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RPCSEC_GSS: Clean up upcall message allocation
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315
BS		 154 case -NFS4ERR_WRONGSEC:
155 return -EPERM;
3ddeb7c5
TM		 156 case -NFS4ERR_BADOWNER:
157 case -NFS4ERR_BADNAME:
158 return -EINVAL;
fb13bfa7
TM		 159 case -NFS4ERR_SHARE_DENIED:
160 return -EACCES;
f25efd85
SD		 161 case -NFS4ERR_MINOR_VERS_MISMATCH:
162 return -EPROTONOSUPPORT;
6168f62c
WAA		 163 case -NFS4ERR_ACCESS:
164 return -EACCES;
6e3cf241
TM		 165 case -NFS4ERR_FILE_OPEN:
166 return -EBUSY;
52567b03 167 default:
1da177e4 168 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 169 __func__, -err);
52567b03 170 break;
1da177e4 171 }
52567b03 172 return -EIO;
1da177e4
LT		 173}
174
175/*
176 * This is our standard bitmap for GETATTR requests.
177 */
1549210f 178const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 179 FATTR4_WORD0_TYPE
180 | FATTR4_WORD0_CHANGE
181 | FATTR4_WORD0_SIZE
182 | FATTR4_WORD0_FSID
183 | FATTR4_WORD0_FILEID,
184 FATTR4_WORD1_MODE
185 | FATTR4_WORD1_NUMLINKS
186 | FATTR4_WORD1_OWNER
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 192 | FATTR4_WORD1_TIME_MODIFY,
193#ifdef CONFIG_NFS_V4_SECURITY_LABEL
194 FATTR4_WORD2_SECURITY_LABEL
195#endif
1da177e4
LT		 196};
197
1549210f
TM		 198static const u32 nfs4_pnfs_open_bitmap[3] = {
199 FATTR4_WORD0_TYPE
200 | FATTR4_WORD0_CHANGE
201 | FATTR4_WORD0_SIZE
202 | FATTR4_WORD0_FSID
203 | FATTR4_WORD0_FILEID,
204 FATTR4_WORD1_MODE
205 | FATTR4_WORD1_NUMLINKS
206 | FATTR4_WORD1_OWNER
207 | FATTR4_WORD1_OWNER_GROUP
208 | FATTR4_WORD1_RAWDEV
209 | FATTR4_WORD1_SPACE_USED
210 | FATTR4_WORD1_TIME_ACCESS
211 | FATTR4_WORD1_TIME_METADATA
212 | FATTR4_WORD1_TIME_MODIFY,
213 FATTR4_WORD2_MDSTHRESHOLD
214};
215
e23008ec
AA		 216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
a09df2ca 222const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
a09df2ca 231const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
dae100c2 237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
55b6e774 241 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 244};
245
a09df2ca 246const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 247 FATTR4_WORD0_TYPE
248 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_SIZE
250 | FATTR4_WORD0_FSID
251 | FATTR4_WORD0_FILEID
252 | FATTR4_WORD0_FS_LOCATIONS,
253 FATTR4_WORD1_MODE
254 | FATTR4_WORD1_NUMLINKS
255 | FATTR4_WORD1_OWNER
256 | FATTR4_WORD1_OWNER_GROUP
257 | FATTR4_WORD1_RAWDEV
258 | FATTR4_WORD1_SPACE_USED
259 | FATTR4_WORD1_TIME_ACCESS
260 | FATTR4_WORD1_TIME_METADATA
261 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 262 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 263};
264
bc4785cd 265static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 266 struct nfs4_readdir_arg *readdir)
267{
0dbb4c67 268 __be32 *start, *p;
1da177e4 269
1da177e4 270 if (cookie > 2) {
b7ef1956 271 readdir->cookie = cookie;
1da177e4
LT		 272 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
273 return;
274 }
275
276 readdir->cookie = 0;
277 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
278 if (cookie == 2)
279 return;
280
281 /*
282 * NFSv4 servers do not return entries for '.' and '..'
283 * Therefore, we fake these entries here. We let '.'
284 * have cookie 0 and '..' have cookie 1. Note that
285 * when talking to the server, we always send cookie 0
286 * instead of 1 or 2.
287 */
2b86ce2d 288 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 289
290 if (cookie == 0) {
291 *p++ = xdr_one; /* next */
292 *p++ = xdr_zero; /* cookie, first word */
293 *p++ = xdr_one; /* cookie, second word */
294 *p++ = xdr_one; /* entry len */
295 memcpy(p, ".\0\0\0", 4); /* entry */
296 p++;
297 *p++ = xdr_one; /* bitmap length */
298 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
299 *p++ = htonl(8); /* attribute buffer length */
4e769b93 300 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 301 }
302
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_two; /* cookie, second word */
306 *p++ = xdr_two; /* entry len */
307 memcpy(p, "..\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
4e769b93 312 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 313
314 readdir->pgbase = (char *)p - (char *)start;
315 readdir->count -= readdir->pgbase;
2b86ce2d 316 kunmap_atomic(start);
1da177e4
LT		 317}
318
65de872e
TM		 319static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
320{
321 int res = 0;
322
323 might_sleep();
324
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 329 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 330 if (fatal_signal_pending(current))
331 res = -ERESTARTSYS;
332 *timeout <<= 1;
333 return res;
334}
335
336/* This is the error handling routine for processes that are allowed
337 * to sleep.
338 */
b064eca2 339static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 340{
341 struct nfs_client *clp = server->nfs_client;
9e33bed5 342 struct nfs4_state *state = exception->state;
3114ea7a 343 struct inode *inode = exception->inode;
65de872e
TM		 344 int ret = errorcode;
345
346 exception->retry = 0;
347 switch(errorcode) {
348 case 0:
349 return 0;
3114ea7a 350 case -NFS4ERR_OPENMODE:
011e2a7f 351 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 352 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 353 exception->retry = 1;
354 return 0;
355 }
356 if (state == NULL)
357 break;
5d422301
TM		 358 ret = nfs4_schedule_stateid_recovery(server, state);
359 if (ret < 0)
360 break;
3114ea7a 361 goto wait_on_recovery;
a1d0b5ee 362 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 365 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
366 nfs_remove_bad_delegation(inode);
367 exception->retry = 1;
368 break;
369 }
9e33bed5
TM		 370 if (state == NULL)
371 break;
5d422301
TM		 372 ret = nfs4_schedule_stateid_recovery(server, state);
373 if (ret < 0)
374 break;
0400a6b0 375 goto wait_on_recovery;
0ced63d1 376 case -NFS4ERR_EXPIRED:
5d422301
TM		 377 if (state != NULL) {
378 ret = nfs4_schedule_stateid_recovery(server, state);
379 if (ret < 0)
380 break;
381 }
65de872e 382 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 383 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 384 nfs4_schedule_lease_recovery(clp);
385 goto wait_on_recovery;
03391693 386#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 387 case -NFS4ERR_BADSESSION:
388 case -NFS4ERR_BADSLOT:
389 case -NFS4ERR_BAD_HIGH_SLOT:
390 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
391 case -NFS4ERR_DEADSESSION:
392 case -NFS4ERR_SEQ_FALSE_RETRY:
393 case -NFS4ERR_SEQ_MISORDERED:
394 dprintk("%s ERROR: %d Reset session\n", __func__,
395 errorcode);
9f594791 396 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 397 goto wait_on_recovery;
03391693 398#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 399 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 400 if (exception->timeout > HZ) {
401 /* We have retried a decent amount, time to
402 * fail
403 */
404 ret = -EBUSY;
405 break;
406 }
65de872e
TM		 407 case -NFS4ERR_GRACE:
408 case -NFS4ERR_DELAY:
409 ret = nfs4_delay(server->client, &exception->timeout);
410 if (ret != 0)
411 break;
a8a4ae3a 412 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 413 case -NFS4ERR_OLD_STATEID:
414 exception->retry = 1;
b064eca2
TM		 415 break;
416 case -NFS4ERR_BADOWNER:
417 /* The following works around a Linux server bug! */
418 case -NFS4ERR_BADNAME:
419 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
420 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
421 exception->retry = 1;
422 printk(KERN_WARNING "NFS: v4 server %s "
423 "does not accept raw "
424 "uid/gids. "
425 "Reenabling the idmapper.\n",
426 server->nfs_client->cl_hostname);
427 }
65de872e
TM		 428 }
429 /* We failed to handle the error */
430 return nfs4_map_errors(ret);
0400a6b0 431wait_on_recovery:
a2c0b9e2
TM		 432 ret = nfs4_wait_clnt_recover(clp);
433 if (ret == 0)
434 exception->retry = 1;
435 return ret;
65de872e
TM		 436}
437
438
452e9352 439static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 440{
1da177e4
LT		 441 spin_lock(&clp->cl_lock);
442 if (time_before(clp->cl_last_renewal,timestamp))
443 clp->cl_last_renewal = timestamp;
444 spin_unlock(&clp->cl_lock);
445}
446
452e9352
TM		 447static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
448{
449 do_renew_lease(server->nfs_client, timestamp);
450}
451
cccef3b9
AA		 452#if defined(CONFIG_NFS_V4_1)
453
d185a334 454static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 455{
e3725ec0 456 struct nfs4_session *session;
13615871 457 struct nfs4_slot_table *tbl;
c10e4498 458 bool send_new_highest_used_slotid = false;
13615871 459
dfb4f309 460 if (!res->sr_slot) {
13615871
AA		 461 /* just wake up the next guy waiting since
462 * we may have not consumed a slot after all */
691daf3b 463 dprintk("%s: No slot\n", __func__);
35dc1d74 464 return;
13615871 465 }
e3725ec0
TM		 466 tbl = res->sr_slot->table;
467 session = tbl->session;
ea028ac9 468
35dc1d74 469 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 470 /* Be nice to the server: try to ensure that the last transmitted
471 * value for highest_user_slotid <= target_highest_slotid
472 */
473 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
474 send_new_highest_used_slotid = true;
475
b75ad4cd
TM		 476 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
477 send_new_highest_used_slotid = false;
478 goto out_unlock;
479 }
f4af6e2a 480 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 481
482 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
483 send_new_highest_used_slotid = false;
b75ad4cd 484out_unlock:
35dc1d74 485 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 486 res->sr_slot = NULL;
c10e4498
TM		 487 if (send_new_highest_used_slotid)
488 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 489}
490
14516c3a 491static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 492{
e3725ec0 493 struct nfs4_session *session;
933602e3 494 struct nfs4_slot *slot;
14516c3a 495 struct nfs_client *clp;
ac20d163 496 bool interrupted = false;
85563073 497 int ret = 1;
b0df806c 498
468f8613
BS		 499 /* don't increment the sequence number if the task wasn't sent */
500 if (!RPC_WAS_SENT(task))
b0df806c
AA		 501 goto out;
502
933602e3 503 slot = res->sr_slot;
e3725ec0 504 session = slot->table->session;
933602e3 505
ac20d163
TM		 506 if (slot->interrupted) {
507 slot->interrupted = 0;
508 interrupted = true;
509 }
510
2f92ae34 511 trace_nfs4_sequence_done(session, res);
691daf3b 512 /* Check the SEQUENCE operation status */
14516c3a
TM		 513 switch (res->sr_status) {
514 case 0:
b0df806c 515 /* Update the slot's sequence and clientid lease timer */
933602e3 516 ++slot->seq_nr;
e3725ec0 517 clp = session->clp;
8e63b6a8 518 do_renew_lease(clp, res->sr_timestamp);
0629e370 519 /* Check sequence flags */
b4410c2f
TM		 520 if (res->sr_status_flags != 0)
521 nfs4_schedule_lease_recovery(clp);
464ee9f9 522 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 523 break;
ac20d163
TM		 524 case 1:
525 /*
526 * sr_status remains 1 if an RPC level error occurred.
527 * The server may or may not have processed the sequence
528 * operation..
529 * Mark the slot as having hosted an interrupted RPC call.
530 */
531 slot->interrupted = 1;
532 goto out;
14516c3a
TM		 533 case -NFS4ERR_DELAY:
534 /* The server detected a resend of the RPC call and
535 * returned NFS4ERR_DELAY as per Section 2.10.6.2
536 * of RFC5661.
537 */
df2fabff 538 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 539 __func__,
df2fabff 540 slot->slot_nr,
933602e3 541 slot->seq_nr);
14516c3a 542 goto out_retry;
85563073
TM		 543 case -NFS4ERR_BADSLOT:
544 /*
545 * The slot id we used was probably retired. Try again
546 * using a different slot id.
547 */
e8794440
TM		 548 goto retry_nowait;
549 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 550 /*
551 * Was the last operation on this sequence interrupted?
552 * If so, retry after bumping the sequence number.
553 */
554 if (interrupted) {
555 ++slot->seq_nr;
556 goto retry_nowait;
557 }
e8794440
TM		 558 /*
559 * Could this slot have been previously retired?
560 * If so, then the server may be expecting seq_nr = 1!
561 */
8e63b6a8
TM		 562 if (slot->seq_nr != 1) {
563 slot->seq_nr = 1;
564 goto retry_nowait;
565 }
566 break;
e8794440
TM		 567 case -NFS4ERR_SEQ_FALSE_RETRY:
568 ++slot->seq_nr;
569 goto retry_nowait;
14516c3a
TM		 570 default:
571 /* Just update the slot sequence no. */
933602e3 572 ++slot->seq_nr;
b0df806c
AA		 573 }
574out:
575 /* The session may be reset by one of the error handlers. */
576 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 577 nfs41_sequence_free_slot(res);
85563073 578 return ret;
e8794440
TM		 579retry_nowait:
580 if (rpc_restart_call_prepare(task)) {
581 task->tk_status = 0;
582 ret = 0;
583 }
584 goto out;
14516c3a 585out_retry:
d05dd4e9 586 if (!rpc_restart_call(task))
14516c3a
TM		 587 goto out;
588 rpc_delay(task, NFS4_POLL_RETRY_MAX);
589 return 0;
b0df806c
AA		 590}
591
14516c3a
TM		 592static int nfs4_sequence_done(struct rpc_task *task,
593 struct nfs4_sequence_res *res)
df896455 594{
e3725ec0 595 if (res->sr_slot == NULL)
14516c3a
TM		 596 return 1;
597 return nfs41_sequence_done(task, res);
df896455
TM		 598}
599
9d12b216
TM		 600static void nfs41_init_sequence(struct nfs4_sequence_args *args,
601 struct nfs4_sequence_res *res, int cache_reply)
602{
2b2fa717 603 args->sa_slot = NULL;
9d12b216 604 args->sa_cache_this = 0;
8fe72bac 605 args->sa_privileged = 0;
9d12b216
TM		 606 if (cache_reply)
607 args->sa_cache_this = 1;
9d12b216
TM		 608 res->sr_slot = NULL;
609}
610
8fe72bac
TM		 611static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
612{
613 args->sa_privileged = 1;
614}
615
dc70d7b3 616int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
ce5039c1
AA		 619 struct rpc_task *task)
620{
fbcd4abc
AA		 621 struct nfs4_slot *slot;
622 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 623
624 dprintk("--> %s\n", __func__);
ce5039c1 625 /* slot already allocated? */
dfb4f309 626 if (res->sr_slot != NULL)
d9afbd1b 627 goto out_success;
ce5039c1 628
fbcd4abc
AA		 629 tbl = &session->fc_slot_table;
630
69d206b5
TM		 631 task->tk_timeout = 0;
632
fbcd4abc 633 spin_lock(&tbl->slot_tbl_lock);
774d5f14 634 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 635 !args->sa_privileged) {
0b1c8fc4 636 /* The state manager will wait until the slot table is empty */
0b1c8fc4 637 dprintk("%s session is draining\n", __func__);
7b939a3f 638 goto out_sleep;
689cf5c1
AB		 639 }
640
2dc03b7f 641 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 642 if (IS_ERR(slot)) {
643 /* If out of memory, try again in 1/4 second */
644 if (slot == ERR_PTR(-ENOMEM))
645 task->tk_timeout = HZ >> 2;
fbcd4abc 646 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 647 goto out_sleep;
fbcd4abc
AA		 648 }
649 spin_unlock(&tbl->slot_tbl_lock);
650
2b2fa717 651 args->sa_slot = slot;
fbcd4abc 652
2dc03b7f
TM		 653 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
654 slot->slot_nr, slot->seq_nr);
fbcd4abc 655
dfb4f309 656 res->sr_slot = slot;
8e63b6a8 657 res->sr_timestamp = jiffies;
2a6e26cd 658 res->sr_status_flags = 0;
fbcd4abc
AA		 659 /*
660 * sr_status is only set in decode_sequence, and so will remain
661 * set to 1 if an rpc level failure occurs.
662 */
663 res->sr_status = 1;
2f92ae34 664 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 665out_success:
666 rpc_call_start(task);
ce5039c1 667 return 0;
7b939a3f 668out_sleep:
8fe72bac
TM		 669 /* Privileged tasks are queued with top priority */
670 if (args->sa_privileged)
1e1093c7
TM		 671 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
672 NULL, RPC_PRIORITY_PRIVILEGED);
673 else
674 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 675 spin_unlock(&tbl->slot_tbl_lock);
676 return -EAGAIN;
ce5039c1 677}
dc70d7b3 678EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 679
035168ab 680int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
ce5039c1
AA		 683 struct rpc_task *task)
684{
035168ab 685 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 686 int ret = 0;
687
d9afbd1b
TM		 688 if (session == NULL) {
689 rpc_call_start(task);
035168ab 690 goto out;
d9afbd1b 691 }
035168ab 692
df2fabff 693 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 694 __func__, session->clp, session, res->sr_slot ?
df2fabff 695 res->sr_slot->slot_nr : -1);
ce5039c1 696
9d12b216 697 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 698out:
699 dprintk("<-- %s status=%d\n", __func__, ret);
700 return ret;
701}
702
703struct nfs41_call_sync_data {
035168ab 704 const struct nfs_server *seq_server;
ce5039c1
AA		 705 struct nfs4_sequence_args *seq_args;
706 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 707};
708
709static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
710{
711 struct nfs41_call_sync_data *data = calldata;
6ba7db34 712 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 713
035168ab
TM		 714 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
715
d9afbd1b 716 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 717}
718
69ab40c4
AA		 719static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
720{
721 struct nfs41_call_sync_data *data = calldata;
722
14516c3a 723 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 724}
725
17280175 726static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 727 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 728 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 729};
730
7c513058
BS		 731static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
732 struct nfs_server *server,
ce5039c1
AA		 733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
8fe72bac 735 struct nfs4_sequence_res *res)
ce5039c1
AA		 736{
737 int ret;
738 struct rpc_task *task;
739 struct nfs41_call_sync_data data = {
035168ab 740 .seq_server = server,
ce5039c1
AA		 741 .seq_args = args,
742 .seq_res = res,
ce5039c1
AA		 743 };
744 struct rpc_task_setup task_setup = {
7c513058 745 .rpc_client = clnt,
ce5039c1
AA		 746 .rpc_message = msg,
747 .callback_ops = &nfs41_call_sync_ops,
748 .callback_data = &data
749 };
750
ce5039c1
AA		 751 task = rpc_run_task(&task_setup);
752 if (IS_ERR(task))
753 ret = PTR_ERR(task);
754 else {
755 ret = task->tk_status;
756 rpc_put_task(task);
757 }
758 return ret;
759}
760
df896455 761#else
8fe72bac 762static
9d12b216
TM		 763void nfs41_init_sequence(struct nfs4_sequence_args *args,
764 struct nfs4_sequence_res *res, int cache_reply)
765{
766}
767
8fe72bac
TM		 768static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
769{
770}
771
772
14516c3a
TM		 773static int nfs4_sequence_done(struct rpc_task *task,
774 struct nfs4_sequence_res *res)
df896455 775{
14516c3a 776 return 1;
df896455 777}
cccef3b9
AA		 778#endif /* CONFIG_NFS_V4_1 */
779
fd0c0953 780static
7c513058
BS		 781int _nfs4_call_sync(struct rpc_clnt *clnt,
782 struct nfs_server *server,
cccef3b9
AA		 783 struct rpc_message *msg,
784 struct nfs4_sequence_args *args,
fd0c0953 785 struct nfs4_sequence_res *res)
cccef3b9 786{
7c513058 787 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 788}
789
fd0c0953 790static
7c513058
BS		 791int nfs4_call_sync(struct rpc_clnt *clnt,
792 struct nfs_server *server,
e73b83f2
BS		 793 struct rpc_message *msg,
794 struct nfs4_sequence_args *args,
795 struct nfs4_sequence_res *res,
796 int cache_reply)
797{
fd0c0953 798 nfs41_init_sequence(args, res, cache_reply);
7c513058 799 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 800 args, res);
e73b83f2 801}
cccef3b9 802
38478b24 803static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 804{
38478b24 805 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 806
38478b24 807 spin_lock(&dir->i_lock);
359d7d1c 808 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 809 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 810 nfs_force_lookup_revalidate(dir);
a9a4a87a 811 dir->i_version = cinfo->after;
de242c0b 812 nfs_fscache_invalidate(dir);
38478b24 813 spin_unlock(&dir->i_lock);
1da177e4
LT		 814}
815
e56e0b78 816struct nfs4_opendata {
c6d00e63 817 struct kref kref;
e56e0b78
TM		 818 struct nfs_openargs o_arg;
819 struct nfs_openres o_res;
cdd4e68b
TM		 820 struct nfs_open_confirmargs c_arg;
821 struct nfs_open_confirmres c_res;
6926afd1
TM		 822 struct nfs4_string owner_name;
823 struct nfs4_string group_name;
e56e0b78 824 struct nfs_fattr f_attr;
1775fd3e 825 struct nfs4_label *f_label;
e56e0b78 826 struct dentry *dir;
82a2c1b7 827 struct dentry *dentry;
e56e0b78 828 struct nfs4_state_owner *owner;
aac00a8d 829 struct nfs4_state *state;
e56e0b78 830 struct iattr attrs;
26e976a8 831 unsigned long timestamp;
3e309914 832 unsigned int rpc_done : 1;
bdeca1b7 833 unsigned int is_recover : 1;
24ac23ab
TM		 834 int rpc_status;
835 int cancelled;
e56e0b78
TM		 836};
837
49f9a0fa
TM		 838static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
839 int err, struct nfs4_exception *exception)
840{
841 if (err != -EINVAL)
842 return false;
843 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
844 return false;
845 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
846 exception->retry = 1;
847 return true;
848}
849
850static enum open_claim_type4
851nfs4_map_atomic_open_claim(struct nfs_server *server,
852 enum open_claim_type4 claim)
853{
854 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
855 return claim;
856 switch (claim) {
857 default:
858 return claim;
859 case NFS4_OPEN_CLAIM_FH:
860 return NFS4_OPEN_CLAIM_NULL;
861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
862 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
863 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
864 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
865 }
866}
2ced46c2
TM		 867
868static void nfs4_init_opendata_res(struct nfs4_opendata *p)
869{
870 p->o_res.f_attr = &p->f_attr;
1775fd3e 871 p->o_res.f_label = p->f_label;
c1d51931
TM		 872 p->o_res.seqid = p->o_arg.seqid;
873 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 874 p->o_res.server = p->o_arg.server;
5f657530 875 p->o_res.access_request = p->o_arg.access;
2ced46c2 876 nfs_fattr_init(&p->f_attr);
6926afd1 877 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 878}
879
82a2c1b7 880static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 881 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 882 const struct iattr *attrs,
1775fd3e 883 struct nfs4_label *label,
4a1c0893 884 enum open_claim_type4 claim,
8535b2be 885 gfp_t gfp_mask)
e56e0b78 886{
82a2c1b7 887 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 888 struct inode *dir = parent->d_inode;
889 struct nfs_server *server = NFS_SERVER(dir);
890 struct nfs4_opendata *p;
891
8535b2be 892 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 893 if (p == NULL)
894 goto err;
14c43f76
DQ		 895
896 p->f_label = nfs4_label_alloc(server, gfp_mask);
897 if (IS_ERR(p->f_label))
898 goto err_free_p;
899
8535b2be 900 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 901 if (p->o_arg.seqid == NULL)
14c43f76 902 goto err_free_label;
82a2c1b7
AV		 903 nfs_sb_active(dentry->d_sb);
904 p->dentry = dget(dentry);
e56e0b78
TM		 905 p->dir = parent;
906 p->owner = sp;
907 atomic_inc(&sp->so_count);
dc0b027d
TM		 908 p->o_arg.open_flags = flags;
909 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 910 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
911 * will return permission denied for all bits until close */
912 if (!(flags & O_EXCL)) {
913 /* ask server to check for all possible rights as results
914 * are cached */
915 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
916 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 917 }
7539bbab 918 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 919 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
920 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 921 p->o_arg.name = &dentry->d_name;
e56e0b78 922 p->o_arg.server = server;
aa9c2669 923 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 924 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 925 p->o_arg.label = label;
49f9a0fa
TM		 926 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
927 switch (p->o_arg.claim) {
4a1c0893
TM		 928 case NFS4_OPEN_CLAIM_NULL:
929 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
930 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
931 p->o_arg.fh = NFS_FH(dir);
932 break;
933 case NFS4_OPEN_CLAIM_PREVIOUS:
934 case NFS4_OPEN_CLAIM_FH:
935 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
936 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
937 p->o_arg.fh = NFS_FH(dentry->d_inode);
938 }
536e43d1 939 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 940 __u32 verf[2];
d77d76ff 941
e56e0b78
TM		 942 p->o_arg.u.attrs = &p->attrs;
943 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 944
945 verf[0] = jiffies;
946 verf[1] = current->pid;
947 memcpy(p->o_arg.u.verifier.data, verf,
948 sizeof(p->o_arg.u.verifier.data));
e56e0b78 949 }
cdd4e68b
TM		 950 p->c_arg.fh = &p->o_res.fh;
951 p->c_arg.stateid = &p->o_res.stateid;
952 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 953 nfs4_init_opendata_res(p);
c6d00e63 954 kref_init(&p->kref);
e56e0b78 955 return p;
14c43f76
DQ		 956
957err_free_label:
958 nfs4_label_free(p->f_label);
959err_free_p:
e56e0b78
TM		 960 kfree(p);
961err:
962 dput(parent);
963 return NULL;
964}
965
c6d00e63 966static void nfs4_opendata_free(struct kref *kref)
e56e0b78 967{
c6d00e63
TM		 968 struct nfs4_opendata *p = container_of(kref,
969 struct nfs4_opendata, kref);
82a2c1b7 970 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 971
972 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 973 if (p->state != NULL)
974 nfs4_put_open_state(p->state);
c6d00e63 975 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 976
977 nfs4_label_free(p->f_label);
978
c6d00e63 979 dput(p->dir);
82a2c1b7
AV		 980 dput(p->dentry);
981 nfs_sb_deactive(sb);
6926afd1 982 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 983 kfree(p);
984}
985
986static void nfs4_opendata_put(struct nfs4_opendata *p)
987{
988 if (p != NULL)
989 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 990}
991
06f814a3
TM		 992static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
993{
06f814a3
TM		 994 int ret;
995
06f814a3 996 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 997 return ret;
998}
999
dc0b027d 1000static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1001{
1002 int ret = 0;
dc0b027d 1003
536e43d1 1004 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1005 goto out;
1006 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1007 case FMODE_READ:
88069f77
TM		 1008 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1009 && state->n_rdonly != 0;
6ee41268
TM		 1010 break;
1011 case FMODE_WRITE:
88069f77
TM		 1012 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1013 && state->n_wronly != 0;
6ee41268
TM		 1014 break;
1015 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1016 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1017 && state->n_rdwr != 0;
6ee41268 1018 }
dc0b027d 1019out:
6ee41268
TM		 1020 return ret;
1021}
1022
dc0b027d 1023static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1024{
652f89f6
TM		 1025 if (delegation == NULL)
1026 return 0;
dc0b027d 1027 if ((delegation->type & fmode) != fmode)
aac00a8d 1028 return 0;
15c831bf 1029 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1030 return 0;
d25be546
TM		 1031 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1032 return 0;
b7391f44 1033 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1034 return 1;
1035}
1036
dc0b027d 1037static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1038{
dc0b027d 1039 switch (fmode) {
e7616923
TM		 1040 case FMODE_WRITE:
1041 state->n_wronly++;
1042 break;
1043 case FMODE_READ:
1044 state->n_rdonly++;
1045 break;
1046 case FMODE_READ|FMODE_WRITE:
1047 state->n_rdwr++;
1048 }
dc0b027d 1049 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1050}
1051
dc0b027d 1052static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1053{
1054 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1055 nfs4_stateid_copy(&state->stateid, stateid);
1056 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1057 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1058 switch (fmode) {
003707c7
TM		 1059 case FMODE_READ:
1060 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1061 break;
1062 case FMODE_WRITE:
1063 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1064 break;
1065 case FMODE_READ|FMODE_WRITE:
1066 set_bit(NFS_O_RDWR_STATE, &state->flags);
1067 }
e7616923
TM		 1068}
1069
dc0b027d 1070static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1071{
8bda4e4c 1072 write_seqlock(&state->seqlock);
dc0b027d 1073 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1074 write_sequnlock(&state->seqlock);
003707c7
TM		 1075}
1076
dc0b027d 1077static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1078{
8bda4e4c
TM		 1079 /*
1080 * Protect the call to nfs4_state_set_mode_locked and
1081 * serialise the stateid update
1082 */
1083 write_seqlock(&state->seqlock);
003707c7 1084 if (deleg_stateid != NULL) {
f597c537 1085 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1086 set_bit(NFS_DELEGATED_STATE, &state->flags);
1087 }
1088 if (open_stateid != NULL)
dc0b027d 1089 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1090 write_sequnlock(&state->seqlock);
1091 spin_lock(&state->owner->so_lock);
dc0b027d 1092 update_open_stateflags(state, fmode);
ec073428 1093 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1094}
1095
dc0b027d 1096static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1097{
1098 struct nfs_inode *nfsi = NFS_I(state->inode);
1099 struct nfs_delegation *deleg_cur;
1100 int ret = 0;
1101
dc0b027d 1102 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1103
1104 rcu_read_lock();
1105 deleg_cur = rcu_dereference(nfsi->delegation);
1106 if (deleg_cur == NULL)
1107 goto no_delegation;
1108
1109 spin_lock(&deleg_cur->lock);
17f26b12 1110 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1111 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1112 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1113 goto no_delegation_unlock;
1114
1115 if (delegation == NULL)
1116 delegation = &deleg_cur->stateid;
f597c537 1117 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1118 goto no_delegation_unlock;
1119
b7391f44 1120 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1121 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1122 ret = 1;
1123no_delegation_unlock:
1124 spin_unlock(&deleg_cur->lock);
1125no_delegation:
1126 rcu_read_unlock();
1127
1128 if (!ret && open_stateid != NULL) {
dc0b027d 1129 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1130 ret = 1;
1131 }
1132
1133 return ret;
1134}
1135
1136
dc0b027d 1137static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1138{
1139 struct nfs_delegation *delegation;
1140
1141 rcu_read_lock();
1142 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1143 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1144 rcu_read_unlock();
1145 return;
1146 }
1147 rcu_read_unlock();
57ec14c5 1148 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1149}
1150
6ee41268 1151static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1152{
1153 struct nfs4_state *state = opendata->state;
1154 struct nfs_inode *nfsi = NFS_I(state->inode);
1155 struct nfs_delegation *delegation;
f448badd 1156 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1157 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1158 nfs4_stateid stateid;
1159 int ret = -EAGAIN;
1160
aac00a8d 1161 for (;;) {
dc0b027d 1162 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1163 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1164 if (can_open_cached(state, fmode, open_mode)) {
1165 update_open_stateflags(state, fmode);
6ee41268 1166 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1167 goto out_return_state;
1168 }
1169 spin_unlock(&state->owner->so_lock);
1170 }
34310430
TM		 1171 rcu_read_lock();
1172 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1173 if (!can_open_delegated(delegation, fmode)) {
34310430 1174 rcu_read_unlock();
aac00a8d 1175 break;
34310430 1176 }
aac00a8d 1177 /* Save the delegation */
f597c537 1178 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1179 rcu_read_unlock();
fa332941 1180 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1181 if (!opendata->is_recover) {
1182 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1183 if (ret != 0)
1184 goto out;
1185 }
aac00a8d 1186 ret = -EAGAIN;
34310430
TM		 1187
1188 /* Try to update the stateid using the delegation */
dc0b027d 1189 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1190 goto out_return_state;
aac00a8d 1191 }
aac00a8d
TM		 1192out:
1193 return ERR_PTR(ret);
1194out_return_state:
1195 atomic_inc(&state->count);
1196 return state;
1197}
1198
e23008ec
AA		 1199static void
1200nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1201{
1202 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1203 struct nfs_delegation *delegation;
1204 int delegation_flags = 0;
1205
1206 rcu_read_lock();
1207 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1208 if (delegation)
1209 delegation_flags = delegation->flags;
1210 rcu_read_unlock();
1211 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1212 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1213 "returning a delegation for "
1214 "OPEN(CLAIM_DELEGATE_CUR)\n",
1215 clp->cl_hostname);
1216 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1217 nfs_inode_set_delegation(state->inode,
1218 data->owner->so_cred,
1219 &data->o_res);
1220 else
1221 nfs_inode_reclaim_delegation(state->inode,
1222 data->owner->so_cred,
1223 &data->o_res);
1224}
1225
1226/*
1227 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1228 * and update the nfs4_state.
