projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Ensure that rmdir() waits for sillyrenames to complete
[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
a5250def
WAA		 438/*
439 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
440 * or 'false' otherwise.
441 */
442static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
443{
444 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
445
446 if (flavor == RPC_AUTH_GSS_KRB5I ||
447 flavor == RPC_AUTH_GSS_KRB5P)
448 return true;
449
450 return false;
451}
65de872e 452
452e9352 453static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 454{
1da177e4
LT		 455 spin_lock(&clp->cl_lock);
456 if (time_before(clp->cl_last_renewal,timestamp))
457 clp->cl_last_renewal = timestamp;
458 spin_unlock(&clp->cl_lock);
459}
460
452e9352
TM		 461static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
462{
463 do_renew_lease(server->nfs_client, timestamp);
464}
465
cccef3b9
AA		 466#if defined(CONFIG_NFS_V4_1)
467
d185a334 468static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 469{
e3725ec0 470 struct nfs4_session *session;
13615871 471 struct nfs4_slot_table *tbl;
c10e4498 472 bool send_new_highest_used_slotid = false;
13615871 473
dfb4f309 474 if (!res->sr_slot) {
13615871
AA		 475 /* just wake up the next guy waiting since
476 * we may have not consumed a slot after all */
691daf3b 477 dprintk("%s: No slot\n", __func__);
35dc1d74 478 return;
13615871 479 }
e3725ec0
TM		 480 tbl = res->sr_slot->table;
481 session = tbl->session;
ea028ac9 482
35dc1d74 483 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 484 /* Be nice to the server: try to ensure that the last transmitted
485 * value for highest_user_slotid <= target_highest_slotid
486 */
487 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
488 send_new_highest_used_slotid = true;
489
b75ad4cd
TM		 490 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
491 send_new_highest_used_slotid = false;
492 goto out_unlock;
493 }
f4af6e2a 494 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 495
496 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
497 send_new_highest_used_slotid = false;
b75ad4cd 498out_unlock:
35dc1d74 499 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 500 res->sr_slot = NULL;
c10e4498
TM		 501 if (send_new_highest_used_slotid)
502 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 503}
504
14516c3a 505static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 506{
e3725ec0 507 struct nfs4_session *session;
933602e3 508 struct nfs4_slot *slot;
14516c3a 509 struct nfs_client *clp;
ac20d163 510 bool interrupted = false;
85563073 511 int ret = 1;
b0df806c 512
468f8613
BS		 513 /* don't increment the sequence number if the task wasn't sent */
514 if (!RPC_WAS_SENT(task))
b0df806c
AA		 515 goto out;
516
933602e3 517 slot = res->sr_slot;
e3725ec0 518 session = slot->table->session;
933602e3 519
ac20d163
TM		 520 if (slot->interrupted) {
521 slot->interrupted = 0;
522 interrupted = true;
523 }
524
2f92ae34 525 trace_nfs4_sequence_done(session, res);
691daf3b 526 /* Check the SEQUENCE operation status */
14516c3a
TM		 527 switch (res->sr_status) {
528 case 0:
b0df806c 529 /* Update the slot's sequence and clientid lease timer */
933602e3 530 ++slot->seq_nr;
e3725ec0 531 clp = session->clp;
8e63b6a8 532 do_renew_lease(clp, res->sr_timestamp);
0629e370 533 /* Check sequence flags */
b4410c2f
TM		 534 if (res->sr_status_flags != 0)
535 nfs4_schedule_lease_recovery(clp);
464ee9f9 536 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 537 break;
ac20d163
TM		 538 case 1:
539 /*
540 * sr_status remains 1 if an RPC level error occurred.
541 * The server may or may not have processed the sequence
542 * operation..
543 * Mark the slot as having hosted an interrupted RPC call.
544 */
545 slot->interrupted = 1;
546 goto out;
14516c3a
TM		 547 case -NFS4ERR_DELAY:
548 /* The server detected a resend of the RPC call and
549 * returned NFS4ERR_DELAY as per Section 2.10.6.2
550 * of RFC5661.
551 */
df2fabff 552 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 553 __func__,
df2fabff 554 slot->slot_nr,
933602e3 555 slot->seq_nr);
14516c3a 556 goto out_retry;
85563073
TM		 557 case -NFS4ERR_BADSLOT:
558 /*
559 * The slot id we used was probably retired. Try again
560 * using a different slot id.
561 */
e8794440
TM		 562 goto retry_nowait;
563 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 564 /*
565 * Was the last operation on this sequence interrupted?
566 * If so, retry after bumping the sequence number.
567 */
568 if (interrupted) {
569 ++slot->seq_nr;
570 goto retry_nowait;
571 }
e8794440
TM		 572 /*
573 * Could this slot have been previously retired?
574 * If so, then the server may be expecting seq_nr = 1!
575 */
8e63b6a8
TM		 576 if (slot->seq_nr != 1) {
577 slot->seq_nr = 1;
578 goto retry_nowait;
579 }
580 break;
e8794440
TM		 581 case -NFS4ERR_SEQ_FALSE_RETRY:
582 ++slot->seq_nr;
583 goto retry_nowait;
14516c3a
TM		 584 default:
585 /* Just update the slot sequence no. */
933602e3 586 ++slot->seq_nr;
b0df806c
AA		 587 }
588out:
589 /* The session may be reset by one of the error handlers. */
590 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 591 nfs41_sequence_free_slot(res);
85563073 592 return ret;
e8794440
TM		 593retry_nowait:
594 if (rpc_restart_call_prepare(task)) {
595 task->tk_status = 0;
596 ret = 0;
597 }
598 goto out;
14516c3a 599out_retry:
d05dd4e9 600 if (!rpc_restart_call(task))
14516c3a
TM		 601 goto out;
602 rpc_delay(task, NFS4_POLL_RETRY_MAX);
603 return 0;
b0df806c
AA		 604}
605
14516c3a
TM		 606static int nfs4_sequence_done(struct rpc_task *task,
607 struct nfs4_sequence_res *res)
df896455 608{
e3725ec0 609 if (res->sr_slot == NULL)
14516c3a
TM		 610 return 1;
611 return nfs41_sequence_done(task, res);
df896455
TM		 612}
613
9d12b216
TM		 614static void nfs41_init_sequence(struct nfs4_sequence_args *args,
615 struct nfs4_sequence_res *res, int cache_reply)
616{
2b2fa717 617 args->sa_slot = NULL;
9d12b216 618 args->sa_cache_this = 0;
8fe72bac 619 args->sa_privileged = 0;
9d12b216
TM		 620 if (cache_reply)
621 args->sa_cache_this = 1;
9d12b216
TM		 622 res->sr_slot = NULL;
623}
624
8fe72bac
TM		 625static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
626{
627 args->sa_privileged = 1;
628}
629
dc70d7b3 630int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 631 struct nfs4_sequence_args *args,
632 struct nfs4_sequence_res *res,
ce5039c1
AA		 633 struct rpc_task *task)
634{
fbcd4abc
AA		 635 struct nfs4_slot *slot;
636 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 637
638 dprintk("--> %s\n", __func__);
ce5039c1 639 /* slot already allocated? */
dfb4f309 640 if (res->sr_slot != NULL)
d9afbd1b 641 goto out_success;
ce5039c1 642
fbcd4abc
AA		 643 tbl = &session->fc_slot_table;
644
69d206b5
TM		 645 task->tk_timeout = 0;
646
fbcd4abc 647 spin_lock(&tbl->slot_tbl_lock);
774d5f14 648 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 649 !args->sa_privileged) {
0b1c8fc4 650 /* The state manager will wait until the slot table is empty */
0b1c8fc4 651 dprintk("%s session is draining\n", __func__);
7b939a3f 652 goto out_sleep;
689cf5c1
AB		 653 }
654
2dc03b7f 655 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 656 if (IS_ERR(slot)) {
657 /* If out of memory, try again in 1/4 second */
658 if (slot == ERR_PTR(-ENOMEM))
659 task->tk_timeout = HZ >> 2;
fbcd4abc 660 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 661 goto out_sleep;
fbcd4abc
AA		 662 }
663 spin_unlock(&tbl->slot_tbl_lock);
664
2b2fa717 665 args->sa_slot = slot;
fbcd4abc 666
2dc03b7f
TM		 667 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
668 slot->slot_nr, slot->seq_nr);
fbcd4abc 669
dfb4f309 670 res->sr_slot = slot;
8e63b6a8 671 res->sr_timestamp = jiffies;
2a6e26cd 672 res->sr_status_flags = 0;
fbcd4abc
AA		 673 /*
674 * sr_status is only set in decode_sequence, and so will remain
675 * set to 1 if an rpc level failure occurs.
676 */
677 res->sr_status = 1;
2f92ae34 678 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 679out_success:
680 rpc_call_start(task);
ce5039c1 681 return 0;
7b939a3f 682out_sleep:
8fe72bac
TM		 683 /* Privileged tasks are queued with top priority */
684 if (args->sa_privileged)
1e1093c7
TM		 685 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
686 NULL, RPC_PRIORITY_PRIVILEGED);
687 else
688 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 689 spin_unlock(&tbl->slot_tbl_lock);
690 return -EAGAIN;
ce5039c1 691}
dc70d7b3 692EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 693
035168ab 694int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 695 struct nfs4_sequence_args *args,
696 struct nfs4_sequence_res *res,
ce5039c1
AA		 697 struct rpc_task *task)
698{
035168ab 699 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 700 int ret = 0;
701
d9afbd1b
TM		 702 if (session == NULL) {
703 rpc_call_start(task);
035168ab 704 goto out;
d9afbd1b 705 }
035168ab 706
df2fabff 707 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 708 __func__, session->clp, session, res->sr_slot ?
df2fabff 709 res->sr_slot->slot_nr : -1);
ce5039c1 710
9d12b216 711 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 712out:
713 dprintk("<-- %s status=%d\n", __func__, ret);
714 return ret;
715}
716
717struct nfs41_call_sync_data {
035168ab 718 const struct nfs_server *seq_server;
ce5039c1
AA		 719 struct nfs4_sequence_args *seq_args;
720 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 721};
722
723static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
724{
725 struct nfs41_call_sync_data *data = calldata;
6ba7db34 726 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 727
035168ab
TM		 728 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
729
d9afbd1b 730 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 731}
732
69ab40c4
AA		 733static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
734{
735 struct nfs41_call_sync_data *data = calldata;
736
14516c3a 737 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 738}
739
17280175 740static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 741 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 742 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 743};
744
7c513058
BS		 745static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
746 struct nfs_server *server,
ce5039c1
AA		 747 struct rpc_message *msg,
748 struct nfs4_sequence_args *args,
8fe72bac 749 struct nfs4_sequence_res *res)
ce5039c1
AA		 750{
751 int ret;
752 struct rpc_task *task;
753 struct nfs41_call_sync_data data = {
035168ab 754 .seq_server = server,
ce5039c1
AA		 755 .seq_args = args,
756 .seq_res = res,
ce5039c1
AA		 757 };
758 struct rpc_task_setup task_setup = {
7c513058 759 .rpc_client = clnt,
ce5039c1
AA		 760 .rpc_message = msg,
761 .callback_ops = &nfs41_call_sync_ops,
762 .callback_data = &data
763 };
764
ce5039c1
AA		 765 task = rpc_run_task(&task_setup);
766 if (IS_ERR(task))
767 ret = PTR_ERR(task);
768 else {
769 ret = task->tk_status;
770 rpc_put_task(task);
771 }
772 return ret;
773}
774
df896455 775#else
8fe72bac 776static
9d12b216
TM		 777void nfs41_init_sequence(struct nfs4_sequence_args *args,
778 struct nfs4_sequence_res *res, int cache_reply)
779{
780}
781
8fe72bac
TM		 782static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
783{
784}
785
786
14516c3a
TM		 787static int nfs4_sequence_done(struct rpc_task *task,
788 struct nfs4_sequence_res *res)
df896455 789{
14516c3a 790 return 1;
df896455 791}
cccef3b9
AA		 792#endif /* CONFIG_NFS_V4_1 */
793
fd0c0953 794static
7c513058
BS		 795int _nfs4_call_sync(struct rpc_clnt *clnt,
796 struct nfs_server *server,
cccef3b9
AA		 797 struct rpc_message *msg,
798 struct nfs4_sequence_args *args,
fd0c0953 799 struct nfs4_sequence_res *res)
cccef3b9 800{
7c513058 801 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 802}
803
fd0c0953 804static
7c513058
BS		 805int nfs4_call_sync(struct rpc_clnt *clnt,
806 struct nfs_server *server,
e73b83f2
BS		 807 struct rpc_message *msg,
808 struct nfs4_sequence_args *args,
809 struct nfs4_sequence_res *res,
810 int cache_reply)
811{
fd0c0953 812 nfs41_init_sequence(args, res, cache_reply);
7c513058 813 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 814 args, res);
e73b83f2 815}
cccef3b9 816
38478b24 817static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 818{
38478b24 819 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 820
38478b24 821 spin_lock(&dir->i_lock);
359d7d1c 822 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 823 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 824 nfs_force_lookup_revalidate(dir);
a9a4a87a 825 dir->i_version = cinfo->after;
de242c0b 826 nfs_fscache_invalidate(dir);
38478b24 827 spin_unlock(&dir->i_lock);
1da177e4
LT		 828}
829
e56e0b78 830struct nfs4_opendata {
c6d00e63 831 struct kref kref;
e56e0b78
TM		 832 struct nfs_openargs o_arg;
833 struct nfs_openres o_res;
cdd4e68b
TM		 834 struct nfs_open_confirmargs c_arg;
835 struct nfs_open_confirmres c_res;
6926afd1
TM		 836 struct nfs4_string owner_name;
837 struct nfs4_string group_name;
e56e0b78 838 struct nfs_fattr f_attr;
1775fd3e 839 struct nfs4_label *f_label;
e56e0b78 840 struct dentry *dir;
82a2c1b7 841 struct dentry *dentry;
e56e0b78 842 struct nfs4_state_owner *owner;
aac00a8d 843 struct nfs4_state *state;
e56e0b78 844 struct iattr attrs;
26e976a8 845 unsigned long timestamp;
3e309914 846 unsigned int rpc_done : 1;
bdeca1b7 847 unsigned int is_recover : 1;
24ac23ab
TM		 848 int rpc_status;
849 int cancelled;
e56e0b78
TM		 850};
851
49f9a0fa
TM		 852static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
853 int err, struct nfs4_exception *exception)
854{
855 if (err != -EINVAL)
856 return false;
857 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
858 return false;
859 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
860 exception->retry = 1;
861 return true;
862}
863
864static enum open_claim_type4
865nfs4_map_atomic_open_claim(struct nfs_server *server,
866 enum open_claim_type4 claim)
867{
868 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
869 return claim;
870 switch (claim) {
871 default:
872 return claim;
873 case NFS4_OPEN_CLAIM_FH:
874 return NFS4_OPEN_CLAIM_NULL;
875 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
876 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
877 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
878 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
879 }
880}
2ced46c2
TM		 881
882static void nfs4_init_opendata_res(struct nfs4_opendata *p)
883{
884 p->o_res.f_attr = &p->f_attr;
1775fd3e 885 p->o_res.f_label = p->f_label;
c1d51931
TM		 886 p->o_res.seqid = p->o_arg.seqid;
887 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 888 p->o_res.server = p->o_arg.server;
5f657530 889 p->o_res.access_request = p->o_arg.access;
2ced46c2 890 nfs_fattr_init(&p->f_attr);
6926afd1 891 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 892}
893
82a2c1b7 894static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 895 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 896 const struct iattr *attrs,
1775fd3e 897 struct nfs4_label *label,
4a1c0893 898 enum open_claim_type4 claim,
8535b2be 899 gfp_t gfp_mask)
e56e0b78 900{
82a2c1b7 901 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 902 struct inode *dir = parent->d_inode;
903 struct nfs_server *server = NFS_SERVER(dir);
904 struct nfs4_opendata *p;
905
8535b2be 906 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 907 if (p == NULL)
908 goto err;
14c43f76
DQ		 909
910 p->f_label = nfs4_label_alloc(server, gfp_mask);
911 if (IS_ERR(p->f_label))
912 goto err_free_p;
913
8535b2be 914 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 915 if (p->o_arg.seqid == NULL)
14c43f76 916 goto err_free_label;
82a2c1b7
AV		 917 nfs_sb_active(dentry->d_sb);
918 p->dentry = dget(dentry);
e56e0b78
TM		 919 p->dir = parent;
920 p->owner = sp;
921 atomic_inc(&sp->so_count);
dc0b027d
TM		 922 p->o_arg.open_flags = flags;
923 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 924 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
925 * will return permission denied for all bits until close */
926 if (!(flags & O_EXCL)) {
927 /* ask server to check for all possible rights as results
928 * are cached */
929 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
930 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 931 }
7539bbab 932 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 933 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
934 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 935 p->o_arg.name = &dentry->d_name;
e56e0b78 936 p->o_arg.server = server;
aa9c2669 937 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 938 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 939 p->o_arg.label = label;
49f9a0fa
TM		 940 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
941 switch (p->o_arg.claim) {
4a1c0893
TM		 942 case NFS4_OPEN_CLAIM_NULL:
943 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
944 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
945 p->o_arg.fh = NFS_FH(dir);
946 break;
947 case NFS4_OPEN_CLAIM_PREVIOUS:
948 case NFS4_OPEN_CLAIM_FH:
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
951 p->o_arg.fh = NFS_FH(dentry->d_inode);
952 }
536e43d1 953 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 954 __u32 verf[2];
d77d76ff 955
e56e0b78
TM		 956 p->o_arg.u.attrs = &p->attrs;
957 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 958
959 verf[0] = jiffies;
960 verf[1] = current->pid;
961 memcpy(p->o_arg.u.verifier.data, verf,
962 sizeof(p->o_arg.u.verifier.data));
e56e0b78 963 }
cdd4e68b
TM		 964 p->c_arg.fh = &p->o_res.fh;
965 p->c_arg.stateid = &p->o_res.stateid;
966 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 967 nfs4_init_opendata_res(p);
c6d00e63 968 kref_init(&p->kref);
e56e0b78 969 return p;
14c43f76
DQ		 970
971err_free_label:
972 nfs4_label_free(p->f_label);
973err_free_p:
e56e0b78
TM		 974 kfree(p);
975err:
976 dput(parent);
977 return NULL;
978}
979
c6d00e63 980static void nfs4_opendata_free(struct kref *kref)
e56e0b78 981{
c6d00e63
TM		 982 struct nfs4_opendata *p = container_of(kref,
983 struct nfs4_opendata, kref);
82a2c1b7 984 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 985
986 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 987 if (p->state != NULL)
988 nfs4_put_open_state(p->state);
c6d00e63 989 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 990
991 nfs4_label_free(p->f_label);
992
c6d00e63 993 dput(p->dir);
82a2c1b7
AV		 994 dput(p->dentry);
995 nfs_sb_deactive(sb);
6926afd1 996 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 997 kfree(p);
998}
999
1000static void nfs4_opendata_put(struct nfs4_opendata *p)
1001{
1002 if (p != NULL)
1003 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1004}
1005
06f814a3
TM		 1006static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1007{
06f814a3
TM		 1008 int ret;
1009
06f814a3 1010 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1011 return ret;
1012}
1013
dc0b027d 1014static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1015{
1016 int ret = 0;
dc0b027d 1017
536e43d1 1018 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1019 goto out;
1020 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1021 case FMODE_READ:
88069f77
TM		 1022 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1023 && state->n_rdonly != 0;
6ee41268
TM		 1024 break;
1025 case FMODE_WRITE:
88069f77
TM		 1026 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1027 && state->n_wronly != 0;
6ee41268
TM		 1028 break;
1029 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1030 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1031 && state->n_rdwr != 0;
6ee41268 1032 }
dc0b027d 1033out:
6ee41268
TM		 1034 return ret;
1035}
1036
dc0b027d 1037static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1038{
652f89f6
TM		 1039 if (delegation == NULL)
1040 return 0;
dc0b027d 1041 if ((delegation->type & fmode) != fmode)
aac00a8d 1042 return 0;
15c831bf 1043 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1044 return 0;
d25be546
TM		 1045 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1046 return 0;
b7391f44 1047 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1048 return 1;
1049}
1050
dc0b027d 1051static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1052{
dc0b027d 1053 switch (fmode) {
e7616923
TM		 1054 case FMODE_WRITE:
1055 state->n_wronly++;
1056 break;
1057 case FMODE_READ:
1058 state->n_rdonly++;
1059 break;
1060 case FMODE_READ|FMODE_WRITE:
1061 state->n_rdwr++;
1062 }
dc0b027d 1063 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1064}
1065
dc0b027d 1066static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1067{
1068 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1069 nfs4_stateid_copy(&state->stateid, stateid);
1070 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1071 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1072 switch (fmode) {
003707c7
TM		 1073 case FMODE_READ:
1074 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1075 break;
1076 case FMODE_WRITE:
1077 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1078 break;
1079 case FMODE_READ|FMODE_WRITE:
1080 set_bit(NFS_O_RDWR_STATE, &state->flags);
1081 }
e7616923
TM		 1082}
1083
dc0b027d 1084static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1085{
8bda4e4c 1086 write_seqlock(&state->seqlock);
dc0b027d 1087 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1088 write_sequnlock(&state->seqlock);
003707c7
TM		 1089}
1090
dc0b027d 1091static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1092{
8bda4e4c
TM		 1093 /*
1094 * Protect the call to nfs4_state_set_mode_locked and
1095 * serialise the stateid update
1096 */
1097 write_seqlock(&state->seqlock);
003707c7 1098 if (deleg_stateid != NULL) {
f597c537 1099 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1100 set_bit(NFS_DELEGATED_STATE, &state->flags);
1101 }
1102 if (open_stateid != NULL)
dc0b027d 1103 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1104 write_sequnlock(&state->seqlock);
1105 spin_lock(&state->owner->so_lock);
dc0b027d 1106 update_open_stateflags(state, fmode);
ec073428 1107 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1108}
1109
dc0b027d 1110static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1111{
1112 struct nfs_inode *nfsi = NFS_I(state->inode);
1113 struct nfs_delegation *deleg_cur;
1114 int ret = 0;
1115
dc0b027d 1116 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1117
1118 rcu_read_lock();
1119 deleg_cur = rcu_dereference(nfsi->delegation);
1120 if (deleg_cur == NULL)
1121 goto no_delegation;
1122
1123 spin_lock(&deleg_cur->lock);
17f26b12 1124 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1125 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1126 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1127 goto no_delegation_unlock;
1128
1129 if (delegation == NULL)
1130 delegation = &deleg_cur->stateid;
f597c537 1131 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1132 goto no_delegation_unlock;
1133
b7391f44 1134 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1135 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1136 ret = 1;
1137no_delegation_unlock:
1138 spin_unlock(&deleg_cur->lock);
1139no_delegation:
1140 rcu_read_unlock();
1141
1142 if (!ret && open_stateid != NULL) {
dc0b027d 1143 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1144 ret = 1;
1145 }
1146
1147 return ret;
1148}
1149
1150
dc0b027d 1151static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1152{
1153 struct nfs_delegation *delegation;
1154
1155 rcu_read_lock();
1156 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1157 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1158 rcu_read_unlock();
1159 return;
1160 }
1161 rcu_read_unlock();
57ec14c5 1162 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1163}
1164
6ee41268 1165static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1166{
1167 struct nfs4_state *state = opendata->state;
1168 struct nfs_inode *nfsi = NFS_I(state->inode);
1169 struct nfs_delegation *delegation;
f448badd 1170 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1171 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1172 nfs4_stateid stateid;
1173 int ret = -EAGAIN;
1174
aac00a8d 1175 for (;;) {
dc0b027d 1176 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1177 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1178 if (can_open_cached(state, fmode, open_mode)) {
1179 update_open_stateflags(state, fmode);
6ee41268 1180 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1181 goto out_return_state;
1182 }
1183 spin_unlock(&state->owner->so_lock);
1184 }
34310430
TM		 1185 rcu_read_lock();
1186 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1187 if (!can_open_delegated(delegation, fmode)) {
34310430 1188 rcu_read_unlock();
aac00a8d 1189 break;
34310430 1190 }
aac00a8d 1191 /* Save the delegation */
f597c537 1192 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1193 rcu_read_unlock();
fa332941 1194 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1195 if (!opendata->is_recover) {
1196 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1197 if (ret != 0)
1198 goto out;
1199 }
aac00a8d 1200 ret = -EAGAIN;
34310430
TM		 1201
1202 /* Try to update the stateid using the delegation */
dc0b027d 1203 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1204 goto out_return_state;
aac00a8d 1205 }
aac00a8d
TM		 1206out:
1207 return ERR_PTR(ret);
1208out_return_state:
1209 atomic_inc(&state->count);
1210 return state;
1211}
1212
e23008ec
AA		 1213static void
1214nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1215{
1216 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1217 struct nfs_delegation *delegation;
1218 int delegation_flags = 0;
1219
1220 rcu_read_lock();
1221 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1222 if (delegation)
1223 delegation_flags = delegation->flags;
1224 rcu_read_unlock();
1225 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1226 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1227 "returning a delegation for "
1228 "OPEN(CLAIM_DELEGATE_CUR)\n",
1229 clp->cl_hostname);
1230 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1231 nfs_inode_set_delegation(state->inode,
1232 data->owner->so_cred,
1233 &data->o_res);
1234 else
1235 nfs_inode_reclaim_delegation(state->inode,
1236 data->owner->so_cred,
1237 &data->o_res);
1238}
1239
1240/*
1241 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1242 * and update the nfs4_state.
