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NFSv4: Add tracepoints for debugging getattr
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315
BS		 154 case -NFS4ERR_WRONGSEC:
155 return -EPERM;
3ddeb7c5
TM		 156 case -NFS4ERR_BADOWNER:
157 case -NFS4ERR_BADNAME:
158 return -EINVAL;
fb13bfa7
TM		 159 case -NFS4ERR_SHARE_DENIED:
160 return -EACCES;
f25efd85
SD		 161 case -NFS4ERR_MINOR_VERS_MISMATCH:
162 return -EPROTONOSUPPORT;
6168f62c
WAA		 163 case -NFS4ERR_ACCESS:
164 return -EACCES;
6e3cf241
TM		 165 case -NFS4ERR_FILE_OPEN:
166 return -EBUSY;
52567b03 167 default:
1da177e4 168 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 169 __func__, -err);
52567b03 170 break;
1da177e4 171 }
52567b03 172 return -EIO;
1da177e4
LT		 173}
174
175/*
176 * This is our standard bitmap for GETATTR requests.
177 */
1549210f 178const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 179 FATTR4_WORD0_TYPE
180 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_SIZE
182 | FATTR4_WORD0_FSID
183 | FATTR4_WORD0_FILEID,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 192 | FATTR4_WORD1_TIME_MODIFY,
193#ifdef CONFIG_NFS_V4_SECURITY_LABEL
194 FATTR4_WORD2_SECURITY_LABEL
195#endif
1da177e4
LT		 196};
197
1549210f
TM		 198static const u32 nfs4_pnfs_open_bitmap[3] = {
199 FATTR4_WORD0_TYPE
200 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_SIZE
202 | FATTR4_WORD0_FSID
203 | FATTR4_WORD0_FILEID,
204 FATTR4_WORD1_MODE
205 | FATTR4_WORD1_NUMLINKS
206 | FATTR4_WORD1_OWNER
207 | FATTR4_WORD1_OWNER_GROUP
208 | FATTR4_WORD1_RAWDEV
209 | FATTR4_WORD1_SPACE_USED
210 | FATTR4_WORD1_TIME_ACCESS
211 | FATTR4_WORD1_TIME_METADATA
212 | FATTR4_WORD1_TIME_MODIFY,
213 FATTR4_WORD2_MDSTHRESHOLD
214};
215
e23008ec
AA		 216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
a09df2ca 222const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
a09df2ca 231const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
dae100c2 237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
55b6e774 241 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 244};
245
a09df2ca 246const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 247 FATTR4_WORD0_TYPE
248 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_SIZE
250 | FATTR4_WORD0_FSID
251 | FATTR4_WORD0_FILEID
252 | FATTR4_WORD0_FS_LOCATIONS,
253 FATTR4_WORD1_MODE
254 | FATTR4_WORD1_NUMLINKS
255 | FATTR4_WORD1_OWNER
256 | FATTR4_WORD1_OWNER_GROUP
257 | FATTR4_WORD1_RAWDEV
258 | FATTR4_WORD1_SPACE_USED
259 | FATTR4_WORD1_TIME_ACCESS
260 | FATTR4_WORD1_TIME_METADATA
261 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 262 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 263};
264
bc4785cd 265static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 266 struct nfs4_readdir_arg *readdir)
267{
0dbb4c67 268 __be32 *start, *p;
1da177e4 269
1da177e4 270 if (cookie > 2) {
b7ef1956 271 readdir->cookie = cookie;
1da177e4
LT		 272 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
273 return;
274 }
275
276 readdir->cookie = 0;
277 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
278 if (cookie == 2)
279 return;
280
281 /*
282 * NFSv4 servers do not return entries for '.' and '..'
283 * Therefore, we fake these entries here. We let '.'
284 * have cookie 0 and '..' have cookie 1. Note that
285 * when talking to the server, we always send cookie 0
286 * instead of 1 or 2.
287 */
2b86ce2d 288 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 289
290 if (cookie == 0) {
291 *p++ = xdr_one; /* next */
292 *p++ = xdr_zero; /* cookie, first word */
293 *p++ = xdr_one; /* cookie, second word */
294 *p++ = xdr_one; /* entry len */
295 memcpy(p, ".\0\0\0", 4); /* entry */
296 p++;
297 *p++ = xdr_one; /* bitmap length */
298 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
299 *p++ = htonl(8); /* attribute buffer length */
4e769b93 300 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 301 }
302
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_two; /* cookie, second word */
306 *p++ = xdr_two; /* entry len */
307 memcpy(p, "..\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
4e769b93 312 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 313
314 readdir->pgbase = (char *)p - (char *)start;
315 readdir->count -= readdir->pgbase;
2b86ce2d 316 kunmap_atomic(start);
1da177e4
LT		 317}
318
65de872e
TM		 319static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
320{
321 int res = 0;
322
323 might_sleep();
324
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 329 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 330 if (fatal_signal_pending(current))
331 res = -ERESTARTSYS;
332 *timeout <<= 1;
333 return res;
334}
335
336/* This is the error handling routine for processes that are allowed
337 * to sleep.
338 */
b064eca2 339static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 340{
341 struct nfs_client *clp = server->nfs_client;
9e33bed5 342 struct nfs4_state *state = exception->state;
3114ea7a 343 struct inode *inode = exception->inode;
65de872e
TM		 344 int ret = errorcode;
345
346 exception->retry = 0;
347 switch(errorcode) {
348 case 0:
349 return 0;
3114ea7a 350 case -NFS4ERR_OPENMODE:
011e2a7f 351 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 352 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 353 exception->retry = 1;
354 return 0;
355 }
356 if (state == NULL)
357 break;
5d422301
TM		 358 ret = nfs4_schedule_stateid_recovery(server, state);
359 if (ret < 0)
360 break;
3114ea7a 361 goto wait_on_recovery;
a1d0b5ee 362 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 365 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
366 nfs_remove_bad_delegation(inode);
367 exception->retry = 1;
368 break;
369 }
9e33bed5
TM		 370 if (state == NULL)
371 break;
5d422301
TM		 372 ret = nfs4_schedule_stateid_recovery(server, state);
373 if (ret < 0)
374 break;
0400a6b0 375 goto wait_on_recovery;
0ced63d1 376 case -NFS4ERR_EXPIRED:
5d422301
TM		 377 if (state != NULL) {
378 ret = nfs4_schedule_stateid_recovery(server, state);
379 if (ret < 0)
380 break;
381 }
65de872e 382 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 383 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 384 nfs4_schedule_lease_recovery(clp);
385 goto wait_on_recovery;
03391693 386#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 387 case -NFS4ERR_BADSESSION:
388 case -NFS4ERR_BADSLOT:
389 case -NFS4ERR_BAD_HIGH_SLOT:
390 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
391 case -NFS4ERR_DEADSESSION:
392 case -NFS4ERR_SEQ_FALSE_RETRY:
393 case -NFS4ERR_SEQ_MISORDERED:
394 dprintk("%s ERROR: %d Reset session\n", __func__,
395 errorcode);
9f594791 396 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 397 goto wait_on_recovery;
03391693 398#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 399 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 400 if (exception->timeout > HZ) {
401 /* We have retried a decent amount, time to
402 * fail
403 */
404 ret = -EBUSY;
405 break;
406 }
65de872e
TM		 407 case -NFS4ERR_GRACE:
408 case -NFS4ERR_DELAY:
409 ret = nfs4_delay(server->client, &exception->timeout);
410 if (ret != 0)
411 break;
a8a4ae3a 412 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 413 case -NFS4ERR_OLD_STATEID:
414 exception->retry = 1;
b064eca2
TM		 415 break;
416 case -NFS4ERR_BADOWNER:
417 /* The following works around a Linux server bug! */
418 case -NFS4ERR_BADNAME:
419 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
420 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
421 exception->retry = 1;
422 printk(KERN_WARNING "NFS: v4 server %s "
423 "does not accept raw "
424 "uid/gids. "
425 "Reenabling the idmapper.\n",
426 server->nfs_client->cl_hostname);
427 }
65de872e
TM		 428 }
429 /* We failed to handle the error */
430 return nfs4_map_errors(ret);
0400a6b0 431wait_on_recovery:
a2c0b9e2
TM		 432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret == 0)
434 exception->retry = 1;
435 return ret;
65de872e
TM		 436}
437
438
452e9352 439static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 440{
1da177e4
LT		 441 spin_lock(&clp->cl_lock);
442 if (time_before(clp->cl_last_renewal,timestamp))
443 clp->cl_last_renewal = timestamp;
444 spin_unlock(&clp->cl_lock);
445}
446
452e9352
TM		 447static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
448{
449 do_renew_lease(server->nfs_client, timestamp);
450}
451
cccef3b9
AA		 452#if defined(CONFIG_NFS_V4_1)
453
d185a334 454static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 455{
e3725ec0 456 struct nfs4_session *session;
13615871 457 struct nfs4_slot_table *tbl;
c10e4498 458 bool send_new_highest_used_slotid = false;
13615871 459
dfb4f309 460 if (!res->sr_slot) {
13615871
AA		 461 /* just wake up the next guy waiting since
462 * we may have not consumed a slot after all */
691daf3b 463 dprintk("%s: No slot\n", __func__);
35dc1d74 464 return;
13615871 465 }
e3725ec0
TM		 466 tbl = res->sr_slot->table;
467 session = tbl->session;
ea028ac9 468
35dc1d74 469 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 470 /* Be nice to the server: try to ensure that the last transmitted
471 * value for highest_user_slotid <= target_highest_slotid
472 */
473 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
474 send_new_highest_used_slotid = true;
475
b75ad4cd
TM		 476 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
477 send_new_highest_used_slotid = false;
478 goto out_unlock;
479 }
f4af6e2a 480 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 481
482 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
483 send_new_highest_used_slotid = false;
b75ad4cd 484out_unlock:
35dc1d74 485 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 486 res->sr_slot = NULL;
c10e4498
TM		 487 if (send_new_highest_used_slotid)
488 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 489}
490
14516c3a 491static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 492{
e3725ec0 493 struct nfs4_session *session;
933602e3 494 struct nfs4_slot *slot;
14516c3a 495 struct nfs_client *clp;
ac20d163 496 bool interrupted = false;
85563073 497 int ret = 1;
b0df806c 498
468f8613
BS		 499 /* don't increment the sequence number if the task wasn't sent */
500 if (!RPC_WAS_SENT(task))
b0df806c
AA		 501 goto out;
502
933602e3 503 slot = res->sr_slot;
e3725ec0 504 session = slot->table->session;
933602e3 505
ac20d163
TM		 506 if (slot->interrupted) {
507 slot->interrupted = 0;
508 interrupted = true;
509 }
510
691daf3b 511 /* Check the SEQUENCE operation status */
14516c3a
TM		 512 switch (res->sr_status) {
513 case 0:
b0df806c 514 /* Update the slot's sequence and clientid lease timer */
933602e3 515 ++slot->seq_nr;
e3725ec0 516 clp = session->clp;
8e63b6a8 517 do_renew_lease(clp, res->sr_timestamp);
0629e370 518 /* Check sequence flags */
b4410c2f
TM		 519 if (res->sr_status_flags != 0)
520 nfs4_schedule_lease_recovery(clp);
464ee9f9 521 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 522 break;
ac20d163
TM		 523 case 1:
524 /*
525 * sr_status remains 1 if an RPC level error occurred.
526 * The server may or may not have processed the sequence
527 * operation..
528 * Mark the slot as having hosted an interrupted RPC call.
529 */
530 slot->interrupted = 1;
531 goto out;
14516c3a
TM		 532 case -NFS4ERR_DELAY:
533 /* The server detected a resend of the RPC call and
534 * returned NFS4ERR_DELAY as per Section 2.10.6.2
535 * of RFC5661.
536 */
df2fabff 537 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 538 __func__,
df2fabff 539 slot->slot_nr,
933602e3 540 slot->seq_nr);
14516c3a 541 goto out_retry;
85563073
TM		 542 case -NFS4ERR_BADSLOT:
543 /*
544 * The slot id we used was probably retired. Try again
545 * using a different slot id.
546 */
e8794440
TM		 547 goto retry_nowait;
548 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 549 /*
550 * Was the last operation on this sequence interrupted?
551 * If so, retry after bumping the sequence number.
552 */
553 if (interrupted) {
554 ++slot->seq_nr;
555 goto retry_nowait;
556 }
e8794440
TM		 557 /*
558 * Could this slot have been previously retired?
559 * If so, then the server may be expecting seq_nr = 1!
560 */
8e63b6a8
TM		 561 if (slot->seq_nr != 1) {
562 slot->seq_nr = 1;
563 goto retry_nowait;
564 }
565 break;
e8794440
TM		 566 case -NFS4ERR_SEQ_FALSE_RETRY:
567 ++slot->seq_nr;
568 goto retry_nowait;
14516c3a
TM		 569 default:
570 /* Just update the slot sequence no. */
933602e3 571 ++slot->seq_nr;
b0df806c
AA		 572 }
573out:
574 /* The session may be reset by one of the error handlers. */
575 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 576 nfs41_sequence_free_slot(res);
85563073 577 return ret;
e8794440
TM		 578retry_nowait:
579 if (rpc_restart_call_prepare(task)) {
580 task->tk_status = 0;
581 ret = 0;
582 }
583 goto out;
14516c3a 584out_retry:
d05dd4e9 585 if (!rpc_restart_call(task))
14516c3a
TM		 586 goto out;
587 rpc_delay(task, NFS4_POLL_RETRY_MAX);
588 return 0;
b0df806c
AA		 589}
590
14516c3a
TM		 591static int nfs4_sequence_done(struct rpc_task *task,
592 struct nfs4_sequence_res *res)
df896455 593{
e3725ec0 594 if (res->sr_slot == NULL)
14516c3a
TM		 595 return 1;
596 return nfs41_sequence_done(task, res);
df896455
TM		 597}
598
9d12b216
TM		 599static void nfs41_init_sequence(struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res, int cache_reply)
601{
2b2fa717 602 args->sa_slot = NULL;
9d12b216 603 args->sa_cache_this = 0;
8fe72bac 604 args->sa_privileged = 0;
9d12b216
TM		 605 if (cache_reply)
606 args->sa_cache_this = 1;
9d12b216
TM		 607 res->sr_slot = NULL;
608}
609
8fe72bac
TM		 610static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
611{
612 args->sa_privileged = 1;
613}
614
dc70d7b3 615int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 616 struct nfs4_sequence_args *args,
617 struct nfs4_sequence_res *res,
ce5039c1
AA		 618 struct rpc_task *task)
619{
fbcd4abc
AA		 620 struct nfs4_slot *slot;
621 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 622
623 dprintk("--> %s\n", __func__);
ce5039c1 624 /* slot already allocated? */
dfb4f309 625 if (res->sr_slot != NULL)
d9afbd1b 626 goto out_success;
ce5039c1 627
fbcd4abc
AA		 628 tbl = &session->fc_slot_table;
629
69d206b5
TM		 630 task->tk_timeout = 0;
631
fbcd4abc 632 spin_lock(&tbl->slot_tbl_lock);
774d5f14 633 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 634 !args->sa_privileged) {
0b1c8fc4 635 /* The state manager will wait until the slot table is empty */
0b1c8fc4 636 dprintk("%s session is draining\n", __func__);
7b939a3f 637 goto out_sleep;
689cf5c1
AB		 638 }
639
2dc03b7f 640 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 641 if (IS_ERR(slot)) {
642 /* If out of memory, try again in 1/4 second */
643 if (slot == ERR_PTR(-ENOMEM))
644 task->tk_timeout = HZ >> 2;
fbcd4abc 645 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 646 goto out_sleep;
fbcd4abc
AA		 647 }
648 spin_unlock(&tbl->slot_tbl_lock);
649
2b2fa717 650 args->sa_slot = slot;
fbcd4abc 651
2dc03b7f
TM		 652 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
653 slot->slot_nr, slot->seq_nr);
fbcd4abc 654
dfb4f309 655 res->sr_slot = slot;
8e63b6a8 656 res->sr_timestamp = jiffies;
2a6e26cd 657 res->sr_status_flags = 0;
fbcd4abc
AA		 658 /*
659 * sr_status is only set in decode_sequence, and so will remain
660 * set to 1 if an rpc level failure occurs.
661 */
662 res->sr_status = 1;
d9afbd1b
TM		 663out_success:
664 rpc_call_start(task);
ce5039c1 665 return 0;
7b939a3f 666out_sleep:
8fe72bac
TM		 667 /* Privileged tasks are queued with top priority */
668 if (args->sa_privileged)
1e1093c7
TM		 669 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
670 NULL, RPC_PRIORITY_PRIVILEGED);
671 else
672 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 673 spin_unlock(&tbl->slot_tbl_lock);
674 return -EAGAIN;
ce5039c1 675}
dc70d7b3 676EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 677
035168ab 678int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
ce5039c1
AA		 681 struct rpc_task *task)
682{
035168ab 683 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 684 int ret = 0;
685
d9afbd1b
TM		 686 if (session == NULL) {
687 rpc_call_start(task);
035168ab 688 goto out;
d9afbd1b 689 }
035168ab 690
df2fabff 691 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 692 __func__, session->clp, session, res->sr_slot ?
df2fabff 693 res->sr_slot->slot_nr : -1);
ce5039c1 694
9d12b216 695 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 696out:
697 dprintk("<-- %s status=%d\n", __func__, ret);
698 return ret;
699}
700
701struct nfs41_call_sync_data {
035168ab 702 const struct nfs_server *seq_server;
ce5039c1
AA		 703 struct nfs4_sequence_args *seq_args;
704 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 705};
706
707static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
708{
709 struct nfs41_call_sync_data *data = calldata;
6ba7db34 710 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 711
035168ab
TM		 712 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
713
d9afbd1b 714 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 715}
716
69ab40c4
AA		 717static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
718{
719 struct nfs41_call_sync_data *data = calldata;
720
14516c3a 721 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 722}
723
17280175 724static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 725 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 726 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 727};
728
7c513058
BS		 729static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
730 struct nfs_server *server,
ce5039c1
AA		 731 struct rpc_message *msg,
732 struct nfs4_sequence_args *args,
8fe72bac 733 struct nfs4_sequence_res *res)
ce5039c1
AA		 734{
735 int ret;
736 struct rpc_task *task;
737 struct nfs41_call_sync_data data = {
035168ab 738 .seq_server = server,
ce5039c1
AA		 739 .seq_args = args,
740 .seq_res = res,
ce5039c1
AA		 741 };
742 struct rpc_task_setup task_setup = {
7c513058 743 .rpc_client = clnt,
ce5039c1
AA		 744 .rpc_message = msg,
745 .callback_ops = &nfs41_call_sync_ops,
746 .callback_data = &data
747 };
748
ce5039c1
AA		 749 task = rpc_run_task(&task_setup);
750 if (IS_ERR(task))
751 ret = PTR_ERR(task);
752 else {
753 ret = task->tk_status;
754 rpc_put_task(task);
755 }
756 return ret;
757}
758
df896455 759#else
8fe72bac 760static
9d12b216
TM		 761void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
763{
764}
765
8fe72bac
TM		 766static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
767{
768}
769
770
14516c3a
TM		 771static int nfs4_sequence_done(struct rpc_task *task,
772 struct nfs4_sequence_res *res)
df896455 773{
14516c3a 774 return 1;
df896455 775}
cccef3b9
AA		 776#endif /* CONFIG_NFS_V4_1 */
777
fd0c0953 778static
7c513058
BS		 779int _nfs4_call_sync(struct rpc_clnt *clnt,
780 struct nfs_server *server,
cccef3b9
AA		 781 struct rpc_message *msg,
782 struct nfs4_sequence_args *args,
fd0c0953 783 struct nfs4_sequence_res *res)
cccef3b9 784{
7c513058 785 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 786}
787
fd0c0953 788static
7c513058
BS		 789int nfs4_call_sync(struct rpc_clnt *clnt,
790 struct nfs_server *server,
e73b83f2
BS		 791 struct rpc_message *msg,
792 struct nfs4_sequence_args *args,
793 struct nfs4_sequence_res *res,
794 int cache_reply)
795{
fd0c0953 796 nfs41_init_sequence(args, res, cache_reply);
7c513058 797 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 798 args, res);
e73b83f2 799}
cccef3b9 800
38478b24 801static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 802{
38478b24 803 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 804
38478b24 805 spin_lock(&dir->i_lock);
359d7d1c 806 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 807 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 808 nfs_force_lookup_revalidate(dir);
a9a4a87a 809 dir->i_version = cinfo->after;
de242c0b 810 nfs_fscache_invalidate(dir);
38478b24 811 spin_unlock(&dir->i_lock);
1da177e4
LT		 812}
813
e56e0b78 814struct nfs4_opendata {
c6d00e63 815 struct kref kref;
e56e0b78
TM		 816 struct nfs_openargs o_arg;
817 struct nfs_openres o_res;
cdd4e68b
TM		 818 struct nfs_open_confirmargs c_arg;
819 struct nfs_open_confirmres c_res;
6926afd1
TM		 820 struct nfs4_string owner_name;
821 struct nfs4_string group_name;
e56e0b78 822 struct nfs_fattr f_attr;
1775fd3e 823 struct nfs4_label *f_label;
e56e0b78 824 struct dentry *dir;
82a2c1b7 825 struct dentry *dentry;
e56e0b78 826 struct nfs4_state_owner *owner;
aac00a8d 827 struct nfs4_state *state;
e56e0b78 828 struct iattr attrs;
26e976a8 829 unsigned long timestamp;
3e309914 830 unsigned int rpc_done : 1;
bdeca1b7 831 unsigned int is_recover : 1;
24ac23ab
TM		 832 int rpc_status;
833 int cancelled;
e56e0b78
TM		 834};
835
49f9a0fa
TM		 836static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
837 int err, struct nfs4_exception *exception)
838{
839 if (err != -EINVAL)
840 return false;
841 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
842 return false;
843 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
844 exception->retry = 1;
845 return true;
846}
847
848static enum open_claim_type4
849nfs4_map_atomic_open_claim(struct nfs_server *server,
850 enum open_claim_type4 claim)
851{
852 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
853 return claim;
854 switch (claim) {
855 default:
856 return claim;
857 case NFS4_OPEN_CLAIM_FH:
858 return NFS4_OPEN_CLAIM_NULL;
859 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
860 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
861 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
862 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
863 }
864}
2ced46c2
TM		 865
866static void nfs4_init_opendata_res(struct nfs4_opendata *p)
867{
868 p->o_res.f_attr = &p->f_attr;
1775fd3e 869 p->o_res.f_label = p->f_label;
c1d51931
TM		 870 p->o_res.seqid = p->o_arg.seqid;
871 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 872 p->o_res.server = p->o_arg.server;
5f657530 873 p->o_res.access_request = p->o_arg.access;
2ced46c2 874 nfs_fattr_init(&p->f_attr);
6926afd1 875 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 876}
877
82a2c1b7 878static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 879 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 880 const struct iattr *attrs,
1775fd3e 881 struct nfs4_label *label,
4a1c0893 882 enum open_claim_type4 claim,
8535b2be 883 gfp_t gfp_mask)
e56e0b78 884{
82a2c1b7 885 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 886 struct inode *dir = parent->d_inode;
887 struct nfs_server *server = NFS_SERVER(dir);
888 struct nfs4_opendata *p;
889
8535b2be 890 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 891 if (p == NULL)
892 goto err;
14c43f76
DQ		 893
894 p->f_label = nfs4_label_alloc(server, gfp_mask);
895 if (IS_ERR(p->f_label))
896 goto err_free_p;
897
8535b2be 898 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 899 if (p->o_arg.seqid == NULL)
14c43f76 900 goto err_free_label;
82a2c1b7
AV		 901 nfs_sb_active(dentry->d_sb);
902 p->dentry = dget(dentry);
e56e0b78
TM		 903 p->dir = parent;
904 p->owner = sp;
905 atomic_inc(&sp->so_count);
dc0b027d
TM		 906 p->o_arg.open_flags = flags;
907 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 908 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
909 * will return permission denied for all bits until close */
910 if (!(flags & O_EXCL)) {
911 /* ask server to check for all possible rights as results
912 * are cached */
913 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
914 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 915 }
7539bbab 916 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 917 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
918 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 919 p->o_arg.name = &dentry->d_name;
e56e0b78 920 p->o_arg.server = server;
aa9c2669 921 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 922 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 923 p->o_arg.label = label;
49f9a0fa
TM		 924 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
925 switch (p->o_arg.claim) {
4a1c0893
TM		 926 case NFS4_OPEN_CLAIM_NULL:
927 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
928 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
929 p->o_arg.fh = NFS_FH(dir);
930 break;
931 case NFS4_OPEN_CLAIM_PREVIOUS:
932 case NFS4_OPEN_CLAIM_FH:
933 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
934 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
935 p->o_arg.fh = NFS_FH(dentry->d_inode);
936 }
536e43d1 937 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 938 __u32 verf[2];
d77d76ff 939
e56e0b78
TM		 940 p->o_arg.u.attrs = &p->attrs;
941 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 942
943 verf[0] = jiffies;
944 verf[1] = current->pid;
945 memcpy(p->o_arg.u.verifier.data, verf,
946 sizeof(p->o_arg.u.verifier.data));
e56e0b78 947 }
cdd4e68b
TM		 948 p->c_arg.fh = &p->o_res.fh;
949 p->c_arg.stateid = &p->o_res.stateid;
950 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 951 nfs4_init_opendata_res(p);
c6d00e63 952 kref_init(&p->kref);
e56e0b78 953 return p;
14c43f76
DQ		 954
955err_free_label:
956 nfs4_label_free(p->f_label);
957err_free_p:
e56e0b78
TM		 958 kfree(p);
959err:
960 dput(parent);
961 return NULL;
962}
963
c6d00e63 964static void nfs4_opendata_free(struct kref *kref)
e56e0b78 965{
c6d00e63
TM		 966 struct nfs4_opendata *p = container_of(kref,
967 struct nfs4_opendata, kref);
82a2c1b7 968 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 969
970 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 971 if (p->state != NULL)
972 nfs4_put_open_state(p->state);
c6d00e63 973 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 974
975 nfs4_label_free(p->f_label);
976
c6d00e63 977 dput(p->dir);
82a2c1b7
AV		 978 dput(p->dentry);
979 nfs_sb_deactive(sb);
6926afd1 980 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 981 kfree(p);
982}
983
984static void nfs4_opendata_put(struct nfs4_opendata *p)
985{
986 if (p != NULL)
987 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 988}
989
06f814a3
TM		 990static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
991{
06f814a3
TM		 992 int ret;
993
06f814a3 994 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 995 return ret;
996}
997
dc0b027d 998static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 999{
1000 int ret = 0;
dc0b027d 1001
536e43d1 1002 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1003 goto out;
1004 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1005 case FMODE_READ:
88069f77
TM		 1006 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1007 && state->n_rdonly != 0;
6ee41268
TM		 1008 break;
1009 case FMODE_WRITE:
88069f77
TM		 1010 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1011 && state->n_wronly != 0;
6ee41268
TM		 1012 break;
1013 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1014 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1015 && state->n_rdwr != 0;
6ee41268 1016 }
dc0b027d 1017out:
6ee41268
TM		 1018 return ret;
1019}
1020
dc0b027d 1021static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1022{
652f89f6
TM		 1023 if (delegation == NULL)
1024 return 0;
dc0b027d 1025 if ((delegation->type & fmode) != fmode)
aac00a8d 1026 return 0;
15c831bf 1027 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1028 return 0;
d25be546
TM		 1029 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1030 return 0;
b7391f44 1031 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1032 return 1;
1033}
1034
dc0b027d 1035static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1036{
dc0b027d 1037 switch (fmode) {
e7616923
TM		 1038 case FMODE_WRITE:
1039 state->n_wronly++;
1040 break;
1041 case FMODE_READ:
1042 state->n_rdonly++;
1043 break;
1044 case FMODE_READ|FMODE_WRITE:
1045 state->n_rdwr++;
1046 }
dc0b027d 1047 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1048}
1049
dc0b027d 1050static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1051{
1052 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1053 nfs4_stateid_copy(&state->stateid, stateid);
1054 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1055 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1056 switch (fmode) {
003707c7
TM		 1057 case FMODE_READ:
1058 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1059 break;
1060 case FMODE_WRITE:
1061 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1062 break;
1063 case FMODE_READ|FMODE_WRITE:
1064 set_bit(NFS_O_RDWR_STATE, &state->flags);
1065 }
e7616923
TM		 1066}
1067
dc0b027d 1068static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1069{
8bda4e4c 1070 write_seqlock(&state->seqlock);
dc0b027d 1071 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1072 write_sequnlock(&state->seqlock);
003707c7
TM		 1073}
1074
dc0b027d 1075static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1076{
8bda4e4c
TM		 1077 /*
1078 * Protect the call to nfs4_state_set_mode_locked and
1079 * serialise the stateid update
1080 */
1081 write_seqlock(&state->seqlock);
003707c7 1082 if (deleg_stateid != NULL) {
f597c537 1083 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1084 set_bit(NFS_DELEGATED_STATE, &state->flags);
1085 }
1086 if (open_stateid != NULL)
dc0b027d 1087 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1088 write_sequnlock(&state->seqlock);
1089 spin_lock(&state->owner->so_lock);
dc0b027d 1090 update_open_stateflags(state, fmode);
ec073428 1091 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1092}
1093
dc0b027d 1094static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1095{
1096 struct nfs_inode *nfsi = NFS_I(state->inode);
1097 struct nfs_delegation *deleg_cur;
1098 int ret = 0;
1099
dc0b027d 1100 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1101
1102 rcu_read_lock();
1103 deleg_cur = rcu_dereference(nfsi->delegation);
1104 if (deleg_cur == NULL)
1105 goto no_delegation;
1106
1107 spin_lock(&deleg_cur->lock);
17f26b12 1108 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1109 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1110 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1111 goto no_delegation_unlock;
1112
1113 if (delegation == NULL)
1114 delegation = &deleg_cur->stateid;
f597c537 1115 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1116 goto no_delegation_unlock;
1117
b7391f44 1118 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1119 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1120 ret = 1;
1121no_delegation_unlock:
1122 spin_unlock(&deleg_cur->lock);
1123no_delegation:
1124 rcu_read_unlock();
1125
1126 if (!ret && open_stateid != NULL) {
dc0b027d 1127 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1128 ret = 1;
1129 }
1130
1131 return ret;
1132}
1133
1134
dc0b027d 1135static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1136{
1137 struct nfs_delegation *delegation;
1138
1139 rcu_read_lock();
1140 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1141 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1142 rcu_read_unlock();
1143 return;
1144 }
1145 rcu_read_unlock();
57ec14c5 1146 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1147}
1148
6ee41268 1149static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1150{
1151 struct nfs4_state *state = opendata->state;
1152 struct nfs_inode *nfsi = NFS_I(state->inode);
1153 struct nfs_delegation *delegation;
f448badd 1154 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1155 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1156 nfs4_stateid stateid;
1157 int ret = -EAGAIN;
1158
aac00a8d 1159 for (;;) {
dc0b027d 1160 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1161 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1162 if (can_open_cached(state, fmode, open_mode)) {
1163 update_open_stateflags(state, fmode);
6ee41268 1164 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1165 goto out_return_state;
1166 }
1167 spin_unlock(&state->owner->so_lock);
1168 }
34310430
TM		 1169 rcu_read_lock();
1170 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1171 if (!can_open_delegated(delegation, fmode)) {
34310430 1172 rcu_read_unlock();
aac00a8d 1173 break;
34310430 1174 }
aac00a8d 1175 /* Save the delegation */
f597c537 1176 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1177 rcu_read_unlock();
fa332941 1178 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1179 if (!opendata->is_recover) {
1180 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1181 if (ret != 0)
1182 goto out;
1183 }
aac00a8d 1184 ret = -EAGAIN;
34310430
TM		 1185
1186 /* Try to update the stateid using the delegation */
dc0b027d 1187 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1188 goto out_return_state;
aac00a8d 1189 }
aac00a8d
TM		 1190out:
1191 return ERR_PTR(ret);
1192out_return_state:
1193 atomic_inc(&state->count);
1194 return state;
1195}
1196
e23008ec
AA		 1197static void
1198nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1199{
1200 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1201 struct nfs_delegation *delegation;
1202 int delegation_flags = 0;
1203
1204 rcu_read_lock();
1205 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1206 if (delegation)
1207 delegation_flags = delegation->flags;
1208 rcu_read_unlock();
1209 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1210 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1211 "returning a delegation for "
1212 "OPEN(CLAIM_DELEGATE_CUR)\n",
1213 clp->cl_hostname);
1214 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1215 nfs_inode_set_delegation(state->inode,
1216 data->owner->so_cred,
1217 &data->o_res);
1218 else
1219 nfs_inode_reclaim_delegation(state->inode,
1220 data->owner->so_cred,
1221 &data->o_res);
1222}
1223
1224/*
1225 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1226 * and update the nfs4_state.