1229 */
1230static struct nfs4_state *
1231_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1232{
1233 struct inode *inode = data->state->inode;
1234 struct nfs4_state *state = data->state;
1235 int ret;
1236
1237 if (!data->rpc_done) {
1238 ret = data->rpc_status;
1239 goto err;
1240 }
1241
1242 ret = -ESTALE;
1243 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1244 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1245 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1246 goto err;
1247
1248 ret = -ENOMEM;
1249 state = nfs4_get_open_state(inode, data->owner);
1250 if (state == NULL)
1251 goto err;
1252
1253 ret = nfs_refresh_inode(inode, &data->f_attr);
1254 if (ret)
1255 goto err;
1256
aa9c2669
DQ		 1257 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1258
e23008ec
AA		 1259 if (data->o_res.delegation_type != 0)
1260 nfs4_opendata_check_deleg(data, state);
1261 update_open_stateid(state, &data->o_res.stateid, NULL,
1262 data->o_arg.fmode);
1263
1264 return state;
1265err:
1266 return ERR_PTR(ret);
1267
1268}
1269
1270static struct nfs4_state *
1271_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1272{
1273 struct inode *inode;
1274 struct nfs4_state *state = NULL;
1b370bc2 1275 int ret;
24ac23ab 1276
aac00a8d 1277 if (!data->rpc_done) {
6ee41268 1278 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1279 goto out;
1280 }
1281
1b370bc2 1282 ret = -EAGAIN;
24ac23ab 1283 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1284 goto err;
1775fd3e 1285 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1286 ret = PTR_ERR(inode);
03f28e3a 1287 if (IS_ERR(inode))
1b370bc2
TM		 1288 goto err;
1289 ret = -ENOMEM;
24ac23ab
TM		 1290 state = nfs4_get_open_state(inode, data->owner);
1291 if (state == NULL)
1b370bc2 1292 goto err_put_inode;
e23008ec
AA		 1293 if (data->o_res.delegation_type != 0)
1294 nfs4_opendata_check_deleg(data, state);
34310430 1295 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1296 data->o_arg.fmode);
24ac23ab 1297 iput(inode);
aac00a8d 1298out:
7aa262b5 1299 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1300 return state;
1b370bc2
TM		 1301err_put_inode:
1302 iput(inode);
1303err:
1304 return ERR_PTR(ret);
24ac23ab
TM		 1305}
1306
e23008ec
AA		 1307static struct nfs4_state *
1308nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1309{
1310 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1311 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1312 return _nfs4_opendata_to_nfs4_state(data);
1313}
1314
864472e9
TM		 1315static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1316{
1317 struct nfs_inode *nfsi = NFS_I(state->inode);
1318 struct nfs_open_context *ctx;
1319
1320 spin_lock(&state->inode->i_lock);
1321 list_for_each_entry(ctx, &nfsi->open_files, list) {
1322 if (ctx->state != state)
1323 continue;
1324 get_nfs_open_context(ctx);
1325 spin_unlock(&state->inode->i_lock);
1326 return ctx;
1327 }
1328 spin_unlock(&state->inode->i_lock);
1329 return ERR_PTR(-ENOENT);
1330}
1331
4a1c0893
TM		 1332static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1333 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1334{
1335 struct nfs4_opendata *opendata;
1336
4a1c0893 1337 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1338 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1339 if (opendata == NULL)
1340 return ERR_PTR(-ENOMEM);
1341 opendata->state = state;
1342 atomic_inc(&state->count);
1343 return opendata;
1344}
1345
dc0b027d 1346static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1347{
2ced46c2 1348 struct nfs4_state *newstate;
864472e9
TM		 1349 int ret;
1350
dc0b027d
TM		 1351 opendata->o_arg.open_flags = 0;
1352 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1353 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1354 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1355 nfs4_init_opendata_res(opendata);
b257957e 1356 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1357 if (ret != 0)
1358 return ret;
2ced46c2 1359 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1360 if (IS_ERR(newstate))
1361 return PTR_ERR(newstate);
643168c2 1362 nfs4_close_state(newstate, fmode);
2ced46c2 1363 *res = newstate;
864472e9
TM		 1364 return 0;
1365}
1366
1367static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1368{
864472e9 1369 struct nfs4_state *newstate;
864472e9
TM		 1370 int ret;
1371
1372 /* memory barrier prior to reading state->n_* */
2ced46c2 1373 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1374 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1375 smp_rmb();
1376 if (state->n_rdwr != 0) {
b0ed9dbc 1377 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1378 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1379 if (ret != 0)
1380 return ret;
2ced46c2
TM		 1381 if (newstate != state)
1382 return -ESTALE;
864472e9
TM		 1383 }
1384 if (state->n_wronly != 0) {
b0ed9dbc 1385 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1386 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1387 if (ret != 0)
1388 return ret;
2ced46c2
TM		 1389 if (newstate != state)
1390 return -ESTALE;
864472e9
TM		 1391 }
1392 if (state->n_rdonly != 0) {
b0ed9dbc 1393 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1394 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1395 if (ret != 0)
1396 return ret;
2ced46c2
TM		 1397 if (newstate != state)
1398 return -ESTALE;
864472e9 1399 }
1ac7e2fd
TM		 1400 /*
1401 * We may have performed cached opens for all three recoveries.
1402 * Check if we need to update the current stateid.
1403 */
1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1405 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1406 write_seqlock(&state->seqlock);
1ac7e2fd 1407 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1408 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1409 write_sequnlock(&state->seqlock);
1ac7e2fd 1410 }
864472e9
TM		 1411 return 0;
1412}
1413
1da177e4
LT		 1414/*
1415 * OPEN_RECLAIM:
1416 * reclaim state on the server after a reboot.
1da177e4 1417 */
539cd03a 1418static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1419{
1ac7e2fd 1420 struct nfs_delegation *delegation;
864472e9 1421 struct nfs4_opendata *opendata;
dc0b027d 1422 fmode_t delegation_type = 0;
1da177e4
LT		 1423 int status;
1424
4a1c0893
TM		 1425 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1426 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1427 if (IS_ERR(opendata))
1428 return PTR_ERR(opendata);
1ac7e2fd
TM		 1429 rcu_read_lock();
1430 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1431 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1432 delegation_type = delegation->type;
1ac7e2fd 1433 rcu_read_unlock();
864472e9
TM		 1434 opendata->o_arg.u.delegation_type = delegation_type;
1435 status = nfs4_open_recover(opendata, state);
c6d00e63 1436 nfs4_opendata_put(opendata);
1da177e4
LT		 1437 return status;
1438}
1439
539cd03a 1440static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1441{
1442 struct nfs_server *server = NFS_SERVER(state->inode);
1443 struct nfs4_exception exception = { };
1444 int err;
1445 do {
539cd03a 1446 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1447 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1448 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1449 continue;
168667c4 1450 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1451 break;
1452 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1453 } while (exception.retry);
1454 return err;
1455}
1456
864472e9
TM		 1457static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1458{
1459 struct nfs_open_context *ctx;
1460 int ret;
1461
1462 ctx = nfs4_state_find_open_context(state);
1463 if (IS_ERR(ctx))
91876b13 1464 return -EAGAIN;
539cd03a 1465 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1466 put_nfs_open_context(ctx);
1467 return ret;
1468}
1469
db4f2e63 1470static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1471{
be76b5b6
TM		 1472 switch (err) {
1473 default:
1474 printk(KERN_ERR "NFS: %s: unhandled error "
1475 "%d.\n", __func__, err);
1476 case 0:
1477 case -ENOENT:
1478 case -ESTALE:
1479 break;
1480 case -NFS4ERR_BADSESSION:
1481 case -NFS4ERR_BADSLOT:
1482 case -NFS4ERR_BAD_HIGH_SLOT:
1483 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1484 case -NFS4ERR_DEADSESSION:
1485 set_bit(NFS_DELEGATED_STATE, &state->flags);
1486 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1487 return -EAGAIN;
1488 case -NFS4ERR_STALE_CLIENTID:
1489 case -NFS4ERR_STALE_STATEID:
1490 set_bit(NFS_DELEGATED_STATE, &state->flags);
1491 case -NFS4ERR_EXPIRED:
1492 /* Don't recall a delegation if it was lost */
1493 nfs4_schedule_lease_recovery(server->nfs_client);
1494 return -EAGAIN;
1495 case -NFS4ERR_DELEG_REVOKED:
1496 case -NFS4ERR_ADMIN_REVOKED:
1497 case -NFS4ERR_BAD_STATEID:
db4f2e63 1498 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1499 nfs_inode_find_state_and_recover(state->inode,
1500 stateid);
1501 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1502 return 0;
1503 case -NFS4ERR_DELAY:
1504 case -NFS4ERR_GRACE:
1505 set_bit(NFS_DELEGATED_STATE, &state->flags);
1506 ssleep(1);
1507 return -EAGAIN;
db4f2e63
TM		 1508 case -ENOMEM:
1509 case -NFS4ERR_DENIED:
1510 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1511 return 0;
be76b5b6 1512 }
1da177e4
LT		 1513 return err;
1514}
1515
db4f2e63
TM		 1516int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1517{
1518 struct nfs_server *server = NFS_SERVER(state->inode);
1519 struct nfs4_opendata *opendata;
1520 int err;
1521
1522 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1523 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1524 if (IS_ERR(opendata))
1525 return PTR_ERR(opendata);
1526 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1527 err = nfs4_open_recover(opendata, state);
1528 nfs4_opendata_put(opendata);
1529 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1530}
1531
cdd4e68b
TM		 1532static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1533{
1534 struct nfs4_opendata *data = calldata;
1535
1536 data->rpc_status = task->tk_status;
26e976a8 1537 if (data->rpc_status == 0) {
f597c537 1538 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1539 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1540 renew_lease(data->o_res.server, data->timestamp);
3e309914 1541 data->rpc_done = 1;
26e976a8 1542 }
cdd4e68b
TM		 1543}
1544
1545static void nfs4_open_confirm_release(void *calldata)
1546{
1547 struct nfs4_opendata *data = calldata;
1548 struct nfs4_state *state = NULL;
1549
1550 /* If this request hasn't been cancelled, do nothing */
1551 if (data->cancelled == 0)
1552 goto out_free;
1553 /* In case of error, no cleanup! */
3e309914 1554 if (!data->rpc_done)
cdd4e68b 1555 goto out_free;
cdd4e68b 1556 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1557 if (!IS_ERR(state))
643168c2 1558 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1559out_free:
c6d00e63 1560 nfs4_opendata_put(data);
cdd4e68b
TM		 1561}
1562
1563static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1564 .rpc_call_done = nfs4_open_confirm_done,
1565 .rpc_release = nfs4_open_confirm_release,
1566};
1567
1568/*
1569 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1570 */
1571static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1572{
1573 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1574 struct rpc_task *task;
5138fde0
TM		 1575 struct rpc_message msg = {
1576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1577 .rpc_argp = &data->c_arg,
1578 .rpc_resp = &data->c_res,
1579 .rpc_cred = data->owner->so_cred,
1580 };
c970aa85
TM		 1581 struct rpc_task_setup task_setup_data = {
1582 .rpc_client = server->client,
5138fde0 1583 .rpc_message = &msg,
c970aa85
TM		 1584 .callback_ops = &nfs4_open_confirm_ops,
1585 .callback_data = data,
101070ca 1586 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1587 .flags = RPC_TASK_ASYNC,
1588 };
1da177e4
LT		 1589 int status;
1590
c6d00e63 1591 kref_get(&data->kref);
3e309914
TM		 1592 data->rpc_done = 0;
1593 data->rpc_status = 0;
5138fde0 1594 data->timestamp = jiffies;
c970aa85 1595 task = rpc_run_task(&task_setup_data);
7a1218a2 1596 if (IS_ERR(task))
cdd4e68b 1597 return PTR_ERR(task);
cdd4e68b
TM		 1598 status = nfs4_wait_for_completion_rpc_task(task);
1599 if (status != 0) {
1600 data->cancelled = 1;
1601 smp_wmb();
1602 } else
1603 status = data->rpc_status;
e6b3c4db 1604 rpc_put_task(task);
1da177e4
LT		 1605 return status;
1606}
1607
24ac23ab 1608static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1609{
24ac23ab
TM		 1610 struct nfs4_opendata *data = calldata;
1611 struct nfs4_state_owner *sp = data->owner;
549b19cc 1612 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1613
24ac23ab 1614 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1615 goto out_wait;
aac00a8d
TM		 1616 /*
1617 * Check if we still need to send an OPEN call, or if we can use
1618 * a delegation instead.
1619 */
1620 if (data->state != NULL) {
1621 struct nfs_delegation *delegation;
1622
dc0b027d 1623 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1624 goto out_no_action;
aac00a8d
TM		 1625 rcu_read_lock();
1626 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1627 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1628 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1629 can_open_delegated(delegation, data->o_arg.fmode))
1630 goto unlock_no_action;
aac00a8d
TM		 1631 rcu_read_unlock();
1632 }
95b72eb0 1633 /* Update client id. */
549b19cc 1634 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1635 switch (data->o_arg.claim) {
1636 case NFS4_OPEN_CLAIM_PREVIOUS:
1637 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1638 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1639 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1640 case NFS4_OPEN_CLAIM_FH:
1641 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1642 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1643 }
26e976a8 1644 data->timestamp = jiffies;
035168ab 1645 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1646 &data->o_arg.seq_args,
2240a9e2
TM		 1647 &data->o_res.seq_res,
1648 task) != 0)
1649 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1650
1651 /* Set the create mode (note dependency on the session type) */
1652 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1653 if (data->o_arg.open_flags & O_EXCL) {
1654 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1655 if (nfs4_has_persistent_session(clp))
1656 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1657 else if (clp->cl_mvops->minor_version > 0)
1658 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1659 }
6ee41268 1660 return;
652f89f6
TM		 1661unlock_no_action:
1662 rcu_read_unlock();
6ee41268
TM		 1663out_no_action:
1664 task->tk_action = NULL;
c8da19b9 1665out_wait:
b75ad4cd 1666 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1667}
1668
24ac23ab
TM		 1669static void nfs4_open_done(struct rpc_task *task, void *calldata)
1670{
1671 struct nfs4_opendata *data = calldata;
1da177e4 1672
24ac23ab 1673 data->rpc_status = task->tk_status;
d898528c 1674
14516c3a
TM		 1675 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1676 return;
d898528c 1677
24ac23ab 1678 if (task->tk_status == 0) {
807d66d8
TM		 1679 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1680 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1681 case S_IFREG:
1682 break;
1683 case S_IFLNK:
24ac23ab 1684 data->rpc_status = -ELOOP;
6f926b5b
TM		 1685 break;
1686 case S_IFDIR:
24ac23ab 1687 data->rpc_status = -EISDIR;
6f926b5b
TM		 1688 break;
1689 default:
24ac23ab 1690 data->rpc_status = -ENOTDIR;
807d66d8 1691 }
6f926b5b 1692 }
26e976a8 1693 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1694 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1695 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1696 }
3e309914 1697 data->rpc_done = 1;
24ac23ab 1698}
6f926b5b 1699
24ac23ab
TM		 1700static void nfs4_open_release(void *calldata)
1701{
1702 struct nfs4_opendata *data = calldata;
1703 struct nfs4_state *state = NULL;
1704
1705 /* If this request hasn't been cancelled, do nothing */
1706 if (data->cancelled == 0)
1707 goto out_free;
1708 /* In case of error, no cleanup! */
3e309914 1709 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1710 goto out_free;
1711 /* In case we need an open_confirm, no cleanup! */
1712 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1713 goto out_free;
24ac23ab 1714 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1715 if (!IS_ERR(state))
643168c2 1716 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1717out_free:
c6d00e63 1718 nfs4_opendata_put(data);
24ac23ab
TM		 1719}
1720
1721static const struct rpc_call_ops nfs4_open_ops = {
1722 .rpc_call_prepare = nfs4_open_prepare,
1723 .rpc_call_done = nfs4_open_done,
1724 .rpc_release = nfs4_open_release,
1725};
1726
b257957e 1727static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1728{
1729 struct inode *dir = data->dir->d_inode;
1730 struct nfs_server *server = NFS_SERVER(dir);
1731 struct nfs_openargs *o_arg = &data->o_arg;
1732 struct nfs_openres *o_res = &data->o_res;
1733 struct rpc_task *task;
5138fde0
TM		 1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1736 .rpc_argp = o_arg,
1737 .rpc_resp = o_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
c970aa85
TM		 1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
5138fde0 1742 .rpc_message = &msg,
c970aa85
TM		 1743 .callback_ops = &nfs4_open_ops,
1744 .callback_data = data,
101070ca 1745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1746 .flags = RPC_TASK_ASYNC,
1747 };
24ac23ab
TM		 1748 int status;
1749
9d12b216 1750 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1751 kref_get(&data->kref);
3e309914
TM		 1752 data->rpc_done = 0;
1753 data->rpc_status = 0;
2ced46c2 1754 data->cancelled = 0;
bdeca1b7
TM		 1755 data->is_recover = 0;
1756 if (isrecover) {
8fe72bac 1757 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1758 data->is_recover = 1;
1759 }
c970aa85 1760 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1761 if (IS_ERR(task))
1762 return PTR_ERR(task);
1763 status = nfs4_wait_for_completion_rpc_task(task);
1764 if (status != 0) {
1765 data->cancelled = 1;
1766 smp_wmb();
1767 } else
1768 status = data->rpc_status;
1769 rpc_put_task(task);
1770
1771 return status;
1772}
1773
1774static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1775{
1776 struct inode *dir = data->dir->d_inode;
1777 struct nfs_openres *o_res = &data->o_res;
1778 int status;
1779
1780 status = nfs4_run_open_task(data, 1);
1781 if (status != 0 || !data->rpc_done)
1782 return status;
1783
6926afd1
TM		 1784 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1785
b257957e
AB		 1786 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1787 status = _nfs4_proc_open_confirm(data);
1788 if (status != 0)
1789 return status;
1790 }
1791
1792 return status;
1793}
1794
6168f62c
WAA		 1795static int nfs4_opendata_access(struct rpc_cred *cred,
1796 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1797 struct nfs4_state *state, fmode_t fmode,
1798 int openflags)
6168f62c
WAA		 1799{
1800 struct nfs_access_entry cache;
1801 u32 mask;
1802
1803 /* access call failed or for some reason the server doesn't
1804 * support any access modes -- defer access call until later */
1805 if (opendata->o_res.access_supported == 0)
1806 return 0;
1807
1808 mask = 0;
bbd3a8ee 1809 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1810 * write mode bits, but POSIX allows the creating process to write.
1811 * use openflags to check for exec, because fmode won't
1812 * always have FMODE_EXEC set when file open for exec. */
1813 if (openflags & __FMODE_EXEC) {
1814 /* ONLY check for exec rights */
1815 mask = MAY_EXEC;
1816 } else if (fmode & FMODE_READ)
1817 mask = MAY_READ;
6168f62c
WAA		 1818
1819 cache.cred = cred;
1820 cache.jiffies = jiffies;
1821 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1822 nfs_access_add_cache(state->inode, &cache);
1823
bbd3a8ee 1824 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1825 return 0;
1826
1827 /* even though OPEN succeeded, access is denied. Close the file */
1828 nfs4_close_state(state, fmode);
998f40b5 1829 return -EACCES;
6168f62c
WAA		 1830}
1831
b257957e
AB		 1832/*
1833 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1834 */
1835static int _nfs4_proc_open(struct nfs4_opendata *data)
1836{
1837 struct inode *dir = data->dir->d_inode;
1838 struct nfs_server *server = NFS_SERVER(dir);
1839 struct nfs_openargs *o_arg = &data->o_arg;
1840 struct nfs_openres *o_res = &data->o_res;
1841 int status;
1842
1843 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1844 if (!data->rpc_done)
1845 return status;
1846 if (status != 0) {
1847 if (status == -NFS4ERR_BADNAME &&
1848 !(o_arg->open_flags & O_CREAT))
1849 return -ENOENT;
24ac23ab 1850 return status;
08ef7bd3 1851 }
24ac23ab 1852
6926afd1
TM		 1853 nfs_fattr_map_and_free_names(server, &data->f_attr);
1854
90ff0c54 1855 if (o_arg->open_flags & O_CREAT)
56ae19f3 1856 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1857 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1858 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1859 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1860 status = _nfs4_proc_open_confirm(data);
1da177e4 1861 if (status != 0)
24ac23ab 1862 return status;
1da177e4
LT		 1863 }
1864 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1865 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1866 return 0;
1da177e4
LT		 1867}
1868
d83217c1
AA		 1869static int nfs4_recover_expired_lease(struct nfs_server *server)
1870{
1871 return nfs4_client_recover_expired_lease(server->nfs_client);
1872}
1873
1da177e4
LT		 1874/*
1875 * OPEN_EXPIRED:
1876 * reclaim state on the server after a network partition.
1877 * Assumes caller holds the appropriate lock
1878 */
539cd03a 1879static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1880{
e56e0b78 1881 struct nfs4_opendata *opendata;
864472e9 1882 int ret;
1da177e4 1883
4a1c0893 1884 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1885 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1886 if (IS_ERR(opendata))
1887 return PTR_ERR(opendata);
864472e9 1888 ret = nfs4_open_recover(opendata, state);
35d05778 1889 if (ret == -ESTALE)
3d4ff43d 1890 d_drop(ctx->dentry);
c6d00e63 1891 nfs4_opendata_put(opendata);
864472e9 1892 return ret;
1da177e4
LT		 1893}
1894
a9ed2e25 1895static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1896{
539cd03a 1897 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1898 struct nfs4_exception exception = { };
1899 int err;
1900
1901 do {
539cd03a 1902 err = _nfs4_open_expired(ctx, state);
42113a75 1903 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1904 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1905 continue;
a9ed2e25
TM		 1906 switch (err) {
1907 default:
1908 goto out;
1909 case -NFS4ERR_GRACE:
1910 case -NFS4ERR_DELAY:
1911 nfs4_handle_exception(server, err, &exception);
1912 err = 0;
1913 }
202b50dc 1914 } while (exception.retry);
a9ed2e25 1915out:
202b50dc
TM		 1916 return err;
1917}
1918
1da177e4
LT		 1919static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1920{
1da177e4 1921 struct nfs_open_context *ctx;
864472e9 1922 int ret;
1da177e4 1923
864472e9
TM		 1924 ctx = nfs4_state_find_open_context(state);
1925 if (IS_ERR(ctx))
91876b13 1926 return -EAGAIN;
539cd03a 1927 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1928 put_nfs_open_context(ctx);
1929 return ret;
1da177e4
LT		 1930}
1931
f062eb6c 1932#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1933static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1934{
f062eb6c 1935 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1936 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1937 struct nfs_delegation *delegation;
1938 struct rpc_cred *cred = NULL;
1939 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1940
1941 /* If a state reset has been done, test_stateid is unneeded */
1942 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1943 return;
1944
ab7cb0df
TM		 1945 /* Get the delegation credential for use by test/free_stateid */
1946 rcu_read_lock();
1947 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1948 if (delegation != NULL &&
1949 nfs4_stateid_match(&delegation->stateid, stateid)) {
1950 cred = get_rpccred(delegation->cred);
1951 rcu_read_unlock();
1952 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 1953 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 1954 } else
1955 rcu_read_unlock();
1956
3e60ffdd
CL		 1957 if (status != NFS_OK) {
1958 /* Free the stateid unless the server explicitly
1959 * informs us the stateid is unrecognized. */
1960 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1961 nfs41_free_stateid(server, stateid, cred);
6938867e 1962 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1963
6938867e
BS		 1964 write_seqlock(&state->seqlock);
1965 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1966 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1967 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1968 }
ab7cb0df
TM		 1969
1970 if (cred != NULL)
1971 put_rpccred(cred);
3e60ffdd
CL		 1972}
1973
1974/**
1975 * nfs41_check_open_stateid - possibly free an open stateid
1976 *
1977 * @state: NFSv4 state for an inode
1978 *
1979 * Returns NFS_OK if recovery for this stateid is now finished.
1980 * Otherwise a negative NFS4ERR value is returned.
1981 */
1982static int nfs41_check_open_stateid(struct nfs4_state *state)
1983{
1984 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1985 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 1986 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 1987 int status;
1988
1989 /* If a state reset has been done, test_stateid is unneeded */
1990 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1991 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1992 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1993 return -NFS4ERR_BAD_STATEID;
1994
ab7cb0df 1995 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 1996 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 1997 if (status != NFS_OK) {
1998 /* Free the stateid unless the server explicitly
1999 * informs us the stateid is unrecognized. */
2000 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2001 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2002
2003 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2004 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2005 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2006 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2007 }
2008 return status;
2009}
2010
2011static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2012{
eb64cf96 2013 int status;
b01dd1d8 2014
3e60ffdd
CL		 2015 nfs41_clear_delegation_stateid(state);
2016 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2017 if (status != NFS_OK)
2018 status = nfs4_open_expired(sp, state);
2019 return status;
f062eb6c
BS		 2020}
2021#endif
2022
aa53ed54
JL		 2023/*
2024 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2025 * fields corresponding to attributes that were used to store the verifier.