1243 */
1244static struct nfs4_state *
1245_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1246{
1247 struct inode *inode = data->state->inode;
1248 struct nfs4_state *state = data->state;
1249 int ret;
1250
1251 if (!data->rpc_done) {
1252 ret = data->rpc_status;
1253 goto err;
1254 }
1255
1256 ret = -ESTALE;
1257 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1258 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1259 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1260 goto err;
1261
1262 ret = -ENOMEM;
1263 state = nfs4_get_open_state(inode, data->owner);
1264 if (state == NULL)
1265 goto err;
1266
1267 ret = nfs_refresh_inode(inode, &data->f_attr);
1268 if (ret)
1269 goto err;
1270
aa9c2669
DQ		 1271 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1272
e23008ec
AA		 1273 if (data->o_res.delegation_type != 0)
1274 nfs4_opendata_check_deleg(data, state);
1275 update_open_stateid(state, &data->o_res.stateid, NULL,
1276 data->o_arg.fmode);
1277
1278 return state;
1279err:
1280 return ERR_PTR(ret);
1281
1282}
1283
1284static struct nfs4_state *
1285_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1286{
1287 struct inode *inode;
1288 struct nfs4_state *state = NULL;
1b370bc2 1289 int ret;
24ac23ab 1290
aac00a8d 1291 if (!data->rpc_done) {
6ee41268 1292 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1293 goto out;
1294 }
1295
1b370bc2 1296 ret = -EAGAIN;
24ac23ab 1297 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1298 goto err;
1775fd3e 1299 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1300 ret = PTR_ERR(inode);
03f28e3a 1301 if (IS_ERR(inode))
1b370bc2
TM		 1302 goto err;
1303 ret = -ENOMEM;
24ac23ab
TM		 1304 state = nfs4_get_open_state(inode, data->owner);
1305 if (state == NULL)
1b370bc2 1306 goto err_put_inode;
e23008ec
AA		 1307 if (data->o_res.delegation_type != 0)
1308 nfs4_opendata_check_deleg(data, state);
34310430 1309 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1310 data->o_arg.fmode);
24ac23ab 1311 iput(inode);
aac00a8d 1312out:
7aa262b5 1313 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1314 return state;
1b370bc2
TM		 1315err_put_inode:
1316 iput(inode);
1317err:
1318 return ERR_PTR(ret);
24ac23ab
TM		 1319}
1320
e23008ec
AA		 1321static struct nfs4_state *
1322nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1323{
1324 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1325 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1326 return _nfs4_opendata_to_nfs4_state(data);
1327}
1328
864472e9
TM		 1329static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1330{
1331 struct nfs_inode *nfsi = NFS_I(state->inode);
1332 struct nfs_open_context *ctx;
1333
1334 spin_lock(&state->inode->i_lock);
1335 list_for_each_entry(ctx, &nfsi->open_files, list) {
1336 if (ctx->state != state)
1337 continue;
1338 get_nfs_open_context(ctx);
1339 spin_unlock(&state->inode->i_lock);
1340 return ctx;
1341 }
1342 spin_unlock(&state->inode->i_lock);
1343 return ERR_PTR(-ENOENT);
1344}
1345
4a1c0893
TM		 1346static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1347 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1348{
1349 struct nfs4_opendata *opendata;
1350
4a1c0893 1351 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1352 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1353 if (opendata == NULL)
1354 return ERR_PTR(-ENOMEM);
1355 opendata->state = state;
1356 atomic_inc(&state->count);
1357 return opendata;
1358}
1359
dc0b027d 1360static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1361{
2ced46c2 1362 struct nfs4_state *newstate;
864472e9
TM		 1363 int ret;
1364
dc0b027d
TM		 1365 opendata->o_arg.open_flags = 0;
1366 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1367 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1368 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1369 nfs4_init_opendata_res(opendata);
b257957e 1370 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1371 if (ret != 0)
1372 return ret;
2ced46c2 1373 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1374 if (IS_ERR(newstate))
1375 return PTR_ERR(newstate);
643168c2 1376 nfs4_close_state(newstate, fmode);
2ced46c2 1377 *res = newstate;
864472e9
TM		 1378 return 0;
1379}
1380
1381static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1382{
864472e9 1383 struct nfs4_state *newstate;
864472e9
TM		 1384 int ret;
1385
1386 /* memory barrier prior to reading state->n_* */
2ced46c2 1387 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1388 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1389 smp_rmb();
1390 if (state->n_rdwr != 0) {
b0ed9dbc 1391 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1392 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1393 if (ret != 0)
1394 return ret;
2ced46c2
TM		 1395 if (newstate != state)
1396 return -ESTALE;
864472e9
TM		 1397 }
1398 if (state->n_wronly != 0) {
b0ed9dbc 1399 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1400 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1401 if (ret != 0)
1402 return ret;
2ced46c2
TM		 1403 if (newstate != state)
1404 return -ESTALE;
864472e9
TM		 1405 }
1406 if (state->n_rdonly != 0) {
b0ed9dbc 1407 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1408 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1409 if (ret != 0)
1410 return ret;
2ced46c2
TM		 1411 if (newstate != state)
1412 return -ESTALE;
864472e9 1413 }
1ac7e2fd
TM		 1414 /*
1415 * We may have performed cached opens for all three recoveries.
1416 * Check if we need to update the current stateid.
1417 */
1418 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1419 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1420 write_seqlock(&state->seqlock);
1ac7e2fd 1421 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1422 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1423 write_sequnlock(&state->seqlock);
1ac7e2fd 1424 }
864472e9
TM		 1425 return 0;
1426}
1427
1da177e4
LT		 1428/*
1429 * OPEN_RECLAIM:
1430 * reclaim state on the server after a reboot.
1da177e4 1431 */
539cd03a 1432static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1433{
1ac7e2fd 1434 struct nfs_delegation *delegation;
864472e9 1435 struct nfs4_opendata *opendata;
dc0b027d 1436 fmode_t delegation_type = 0;
1da177e4
LT		 1437 int status;
1438
4a1c0893
TM		 1439 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1440 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1441 if (IS_ERR(opendata))
1442 return PTR_ERR(opendata);
1ac7e2fd
TM		 1443 rcu_read_lock();
1444 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1445 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1446 delegation_type = delegation->type;
1ac7e2fd 1447 rcu_read_unlock();
864472e9
TM		 1448 opendata->o_arg.u.delegation_type = delegation_type;
1449 status = nfs4_open_recover(opendata, state);
c6d00e63 1450 nfs4_opendata_put(opendata);
1da177e4
LT		 1451 return status;
1452}
1453
539cd03a 1454static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1455{
1456 struct nfs_server *server = NFS_SERVER(state->inode);
1457 struct nfs4_exception exception = { };
1458 int err;
1459 do {
539cd03a 1460 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1461 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1462 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1463 continue;
168667c4 1464 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1465 break;
1466 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1467 } while (exception.retry);
1468 return err;
1469}
1470
864472e9
TM		 1471static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1472{
1473 struct nfs_open_context *ctx;
1474 int ret;
1475
1476 ctx = nfs4_state_find_open_context(state);
1477 if (IS_ERR(ctx))
91876b13 1478 return -EAGAIN;
539cd03a 1479 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1480 put_nfs_open_context(ctx);
1481 return ret;
1482}
1483
db4f2e63 1484static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1485{
be76b5b6
TM		 1486 switch (err) {
1487 default:
1488 printk(KERN_ERR "NFS: %s: unhandled error "
1489 "%d.\n", __func__, err);
1490 case 0:
1491 case -ENOENT:
1492 case -ESTALE:
1493 break;
1494 case -NFS4ERR_BADSESSION:
1495 case -NFS4ERR_BADSLOT:
1496 case -NFS4ERR_BAD_HIGH_SLOT:
1497 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1498 case -NFS4ERR_DEADSESSION:
1499 set_bit(NFS_DELEGATED_STATE, &state->flags);
1500 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1501 return -EAGAIN;
1502 case -NFS4ERR_STALE_CLIENTID:
1503 case -NFS4ERR_STALE_STATEID:
1504 set_bit(NFS_DELEGATED_STATE, &state->flags);
1505 case -NFS4ERR_EXPIRED:
1506 /* Don't recall a delegation if it was lost */
1507 nfs4_schedule_lease_recovery(server->nfs_client);
1508 return -EAGAIN;
1509 case -NFS4ERR_DELEG_REVOKED:
1510 case -NFS4ERR_ADMIN_REVOKED:
1511 case -NFS4ERR_BAD_STATEID:
db4f2e63 1512 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1513 nfs_inode_find_state_and_recover(state->inode,
1514 stateid);
1515 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1516 return 0;
1517 case -NFS4ERR_DELAY:
1518 case -NFS4ERR_GRACE:
1519 set_bit(NFS_DELEGATED_STATE, &state->flags);
1520 ssleep(1);
1521 return -EAGAIN;
db4f2e63
TM		 1522 case -ENOMEM:
1523 case -NFS4ERR_DENIED:
1524 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1525 return 0;
be76b5b6 1526 }
1da177e4
LT		 1527 return err;
1528}
1529
db4f2e63
TM		 1530int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1531{
1532 struct nfs_server *server = NFS_SERVER(state->inode);
1533 struct nfs4_opendata *opendata;
1534 int err;
1535
1536 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1537 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1538 if (IS_ERR(opendata))
1539 return PTR_ERR(opendata);
1540 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1541 err = nfs4_open_recover(opendata, state);
1542 nfs4_opendata_put(opendata);
1543 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1544}
1545
cdd4e68b
TM		 1546static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1547{
1548 struct nfs4_opendata *data = calldata;
1549
1550 data->rpc_status = task->tk_status;
26e976a8 1551 if (data->rpc_status == 0) {
f597c537 1552 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1553 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1554 renew_lease(data->o_res.server, data->timestamp);
3e309914 1555 data->rpc_done = 1;
26e976a8 1556 }
cdd4e68b
TM		 1557}
1558
1559static void nfs4_open_confirm_release(void *calldata)
1560{
1561 struct nfs4_opendata *data = calldata;
1562 struct nfs4_state *state = NULL;
1563
1564 /* If this request hasn't been cancelled, do nothing */
1565 if (data->cancelled == 0)
1566 goto out_free;
1567 /* In case of error, no cleanup! */
3e309914 1568 if (!data->rpc_done)
cdd4e68b 1569 goto out_free;
cdd4e68b 1570 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1571 if (!IS_ERR(state))
643168c2 1572 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1573out_free:
c6d00e63 1574 nfs4_opendata_put(data);
cdd4e68b
TM		 1575}
1576
1577static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1578 .rpc_call_done = nfs4_open_confirm_done,
1579 .rpc_release = nfs4_open_confirm_release,
1580};
1581
1582/*
1583 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1584 */
1585static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1586{
1587 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1588 struct rpc_task *task;
5138fde0
TM		 1589 struct rpc_message msg = {
1590 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1591 .rpc_argp = &data->c_arg,
1592 .rpc_resp = &data->c_res,
1593 .rpc_cred = data->owner->so_cred,
1594 };
c970aa85
TM		 1595 struct rpc_task_setup task_setup_data = {
1596 .rpc_client = server->client,
5138fde0 1597 .rpc_message = &msg,
c970aa85
TM		 1598 .callback_ops = &nfs4_open_confirm_ops,
1599 .callback_data = data,
101070ca 1600 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1601 .flags = RPC_TASK_ASYNC,
1602 };
1da177e4
LT		 1603 int status;
1604
c6d00e63 1605 kref_get(&data->kref);
3e309914
TM		 1606 data->rpc_done = 0;
1607 data->rpc_status = 0;
5138fde0 1608 data->timestamp = jiffies;
c970aa85 1609 task = rpc_run_task(&task_setup_data);
7a1218a2 1610 if (IS_ERR(task))
cdd4e68b 1611 return PTR_ERR(task);
cdd4e68b
TM		 1612 status = nfs4_wait_for_completion_rpc_task(task);
1613 if (status != 0) {
1614 data->cancelled = 1;
1615 smp_wmb();
1616 } else
1617 status = data->rpc_status;
e6b3c4db 1618 rpc_put_task(task);
1da177e4
LT		 1619 return status;
1620}
1621
24ac23ab 1622static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1623{
24ac23ab
TM		 1624 struct nfs4_opendata *data = calldata;
1625 struct nfs4_state_owner *sp = data->owner;
549b19cc 1626 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1627
24ac23ab 1628 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1629 goto out_wait;
aac00a8d
TM		 1630 /*
1631 * Check if we still need to send an OPEN call, or if we can use
1632 * a delegation instead.
1633 */
1634 if (data->state != NULL) {
1635 struct nfs_delegation *delegation;
1636
dc0b027d 1637 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1638 goto out_no_action;
aac00a8d
TM		 1639 rcu_read_lock();
1640 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1641 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1642 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1643 can_open_delegated(delegation, data->o_arg.fmode))
1644 goto unlock_no_action;
aac00a8d
TM		 1645 rcu_read_unlock();
1646 }
95b72eb0 1647 /* Update client id. */
549b19cc 1648 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1649 switch (data->o_arg.claim) {
1650 case NFS4_OPEN_CLAIM_PREVIOUS:
1651 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1652 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1653 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1654 case NFS4_OPEN_CLAIM_FH:
1655 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1656 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1657 }
26e976a8 1658 data->timestamp = jiffies;
035168ab 1659 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1660 &data->o_arg.seq_args,
2240a9e2
TM		 1661 &data->o_res.seq_res,
1662 task) != 0)
1663 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1664
1665 /* Set the create mode (note dependency on the session type) */
1666 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1667 if (data->o_arg.open_flags & O_EXCL) {
1668 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1669 if (nfs4_has_persistent_session(clp))
1670 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1671 else if (clp->cl_mvops->minor_version > 0)
1672 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1673 }
6ee41268 1674 return;
652f89f6
TM		 1675unlock_no_action:
1676 rcu_read_unlock();
6ee41268
TM		 1677out_no_action:
1678 task->tk_action = NULL;
c8da19b9 1679out_wait:
b75ad4cd 1680 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1681}
1682
24ac23ab
TM		 1683static void nfs4_open_done(struct rpc_task *task, void *calldata)
1684{
1685 struct nfs4_opendata *data = calldata;
1da177e4 1686
24ac23ab 1687 data->rpc_status = task->tk_status;
d898528c 1688
14516c3a
TM		 1689 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1690 return;
d898528c 1691
24ac23ab 1692 if (task->tk_status == 0) {
807d66d8
TM		 1693 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1694 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1695 case S_IFREG:
1696 break;
1697 case S_IFLNK:
24ac23ab 1698 data->rpc_status = -ELOOP;
6f926b5b
TM		 1699 break;
1700 case S_IFDIR:
24ac23ab 1701 data->rpc_status = -EISDIR;
6f926b5b
TM		 1702 break;
1703 default:
24ac23ab 1704 data->rpc_status = -ENOTDIR;
807d66d8 1705 }
6f926b5b 1706 }
26e976a8 1707 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1708 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1709 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1710 }
3e309914 1711 data->rpc_done = 1;
24ac23ab 1712}
6f926b5b 1713
24ac23ab
TM		 1714static void nfs4_open_release(void *calldata)
1715{
1716 struct nfs4_opendata *data = calldata;
1717 struct nfs4_state *state = NULL;
1718
1719 /* If this request hasn't been cancelled, do nothing */
1720 if (data->cancelled == 0)
1721 goto out_free;
1722 /* In case of error, no cleanup! */
3e309914 1723 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1724 goto out_free;
1725 /* In case we need an open_confirm, no cleanup! */
1726 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1727 goto out_free;
24ac23ab 1728 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1729 if (!IS_ERR(state))
643168c2 1730 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1731out_free:
c6d00e63 1732 nfs4_opendata_put(data);
24ac23ab
TM		 1733}
1734
1735static const struct rpc_call_ops nfs4_open_ops = {
1736 .rpc_call_prepare = nfs4_open_prepare,
1737 .rpc_call_done = nfs4_open_done,
1738 .rpc_release = nfs4_open_release,
1739};
1740
b257957e 1741static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1742{
1743 struct inode *dir = data->dir->d_inode;
1744 struct nfs_server *server = NFS_SERVER(dir);
1745 struct nfs_openargs *o_arg = &data->o_arg;
1746 struct nfs_openres *o_res = &data->o_res;
1747 struct rpc_task *task;
5138fde0
TM		 1748 struct rpc_message msg = {
1749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1750 .rpc_argp = o_arg,
1751 .rpc_resp = o_res,
1752 .rpc_cred = data->owner->so_cred,
1753 };
c970aa85
TM		 1754 struct rpc_task_setup task_setup_data = {
1755 .rpc_client = server->client,
5138fde0 1756 .rpc_message = &msg,
c970aa85
TM		 1757 .callback_ops = &nfs4_open_ops,
1758 .callback_data = data,
101070ca 1759 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1760 .flags = RPC_TASK_ASYNC,
1761 };
24ac23ab
TM		 1762 int status;
1763
9d12b216 1764 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1765 kref_get(&data->kref);
3e309914
TM		 1766 data->rpc_done = 0;
1767 data->rpc_status = 0;
2ced46c2 1768 data->cancelled = 0;
bdeca1b7
TM		 1769 data->is_recover = 0;
1770 if (isrecover) {
8fe72bac 1771 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1772 data->is_recover = 1;
1773 }
c970aa85 1774 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1775 if (IS_ERR(task))
1776 return PTR_ERR(task);
1777 status = nfs4_wait_for_completion_rpc_task(task);
1778 if (status != 0) {
1779 data->cancelled = 1;
1780 smp_wmb();
1781 } else
1782 status = data->rpc_status;
1783 rpc_put_task(task);
1784
1785 return status;
1786}
1787
1788static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1789{
1790 struct inode *dir = data->dir->d_inode;
1791 struct nfs_openres *o_res = &data->o_res;
1792 int status;
1793
1794 status = nfs4_run_open_task(data, 1);
1795 if (status != 0 || !data->rpc_done)
1796 return status;
1797
6926afd1
TM		 1798 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1799
b257957e
AB		 1800 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1801 status = _nfs4_proc_open_confirm(data);
1802 if (status != 0)
1803 return status;
1804 }
1805
1806 return status;
1807}
1808
6168f62c
WAA		 1809static int nfs4_opendata_access(struct rpc_cred *cred,
1810 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1811 struct nfs4_state *state, fmode_t fmode,
1812 int openflags)
6168f62c
WAA		 1813{
1814 struct nfs_access_entry cache;
1815 u32 mask;
1816
1817 /* access call failed or for some reason the server doesn't
1818 * support any access modes -- defer access call until later */
1819 if (opendata->o_res.access_supported == 0)
1820 return 0;
1821
1822 mask = 0;
bbd3a8ee 1823 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1824 * write mode bits, but POSIX allows the creating process to write.