1227 */
1228static struct nfs4_state *
1229_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1230{
1231 struct inode *inode = data->state->inode;
1232 struct nfs4_state *state = data->state;
1233 int ret;
1234
1235 if (!data->rpc_done) {
1236 ret = data->rpc_status;
1237 goto err;
1238 }
1239
1240 ret = -ESTALE;
1241 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1242 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1243 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1244 goto err;
1245
1246 ret = -ENOMEM;
1247 state = nfs4_get_open_state(inode, data->owner);
1248 if (state == NULL)
1249 goto err;
1250
1251 ret = nfs_refresh_inode(inode, &data->f_attr);
1252 if (ret)
1253 goto err;
1254
aa9c2669
DQ		 1255 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1256
e23008ec
AA		 1257 if (data->o_res.delegation_type != 0)
1258 nfs4_opendata_check_deleg(data, state);
1259 update_open_stateid(state, &data->o_res.stateid, NULL,
1260 data->o_arg.fmode);
1261
1262 return state;
1263err:
1264 return ERR_PTR(ret);
1265
1266}
1267
1268static struct nfs4_state *
1269_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1270{
1271 struct inode *inode;
1272 struct nfs4_state *state = NULL;
1b370bc2 1273 int ret;
24ac23ab 1274
aac00a8d 1275 if (!data->rpc_done) {
6ee41268 1276 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1277 goto out;
1278 }
1279
1b370bc2 1280 ret = -EAGAIN;
24ac23ab 1281 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1282 goto err;
1775fd3e 1283 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1284 ret = PTR_ERR(inode);
03f28e3a 1285 if (IS_ERR(inode))
1b370bc2
TM		 1286 goto err;
1287 ret = -ENOMEM;
24ac23ab
TM		 1288 state = nfs4_get_open_state(inode, data->owner);
1289 if (state == NULL)
1b370bc2 1290 goto err_put_inode;
e23008ec
AA		 1291 if (data->o_res.delegation_type != 0)
1292 nfs4_opendata_check_deleg(data, state);
34310430 1293 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1294 data->o_arg.fmode);
24ac23ab 1295 iput(inode);
aac00a8d 1296out:
7aa262b5 1297 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1298 return state;
1b370bc2
TM		 1299err_put_inode:
1300 iput(inode);
1301err:
1302 return ERR_PTR(ret);
24ac23ab
TM		 1303}
1304
e23008ec
AA		 1305static struct nfs4_state *
1306nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1307{
1308 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1309 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1310 return _nfs4_opendata_to_nfs4_state(data);
1311}
1312
864472e9
TM		 1313static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1314{
1315 struct nfs_inode *nfsi = NFS_I(state->inode);
1316 struct nfs_open_context *ctx;
1317
1318 spin_lock(&state->inode->i_lock);
1319 list_for_each_entry(ctx, &nfsi->open_files, list) {
1320 if (ctx->state != state)
1321 continue;
1322 get_nfs_open_context(ctx);
1323 spin_unlock(&state->inode->i_lock);
1324 return ctx;
1325 }
1326 spin_unlock(&state->inode->i_lock);
1327 return ERR_PTR(-ENOENT);
1328}
1329
4a1c0893
TM		 1330static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1331 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1332{
1333 struct nfs4_opendata *opendata;
1334
4a1c0893 1335 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1336 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1337 if (opendata == NULL)
1338 return ERR_PTR(-ENOMEM);
1339 opendata->state = state;
1340 atomic_inc(&state->count);
1341 return opendata;
1342}
1343
dc0b027d 1344static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1345{
2ced46c2 1346 struct nfs4_state *newstate;
864472e9
TM		 1347 int ret;
1348
dc0b027d
TM		 1349 opendata->o_arg.open_flags = 0;
1350 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1351 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1352 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1353 nfs4_init_opendata_res(opendata);
b257957e 1354 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1355 if (ret != 0)
1356 return ret;
2ced46c2 1357 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1358 if (IS_ERR(newstate))
1359 return PTR_ERR(newstate);
643168c2 1360 nfs4_close_state(newstate, fmode);
2ced46c2 1361 *res = newstate;
864472e9
TM		 1362 return 0;
1363}
1364
1365static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1366{
864472e9 1367 struct nfs4_state *newstate;
864472e9
TM		 1368 int ret;
1369
1370 /* memory barrier prior to reading state->n_* */
2ced46c2 1371 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1372 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1373 smp_rmb();
1374 if (state->n_rdwr != 0) {
b0ed9dbc 1375 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1376 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1377 if (ret != 0)
1378 return ret;
2ced46c2
TM		 1379 if (newstate != state)
1380 return -ESTALE;
864472e9
TM		 1381 }
1382 if (state->n_wronly != 0) {
b0ed9dbc 1383 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1384 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1385 if (ret != 0)
1386 return ret;
2ced46c2
TM		 1387 if (newstate != state)
1388 return -ESTALE;
864472e9
TM		 1389 }
1390 if (state->n_rdonly != 0) {
b0ed9dbc 1391 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1392 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1393 if (ret != 0)
1394 return ret;
2ced46c2
TM		 1395 if (newstate != state)
1396 return -ESTALE;
864472e9 1397 }
1ac7e2fd
TM		 1398 /*
1399 * We may have performed cached opens for all three recoveries.
1400 * Check if we need to update the current stateid.
1401 */
1402 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1403 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1404 write_seqlock(&state->seqlock);
1ac7e2fd 1405 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1406 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1407 write_sequnlock(&state->seqlock);
1ac7e2fd 1408 }
864472e9
TM		 1409 return 0;
1410}
1411
1da177e4
LT		 1412/*
1413 * OPEN_RECLAIM:
1414 * reclaim state on the server after a reboot.
1da177e4 1415 */
539cd03a 1416static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1417{
1ac7e2fd 1418 struct nfs_delegation *delegation;
864472e9 1419 struct nfs4_opendata *opendata;
dc0b027d 1420 fmode_t delegation_type = 0;
1da177e4
LT		 1421 int status;
1422
4a1c0893
TM		 1423 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1424 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1425 if (IS_ERR(opendata))
1426 return PTR_ERR(opendata);
1ac7e2fd
TM		 1427 rcu_read_lock();
1428 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1429 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1430 delegation_type = delegation->type;
1ac7e2fd 1431 rcu_read_unlock();
864472e9
TM		 1432 opendata->o_arg.u.delegation_type = delegation_type;
1433 status = nfs4_open_recover(opendata, state);
c6d00e63 1434 nfs4_opendata_put(opendata);
1da177e4
LT		 1435 return status;
1436}
1437
539cd03a 1438static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1439{
1440 struct nfs_server *server = NFS_SERVER(state->inode);
1441 struct nfs4_exception exception = { };
1442 int err;
1443 do {
539cd03a 1444 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1445 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1446 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1447 continue;
168667c4 1448 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1449 break;
1450 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1451 } while (exception.retry);
1452 return err;
1453}
1454
864472e9
TM		 1455static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1456{
1457 struct nfs_open_context *ctx;
1458 int ret;
1459
1460 ctx = nfs4_state_find_open_context(state);
1461 if (IS_ERR(ctx))
91876b13 1462 return -EAGAIN;
539cd03a 1463 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1464 put_nfs_open_context(ctx);
1465 return ret;
1466}
1467
db4f2e63 1468static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1469{
be76b5b6
TM		 1470 switch (err) {
1471 default:
1472 printk(KERN_ERR "NFS: %s: unhandled error "
1473 "%d.\n", __func__, err);
1474 case 0:
1475 case -ENOENT:
1476 case -ESTALE:
1477 break;
1478 case -NFS4ERR_BADSESSION:
1479 case -NFS4ERR_BADSLOT:
1480 case -NFS4ERR_BAD_HIGH_SLOT:
1481 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1482 case -NFS4ERR_DEADSESSION:
1483 set_bit(NFS_DELEGATED_STATE, &state->flags);
1484 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1485 return -EAGAIN;
1486 case -NFS4ERR_STALE_CLIENTID:
1487 case -NFS4ERR_STALE_STATEID:
1488 set_bit(NFS_DELEGATED_STATE, &state->flags);
1489 case -NFS4ERR_EXPIRED:
1490 /* Don't recall a delegation if it was lost */
1491 nfs4_schedule_lease_recovery(server->nfs_client);
1492 return -EAGAIN;
1493 case -NFS4ERR_DELEG_REVOKED:
1494 case -NFS4ERR_ADMIN_REVOKED:
1495 case -NFS4ERR_BAD_STATEID:
db4f2e63 1496 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1497 nfs_inode_find_state_and_recover(state->inode,
1498 stateid);
1499 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1500 return 0;
1501 case -NFS4ERR_DELAY:
1502 case -NFS4ERR_GRACE:
1503 set_bit(NFS_DELEGATED_STATE, &state->flags);
1504 ssleep(1);
1505 return -EAGAIN;
db4f2e63
TM		 1506 case -ENOMEM:
1507 case -NFS4ERR_DENIED:
1508 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1509 return 0;
be76b5b6 1510 }
1da177e4
LT		 1511 return err;
1512}
1513
db4f2e63
TM		 1514int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1515{
1516 struct nfs_server *server = NFS_SERVER(state->inode);
1517 struct nfs4_opendata *opendata;
1518 int err;
1519
1520 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1521 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1522 if (IS_ERR(opendata))
1523 return PTR_ERR(opendata);
1524 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1525 err = nfs4_open_recover(opendata, state);
1526 nfs4_opendata_put(opendata);
1527 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1528}
1529
cdd4e68b
TM		 1530static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1531{
1532 struct nfs4_opendata *data = calldata;
1533
1534 data->rpc_status = task->tk_status;
26e976a8 1535 if (data->rpc_status == 0) {
f597c537 1536 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1537 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1538 renew_lease(data->o_res.server, data->timestamp);
3e309914 1539 data->rpc_done = 1;
26e976a8 1540 }
cdd4e68b
TM		 1541}
1542
1543static void nfs4_open_confirm_release(void *calldata)
1544{
1545 struct nfs4_opendata *data = calldata;
1546 struct nfs4_state *state = NULL;
1547
1548 /* If this request hasn't been cancelled, do nothing */
1549 if (data->cancelled == 0)
1550 goto out_free;
1551 /* In case of error, no cleanup! */
3e309914 1552 if (!data->rpc_done)
cdd4e68b 1553 goto out_free;
cdd4e68b 1554 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1555 if (!IS_ERR(state))
643168c2 1556 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1557out_free:
c6d00e63 1558 nfs4_opendata_put(data);
cdd4e68b
TM		 1559}
1560
1561static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1562 .rpc_call_done = nfs4_open_confirm_done,
1563 .rpc_release = nfs4_open_confirm_release,
1564};
1565
1566/*
1567 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1568 */
1569static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1570{
1571 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1572 struct rpc_task *task;
5138fde0
TM		 1573 struct rpc_message msg = {
1574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1575 .rpc_argp = &data->c_arg,
1576 .rpc_resp = &data->c_res,
1577 .rpc_cred = data->owner->so_cred,
1578 };
c970aa85
TM		 1579 struct rpc_task_setup task_setup_data = {
1580 .rpc_client = server->client,
5138fde0 1581 .rpc_message = &msg,
c970aa85
TM		 1582 .callback_ops = &nfs4_open_confirm_ops,
1583 .callback_data = data,
101070ca 1584 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1585 .flags = RPC_TASK_ASYNC,
1586 };
1da177e4
LT		 1587 int status;
1588
c6d00e63 1589 kref_get(&data->kref);
3e309914
TM		 1590 data->rpc_done = 0;
1591 data->rpc_status = 0;
5138fde0 1592 data->timestamp = jiffies;
c970aa85 1593 task = rpc_run_task(&task_setup_data);
7a1218a2 1594 if (IS_ERR(task))
cdd4e68b 1595 return PTR_ERR(task);
cdd4e68b
TM		 1596 status = nfs4_wait_for_completion_rpc_task(task);
1597 if (status != 0) {
1598 data->cancelled = 1;
1599 smp_wmb();
1600 } else
1601 status = data->rpc_status;
e6b3c4db 1602 rpc_put_task(task);
1da177e4
LT		 1603 return status;
1604}
1605
24ac23ab 1606static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1607{
24ac23ab
TM		 1608 struct nfs4_opendata *data = calldata;
1609 struct nfs4_state_owner *sp = data->owner;
549b19cc 1610 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1611
24ac23ab 1612 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1613 goto out_wait;
aac00a8d
TM		 1614 /*
1615 * Check if we still need to send an OPEN call, or if we can use
1616 * a delegation instead.
1617 */
1618 if (data->state != NULL) {
1619 struct nfs_delegation *delegation;
1620
dc0b027d 1621 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1622 goto out_no_action;
aac00a8d
TM		 1623 rcu_read_lock();
1624 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1625 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1626 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1627 can_open_delegated(delegation, data->o_arg.fmode))
1628 goto unlock_no_action;
aac00a8d
TM		 1629 rcu_read_unlock();
1630 }
95b72eb0 1631 /* Update client id. */
549b19cc 1632 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1633 switch (data->o_arg.claim) {
1634 case NFS4_OPEN_CLAIM_PREVIOUS:
1635 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1636 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1637 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1638 case NFS4_OPEN_CLAIM_FH:
1639 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1640 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1641 }
26e976a8 1642 data->timestamp = jiffies;
035168ab 1643 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1644 &data->o_arg.seq_args,
2240a9e2
TM		 1645 &data->o_res.seq_res,
1646 task) != 0)
1647 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1648
1649 /* Set the create mode (note dependency on the session type) */
1650 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1651 if (data->o_arg.open_flags & O_EXCL) {
1652 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1653 if (nfs4_has_persistent_session(clp))
1654 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1655 else if (clp->cl_mvops->minor_version > 0)
1656 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1657 }
6ee41268 1658 return;
652f89f6
TM		 1659unlock_no_action:
1660 rcu_read_unlock();
6ee41268
TM		 1661out_no_action:
1662 task->tk_action = NULL;
c8da19b9 1663out_wait:
b75ad4cd 1664 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1665}
1666
24ac23ab
TM		 1667static void nfs4_open_done(struct rpc_task *task, void *calldata)
1668{
1669 struct nfs4_opendata *data = calldata;
1da177e4 1670
24ac23ab 1671 data->rpc_status = task->tk_status;
d898528c 1672
14516c3a
TM		 1673 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1674 return;
d898528c 1675
24ac23ab 1676 if (task->tk_status == 0) {
807d66d8
TM		 1677 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1678 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1679 case S_IFREG:
1680 break;
1681 case S_IFLNK:
24ac23ab 1682 data->rpc_status = -ELOOP;
6f926b5b
TM		 1683 break;
1684 case S_IFDIR:
24ac23ab 1685 data->rpc_status = -EISDIR;
6f926b5b
TM		 1686 break;
1687 default:
24ac23ab 1688 data->rpc_status = -ENOTDIR;
807d66d8 1689 }
6f926b5b 1690 }
26e976a8 1691 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1692 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1693 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1694 }
3e309914 1695 data->rpc_done = 1;
24ac23ab 1696}
6f926b5b 1697
24ac23ab
TM		 1698static void nfs4_open_release(void *calldata)
1699{
1700 struct nfs4_opendata *data = calldata;
1701 struct nfs4_state *state = NULL;
1702
1703 /* If this request hasn't been cancelled, do nothing */
1704 if (data->cancelled == 0)
1705 goto out_free;
1706 /* In case of error, no cleanup! */
3e309914 1707 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1708 goto out_free;
1709 /* In case we need an open_confirm, no cleanup! */
1710 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1711 goto out_free;
24ac23ab 1712 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1713 if (!IS_ERR(state))
643168c2 1714 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1715out_free:
c6d00e63 1716 nfs4_opendata_put(data);
24ac23ab
TM		 1717}
1718
1719static const struct rpc_call_ops nfs4_open_ops = {
1720 .rpc_call_prepare = nfs4_open_prepare,
1721 .rpc_call_done = nfs4_open_done,
1722 .rpc_release = nfs4_open_release,
1723};
1724
b257957e 1725static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1726{
1727 struct inode *dir = data->dir->d_inode;
1728 struct nfs_server *server = NFS_SERVER(dir);
1729 struct nfs_openargs *o_arg = &data->o_arg;
1730 struct nfs_openres *o_res = &data->o_res;
1731 struct rpc_task *task;
5138fde0
TM		 1732 struct rpc_message msg = {
1733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1734 .rpc_argp = o_arg,
1735 .rpc_resp = o_res,
1736 .rpc_cred = data->owner->so_cred,
1737 };
c970aa85
TM		 1738 struct rpc_task_setup task_setup_data = {
1739 .rpc_client = server->client,
5138fde0 1740 .rpc_message = &msg,
c970aa85
TM		 1741 .callback_ops = &nfs4_open_ops,
1742 .callback_data = data,
101070ca 1743 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1744 .flags = RPC_TASK_ASYNC,
1745 };
24ac23ab
TM		 1746 int status;
1747
9d12b216 1748 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1749 kref_get(&data->kref);
3e309914
TM		 1750 data->rpc_done = 0;
1751 data->rpc_status = 0;
2ced46c2 1752 data->cancelled = 0;
bdeca1b7
TM		 1753 data->is_recover = 0;
1754 if (isrecover) {
8fe72bac 1755 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1756 data->is_recover = 1;
1757 }
c970aa85 1758 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1759 if (IS_ERR(task))
1760 return PTR_ERR(task);
1761 status = nfs4_wait_for_completion_rpc_task(task);
1762 if (status != 0) {
1763 data->cancelled = 1;
1764 smp_wmb();
1765 } else
1766 status = data->rpc_status;
1767 rpc_put_task(task);
1768
1769 return status;
1770}
1771
1772static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1773{
1774 struct inode *dir = data->dir->d_inode;
1775 struct nfs_openres *o_res = &data->o_res;
1776 int status;
1777
1778 status = nfs4_run_open_task(data, 1);
1779 if (status != 0 || !data->rpc_done)
1780 return status;
1781
6926afd1
TM		 1782 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1783
b257957e
AB		 1784 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1785 status = _nfs4_proc_open_confirm(data);
1786 if (status != 0)
1787 return status;
1788 }
1789
1790 return status;
1791}
1792
6168f62c
WAA		 1793static int nfs4_opendata_access(struct rpc_cred *cred,
1794 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1795 struct nfs4_state *state, fmode_t fmode,
1796 int openflags)
6168f62c
WAA		 1797{
1798 struct nfs_access_entry cache;
1799 u32 mask;
1800
1801 /* access call failed or for some reason the server doesn't
1802 * support any access modes -- defer access call until later */
1803 if (opendata->o_res.access_supported == 0)
1804 return 0;
1805
1806 mask = 0;
bbd3a8ee 1807 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1808 * write mode bits, but POSIX allows the creating process to write.
1809 * use openflags to check for exec, because fmode won't
1810 * always have FMODE_EXEC set when file open for exec. */
1811 if (openflags & __FMODE_EXEC) {
1812 /* ONLY check for exec rights */
1813 mask = MAY_EXEC;
1814 } else if (fmode & FMODE_READ)
1815 mask = MAY_READ;
6168f62c
WAA		 1816
1817 cache.cred = cred;
1818 cache.jiffies = jiffies;
1819 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1820 nfs_access_add_cache(state->inode, &cache);
1821
bbd3a8ee 1822 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1823 return 0;
1824
1825 /* even though OPEN succeeded, access is denied. Close the file */
1826 nfs4_close_state(state, fmode);
998f40b5 1827 return -EACCES;
6168f62c
WAA		 1828}
1829
b257957e
AB		 1830/*
1831 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1832 */
1833static int _nfs4_proc_open(struct nfs4_opendata *data)
1834{
1835 struct inode *dir = data->dir->d_inode;
1836 struct nfs_server *server = NFS_SERVER(dir);
1837 struct nfs_openargs *o_arg = &data->o_arg;
1838 struct nfs_openres *o_res = &data->o_res;
1839 int status;
1840
1841 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1842 if (!data->rpc_done)
1843 return status;
1844 if (status != 0) {
1845 if (status == -NFS4ERR_BADNAME &&
1846 !(o_arg->open_flags & O_CREAT))
1847 return -ENOENT;
24ac23ab 1848 return status;
08ef7bd3 1849 }
24ac23ab 1850
6926afd1
TM		 1851 nfs_fattr_map_and_free_names(server, &data->f_attr);
1852
90ff0c54 1853 if (o_arg->open_flags & O_CREAT)
56ae19f3 1854 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1855 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1856 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1857 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1858 status = _nfs4_proc_open_confirm(data);
1da177e4 1859 if (status != 0)
24ac23ab 1860 return status;
1da177e4
LT		 1861 }
1862 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1863 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1864 return 0;
1da177e4
LT		 1865}
1866
d83217c1
AA		 1867static int nfs4_recover_expired_lease(struct nfs_server *server)
1868{
1869 return nfs4_client_recover_expired_lease(server->nfs_client);
1870}
1871
1da177e4
LT		 1872/*
1873 * OPEN_EXPIRED:
1874 * reclaim state on the server after a network partition.
1875 * Assumes caller holds the appropriate lock
1876 */
539cd03a 1877static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1878{
e56e0b78 1879 struct nfs4_opendata *opendata;
864472e9 1880 int ret;
1da177e4 1881
4a1c0893 1882 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1883 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1884 if (IS_ERR(opendata))
1885 return PTR_ERR(opendata);
864472e9 1886 ret = nfs4_open_recover(opendata, state);
35d05778 1887 if (ret == -ESTALE)
3d4ff43d 1888 d_drop(ctx->dentry);
c6d00e63 1889 nfs4_opendata_put(opendata);
864472e9 1890 return ret;
1da177e4
LT		 1891}
1892
a9ed2e25 1893static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1894{
539cd03a 1895 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1896 struct nfs4_exception exception = { };
1897 int err;
1898
1899 do {
539cd03a 1900 err = _nfs4_open_expired(ctx, state);
42113a75 1901 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1902 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1903 continue;
a9ed2e25
TM		 1904 switch (err) {
1905 default:
1906 goto out;
1907 case -NFS4ERR_GRACE:
1908 case -NFS4ERR_DELAY:
1909 nfs4_handle_exception(server, err, &exception);
1910 err = 0;
1911 }
202b50dc 1912 } while (exception.retry);
a9ed2e25 1913out:
202b50dc
TM		 1914 return err;
1915}
1916
1da177e4
LT		 1917static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1918{
1da177e4 1919 struct nfs_open_context *ctx;
864472e9 1920 int ret;
1da177e4 1921
864472e9
TM		 1922 ctx = nfs4_state_find_open_context(state);
1923 if (IS_ERR(ctx))
91876b13 1924 return -EAGAIN;
539cd03a 1925 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1926 put_nfs_open_context(ctx);
1927 return ret;
1da177e4
LT		 1928}
1929
f062eb6c 1930#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1931static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1932{
f062eb6c 1933 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1934 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1935 struct nfs_delegation *delegation;
1936 struct rpc_cred *cred = NULL;
1937 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1938
1939 /* If a state reset has been done, test_stateid is unneeded */
1940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1941 return;
1942
ab7cb0df
TM		 1943 /* Get the delegation credential for use by test/free_stateid */
1944 rcu_read_lock();
1945 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1946 if (delegation != NULL &&
1947 nfs4_stateid_match(&delegation->stateid, stateid)) {
1948 cred = get_rpccred(delegation->cred);
1949 rcu_read_unlock();
1950 status = nfs41_test_stateid(server, stateid, cred);
1951 } else
1952 rcu_read_unlock();
1953
3e60ffdd
CL		 1954 if (status != NFS_OK) {
1955 /* Free the stateid unless the server explicitly
1956 * informs us the stateid is unrecognized. */
1957 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1958 nfs41_free_stateid(server, stateid, cred);
6938867e 1959 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1960
6938867e
BS		 1961 write_seqlock(&state->seqlock);
1962 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1963 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1964 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1965 }
ab7cb0df
TM		 1966
1967 if (cred != NULL)
1968 put_rpccred(cred);
3e60ffdd
CL		 1969}
1970
1971/**
1972 * nfs41_check_open_stateid - possibly free an open stateid
1973 *
1974 * @state: NFSv4 state for an inode
1975 *
1976 * Returns NFS_OK if recovery for this stateid is now finished.
1977 * Otherwise a negative NFS4ERR value is returned.
1978 */
1979static int nfs41_check_open_stateid(struct nfs4_state *state)
1980{
1981 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1982 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1983 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1984 int status;
1985
1986 /* If a state reset has been done, test_stateid is unneeded */
1987 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1988 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1989 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1990 return -NFS4ERR_BAD_STATEID;
1991
ab7cb0df 1992 status = nfs41_test_stateid(server, stateid, cred);
3e60ffdd
CL		 1993 if (status != NFS_OK) {
1994 /* Free the stateid unless the server explicitly
1995 * informs us the stateid is unrecognized. */
1996 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1997 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 1998
1999 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2000 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2001 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2002 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2003 }
2004 return status;
2005}
2006
2007static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2008{
eb64cf96 2009 int status;
b01dd1d8 2010
3e60ffdd
CL		 2011 nfs41_clear_delegation_stateid(state);
2012 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2013 if (status != NFS_OK)
2014 status = nfs4_open_expired(sp, state);
2015 return status;
f062eb6c
BS		 2016}
2017#endif
2018
aa53ed54
JL		 2019/*
2020 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2021 * fields corresponding to attributes that were used to store the verifier.