2026 * Make sure we clobber those fields in the later setattr call
2027 */
2028static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2029{
2030 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2031 !(sattr->ia_valid & ATTR_ATIME_SET))
2032 sattr->ia_valid |= ATTR_ATIME;
2033
2034 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2035 !(sattr->ia_valid & ATTR_MTIME_SET))
2036 sattr->ia_valid |= ATTR_MTIME;
2037}
2038
c21443c2
TM		 2039static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2040 fmode_t fmode,
2041 int flags,
3efb9722 2042 struct nfs_open_context *ctx)
c21443c2
TM		 2043{
2044 struct nfs4_state_owner *sp = opendata->owner;
2045 struct nfs_server *server = sp->so_server;
275bb307 2046 struct dentry *dentry;
c21443c2
TM		 2047 struct nfs4_state *state;
2048 unsigned int seq;
2049 int ret;
2050
2051 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2052
2053 ret = _nfs4_proc_open(opendata);
2054 if (ret != 0)
2055 goto out;
2056
2057 state = nfs4_opendata_to_nfs4_state(opendata);
2058 ret = PTR_ERR(state);
2059 if (IS_ERR(state))
2060 goto out;
2061 if (server->caps & NFS_CAP_POSIX_LOCK)
2062 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2063
275bb307
TM		 2064 dentry = opendata->dentry;
2065 if (dentry->d_inode == NULL) {
2066 /* FIXME: Is this d_drop() ever needed? */
2067 d_drop(dentry);
2068 dentry = d_add_unique(dentry, igrab(state->inode));
2069 if (dentry == NULL) {
2070 dentry = opendata->dentry;
2071 } else if (dentry != ctx->dentry) {
2072 dput(ctx->dentry);
2073 ctx->dentry = dget(dentry);
2074 }
2075 nfs_set_verifier(dentry,
2076 nfs_save_change_attribute(opendata->dir->d_inode));
2077 }
2078
c21443c2
TM		 2079 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2080 if (ret != 0)
2081 goto out;
2082
3efb9722 2083 ctx->state = state;
c45ffdd2
TM		 2084 if (dentry->d_inode == state->inode) {
2085 nfs_inode_attach_open_context(ctx);
2086 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2087 nfs4_schedule_stateid_recovery(server, state);
2088 }
c21443c2
TM		 2089out:
2090 return ret;
2091}
2092
1da177e4 2093/*
24ac23ab 2094 * Returns a referenced nfs4_state
1da177e4 2095 */
82be417a 2096static int _nfs4_do_open(struct inode *dir,
4197a055 2097 struct nfs_open_context *ctx,
82be417a
AA		 2098 int flags,
2099 struct iattr *sattr,
959d921f 2100 struct nfs4_label *label)
1da177e4
LT		 2101{
2102 struct nfs4_state_owner *sp;
2103 struct nfs4_state *state = NULL;
2104 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2105 struct nfs4_opendata *opendata;
4197a055
TM		 2106 struct dentry *dentry = ctx->dentry;
2107 struct rpc_cred *cred = ctx->cred;
2108 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2109 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2110 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2111 struct nfs4_label *olabel = NULL;
aac00a8d 2112 int status;
1da177e4
LT		 2113
2114 /* Protect against reboot recovery conflicts */
1da177e4 2115 status = -ENOMEM;
d1e284d5
TM		 2116 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2117 if (sp == NULL) {
1da177e4
LT		 2118 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2119 goto out_err;
2120 }
58d9714a
TM		 2121 status = nfs4_recover_expired_lease(server);
2122 if (status != 0)
b4454fe1 2123 goto err_put_state_owner;
82a2c1b7
AV		 2124 if (dentry->d_inode != NULL)
2125 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2126 status = -ENOMEM;
49f9a0fa
TM		 2127 if (dentry->d_inode)
2128 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2129 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2130 label, claim, GFP_KERNEL);
e56e0b78 2131 if (opendata == NULL)
95d35cb4 2132 goto err_put_state_owner;
1da177e4 2133
14c43f76
DQ		 2134 if (label) {
2135 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2136 if (IS_ERR(olabel)) {
2137 status = PTR_ERR(olabel);
2138 goto err_opendata_put;
2139 }
2140 }
2141
82be417a
AA		 2142 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2143 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2144 if (!opendata->f_attr.mdsthreshold)
14c43f76 2145 goto err_free_label;
1549210f 2146 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2147 }
82a2c1b7
AV		 2148 if (dentry->d_inode != NULL)
2149 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2150
3efb9722 2151 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2152 if (status != 0)
14c43f76 2153 goto err_free_label;
3efb9722 2154 state = ctx->state;
6168f62c 2155
549b19cc
TM		 2156 if ((opendata->o_arg.open_flags & O_EXCL) &&
2157 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2158 nfs4_exclusive_attrset(opendata, sattr);
2159
2160 nfs_fattr_init(opendata->o_res.f_attr);
2161 status = nfs4_do_setattr(state->inode, cred,
2162 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2163 state, label, olabel);
2164 if (status == 0) {
0ab64e0e 2165 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2166 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2167 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2168 }
0ab64e0e 2169 }
82be417a
AA		 2170
2171 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2172 *ctx_th = opendata->f_attr.mdsthreshold;
2173 else
2174 kfree(opendata->f_attr.mdsthreshold);
2175 opendata->f_attr.mdsthreshold = NULL;
2176
14c43f76
DQ		 2177 nfs4_label_free(olabel);
2178
c6d00e63 2179 nfs4_opendata_put(opendata);
1da177e4 2180 nfs4_put_state_owner(sp);
1da177e4 2181 return 0;
14c43f76
DQ		 2182err_free_label:
2183 nfs4_label_free(olabel);
c6d00e63 2184err_opendata_put:
82be417a 2185 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2186 nfs4_opendata_put(opendata);
e56e0b78
TM		 2187err_put_state_owner:
2188 nfs4_put_state_owner(sp);
1da177e4 2189out_err:
1da177e4
LT		 2190 return status;
2191}
2192
2193
82be417a 2194static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2195 struct nfs_open_context *ctx,
82be417a
AA		 2196 int flags,
2197 struct iattr *sattr,
959d921f 2198 struct nfs4_label *label)
1da177e4 2199{
49f9a0fa 2200 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2201 struct nfs4_exception exception = { };
2202 struct nfs4_state *res;
2203 int status;
2204
2205 do {
959d921f 2206 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2207 res = ctx->state;
42113a75 2208 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2209 if (status == 0)
2210 break;
2211 /* NOTE: BAD_SEQID means the server and client disagree about the
2212 * book-keeping w.r.t. state-changing operations
2213 * (OPEN/CLOSE/LOCK/LOCKU...)
2214 * It is actually a sign of a bug on the client or on the server.
2215 *
2216 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2217 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2218 * have unhashed the old state_owner for us, and that we can
2219 * therefore safely retry using a new one. We should still warn
2220 * the user though...
2221 */
2222 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2223 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2224 " returned a bad sequence-id error!\n",
2225 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2226 exception.retry = 1;
2227 continue;
2228 }
550f5747
TM		 2229 /*
2230 * BAD_STATEID on OPEN means that the server cancelled our
2231 * state before it received the OPEN_CONFIRM.
2232 * Recover by retrying the request as per the discussion
2233 * on Page 181 of RFC3530.
2234 */
2235 if (status == -NFS4ERR_BAD_STATEID) {
2236 exception.retry = 1;
2237 continue;
2238 }
aac00a8d
TM		 2239 if (status == -EAGAIN) {
2240 /* We must have found a delegation */
2241 exception.retry = 1;
2242 continue;
2243 }
49f9a0fa
TM		 2244 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2245 continue;
2246 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2247 status, &exception));
2248 } while (exception.retry);
2249 return res;
2250}
2251
659bfcd6
TM		 2252static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2253 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2254 struct nfs4_state *state, struct nfs4_label *ilabel,
2255 struct nfs4_label *olabel)
1da177e4 2256{
3e4f6290 2257 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2258 struct nfs_setattrargs arg = {
3e4f6290 2259 .fh = NFS_FH(inode),
1da177e4
LT		 2260 .iap = sattr,
2261 .server = server,
2262 .bitmask = server->attr_bitmask,
1775fd3e 2263 .label = ilabel,
1da177e4
LT		 2264 };
2265 struct nfs_setattrres res = {
2266 .fattr = fattr,
1775fd3e 2267 .label = olabel,
1da177e4
LT		 2268 .server = server,
2269 };
2270 struct rpc_message msg = {
659bfcd6
TM		 2271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2272 .rpc_argp = &arg,
2273 .rpc_resp = &res,
2274 .rpc_cred = cred,
1da177e4 2275 };
26e976a8 2276 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2277 fmode_t fmode;
2278 bool truncate;
65e4308d 2279 int status;
1da177e4 2280
aa9c2669
DQ		 2281 arg.bitmask = nfs4_bitmask(server, ilabel);
2282 if (ilabel)
2283 arg.bitmask = nfs4_bitmask(server, olabel);
2284
0e574af1 2285 nfs_fattr_init(fattr);
1da177e4 2286
ee3ae84e
TM		 2287 /* Servers should only apply open mode checks for file size changes */
2288 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2289 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2290
2291 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2292 /* Use that stateid */
2293 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2294 struct nfs_lockowner lockowner = {
2295 .l_owner = current->files,
2296 .l_pid = current->tgid,
2297 };
4fc8796d 2298 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2299 &lockowner);
08e9eac4 2300 } else
f597c537 2301 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2302
7c513058 2303 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2304 if (status == 0 && state != NULL)
2305 renew_lease(server, timestamp);
65e4308d 2306 return status;
1da177e4
LT		 2307}
2308
659bfcd6
TM		 2309static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2310 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2311 struct nfs4_state *state, struct nfs4_label *ilabel,
2312 struct nfs4_label *olabel)
1da177e4 2313{
3e4f6290 2314 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2315 struct nfs4_exception exception = {
2316 .state = state,
3114ea7a 2317 .inode = inode,
a1d0b5ee 2318 };
1da177e4
LT		 2319 int err;
2320 do {
1775fd3e 2321 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2322 trace_nfs4_setattr(inode, err);
451146be
TM		 2323 switch (err) {
2324 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2325 if (!(sattr->ia_valid & ATTR_SIZE)) {
2326 pr_warn_once("NFSv4: server %s is incorrectly "
2327 "applying open mode checks to "
2328 "a SETATTR that is not "
2329 "changing file size.\n",
2330 server->nfs_client->cl_hostname);
2331 }
451146be
TM		 2332 if (state && !(state->state & FMODE_WRITE)) {
2333 err = -EBADF;
2334 if (sattr->ia_valid & ATTR_OPEN)
2335 err = -EACCES;
2336 goto out;
2337 }
2338 }
2339 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2340 } while (exception.retry);
451146be 2341out:
1da177e4
LT		 2342 return err;
2343}
2344
2345struct nfs4_closedata {
2346 struct inode *inode;
2347 struct nfs4_state *state;
2348 struct nfs_closeargs arg;
2349 struct nfs_closeres res;
516a6af6 2350 struct nfs_fattr fattr;
26e976a8 2351 unsigned long timestamp;
f7e8917a
FI		 2352 bool roc;
2353 u32 roc_barrier;
1da177e4
LT		 2354};
2355
963d8fe5 2356static void nfs4_free_closedata(void *data)
9512135d 2357{
963d8fe5
TM		 2358 struct nfs4_closedata *calldata = data;
2359 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2360 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2361
f7e8917a
FI		 2362 if (calldata->roc)
2363 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2364 nfs4_put_open_state(calldata->state);
2365 nfs_free_seqid(calldata->arg.seqid);
9512135d 2366 nfs4_put_state_owner(sp);
322b2b90 2367 nfs_sb_deactive(sb);
9512135d
TM		 2368 kfree(calldata);
2369}
2370
88069f77
TM		 2371static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2372 fmode_t fmode)
2373{
2374 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2375 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2376 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2377 case FMODE_WRITE:
88069f77 2378 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2379 break;
2380 case FMODE_READ:
88069f77 2381 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2382 break;
2383 case 0:
2384 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2385 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2386 clear_bit(NFS_OPEN_STATE, &state->flags);
2387 }
88069f77
TM		 2388 spin_unlock(&state->owner->so_lock);
2389}
2390
963d8fe5 2391static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2392{
963d8fe5 2393 struct nfs4_closedata *calldata = data;
1da177e4 2394 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2395 struct nfs_server *server = NFS_SERVER(calldata->inode);
2396
a3ca5651 2397 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2398 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2399 return;
42113a75 2400 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2401 /* hmm. we are done with the inode, and in the process of freeing
2402 * the state_owner. we keep this around to process errors
2403 */
1da177e4
LT		 2404 switch (task->tk_status) {
2405 case 0:
f7e8917a
FI		 2406 if (calldata->roc)
2407 pnfs_roc_set_barrier(state->inode,
2408 calldata->roc_barrier);
45328c35 2409 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2410 renew_lease(server, calldata->timestamp);
88069f77
TM		 2411 nfs4_close_clear_stateid_flags(state,
2412 calldata->arg.fmode);
1da177e4
LT		 2413 break;
2414 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2415 case -NFS4ERR_OLD_STATEID:
2416 case -NFS4ERR_BAD_STATEID:
1da177e4 2417 case -NFS4ERR_EXPIRED:
dc0b027d 2418 if (calldata->arg.fmode == 0)
9e33bed5 2419 break;
1da177e4 2420 default:
72211dbe
TM		 2421 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2422 rpc_restart_call_prepare(task);
1da177e4 2423 }
72211dbe 2424 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2425 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2426 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2427}
2428
4ce70ada 2429static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2430{
4ce70ada 2431 struct nfs4_closedata *calldata = data;
9512135d 2432 struct nfs4_state *state = calldata->state;
7fdab069 2433 struct inode *inode = calldata->inode;
88069f77 2434 int call_close = 0;
9512135d 2435
a3ca5651 2436 dprintk("%s: begin!\n", __func__);
963d8fe5 2437 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2438 goto out_wait;
003707c7 2439
88069f77
TM		 2440 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2441 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2442 spin_lock(&state->owner->so_lock);
003707c7 2443 /* Calculate the change in open mode */
e7616923 2444 if (state->n_rdwr == 0) {
003707c7 2445 if (state->n_rdonly == 0) {
88069f77
TM		 2446 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2447 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2448 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2449 }
2450 if (state->n_wronly == 0) {
88069f77
TM		 2451 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2452 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2453 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2454 }
e7616923 2455 }
5d422301
TM		 2456 if (!nfs4_valid_open_stateid(state))
2457 call_close = 0;
4cecb76f 2458 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2459
2460 if (!call_close) {
963d8fe5 2461 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2462 goto out_no_action;
9512135d 2463 }
88069f77 2464
f7e8917a 2465 if (calldata->arg.fmode == 0) {
88069f77 2466 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2467 if (calldata->roc &&
b9536ad5
AA		 2468 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2469 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2470 goto out_wait;
b9536ad5 2471 }
f7e8917a 2472 }
88069f77 2473
516a6af6 2474 nfs_fattr_init(calldata->res.fattr);
26e976a8 2475 calldata->timestamp = jiffies;
7fdab069 2476 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2477 &calldata->arg.seq_args,
2478 &calldata->res.seq_res,
2240a9e2
TM		 2479 task) != 0)
2480 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2481 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2482 return;
2483out_no_action:
2484 task->tk_action = NULL;
2485out_wait:
2486 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2487}
2488
963d8fe5 2489static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2490 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2491 .rpc_call_done = nfs4_close_done,
2492 .rpc_release = nfs4_free_closedata,
2493};
2494
1da177e4
LT		 2495/*
2496 * It is possible for data to be read/written from a mem-mapped file
2497 * after the sys_close call (which hits the vfs layer as a flush).
2498 * This means that we can't safely call nfsv4 close on a file until
2499 * the inode is cleared. This in turn means that we are not good
2500 * NFSv4 citizens - we do not indicate to the server to update the file's
2501 * share state even when we are done with one of the three share
2502 * stateid's in the inode.
2503 *
2504 * NOTE: Caller must be holding the sp->so_owner semaphore!
2505 */
1f7977c1 2506int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2507{
4a35bd41 2508 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2509 struct nfs4_closedata *calldata;
b39e625b
TM		 2510 struct nfs4_state_owner *sp = state->owner;
2511 struct rpc_task *task;
5138fde0
TM		 2512 struct rpc_message msg = {
2513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2514 .rpc_cred = state->owner->so_cred,
2515 };
c970aa85
TM		 2516 struct rpc_task_setup task_setup_data = {
2517 .rpc_client = server->client,
5138fde0 2518 .rpc_message = &msg,
c970aa85 2519 .callback_ops = &nfs4_close_ops,
101070ca 2520 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2521 .flags = RPC_TASK_ASYNC,
2522 };
9512135d 2523 int status = -ENOMEM;
1da177e4 2524
8535b2be 2525 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2526 if (calldata == NULL)
9512135d 2527 goto out;
9d12b216 2528 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2529 calldata->inode = state->inode;
1da177e4 2530 calldata->state = state;
4a35bd41 2531 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2532 calldata->arg.stateid = &state->open_stateid;
1da177e4 2533 /* Serialization for the sequence id */
8535b2be 2534 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2535 if (calldata->arg.seqid == NULL)
2536 goto out_free_calldata;
dc0b027d 2537 calldata->arg.fmode = 0;
a65318bf 2538 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2539 calldata->res.fattr = &calldata->fattr;
c1d51931 2540 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2541 calldata->res.server = server;
1f7977c1 2542 calldata->roc = pnfs_roc(state->inode);
643168c2 2543 nfs_sb_active(calldata->inode->i_sb);
9512135d 2544
1174dd1f
TM		 2545 msg.rpc_argp = &calldata->arg;
2546 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2547 task_setup_data.callback_data = calldata;
2548 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2549 if (IS_ERR(task))
2550 return PTR_ERR(task);
a49c3c77
TM		 2551 status = 0;
2552 if (wait)
2553 status = rpc_wait_for_completion_task(task);
b39e625b 2554 rpc_put_task(task);
a49c3c77 2555 return status;
9512135d
TM		 2556out_free_calldata:
2557 kfree(calldata);
2558out:
b39e625b
TM		 2559 nfs4_put_open_state(state);
2560 nfs4_put_state_owner(sp);
9512135d 2561 return status;
1da177e4
LT		 2562}
2563
2b484297 2564static struct inode *
cd9a1c0e 2565nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2566{
1da177e4 2567 struct nfs4_state *state;
aa9c2669
DQ		 2568 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2569
2570 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2571
565277f6 2572 /* Protect against concurrent sillydeletes */
959d921f 2573 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2574
2575 nfs4_label_release_security(label);
2576
f46e0bd3
TM		 2577 if (IS_ERR(state))
2578 return ERR_CAST(state);
275bb307 2579 return state->inode;
1da177e4
LT		 2580}
2581
1185a552 2582static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2583{
2584 if (ctx->state == NULL)
2585 return;
2586 if (is_sync)
643168c2 2587 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2588 else
643168c2 2589 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2590}
1da177e4
LT		 2591
2592static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2593{
43652ad5
BH		 2594 struct nfs4_server_caps_arg args = {
2595 .fhandle = fhandle,
2596 };
1da177e4
LT		 2597 struct nfs4_server_caps_res res = {};
2598 struct rpc_message msg = {
2599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2600 .rpc_argp = &args,
1da177e4
LT		 2601 .rpc_resp = &res,
2602 };
2603 int status;
2604
7c513058 2605 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2606 if (status == 0) {
2607 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2608 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2609 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2610 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2611 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2612 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2613 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2614 server->caps |= NFS_CAP_ACLS;
2615 if (res.has_links != 0)
2616 server->caps |= NFS_CAP_HARDLINKS;
2617 if (res.has_symlinks != 0)
2618 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2619 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2620 server->caps |= NFS_CAP_FILEID;
2621 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2622 server->caps |= NFS_CAP_MODE;
2623 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2624 server->caps |= NFS_CAP_NLINK;
2625 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2626 server->caps |= NFS_CAP_OWNER;
2627 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2628 server->caps |= NFS_CAP_OWNER_GROUP;
2629 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2630 server->caps |= NFS_CAP_ATIME;
2631 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2632 server->caps |= NFS_CAP_CTIME;
2633 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2634 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2635#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2636 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2637 server->caps |= NFS_CAP_SECURITY_LABEL;
2638#endif
2639 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2640 sizeof(server->attr_bitmask));
62ab460c 2641
aa9c2669
DQ		 2642 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2643 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2644 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2645 }
a65318bf
TM		 2646 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2647 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2648 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2649 server->acl_bitmask = res.acl_bitmask;
264e6351 2650 server->fh_expire_type = res.fh_expire_type;
1da177e4 2651 }
cccef3b9 2652
1da177e4
LT		 2653 return status;
2654}
2655
55a97593 2656int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2657{
2658 struct nfs4_exception exception = { };
2659 int err;
2660 do {
2661 err = nfs4_handle_exception(server,
2662 _nfs4_server_capabilities(server, fhandle),
2663 &exception);
2664 } while (exception.retry);
2665 return err;
2666}
2667
2668static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2669 struct nfs_fsinfo *info)
2670{
aa9c2669 2671 u32 bitmask[3];
1da177e4 2672 struct nfs4_lookup_root_arg args = {
aa9c2669 2673 .bitmask = bitmask,
1da177e4
LT		 2674 };
2675 struct nfs4_lookup_res res = {
2676 .server = server,
0e574af1 2677 .fattr = info->fattr,
1da177e4
LT		 2678 .fh = fhandle,
2679 };
2680 struct rpc_message msg = {
2681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2682 .rpc_argp = &args,
2683 .rpc_resp = &res,
2684 };
008f55d0 2685
aa9c2669
DQ		 2686 bitmask[0] = nfs4_fattr_bitmap[0];
2687 bitmask[1] = nfs4_fattr_bitmap[1];
2688 /*
2689 * Process the label in the upcoming getfattr
2690 */
2691 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2692
0e574af1 2693 nfs_fattr_init(info->fattr);
7c513058 2694 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2695}
2696
2697static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2698 struct nfs_fsinfo *info)
2699{
2700 struct nfs4_exception exception = { };
2701 int err;
2702 do {
fb8a5ba8 2703 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2704 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2705 switch (err) {
2706 case 0:
2707 case -NFS4ERR_WRONGSEC:
05e9cfb4 2708 goto out;
fb8a5ba8
BS		 2709 default:
2710 err = nfs4_handle_exception(server, err, &exception);
2711 }
1da177e4 2712 } while (exception.retry);
05e9cfb4 2713out:
1da177e4
LT		 2714 return err;
2715}
2716
8f70e95f
BS		 2717static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2718 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2719{
2720 struct rpc_auth *auth;
2721 int ret;
2722
2723 auth = rpcauth_create(flavor, server->client);
e8d920c5 2724 if (IS_ERR(auth)) {
75bc8821 2725 ret = -EACCES;
8f70e95f
BS		 2726 goto out;
2727 }
2728 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2729out:
2730 return ret;
2731}
2732
9a744ba3
CL		 2733/*
2734 * Retry pseudoroot lookup with various security flavors. We do this when:
2735 *
2736 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2737 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2738 *
2739 * Returns zero on success, or a negative NFS4ERR value, or a
2740 * negative errno value.
2741 */
801a16dc 2742static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2743 struct nfs_fsinfo *info)
1da177e4 2744{
9a744ba3
CL		 2745 /* Per 3530bis 15.33.5 */
2746 static const rpc_authflavor_t flav_array[] = {
2747 RPC_AUTH_GSS_KRB5P,
2748 RPC_AUTH_GSS_KRB5I,
2749 RPC_AUTH_GSS_KRB5,
c4eafe11 2750 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2751 RPC_AUTH_NULL,
2752 };
2753 int status = -EPERM;
2754 size_t i;
6a1a1e34 2755
9a744ba3 2756 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2757 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2758 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2759 continue;
2760 break;
8f70e95f 2761 }
9a744ba3 2762
fb8a5ba8
BS		 2763 /*
2764 * -EACCESS could mean that the user doesn't have correct permissions
2765 * to access the mount. It could also mean that we tried to mount
2766 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2767 * existing mount programs don't handle -EACCES very well so it should
2768 * be mapped to -EPERM instead.
2769 */
2770 if (status == -EACCES)
2771 status = -EPERM;
801a16dc
BS		 2772 return status;
2773}
2774
2ed4b95b
CL		 2775static int nfs4_do_find_root_sec(struct nfs_server *server,
2776 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2777{
2778 int mv = server->nfs_client->cl_minorversion;
2779 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2780}
2781
2782/**
2783 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2784 * @server: initialized nfs_server handle
2785 * @fhandle: we fill in the pseudo-fs root file handle
2786 * @info: we fill in an FSINFO struct
2787 *
2788 * Returns zero on success, or a negative errno.
801a16dc 2789 */
3028eb2b
BS		 2790int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2791 struct nfs_fsinfo *info)
801a16dc 2792{
2ed4b95b
CL		 2793 int status;
2794
2795 status = nfs4_lookup_root(server, fhandle, info);
2796 if ((status == -NFS4ERR_WRONGSEC) &&
2797 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2798 status = nfs4_do_find_root_sec(server, fhandle, info);
2799
1da177e4
LT		 2800 if (status == 0)
2801 status = nfs4_server_capabilities(server, fhandle);
2802 if (status == 0)
2803 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2804
c12e87f4 2805 return nfs4_map_errors(status);
1da177e4
LT		 2806}
2807
bae36241
BS		 2808static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2809 struct nfs_fsinfo *info)
2810{
2811 int error;
2812 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2813 struct nfs4_label *label = NULL;
bae36241
BS		 2814
2815 error = nfs4_server_capabilities(server, mntfh);
2816 if (error < 0) {
2817 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2818 return error;
2819 }
2820
14c43f76
DQ		 2821 label = nfs4_label_alloc(server, GFP_KERNEL);
2822 if (IS_ERR(label))
2823 return PTR_ERR(label);
2824
1775fd3e 2825 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2826 if (error < 0) {
2827 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2828 goto err_free_label;
bae36241
BS		 2829 }
2830
2831 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2832 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2833 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2834
14c43f76
DQ		 2835err_free_label:
2836 nfs4_label_free(label);
2837
bae36241
BS		 2838 return error;
2839}
2840
6b97fd3d
MN		 2841/*
2842 * Get locations and (maybe) other attributes of a referral.
2843 * Note that we'll actually follow the referral later when
2844 * we detect fsid mismatch in inode revalidation
2845 */
f05d147f
BS		 2846static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2847 const struct qstr *name, struct nfs_fattr *fattr,
2848 struct nfs_fh *fhandle)
6b97fd3d
MN		 2849{
2850 int status = -ENOMEM;
2851 struct page *page = NULL;
2852 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2853
2854 page = alloc_page(GFP_KERNEL);
2855 if (page == NULL)
2856 goto out;
2857 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2858 if (locations == NULL)
2859 goto out;
2860
f05d147f 2861 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2862 if (status != 0)
2863 goto out;
2864 /* Make sure server returned a different fsid for the referral */
2865 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2866 dprintk("%s: server did not return a different fsid for"
2867 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2868 status = -EIO;
2869 goto out;
2870 }
533eb461
AA		 2871 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2872 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2873
533eb461 2874 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2875 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2876 memset(fhandle, 0, sizeof(struct nfs_fh));
2877out:
2878 if (page)
2879 __free_page(page);
5d7ca35a 2880 kfree(locations);
6b97fd3d
MN		 2881 return status;
2882}
2883
1775fd3e
DQ		 2884static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2885 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2886{
2887 struct nfs4_getattr_arg args = {
2888 .fh = fhandle,
2889 .bitmask = server->attr_bitmask,
2890 };
2891 struct nfs4_getattr_res res = {
2892 .fattr = fattr,
1775fd3e 2893 .label = label,
1da177e4
LT		 2894 .server = server,
2895 };
2896 struct rpc_message msg = {
2897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2898 .rpc_argp = &args,
2899 .rpc_resp = &res,
2900 };
aa9c2669
DQ		 2901
2902 args.bitmask = nfs4_bitmask(server, label);
2903
0e574af1 2904 nfs_fattr_init(fattr);
7c513058 2905 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2906}
2907
1775fd3e
DQ		 2908static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2909 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2910{
2911 struct nfs4_exception exception = { };
2912 int err;
2913 do {
b5f875a9
TM		 2914 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
2915 trace_nfs4_getattr(server, fhandle, fattr, err);
2916 err = nfs4_handle_exception(server, err,
1da177e4
LT		 2917 &exception);
2918 } while (exception.retry);
2919 return err;
2920}
2921
2922/*
2923 * The file is not closed if it is opened due to the a request to change
2924 * the size of the file. The open call will not be needed once the
2925 * VFS layer lookup-intents are implemented.