1825 * use openflags to check for exec, because fmode won't
1826 * always have FMODE_EXEC set when file open for exec. */
1827 if (openflags & __FMODE_EXEC) {
1828 /* ONLY check for exec rights */
1829 mask = MAY_EXEC;
1830 } else if (fmode & FMODE_READ)
1831 mask = MAY_READ;
6168f62c
WAA		 1832
1833 cache.cred = cred;
1834 cache.jiffies = jiffies;
1835 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1836 nfs_access_add_cache(state->inode, &cache);
1837
bbd3a8ee 1838 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1839 return 0;
1840
1841 /* even though OPEN succeeded, access is denied. Close the file */
1842 nfs4_close_state(state, fmode);
998f40b5 1843 return -EACCES;
6168f62c
WAA		 1844}
1845
b257957e
AB		 1846/*
1847 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1848 */
1849static int _nfs4_proc_open(struct nfs4_opendata *data)
1850{
1851 struct inode *dir = data->dir->d_inode;
1852 struct nfs_server *server = NFS_SERVER(dir);
1853 struct nfs_openargs *o_arg = &data->o_arg;
1854 struct nfs_openres *o_res = &data->o_res;
1855 int status;
1856
1857 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1858 if (!data->rpc_done)
1859 return status;
1860 if (status != 0) {
1861 if (status == -NFS4ERR_BADNAME &&
1862 !(o_arg->open_flags & O_CREAT))
1863 return -ENOENT;
24ac23ab 1864 return status;
08ef7bd3 1865 }
24ac23ab 1866
6926afd1
TM		 1867 nfs_fattr_map_and_free_names(server, &data->f_attr);
1868
90ff0c54 1869 if (o_arg->open_flags & O_CREAT)
56ae19f3 1870 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1871 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1872 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1873 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1874 status = _nfs4_proc_open_confirm(data);
1da177e4 1875 if (status != 0)
24ac23ab 1876 return status;
1da177e4
LT		 1877 }
1878 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1879 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1880 return 0;
1da177e4
LT		 1881}
1882
d83217c1
AA		 1883static int nfs4_recover_expired_lease(struct nfs_server *server)
1884{
1885 return nfs4_client_recover_expired_lease(server->nfs_client);
1886}
1887
1da177e4
LT		 1888/*
1889 * OPEN_EXPIRED:
1890 * reclaim state on the server after a network partition.
1891 * Assumes caller holds the appropriate lock
1892 */
539cd03a 1893static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1894{
e56e0b78 1895 struct nfs4_opendata *opendata;
864472e9 1896 int ret;
1da177e4 1897
4a1c0893 1898 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1899 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1900 if (IS_ERR(opendata))
1901 return PTR_ERR(opendata);
864472e9 1902 ret = nfs4_open_recover(opendata, state);
35d05778 1903 if (ret == -ESTALE)
3d4ff43d 1904 d_drop(ctx->dentry);
c6d00e63 1905 nfs4_opendata_put(opendata);
864472e9 1906 return ret;
1da177e4
LT		 1907}
1908
a9ed2e25 1909static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1910{
539cd03a 1911 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1912 struct nfs4_exception exception = { };
1913 int err;
1914
1915 do {
539cd03a 1916 err = _nfs4_open_expired(ctx, state);
42113a75 1917 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1918 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1919 continue;
a9ed2e25
TM		 1920 switch (err) {
1921 default:
1922 goto out;
1923 case -NFS4ERR_GRACE:
1924 case -NFS4ERR_DELAY:
1925 nfs4_handle_exception(server, err, &exception);
1926 err = 0;
1927 }
202b50dc 1928 } while (exception.retry);
a9ed2e25 1929out:
202b50dc
TM		 1930 return err;
1931}
1932
1da177e4
LT		 1933static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1934{
1da177e4 1935 struct nfs_open_context *ctx;
864472e9 1936 int ret;
1da177e4 1937
864472e9
TM		 1938 ctx = nfs4_state_find_open_context(state);
1939 if (IS_ERR(ctx))
91876b13 1940 return -EAGAIN;
539cd03a 1941 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1942 put_nfs_open_context(ctx);
1943 return ret;
1da177e4
LT		 1944}
1945
f062eb6c 1946#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1947static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1948{
f062eb6c 1949 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 1950 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 1951 struct nfs_delegation *delegation;
1952 struct rpc_cred *cred = NULL;
1953 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 1954
1955 /* If a state reset has been done, test_stateid is unneeded */
1956 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1957 return;
1958
ab7cb0df
TM		 1959 /* Get the delegation credential for use by test/free_stateid */
1960 rcu_read_lock();
1961 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1962 if (delegation != NULL &&
1963 nfs4_stateid_match(&delegation->stateid, stateid)) {
1964 cred = get_rpccred(delegation->cred);
1965 rcu_read_unlock();
1966 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 1967 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 1968 } else
1969 rcu_read_unlock();
1970
3e60ffdd
CL		 1971 if (status != NFS_OK) {
1972 /* Free the stateid unless the server explicitly
1973 * informs us the stateid is unrecognized. */
1974 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 1975 nfs41_free_stateid(server, stateid, cred);
6938867e 1976 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1977
6938867e
BS		 1978 write_seqlock(&state->seqlock);
1979 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1980 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1981 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1982 }
ab7cb0df
TM		 1983
1984 if (cred != NULL)
1985 put_rpccred(cred);
3e60ffdd
CL		 1986}
1987
1988/**
1989 * nfs41_check_open_stateid - possibly free an open stateid
1990 *
1991 * @state: NFSv4 state for an inode
1992 *
1993 * Returns NFS_OK if recovery for this stateid is now finished.
1994 * Otherwise a negative NFS4ERR value is returned.
1995 */
1996static int nfs41_check_open_stateid(struct nfs4_state *state)
1997{
1998 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1999 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2000 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2001 int status;
2002
2003 /* If a state reset has been done, test_stateid is unneeded */
2004 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2005 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2006 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2007 return -NFS4ERR_BAD_STATEID;
2008
ab7cb0df 2009 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2010 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2011 if (status != NFS_OK) {
2012 /* Free the stateid unless the server explicitly
2013 * informs us the stateid is unrecognized. */
2014 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2015 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2016
2017 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2018 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2019 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2020 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2021 }
2022 return status;
2023}
2024
2025static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2026{
eb64cf96 2027 int status;
b01dd1d8 2028
3e60ffdd
CL		 2029 nfs41_clear_delegation_stateid(state);
2030 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2031 if (status != NFS_OK)
2032 status = nfs4_open_expired(sp, state);
2033 return status;
f062eb6c
BS		 2034}
2035#endif
2036
aa53ed54
JL		 2037/*
2038 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2039 * fields corresponding to attributes that were used to store the verifier.
2040 * Make sure we clobber those fields in the later setattr call
2041 */
2042static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2043{
2044 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2045 !(sattr->ia_valid & ATTR_ATIME_SET))
2046 sattr->ia_valid |= ATTR_ATIME;
2047
2048 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2049 !(sattr->ia_valid & ATTR_MTIME_SET))
2050 sattr->ia_valid |= ATTR_MTIME;
2051}
2052
c21443c2
TM		 2053static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2054 fmode_t fmode,
2055 int flags,
3efb9722 2056 struct nfs_open_context *ctx)
c21443c2
TM		 2057{
2058 struct nfs4_state_owner *sp = opendata->owner;
2059 struct nfs_server *server = sp->so_server;
275bb307 2060 struct dentry *dentry;
c21443c2
TM		 2061 struct nfs4_state *state;
2062 unsigned int seq;
2063 int ret;
2064
2065 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2066
2067 ret = _nfs4_proc_open(opendata);
2068 if (ret != 0)
2069 goto out;
2070
2071 state = nfs4_opendata_to_nfs4_state(opendata);
2072 ret = PTR_ERR(state);
2073 if (IS_ERR(state))
2074 goto out;
2075 if (server->caps & NFS_CAP_POSIX_LOCK)
2076 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2077
275bb307
TM		 2078 dentry = opendata->dentry;
2079 if (dentry->d_inode == NULL) {
2080 /* FIXME: Is this d_drop() ever needed? */
2081 d_drop(dentry);
2082 dentry = d_add_unique(dentry, igrab(state->inode));
2083 if (dentry == NULL) {
2084 dentry = opendata->dentry;
2085 } else if (dentry != ctx->dentry) {
2086 dput(ctx->dentry);
2087 ctx->dentry = dget(dentry);
2088 }
2089 nfs_set_verifier(dentry,
2090 nfs_save_change_attribute(opendata->dir->d_inode));
2091 }
2092
c21443c2
TM		 2093 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2094 if (ret != 0)
2095 goto out;
2096
3efb9722 2097 ctx->state = state;
c45ffdd2
TM		 2098 if (dentry->d_inode == state->inode) {
2099 nfs_inode_attach_open_context(ctx);
2100 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2101 nfs4_schedule_stateid_recovery(server, state);
2102 }
c21443c2
TM		 2103out:
2104 return ret;
2105}
2106
1da177e4 2107/*
24ac23ab 2108 * Returns a referenced nfs4_state
1da177e4 2109 */
82be417a 2110static int _nfs4_do_open(struct inode *dir,
4197a055 2111 struct nfs_open_context *ctx,
82be417a
AA		 2112 int flags,
2113 struct iattr *sattr,
959d921f 2114 struct nfs4_label *label)
1da177e4
LT		 2115{
2116 struct nfs4_state_owner *sp;
2117 struct nfs4_state *state = NULL;
2118 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2119 struct nfs4_opendata *opendata;
4197a055
TM		 2120 struct dentry *dentry = ctx->dentry;
2121 struct rpc_cred *cred = ctx->cred;
2122 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2123 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2124 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2125 struct nfs4_label *olabel = NULL;
aac00a8d 2126 int status;
1da177e4
LT		 2127
2128 /* Protect against reboot recovery conflicts */
1da177e4 2129 status = -ENOMEM;
d1e284d5
TM		 2130 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2131 if (sp == NULL) {
1da177e4
LT		 2132 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2133 goto out_err;
2134 }
58d9714a
TM		 2135 status = nfs4_recover_expired_lease(server);
2136 if (status != 0)
b4454fe1 2137 goto err_put_state_owner;
82a2c1b7
AV		 2138 if (dentry->d_inode != NULL)
2139 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2140 status = -ENOMEM;
49f9a0fa
TM		 2141 if (dentry->d_inode)
2142 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2143 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2144 label, claim, GFP_KERNEL);
e56e0b78 2145 if (opendata == NULL)
95d35cb4 2146 goto err_put_state_owner;
1da177e4 2147
14c43f76
DQ		 2148 if (label) {
2149 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2150 if (IS_ERR(olabel)) {
2151 status = PTR_ERR(olabel);
2152 goto err_opendata_put;
2153 }
2154 }
2155
82be417a
AA		 2156 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2157 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2158 if (!opendata->f_attr.mdsthreshold)
14c43f76 2159 goto err_free_label;
1549210f 2160 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2161 }
82a2c1b7
AV		 2162 if (dentry->d_inode != NULL)
2163 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2164
3efb9722 2165 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2166 if (status != 0)
14c43f76 2167 goto err_free_label;
3efb9722 2168 state = ctx->state;
6168f62c 2169
549b19cc
TM		 2170 if ((opendata->o_arg.open_flags & O_EXCL) &&
2171 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2172 nfs4_exclusive_attrset(opendata, sattr);
2173
2174 nfs_fattr_init(opendata->o_res.f_attr);
2175 status = nfs4_do_setattr(state->inode, cred,
2176 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2177 state, label, olabel);
2178 if (status == 0) {
0ab64e0e 2179 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2180 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2181 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2182 }
0ab64e0e 2183 }
82be417a
AA		 2184
2185 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2186 *ctx_th = opendata->f_attr.mdsthreshold;
2187 else
2188 kfree(opendata->f_attr.mdsthreshold);
2189 opendata->f_attr.mdsthreshold = NULL;
2190
14c43f76
DQ		 2191 nfs4_label_free(olabel);
2192
c6d00e63 2193 nfs4_opendata_put(opendata);
1da177e4 2194 nfs4_put_state_owner(sp);
1da177e4 2195 return 0;
14c43f76
DQ		 2196err_free_label:
2197 nfs4_label_free(olabel);
c6d00e63 2198err_opendata_put:
82be417a 2199 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2200 nfs4_opendata_put(opendata);
e56e0b78
TM		 2201err_put_state_owner:
2202 nfs4_put_state_owner(sp);
1da177e4 2203out_err:
1da177e4
LT		 2204 return status;
2205}
2206
2207
82be417a 2208static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2209 struct nfs_open_context *ctx,
82be417a
AA		 2210 int flags,
2211 struct iattr *sattr,
959d921f 2212 struct nfs4_label *label)
1da177e4 2213{
49f9a0fa 2214 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2215 struct nfs4_exception exception = { };
2216 struct nfs4_state *res;
2217 int status;
2218
2219 do {
959d921f 2220 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2221 res = ctx->state;
42113a75 2222 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2223 if (status == 0)
2224 break;
2225 /* NOTE: BAD_SEQID means the server and client disagree about the
2226 * book-keeping w.r.t. state-changing operations
2227 * (OPEN/CLOSE/LOCK/LOCKU...)
2228 * It is actually a sign of a bug on the client or on the server.
2229 *
2230 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2231 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2232 * have unhashed the old state_owner for us, and that we can
2233 * therefore safely retry using a new one. We should still warn
2234 * the user though...
2235 */
2236 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2237 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2238 " returned a bad sequence-id error!\n",
2239 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2240 exception.retry = 1;
2241 continue;
2242 }
550f5747
TM		 2243 /*
2244 * BAD_STATEID on OPEN means that the server cancelled our
2245 * state before it received the OPEN_CONFIRM.
2246 * Recover by retrying the request as per the discussion
2247 * on Page 181 of RFC3530.
2248 */
2249 if (status == -NFS4ERR_BAD_STATEID) {
2250 exception.retry = 1;
2251 continue;
2252 }
aac00a8d
TM		 2253 if (status == -EAGAIN) {
2254 /* We must have found a delegation */
2255 exception.retry = 1;
2256 continue;
2257 }
49f9a0fa
TM		 2258 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2259 continue;
2260 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2261 status, &exception));
2262 } while (exception.retry);
2263 return res;
2264}
2265
659bfcd6
TM		 2266static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2267 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2268 struct nfs4_state *state, struct nfs4_label *ilabel,
2269 struct nfs4_label *olabel)
1da177e4 2270{
3e4f6290 2271 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2272 struct nfs_setattrargs arg = {
3e4f6290 2273 .fh = NFS_FH(inode),
1da177e4
LT		 2274 .iap = sattr,
2275 .server = server,
2276 .bitmask = server->attr_bitmask,
1775fd3e 2277 .label = ilabel,
1da177e4
LT		 2278 };
2279 struct nfs_setattrres res = {
2280 .fattr = fattr,
1775fd3e 2281 .label = olabel,
1da177e4
LT		 2282 .server = server,
2283 };
2284 struct rpc_message msg = {
659bfcd6
TM		 2285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2286 .rpc_argp = &arg,
2287 .rpc_resp = &res,
2288 .rpc_cred = cred,
1da177e4 2289 };
26e976a8 2290 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2291 fmode_t fmode;
2292 bool truncate;
65e4308d 2293 int status;
1da177e4 2294
aa9c2669
DQ		 2295 arg.bitmask = nfs4_bitmask(server, ilabel);
2296 if (ilabel)
2297 arg.bitmask = nfs4_bitmask(server, olabel);
2298
0e574af1 2299 nfs_fattr_init(fattr);
1da177e4 2300
ee3ae84e
TM		 2301 /* Servers should only apply open mode checks for file size changes */
2302 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2303 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2304
2305 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2306 /* Use that stateid */
2307 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2308 struct nfs_lockowner lockowner = {
2309 .l_owner = current->files,
2310 .l_pid = current->tgid,
2311 };
4fc8796d 2312 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2313 &lockowner);
08e9eac4 2314 } else
f597c537 2315 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2316
7c513058 2317 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2318 if (status == 0 && state != NULL)
2319 renew_lease(server, timestamp);
65e4308d 2320 return status;
1da177e4
LT		 2321}
2322
659bfcd6
TM		 2323static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2324 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2325 struct nfs4_state *state, struct nfs4_label *ilabel,
2326 struct nfs4_label *olabel)
1da177e4 2327{
3e4f6290 2328 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2329 struct nfs4_exception exception = {
2330 .state = state,
3114ea7a 2331 .inode = inode,
a1d0b5ee 2332 };
1da177e4
LT		 2333 int err;
2334 do {
1775fd3e 2335 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2336 trace_nfs4_setattr(inode, err);
451146be
TM		 2337 switch (err) {
2338 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2339 if (!(sattr->ia_valid & ATTR_SIZE)) {
2340 pr_warn_once("NFSv4: server %s is incorrectly "
2341 "applying open mode checks to "
2342 "a SETATTR that is not "
2343 "changing file size.\n",
2344 server->nfs_client->cl_hostname);
2345 }
451146be
TM		 2346 if (state && !(state->state & FMODE_WRITE)) {
2347 err = -EBADF;
2348 if (sattr->ia_valid & ATTR_OPEN)
2349 err = -EACCES;
2350 goto out;
2351 }
2352 }
2353 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2354 } while (exception.retry);
451146be 2355out:
1da177e4
LT		 2356 return err;
2357}
2358
2359struct nfs4_closedata {
2360 struct inode *inode;
2361 struct nfs4_state *state;
2362 struct nfs_closeargs arg;
2363 struct nfs_closeres res;
516a6af6 2364 struct nfs_fattr fattr;
26e976a8 2365 unsigned long timestamp;
f7e8917a
FI		 2366 bool roc;
2367 u32 roc_barrier;
1da177e4
LT		 2368};
2369
963d8fe5 2370static void nfs4_free_closedata(void *data)
9512135d 2371{
963d8fe5
TM		 2372 struct nfs4_closedata *calldata = data;
2373 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2374 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2375
f7e8917a
FI		 2376 if (calldata->roc)
2377 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2378 nfs4_put_open_state(calldata->state);
2379 nfs_free_seqid(calldata->arg.seqid);
9512135d 2380 nfs4_put_state_owner(sp);
322b2b90 2381 nfs_sb_deactive(sb);
9512135d
TM		 2382 kfree(calldata);
2383}
2384
88069f77
TM		 2385static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2386 fmode_t fmode)
2387{
2388 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2389 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2390 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2391 case FMODE_WRITE:
88069f77 2392 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2393 break;
2394 case FMODE_READ:
88069f77 2395 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2396 break;
2397 case 0:
2398 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2399 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2400 clear_bit(NFS_OPEN_STATE, &state->flags);
2401 }
88069f77
TM		 2402 spin_unlock(&state->owner->so_lock);
2403}
2404
963d8fe5 2405static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2406{
963d8fe5 2407 struct nfs4_closedata *calldata = data;
1da177e4 2408 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2409 struct nfs_server *server = NFS_SERVER(calldata->inode);
2410
a3ca5651 2411 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2412 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2413 return;
42113a75 2414 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2415 /* hmm. we are done with the inode, and in the process of freeing
2416 * the state_owner. we keep this around to process errors
2417 */
1da177e4
LT		 2418 switch (task->tk_status) {
2419 case 0:
f7e8917a
FI		 2420 if (calldata->roc)
2421 pnfs_roc_set_barrier(state->inode,
2422 calldata->roc_barrier);
45328c35 2423 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2424 renew_lease(server, calldata->timestamp);
88069f77
TM		 2425 nfs4_close_clear_stateid_flags(state,
2426 calldata->arg.fmode);
1da177e4
LT		 2427 break;
2428 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2429 case -NFS4ERR_OLD_STATEID:
2430 case -NFS4ERR_BAD_STATEID:
1da177e4 2431 case -NFS4ERR_EXPIRED:
dc0b027d 2432 if (calldata->arg.fmode == 0)
9e33bed5 2433 break;
1da177e4 2434 default:
72211dbe
TM		 2435 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2436 rpc_restart_call_prepare(task);
1da177e4 2437 }
72211dbe 2438 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2439 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2440 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2441}
2442
4ce70ada 2443static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2444{
4ce70ada 2445 struct nfs4_closedata *calldata = data;
9512135d 2446 struct nfs4_state *state = calldata->state;
7fdab069 2447 struct inode *inode = calldata->inode;
88069f77 2448 int call_close = 0;
9512135d 2449
a3ca5651 2450 dprintk("%s: begin!\n", __func__);
963d8fe5 2451 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2452 goto out_wait;
003707c7 2453
88069f77
TM		 2454 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2455 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2456 spin_lock(&state->owner->so_lock);
003707c7 2457 /* Calculate the change in open mode */
e7616923 2458 if (state->n_rdwr == 0) {
003707c7 2459 if (state->n_rdonly == 0) {
88069f77
TM		 2460 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2461 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2462 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2463 }
2464 if (state->n_wronly == 0) {
88069f77
TM		 2465 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2466 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2467 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2468 }
e7616923 2469 }
5d422301
TM		 2470 if (!nfs4_valid_open_stateid(state))
2471 call_close = 0;
4cecb76f 2472 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2473
2474 if (!call_close) {
963d8fe5 2475 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2476 goto out_no_action;
9512135d 2477 }
88069f77 2478
f7e8917a 2479 if (calldata->arg.fmode == 0) {
88069f77 2480 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2481 if (calldata->roc &&
b9536ad5
AA		 2482 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2483 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2484 goto out_wait;
b9536ad5 2485 }
f7e8917a 2486 }
88069f77 2487
516a6af6 2488 nfs_fattr_init(calldata->res.fattr);
26e976a8 2489 calldata->timestamp = jiffies;
7fdab069 2490 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2491 &calldata->arg.seq_args,
2492 &calldata->res.seq_res,
2240a9e2
TM		 2493 task) != 0)
2494 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2495 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2496 return;
2497out_no_action:
2498 task->tk_action = NULL;
2499out_wait:
2500 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2501}
2502
963d8fe5 2503static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2504 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2505 .rpc_call_done = nfs4_close_done,
2506 .rpc_release = nfs4_free_closedata,
2507};
2508
1da177e4
LT		 2509/*
2510 * It is possible for data to be read/written from a mem-mapped file
2511 * after the sys_close call (which hits the vfs layer as a flush).
