482 return -EOPNOTSUPP;
4483
4484 do {
c1578b76
TM		 4485 err = _nfs4_get_security_label(inode, buf, buflen);
4486 trace_nfs4_get_security_label(inode, err);
4487 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4488 &exception);
4489 } while (exception.retry);
4490 return err;
4491}
4492
4493static int _nfs4_do_set_security_label(struct inode *inode,
4494 struct nfs4_label *ilabel,
4495 struct nfs_fattr *fattr,
4496 struct nfs4_label *olabel)
4497{
4498
4499 struct iattr sattr = {0};
4500 struct nfs_server *server = NFS_SERVER(inode);
4501 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4502 struct nfs_setattrargs args = {
4503 .fh = NFS_FH(inode),
4504 .iap = &sattr,
4505 .server = server,
4506 .bitmask = bitmask,
4507 .label = ilabel,
4508 };
4509 struct nfs_setattrres res = {
4510 .fattr = fattr,
4511 .label = olabel,
4512 .server = server,
4513 };
4514 struct rpc_message msg = {
4515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4516 .rpc_argp = &args,
4517 .rpc_resp = &res,
4518 };
4519 int status;
4520
4521 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4522
4523 status = rpc_call_sync(server->client, &msg, 0);
4524 if (status)
4525 dprintk("%s failed: %d\n", __func__, status);
4526
4527 return status;
4528}
4529
4530static int nfs4_do_set_security_label(struct inode *inode,
4531 struct nfs4_label *ilabel,
4532 struct nfs_fattr *fattr,
4533 struct nfs4_label *olabel)
4534{
4535 struct nfs4_exception exception = { };
4536 int err;
4537
4538 do {
c1578b76
TM		 4539 err = _nfs4_do_set_security_label(inode, ilabel,
4540 fattr, olabel);
4541 trace_nfs4_set_security_label(inode, err);
4542 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4543 &exception);
4544 } while (exception.retry);
4545 return err;
4546}
4547
4548static int
4549nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4550{
4551 struct nfs4_label ilabel, *olabel = NULL;
4552 struct nfs_fattr fattr;
4553 struct rpc_cred *cred;
4554 struct inode *inode = dentry->d_inode;
4555 int status;
4556
4557 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4558 return -EOPNOTSUPP;
4559
4560 nfs_fattr_init(&fattr);
4561
4562 ilabel.pi = 0;
4563 ilabel.lfs = 0;
4564 ilabel.label = (char *)buf;
4565 ilabel.len = buflen;
4566
4567 cred = rpc_lookup_cred();
4568 if (IS_ERR(cred))
4569 return PTR_ERR(cred);
4570
4571 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4572 if (IS_ERR(olabel)) {
4573 status = -PTR_ERR(olabel);
4574 goto out;
4575 }
4576
4577 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4578 if (status == 0)
4579 nfs_setsecurity(inode, &fattr, olabel);
4580
4581 nfs4_label_free(olabel);
4582out:
4583 put_rpccred(cred);
4584 return status;
4585}
4586#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4587
4588
1da177e4 4589static int
aa5190d0 4590nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4591{
aa5190d0
TM		 4592 struct nfs_client *clp = server->nfs_client;
4593
4594 if (task->tk_status >= 0)
1da177e4
LT		 4595 return 0;
4596 switch(task->tk_status) {
a1d0b5ee 4597 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4598 case -NFS4ERR_ADMIN_REVOKED:
4599 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4600 if (state == NULL)
4601 break;
4602 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4603 case -NFS4ERR_OPENMODE:
4604 if (state == NULL)
4605 break;
5d422301
TM		 4606 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4607 goto stateid_invalid;
0400a6b0 4608 goto wait_on_recovery;
0ced63d1 4609 case -NFS4ERR_EXPIRED:
5d422301
TM		 4610 if (state != NULL) {
4611 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4612 goto stateid_invalid;
4613 }
1da177e4 4614 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4615 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4616 nfs4_schedule_lease_recovery(clp);
4617 goto wait_on_recovery;
4745e315
AA		 4618#if defined(CONFIG_NFS_V4_1)
4619 case -NFS4ERR_BADSESSION:
4620 case -NFS4ERR_BADSLOT:
4621 case -NFS4ERR_BAD_HIGH_SLOT:
4622 case -NFS4ERR_DEADSESSION:
4623 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4624 case -NFS4ERR_SEQ_FALSE_RETRY:
4625 case -NFS4ERR_SEQ_MISORDERED:
4626 dprintk("%s ERROR %d, Reset session\n", __func__,
4627 task->tk_status);
9f594791 4628 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4629 task->tk_status = 0;
4630 return -EAGAIN;
4631#endif /* CONFIG_NFS_V4_1 */
1da177e4 4632 case -NFS4ERR_DELAY:
aa5190d0 4633 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4634 case -NFS4ERR_GRACE:
1da177e4
LT		 4635 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4636 task->tk_status = 0;
4637 return -EAGAIN;
a8a4ae3a 4638 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4639 case -NFS4ERR_OLD_STATEID:
4640 task->tk_status = 0;
4641 return -EAGAIN;
4642 }
4643 task->tk_status = nfs4_map_errors(task->tk_status);
4644 return 0;
5d422301
TM		 4645stateid_invalid:
4646 task->tk_status = -EIO;
4647 return 0;
0400a6b0 4648wait_on_recovery:
a2c0b9e2 4649 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4650 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4651 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4652 task->tk_status = 0;
4653 return -EAGAIN;
1da177e4
LT		 4654}
4655
f092075d
CL		 4656static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4657 nfs4_verifier *bootverf)
cd93710e
CL		 4658{
4659 __be32 verf[2];
4660
2c820d9a
CL		 4661 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4662 /* An impossible timestamp guarantees this value
4663 * will never match a generated boot time. */
4664 verf[0] = 0;
17f26b12 4665 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4666 } else {
f092075d 4667 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4668 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4669 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4670 }
cd93710e
CL		 4671 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4672}
4673
e984a55a
CL		 4674static unsigned int
4675nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4676 char *buf, size_t len)
4677{
4678 unsigned int result;
4679
4680 rcu_read_lock();
4681 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4682 clp->cl_ipaddr,
4683 rpc_peeraddr2str(clp->cl_rpcclient,
4684 RPC_DISPLAY_ADDR),
4685 rpc_peeraddr2str(clp->cl_rpcclient,
4686 RPC_DISPLAY_PROTO));
4687 rcu_read_unlock();
4688 return result;
4689}
4690
4691static unsigned int
4692nfs4_init_uniform_client_string(const struct nfs_client *clp,
4693 char *buf, size_t len)
4694{
55b59293 4695 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4696
4697 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4698 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4699 clp->rpc_ops->version,
4700 clp->cl_minorversion,
4701 nfs4_client_id_uniquifier,
4702 nodename);
e984a55a
CL		 4703 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4704 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4705 nodename);
e984a55a
CL		 4706}
4707
6bbb4ae8
CL		 4708/**
4709 * nfs4_proc_setclientid - Negotiate client ID
4710 * @clp: state data structure
4711 * @program: RPC program for NFSv4 callback service
4712 * @port: IP port number for NFS4 callback service
4713 * @cred: RPC credential to use for this call
4714 * @res: where to place the result
4715 *
4716 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4717 */
bb8b27e5
TM		 4718int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4719 unsigned short port, struct rpc_cred *cred,
4720 struct nfs4_setclientid_res *res)
1da177e4
LT		 4721{
4722 nfs4_verifier sc_verifier;
4723 struct nfs4_setclientid setclientid = {
4724 .sc_verifier = &sc_verifier,
4725 .sc_prog = program,
f4eecd5d 4726 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4727 };
4728 struct rpc_message msg = {
4729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4730 .rpc_argp = &setclientid,
bb8b27e5 4731 .rpc_resp = res,
286d7d6a 4732 .rpc_cred = cred,
1da177e4 4733 };
6bbb4ae8 4734 int status;
1da177e4 4735
de734831 4736 /* nfs_client_id4 */
f092075d 4737 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4738 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4739 setclientid.sc_name_len =
4740 nfs4_init_uniform_client_string(clp,
4741 setclientid.sc_name,
4742 sizeof(setclientid.sc_name));
4743 else
4744 setclientid.sc_name_len =
4745 nfs4_init_nonuniform_client_string(clp,
4746 setclientid.sc_name,
4747 sizeof(setclientid.sc_name));
de734831 4748 /* cb_client4 */
e984a55a 4749 rcu_read_lock();
de734831 4750 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4751 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4752 rpc_peeraddr2str(clp->cl_rpcclient,
4753 RPC_DISPLAY_NETID));
de734831
CL		 4754 rcu_read_unlock();
4755 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4756 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4757 clp->cl_ipaddr, port >> 8, port & 255);
4758
6bbb4ae8
CL		 4759 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4760 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4761 setclientid.sc_name_len, setclientid.sc_name);
4762 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4763 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4764 dprintk("NFS reply setclientid: %d\n", status);
4765 return status;
1da177e4
LT		 4766}
4767
6bbb4ae8
CL		 4768/**
4769 * nfs4_proc_setclientid_confirm - Confirm client ID
4770 * @clp: state data structure
4771 * @res: result of a previous SETCLIENTID
4772 * @cred: RPC credential to use for this call
4773 *
4774 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4775 */
fd954ae1 4776int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4777 struct nfs4_setclientid_res *arg,
4778 struct rpc_cred *cred)
1da177e4 4779{
1da177e4
LT		 4780 struct rpc_message msg = {
4781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4782 .rpc_argp = arg,
286d7d6a 4783 .rpc_cred = cred,
1da177e4 4784 };
1da177e4
LT		 4785 int status;
4786
6bbb4ae8
CL		 4787 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4788 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4789 clp->cl_clientid);
1bd714f2 4790 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4791 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4792 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4793 return status;
4794}
4795
fe650407
TM		 4796struct nfs4_delegreturndata {
4797 struct nfs4_delegreturnargs args;
fa178f29 4798 struct nfs4_delegreturnres res;
fe650407
TM		 4799 struct nfs_fh fh;
4800 nfs4_stateid stateid;
26e976a8 4801 unsigned long timestamp;
fa178f29 4802 struct nfs_fattr fattr;
fe650407
TM		 4803 int rpc_status;
4804};
4805
fe650407
TM		 4806static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4807{
4808 struct nfs4_delegreturndata *data = calldata;
938e1010 4809
14516c3a
TM		 4810 if (!nfs4_sequence_done(task, &data->res.seq_res))
4811 return;
938e1010 4812
ca8acf8d 4813 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4814 switch (task->tk_status) {
4815 case -NFS4ERR_STALE_STATEID:
4816 case -NFS4ERR_EXPIRED:
4817 case 0:
fa178f29 4818 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4819 break;
4820 default:
4821 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4822 -EAGAIN) {
d00c5d43 4823 rpc_restart_call_prepare(task);
79708861
RL		 4824 return;
4825 }
4826 }
4827 data->rpc_status = task->tk_status;
fe650407
TM		 4828}
4829
4830static void nfs4_delegreturn_release(void *calldata)
4831{
fe650407
TM		 4832 kfree(calldata);
4833}
4834
938e1010
AA		 4835#if defined(CONFIG_NFS_V4_1)
4836static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4837{
4838 struct nfs4_delegreturndata *d_data;
4839
4840 d_data = (struct nfs4_delegreturndata *)data;
4841
d9afbd1b
TM		 4842 nfs4_setup_sequence(d_data->res.server,
4843 &d_data->args.seq_args,
4844 &d_data->res.seq_res,
4845 task);
938e1010
AA		 4846}
4847#endif /* CONFIG_NFS_V4_1 */
4848
c8d149f3 4849static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4850#if defined(CONFIG_NFS_V4_1)
4851 .rpc_call_prepare = nfs4_delegreturn_prepare,
4852#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4853 .rpc_call_done = nfs4_delegreturn_done,
4854 .rpc_release = nfs4_delegreturn_release,
4855};
4856
e6f81075 4857static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4858{
4859 struct nfs4_delegreturndata *data;
fa178f29 4860 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4861 struct rpc_task *task;
5138fde0
TM		 4862 struct rpc_message msg = {
4863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4864 .rpc_cred = cred,
4865 };
c970aa85
TM		 4866 struct rpc_task_setup task_setup_data = {
4867 .rpc_client = server->client,
5138fde0 4868 .rpc_message = &msg,
c970aa85
TM		 4869 .callback_ops = &nfs4_delegreturn_ops,
4870 .flags = RPC_TASK_ASYNC,
4871 };
e6f81075 4872 int status = 0;
fe650407 4873
8535b2be 4874 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4875 if (data == NULL)
4876 return -ENOMEM;
9d12b216 4877 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4878 data->args.fhandle = &data->fh;
4879 data->args.stateid = &data->stateid;
9e907fec 4880 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4881 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4882 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4883 data->res.fattr = &data->fattr;
4884 data->res.server = server;
5138fde0 4885 nfs_fattr_init(data->res.fattr);
26e976a8 4886 data->timestamp = jiffies;
fe650407
TM		 4887 data->rpc_status = 0;
4888
c970aa85 4889 task_setup_data.callback_data = data;
1174dd1f
TM		 4890 msg.rpc_argp = &data->args;
4891 msg.rpc_resp = &data->res;
c970aa85 4892 task = rpc_run_task(&task_setup_data);
7a1218a2 4893 if (IS_ERR(task))
fe650407 4894 return PTR_ERR(task);
e6f81075
TM		 4895 if (!issync)
4896 goto out;
fe650407 4897 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4898 if (status != 0)
4899 goto out;
4900 status = data->rpc_status;
e144cbcc
TM		 4901 if (status == 0)
4902 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4903 else
4904 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4905out:
e6b3c4db 4906 rpc_put_task(task);
fe650407 4907 return status;
1da177e4
LT		 4908}
4909
e6f81075 4910int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4911{
4912 struct nfs_server *server = NFS_SERVER(inode);
4913 struct nfs4_exception exception = { };
4914 int err;
4915 do {
e6f81075 4916 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 4917 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 4918 switch (err) {
4919 case -NFS4ERR_STALE_STATEID:
4920 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4921 case 0:
4922 return 0;
4923 }
4924 err = nfs4_handle_exception(server, err, &exception);
4925 } while (exception.retry);
4926 return err;
4927}
4928
4929#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4930#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4931
4932/*
4933 * sleep, with exponential backoff, and retry the LOCK operation.