2926 *
2927 * Close is called when the inode is destroyed.
2928 * If we haven't opened the file for O_WRONLY, we
2929 * need to in the size_change case to obtain a stateid.
2930 *
2931 * Got race?
2932 * Because OPEN is always done by name in nfsv4, it is
2933 * possible that we opened a different file by the same
2934 * name. We can recognize this race condition, but we
2935 * can't do anything about it besides returning an error.
2936 *
2937 * This will be fixed with VFS changes (lookup-intent).
2938 */
2939static int
2940nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2941 struct iattr *sattr)
2942{
08e9eac4 2943 struct inode *inode = dentry->d_inode;
659bfcd6 2944 struct rpc_cred *cred = NULL;
d530838b 2945 struct nfs4_state *state = NULL;
14c43f76 2946 struct nfs4_label *label = NULL;
1da177e4
LT		 2947 int status;
2948
8a1636c4 2949 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2950 pnfs_commit_and_return_layout(inode);
8a1636c4 2951
0e574af1 2952 nfs_fattr_init(fattr);
1da177e4 2953
2669940d
AA		 2954 /* Deal with open(O_TRUNC) */
2955 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2956 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2957
2958 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2959 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2960 return 0;
2961
d530838b 2962 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2963 if (sattr->ia_valid & ATTR_FILE) {
2964 struct nfs_open_context *ctx;
2965
2966 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2967 if (ctx) {
2968 cred = ctx->cred;
2969 state = ctx->state;
2970 }
659bfcd6 2971 }
08e9eac4 2972
14c43f76
DQ		 2973 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2974 if (IS_ERR(label))
2975 return PTR_ERR(label);
2976
2977 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2978 if (status == 0) {
65e4308d 2979 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2980 nfs_setsecurity(inode, fattr, label);
2981 }
14c43f76 2982 nfs4_label_free(label);
1da177e4
LT		 2983 return status;
2984}
2985
0c2e53f1
TM		 2986static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2987 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 2988 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 2989{
0c2e53f1 2990 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2991 int status;
2992 struct nfs4_lookup_arg args = {
2993 .bitmask = server->attr_bitmask,
0c2e53f1 2994 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2995 .name = name,
2996 };
2997 struct nfs4_lookup_res res = {
2998 .server = server,
2999 .fattr = fattr,
aa9c2669 3000 .label = label,
2b3de441
DH		 3001 .fh = fhandle,
3002 };
3003 struct rpc_message msg = {
3004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3005 .rpc_argp = &args,
3006 .rpc_resp = &res,
3007 };
3008
aa9c2669
DQ		 3009 args.bitmask = nfs4_bitmask(server, label);
3010
2b3de441
DH		 3011 nfs_fattr_init(fattr);
3012
1da177e4 3013 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3014 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3015 dprintk("NFS reply lookup: %d\n", status);
3016 return status;
3017}
3018
72de53ec 3019static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3020{
7ebb9315 3021 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3022 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3023 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3024 fattr->nlink = 2;
3025}
3026
72de53ec
BS		 3027static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3028 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3029 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3030{
3031 struct nfs4_exception exception = { };
72de53ec 3032 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3033 int err;
3034 do {
1775fd3e 3035 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3036 trace_nfs4_lookup(dir, name, err);
72de53ec 3037 switch (err) {
08ef7bd3 3038 case -NFS4ERR_BADNAME:
72de53ec
BS		 3039 err = -ENOENT;
3040 goto out;
0c2e53f1 3041 case -NFS4ERR_MOVED:
f05d147f 3042 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3043 goto out;
0c2e53f1 3044 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3045 err = -EPERM;
3046 if (client != *clnt)
3047 goto out;
3048
3049 client = nfs4_create_sec_client(client, dir, name);
3050 if (IS_ERR(client))
3051 return PTR_ERR(client);
3052
3053 exception.retry = 1;
3054 break;
3055 default:
3056 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3057 }
1da177e4 3058 } while (exception.retry);
72de53ec
BS		 3059
3060out:
3061 if (err == 0)
3062 *clnt = client;
3063 else if (client != *clnt)
3064 rpc_shutdown_client(client);
3065
1da177e4
LT		 3066 return err;
3067}
3068
80a16b21 3069static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3070 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3071 struct nfs4_label *label)
72de53ec
BS		 3072{
3073 int status;
3074 struct rpc_clnt *client = NFS_CLIENT(dir);
3075
1775fd3e 3076 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3077 if (client != NFS_CLIENT(dir)) {
3078 rpc_shutdown_client(client);
3079 nfs_fixup_secinfo_attributes(fattr);
3080 }
3081 return status;
3082}
3083
f05d147f
BS		 3084struct rpc_clnt *
3085nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3086 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3087{
3088 int status;
3089 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3090
1775fd3e 3091 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3092 if (status < 0) {
3093 rpc_shutdown_client(client);
3094 return ERR_PTR(status);
3095 }
3096 return client;
3097}
3098
1da177e4
LT		 3099static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3100{
76b32999 3101 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3102 struct nfs4_accessargs args = {
3103 .fh = NFS_FH(inode),
a4980e78 3104 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3105 };
3106 struct nfs4_accessres res = {
3107 .server = server,
1da177e4 3108 };
1da177e4
LT		 3109 struct rpc_message msg = {
3110 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3111 .rpc_argp = &args,
3112 .rpc_resp = &res,
3113 .rpc_cred = entry->cred,
3114 };
3115 int mode = entry->mask;
aa9c2669 3116 int status = 0;
1da177e4
LT		 3117
3118 /*
3119 * Determine which access bits we want to ask for...
3120 */
3121 if (mode & MAY_READ)
3122 args.access |= NFS4_ACCESS_READ;
3123 if (S_ISDIR(inode->i_mode)) {
3124 if (mode & MAY_WRITE)
3125 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3126 if (mode & MAY_EXEC)
3127 args.access |= NFS4_ACCESS_LOOKUP;
3128 } else {
3129 if (mode & MAY_WRITE)
3130 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3131 if (mode & MAY_EXEC)
3132 args.access |= NFS4_ACCESS_EXECUTE;
3133 }
c407d41a
TM		 3134
3135 res.fattr = nfs_alloc_fattr();
3136 if (res.fattr == NULL)
3137 return -ENOMEM;
3138
7c513058 3139 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3140 if (!status) {
6168f62c 3141 nfs_access_set_mask(entry, res.access);
c407d41a 3142 nfs_refresh_inode(inode, res.fattr);
1da177e4 3143 }
c407d41a 3144 nfs_free_fattr(res.fattr);
1da177e4
LT		 3145 return status;
3146}
3147
3148static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3149{
3150 struct nfs4_exception exception = { };
3151 int err;
3152 do {
c1578b76
TM		 3153 err = _nfs4_proc_access(inode, entry);
3154 trace_nfs4_access(inode, err);
3155 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3156 &exception);
3157 } while (exception.retry);
3158 return err;
3159}
3160
3161/*
3162 * TODO: For the time being, we don't try to get any attributes
3163 * along with any of the zero-copy operations READ, READDIR,
3164 * READLINK, WRITE.
3165 *
3166 * In the case of the first three, we want to put the GETATTR
3167 * after the read-type operation -- this is because it is hard
3168 * to predict the length of a GETATTR response in v4, and thus
3169 * align the READ data correctly. This means that the GETATTR
3170 * may end up partially falling into the page cache, and we should
3171 * shift it into the 'tail' of the xdr_buf before processing.
3172 * To do this efficiently, we need to know the total length
3173 * of data received, which doesn't seem to be available outside
3174 * of the RPC layer.
3175 *
3176 * In the case of WRITE, we also want to put the GETATTR after
3177 * the operation -- in this case because we want to make sure
140150db 3178 * we get the post-operation mtime and size.
1da177e4
LT		 3179 *
3180 * Both of these changes to the XDR layer would in fact be quite
3181 * minor, but I decided to leave them for a subsequent patch.
3182 */
3183static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3184 unsigned int pgbase, unsigned int pglen)
3185{
3186 struct nfs4_readlink args = {
3187 .fh = NFS_FH(inode),
3188 .pgbase = pgbase,
3189 .pglen = pglen,
3190 .pages = &page,
3191 };
f50c7000 3192 struct nfs4_readlink_res res;
1da177e4
LT		 3193 struct rpc_message msg = {
3194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3195 .rpc_argp = &args,
f50c7000 3196 .rpc_resp = &res,
1da177e4
LT		 3197 };
3198
7c513058 3199 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3200}
3201
3202static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3203 unsigned int pgbase, unsigned int pglen)
3204{
3205 struct nfs4_exception exception = { };
3206 int err;
3207 do {
c1578b76
TM		 3208 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3209 trace_nfs4_readlink(inode, err);
3210 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3211 &exception);
3212 } while (exception.retry);
3213 return err;
3214}
3215
1da177e4 3216/*
8867fe58 3217 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3218 */
1da177e4
LT		 3219static int
3220nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3221 int flags)
1da177e4 3222{
aa9c2669 3223 struct nfs4_label l, *ilabel = NULL;
8867fe58 3224 struct nfs_open_context *ctx;
1da177e4 3225 struct nfs4_state *state;
1da177e4
LT		 3226 int status = 0;
3227
8867fe58
MS		 3228 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3229 if (IS_ERR(ctx))
3230 return PTR_ERR(ctx);
3231
aa9c2669
DQ		 3232 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3233
a8a5da99 3234 sattr->ia_mode &= ~current_umask();
959d921f 3235 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3236 if (IS_ERR(state)) {
3237 status = PTR_ERR(state);
c0204fd2 3238 goto out;
1da177e4 3239 }
1da177e4 3240out:
aa9c2669 3241 nfs4_label_release_security(ilabel);
8867fe58 3242 put_nfs_open_context(ctx);
1da177e4
LT		 3243 return status;
3244}
3245
3246static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3247{
16e42959 3248 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3249 struct nfs_removeargs args = {
1da177e4 3250 .fh = NFS_FH(dir),
26fe5750 3251 .name = *name,
16e42959 3252 };
4fdc17b2 3253 struct nfs_removeres res = {
16e42959 3254 .server = server,
1da177e4 3255 };
1da177e4 3256 struct rpc_message msg = {
4fdc17b2
TM		 3257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3258 .rpc_argp = &args,
3259 .rpc_resp = &res,
1da177e4 3260 };
778d2817 3261 int status;
1da177e4 3262
7c513058 3263 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3264 if (status == 0)
16e42959 3265 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3266 return status;
3267}
3268
3269static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3270{
3271 struct nfs4_exception exception = { };
3272 int err;
3273 do {
078ea3df
TM		 3274 err = _nfs4_proc_remove(dir, name);
3275 trace_nfs4_remove(dir, name, err);
3276 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3277 &exception);
3278 } while (exception.retry);
3279 return err;
3280}
3281
e4eff1a6 3282static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3283{
e4eff1a6
TM		 3284 struct nfs_server *server = NFS_SERVER(dir);
3285 struct nfs_removeargs *args = msg->rpc_argp;
3286 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3287
e4eff1a6 3288 res->server = server;
1da177e4 3289 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3290 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3291
3292 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3293}
3294
34e137cc
BS		 3295static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3296{
d9afbd1b
TM		 3297 nfs4_setup_sequence(NFS_SERVER(data->dir),
3298 &data->args.seq_args,
3299 &data->res.seq_res,
3300 task);
1da177e4
LT		 3301}
3302
e4eff1a6 3303static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3304{
078ea3df
TM		 3305 struct nfs_unlinkdata *data = task->tk_calldata;
3306 struct nfs_removeres *res = &data->res;
e4eff1a6 3307
14516c3a
TM		 3308 if (!nfs4_sequence_done(task, &res->seq_res))
3309 return 0;
9e33bed5 3310 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3311 return 0;
3312 update_changeattr(dir, &res->cinfo);
e4eff1a6 3313 return 1;
1da177e4
LT		 3314}
3315
d3d4152a
JL		 3316static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3317{
3318 struct nfs_server *server = NFS_SERVER(dir);
3319 struct nfs_renameargs *arg = msg->rpc_argp;
3320 struct nfs_renameres *res = msg->rpc_resp;
3321
3322 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3323 res->server = server;
9d12b216 3324 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3325}
3326
c6bfa1a1
BS		 3327static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3328{
d9afbd1b
TM		 3329 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3330 &data->args.seq_args,
3331 &data->res.seq_res,
3332 task);
d3d4152a
JL		 3333}
3334
3335static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3336 struct inode *new_dir)
3337{
fbc6f7c2
TM		 3338 struct nfs_renamedata *data = task->tk_calldata;
3339 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3340
3341 if (!nfs4_sequence_done(task, &res->seq_res))
3342 return 0;
3343 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3344 return 0;
3345
3346 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3347 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3348 return 1;
3349}
3350
1da177e4
LT		 3351static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3352 struct inode *new_dir, struct qstr *new_name)
3353{
6caf2c82 3354 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3355 struct nfs_renameargs arg = {
1da177e4
LT		 3356 .old_dir = NFS_FH(old_dir),
3357 .new_dir = NFS_FH(new_dir),
3358 .old_name = old_name,
3359 .new_name = new_name,
6caf2c82 3360 };
e8582a8b 3361 struct nfs_renameres res = {
6caf2c82 3362 .server = server,
1da177e4 3363 };
1da177e4
LT		 3364 struct rpc_message msg = {
3365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3366 .rpc_argp = &arg,
3367 .rpc_resp = &res,
3368 };
011fff72 3369 int status = -ENOMEM;
14c43f76 3370
7c513058 3371 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3372 if (!status) {
3373 update_changeattr(old_dir, &res.old_cinfo);
3374 update_changeattr(new_dir, &res.new_cinfo);
3375 }
3376 return status;
3377}
3378
3379static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3380 struct inode *new_dir, struct qstr *new_name)
3381{
3382 struct nfs4_exception exception = { };
3383 int err;
3384 do {
fbc6f7c2
TM		 3385 err = _nfs4_proc_rename(old_dir, old_name,
3386 new_dir, new_name);
3387 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3388 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3389 &exception);
3390 } while (exception.retry);
3391 return err;
3392}
3393
3394static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3395{
91ba2eee 3396 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3397 struct nfs4_link_arg arg = {
3398 .fh = NFS_FH(inode),
3399 .dir_fh = NFS_FH(dir),
3400 .name = name,
91ba2eee
TM		 3401 .bitmask = server->attr_bitmask,
3402 };
91ba2eee
TM		 3403 struct nfs4_link_res res = {
3404 .server = server,
1775fd3e 3405 .label = NULL,
1da177e4 3406 };
1da177e4
LT		 3407 struct rpc_message msg = {
3408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3409 .rpc_argp = &arg,
91ba2eee 3410 .rpc_resp = &res,
1da177e4 3411 };
136f2627
TM		 3412 int status = -ENOMEM;
3413
3414 res.fattr = nfs_alloc_fattr();
778d2817 3415 if (res.fattr == NULL)
136f2627 3416 goto out;
1da177e4 3417
14c43f76
DQ		 3418 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3419 if (IS_ERR(res.label)) {
3420 status = PTR_ERR(res.label);
3421 goto out;
3422 }
aa9c2669 3423 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3424
7c513058 3425 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3426 if (!status) {
3427 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3428 status = nfs_post_op_update_inode(inode, res.fattr);
3429 if (!status)
3430 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3431 }
14c43f76
DQ		 3432
3433
3434 nfs4_label_free(res.label);
3435
136f2627 3436out:
136f2627 3437 nfs_free_fattr(res.fattr);
1da177e4
LT		 3438 return status;
3439}
3440
3441static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3442{
3443 struct nfs4_exception exception = { };
3444 int err;
3445 do {
3446 err = nfs4_handle_exception(NFS_SERVER(inode),
3447 _nfs4_proc_link(inode, dir, name),
3448 &exception);
3449 } while (exception.retry);
3450 return err;
3451}
3452
57dc9a57
TM		 3453struct nfs4_createdata {
3454 struct rpc_message msg;
3455 struct nfs4_create_arg arg;
3456 struct nfs4_create_res res;
3457 struct nfs_fh fh;
3458 struct nfs_fattr fattr;
1775fd3e 3459 struct nfs4_label *label;
57dc9a57
TM		 3460};
3461
3462static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3463 struct qstr *name, struct iattr *sattr, u32 ftype)
3464{
3465 struct nfs4_createdata *data;
3466
3467 data = kzalloc(sizeof(*data), GFP_KERNEL);
3468 if (data != NULL) {
3469 struct nfs_server *server = NFS_SERVER(dir);
3470
14c43f76
DQ		 3471 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3472 if (IS_ERR(data->label))
3473 goto out_free;
3474
57dc9a57
TM		 3475 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3476 data->msg.rpc_argp = &data->arg;
3477 data->msg.rpc_resp = &data->res;
3478 data->arg.dir_fh = NFS_FH(dir);
3479 data->arg.server = server;
3480 data->arg.name = name;
3481 data->arg.attrs = sattr;
3482 data->arg.ftype = ftype;
aa9c2669 3483 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3484 data->res.server = server;
3485 data->res.fh = &data->fh;
3486 data->res.fattr = &data->fattr;
1775fd3e 3487 data->res.label = data->label;
57dc9a57 3488 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3489 }
3490 return data;
14c43f76
DQ		 3491out_free:
3492 kfree(data);
3493 return NULL;
57dc9a57
TM		 3494}
3495
3496static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3497{
7c513058 3498 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3499 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3500 if (status == 0) {
3501 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3502 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3503 }
3504 return status;
3505}
3506
3507static void nfs4_free_createdata(struct nfs4_createdata *data)
3508{
14c43f76 3509 nfs4_label_free(data->label);
57dc9a57
TM		 3510 kfree(data);
3511}
3512
4f390c15 3513static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3514 struct page *page, unsigned int len, struct iattr *sattr,
3515 struct nfs4_label *label)
1da177e4 3516{
57dc9a57
TM		 3517 struct nfs4_createdata *data;
3518 int status = -ENAMETOOLONG;
1da177e4 3519
94a6d753 3520 if (len > NFS4_MAXPATHLEN)
57dc9a57 3521 goto out;
4f390c15 3522
57dc9a57
TM		 3523 status = -ENOMEM;
3524 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3525 if (data == NULL)
3526 goto out;
3527
3528 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3529 data->arg.u.symlink.pages = &page;
3530 data->arg.u.symlink.len = len;
1775fd3e 3531 data->arg.label = label;
1da177e4 3532
57dc9a57
TM		 3533 status = nfs4_do_create(dir, dentry, data);
3534
3535 nfs4_free_createdata(data);
3536out:
1da177e4
LT		 3537 return status;
3538}
3539
4f390c15 3540static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3541 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3542{
3543 struct nfs4_exception exception = { };
aa9c2669 3544 struct nfs4_label l, *label = NULL;
1da177e4 3545 int err;
aa9c2669
DQ		 3546
3547 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3548
1da177e4 3549 do {
078ea3df
TM		 3550 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3551 trace_nfs4_symlink(dir, &dentry->d_name, err);
3552 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3553 &exception);
3554 } while (exception.retry);
aa9c2669
DQ		 3555
3556 nfs4_label_release_security(label);
1da177e4
LT		 3557 return err;
3558}
3559
3560static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3561 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3562{
57dc9a57
TM		 3563 struct nfs4_createdata *data;
3564 int status = -ENOMEM;
1da177e4 3565
57dc9a57
TM		 3566 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3567 if (data == NULL)
3568 goto out;
3569
1775fd3e 3570 data->arg.label = label;
57dc9a57
TM		 3571 status = nfs4_do_create(dir, dentry, data);
3572
3573 nfs4_free_createdata(data);
3574out:
1da177e4
LT		 3575 return status;
3576}
3577
3578static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3579 struct iattr *sattr)
3580{
3581 struct nfs4_exception exception = { };
aa9c2669 3582 struct nfs4_label l, *label = NULL;
1da177e4 3583 int err;
a8a5da99 3584
aa9c2669
DQ		 3585 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3586
a8a5da99 3587 sattr->ia_mode &= ~current_umask();
1da177e4 3588 do {
078ea3df
TM		 3589 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3590 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3591 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3592 &exception);
3593 } while (exception.retry);
aa9c2669
DQ		 3594 nfs4_label_release_security(label);
3595
1da177e4
LT		 3596 return err;
3597}
3598
3599static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3600 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3601{
3602 struct inode *dir = dentry->d_inode;
3603 struct nfs4_readdir_arg args = {
3604 .fh = NFS_FH(dir),
56e4ebf8 3605 .pages = pages,
1da177e4
LT		 3606 .pgbase = 0,
3607 .count = count,
96d25e53 3608 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3609 .plus = plus,
1da177e4
LT		 3610 };
3611 struct nfs4_readdir_res res;
3612 struct rpc_message msg = {
3613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3614 .rpc_argp = &args,
3615 .rpc_resp = &res,
3616 .rpc_cred = cred,
3617 };
3618 int status;
3619
3110ff80 3620 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3621 dentry->d_parent->d_name.name,
3622 dentry->d_name.name,
3623 (unsigned long long)cookie);
c3f52af3 3624 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3625 res.pgbase = args.pgbase;
7c513058 3626 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3627 if (status >= 0) {
c3f52af3 3628 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3629 status += args.pgbase;
3630 }
c4812998
TM		 3631
3632 nfs_invalidate_atime(dir);
3633
3110ff80 3634 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3635 return status;
3636}
3637
3638static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3639 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3640{
3641 struct nfs4_exception exception = { };
3642 int err;
3643 do {
c1578b76
TM		 3644 err = _nfs4_proc_readdir(dentry, cred, cookie,
3645 pages, count, plus);
3646 trace_nfs4_readdir(dentry->d_inode, err);
3647 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3648 &exception);
3649 } while (exception.retry);
3650 return err;
3651}
3652
3653static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3654 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3655{
57dc9a57
TM		 3656 struct nfs4_createdata *data;
3657 int mode = sattr->ia_mode;
3658 int status = -ENOMEM;
1da177e4 3659
57dc9a57
TM		 3660 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3661 if (data == NULL)
3662 goto out;
3663
1da177e4 3664 if (S_ISFIFO(mode))
57dc9a57 3665 data->arg.ftype = NF4FIFO;
1da177e4 3666 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3667 data->arg.ftype = NF4BLK;
3668 data->arg.u.device.specdata1 = MAJOR(rdev);
3669 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3670 }
3671 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3672 data->arg.ftype = NF4CHR;
3673 data->arg.u.device.specdata1 = MAJOR(rdev);
3674 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3675 } else if (!S_ISSOCK(mode)) {
3676 status = -EINVAL;
3677 goto out_free;
1da177e4 3678 }
1775fd3e 3679
aa9c2669 3680 data->arg.label = label;
57dc9a57 3681 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3682out_free:
57dc9a57
TM		 3683 nfs4_free_createdata(data);
3684out:
1da177e4
LT		 3685 return status;
3686}
3687
3688static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3689 struct iattr *sattr, dev_t rdev)
3690{
3691 struct nfs4_exception exception = { };
aa9c2669 3692 struct nfs4_label l, *label = NULL;
1da177e4 3693 int err;
a8a5da99 3694
aa9c2669
DQ		 3695 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3696
a8a5da99 3697 sattr->ia_mode &= ~current_umask();
1da177e4 3698 do {
078ea3df
TM		 3699 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3700 trace_nfs4_mknod(dir, &dentry->d_name, err);
3701 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3702 &exception);
3703 } while (exception.retry);
aa9c2669
DQ		 3704
3705 nfs4_label_release_security(label);
3706
1da177e4
LT		 3707 return err;
3708}
3709
3710static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3711 struct nfs_fsstat *fsstat)
3712{
3713 struct nfs4_statfs_arg args = {
3714 .fh = fhandle,
3715 .bitmask = server->attr_bitmask,
3716 };
24ad148a
BH		 3717 struct nfs4_statfs_res res = {
3718 .fsstat = fsstat,
3719 };
1da177e4
LT		 3720 struct rpc_message msg = {
3721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3722 .rpc_argp = &args,
24ad148a 3723 .rpc_resp = &res,
1da177e4
LT		 3724 };
3725
0e574af1 3726 nfs_fattr_init(fsstat->fattr);
7c513058 3727 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3728}
3729
3730static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3731{
3732 struct nfs4_exception exception = { };
3733 int err;
3734 do {
3735 err = nfs4_handle_exception(server,
3736 _nfs4_proc_statfs(server, fhandle, fsstat),
3737 &exception);
3738 } while (exception.retry);
3739 return err;
3740}
3741
3742static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3743 struct nfs_fsinfo *fsinfo)
3744{
3745 struct nfs4_fsinfo_arg args = {
3746 .fh = fhandle,
3747 .bitmask = server->attr_bitmask,
3748 };
3dda5e43
BH		 3749 struct nfs4_fsinfo_res res = {
3750 .fsinfo = fsinfo,
3751 };
1da177e4
LT		 3752 struct rpc_message msg = {
3753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3754 .rpc_argp = &args,
3dda5e43 3755 .rpc_resp = &res,
1da177e4
LT		 3756 };
3757
7c513058 3758 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3759}
3760
3761static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3762{
3763 struct nfs4_exception exception = { };
83ca7f5a 3764 unsigned long now = jiffies;
1da177e4
LT		 3765 int err;
3766
3767 do {
83ca7f5a 3768 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3769 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3770 if (err == 0) {
3771 struct nfs_client *clp = server->nfs_client;
3772
3773 spin_lock(&clp->cl_lock);
3774 clp->cl_lease_time = fsinfo->lease_time * HZ;
3775 clp->cl_last_renewal = now;
3776 spin_unlock(&clp->cl_lock);
3777 break;
3778 }
3779 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3780 } while (exception.retry);
3781 return err;
3782}
3783
3784static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3785{
e38eb650
BS		 3786 int error;
3787
0e574af1 3788 nfs_fattr_init(fsinfo->fattr);
e38eb650 3789 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3790 if (error == 0) {
3791 /* block layout checks this! */
3792 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3793 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3794 }
e38eb650
BS		 3795
3796 return error;
1da177e4
LT		 3797}
3798
3799static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3800 struct nfs_pathconf *pathconf)
3801{
3802 struct nfs4_pathconf_arg args = {
3803 .fh = fhandle,
3804 .bitmask = server->attr_bitmask,
3805 };
d45b2989
BH		 3806 struct nfs4_pathconf_res res = {
3807 .pathconf = pathconf,
3808 };
1da177e4
LT		 3809 struct rpc_message msg = {
3810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3811 .rpc_argp = &args,
d45b2989 3812 .rpc_resp = &res,
1da177e4
LT		 3813 };
3814
3815 /* None of the pathconf attributes are mandatory to implement */
3816 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3817 memset(pathconf, 0, sizeof(*pathconf));
3818 return 0;
3819 }
3820
0e574af1 3821 nfs_fattr_init(pathconf->fattr);
7c513058 3822 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3823}
3824
3825static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3826 struct nfs_pathconf *pathconf)
3827{
3828 struct nfs4_exception exception = { };
3829 int err;
3830
3831 do {
3832 err = nfs4_handle_exception(server,
3833 _nfs4_proc_pathconf(server, fhandle, pathconf),
3834 &exception);
3835 } while (exception.retry);
3836 return err;
3837}
3838
5521abfd 3839int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3840 const struct nfs_open_context *ctx,
3841 const struct nfs_lock_context *l_ctx,
3842 fmode_t fmode)
3843{
3844 const struct nfs_lockowner *lockowner = NULL;
3845
3846 if (l_ctx != NULL)
3847 lockowner = &l_ctx->lockowner;
5521abfd 3848 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3849}
3850EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3851
5521abfd
TM		 3852static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3853 const struct nfs_open_context *ctx,
3854 const struct nfs_lock_context *l_ctx,
3855 fmode_t fmode)
3856{
3857 nfs4_stateid current_stateid;
3858
3859 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3860 return false;
3861 return nfs4_stateid_match(stateid, &current_stateid);
3862}
3863
3864static bool nfs4_error_stateid_expired(int err)
3865{
3866 switch (err) {
3867 case -NFS4ERR_DELEG_REVOKED:
3868 case -NFS4ERR_ADMIN_REVOKED:
3869 case -NFS4ERR_BAD_STATEID:
3870 case -NFS4ERR_STALE_STATEID:
3871 case -NFS4ERR_OLD_STATEID:
3872 case -NFS4ERR_OPENMODE:
3873 case -NFS4ERR_EXPIRED:
3874 return true;
3875 }
3876 return false;
3877}
3878
d20581aa
BH		 3879void __nfs4_read_done_cb(struct nfs_read_data *data)
3880{
cd841605 3881 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3882}
3883
cbdabc7f 3884static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3885{
cd841605 3886 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3887
cc668ab3 3888 trace_nfs4_read(data, task->tk_status);
9e33bed5 3889 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3890 rpc_restart_call_prepare(task);
ec06c096 3891 return -EAGAIN;
1da177e4 3892 }
8850df99 3893
d20581aa 3894 __nfs4_read_done_cb(data);
1da177e4 3895 if (task->tk_status > 0)
ec06c096
TM		 3896 renew_lease(server, data->timestamp);
3897 return 0;
1da177e4
LT		 3898}
3899
5521abfd
TM		 3900static bool nfs4_read_stateid_changed(struct rpc_task *task,
3901 struct nfs_readargs *args)
3902{
3903
3904 if (!nfs4_error_stateid_expired(task->tk_status) ||
3905 nfs4_stateid_is_current(&args->stateid,
3906 args->context,
3907 args->lock_context,
3908 FMODE_READ))
3909 return false;
3910 rpc_restart_call_prepare(task);
3911 return true;
3912}
3913
cbdabc7f
AA		 3914static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3915{
3916
3917 dprintk("--> %s\n", __func__);
3918
3919 if (!nfs4_sequence_done(task, &data->res.seq_res))
3920 return -EAGAIN;
5521abfd
TM		 3921 if (nfs4_read_stateid_changed(task, &data->args))
3922 return -EAGAIN;
d20581aa
BH		 3923 return data->read_done_cb ? data->read_done_cb(task, data) :
3924 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3925}
3926
bdc7f021 3927static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3928{
1da177e4 3929 data->timestamp = jiffies;
cbdabc7f 3930 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3931 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3932 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3933}
3934
ea7c3303
BS		 3935static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3936{
9b206149 3937 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3938 &data->args.seq_args,
3939 &data->res.seq_res,
9b206149
TM		 3940 task))
3941 return;
3942 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3943 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3944}
3945
b029bc9b 3946static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3947{
cd841605 3948 struct inode *inode = data->header->inode;
1da177e4 3949
cc668ab3 3950 trace_nfs4_write(data, task->tk_status);
9e33bed5 3951 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3952 rpc_restart_call_prepare(task);
788e7a89 3953 return -EAGAIN;
1da177e4 3954 }
4f9838c7 3955 if (task->tk_status >= 0) {
1da177e4 3956 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3957 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3958 }
788e7a89 3959 return 0;
1da177e4
LT		 3960}
3961
5521abfd
TM		 3962static bool nfs4_write_stateid_changed(struct rpc_task *task,
3963 struct nfs_writeargs *args)
3964{
3965
3966 if (!nfs4_error_stateid_expired(task->tk_status) ||
3967 nfs4_stateid_is_current(&args->stateid,
3968 args->context,
3969 args->lock_context,
3970 FMODE_WRITE))
3971 return false;
3972 rpc_restart_call_prepare(task);
3973 return true;
3974}
3975
b029bc9b
FI		 3976static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3977{
3978 if (!nfs4_sequence_done(task, &data->res.seq_res))
3979 return -EAGAIN;
5521abfd
TM		 3980 if (nfs4_write_stateid_changed(task, &data->args))
3981 return -EAGAIN;
d20581aa
BH		 3982 return data->write_done_cb ? data->write_done_cb(task, data) :
3983 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3984}
3985
5a37f851
TM		 3986static
3987bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3988{
5a37f851
TM		 3989 const struct nfs_pgio_header *hdr = data->header;
3990
3991 /* Don't request attributes for pNFS or O_DIRECT writes */
3992 if (data->ds_clp != NULL || hdr->dreq != NULL)
3993 return false;
3994 /* Otherwise, request attributes if and only if we don't hold
3995 * a delegation
3996 */
011e2a7f 3997 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3998}
a69aef14 3999
bdc7f021 4000static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4001{
cd841605 4002 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4003
5a37f851 4004 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4005 data->args.bitmask = NULL;
4006 data->res.fattr = NULL;
4007 } else
4008 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4009
b029bc9b
FI		 4010 if (!data->write_done_cb)
4011 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4012 data->res.server = server;
1da177e4
LT		 4013 data->timestamp = jiffies;
4014
bdc7f021 4015 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 4016 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4017}
4018
c6cb80d0
BS		 4019static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4020{
9b206149 4021 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4022 &data->args.seq_args,
4023 &data->res.seq_res,
9b206149
TM		 4024 task))
4025 return;
4026 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4027 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4028}
4029
0b7c0153 4030static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4031{
d9afbd1b
TM		 4032 nfs4_setup_sequence(NFS_SERVER(data->inode),
4033 &data->args.seq_args,
4034 &data->res.seq_res,
4035 task);
1da177e4
LT		 4036}
4037
0b7c0153 4038static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4039{
1da177e4 4040 struct inode *inode = data->inode;
14516c3a 4041
cc668ab3 4042 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4043 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4044 rpc_restart_call_prepare(task);
788e7a89 4045 return -EAGAIN;
1da177e4 4046 }
788e7a89 4047 return 0;
1da177e4
LT		 4048}
4049
0b7c0153 4050static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4051{
4052 if (!nfs4_sequence_done(task, &data->res.seq_res))
4053 return -EAGAIN;
0b7c0153 4054 return data->commit_done_cb(task, data);
5f452431
FI		 4055}
4056
0b7c0153 4057static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4058{
788e7a89 4059 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4060
0b7c0153
FI		 4061 if (data->commit_done_cb == NULL)
4062 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4063 data->res.server = server;
bdc7f021 4064 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4065 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4066}
4067
9bc4e3ca
CL		 4068struct nfs4_renewdata {
4069 struct nfs_client *client;
4070 unsigned long timestamp;
4071};
4072
1da177e4
LT		 4073/*
4074 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4075 * standalone procedure for queueing an asynchronous RENEW.