2512 * This means that we can't safely call nfsv4 close on a file until
2513 * the inode is cleared. This in turn means that we are not good
2514 * NFSv4 citizens - we do not indicate to the server to update the file's
2515 * share state even when we are done with one of the three share
2516 * stateid's in the inode.
2517 *
2518 * NOTE: Caller must be holding the sp->so_owner semaphore!
2519 */
1f7977c1 2520int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2521{
4a35bd41 2522 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2523 struct nfs4_closedata *calldata;
b39e625b
TM		 2524 struct nfs4_state_owner *sp = state->owner;
2525 struct rpc_task *task;
5138fde0
TM		 2526 struct rpc_message msg = {
2527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2528 .rpc_cred = state->owner->so_cred,
2529 };
c970aa85
TM		 2530 struct rpc_task_setup task_setup_data = {
2531 .rpc_client = server->client,
5138fde0 2532 .rpc_message = &msg,
c970aa85 2533 .callback_ops = &nfs4_close_ops,
101070ca 2534 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2535 .flags = RPC_TASK_ASYNC,
2536 };
9512135d 2537 int status = -ENOMEM;
1da177e4 2538
8535b2be 2539 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2540 if (calldata == NULL)
9512135d 2541 goto out;
9d12b216 2542 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2543 calldata->inode = state->inode;
1da177e4 2544 calldata->state = state;
4a35bd41 2545 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2546 calldata->arg.stateid = &state->open_stateid;
1da177e4 2547 /* Serialization for the sequence id */
8535b2be 2548 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2549 if (calldata->arg.seqid == NULL)
2550 goto out_free_calldata;
dc0b027d 2551 calldata->arg.fmode = 0;
a65318bf 2552 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2553 calldata->res.fattr = &calldata->fattr;
c1d51931 2554 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2555 calldata->res.server = server;
1f7977c1 2556 calldata->roc = pnfs_roc(state->inode);
643168c2 2557 nfs_sb_active(calldata->inode->i_sb);
9512135d 2558
1174dd1f
TM		 2559 msg.rpc_argp = &calldata->arg;
2560 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2561 task_setup_data.callback_data = calldata;
2562 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2563 if (IS_ERR(task))
2564 return PTR_ERR(task);
a49c3c77
TM		 2565 status = 0;
2566 if (wait)
2567 status = rpc_wait_for_completion_task(task);
b39e625b 2568 rpc_put_task(task);
a49c3c77 2569 return status;
9512135d
TM		 2570out_free_calldata:
2571 kfree(calldata);
2572out:
b39e625b
TM		 2573 nfs4_put_open_state(state);
2574 nfs4_put_state_owner(sp);
9512135d 2575 return status;
1da177e4
LT		 2576}
2577
2b484297 2578static struct inode *
cd9a1c0e 2579nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2580{
1da177e4 2581 struct nfs4_state *state;
aa9c2669
DQ		 2582 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2583
2584 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2585
565277f6 2586 /* Protect against concurrent sillydeletes */
959d921f 2587 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2588
2589 nfs4_label_release_security(label);
2590
f46e0bd3
TM		 2591 if (IS_ERR(state))
2592 return ERR_CAST(state);
275bb307 2593 return state->inode;
1da177e4
LT		 2594}
2595
1185a552 2596static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2597{
2598 if (ctx->state == NULL)
2599 return;
2600 if (is_sync)
643168c2 2601 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2602 else
643168c2 2603 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2604}
1da177e4
LT		 2605
2606static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2607{
43652ad5
BH		 2608 struct nfs4_server_caps_arg args = {
2609 .fhandle = fhandle,
2610 };
1da177e4
LT		 2611 struct nfs4_server_caps_res res = {};
2612 struct rpc_message msg = {
2613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2614 .rpc_argp = &args,
1da177e4
LT		 2615 .rpc_resp = &res,
2616 };
2617 int status;
2618
7c513058 2619 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2620 if (status == 0) {
2621 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2622 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2623 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2624 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2625 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2626 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2627 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2628 server->caps |= NFS_CAP_ACLS;
2629 if (res.has_links != 0)
2630 server->caps |= NFS_CAP_HARDLINKS;
2631 if (res.has_symlinks != 0)
2632 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2633 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2634 server->caps |= NFS_CAP_FILEID;
2635 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2636 server->caps |= NFS_CAP_MODE;
2637 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2638 server->caps |= NFS_CAP_NLINK;
2639 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2640 server->caps |= NFS_CAP_OWNER;
2641 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2642 server->caps |= NFS_CAP_OWNER_GROUP;
2643 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2644 server->caps |= NFS_CAP_ATIME;
2645 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2646 server->caps |= NFS_CAP_CTIME;
2647 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2648 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2649#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2650 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2651 server->caps |= NFS_CAP_SECURITY_LABEL;
2652#endif
2653 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2654 sizeof(server->attr_bitmask));
62ab460c 2655
aa9c2669
DQ		 2656 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2657 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2658 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2659 }
a65318bf
TM		 2660 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2661 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2662 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2663 server->acl_bitmask = res.acl_bitmask;
264e6351 2664 server->fh_expire_type = res.fh_expire_type;
1da177e4 2665 }
cccef3b9 2666
1da177e4
LT		 2667 return status;
2668}
2669
55a97593 2670int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2671{
2672 struct nfs4_exception exception = { };
2673 int err;
2674 do {
2675 err = nfs4_handle_exception(server,
2676 _nfs4_server_capabilities(server, fhandle),
2677 &exception);
2678 } while (exception.retry);
2679 return err;
2680}
2681
2682static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2683 struct nfs_fsinfo *info)
2684{
aa9c2669 2685 u32 bitmask[3];
1da177e4 2686 struct nfs4_lookup_root_arg args = {
aa9c2669 2687 .bitmask = bitmask,
1da177e4
LT		 2688 };
2689 struct nfs4_lookup_res res = {
2690 .server = server,
0e574af1 2691 .fattr = info->fattr,
1da177e4
LT		 2692 .fh = fhandle,
2693 };
2694 struct rpc_message msg = {
2695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2696 .rpc_argp = &args,
2697 .rpc_resp = &res,
2698 };
008f55d0 2699
aa9c2669
DQ		 2700 bitmask[0] = nfs4_fattr_bitmap[0];
2701 bitmask[1] = nfs4_fattr_bitmap[1];
2702 /*
2703 * Process the label in the upcoming getfattr
2704 */
2705 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2706
0e574af1 2707 nfs_fattr_init(info->fattr);
7c513058 2708 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2709}
2710
2711static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2712 struct nfs_fsinfo *info)
2713{
2714 struct nfs4_exception exception = { };
2715 int err;
2716 do {
fb8a5ba8 2717 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2718 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2719 switch (err) {
2720 case 0:
2721 case -NFS4ERR_WRONGSEC:
05e9cfb4 2722 goto out;
fb8a5ba8
BS		 2723 default:
2724 err = nfs4_handle_exception(server, err, &exception);
2725 }
1da177e4 2726 } while (exception.retry);
05e9cfb4 2727out:
1da177e4
LT		 2728 return err;
2729}
2730
8f70e95f
BS		 2731static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2732 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2733{
c2190661
TM		 2734 struct rpc_auth_create_args auth_args = {
2735 .pseudoflavor = flavor,
2736 };
8f70e95f
BS		 2737 struct rpc_auth *auth;
2738 int ret;
2739
c2190661 2740 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2741 if (IS_ERR(auth)) {
75bc8821 2742 ret = -EACCES;
8f70e95f
BS		 2743 goto out;
2744 }
2745 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2746out:
2747 return ret;
2748}
2749
9a744ba3
CL		 2750/*
2751 * Retry pseudoroot lookup with various security flavors. We do this when:
2752 *
2753 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2754 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2755 *
2756 * Returns zero on success, or a negative NFS4ERR value, or a
2757 * negative errno value.
2758 */
801a16dc 2759static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2760 struct nfs_fsinfo *info)
1da177e4 2761{
9a744ba3
CL		 2762 /* Per 3530bis 15.33.5 */
2763 static const rpc_authflavor_t flav_array[] = {
2764 RPC_AUTH_GSS_KRB5P,
2765 RPC_AUTH_GSS_KRB5I,
2766 RPC_AUTH_GSS_KRB5,
c4eafe11 2767 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2768 RPC_AUTH_NULL,
2769 };
2770 int status = -EPERM;
2771 size_t i;
6a1a1e34 2772
9a744ba3 2773 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2774 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2775 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2776 continue;
2777 break;
8f70e95f 2778 }
9a744ba3 2779
fb8a5ba8
BS		 2780 /*
2781 * -EACCESS could mean that the user doesn't have correct permissions
2782 * to access the mount. It could also mean that we tried to mount
2783 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2784 * existing mount programs don't handle -EACCES very well so it should
2785 * be mapped to -EPERM instead.
2786 */
2787 if (status == -EACCES)
2788 status = -EPERM;
801a16dc
BS		 2789 return status;
2790}
2791
2ed4b95b
CL		 2792static int nfs4_do_find_root_sec(struct nfs_server *server,
2793 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2794{
2795 int mv = server->nfs_client->cl_minorversion;
2796 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2797}
2798
2799/**
2800 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2801 * @server: initialized nfs_server handle
2802 * @fhandle: we fill in the pseudo-fs root file handle
2803 * @info: we fill in an FSINFO struct
2804 *
2805 * Returns zero on success, or a negative errno.
801a16dc 2806 */
3028eb2b
BS		 2807int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2808 struct nfs_fsinfo *info)
801a16dc 2809{
2ed4b95b
CL		 2810 int status;
2811
2812 status = nfs4_lookup_root(server, fhandle, info);
2813 if ((status == -NFS4ERR_WRONGSEC) &&
2814 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2815 status = nfs4_do_find_root_sec(server, fhandle, info);
2816
1da177e4
LT		 2817 if (status == 0)
2818 status = nfs4_server_capabilities(server, fhandle);
2819 if (status == 0)
2820 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2821
c12e87f4 2822 return nfs4_map_errors(status);
1da177e4
LT		 2823}
2824
bae36241
BS		 2825static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2826 struct nfs_fsinfo *info)
2827{
2828 int error;
2829 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2830 struct nfs4_label *label = NULL;
bae36241
BS		 2831
2832 error = nfs4_server_capabilities(server, mntfh);
2833 if (error < 0) {
2834 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2835 return error;
2836 }
2837
14c43f76
DQ		 2838 label = nfs4_label_alloc(server, GFP_KERNEL);
2839 if (IS_ERR(label))
2840 return PTR_ERR(label);
2841
1775fd3e 2842 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2843 if (error < 0) {
2844 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2845 goto err_free_label;
bae36241
BS		 2846 }
2847
2848 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2849 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2850 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2851
14c43f76
DQ		 2852err_free_label:
2853 nfs4_label_free(label);
2854
bae36241
BS		 2855 return error;
2856}
2857
6b97fd3d
MN		 2858/*
2859 * Get locations and (maybe) other attributes of a referral.
2860 * Note that we'll actually follow the referral later when
2861 * we detect fsid mismatch in inode revalidation
2862 */
f05d147f
BS		 2863static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2864 const struct qstr *name, struct nfs_fattr *fattr,
2865 struct nfs_fh *fhandle)
6b97fd3d
MN		 2866{
2867 int status = -ENOMEM;
2868 struct page *page = NULL;
2869 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2870
2871 page = alloc_page(GFP_KERNEL);
2872 if (page == NULL)
2873 goto out;
2874 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2875 if (locations == NULL)
2876 goto out;
2877
f05d147f 2878 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2879 if (status != 0)
2880 goto out;
2881 /* Make sure server returned a different fsid for the referral */
2882 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2883 dprintk("%s: server did not return a different fsid for"
2884 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2885 status = -EIO;
2886 goto out;
2887 }
533eb461
AA		 2888 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2889 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2890
533eb461 2891 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2892 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2893 memset(fhandle, 0, sizeof(struct nfs_fh));
2894out:
2895 if (page)
2896 __free_page(page);
5d7ca35a 2897 kfree(locations);
6b97fd3d
MN		 2898 return status;
2899}
2900
1775fd3e
DQ		 2901static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2902 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2903{
2904 struct nfs4_getattr_arg args = {
2905 .fh = fhandle,
2906 .bitmask = server->attr_bitmask,
2907 };
2908 struct nfs4_getattr_res res = {
2909 .fattr = fattr,
1775fd3e 2910 .label = label,
1da177e4
LT		 2911 .server = server,
2912 };
2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2915 .rpc_argp = &args,
2916 .rpc_resp = &res,
2917 };
aa9c2669
DQ		 2918
2919 args.bitmask = nfs4_bitmask(server, label);
2920
0e574af1 2921 nfs_fattr_init(fattr);
7c513058 2922 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2923}
2924
1775fd3e
DQ		 2925static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2926 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2927{
2928 struct nfs4_exception exception = { };
2929 int err;
2930 do {
b5f875a9
TM		 2931 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
2932 trace_nfs4_getattr(server, fhandle, fattr, err);
2933 err = nfs4_handle_exception(server, err,
1da177e4
LT		 2934 &exception);
2935 } while (exception.retry);
2936 return err;
2937}
2938
2939/*
2940 * The file is not closed if it is opened due to the a request to change
2941 * the size of the file. The open call will not be needed once the
2942 * VFS layer lookup-intents are implemented.
2943 *
2944 * Close is called when the inode is destroyed.
2945 * If we haven't opened the file for O_WRONLY, we
2946 * need to in the size_change case to obtain a stateid.
2947 *
2948 * Got race?
2949 * Because OPEN is always done by name in nfsv4, it is
2950 * possible that we opened a different file by the same
2951 * name. We can recognize this race condition, but we
2952 * can't do anything about it besides returning an error.
2953 *
2954 * This will be fixed with VFS changes (lookup-intent).
2955 */
2956static int
2957nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2958 struct iattr *sattr)
2959{
08e9eac4 2960 struct inode *inode = dentry->d_inode;
659bfcd6 2961 struct rpc_cred *cred = NULL;
d530838b 2962 struct nfs4_state *state = NULL;
14c43f76 2963 struct nfs4_label *label = NULL;
1da177e4
LT		 2964 int status;
2965
8a1636c4 2966 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2967 pnfs_commit_and_return_layout(inode);
8a1636c4 2968
0e574af1 2969 nfs_fattr_init(fattr);
1da177e4 2970
2669940d
AA		 2971 /* Deal with open(O_TRUNC) */
2972 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 2973 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 2974
2975 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 2976 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 2977 return 0;
2978
d530838b 2979 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2980 if (sattr->ia_valid & ATTR_FILE) {
2981 struct nfs_open_context *ctx;
2982
2983 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2984 if (ctx) {
2985 cred = ctx->cred;
2986 state = ctx->state;
2987 }
659bfcd6 2988 }
08e9eac4 2989
14c43f76
DQ		 2990 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
2991 if (IS_ERR(label))
2992 return PTR_ERR(label);
2993
2994 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 2995 if (status == 0) {
65e4308d 2996 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 2997 nfs_setsecurity(inode, fattr, label);
2998 }
14c43f76 2999 nfs4_label_free(label);
1da177e4
LT		 3000 return status;
3001}
3002
0c2e53f1
TM		 3003static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3004 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3005 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3006{
0c2e53f1 3007 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3008 int status;
3009 struct nfs4_lookup_arg args = {
3010 .bitmask = server->attr_bitmask,
0c2e53f1 3011 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3012 .name = name,
3013 };
3014 struct nfs4_lookup_res res = {
3015 .server = server,
3016 .fattr = fattr,
aa9c2669 3017 .label = label,
2b3de441
DH		 3018 .fh = fhandle,
3019 };
3020 struct rpc_message msg = {
3021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3022 .rpc_argp = &args,
3023 .rpc_resp = &res,
3024 };
3025
aa9c2669
DQ		 3026 args.bitmask = nfs4_bitmask(server, label);
3027
2b3de441
DH		 3028 nfs_fattr_init(fattr);
3029
1da177e4 3030 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3031 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3032 dprintk("NFS reply lookup: %d\n", status);
3033 return status;
3034}
3035
72de53ec 3036static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3037{
7ebb9315 3038 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3039 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3040 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3041 fattr->nlink = 2;
3042}
3043
72de53ec
BS		 3044static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3045 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3046 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3047{
3048 struct nfs4_exception exception = { };
72de53ec 3049 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3050 int err;
3051 do {
1775fd3e 3052 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3053 trace_nfs4_lookup(dir, name, err);
72de53ec 3054 switch (err) {
08ef7bd3 3055 case -NFS4ERR_BADNAME:
72de53ec
BS		 3056 err = -ENOENT;
3057 goto out;
0c2e53f1 3058 case -NFS4ERR_MOVED:
f05d147f 3059 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3060 goto out;
0c2e53f1 3061 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3062 err = -EPERM;
3063 if (client != *clnt)
3064 goto out;
3065
3066 client = nfs4_create_sec_client(client, dir, name);
3067 if (IS_ERR(client))
3068 return PTR_ERR(client);
3069
3070 exception.retry = 1;
3071 break;
3072 default:
3073 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3074 }
1da177e4 3075 } while (exception.retry);
72de53ec
BS		 3076
3077out:
3078 if (err == 0)
3079 *clnt = client;
3080 else if (client != *clnt)
3081 rpc_shutdown_client(client);
3082
1da177e4
LT		 3083 return err;
3084}
3085
80a16b21 3086static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3087 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3088 struct nfs4_label *label)
72de53ec
BS		 3089{
3090 int status;
3091 struct rpc_clnt *client = NFS_CLIENT(dir);
3092
1775fd3e 3093 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3094 if (client != NFS_CLIENT(dir)) {
3095 rpc_shutdown_client(client);
3096 nfs_fixup_secinfo_attributes(fattr);
3097 }
3098 return status;
3099}
3100
f05d147f
BS		 3101struct rpc_clnt *
3102nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3103 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3104{
3105 int status;
3106 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
3107
1775fd3e 3108 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
f05d147f
BS		 3109 if (status < 0) {
3110 rpc_shutdown_client(client);
3111 return ERR_PTR(status);
3112 }
3113 return client;
3114}
3115
1da177e4
LT		 3116static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3117{
76b32999 3118 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3119 struct nfs4_accessargs args = {
3120 .fh = NFS_FH(inode),
a4980e78 3121 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3122 };
3123 struct nfs4_accessres res = {
3124 .server = server,
1da177e4 3125 };
1da177e4
LT		 3126 struct rpc_message msg = {
3127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3128 .rpc_argp = &args,
3129 .rpc_resp = &res,
3130 .rpc_cred = entry->cred,
3131 };
3132 int mode = entry->mask;
aa9c2669 3133 int status = 0;
1da177e4
LT		 3134
3135 /*
3136 * Determine which access bits we want to ask for...
3137 */
3138 if (mode & MAY_READ)
3139 args.access |= NFS4_ACCESS_READ;
3140 if (S_ISDIR(inode->i_mode)) {
3141 if (mode & MAY_WRITE)
3142 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3143 if (mode & MAY_EXEC)
3144 args.access |= NFS4_ACCESS_LOOKUP;
3145 } else {
3146 if (mode & MAY_WRITE)
3147 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3148 if (mode & MAY_EXEC)
3149 args.access |= NFS4_ACCESS_EXECUTE;
3150 }
c407d41a
TM		 3151
3152 res.fattr = nfs_alloc_fattr();
3153 if (res.fattr == NULL)
3154 return -ENOMEM;
3155
7c513058 3156 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3157 if (!status) {
6168f62c 3158 nfs_access_set_mask(entry, res.access);
c407d41a 3159 nfs_refresh_inode(inode, res.fattr);
1da177e4 3160 }
c407d41a 3161 nfs_free_fattr(res.fattr);
1da177e4
LT		 3162 return status;
3163}
3164
3165static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3166{
3167 struct nfs4_exception exception = { };
3168 int err;
3169 do {
c1578b76
TM		 3170 err = _nfs4_proc_access(inode, entry);
3171 trace_nfs4_access(inode, err);
3172 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3173 &exception);
3174 } while (exception.retry);
3175 return err;
3176}
3177
3178/*
3179 * TODO: For the time being, we don't try to get any attributes
3180 * along with any of the zero-copy operations READ, READDIR,
3181 * READLINK, WRITE.
3182 *
3183 * In the case of the first three, we want to put the GETATTR
3184 * after the read-type operation -- this is because it is hard
3185 * to predict the length of a GETATTR response in v4, and thus
3186 * align the READ data correctly. This means that the GETATTR
3187 * may end up partially falling into the page cache, and we should
3188 * shift it into the 'tail' of the xdr_buf before processing.
3189 * To do this efficiently, we need to know the total length
3190 * of data received, which doesn't seem to be available outside
3191 * of the RPC layer.
3192 *
3193 * In the case of WRITE, we also want to put the GETATTR after
3194 * the operation -- in this case because we want to make sure
140150db 3195 * we get the post-operation mtime and size.
1da177e4
LT		 3196 *
3197 * Both of these changes to the XDR layer would in fact be quite
3198 * minor, but I decided to leave them for a subsequent patch.