2022 * Make sure we clobber those fields in the later setattr call
2023 */
2024static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2025{
2026 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2027 !(sattr->ia_valid & ATTR_ATIME_SET))
2028 sattr->ia_valid |= ATTR_ATIME;
2029
2030 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2031 !(sattr->ia_valid & ATTR_MTIME_SET))
2032 sattr->ia_valid |= ATTR_MTIME;
2033}
2034
c21443c2
TM		 2035static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2036 fmode_t fmode,
2037 int flags,
3efb9722 2038 struct nfs_open_context *ctx)
c21443c2
TM		 2039{
2040 struct nfs4_state_owner *sp = opendata->owner;
2041 struct nfs_server *server = sp->so_server;
275bb307 2042 struct dentry *dentry;
c21443c2
TM		 2043 struct nfs4_state *state;
2044 unsigned int seq;
2045 int ret;
2046
2047 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2048
2049 ret = _nfs4_proc_open(opendata);
2050 if (ret != 0)
2051 goto out;
2052
2053 state = nfs4_opendata_to_nfs4_state(opendata);
2054 ret = PTR_ERR(state);
2055 if (IS_ERR(state))
2056 goto out;
2057 if (server->caps & NFS_CAP_POSIX_LOCK)
2058 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2059
275bb307
TM		 2060 dentry = opendata->dentry;
2061 if (dentry->d_inode == NULL) {
2062 /* FIXME: Is this d_drop() ever needed? */
2063 d_drop(dentry);
2064 dentry = d_add_unique(dentry, igrab(state->inode));
2065 if (dentry == NULL) {
2066 dentry = opendata->dentry;
2067 } else if (dentry != ctx->dentry) {
2068 dput(ctx->dentry);
2069 ctx->dentry = dget(dentry);
2070 }
2071 nfs_set_verifier(dentry,
2072 nfs_save_change_attribute(opendata->dir->d_inode));
2073 }
2074
c21443c2
TM		 2075 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2076 if (ret != 0)
2077 goto out;
2078
3efb9722 2079 ctx->state = state;
c45ffdd2
TM		 2080 if (dentry->d_inode == state->inode) {
2081 nfs_inode_attach_open_context(ctx);
2082 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2083 nfs4_schedule_stateid_recovery(server, state);
2084 }
c21443c2
TM		 2085out:
2086 return ret;
2087}
2088
1da177e4 2089/*
24ac23ab 2090 * Returns a referenced nfs4_state
1da177e4 2091 */
82be417a 2092static int _nfs4_do_open(struct inode *dir,
4197a055 2093 struct nfs_open_context *ctx,
82be417a
AA		 2094 int flags,
2095 struct iattr *sattr,
959d921f 2096 struct nfs4_label *label)
1da177e4
LT		 2097{
2098 struct nfs4_state_owner *sp;
2099 struct nfs4_state *state = NULL;
2100 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2101 struct nfs4_opendata *opendata;
4197a055
TM		 2102 struct dentry *dentry = ctx->dentry;
2103 struct rpc_cred *cred = ctx->cred;
2104 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2105 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2106 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2107 struct nfs4_label *olabel = NULL;
aac00a8d 2108 int status;
1da177e4
LT		 2109
2110 /* Protect against reboot recovery conflicts */
1da177e4 2111 status = -ENOMEM;
d1e284d5
TM		 2112 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2113 if (sp == NULL) {
1da177e4
LT		 2114 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2115 goto out_err;
2116 }
58d9714a
TM		 2117 status = nfs4_recover_expired_lease(server);
2118 if (status != 0)
b4454fe1 2119 goto err_put_state_owner;
82a2c1b7
AV		 2120 if (dentry->d_inode != NULL)
2121 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2122 status = -ENOMEM;
49f9a0fa
TM		 2123 if (dentry->d_inode)
2124 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2125 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2126 label, claim, GFP_KERNEL);
e56e0b78 2127 if (opendata == NULL)
95d35cb4 2128 goto err_put_state_owner;
1da177e4 2129
14c43f76
DQ		 2130 if (label) {
2131 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2132 if (IS_ERR(olabel)) {
2133 status = PTR_ERR(olabel);
2134 goto err_opendata_put;
2135 }
2136 }
2137
82be417a
AA		 2138 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2139 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2140 if (!opendata->f_attr.mdsthreshold)
14c43f76 2141 goto err_free_label;
1549210f 2142 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2143 }
82a2c1b7
AV		 2144 if (dentry->d_inode != NULL)
2145 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2146
3efb9722 2147 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2148 if (status != 0)
14c43f76 2149 goto err_free_label;
3efb9722 2150 state = ctx->state;
6168f62c 2151
549b19cc
TM		 2152 if ((opendata->o_arg.open_flags & O_EXCL) &&
2153 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2154 nfs4_exclusive_attrset(opendata, sattr);
2155
2156 nfs_fattr_init(opendata->o_res.f_attr);
2157 status = nfs4_do_setattr(state->inode, cred,
2158 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2159 state, label, olabel);
2160 if (status == 0) {
0ab64e0e 2161 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2162 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2163 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2164 }
0ab64e0e 2165 }
82be417a
AA		 2166
2167 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2168 *ctx_th = opendata->f_attr.mdsthreshold;
2169 else
2170 kfree(opendata->f_attr.mdsthreshold);
2171 opendata->f_attr.mdsthreshold = NULL;
2172
14c43f76
DQ		 2173 nfs4_label_free(olabel);
2174
c6d00e63 2175 nfs4_opendata_put(opendata);
1da177e4 2176 nfs4_put_state_owner(sp);
1da177e4 2177 return 0;
14c43f76
DQ		 2178err_free_label:
2179 nfs4_label_free(olabel);
c6d00e63 2180err_opendata_put:
82be417a 2181 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2182 nfs4_opendata_put(opendata);
e56e0b78
TM		 2183err_put_state_owner:
2184 nfs4_put_state_owner(sp);
1da177e4 2185out_err:
1da177e4
LT		 2186 return status;
2187}
2188
2189
82be417a 2190static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2191 struct nfs_open_context *ctx,
82be417a
AA		 2192 int flags,
2193 struct iattr *sattr,
959d921f 2194 struct nfs4_label *label)
1da177e4 2195{
49f9a0fa 2196 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2197 struct nfs4_exception exception = { };
2198 struct nfs4_state *res;
2199 int status;
2200
2201 do {
959d921f 2202 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2203 res = ctx->state;
42113a75 2204 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2205 if (status == 0)
2206 break;
2207 /* NOTE: BAD_SEQID means the server and client disagree about the
2208 * book-keeping w.r.t. state-changing operations
2209 * (OPEN/CLOSE/LOCK/LOCKU...)
2210 * It is actually a sign of a bug on the client or on the server.
2211 *
2212 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2213 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2214 * have unhashed the old state_owner for us, and that we can
2215 * therefore safely retry using a new one. We should still warn
2216 * the user though...
2217 */
2218 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2219 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2220 " returned a bad sequence-id error!\n",
2221 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2222 exception.retry = 1;
2223 continue;
2224 }
550f5747
TM		 2225 /*
2226 * BAD_STATEID on OPEN means that the server cancelled our
2227 * state before it received the OPEN_CONFIRM.
2228 * Recover by retrying the request as per the discussion
2229 * on Page 181 of RFC3530.
2230 */
2231 if (status == -NFS4ERR_BAD_STATEID) {
2232 exception.retry = 1;
2233 continue;
2234 }
aac00a8d
TM		 2235 if (status == -EAGAIN) {
2236 /* We must have found a delegation */
2237 exception.retry = 1;
2238 continue;
2239 }
49f9a0fa
TM		 2240 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2241 continue;
2242 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2243 status, &exception));
2244 } while (exception.retry);
2245 return res;
2246}
2247
659bfcd6
TM		 2248static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2249 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2250 struct nfs4_state *state, struct nfs4_label *ilabel,
2251 struct nfs4_label *olabel)
1da177e4 2252{
3e4f6290 2253 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2254 struct nfs_setattrargs arg = {
3e4f6290 2255 .fh = NFS_FH(inode),
1da177e4
LT		 2256 .iap = sattr,
2257 .server = server,
2258 .bitmask = server->attr_bitmask,
1775fd3e 2259 .label = ilabel,
1da177e4
LT		 2260 };
2261 struct nfs_setattrres res = {
2262 .fattr = fattr,
1775fd3e 2263 .label = olabel,
1da177e4
LT		 2264 .server = server,
2265 };
2266 struct rpc_message msg = {
659bfcd6
TM		 2267 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2268 .rpc_argp = &arg,
2269 .rpc_resp = &res,
2270 .rpc_cred = cred,
1da177e4 2271 };
26e976a8 2272 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2273 fmode_t fmode;
2274 bool truncate;
65e4308d 2275 int status;
1da177e4 2276
aa9c2669
DQ		 2277 arg.bitmask = nfs4_bitmask(server, ilabel);
2278 if (ilabel)
2279 arg.bitmask = nfs4_bitmask(server, olabel);
2280
0e574af1 2281 nfs_fattr_init(fattr);
1da177e4 2282
ee3ae84e
TM		 2283 /* Servers should only apply open mode checks for file size changes */
2284 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2285 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2286
2287 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2288 /* Use that stateid */
2289 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2290 struct nfs_lockowner lockowner = {
2291 .l_owner = current->files,
2292 .l_pid = current->tgid,
2293 };
4fc8796d 2294 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2295 &lockowner);
08e9eac4 2296 } else
f597c537 2297 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2298
7c513058 2299 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2300 if (status == 0 && state != NULL)
2301 renew_lease(server, timestamp);
65e4308d 2302 return status;
1da177e4
LT		 2303}
2304
659bfcd6
TM		 2305static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2306 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2307 struct nfs4_state *state, struct nfs4_label *ilabel,
2308 struct nfs4_label *olabel)
1da177e4 2309{
3e4f6290 2310 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2311 struct nfs4_exception exception = {
2312 .state = state,
3114ea7a 2313 .inode = inode,
a1d0b5ee 2314 };
1da177e4
LT		 2315 int err;
2316 do {
1775fd3e 2317 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2318 trace_nfs4_setattr(inode, err);
451146be
TM		 2319 switch (err) {
2320 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2321 if (!(sattr->ia_valid & ATTR_SIZE)) {
2322 pr_warn_once("NFSv4: server %s is incorrectly "
2323 "applying open mode checks to "
2324 "a SETATTR that is not "
2325 "changing file size.\n",
2326 server->nfs_client->cl_hostname);
2327 }
451146be
TM		 2328 if (state && !(state->state & FMODE_WRITE)) {
2329 err = -EBADF;
2330 if (sattr->ia_valid & ATTR_OPEN)
2331 err = -EACCES;
2332 goto out;
2333 }
2334 }
2335 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2336 } while (exception.retry);
451146be 2337out:
1da177e4
LT		 2338 return err;
2339}
2340
2341struct nfs4_closedata {
2342 struct inode *inode;
2343 struct nfs4_state *state;
2344 struct nfs_closeargs arg;
2345 struct nfs_closeres res;
516a6af6 2346 struct nfs_fattr fattr;
26e976a8 2347 unsigned long timestamp;
f7e8917a
FI		 2348 bool roc;
2349 u32 roc_barrier;
1da177e4
LT		 2350};
2351
963d8fe5 2352static void nfs4_free_closedata(void *data)
9512135d 2353{
963d8fe5
TM		 2354 struct nfs4_closedata *calldata = data;
2355 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2356 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2357
f7e8917a
FI		 2358 if (calldata->roc)
2359 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2360 nfs4_put_open_state(calldata->state);
2361 nfs_free_seqid(calldata->arg.seqid);
9512135d 2362 nfs4_put_state_owner(sp);
322b2b90 2363 nfs_sb_deactive(sb);
9512135d
TM		 2364 kfree(calldata);
2365}
2366
88069f77
TM		 2367static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2368 fmode_t fmode)
2369{
2370 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2371 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2372 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2373 case FMODE_WRITE:
88069f77 2374 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2375 break;
2376 case FMODE_READ:
88069f77 2377 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2378 break;
2379 case 0:
2380 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2381 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2382 clear_bit(NFS_OPEN_STATE, &state->flags);
2383 }
88069f77
TM		 2384 spin_unlock(&state->owner->so_lock);
2385}
2386
963d8fe5 2387static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2388{
963d8fe5 2389 struct nfs4_closedata *calldata = data;
1da177e4 2390 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2391 struct nfs_server *server = NFS_SERVER(calldata->inode);
2392
a3ca5651 2393 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2394 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2395 return;
42113a75 2396 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2397 /* hmm. we are done with the inode, and in the process of freeing
2398 * the state_owner. we keep this around to process errors
2399 */
1da177e4
LT		 2400 switch (task->tk_status) {
2401 case 0:
f7e8917a
FI		 2402 if (calldata->roc)
2403 pnfs_roc_set_barrier(state->inode,
2404 calldata->roc_barrier);
45328c35 2405 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2406 renew_lease(server, calldata->timestamp);
88069f77
TM		 2407 nfs4_close_clear_stateid_flags(state,
2408 calldata->arg.fmode);
1da177e4
LT		 2409 break;
2410 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2411 case -NFS4ERR_OLD_STATEID:
2412 case -NFS4ERR_BAD_STATEID:
1da177e4 2413 case -NFS4ERR_EXPIRED:
dc0b027d 2414 if (calldata->arg.fmode == 0)
9e33bed5 2415 break;
1da177e4 2416 default:
72211dbe
TM		 2417 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2418 rpc_restart_call_prepare(task);
1da177e4 2419 }
72211dbe 2420 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2421 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2422 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2423}
2424
4ce70ada 2425static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2426{
4ce70ada 2427 struct nfs4_closedata *calldata = data;
9512135d 2428 struct nfs4_state *state = calldata->state;
7fdab069 2429 struct inode *inode = calldata->inode;
88069f77 2430 int call_close = 0;
9512135d 2431
a3ca5651 2432 dprintk("%s: begin!\n", __func__);
963d8fe5 2433 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2434 goto out_wait;
003707c7 2435
88069f77
TM		 2436 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2437 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2438 spin_lock(&state->owner->so_lock);
003707c7 2439 /* Calculate the change in open mode */
e7616923 2440 if (state->n_rdwr == 0) {
003707c7 2441 if (state->n_rdonly == 0) {
88069f77
TM		 2442 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2443 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2444 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2445 }
2446 if (state->n_wronly == 0) {
88069f77
TM		 2447 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2448 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2449 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2450 }
e7616923 2451 }
5d422301
TM		 2452 if (!nfs4_valid_open_stateid(state))
2453 call_close = 0;
4cecb76f 2454 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2455
2456 if (!call_close) {
963d8fe5 2457 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2458 goto out_no_action;
9512135d 2459 }
88069f77 2460
f7e8917a 2461 if (calldata->arg.fmode == 0) {
88069f77 2462 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2463 if (calldata->roc &&
b9536ad5
AA		 2464 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2465 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2466 goto out_wait;
b9536ad5 2467 }
f7e8917a 2468 }
88069f77 2469
516a6af6 2470 nfs_fattr_init(calldata->res.fattr);
26e976a8 2471 calldata->timestamp = jiffies;
7fdab069 2472 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2473 &calldata->arg.seq_args,
2474 &calldata->res.seq_res,
2240a9e2
TM		 2475 task) != 0)
2476 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2477 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2478 return;
2479out_no_action:
2480 task->tk_action = NULL;
2481out_wait:
2482 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2483}
2484
963d8fe5 2485static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2486 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2487 .rpc_call_done = nfs4_close_done,
2488 .rpc_release = nfs4_free_closedata,
2489};
2490
1da177e4
LT		 2491/*
2492 * It is possible for data to be read/written from a mem-mapped file
2493 * after the sys_close call (which hits the vfs layer as a flush).
2494 * This means that we can't safely call nfsv4 close on a file until
2495 * the inode is cleared. This in turn means that we are not good
2496 * NFSv4 citizens - we do not indicate to the server to update the file's
2497 * share state even when we are done with one of the three share
2498 * stateid's in the inode.
2499 *
2500 * NOTE: Caller must be holding the sp->so_owner semaphore!
2501 */
1f7977c1 2502int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2503{
4a35bd41 2504 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2505 struct nfs4_closedata *calldata;
b39e625b
TM		 2506 struct nfs4_state_owner *sp = state->owner;
2507 struct rpc_task *task;
5138fde0
TM		 2508 struct rpc_message msg = {
2509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2510 .rpc_cred = state->owner->so_cred,
2511 };
c970aa85
TM		 2512 struct rpc_task_setup task_setup_data = {
2513 .rpc_client = server->client,
5138fde0 2514 .rpc_message = &msg,
c970aa85 2515 .callback_ops = &nfs4_close_ops,
101070ca 2516 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2517 .flags = RPC_TASK_ASYNC,
2518 };
9512135d 2519 int status = -ENOMEM;
1da177e4 2520
8535b2be 2521 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2522 if (calldata == NULL)
9512135d 2523 goto out;
9d12b216 2524 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2525 calldata->inode = state->inode;
1da177e4 2526 calldata->state = state;
4a35bd41 2527 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2528 calldata->arg.stateid = &state->open_stateid;
1da177e4 2529 /* Serialization for the sequence id */
8535b2be 2530 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2531 if (calldata->arg.seqid == NULL)
2532 goto out_free_calldata;
dc0b027d 2533 calldata->arg.fmode = 0;
a65318bf 2534 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2535 calldata->res.fattr = &calldata->fattr;
c1d51931 2536 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2537 calldata->res.server = server;
1f7977c1 2538 calldata->roc = pnfs_roc(state->inode);
643168c2 2539 nfs_sb_active(calldata->inode->i_sb);
9512135d 2540
1174dd1f
TM		 2541 msg.rpc_argp = &calldata->arg;
2542 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2543 task_setup_data.callback_data = calldata;
2544 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2545 if (IS_ERR(task))
2546 return PTR_ERR(task);
a49c3c77
TM		 2547 status = 0;
2548 if (wait)
2549 status = rpc_wait_for_completion_task(task);
b39e625b 2550 rpc_put_task(task);
a49c3c77 2551 return status;
9512135d
TM		 2552out_free_calldata:
2553 kfree(calldata);
2554out:
b39e625b
TM		 2555 nfs4_put_open_state(state);
2556 nfs4_put_state_owner(sp);
9512135d 2557 return status;
1da177e4
LT		 2558}
2559
2b484297 2560static struct inode *
cd9a1c0e 2561nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2562{
1da177e4 2563 struct nfs4_state *state;
aa9c2669
DQ		 2564 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2565
2566 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2567
565277f6 2568 /* Protect against concurrent sillydeletes */
959d921f 2569 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2570
2571 nfs4_label_release_security(label);
2572
f46e0bd3
TM		 2573 if (IS_ERR(state))
2574 return ERR_CAST(state);
275bb307 2575 return state->inode;
1da177e4
LT		 2576}
2577
1185a552 2578static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2579{
2580 if (ctx->state == NULL)
2581 return;
2582 if (is_sync)
643168c2 2583 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2584 else
643168c2 2585 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2586}
1da177e4
LT		 2587
2588static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2589{
43652ad5
BH		 2590 struct nfs4_server_caps_arg args = {
2591 .fhandle = fhandle,
2592 };
1da177e4
LT		 2593 struct nfs4_server_caps_res res = {};
2594 struct rpc_message msg = {
2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2596 .rpc_argp = &args,
1da177e4
LT		 2597 .rpc_resp = &res,
2598 };
2599 int status;
2600
7c513058 2601 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2602 if (status == 0) {
2603 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2604 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2605 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2606 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2607 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2608 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2609 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2610 server->caps |= NFS_CAP_ACLS;
2611 if (res.has_links != 0)
2612 server->caps |= NFS_CAP_HARDLINKS;
2613 if (res.has_symlinks != 0)
2614 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2615 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2616 server->caps |= NFS_CAP_FILEID;
2617 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2618 server->caps |= NFS_CAP_MODE;
2619 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2620 server->caps |= NFS_CAP_NLINK;
2621 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2622 server->caps |= NFS_CAP_OWNER;
2623 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2624 server->caps |= NFS_CAP_OWNER_GROUP;
2625 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2626 server->caps |= NFS_CAP_ATIME;
2627 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2628 server->caps |= NFS_CAP_CTIME;
2629 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2630 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2631#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2632 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2633 server->caps |= NFS_CAP_SECURITY_LABEL;
2634#endif
2635 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2636 sizeof(server->attr_bitmask));
62ab460c 2637
aa9c2669
DQ		 2638 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2639 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2640 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2641 }
a65318bf
TM		 2642 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2643 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2644 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2645 server->acl_bitmask = res.acl_bitmask;
264e6351 2646 server->fh_expire_type = res.fh_expire_type;
1da177e4 2647 }
cccef3b9 2648
1da177e4
LT		 2649 return status;
2650}
2651
55a97593 2652int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2653{
2654 struct nfs4_exception exception = { };
2655 int err;
2656 do {
2657 err = nfs4_handle_exception(server,
2658 _nfs4_server_capabilities(server, fhandle),
2659 &exception);
2660 } while (exception.retry);
2661 return err;
2662}
2663
2664static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2665 struct nfs_fsinfo *info)
2666{
aa9c2669 2667 u32 bitmask[3];
1da177e4 2668 struct nfs4_lookup_root_arg args = {
aa9c2669 2669 .bitmask = bitmask,
1da177e4
LT		 2670 };
2671 struct nfs4_lookup_res res = {
2672 .server = server,
0e574af1 2673 .fattr = info->fattr,
1da177e4
LT		 2674 .fh = fhandle,
2675 };
2676 struct rpc_message msg = {
2677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2678 .rpc_argp = &args,
2679 .rpc_resp = &res,
2680 };
008f55d0 2681
aa9c2669
DQ		 2682 bitmask[0] = nfs4_fattr_bitmap[0];
2683 bitmask[1] = nfs4_fattr_bitmap[1];
2684 /*
2685 * Process the label in the upcoming getfattr
2686 */
2687 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2688
0e574af1 2689 nfs_fattr_init(info->fattr);
7c513058 2690 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2691}
2692
2693static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2694 struct nfs_fsinfo *info)
2695{
2696 struct nfs4_exception exception = { };
2697 int err;
2698 do {
fb8a5ba8 2699 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2700 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2701 switch (err) {
2702 case 0:
2703 case -NFS4ERR_WRONGSEC:
05e9cfb4 2704 goto out;
fb8a5ba8
BS		 2705 default:
2706 err = nfs4_handle_exception(server, err, &exception);
2707 }
1da177e4 2708 } while (exception.retry);
05e9cfb4 2709out:
1da177e4
LT		 2710 return err;
2711}
2712
8f70e95f
BS		 2713static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2714 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2715{
2716 struct rpc_auth *auth;
2717 int ret;
2718
2719 auth = rpcauth_create(flavor, server->client);
e8d920c5 2720 if (IS_ERR(auth)) {
75bc8821 2721 ret = -EACCES;
8f70e95f
BS		 2722 goto out;
2723 }
2724 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2725out:
2726 return ret;
2727}
2728
9a744ba3
CL		 2729/*
2730 * Retry pseudoroot lookup with various security flavors. We do this when:
2731 *
2732 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2733 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2734 *
2735 * Returns zero on success, or a negative NFS4ERR value, or a
2736 * negative errno value.
2737 */
801a16dc 2738static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2739 struct nfs_fsinfo *info)
1da177e4 2740{
9a744ba3
CL		 2741 /* Per 3530bis 15.33.5 */
2742 static const rpc_authflavor_t flav_array[] = {
2743 RPC_AUTH_GSS_KRB5P,
2744 RPC_AUTH_GSS_KRB5I,
2745 RPC_AUTH_GSS_KRB5,
c4eafe11 2746 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2747 RPC_AUTH_NULL,
2748 };
2749 int status = -EPERM;
2750 size_t i;
6a1a1e34 2751
9a744ba3 2752 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2753 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2754 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2755 continue;
2756 break;
8f70e95f 2757 }
9a744ba3 2758
fb8a5ba8
BS		 2759 /*
2760 * -EACCESS could mean that the user doesn't have correct permissions
2761 * to access the mount. It could also mean that we tried to mount
2762 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2763 * existing mount programs don't handle -EACCES very well so it should
2764 * be mapped to -EPERM instead.
2765 */
2766 if (status == -EACCES)
2767 status = -EPERM;
801a16dc
BS		 2768 return status;
2769}
2770
2ed4b95b
CL		 2771static int nfs4_do_find_root_sec(struct nfs_server *server,
2772 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2773{
2774 int mv = server->nfs_client->cl_minorversion;
2775 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2776}
2777
2778/**
2779 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2780 * @server: initialized nfs_server handle
2781 * @fhandle: we fill in the pseudo-fs root file handle
2782 * @info: we fill in an FSINFO struct
2783 *
2784 * Returns zero on success, or a negative errno.
801a16dc 2785 */
3028eb2b
BS		 2786int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2787 struct nfs_fsinfo *info)
801a16dc 2788{
2ed4b95b
CL		 2789 int status;
2790
2791 status = nfs4_lookup_root(server, fhandle, info);
2792 if ((status == -NFS4ERR_WRONGSEC) &&
2793 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2794 status = nfs4_do_find_root_sec(server, fhandle, info);
2795
1da177e4
LT		 2796 if (status == 0)
2797 status = nfs4_server_capabilities(server, fhandle);
2798 if (status == 0)
2799 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2800
c12e87f4 2801 return nfs4_map_errors(status);
1da177e4
LT		 2802}
2803
bae36241
BS		 2804static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2805 struct nfs_fsinfo *info)
2806{
2807 int error;
2808 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2809 struct nfs4_label *label = NULL;
bae36241
BS		 2810
2811 error = nfs4_server_capabilities(server, mntfh);
2812 if (error < 0) {
2813 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2814 return error;
2815 }
2816
14c43f76
DQ		 2817 label = nfs4_label_alloc(server, GFP_KERNEL);
2818 if (IS_ERR(label))
2819 return PTR_ERR(label);
2820
1775fd3e 2821 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2822 if (error < 0) {
2823 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2824 goto err_free_label;
bae36241
BS		 2825 }
2826
2827 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2828 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2829 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2830
14c43f76
DQ		 2831err_free_label:
2832 nfs4_label_free(label);
2833
bae36241
BS		 2834 return error;
2835}
2836
6b97fd3d
MN		 2837/*
2838 * Get locations and (maybe) other attributes of a referral.
2839 * Note that we'll actually follow the referral later when
2840 * we detect fsid mismatch in inode revalidation
2841 */
f05d147f
BS		 2842static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2843 const struct qstr *name, struct nfs_fattr *fattr,
2844 struct nfs_fh *fhandle)
6b97fd3d
MN		 2845{
2846 int status = -ENOMEM;
2847 struct page *page = NULL;
2848 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2849
2850 page = alloc_page(GFP_KERNEL);
2851 if (page == NULL)
2852 goto out;
2853 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2854 if (locations == NULL)
2855 goto out;
2856
f05d147f 2857 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2858 if (status != 0)
2859 goto out;
2860 /* Make sure server returned a different fsid for the referral */
2861 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2862 dprintk("%s: server did not return a different fsid for"
2863 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2864 status = -EIO;
2865 goto out;
2866 }
533eb461
AA		 2867 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2868 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2869
533eb461 2870 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2871 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2872 memset(fhandle, 0, sizeof(struct nfs_fh));
2873out:
2874 if (page)
2875 __free_page(page);
5d7ca35a 2876 kfree(locations);
6b97fd3d
MN		 2877 return status;
2878}
2879
1775fd3e
DQ		 2880static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2881 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2882{
2883 struct nfs4_getattr_arg args = {
2884 .fh = fhandle,
2885 .bitmask = server->attr_bitmask,
2886 };
2887 struct nfs4_getattr_res res = {
2888 .fattr = fattr,
1775fd3e 2889 .label = label,
1da177e4
LT		 2890 .server = server,
2891 };
2892 struct rpc_message msg = {
2893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2894 .rpc_argp = &args,
2895 .rpc_resp = &res,
2896 };
aa9c2669
DQ		 2897
2898 args.bitmask = nfs4_bitmask(server, label);
2899
0e574af1 2900 nfs_fattr_init(fattr);
7c513058 2901 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2902}
2903
1775fd3e
DQ		 2904static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2905 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2906{
2907 struct nfs4_exception exception = { };
2908 int err;
2909 do {
b5f875a9
TM		 2910 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
2911 trace_nfs4_getattr(server, fhandle, fattr, err);
2912 err = nfs4_handle_exception(server, err,
1da177e4
LT		 2913 &exception);
2914 } while (exception.retry);
2915 return err;
2916}
2917
2918/*
2919 * The file is not closed if it is opened due to the a request to change
2920 * the size of the file. The open call will not be needed once the
2921 * VFS layer lookup-intents are implemented.