4934 */
4935static unsigned long
4936nfs4_set_lock_task_retry(unsigned long timeout)
4937{
416ad3c9 4938 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4939 timeout <<= 1;
4940 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4941 return NFS4_LOCK_MAXTIMEOUT;
4942 return timeout;
4943}
4944
1da177e4
LT		 4945static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4946{
4947 struct inode *inode = state->inode;
4948 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4949 struct nfs_client *clp = server->nfs_client;
911d1aaf 4950 struct nfs_lockt_args arg = {
1da177e4 4951 .fh = NFS_FH(inode),
911d1aaf 4952 .fl = request,
1da177e4 4953 };
911d1aaf
TM		 4954 struct nfs_lockt_res res = {
4955 .denied = request,
1da177e4
LT		 4956 };
4957 struct rpc_message msg = {
4958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4959 .rpc_argp = &arg,
4960 .rpc_resp = &res,
4961 .rpc_cred = state->owner->so_cred,
4962 };
1da177e4
LT		 4963 struct nfs4_lock_state *lsp;
4964 int status;
4965
911d1aaf 4966 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4967 status = nfs4_set_lock_state(state, request);
4968 if (status != 0)
4969 goto out;
4970 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4971 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4972 arg.lock_owner.s_dev = server->s_dev;
7c513058 4973 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4974 switch (status) {
4975 case 0:
4976 request->fl_type = F_UNLCK;
4977 break;
4978 case -NFS4ERR_DENIED:
4979 status = 0;
1da177e4 4980 }
70cc6487 4981 request->fl_ops->fl_release_private(request);
8d0a8a9d 4982out:
1da177e4
LT		 4983 return status;
4984}
4985
4986static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4987{
4988 struct nfs4_exception exception = { };
4989 int err;
4990
4991 do {
d1b748a5
TM		 4992 err = _nfs4_proc_getlk(state, cmd, request);
4993 trace_nfs4_get_lock(request, state, cmd, err);
4994 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 4995 &exception);
4996 } while (exception.retry);
4997 return err;
4998}
4999
5000static int do_vfs_lock(struct file *file, struct file_lock *fl)
5001{
5002 int res = 0;
5003 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5004 case FL_POSIX:
5005 res = posix_lock_file_wait(file, fl);
5006 break;
5007 case FL_FLOCK:
5008 res = flock_lock_file_wait(file, fl);
5009 break;
5010 default:
5011 BUG();
5012 }
1da177e4
LT		 5013 return res;
5014}
5015
faf5f49c 5016struct nfs4_unlockdata {
911d1aaf
TM		 5017 struct nfs_locku_args arg;
5018 struct nfs_locku_res res;
faf5f49c
TM		 5019 struct nfs4_lock_state *lsp;
5020 struct nfs_open_context *ctx;
911d1aaf
TM		 5021 struct file_lock fl;
5022 const struct nfs_server *server;
26e976a8 5023 unsigned long timestamp;
faf5f49c
TM		 5024};
5025
911d1aaf
TM		 5026static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5027 struct nfs_open_context *ctx,
5028 struct nfs4_lock_state *lsp,
5029 struct nfs_seqid *seqid)
5030{
5031 struct nfs4_unlockdata *p;
5032 struct inode *inode = lsp->ls_state->inode;
5033
8535b2be 5034 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5035 if (p == NULL)
5036 return NULL;
5037 p->arg.fh = NFS_FH(inode);
5038 p->arg.fl = &p->fl;
5039 p->arg.seqid = seqid;
c1d51931 5040 p->res.seqid = seqid;
911d1aaf
TM		 5041 p->arg.stateid = &lsp->ls_stateid;
5042 p->lsp = lsp;
5043 atomic_inc(&lsp->ls_count);
5044 /* Ensure we don't close file until we're done freeing locks! */
5045 p->ctx = get_nfs_open_context(ctx);
5046 memcpy(&p->fl, fl, sizeof(p->fl));
5047 p->server = NFS_SERVER(inode);
5048 return p;
5049}
5050
06f814a3 5051static void nfs4_locku_release_calldata(void *data)
faf5f49c 5052{
963d8fe5 5053 struct nfs4_unlockdata *calldata = data;
911d1aaf 5054 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5055 nfs4_put_lock_state(calldata->lsp);
5056 put_nfs_open_context(calldata->ctx);
5057 kfree(calldata);
faf5f49c
TM		 5058}
5059
963d8fe5 5060static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5061{
963d8fe5 5062 struct nfs4_unlockdata *calldata = data;
faf5f49c 5063
14516c3a
TM		 5064 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5065 return;
faf5f49c
TM		 5066 switch (task->tk_status) {
5067 case 0:
f597c537
TM		 5068 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5069 &calldata->res.stateid);
26e976a8 5070 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5071 break;
9e33bed5
TM		 5072 case -NFS4ERR_BAD_STATEID:
5073 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5074 case -NFS4ERR_STALE_STATEID:
5075 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5076 break;
5077 default:
9e33bed5 5078 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5079 rpc_restart_call_prepare(task);
faf5f49c 5080 }
2b1bc308 5081 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5082}
5083
4ce70ada 5084static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5085{
4ce70ada 5086 struct nfs4_unlockdata *calldata = data;
faf5f49c 5087
911d1aaf 5088 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5089 goto out_wait;
795a88c9 5090 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5091 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5092 goto out_no_action;
faf5f49c 5093 }
26e976a8 5094 calldata->timestamp = jiffies;
035168ab 5095 if (nfs4_setup_sequence(calldata->server,
a893693c 5096 &calldata->arg.seq_args,
2240a9e2
TM		 5097 &calldata->res.seq_res,
5098 task) != 0)
5099 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5100 return;
5101out_no_action:
5102 task->tk_action = NULL;
5103out_wait:
5104 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5105}
5106
963d8fe5 5107static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5108 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5109 .rpc_call_done = nfs4_locku_done,
06f814a3 5110 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5111};
5112
a5d16a4d
TM		 5113static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5114 struct nfs_open_context *ctx,
5115 struct nfs4_lock_state *lsp,
5116 struct nfs_seqid *seqid)
5117{
5118 struct nfs4_unlockdata *data;
5138fde0
TM		 5119 struct rpc_message msg = {
5120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5121 .rpc_cred = ctx->cred,
5122 };
c970aa85
TM		 5123 struct rpc_task_setup task_setup_data = {
5124 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5125 .rpc_message = &msg,
c970aa85 5126 .callback_ops = &nfs4_locku_ops,
101070ca 5127 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5128 .flags = RPC_TASK_ASYNC,
5129 };
a5d16a4d 5130
137d6aca
FF		 5131 /* Ensure this is an unlock - when canceling a lock, the
5132 * canceled lock is passed in, and it won't be an unlock.