3199 */
3200static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3201 unsigned int pgbase, unsigned int pglen)
3202{
3203 struct nfs4_readlink args = {
3204 .fh = NFS_FH(inode),
3205 .pgbase = pgbase,
3206 .pglen = pglen,
3207 .pages = &page,
3208 };
f50c7000 3209 struct nfs4_readlink_res res;
1da177e4
LT		 3210 struct rpc_message msg = {
3211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3212 .rpc_argp = &args,
f50c7000 3213 .rpc_resp = &res,
1da177e4
LT		 3214 };
3215
7c513058 3216 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3217}
3218
3219static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3220 unsigned int pgbase, unsigned int pglen)
3221{
3222 struct nfs4_exception exception = { };
3223 int err;
3224 do {
c1578b76
TM		 3225 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3226 trace_nfs4_readlink(inode, err);
3227 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3228 &exception);
3229 } while (exception.retry);
3230 return err;
3231}
3232
1da177e4 3233/*
8867fe58 3234 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3235 */
1da177e4
LT		 3236static int
3237nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3238 int flags)
1da177e4 3239{
aa9c2669 3240 struct nfs4_label l, *ilabel = NULL;
8867fe58 3241 struct nfs_open_context *ctx;
1da177e4 3242 struct nfs4_state *state;
1da177e4
LT		 3243 int status = 0;
3244
8867fe58
MS		 3245 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3246 if (IS_ERR(ctx))
3247 return PTR_ERR(ctx);
3248
aa9c2669
DQ		 3249 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3250
a8a5da99 3251 sattr->ia_mode &= ~current_umask();
959d921f 3252 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3253 if (IS_ERR(state)) {
3254 status = PTR_ERR(state);
c0204fd2 3255 goto out;
1da177e4 3256 }
1da177e4 3257out:
aa9c2669 3258 nfs4_label_release_security(ilabel);
8867fe58 3259 put_nfs_open_context(ctx);
1da177e4
LT		 3260 return status;
3261}
3262
3263static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3264{
16e42959 3265 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3266 struct nfs_removeargs args = {
1da177e4 3267 .fh = NFS_FH(dir),
26fe5750 3268 .name = *name,
16e42959 3269 };
4fdc17b2 3270 struct nfs_removeres res = {
16e42959 3271 .server = server,
1da177e4 3272 };
1da177e4 3273 struct rpc_message msg = {
4fdc17b2
TM		 3274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3275 .rpc_argp = &args,
3276 .rpc_resp = &res,
1da177e4 3277 };
778d2817 3278 int status;
1da177e4 3279
7c513058 3280 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3281 if (status == 0)
16e42959 3282 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3283 return status;
3284}
3285
3286static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3287{
3288 struct nfs4_exception exception = { };
3289 int err;
3290 do {
078ea3df
TM		 3291 err = _nfs4_proc_remove(dir, name);
3292 trace_nfs4_remove(dir, name, err);
3293 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3294 &exception);
3295 } while (exception.retry);
3296 return err;
3297}
3298
e4eff1a6 3299static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3300{
e4eff1a6
TM		 3301 struct nfs_server *server = NFS_SERVER(dir);
3302 struct nfs_removeargs *args = msg->rpc_argp;
3303 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3304
e4eff1a6 3305 res->server = server;
1da177e4 3306 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3307 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3308
3309 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3310}
3311
34e137cc
BS		 3312static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3313{
d9afbd1b
TM		 3314 nfs4_setup_sequence(NFS_SERVER(data->dir),
3315 &data->args.seq_args,
3316 &data->res.seq_res,
3317 task);
1da177e4
LT		 3318}
3319
e4eff1a6 3320static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3321{
078ea3df
TM		 3322 struct nfs_unlinkdata *data = task->tk_calldata;
3323 struct nfs_removeres *res = &data->res;
e4eff1a6 3324
14516c3a
TM		 3325 if (!nfs4_sequence_done(task, &res->seq_res))
3326 return 0;
9e33bed5 3327 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3328 return 0;
3329 update_changeattr(dir, &res->cinfo);
e4eff1a6 3330 return 1;
1da177e4
LT		 3331}
3332
d3d4152a
JL		 3333static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3334{
3335 struct nfs_server *server = NFS_SERVER(dir);
3336 struct nfs_renameargs *arg = msg->rpc_argp;
3337 struct nfs_renameres *res = msg->rpc_resp;
3338
3339 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3340 res->server = server;
9d12b216 3341 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3342}
3343
c6bfa1a1
BS		 3344static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3345{
d9afbd1b
TM		 3346 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3347 &data->args.seq_args,
3348 &data->res.seq_res,
3349 task);
d3d4152a
JL		 3350}
3351
3352static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3353 struct inode *new_dir)
3354{
fbc6f7c2
TM		 3355 struct nfs_renamedata *data = task->tk_calldata;
3356 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3357
3358 if (!nfs4_sequence_done(task, &res->seq_res))
3359 return 0;
3360 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3361 return 0;
3362
3363 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3364 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3365 return 1;
3366}
3367
1da177e4
LT		 3368static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3369 struct inode *new_dir, struct qstr *new_name)
3370{
6caf2c82 3371 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3372 struct nfs_renameargs arg = {
1da177e4
LT		 3373 .old_dir = NFS_FH(old_dir),
3374 .new_dir = NFS_FH(new_dir),
3375 .old_name = old_name,
3376 .new_name = new_name,
6caf2c82 3377 };
e8582a8b 3378 struct nfs_renameres res = {
6caf2c82 3379 .server = server,
1da177e4 3380 };
1da177e4
LT		 3381 struct rpc_message msg = {
3382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3383 .rpc_argp = &arg,
3384 .rpc_resp = &res,
3385 };
011fff72 3386 int status = -ENOMEM;
14c43f76 3387
7c513058 3388 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3389 if (!status) {
3390 update_changeattr(old_dir, &res.old_cinfo);
3391 update_changeattr(new_dir, &res.new_cinfo);
3392 }
3393 return status;
3394}
3395
3396static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3397 struct inode *new_dir, struct qstr *new_name)
3398{
3399 struct nfs4_exception exception = { };
3400 int err;
3401 do {
fbc6f7c2
TM		 3402 err = _nfs4_proc_rename(old_dir, old_name,
3403 new_dir, new_name);
3404 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3405 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3406 &exception);
3407 } while (exception.retry);
3408 return err;
3409}
3410
3411static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3412{
91ba2eee 3413 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3414 struct nfs4_link_arg arg = {
3415 .fh = NFS_FH(inode),
3416 .dir_fh = NFS_FH(dir),
3417 .name = name,
91ba2eee
TM		 3418 .bitmask = server->attr_bitmask,
3419 };
91ba2eee
TM		 3420 struct nfs4_link_res res = {
3421 .server = server,
1775fd3e 3422 .label = NULL,
1da177e4 3423 };
1da177e4
LT		 3424 struct rpc_message msg = {
3425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3426 .rpc_argp = &arg,
91ba2eee 3427 .rpc_resp = &res,
1da177e4 3428 };
136f2627
TM		 3429 int status = -ENOMEM;
3430
3431 res.fattr = nfs_alloc_fattr();
778d2817 3432 if (res.fattr == NULL)
136f2627 3433 goto out;
1da177e4 3434
14c43f76
DQ		 3435 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3436 if (IS_ERR(res.label)) {
3437 status = PTR_ERR(res.label);
3438 goto out;
3439 }
aa9c2669 3440 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3441
7c513058 3442 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3443 if (!status) {
3444 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3445 status = nfs_post_op_update_inode(inode, res.fattr);
3446 if (!status)
3447 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3448 }
14c43f76
DQ		 3449
3450
3451 nfs4_label_free(res.label);
3452
136f2627 3453out:
136f2627 3454 nfs_free_fattr(res.fattr);
1da177e4
LT		 3455 return status;
3456}
3457
3458static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3459{
3460 struct nfs4_exception exception = { };
3461 int err;
3462 do {
3463 err = nfs4_handle_exception(NFS_SERVER(inode),
3464 _nfs4_proc_link(inode, dir, name),
3465 &exception);
3466 } while (exception.retry);
3467 return err;
3468}
3469
57dc9a57
TM		 3470struct nfs4_createdata {
3471 struct rpc_message msg;
3472 struct nfs4_create_arg arg;
3473 struct nfs4_create_res res;
3474 struct nfs_fh fh;
3475 struct nfs_fattr fattr;
1775fd3e 3476 struct nfs4_label *label;
57dc9a57
TM		 3477};
3478
3479static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3480 struct qstr *name, struct iattr *sattr, u32 ftype)
3481{
3482 struct nfs4_createdata *data;
3483
3484 data = kzalloc(sizeof(*data), GFP_KERNEL);
3485 if (data != NULL) {
3486 struct nfs_server *server = NFS_SERVER(dir);
3487
14c43f76
DQ		 3488 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3489 if (IS_ERR(data->label))
3490 goto out_free;
3491
57dc9a57
TM		 3492 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3493 data->msg.rpc_argp = &data->arg;
3494 data->msg.rpc_resp = &data->res;
3495 data->arg.dir_fh = NFS_FH(dir);
3496 data->arg.server = server;
3497 data->arg.name = name;
3498 data->arg.attrs = sattr;
3499 data->arg.ftype = ftype;
aa9c2669 3500 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3501 data->res.server = server;
3502 data->res.fh = &data->fh;
3503 data->res.fattr = &data->fattr;
1775fd3e 3504 data->res.label = data->label;
57dc9a57 3505 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3506 }
3507 return data;
14c43f76
DQ		 3508out_free:
3509 kfree(data);
3510 return NULL;
57dc9a57
TM		 3511}
3512
3513static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3514{
7c513058 3515 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3516 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3517 if (status == 0) {
3518 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3519 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3520 }
3521 return status;
3522}
3523
3524static void nfs4_free_createdata(struct nfs4_createdata *data)
3525{
14c43f76 3526 nfs4_label_free(data->label);
57dc9a57
TM		 3527 kfree(data);
3528}
3529
4f390c15 3530static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3531 struct page *page, unsigned int len, struct iattr *sattr,
3532 struct nfs4_label *label)
1da177e4 3533{
57dc9a57
TM		 3534 struct nfs4_createdata *data;
3535 int status = -ENAMETOOLONG;
1da177e4 3536
94a6d753 3537 if (len > NFS4_MAXPATHLEN)
57dc9a57 3538 goto out;
4f390c15 3539
57dc9a57
TM		 3540 status = -ENOMEM;
3541 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3542 if (data == NULL)
3543 goto out;
3544
3545 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3546 data->arg.u.symlink.pages = &page;
3547 data->arg.u.symlink.len = len;
1775fd3e 3548 data->arg.label = label;
1da177e4 3549
57dc9a57
TM		 3550 status = nfs4_do_create(dir, dentry, data);
3551
3552 nfs4_free_createdata(data);
3553out:
1da177e4
LT		 3554 return status;
3555}
3556
4f390c15 3557static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3558 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3559{
3560 struct nfs4_exception exception = { };
aa9c2669 3561 struct nfs4_label l, *label = NULL;
1da177e4 3562 int err;
aa9c2669
DQ		 3563
3564 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3565
1da177e4 3566 do {
078ea3df
TM		 3567 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3568 trace_nfs4_symlink(dir, &dentry->d_name, err);
3569 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3570 &exception);
3571 } while (exception.retry);
aa9c2669
DQ		 3572
3573 nfs4_label_release_security(label);
1da177e4
LT		 3574 return err;
3575}
3576
3577static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3578 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3579{
57dc9a57
TM		 3580 struct nfs4_createdata *data;
3581 int status = -ENOMEM;
1da177e4 3582
57dc9a57
TM		 3583 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3584 if (data == NULL)
3585 goto out;
3586
1775fd3e 3587 data->arg.label = label;
57dc9a57
TM		 3588 status = nfs4_do_create(dir, dentry, data);
3589
3590 nfs4_free_createdata(data);
3591out:
1da177e4
LT		 3592 return status;
3593}
3594
3595static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3596 struct iattr *sattr)
3597{
3598 struct nfs4_exception exception = { };
aa9c2669 3599 struct nfs4_label l, *label = NULL;
1da177e4 3600 int err;
a8a5da99 3601
aa9c2669
DQ		 3602 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3603
a8a5da99 3604 sattr->ia_mode &= ~current_umask();
1da177e4 3605 do {
078ea3df
TM		 3606 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3607 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3608 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3609 &exception);
3610 } while (exception.retry);
aa9c2669
DQ		 3611 nfs4_label_release_security(label);
3612
1da177e4
LT		 3613 return err;
3614}
3615
3616static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3617 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3618{
3619 struct inode *dir = dentry->d_inode;
3620 struct nfs4_readdir_arg args = {
3621 .fh = NFS_FH(dir),
56e4ebf8 3622 .pages = pages,
1da177e4
LT		 3623 .pgbase = 0,
3624 .count = count,
96d25e53 3625 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3626 .plus = plus,
1da177e4
LT		 3627 };
3628 struct nfs4_readdir_res res;
3629 struct rpc_message msg = {
3630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3631 .rpc_argp = &args,
3632 .rpc_resp = &res,
3633 .rpc_cred = cred,
3634 };
3635 int status;
3636
3110ff80 3637 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3638 dentry->d_parent->d_name.name,
3639 dentry->d_name.name,
3640 (unsigned long long)cookie);
c3f52af3 3641 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3642 res.pgbase = args.pgbase;
7c513058 3643 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3644 if (status >= 0) {
c3f52af3 3645 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3646 status += args.pgbase;
3647 }
c4812998
TM		 3648
3649 nfs_invalidate_atime(dir);
3650
3110ff80 3651 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3652 return status;
3653}
3654
3655static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3656 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3657{
3658 struct nfs4_exception exception = { };
3659 int err;
3660 do {
c1578b76
TM		 3661 err = _nfs4_proc_readdir(dentry, cred, cookie,
3662 pages, count, plus);
3663 trace_nfs4_readdir(dentry->d_inode, err);
3664 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3665 &exception);
3666 } while (exception.retry);
3667 return err;
3668}
3669
3670static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3671 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3672{
57dc9a57
TM		 3673 struct nfs4_createdata *data;
3674 int mode = sattr->ia_mode;
3675 int status = -ENOMEM;
1da177e4 3676
57dc9a57
TM		 3677 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3678 if (data == NULL)
3679 goto out;
3680
1da177e4 3681 if (S_ISFIFO(mode))
57dc9a57 3682 data->arg.ftype = NF4FIFO;
1da177e4 3683 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3684 data->arg.ftype = NF4BLK;
3685 data->arg.u.device.specdata1 = MAJOR(rdev);
3686 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3687 }
3688 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3689 data->arg.ftype = NF4CHR;
3690 data->arg.u.device.specdata1 = MAJOR(rdev);
3691 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3692 } else if (!S_ISSOCK(mode)) {
3693 status = -EINVAL;
3694 goto out_free;
1da177e4 3695 }
1775fd3e 3696
aa9c2669 3697 data->arg.label = label;
57dc9a57 3698 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3699out_free:
57dc9a57
TM		 3700 nfs4_free_createdata(data);
3701out:
1da177e4
LT		 3702 return status;
3703}
3704
3705static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3706 struct iattr *sattr, dev_t rdev)
3707{
3708 struct nfs4_exception exception = { };
aa9c2669 3709 struct nfs4_label l, *label = NULL;
1da177e4 3710 int err;
a8a5da99 3711
aa9c2669
DQ		 3712 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3713
a8a5da99 3714 sattr->ia_mode &= ~current_umask();
1da177e4 3715 do {
078ea3df
TM		 3716 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3717 trace_nfs4_mknod(dir, &dentry->d_name, err);
3718 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3719 &exception);
3720 } while (exception.retry);
aa9c2669
DQ		 3721
3722 nfs4_label_release_security(label);
3723
1da177e4
LT		 3724 return err;
3725}
3726
3727static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3728 struct nfs_fsstat *fsstat)
3729{
3730 struct nfs4_statfs_arg args = {
3731 .fh = fhandle,
3732 .bitmask = server->attr_bitmask,
3733 };
24ad148a
BH		 3734 struct nfs4_statfs_res res = {
3735 .fsstat = fsstat,
3736 };
1da177e4
LT		 3737 struct rpc_message msg = {
3738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3739 .rpc_argp = &args,
24ad148a 3740 .rpc_resp = &res,
1da177e4
LT		 3741 };
3742
0e574af1 3743 nfs_fattr_init(fsstat->fattr);
7c513058 3744 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3745}
3746
3747static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3748{
3749 struct nfs4_exception exception = { };
3750 int err;
3751 do {
3752 err = nfs4_handle_exception(server,
3753 _nfs4_proc_statfs(server, fhandle, fsstat),
3754 &exception);
3755 } while (exception.retry);
3756 return err;
3757}
3758
3759static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3760 struct nfs_fsinfo *fsinfo)
3761{
3762 struct nfs4_fsinfo_arg args = {
3763 .fh = fhandle,
3764 .bitmask = server->attr_bitmask,
3765 };
3dda5e43
BH		 3766 struct nfs4_fsinfo_res res = {
3767 .fsinfo = fsinfo,
3768 };
1da177e4
LT		 3769 struct rpc_message msg = {
3770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3771 .rpc_argp = &args,
3dda5e43 3772 .rpc_resp = &res,
1da177e4
LT		 3773 };
3774
7c513058 3775 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3776}
3777
3778static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3779{
3780 struct nfs4_exception exception = { };
83ca7f5a 3781 unsigned long now = jiffies;
1da177e4
LT		 3782 int err;
3783
3784 do {
83ca7f5a 3785 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3786 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3787 if (err == 0) {
3788 struct nfs_client *clp = server->nfs_client;
3789
3790 spin_lock(&clp->cl_lock);
3791 clp->cl_lease_time = fsinfo->lease_time * HZ;
3792 clp->cl_last_renewal = now;
3793 spin_unlock(&clp->cl_lock);
3794 break;
3795 }
3796 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3797 } while (exception.retry);
3798 return err;
3799}
3800
3801static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3802{
e38eb650
BS		 3803 int error;
3804
0e574af1 3805 nfs_fattr_init(fsinfo->fattr);
e38eb650 3806 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3807 if (error == 0) {
3808 /* block layout checks this! */
3809 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3810 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3811 }
e38eb650
BS		 3812
3813 return error;
1da177e4
LT		 3814}
3815
3816static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3817 struct nfs_pathconf *pathconf)
3818{
3819 struct nfs4_pathconf_arg args = {
3820 .fh = fhandle,
3821 .bitmask = server->attr_bitmask,
3822 };
d45b2989
BH		 3823 struct nfs4_pathconf_res res = {
3824 .pathconf = pathconf,
3825 };
1da177e4
LT		 3826 struct rpc_message msg = {
3827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3828 .rpc_argp = &args,
d45b2989 3829 .rpc_resp = &res,
1da177e4
LT		 3830 };
3831
3832 /* None of the pathconf attributes are mandatory to implement */
3833 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3834 memset(pathconf, 0, sizeof(*pathconf));
3835 return 0;
3836 }
3837
0e574af1 3838 nfs_fattr_init(pathconf->fattr);
7c513058 3839 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3840}
3841
3842static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3843 struct nfs_pathconf *pathconf)
3844{
3845 struct nfs4_exception exception = { };
3846 int err;
3847
3848 do {
3849 err = nfs4_handle_exception(server,
3850 _nfs4_proc_pathconf(server, fhandle, pathconf),
3851 &exception);
3852 } while (exception.retry);
3853 return err;
3854}
3855
5521abfd 3856int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3857 const struct nfs_open_context *ctx,
3858 const struct nfs_lock_context *l_ctx,
3859 fmode_t fmode)
3860{
3861 const struct nfs_lockowner *lockowner = NULL;
3862
3863 if (l_ctx != NULL)
3864 lockowner = &l_ctx->lockowner;
5521abfd 3865 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3866}
3867EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3868
5521abfd
TM		 3869static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3870 const struct nfs_open_context *ctx,
3871 const struct nfs_lock_context *l_ctx,
3872 fmode_t fmode)
3873{
3874 nfs4_stateid current_stateid;
3875
3876 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3877 return false;
3878 return nfs4_stateid_match(stateid, &current_stateid);
3879}
3880
3881static bool nfs4_error_stateid_expired(int err)
3882{
3883 switch (err) {
3884 case -NFS4ERR_DELEG_REVOKED:
3885 case -NFS4ERR_ADMIN_REVOKED:
3886 case -NFS4ERR_BAD_STATEID:
3887 case -NFS4ERR_STALE_STATEID:
3888 case -NFS4ERR_OLD_STATEID:
3889 case -NFS4ERR_OPENMODE:
3890 case -NFS4ERR_EXPIRED:
3891 return true;
3892 }
3893 return false;
3894}
3895
d20581aa
BH		 3896void __nfs4_read_done_cb(struct nfs_read_data *data)
3897{
cd841605 3898 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3899}
3900
cbdabc7f 3901static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3902{
cd841605 3903 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3904
cc668ab3 3905 trace_nfs4_read(data, task->tk_status);
9e33bed5 3906 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3907 rpc_restart_call_prepare(task);
ec06c096 3908 return -EAGAIN;
1da177e4 3909 }
8850df99 3910
d20581aa 3911 __nfs4_read_done_cb(data);
1da177e4 3912 if (task->tk_status > 0)
ec06c096
TM		 3913 renew_lease(server, data->timestamp);
3914 return 0;
1da177e4
LT		 3915}
3916
5521abfd
TM		 3917static bool nfs4_read_stateid_changed(struct rpc_task *task,
3918 struct nfs_readargs *args)
3919{
3920
3921 if (!nfs4_error_stateid_expired(task->tk_status) ||
3922 nfs4_stateid_is_current(&args->stateid,
3923 args->context,
3924 args->lock_context,
3925 FMODE_READ))
3926 return false;
3927 rpc_restart_call_prepare(task);
3928 return true;
3929}
3930
cbdabc7f
AA		 3931static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3932{
3933
3934 dprintk("--> %s\n", __func__);
3935
3936 if (!nfs4_sequence_done(task, &data->res.seq_res))
3937 return -EAGAIN;
5521abfd
TM		 3938 if (nfs4_read_stateid_changed(task, &data->args))
3939 return -EAGAIN;
d20581aa
BH		 3940 return data->read_done_cb ? data->read_done_cb(task, data) :
3941 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3942}
3943
bdc7f021 3944static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3945{
1da177e4 3946 data->timestamp = jiffies;
cbdabc7f 3947 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3948 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3949 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3950}
3951
ea7c3303
BS		 3952static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3953{
9b206149 3954 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3955 &data->args.seq_args,
3956 &data->res.seq_res,
9b206149
TM		 3957 task))
3958 return;
3959 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3960 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3961}
3962
b029bc9b 3963static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3964{
cd841605 3965 struct inode *inode = data->header->inode;
1da177e4 3966
cc668ab3 3967 trace_nfs4_write(data, task->tk_status);
9e33bed5 3968 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3969 rpc_restart_call_prepare(task);
788e7a89 3970 return -EAGAIN;
1da177e4 3971 }
4f9838c7 3972 if (task->tk_status >= 0) {
1da177e4 3973 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3974 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3975 }
788e7a89 3976 return 0;
1da177e4
LT		 3977}
3978
5521abfd
TM		 3979static bool nfs4_write_stateid_changed(struct rpc_task *task,
3980 struct nfs_writeargs *args)
3981{
3982
3983 if (!nfs4_error_stateid_expired(task->tk_status) ||
3984 nfs4_stateid_is_current(&args->stateid,
3985 args->context,
3986 args->lock_context,
3987 FMODE_WRITE))
3988 return false;
3989 rpc_restart_call_prepare(task);
3990 return true;
3991}
3992
b029bc9b
FI		 3993static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3994{
3995 if (!nfs4_sequence_done(task, &data->res.seq_res))
3996 return -EAGAIN;
5521abfd
TM		 3997 if (nfs4_write_stateid_changed(task, &data->args))
3998 return -EAGAIN;
d20581aa
BH		 3999 return data->write_done_cb ? data->write_done_cb(task, data) :
4000 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4001}
4002
5a37f851
TM		 4003static
4004bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4005{
5a37f851
TM		 4006 const struct nfs_pgio_header *hdr = data->header;
4007
4008 /* Don't request attributes for pNFS or O_DIRECT writes */
4009 if (data->ds_clp != NULL || hdr->dreq != NULL)
4010 return false;
4011 /* Otherwise, request attributes if and only if we don't hold
4012 * a delegation
4013 */
011e2a7f 4014 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4015}
a69aef14 4016
bdc7f021 4017static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4018{
cd841605 4019 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4020
5a37f851 4021 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4022 data->args.bitmask = NULL;
4023 data->res.fattr = NULL;
4024 } else
4025 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4026
b029bc9b
FI		 4027 if (!data->write_done_cb)
4028 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4029 data->res.server = server;
1da177e4
LT		 4030 data->timestamp = jiffies;
4031
bdc7f021 4032 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 4033 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4034}
4035
c6cb80d0
BS		 4036static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
4037{
9b206149 4038 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4039 &data->args.seq_args,
4040 &data->res.seq_res,
9b206149
TM		 4041 task))
4042 return;
4043 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4044 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 4045}
4046
0b7c0153 4047static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4048{
d9afbd1b
TM		 4049 nfs4_setup_sequence(NFS_SERVER(data->inode),
4050 &data->args.seq_args,
4051 &data->res.seq_res,
4052 task);
1da177e4
LT		 4053}
4054
0b7c0153 4055static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4056{
1da177e4 4057 struct inode *inode = data->inode;
14516c3a 4058
cc668ab3 4059 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4060 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4061 rpc_restart_call_prepare(task);
788e7a89 4062 return -EAGAIN;
1da177e4 4063 }
788e7a89 4064 return 0;
1da177e4
LT		 4065}
4066
0b7c0153 4067static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4068{
4069 if (!nfs4_sequence_done(task, &data->res.seq_res))
4070 return -EAGAIN;
0b7c0153 4071 return data->commit_done_cb(task, data);
5f452431
FI		 4072}
4073
0b7c0153 4074static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4075{
788e7a89 4076 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4077
0b7c0153
FI		 4078 if (data->commit_done_cb == NULL)
4079 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4080 data->res.server = server;
bdc7f021 4081 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 4082 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4083}
4084
9bc4e3ca
CL		 4085struct nfs4_renewdata {
4086 struct nfs_client *client;
4087 unsigned long timestamp;
4088};
4089
1da177e4
LT		 4090/*
4091 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4092 * standalone procedure for queueing an asynchronous RENEW.