4076 */
9bc4e3ca 4077static void nfs4_renew_release(void *calldata)
dc96aef9 4078{
9bc4e3ca
CL		 4079 struct nfs4_renewdata *data = calldata;
4080 struct nfs_client *clp = data->client;
dc96aef9 4081
0851de06
AB		 4082 if (atomic_read(&clp->cl_count) > 1)
4083 nfs4_schedule_state_renewal(clp);
4084 nfs_put_client(clp);
9bc4e3ca 4085 kfree(data);
dc96aef9
AB		 4086}
4087
9bc4e3ca 4088static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4089{
9bc4e3ca
CL		 4090 struct nfs4_renewdata *data = calldata;
4091 struct nfs_client *clp = data->client;
4092 unsigned long timestamp = data->timestamp;
1da177e4 4093
c6d01c6f 4094 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4095 if (task->tk_status < 0) {
95baa25c 4096 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4097 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4098 return;
4099 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4100 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4101 return;
4102 }
4103 nfs4_schedule_path_down_recovery(clp);
1da177e4 4104 }
452e9352 4105 do_renew_lease(clp, timestamp);
1da177e4
LT		 4106}
4107
963d8fe5
TM		 4108static const struct rpc_call_ops nfs4_renew_ops = {
4109 .rpc_call_done = nfs4_renew_done,
dc96aef9 4110 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4111};
4112
2f60ea6b 4113static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4114{
4115 struct rpc_message msg = {
4116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4117 .rpc_argp = clp,
b4454fe1 4118 .rpc_cred = cred,
1da177e4 4119 };
9bc4e3ca 4120 struct nfs4_renewdata *data;
1da177e4 4121
2f60ea6b
TM		 4122 if (renew_flags == 0)
4123 return 0;
0851de06
AB		 4124 if (!atomic_inc_not_zero(&clp->cl_count))
4125 return -EIO;
b569ad34 4126 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4127 if (data == NULL)
4128 return -ENOMEM;
4129 data->client = clp;
4130 data->timestamp = jiffies;
bc7a05ca 4131 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4132 &nfs4_renew_ops, data);
1da177e4
LT		 4133}
4134
8534d4ec 4135static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4136{
4137 struct rpc_message msg = {
4138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4139 .rpc_argp = clp,
b4454fe1 4140 .rpc_cred = cred,
1da177e4
LT		 4141 };
4142 unsigned long now = jiffies;
4143 int status;
4144
bc7a05ca 4145 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4146 if (status < 0)
4147 return status;
452e9352 4148 do_renew_lease(clp, now);
1da177e4
LT		 4149 return 0;
4150}
4151
aa1870af
BF		 4152static inline int nfs4_server_supports_acls(struct nfs_server *server)
4153{
4154 return (server->caps & NFS_CAP_ACLS)
4155 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4156 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4157}
4158
21f498c2
TM		 4159/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4160 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4161 * the stack.
4162 */
21f498c2 4163#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4164
e9e3d724
NH		 4165static int buf_to_pages_noslab(const void *buf, size_t buflen,
4166 struct page **pages, unsigned int *pgbase)
4167{
4168 struct page *newpage, **spages;
4169 int rc = 0;
4170 size_t len;
4171 spages = pages;
4172
4173 do {
21f498c2 4174 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4175 newpage = alloc_page(GFP_KERNEL);
4176
4177 if (newpage == NULL)
4178 goto unwind;
4179 memcpy(page_address(newpage), buf, len);
4180 buf += len;
4181 buflen -= len;
4182 *pages++ = newpage;
4183 rc++;
4184 } while (buflen != 0);
4185
4186 return rc;
4187
4188unwind:
4189 for(; rc > 0; rc--)
4190 __free_page(spages[rc-1]);
4191 return -ENOMEM;
4192}
4193
e50a1c2e
BF		 4194struct nfs4_cached_acl {
4195 int cached;
4196 size_t len;
3e9d4154 4197 char data[0];
e50a1c2e
BF		 4198};
4199
4200static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4201{
4202 struct nfs_inode *nfsi = NFS_I(inode);
4203
4204 spin_lock(&inode->i_lock);
4205 kfree(nfsi->nfs4_acl);
4206 nfsi->nfs4_acl = acl;
4207 spin_unlock(&inode->i_lock);
4208}
4209
4210static void nfs4_zap_acl_attr(struct inode *inode)
4211{
4212 nfs4_set_cached_acl(inode, NULL);
4213}
4214
4215static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4216{
4217 struct nfs_inode *nfsi = NFS_I(inode);
4218 struct nfs4_cached_acl *acl;
4219 int ret = -ENOENT;
4220
4221 spin_lock(&inode->i_lock);
4222 acl = nfsi->nfs4_acl;
4223 if (acl == NULL)
4224 goto out;
4225 if (buf == NULL) /* user is just asking for length */
4226 goto out_len;
4227 if (acl->cached == 0)
4228 goto out;
4229 ret = -ERANGE; /* see getxattr(2) man page */
4230 if (acl->len > buflen)
4231 goto out;
4232 memcpy(buf, acl->data, acl->len);
4233out_len:
4234 ret = acl->len;
4235out:
4236 spin_unlock(&inode->i_lock);
4237 return ret;
4238}
4239
5794d21e 4240static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4241{
4242 struct nfs4_cached_acl *acl;
b291f1b1 4243 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4244
1f1ea6c2 4245 if (buflen <= PAGE_SIZE) {
b291f1b1 4246 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4247 if (acl == NULL)
4248 goto out;
4249 acl->cached = 1;
5794d21e 4250 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4251 } else {
4252 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4253 if (acl == NULL)
4254 goto out;
4255 acl->cached = 0;
4256 }
4257 acl->len = acl_len;
4258out:
4259 nfs4_set_cached_acl(inode, acl);
4260}
4261
bf118a34
AA		 4262/*
4263 * The getxattr API returns the required buffer length when called with a
4264 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4265 * the required buf. On a NULL buf, we send a page of data to the server
4266 * guessing that the ACL request can be serviced by a page. If so, we cache
4267 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4268 * the cache. If not so, we throw away the page, and cache the required
4269 * length. The next getxattr call will then produce another round trip to
4270 * the server, this time with the input buf of the required size.
4271 */
16b4289c 4272static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4273{
bf118a34 4274 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4275 struct nfs_getaclargs args = {
4276 .fh = NFS_FH(inode),
4277 .acl_pages = pages,
4278 .acl_len = buflen,
4279 };
663c79b3
BH		 4280 struct nfs_getaclres res = {
4281 .acl_len = buflen,
4282 };
aa1870af
BF		 4283 struct rpc_message msg = {
4284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4285 .rpc_argp = &args,
663c79b3 4286 .rpc_resp = &res,
aa1870af 4287 };
21f498c2
TM		 4288 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4289 int ret = -ENOMEM, i;
aa1870af 4290
bf118a34
AA		 4291 /* As long as we're doing a round trip to the server anyway,
4292 * let's be prepared for a page of acl data. */
4293 if (npages == 0)
4294 npages = 1;
21f498c2
TM		 4295 if (npages > ARRAY_SIZE(pages))
4296 return -ERANGE;
5a006899 4297
bf118a34
AA		 4298 for (i = 0; i < npages; i++) {
4299 pages[i] = alloc_page(GFP_KERNEL);
4300 if (!pages[i])
4301 goto out_free;
e50a1c2e 4302 }
5a006899
SP		 4303
4304 /* for decoding across pages */
4305 res.acl_scratch = alloc_page(GFP_KERNEL);
4306 if (!res.acl_scratch)
4307 goto out_free;
4308
bf118a34
AA		 4309 args.acl_len = npages * PAGE_SIZE;
4310 args.acl_pgbase = 0;
5a006899 4311
de040bec 4312 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4313 __func__, buf, buflen, npages, args.acl_len);
4314 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4315 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4316 if (ret)
4317 goto out_free;
bf118a34 4318
1f1ea6c2
TM		 4319 /* Handle the case where the passed-in buffer is too short */
4320 if (res.acl_flags & NFS4_ACL_TRUNC) {
4321 /* Did the user only issue a request for the acl length? */
4322 if (buf == NULL)
4323 goto out_ok;
e50a1c2e 4324 ret = -ERANGE;
1f1ea6c2 4325 goto out_free;
e50a1c2e 4326 }
1f1ea6c2 4327 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4328 if (buf) {
4329 if (res.acl_len > buflen) {
4330 ret = -ERANGE;
4331 goto out_free;
4332 }
1f1ea6c2 4333 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4334 }
1f1ea6c2
TM		 4335out_ok:
4336 ret = res.acl_len;
e50a1c2e 4337out_free:
bf118a34
AA		 4338 for (i = 0; i < npages; i++)
4339 if (pages[i])
4340 __free_page(pages[i]);
331818f1
TM		 4341 if (res.acl_scratch)
4342 __free_page(res.acl_scratch);
aa1870af
BF		 4343 return ret;
4344}
4345
16b4289c
TM		 4346static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4347{
4348 struct nfs4_exception exception = { };
4349 ssize_t ret;
4350 do {
4351 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4352 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4353 if (ret >= 0)
4354 break;
4355 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4356 } while (exception.retry);
4357 return ret;
4358}
4359
e50a1c2e
BF		 4360static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4361{
4362 struct nfs_server *server = NFS_SERVER(inode);
4363 int ret;
4364
4365 if (!nfs4_server_supports_acls(server))
4366 return -EOPNOTSUPP;
4367 ret = nfs_revalidate_inode(server, inode);
4368 if (ret < 0)
4369 return ret;
08a22b39
AK		 4370 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4371 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4372 ret = nfs4_read_cached_acl(inode, buf, buflen);
4373 if (ret != -ENOENT)
bf118a34
AA		 4374 /* -ENOENT is returned if there is no ACL or if there is an ACL
4375 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4376 return ret;
4377 return nfs4_get_acl_uncached(inode, buf, buflen);
4378}
4379
16b4289c 4380static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4381{
4382 struct nfs_server *server = NFS_SERVER(inode);
4383 struct page *pages[NFS4ACL_MAXPAGES];
4384 struct nfs_setaclargs arg = {
4385 .fh = NFS_FH(inode),
4386 .acl_pages = pages,
4387 .acl_len = buflen,
4388 };
73c403a9 4389 struct nfs_setaclres res;
4b580ee3
BF		 4390 struct rpc_message msg = {
4391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4392 .rpc_argp = &arg,
73c403a9 4393 .rpc_resp = &res,
4b580ee3 4394 };
21f498c2 4395 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4396 int ret, i;
4b580ee3
BF		 4397
4398 if (!nfs4_server_supports_acls(server))
4399 return -EOPNOTSUPP;
21f498c2
TM		 4400 if (npages > ARRAY_SIZE(pages))
4401 return -ERANGE;
e9e3d724
NH		 4402 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4403 if (i < 0)
4404 return i;
57ec14c5 4405 nfs4_inode_return_delegation(inode);
7c513058 4406 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4407
4408 /*
4409 * Free each page after tx, so the only ref left is
4410 * held by the network stack
4411 */
4412 for (; i > 0; i--)
4413 put_page(pages[i-1]);
4414
08a22b39
AK		 4415 /*
4416 * Acl update can result in inode attribute update.
4417 * so mark the attribute cache invalid.
4418 */
4419 spin_lock(&inode->i_lock);
4420 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4421 spin_unlock(&inode->i_lock);
f41f7418
TM		 4422 nfs_access_zap_cache(inode);
4423 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4424 return ret;
4425}
4426
16b4289c
TM		 4427static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4428{
4429 struct nfs4_exception exception = { };
4430 int err;
4431 do {
c1578b76
TM		 4432 err = __nfs4_proc_set_acl(inode, buf, buflen);
4433 trace_nfs4_set_acl(inode, err);
4434 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4435 &exception);
4436 } while (exception.retry);
4437 return err;
4438}
4439
aa9c2669
DQ		 4440#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4441static int _nfs4_get_security_label(struct inode *inode, void *buf,
4442 size_t buflen)
4443{
4444 struct nfs_server *server = NFS_SERVER(inode);
4445 struct nfs_fattr fattr;
4446 struct nfs4_label label = {0, 0, buflen, buf};
4447
4448 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4449 struct nfs4_getattr_arg args = {
4450 .fh = NFS_FH(inode),
4451 .bitmask = bitmask,
4452 };
4453 struct nfs4_getattr_res res = {
4454 .fattr = &fattr,
4455 .label = &label,
4456 .server = server,
4457 };
4458 struct rpc_message msg = {
4459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4460 .rpc_argp = &args,
4461 .rpc_resp = &res,
4462 };
4463 int ret;
4464
4465 nfs_fattr_init(&fattr);
4466
4467 ret = rpc_call_sync(server->client, &msg, 0);
4468 if (ret)
4469 return ret;
4470 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4471 return -ENOENT;
4472 if (buflen < label.len)
4473 return -ERANGE;
4474 return 0;
4475}
4476
4477static int nfs4_get_security_label(struct inode *inode, void *buf,
4478 size_t buflen)
4479{
4480 struct nfs4_exception exception = { };
4481 int err;
4482
4483 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4484 return -EOPNOTSUPP;
4485
4486 do {
c1578b76
TM		 4487 err = _nfs4_get_security_label(inode, buf, buflen);
4488 trace_nfs4_get_security_label(inode, err);
4489 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4490 &exception);
4491 } while (exception.retry);
4492 return err;
4493}
4494
4495static int _nfs4_do_set_security_label(struct inode *inode,
4496 struct nfs4_label *ilabel,
4497 struct nfs_fattr *fattr,
4498 struct nfs4_label *olabel)
4499{
4500
4501 struct iattr sattr = {0};
4502 struct nfs_server *server = NFS_SERVER(inode);
4503 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4504 struct nfs_setattrargs args = {
4505 .fh = NFS_FH(inode),
4506 .iap = &sattr,
4507 .server = server,
4508 .bitmask = bitmask,
4509 .label = ilabel,
4510 };
4511 struct nfs_setattrres res = {
4512 .fattr = fattr,
4513 .label = olabel,
4514 .server = server,
4515 };
4516 struct rpc_message msg = {
4517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4518 .rpc_argp = &args,
4519 .rpc_resp = &res,
4520 };
4521 int status;
4522
4523 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4524
4525 status = rpc_call_sync(server->client, &msg, 0);
4526 if (status)
4527 dprintk("%s failed: %d\n", __func__, status);
4528
4529 return status;
4530}
4531
4532static int nfs4_do_set_security_label(struct inode *inode,
4533 struct nfs4_label *ilabel,
4534 struct nfs_fattr *fattr,
4535 struct nfs4_label *olabel)
4536{
4537 struct nfs4_exception exception = { };
4538 int err;
4539
4540 do {
c1578b76
TM		 4541 err = _nfs4_do_set_security_label(inode, ilabel,
4542 fattr, olabel);
4543 trace_nfs4_set_security_label(inode, err);
4544 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4545 &exception);
4546 } while (exception.retry);
4547 return err;
4548}
4549
4550static int
4551nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4552{
4553 struct nfs4_label ilabel, *olabel = NULL;
4554 struct nfs_fattr fattr;
4555 struct rpc_cred *cred;
4556 struct inode *inode = dentry->d_inode;
4557 int status;
4558
4559 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4560 return -EOPNOTSUPP;
4561
4562 nfs_fattr_init(&fattr);
4563
4564 ilabel.pi = 0;
4565 ilabel.lfs = 0;
4566 ilabel.label = (char *)buf;
4567 ilabel.len = buflen;
4568
4569 cred = rpc_lookup_cred();
4570 if (IS_ERR(cred))
4571 return PTR_ERR(cred);
4572
4573 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4574 if (IS_ERR(olabel)) {
4575 status = -PTR_ERR(olabel);
4576 goto out;
4577 }
4578
4579 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4580 if (status == 0)
4581 nfs_setsecurity(inode, &fattr, olabel);
4582
4583 nfs4_label_free(olabel);
4584out:
4585 put_rpccred(cred);
4586 return status;
4587}
4588#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4589
4590
1da177e4 4591static int
aa5190d0 4592nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4593{
aa5190d0
TM		 4594 struct nfs_client *clp = server->nfs_client;
4595
4596 if (task->tk_status >= 0)
1da177e4
LT		 4597 return 0;
4598 switch(task->tk_status) {
a1d0b5ee 4599 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4600 case -NFS4ERR_ADMIN_REVOKED:
4601 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4602 if (state == NULL)
4603 break;
4604 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4605 case -NFS4ERR_OPENMODE:
4606 if (state == NULL)
4607 break;
5d422301
TM		 4608 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4609 goto stateid_invalid;
0400a6b0 4610 goto wait_on_recovery;
0ced63d1 4611 case -NFS4ERR_EXPIRED:
5d422301
TM		 4612 if (state != NULL) {
4613 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4614 goto stateid_invalid;
4615 }
1da177e4 4616 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4617 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4618 nfs4_schedule_lease_recovery(clp);
4619 goto wait_on_recovery;
4745e315
AA		 4620#if defined(CONFIG_NFS_V4_1)
4621 case -NFS4ERR_BADSESSION:
4622 case -NFS4ERR_BADSLOT:
4623 case -NFS4ERR_BAD_HIGH_SLOT:
4624 case -NFS4ERR_DEADSESSION:
4625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4626 case -NFS4ERR_SEQ_FALSE_RETRY:
4627 case -NFS4ERR_SEQ_MISORDERED:
4628 dprintk("%s ERROR %d, Reset session\n", __func__,
4629 task->tk_status);
9f594791 4630 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4631 task->tk_status = 0;
4632 return -EAGAIN;
4633#endif /* CONFIG_NFS_V4_1 */
1da177e4 4634 case -NFS4ERR_DELAY:
aa5190d0 4635 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4636 case -NFS4ERR_GRACE:
1da177e4
LT		 4637 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4638 task->tk_status = 0;
4639 return -EAGAIN;
a8a4ae3a 4640 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4641 case -NFS4ERR_OLD_STATEID:
4642 task->tk_status = 0;
4643 return -EAGAIN;
4644 }
4645 task->tk_status = nfs4_map_errors(task->tk_status);
4646 return 0;
5d422301
TM		 4647stateid_invalid:
4648 task->tk_status = -EIO;
4649 return 0;
0400a6b0 4650wait_on_recovery:
a2c0b9e2 4651 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4652 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4653 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4654 task->tk_status = 0;
4655 return -EAGAIN;
1da177e4
LT		 4656}
4657
f092075d
CL		 4658static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4659 nfs4_verifier *bootverf)
cd93710e
CL		 4660{
4661 __be32 verf[2];
4662
2c820d9a
CL		 4663 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4664 /* An impossible timestamp guarantees this value
4665 * will never match a generated boot time. */
4666 verf[0] = 0;
17f26b12 4667 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4668 } else {
f092075d 4669 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4670 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4671 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4672 }
cd93710e
CL		 4673 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4674}
4675
e984a55a
CL		 4676static unsigned int
4677nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4678 char *buf, size_t len)
4679{
4680 unsigned int result;
4681
4682 rcu_read_lock();
4683 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4684 clp->cl_ipaddr,
4685 rpc_peeraddr2str(clp->cl_rpcclient,
4686 RPC_DISPLAY_ADDR),
4687 rpc_peeraddr2str(clp->cl_rpcclient,
4688 RPC_DISPLAY_PROTO));
4689 rcu_read_unlock();
4690 return result;
4691}
4692
4693static unsigned int
4694nfs4_init_uniform_client_string(const struct nfs_client *clp,
4695 char *buf, size_t len)
4696{
55b59293 4697 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4698
4699 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4700 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4701 clp->rpc_ops->version,
4702 clp->cl_minorversion,
4703 nfs4_client_id_uniquifier,
4704 nodename);
e984a55a
CL		 4705 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4706 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4707 nodename);
e984a55a
CL		 4708}
4709
6bbb4ae8
CL		 4710/**
4711 * nfs4_proc_setclientid - Negotiate client ID
4712 * @clp: state data structure
4713 * @program: RPC program for NFSv4 callback service
4714 * @port: IP port number for NFS4 callback service
4715 * @cred: RPC credential to use for this call
4716 * @res: where to place the result
4717 *
4718 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4719 */
bb8b27e5
TM		 4720int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4721 unsigned short port, struct rpc_cred *cred,
4722 struct nfs4_setclientid_res *res)
1da177e4
LT		 4723{
4724 nfs4_verifier sc_verifier;
4725 struct nfs4_setclientid setclientid = {
4726 .sc_verifier = &sc_verifier,
4727 .sc_prog = program,
f4eecd5d 4728 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4729 };
4730 struct rpc_message msg = {
4731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4732 .rpc_argp = &setclientid,
bb8b27e5 4733 .rpc_resp = res,
286d7d6a 4734 .rpc_cred = cred,
1da177e4 4735 };
6bbb4ae8 4736 int status;
1da177e4 4737
de734831 4738 /* nfs_client_id4 */
f092075d 4739 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4740 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4741 setclientid.sc_name_len =
4742 nfs4_init_uniform_client_string(clp,
4743 setclientid.sc_name,
4744 sizeof(setclientid.sc_name));
4745 else
4746 setclientid.sc_name_len =
4747 nfs4_init_nonuniform_client_string(clp,
4748 setclientid.sc_name,
4749 sizeof(setclientid.sc_name));
de734831 4750 /* cb_client4 */
e984a55a 4751 rcu_read_lock();
de734831 4752 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4753 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4754 rpc_peeraddr2str(clp->cl_rpcclient,
4755 RPC_DISPLAY_NETID));
de734831
CL		 4756 rcu_read_unlock();
4757 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4758 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4759 clp->cl_ipaddr, port >> 8, port & 255);
4760
6bbb4ae8
CL		 4761 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4762 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4763 setclientid.sc_name_len, setclientid.sc_name);
4764 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4765 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4766 dprintk("NFS reply setclientid: %d\n", status);
4767 return status;
1da177e4
LT		 4768}
4769
6bbb4ae8
CL		 4770/**
4771 * nfs4_proc_setclientid_confirm - Confirm client ID
4772 * @clp: state data structure
4773 * @res: result of a previous SETCLIENTID
4774 * @cred: RPC credential to use for this call
4775 *
4776 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4777 */
fd954ae1 4778int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4779 struct nfs4_setclientid_res *arg,
4780 struct rpc_cred *cred)
1da177e4 4781{
1da177e4
LT		 4782 struct rpc_message msg = {
4783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4784 .rpc_argp = arg,
286d7d6a 4785 .rpc_cred = cred,
1da177e4 4786 };
1da177e4
LT		 4787 int status;
4788
6bbb4ae8
CL		 4789 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4790 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4791 clp->cl_clientid);
1bd714f2 4792 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4793 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4794 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4795 return status;
4796}
4797
fe650407
TM		 4798struct nfs4_delegreturndata {
4799 struct nfs4_delegreturnargs args;
fa178f29 4800 struct nfs4_delegreturnres res;
fe650407
TM		 4801 struct nfs_fh fh;
4802 nfs4_stateid stateid;
26e976a8 4803 unsigned long timestamp;
fa178f29 4804 struct nfs_fattr fattr;
fe650407
TM		 4805 int rpc_status;
4806};
4807
fe650407
TM		 4808static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4809{
4810 struct nfs4_delegreturndata *data = calldata;
938e1010 4811
14516c3a
TM		 4812 if (!nfs4_sequence_done(task, &data->res.seq_res))
4813 return;
938e1010 4814
ca8acf8d 4815 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4816 switch (task->tk_status) {
4817 case -NFS4ERR_STALE_STATEID:
4818 case -NFS4ERR_EXPIRED:
4819 case 0:
fa178f29 4820 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4821 break;
4822 default:
4823 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4824 -EAGAIN) {
d00c5d43 4825 rpc_restart_call_prepare(task);
79708861
RL		 4826 return;
4827 }
4828 }
4829 data->rpc_status = task->tk_status;
fe650407
TM		 4830}
4831
4832static void nfs4_delegreturn_release(void *calldata)
4833{
fe650407
TM		 4834 kfree(calldata);
4835}
4836
938e1010
AA		 4837#if defined(CONFIG_NFS_V4_1)
4838static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4839{
4840 struct nfs4_delegreturndata *d_data;
4841
4842 d_data = (struct nfs4_delegreturndata *)data;
4843
d9afbd1b
TM		 4844 nfs4_setup_sequence(d_data->res.server,
4845 &d_data->args.seq_args,
4846 &d_data->res.seq_res,
4847 task);
938e1010
AA		 4848}
4849#endif /* CONFIG_NFS_V4_1 */
4850
c8d149f3 4851static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4852#if defined(CONFIG_NFS_V4_1)
4853 .rpc_call_prepare = nfs4_delegreturn_prepare,
4854#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4855 .rpc_call_done = nfs4_delegreturn_done,
4856 .rpc_release = nfs4_delegreturn_release,
4857};
4858
e6f81075 4859static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4860{
4861 struct nfs4_delegreturndata *data;
fa178f29 4862 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4863 struct rpc_task *task;
5138fde0
TM		 4864 struct rpc_message msg = {
4865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4866 .rpc_cred = cred,
4867 };
c970aa85
TM		 4868 struct rpc_task_setup task_setup_data = {
4869 .rpc_client = server->client,
5138fde0 4870 .rpc_message = &msg,
c970aa85
TM		 4871 .callback_ops = &nfs4_delegreturn_ops,
4872 .flags = RPC_TASK_ASYNC,
4873 };
e6f81075 4874 int status = 0;
fe650407 4875
8535b2be 4876 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4877 if (data == NULL)
4878 return -ENOMEM;
9d12b216 4879 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4880 data->args.fhandle = &data->fh;
4881 data->args.stateid = &data->stateid;
9e907fec 4882 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4883 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4884 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4885 data->res.fattr = &data->fattr;
4886 data->res.server = server;
5138fde0 4887 nfs_fattr_init(data->res.fattr);
26e976a8 4888 data->timestamp = jiffies;
fe650407
TM		 4889 data->rpc_status = 0;
4890
c970aa85 4891 task_setup_data.callback_data = data;
1174dd1f
TM		 4892 msg.rpc_argp = &data->args;
4893 msg.rpc_resp = &data->res;
c970aa85 4894 task = rpc_run_task(&task_setup_data);
7a1218a2 4895 if (IS_ERR(task))
fe650407 4896 return PTR_ERR(task);
e6f81075
TM		 4897 if (!issync)
4898 goto out;
fe650407 4899 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4900 if (status != 0)
4901 goto out;
4902 status = data->rpc_status;
e144cbcc
TM		 4903 if (status == 0)
4904 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4905 else
4906 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4907out:
e6b3c4db 4908 rpc_put_task(task);
fe650407 4909 return status;
1da177e4
LT		 4910}
4911
e6f81075 4912int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4913{
4914 struct nfs_server *server = NFS_SERVER(inode);
4915 struct nfs4_exception exception = { };
4916 int err;
4917 do {
e6f81075 4918 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 4919 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 4920 switch (err) {
4921 case -NFS4ERR_STALE_STATEID:
4922 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4923 case 0:
4924 return 0;
4925 }
4926 err = nfs4_handle_exception(server, err, &exception);
4927 } while (exception.retry);
4928 return err;
4929}
4930
4931#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4932#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4933
4934/*
4935 * sleep, with exponential backoff, and retry the LOCK operation.