5133 */
5134 fl->fl_type = F_UNLCK;
5135
a5d16a4d
TM		 5136 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5137 if (data == NULL) {
5138 nfs_free_seqid(seqid);
5139 return ERR_PTR(-ENOMEM);
5140 }
5141
9d12b216 5142 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5143 msg.rpc_argp = &data->arg;
5144 msg.rpc_resp = &data->res;
c970aa85
TM		 5145 task_setup_data.callback_data = data;
5146 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5147}
5148
faf5f49c
TM		 5149static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5150{
65b62a29
TM		 5151 struct inode *inode = state->inode;
5152 struct nfs4_state_owner *sp = state->owner;
5153 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5154 struct nfs_seqid *seqid;
1da177e4 5155 struct nfs4_lock_state *lsp;
06f814a3
TM		 5156 struct rpc_task *task;
5157 int status = 0;
536ff0f8 5158 unsigned char fl_flags = request->fl_flags;
faf5f49c 5159
8d0a8a9d 5160 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5161 /* Unlock _before_ we do the RPC call */
5162 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5163 /* Exclude nfs_delegation_claim_locks() */
5164 mutex_lock(&sp->so_delegreturn_mutex);
5165 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5166 down_read(&nfsi->rwsem);
5167 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5168 up_read(&nfsi->rwsem);
65b62a29 5169 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5170 goto out;
19e03c57
TM		 5171 }
5172 up_read(&nfsi->rwsem);
65b62a29 5173 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5174 if (status != 0)
9b073574
TM		 5175 goto out;
5176 /* Is this a delegated lock? */
8d0a8a9d 5177 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5178 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5179 goto out;
8535b2be 5180 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5181 status = -ENOMEM;
911d1aaf 5182 if (seqid == NULL)
9b073574 5183 goto out;
cd3758e3 5184 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5185 status = PTR_ERR(task);
5186 if (IS_ERR(task))
9b073574 5187 goto out;
a5d16a4d 5188 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5189 rpc_put_task(task);
9b073574 5190out:
536ff0f8 5191 request->fl_flags = fl_flags;
d1b748a5 5192 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5193 return status;
5194}
5195
a5d16a4d
TM		 5196struct nfs4_lockdata {
5197 struct nfs_lock_args arg;
5198 struct nfs_lock_res res;
5199 struct nfs4_lock_state *lsp;
5200 struct nfs_open_context *ctx;
5201 struct file_lock fl;
26e976a8 5202 unsigned long timestamp;
a5d16a4d
TM		 5203 int rpc_status;
5204 int cancelled;
66179efe 5205 struct nfs_server *server;
a5d16a4d
TM		 5206};
5207
5208static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5209 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5210 gfp_t gfp_mask)
1da177e4 5211{
a5d16a4d
TM		 5212 struct nfs4_lockdata *p;
5213 struct inode *inode = lsp->ls_state->inode;
1da177e4 5214 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5215
8535b2be 5216 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5217 if (p == NULL)
5218 return NULL;
5219
5220 p->arg.fh = NFS_FH(inode);
5221 p->arg.fl = &p->fl;
8535b2be 5222 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5223 if (p->arg.open_seqid == NULL)
5224 goto out_free;
8535b2be 5225 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5226 if (p->arg.lock_seqid == NULL)
2f74c0a0 5227 goto out_free_seqid;
a5d16a4d 5228 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5229 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5230 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5231 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5232 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5233 p->lsp = lsp;
66179efe 5234 p->server = server;
a5d16a4d
TM		 5235 atomic_inc(&lsp->ls_count);
5236 p->ctx = get_nfs_open_context(ctx);
5237 memcpy(&p->fl, fl, sizeof(p->fl));
5238 return p;
2f74c0a0
TM		 5239out_free_seqid:
5240 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5241out_free:
5242 kfree(p);
5243 return NULL;
5244}
5245
5246static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5247{
5248 struct nfs4_lockdata *data = calldata;
5249 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5250
3110ff80 5251 dprintk("%s: begin!\n", __func__);
2f74c0a0 5252 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5253 goto out_wait;
a5d16a4d
TM		 5254 /* Do we need to do an open_to_lock_owner? */
5255 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5256 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5257 goto out_release_lock_seqid;
8fe72bac 5258 }
8e472f33 5259 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5260 data->arg.new_lock_owner = 1;
c1d51931 5261 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5262 } else
5263 data->arg.new_lock_owner = 0;
5d422301
TM		 5264 if (!nfs4_valid_open_stateid(state)) {
5265 data->rpc_status = -EBADF;
5266 task->tk_action = NULL;
5267 goto out_release_open_seqid;
5268 }
26e976a8 5269 data->timestamp = jiffies;
035168ab
TM		 5270 if (nfs4_setup_sequence(data->server,
5271 &data->arg.seq_args,
2240a9e2 5272 &data->res.seq_res,
d9afbd1b 5273 task) == 0)
66179efe 5274 return;
5d422301 5275out_release_open_seqid:
2240a9e2
TM		 5276 nfs_release_seqid(data->arg.open_seqid);
5277out_release_lock_seqid:
5278 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5279out_wait:
5280 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5281 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5282}
5283
a5d16a4d
TM		 5284static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5285{
5286 struct nfs4_lockdata *data = calldata;
5287
3110ff80 5288 dprintk("%s: begin!\n", __func__);
a5d16a4d 5289
14516c3a
TM		 5290 if (!nfs4_sequence_done(task, &data->res.seq_res))
5291 return;
66179efe 5292
a5d16a4d 5293 data->rpc_status = task->tk_status;
a5d16a4d 5294 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5295 if (data->rpc_status == 0)
5296 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5297 else
5298 goto out;
5299 }
5300 if (data->rpc_status == 0) {
f597c537 5301 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5302 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5303 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5304 }
a5d16a4d 5305out:
3110ff80 5306 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5307}
5308
5309static void nfs4_lock_release(void *calldata)
5310{
5311 struct nfs4_lockdata *data = calldata;
5312
3110ff80 5313 dprintk("%s: begin!\n", __func__);
2f74c0a0 5314 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5315 if (data->cancelled != 0) {
5316 struct rpc_task *task;
5317 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5318 data->arg.lock_seqid);
5319 if (!IS_ERR(task))
bf294b41 5320 rpc_put_task_async(task);
3110ff80 5321 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5322 } else
5323 nfs_free_seqid(data->arg.lock_seqid);
5324 nfs4_put_lock_state(data->lsp);
5325 put_nfs_open_context(data->ctx);
5326 kfree(data);
3110ff80 5327 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5328}
5329
5330static const struct rpc_call_ops nfs4_lock_ops = {
5331 .rpc_call_prepare = nfs4_lock_prepare,
5332 .rpc_call_done = nfs4_lock_done,
5333 .rpc_release = nfs4_lock_release,
5334};
5335
2bee72a6
TM		 5336static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5337{
2bee72a6
TM		 5338 switch (error) {
5339 case -NFS4ERR_ADMIN_REVOKED:
5340 case -NFS4ERR_BAD_STATEID:
ecac799a 5341 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5342 if (new_lock_owner != 0 ||
795a88c9 5343 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5344 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5345 break;
5346 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5347 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5348 case -NFS4ERR_EXPIRED:
5349 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5350 };
5351}
5352
afe6c27c 5353static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5354{
5355 struct nfs4_lockdata *data;
5356 struct rpc_task *task;
5138fde0
TM		 5357 struct rpc_message msg = {
5358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5359 .rpc_cred = state->owner->so_cred,
5360 };
c970aa85
TM		 5361 struct rpc_task_setup task_setup_data = {
5362 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5363 .rpc_message = &msg,
c970aa85 5364 .callback_ops = &nfs4_lock_ops,
101070ca 5365 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5366 .flags = RPC_TASK_ASYNC,
5367 };
a5d16a4d
TM		 5368 int ret;
5369
3110ff80 5370 dprintk("%s: begin!\n", __func__);
cd3758e3 5371 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5372 fl->fl_u.nfs4_fl.owner,
5373 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5374 if (data == NULL)
5375 return -ENOMEM;
5376 if (IS_SETLKW(cmd))
5377 data->arg.block = 1;
9d12b216 5378 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5379 msg.rpc_argp = &data->arg;
5380 msg.rpc_resp = &data->res;
c970aa85 5381 task_setup_data.callback_data = data;
8fe72bac
TM		 5382 if (recovery_type > NFS_LOCK_NEW) {
5383 if (recovery_type == NFS_LOCK_RECLAIM)
5384 data->arg.reclaim = NFS_LOCK_RECLAIM;
5385 nfs4_set_sequence_privileged(&data->arg.seq_args);
5386 }
c970aa85 5387 task = rpc_run_task(&task_setup_data);
7a1218a2 5388 if (IS_ERR(task))
a5d16a4d 5389 return PTR_ERR(task);
a5d16a4d
TM		 5390 ret = nfs4_wait_for_completion_rpc_task(task);
5391 if (ret == 0) {
5392 ret = data->rpc_status;
2bee72a6
TM		 5393 if (ret)
5394 nfs4_handle_setlk_error(data->server, data->lsp,
5395 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5396 } else
5397 data->cancelled = 1;
e6b3c4db 5398 rpc_put_task(task);
3110ff80 5399 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5400 return ret;
1da177e4
LT		 5401}
5402
5403static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5404{
202b50dc 5405 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5406 struct nfs4_exception exception = {
5407 .inode = state->inode,
5408 };
202b50dc
TM		 5409 int err;
5410
5411 do {
42a2d13e
TM		 5412 /* Cache the lock if possible... */
5413 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5414 return 0;
afe6c27c 5415 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5416 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5417 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5418 break;
5419 nfs4_handle_exception(server, err, &exception);
5420 } while (exception.retry);
5421 return err;
1da177e4
LT		 5422}
5423
5424static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5425{
202b50dc 5426 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5427 struct nfs4_exception exception = {
5428 .inode = state->inode,
5429 };
202b50dc
TM		 5430 int err;
5431
6bfc93ef
TM		 5432 err = nfs4_set_lock_state(state, request);
5433 if (err != 0)
5434 return err;
202b50dc 5435 do {
42a2d13e
TM		 5436 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5437 return 0;
afe6c27c 5438 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5439 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5440 switch (err) {
5441 default:
5442 goto out;
5443 case -NFS4ERR_GRACE:
5444 case -NFS4ERR_DELAY:
5445 nfs4_handle_exception(server, err, &exception);
5446 err = 0;
5447 }
202b50dc 5448 } while (exception.retry);
a9ed2e25 5449out:
202b50dc 5450 return err;
1da177e4
LT		 5451}
5452
f062eb6c 5453#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5454/**
5455 * nfs41_check_expired_locks - possibly free a lock stateid
5456 *
5457 * @state: NFSv4 state for an inode
5458 *
5459 * Returns NFS_OK if recovery for this stateid is now finished.
5460 * Otherwise a negative NFS4ERR value is returned.
5461 */
b01dd1d8 5462static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5463{
eb64cf96 5464 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5465 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5466 struct nfs_server *server = NFS_SERVER(state->inode);
5467
b01dd1d8 5468 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5469 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5470 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5471
5472 status = nfs41_test_stateid(server,
5473 &lsp->ls_stateid,
5474 cred);
b01dd1d8 5475 if (status != NFS_OK) {
3e60ffdd
CL		 5476 /* Free the stateid unless the server
5477 * informs us the stateid is unrecognized. */
89af2739
CL		 5478 if (status != -NFS4ERR_BAD_STATEID)
5479 nfs41_free_stateid(server,
ab7cb0df
TM		 5480 &lsp->ls_stateid,
5481 cred);
795a88c9 5482 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5483 ret = status;
5484 }
5485 }
5486 };
5487
5488 return ret;
5489}
5490
5491static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5492{
5493 int status = NFS_OK;
5494
5495 if (test_bit(LK_STATE_IN_USE, &state->flags))
5496 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5497 if (status != NFS_OK)
5498 status = nfs4_lock_expired(state, request);
5499 return status;
f062eb6c
BS		 5500}
5501#endif
5502
1da177e4
LT		 5503static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5504{
9a99af49 5505 struct nfs4_state_owner *sp = state->owner;
19e03c57 5506 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5507 unsigned char fl_flags = request->fl_flags;
9a99af49 5508 unsigned int seq;
8e469ebd 5509 int status = -ENOLCK;
1da177e4 5510
8e469ebd
TM		 5511 if ((fl_flags & FL_POSIX) &&
5512 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5513 goto out;
6bfc93ef 5514 /* Is this a delegated open? */
6bfc93ef
TM		 5515 status = nfs4_set_lock_state(state, request);
5516 if (status != 0)
5517 goto out;
01c3b861
TM		 5518 request->fl_flags |= FL_ACCESS;
5519 status = do_vfs_lock(request->fl_file, request);
5520 if (status < 0)
5521 goto out;
19e03c57 5522 down_read(&nfsi->rwsem);
01c3b861 5523 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5524 /* Yes: cache locks! */
01c3b861 5525 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5526 request->fl_flags = fl_flags & ~FL_SLEEP;
5527 status = do_vfs_lock(request->fl_file, request);
5528 goto out_unlock;
01c3b861 5529 }
9a99af49
TM		 5530 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5531 up_read(&nfsi->rwsem);
afe6c27c 5532 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5533 if (status != 0)
9a99af49
TM		 5534 goto out;
5535 down_read(&nfsi->rwsem);
5536 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5537 status = -NFS4ERR_DELAY;
01c3b861 5538 goto out_unlock;
9a99af49 5539 }
6bfc93ef 5540 /* Note: we always want to sleep here! */
01c3b861 5541 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5542 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5543 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5544 "manager!\n", __func__);
01c3b861 5545out_unlock:
19e03c57 5546 up_read(&nfsi->rwsem);
01c3b861
TM		 5547out:
5548 request->fl_flags = fl_flags;
1da177e4
LT		 5549 return status;
5550}
5551
5552static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5553{
a1d0b5ee
TM		 5554 struct nfs4_exception exception = {
5555 .state = state,
05ffe24f 5556 .inode = state->inode,
a1d0b5ee 5557 };
1da177e4
LT		 5558 int err;
5559
5560 do {
965b5d67 5561 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5562 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5563 if (err == -NFS4ERR_DENIED)
5564 err = -EAGAIN;
1da177e4 5565 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5566 err, &exception);
1da177e4
LT		 5567 } while (exception.retry);
5568 return err;
5569}
5570
5571static int
5572nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5573{
5574 struct nfs_open_context *ctx;
5575 struct nfs4_state *state;
5576 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5577 int status;
5578
5579 /* verify open state */
cd3758e3 5580 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5581 state = ctx->state;
5582
5583 if (request->fl_start < 0 || request->fl_end < 0)
5584 return -EINVAL;
5585
d953126a
TM		 5586 if (IS_GETLK(cmd)) {
5587 if (state != NULL)
5588 return nfs4_proc_getlk(state, F_GETLK, request);
5589 return 0;
5590 }
1da177e4
LT		 5591
5592 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5593 return -EINVAL;
5594
d953126a
TM		 5595 if (request->fl_type == F_UNLCK) {
5596 if (state != NULL)
5597 return nfs4_proc_unlck(state, cmd, request);
5598 return 0;
5599 }
1da177e4 5600
d953126a
TM		 5601 if (state == NULL)
5602 return -ENOLCK;
55725513
TM		 5603 /*
5604 * Don't rely on the VFS having checked the file open mode,
5605 * since it won't do this for flock() locks.