4093 */
9bc4e3ca 4094static void nfs4_renew_release(void *calldata)
dc96aef9 4095{
9bc4e3ca
CL		 4096 struct nfs4_renewdata *data = calldata;
4097 struct nfs_client *clp = data->client;
dc96aef9 4098
0851de06
AB		 4099 if (atomic_read(&clp->cl_count) > 1)
4100 nfs4_schedule_state_renewal(clp);
4101 nfs_put_client(clp);
9bc4e3ca 4102 kfree(data);
dc96aef9
AB		 4103}
4104
9bc4e3ca 4105static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4106{
9bc4e3ca
CL		 4107 struct nfs4_renewdata *data = calldata;
4108 struct nfs_client *clp = data->client;
4109 unsigned long timestamp = data->timestamp;
1da177e4 4110
c6d01c6f 4111 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4112 if (task->tk_status < 0) {
95baa25c 4113 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4114 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4115 return;
4116 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4117 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4118 return;
4119 }
4120 nfs4_schedule_path_down_recovery(clp);
1da177e4 4121 }
452e9352 4122 do_renew_lease(clp, timestamp);
1da177e4
LT		 4123}
4124
963d8fe5
TM		 4125static const struct rpc_call_ops nfs4_renew_ops = {
4126 .rpc_call_done = nfs4_renew_done,
dc96aef9 4127 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4128};
4129
2f60ea6b 4130static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4131{
4132 struct rpc_message msg = {
4133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4134 .rpc_argp = clp,
b4454fe1 4135 .rpc_cred = cred,
1da177e4 4136 };
9bc4e3ca 4137 struct nfs4_renewdata *data;
1da177e4 4138
2f60ea6b
TM		 4139 if (renew_flags == 0)
4140 return 0;
0851de06
AB		 4141 if (!atomic_inc_not_zero(&clp->cl_count))
4142 return -EIO;
b569ad34 4143 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4144 if (data == NULL)
4145 return -ENOMEM;
4146 data->client = clp;
4147 data->timestamp = jiffies;
bc7a05ca 4148 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4149 &nfs4_renew_ops, data);
1da177e4
LT		 4150}
4151
8534d4ec 4152static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4153{
4154 struct rpc_message msg = {
4155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4156 .rpc_argp = clp,
b4454fe1 4157 .rpc_cred = cred,
1da177e4
LT		 4158 };
4159 unsigned long now = jiffies;
4160 int status;
4161
bc7a05ca 4162 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4163 if (status < 0)
4164 return status;
452e9352 4165 do_renew_lease(clp, now);
1da177e4
LT		 4166 return 0;
4167}
4168
aa1870af
BF		 4169static inline int nfs4_server_supports_acls(struct nfs_server *server)
4170{
4171 return (server->caps & NFS_CAP_ACLS)
4172 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4173 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4174}
4175
21f498c2
TM		 4176/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4177 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4178 * the stack.
4179 */
21f498c2 4180#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4181
e9e3d724
NH		 4182static int buf_to_pages_noslab(const void *buf, size_t buflen,
4183 struct page **pages, unsigned int *pgbase)
4184{
4185 struct page *newpage, **spages;
4186 int rc = 0;
4187 size_t len;
4188 spages = pages;
4189
4190 do {
21f498c2 4191 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4192 newpage = alloc_page(GFP_KERNEL);
4193
4194 if (newpage == NULL)
4195 goto unwind;
4196 memcpy(page_address(newpage), buf, len);
4197 buf += len;
4198 buflen -= len;
4199 *pages++ = newpage;
4200 rc++;
4201 } while (buflen != 0);
4202
4203 return rc;
4204
4205unwind:
4206 for(; rc > 0; rc--)
4207 __free_page(spages[rc-1]);
4208 return -ENOMEM;
4209}
4210
e50a1c2e
BF		 4211struct nfs4_cached_acl {
4212 int cached;
4213 size_t len;
3e9d4154 4214 char data[0];
e50a1c2e
BF		 4215};
4216
4217static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4218{
4219 struct nfs_inode *nfsi = NFS_I(inode);
4220
4221 spin_lock(&inode->i_lock);
4222 kfree(nfsi->nfs4_acl);
4223 nfsi->nfs4_acl = acl;
4224 spin_unlock(&inode->i_lock);
4225}
4226
4227static void nfs4_zap_acl_attr(struct inode *inode)
4228{
4229 nfs4_set_cached_acl(inode, NULL);
4230}
4231
4232static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4233{
4234 struct nfs_inode *nfsi = NFS_I(inode);
4235 struct nfs4_cached_acl *acl;
4236 int ret = -ENOENT;
4237
4238 spin_lock(&inode->i_lock);
4239 acl = nfsi->nfs4_acl;
4240 if (acl == NULL)
4241 goto out;
4242 if (buf == NULL) /* user is just asking for length */
4243 goto out_len;
4244 if (acl->cached == 0)
4245 goto out;
4246 ret = -ERANGE; /* see getxattr(2) man page */
4247 if (acl->len > buflen)
4248 goto out;
4249 memcpy(buf, acl->data, acl->len);
4250out_len:
4251 ret = acl->len;
4252out:
4253 spin_unlock(&inode->i_lock);
4254 return ret;
4255}
4256
5794d21e 4257static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4258{
4259 struct nfs4_cached_acl *acl;
b291f1b1 4260 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4261
1f1ea6c2 4262 if (buflen <= PAGE_SIZE) {
b291f1b1 4263 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4264 if (acl == NULL)
4265 goto out;
4266 acl->cached = 1;
5794d21e 4267 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4268 } else {
4269 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4270 if (acl == NULL)
4271 goto out;
4272 acl->cached = 0;
4273 }
4274 acl->len = acl_len;
4275out:
4276 nfs4_set_cached_acl(inode, acl);
4277}
4278
bf118a34
AA		 4279/*
4280 * The getxattr API returns the required buffer length when called with a
4281 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4282 * the required buf. On a NULL buf, we send a page of data to the server
4283 * guessing that the ACL request can be serviced by a page. If so, we cache
4284 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4285 * the cache. If not so, we throw away the page, and cache the required
4286 * length. The next getxattr call will then produce another round trip to
4287 * the server, this time with the input buf of the required size.
4288 */
16b4289c 4289static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4290{
bf118a34 4291 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4292 struct nfs_getaclargs args = {
4293 .fh = NFS_FH(inode),
4294 .acl_pages = pages,
4295 .acl_len = buflen,
4296 };
663c79b3
BH		 4297 struct nfs_getaclres res = {
4298 .acl_len = buflen,
4299 };
aa1870af
BF		 4300 struct rpc_message msg = {
4301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4302 .rpc_argp = &args,
663c79b3 4303 .rpc_resp = &res,
aa1870af 4304 };
21f498c2
TM		 4305 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4306 int ret = -ENOMEM, i;
aa1870af 4307
bf118a34
AA		 4308 /* As long as we're doing a round trip to the server anyway,
4309 * let's be prepared for a page of acl data. */
4310 if (npages == 0)
4311 npages = 1;
21f498c2
TM		 4312 if (npages > ARRAY_SIZE(pages))
4313 return -ERANGE;
5a006899 4314
bf118a34
AA		 4315 for (i = 0; i < npages; i++) {
4316 pages[i] = alloc_page(GFP_KERNEL);
4317 if (!pages[i])
4318 goto out_free;
e50a1c2e 4319 }
5a006899
SP		 4320
4321 /* for decoding across pages */
4322 res.acl_scratch = alloc_page(GFP_KERNEL);
4323 if (!res.acl_scratch)
4324 goto out_free;
4325
bf118a34
AA		 4326 args.acl_len = npages * PAGE_SIZE;
4327 args.acl_pgbase = 0;
5a006899 4328
de040bec 4329 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4330 __func__, buf, buflen, npages, args.acl_len);
4331 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4332 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4333 if (ret)
4334 goto out_free;
bf118a34 4335
1f1ea6c2
TM		 4336 /* Handle the case where the passed-in buffer is too short */
4337 if (res.acl_flags & NFS4_ACL_TRUNC) {
4338 /* Did the user only issue a request for the acl length? */
4339 if (buf == NULL)
4340 goto out_ok;
e50a1c2e 4341 ret = -ERANGE;
1f1ea6c2 4342 goto out_free;
e50a1c2e 4343 }
1f1ea6c2 4344 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4345 if (buf) {
4346 if (res.acl_len > buflen) {
4347 ret = -ERANGE;
4348 goto out_free;
4349 }
1f1ea6c2 4350 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4351 }
1f1ea6c2
TM		 4352out_ok:
4353 ret = res.acl_len;
e50a1c2e 4354out_free:
bf118a34
AA		 4355 for (i = 0; i < npages; i++)
4356 if (pages[i])
4357 __free_page(pages[i]);
331818f1
TM		 4358 if (res.acl_scratch)
4359 __free_page(res.acl_scratch);
aa1870af
BF		 4360 return ret;
4361}
4362
16b4289c
TM		 4363static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4364{
4365 struct nfs4_exception exception = { };
4366 ssize_t ret;
4367 do {
4368 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4369 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4370 if (ret >= 0)
4371 break;
4372 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4373 } while (exception.retry);
4374 return ret;
4375}
4376
e50a1c2e
BF		 4377static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4378{
4379 struct nfs_server *server = NFS_SERVER(inode);
4380 int ret;
4381
4382 if (!nfs4_server_supports_acls(server))
4383 return -EOPNOTSUPP;
4384 ret = nfs_revalidate_inode(server, inode);
4385 if (ret < 0)
4386 return ret;
08a22b39
AK		 4387 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4388 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4389 ret = nfs4_read_cached_acl(inode, buf, buflen);
4390 if (ret != -ENOENT)
bf118a34
AA		 4391 /* -ENOENT is returned if there is no ACL or if there is an ACL
4392 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4393 return ret;
4394 return nfs4_get_acl_uncached(inode, buf, buflen);
4395}
4396
16b4289c 4397static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4398{
4399 struct nfs_server *server = NFS_SERVER(inode);
4400 struct page *pages[NFS4ACL_MAXPAGES];
4401 struct nfs_setaclargs arg = {
4402 .fh = NFS_FH(inode),
4403 .acl_pages = pages,
4404 .acl_len = buflen,
4405 };
73c403a9 4406 struct nfs_setaclres res;
4b580ee3
BF		 4407 struct rpc_message msg = {
4408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4409 .rpc_argp = &arg,
73c403a9 4410 .rpc_resp = &res,
4b580ee3 4411 };
21f498c2 4412 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4413 int ret, i;
4b580ee3
BF		 4414
4415 if (!nfs4_server_supports_acls(server))
4416 return -EOPNOTSUPP;
21f498c2
TM		 4417 if (npages > ARRAY_SIZE(pages))
4418 return -ERANGE;
e9e3d724
NH		 4419 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4420 if (i < 0)
4421 return i;
57ec14c5 4422 nfs4_inode_return_delegation(inode);
7c513058 4423 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4424
4425 /*
4426 * Free each page after tx, so the only ref left is
4427 * held by the network stack
4428 */
4429 for (; i > 0; i--)
4430 put_page(pages[i-1]);
4431
08a22b39
AK		 4432 /*
4433 * Acl update can result in inode attribute update.
4434 * so mark the attribute cache invalid.
4435 */
4436 spin_lock(&inode->i_lock);
4437 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4438 spin_unlock(&inode->i_lock);
f41f7418
TM		 4439 nfs_access_zap_cache(inode);
4440 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4441 return ret;
4442}
4443
16b4289c
TM		 4444static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4445{
4446 struct nfs4_exception exception = { };
4447 int err;
4448 do {
c1578b76
TM		 4449 err = __nfs4_proc_set_acl(inode, buf, buflen);
4450 trace_nfs4_set_acl(inode, err);
4451 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4452 &exception);
4453 } while (exception.retry);
4454 return err;
4455}
4456
aa9c2669
DQ		 4457#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4458static int _nfs4_get_security_label(struct inode *inode, void *buf,
4459 size_t buflen)
4460{
4461 struct nfs_server *server = NFS_SERVER(inode);
4462 struct nfs_fattr fattr;
4463 struct nfs4_label label = {0, 0, buflen, buf};
4464
4465 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4466 struct nfs4_getattr_arg args = {
4467 .fh = NFS_FH(inode),
4468 .bitmask = bitmask,
4469 };
4470 struct nfs4_getattr_res res = {
4471 .fattr = &fattr,
4472 .label = &label,
4473 .server = server,
4474 };
4475 struct rpc_message msg = {
4476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4477 .rpc_argp = &args,
4478 .rpc_resp = &res,
4479 };
4480 int ret;
4481
4482 nfs_fattr_init(&fattr);
4483
4484 ret = rpc_call_sync(server->client, &msg, 0);
4485 if (ret)
4486 return ret;
4487 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4488 return -ENOENT;
4489 if (buflen < label.len)
4490 return -ERANGE;
4491 return 0;
4492}
4493
4494static int nfs4_get_security_label(struct inode *inode, void *buf,
4495 size_t buflen)
4496{
4497 struct nfs4_exception exception = { };
4498 int err;
4499
4500 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4501 return -EOPNOTSUPP;
4502
4503 do {
c1578b76
TM		 4504 err = _nfs4_get_security_label(inode, buf, buflen);
4505 trace_nfs4_get_security_label(inode, err);
4506 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4507 &exception);
4508 } while (exception.retry);
4509 return err;
4510}
4511
4512static int _nfs4_do_set_security_label(struct inode *inode,
4513 struct nfs4_label *ilabel,
4514 struct nfs_fattr *fattr,
4515 struct nfs4_label *olabel)
4516{
4517
4518 struct iattr sattr = {0};
4519 struct nfs_server *server = NFS_SERVER(inode);
4520 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4521 struct nfs_setattrargs args = {
4522 .fh = NFS_FH(inode),
4523 .iap = &sattr,
4524 .server = server,
4525 .bitmask = bitmask,
4526 .label = ilabel,
4527 };
4528 struct nfs_setattrres res = {
4529 .fattr = fattr,
4530 .label = olabel,
4531 .server = server,
4532 };
4533 struct rpc_message msg = {
4534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4535 .rpc_argp = &args,
4536 .rpc_resp = &res,
4537 };
4538 int status;
4539
4540 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4541
4542 status = rpc_call_sync(server->client, &msg, 0);
4543 if (status)
4544 dprintk("%s failed: %d\n", __func__, status);
4545
4546 return status;
4547}
4548
4549static int nfs4_do_set_security_label(struct inode *inode,
4550 struct nfs4_label *ilabel,
4551 struct nfs_fattr *fattr,
4552 struct nfs4_label *olabel)
4553{
4554 struct nfs4_exception exception = { };
4555 int err;
4556
4557 do {
c1578b76
TM		 4558 err = _nfs4_do_set_security_label(inode, ilabel,
4559 fattr, olabel);
4560 trace_nfs4_set_security_label(inode, err);
4561 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4562 &exception);
4563 } while (exception.retry);
4564 return err;
4565}
4566
4567static int
4568nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4569{
4570 struct nfs4_label ilabel, *olabel = NULL;
4571 struct nfs_fattr fattr;
4572 struct rpc_cred *cred;
4573 struct inode *inode = dentry->d_inode;
4574 int status;
4575
4576 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4577 return -EOPNOTSUPP;
4578
4579 nfs_fattr_init(&fattr);
4580
4581 ilabel.pi = 0;
4582 ilabel.lfs = 0;
4583 ilabel.label = (char *)buf;
4584 ilabel.len = buflen;
4585
4586 cred = rpc_lookup_cred();
4587 if (IS_ERR(cred))
4588 return PTR_ERR(cred);
4589
4590 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4591 if (IS_ERR(olabel)) {
4592 status = -PTR_ERR(olabel);
4593 goto out;
4594 }
4595
4596 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4597 if (status == 0)
4598 nfs_setsecurity(inode, &fattr, olabel);
4599
4600 nfs4_label_free(olabel);
4601out:
4602 put_rpccred(cred);
4603 return status;
4604}
4605#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4606
4607
1da177e4 4608static int
aa5190d0 4609nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4610{
aa5190d0
TM		 4611 struct nfs_client *clp = server->nfs_client;
4612
4613 if (task->tk_status >= 0)
1da177e4
LT		 4614 return 0;
4615 switch(task->tk_status) {
a1d0b5ee 4616 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4617 case -NFS4ERR_ADMIN_REVOKED:
4618 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4619 if (state == NULL)
4620 break;
4621 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4622 case -NFS4ERR_OPENMODE:
4623 if (state == NULL)
4624 break;
5d422301
TM		 4625 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4626 goto stateid_invalid;
0400a6b0 4627 goto wait_on_recovery;
0ced63d1 4628 case -NFS4ERR_EXPIRED:
5d422301
TM		 4629 if (state != NULL) {
4630 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4631 goto stateid_invalid;
4632 }
1da177e4 4633 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4634 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4635 nfs4_schedule_lease_recovery(clp);
4636 goto wait_on_recovery;
4745e315
AA		 4637#if defined(CONFIG_NFS_V4_1)
4638 case -NFS4ERR_BADSESSION:
4639 case -NFS4ERR_BADSLOT:
4640 case -NFS4ERR_BAD_HIGH_SLOT:
4641 case -NFS4ERR_DEADSESSION:
4642 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4643 case -NFS4ERR_SEQ_FALSE_RETRY:
4644 case -NFS4ERR_SEQ_MISORDERED:
4645 dprintk("%s ERROR %d, Reset session\n", __func__,
4646 task->tk_status);
9f594791 4647 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4648 task->tk_status = 0;
4649 return -EAGAIN;
4650#endif /* CONFIG_NFS_V4_1 */
1da177e4 4651 case -NFS4ERR_DELAY:
aa5190d0 4652 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4653 case -NFS4ERR_GRACE:
1da177e4
LT		 4654 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4655 task->tk_status = 0;
4656 return -EAGAIN;
a8a4ae3a 4657 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4658 case -NFS4ERR_OLD_STATEID:
4659 task->tk_status = 0;
4660 return -EAGAIN;
4661 }
4662 task->tk_status = nfs4_map_errors(task->tk_status);
4663 return 0;
5d422301
TM		 4664stateid_invalid:
4665 task->tk_status = -EIO;
4666 return 0;
0400a6b0 4667wait_on_recovery:
a2c0b9e2 4668 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4669 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4670 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4671 task->tk_status = 0;
4672 return -EAGAIN;
1da177e4
LT		 4673}
4674
f092075d
CL		 4675static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4676 nfs4_verifier *bootverf)
cd93710e
CL		 4677{
4678 __be32 verf[2];
4679
2c820d9a
CL		 4680 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4681 /* An impossible timestamp guarantees this value
4682 * will never match a generated boot time. */
4683 verf[0] = 0;
17f26b12 4684 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4685 } else {
f092075d 4686 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4687 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4688 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4689 }
cd93710e
CL		 4690 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4691}
4692
e984a55a
CL		 4693static unsigned int
4694nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4695 char *buf, size_t len)
4696{
4697 unsigned int result;
4698
4699 rcu_read_lock();
4700 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4701 clp->cl_ipaddr,
4702 rpc_peeraddr2str(clp->cl_rpcclient,
4703 RPC_DISPLAY_ADDR),
4704 rpc_peeraddr2str(clp->cl_rpcclient,
4705 RPC_DISPLAY_PROTO));
4706 rcu_read_unlock();
4707 return result;
4708}
4709
4710static unsigned int
4711nfs4_init_uniform_client_string(const struct nfs_client *clp,
4712 char *buf, size_t len)
4713{
55b59293 4714 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4715
4716 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4717 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4718 clp->rpc_ops->version,
4719 clp->cl_minorversion,
4720 nfs4_client_id_uniquifier,
4721 nodename);
e984a55a
CL		 4722 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4723 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4724 nodename);
e984a55a
CL		 4725}
4726
6bbb4ae8
CL		 4727/**
4728 * nfs4_proc_setclientid - Negotiate client ID
4729 * @clp: state data structure
4730 * @program: RPC program for NFSv4 callback service
4731 * @port: IP port number for NFS4 callback service
4732 * @cred: RPC credential to use for this call
4733 * @res: where to place the result
4734 *
4735 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4736 */
bb8b27e5
TM		 4737int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4738 unsigned short port, struct rpc_cred *cred,
4739 struct nfs4_setclientid_res *res)
1da177e4
LT		 4740{
4741 nfs4_verifier sc_verifier;
4742 struct nfs4_setclientid setclientid = {
4743 .sc_verifier = &sc_verifier,
4744 .sc_prog = program,
f4eecd5d 4745 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4746 };
4747 struct rpc_message msg = {
4748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4749 .rpc_argp = &setclientid,
bb8b27e5 4750 .rpc_resp = res,
286d7d6a 4751 .rpc_cred = cred,
1da177e4 4752 };
6bbb4ae8 4753 int status;
1da177e4 4754
de734831 4755 /* nfs_client_id4 */
f092075d 4756 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4757 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4758 setclientid.sc_name_len =
4759 nfs4_init_uniform_client_string(clp,
4760 setclientid.sc_name,
4761 sizeof(setclientid.sc_name));
4762 else
4763 setclientid.sc_name_len =
4764 nfs4_init_nonuniform_client_string(clp,
4765 setclientid.sc_name,
4766 sizeof(setclientid.sc_name));
de734831 4767 /* cb_client4 */
e984a55a 4768 rcu_read_lock();
de734831 4769 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4770 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4771 rpc_peeraddr2str(clp->cl_rpcclient,
4772 RPC_DISPLAY_NETID));
de734831
CL		 4773 rcu_read_unlock();
4774 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4775 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4776 clp->cl_ipaddr, port >> 8, port & 255);
4777
6bbb4ae8
CL		 4778 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4779 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4780 setclientid.sc_name_len, setclientid.sc_name);
4781 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4782 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4783 dprintk("NFS reply setclientid: %d\n", status);
4784 return status;
1da177e4
LT		 4785}
4786
6bbb4ae8
CL		 4787/**
4788 * nfs4_proc_setclientid_confirm - Confirm client ID
4789 * @clp: state data structure
4790 * @res: result of a previous SETCLIENTID
4791 * @cred: RPC credential to use for this call
4792 *
4793 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4794 */
fd954ae1 4795int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4796 struct nfs4_setclientid_res *arg,
4797 struct rpc_cred *cred)
1da177e4 4798{
1da177e4
LT		 4799 struct rpc_message msg = {
4800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4801 .rpc_argp = arg,
286d7d6a 4802 .rpc_cred = cred,
1da177e4 4803 };
1da177e4
LT		 4804 int status;
4805
6bbb4ae8
CL		 4806 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4807 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4808 clp->cl_clientid);
1bd714f2 4809 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4810 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4811 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4812 return status;