4936 */
4937static unsigned long
4938nfs4_set_lock_task_retry(unsigned long timeout)
4939{
416ad3c9 4940 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4941 timeout <<= 1;
4942 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4943 return NFS4_LOCK_MAXTIMEOUT;
4944 return timeout;
4945}
4946
1da177e4
LT		 4947static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4948{
4949 struct inode *inode = state->inode;
4950 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4951 struct nfs_client *clp = server->nfs_client;
911d1aaf 4952 struct nfs_lockt_args arg = {
1da177e4 4953 .fh = NFS_FH(inode),
911d1aaf 4954 .fl = request,
1da177e4 4955 };
911d1aaf
TM		 4956 struct nfs_lockt_res res = {
4957 .denied = request,
1da177e4
LT		 4958 };
4959 struct rpc_message msg = {
4960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4961 .rpc_argp = &arg,
4962 .rpc_resp = &res,
4963 .rpc_cred = state->owner->so_cred,
4964 };
1da177e4
LT		 4965 struct nfs4_lock_state *lsp;
4966 int status;
4967
911d1aaf 4968 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4969 status = nfs4_set_lock_state(state, request);
4970 if (status != 0)
4971 goto out;
4972 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4973 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4974 arg.lock_owner.s_dev = server->s_dev;
7c513058 4975 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4976 switch (status) {
4977 case 0:
4978 request->fl_type = F_UNLCK;
4979 break;
4980 case -NFS4ERR_DENIED:
4981 status = 0;
1da177e4 4982 }
70cc6487 4983 request->fl_ops->fl_release_private(request);
8d0a8a9d 4984out:
1da177e4
LT		 4985 return status;
4986}
4987
4988static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4989{
4990 struct nfs4_exception exception = { };
4991 int err;
4992
4993 do {
d1b748a5
TM		 4994 err = _nfs4_proc_getlk(state, cmd, request);
4995 trace_nfs4_get_lock(request, state, cmd, err);
4996 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 4997 &exception);
4998 } while (exception.retry);
4999 return err;
5000}
5001
5002static int do_vfs_lock(struct file *file, struct file_lock *fl)
5003{
5004 int res = 0;
5005 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5006 case FL_POSIX:
5007 res = posix_lock_file_wait(file, fl);
5008 break;
5009 case FL_FLOCK:
5010 res = flock_lock_file_wait(file, fl);
5011 break;
5012 default:
5013 BUG();
5014 }
1da177e4
LT		 5015 return res;
5016}
5017
faf5f49c 5018struct nfs4_unlockdata {
911d1aaf
TM		 5019 struct nfs_locku_args arg;
5020 struct nfs_locku_res res;
faf5f49c
TM		 5021 struct nfs4_lock_state *lsp;
5022 struct nfs_open_context *ctx;
911d1aaf
TM		 5023 struct file_lock fl;
5024 const struct nfs_server *server;
26e976a8 5025 unsigned long timestamp;
faf5f49c
TM		 5026};
5027
911d1aaf
TM		 5028static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5029 struct nfs_open_context *ctx,
5030 struct nfs4_lock_state *lsp,
5031 struct nfs_seqid *seqid)
5032{
5033 struct nfs4_unlockdata *p;
5034 struct inode *inode = lsp->ls_state->inode;
5035
8535b2be 5036 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5037 if (p == NULL)
5038 return NULL;
5039 p->arg.fh = NFS_FH(inode);
5040 p->arg.fl = &p->fl;
5041 p->arg.seqid = seqid;
c1d51931 5042 p->res.seqid = seqid;
911d1aaf
TM		 5043 p->arg.stateid = &lsp->ls_stateid;
5044 p->lsp = lsp;
5045 atomic_inc(&lsp->ls_count);
5046 /* Ensure we don't close file until we're done freeing locks! */
5047 p->ctx = get_nfs_open_context(ctx);
5048 memcpy(&p->fl, fl, sizeof(p->fl));
5049 p->server = NFS_SERVER(inode);
5050 return p;
5051}
5052
06f814a3 5053static void nfs4_locku_release_calldata(void *data)
faf5f49c 5054{
963d8fe5 5055 struct nfs4_unlockdata *calldata = data;
911d1aaf 5056 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5057 nfs4_put_lock_state(calldata->lsp);
5058 put_nfs_open_context(calldata->ctx);
5059 kfree(calldata);
faf5f49c
TM		 5060}
5061
963d8fe5 5062static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5063{
963d8fe5 5064 struct nfs4_unlockdata *calldata = data;
faf5f49c 5065
14516c3a
TM		 5066 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5067 return;
faf5f49c
TM		 5068 switch (task->tk_status) {
5069 case 0:
f597c537
TM		 5070 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5071 &calldata->res.stateid);
26e976a8 5072 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5073 break;
9e33bed5
TM		 5074 case -NFS4ERR_BAD_STATEID:
5075 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5076 case -NFS4ERR_STALE_STATEID:
5077 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5078 break;
5079 default:
9e33bed5 5080 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5081 rpc_restart_call_prepare(task);
faf5f49c 5082 }
2b1bc308 5083 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5084}
5085
4ce70ada 5086static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5087{
4ce70ada 5088 struct nfs4_unlockdata *calldata = data;
faf5f49c 5089
911d1aaf 5090 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5091 goto out_wait;
795a88c9 5092 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5093 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5094 goto out_no_action;
faf5f49c 5095 }
26e976a8 5096 calldata->timestamp = jiffies;
035168ab 5097 if (nfs4_setup_sequence(calldata->server,
a893693c 5098 &calldata->arg.seq_args,
2240a9e2
TM		 5099 &calldata->res.seq_res,
5100 task) != 0)
5101 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5102 return;
5103out_no_action:
5104 task->tk_action = NULL;
5105out_wait:
5106 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5107}
5108
963d8fe5 5109static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5110 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5111 .rpc_call_done = nfs4_locku_done,
06f814a3 5112 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5113};
5114
a5d16a4d
TM		 5115static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5116 struct nfs_open_context *ctx,
5117 struct nfs4_lock_state *lsp,
5118 struct nfs_seqid *seqid)
5119{
5120 struct nfs4_unlockdata *data;
5138fde0
TM		 5121 struct rpc_message msg = {
5122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5123 .rpc_cred = ctx->cred,
5124 };
c970aa85
TM		 5125 struct rpc_task_setup task_setup_data = {
5126 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5127 .rpc_message = &msg,
c970aa85 5128 .callback_ops = &nfs4_locku_ops,
101070ca 5129 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5130 .flags = RPC_TASK_ASYNC,
5131 };
a5d16a4d 5132
137d6aca
FF		 5133 /* Ensure this is an unlock - when canceling a lock, the
5134 * canceled lock is passed in, and it won't be an unlock.
5135 */
5136 fl->fl_type = F_UNLCK;
5137
a5d16a4d
TM		 5138 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5139 if (data == NULL) {
5140 nfs_free_seqid(seqid);
5141 return ERR_PTR(-ENOMEM);
5142 }
5143
9d12b216 5144 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5145 msg.rpc_argp = &data->arg;
5146 msg.rpc_resp = &data->res;
c970aa85
TM		 5147 task_setup_data.callback_data = data;
5148 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5149}
5150
faf5f49c
TM		 5151static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5152{
65b62a29
TM		 5153 struct inode *inode = state->inode;
5154 struct nfs4_state_owner *sp = state->owner;
5155 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5156 struct nfs_seqid *seqid;
1da177e4 5157 struct nfs4_lock_state *lsp;
06f814a3
TM		 5158 struct rpc_task *task;
5159 int status = 0;
536ff0f8 5160 unsigned char fl_flags = request->fl_flags;
faf5f49c 5161
8d0a8a9d 5162 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5163 /* Unlock _before_ we do the RPC call */
5164 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5165 /* Exclude nfs_delegation_claim_locks() */
5166 mutex_lock(&sp->so_delegreturn_mutex);
5167 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5168 down_read(&nfsi->rwsem);
5169 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5170 up_read(&nfsi->rwsem);
65b62a29 5171 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5172 goto out;
19e03c57
TM		 5173 }
5174 up_read(&nfsi->rwsem);
65b62a29 5175 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5176 if (status != 0)
9b073574
TM		 5177 goto out;
5178 /* Is this a delegated lock? */
8d0a8a9d 5179 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5180 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5181 goto out;
8535b2be 5182 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5183 status = -ENOMEM;
911d1aaf 5184 if (seqid == NULL)
9b073574 5185 goto out;
cd3758e3 5186 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5187 status = PTR_ERR(task);
5188 if (IS_ERR(task))
9b073574 5189 goto out;
a5d16a4d 5190 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5191 rpc_put_task(task);
9b073574 5192out:
536ff0f8 5193 request->fl_flags = fl_flags;
d1b748a5 5194 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5195 return status;
5196}
5197
a5d16a4d
TM		 5198struct nfs4_lockdata {
5199 struct nfs_lock_args arg;
5200 struct nfs_lock_res res;
5201 struct nfs4_lock_state *lsp;
5202 struct nfs_open_context *ctx;
5203 struct file_lock fl;
26e976a8 5204 unsigned long timestamp;
a5d16a4d
TM		 5205 int rpc_status;
5206 int cancelled;
66179efe 5207 struct nfs_server *server;
a5d16a4d
TM		 5208};
5209
5210static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5211 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5212 gfp_t gfp_mask)
1da177e4 5213{
a5d16a4d
TM		 5214 struct nfs4_lockdata *p;
5215 struct inode *inode = lsp->ls_state->inode;
1da177e4 5216 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5217
8535b2be 5218 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5219 if (p == NULL)
5220 return NULL;
5221
5222 p->arg.fh = NFS_FH(inode);
5223 p->arg.fl = &p->fl;
8535b2be 5224 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5225 if (p->arg.open_seqid == NULL)
5226 goto out_free;
8535b2be 5227 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5228 if (p->arg.lock_seqid == NULL)
2f74c0a0 5229 goto out_free_seqid;
a5d16a4d 5230 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5231 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5232 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5233 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5234 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5235 p->lsp = lsp;
66179efe 5236 p->server = server;
a5d16a4d
TM		 5237 atomic_inc(&lsp->ls_count);
5238 p->ctx = get_nfs_open_context(ctx);
5239 memcpy(&p->fl, fl, sizeof(p->fl));
5240 return p;
2f74c0a0
TM		 5241out_free_seqid:
5242 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5243out_free:
5244 kfree(p);
5245 return NULL;
5246}
5247
5248static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5249{
5250 struct nfs4_lockdata *data = calldata;
5251 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5252
3110ff80 5253 dprintk("%s: begin!\n", __func__);
2f74c0a0 5254 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5255 goto out_wait;
a5d16a4d
TM		 5256 /* Do we need to do an open_to_lock_owner? */
5257 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5258 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5259 goto out_release_lock_seqid;
8fe72bac 5260 }
8e472f33 5261 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5262 data->arg.new_lock_owner = 1;
c1d51931 5263 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5264 } else
5265 data->arg.new_lock_owner = 0;
5d422301
TM		 5266 if (!nfs4_valid_open_stateid(state)) {
5267 data->rpc_status = -EBADF;
5268 task->tk_action = NULL;
5269 goto out_release_open_seqid;
5270 }
26e976a8 5271 data->timestamp = jiffies;
035168ab
TM		 5272 if (nfs4_setup_sequence(data->server,
5273 &data->arg.seq_args,
2240a9e2 5274 &data->res.seq_res,
d9afbd1b 5275 task) == 0)
66179efe 5276 return;
5d422301 5277out_release_open_seqid:
2240a9e2
TM		 5278 nfs_release_seqid(data->arg.open_seqid);
5279out_release_lock_seqid:
5280 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5281out_wait:
5282 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5283 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5284}
5285
a5d16a4d
TM		 5286static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5287{
5288 struct nfs4_lockdata *data = calldata;
5289
3110ff80 5290 dprintk("%s: begin!\n", __func__);
a5d16a4d 5291
14516c3a
TM		 5292 if (!nfs4_sequence_done(task, &data->res.seq_res))
5293 return;
66179efe 5294
a5d16a4d 5295 data->rpc_status = task->tk_status;
a5d16a4d 5296 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5297 if (data->rpc_status == 0)
5298 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5299 else
5300 goto out;
5301 }
5302 if (data->rpc_status == 0) {
f597c537 5303 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5304 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5305 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5306 }
a5d16a4d 5307out:
3110ff80 5308 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5309}
5310
5311static void nfs4_lock_release(void *calldata)
5312{
5313 struct nfs4_lockdata *data = calldata;
5314
3110ff80 5315 dprintk("%s: begin!\n", __func__);
2f74c0a0 5316 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5317 if (data->cancelled != 0) {
5318 struct rpc_task *task;
5319 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5320 data->arg.lock_seqid);
5321 if (!IS_ERR(task))
bf294b41 5322 rpc_put_task_async(task);
3110ff80 5323 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5324 } else
5325 nfs_free_seqid(data->arg.lock_seqid);
5326 nfs4_put_lock_state(data->lsp);
5327 put_nfs_open_context(data->ctx);
5328 kfree(data);
3110ff80 5329 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5330}
5331
5332static const struct rpc_call_ops nfs4_lock_ops = {
5333 .rpc_call_prepare = nfs4_lock_prepare,
5334 .rpc_call_done = nfs4_lock_done,
5335 .rpc_release = nfs4_lock_release,
5336};
5337
2bee72a6
TM		 5338static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5339{
2bee72a6
TM		 5340 switch (error) {
5341 case -NFS4ERR_ADMIN_REVOKED:
5342 case -NFS4ERR_BAD_STATEID:
ecac799a 5343 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5344 if (new_lock_owner != 0 ||
795a88c9 5345 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5346 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5347 break;
5348 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5349 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5350 case -NFS4ERR_EXPIRED:
5351 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5352 };
5353}
5354
afe6c27c 5355static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5356{
5357 struct nfs4_lockdata *data;
5358 struct rpc_task *task;
5138fde0
TM		 5359 struct rpc_message msg = {
5360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5361 .rpc_cred = state->owner->so_cred,
5362 };
c970aa85
TM		 5363 struct rpc_task_setup task_setup_data = {
5364 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5365 .rpc_message = &msg,
c970aa85 5366 .callback_ops = &nfs4_lock_ops,
101070ca 5367 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5368 .flags = RPC_TASK_ASYNC,
5369 };
a5d16a4d
TM		 5370 int ret;
5371
3110ff80 5372 dprintk("%s: begin!\n", __func__);
cd3758e3 5373 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5374 fl->fl_u.nfs4_fl.owner,
5375 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5376 if (data == NULL)
5377 return -ENOMEM;
5378 if (IS_SETLKW(cmd))
5379 data->arg.block = 1;
9d12b216 5380 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5381 msg.rpc_argp = &data->arg;
5382 msg.rpc_resp = &data->res;
c970aa85 5383 task_setup_data.callback_data = data;
8fe72bac
TM		 5384 if (recovery_type > NFS_LOCK_NEW) {
5385 if (recovery_type == NFS_LOCK_RECLAIM)
5386 data->arg.reclaim = NFS_LOCK_RECLAIM;
5387 nfs4_set_sequence_privileged(&data->arg.seq_args);
5388 }
c970aa85 5389 task = rpc_run_task(&task_setup_data);
7a1218a2 5390 if (IS_ERR(task))
a5d16a4d 5391 return PTR_ERR(task);
a5d16a4d
TM		 5392 ret = nfs4_wait_for_completion_rpc_task(task);
5393 if (ret == 0) {
5394 ret = data->rpc_status;
2bee72a6
TM		 5395 if (ret)
5396 nfs4_handle_setlk_error(data->server, data->lsp,
5397 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5398 } else
5399 data->cancelled = 1;
e6b3c4db 5400 rpc_put_task(task);
3110ff80 5401 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5402 return ret;
1da177e4
LT		 5403}
5404
5405static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5406{
202b50dc 5407 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5408 struct nfs4_exception exception = {
5409 .inode = state->inode,
5410 };
202b50dc
TM		 5411 int err;
5412
5413 do {
42a2d13e
TM		 5414 /* Cache the lock if possible... */
5415 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5416 return 0;
afe6c27c 5417 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5418 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5419 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5420 break;
5421 nfs4_handle_exception(server, err, &exception);
5422 } while (exception.retry);
5423 return err;
1da177e4
LT		 5424}
5425
5426static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5427{
202b50dc 5428 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5429 struct nfs4_exception exception = {
5430 .inode = state->inode,
5431 };
202b50dc
TM		 5432 int err;
5433
6bfc93ef
TM		 5434 err = nfs4_set_lock_state(state, request);
5435 if (err != 0)
5436 return err;
202b50dc 5437 do {
42a2d13e
TM		 5438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5439 return 0;
afe6c27c 5440 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5441 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5442 switch (err) {
5443 default:
5444 goto out;
5445 case -NFS4ERR_GRACE:
5446 case -NFS4ERR_DELAY:
5447 nfs4_handle_exception(server, err, &exception);
5448 err = 0;
5449 }
202b50dc 5450 } while (exception.retry);
a9ed2e25 5451out:
202b50dc 5452 return err;
1da177e4
LT		 5453}
5454
f062eb6c 5455#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5456/**
5457 * nfs41_check_expired_locks - possibly free a lock stateid
5458 *
5459 * @state: NFSv4 state for an inode
5460 *
5461 * Returns NFS_OK if recovery for this stateid is now finished.
5462 * Otherwise a negative NFS4ERR value is returned.
5463 */
b01dd1d8 5464static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5465{
eb64cf96 5466 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5467 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5468 struct nfs_server *server = NFS_SERVER(state->inode);
5469
b01dd1d8 5470 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5471 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5472 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5473
5474 status = nfs41_test_stateid(server,
5475 &lsp->ls_stateid,
5476 cred);
08cb47fa 5477 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5478 if (status != NFS_OK) {
3e60ffdd
CL		 5479 /* Free the stateid unless the server
5480 * informs us the stateid is unrecognized. */
89af2739
CL		 5481 if (status != -NFS4ERR_BAD_STATEID)
5482 nfs41_free_stateid(server,
ab7cb0df
TM		 5483 &lsp->ls_stateid,
5484 cred);
795a88c9 5485 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5486 ret = status;
5487 }
5488 }
5489 };
5490
5491 return ret;
5492}
5493
5494static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5495{
5496 int status = NFS_OK;
5497
5498 if (test_bit(LK_STATE_IN_USE, &state->flags))
5499 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5500 if (status != NFS_OK)
5501 status = nfs4_lock_expired(state, request);
5502 return status;
f062eb6c
BS		 5503}
5504#endif
5505
1da177e4
LT		 5506static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5507{
9a99af49 5508 struct nfs4_state_owner *sp = state->owner;
19e03c57 5509 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5510 unsigned char fl_flags = request->fl_flags;
9a99af49 5511 unsigned int seq;
8e469ebd 5512 int status = -ENOLCK;
1da177e4 5513
8e469ebd
TM		 5514 if ((fl_flags & FL_POSIX) &&
5515 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5516 goto out;
6bfc93ef 5517 /* Is this a delegated open? */
6bfc93ef
TM		 5518 status = nfs4_set_lock_state(state, request);
5519 if (status != 0)
5520 goto out;
01c3b861
TM		 5521 request->fl_flags |= FL_ACCESS;
5522 status = do_vfs_lock(request->fl_file, request);
5523 if (status < 0)
5524 goto out;
19e03c57 5525 down_read(&nfsi->rwsem);
01c3b861 5526 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5527 /* Yes: cache locks! */
01c3b861 5528 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5529 request->fl_flags = fl_flags & ~FL_SLEEP;
5530 status = do_vfs_lock(request->fl_file, request);
5531 goto out_unlock;
01c3b861 5532 }
9a99af49
TM		 5533 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5534 up_read(&nfsi->rwsem);
afe6c27c 5535 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5536 if (status != 0)
9a99af49
TM		 5537 goto out;
5538 down_read(&nfsi->rwsem);
5539 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5540 status = -NFS4ERR_DELAY;
01c3b861 5541 goto out_unlock;
9a99af49 5542 }
6bfc93ef 5543 /* Note: we always want to sleep here! */
01c3b861 5544 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5545 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5546 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5547 "manager!\n", __func__);
01c3b861 5548out_unlock:
19e03c57 5549 up_read(&nfsi->rwsem);
01c3b861
TM		 5550out:
5551 request->fl_flags = fl_flags;
1da177e4
LT		 5552 return status;
5553}
5554
5555static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5556{
a1d0b5ee
TM		 5557 struct nfs4_exception exception = {
5558 .state = state,
05ffe24f 5559 .inode = state->inode,
a1d0b5ee 5560 };
1da177e4
LT		 5561 int err;
5562
5563 do {
965b5d67 5564 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5565 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5566 if (err == -NFS4ERR_DENIED)
5567 err = -EAGAIN;
1da177e4 5568 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5569 err, &exception);
1da177e4
LT		 5570 } while (exception.retry);
5571 return err;
5572}
5573
5574static int
5575nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5576{
5577 struct nfs_open_context *ctx;
5578 struct nfs4_state *state;
5579 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5580 int status;
5581
5582 /* verify open state */
cd3758e3 5583 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5584 state = ctx->state;
5585
5586 if (request->fl_start < 0 || request->fl_end < 0)
5587 return -EINVAL;
5588
d953126a
TM		 5589 if (IS_GETLK(cmd)) {
5590 if (state != NULL)
5591 return nfs4_proc_getlk(state, F_GETLK, request);
5592 return 0;
5593 }
1da177e4
LT		 5594
5595 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5596 return -EINVAL;
5597
d953126a
TM		 5598 if (request->fl_type == F_UNLCK) {
5599 if (state != NULL)
5600 return nfs4_proc_unlck(state, cmd, request);
5601 return 0;
5602 }
1da177e4 5603
d953126a
TM		 5604 if (state == NULL)
5605 return -ENOLCK;
55725513
TM		 5606 /*
5607 * Don't rely on the VFS having checked the file open mode,
5608 * since it won't do this for flock() locks.