2922 *
2923 * Close is called when the inode is destroyed.
2924 * If we haven't opened the file for O_WRONLY, we
2925 * need to in the size_change case to obtain a stateid.
2926 *
2927 * Got race?
2928 * Because OPEN is always done by name in nfsv4, it is
2929 * possible that we opened a different file by the same
2930 * name. We can recognize this race condition, but we
2931 * can't do anything about it besides returning an error.
2932 *
2933 * This will be fixed with VFS changes (lookup-intent).
2934 */
2935static int
2936nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2937 struct iattr *sattr)
2938{
08e9eac4 2939 struct inode *inode = dentry->d_inode;
659bfcd6 2940 struct rpc_cred *cred = NULL;
d530838b 2941 struct nfs4_state *state = NULL;
14c43f76 2942 struct nfs4_label *label = NULL;
1da177e4
LT		 2943 int status;
2944
8a1636c4 2945 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2946 pnfs_commit_and_return_layout(inode);
8a1636c4 2947
0e574af1 2948 nfs_fattr_init(fattr);
1da177e4 2949
2669940d
AA		 2950 /* Deal with open(O_TRUNC) */
2951 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2952 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2953
2954 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2955 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2956 return 0;
2957
d530838b 2958 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2959 if (sattr->ia_valid & ATTR_FILE) {
2960 struct nfs_open_context *ctx;
2961
2962 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2963 if (ctx) {
2964 cred = ctx->cred;
2965 state = ctx->state;
2966 }
659bfcd6 2967 }
08e9eac4 2968
14c43f76
DQ		 2969 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2970 if (IS_ERR(label))
2971 return PTR_ERR(label);
2972
2973 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2974 if (status == 0) {
65e4308d 2975 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2976 nfs_setsecurity(inode, fattr, label);
2977 }
14c43f76 2978 nfs4_label_free(label);
1da177e4
LT		 2979 return status;
2980}
2981
0c2e53f1
TM		 2982static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2983 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2984 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2985{
0c2e53f1 2986 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2987 int status;
2988 struct nfs4_lookup_arg args = {
2989 .bitmask = server->attr_bitmask,
0c2e53f1 2990 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2991 .name = name,
2992 };
2993 struct nfs4_lookup_res res = {
2994 .server = server,
2995 .fattr = fattr,
aa9c2669 2996 .label = label,
2b3de441
DH		 2997 .fh = fhandle,
2998 };
2999 struct rpc_message msg = {
3000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3001 .rpc_argp = &args,
3002 .rpc_resp = &res,
3003 };
3004
aa9c2669
DQ		 3005 args.bitmask = nfs4_bitmask(server, label);
3006
2b3de441
DH		 3007 nfs_fattr_init(fattr);
3008
1da177e4 3009 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3010 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3011 dprintk("NFS reply lookup: %d\n", status);
3012 return status;
3013}
3014
72de53ec 3015static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3016{
7ebb9315 3017 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3018 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3019 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3020 fattr->nlink = 2;
3021}
3022
72de53ec
BS		 3023static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3024 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3025 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3026{
3027 struct nfs4_exception exception = { };
72de53ec 3028 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3029 int err;
3030 do {
1775fd3e 3031 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3032 trace_nfs4_lookup(dir, name, err);
72de53ec 3033 switch (err) {
08ef7bd3 3034 case -NFS4ERR_BADNAME:
72de53ec
BS		 3035 err = -ENOENT;
3036 goto out;
0c2e53f1 3037 case -NFS4ERR_MOVED:
f05d147f 3038 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3039 goto out;
0c2e53f1 3040 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3041 err = -EPERM;
3042 if (client != *clnt)
3043 goto out;
3044
3045 client = nfs4_create_sec_client(client, dir, name);
3046 if (IS_ERR(client))
3047 return PTR_ERR(client);
3048
3049 exception.retry = 1;
3050 break;
3051 default:
3052 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3053 }
1da177e4 3054 } while (exception.retry);
72de53ec
BS		 3055
3056out:
3057 if (err == 0)
3058 *clnt = client;
3059 else if (client != *clnt)
3060 rpc_shutdown_client(client);
3061
1da177e4
LT		 3062 return err;
3063}
3064
80a16b21 3065static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3066 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3067 struct nfs4_label *label)
72de53ec
BS		 3068{
3069 int status;
3070 struct rpc_clnt *client = NFS_CLIENT(dir);
3071
1775fd3e 3072 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3073 if (client != NFS_CLIENT(dir)) {
3074 rpc_shutdown_client(client);
3075 nfs_fixup_secinfo_attributes(fattr);
3076 }
3077 return status;
3078}
3079
f05d147f
BS		 3080struct rpc_clnt *
3081nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3082 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3083{
3084 int status;
3085 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3086
1775fd3e 3087 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3088 if (status < 0) {
3089 rpc_shutdown_client(client);
3090 return ERR_PTR(status);
3091 }
3092 return client;
3093}
3094
1da177e4
LT		 3095static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3096{
76b32999 3097 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3098 struct nfs4_accessargs args = {
3099 .fh = NFS_FH(inode),
a4980e78 3100 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3101 };
3102 struct nfs4_accessres res = {
3103 .server = server,
1da177e4 3104 };
1da177e4
LT		 3105 struct rpc_message msg = {
3106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3107 .rpc_argp = &args,
3108 .rpc_resp = &res,
3109 .rpc_cred = entry->cred,
3110 };
3111 int mode = entry->mask;
aa9c2669 3112 int status = 0;
1da177e4
LT		 3113
3114 /*
3115 * Determine which access bits we want to ask for...
3116 */
3117 if (mode & MAY_READ)
3118 args.access |= NFS4_ACCESS_READ;
3119 if (S_ISDIR(inode->i_mode)) {
3120 if (mode & MAY_WRITE)
3121 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3122 if (mode & MAY_EXEC)
3123 args.access |= NFS4_ACCESS_LOOKUP;
3124 } else {
3125 if (mode & MAY_WRITE)
3126 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3127 if (mode & MAY_EXEC)
3128 args.access |= NFS4_ACCESS_EXECUTE;
3129 }
c407d41a
TM		 3130
3131 res.fattr = nfs_alloc_fattr();
3132 if (res.fattr == NULL)
3133 return -ENOMEM;
3134
7c513058 3135 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3136 if (!status) {
6168f62c 3137 nfs_access_set_mask(entry, res.access);
c407d41a 3138 nfs_refresh_inode(inode, res.fattr);
1da177e4 3139 }
c407d41a 3140 nfs_free_fattr(res.fattr);
1da177e4
LT		 3141 return status;
3142}
3143
3144static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3145{
3146 struct nfs4_exception exception = { };
3147 int err;
3148 do {
c1578b76
TM		 3149 err = _nfs4_proc_access(inode, entry);
3150 trace_nfs4_access(inode, err);
3151 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3152 &exception);
3153 } while (exception.retry);
3154 return err;
3155}
3156
3157/*
3158 * TODO: For the time being, we don't try to get any attributes
3159 * along with any of the zero-copy operations READ, READDIR,
3160 * READLINK, WRITE.
3161 *
3162 * In the case of the first three, we want to put the GETATTR
3163 * after the read-type operation -- this is because it is hard
3164 * to predict the length of a GETATTR response in v4, and thus
3165 * align the READ data correctly. This means that the GETATTR
3166 * may end up partially falling into the page cache, and we should
3167 * shift it into the 'tail' of the xdr_buf before processing.
3168 * To do this efficiently, we need to know the total length
3169 * of data received, which doesn't seem to be available outside
3170 * of the RPC layer.
3171 *
3172 * In the case of WRITE, we also want to put the GETATTR after
3173 * the operation -- in this case because we want to make sure
140150db 3174 * we get the post-operation mtime and size.
1da177e4
LT		 3175 *
3176 * Both of these changes to the XDR layer would in fact be quite
3177 * minor, but I decided to leave them for a subsequent patch.
3178 */
3179static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3180 unsigned int pgbase, unsigned int pglen)
3181{
3182 struct nfs4_readlink args = {
3183 .fh = NFS_FH(inode),
3184 .pgbase = pgbase,
3185 .pglen = pglen,
3186 .pages = &page,
3187 };
f50c7000 3188 struct nfs4_readlink_res res;
1da177e4
LT		 3189 struct rpc_message msg = {
3190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3191 .rpc_argp = &args,
f50c7000 3192 .rpc_resp = &res,
1da177e4
LT		 3193 };
3194
7c513058 3195 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3196}
3197
3198static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3199 unsigned int pgbase, unsigned int pglen)
3200{
3201 struct nfs4_exception exception = { };
3202 int err;
3203 do {
c1578b76
TM		 3204 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3205 trace_nfs4_readlink(inode, err);
3206 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3207 &exception);
3208 } while (exception.retry);
3209 return err;
3210}
3211
1da177e4 3212/*
8867fe58 3213 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3214 */
1da177e4
LT		 3215static int
3216nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3217 int flags)
1da177e4 3218{
aa9c2669 3219 struct nfs4_label l, *ilabel = NULL;
8867fe58 3220 struct nfs_open_context *ctx;
1da177e4 3221 struct nfs4_state *state;
1da177e4
LT		 3222 int status = 0;
3223
8867fe58
MS		 3224 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3225 if (IS_ERR(ctx))
3226 return PTR_ERR(ctx);
3227
aa9c2669
DQ		 3228 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3229
a8a5da99 3230 sattr->ia_mode &= ~current_umask();
959d921f 3231 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3232 if (IS_ERR(state)) {
3233 status = PTR_ERR(state);
c0204fd2 3234 goto out;
1da177e4 3235 }
1da177e4 3236out:
aa9c2669 3237 nfs4_label_release_security(ilabel);
8867fe58 3238 put_nfs_open_context(ctx);
1da177e4
LT		 3239 return status;
3240}
3241
3242static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3243{
16e42959 3244 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3245 struct nfs_removeargs args = {
1da177e4 3246 .fh = NFS_FH(dir),
26fe5750 3247 .name = *name,
16e42959 3248 };
4fdc17b2 3249 struct nfs_removeres res = {
16e42959 3250 .server = server,
1da177e4 3251 };
1da177e4 3252 struct rpc_message msg = {
4fdc17b2
TM		 3253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3254 .rpc_argp = &args,
3255 .rpc_resp = &res,
1da177e4 3256 };
778d2817 3257 int status;
1da177e4 3258
7c513058 3259 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3260 if (status == 0)
16e42959 3261 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3262 return status;
3263}
3264
3265static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3266{
3267 struct nfs4_exception exception = { };
3268 int err;
3269 do {
078ea3df
TM		 3270 err = _nfs4_proc_remove(dir, name);
3271 trace_nfs4_remove(dir, name, err);
3272 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3273 &exception);
3274 } while (exception.retry);
3275 return err;
3276}
3277
e4eff1a6 3278static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3279{
e4eff1a6
TM		 3280 struct nfs_server *server = NFS_SERVER(dir);
3281 struct nfs_removeargs *args = msg->rpc_argp;
3282 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3283
e4eff1a6 3284 res->server = server;
1da177e4 3285 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3286 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3287
3288 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3289}
3290
34e137cc
BS		 3291static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3292{
d9afbd1b
TM		 3293 nfs4_setup_sequence(NFS_SERVER(data->dir),
3294 &data->args.seq_args,
3295 &data->res.seq_res,
3296 task);
1da177e4
LT		 3297}
3298
e4eff1a6 3299static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3300{
078ea3df
TM		 3301 struct nfs_unlinkdata *data = task->tk_calldata;
3302 struct nfs_removeres *res = &data->res;
e4eff1a6 3303
14516c3a
TM		 3304 if (!nfs4_sequence_done(task, &res->seq_res))
3305 return 0;
9e33bed5 3306 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3307 return 0;
3308 update_changeattr(dir, &res->cinfo);
e4eff1a6 3309 return 1;
1da177e4
LT		 3310}
3311
d3d4152a
JL		 3312static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3313{
3314 struct nfs_server *server = NFS_SERVER(dir);
3315 struct nfs_renameargs *arg = msg->rpc_argp;
3316 struct nfs_renameres *res = msg->rpc_resp;
3317
3318 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3319 res->server = server;
9d12b216 3320 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3321}
3322
c6bfa1a1
BS		 3323static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3324{
d9afbd1b
TM		 3325 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3326 &data->args.seq_args,
3327 &data->res.seq_res,
3328 task);
d3d4152a
JL		 3329}
3330
3331static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3332 struct inode *new_dir)
3333{
fbc6f7c2
TM		 3334 struct nfs_renamedata *data = task->tk_calldata;
3335 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3336
3337 if (!nfs4_sequence_done(task, &res->seq_res))
3338 return 0;
3339 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3340 return 0;
3341
3342 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3343 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3344 return 1;
3345}
3346
1da177e4
LT		 3347static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3348 struct inode *new_dir, struct qstr *new_name)
3349{
6caf2c82 3350 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3351 struct nfs_renameargs arg = {
1da177e4
LT		 3352 .old_dir = NFS_FH(old_dir),
3353 .new_dir = NFS_FH(new_dir),
3354 .old_name = old_name,
3355 .new_name = new_name,
6caf2c82 3356 };
e8582a8b 3357 struct nfs_renameres res = {
6caf2c82 3358 .server = server,
1da177e4 3359 };
1da177e4
LT		 3360 struct rpc_message msg = {
3361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3362 .rpc_argp = &arg,
3363 .rpc_resp = &res,
3364 };
011fff72 3365 int status = -ENOMEM;
14c43f76 3366
7c513058 3367 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3368 if (!status) {
3369 update_changeattr(old_dir, &res.old_cinfo);
3370 update_changeattr(new_dir, &res.new_cinfo);
3371 }
3372 return status;
3373}
3374
3375static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3376 struct inode *new_dir, struct qstr *new_name)
3377{
3378 struct nfs4_exception exception = { };
3379 int err;
3380 do {
fbc6f7c2
TM		 3381 err = _nfs4_proc_rename(old_dir, old_name,
3382 new_dir, new_name);
3383 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3384 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3385 &exception);
3386 } while (exception.retry);
3387 return err;
3388}
3389
3390static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3391{
91ba2eee 3392 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3393 struct nfs4_link_arg arg = {
3394 .fh = NFS_FH(inode),
3395 .dir_fh = NFS_FH(dir),
3396 .name = name,
91ba2eee
TM		 3397 .bitmask = server->attr_bitmask,
3398 };
91ba2eee
TM		 3399 struct nfs4_link_res res = {
3400 .server = server,
1775fd3e 3401 .label = NULL,
1da177e4 3402 };
1da177e4
LT		 3403 struct rpc_message msg = {
3404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3405 .rpc_argp = &arg,
91ba2eee 3406 .rpc_resp = &res,
1da177e4 3407 };
136f2627
TM		 3408 int status = -ENOMEM;
3409
3410 res.fattr = nfs_alloc_fattr();
778d2817 3411 if (res.fattr == NULL)
136f2627 3412 goto out;
1da177e4 3413
14c43f76
DQ		 3414 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3415 if (IS_ERR(res.label)) {
3416 status = PTR_ERR(res.label);
3417 goto out;
3418 }
aa9c2669 3419 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3420
7c513058 3421 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3422 if (!status) {
3423 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3424 status = nfs_post_op_update_inode(inode, res.fattr);
3425 if (!status)
3426 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3427 }
14c43f76
DQ		 3428
3429
3430 nfs4_label_free(res.label);
3431
136f2627 3432out:
136f2627 3433 nfs_free_fattr(res.fattr);
1da177e4
LT		 3434 return status;
3435}
3436
3437static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3438{
3439 struct nfs4_exception exception = { };
3440 int err;
3441 do {
3442 err = nfs4_handle_exception(NFS_SERVER(inode),
3443 _nfs4_proc_link(inode, dir, name),
3444 &exception);
3445 } while (exception.retry);
3446 return err;
3447}
3448
57dc9a57
TM		 3449struct nfs4_createdata {
3450 struct rpc_message msg;
3451 struct nfs4_create_arg arg;
3452 struct nfs4_create_res res;
3453 struct nfs_fh fh;
3454 struct nfs_fattr fattr;
1775fd3e 3455 struct nfs4_label *label;
57dc9a57
TM		 3456};
3457
3458static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3459 struct qstr *name, struct iattr *sattr, u32 ftype)
3460{
3461 struct nfs4_createdata *data;
3462
3463 data = kzalloc(sizeof(*data), GFP_KERNEL);
3464 if (data != NULL) {
3465 struct nfs_server *server = NFS_SERVER(dir);
3466
14c43f76
DQ		 3467 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3468 if (IS_ERR(data->label))
3469 goto out_free;
3470
57dc9a57
TM		 3471 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3472 data->msg.rpc_argp = &data->arg;
3473 data->msg.rpc_resp = &data->res;
3474 data->arg.dir_fh = NFS_FH(dir);
3475 data->arg.server = server;
3476 data->arg.name = name;
3477 data->arg.attrs = sattr;
3478 data->arg.ftype = ftype;
aa9c2669 3479 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3480 data->res.server = server;
3481 data->res.fh = &data->fh;
3482 data->res.fattr = &data->fattr;
1775fd3e 3483 data->res.label = data->label;
57dc9a57 3484 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3485 }
3486 return data;
14c43f76
DQ		 3487out_free:
3488 kfree(data);
3489 return NULL;
57dc9a57
TM		 3490}
3491
3492static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3493{
7c513058 3494 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3495 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3496 if (status == 0) {
3497 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3498 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3499 }
3500 return status;
3501}
3502
3503static void nfs4_free_createdata(struct nfs4_createdata *data)
3504{
14c43f76 3505 nfs4_label_free(data->label);
57dc9a57
TM		 3506 kfree(data);
3507}
3508
4f390c15 3509static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3510 struct page *page, unsigned int len, struct iattr *sattr,
3511 struct nfs4_label *label)
1da177e4 3512{
57dc9a57
TM		 3513 struct nfs4_createdata *data;
3514 int status = -ENAMETOOLONG;
1da177e4 3515
94a6d753 3516 if (len > NFS4_MAXPATHLEN)
57dc9a57 3517 goto out;
4f390c15 3518
57dc9a57
TM		 3519 status = -ENOMEM;
3520 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3521 if (data == NULL)
3522 goto out;
3523
3524 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3525 data->arg.u.symlink.pages = &page;
3526 data->arg.u.symlink.len = len;
1775fd3e 3527 data->arg.label = label;
1da177e4 3528
57dc9a57
TM		 3529 status = nfs4_do_create(dir, dentry, data);
3530
3531 nfs4_free_createdata(data);
3532out:
1da177e4
LT		 3533 return status;
3534}
3535
4f390c15 3536static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3537 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3538{
3539 struct nfs4_exception exception = { };
aa9c2669 3540 struct nfs4_label l, *label = NULL;
1da177e4 3541 int err;
aa9c2669
DQ		 3542
3543 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3544
1da177e4 3545 do {
078ea3df
TM		 3546 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3547 trace_nfs4_symlink(dir, &dentry->d_name, err);
3548 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3549 &exception);
3550 } while (exception.retry);
aa9c2669
DQ		 3551
3552 nfs4_label_release_security(label);
1da177e4
LT		 3553 return err;
3554}
3555
3556static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3557 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3558{
57dc9a57
TM		 3559 struct nfs4_createdata *data;
3560 int status = -ENOMEM;
1da177e4 3561
57dc9a57
TM		 3562 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3563 if (data == NULL)
3564 goto out;
3565
1775fd3e 3566 data->arg.label = label;
57dc9a57
TM		 3567 status = nfs4_do_create(dir, dentry, data);
3568
3569 nfs4_free_createdata(data);
3570out:
1da177e4
LT		 3571 return status;
3572}
3573
3574static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3575 struct iattr *sattr)
3576{
3577 struct nfs4_exception exception = { };
aa9c2669 3578 struct nfs4_label l, *label = NULL;
1da177e4 3579 int err;
a8a5da99 3580
aa9c2669
DQ		 3581 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3582
a8a5da99 3583 sattr->ia_mode &= ~current_umask();
1da177e4 3584 do {
078ea3df
TM		 3585 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3586 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3587 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3588 &exception);
3589 } while (exception.retry);
aa9c2669
DQ		 3590 nfs4_label_release_security(label);
3591
1da177e4
LT		 3592 return err;
3593}
3594
3595static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3596 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3597{
3598 struct inode *dir = dentry->d_inode;
3599 struct nfs4_readdir_arg args = {
3600 .fh = NFS_FH(dir),
56e4ebf8 3601 .pages = pages,
1da177e4
LT		 3602 .pgbase = 0,
3603 .count = count,
96d25e53 3604 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3605 .plus = plus,
1da177e4
LT		 3606 };
3607 struct nfs4_readdir_res res;
3608 struct rpc_message msg = {
3609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3610 .rpc_argp = &args,
3611 .rpc_resp = &res,
3612 .rpc_cred = cred,
3613 };
3614 int status;
3615
3110ff80 3616 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3617 dentry->d_parent->d_name.name,
3618 dentry->d_name.name,
3619 (unsigned long long)cookie);
c3f52af3 3620 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3621 res.pgbase = args.pgbase;
7c513058 3622 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3623 if (status >= 0) {
c3f52af3 3624 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3625 status += args.pgbase;
3626 }
c4812998
TM		 3627
3628 nfs_invalidate_atime(dir);
3629
3110ff80 3630 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3631 return status;
3632}
3633
3634static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3635 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3636{
3637 struct nfs4_exception exception = { };
3638 int err;
3639 do {
c1578b76
TM		 3640 err = _nfs4_proc_readdir(dentry, cred, cookie,
3641 pages, count, plus);
3642 trace_nfs4_readdir(dentry->d_inode, err);
3643 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3644 &exception);
3645 } while (exception.retry);
3646 return err;
3647}
3648
3649static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3650 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3651{
57dc9a57
TM		 3652 struct nfs4_createdata *data;
3653 int mode = sattr->ia_mode;
3654 int status = -ENOMEM;
1da177e4 3655
57dc9a57
TM		 3656 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3657 if (data == NULL)
3658 goto out;
3659
1da177e4 3660 if (S_ISFIFO(mode))
57dc9a57 3661 data->arg.ftype = NF4FIFO;
1da177e4 3662 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3663 data->arg.ftype = NF4BLK;
3664 data->arg.u.device.specdata1 = MAJOR(rdev);
3665 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3666 }
3667 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3668 data->arg.ftype = NF4CHR;
3669 data->arg.u.device.specdata1 = MAJOR(rdev);
3670 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3671 } else if (!S_ISSOCK(mode)) {
3672 status = -EINVAL;
3673 goto out_free;
1da177e4 3674 }
1775fd3e 3675
aa9c2669 3676 data->arg.label = label;
57dc9a57 3677 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3678out_free:
57dc9a57
TM		 3679 nfs4_free_createdata(data);
3680out:
1da177e4
LT		 3681 return status;
3682}
3683
3684static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3685 struct iattr *sattr, dev_t rdev)
3686{
3687 struct nfs4_exception exception = { };
aa9c2669 3688 struct nfs4_label l, *label = NULL;
1da177e4 3689 int err;
a8a5da99 3690
aa9c2669
DQ		 3691 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3692
a8a5da99 3693 sattr->ia_mode &= ~current_umask();
1da177e4 3694 do {
078ea3df
TM		 3695 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3696 trace_nfs4_mknod(dir, &dentry->d_name, err);
3697 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3698 &exception);
3699 } while (exception.retry);
aa9c2669
DQ		 3700
3701 nfs4_label_release_security(label);
3702
1da177e4
LT		 3703 return err;
3704}
3705
3706static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3707 struct nfs_fsstat *fsstat)
3708{
3709 struct nfs4_statfs_arg args = {
3710 .fh = fhandle,
3711 .bitmask = server->attr_bitmask,
3712 };
24ad148a
BH		 3713 struct nfs4_statfs_res res = {
3714 .fsstat = fsstat,
3715 };
1da177e4
LT		 3716 struct rpc_message msg = {
3717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3718 .rpc_argp = &args,
24ad148a 3719 .rpc_resp = &res,
1da177e4
LT		 3720 };
3721
0e574af1 3722 nfs_fattr_init(fsstat->fattr);
7c513058 3723 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3724}
3725
3726static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3727{
3728 struct nfs4_exception exception = { };
3729 int err;
3730 do {
3731 err = nfs4_handle_exception(server,
3732 _nfs4_proc_statfs(server, fhandle, fsstat),
3733 &exception);
3734 } while (exception.retry);
3735 return err;
3736}
3737
3738static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3739 struct nfs_fsinfo *fsinfo)
3740{
3741 struct nfs4_fsinfo_arg args = {
3742 .fh = fhandle,
3743 .bitmask = server->attr_bitmask,
3744 };
3dda5e43
BH		 3745 struct nfs4_fsinfo_res res = {
3746 .fsinfo = fsinfo,
3747 };
1da177e4
LT		 3748 struct rpc_message msg = {
3749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3750 .rpc_argp = &args,
3dda5e43 3751 .rpc_resp = &res,
1da177e4
LT		 3752 };
3753
7c513058 3754 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3755}
3756
3757static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3758{
3759 struct nfs4_exception exception = { };
83ca7f5a 3760 unsigned long now = jiffies;
1da177e4
LT		 3761 int err;
3762
3763 do {
83ca7f5a 3764 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3765 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3766 if (err == 0) {
3767 struct nfs_client *clp = server->nfs_client;
3768
3769 spin_lock(&clp->cl_lock);
3770 clp->cl_lease_time = fsinfo->lease_time * HZ;
3771 clp->cl_last_renewal = now;
3772 spin_unlock(&clp->cl_lock);
3773 break;
3774 }
3775 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3776 } while (exception.retry);
3777 return err;
3778}
3779
3780static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3781{
e38eb650
BS		 3782 int error;
3783
0e574af1 3784 nfs_fattr_init(fsinfo->fattr);
e38eb650 3785 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3786 if (error == 0) {
3787 /* block layout checks this! */
3788 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3789 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3790 }
e38eb650
BS		 3791
3792 return error;
1da177e4
LT		 3793}
3794
3795static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3796 struct nfs_pathconf *pathconf)
3797{
3798 struct nfs4_pathconf_arg args = {
3799 .fh = fhandle,
3800 .bitmask = server->attr_bitmask,
3801 };
d45b2989
BH		 3802 struct nfs4_pathconf_res res = {
3803 .pathconf = pathconf,
3804 };
1da177e4
LT		 3805 struct rpc_message msg = {
3806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3807 .rpc_argp = &args,
d45b2989 3808 .rpc_resp = &res,
1da177e4
LT		 3809 };
3810
3811 /* None of the pathconf attributes are mandatory to implement */
3812 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3813 memset(pathconf, 0, sizeof(*pathconf));
3814 return 0;
3815 }
3816
0e574af1 3817 nfs_fattr_init(pathconf->fattr);
7c513058 3818 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3819}
3820
3821static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3822 struct nfs_pathconf *pathconf)
3823{
3824 struct nfs4_exception exception = { };
3825 int err;
3826
3827 do {
3828 err = nfs4_handle_exception(server,
3829 _nfs4_proc_pathconf(server, fhandle, pathconf),
3830 &exception);
3831 } while (exception.retry);
3832 return err;
3833}
3834
5521abfd 3835int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3836 const struct nfs_open_context *ctx,
3837 const struct nfs_lock_context *l_ctx,
3838 fmode_t fmode)
3839{
3840 const struct nfs_lockowner *lockowner = NULL;
3841
3842 if (l_ctx != NULL)
3843 lockowner = &l_ctx->lockowner;
5521abfd 3844 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3845}
3846EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3847
5521abfd
TM		 3848static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3849 const struct nfs_open_context *ctx,
3850 const struct nfs_lock_context *l_ctx,
3851 fmode_t fmode)
3852{
3853 nfs4_stateid current_stateid;
3854
3855 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3856 return false;
3857 return nfs4_stateid_match(stateid, &current_stateid);
3858}
3859
3860static bool nfs4_error_stateid_expired(int err)
3861{
3862 switch (err) {
3863 case -NFS4ERR_DELEG_REVOKED:
3864 case -NFS4ERR_ADMIN_REVOKED:
3865 case -NFS4ERR_BAD_STATEID:
3866 case -NFS4ERR_STALE_STATEID:
3867 case -NFS4ERR_OLD_STATEID:
3868 case -NFS4ERR_OPENMODE:
3869 case -NFS4ERR_EXPIRED:
3870 return true;
3871 }
3872 return false;
3873}
3874
d20581aa
BH		 3875void __nfs4_read_done_cb(struct nfs_read_data *data)
3876{
cd841605 3877 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3878}
3879
cbdabc7f 3880static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3881{
cd841605 3882 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3883
9e33bed5 3884 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3885 rpc_restart_call_prepare(task);
ec06c096 3886 return -EAGAIN;
1da177e4 3887 }
8850df99 3888
d20581aa 3889 __nfs4_read_done_cb(data);
1da177e4 3890 if (task->tk_status > 0)
ec06c096
TM		 3891 renew_lease(server, data->timestamp);
3892 return 0;
1da177e4
LT		 3893}
3894
5521abfd
TM		 3895static bool nfs4_read_stateid_changed(struct rpc_task *task,
3896 struct nfs_readargs *args)
3897{
3898
3899 if (!nfs4_error_stateid_expired(task->tk_status) ||
3900 nfs4_stateid_is_current(&args->stateid,
3901 args->context,
3902 args->lock_context,
3903 FMODE_READ))
3904 return false;
3905 rpc_restart_call_prepare(task);
3906 return true;
3907}
3908
cbdabc7f
AA		 3909static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3910{
3911
3912 dprintk("--> %s\n", __func__);
3913
3914 if (!nfs4_sequence_done(task, &data->res.seq_res))
3915 return -EAGAIN;
5521abfd
TM		 3916 if (nfs4_read_stateid_changed(task, &data->args))
3917 return -EAGAIN;
d20581aa
BH		 3918 return data->read_done_cb ? data->read_done_cb(task, data) :
3919 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3920}
3921
bdc7f021 3922static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3923{
1da177e4 3924 data->timestamp = jiffies;
cbdabc7f 3925 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3926 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3927 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3928}
3929
ea7c3303
BS		 3930static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3931{
9b206149 3932 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3933 &data->args.seq_args,
3934 &data->res.seq_res,
9b206149
TM		 3935 task))
3936 return;
3937 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3938 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3939}
3940
b029bc9b 3941static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3942{
cd841605 3943 struct inode *inode = data->header->inode;
1da177e4 3944
9e33bed5 3945 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3946 rpc_restart_call_prepare(task);
788e7a89 3947 return -EAGAIN;
1da177e4 3948 }
4f9838c7 3949 if (task->tk_status >= 0) {
1da177e4 3950 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3951 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3952 }
788e7a89 3953 return 0;
1da177e4
LT		 3954}
3955
5521abfd
TM		 3956static bool nfs4_write_stateid_changed(struct rpc_task *task,
3957 struct nfs_writeargs *args)
3958{
3959
3960 if (!nfs4_error_stateid_expired(task->tk_status) ||
3961 nfs4_stateid_is_current(&args->stateid,
3962 args->context,
3963 args->lock_context,
3964 FMODE_WRITE))
3965 return false;
3966 rpc_restart_call_prepare(task);
3967 return true;
3968}
3969
b029bc9b
FI		 3970static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3971{
3972 if (!nfs4_sequence_done(task, &data->res.seq_res))
3973 return -EAGAIN;
5521abfd
TM		 3974 if (nfs4_write_stateid_changed(task, &data->args))
3975 return -EAGAIN;
d20581aa
BH		 3976 return data->write_done_cb ? data->write_done_cb(task, data) :
3977 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3978}
3979
5a37f851
TM		 3980static
3981bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3982{
5a37f851
TM		 3983 const struct nfs_pgio_header *hdr = data->header;
3984
3985 /* Don't request attributes for pNFS or O_DIRECT writes */
3986 if (data->ds_clp != NULL || hdr->dreq != NULL)
3987 return false;
3988 /* Otherwise, request attributes if and only if we don't hold
3989 * a delegation
3990 */
011e2a7f 3991 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3992}
a69aef14 3993
bdc7f021 3994static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3995{
cd841605 3996 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3997
5a37f851 3998 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3999 data->args.bitmask = NULL;
4000 data->res.fattr = NULL;
4001 } else
4002 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4003
b029bc9b
FI		 4004 if (!data->write_done_cb)
4005 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4006 data->res.server = server;
1da177e4
LT		 4007 data->timestamp = jiffies;
4008
bdc7f021 4009 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 4010 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4011}
4012
c6cb80d0
BS		 4013static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4014{
9b206149 4015 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4016 &data->args.seq_args,
4017 &data->res.seq_res,
9b206149
TM		 4018 task))
4019 return;
4020 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4021 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4022}
4023
0b7c0153 4024static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4025{
d9afbd1b
TM		 4026 nfs4_setup_sequence(NFS_SERVER(data->inode),
4027 &data->args.seq_args,
4028 &data->res.seq_res,
4029 task);
1da177e4
LT		 4030}
4031
0b7c0153 4032static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4033{
1da177e4 4034 struct inode *inode = data->inode;
14516c3a 4035
9e33bed5 4036 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4037 rpc_restart_call_prepare(task);
788e7a89 4038 return -EAGAIN;
1da177e4 4039 }
788e7a89 4040 return 0;
1da177e4
LT		 4041}
4042
0b7c0153 4043static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4044{
4045 if (!nfs4_sequence_done(task, &data->res.seq_res))
4046 return -EAGAIN;
0b7c0153 4047 return data->commit_done_cb(task, data);
5f452431
FI		 4048}
4049
0b7c0153 4050static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4051{
788e7a89 4052 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4053
0b7c0153
FI		 4054 if (data->commit_done_cb == NULL)
4055 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4056 data->res.server = server;
bdc7f021 4057 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4058 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4059}
4060
9bc4e3ca
CL		 4061struct nfs4_renewdata {
4062 struct nfs_client *client;
4063 unsigned long timestamp;
4064};
4065
1da177e4
LT		 4066/*
4067 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4068 * standalone procedure for queueing an asynchronous RENEW.