4813}
4814
fe650407
TM		 4815struct nfs4_delegreturndata {
4816 struct nfs4_delegreturnargs args;
fa178f29 4817 struct nfs4_delegreturnres res;
fe650407
TM		 4818 struct nfs_fh fh;
4819 nfs4_stateid stateid;
26e976a8 4820 unsigned long timestamp;
fa178f29 4821 struct nfs_fattr fattr;
fe650407
TM		 4822 int rpc_status;
4823};
4824
fe650407
TM		 4825static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4826{
4827 struct nfs4_delegreturndata *data = calldata;
938e1010 4828
14516c3a
TM		 4829 if (!nfs4_sequence_done(task, &data->res.seq_res))
4830 return;
938e1010 4831
ca8acf8d 4832 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4833 switch (task->tk_status) {
4834 case -NFS4ERR_STALE_STATEID:
4835 case -NFS4ERR_EXPIRED:
4836 case 0:
fa178f29 4837 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4838 break;
4839 default:
4840 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4841 -EAGAIN) {
d00c5d43 4842 rpc_restart_call_prepare(task);
79708861
RL		 4843 return;
4844 }
4845 }
4846 data->rpc_status = task->tk_status;
fe650407
TM		 4847}
4848
4849static void nfs4_delegreturn_release(void *calldata)
4850{
fe650407
TM		 4851 kfree(calldata);
4852}
4853
938e1010
AA		 4854#if defined(CONFIG_NFS_V4_1)
4855static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4856{
4857 struct nfs4_delegreturndata *d_data;
4858
4859 d_data = (struct nfs4_delegreturndata *)data;
4860
d9afbd1b
TM		 4861 nfs4_setup_sequence(d_data->res.server,
4862 &d_data->args.seq_args,
4863 &d_data->res.seq_res,
4864 task);
938e1010
AA		 4865}
4866#endif /* CONFIG_NFS_V4_1 */
4867
c8d149f3 4868static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4869#if defined(CONFIG_NFS_V4_1)
4870 .rpc_call_prepare = nfs4_delegreturn_prepare,
4871#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4872 .rpc_call_done = nfs4_delegreturn_done,
4873 .rpc_release = nfs4_delegreturn_release,
4874};
4875
e6f81075 4876static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4877{
4878 struct nfs4_delegreturndata *data;
fa178f29 4879 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4880 struct rpc_task *task;
5138fde0
TM		 4881 struct rpc_message msg = {
4882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4883 .rpc_cred = cred,
4884 };
c970aa85
TM		 4885 struct rpc_task_setup task_setup_data = {
4886 .rpc_client = server->client,
5138fde0 4887 .rpc_message = &msg,
c970aa85
TM		 4888 .callback_ops = &nfs4_delegreturn_ops,
4889 .flags = RPC_TASK_ASYNC,
4890 };
e6f81075 4891 int status = 0;
fe650407 4892
8535b2be 4893 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4894 if (data == NULL)
4895 return -ENOMEM;
9d12b216 4896 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4897 data->args.fhandle = &data->fh;
4898 data->args.stateid = &data->stateid;
9e907fec 4899 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4900 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4901 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4902 data->res.fattr = &data->fattr;
4903 data->res.server = server;
5138fde0 4904 nfs_fattr_init(data->res.fattr);
26e976a8 4905 data->timestamp = jiffies;
fe650407
TM		 4906 data->rpc_status = 0;
4907
c970aa85 4908 task_setup_data.callback_data = data;
1174dd1f
TM		 4909 msg.rpc_argp = &data->args;
4910 msg.rpc_resp = &data->res;
c970aa85 4911 task = rpc_run_task(&task_setup_data);
7a1218a2 4912 if (IS_ERR(task))
fe650407 4913 return PTR_ERR(task);
e6f81075
TM		 4914 if (!issync)
4915 goto out;
fe650407 4916 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4917 if (status != 0)
4918 goto out;
4919 status = data->rpc_status;
e144cbcc
TM		 4920 if (status == 0)
4921 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4922 else
4923 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4924out:
e6b3c4db 4925 rpc_put_task(task);
fe650407 4926 return status;
1da177e4
LT		 4927}
4928
e6f81075 4929int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4930{
4931 struct nfs_server *server = NFS_SERVER(inode);
4932 struct nfs4_exception exception = { };
4933 int err;
4934 do {
e6f81075 4935 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 4936 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 4937 switch (err) {
4938 case -NFS4ERR_STALE_STATEID:
4939 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4940 case 0:
4941 return 0;
4942 }
4943 err = nfs4_handle_exception(server, err, &exception);
4944 } while (exception.retry);
4945 return err;
4946}
4947
4948#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4949#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4950
4951/*
4952 * sleep, with exponential backoff, and retry the LOCK operation.
4953 */
4954static unsigned long
4955nfs4_set_lock_task_retry(unsigned long timeout)
4956{
416ad3c9 4957 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4958 timeout <<= 1;
4959 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4960 return NFS4_LOCK_MAXTIMEOUT;
4961 return timeout;
4962}
4963
1da177e4
LT		 4964static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4965{
4966 struct inode *inode = state->inode;
4967 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4968 struct nfs_client *clp = server->nfs_client;
911d1aaf 4969 struct nfs_lockt_args arg = {
1da177e4 4970 .fh = NFS_FH(inode),
911d1aaf 4971 .fl = request,
1da177e4 4972 };
911d1aaf
TM		 4973 struct nfs_lockt_res res = {
4974 .denied = request,
1da177e4
LT		 4975 };
4976 struct rpc_message msg = {
4977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4978 .rpc_argp = &arg,
4979 .rpc_resp = &res,
4980 .rpc_cred = state->owner->so_cred,
4981 };
1da177e4
LT		 4982 struct nfs4_lock_state *lsp;
4983 int status;
4984
911d1aaf 4985 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4986 status = nfs4_set_lock_state(state, request);
4987 if (status != 0)
4988 goto out;
4989 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4990 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4991 arg.lock_owner.s_dev = server->s_dev;
7c513058 4992 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4993 switch (status) {
4994 case 0:
4995 request->fl_type = F_UNLCK;
4996 break;
4997 case -NFS4ERR_DENIED:
4998 status = 0;
1da177e4 4999 }
70cc6487 5000 request->fl_ops->fl_release_private(request);
8d0a8a9d 5001out:
1da177e4
LT		 5002 return status;
5003}
5004
5005static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5006{
5007 struct nfs4_exception exception = { };
5008 int err;
5009
5010 do {
d1b748a5
TM		 5011 err = _nfs4_proc_getlk(state, cmd, request);
5012 trace_nfs4_get_lock(request, state, cmd, err);
5013 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5014 &exception);
5015 } while (exception.retry);
5016 return err;
5017}
5018
5019static int do_vfs_lock(struct file *file, struct file_lock *fl)
5020{
5021 int res = 0;
5022 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5023 case FL_POSIX:
5024 res = posix_lock_file_wait(file, fl);
5025 break;
5026 case FL_FLOCK:
5027 res = flock_lock_file_wait(file, fl);
5028 break;
5029 default:
5030 BUG();
5031 }
1da177e4
LT		 5032 return res;
5033}
5034
faf5f49c 5035struct nfs4_unlockdata {
911d1aaf
TM		 5036 struct nfs_locku_args arg;
5037 struct nfs_locku_res res;
faf5f49c
TM		 5038 struct nfs4_lock_state *lsp;
5039 struct nfs_open_context *ctx;
911d1aaf
TM		 5040 struct file_lock fl;
5041 const struct nfs_server *server;
26e976a8 5042 unsigned long timestamp;
faf5f49c
TM		 5043};
5044
911d1aaf
TM		 5045static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5046 struct nfs_open_context *ctx,
5047 struct nfs4_lock_state *lsp,
5048 struct nfs_seqid *seqid)
5049{
5050 struct nfs4_unlockdata *p;
5051 struct inode *inode = lsp->ls_state->inode;
5052
8535b2be 5053 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5054 if (p == NULL)
5055 return NULL;
5056 p->arg.fh = NFS_FH(inode);
5057 p->arg.fl = &p->fl;
5058 p->arg.seqid = seqid;
c1d51931 5059 p->res.seqid = seqid;
911d1aaf
TM		 5060 p->arg.stateid = &lsp->ls_stateid;
5061 p->lsp = lsp;
5062 atomic_inc(&lsp->ls_count);
5063 /* Ensure we don't close file until we're done freeing locks! */
5064 p->ctx = get_nfs_open_context(ctx);
5065 memcpy(&p->fl, fl, sizeof(p->fl));
5066 p->server = NFS_SERVER(inode);
5067 return p;
5068}
5069
06f814a3 5070static void nfs4_locku_release_calldata(void *data)
faf5f49c 5071{
963d8fe5 5072 struct nfs4_unlockdata *calldata = data;
911d1aaf 5073 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5074 nfs4_put_lock_state(calldata->lsp);
5075 put_nfs_open_context(calldata->ctx);
5076 kfree(calldata);
faf5f49c
TM		 5077}
5078
963d8fe5 5079static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5080{
963d8fe5 5081 struct nfs4_unlockdata *calldata = data;
faf5f49c 5082
14516c3a
TM		 5083 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5084 return;
faf5f49c
TM		 5085 switch (task->tk_status) {
5086 case 0:
f597c537
TM		 5087 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5088 &calldata->res.stateid);
26e976a8 5089 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5090 break;
9e33bed5
TM		 5091 case -NFS4ERR_BAD_STATEID:
5092 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5093 case -NFS4ERR_STALE_STATEID:
5094 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5095 break;
5096 default:
9e33bed5 5097 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5098 rpc_restart_call_prepare(task);
faf5f49c 5099 }
2b1bc308 5100 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5101}
5102
4ce70ada 5103static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5104{
4ce70ada 5105 struct nfs4_unlockdata *calldata = data;
faf5f49c 5106
911d1aaf 5107 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5108 goto out_wait;
795a88c9 5109 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5110 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5111 goto out_no_action;
faf5f49c 5112 }
26e976a8 5113 calldata->timestamp = jiffies;
035168ab 5114 if (nfs4_setup_sequence(calldata->server,
a893693c 5115 &calldata->arg.seq_args,
2240a9e2
TM		 5116 &calldata->res.seq_res,
5117 task) != 0)
5118 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5119 return;
5120out_no_action:
5121 task->tk_action = NULL;
5122out_wait:
5123 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5124}
5125
963d8fe5 5126static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5127 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5128 .rpc_call_done = nfs4_locku_done,
06f814a3 5129 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5130};
5131
a5d16a4d
TM		 5132static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5133 struct nfs_open_context *ctx,
5134 struct nfs4_lock_state *lsp,
5135 struct nfs_seqid *seqid)
5136{
5137 struct nfs4_unlockdata *data;
5138fde0
TM		 5138 struct rpc_message msg = {
5139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5140 .rpc_cred = ctx->cred,
5141 };
c970aa85
TM		 5142 struct rpc_task_setup task_setup_data = {
5143 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5144 .rpc_message = &msg,
c970aa85 5145 .callback_ops = &nfs4_locku_ops,
101070ca 5146 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5147 .flags = RPC_TASK_ASYNC,
5148 };
a5d16a4d 5149
137d6aca
FF		 5150 /* Ensure this is an unlock - when canceling a lock, the
5151 * canceled lock is passed in, and it won't be an unlock.
5152 */
5153 fl->fl_type = F_UNLCK;
5154
a5d16a4d
TM		 5155 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5156 if (data == NULL) {
5157 nfs_free_seqid(seqid);
5158 return ERR_PTR(-ENOMEM);
5159 }
5160
9d12b216 5161 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5162 msg.rpc_argp = &data->arg;
5163 msg.rpc_resp = &data->res;
c970aa85
TM		 5164 task_setup_data.callback_data = data;
5165 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5166}
5167
faf5f49c
TM		 5168static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5169{
65b62a29
TM		 5170 struct inode *inode = state->inode;
5171 struct nfs4_state_owner *sp = state->owner;
5172 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5173 struct nfs_seqid *seqid;
1da177e4 5174 struct nfs4_lock_state *lsp;
06f814a3
TM		 5175 struct rpc_task *task;
5176 int status = 0;
536ff0f8 5177 unsigned char fl_flags = request->fl_flags;
faf5f49c 5178
8d0a8a9d 5179 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5180 /* Unlock _before_ we do the RPC call */
5181 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5182 /* Exclude nfs_delegation_claim_locks() */
5183 mutex_lock(&sp->so_delegreturn_mutex);
5184 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5185 down_read(&nfsi->rwsem);
5186 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5187 up_read(&nfsi->rwsem);
65b62a29 5188 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5189 goto out;
19e03c57
TM		 5190 }
5191 up_read(&nfsi->rwsem);
65b62a29 5192 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5193 if (status != 0)
9b073574
TM		 5194 goto out;
5195 /* Is this a delegated lock? */
8d0a8a9d 5196 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5197 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5198 goto out;
8535b2be 5199 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5200 status = -ENOMEM;
911d1aaf 5201 if (seqid == NULL)
9b073574 5202 goto out;
cd3758e3 5203 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5204 status = PTR_ERR(task);
5205 if (IS_ERR(task))
9b073574 5206 goto out;
a5d16a4d 5207 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5208 rpc_put_task(task);
9b073574 5209out:
536ff0f8 5210 request->fl_flags = fl_flags;
d1b748a5 5211 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5212 return status;
5213}
5214
a5d16a4d
TM		 5215struct nfs4_lockdata {
5216 struct nfs_lock_args arg;
5217 struct nfs_lock_res res;
5218 struct nfs4_lock_state *lsp;
5219 struct nfs_open_context *ctx;
5220 struct file_lock fl;
26e976a8 5221 unsigned long timestamp;
a5d16a4d
TM		 5222 int rpc_status;
5223 int cancelled;
66179efe 5224 struct nfs_server *server;
a5d16a4d
TM		 5225};
5226
5227static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5228 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5229 gfp_t gfp_mask)
1da177e4 5230{
a5d16a4d
TM		 5231 struct nfs4_lockdata *p;
5232 struct inode *inode = lsp->ls_state->inode;
1da177e4 5233 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5234
8535b2be 5235 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5236 if (p == NULL)
5237 return NULL;
5238
5239 p->arg.fh = NFS_FH(inode);
5240 p->arg.fl = &p->fl;
8535b2be 5241 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5242 if (p->arg.open_seqid == NULL)
5243 goto out_free;
8535b2be 5244 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5245 if (p->arg.lock_seqid == NULL)
2f74c0a0 5246 goto out_free_seqid;
a5d16a4d 5247 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5248 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5249 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5250 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5251 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5252 p->lsp = lsp;
66179efe 5253 p->server = server;
a5d16a4d
TM		 5254 atomic_inc(&lsp->ls_count);
5255 p->ctx = get_nfs_open_context(ctx);
5256 memcpy(&p->fl, fl, sizeof(p->fl));
5257 return p;
2f74c0a0
TM		 5258out_free_seqid:
5259 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5260out_free:
5261 kfree(p);
5262 return NULL;
5263}
5264
5265static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5266{
5267 struct nfs4_lockdata *data = calldata;
5268 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5269
3110ff80 5270 dprintk("%s: begin!\n", __func__);
2f74c0a0 5271 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5272 goto out_wait;
a5d16a4d
TM		 5273 /* Do we need to do an open_to_lock_owner? */
5274 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5275 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5276 goto out_release_lock_seqid;
8fe72bac 5277 }
8e472f33 5278 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5279 data->arg.new_lock_owner = 1;
c1d51931 5280 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5281 } else
5282 data->arg.new_lock_owner = 0;
5d422301
TM		 5283 if (!nfs4_valid_open_stateid(state)) {
5284 data->rpc_status = -EBADF;
5285 task->tk_action = NULL;
5286 goto out_release_open_seqid;
5287 }
26e976a8 5288 data->timestamp = jiffies;
035168ab
TM		 5289 if (nfs4_setup_sequence(data->server,
5290 &data->arg.seq_args,
2240a9e2 5291 &data->res.seq_res,
d9afbd1b 5292 task) == 0)
66179efe 5293 return;
5d422301 5294out_release_open_seqid:
2240a9e2
TM		 5295 nfs_release_seqid(data->arg.open_seqid);
5296out_release_lock_seqid:
5297 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5298out_wait:
5299 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5300 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5301}
5302
a5d16a4d
TM		 5303static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5304{
5305 struct nfs4_lockdata *data = calldata;
5306
3110ff80 5307 dprintk("%s: begin!\n", __func__);
a5d16a4d 5308
14516c3a
TM		 5309 if (!nfs4_sequence_done(task, &data->res.seq_res))
5310 return;
66179efe 5311
a5d16a4d 5312 data->rpc_status = task->tk_status;
a5d16a4d 5313 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5314 if (data->rpc_status == 0)
5315 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5316 else
5317 goto out;
5318 }
5319 if (data->rpc_status == 0) {
f597c537 5320 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5321 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5322 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5323 }
a5d16a4d 5324out:
3110ff80 5325 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5326}
5327
5328static void nfs4_lock_release(void *calldata)
5329{
5330 struct nfs4_lockdata *data = calldata;
5331
3110ff80 5332 dprintk("%s: begin!\n", __func__);
2f74c0a0 5333 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5334 if (data->cancelled != 0) {
5335 struct rpc_task *task;
5336 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5337 data->arg.lock_seqid);
5338 if (!IS_ERR(task))
bf294b41 5339 rpc_put_task_async(task);
3110ff80 5340 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5341 } else
5342 nfs_free_seqid(data->arg.lock_seqid);
5343 nfs4_put_lock_state(data->lsp);
5344 put_nfs_open_context(data->ctx);
5345 kfree(data);
3110ff80 5346 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5347}
5348
5349static const struct rpc_call_ops nfs4_lock_ops = {
5350 .rpc_call_prepare = nfs4_lock_prepare,
5351 .rpc_call_done = nfs4_lock_done,
5352 .rpc_release = nfs4_lock_release,
5353};
5354
2bee72a6
TM		 5355static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5356{
2bee72a6
TM		 5357 switch (error) {
5358 case -NFS4ERR_ADMIN_REVOKED:
5359 case -NFS4ERR_BAD_STATEID:
ecac799a 5360 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5361 if (new_lock_owner != 0 ||
795a88c9 5362 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5363 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5364 break;
5365 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5366 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5367 case -NFS4ERR_EXPIRED:
5368 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5369 };
5370}
5371
afe6c27c 5372static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5373{
5374 struct nfs4_lockdata *data;
5375 struct rpc_task *task;
5138fde0
TM		 5376 struct rpc_message msg = {
5377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5378 .rpc_cred = state->owner->so_cred,
5379 };
c970aa85
TM		 5380 struct rpc_task_setup task_setup_data = {
5381 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5382 .rpc_message = &msg,
c970aa85 5383 .callback_ops = &nfs4_lock_ops,
101070ca 5384 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5385 .flags = RPC_TASK_ASYNC,
5386 };
a5d16a4d
TM		 5387 int ret;
5388
3110ff80 5389 dprintk("%s: begin!\n", __func__);
cd3758e3 5390 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5391 fl->fl_u.nfs4_fl.owner,
5392 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5393 if (data == NULL)
5394 return -ENOMEM;
5395 if (IS_SETLKW(cmd))
5396 data->arg.block = 1;
9d12b216 5397 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5398 msg.rpc_argp = &data->arg;
5399 msg.rpc_resp = &data->res;
c970aa85 5400 task_setup_data.callback_data = data;
8fe72bac
TM		 5401 if (recovery_type > NFS_LOCK_NEW) {
5402 if (recovery_type == NFS_LOCK_RECLAIM)
5403 data->arg.reclaim = NFS_LOCK_RECLAIM;
5404 nfs4_set_sequence_privileged(&data->arg.seq_args);
5405 }
c970aa85 5406 task = rpc_run_task(&task_setup_data);
7a1218a2 5407 if (IS_ERR(task))
a5d16a4d 5408 return PTR_ERR(task);
a5d16a4d
TM		 5409 ret = nfs4_wait_for_completion_rpc_task(task);
5410 if (ret == 0) {
5411 ret = data->rpc_status;
2bee72a6
TM		 5412 if (ret)
5413 nfs4_handle_setlk_error(data->server, data->lsp,
5414 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5415 } else
5416 data->cancelled = 1;
e6b3c4db 5417 rpc_put_task(task);
3110ff80 5418 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5419 return ret;
1da177e4
LT		 5420}
5421
5422static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5423{
202b50dc 5424 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5425 struct nfs4_exception exception = {
5426 .inode = state->inode,
5427 };
202b50dc
TM		 5428 int err;
5429
5430 do {
42a2d13e
TM		 5431 /* Cache the lock if possible... */
5432 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5433 return 0;
afe6c27c 5434 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5435 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5436 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5437 break;
5438 nfs4_handle_exception(server, err, &exception);
5439 } while (exception.retry);
5440 return err;
1da177e4
LT		 5441}
5442
5443static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5444{
202b50dc 5445 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5446 struct nfs4_exception exception = {
5447 .inode = state->inode,
5448 };
202b50dc
TM		 5449 int err;
5450
6bfc93ef
TM		 5451 err = nfs4_set_lock_state(state, request);
5452 if (err != 0)
5453 return err;
202b50dc 5454 do {
42a2d13e
TM		 5455 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5456 return 0;
afe6c27c 5457 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5458 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5459 switch (err) {
5460 default:
5461 goto out;
5462 case -NFS4ERR_GRACE:
5463 case -NFS4ERR_DELAY:
5464 nfs4_handle_exception(server, err, &exception);
5465 err = 0;
5466 }
202b50dc 5467 } while (exception.retry);
a9ed2e25 5468out:
202b50dc 5469 return err;
1da177e4
LT		 5470}
5471
f062eb6c 5472#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5473/**
5474 * nfs41_check_expired_locks - possibly free a lock stateid
5475 *
5476 * @state: NFSv4 state for an inode
5477 *
5478 * Returns NFS_OK if recovery for this stateid is now finished.