5606 */
f44106e2 5607 switch (request->fl_type) {
55725513
TM		 5608 case F_RDLCK:
5609 if (!(filp->f_mode & FMODE_READ))
5610 return -EBADF;
5611 break;
5612 case F_WRLCK:
5613 if (!(filp->f_mode & FMODE_WRITE))
5614 return -EBADF;
5615 }
5616
1da177e4
LT		 5617 do {
5618 status = nfs4_proc_setlk(state, cmd, request);
5619 if ((status != -EAGAIN) || IS_SETLK(cmd))
5620 break;
5621 timeout = nfs4_set_lock_task_retry(timeout);
5622 status = -ERESTARTSYS;
5623 if (signalled())
5624 break;
5625 } while(status < 0);
1da177e4
LT		 5626 return status;
5627}
5628
db4f2e63 5629int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5630{
5631 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5632 int err;
5633
5634 err = nfs4_set_lock_state(state, fl);
5635 if (err != 0)
db4f2e63 5636 return err;
4a706fa0 5637 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5638 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5639}
6b3b5496 5640
cf470c3e
TM		 5641struct nfs_release_lockowner_data {
5642 struct nfs4_lock_state *lsp;
5ae67c4f 5643 struct nfs_server *server;
cf470c3e
TM		 5644 struct nfs_release_lockowner_args args;
5645};
5646
d3c7b7cc
TM		 5647static void nfs4_release_lockowner_release(void *calldata)
5648{
cf470c3e 5649 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5650 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5651 kfree(calldata);
5652}
5653
17280175 5654static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5655 .rpc_release = nfs4_release_lockowner_release,
5656};
5657
c8b2d0bf 5658static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5659{
cf470c3e 5660 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5661 struct rpc_message msg = {
5662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5663 };
5664
5665 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5666 return -EINVAL;
5667 data = kmalloc(sizeof(*data), GFP_NOFS);
5668 if (!data)
5669 return -ENOMEM;
5670 data->lsp = lsp;
5ae67c4f 5671 data->server = server;
cf470c3e
TM		 5672 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5673 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5674 data->args.lock_owner.s_dev = server->s_dev;
5675 msg.rpc_argp = &data->args;
5676 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5677 return 0;
d3c7b7cc
TM		 5678}
5679
aa1870af
BF		 5680#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5681
64c2ce8b
AK		 5682static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5683 const void *buf, size_t buflen,
5684 int flags, int type)
6b3b5496 5685{
64c2ce8b
AK		 5686 if (strcmp(key, "") != 0)
5687 return -EINVAL;
4b580ee3 5688
64c2ce8b 5689 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5690}
5691
64c2ce8b
AK		 5692static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5693 void *buf, size_t buflen, int type)
6b3b5496 5694{
64c2ce8b
AK		 5695 if (strcmp(key, "") != 0)
5696 return -EINVAL;
aa1870af 5697
64c2ce8b 5698 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5699}
5700
64c2ce8b
AK		 5701static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5702 size_t list_len, const char *name,
5703 size_t name_len, int type)
6b3b5496 5704{
64c2ce8b 5705 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5706
096455a2
BF		 5707 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5708 return 0;
64c2ce8b
AK		 5709
5710 if (list && len <= list_len)
5711 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5712 return len;
6b3b5496
BF		 5713}
5714
c9bccef6
DQ		 5715#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5716static inline int nfs4_server_supports_labels(struct nfs_server *server)
5717{
5718 return server->caps & NFS_CAP_SECURITY_LABEL;
5719}
5720
5721static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5722 const void *buf, size_t buflen,
5723 int flags, int type)
5724{
5725 if (security_ismaclabel(key))
5726 return nfs4_set_security_label(dentry, buf, buflen);
5727
5728 return -EOPNOTSUPP;
5729}
5730
5731static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5732 void *buf, size_t buflen, int type)
5733{
5734 if (security_ismaclabel(key))
5735 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5736 return -EOPNOTSUPP;
5737}
5738
5739static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5740 size_t list_len, const char *name,
5741 size_t name_len, int type)
5742{
5743 size_t len = 0;
5744
5745 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5746 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5747 if (list && len <= list_len)
5748 security_inode_listsecurity(dentry->d_inode, list, len);
5749 }
5750 return len;
5751}
5752
5753static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5754 .prefix = XATTR_SECURITY_PREFIX,
5755 .list = nfs4_xattr_list_nfs4_label,
5756 .get = nfs4_xattr_get_nfs4_label,
5757 .set = nfs4_xattr_set_nfs4_label,
5758};
5759#endif
5760
5761
533eb461
AA		 5762/*
5763 * nfs_fhget will use either the mounted_on_fileid or the fileid
5764 */
69aaaae1
TM		 5765static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5766{
533eb461
AA		 5767 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5768 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5769 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5770 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5771 return;
5772
5773 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5774 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5775 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5776 fattr->nlink = 2;
5777}
5778
f05d147f
BS		 5779static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5780 const struct qstr *name,
5781 struct nfs4_fs_locations *fs_locations,
5782 struct page *page)
683b57b4
TM		 5783{
5784 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5785 u32 bitmask[3] = {
361e624f 5786 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5787 };
5788 struct nfs4_fs_locations_arg args = {
5789 .dir_fh = NFS_FH(dir),
c228fd3a 5790 .name = name,
683b57b4
TM		 5791 .page = page,
5792 .bitmask = bitmask,
5793 };
22958463
BH		 5794 struct nfs4_fs_locations_res res = {
5795 .fs_locations = fs_locations,
5796 };
683b57b4
TM		 5797 struct rpc_message msg = {
5798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5799 .rpc_argp = &args,
22958463 5800 .rpc_resp = &res,
683b57b4
TM		 5801 };
5802 int status;
5803
3110ff80 5804 dprintk("%s: start\n", __func__);
533eb461
AA		 5805
5806 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5807 * is not supported */
5808 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5809 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5810 else
5811 bitmask[0] |= FATTR4_WORD0_FILEID;
5812
c228fd3a 5813 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5814 fs_locations->server = server;
830b8e33 5815 fs_locations->nlocations = 0;
f05d147f 5816 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5817 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5818 return status;
5819}
5820
f05d147f
BS		 5821int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5822 const struct qstr *name,
5823 struct nfs4_fs_locations *fs_locations,
5824 struct page *page)
db0a9593
BS		 5825{
5826 struct nfs4_exception exception = { };
5827 int err;
5828 do {
078ea3df
TM		 5829 err = _nfs4_proc_fs_locations(client, dir, name,
5830 fs_locations, page);
5831 trace_nfs4_get_fs_locations(dir, name, err);
5832 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5833 &exception);
5834 } while (exception.retry);
5835 return err;
5836}
5837
5ec16a85
AA		 5838/**
5839 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
5840 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
5841 */
5a5ea0d4
BS		 5842static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5843{
5844 int status;
5845 struct nfs4_secinfo_arg args = {
5846 .dir_fh = NFS_FH(dir),
5847 .name = name,
5848 };
5849 struct nfs4_secinfo_res res = {
5850 .flavors = flavors,
5851 };
5852 struct rpc_message msg = {
5853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5854 .rpc_argp = &args,
5855 .rpc_resp = &res,
5856 };
5ec16a85 5857 struct rpc_clnt *clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5a5ea0d4
BS		 5858
5859 dprintk("NFS call secinfo %s\n", name->name);
5ec16a85 5860 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5a5ea0d4
BS		 5861 dprintk("NFS reply secinfo: %d\n", status);
5862 return status;
5863}
5864
72de53ec
BS		 5865int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5866 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5867{
5868 struct nfs4_exception exception = { };
5869 int err;
5870 do {
078ea3df
TM		 5871 err = _nfs4_proc_secinfo(dir, name, flavors);
5872 trace_nfs4_secinfo(dir, name, err);
5873 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5874 &exception);
5875 } while (exception.retry);
5876 return err;
5877}
5878
557134a3 5879#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5880/*
5881 * Check the exchange flags returned by the server for invalid flags, having
5882 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5883 * DS flags set.
5884 */
5885static int nfs4_check_cl_exchange_flags(u32 flags)
5886{
5887 if (flags & ~EXCHGID4_FLAG_MASK_R)
5888 goto out_inval;
5889 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5890 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5891 goto out_inval;
5892 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5893 goto out_inval;
5894 return NFS_OK;
5895out_inval:
5896 return -NFS4ERR_INVAL;
5897}
5898
78fe0f41 5899static bool
79d4e1f0
CL		 5900nfs41_same_server_scope(struct nfs41_server_scope *a,
5901 struct nfs41_server_scope *b)
78fe0f41
WAA		 5902{
5903 if (a->server_scope_sz == b->server_scope_sz &&
5904 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5905 return true;
5906
5907 return false;
5908}
5909
7c44f1ae
WAA		 5910/*
5911 * nfs4_proc_bind_conn_to_session()
5912 *
5913 * The 4.1 client currently uses the same TCP connection for the
5914 * fore and backchannel.
5915 */
2cf047c9 5916int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5917{
5918 int status;
5919 struct nfs41_bind_conn_to_session_res res;
5920 struct rpc_message msg = {
5921 .rpc_proc =
5922 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5923 .rpc_argp = clp,
5924 .rpc_resp = &res,
2cf047c9 5925 .rpc_cred = cred,
7c44f1ae
WAA		 5926 };
5927
5928 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5929
5930 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5931 if (unlikely(res.session == NULL)) {
5932 status = -ENOMEM;
5933 goto out;
5934 }
5935
5936 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5937 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5938 if (status == 0) {
5939 if (memcmp(res.session->sess_id.data,
5940 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5941 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5942 status = -EIO;
5943 goto out_session;
5944 }
5945 if (res.dir != NFS4_CDFS4_BOTH) {
5946 dprintk("NFS: %s: Unexpected direction from server\n",
5947 __func__);
5948 status = -EIO;
5949 goto out_session;
5950 }
5951 if (res.use_conn_in_rdma_mode) {
5952 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5953 __func__);
5954 status = -EIO;
5955 goto out_session;
5956 }
5957 }
5958out_session:
5959 kfree(res.session);
5960out:
5961 dprintk("<-- %s status= %d\n", __func__, status);
5962 return status;
5963}
5964
99fe60d0
BH		 5965/*
5966 * nfs4_proc_exchange_id()
5967 *
6bbb4ae8
CL		 5968 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5969 *
99fe60d0
BH		 5970 * Since the clientid has expired, all compounds using sessions
5971 * associated with the stale clientid will be returning
5972 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5973 * be in some phase of session reset.