4069 */
9bc4e3ca 4070static void nfs4_renew_release(void *calldata)
dc96aef9 4071{
9bc4e3ca
CL		 4072 struct nfs4_renewdata *data = calldata;
4073 struct nfs_client *clp = data->client;
dc96aef9 4074
0851de06
AB		 4075 if (atomic_read(&clp->cl_count) > 1)
4076 nfs4_schedule_state_renewal(clp);
4077 nfs_put_client(clp);
9bc4e3ca 4078 kfree(data);
dc96aef9
AB		 4079}
4080
9bc4e3ca 4081static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4082{
9bc4e3ca
CL		 4083 struct nfs4_renewdata *data = calldata;
4084 struct nfs_client *clp = data->client;
4085 unsigned long timestamp = data->timestamp;
1da177e4 4086
c6d01c6f 4087 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4088 if (task->tk_status < 0) {
95baa25c 4089 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4090 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4091 return;
4092 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4093 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4094 return;
4095 }
4096 nfs4_schedule_path_down_recovery(clp);
1da177e4 4097 }
452e9352 4098 do_renew_lease(clp, timestamp);
1da177e4
LT		 4099}
4100
963d8fe5
TM		 4101static const struct rpc_call_ops nfs4_renew_ops = {
4102 .rpc_call_done = nfs4_renew_done,
dc96aef9 4103 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4104};
4105
2f60ea6b 4106static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4107{
4108 struct rpc_message msg = {
4109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4110 .rpc_argp = clp,
b4454fe1 4111 .rpc_cred = cred,
1da177e4 4112 };
9bc4e3ca 4113 struct nfs4_renewdata *data;
1da177e4 4114
2f60ea6b
TM		 4115 if (renew_flags == 0)
4116 return 0;
0851de06
AB		 4117 if (!atomic_inc_not_zero(&clp->cl_count))
4118 return -EIO;
b569ad34 4119 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4120 if (data == NULL)
4121 return -ENOMEM;
4122 data->client = clp;
4123 data->timestamp = jiffies;
bc7a05ca 4124 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4125 &nfs4_renew_ops, data);
1da177e4
LT		 4126}
4127
8534d4ec 4128static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4129{
4130 struct rpc_message msg = {
4131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4132 .rpc_argp = clp,
b4454fe1 4133 .rpc_cred = cred,
1da177e4
LT		 4134 };
4135 unsigned long now = jiffies;
4136 int status;
4137
bc7a05ca 4138 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4139 if (status < 0)
4140 return status;
452e9352 4141 do_renew_lease(clp, now);
1da177e4
LT		 4142 return 0;
4143}
4144
aa1870af
BF		 4145static inline int nfs4_server_supports_acls(struct nfs_server *server)
4146{
4147 return (server->caps & NFS_CAP_ACLS)
4148 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4149 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4150}
4151
21f498c2
TM		 4152/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4153 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4154 * the stack.
4155 */
21f498c2 4156#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4157
e9e3d724
NH		 4158static int buf_to_pages_noslab(const void *buf, size_t buflen,
4159 struct page **pages, unsigned int *pgbase)
4160{
4161 struct page *newpage, **spages;
4162 int rc = 0;
4163 size_t len;
4164 spages = pages;
4165
4166 do {
21f498c2 4167 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4168 newpage = alloc_page(GFP_KERNEL);
4169
4170 if (newpage == NULL)
4171 goto unwind;
4172 memcpy(page_address(newpage), buf, len);
4173 buf += len;
4174 buflen -= len;
4175 *pages++ = newpage;
4176 rc++;
4177 } while (buflen != 0);
4178
4179 return rc;
4180
4181unwind:
4182 for(; rc > 0; rc--)
4183 __free_page(spages[rc-1]);
4184 return -ENOMEM;
4185}
4186
e50a1c2e
BF		 4187struct nfs4_cached_acl {
4188 int cached;
4189 size_t len;
3e9d4154 4190 char data[0];
e50a1c2e
BF		 4191};
4192
4193static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4194{
4195 struct nfs_inode *nfsi = NFS_I(inode);
4196
4197 spin_lock(&inode->i_lock);
4198 kfree(nfsi->nfs4_acl);
4199 nfsi->nfs4_acl = acl;
4200 spin_unlock(&inode->i_lock);
4201}
4202
4203static void nfs4_zap_acl_attr(struct inode *inode)
4204{
4205 nfs4_set_cached_acl(inode, NULL);
4206}
4207
4208static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4209{
4210 struct nfs_inode *nfsi = NFS_I(inode);
4211 struct nfs4_cached_acl *acl;
4212 int ret = -ENOENT;
4213
4214 spin_lock(&inode->i_lock);
4215 acl = nfsi->nfs4_acl;
4216 if (acl == NULL)
4217 goto out;
4218 if (buf == NULL) /* user is just asking for length */
4219 goto out_len;
4220 if (acl->cached == 0)
4221 goto out;
4222 ret = -ERANGE; /* see getxattr(2) man page */
4223 if (acl->len > buflen)
4224 goto out;
4225 memcpy(buf, acl->data, acl->len);
4226out_len:
4227 ret = acl->len;
4228out:
4229 spin_unlock(&inode->i_lock);
4230 return ret;
4231}
4232
5794d21e 4233static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4234{
4235 struct nfs4_cached_acl *acl;
b291f1b1 4236 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4237
1f1ea6c2 4238 if (buflen <= PAGE_SIZE) {
b291f1b1 4239 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4240 if (acl == NULL)
4241 goto out;
4242 acl->cached = 1;
5794d21e 4243 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4244 } else {
4245 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4246 if (acl == NULL)
4247 goto out;
4248 acl->cached = 0;
4249 }
4250 acl->len = acl_len;
4251out:
4252 nfs4_set_cached_acl(inode, acl);
4253}
4254
bf118a34
AA		 4255/*
4256 * The getxattr API returns the required buffer length when called with a
4257 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4258 * the required buf. On a NULL buf, we send a page of data to the server
4259 * guessing that the ACL request can be serviced by a page. If so, we cache
4260 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4261 * the cache. If not so, we throw away the page, and cache the required
4262 * length. The next getxattr call will then produce another round trip to
4263 * the server, this time with the input buf of the required size.
4264 */
16b4289c 4265static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4266{
bf118a34 4267 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4268 struct nfs_getaclargs args = {
4269 .fh = NFS_FH(inode),
4270 .acl_pages = pages,
4271 .acl_len = buflen,
4272 };
663c79b3
BH		 4273 struct nfs_getaclres res = {
4274 .acl_len = buflen,
4275 };
aa1870af
BF		 4276 struct rpc_message msg = {
4277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4278 .rpc_argp = &args,
663c79b3 4279 .rpc_resp = &res,
aa1870af 4280 };
21f498c2
TM		 4281 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4282 int ret = -ENOMEM, i;
aa1870af 4283
bf118a34
AA		 4284 /* As long as we're doing a round trip to the server anyway,
4285 * let's be prepared for a page of acl data. */
4286 if (npages == 0)
4287 npages = 1;
21f498c2
TM		 4288 if (npages > ARRAY_SIZE(pages))
4289 return -ERANGE;
5a006899 4290
bf118a34
AA		 4291 for (i = 0; i < npages; i++) {
4292 pages[i] = alloc_page(GFP_KERNEL);
4293 if (!pages[i])
4294 goto out_free;
e50a1c2e 4295 }
5a006899
SP		 4296
4297 /* for decoding across pages */
4298 res.acl_scratch = alloc_page(GFP_KERNEL);
4299 if (!res.acl_scratch)
4300 goto out_free;
4301
bf118a34
AA		 4302 args.acl_len = npages * PAGE_SIZE;
4303 args.acl_pgbase = 0;
5a006899 4304
de040bec 4305 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4306 __func__, buf, buflen, npages, args.acl_len);
4307 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4308 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4309 if (ret)
4310 goto out_free;
bf118a34 4311
1f1ea6c2
TM		 4312 /* Handle the case where the passed-in buffer is too short */
4313 if (res.acl_flags & NFS4_ACL_TRUNC) {
4314 /* Did the user only issue a request for the acl length? */
4315 if (buf == NULL)
4316 goto out_ok;
e50a1c2e 4317 ret = -ERANGE;
1f1ea6c2 4318 goto out_free;
e50a1c2e 4319 }
1f1ea6c2 4320 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4321 if (buf) {
4322 if (res.acl_len > buflen) {
4323 ret = -ERANGE;
4324 goto out_free;
4325 }
1f1ea6c2 4326 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4327 }
1f1ea6c2
TM		 4328out_ok:
4329 ret = res.acl_len;
e50a1c2e 4330out_free:
bf118a34
AA		 4331 for (i = 0; i < npages; i++)
4332 if (pages[i])
4333 __free_page(pages[i]);
331818f1
TM		 4334 if (res.acl_scratch)
4335 __free_page(res.acl_scratch);
aa1870af
BF		 4336 return ret;
4337}
4338
16b4289c
TM		 4339static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4340{
4341 struct nfs4_exception exception = { };
4342 ssize_t ret;
4343 do {
4344 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4345 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4346 if (ret >= 0)
4347 break;
4348 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4349 } while (exception.retry);
4350 return ret;
4351}
4352
e50a1c2e
BF		 4353static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4354{
4355 struct nfs_server *server = NFS_SERVER(inode);
4356 int ret;
4357
4358 if (!nfs4_server_supports_acls(server))
4359 return -EOPNOTSUPP;
4360 ret = nfs_revalidate_inode(server, inode);
4361 if (ret < 0)
4362 return ret;
08a22b39
AK		 4363 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4364 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4365 ret = nfs4_read_cached_acl(inode, buf, buflen);
4366 if (ret != -ENOENT)
bf118a34
AA		 4367 /* -ENOENT is returned if there is no ACL or if there is an ACL
4368 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4369 return ret;
4370 return nfs4_get_acl_uncached(inode, buf, buflen);
4371}
4372
16b4289c 4373static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4374{
4375 struct nfs_server *server = NFS_SERVER(inode);
4376 struct page *pages[NFS4ACL_MAXPAGES];
4377 struct nfs_setaclargs arg = {
4378 .fh = NFS_FH(inode),
4379 .acl_pages = pages,
4380 .acl_len = buflen,
4381 };
73c403a9 4382 struct nfs_setaclres res;
4b580ee3
BF		 4383 struct rpc_message msg = {
4384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4385 .rpc_argp = &arg,
73c403a9 4386 .rpc_resp = &res,
4b580ee3 4387 };
21f498c2 4388 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4389 int ret, i;
4b580ee3
BF		 4390
4391 if (!nfs4_server_supports_acls(server))
4392 return -EOPNOTSUPP;
21f498c2
TM		 4393 if (npages > ARRAY_SIZE(pages))
4394 return -ERANGE;
e9e3d724
NH		 4395 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4396 if (i < 0)
4397 return i;
57ec14c5 4398 nfs4_inode_return_delegation(inode);
7c513058 4399 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4400
4401 /*
4402 * Free each page after tx, so the only ref left is
4403 * held by the network stack
4404 */
4405 for (; i > 0; i--)
4406 put_page(pages[i-1]);
4407
08a22b39
AK		 4408 /*
4409 * Acl update can result in inode attribute update.
4410 * so mark the attribute cache invalid.
4411 */
4412 spin_lock(&inode->i_lock);
4413 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4414 spin_unlock(&inode->i_lock);
f41f7418
TM		 4415 nfs_access_zap_cache(inode);
4416 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4417 return ret;
4418}
4419
16b4289c
TM		 4420static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4421{
4422 struct nfs4_exception exception = { };
4423 int err;
4424 do {
c1578b76
TM		 4425 err = __nfs4_proc_set_acl(inode, buf, buflen);
4426 trace_nfs4_set_acl(inode, err);
4427 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4428 &exception);
4429 } while (exception.retry);
4430 return err;
4431}
4432
aa9c2669
DQ		 4433#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4434static int _nfs4_get_security_label(struct inode *inode, void *buf,
4435 size_t buflen)
4436{
4437 struct nfs_server *server = NFS_SERVER(inode);
4438 struct nfs_fattr fattr;
4439 struct nfs4_label label = {0, 0, buflen, buf};
4440
4441 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4442 struct nfs4_getattr_arg args = {
4443 .fh = NFS_FH(inode),
4444 .bitmask = bitmask,
4445 };
4446 struct nfs4_getattr_res res = {
4447 .fattr = &fattr,
4448 .label = &label,
4449 .server = server,
4450 };
4451 struct rpc_message msg = {
4452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4453 .rpc_argp = &args,
4454 .rpc_resp = &res,
4455 };
4456 int ret;
4457
4458 nfs_fattr_init(&fattr);
4459
4460 ret = rpc_call_sync(server->client, &msg, 0);
4461 if (ret)
4462 return ret;
4463 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4464 return -ENOENT;
4465 if (buflen < label.len)
4466 return -ERANGE;
4467 return 0;
4468}
4469
4470static int nfs4_get_security_label(struct inode *inode, void *buf,
4471 size_t buflen)
4472{
4473 struct nfs4_exception exception = { };
4474 int err;
4475
4476 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4477 return -EOPNOTSUPP;
4478
4479 do {
c1578b76
TM		 4480 err = _nfs4_get_security_label(inode, buf, buflen);
4481 trace_nfs4_get_security_label(inode, err);
4482 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4483 &exception);
4484 } while (exception.retry);
4485 return err;
4486}
4487
4488static int _nfs4_do_set_security_label(struct inode *inode,
4489 struct nfs4_label *ilabel,
4490 struct nfs_fattr *fattr,
4491 struct nfs4_label *olabel)
4492{
4493
4494 struct iattr sattr = {0};
4495 struct nfs_server *server = NFS_SERVER(inode);
4496 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4497 struct nfs_setattrargs args = {
4498 .fh = NFS_FH(inode),
4499 .iap = &sattr,
4500 .server = server,
4501 .bitmask = bitmask,
4502 .label = ilabel,
4503 };
4504 struct nfs_setattrres res = {
4505 .fattr = fattr,
4506 .label = olabel,
4507 .server = server,
4508 };
4509 struct rpc_message msg = {
4510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4511 .rpc_argp = &args,
4512 .rpc_resp = &res,
4513 };
4514 int status;
4515
4516 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4517
4518 status = rpc_call_sync(server->client, &msg, 0);
4519 if (status)
4520 dprintk("%s failed: %d\n", __func__, status);
4521
4522 return status;
4523}
4524
4525static int nfs4_do_set_security_label(struct inode *inode,
4526 struct nfs4_label *ilabel,
4527 struct nfs_fattr *fattr,
4528 struct nfs4_label *olabel)
4529{
4530 struct nfs4_exception exception = { };
4531 int err;
4532
4533 do {
c1578b76
TM		 4534 err = _nfs4_do_set_security_label(inode, ilabel,
4535 fattr, olabel);
4536 trace_nfs4_set_security_label(inode, err);
4537 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4538 &exception);
4539 } while (exception.retry);
4540 return err;
4541}
4542
4543static int
4544nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4545{
4546 struct nfs4_label ilabel, *olabel = NULL;
4547 struct nfs_fattr fattr;
4548 struct rpc_cred *cred;
4549 struct inode *inode = dentry->d_inode;
4550 int status;
4551
4552 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4553 return -EOPNOTSUPP;
4554
4555 nfs_fattr_init(&fattr);
4556
4557 ilabel.pi = 0;
4558 ilabel.lfs = 0;
4559 ilabel.label = (char *)buf;
4560 ilabel.len = buflen;
4561
4562 cred = rpc_lookup_cred();
4563 if (IS_ERR(cred))
4564 return PTR_ERR(cred);
4565
4566 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4567 if (IS_ERR(olabel)) {
4568 status = -PTR_ERR(olabel);
4569 goto out;
4570 }
4571
4572 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4573 if (status == 0)
4574 nfs_setsecurity(inode, &fattr, olabel);
4575
4576 nfs4_label_free(olabel);
4577out:
4578 put_rpccred(cred);
4579 return status;
4580}
4581#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4582
4583
1da177e4 4584static int
aa5190d0 4585nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4586{
aa5190d0
TM		 4587 struct nfs_client *clp = server->nfs_client;
4588
4589 if (task->tk_status >= 0)
1da177e4
LT		 4590 return 0;
4591 switch(task->tk_status) {
a1d0b5ee 4592 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4593 case -NFS4ERR_ADMIN_REVOKED:
4594 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4595 if (state == NULL)
4596 break;
4597 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4598 case -NFS4ERR_OPENMODE:
4599 if (state == NULL)
4600 break;
5d422301
TM		 4601 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4602 goto stateid_invalid;
0400a6b0 4603 goto wait_on_recovery;
0ced63d1 4604 case -NFS4ERR_EXPIRED:
5d422301
TM		 4605 if (state != NULL) {
4606 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4607 goto stateid_invalid;
4608 }
1da177e4 4609 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4610 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4611 nfs4_schedule_lease_recovery(clp);
4612 goto wait_on_recovery;
4745e315
AA		 4613#if defined(CONFIG_NFS_V4_1)
4614 case -NFS4ERR_BADSESSION:
4615 case -NFS4ERR_BADSLOT:
4616 case -NFS4ERR_BAD_HIGH_SLOT:
4617 case -NFS4ERR_DEADSESSION:
4618 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4619 case -NFS4ERR_SEQ_FALSE_RETRY:
4620 case -NFS4ERR_SEQ_MISORDERED:
4621 dprintk("%s ERROR %d, Reset session\n", __func__,
4622 task->tk_status);
9f594791 4623 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4624 task->tk_status = 0;
4625 return -EAGAIN;
4626#endif /* CONFIG_NFS_V4_1 */
1da177e4 4627 case -NFS4ERR_DELAY:
aa5190d0 4628 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4629 case -NFS4ERR_GRACE:
1da177e4
LT		 4630 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4631 task->tk_status = 0;
4632 return -EAGAIN;
a8a4ae3a 4633 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4634 case -NFS4ERR_OLD_STATEID:
4635 task->tk_status = 0;
4636 return -EAGAIN;
4637 }
4638 task->tk_status = nfs4_map_errors(task->tk_status);
4639 return 0;
5d422301
TM		 4640stateid_invalid:
4641 task->tk_status = -EIO;
4642 return 0;
0400a6b0 4643wait_on_recovery:
a2c0b9e2 4644 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4645 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4646 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4647 task->tk_status = 0;
4648 return -EAGAIN;
1da177e4
LT		 4649}
4650
f092075d
CL		 4651static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4652 nfs4_verifier *bootverf)
cd93710e
CL		 4653{
4654 __be32 verf[2];
4655
2c820d9a
CL		 4656 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4657 /* An impossible timestamp guarantees this value
4658 * will never match a generated boot time. */
4659 verf[0] = 0;
17f26b12 4660 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4661 } else {
f092075d 4662 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4663 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4664 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4665 }
cd93710e
CL		 4666 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4667}
4668
e984a55a
CL		 4669static unsigned int
4670nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4671 char *buf, size_t len)
4672{
4673 unsigned int result;
4674
4675 rcu_read_lock();
4676 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4677 clp->cl_ipaddr,
4678 rpc_peeraddr2str(clp->cl_rpcclient,
4679 RPC_DISPLAY_ADDR),
4680 rpc_peeraddr2str(clp->cl_rpcclient,
4681 RPC_DISPLAY_PROTO));
4682 rcu_read_unlock();
4683 return result;
4684}
4685
4686static unsigned int
4687nfs4_init_uniform_client_string(const struct nfs_client *clp,
4688 char *buf, size_t len)
4689{
55b59293 4690 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4691
4692 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4693 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4694 clp->rpc_ops->version,
4695 clp->cl_minorversion,
4696 nfs4_client_id_uniquifier,
4697 nodename);
e984a55a
CL		 4698 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4699 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4700 nodename);
e984a55a
CL		 4701}
4702
6bbb4ae8
CL		 4703/**
4704 * nfs4_proc_setclientid - Negotiate client ID
4705 * @clp: state data structure
4706 * @program: RPC program for NFSv4 callback service
4707 * @port: IP port number for NFS4 callback service
4708 * @cred: RPC credential to use for this call
4709 * @res: where to place the result
4710 *
4711 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4712 */
bb8b27e5
TM		 4713int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4714 unsigned short port, struct rpc_cred *cred,
4715 struct nfs4_setclientid_res *res)
1da177e4
LT		 4716{
4717 nfs4_verifier sc_verifier;
4718 struct nfs4_setclientid setclientid = {
4719 .sc_verifier = &sc_verifier,
4720 .sc_prog = program,
f4eecd5d 4721 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4722 };
4723 struct rpc_message msg = {
4724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4725 .rpc_argp = &setclientid,
bb8b27e5 4726 .rpc_resp = res,
286d7d6a 4727 .rpc_cred = cred,
1da177e4 4728 };
6bbb4ae8 4729 int status;
1da177e4 4730
de734831 4731 /* nfs_client_id4 */
f092075d 4732 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4733 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4734 setclientid.sc_name_len =
4735 nfs4_init_uniform_client_string(clp,
4736 setclientid.sc_name,
4737 sizeof(setclientid.sc_name));
4738 else
4739 setclientid.sc_name_len =
4740 nfs4_init_nonuniform_client_string(clp,
4741 setclientid.sc_name,
4742 sizeof(setclientid.sc_name));
de734831 4743 /* cb_client4 */
e984a55a 4744 rcu_read_lock();
de734831 4745 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4746 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4747 rpc_peeraddr2str(clp->cl_rpcclient,
4748 RPC_DISPLAY_NETID));
de734831
CL		 4749 rcu_read_unlock();
4750 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4751 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4752 clp->cl_ipaddr, port >> 8, port & 255);
4753
6bbb4ae8
CL		 4754 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4755 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4756 setclientid.sc_name_len, setclientid.sc_name);
4757 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4758 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4759 dprintk("NFS reply setclientid: %d\n", status);
4760 return status;
1da177e4
LT		 4761}
4762
6bbb4ae8
CL		 4763/**
4764 * nfs4_proc_setclientid_confirm - Confirm client ID
4765 * @clp: state data structure
4766 * @res: result of a previous SETCLIENTID
4767 * @cred: RPC credential to use for this call
4768 *
4769 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4770 */
fd954ae1 4771int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4772 struct nfs4_setclientid_res *arg,
4773 struct rpc_cred *cred)
1da177e4 4774{
1da177e4
LT		 4775 struct rpc_message msg = {
4776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4777 .rpc_argp = arg,
286d7d6a 4778 .rpc_cred = cred,
1da177e4 4779 };
1da177e4
LT		 4780 int status;
4781
6bbb4ae8
CL		 4782 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4783 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4784 clp->cl_clientid);
1bd714f2 4785 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4786 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4787 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4788 return status;
4789}
4790
fe650407
TM		 4791struct nfs4_delegreturndata {
4792 struct nfs4_delegreturnargs args;
fa178f29 4793 struct nfs4_delegreturnres res;
fe650407
TM		 4794 struct nfs_fh fh;
4795 nfs4_stateid stateid;
26e976a8 4796 unsigned long timestamp;
fa178f29 4797 struct nfs_fattr fattr;
fe650407
TM		 4798 int rpc_status;
4799};
4800
fe650407
TM		 4801static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4802{
4803 struct nfs4_delegreturndata *data = calldata;
938e1010 4804
14516c3a
TM		 4805 if (!nfs4_sequence_done(task, &data->res.seq_res))
4806 return;
938e1010 4807
ca8acf8d 4808 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4809 switch (task->tk_status) {
4810 case -NFS4ERR_STALE_STATEID:
4811 case -NFS4ERR_EXPIRED:
4812 case 0:
fa178f29 4813 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4814 break;
4815 default:
4816 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4817 -EAGAIN) {
d00c5d43 4818 rpc_restart_call_prepare(task);
79708861
RL		 4819 return;
4820 }
4821 }
4822 data->rpc_status = task->tk_status;
fe650407
TM		 4823}
4824
4825static void nfs4_delegreturn_release(void *calldata)
4826{
fe650407
TM		 4827 kfree(calldata);
4828}
4829
938e1010
AA		 4830#if defined(CONFIG_NFS_V4_1)
4831static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4832{
4833 struct nfs4_delegreturndata *d_data;
4834
4835 d_data = (struct nfs4_delegreturndata *)data;
4836
d9afbd1b
TM		 4837 nfs4_setup_sequence(d_data->res.server,
4838 &d_data->args.seq_args,
4839 &d_data->res.seq_res,
4840 task);
938e1010
AA		 4841}
4842#endif /* CONFIG_NFS_V4_1 */
4843
c8d149f3 4844static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4845#if defined(CONFIG_NFS_V4_1)
4846 .rpc_call_prepare = nfs4_delegreturn_prepare,
4847#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4848 .rpc_call_done = nfs4_delegreturn_done,
4849 .rpc_release = nfs4_delegreturn_release,
4850};
4851
e6f81075 4852static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4853{
4854 struct nfs4_delegreturndata *data;
fa178f29 4855 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4856 struct rpc_task *task;
5138fde0
TM		 4857 struct rpc_message msg = {
4858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4859 .rpc_cred = cred,
4860 };
c970aa85
TM		 4861 struct rpc_task_setup task_setup_data = {
4862 .rpc_client = server->client,
5138fde0 4863 .rpc_message = &msg,
c970aa85
TM		 4864 .callback_ops = &nfs4_delegreturn_ops,
4865 .flags = RPC_TASK_ASYNC,
4866 };
e6f81075 4867 int status = 0;
fe650407 4868
8535b2be 4869 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4870 if (data == NULL)
4871 return -ENOMEM;
9d12b216 4872 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4873 data->args.fhandle = &data->fh;
4874 data->args.stateid = &data->stateid;
9e907fec 4875 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4876 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4877 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4878 data->res.fattr = &data->fattr;
4879 data->res.server = server;
5138fde0 4880 nfs_fattr_init(data->res.fattr);
26e976a8 4881 data->timestamp = jiffies;
fe650407
TM		 4882 data->rpc_status = 0;
4883
c970aa85 4884 task_setup_data.callback_data = data;
1174dd1f
TM		 4885 msg.rpc_argp = &data->args;
4886 msg.rpc_resp = &data->res;
c970aa85 4887 task = rpc_run_task(&task_setup_data);
7a1218a2 4888 if (IS_ERR(task))
fe650407 4889 return PTR_ERR(task);
e6f81075
TM		 4890 if (!issync)
4891 goto out;
fe650407 4892 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4893 if (status != 0)
4894 goto out;
4895 status = data->rpc_status;
e144cbcc
TM		 4896 if (status == 0)
4897 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4898 else
4899 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4900out:
e6b3c4db 4901 rpc_put_task(task);
fe650407 4902 return status;
1da177e4
LT		 4903}
4904
e6f81075 4905int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4906{
4907 struct nfs_server *server = NFS_SERVER(inode);
4908 struct nfs4_exception exception = { };
4909 int err;
4910 do {
e6f81075 4911 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 4912 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 4913 switch (err) {
4914 case -NFS4ERR_STALE_STATEID:
4915 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4916 case 0:
4917 return 0;
4918 }
4919 err = nfs4_handle_exception(server, err, &exception);
4920 } while (exception.retry);
4921 return err;
4922}
4923
4924#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4925#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4926
4927/*
4928 * sleep, with exponential backoff, and retry the LOCK operation.