5609 */
f44106e2 5610 switch (request->fl_type) {
55725513
TM		 5611 case F_RDLCK:
5612 if (!(filp->f_mode & FMODE_READ))
5613 return -EBADF;
5614 break;
5615 case F_WRLCK:
5616 if (!(filp->f_mode & FMODE_WRITE))
5617 return -EBADF;
5618 }
5619
1da177e4
LT		 5620 do {
5621 status = nfs4_proc_setlk(state, cmd, request);
5622 if ((status != -EAGAIN) || IS_SETLK(cmd))
5623 break;
5624 timeout = nfs4_set_lock_task_retry(timeout);
5625 status = -ERESTARTSYS;
5626 if (signalled())
5627 break;
5628 } while(status < 0);
1da177e4
LT		 5629 return status;
5630}
5631
db4f2e63 5632int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5633{
5634 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5635 int err;
5636
5637 err = nfs4_set_lock_state(state, fl);
5638 if (err != 0)
db4f2e63 5639 return err;
4a706fa0 5640 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5641 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5642}
6b3b5496 5643
cf470c3e
TM		 5644struct nfs_release_lockowner_data {
5645 struct nfs4_lock_state *lsp;
5ae67c4f 5646 struct nfs_server *server;
cf470c3e
TM		 5647 struct nfs_release_lockowner_args args;
5648};
5649
d3c7b7cc
TM		 5650static void nfs4_release_lockowner_release(void *calldata)
5651{
cf470c3e 5652 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5653 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5654 kfree(calldata);
5655}
5656
17280175 5657static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5658 .rpc_release = nfs4_release_lockowner_release,
5659};
5660
c8b2d0bf 5661static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5662{
cf470c3e 5663 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5664 struct rpc_message msg = {
5665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5666 };
5667
5668 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5669 return -EINVAL;
5670 data = kmalloc(sizeof(*data), GFP_NOFS);
5671 if (!data)
5672 return -ENOMEM;
5673 data->lsp = lsp;
5ae67c4f 5674 data->server = server;
cf470c3e
TM		 5675 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5676 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5677 data->args.lock_owner.s_dev = server->s_dev;
5678 msg.rpc_argp = &data->args;
5679 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5680 return 0;
d3c7b7cc
TM		 5681}
5682
aa1870af
BF		 5683#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5684
64c2ce8b
AK		 5685static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5686 const void *buf, size_t buflen,
5687 int flags, int type)
6b3b5496 5688{
64c2ce8b
AK		 5689 if (strcmp(key, "") != 0)
5690 return -EINVAL;
4b580ee3 5691
64c2ce8b 5692 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5693}
5694
64c2ce8b
AK		 5695static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5696 void *buf, size_t buflen, int type)
6b3b5496 5697{
64c2ce8b
AK		 5698 if (strcmp(key, "") != 0)
5699 return -EINVAL;
aa1870af 5700
64c2ce8b 5701 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5702}
5703
64c2ce8b
AK		 5704static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5705 size_t list_len, const char *name,
5706 size_t name_len, int type)
6b3b5496 5707{
64c2ce8b 5708 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5709
096455a2
BF		 5710 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5711 return 0;
64c2ce8b
AK		 5712
5713 if (list && len <= list_len)
5714 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5715 return len;
6b3b5496
BF		 5716}
5717
c9bccef6
DQ		 5718#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5719static inline int nfs4_server_supports_labels(struct nfs_server *server)
5720{
5721 return server->caps & NFS_CAP_SECURITY_LABEL;
5722}
5723
5724static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5725 const void *buf, size_t buflen,
5726 int flags, int type)
5727{
5728 if (security_ismaclabel(key))
5729 return nfs4_set_security_label(dentry, buf, buflen);
5730
5731 return -EOPNOTSUPP;
5732}
5733
5734static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5735 void *buf, size_t buflen, int type)
5736{
5737 if (security_ismaclabel(key))
5738 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5739 return -EOPNOTSUPP;
5740}
5741
5742static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5743 size_t list_len, const char *name,
5744 size_t name_len, int type)
5745{
5746 size_t len = 0;
5747
5748 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5749 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5750 if (list && len <= list_len)
5751 security_inode_listsecurity(dentry->d_inode, list, len);
5752 }
5753 return len;
5754}
5755
5756static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5757 .prefix = XATTR_SECURITY_PREFIX,
5758 .list = nfs4_xattr_list_nfs4_label,
5759 .get = nfs4_xattr_get_nfs4_label,
5760 .set = nfs4_xattr_set_nfs4_label,
5761};
5762#endif
5763
5764
533eb461
AA		 5765/*
5766 * nfs_fhget will use either the mounted_on_fileid or the fileid
5767 */
69aaaae1
TM		 5768static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5769{
533eb461
AA		 5770 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5771 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5772 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5773 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5774 return;
5775
5776 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5777 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5778 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5779 fattr->nlink = 2;
5780}
5781
f05d147f
BS		 5782static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5783 const struct qstr *name,
5784 struct nfs4_fs_locations *fs_locations,
5785 struct page *page)
683b57b4
TM		 5786{
5787 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5788 u32 bitmask[3] = {
361e624f 5789 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5790 };
5791 struct nfs4_fs_locations_arg args = {
5792 .dir_fh = NFS_FH(dir),
c228fd3a 5793 .name = name,
683b57b4
TM		 5794 .page = page,
5795 .bitmask = bitmask,
5796 };
22958463
BH		 5797 struct nfs4_fs_locations_res res = {
5798 .fs_locations = fs_locations,
5799 };
683b57b4
TM		 5800 struct rpc_message msg = {
5801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5802 .rpc_argp = &args,
22958463 5803 .rpc_resp = &res,
683b57b4
TM		 5804 };
5805 int status;
5806
3110ff80 5807 dprintk("%s: start\n", __func__);
533eb461
AA		 5808
5809 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5810 * is not supported */
5811 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5812 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5813 else
5814 bitmask[0] |= FATTR4_WORD0_FILEID;
5815
c228fd3a 5816 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5817 fs_locations->server = server;
830b8e33 5818 fs_locations->nlocations = 0;
f05d147f 5819 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5820 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5821 return status;
5822}
5823
f05d147f
BS		 5824int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5825 const struct qstr *name,
5826 struct nfs4_fs_locations *fs_locations,
5827 struct page *page)
db0a9593
BS		 5828{
5829 struct nfs4_exception exception = { };
5830 int err;
5831 do {
078ea3df
TM		 5832 err = _nfs4_proc_fs_locations(client, dir, name,
5833 fs_locations, page);
5834 trace_nfs4_get_fs_locations(dir, name, err);
5835 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5836 &exception);
5837 } while (exception.retry);
5838 return err;
5839}
5840
5ec16a85
AA		 5841/**
5842 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
5843 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
5844 */
5a5ea0d4
BS		 5845static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5846{
5847 int status;
5848 struct nfs4_secinfo_arg args = {
5849 .dir_fh = NFS_FH(dir),
5850 .name = name,
5851 };
5852 struct nfs4_secinfo_res res = {
5853 .flavors = flavors,
5854 };
5855 struct rpc_message msg = {
5856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5857 .rpc_argp = &args,
5858 .rpc_resp = &res,
5859 };
5ec16a85 5860 struct rpc_clnt *clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5a5ea0d4
BS		 5861
5862 dprintk("NFS call secinfo %s\n", name->name);
5ec16a85 5863 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5a5ea0d4
BS		 5864 dprintk("NFS reply secinfo: %d\n", status);
5865 return status;
5866}
5867
72de53ec
BS		 5868int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5869 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5870{
5871 struct nfs4_exception exception = { };
5872 int err;
5873 do {
078ea3df
TM		 5874 err = _nfs4_proc_secinfo(dir, name, flavors);
5875 trace_nfs4_secinfo(dir, name, err);
5876 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5877 &exception);
5878 } while (exception.retry);
5879 return err;
5880}
5881
557134a3 5882#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5883/*
5884 * Check the exchange flags returned by the server for invalid flags, having
5885 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5886 * DS flags set.
5887 */
5888static int nfs4_check_cl_exchange_flags(u32 flags)
5889{
5890 if (flags & ~EXCHGID4_FLAG_MASK_R)
5891 goto out_inval;
5892 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5893 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5894 goto out_inval;
5895 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5896 goto out_inval;
5897 return NFS_OK;
5898out_inval:
5899 return -NFS4ERR_INVAL;
5900}
5901
78fe0f41 5902static bool
79d4e1f0
CL		 5903nfs41_same_server_scope(struct nfs41_server_scope *a,
5904 struct nfs41_server_scope *b)
78fe0f41
WAA		 5905{
5906 if (a->server_scope_sz == b->server_scope_sz &&
5907 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5908 return true;
5909
5910 return false;
5911}
5912
7c44f1ae
WAA		 5913/*
5914 * nfs4_proc_bind_conn_to_session()
5915 *
5916 * The 4.1 client currently uses the same TCP connection for the
5917 * fore and backchannel.
5918 */
2cf047c9 5919int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5920{
5921 int status;
5922 struct nfs41_bind_conn_to_session_res res;
5923 struct rpc_message msg = {
5924 .rpc_proc =
5925 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5926 .rpc_argp = clp,
5927 .rpc_resp = &res,
2cf047c9 5928 .rpc_cred = cred,
7c44f1ae
WAA		 5929 };
5930
5931 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5932
5933 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5934 if (unlikely(res.session == NULL)) {
5935 status = -ENOMEM;
5936 goto out;
5937 }
5938
5939 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5940 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5941 if (status == 0) {
5942 if (memcmp(res.session->sess_id.data,
5943 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5944 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5945 status = -EIO;
5946 goto out_session;
5947 }
5948 if (res.dir != NFS4_CDFS4_BOTH) {
5949 dprintk("NFS: %s: Unexpected direction from server\n",
5950 __func__);
5951 status = -EIO;
5952 goto out_session;
5953 }
5954 if (res.use_conn_in_rdma_mode) {
5955 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5956 __func__);
5957 status = -EIO;
5958 goto out_session;
5959 }
5960 }
5961out_session:
5962 kfree(res.session);
5963out:
5964 dprintk("<-- %s status= %d\n", __func__, status);
5965 return status;
5966}
5967
99fe60d0
BH		 5968/*
5969 * nfs4_proc_exchange_id()
5970 *
6bbb4ae8
CL		 5971 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5972 *
99fe60d0
BH		 5973 * Since the clientid has expired, all compounds using sessions
5974 * associated with the stale clientid will be returning
5975 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5976 * be in some phase of session reset.
5977 */
4d643d1d 5978int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5979{
5980 nfs4_verifier verifier;
5981 struct nfs41_exchange_id_args args = {
cd93710e 5982 .verifier = &verifier,
99fe60d0 5983 .client = clp,
4f0b429d
TM		 5984 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
5985 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 5986 };
5987 struct nfs41_exchange_id_res res = {
32b01310 5988 0
99fe60d0
BH		 5989 };
5990 int status;
5991 struct rpc_message msg = {
5992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5993 .rpc_argp = &args,
5994 .rpc_resp = &res,
5995 .rpc_cred = cred,
5996 };
99fe60d0 5997
f092075d 5998 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5999 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6000 sizeof(args.id));
6bbb4ae8
CL		 6001 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6002 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6003 args.id_len, args.id);
99fe60d0 6004
acdeb69d 6005 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6006 GFP_NOFS);
acdeb69d 6007 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6008 status = -ENOMEM;
6009 goto out;
6010 }
78fe0f41 6011
79d4e1f0 6012 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6013 GFP_NOFS);
177313f1 6014 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6015 status = -ENOMEM;
acdeb69d 6016 goto out_server_owner;
abe9a6d5 6017 }
78fe0f41 6018
bbafffd2 6019 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6020 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6021 status = -ENOMEM;
6022 goto out_server_scope;
6023 }
6024
1bd714f2 6025 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6026 trace_nfs4_exchange_id(clp, status);
177313f1 6027 if (status == 0)
32b01310 6028 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6029
acdeb69d 6030 if (status == 0) {
32b01310
TM		 6031 clp->cl_clientid = res.clientid;
6032 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6033 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6034 clp->cl_seqid = res.seqid;
6035
acdeb69d
CL		 6036 kfree(clp->cl_serverowner);
6037 clp->cl_serverowner = res.server_owner;
6038 res.server_owner = NULL;
78fe0f41 6039
7d2ed9ac 6040 /* use the most recent implementation id */
59155546
CL		 6041 kfree(clp->cl_implid);
6042 clp->cl_implid = res.impl_id;
7d2ed9ac 6043
177313f1 6044 if (clp->cl_serverscope != NULL &&
79d4e1f0 6045 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6046 res.server_scope)) {
6047 dprintk("%s: server_scope mismatch detected\n",
6048 __func__);
6049 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6050 kfree(clp->cl_serverscope);
6051 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6052 }
6053
177313f1 6054 if (clp->cl_serverscope == NULL) {
79d4e1f0 6055 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6056 goto out;
6057 }
32b01310
TM		 6058 } else
6059 kfree(res.impl_id);
7d2ed9ac 6060
acdeb69d
CL		 6061out_server_owner:
6062 kfree(res.server_owner);
7d2ed9ac 6063out_server_scope:
abe9a6d5
WAA		 6064 kfree(res.server_scope);
6065out:
177313f1 6066 if (clp->cl_implid != NULL)
6bbb4ae8 6067 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6068 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6069 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6070 clp->cl_implid->date.seconds,
6071 clp->cl_implid->date.nseconds);
6bbb4ae8 6072 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6073 return status;
6074}
6075
66245539
TM		 6076static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6077 struct rpc_cred *cred)
6078{
6079 struct rpc_message msg = {
6080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6081 .rpc_argp = clp,
6082 .rpc_cred = cred,
6083 };
6084 int status;
6085
6086 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6087 trace_nfs4_destroy_clientid(clp, status);
66245539 6088 if (status)
02c67525 6089 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6090 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6091 return status;
6092}
6093
6094static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6095 struct rpc_cred *cred)
6096{
6097 unsigned int loop;
6098 int ret;
6099
6100 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6101 ret = _nfs4_proc_destroy_clientid(clp, cred);
6102 switch (ret) {
6103 case -NFS4ERR_DELAY:
6104 case -NFS4ERR_CLIENTID_BUSY:
6105 ssleep(1);
6106 break;
6107 default:
6108 return ret;
6109 }
6110 }
6111 return 0;
6112}
6113
6114int nfs4_destroy_clientid(struct nfs_client *clp)
6115{
6116 struct rpc_cred *cred;
6117 int ret = 0;
6118
6119 if (clp->cl_mvops->minor_version < 1)
6120 goto out;
6121 if (clp->cl_exchange_flags == 0)
6122 goto out;
05f4c350
CL		 6123 if (clp->cl_preserve_clid)
6124 goto out;
73d8bde5 6125 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6126 ret = nfs4_proc_destroy_clientid(clp, cred);
6127 if (cred)
6128 put_rpccred(cred);
6129 switch (ret) {
6130 case 0:
6131 case -NFS4ERR_STALE_CLIENTID:
6132 clp->cl_exchange_flags = 0;
6133 }
6134out:
6135 return ret;
6136}
6137
2050f0cc
AA		 6138struct nfs4_get_lease_time_data {
6139 struct nfs4_get_lease_time_args *args;
6140 struct nfs4_get_lease_time_res *res;
6141 struct nfs_client *clp;
6142};
6143
6144static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6145 void *calldata)
6146{
2050f0cc
AA		 6147 struct nfs4_get_lease_time_data *data =
6148 (struct nfs4_get_lease_time_data *)calldata;
6149
6150 dprintk("--> %s\n", __func__);
6151 /* just setup sequence, do not trigger session recovery
6152 since we're invoked within one */
d9afbd1b
TM		 6153 nfs41_setup_sequence(data->clp->cl_session,
6154 &data->args->la_seq_args,
6155 &data->res->lr_seq_res,
6156 task);
2050f0cc
AA		 6157 dprintk("<-- %s\n", __func__);
6158}
6159
6160/*
6161 * Called from nfs4_state_manager thread for session setup, so don't recover
6162 * from sequence operation or clientid errors.
6163 */
6164static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6165{
6166 struct nfs4_get_lease_time_data *data =
6167 (struct nfs4_get_lease_time_data *)calldata;
6168
6169 dprintk("--> %s\n", __func__);
14516c3a
TM		 6170 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6171 return;
2050f0cc
AA		 6172 switch (task->tk_status) {
6173 case -NFS4ERR_DELAY:
6174 case -NFS4ERR_GRACE:
6175 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6176 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6177 task->tk_status = 0;
a8a4ae3a
AA		 6178 /* fall through */
6179 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6180 rpc_restart_call_prepare(task);
2050f0cc
AA		 6181 return;
6182 }
2050f0cc
AA		 6183 dprintk("<-- %s\n", __func__);
6184}
6185
17280175 6186static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6187 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6188 .rpc_call_done = nfs4_get_lease_time_done,
6189};
6190
6191int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6192{
6193 struct rpc_task *task;
6194 struct nfs4_get_lease_time_args args;
6195 struct nfs4_get_lease_time_res res = {
6196 .lr_fsinfo = fsinfo,
6197 };
6198 struct nfs4_get_lease_time_data data = {
6199 .args = &args,
6200 .res = &res,
6201 .clp = clp,
6202 };
6203 struct rpc_message msg = {
6204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6205 .rpc_argp = &args,
6206 .rpc_resp = &res,
6207 };
6208 struct rpc_task_setup task_setup = {
6209 .rpc_client = clp->cl_rpcclient,
6210 .rpc_message = &msg,
6211 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6212 .callback_data = &data,
6213 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6214 };
6215 int status;
6216
9d12b216 6217 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6218 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6219 dprintk("--> %s\n", __func__);
6220 task = rpc_run_task(&task_setup);
6221
6222 if (IS_ERR(task))
6223 status = PTR_ERR(task);
6224 else {
6225 status = task->tk_status;
6226 rpc_put_task(task);
6227 }
6228 dprintk("<-- %s return %d\n", __func__, status);
6229
6230 return status;
6231}
6232
fc931582
AA		 6233/*
6234 * Initialize the values to be used by the client in CREATE_SESSION
6235 * If nfs4_init_session set the fore channel request and response sizes,
6236 * use them.
6237 *
6238 * Set the back channel max_resp_sz_cached to zero to force the client to
6239 * always set csa_cachethis to FALSE because the current implementation
6240 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6241 */
6242static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6243{
18aad3d5
AA		 6244 unsigned int max_rqst_sz, max_resp_sz;
6245
6246 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6247 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6248
fc931582 6249 /* Fore channel attributes */
18aad3d5
AA		 6250 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6251 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6252 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6253 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6254
6255 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6256 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6257 __func__,
6258 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6259 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6260
6261 /* Back channel attributes */
fc931582
AA		 6262 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6263 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6264 args->bc_attrs.max_resp_sz_cached = 0;
6265 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6266 args->bc_attrs.max_reqs = 1;
6267
6268 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6269 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6270 __func__,
6271 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6272 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6273 args->bc_attrs.max_reqs);
6274}
6275
43c2e885 6276static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6277{
43c2e885
BF		 6278 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6279 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6280
43c2e885
BF		 6281 if (rcvd->max_resp_sz > sent->max_resp_sz)
6282 return -EINVAL;
6283 /*
6284 * Our requested max_ops is the minimum we need; we're not
6285 * prepared to break up compounds into smaller pieces than that.
6286 * So, no point even trying to continue if the server won't
6287 * cooperate:
6288 */
6289 if (rcvd->max_ops < sent->max_ops)
6290 return -EINVAL;
6291 if (rcvd->max_reqs == 0)
6292 return -EINVAL;
b4b9a0c1
VG		 6293 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6294 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6295 return 0;
8d35301d
AA		 6296}
6297
43c2e885
BF		 6298static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6299{
6300 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6301 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6302
43c2e885
BF		 6303 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6304 return -EINVAL;
6305 if (rcvd->max_resp_sz < sent->max_resp_sz)
6306 return -EINVAL;
6307 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6308 return -EINVAL;
6309 /* These would render the backchannel useless: */
b4b9a0c1 6310 if (rcvd->max_ops != sent->max_ops)
43c2e885 6311 return -EINVAL;
b4b9a0c1 6312 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6313 return -EINVAL;
6314 return 0;
6315}
8d35301d 6316
8d35301d
AA		 6317static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6318 struct nfs4_session *session)
6319{
43c2e885 6320 int ret;
8d35301d 6321
43c2e885
BF		 6322 ret = nfs4_verify_fore_channel_attrs(args, session);
6323 if (ret)
6324 return ret;
6325 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6326}
6327
848f5bda
TM		 6328static int _nfs4_proc_create_session(struct nfs_client *clp,
6329 struct rpc_cred *cred)
fc931582
AA		 6330{
6331 struct nfs4_session *session = clp->cl_session;
6332 struct nfs41_create_session_args args = {
6333 .client = clp,
6334 .cb_program = NFS4_CALLBACK,
6335 };
6336 struct nfs41_create_session_res res = {
6337 .client = clp,
6338 };
6339 struct rpc_message msg = {
6340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6341 .rpc_argp = &args,
6342 .rpc_resp = &res,
848f5bda 6343 .rpc_cred = cred,
fc931582
AA		 6344 };
6345 int status;
6346
6347 nfs4_init_channel_attrs(&args);
0f91421e 6348 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6349
1bd714f2 6350 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6351 trace_nfs4_create_session(clp, status);
fc931582 6352
43095d39 6353 if (!status) {
8d35301d
AA		 6354 /* Verify the session's negotiated channel_attrs values */
6355 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6356 /* Increment the clientid slot sequence id */
6357 clp->cl_seqid++;
6358 }
6359
6360 return status;
6361}
6362
6363/*
6364 * Issues a CREATE_SESSION operation to the server.
6365 * It is the responsibility of the caller to verify the session is
6366 * expired before calling this routine.
6367 */
848f5bda 6368int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6369{
6370 int status;
6371 unsigned *ptr;
fc931582
AA		 6372 struct nfs4_session *session = clp->cl_session;
6373
6374 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6375
848f5bda 6376 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6377 if (status)
6378 goto out;
6379
aacd5537
AA		 6380 /* Init or reset the session slot tables */
6381 status = nfs4_setup_session_slot_tables(session);
6382 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6383 if (status)
6384 goto out;
6385
6386 ptr = (unsigned *)&session->sess_id.data[0];
6387 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6388 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6389out:
6390 dprintk("<-- %s\n", __func__);
6391 return status;
6392}
6393
0f3e66c6
AA		 6394/*
6395 * Issue the over-the-wire RPC DESTROY_SESSION.
6396 * The caller must serialize access to this routine.
6397 */
848f5bda
TM		 6398int nfs4_proc_destroy_session(struct nfs4_session *session,
6399 struct rpc_cred *cred)
0f3e66c6 6400{
848f5bda
TM		 6401 struct rpc_message msg = {
6402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6403 .rpc_argp = session,
6404 .rpc_cred = cred,
6405 };
0f3e66c6 6406 int status = 0;
0f3e66c6
AA		 6407
6408 dprintk("--> nfs4_proc_destroy_session\n");
6409
6410 /* session is still being setup */
6411 if (session->clp->cl_cons_state != NFS_CS_READY)
6412 return status;
6413
1bd714f2 6414 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6415 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6416
6417 if (status)
08106ac7 6418 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6419 "Session has been destroyed regardless...\n", status);
6420
6421 dprintk("<-- nfs4_proc_destroy_session\n");
6422 return status;
6423}
6424
fc01cea9
AA		 6425/*
6426 * Renew the cl_session lease.
6427 */
d5f8d3fe
TM		 6428struct nfs4_sequence_data {
6429 struct nfs_client *clp;
6430 struct nfs4_sequence_args args;
6431 struct nfs4_sequence_res res;
6432};
6433
dc96aef9
AB		 6434static void nfs41_sequence_release(void *data)
6435{
d5f8d3fe
TM		 6436 struct nfs4_sequence_data *calldata = data;
6437 struct nfs_client *clp = calldata->clp;
dc96aef9 6438
7135840f
AB		 6439 if (atomic_read(&clp->cl_count) > 1)
6440 nfs4_schedule_state_renewal(clp);
6441 nfs_put_client(clp);
d5f8d3fe 6442 kfree(calldata);
dc96aef9
AB		 6443}
6444
aa5190d0
TM		 6445static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6446{
6447 switch(task->tk_status) {
6448 case -NFS4ERR_DELAY:
aa5190d0
TM		 6449 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6450 return -EAGAIN;
6451 default:
0400a6b0 6452 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6453 }
6454 return 0;
6455}
6456
dc96aef9 6457static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6458{
d5f8d3fe
TM		 6459 struct nfs4_sequence_data *calldata = data;
6460 struct nfs_client *clp = calldata->clp;
fc01cea9 6461
14516c3a
TM		 6462 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6463 return;
fc01cea9 6464
c6d01c6f 6465 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6466 if (task->tk_status < 0) {
6467 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6468 if (atomic_read(&clp->cl_count) == 1)
6469 goto out;
fc01cea9 6470
aa5190d0
TM		 6471 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6472 rpc_restart_call_prepare(task);
fc01cea9
AA		 6473 return;
6474 }
6475 }
fc01cea9 6476 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6477out:
fc01cea9
AA		 6478 dprintk("<-- %s\n", __func__);
6479}
6480
6481static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6482{
d5f8d3fe
TM		 6483 struct nfs4_sequence_data *calldata = data;
6484 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6485 struct nfs4_sequence_args *args;
6486 struct nfs4_sequence_res *res;
6487
fc01cea9
AA		 6488 args = task->tk_msg.rpc_argp;
6489 res = task->tk_msg.rpc_resp;
6490
d9afbd1b 6491 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6492}
6493
6494static const struct rpc_call_ops nfs41_sequence_ops = {
6495 .rpc_call_done = nfs41_sequence_call_done,
6496 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6497 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6498};
6499
8fe72bac
TM		 6500static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6501 struct rpc_cred *cred,
6502 bool is_privileged)
fc01cea9 6503{
d5f8d3fe 6504 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6505 struct rpc_message msg = {
6506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6507 .rpc_cred = cred,
6508 };
71ac6da9
TM		 6509 struct rpc_task_setup task_setup_data = {
6510 .rpc_client = clp->cl_rpcclient,
6511 .rpc_message = &msg,
8fe72bac 6512 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6513 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6514 };
fc01cea9 6515
7135840f 6516 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6517 return ERR_PTR(-EIO);
dfb4f309 6518 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6519 if (calldata == NULL) {
7135840f 6520 nfs_put_client(clp);
71ac6da9 6521 return ERR_PTR(-ENOMEM);
fc01cea9 6522 }
9d12b216 6523 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6524 if (is_privileged)
6525 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6526 msg.rpc_argp = &calldata->args;
6527 msg.rpc_resp = &calldata->res;
6528 calldata->clp = clp;
71ac6da9 6529 task_setup_data.callback_data = calldata;
fc01cea9 6530
71ac6da9
TM		 6531 return rpc_run_task(&task_setup_data);
6532}
6533
2f60ea6b 6534static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6535{
6536 struct rpc_task *task;
6537 int ret = 0;
6538
2f60ea6b
TM		 6539 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6540 return 0;
8fe72bac 6541 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6542 if (IS_ERR(task))
6543 ret = PTR_ERR(task);
6544 else
bf294b41 6545 rpc_put_task_async(task);
71ac6da9
TM		 6546 dprintk("<-- %s status=%d\n", __func__, ret);
6547 return ret;
6548}
6549
6550static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6551{
6552 struct rpc_task *task;
6553 int ret;
6554
8fe72bac 6555 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6556 if (IS_ERR(task)) {
6557 ret = PTR_ERR(task);
6558 goto out;
6559 }
6560 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6561 if (!ret) {
6562 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6563
6564 if (task->tk_status == 0)
6565 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6566 ret = task->tk_status;
b4410c2f 6567 }
71ac6da9
TM		 6568 rpc_put_task(task);
6569out:
6570 dprintk("<-- %s status=%d\n", __func__, ret);
6571 return ret;
fc01cea9
AA		 6572}
6573
fce5c838
RL		 6574struct nfs4_reclaim_complete_data {
6575 struct nfs_client *clp;
6576 struct nfs41_reclaim_complete_args arg;
6577 struct nfs41_reclaim_complete_res res;
6578};
6579
6580static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6581{
6582 struct nfs4_reclaim_complete_data *calldata = data;
6583
d9afbd1b
TM		 6584 nfs41_setup_sequence(calldata->clp->cl_session,
6585 &calldata->arg.seq_args,
6586 &calldata->res.seq_res,
6587 task);
fce5c838
RL		 6588}
6589
aa5190d0
TM		 6590static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6591{
6592 switch(task->tk_status) {
6593 case 0:
6594 case -NFS4ERR_COMPLETE_ALREADY:
6595 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6596 break;
6597 case -NFS4ERR_DELAY:
aa5190d0 6598 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6599 /* fall through */
6600 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6601 return -EAGAIN;
6602 default:
0400a6b0 6603 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6604 }
6605 return 0;
6606}
6607
fce5c838
RL		 6608static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6609{
6610 struct nfs4_reclaim_complete_data *calldata = data;
6611 struct nfs_client *clp = calldata->clp;
6612 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6613
6614 dprintk("--> %s\n", __func__);
14516c3a
TM		 6615 if (!nfs41_sequence_done(task, res))
6616 return;
fce5c838 6617
c6d01c6f 6618 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6619 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6620 rpc_restart_call_prepare(task);
6621 return;
6622 }
fce5c838
RL		 6623 dprintk("<-- %s\n", __func__);
6624}
6625
6626static void nfs4_free_reclaim_complete_data(void *data)
6627{
6628 struct nfs4_reclaim_complete_data *calldata = data;
6629
6630 kfree(calldata);
6631}
6632
6633static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6634 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6635 .rpc_call_done = nfs4_reclaim_complete_done,
6636 .rpc_release = nfs4_free_reclaim_complete_data,
6637};
6638
6639/*
6640 * Issue a global reclaim complete.
6641 */
965e9c23
TM		 6642static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6643 struct rpc_cred *cred)
fce5c838
RL		 6644{
6645 struct nfs4_reclaim_complete_data *calldata;
6646 struct rpc_task *task;
6647 struct rpc_message msg = {
6648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6649 .rpc_cred = cred,
fce5c838
RL		 6650 };
6651 struct rpc_task_setup task_setup_data = {
6652 .rpc_client = clp->cl_rpcclient,
6653 .rpc_message = &msg,
6654 .callback_ops = &nfs4_reclaim_complete_call_ops,
6655 .flags = RPC_TASK_ASYNC,
6656 };
6657 int status = -ENOMEM;
6658
6659 dprintk("--> %s\n", __func__);
8535b2be 6660 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6661 if (calldata == NULL)
6662 goto out;
6663 calldata->clp = clp;
6664 calldata->arg.one_fs = 0;
fce5c838 6665
9d12b216 6666 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6667 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6668 msg.rpc_argp = &calldata->arg;
6669 msg.rpc_resp = &calldata->res;
6670 task_setup_data.callback_data = calldata;
6671 task = rpc_run_task(&task_setup_data);
acf82b85 6672 if (IS_ERR(task)) {
fce5c838 6673 status = PTR_ERR(task);
acf82b85
DC		 6674 goto out;
6675 }
c34c32ea
AA		 6676 status = nfs4_wait_for_completion_rpc_task(task);
6677 if (status == 0)
6678 status = task->tk_status;
fce5c838 6679 rpc_put_task(task);
acf82b85 6680 return 0;
fce5c838
RL		 6681out:
6682 dprintk("<-- %s status=%d\n", __func__, status);
6683 return status;
6684}
b1f69b75
AA		 6685
6686static void
6687nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6688{
6689 struct nfs4_layoutget *lgp = calldata;
c31663d4 6690 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6691 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6692
6693 dprintk("--> %s\n", __func__);
c31663d4
FI		 6694 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6695 * right now covering the LAYOUTGET we are about to send.
6696 * However, that is not so catastrophic, and there seems
6697 * to be no way to prevent it completely.