5974 */
4d643d1d 5975int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5976{
5977 nfs4_verifier verifier;
5978 struct nfs41_exchange_id_args args = {
cd93710e 5979 .verifier = &verifier,
99fe60d0 5980 .client = clp,
4f0b429d
TM		 5981 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5982 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5983 };
5984 struct nfs41_exchange_id_res res = {
32b01310 5985 0
99fe60d0
BH		 5986 };
5987 int status;
5988 struct rpc_message msg = {
5989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5990 .rpc_argp = &args,
5991 .rpc_resp = &res,
5992 .rpc_cred = cred,
5993 };
99fe60d0 5994
f092075d 5995 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5996 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5997 sizeof(args.id));
6bbb4ae8
CL		 5998 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5999 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6000 args.id_len, args.id);
99fe60d0 6001
acdeb69d 6002 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6003 GFP_NOFS);
acdeb69d 6004 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6005 status = -ENOMEM;
6006 goto out;
6007 }
78fe0f41 6008
79d4e1f0 6009 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6010 GFP_NOFS);
177313f1 6011 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6012 status = -ENOMEM;
acdeb69d 6013 goto out_server_owner;
abe9a6d5 6014 }
78fe0f41 6015
bbafffd2 6016 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6017 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6018 status = -ENOMEM;
6019 goto out_server_scope;
6020 }
6021
1bd714f2 6022 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6023 trace_nfs4_exchange_id(clp, status);
177313f1 6024 if (status == 0)
32b01310 6025 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6026
acdeb69d 6027 if (status == 0) {
32b01310
TM		 6028 clp->cl_clientid = res.clientid;
6029 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6030 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6031 clp->cl_seqid = res.seqid;
6032
acdeb69d
CL		 6033 kfree(clp->cl_serverowner);
6034 clp->cl_serverowner = res.server_owner;
6035 res.server_owner = NULL;
78fe0f41 6036
7d2ed9ac 6037 /* use the most recent implementation id */
59155546
CL		 6038 kfree(clp->cl_implid);
6039 clp->cl_implid = res.impl_id;
7d2ed9ac 6040
177313f1 6041 if (clp->cl_serverscope != NULL &&
79d4e1f0 6042 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6043 res.server_scope)) {
6044 dprintk("%s: server_scope mismatch detected\n",
6045 __func__);
6046 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6047 kfree(clp->cl_serverscope);
6048 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6049 }
6050
177313f1 6051 if (clp->cl_serverscope == NULL) {
79d4e1f0 6052 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6053 goto out;
6054 }
32b01310
TM		 6055 } else
6056 kfree(res.impl_id);
7d2ed9ac 6057
acdeb69d
CL		 6058out_server_owner:
6059 kfree(res.server_owner);
7d2ed9ac 6060out_server_scope:
abe9a6d5
WAA		 6061 kfree(res.server_scope);
6062out:
177313f1 6063 if (clp->cl_implid != NULL)
6bbb4ae8 6064 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6065 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6066 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6067 clp->cl_implid->date.seconds,
6068 clp->cl_implid->date.nseconds);
6bbb4ae8 6069 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6070 return status;
6071}
6072
66245539
TM		 6073static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6074 struct rpc_cred *cred)
6075{
6076 struct rpc_message msg = {
6077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6078 .rpc_argp = clp,
6079 .rpc_cred = cred,
6080 };
6081 int status;
6082
6083 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6084 trace_nfs4_destroy_clientid(clp, status);
66245539 6085 if (status)
02c67525 6086 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6087 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6088 return status;
6089}
6090
6091static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6092 struct rpc_cred *cred)
6093{
6094 unsigned int loop;
6095 int ret;
6096
6097 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6098 ret = _nfs4_proc_destroy_clientid(clp, cred);
6099 switch (ret) {
6100 case -NFS4ERR_DELAY:
6101 case -NFS4ERR_CLIENTID_BUSY:
6102 ssleep(1);
6103 break;
6104 default:
6105 return ret;
6106 }
6107 }
6108 return 0;
6109}
6110
6111int nfs4_destroy_clientid(struct nfs_client *clp)
6112{
6113 struct rpc_cred *cred;
6114 int ret = 0;
6115
6116 if (clp->cl_mvops->minor_version < 1)
6117 goto out;
6118 if (clp->cl_exchange_flags == 0)
6119 goto out;
05f4c350
CL		 6120 if (clp->cl_preserve_clid)
6121 goto out;
73d8bde5 6122 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6123 ret = nfs4_proc_destroy_clientid(clp, cred);
6124 if (cred)
6125 put_rpccred(cred);
6126 switch (ret) {
6127 case 0:
6128 case -NFS4ERR_STALE_CLIENTID:
6129 clp->cl_exchange_flags = 0;
6130 }
6131out:
6132 return ret;
6133}
6134
2050f0cc
AA		 6135struct nfs4_get_lease_time_data {
6136 struct nfs4_get_lease_time_args *args;
6137 struct nfs4_get_lease_time_res *res;
6138 struct nfs_client *clp;
6139};
6140
6141static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6142 void *calldata)
6143{
2050f0cc
AA		 6144 struct nfs4_get_lease_time_data *data =
6145 (struct nfs4_get_lease_time_data *)calldata;
6146
6147 dprintk("--> %s\n", __func__);
6148 /* just setup sequence, do not trigger session recovery
6149 since we're invoked within one */
d9afbd1b
TM		 6150 nfs41_setup_sequence(data->clp->cl_session,
6151 &data->args->la_seq_args,
6152 &data->res->lr_seq_res,
6153 task);
2050f0cc
AA		 6154 dprintk("<-- %s\n", __func__);
6155}
6156
6157/*
6158 * Called from nfs4_state_manager thread for session setup, so don't recover
6159 * from sequence operation or clientid errors.
6160 */
6161static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6162{
6163 struct nfs4_get_lease_time_data *data =
6164 (struct nfs4_get_lease_time_data *)calldata;
6165
6166 dprintk("--> %s\n", __func__);
14516c3a
TM		 6167 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6168 return;
2050f0cc
AA		 6169 switch (task->tk_status) {
6170 case -NFS4ERR_DELAY:
6171 case -NFS4ERR_GRACE:
6172 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6173 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6174 task->tk_status = 0;
a8a4ae3a
AA		 6175 /* fall through */
6176 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6177 rpc_restart_call_prepare(task);
2050f0cc
AA		 6178 return;
6179 }
2050f0cc
AA		 6180 dprintk("<-- %s\n", __func__);
6181}
6182
17280175 6183static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6184 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6185 .rpc_call_done = nfs4_get_lease_time_done,
6186};
6187
6188int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6189{
6190 struct rpc_task *task;
6191 struct nfs4_get_lease_time_args args;
6192 struct nfs4_get_lease_time_res res = {
6193 .lr_fsinfo = fsinfo,
6194 };
6195 struct nfs4_get_lease_time_data data = {
6196 .args = &args,
6197 .res = &res,
6198 .clp = clp,
6199 };
6200 struct rpc_message msg = {
6201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6202 .rpc_argp = &args,
6203 .rpc_resp = &res,
6204 };
6205 struct rpc_task_setup task_setup = {
6206 .rpc_client = clp->cl_rpcclient,
6207 .rpc_message = &msg,
6208 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6209 .callback_data = &data,
6210 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6211 };
6212 int status;
6213
9d12b216 6214 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6215 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6216 dprintk("--> %s\n", __func__);
6217 task = rpc_run_task(&task_setup);
6218
6219 if (IS_ERR(task))
6220 status = PTR_ERR(task);
6221 else {
6222 status = task->tk_status;
6223 rpc_put_task(task);
6224 }
6225 dprintk("<-- %s return %d\n", __func__, status);
6226
6227 return status;
6228}
6229
fc931582
AA		 6230/*
6231 * Initialize the values to be used by the client in CREATE_SESSION
6232 * If nfs4_init_session set the fore channel request and response sizes,
6233 * use them.
6234 *
6235 * Set the back channel max_resp_sz_cached to zero to force the client to
6236 * always set csa_cachethis to FALSE because the current implementation
6237 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6238 */
6239static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6240{
18aad3d5
AA		 6241 unsigned int max_rqst_sz, max_resp_sz;
6242
6243 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6244 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6245
fc931582 6246 /* Fore channel attributes */
18aad3d5
AA		 6247 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6248 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6249 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6250 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6251
6252 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6253 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6254 __func__,
6255 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6256 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6257
6258 /* Back channel attributes */
fc931582
AA		 6259 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6260 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6261 args->bc_attrs.max_resp_sz_cached = 0;
6262 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6263 args->bc_attrs.max_reqs = 1;
6264
6265 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6266 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6267 __func__,
6268 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6269 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6270 args->bc_attrs.max_reqs);
6271}
6272
43c2e885 6273static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6274{
43c2e885
BF		 6275 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6276 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6277
43c2e885
BF		 6278 if (rcvd->max_resp_sz > sent->max_resp_sz)
6279 return -EINVAL;
6280 /*
6281 * Our requested max_ops is the minimum we need; we're not
6282 * prepared to break up compounds into smaller pieces than that.
6283 * So, no point even trying to continue if the server won't
6284 * cooperate:
6285 */
6286 if (rcvd->max_ops < sent->max_ops)
6287 return -EINVAL;
6288 if (rcvd->max_reqs == 0)
6289 return -EINVAL;
b4b9a0c1
VG		 6290 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6291 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6292 return 0;
8d35301d
AA		 6293}
6294
43c2e885
BF		 6295static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6296{
6297 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6298 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6299
43c2e885
BF		 6300 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6301 return -EINVAL;
6302 if (rcvd->max_resp_sz < sent->max_resp_sz)
6303 return -EINVAL;
6304 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6305 return -EINVAL;
6306 /* These would render the backchannel useless: */
b4b9a0c1 6307 if (rcvd->max_ops != sent->max_ops)
43c2e885 6308 return -EINVAL;
b4b9a0c1 6309 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6310 return -EINVAL;
6311 return 0;
6312}
8d35301d 6313
8d35301d
AA		 6314static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6315 struct nfs4_session *session)
6316{
43c2e885 6317 int ret;
8d35301d 6318
43c2e885
BF		 6319 ret = nfs4_verify_fore_channel_attrs(args, session);
6320 if (ret)
6321 return ret;
6322 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6323}
6324
848f5bda
TM		 6325static int _nfs4_proc_create_session(struct nfs_client *clp,
6326 struct rpc_cred *cred)
fc931582
AA		 6327{
6328 struct nfs4_session *session = clp->cl_session;
6329 struct nfs41_create_session_args args = {
6330 .client = clp,
6331 .cb_program = NFS4_CALLBACK,
6332 };
6333 struct nfs41_create_session_res res = {
6334 .client = clp,
6335 };
6336 struct rpc_message msg = {
6337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6338 .rpc_argp = &args,
6339 .rpc_resp = &res,
848f5bda 6340 .rpc_cred = cred,
fc931582
AA		 6341 };
6342 int status;
6343
6344 nfs4_init_channel_attrs(&args);
0f91421e 6345 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6346
1bd714f2 6347 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6348 trace_nfs4_create_session(clp, status);
fc931582 6349
43095d39 6350 if (!status) {
8d35301d
AA		 6351 /* Verify the session's negotiated channel_attrs values */
6352 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6353 /* Increment the clientid slot sequence id */
6354 clp->cl_seqid++;
6355 }
6356
6357 return status;
6358}
6359
6360/*
6361 * Issues a CREATE_SESSION operation to the server.
6362 * It is the responsibility of the caller to verify the session is
6363 * expired before calling this routine.
6364 */
848f5bda 6365int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6366{
6367 int status;
6368 unsigned *ptr;
fc931582
AA		 6369 struct nfs4_session *session = clp->cl_session;
6370
6371 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6372
848f5bda 6373 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6374 if (status)
6375 goto out;
6376
aacd5537
AA		 6377 /* Init or reset the session slot tables */
6378 status = nfs4_setup_session_slot_tables(session);
6379 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6380 if (status)
6381 goto out;
6382
6383 ptr = (unsigned *)&session->sess_id.data[0];
6384 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6385 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6386out:
6387 dprintk("<-- %s\n", __func__);
6388 return status;
6389}
6390
0f3e66c6
AA		 6391/*
6392 * Issue the over-the-wire RPC DESTROY_SESSION.
6393 * The caller must serialize access to this routine.
6394 */
848f5bda
TM		 6395int nfs4_proc_destroy_session(struct nfs4_session *session,
6396 struct rpc_cred *cred)
0f3e66c6 6397{
848f5bda
TM		 6398 struct rpc_message msg = {
6399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6400 .rpc_argp = session,
6401 .rpc_cred = cred,
6402 };
0f3e66c6 6403 int status = 0;
0f3e66c6
AA		 6404
6405 dprintk("--> nfs4_proc_destroy_session\n");
6406
6407 /* session is still being setup */
6408 if (session->clp->cl_cons_state != NFS_CS_READY)
6409 return status;
6410
1bd714f2 6411 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6412 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6413
6414 if (status)
08106ac7 6415 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6416 "Session has been destroyed regardless...\n", status);
6417
6418 dprintk("<-- nfs4_proc_destroy_session\n");
6419 return status;
6420}
6421
fc01cea9
AA		 6422/*
6423 * Renew the cl_session lease.