4929 */
4930static unsigned long
4931nfs4_set_lock_task_retry(unsigned long timeout)
4932{
416ad3c9 4933 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4934 timeout <<= 1;
4935 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4936 return NFS4_LOCK_MAXTIMEOUT;
4937 return timeout;
4938}
4939
1da177e4
LT		 4940static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4941{
4942 struct inode *inode = state->inode;
4943 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4944 struct nfs_client *clp = server->nfs_client;
911d1aaf 4945 struct nfs_lockt_args arg = {
1da177e4 4946 .fh = NFS_FH(inode),
911d1aaf 4947 .fl = request,
1da177e4 4948 };
911d1aaf
TM		 4949 struct nfs_lockt_res res = {
4950 .denied = request,
1da177e4
LT		 4951 };
4952 struct rpc_message msg = {
4953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4954 .rpc_argp = &arg,
4955 .rpc_resp = &res,
4956 .rpc_cred = state->owner->so_cred,
4957 };
1da177e4
LT		 4958 struct nfs4_lock_state *lsp;
4959 int status;
4960
911d1aaf 4961 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4962 status = nfs4_set_lock_state(state, request);
4963 if (status != 0)
4964 goto out;
4965 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4966 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4967 arg.lock_owner.s_dev = server->s_dev;
7c513058 4968 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4969 switch (status) {
4970 case 0:
4971 request->fl_type = F_UNLCK;
4972 break;
4973 case -NFS4ERR_DENIED:
4974 status = 0;
1da177e4 4975 }
70cc6487 4976 request->fl_ops->fl_release_private(request);
8d0a8a9d 4977out:
1da177e4
LT		 4978 return status;
4979}
4980
4981static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4982{
4983 struct nfs4_exception exception = { };
4984 int err;
4985
4986 do {
d1b748a5
TM		 4987 err = _nfs4_proc_getlk(state, cmd, request);
4988 trace_nfs4_get_lock(request, state, cmd, err);
4989 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 4990 &exception);
4991 } while (exception.retry);
4992 return err;
4993}
4994
4995static int do_vfs_lock(struct file *file, struct file_lock *fl)
4996{
4997 int res = 0;
4998 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4999 case FL_POSIX:
5000 res = posix_lock_file_wait(file, fl);
5001 break;
5002 case FL_FLOCK:
5003 res = flock_lock_file_wait(file, fl);
5004 break;
5005 default:
5006 BUG();
5007 }
1da177e4
LT		 5008 return res;
5009}
5010
faf5f49c 5011struct nfs4_unlockdata {
911d1aaf
TM		 5012 struct nfs_locku_args arg;
5013 struct nfs_locku_res res;
faf5f49c
TM		 5014 struct nfs4_lock_state *lsp;
5015 struct nfs_open_context *ctx;
911d1aaf
TM		 5016 struct file_lock fl;
5017 const struct nfs_server *server;
26e976a8 5018 unsigned long timestamp;
faf5f49c
TM		 5019};
5020
911d1aaf
TM		 5021static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5022 struct nfs_open_context *ctx,
5023 struct nfs4_lock_state *lsp,
5024 struct nfs_seqid *seqid)
5025{
5026 struct nfs4_unlockdata *p;
5027 struct inode *inode = lsp->ls_state->inode;
5028
8535b2be 5029 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5030 if (p == NULL)
5031 return NULL;
5032 p->arg.fh = NFS_FH(inode);
5033 p->arg.fl = &p->fl;
5034 p->arg.seqid = seqid;
c1d51931 5035 p->res.seqid = seqid;
911d1aaf
TM		 5036 p->arg.stateid = &lsp->ls_stateid;
5037 p->lsp = lsp;
5038 atomic_inc(&lsp->ls_count);
5039 /* Ensure we don't close file until we're done freeing locks! */
5040 p->ctx = get_nfs_open_context(ctx);
5041 memcpy(&p->fl, fl, sizeof(p->fl));
5042 p->server = NFS_SERVER(inode);
5043 return p;
5044}
5045
06f814a3 5046static void nfs4_locku_release_calldata(void *data)
faf5f49c 5047{
963d8fe5 5048 struct nfs4_unlockdata *calldata = data;
911d1aaf 5049 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5050 nfs4_put_lock_state(calldata->lsp);
5051 put_nfs_open_context(calldata->ctx);
5052 kfree(calldata);
faf5f49c
TM		 5053}
5054
963d8fe5 5055static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5056{
963d8fe5 5057 struct nfs4_unlockdata *calldata = data;
faf5f49c 5058
14516c3a
TM		 5059 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5060 return;
faf5f49c
TM		 5061 switch (task->tk_status) {
5062 case 0:
f597c537
TM		 5063 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5064 &calldata->res.stateid);
26e976a8 5065 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5066 break;
9e33bed5
TM		 5067 case -NFS4ERR_BAD_STATEID:
5068 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5069 case -NFS4ERR_STALE_STATEID:
5070 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5071 break;
5072 default:
9e33bed5 5073 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5074 rpc_restart_call_prepare(task);
faf5f49c 5075 }
2b1bc308 5076 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5077}
5078
4ce70ada 5079static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5080{
4ce70ada 5081 struct nfs4_unlockdata *calldata = data;
faf5f49c 5082
911d1aaf 5083 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5084 goto out_wait;
795a88c9 5085 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5086 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5087 goto out_no_action;
faf5f49c 5088 }
26e976a8 5089 calldata->timestamp = jiffies;
035168ab 5090 if (nfs4_setup_sequence(calldata->server,
a893693c 5091 &calldata->arg.seq_args,
2240a9e2
TM		 5092 &calldata->res.seq_res,
5093 task) != 0)
5094 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5095 return;
5096out_no_action:
5097 task->tk_action = NULL;
5098out_wait:
5099 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5100}
5101
963d8fe5 5102static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5103 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5104 .rpc_call_done = nfs4_locku_done,
06f814a3 5105 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5106};
5107
a5d16a4d
TM		 5108static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5109 struct nfs_open_context *ctx,
5110 struct nfs4_lock_state *lsp,
5111 struct nfs_seqid *seqid)
5112{
5113 struct nfs4_unlockdata *data;
5138fde0
TM		 5114 struct rpc_message msg = {
5115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5116 .rpc_cred = ctx->cred,
5117 };
c970aa85
TM		 5118 struct rpc_task_setup task_setup_data = {
5119 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5120 .rpc_message = &msg,
c970aa85 5121 .callback_ops = &nfs4_locku_ops,
101070ca 5122 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5123 .flags = RPC_TASK_ASYNC,
5124 };
a5d16a4d 5125
137d6aca
FF		 5126 /* Ensure this is an unlock - when canceling a lock, the
5127 * canceled lock is passed in, and it won't be an unlock.
5128 */
5129 fl->fl_type = F_UNLCK;
5130
a5d16a4d
TM		 5131 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5132 if (data == NULL) {
5133 nfs_free_seqid(seqid);
5134 return ERR_PTR(-ENOMEM);
5135 }
5136
9d12b216 5137 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5138 msg.rpc_argp = &data->arg;
5139 msg.rpc_resp = &data->res;
c970aa85
TM		 5140 task_setup_data.callback_data = data;
5141 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5142}
5143
faf5f49c
TM		 5144static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5145{
65b62a29
TM		 5146 struct inode *inode = state->inode;
5147 struct nfs4_state_owner *sp = state->owner;
5148 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5149 struct nfs_seqid *seqid;
1da177e4 5150 struct nfs4_lock_state *lsp;
06f814a3
TM		 5151 struct rpc_task *task;
5152 int status = 0;
536ff0f8 5153 unsigned char fl_flags = request->fl_flags;
faf5f49c 5154
8d0a8a9d 5155 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5156 /* Unlock _before_ we do the RPC call */
5157 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5158 /* Exclude nfs_delegation_claim_locks() */
5159 mutex_lock(&sp->so_delegreturn_mutex);
5160 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5161 down_read(&nfsi->rwsem);
5162 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5163 up_read(&nfsi->rwsem);
65b62a29 5164 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5165 goto out;
19e03c57
TM		 5166 }
5167 up_read(&nfsi->rwsem);
65b62a29 5168 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5169 if (status != 0)
9b073574
TM		 5170 goto out;
5171 /* Is this a delegated lock? */
8d0a8a9d 5172 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5173 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5174 goto out;
8535b2be 5175 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5176 status = -ENOMEM;
911d1aaf 5177 if (seqid == NULL)
9b073574 5178 goto out;
cd3758e3 5179 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5180 status = PTR_ERR(task);
5181 if (IS_ERR(task))
9b073574 5182 goto out;
a5d16a4d 5183 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5184 rpc_put_task(task);
9b073574 5185out:
536ff0f8 5186 request->fl_flags = fl_flags;
d1b748a5 5187 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5188 return status;
5189}
5190
a5d16a4d
TM		 5191struct nfs4_lockdata {
5192 struct nfs_lock_args arg;
5193 struct nfs_lock_res res;
5194 struct nfs4_lock_state *lsp;
5195 struct nfs_open_context *ctx;
5196 struct file_lock fl;
26e976a8 5197 unsigned long timestamp;
a5d16a4d
TM		 5198 int rpc_status;
5199 int cancelled;
66179efe 5200 struct nfs_server *server;
a5d16a4d
TM		 5201};
5202
5203static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5204 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5205 gfp_t gfp_mask)
1da177e4 5206{
a5d16a4d
TM		 5207 struct nfs4_lockdata *p;
5208 struct inode *inode = lsp->ls_state->inode;
1da177e4 5209 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5210
8535b2be 5211 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5212 if (p == NULL)
5213 return NULL;
5214
5215 p->arg.fh = NFS_FH(inode);
5216 p->arg.fl = &p->fl;
8535b2be 5217 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5218 if (p->arg.open_seqid == NULL)
5219 goto out_free;
8535b2be 5220 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5221 if (p->arg.lock_seqid == NULL)
2f74c0a0 5222 goto out_free_seqid;
a5d16a4d 5223 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5224 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5225 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5226 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5227 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5228 p->lsp = lsp;
66179efe 5229 p->server = server;
a5d16a4d
TM		 5230 atomic_inc(&lsp->ls_count);
5231 p->ctx = get_nfs_open_context(ctx);
5232 memcpy(&p->fl, fl, sizeof(p->fl));
5233 return p;
2f74c0a0
TM		 5234out_free_seqid:
5235 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5236out_free:
5237 kfree(p);
5238 return NULL;
5239}
5240
5241static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5242{
5243 struct nfs4_lockdata *data = calldata;
5244 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5245
3110ff80 5246 dprintk("%s: begin!\n", __func__);
2f74c0a0 5247 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5248 goto out_wait;
a5d16a4d
TM		 5249 /* Do we need to do an open_to_lock_owner? */
5250 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5251 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5252 goto out_release_lock_seqid;
8fe72bac 5253 }
8e472f33 5254 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5255 data->arg.new_lock_owner = 1;
c1d51931 5256 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5257 } else
5258 data->arg.new_lock_owner = 0;
5d422301
TM		 5259 if (!nfs4_valid_open_stateid(state)) {
5260 data->rpc_status = -EBADF;
5261 task->tk_action = NULL;
5262 goto out_release_open_seqid;
5263 }
26e976a8 5264 data->timestamp = jiffies;
035168ab
TM		 5265 if (nfs4_setup_sequence(data->server,
5266 &data->arg.seq_args,
2240a9e2 5267 &data->res.seq_res,
d9afbd1b 5268 task) == 0)
66179efe 5269 return;
5d422301 5270out_release_open_seqid:
2240a9e2
TM		 5271 nfs_release_seqid(data->arg.open_seqid);
5272out_release_lock_seqid:
5273 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5274out_wait:
5275 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5276 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5277}
5278
a5d16a4d
TM		 5279static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5280{
5281 struct nfs4_lockdata *data = calldata;
5282
3110ff80 5283 dprintk("%s: begin!\n", __func__);
a5d16a4d 5284
14516c3a
TM		 5285 if (!nfs4_sequence_done(task, &data->res.seq_res))
5286 return;
66179efe 5287
a5d16a4d 5288 data->rpc_status = task->tk_status;
a5d16a4d 5289 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5290 if (data->rpc_status == 0)
5291 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5292 else
5293 goto out;
5294 }
5295 if (data->rpc_status == 0) {
f597c537 5296 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5297 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5298 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5299 }
a5d16a4d 5300out:
3110ff80 5301 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5302}
5303
5304static void nfs4_lock_release(void *calldata)
5305{
5306 struct nfs4_lockdata *data = calldata;
5307
3110ff80 5308 dprintk("%s: begin!\n", __func__);
2f74c0a0 5309 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5310 if (data->cancelled != 0) {
5311 struct rpc_task *task;
5312 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5313 data->arg.lock_seqid);
5314 if (!IS_ERR(task))
bf294b41 5315 rpc_put_task_async(task);
3110ff80 5316 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5317 } else
5318 nfs_free_seqid(data->arg.lock_seqid);
5319 nfs4_put_lock_state(data->lsp);
5320 put_nfs_open_context(data->ctx);
5321 kfree(data);
3110ff80 5322 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5323}
5324
5325static const struct rpc_call_ops nfs4_lock_ops = {
5326 .rpc_call_prepare = nfs4_lock_prepare,
5327 .rpc_call_done = nfs4_lock_done,
5328 .rpc_release = nfs4_lock_release,
5329};
5330
2bee72a6
TM		 5331static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5332{
2bee72a6
TM		 5333 switch (error) {
5334 case -NFS4ERR_ADMIN_REVOKED:
5335 case -NFS4ERR_BAD_STATEID:
ecac799a 5336 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5337 if (new_lock_owner != 0 ||
795a88c9 5338 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5339 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5340 break;
5341 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5342 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5343 case -NFS4ERR_EXPIRED:
5344 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5345 };
5346}
5347
afe6c27c 5348static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5349{
5350 struct nfs4_lockdata *data;
5351 struct rpc_task *task;
5138fde0
TM		 5352 struct rpc_message msg = {
5353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5354 .rpc_cred = state->owner->so_cred,
5355 };
c970aa85
TM		 5356 struct rpc_task_setup task_setup_data = {
5357 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5358 .rpc_message = &msg,
c970aa85 5359 .callback_ops = &nfs4_lock_ops,
101070ca 5360 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5361 .flags = RPC_TASK_ASYNC,
5362 };
a5d16a4d
TM		 5363 int ret;
5364
3110ff80 5365 dprintk("%s: begin!\n", __func__);
cd3758e3 5366 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5367 fl->fl_u.nfs4_fl.owner,
5368 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5369 if (data == NULL)
5370 return -ENOMEM;
5371 if (IS_SETLKW(cmd))
5372 data->arg.block = 1;
9d12b216 5373 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5374 msg.rpc_argp = &data->arg;
5375 msg.rpc_resp = &data->res;
c970aa85 5376 task_setup_data.callback_data = data;
8fe72bac
TM		 5377 if (recovery_type > NFS_LOCK_NEW) {
5378 if (recovery_type == NFS_LOCK_RECLAIM)
5379 data->arg.reclaim = NFS_LOCK_RECLAIM;
5380 nfs4_set_sequence_privileged(&data->arg.seq_args);
5381 }
c970aa85 5382 task = rpc_run_task(&task_setup_data);
7a1218a2 5383 if (IS_ERR(task))
a5d16a4d 5384 return PTR_ERR(task);
a5d16a4d
TM		 5385 ret = nfs4_wait_for_completion_rpc_task(task);
5386 if (ret == 0) {
5387 ret = data->rpc_status;
2bee72a6
TM		 5388 if (ret)
5389 nfs4_handle_setlk_error(data->server, data->lsp,
5390 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5391 } else
5392 data->cancelled = 1;
e6b3c4db 5393 rpc_put_task(task);
3110ff80 5394 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5395 return ret;
1da177e4
LT		 5396}
5397
5398static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5399{
202b50dc 5400 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5401 struct nfs4_exception exception = {
5402 .inode = state->inode,
5403 };
202b50dc
TM		 5404 int err;
5405
5406 do {
42a2d13e
TM		 5407 /* Cache the lock if possible... */
5408 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5409 return 0;
afe6c27c 5410 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5411 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5412 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5413 break;
5414 nfs4_handle_exception(server, err, &exception);
5415 } while (exception.retry);
5416 return err;
1da177e4
LT		 5417}
5418
5419static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5420{
202b50dc 5421 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5422 struct nfs4_exception exception = {
5423 .inode = state->inode,
5424 };
202b50dc
TM		 5425 int err;
5426
6bfc93ef
TM		 5427 err = nfs4_set_lock_state(state, request);
5428 if (err != 0)
5429 return err;
202b50dc 5430 do {
42a2d13e
TM		 5431 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5432 return 0;
afe6c27c 5433 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5434 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5435 switch (err) {
5436 default:
5437 goto out;
5438 case -NFS4ERR_GRACE:
5439 case -NFS4ERR_DELAY:
5440 nfs4_handle_exception(server, err, &exception);
5441 err = 0;
5442 }
202b50dc 5443 } while (exception.retry);
a9ed2e25 5444out:
202b50dc 5445 return err;
1da177e4
LT		 5446}
5447
f062eb6c 5448#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5449/**
5450 * nfs41_check_expired_locks - possibly free a lock stateid
5451 *
5452 * @state: NFSv4 state for an inode
5453 *
5454 * Returns NFS_OK if recovery for this stateid is now finished.
5455 * Otherwise a negative NFS4ERR value is returned.
5456 */
b01dd1d8 5457static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5458{
eb64cf96 5459 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5460 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5461 struct nfs_server *server = NFS_SERVER(state->inode);
5462
b01dd1d8 5463 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5464 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5465 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5466
5467 status = nfs41_test_stateid(server,
5468 &lsp->ls_stateid,
5469 cred);
b01dd1d8 5470 if (status != NFS_OK) {
3e60ffdd
CL		 5471 /* Free the stateid unless the server
5472 * informs us the stateid is unrecognized. */
89af2739
CL		 5473 if (status != -NFS4ERR_BAD_STATEID)
5474 nfs41_free_stateid(server,
ab7cb0df
TM		 5475 &lsp->ls_stateid,
5476 cred);
795a88c9 5477 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5478 ret = status;
5479 }
5480 }
5481 };
5482
5483 return ret;
5484}
5485
5486static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5487{
5488 int status = NFS_OK;
5489
5490 if (test_bit(LK_STATE_IN_USE, &state->flags))
5491 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5492 if (status != NFS_OK)
5493 status = nfs4_lock_expired(state, request);
5494 return status;
f062eb6c
BS		 5495}
5496#endif
5497
1da177e4
LT		 5498static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5499{
9a99af49 5500 struct nfs4_state_owner *sp = state->owner;
19e03c57 5501 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5502 unsigned char fl_flags = request->fl_flags;
9a99af49 5503 unsigned int seq;
8e469ebd 5504 int status = -ENOLCK;
1da177e4 5505
8e469ebd
TM		 5506 if ((fl_flags & FL_POSIX) &&
5507 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5508 goto out;
6bfc93ef 5509 /* Is this a delegated open? */
6bfc93ef
TM		 5510 status = nfs4_set_lock_state(state, request);
5511 if (status != 0)
5512 goto out;
01c3b861
TM		 5513 request->fl_flags |= FL_ACCESS;
5514 status = do_vfs_lock(request->fl_file, request);
5515 if (status < 0)
5516 goto out;
19e03c57 5517 down_read(&nfsi->rwsem);
01c3b861 5518 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5519 /* Yes: cache locks! */
01c3b861 5520 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5521 request->fl_flags = fl_flags & ~FL_SLEEP;
5522 status = do_vfs_lock(request->fl_file, request);
5523 goto out_unlock;
01c3b861 5524 }
9a99af49
TM		 5525 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5526 up_read(&nfsi->rwsem);
afe6c27c 5527 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5528 if (status != 0)
9a99af49
TM		 5529 goto out;
5530 down_read(&nfsi->rwsem);
5531 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5532 status = -NFS4ERR_DELAY;
01c3b861 5533 goto out_unlock;
9a99af49 5534 }
6bfc93ef 5535 /* Note: we always want to sleep here! */
01c3b861 5536 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5537 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5538 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5539 "manager!\n", __func__);
01c3b861 5540out_unlock:
19e03c57 5541 up_read(&nfsi->rwsem);
01c3b861
TM		 5542out:
5543 request->fl_flags = fl_flags;
1da177e4
LT		 5544 return status;
5545}
5546
5547static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5548{
a1d0b5ee
TM		 5549 struct nfs4_exception exception = {
5550 .state = state,
05ffe24f 5551 .inode = state->inode,
a1d0b5ee 5552 };
1da177e4
LT		 5553 int err;
5554
5555 do {
965b5d67 5556 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5557 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5558 if (err == -NFS4ERR_DENIED)
5559 err = -EAGAIN;
1da177e4 5560 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5561 err, &exception);
1da177e4
LT		 5562 } while (exception.retry);
5563 return err;
5564}
5565
5566static int
5567nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5568{
5569 struct nfs_open_context *ctx;
5570 struct nfs4_state *state;
5571 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5572 int status;
5573
5574 /* verify open state */
cd3758e3 5575 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5576 state = ctx->state;
5577
5578 if (request->fl_start < 0 || request->fl_end < 0)
5579 return -EINVAL;
5580
d953126a
TM		 5581 if (IS_GETLK(cmd)) {
5582 if (state != NULL)
5583 return nfs4_proc_getlk(state, F_GETLK, request);
5584 return 0;
5585 }
1da177e4
LT		 5586
5587 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5588 return -EINVAL;
5589
d953126a
TM		 5590 if (request->fl_type == F_UNLCK) {
5591 if (state != NULL)
5592 return nfs4_proc_unlck(state, cmd, request);
5593 return 0;
5594 }
1da177e4 5595
d953126a
TM		 5596 if (state == NULL)
5597 return -ENOLCK;
55725513
TM		 5598 /*
5599 * Don't rely on the VFS having checked the file open mode,
5600 * since it won't do this for flock() locks.