6698 */
6ba7db34 6699 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6700 &lgp->res.seq_res, task))
b1f69b75 6701 return;
cf7d63f1
FI		 6702 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6703 NFS_I(lgp->args.inode)->layout,
6704 lgp->args.ctx->state)) {
6705 rpc_exit(task, NFS4_OK);
cf7d63f1 6706 }
b1f69b75
AA		 6707}
6708
6709static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6710{
6711 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6712 struct inode *inode = lgp->args.inode;
6713 struct nfs_server *server = NFS_SERVER(inode);
6714 struct pnfs_layout_hdr *lo;
6715 struct nfs4_state *state = NULL;
30005121 6716 unsigned long timeo, giveup;
b1f69b75
AA		 6717
6718 dprintk("--> %s\n", __func__);
6719
6ba7db34 6720 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6721 goto out;
b1f69b75
AA		 6722
6723 switch (task->tk_status) {
6724 case 0:
ee314c2a 6725 goto out;
b1f69b75
AA		 6726 case -NFS4ERR_LAYOUTTRYLATER:
6727 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6728 timeo = rpc_get_timeout(task->tk_client);
6729 giveup = lgp->args.timestamp + timeo;
6730 if (time_after(giveup, jiffies))
6731 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6732 break;
6733 case -NFS4ERR_EXPIRED:
6734 case -NFS4ERR_BAD_STATEID:
6735 spin_lock(&inode->i_lock);
6736 lo = NFS_I(inode)->layout;
6737 if (!lo || list_empty(&lo->plh_segs)) {
6738 spin_unlock(&inode->i_lock);
6739 /* If the open stateid was bad, then recover it. */
6740 state = lgp->args.ctx->state;
6741 } else {
6742 LIST_HEAD(head);
6743
6744 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6745 spin_unlock(&inode->i_lock);
6746 /* Mark the bad layout state as invalid, then
6747 * retry using the open stateid. */
6748 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6749 }
6750 }
ee314c2a
TM		 6751 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6752 rpc_restart_call_prepare(task);
6753out:
b1f69b75
AA		 6754 dprintk("<-- %s\n", __func__);
6755}
6756
8554116e
IK		 6757static size_t max_response_pages(struct nfs_server *server)
6758{
6759 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6760 return nfs_page_array_len(0, max_resp_sz);
6761}
6762
6763static void nfs4_free_pages(struct page **pages, size_t size)
6764{
6765 int i;
6766
6767 if (!pages)
6768 return;
6769
6770 for (i = 0; i < size; i++) {
6771 if (!pages[i])
6772 break;
6773 __free_page(pages[i]);
6774 }
6775 kfree(pages);
6776}
6777
6778static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6779{
6780 struct page **pages;
6781 int i;
6782
6783 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6784 if (!pages) {
6785 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6786 return NULL;
6787 }
6788
6789 for (i = 0; i < size; i++) {
6790 pages[i] = alloc_page(gfp_flags);
6791 if (!pages[i]) {
6792 dprintk("%s: failed to allocate page\n", __func__);
6793 nfs4_free_pages(pages, size);
6794 return NULL;
6795 }
6796 }
6797
6798 return pages;
6799}
6800
b1f69b75
AA		 6801static void nfs4_layoutget_release(void *calldata)
6802{
6803 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6804 struct inode *inode = lgp->args.inode;
6805 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6806 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6807
6808 dprintk("--> %s\n", __func__);
8554116e 6809 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6810 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6811 put_nfs_open_context(lgp->args.ctx);
6812 kfree(calldata);
6813 dprintk("<-- %s\n", __func__);
6814}
6815
6816static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6817 .rpc_call_prepare = nfs4_layoutget_prepare,
6818 .rpc_call_done = nfs4_layoutget_done,
6819 .rpc_release = nfs4_layoutget_release,
6820};
6821
a0b0a6e3
TM		 6822struct pnfs_layout_segment *
6823nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6824{
a47970ff
WAA		 6825 struct inode *inode = lgp->args.inode;
6826 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6827 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6828 struct rpc_task *task;
6829 struct rpc_message msg = {
6830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6831 .rpc_argp = &lgp->args,
6832 .rpc_resp = &lgp->res,
6ab59344 6833 .rpc_cred = lgp->cred,
b1f69b75
AA		 6834 };
6835 struct rpc_task_setup task_setup_data = {
6836 .rpc_client = server->client,
6837 .rpc_message = &msg,
6838 .callback_ops = &nfs4_layoutget_call_ops,
6839 .callback_data = lgp,
6840 .flags = RPC_TASK_ASYNC,
6841 };
a0b0a6e3 6842 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6843 int status = 0;
6844
6845 dprintk("--> %s\n", __func__);
6846
8554116e
IK		 6847 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6848 if (!lgp->args.layout.pages) {
6849 nfs4_layoutget_release(lgp);
a0b0a6e3 6850 return ERR_PTR(-ENOMEM);
8554116e
IK		 6851 }
6852 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6853 lgp->args.timestamp = jiffies;
8554116e 6854
35124a09 6855 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6856 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6857 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6858
6859 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6860 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6861
b1f69b75
AA		 6862 task = rpc_run_task(&task_setup_data);
6863 if (IS_ERR(task))
a0b0a6e3 6864 return ERR_CAST(task);
b1f69b75 6865 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6866 if (status == 0)
6867 status = task->tk_status;
1037e6ea
TM		 6868 trace_nfs4_layoutget(lgp->args.ctx,
6869 &lgp->args.range,
6870 &lgp->res.range,
6871 status);
085b7a45
WAA		 6872 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6873 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6874 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6875 rpc_put_task(task);
6876 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6877 if (status)
6878 return ERR_PTR(status);
6879 return lseg;
b1f69b75
AA		 6880}
6881
cbe82603
BH		 6882static void
6883nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6884{
6885 struct nfs4_layoutreturn *lrp = calldata;
6886
6887 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6888 nfs41_setup_sequence(lrp->clp->cl_session,
6889 &lrp->args.seq_args,
6890 &lrp->res.seq_res,
6891 task);
cbe82603
BH		 6892}
6893
6894static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6895{
6896 struct nfs4_layoutreturn *lrp = calldata;
6897 struct nfs_server *server;
6898
6899 dprintk("--> %s\n", __func__);
6900
6ba7db34 6901 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6902 return;
6903
6904 server = NFS_SERVER(lrp->args.inode);
6905 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6906 rpc_restart_call_prepare(task);
cbe82603
BH		 6907 return;
6908 }
cbe82603
BH		 6909 dprintk("<-- %s\n", __func__);
6910}
6911
6912static void nfs4_layoutreturn_release(void *calldata)
6913{
6914 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6915 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6916
6917 dprintk("--> %s\n", __func__);
849b286f
TM		 6918 spin_lock(&lo->plh_inode->i_lock);
6919 if (lrp->res.lrs_present)
6920 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6921 lo->plh_block_lgets--;
6922 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6923 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6924 kfree(calldata);
6925 dprintk("<-- %s\n", __func__);
6926}
6927
6928static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6929 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6930 .rpc_call_done = nfs4_layoutreturn_done,
6931 .rpc_release = nfs4_layoutreturn_release,
6932};
6933
6934int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6935{
6936 struct rpc_task *task;
6937 struct rpc_message msg = {
6938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6939 .rpc_argp = &lrp->args,
6940 .rpc_resp = &lrp->res,
9556000d 6941 .rpc_cred = lrp->cred,
cbe82603
BH		 6942 };
6943 struct rpc_task_setup task_setup_data = {
1771c577 6944 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6945 .rpc_message = &msg,
6946 .callback_ops = &nfs4_layoutreturn_call_ops,
6947 .callback_data = lrp,
6948 };
6949 int status;
6950
6951 dprintk("--> %s\n", __func__);
9d12b216 6952 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6953 task = rpc_run_task(&task_setup_data);
6954 if (IS_ERR(task))
6955 return PTR_ERR(task);
6956 status = task->tk_status;
1037e6ea 6957 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 6958 dprintk("<-- %s status=%d\n", __func__, status);
6959 rpc_put_task(task);
6960 return status;
6961}
6962
7f11d8d3
AA		 6963/*
6964 * Retrieve the list of Data Server devices from the MDS.
6965 */
6966static int _nfs4_getdevicelist(struct nfs_server *server,
6967 const struct nfs_fh *fh,
6968 struct pnfs_devicelist *devlist)
6969{
6970 struct nfs4_getdevicelist_args args = {
6971 .fh = fh,
6972 .layoutclass = server->pnfs_curr_ld->id,
6973 };
6974 struct nfs4_getdevicelist_res res = {
6975 .devlist = devlist,
6976 };
6977 struct rpc_message msg = {
6978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6979 .rpc_argp = &args,
6980 .rpc_resp = &res,
6981 };
6982 int status;
6983
6984 dprintk("--> %s\n", __func__);
6985 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6986 &res.seq_res, 0);
6987 dprintk("<-- %s status=%d\n", __func__, status);
6988 return status;
6989}
6990
6991int nfs4_proc_getdevicelist(struct nfs_server *server,
6992 const struct nfs_fh *fh,
6993 struct pnfs_devicelist *devlist)
6994{
6995 struct nfs4_exception exception = { };
6996 int err;
6997
6998 do {
6999 err = nfs4_handle_exception(server,
7000 _nfs4_getdevicelist(server, fh, devlist),
7001 &exception);
7002 } while (exception.retry);
7003
7004 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7005 err, devlist->num_devs);
7006
7007 return err;
7008}
7009EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7010
b1f69b75 7011static int
cd5875fe
TM		 7012_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7013 struct pnfs_device *pdev,
7014 struct rpc_cred *cred)
b1f69b75
AA		 7015{
7016 struct nfs4_getdeviceinfo_args args = {
7017 .pdev = pdev,
7018 };
7019 struct nfs4_getdeviceinfo_res res = {
7020 .pdev = pdev,
7021 };
7022 struct rpc_message msg = {
7023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7024 .rpc_argp = &args,
7025 .rpc_resp = &res,
cd5875fe 7026 .rpc_cred = cred,
b1f69b75
AA		 7027 };
7028 int status;
7029
7030 dprintk("--> %s\n", __func__);
7c513058 7031 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7032 dprintk("<-- %s status=%d\n", __func__, status);
7033
7034 return status;
7035}
7036
cd5875fe
TM		 7037int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7038 struct pnfs_device *pdev,
7039 struct rpc_cred *cred)
b1f69b75
AA		 7040{
7041 struct nfs4_exception exception = { };
7042 int err;
7043
7044 do {
7045 err = nfs4_handle_exception(server,
cd5875fe 7046 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7047 &exception);
7048 } while (exception.retry);
7049 return err;
7050}
7051EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7052
863a3c6c
AA		 7053static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7054{
7055 struct nfs4_layoutcommit_data *data = calldata;
7056 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7057 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7058
d9afbd1b
TM		 7059 nfs41_setup_sequence(session,
7060 &data->args.seq_args,
7061 &data->res.seq_res,
7062 task);
863a3c6c
AA		 7063}
7064
7065static void
7066nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7067{
7068 struct nfs4_layoutcommit_data *data = calldata;
7069 struct nfs_server *server = NFS_SERVER(data->args.inode);
7070
6ba7db34 7071 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7072 return;
7073
7074 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7075 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7076 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7077 case -NFS4ERR_BADLAYOUT: /* no layout */
7078 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7079 task->tk_status = 0;
e59d27e0
TM		 7080 break;
7081 case 0:
863a3c6c
AA		 7082 nfs_post_op_update_inode_force_wcc(data->args.inode,
7083 data->res.fattr);
e59d27e0
TM		 7084 break;
7085 default:
7086 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7087 rpc_restart_call_prepare(task);
7088 return;
7089 }
7090 }
863a3c6c
AA		 7091}
7092
7093static void nfs4_layoutcommit_release(void *calldata)
7094{
7095 struct nfs4_layoutcommit_data *data = calldata;
7096
db29c089 7097 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7098 put_rpccred(data->cred);
7099 kfree(data);
7100}
7101
7102static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7103 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7104 .rpc_call_done = nfs4_layoutcommit_done,
7105 .rpc_release = nfs4_layoutcommit_release,
7106};
7107
7108int
ef311537 7109nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7110{
7111 struct rpc_message msg = {
7112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7113 .rpc_argp = &data->args,
7114 .rpc_resp = &data->res,
7115 .rpc_cred = data->cred,
7116 };
7117 struct rpc_task_setup task_setup_data = {
7118 .task = &data->task,
7119 .rpc_client = NFS_CLIENT(data->args.inode),
7120 .rpc_message = &msg,
7121 .callback_ops = &nfs4_layoutcommit_ops,
7122 .callback_data = data,
7123 .flags = RPC_TASK_ASYNC,
7124 };
7125 struct rpc_task *task;
7126 int status = 0;
7127
7128 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7129 "lbw: %llu inode %lu\n",
7130 data->task.tk_pid, sync,
7131 data->args.lastbytewritten,
7132 data->args.inode->i_ino);
7133
9d12b216 7134 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7135 task = rpc_run_task(&task_setup_data);
7136 if (IS_ERR(task))
7137 return PTR_ERR(task);
ef311537 7138 if (sync == false)
863a3c6c
AA		 7139 goto out;
7140 status = nfs4_wait_for_completion_rpc_task(task);
7141 if (status != 0)
7142 goto out;
7143 status = task->tk_status;
1037e6ea 7144 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7145out:
7146 dprintk("%s: status %d\n", __func__, status);
7147 rpc_put_task(task);
7148 return status;
7149}
fca78d6d 7150
97431204
AA		 7151/**
7152 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7153 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7154 */
fca78d6d
BS		 7155static int
7156_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7157 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7158{
7159 struct nfs41_secinfo_no_name_args args = {
7160 .style = SECINFO_STYLE_CURRENT_FH,
7161 };
7162 struct nfs4_secinfo_res res = {
7163 .flavors = flavors,
7164 };
7165 struct rpc_message msg = {
7166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7167 .rpc_argp = &args,
7168 .rpc_resp = &res,
7169 };
97431204
AA		 7170 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7171 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7172}
7173
7174static int
7175nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7176 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7177{
7178 struct nfs4_exception exception = { };
7179 int err;
7180 do {
7181 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7182 switch (err) {
7183 case 0:
7184 case -NFS4ERR_WRONGSEC:
7185 case -NFS4ERR_NOTSUPP:
05e9cfb4 7186 goto out;
fca78d6d
BS		 7187 default:
7188 err = nfs4_handle_exception(server, err, &exception);
7189 }
7190 } while (exception.retry);
05e9cfb4 7191out:
fca78d6d
BS		 7192 return err;
7193}
7194
7195static int
7196nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7197 struct nfs_fsinfo *info)
7198{
7199 int err;
7200 struct page *page;
7201 rpc_authflavor_t flavor;
7202 struct nfs4_secinfo_flavors *flavors;
7203
7204 page = alloc_page(GFP_KERNEL);
7205 if (!page) {
7206 err = -ENOMEM;
7207 goto out;
7208 }
7209
7210 flavors = page_address(page);
7211 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7212
7213 /*
7214 * Fall back on "guess and check" method if
7215 * the server doesn't support SECINFO_NO_NAME
7216 */
7217 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7218 err = nfs4_find_root_sec(server, fhandle, info);
7219 goto out_freepage;
7220 }
7221 if (err)
7222 goto out_freepage;
7223
7224 flavor = nfs_find_best_sec(flavors);
7225 if (err == 0)
7226 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7227
7228out_freepage:
7229 put_page(page);
7230 if (err == -EACCES)
7231 return -EPERM;
7232out:
7233 return err;
7234}
1cab0652 7235
ab7cb0df
TM		 7236static int _nfs41_test_stateid(struct nfs_server *server,
7237 nfs4_stateid *stateid,
7238 struct rpc_cred *cred)
7d974794
BS		 7239{
7240 int status;
7241 struct nfs41_test_stateid_args args = {
1cab0652 7242 .stateid = stateid,
7d974794
BS		 7243 };
7244 struct nfs41_test_stateid_res res;
7245 struct rpc_message msg = {
7246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7247 .rpc_argp = &args,
7248 .rpc_resp = &res,
ab7cb0df 7249 .rpc_cred = cred,
7d974794 7250 };
1cab0652 7251
38527b15 7252 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7253 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7254 nfs4_set_sequence_privileged(&args.seq_args);
7255 status = nfs4_call_sync_sequence(server->client, server, &msg,
7256 &args.seq_args, &res.seq_res);
38527b15
CL		 7257 if (status != NFS_OK) {
7258 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7259 return status;
38527b15
CL		 7260 }
7261 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7262 return -res.status;
7d974794
BS		 7263}
7264
38527b15
CL		 7265/**
7266 * nfs41_test_stateid - perform a TEST_STATEID operation
7267 *
7268 * @server: server / transport on which to perform the operation
7269 * @stateid: state ID to test
ab7cb0df 7270 * @cred: credential
38527b15
CL		 7271 *
7272 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7273 * Otherwise a negative NFS4ERR value is returned if the operation
7274 * failed or the state ID is not currently valid.
7275 */
ab7cb0df
TM		 7276static int nfs41_test_stateid(struct nfs_server *server,
7277 nfs4_stateid *stateid,
7278 struct rpc_cred *cred)
7d974794
BS		 7279{
7280 struct nfs4_exception exception = { };
7281 int err;
7282 do {
ab7cb0df 7283 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7284 if (err != -NFS4ERR_DELAY)
7285 break;
7286 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7287 } while (exception.retry);
7288 return err;
7289}
9aeda35f 7290
7c1d5fae
TM		 7291struct nfs_free_stateid_data {
7292 struct nfs_server *server;
7293 struct nfs41_free_stateid_args args;
9aeda35f 7294 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7295};
7296
7297static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7298{
7299 struct nfs_free_stateid_data *data = calldata;
7300 nfs41_setup_sequence(nfs4_get_session(data->server),
7301 &data->args.seq_args,
7302 &data->res.seq_res,
7303 task);
7304}
7305
7306static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7307{
7308 struct nfs_free_stateid_data *data = calldata;
7309
7310 nfs41_sequence_done(task, &data->res.seq_res);
7311
7312 switch (task->tk_status) {
7313 case -NFS4ERR_DELAY:
7314 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7315 rpc_restart_call_prepare(task);
7316 }
7317}
7318
7319static void nfs41_free_stateid_release(void *calldata)
7320{
7321 kfree(calldata);
7322}
7323
17f26b12 7324static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7325 .rpc_call_prepare = nfs41_free_stateid_prepare,
7326 .rpc_call_done = nfs41_free_stateid_done,
7327 .rpc_release = nfs41_free_stateid_release,
7328};
7329
7330static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7331 nfs4_stateid *stateid,
ab7cb0df 7332 struct rpc_cred *cred,
7c1d5fae
TM		 7333 bool privileged)
7334{
9aeda35f
BS		 7335 struct rpc_message msg = {
7336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7337 .rpc_cred = cred,
9aeda35f 7338 };
7c1d5fae
TM		 7339 struct rpc_task_setup task_setup = {
7340 .rpc_client = server->client,
7341 .rpc_message = &msg,
7342 .callback_ops = &nfs41_free_stateid_ops,
7343 .flags = RPC_TASK_ASYNC,
7344 };
7345 struct nfs_free_stateid_data *data;
9aeda35f 7346
38527b15 7347 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7348 data = kmalloc(sizeof(*data), GFP_NOFS);
7349 if (!data)
7350 return ERR_PTR(-ENOMEM);
7351 data->server = server;
7352 nfs4_stateid_copy(&data->args.stateid, stateid);
7353
7354 task_setup.callback_data = data;
7355
7356 msg.rpc_argp = &data->args;
7357 msg.rpc_resp = &data->res;
7358 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7359 if (privileged)
7360 nfs4_set_sequence_privileged(&data->args.seq_args);
7361
7362 return rpc_run_task(&task_setup);
9aeda35f
BS		 7363}
7364
38527b15
CL		 7365/**
7366 * nfs41_free_stateid - perform a FREE_STATEID operation
7367 *
7368 * @server: server / transport on which to perform the operation
7369 * @stateid: state ID to release
ab7cb0df 7370 * @cred: credential
38527b15
CL		 7371 *
7372 * Returns NFS_OK if the server freed "stateid". Otherwise a
7373 * negative NFS4ERR value is returned.
7374 */
ab7cb0df
TM		 7375static int nfs41_free_stateid(struct nfs_server *server,
7376 nfs4_stateid *stateid,
7377 struct rpc_cred *cred)
9aeda35f 7378{
7c1d5fae
TM		 7379 struct rpc_task *task;
7380 int ret;
7381
ab7cb0df 7382 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7383 if (IS_ERR(task))
7384 return PTR_ERR(task);
7385 ret = rpc_wait_for_completion_task(task);
7386 if (!ret)
7387 ret = task->tk_status;
7388 rpc_put_task(task);
7389 return ret;
9aeda35f 7390}
36281caa 7391
c8b2d0bf
TM		 7392static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7393{
7394 struct rpc_task *task;
ab7cb0df 7395 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7396
ab7cb0df 7397 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7398 nfs4_free_lock_state(server, lsp);
7399 if (IS_ERR(task))
7400 return PTR_ERR(task);
7401 rpc_put_task(task);
7402 return 0;
7403}
7404
36281caa
TM		 7405static bool nfs41_match_stateid(const nfs4_stateid *s1,
7406 const nfs4_stateid *s2)
7407{
2d2f24ad 7408 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7409 return false;
7410
2d2f24ad 7411 if (s1->seqid == s2->seqid)
36281caa 7412 return true;
2d2f24ad 7413 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7414 return true;
7415
7416 return false;
7417}
7418
557134a3
AA		 7419#endif /* CONFIG_NFS_V4_1 */
7420
36281caa
TM		 7421static bool nfs4_match_stateid(const nfs4_stateid *s1,
7422 const nfs4_stateid *s2)
7423{
f597c537 7424 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7425}
7426
7427
17280175 7428static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7429 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7430 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7431 .recover_open = nfs4_open_reclaim,
7432 .recover_lock = nfs4_lock_reclaim,
591d71cb 7433 .establish_clid = nfs4_init_clientid,
05f4c350 7434 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7435};
7436
591d71cb 7437#if defined(CONFIG_NFS_V4_1)
17280175 7438static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7439 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7440 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7441 .recover_open = nfs4_open_reclaim,
7442 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7443 .establish_clid = nfs41_init_clientid,
fce5c838 7444 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7445 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7446};
7447#endif /* CONFIG_NFS_V4_1 */
7448
17280175 7449static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7450 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7451 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7452 .recover_open = nfs4_open_expired,
7453 .recover_lock = nfs4_lock_expired,
7454 .establish_clid = nfs4_init_clientid,
7455};
7456
7457#if defined(CONFIG_NFS_V4_1)
17280175 7458static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7459 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7460 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7461 .recover_open = nfs41_open_expired,
7462 .recover_lock = nfs41_lock_expired,
4d643d1d 7463 .establish_clid = nfs41_init_clientid,
1da177e4 7464};
591d71cb 7465#endif /* CONFIG_NFS_V4_1 */
1da177e4 7466
17280175 7467static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7468 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7469 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7470 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7471};
7472
7473#if defined(CONFIG_NFS_V4_1)
17280175 7474static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7475 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7476 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7477 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7478};
7479#endif
7480
97dc1359
TM		 7481static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7482 .minor_version = 0,
39c6daae
TM		 7483 .init_caps = NFS_CAP_READDIRPLUS
7484 | NFS_CAP_ATOMIC_OPEN
7485 | NFS_CAP_CHANGE_ATTR
7486 | NFS_CAP_POSIX_LOCK,
97dc1359 7487 .call_sync = _nfs4_call_sync,
36281caa 7488 .match_stateid = nfs4_match_stateid,
fca78d6d 7489 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7490 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7491 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7492 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7493 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7494};
7495
7496#if defined(CONFIG_NFS_V4_1)
7497static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7498 .minor_version = 1,
39c6daae
TM		 7499 .init_caps = NFS_CAP_READDIRPLUS
7500 | NFS_CAP_ATOMIC_OPEN
7501 | NFS_CAP_CHANGE_ATTR
3b66486c 7502 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7503 | NFS_CAP_STATEID_NFSV41
7504 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7505 .call_sync = nfs4_call_sync_sequence,
36281caa 7506 .match_stateid = nfs41_match_stateid,
fca78d6d 7507 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7508 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7509 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7510 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7511 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7512};
7513#endif
7514
42c2c424
SD		 7515#if defined(CONFIG_NFS_V4_2)
7516static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7517 .minor_version = 2,
7017310a
BS		 7518 .init_caps = NFS_CAP_READDIRPLUS
7519 | NFS_CAP_ATOMIC_OPEN
7520 | NFS_CAP_CHANGE_ATTR
7521 | NFS_CAP_POSIX_LOCK
7522 | NFS_CAP_STATEID_NFSV41
7523 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7524 .call_sync = nfs4_call_sync_sequence,
7525 .match_stateid = nfs41_match_stateid,
7526 .find_root_sec = nfs41_find_root_sec,
7017310a 7527 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7528 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7529 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7530 .state_renewal_ops = &nfs41_state_renewal_ops,
7531};
7532#endif
7533
97dc1359
TM		 7534const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7535 [0] = &nfs_v4_0_minor_ops,
7536#if defined(CONFIG_NFS_V4_1)
7537 [1] = &nfs_v4_1_minor_ops,
7538#endif
42c2c424
SD		 7539#if defined(CONFIG_NFS_V4_2)
7540 [2] = &nfs_v4_2_minor_ops,
7541#endif
97dc1359
TM		 7542};
7543
17f26b12 7544static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7545 .create = nfs_create,
7546 .lookup = nfs_lookup,
7547 .atomic_open = nfs_atomic_open,
7548 .link = nfs_link,
7549 .unlink = nfs_unlink,
7550 .symlink = nfs_symlink,
7551 .mkdir = nfs_mkdir,
7552 .rmdir = nfs_rmdir,
7553 .mknod = nfs_mknod,
7554 .rename = nfs_rename,
7555 .permission = nfs_permission,
7556 .getattr = nfs_getattr,
7557 .setattr = nfs_setattr,
7558 .getxattr = generic_getxattr,
7559 .setxattr = generic_setxattr,
7560 .listxattr = generic_listxattr,
7561 .removexattr = generic_removexattr,
7562};
7563
92e1d5be 7564static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7565 .permission = nfs_permission,
7566 .getattr = nfs_getattr,
7567 .setattr = nfs_setattr,
64c2ce8b
AK		 7568 .getxattr = generic_getxattr,
7569 .setxattr = generic_setxattr,
7570 .listxattr = generic_listxattr,
7571 .removexattr = generic_removexattr,
6b3b5496
BF		 7572};
7573
509de811 7574const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7575 .version = 4, /* protocol version */
7576 .dentry_ops = &nfs4_dentry_operations,
7577 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7578 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7579 .file_ops = &nfs4_file_operations,
1da177e4 7580 .getroot = nfs4_proc_get_root,
281cad46 7581 .submount = nfs4_submount,
ff9099f2 7582 .try_mount = nfs4_try_mount,
1da177e4
LT		 7583 .getattr = nfs4_proc_getattr,
7584 .setattr = nfs4_proc_setattr,
7585 .lookup = nfs4_proc_lookup,
7586 .access = nfs4_proc_access,
7587 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7588 .create = nfs4_proc_create,
7589 .remove = nfs4_proc_remove,
7590 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7591 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7592 .unlink_done = nfs4_proc_unlink_done,
7593 .rename = nfs4_proc_rename,
d3d4152a 7594 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7595 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7596 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7597 .link = nfs4_proc_link,
7598 .symlink = nfs4_proc_symlink,
7599 .mkdir = nfs4_proc_mkdir,
7600 .rmdir = nfs4_proc_remove,
7601 .readdir = nfs4_proc_readdir,
7602 .mknod = nfs4_proc_mknod,
7603 .statfs = nfs4_proc_statfs,
7604 .fsinfo = nfs4_proc_fsinfo,
7605 .pathconf = nfs4_proc_pathconf,
e9326dca 7606 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7607 .decode_dirent = nfs4_decode_dirent,
7608 .read_setup = nfs4_proc_read_setup,
1abb5088 7609 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7610 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7611 .read_done = nfs4_read_done,
1da177e4 7612 .write_setup = nfs4_proc_write_setup,
57208fa7 7613 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7614 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7615 .write_done = nfs4_write_done,
1da177e4 7616 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7617 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7618 .commit_done = nfs4_commit_done,
1da177e4 7619 .lock = nfs4_proc_lock,
e50a1c2e 7620 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7621 .close_context = nfs4_close_context,
2b484297 7622 .open_context = nfs4_atomic_open,
011e2a7f 7623 .have_delegation = nfs4_have_delegation,
57ec14c5 7624 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7625 .alloc_client = nfs4_alloc_client,
45a52a02 7626 .init_client = nfs4_init_client,
cdb7eced 7627 .free_client = nfs4_free_client,
1179acc6
BS		 7628 .create_server = nfs4_create_server,
7629 .clone_server = nfs_clone_server,
1da177e4
LT		 7630};
7631
64c2ce8b
AK		 7632static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7633 .prefix = XATTR_NAME_NFSV4_ACL,
7634 .list = nfs4_xattr_list_nfs4_acl,
7635 .get = nfs4_xattr_get_nfs4_acl,
7636 .set = nfs4_xattr_set_nfs4_acl,
7637};
7638
7639const struct xattr_handler *nfs4_xattr_handlers[] = {
7640 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7641#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7642 &nfs4_xattr_nfs4_label_handler,
7643#endif
64c2ce8b
AK		 7644 NULL
7645};
7646
1da177e4
LT		 7647/*
7648 * Local variables:
7649 * c-basic-offset: 8
7650 * End:
7651 */
Linux 6.x block layer and io_uring tree(s)