6424 */
d5f8d3fe
TM		 6425struct nfs4_sequence_data {
6426 struct nfs_client *clp;
6427 struct nfs4_sequence_args args;
6428 struct nfs4_sequence_res res;
6429};
6430
dc96aef9
AB		 6431static void nfs41_sequence_release(void *data)
6432{
d5f8d3fe
TM		 6433 struct nfs4_sequence_data *calldata = data;
6434 struct nfs_client *clp = calldata->clp;
dc96aef9 6435
7135840f
AB		 6436 if (atomic_read(&clp->cl_count) > 1)
6437 nfs4_schedule_state_renewal(clp);
6438 nfs_put_client(clp);
d5f8d3fe 6439 kfree(calldata);
dc96aef9
AB		 6440}
6441
aa5190d0
TM		 6442static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6443{
6444 switch(task->tk_status) {
6445 case -NFS4ERR_DELAY:
aa5190d0
TM		 6446 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6447 return -EAGAIN;
6448 default:
0400a6b0 6449 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6450 }
6451 return 0;
6452}
6453
dc96aef9 6454static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6455{
d5f8d3fe
TM		 6456 struct nfs4_sequence_data *calldata = data;
6457 struct nfs_client *clp = calldata->clp;
fc01cea9 6458
14516c3a
TM		 6459 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6460 return;
fc01cea9 6461
c6d01c6f 6462 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6463 if (task->tk_status < 0) {
6464 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6465 if (atomic_read(&clp->cl_count) == 1)
6466 goto out;
fc01cea9 6467
aa5190d0
TM		 6468 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6469 rpc_restart_call_prepare(task);
fc01cea9
AA		 6470 return;
6471 }
6472 }
fc01cea9 6473 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6474out:
fc01cea9
AA		 6475 dprintk("<-- %s\n", __func__);
6476}
6477
6478static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6479{
d5f8d3fe
TM		 6480 struct nfs4_sequence_data *calldata = data;
6481 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6482 struct nfs4_sequence_args *args;
6483 struct nfs4_sequence_res *res;
6484
fc01cea9
AA		 6485 args = task->tk_msg.rpc_argp;
6486 res = task->tk_msg.rpc_resp;
6487
d9afbd1b 6488 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6489}
6490
6491static const struct rpc_call_ops nfs41_sequence_ops = {
6492 .rpc_call_done = nfs41_sequence_call_done,
6493 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6494 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6495};
6496
8fe72bac
TM		 6497static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6498 struct rpc_cred *cred,
6499 bool is_privileged)
fc01cea9 6500{
d5f8d3fe 6501 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6502 struct rpc_message msg = {
6503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6504 .rpc_cred = cred,
6505 };
71ac6da9
TM		 6506 struct rpc_task_setup task_setup_data = {
6507 .rpc_client = clp->cl_rpcclient,
6508 .rpc_message = &msg,
8fe72bac 6509 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6510 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6511 };
fc01cea9 6512
7135840f 6513 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6514 return ERR_PTR(-EIO);
dfb4f309 6515 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6516 if (calldata == NULL) {
7135840f 6517 nfs_put_client(clp);
71ac6da9 6518 return ERR_PTR(-ENOMEM);
fc01cea9 6519 }
9d12b216 6520 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6521 if (is_privileged)
6522 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6523 msg.rpc_argp = &calldata->args;
6524 msg.rpc_resp = &calldata->res;
6525 calldata->clp = clp;
71ac6da9 6526 task_setup_data.callback_data = calldata;
fc01cea9 6527
71ac6da9
TM		 6528 return rpc_run_task(&task_setup_data);
6529}
6530
2f60ea6b 6531static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6532{
6533 struct rpc_task *task;
6534 int ret = 0;
6535
2f60ea6b
TM		 6536 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6537 return 0;
8fe72bac 6538 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6539 if (IS_ERR(task))
6540 ret = PTR_ERR(task);
6541 else
bf294b41 6542 rpc_put_task_async(task);
71ac6da9
TM		 6543 dprintk("<-- %s status=%d\n", __func__, ret);
6544 return ret;
6545}
6546
6547static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6548{
6549 struct rpc_task *task;
6550 int ret;
6551
8fe72bac 6552 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6553 if (IS_ERR(task)) {
6554 ret = PTR_ERR(task);
6555 goto out;
6556 }
6557 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6558 if (!ret) {
6559 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6560
6561 if (task->tk_status == 0)
6562 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6563 ret = task->tk_status;
b4410c2f 6564 }
71ac6da9
TM		 6565 rpc_put_task(task);
6566out:
6567 dprintk("<-- %s status=%d\n", __func__, ret);
6568 return ret;
fc01cea9
AA		 6569}
6570
fce5c838
RL		 6571struct nfs4_reclaim_complete_data {
6572 struct nfs_client *clp;
6573 struct nfs41_reclaim_complete_args arg;
6574 struct nfs41_reclaim_complete_res res;
6575};
6576
6577static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6578{
6579 struct nfs4_reclaim_complete_data *calldata = data;
6580
d9afbd1b
TM		 6581 nfs41_setup_sequence(calldata->clp->cl_session,
6582 &calldata->arg.seq_args,
6583 &calldata->res.seq_res,
6584 task);
fce5c838
RL		 6585}
6586
aa5190d0
TM		 6587static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6588{
6589 switch(task->tk_status) {
6590 case 0:
6591 case -NFS4ERR_COMPLETE_ALREADY:
6592 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6593 break;
6594 case -NFS4ERR_DELAY:
aa5190d0 6595 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6596 /* fall through */
6597 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6598 return -EAGAIN;
6599 default:
0400a6b0 6600 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6601 }
6602 return 0;
6603}
6604
fce5c838
RL		 6605static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6606{
6607 struct nfs4_reclaim_complete_data *calldata = data;
6608 struct nfs_client *clp = calldata->clp;
6609 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6610
6611 dprintk("--> %s\n", __func__);
14516c3a
TM		 6612 if (!nfs41_sequence_done(task, res))
6613 return;
fce5c838 6614
c6d01c6f 6615 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6616 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6617 rpc_restart_call_prepare(task);
6618 return;
6619 }
fce5c838
RL		 6620 dprintk("<-- %s\n", __func__);
6621}
6622
6623static void nfs4_free_reclaim_complete_data(void *data)
6624{
6625 struct nfs4_reclaim_complete_data *calldata = data;
6626
6627 kfree(calldata);
6628}
6629
6630static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6631 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6632 .rpc_call_done = nfs4_reclaim_complete_done,
6633 .rpc_release = nfs4_free_reclaim_complete_data,
6634};
6635
6636/*
6637 * Issue a global reclaim complete.
6638 */
965e9c23
TM		 6639static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6640 struct rpc_cred *cred)
fce5c838
RL		 6641{
6642 struct nfs4_reclaim_complete_data *calldata;
6643 struct rpc_task *task;
6644 struct rpc_message msg = {
6645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6646 .rpc_cred = cred,
fce5c838
RL		 6647 };
6648 struct rpc_task_setup task_setup_data = {
6649 .rpc_client = clp->cl_rpcclient,
6650 .rpc_message = &msg,
6651 .callback_ops = &nfs4_reclaim_complete_call_ops,
6652 .flags = RPC_TASK_ASYNC,
6653 };
6654 int status = -ENOMEM;
6655
6656 dprintk("--> %s\n", __func__);
8535b2be 6657 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6658 if (calldata == NULL)
6659 goto out;
6660 calldata->clp = clp;
6661 calldata->arg.one_fs = 0;
fce5c838 6662
9d12b216 6663 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6664 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6665 msg.rpc_argp = &calldata->arg;
6666 msg.rpc_resp = &calldata->res;
6667 task_setup_data.callback_data = calldata;
6668 task = rpc_run_task(&task_setup_data);
acf82b85 6669 if (IS_ERR(task)) {
fce5c838 6670 status = PTR_ERR(task);
acf82b85
DC		 6671 goto out;
6672 }
c34c32ea
AA		 6673 status = nfs4_wait_for_completion_rpc_task(task);
6674 if (status == 0)
6675 status = task->tk_status;
fce5c838 6676 rpc_put_task(task);
acf82b85 6677 return 0;
fce5c838
RL		 6678out:
6679 dprintk("<-- %s status=%d\n", __func__, status);
6680 return status;
6681}
b1f69b75
AA		 6682
6683static void
6684nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6685{
6686 struct nfs4_layoutget *lgp = calldata;
c31663d4 6687 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6688 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6689
6690 dprintk("--> %s\n", __func__);
c31663d4
FI		 6691 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6692 * right now covering the LAYOUTGET we are about to send.
6693 * However, that is not so catastrophic, and there seems
6694 * to be no way to prevent it completely.
6695 */
6ba7db34 6696 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6697 &lgp->res.seq_res, task))
b1f69b75 6698 return;
cf7d63f1
FI		 6699 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6700 NFS_I(lgp->args.inode)->layout,
6701 lgp->args.ctx->state)) {
6702 rpc_exit(task, NFS4_OK);
cf7d63f1 6703 }
b1f69b75
AA		 6704}
6705
6706static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6707{
6708 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6709 struct inode *inode = lgp->args.inode;
6710 struct nfs_server *server = NFS_SERVER(inode);
6711 struct pnfs_layout_hdr *lo;
6712 struct nfs4_state *state = NULL;
30005121 6713 unsigned long timeo, giveup;
b1f69b75
AA		 6714
6715 dprintk("--> %s\n", __func__);
6716
6ba7db34 6717 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6718 goto out;
b1f69b75
AA		 6719
6720 switch (task->tk_status) {
6721 case 0:
ee314c2a 6722 goto out;
b1f69b75
AA		 6723 case -NFS4ERR_LAYOUTTRYLATER:
6724 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6725 timeo = rpc_get_timeout(task->tk_client);
6726 giveup = lgp->args.timestamp + timeo;
6727 if (time_after(giveup, jiffies))
6728 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6729 break;
6730 case -NFS4ERR_EXPIRED:
6731 case -NFS4ERR_BAD_STATEID:
6732 spin_lock(&inode->i_lock);
6733 lo = NFS_I(inode)->layout;
6734 if (!lo || list_empty(&lo->plh_segs)) {
6735 spin_unlock(&inode->i_lock);
6736 /* If the open stateid was bad, then recover it. */
6737 state = lgp->args.ctx->state;
6738 } else {
6739 LIST_HEAD(head);
6740
6741 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6742 spin_unlock(&inode->i_lock);
6743 /* Mark the bad layout state as invalid, then
6744 * retry using the open stateid. */
6745 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6746 }
6747 }
ee314c2a
TM		 6748 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6749 rpc_restart_call_prepare(task);
6750out:
b1f69b75
AA		 6751 dprintk("<-- %s\n", __func__);
6752}
6753
8554116e
IK		 6754static size_t max_response_pages(struct nfs_server *server)
6755{
6756 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6757 return nfs_page_array_len(0, max_resp_sz);
6758}
6759
6760static void nfs4_free_pages(struct page **pages, size_t size)
6761{
6762 int i;
6763
6764 if (!pages)
6765 return;
6766
6767 for (i = 0; i < size; i++) {
6768 if (!pages[i])
6769 break;
6770 __free_page(pages[i]);
6771 }
6772 kfree(pages);
6773}
6774
6775static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6776{
6777 struct page **pages;
6778 int i;
6779
6780 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6781 if (!pages) {
6782 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6783 return NULL;
6784 }
6785
6786 for (i = 0; i < size; i++) {
6787 pages[i] = alloc_page(gfp_flags);
6788 if (!pages[i]) {
6789 dprintk("%s: failed to allocate page\n", __func__);
6790 nfs4_free_pages(pages, size);
6791 return NULL;
6792 }
6793 }
6794
6795 return pages;
6796}
6797
b1f69b75
AA		 6798static void nfs4_layoutget_release(void *calldata)
6799{
6800 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6801 struct inode *inode = lgp->args.inode;
6802 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6803 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6804
6805 dprintk("--> %s\n", __func__);
8554116e 6806 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6807 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6808 put_nfs_open_context(lgp->args.ctx);
6809 kfree(calldata);
6810 dprintk("<-- %s\n", __func__);
6811}
6812
6813static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6814 .rpc_call_prepare = nfs4_layoutget_prepare,
6815 .rpc_call_done = nfs4_layoutget_done,
6816 .rpc_release = nfs4_layoutget_release,
6817};
6818
a0b0a6e3
TM		 6819struct pnfs_layout_segment *
6820nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6821{
a47970ff
WAA		 6822 struct inode *inode = lgp->args.inode;
6823 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6824 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6825 struct rpc_task *task;
6826 struct rpc_message msg = {
6827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6828 .rpc_argp = &lgp->args,
6829 .rpc_resp = &lgp->res,
6ab59344 6830 .rpc_cred = lgp->cred,
b1f69b75
AA		 6831 };
6832 struct rpc_task_setup task_setup_data = {
6833 .rpc_client = server->client,
6834 .rpc_message = &msg,
6835 .callback_ops = &nfs4_layoutget_call_ops,
6836 .callback_data = lgp,
6837 .flags = RPC_TASK_ASYNC,
6838 };
a0b0a6e3 6839 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6840 int status = 0;
6841
6842 dprintk("--> %s\n", __func__);
6843
8554116e
IK		 6844 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6845 if (!lgp->args.layout.pages) {
6846 nfs4_layoutget_release(lgp);
a0b0a6e3 6847 return ERR_PTR(-ENOMEM);
8554116e
IK		 6848 }
6849 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6850 lgp->args.timestamp = jiffies;
8554116e 6851
35124a09 6852 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6853 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6854 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6855
6856 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6857 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6858
b1f69b75
AA		 6859 task = rpc_run_task(&task_setup_data);
6860 if (IS_ERR(task))
a0b0a6e3 6861 return ERR_CAST(task);
b1f69b75 6862 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6863 if (status == 0)
6864 status = task->tk_status;
1037e6ea
TM		 6865 trace_nfs4_layoutget(lgp->args.ctx,
6866 &lgp->args.range,
6867 &lgp->res.range,
6868 status);
085b7a45
WAA		 6869 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6870 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6871 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6872 rpc_put_task(task);
6873 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6874 if (status)
6875 return ERR_PTR(status);
6876 return lseg;
b1f69b75
AA		 6877}
6878
cbe82603
BH		 6879static void
6880nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6881{
6882 struct nfs4_layoutreturn *lrp = calldata;
6883
6884 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6885 nfs41_setup_sequence(lrp->clp->cl_session,
6886 &lrp->args.seq_args,
6887 &lrp->res.seq_res,
6888 task);
cbe82603
BH		 6889}
6890
6891static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6892{
6893 struct nfs4_layoutreturn *lrp = calldata;
6894 struct nfs_server *server;
6895
6896 dprintk("--> %s\n", __func__);
6897
6ba7db34 6898 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6899 return;
6900
6901 server = NFS_SERVER(lrp->args.inode);
6902 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6903 rpc_restart_call_prepare(task);
cbe82603
BH		 6904 return;
6905 }
cbe82603
BH		 6906 dprintk("<-- %s\n", __func__);
6907}
6908
6909static void nfs4_layoutreturn_release(void *calldata)
6910{
6911 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6912 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6913
6914 dprintk("--> %s\n", __func__);
849b286f
TM		 6915 spin_lock(&lo->plh_inode->i_lock);
6916 if (lrp->res.lrs_present)
6917 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6918 lo->plh_block_lgets--;
6919 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6920 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6921 kfree(calldata);
6922 dprintk("<-- %s\n", __func__);
6923}
6924
6925static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6926 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6927 .rpc_call_done = nfs4_layoutreturn_done,
6928 .rpc_release = nfs4_layoutreturn_release,
6929};
6930
6931int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6932{
6933 struct rpc_task *task;
6934 struct rpc_message msg = {
6935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6936 .rpc_argp = &lrp->args,
6937 .rpc_resp = &lrp->res,
9556000d 6938 .rpc_cred = lrp->cred,
cbe82603
BH		 6939 };
6940 struct rpc_task_setup task_setup_data = {
1771c577 6941 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6942 .rpc_message = &msg,
6943 .callback_ops = &nfs4_layoutreturn_call_ops,
6944 .callback_data = lrp,
6945 };
6946 int status;
6947
6948 dprintk("--> %s\n", __func__);
9d12b216 6949 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6950 task = rpc_run_task(&task_setup_data);
6951 if (IS_ERR(task))
6952 return PTR_ERR(task);
6953 status = task->tk_status;
1037e6ea 6954 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 6955 dprintk("<-- %s status=%d\n", __func__, status);
6956 rpc_put_task(task);
6957 return status;
6958}
6959
7f11d8d3
AA		 6960/*
6961 * Retrieve the list of Data Server devices from the MDS.