5601 */
f44106e2 5602 switch (request->fl_type) {
55725513
TM		 5603 case F_RDLCK:
5604 if (!(filp->f_mode & FMODE_READ))
5605 return -EBADF;
5606 break;
5607 case F_WRLCK:
5608 if (!(filp->f_mode & FMODE_WRITE))
5609 return -EBADF;
5610 }
5611
1da177e4
LT		 5612 do {
5613 status = nfs4_proc_setlk(state, cmd, request);
5614 if ((status != -EAGAIN) || IS_SETLK(cmd))
5615 break;
5616 timeout = nfs4_set_lock_task_retry(timeout);
5617 status = -ERESTARTSYS;
5618 if (signalled())
5619 break;
5620 } while(status < 0);
1da177e4
LT		 5621 return status;
5622}
5623
db4f2e63 5624int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5625{
5626 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5627 int err;
5628
5629 err = nfs4_set_lock_state(state, fl);
5630 if (err != 0)
db4f2e63 5631 return err;
4a706fa0 5632 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5633 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5634}
6b3b5496 5635
cf470c3e
TM		 5636struct nfs_release_lockowner_data {
5637 struct nfs4_lock_state *lsp;
5ae67c4f 5638 struct nfs_server *server;
cf470c3e
TM		 5639 struct nfs_release_lockowner_args args;
5640};
5641
d3c7b7cc
TM		 5642static void nfs4_release_lockowner_release(void *calldata)
5643{
cf470c3e 5644 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5645 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5646 kfree(calldata);
5647}
5648
17280175 5649static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5650 .rpc_release = nfs4_release_lockowner_release,
5651};
5652
c8b2d0bf 5653static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5654{
cf470c3e 5655 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5656 struct rpc_message msg = {
5657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5658 };
5659
5660 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5661 return -EINVAL;
5662 data = kmalloc(sizeof(*data), GFP_NOFS);
5663 if (!data)
5664 return -ENOMEM;
5665 data->lsp = lsp;
5ae67c4f 5666 data->server = server;
cf470c3e
TM		 5667 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5668 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5669 data->args.lock_owner.s_dev = server->s_dev;
5670 msg.rpc_argp = &data->args;
5671 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5672 return 0;
d3c7b7cc
TM		 5673}
5674
aa1870af
BF		 5675#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5676
64c2ce8b
AK		 5677static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5678 const void *buf, size_t buflen,
5679 int flags, int type)
6b3b5496 5680{
64c2ce8b
AK		 5681 if (strcmp(key, "") != 0)
5682 return -EINVAL;
4b580ee3 5683
64c2ce8b 5684 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5685}
5686
64c2ce8b
AK		 5687static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5688 void *buf, size_t buflen, int type)
6b3b5496 5689{
64c2ce8b
AK		 5690 if (strcmp(key, "") != 0)
5691 return -EINVAL;
aa1870af 5692
64c2ce8b 5693 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5694}
5695
64c2ce8b
AK		 5696static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5697 size_t list_len, const char *name,
5698 size_t name_len, int type)
6b3b5496 5699{
64c2ce8b 5700 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5701
096455a2
BF		 5702 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5703 return 0;
64c2ce8b
AK		 5704
5705 if (list && len <= list_len)
5706 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5707 return len;
6b3b5496
BF		 5708}
5709
c9bccef6
DQ		 5710#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5711static inline int nfs4_server_supports_labels(struct nfs_server *server)
5712{
5713 return server->caps & NFS_CAP_SECURITY_LABEL;
5714}
5715
5716static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5717 const void *buf, size_t buflen,
5718 int flags, int type)
5719{
5720 if (security_ismaclabel(key))
5721 return nfs4_set_security_label(dentry, buf, buflen);
5722
5723 return -EOPNOTSUPP;
5724}
5725
5726static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5727 void *buf, size_t buflen, int type)
5728{
5729 if (security_ismaclabel(key))
5730 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5731 return -EOPNOTSUPP;
5732}
5733
5734static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5735 size_t list_len, const char *name,
5736 size_t name_len, int type)
5737{
5738 size_t len = 0;
5739
5740 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5741 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5742 if (list && len <= list_len)
5743 security_inode_listsecurity(dentry->d_inode, list, len);
5744 }
5745 return len;
5746}
5747
5748static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5749 .prefix = XATTR_SECURITY_PREFIX,
5750 .list = nfs4_xattr_list_nfs4_label,
5751 .get = nfs4_xattr_get_nfs4_label,
5752 .set = nfs4_xattr_set_nfs4_label,
5753};
5754#endif
5755
5756
533eb461
AA		 5757/*
5758 * nfs_fhget will use either the mounted_on_fileid or the fileid
5759 */
69aaaae1
TM		 5760static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5761{
533eb461
AA		 5762 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5763 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5764 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5765 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5766 return;
5767
5768 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5769 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5770 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5771 fattr->nlink = 2;
5772}
5773
f05d147f
BS		 5774static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5775 const struct qstr *name,
5776 struct nfs4_fs_locations *fs_locations,
5777 struct page *page)
683b57b4
TM		 5778{
5779 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5780 u32 bitmask[3] = {
361e624f 5781 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5782 };
5783 struct nfs4_fs_locations_arg args = {
5784 .dir_fh = NFS_FH(dir),
c228fd3a 5785 .name = name,
683b57b4
TM		 5786 .page = page,
5787 .bitmask = bitmask,
5788 };
22958463
BH		 5789 struct nfs4_fs_locations_res res = {
5790 .fs_locations = fs_locations,
5791 };
683b57b4
TM		 5792 struct rpc_message msg = {
5793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5794 .rpc_argp = &args,
22958463 5795 .rpc_resp = &res,
683b57b4
TM		 5796 };
5797 int status;
5798
3110ff80 5799 dprintk("%s: start\n", __func__);
533eb461
AA		 5800
5801 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5802 * is not supported */
5803 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5804 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5805 else
5806 bitmask[0] |= FATTR4_WORD0_FILEID;
5807
c228fd3a 5808 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5809 fs_locations->server = server;
830b8e33 5810 fs_locations->nlocations = 0;
f05d147f 5811 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5812 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5813 return status;
5814}
5815
f05d147f
BS		 5816int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5817 const struct qstr *name,
5818 struct nfs4_fs_locations *fs_locations,
5819 struct page *page)
db0a9593
BS		 5820{
5821 struct nfs4_exception exception = { };
5822 int err;
5823 do {
078ea3df
TM		 5824 err = _nfs4_proc_fs_locations(client, dir, name,
5825 fs_locations, page);
5826 trace_nfs4_get_fs_locations(dir, name, err);
5827 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5828 &exception);
5829 } while (exception.retry);
5830 return err;
5831}
5832
5ec16a85
AA		 5833/**
5834 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
5835 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
5836 */
5a5ea0d4
BS		 5837static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5838{
5839 int status;
5840 struct nfs4_secinfo_arg args = {
5841 .dir_fh = NFS_FH(dir),
5842 .name = name,
5843 };
5844 struct nfs4_secinfo_res res = {
5845 .flavors = flavors,
5846 };
5847 struct rpc_message msg = {
5848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5849 .rpc_argp = &args,
5850 .rpc_resp = &res,
5851 };
5ec16a85 5852 struct rpc_clnt *clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5a5ea0d4
BS		 5853
5854 dprintk("NFS call secinfo %s\n", name->name);
5ec16a85 5855 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5a5ea0d4
BS		 5856 dprintk("NFS reply secinfo: %d\n", status);
5857 return status;
5858}
5859
72de53ec
BS		 5860int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5861 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5862{
5863 struct nfs4_exception exception = { };
5864 int err;
5865 do {
078ea3df
TM		 5866 err = _nfs4_proc_secinfo(dir, name, flavors);
5867 trace_nfs4_secinfo(dir, name, err);
5868 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5869 &exception);
5870 } while (exception.retry);
5871 return err;
5872}
5873
557134a3 5874#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5875/*
5876 * Check the exchange flags returned by the server for invalid flags, having
5877 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5878 * DS flags set.
5879 */
5880static int nfs4_check_cl_exchange_flags(u32 flags)
5881{
5882 if (flags & ~EXCHGID4_FLAG_MASK_R)
5883 goto out_inval;
5884 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5885 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5886 goto out_inval;
5887 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5888 goto out_inval;
5889 return NFS_OK;
5890out_inval:
5891 return -NFS4ERR_INVAL;
5892}
5893
78fe0f41 5894static bool
79d4e1f0
CL		 5895nfs41_same_server_scope(struct nfs41_server_scope *a,
5896 struct nfs41_server_scope *b)
78fe0f41
WAA		 5897{
5898 if (a->server_scope_sz == b->server_scope_sz &&
5899 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5900 return true;
5901
5902 return false;
5903}
5904
7c44f1ae
WAA		 5905/*
5906 * nfs4_proc_bind_conn_to_session()
5907 *
5908 * The 4.1 client currently uses the same TCP connection for the
5909 * fore and backchannel.
5910 */
2cf047c9 5911int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5912{
5913 int status;
5914 struct nfs41_bind_conn_to_session_res res;
5915 struct rpc_message msg = {
5916 .rpc_proc =
5917 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5918 .rpc_argp = clp,
5919 .rpc_resp = &res,
2cf047c9 5920 .rpc_cred = cred,
7c44f1ae
WAA		 5921 };
5922
5923 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5924
5925 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5926 if (unlikely(res.session == NULL)) {
5927 status = -ENOMEM;
5928 goto out;
5929 }
5930
5931 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5932 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5933 if (status == 0) {
5934 if (memcmp(res.session->sess_id.data,
5935 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5936 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5937 status = -EIO;
5938 goto out_session;
5939 }
5940 if (res.dir != NFS4_CDFS4_BOTH) {
5941 dprintk("NFS: %s: Unexpected direction from server\n",
5942 __func__);
5943 status = -EIO;
5944 goto out_session;
5945 }
5946 if (res.use_conn_in_rdma_mode) {
5947 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5948 __func__);
5949 status = -EIO;
5950 goto out_session;
5951 }
5952 }
5953out_session:
5954 kfree(res.session);
5955out:
5956 dprintk("<-- %s status= %d\n", __func__, status);
5957 return status;
5958}
5959
99fe60d0
BH		 5960/*
5961 * nfs4_proc_exchange_id()
5962 *
6bbb4ae8
CL		 5963 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5964 *
99fe60d0
BH		 5965 * Since the clientid has expired, all compounds using sessions
5966 * associated with the stale clientid will be returning
5967 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5968 * be in some phase of session reset.
5969 */
4d643d1d 5970int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5971{
5972 nfs4_verifier verifier;
5973 struct nfs41_exchange_id_args args = {
cd93710e 5974 .verifier = &verifier,
99fe60d0 5975 .client = clp,
4f0b429d
TM		 5976 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5977 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5978 };
5979 struct nfs41_exchange_id_res res = {
32b01310 5980 0
99fe60d0
BH		 5981 };
5982 int status;
5983 struct rpc_message msg = {
5984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5985 .rpc_argp = &args,
5986 .rpc_resp = &res,
5987 .rpc_cred = cred,
5988 };
99fe60d0 5989
f092075d 5990 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5991 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5992 sizeof(args.id));
6bbb4ae8
CL		 5993 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5994 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5995 args.id_len, args.id);
99fe60d0 5996
acdeb69d 5997 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5998 GFP_NOFS);
acdeb69d 5999 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6000 status = -ENOMEM;
6001 goto out;
6002 }
78fe0f41 6003
79d4e1f0 6004 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6005 GFP_NOFS);
177313f1 6006 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6007 status = -ENOMEM;
acdeb69d 6008 goto out_server_owner;
abe9a6d5 6009 }
78fe0f41 6010
bbafffd2 6011 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6012 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6013 status = -ENOMEM;
6014 goto out_server_scope;
6015 }
6016
1bd714f2 6017 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6018 trace_nfs4_exchange_id(clp, status);
177313f1 6019 if (status == 0)
32b01310 6020 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6021
acdeb69d 6022 if (status == 0) {
32b01310
TM		 6023 clp->cl_clientid = res.clientid;
6024 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6025 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6026 clp->cl_seqid = res.seqid;
6027
acdeb69d
CL		 6028 kfree(clp->cl_serverowner);
6029 clp->cl_serverowner = res.server_owner;
6030 res.server_owner = NULL;
78fe0f41 6031
7d2ed9ac 6032 /* use the most recent implementation id */
59155546
CL		 6033 kfree(clp->cl_implid);
6034 clp->cl_implid = res.impl_id;
7d2ed9ac 6035
177313f1 6036 if (clp->cl_serverscope != NULL &&
79d4e1f0 6037 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6038 res.server_scope)) {
6039 dprintk("%s: server_scope mismatch detected\n",
6040 __func__);
6041 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6042 kfree(clp->cl_serverscope);
6043 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6044 }
6045
177313f1 6046 if (clp->cl_serverscope == NULL) {
79d4e1f0 6047 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6048 goto out;
6049 }
32b01310
TM		 6050 } else
6051 kfree(res.impl_id);
7d2ed9ac 6052
acdeb69d
CL		 6053out_server_owner:
6054 kfree(res.server_owner);
7d2ed9ac 6055out_server_scope:
abe9a6d5
WAA		 6056 kfree(res.server_scope);
6057out:
177313f1 6058 if (clp->cl_implid != NULL)
6bbb4ae8 6059 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6060 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6061 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6062 clp->cl_implid->date.seconds,
6063 clp->cl_implid->date.nseconds);
6bbb4ae8 6064 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6065 return status;
6066}
6067
66245539
TM		 6068static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6069 struct rpc_cred *cred)
6070{
6071 struct rpc_message msg = {
6072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6073 .rpc_argp = clp,
6074 .rpc_cred = cred,
6075 };
6076 int status;
6077
6078 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6079 trace_nfs4_destroy_clientid(clp, status);
66245539 6080 if (status)
02c67525 6081 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6082 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6083 return status;
6084}
6085
6086static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6087 struct rpc_cred *cred)
6088{
6089 unsigned int loop;
6090 int ret;
6091
6092 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6093 ret = _nfs4_proc_destroy_clientid(clp, cred);
6094 switch (ret) {
6095 case -NFS4ERR_DELAY:
6096 case -NFS4ERR_CLIENTID_BUSY:
6097 ssleep(1);
6098 break;
6099 default:
6100 return ret;
6101 }
6102 }
6103 return 0;
6104}
6105
6106int nfs4_destroy_clientid(struct nfs_client *clp)
6107{
6108 struct rpc_cred *cred;
6109 int ret = 0;
6110
6111 if (clp->cl_mvops->minor_version < 1)
6112 goto out;
6113 if (clp->cl_exchange_flags == 0)
6114 goto out;
05f4c350
CL		 6115 if (clp->cl_preserve_clid)
6116 goto out;
73d8bde5 6117 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6118 ret = nfs4_proc_destroy_clientid(clp, cred);
6119 if (cred)
6120 put_rpccred(cred);
6121 switch (ret) {
6122 case 0:
6123 case -NFS4ERR_STALE_CLIENTID:
6124 clp->cl_exchange_flags = 0;
6125 }
6126out:
6127 return ret;
6128}
6129
2050f0cc
AA		 6130struct nfs4_get_lease_time_data {
6131 struct nfs4_get_lease_time_args *args;
6132 struct nfs4_get_lease_time_res *res;
6133 struct nfs_client *clp;
6134};
6135
6136static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6137 void *calldata)
6138{
2050f0cc
AA		 6139 struct nfs4_get_lease_time_data *data =
6140 (struct nfs4_get_lease_time_data *)calldata;
6141
6142 dprintk("--> %s\n", __func__);
6143 /* just setup sequence, do not trigger session recovery
6144 since we're invoked within one */
d9afbd1b
TM		 6145 nfs41_setup_sequence(data->clp->cl_session,
6146 &data->args->la_seq_args,
6147 &data->res->lr_seq_res,
6148 task);
2050f0cc
AA		 6149 dprintk("<-- %s\n", __func__);
6150}
6151
6152/*
6153 * Called from nfs4_state_manager thread for session setup, so don't recover
6154 * from sequence operation or clientid errors.
6155 */
6156static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6157{
6158 struct nfs4_get_lease_time_data *data =
6159 (struct nfs4_get_lease_time_data *)calldata;
6160
6161 dprintk("--> %s\n", __func__);
14516c3a
TM		 6162 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6163 return;
2050f0cc
AA		 6164 switch (task->tk_status) {
6165 case -NFS4ERR_DELAY:
6166 case -NFS4ERR_GRACE:
6167 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6168 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6169 task->tk_status = 0;
a8a4ae3a
AA		 6170 /* fall through */
6171 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6172 rpc_restart_call_prepare(task);
2050f0cc
AA		 6173 return;
6174 }
2050f0cc
AA		 6175 dprintk("<-- %s\n", __func__);
6176}
6177
17280175 6178static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6179 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6180 .rpc_call_done = nfs4_get_lease_time_done,
6181};
6182
6183int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6184{
6185 struct rpc_task *task;
6186 struct nfs4_get_lease_time_args args;
6187 struct nfs4_get_lease_time_res res = {
6188 .lr_fsinfo = fsinfo,
6189 };
6190 struct nfs4_get_lease_time_data data = {
6191 .args = &args,
6192 .res = &res,
6193 .clp = clp,
6194 };
6195 struct rpc_message msg = {
6196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6197 .rpc_argp = &args,
6198 .rpc_resp = &res,
6199 };
6200 struct rpc_task_setup task_setup = {
6201 .rpc_client = clp->cl_rpcclient,
6202 .rpc_message = &msg,
6203 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6204 .callback_data = &data,
6205 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6206 };
6207 int status;
6208
9d12b216 6209 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6210 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6211 dprintk("--> %s\n", __func__);
6212 task = rpc_run_task(&task_setup);
6213
6214 if (IS_ERR(task))
6215 status = PTR_ERR(task);
6216 else {
6217 status = task->tk_status;
6218 rpc_put_task(task);
6219 }
6220 dprintk("<-- %s return %d\n", __func__, status);
6221
6222 return status;
6223}
6224
fc931582
AA		 6225/*
6226 * Initialize the values to be used by the client in CREATE_SESSION
6227 * If nfs4_init_session set the fore channel request and response sizes,
6228 * use them.
6229 *
6230 * Set the back channel max_resp_sz_cached to zero to force the client to
6231 * always set csa_cachethis to FALSE because the current implementation
6232 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6233 */
6234static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6235{
18aad3d5
AA		 6236 unsigned int max_rqst_sz, max_resp_sz;
6237
6238 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6239 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6240
fc931582 6241 /* Fore channel attributes */
18aad3d5
AA		 6242 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6243 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6244 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6245 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6246
6247 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6248 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6249 __func__,
6250 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6251 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6252
6253 /* Back channel attributes */
fc931582
AA		 6254 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6255 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6256 args->bc_attrs.max_resp_sz_cached = 0;
6257 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6258 args->bc_attrs.max_reqs = 1;
6259
6260 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6261 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6262 __func__,
6263 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6264 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6265 args->bc_attrs.max_reqs);
6266}
6267
43c2e885 6268static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6269{
43c2e885
BF		 6270 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6271 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6272
43c2e885
BF		 6273 if (rcvd->max_resp_sz > sent->max_resp_sz)
6274 return -EINVAL;
6275 /*
6276 * Our requested max_ops is the minimum we need; we're not
6277 * prepared to break up compounds into smaller pieces than that.
6278 * So, no point even trying to continue if the server won't
6279 * cooperate:
6280 */
6281 if (rcvd->max_ops < sent->max_ops)
6282 return -EINVAL;
6283 if (rcvd->max_reqs == 0)
6284 return -EINVAL;
b4b9a0c1
VG		 6285 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6286 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6287 return 0;
8d35301d
AA		 6288}
6289
43c2e885
BF		 6290static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6291{
6292 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6293 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6294
43c2e885
BF		 6295 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6296 return -EINVAL;
6297 if (rcvd->max_resp_sz < sent->max_resp_sz)
6298 return -EINVAL;
6299 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6300 return -EINVAL;
6301 /* These would render the backchannel useless: */
b4b9a0c1 6302 if (rcvd->max_ops != sent->max_ops)
43c2e885 6303 return -EINVAL;
b4b9a0c1 6304 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6305 return -EINVAL;
6306 return 0;
6307}
8d35301d 6308
8d35301d
AA		 6309static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6310 struct nfs4_session *session)
6311{
43c2e885 6312 int ret;
8d35301d 6313
43c2e885
BF		 6314 ret = nfs4_verify_fore_channel_attrs(args, session);
6315 if (ret)
6316 return ret;
6317 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6318}
6319
848f5bda
TM		 6320static int _nfs4_proc_create_session(struct nfs_client *clp,
6321 struct rpc_cred *cred)
fc931582
AA		 6322{
6323 struct nfs4_session *session = clp->cl_session;
6324 struct nfs41_create_session_args args = {
6325 .client = clp,
6326 .cb_program = NFS4_CALLBACK,
6327 };
6328 struct nfs41_create_session_res res = {
6329 .client = clp,
6330 };
6331 struct rpc_message msg = {
6332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6333 .rpc_argp = &args,
6334 .rpc_resp = &res,
848f5bda 6335 .rpc_cred = cred,
fc931582
AA		 6336 };
6337 int status;
6338
6339 nfs4_init_channel_attrs(&args);
0f91421e 6340 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6341
1bd714f2 6342 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6343 trace_nfs4_create_session(clp, status);
fc931582 6344
43095d39 6345 if (!status) {
8d35301d
AA		 6346 /* Verify the session's negotiated channel_attrs values */
6347 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6348 /* Increment the clientid slot sequence id */
6349 clp->cl_seqid++;
6350 }
6351
6352 return status;
6353}
6354
6355/*
6356 * Issues a CREATE_SESSION operation to the server.
6357 * It is the responsibility of the caller to verify the session is
6358 * expired before calling this routine.
6359 */
848f5bda 6360int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6361{
6362 int status;
6363 unsigned *ptr;
fc931582
AA		 6364 struct nfs4_session *session = clp->cl_session;
6365
6366 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6367
848f5bda 6368 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6369 if (status)
6370 goto out;
6371
aacd5537
AA		 6372 /* Init or reset the session slot tables */
6373 status = nfs4_setup_session_slot_tables(session);
6374 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6375 if (status)
6376 goto out;
6377
6378 ptr = (unsigned *)&session->sess_id.data[0];
6379 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6380 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6381out:
6382 dprintk("<-- %s\n", __func__);
6383 return status;
6384}
6385
0f3e66c6
AA		 6386/*
6387 * Issue the over-the-wire RPC DESTROY_SESSION.
6388 * The caller must serialize access to this routine.
6389 */
848f5bda
TM		 6390int nfs4_proc_destroy_session(struct nfs4_session *session,
6391 struct rpc_cred *cred)
0f3e66c6 6392{
848f5bda
TM		 6393 struct rpc_message msg = {
6394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6395 .rpc_argp = session,
6396 .rpc_cred = cred,
6397 };
0f3e66c6 6398 int status = 0;
0f3e66c6
AA		 6399
6400 dprintk("--> nfs4_proc_destroy_session\n");
6401
6402 /* session is still being setup */
6403 if (session->clp->cl_cons_state != NFS_CS_READY)
6404 return status;
6405
1bd714f2 6406 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6407 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6408
6409 if (status)
08106ac7 6410 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6411 "Session has been destroyed regardless...\n", status);
6412
6413 dprintk("<-- nfs4_proc_destroy_session\n");
6414 return status;
6415}
6416
fc01cea9
AA		 6417/*
6418 * Renew the cl_session lease.
6419 */
d5f8d3fe
TM		 6420struct nfs4_sequence_data {
6421 struct nfs_client *clp;
6422 struct nfs4_sequence_args args;
6423 struct nfs4_sequence_res res;
6424};
6425
dc96aef9
AB		 6426static void nfs41_sequence_release(void *data)
6427{
d5f8d3fe
TM		 6428 struct nfs4_sequence_data *calldata = data;
6429 struct nfs_client *clp = calldata->clp;
dc96aef9 6430
7135840f
AB		 6431 if (atomic_read(&clp->cl_count) > 1)
6432 nfs4_schedule_state_renewal(clp);
6433 nfs_put_client(clp);
d5f8d3fe 6434 kfree(calldata);
dc96aef9
AB		 6435}
6436
aa5190d0
TM		 6437static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6438{
6439 switch(task->tk_status) {
6440 case -NFS4ERR_DELAY:
aa5190d0
TM		 6441 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6442 return -EAGAIN;
6443 default:
0400a6b0 6444 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6445 }
6446 return 0;
6447}
6448
dc96aef9 6449static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6450{
d5f8d3fe
TM		 6451 struct nfs4_sequence_data *calldata = data;
6452 struct nfs_client *clp = calldata->clp;
fc01cea9 6453
14516c3a
TM		 6454 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6455 return;
fc01cea9 6456
c6d01c6f 6457 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6458 if (task->tk_status < 0) {
6459 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6460 if (atomic_read(&clp->cl_count) == 1)
6461 goto out;
fc01cea9 6462
aa5190d0
TM		 6463 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6464 rpc_restart_call_prepare(task);
fc01cea9
AA		 6465 return;
6466 }
6467 }
fc01cea9 6468 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6469out:
fc01cea9
AA		 6470 dprintk("<-- %s\n", __func__);
6471}
6472
6473static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6474{
d5f8d3fe
TM		 6475 struct nfs4_sequence_data *calldata = data;
6476 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6477 struct nfs4_sequence_args *args;
6478 struct nfs4_sequence_res *res;
6479
fc01cea9
AA		 6480 args = task->tk_msg.rpc_argp;
6481 res = task->tk_msg.rpc_resp;
6482
d9afbd1b 6483 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6484}
6485
6486static const struct rpc_call_ops nfs41_sequence_ops = {
6487 .rpc_call_done = nfs41_sequence_call_done,
6488 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6489 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6490};
6491
8fe72bac
TM		 6492static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6493 struct rpc_cred *cred,
6494 bool is_privileged)
fc01cea9 6495{
d5f8d3fe 6496 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6497 struct rpc_message msg = {
6498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6499 .rpc_cred = cred,
6500 };
71ac6da9
TM		 6501 struct rpc_task_setup task_setup_data = {
6502 .rpc_client = clp->cl_rpcclient,
6503 .rpc_message = &msg,
8fe72bac 6504 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6505 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6506 };
fc01cea9 6507
7135840f 6508 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6509 return ERR_PTR(-EIO);
dfb4f309 6510 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6511 if (calldata == NULL) {
7135840f 6512 nfs_put_client(clp);
71ac6da9 6513 return ERR_PTR(-ENOMEM);
fc01cea9 6514 }
9d12b216 6515 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6516 if (is_privileged)
6517 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6518 msg.rpc_argp = &calldata->args;
6519 msg.rpc_resp = &calldata->res;
6520 calldata->clp = clp;
71ac6da9 6521 task_setup_data.callback_data = calldata;
fc01cea9 6522
71ac6da9
TM		 6523 return rpc_run_task(&task_setup_data);
6524}
6525
2f60ea6b 6526static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6527{
6528 struct rpc_task *task;
6529 int ret = 0;
6530
2f60ea6b
TM		 6531 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6532 return 0;
8fe72bac 6533 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6534 if (IS_ERR(task))
6535 ret = PTR_ERR(task);
6536 else
bf294b41 6537 rpc_put_task_async(task);
71ac6da9
TM		 6538 dprintk("<-- %s status=%d\n", __func__, ret);
6539 return ret;
6540}
6541
6542static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6543{
6544 struct rpc_task *task;
6545 int ret;
6546
8fe72bac 6547 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6548 if (IS_ERR(task)) {
6549 ret = PTR_ERR(task);
6550 goto out;
6551 }
6552 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6553 if (!ret) {
6554 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6555
6556 if (task->tk_status == 0)
6557 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6558 ret = task->tk_status;
b4410c2f 6559 }
71ac6da9
TM		 6560 rpc_put_task(task);
6561out:
6562 dprintk("<-- %s status=%d\n", __func__, ret);
6563 return ret;
fc01cea9
AA		 6564}
6565
fce5c838
RL		 6566struct nfs4_reclaim_complete_data {
6567 struct nfs_client *clp;
6568 struct nfs41_reclaim_complete_args arg;
6569 struct nfs41_reclaim_complete_res res;
6570};
6571
6572static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6573{
6574 struct nfs4_reclaim_complete_data *calldata = data;
6575
d9afbd1b
TM		 6576 nfs41_setup_sequence(calldata->clp->cl_session,
6577 &calldata->arg.seq_args,
6578 &calldata->res.seq_res,
6579 task);
fce5c838
RL		 6580}
6581
aa5190d0
TM		 6582static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6583{
6584 switch(task->tk_status) {
6585 case 0:
6586 case -NFS4ERR_COMPLETE_ALREADY:
6587 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6588 break;
6589 case -NFS4ERR_DELAY:
aa5190d0 6590 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6591 /* fall through */
6592 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6593 return -EAGAIN;
6594 default:
0400a6b0 6595 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6596 }
6597 return 0;
6598}
6599
fce5c838
RL		 6600static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6601{
6602 struct nfs4_reclaim_complete_data *calldata = data;
6603 struct nfs_client *clp = calldata->clp;
6604 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6605
6606 dprintk("--> %s\n", __func__);
14516c3a
TM		 6607 if (!nfs41_sequence_done(task, res))
6608 return;
fce5c838 6609
c6d01c6f 6610 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6611 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6612 rpc_restart_call_prepare(task);
6613 return;
6614 }
fce5c838
RL		 6615 dprintk("<-- %s\n", __func__);
6616}
6617
6618static void nfs4_free_reclaim_complete_data(void *data)
6619{
6620 struct nfs4_reclaim_complete_data *calldata = data;
6621
6622 kfree(calldata);
6623}
6624
6625static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6626 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6627 .rpc_call_done = nfs4_reclaim_complete_done,
6628 .rpc_release = nfs4_free_reclaim_complete_data,
6629};
6630
6631/*
6632 * Issue a global reclaim complete.
6633 */
965e9c23
TM		 6634static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6635 struct rpc_cred *cred)
fce5c838
RL		 6636{
6637 struct nfs4_reclaim_complete_data *calldata;
6638 struct rpc_task *task;
6639 struct rpc_message msg = {
6640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6641 .rpc_cred = cred,
fce5c838
RL		 6642 };
6643 struct rpc_task_setup task_setup_data = {
6644 .rpc_client = clp->cl_rpcclient,
6645 .rpc_message = &msg,
6646 .callback_ops = &nfs4_reclaim_complete_call_ops,
6647 .flags = RPC_TASK_ASYNC,
6648 };
6649 int status = -ENOMEM;
6650
6651 dprintk("--> %s\n", __func__);
8535b2be 6652 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6653 if (calldata == NULL)
6654 goto out;
6655 calldata->clp = clp;
6656 calldata->arg.one_fs = 0;
fce5c838 6657
9d12b216 6658 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6659 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6660 msg.rpc_argp = &calldata->arg;
6661 msg.rpc_resp = &calldata->res;
6662 task_setup_data.callback_data = calldata;
6663 task = rpc_run_task(&task_setup_data);
acf82b85 6664 if (IS_ERR(task)) {
fce5c838 6665 status = PTR_ERR(task);
acf82b85
DC		 6666 goto out;
6667 }
c34c32ea
AA		 6668 status = nfs4_wait_for_completion_rpc_task(task);
6669 if (status == 0)
6670 status = task->tk_status;
fce5c838 6671 rpc_put_task(task);
acf82b85 6672 return 0;
fce5c838
RL		 6673out:
6674 dprintk("<-- %s status=%d\n", __func__, status);
6675 return status;
6676}
b1f69b75
AA		 6677
6678static void
6679nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6680{
6681 struct nfs4_layoutget *lgp = calldata;
c31663d4 6682 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6683 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6684
6685 dprintk("--> %s\n", __func__);
c31663d4
FI		 6686 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6687 * right now covering the LAYOUTGET we are about to send.
6688 * However, that is not so catastrophic, and there seems
6689 * to be no way to prevent it completely.