6962 */
6963static int _nfs4_getdevicelist(struct nfs_server *server,
6964 const struct nfs_fh *fh,
6965 struct pnfs_devicelist *devlist)
6966{
6967 struct nfs4_getdevicelist_args args = {
6968 .fh = fh,
6969 .layoutclass = server->pnfs_curr_ld->id,
6970 };
6971 struct nfs4_getdevicelist_res res = {
6972 .devlist = devlist,
6973 };
6974 struct rpc_message msg = {
6975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6976 .rpc_argp = &args,
6977 .rpc_resp = &res,
6978 };
6979 int status;
6980
6981 dprintk("--> %s\n", __func__);
6982 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6983 &res.seq_res, 0);
6984 dprintk("<-- %s status=%d\n", __func__, status);
6985 return status;
6986}
6987
6988int nfs4_proc_getdevicelist(struct nfs_server *server,
6989 const struct nfs_fh *fh,
6990 struct pnfs_devicelist *devlist)
6991{
6992 struct nfs4_exception exception = { };
6993 int err;
6994
6995 do {
6996 err = nfs4_handle_exception(server,
6997 _nfs4_getdevicelist(server, fh, devlist),
6998 &exception);
6999 } while (exception.retry);
7000
7001 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7002 err, devlist->num_devs);
7003
7004 return err;
7005}
7006EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7007
b1f69b75 7008static int
cd5875fe
TM		 7009_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7010 struct pnfs_device *pdev,
7011 struct rpc_cred *cred)
b1f69b75
AA		 7012{
7013 struct nfs4_getdeviceinfo_args args = {
7014 .pdev = pdev,
7015 };
7016 struct nfs4_getdeviceinfo_res res = {
7017 .pdev = pdev,
7018 };
7019 struct rpc_message msg = {
7020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7021 .rpc_argp = &args,
7022 .rpc_resp = &res,
cd5875fe 7023 .rpc_cred = cred,
b1f69b75
AA		 7024 };
7025 int status;
7026
7027 dprintk("--> %s\n", __func__);
7c513058 7028 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7029 dprintk("<-- %s status=%d\n", __func__, status);
7030
7031 return status;
7032}
7033
cd5875fe
TM		 7034int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7035 struct pnfs_device *pdev,
7036 struct rpc_cred *cred)
b1f69b75
AA		 7037{
7038 struct nfs4_exception exception = { };
7039 int err;
7040
7041 do {
7042 err = nfs4_handle_exception(server,
cd5875fe 7043 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7044 &exception);
7045 } while (exception.retry);
7046 return err;
7047}
7048EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7049
863a3c6c
AA		 7050static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7051{
7052 struct nfs4_layoutcommit_data *data = calldata;
7053 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7054 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7055
d9afbd1b
TM		 7056 nfs41_setup_sequence(session,
7057 &data->args.seq_args,
7058 &data->res.seq_res,
7059 task);
863a3c6c
AA		 7060}
7061
7062static void
7063nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7064{
7065 struct nfs4_layoutcommit_data *data = calldata;
7066 struct nfs_server *server = NFS_SERVER(data->args.inode);
7067
6ba7db34 7068 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7069 return;
7070
7071 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7072 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7073 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7074 case -NFS4ERR_BADLAYOUT: /* no layout */
7075 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7076 task->tk_status = 0;
e59d27e0
TM		 7077 break;
7078 case 0:
863a3c6c
AA		 7079 nfs_post_op_update_inode_force_wcc(data->args.inode,
7080 data->res.fattr);
e59d27e0
TM		 7081 break;
7082 default:
7083 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7084 rpc_restart_call_prepare(task);
7085 return;
7086 }
7087 }
863a3c6c
AA		 7088}
7089
7090static void nfs4_layoutcommit_release(void *calldata)
7091{
7092 struct nfs4_layoutcommit_data *data = calldata;
7093
db29c089 7094 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7095 put_rpccred(data->cred);
7096 kfree(data);
7097}
7098
7099static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7100 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7101 .rpc_call_done = nfs4_layoutcommit_done,
7102 .rpc_release = nfs4_layoutcommit_release,
7103};
7104
7105int
ef311537 7106nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7107{
7108 struct rpc_message msg = {
7109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7110 .rpc_argp = &data->args,
7111 .rpc_resp = &data->res,
7112 .rpc_cred = data->cred,
7113 };
7114 struct rpc_task_setup task_setup_data = {
7115 .task = &data->task,
7116 .rpc_client = NFS_CLIENT(data->args.inode),
7117 .rpc_message = &msg,
7118 .callback_ops = &nfs4_layoutcommit_ops,
7119 .callback_data = data,
7120 .flags = RPC_TASK_ASYNC,
7121 };
7122 struct rpc_task *task;
7123 int status = 0;
7124
7125 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7126 "lbw: %llu inode %lu\n",
7127 data->task.tk_pid, sync,
7128 data->args.lastbytewritten,
7129 data->args.inode->i_ino);
7130
9d12b216 7131 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7132 task = rpc_run_task(&task_setup_data);
7133 if (IS_ERR(task))
7134 return PTR_ERR(task);
ef311537 7135 if (sync == false)
863a3c6c
AA		 7136 goto out;
7137 status = nfs4_wait_for_completion_rpc_task(task);
7138 if (status != 0)
7139 goto out;
7140 status = task->tk_status;
1037e6ea 7141 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7142out:
7143 dprintk("%s: status %d\n", __func__, status);
7144 rpc_put_task(task);
7145 return status;
7146}
fca78d6d 7147
97431204
AA		 7148/**
7149 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7150 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7151 */
fca78d6d
BS		 7152static int
7153_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7154 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7155{
7156 struct nfs41_secinfo_no_name_args args = {
7157 .style = SECINFO_STYLE_CURRENT_FH,
7158 };
7159 struct nfs4_secinfo_res res = {
7160 .flavors = flavors,
7161 };
7162 struct rpc_message msg = {
7163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7164 .rpc_argp = &args,
7165 .rpc_resp = &res,
7166 };
97431204
AA		 7167 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7168 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7169}
7170
7171static int
7172nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7173 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7174{
7175 struct nfs4_exception exception = { };
7176 int err;
7177 do {
7178 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7179 switch (err) {
7180 case 0:
7181 case -NFS4ERR_WRONGSEC:
7182 case -NFS4ERR_NOTSUPP:
05e9cfb4 7183 goto out;
fca78d6d
BS		 7184 default:
7185 err = nfs4_handle_exception(server, err, &exception);
7186 }
7187 } while (exception.retry);
05e9cfb4 7188out:
fca78d6d
BS		 7189 return err;
7190}
7191
7192static int
7193nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7194 struct nfs_fsinfo *info)
7195{
7196 int err;
7197 struct page *page;
7198 rpc_authflavor_t flavor;
7199 struct nfs4_secinfo_flavors *flavors;
7200
7201 page = alloc_page(GFP_KERNEL);
7202 if (!page) {
7203 err = -ENOMEM;
7204 goto out;
7205 }
7206
7207 flavors = page_address(page);
7208 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7209
7210 /*
7211 * Fall back on "guess and check" method if
7212 * the server doesn't support SECINFO_NO_NAME
7213 */
7214 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7215 err = nfs4_find_root_sec(server, fhandle, info);
7216 goto out_freepage;
7217 }
7218 if (err)
7219 goto out_freepage;
7220
7221 flavor = nfs_find_best_sec(flavors);
7222 if (err == 0)
7223 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7224
7225out_freepage:
7226 put_page(page);
7227 if (err == -EACCES)
7228 return -EPERM;
7229out:
7230 return err;
7231}
1cab0652 7232
ab7cb0df
TM		 7233static int _nfs41_test_stateid(struct nfs_server *server,
7234 nfs4_stateid *stateid,
7235 struct rpc_cred *cred)
7d974794
BS		 7236{
7237 int status;
7238 struct nfs41_test_stateid_args args = {
1cab0652 7239 .stateid = stateid,
7d974794
BS		 7240 };
7241 struct nfs41_test_stateid_res res;
7242 struct rpc_message msg = {
7243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7244 .rpc_argp = &args,
7245 .rpc_resp = &res,
ab7cb0df 7246 .rpc_cred = cred,
7d974794 7247 };
1cab0652 7248
38527b15 7249 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7250 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7251 nfs4_set_sequence_privileged(&args.seq_args);
7252 status = nfs4_call_sync_sequence(server->client, server, &msg,
7253 &args.seq_args, &res.seq_res);
38527b15
CL		 7254 if (status != NFS_OK) {
7255 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7256 return status;
38527b15
CL		 7257 }
7258 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7259 return -res.status;
7d974794
BS		 7260}
7261
38527b15
CL		 7262/**
7263 * nfs41_test_stateid - perform a TEST_STATEID operation
7264 *
7265 * @server: server / transport on which to perform the operation
7266 * @stateid: state ID to test
ab7cb0df 7267 * @cred: credential
38527b15
CL		 7268 *
7269 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7270 * Otherwise a negative NFS4ERR value is returned if the operation
7271 * failed or the state ID is not currently valid.