6690 */
6ba7db34 6691 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6692 &lgp->res.seq_res, task))
b1f69b75 6693 return;
cf7d63f1
FI		 6694 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6695 NFS_I(lgp->args.inode)->layout,
6696 lgp->args.ctx->state)) {
6697 rpc_exit(task, NFS4_OK);
cf7d63f1 6698 }
b1f69b75
AA		 6699}
6700
6701static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6702{
6703 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6704 struct inode *inode = lgp->args.inode;
6705 struct nfs_server *server = NFS_SERVER(inode);
6706 struct pnfs_layout_hdr *lo;
6707 struct nfs4_state *state = NULL;
30005121 6708 unsigned long timeo, giveup;
b1f69b75
AA		 6709
6710 dprintk("--> %s\n", __func__);
6711
6ba7db34 6712 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6713 goto out;
b1f69b75
AA		 6714
6715 switch (task->tk_status) {
6716 case 0:
ee314c2a 6717 goto out;
b1f69b75
AA		 6718 case -NFS4ERR_LAYOUTTRYLATER:
6719 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6720 timeo = rpc_get_timeout(task->tk_client);
6721 giveup = lgp->args.timestamp + timeo;
6722 if (time_after(giveup, jiffies))
6723 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6724 break;
6725 case -NFS4ERR_EXPIRED:
6726 case -NFS4ERR_BAD_STATEID:
6727 spin_lock(&inode->i_lock);
6728 lo = NFS_I(inode)->layout;
6729 if (!lo || list_empty(&lo->plh_segs)) {
6730 spin_unlock(&inode->i_lock);
6731 /* If the open stateid was bad, then recover it. */
6732 state = lgp->args.ctx->state;
6733 } else {
6734 LIST_HEAD(head);
6735
6736 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6737 spin_unlock(&inode->i_lock);
6738 /* Mark the bad layout state as invalid, then
6739 * retry using the open stateid. */
6740 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6741 }
6742 }
ee314c2a
TM		 6743 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6744 rpc_restart_call_prepare(task);
6745out:
b1f69b75
AA		 6746 dprintk("<-- %s\n", __func__);
6747}
6748
8554116e
IK		 6749static size_t max_response_pages(struct nfs_server *server)
6750{
6751 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6752 return nfs_page_array_len(0, max_resp_sz);
6753}
6754
6755static void nfs4_free_pages(struct page **pages, size_t size)
6756{
6757 int i;
6758
6759 if (!pages)
6760 return;
6761
6762 for (i = 0; i < size; i++) {
6763 if (!pages[i])
6764 break;
6765 __free_page(pages[i]);
6766 }
6767 kfree(pages);
6768}
6769
6770static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6771{
6772 struct page **pages;
6773 int i;
6774
6775 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6776 if (!pages) {
6777 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6778 return NULL;
6779 }
6780
6781 for (i = 0; i < size; i++) {
6782 pages[i] = alloc_page(gfp_flags);
6783 if (!pages[i]) {
6784 dprintk("%s: failed to allocate page\n", __func__);
6785 nfs4_free_pages(pages, size);
6786 return NULL;
6787 }
6788 }
6789
6790 return pages;
6791}
6792
b1f69b75
AA		 6793static void nfs4_layoutget_release(void *calldata)
6794{
6795 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6796 struct inode *inode = lgp->args.inode;
6797 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6798 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6799
6800 dprintk("--> %s\n", __func__);
8554116e 6801 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6802 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6803 put_nfs_open_context(lgp->args.ctx);
6804 kfree(calldata);
6805 dprintk("<-- %s\n", __func__);
6806}
6807
6808static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6809 .rpc_call_prepare = nfs4_layoutget_prepare,
6810 .rpc_call_done = nfs4_layoutget_done,
6811 .rpc_release = nfs4_layoutget_release,
6812};
6813
a0b0a6e3
TM		 6814struct pnfs_layout_segment *
6815nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6816{
a47970ff
WAA		 6817 struct inode *inode = lgp->args.inode;
6818 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6819 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6820 struct rpc_task *task;
6821 struct rpc_message msg = {
6822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6823 .rpc_argp = &lgp->args,
6824 .rpc_resp = &lgp->res,
6ab59344 6825 .rpc_cred = lgp->cred,
b1f69b75
AA		 6826 };
6827 struct rpc_task_setup task_setup_data = {
6828 .rpc_client = server->client,
6829 .rpc_message = &msg,
6830 .callback_ops = &nfs4_layoutget_call_ops,
6831 .callback_data = lgp,
6832 .flags = RPC_TASK_ASYNC,
6833 };
a0b0a6e3 6834 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6835 int status = 0;
6836
6837 dprintk("--> %s\n", __func__);
6838
8554116e
IK		 6839 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6840 if (!lgp->args.layout.pages) {
6841 nfs4_layoutget_release(lgp);
a0b0a6e3 6842 return ERR_PTR(-ENOMEM);
8554116e
IK		 6843 }
6844 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6845 lgp->args.timestamp = jiffies;
8554116e 6846
35124a09 6847 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6848 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6849 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6850
6851 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6852 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6853
b1f69b75
AA		 6854 task = rpc_run_task(&task_setup_data);
6855 if (IS_ERR(task))
a0b0a6e3 6856 return ERR_CAST(task);
b1f69b75 6857 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6858 if (status == 0)
6859 status = task->tk_status;
085b7a45
WAA		 6860 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6861 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6862 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6863 rpc_put_task(task);
6864 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6865 if (status)
6866 return ERR_PTR(status);
6867 return lseg;
b1f69b75
AA		 6868}
6869
cbe82603
BH		 6870static void
6871nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6872{
6873 struct nfs4_layoutreturn *lrp = calldata;
6874
6875 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6876 nfs41_setup_sequence(lrp->clp->cl_session,
6877 &lrp->args.seq_args,
6878 &lrp->res.seq_res,
6879 task);
cbe82603
BH		 6880}
6881
6882static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6883{
6884 struct nfs4_layoutreturn *lrp = calldata;
6885 struct nfs_server *server;
6886
6887 dprintk("--> %s\n", __func__);
6888
6ba7db34 6889 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6890 return;
6891
6892 server = NFS_SERVER(lrp->args.inode);
6893 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6894 rpc_restart_call_prepare(task);
cbe82603
BH		 6895 return;
6896 }
cbe82603
BH		 6897 dprintk("<-- %s\n", __func__);
6898}
6899
6900static void nfs4_layoutreturn_release(void *calldata)
6901{
6902 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6903 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6904
6905 dprintk("--> %s\n", __func__);
849b286f
TM		 6906 spin_lock(&lo->plh_inode->i_lock);
6907 if (lrp->res.lrs_present)
6908 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6909 lo->plh_block_lgets--;
6910 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6911 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6912 kfree(calldata);
6913 dprintk("<-- %s\n", __func__);
6914}
6915
6916static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6917 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6918 .rpc_call_done = nfs4_layoutreturn_done,
6919 .rpc_release = nfs4_layoutreturn_release,
6920};
6921
6922int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6923{
6924 struct rpc_task *task;
6925 struct rpc_message msg = {
6926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6927 .rpc_argp = &lrp->args,
6928 .rpc_resp = &lrp->res,
9556000d 6929 .rpc_cred = lrp->cred,
cbe82603
BH		 6930 };
6931 struct rpc_task_setup task_setup_data = {
1771c577 6932 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6933 .rpc_message = &msg,
6934 .callback_ops = &nfs4_layoutreturn_call_ops,
6935 .callback_data = lrp,
6936 };
6937 int status;
6938
6939 dprintk("--> %s\n", __func__);
9d12b216 6940 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6941 task = rpc_run_task(&task_setup_data);
6942 if (IS_ERR(task))
6943 return PTR_ERR(task);
6944 status = task->tk_status;
6945 dprintk("<-- %s status=%d\n", __func__, status);
6946 rpc_put_task(task);
6947 return status;
6948}
6949
7f11d8d3
AA		 6950/*
6951 * Retrieve the list of Data Server devices from the MDS.
6952 */
6953static int _nfs4_getdevicelist(struct nfs_server *server,
6954 const struct nfs_fh *fh,
6955 struct pnfs_devicelist *devlist)
6956{
6957 struct nfs4_getdevicelist_args args = {
6958 .fh = fh,
6959 .layoutclass = server->pnfs_curr_ld->id,
6960 };
6961 struct nfs4_getdevicelist_res res = {
6962 .devlist = devlist,
6963 };
6964 struct rpc_message msg = {
6965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6966 .rpc_argp = &args,
6967 .rpc_resp = &res,
6968 };
6969 int status;
6970
6971 dprintk("--> %s\n", __func__);
6972 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6973 &res.seq_res, 0);
6974 dprintk("<-- %s status=%d\n", __func__, status);
6975 return status;
6976}
6977
6978int nfs4_proc_getdevicelist(struct nfs_server *server,
6979 const struct nfs_fh *fh,
6980 struct pnfs_devicelist *devlist)
6981{
6982 struct nfs4_exception exception = { };
6983 int err;
6984
6985 do {
6986 err = nfs4_handle_exception(server,
6987 _nfs4_getdevicelist(server, fh, devlist),
6988 &exception);
6989 } while (exception.retry);
6990
6991 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6992 err, devlist->num_devs);
6993
6994 return err;
6995}
6996EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6997
b1f69b75 6998static int
cd5875fe
TM		 6999_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7000 struct pnfs_device *pdev,
7001 struct rpc_cred *cred)
b1f69b75
AA		 7002{
7003 struct nfs4_getdeviceinfo_args args = {
7004 .pdev = pdev,
7005 };
7006 struct nfs4_getdeviceinfo_res res = {
7007 .pdev = pdev,
7008 };
7009 struct rpc_message msg = {
7010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7011 .rpc_argp = &args,
7012 .rpc_resp = &res,
cd5875fe 7013 .rpc_cred = cred,
b1f69b75
AA		 7014 };
7015 int status;
7016
7017 dprintk("--> %s\n", __func__);
7c513058 7018 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7019 dprintk("<-- %s status=%d\n", __func__, status);
7020
7021 return status;
7022}
7023
cd5875fe
TM		 7024int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7025 struct pnfs_device *pdev,
7026 struct rpc_cred *cred)
b1f69b75
AA		 7027{
7028 struct nfs4_exception exception = { };
7029 int err;
7030
7031 do {
7032 err = nfs4_handle_exception(server,
cd5875fe 7033 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7034 &exception);
7035 } while (exception.retry);
7036 return err;
7037}
7038EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7039
863a3c6c
AA		 7040static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7041{
7042 struct nfs4_layoutcommit_data *data = calldata;
7043 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7044 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7045
d9afbd1b
TM		 7046 nfs41_setup_sequence(session,
7047 &data->args.seq_args,
7048 &data->res.seq_res,
7049 task);
863a3c6c
AA		 7050}
7051
7052static void
7053nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7054{
7055 struct nfs4_layoutcommit_data *data = calldata;
7056 struct nfs_server *server = NFS_SERVER(data->args.inode);
7057
6ba7db34 7058 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7059 return;
7060
7061 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7062 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7063 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7064 case -NFS4ERR_BADLAYOUT: /* no layout */
7065 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7066 task->tk_status = 0;
e59d27e0
TM		 7067 break;
7068 case 0:
863a3c6c
AA		 7069 nfs_post_op_update_inode_force_wcc(data->args.inode,
7070 data->res.fattr);
e59d27e0
TM		 7071 break;
7072 default:
7073 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7074 rpc_restart_call_prepare(task);
7075 return;
7076 }
7077 }
863a3c6c
AA		 7078}
7079
7080static void nfs4_layoutcommit_release(void *calldata)
7081{
7082 struct nfs4_layoutcommit_data *data = calldata;
7083
db29c089 7084 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7085 put_rpccred(data->cred);
7086 kfree(data);
7087}
7088
7089static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7090 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7091 .rpc_call_done = nfs4_layoutcommit_done,
7092 .rpc_release = nfs4_layoutcommit_release,
7093};
7094
7095int
ef311537 7096nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7097{
7098 struct rpc_message msg = {
7099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7100 .rpc_argp = &data->args,
7101 .rpc_resp = &data->res,
7102 .rpc_cred = data->cred,
7103 };
7104 struct rpc_task_setup task_setup_data = {
7105 .task = &data->task,
7106 .rpc_client = NFS_CLIENT(data->args.inode),
7107 .rpc_message = &msg,
7108 .callback_ops = &nfs4_layoutcommit_ops,
7109 .callback_data = data,
7110 .flags = RPC_TASK_ASYNC,
7111 };
7112 struct rpc_task *task;
7113 int status = 0;
7114
7115 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7116 "lbw: %llu inode %lu\n",
7117 data->task.tk_pid, sync,
7118 data->args.lastbytewritten,
7119 data->args.inode->i_ino);
7120
9d12b216 7121 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7122 task = rpc_run_task(&task_setup_data);
7123 if (IS_ERR(task))
7124 return PTR_ERR(task);
ef311537 7125 if (sync == false)
863a3c6c
AA		 7126 goto out;
7127 status = nfs4_wait_for_completion_rpc_task(task);
7128 if (status != 0)
7129 goto out;
7130 status = task->tk_status;
7131out:
7132 dprintk("%s: status %d\n", __func__, status);
7133 rpc_put_task(task);
7134 return status;
7135}
fca78d6d 7136
97431204
AA		 7137/**
7138 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7139 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7140 */
fca78d6d
BS		 7141static int
7142_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7143 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7144{
7145 struct nfs41_secinfo_no_name_args args = {
7146 .style = SECINFO_STYLE_CURRENT_FH,
7147 };
7148 struct nfs4_secinfo_res res = {
7149 .flavors = flavors,
7150 };
7151 struct rpc_message msg = {
7152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7153 .rpc_argp = &args,
7154 .rpc_resp = &res,
7155 };
97431204
AA		 7156 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7157 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7158}
7159
7160static int
7161nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7162 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7163{
7164 struct nfs4_exception exception = { };
7165 int err;
7166 do {
7167 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7168 switch (err) {
7169 case 0:
7170 case -NFS4ERR_WRONGSEC:
7171 case -NFS4ERR_NOTSUPP:
05e9cfb4 7172 goto out;
fca78d6d
BS		 7173 default:
7174 err = nfs4_handle_exception(server, err, &exception);
7175 }
7176 } while (exception.retry);
05e9cfb4 7177out:
fca78d6d
BS		 7178 return err;
7179}
7180
7181static int
7182nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7183 struct nfs_fsinfo *info)
7184{
7185 int err;
7186 struct page *page;
7187 rpc_authflavor_t flavor;
7188 struct nfs4_secinfo_flavors *flavors;
7189
7190 page = alloc_page(GFP_KERNEL);
7191 if (!page) {
7192 err = -ENOMEM;
7193 goto out;
7194 }
7195
7196 flavors = page_address(page);
7197 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7198
7199 /*
7200 * Fall back on "guess and check" method if
7201 * the server doesn't support SECINFO_NO_NAME
7202 */
7203 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7204 err = nfs4_find_root_sec(server, fhandle, info);
7205 goto out_freepage;
7206 }
7207 if (err)
7208 goto out_freepage;
7209
7210 flavor = nfs_find_best_sec(flavors);
7211 if (err == 0)
7212 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7213
7214out_freepage:
7215 put_page(page);
7216 if (err == -EACCES)
7217 return -EPERM;
7218out:
7219 return err;
7220}
1cab0652 7221
ab7cb0df
TM		 7222static int _nfs41_test_stateid(struct nfs_server *server,
7223 nfs4_stateid *stateid,
7224 struct rpc_cred *cred)
7d974794
BS		 7225{
7226 int status;
7227 struct nfs41_test_stateid_args args = {
1cab0652 7228 .stateid = stateid,
7d974794
BS		 7229 };
7230 struct nfs41_test_stateid_res res;
7231 struct rpc_message msg = {
7232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7233 .rpc_argp = &args,
7234 .rpc_resp = &res,
ab7cb0df 7235 .rpc_cred = cred,
7d974794 7236 };
1cab0652 7237
38527b15 7238 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7239 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7240 nfs4_set_sequence_privileged(&args.seq_args);
7241 status = nfs4_call_sync_sequence(server->client, server, &msg,
7242 &args.seq_args, &res.seq_res);
38527b15
CL		 7243 if (status != NFS_OK) {
7244 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7245 return status;
38527b15
CL		 7246 }
7247 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7248 return -res.status;
7d974794
BS		 7249}
7250
38527b15
CL		 7251/**
7252 * nfs41_test_stateid - perform a TEST_STATEID operation
7253 *
7254 * @server: server / transport on which to perform the operation
7255 * @stateid: state ID to test
ab7cb0df 7256 * @cred: credential
38527b15
CL		 7257 *
7258 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7259 * Otherwise a negative NFS4ERR value is returned if the operation
7260 * failed or the state ID is not currently valid.
7261 */
ab7cb0df
TM		 7262static int nfs41_test_stateid(struct nfs_server *server,
7263 nfs4_stateid *stateid,
7264 struct rpc_cred *cred)
7d974794
BS		 7265{
7266 struct nfs4_exception exception = { };
7267 int err;
7268 do {
ab7cb0df 7269 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7270 if (err != -NFS4ERR_DELAY)
7271 break;
7272 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7273 } while (exception.retry);
7274 return err;
7275}
9aeda35f 7276
7c1d5fae
TM		 7277struct nfs_free_stateid_data {
7278 struct nfs_server *server;
7279 struct nfs41_free_stateid_args args;
9aeda35f 7280 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7281};
7282
7283static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7284{
7285 struct nfs_free_stateid_data *data = calldata;
7286 nfs41_setup_sequence(nfs4_get_session(data->server),
7287 &data->args.seq_args,
7288 &data->res.seq_res,
7289 task);
7290}
7291
7292static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7293{
7294 struct nfs_free_stateid_data *data = calldata;
7295
7296 nfs41_sequence_done(task, &data->res.seq_res);
7297
7298 switch (task->tk_status) {
7299 case -NFS4ERR_DELAY:
7300 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7301 rpc_restart_call_prepare(task);
7302 }
7303}
7304
7305static void nfs41_free_stateid_release(void *calldata)
7306{
7307 kfree(calldata);
7308}
7309
17f26b12 7310static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7311 .rpc_call_prepare = nfs41_free_stateid_prepare,
7312 .rpc_call_done = nfs41_free_stateid_done,
7313 .rpc_release = nfs41_free_stateid_release,
7314};
7315
7316static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7317 nfs4_stateid *stateid,
ab7cb0df 7318 struct rpc_cred *cred,
7c1d5fae
TM		 7319 bool privileged)
7320{
9aeda35f
BS		 7321 struct rpc_message msg = {
7322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7323 .rpc_cred = cred,
9aeda35f 7324 };
7c1d5fae
TM		 7325 struct rpc_task_setup task_setup = {
7326 .rpc_client = server->client,
7327 .rpc_message = &msg,
7328 .callback_ops = &nfs41_free_stateid_ops,
7329 .flags = RPC_TASK_ASYNC,
7330 };
7331 struct nfs_free_stateid_data *data;
9aeda35f 7332
38527b15 7333 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7334 data = kmalloc(sizeof(*data), GFP_NOFS);
7335 if (!data)
7336 return ERR_PTR(-ENOMEM);
7337 data->server = server;
7338 nfs4_stateid_copy(&data->args.stateid, stateid);
7339
7340 task_setup.callback_data = data;
7341
7342 msg.rpc_argp = &data->args;
7343 msg.rpc_resp = &data->res;
7344 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7345 if (privileged)
7346 nfs4_set_sequence_privileged(&data->args.seq_args);
7347
7348 return rpc_run_task(&task_setup);
9aeda35f
BS		 7349}
7350
38527b15
CL		 7351/**
7352 * nfs41_free_stateid - perform a FREE_STATEID operation
7353 *
7354 * @server: server / transport on which to perform the operation
7355 * @stateid: state ID to release
ab7cb0df 7356 * @cred: credential
38527b15
CL		 7357 *
7358 * Returns NFS_OK if the server freed "stateid". Otherwise a
7359 * negative NFS4ERR value is returned.
7360 */
ab7cb0df
TM		 7361static int nfs41_free_stateid(struct nfs_server *server,
7362 nfs4_stateid *stateid,
7363 struct rpc_cred *cred)
9aeda35f 7364{
7c1d5fae
TM		 7365 struct rpc_task *task;
7366 int ret;
7367
ab7cb0df 7368 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7369 if (IS_ERR(task))
7370 return PTR_ERR(task);
7371 ret = rpc_wait_for_completion_task(task);
7372 if (!ret)
7373 ret = task->tk_status;
7374 rpc_put_task(task);
7375 return ret;
9aeda35f 7376}
36281caa 7377
c8b2d0bf
TM		 7378static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7379{
7380 struct rpc_task *task;
ab7cb0df 7381 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7382
ab7cb0df 7383 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7384 nfs4_free_lock_state(server, lsp);
7385 if (IS_ERR(task))
7386 return PTR_ERR(task);
7387 rpc_put_task(task);
7388 return 0;
7389}
7390
36281caa
TM		 7391static bool nfs41_match_stateid(const nfs4_stateid *s1,
7392 const nfs4_stateid *s2)
7393{
2d2f24ad 7394 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7395 return false;
7396
2d2f24ad 7397 if (s1->seqid == s2->seqid)
36281caa 7398 return true;
2d2f24ad 7399 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7400 return true;
7401
7402 return false;
7403}
7404
557134a3
AA		 7405#endif /* CONFIG_NFS_V4_1 */
7406
36281caa
TM		 7407static bool nfs4_match_stateid(const nfs4_stateid *s1,
7408 const nfs4_stateid *s2)
7409{
f597c537 7410 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7411}
7412
7413
17280175 7414static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7415 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7416 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7417 .recover_open = nfs4_open_reclaim,
7418 .recover_lock = nfs4_lock_reclaim,
591d71cb 7419 .establish_clid = nfs4_init_clientid,
05f4c350 7420 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7421};
7422
591d71cb 7423#if defined(CONFIG_NFS_V4_1)
17280175 7424static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7425 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7426 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7427 .recover_open = nfs4_open_reclaim,
7428 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7429 .establish_clid = nfs41_init_clientid,
fce5c838 7430 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7431 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7432};
7433#endif /* CONFIG_NFS_V4_1 */
7434
17280175 7435static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7436 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7437 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7438 .recover_open = nfs4_open_expired,
7439 .recover_lock = nfs4_lock_expired,
7440 .establish_clid = nfs4_init_clientid,
7441};
7442
7443#if defined(CONFIG_NFS_V4_1)
17280175 7444static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7445 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7446 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7447 .recover_open = nfs41_open_expired,
7448 .recover_lock = nfs41_lock_expired,
4d643d1d 7449 .establish_clid = nfs41_init_clientid,
1da177e4 7450};
591d71cb 7451#endif /* CONFIG_NFS_V4_1 */
1da177e4 7452
17280175 7453static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7454 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7455 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7456 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7457};
7458
7459#if defined(CONFIG_NFS_V4_1)
17280175 7460static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7461 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7462 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7463 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7464};
7465#endif
7466
97dc1359
TM		 7467static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7468 .minor_version = 0,
39c6daae
TM		 7469 .init_caps = NFS_CAP_READDIRPLUS
7470 | NFS_CAP_ATOMIC_OPEN
7471 | NFS_CAP_CHANGE_ATTR
7472 | NFS_CAP_POSIX_LOCK,
97dc1359 7473 .call_sync = _nfs4_call_sync,
36281caa 7474 .match_stateid = nfs4_match_stateid,
fca78d6d 7475 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7476 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7477 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7478 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7479 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7480};
7481
7482#if defined(CONFIG_NFS_V4_1)
7483static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7484 .minor_version = 1,
39c6daae
TM		 7485 .init_caps = NFS_CAP_READDIRPLUS
7486 | NFS_CAP_ATOMIC_OPEN
7487 | NFS_CAP_CHANGE_ATTR
3b66486c 7488 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7489 | NFS_CAP_STATEID_NFSV41
7490 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7491 .call_sync = nfs4_call_sync_sequence,
36281caa 7492 .match_stateid = nfs41_match_stateid,
fca78d6d 7493 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7494 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7495 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7496 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7497 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7498};
7499#endif
7500
42c2c424
SD		 7501#if defined(CONFIG_NFS_V4_2)
7502static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7503 .minor_version = 2,
7017310a
BS		 7504 .init_caps = NFS_CAP_READDIRPLUS
7505 | NFS_CAP_ATOMIC_OPEN
7506 | NFS_CAP_CHANGE_ATTR
7507 | NFS_CAP_POSIX_LOCK
7508 | NFS_CAP_STATEID_NFSV41
7509 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7510 .call_sync = nfs4_call_sync_sequence,
7511 .match_stateid = nfs41_match_stateid,
7512 .find_root_sec = nfs41_find_root_sec,
7017310a 7513 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7514 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7515 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7516 .state_renewal_ops = &nfs41_state_renewal_ops,
7517};
7518#endif
7519
97dc1359
TM		 7520const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7521 [0] = &nfs_v4_0_minor_ops,
7522#if defined(CONFIG_NFS_V4_1)
7523 [1] = &nfs_v4_1_minor_ops,
7524#endif
42c2c424
SD		 7525#if defined(CONFIG_NFS_V4_2)
7526 [2] = &nfs_v4_2_minor_ops,
7527#endif
97dc1359
TM		 7528};
7529
17f26b12 7530static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7531 .create = nfs_create,
7532 .lookup = nfs_lookup,
7533 .atomic_open = nfs_atomic_open,
7534 .link = nfs_link,
7535 .unlink = nfs_unlink,
7536 .symlink = nfs_symlink,
7537 .mkdir = nfs_mkdir,
7538 .rmdir = nfs_rmdir,
7539 .mknod = nfs_mknod,
7540 .rename = nfs_rename,
7541 .permission = nfs_permission,
7542 .getattr = nfs_getattr,
7543 .setattr = nfs_setattr,
7544 .getxattr = generic_getxattr,
7545 .setxattr = generic_setxattr,
7546 .listxattr = generic_listxattr,
7547 .removexattr = generic_removexattr,
7548};
7549
92e1d5be 7550static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7551 .permission = nfs_permission,
7552 .getattr = nfs_getattr,
7553 .setattr = nfs_setattr,
64c2ce8b
AK		 7554 .getxattr = generic_getxattr,
7555 .setxattr = generic_setxattr,
7556 .listxattr = generic_listxattr,
7557 .removexattr = generic_removexattr,
6b3b5496
BF		 7558};
7559
509de811 7560const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7561 .version = 4, /* protocol version */
7562 .dentry_ops = &nfs4_dentry_operations,
7563 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7564 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7565 .file_ops = &nfs4_file_operations,
1da177e4 7566 .getroot = nfs4_proc_get_root,
281cad46 7567 .submount = nfs4_submount,
ff9099f2 7568 .try_mount = nfs4_try_mount,
1da177e4
LT		 7569 .getattr = nfs4_proc_getattr,
7570 .setattr = nfs4_proc_setattr,
7571 .lookup = nfs4_proc_lookup,
7572 .access = nfs4_proc_access,
7573 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7574 .create = nfs4_proc_create,
7575 .remove = nfs4_proc_remove,
7576 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7577 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7578 .unlink_done = nfs4_proc_unlink_done,
7579 .rename = nfs4_proc_rename,
d3d4152a 7580 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7581 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7582 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7583 .link = nfs4_proc_link,
7584 .symlink = nfs4_proc_symlink,
7585 .mkdir = nfs4_proc_mkdir,
7586 .rmdir = nfs4_proc_remove,
7587 .readdir = nfs4_proc_readdir,
7588 .mknod = nfs4_proc_mknod,
7589 .statfs = nfs4_proc_statfs,
7590 .fsinfo = nfs4_proc_fsinfo,
7591 .pathconf = nfs4_proc_pathconf,
e9326dca 7592 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7593 .decode_dirent = nfs4_decode_dirent,
7594 .read_setup = nfs4_proc_read_setup,
1abb5088 7595 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7596 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7597 .read_done = nfs4_read_done,
1da177e4 7598 .write_setup = nfs4_proc_write_setup,
57208fa7 7599 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7600 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7601 .write_done = nfs4_write_done,
1da177e4 7602 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7603 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7604 .commit_done = nfs4_commit_done,
1da177e4 7605 .lock = nfs4_proc_lock,
e50a1c2e 7606 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7607 .close_context = nfs4_close_context,
2b484297 7608 .open_context = nfs4_atomic_open,
011e2a7f 7609 .have_delegation = nfs4_have_delegation,
57ec14c5 7610 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7611 .alloc_client = nfs4_alloc_client,
45a52a02 7612 .init_client = nfs4_init_client,
cdb7eced 7613 .free_client = nfs4_free_client,
1179acc6
BS		 7614 .create_server = nfs4_create_server,
7615 .clone_server = nfs_clone_server,
1da177e4
LT		 7616};
7617
64c2ce8b
AK		 7618static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7619 .prefix = XATTR_NAME_NFSV4_ACL,
7620 .list = nfs4_xattr_list_nfs4_acl,
7621 .get = nfs4_xattr_get_nfs4_acl,
7622 .set = nfs4_xattr_set_nfs4_acl,
7623};
7624
7625const struct xattr_handler *nfs4_xattr_handlers[] = {
7626 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7627#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7628 &nfs4_xattr_nfs4_label_handler,
7629#endif
64c2ce8b
AK		 7630 NULL
7631};
7632
1da177e4
LT		 7633/*
7634 * Local variables:
7635 * c-basic-offset: 8
7636 * End:
7637 */
Linux 6.x block layer and io_uring tree(s)