7272 */
ab7cb0df
TM		 7273static int nfs41_test_stateid(struct nfs_server *server,
7274 nfs4_stateid *stateid,
7275 struct rpc_cred *cred)
7d974794
BS		 7276{
7277 struct nfs4_exception exception = { };
7278 int err;
7279 do {
ab7cb0df 7280 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7281 if (err != -NFS4ERR_DELAY)
7282 break;
7283 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7284 } while (exception.retry);
7285 return err;
7286}
9aeda35f 7287
7c1d5fae
TM		 7288struct nfs_free_stateid_data {
7289 struct nfs_server *server;
7290 struct nfs41_free_stateid_args args;
9aeda35f 7291 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7292};
7293
7294static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7295{
7296 struct nfs_free_stateid_data *data = calldata;
7297 nfs41_setup_sequence(nfs4_get_session(data->server),
7298 &data->args.seq_args,
7299 &data->res.seq_res,
7300 task);
7301}
7302
7303static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7304{
7305 struct nfs_free_stateid_data *data = calldata;
7306
7307 nfs41_sequence_done(task, &data->res.seq_res);
7308
7309 switch (task->tk_status) {
7310 case -NFS4ERR_DELAY:
7311 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7312 rpc_restart_call_prepare(task);
7313 }
7314}
7315
7316static void nfs41_free_stateid_release(void *calldata)
7317{
7318 kfree(calldata);
7319}
7320
17f26b12 7321static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7322 .rpc_call_prepare = nfs41_free_stateid_prepare,
7323 .rpc_call_done = nfs41_free_stateid_done,
7324 .rpc_release = nfs41_free_stateid_release,
7325};
7326
7327static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7328 nfs4_stateid *stateid,
ab7cb0df 7329 struct rpc_cred *cred,
7c1d5fae
TM		 7330 bool privileged)
7331{
9aeda35f
BS		 7332 struct rpc_message msg = {
7333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7334 .rpc_cred = cred,
9aeda35f 7335 };
7c1d5fae
TM		 7336 struct rpc_task_setup task_setup = {
7337 .rpc_client = server->client,
7338 .rpc_message = &msg,
7339 .callback_ops = &nfs41_free_stateid_ops,
7340 .flags = RPC_TASK_ASYNC,
7341 };
7342 struct nfs_free_stateid_data *data;
9aeda35f 7343
38527b15 7344 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7345 data = kmalloc(sizeof(*data), GFP_NOFS);
7346 if (!data)
7347 return ERR_PTR(-ENOMEM);
7348 data->server = server;
7349 nfs4_stateid_copy(&data->args.stateid, stateid);
7350
7351 task_setup.callback_data = data;
7352
7353 msg.rpc_argp = &data->args;
7354 msg.rpc_resp = &data->res;
7355 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7356 if (privileged)
7357 nfs4_set_sequence_privileged(&data->args.seq_args);
7358
7359 return rpc_run_task(&task_setup);
9aeda35f
BS		 7360}
7361
38527b15
CL		 7362/**
7363 * nfs41_free_stateid - perform a FREE_STATEID operation
7364 *
7365 * @server: server / transport on which to perform the operation
7366 * @stateid: state ID to release
ab7cb0df 7367 * @cred: credential
38527b15
CL		 7368 *
7369 * Returns NFS_OK if the server freed "stateid". Otherwise a
7370 * negative NFS4ERR value is returned.
7371 */
ab7cb0df
TM		 7372static int nfs41_free_stateid(struct nfs_server *server,
7373 nfs4_stateid *stateid,
7374 struct rpc_cred *cred)
9aeda35f 7375{
7c1d5fae
TM		 7376 struct rpc_task *task;
7377 int ret;
7378
ab7cb0df 7379 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7380 if (IS_ERR(task))
7381 return PTR_ERR(task);
7382 ret = rpc_wait_for_completion_task(task);
7383 if (!ret)
7384 ret = task->tk_status;
7385 rpc_put_task(task);
7386 return ret;
9aeda35f 7387}
36281caa 7388
c8b2d0bf
TM		 7389static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7390{
7391 struct rpc_task *task;
ab7cb0df 7392 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7393
ab7cb0df 7394 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7395 nfs4_free_lock_state(server, lsp);
7396 if (IS_ERR(task))
7397 return PTR_ERR(task);
7398 rpc_put_task(task);
7399 return 0;
7400}
7401
36281caa
TM		 7402static bool nfs41_match_stateid(const nfs4_stateid *s1,
7403 const nfs4_stateid *s2)
7404{
2d2f24ad 7405 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7406 return false;
7407
2d2f24ad 7408 if (s1->seqid == s2->seqid)
36281caa 7409 return true;
2d2f24ad 7410 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7411 return true;
7412
7413 return false;
7414}
7415
557134a3
AA		 7416#endif /* CONFIG_NFS_V4_1 */
7417
36281caa
TM		 7418static bool nfs4_match_stateid(const nfs4_stateid *s1,
7419 const nfs4_stateid *s2)
7420{
f597c537 7421 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7422}
7423
7424
17280175 7425static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7426 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7427 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7428 .recover_open = nfs4_open_reclaim,
7429 .recover_lock = nfs4_lock_reclaim,
591d71cb 7430 .establish_clid = nfs4_init_clientid,
05f4c350 7431 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7432};
7433
591d71cb 7434#if defined(CONFIG_NFS_V4_1)
17280175 7435static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7436 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7437 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7438 .recover_open = nfs4_open_reclaim,
7439 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7440 .establish_clid = nfs41_init_clientid,
fce5c838 7441 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7442 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7443};
7444#endif /* CONFIG_NFS_V4_1 */
7445
17280175 7446static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7447 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7448 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7449 .recover_open = nfs4_open_expired,
7450 .recover_lock = nfs4_lock_expired,
7451 .establish_clid = nfs4_init_clientid,
7452};
7453
7454#if defined(CONFIG_NFS_V4_1)
17280175 7455static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7456 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7457 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7458 .recover_open = nfs41_open_expired,
7459 .recover_lock = nfs41_lock_expired,
4d643d1d 7460 .establish_clid = nfs41_init_clientid,
1da177e4 7461};
591d71cb 7462#endif /* CONFIG_NFS_V4_1 */
1da177e4 7463
17280175 7464static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7465 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7466 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7467 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7468};
7469
7470#if defined(CONFIG_NFS_V4_1)
17280175 7471static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7472 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7473 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7474 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7475};
7476#endif
7477
97dc1359
TM		 7478static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7479 .minor_version = 0,
39c6daae
TM		 7480 .init_caps = NFS_CAP_READDIRPLUS
7481 | NFS_CAP_ATOMIC_OPEN
7482 | NFS_CAP_CHANGE_ATTR
7483 | NFS_CAP_POSIX_LOCK,
97dc1359 7484 .call_sync = _nfs4_call_sync,
36281caa 7485 .match_stateid = nfs4_match_stateid,
fca78d6d 7486 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7487 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7488 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7489 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7490 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7491};
7492
7493#if defined(CONFIG_NFS_V4_1)
7494static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7495 .minor_version = 1,
39c6daae
TM		 7496 .init_caps = NFS_CAP_READDIRPLUS
7497 | NFS_CAP_ATOMIC_OPEN
7498 | NFS_CAP_CHANGE_ATTR
3b66486c 7499 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7500 | NFS_CAP_STATEID_NFSV41
7501 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7502 .call_sync = nfs4_call_sync_sequence,
36281caa 7503 .match_stateid = nfs41_match_stateid,
fca78d6d 7504 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7505 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7506 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7507 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7508 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7509};
7510#endif
7511
42c2c424
SD		 7512#if defined(CONFIG_NFS_V4_2)
7513static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7514 .minor_version = 2,
7017310a
BS		 7515 .init_caps = NFS_CAP_READDIRPLUS
7516 | NFS_CAP_ATOMIC_OPEN
7517 | NFS_CAP_CHANGE_ATTR
7518 | NFS_CAP_POSIX_LOCK
7519 | NFS_CAP_STATEID_NFSV41
7520 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7521 .call_sync = nfs4_call_sync_sequence,
7522 .match_stateid = nfs41_match_stateid,
7523 .find_root_sec = nfs41_find_root_sec,
7017310a 7524 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7525 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7526 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7527 .state_renewal_ops = &nfs41_state_renewal_ops,
7528};
7529#endif
7530
97dc1359
TM		 7531const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7532 [0] = &nfs_v4_0_minor_ops,
7533#if defined(CONFIG_NFS_V4_1)
7534 [1] = &nfs_v4_1_minor_ops,
7535#endif
42c2c424
SD		 7536#if defined(CONFIG_NFS_V4_2)
7537 [2] = &nfs_v4_2_minor_ops,
7538#endif
97dc1359
TM		 7539};
7540
17f26b12 7541static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7542 .create = nfs_create,
7543 .lookup = nfs_lookup,
7544 .atomic_open = nfs_atomic_open,
7545 .link = nfs_link,
7546 .unlink = nfs_unlink,
7547 .symlink = nfs_symlink,
7548 .mkdir = nfs_mkdir,
7549 .rmdir = nfs_rmdir,
7550 .mknod = nfs_mknod,
7551 .rename = nfs_rename,
7552 .permission = nfs_permission,
7553 .getattr = nfs_getattr,
7554 .setattr = nfs_setattr,
7555 .getxattr = generic_getxattr,
7556 .setxattr = generic_setxattr,
7557 .listxattr = generic_listxattr,
7558 .removexattr = generic_removexattr,
7559};
7560
92e1d5be 7561static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7562 .permission = nfs_permission,
7563 .getattr = nfs_getattr,
7564 .setattr = nfs_setattr,
64c2ce8b
AK		 7565 .getxattr = generic_getxattr,
7566 .setxattr = generic_setxattr,
7567 .listxattr = generic_listxattr,
7568 .removexattr = generic_removexattr,
6b3b5496
BF		 7569};
7570
509de811 7571const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7572 .version = 4, /* protocol version */
7573 .dentry_ops = &nfs4_dentry_operations,
7574 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7575 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7576 .file_ops = &nfs4_file_operations,
1da177e4 7577 .getroot = nfs4_proc_get_root,
281cad46 7578 .submount = nfs4_submount,
ff9099f2 7579 .try_mount = nfs4_try_mount,
1da177e4
LT		 7580 .getattr = nfs4_proc_getattr,
7581 .setattr = nfs4_proc_setattr,
7582 .lookup = nfs4_proc_lookup,
7583 .access = nfs4_proc_access,
7584 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7585 .create = nfs4_proc_create,
7586 .remove = nfs4_proc_remove,
7587 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7588 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7589 .unlink_done = nfs4_proc_unlink_done,
7590 .rename = nfs4_proc_rename,
d3d4152a 7591 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7592 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7593 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7594 .link = nfs4_proc_link,
7595 .symlink = nfs4_proc_symlink,
7596 .mkdir = nfs4_proc_mkdir,
7597 .rmdir = nfs4_proc_remove,
7598 .readdir = nfs4_proc_readdir,
7599 .mknod = nfs4_proc_mknod,
7600 .statfs = nfs4_proc_statfs,
7601 .fsinfo = nfs4_proc_fsinfo,
7602 .pathconf = nfs4_proc_pathconf,
e9326dca 7603 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7604 .decode_dirent = nfs4_decode_dirent,
7605 .read_setup = nfs4_proc_read_setup,
1abb5088 7606 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7607 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7608 .read_done = nfs4_read_done,
1da177e4 7609 .write_setup = nfs4_proc_write_setup,
57208fa7 7610 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7611 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7612 .write_done = nfs4_write_done,
1da177e4 7613 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7614 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7615 .commit_done = nfs4_commit_done,
1da177e4 7616 .lock = nfs4_proc_lock,
e50a1c2e 7617 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7618 .close_context = nfs4_close_context,
2b484297 7619 .open_context = nfs4_atomic_open,
011e2a7f 7620 .have_delegation = nfs4_have_delegation,
57ec14c5 7621 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7622 .alloc_client = nfs4_alloc_client,
45a52a02 7623 .init_client = nfs4_init_client,
cdb7eced 7624 .free_client = nfs4_free_client,
1179acc6
BS		 7625 .create_server = nfs4_create_server,
7626 .clone_server = nfs_clone_server,
1da177e4
LT		 7627};
7628
64c2ce8b
AK		 7629static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7630 .prefix = XATTR_NAME_NFSV4_ACL,
7631 .list = nfs4_xattr_list_nfs4_acl,
7632 .get = nfs4_xattr_get_nfs4_acl,
7633 .set = nfs4_xattr_set_nfs4_acl,
7634};
7635
7636const struct xattr_handler *nfs4_xattr_handlers[] = {
7637 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7638#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7639 &nfs4_xattr_nfs4_label_handler,
7640#endif
64c2ce8b
AK		 7641 NULL
7642};
7643
1da177e4
LT		 7644/*
7645 * Local variables:
7646 * c-basic-offset: 8
7647 * End:
7648 */
Linux 6.x block layer and io_uring tree(s)