5479 * Otherwise a negative NFS4ERR value is returned.
5480 */
b01dd1d8 5481static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5482{
eb64cf96 5483 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5484 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5485 struct nfs_server *server = NFS_SERVER(state->inode);
5486
b01dd1d8 5487 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5488 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5489 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5490
5491 status = nfs41_test_stateid(server,
5492 &lsp->ls_stateid,
5493 cred);
08cb47fa 5494 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5495 if (status != NFS_OK) {
3e60ffdd
CL		 5496 /* Free the stateid unless the server
5497 * informs us the stateid is unrecognized. */
89af2739
CL		 5498 if (status != -NFS4ERR_BAD_STATEID)
5499 nfs41_free_stateid(server,
ab7cb0df
TM		 5500 &lsp->ls_stateid,
5501 cred);
795a88c9 5502 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5503 ret = status;
5504 }
5505 }
5506 };
5507
5508 return ret;
5509}
5510
5511static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5512{
5513 int status = NFS_OK;
5514
5515 if (test_bit(LK_STATE_IN_USE, &state->flags))
5516 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5517 if (status != NFS_OK)
5518 status = nfs4_lock_expired(state, request);
5519 return status;
f062eb6c
BS		 5520}
5521#endif
5522
1da177e4
LT		 5523static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5524{
9a99af49 5525 struct nfs4_state_owner *sp = state->owner;
19e03c57 5526 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5527 unsigned char fl_flags = request->fl_flags;
9a99af49 5528 unsigned int seq;
8e469ebd 5529 int status = -ENOLCK;
1da177e4 5530
8e469ebd
TM		 5531 if ((fl_flags & FL_POSIX) &&
5532 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5533 goto out;
6bfc93ef 5534 /* Is this a delegated open? */
6bfc93ef
TM		 5535 status = nfs4_set_lock_state(state, request);
5536 if (status != 0)
5537 goto out;
01c3b861
TM		 5538 request->fl_flags |= FL_ACCESS;
5539 status = do_vfs_lock(request->fl_file, request);
5540 if (status < 0)
5541 goto out;
19e03c57 5542 down_read(&nfsi->rwsem);
01c3b861 5543 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5544 /* Yes: cache locks! */
01c3b861 5545 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5546 request->fl_flags = fl_flags & ~FL_SLEEP;
5547 status = do_vfs_lock(request->fl_file, request);
5548 goto out_unlock;
01c3b861 5549 }
9a99af49
TM		 5550 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5551 up_read(&nfsi->rwsem);
afe6c27c 5552 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5553 if (status != 0)
9a99af49
TM		 5554 goto out;
5555 down_read(&nfsi->rwsem);
5556 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5557 status = -NFS4ERR_DELAY;
01c3b861 5558 goto out_unlock;
9a99af49 5559 }
6bfc93ef 5560 /* Note: we always want to sleep here! */
01c3b861 5561 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5562 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5563 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5564 "manager!\n", __func__);
01c3b861 5565out_unlock:
19e03c57 5566 up_read(&nfsi->rwsem);
01c3b861
TM		 5567out:
5568 request->fl_flags = fl_flags;
1da177e4
LT		 5569 return status;
5570}
5571
5572static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5573{
a1d0b5ee
TM		 5574 struct nfs4_exception exception = {
5575 .state = state,
05ffe24f 5576 .inode = state->inode,
a1d0b5ee 5577 };
1da177e4
LT		 5578 int err;
5579
5580 do {
965b5d67 5581 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5582 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5583 if (err == -NFS4ERR_DENIED)
5584 err = -EAGAIN;
1da177e4 5585 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5586 err, &exception);
1da177e4
LT		 5587 } while (exception.retry);
5588 return err;
5589}
5590
5591static int
5592nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5593{
5594 struct nfs_open_context *ctx;
5595 struct nfs4_state *state;
5596 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5597 int status;
5598
5599 /* verify open state */
cd3758e3 5600 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5601 state = ctx->state;
5602
5603 if (request->fl_start < 0 || request->fl_end < 0)
5604 return -EINVAL;
5605
d953126a
TM		 5606 if (IS_GETLK(cmd)) {
5607 if (state != NULL)
5608 return nfs4_proc_getlk(state, F_GETLK, request);
5609 return 0;
5610 }
1da177e4
LT		 5611
5612 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5613 return -EINVAL;
5614
d953126a
TM		 5615 if (request->fl_type == F_UNLCK) {
5616 if (state != NULL)
5617 return nfs4_proc_unlck(state, cmd, request);
5618 return 0;
5619 }
1da177e4 5620
d953126a
TM		 5621 if (state == NULL)
5622 return -ENOLCK;
55725513
TM		 5623 /*
5624 * Don't rely on the VFS having checked the file open mode,
5625 * since it won't do this for flock() locks.
5626 */
f44106e2 5627 switch (request->fl_type) {
55725513
TM		 5628 case F_RDLCK:
5629 if (!(filp->f_mode & FMODE_READ))
5630 return -EBADF;
5631 break;
5632 case F_WRLCK:
5633 if (!(filp->f_mode & FMODE_WRITE))
5634 return -EBADF;
5635 }
5636
1da177e4
LT		 5637 do {
5638 status = nfs4_proc_setlk(state, cmd, request);
5639 if ((status != -EAGAIN) || IS_SETLK(cmd))
5640 break;
5641 timeout = nfs4_set_lock_task_retry(timeout);
5642 status = -ERESTARTSYS;
5643 if (signalled())
5644 break;
5645 } while(status < 0);
1da177e4
LT		 5646 return status;
5647}
5648
db4f2e63 5649int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5650{
5651 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5652 int err;
5653
5654 err = nfs4_set_lock_state(state, fl);
5655 if (err != 0)
db4f2e63 5656 return err;
4a706fa0 5657 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5658 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5659}
6b3b5496 5660
cf470c3e
TM		 5661struct nfs_release_lockowner_data {
5662 struct nfs4_lock_state *lsp;
5ae67c4f 5663 struct nfs_server *server;
cf470c3e
TM		 5664 struct nfs_release_lockowner_args args;
5665};
5666
d3c7b7cc
TM		 5667static void nfs4_release_lockowner_release(void *calldata)
5668{
cf470c3e 5669 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5670 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5671 kfree(calldata);
5672}
5673
17280175 5674static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5675 .rpc_release = nfs4_release_lockowner_release,
5676};
5677
c8b2d0bf 5678static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5679{
cf470c3e 5680 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5681 struct rpc_message msg = {
5682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5683 };
5684
5685 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5686 return -EINVAL;
5687 data = kmalloc(sizeof(*data), GFP_NOFS);
5688 if (!data)
5689 return -ENOMEM;
5690 data->lsp = lsp;
5ae67c4f 5691 data->server = server;
cf470c3e
TM		 5692 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5693 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5694 data->args.lock_owner.s_dev = server->s_dev;
5695 msg.rpc_argp = &data->args;
5696 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5697 return 0;
d3c7b7cc
TM		 5698}
5699
aa1870af
BF		 5700#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5701
64c2ce8b
AK		 5702static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5703 const void *buf, size_t buflen,
5704 int flags, int type)
6b3b5496 5705{
64c2ce8b
AK		 5706 if (strcmp(key, "") != 0)
5707 return -EINVAL;
4b580ee3 5708
64c2ce8b 5709 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5710}
5711
64c2ce8b
AK		 5712static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5713 void *buf, size_t buflen, int type)
6b3b5496 5714{
64c2ce8b
AK		 5715 if (strcmp(key, "") != 0)
5716 return -EINVAL;
aa1870af 5717
64c2ce8b 5718 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5719}
5720
64c2ce8b
AK		 5721static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5722 size_t list_len, const char *name,
5723 size_t name_len, int type)
6b3b5496 5724{
64c2ce8b 5725 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5726
096455a2
BF		 5727 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5728 return 0;
64c2ce8b
AK		 5729
5730 if (list && len <= list_len)
5731 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5732 return len;
6b3b5496
BF		 5733}
5734
c9bccef6
DQ		 5735#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5736static inline int nfs4_server_supports_labels(struct nfs_server *server)
5737{
5738 return server->caps & NFS_CAP_SECURITY_LABEL;
5739}
5740
5741static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5742 const void *buf, size_t buflen,
5743 int flags, int type)
5744{
5745 if (security_ismaclabel(key))
5746 return nfs4_set_security_label(dentry, buf, buflen);
5747
5748 return -EOPNOTSUPP;
5749}
5750
5751static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5752 void *buf, size_t buflen, int type)
5753{
5754 if (security_ismaclabel(key))
5755 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5756 return -EOPNOTSUPP;
5757}
5758
5759static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5760 size_t list_len, const char *name,
5761 size_t name_len, int type)
5762{
5763 size_t len = 0;
5764
5765 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5766 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5767 if (list && len <= list_len)
5768 security_inode_listsecurity(dentry->d_inode, list, len);
5769 }
5770 return len;
5771}
5772
5773static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5774 .prefix = XATTR_SECURITY_PREFIX,
5775 .list = nfs4_xattr_list_nfs4_label,
5776 .get = nfs4_xattr_get_nfs4_label,
5777 .set = nfs4_xattr_set_nfs4_label,
5778};
5779#endif
5780
5781
533eb461
AA		 5782/*
5783 * nfs_fhget will use either the mounted_on_fileid or the fileid
5784 */
69aaaae1
TM		 5785static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5786{
533eb461
AA		 5787 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5788 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5789 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5790 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5791 return;
5792
5793 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5794 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5795 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5796 fattr->nlink = 2;
5797}
5798
f05d147f
BS		 5799static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5800 const struct qstr *name,
5801 struct nfs4_fs_locations *fs_locations,
5802 struct page *page)
683b57b4
TM		 5803{
5804 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5805 u32 bitmask[3] = {
361e624f 5806 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5807 };
5808 struct nfs4_fs_locations_arg args = {
5809 .dir_fh = NFS_FH(dir),
c228fd3a 5810 .name = name,
683b57b4
TM		 5811 .page = page,
5812 .bitmask = bitmask,
5813 };
22958463
BH		 5814 struct nfs4_fs_locations_res res = {
5815 .fs_locations = fs_locations,
5816 };
683b57b4
TM		 5817 struct rpc_message msg = {
5818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5819 .rpc_argp = &args,
22958463 5820 .rpc_resp = &res,
683b57b4
TM		 5821 };
5822 int status;
5823
3110ff80 5824 dprintk("%s: start\n", __func__);
533eb461
AA		 5825
5826 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5827 * is not supported */
5828 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5829 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5830 else
5831 bitmask[0] |= FATTR4_WORD0_FILEID;
5832
c228fd3a 5833 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5834 fs_locations->server = server;
830b8e33 5835 fs_locations->nlocations = 0;
f05d147f 5836 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5837 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5838 return status;
5839}
5840
f05d147f
BS		 5841int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5842 const struct qstr *name,
5843 struct nfs4_fs_locations *fs_locations,
5844 struct page *page)
db0a9593
BS		 5845{
5846 struct nfs4_exception exception = { };
5847 int err;
5848 do {
078ea3df
TM		 5849 err = _nfs4_proc_fs_locations(client, dir, name,
5850 fs_locations, page);
5851 trace_nfs4_get_fs_locations(dir, name, err);
5852 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5853 &exception);
5854 } while (exception.retry);
5855 return err;
5856}
5857
5ec16a85 5858/**
a5250def
WAA		 5859 * If 'use_integrity' is true and the state managment nfs_client
5860 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
5861 * and the machine credential as per RFC3530bis and RFC5661 Security
5862 * Considerations sections. Otherwise, just use the user cred with the
5863 * filesystem's rpc_client.
5ec16a85 5864 */
a5250def 5865static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 5866{
5867 int status;
5868 struct nfs4_secinfo_arg args = {
5869 .dir_fh = NFS_FH(dir),
5870 .name = name,
5871 };
5872 struct nfs4_secinfo_res res = {
5873 .flavors = flavors,
5874 };
5875 struct rpc_message msg = {
5876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5877 .rpc_argp = &args,
5878 .rpc_resp = &res,
5879 };
a5250def
WAA		 5880 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
5881
5882 if (use_integrity) {
5883 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
5884 msg.rpc_cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
5885 }
5a5ea0d4
BS		 5886
5887 dprintk("NFS call secinfo %s\n", name->name);
a5250def
WAA		 5888 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
5889 &res.seq_res, 0);
5a5ea0d4 5890 dprintk("NFS reply secinfo: %d\n", status);
a5250def
WAA		 5891
5892 if (msg.rpc_cred)
5893 put_rpccred(msg.rpc_cred);
5894
5a5ea0d4
BS		 5895 return status;
5896}
5897
72de53ec
BS		 5898int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5899 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5900{
5901 struct nfs4_exception exception = { };
5902 int err;
5903 do {
a5250def
WAA		 5904 err = -NFS4ERR_WRONGSEC;
5905
5906 /* try to use integrity protection with machine cred */
5907 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
5908 err = _nfs4_proc_secinfo(dir, name, flavors, true);
5909
5910 /*
5911 * if unable to use integrity protection, or SECINFO with
5912 * integrity protection returns NFS4ERR_WRONGSEC (which is
5913 * disallowed by spec, but exists in deployed servers) use
5914 * the current filesystem's rpc_client and the user cred.
5915 */
5916 if (err == -NFS4ERR_WRONGSEC)
5917 err = _nfs4_proc_secinfo(dir, name, flavors, false);
5918
078ea3df
TM		 5919 trace_nfs4_secinfo(dir, name, err);
5920 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 5921 &exception);
5922 } while (exception.retry);
5923 return err;
5924}
5925
557134a3 5926#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5927/*
5928 * Check the exchange flags returned by the server for invalid flags, having
5929 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5930 * DS flags set.
5931 */
5932static int nfs4_check_cl_exchange_flags(u32 flags)
5933{
5934 if (flags & ~EXCHGID4_FLAG_MASK_R)
5935 goto out_inval;
5936 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5937 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5938 goto out_inval;
5939 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5940 goto out_inval;
5941 return NFS_OK;
5942out_inval:
5943 return -NFS4ERR_INVAL;
5944}
5945
78fe0f41 5946static bool
79d4e1f0
CL		 5947nfs41_same_server_scope(struct nfs41_server_scope *a,
5948 struct nfs41_server_scope *b)
78fe0f41
WAA		 5949{
5950 if (a->server_scope_sz == b->server_scope_sz &&
5951 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5952 return true;
5953
5954 return false;
5955}
5956
7c44f1ae
WAA		 5957/*
5958 * nfs4_proc_bind_conn_to_session()
5959 *
5960 * The 4.1 client currently uses the same TCP connection for the
5961 * fore and backchannel.
5962 */
2cf047c9 5963int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5964{
5965 int status;
5966 struct nfs41_bind_conn_to_session_res res;
5967 struct rpc_message msg = {
5968 .rpc_proc =
5969 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5970 .rpc_argp = clp,
5971 .rpc_resp = &res,
2cf047c9 5972 .rpc_cred = cred,
7c44f1ae
WAA		 5973 };
5974
5975 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5976
5977 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5978 if (unlikely(res.session == NULL)) {
5979 status = -ENOMEM;
5980 goto out;
5981 }
5982
5983 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5984 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 5985 if (status == 0) {
5986 if (memcmp(res.session->sess_id.data,
5987 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5988 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5989 status = -EIO;
5990 goto out_session;
5991 }
5992 if (res.dir != NFS4_CDFS4_BOTH) {
5993 dprintk("NFS: %s: Unexpected direction from server\n",
5994 __func__);
5995 status = -EIO;
5996 goto out_session;
5997 }
5998 if (res.use_conn_in_rdma_mode) {
5999 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6000 __func__);
6001 status = -EIO;
6002 goto out_session;
6003 }
6004 }
6005out_session:
6006 kfree(res.session);
6007out:
6008 dprintk("<-- %s status= %d\n", __func__, status);
6009 return status;
6010}
6011
99fe60d0
BH		 6012/*
6013 * nfs4_proc_exchange_id()
6014 *
6bbb4ae8
CL		 6015 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6016 *
99fe60d0
BH		 6017 * Since the clientid has expired, all compounds using sessions
6018 * associated with the stale clientid will be returning
6019 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6020 * be in some phase of session reset.
6021 */
4d643d1d 6022int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 6023{
6024 nfs4_verifier verifier;
6025 struct nfs41_exchange_id_args args = {
cd93710e 6026 .verifier = &verifier,
99fe60d0 6027 .client = clp,
4f0b429d
TM		 6028 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6029 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6030 };
6031 struct nfs41_exchange_id_res res = {
32b01310 6032 0
99fe60d0
BH		 6033 };
6034 int status;
6035 struct rpc_message msg = {
6036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6037 .rpc_argp = &args,
6038 .rpc_resp = &res,
6039 .rpc_cred = cred,
6040 };
99fe60d0 6041
f092075d 6042 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6043 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6044 sizeof(args.id));
6bbb4ae8
CL		 6045 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6046 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6047 args.id_len, args.id);
99fe60d0 6048
acdeb69d 6049 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6050 GFP_NOFS);
acdeb69d 6051 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6052 status = -ENOMEM;
6053 goto out;
6054 }
78fe0f41 6055
79d4e1f0 6056 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6057 GFP_NOFS);
177313f1 6058 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6059 status = -ENOMEM;
acdeb69d 6060 goto out_server_owner;
abe9a6d5 6061 }
78fe0f41 6062
bbafffd2 6063 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6064 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6065 status = -ENOMEM;
6066 goto out_server_scope;
6067 }
6068
1bd714f2 6069 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6070 trace_nfs4_exchange_id(clp, status);
177313f1 6071 if (status == 0)
32b01310 6072 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6073
acdeb69d 6074 if (status == 0) {
32b01310
TM		 6075 clp->cl_clientid = res.clientid;
6076 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6077 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6078 clp->cl_seqid = res.seqid;
6079
acdeb69d
CL		 6080 kfree(clp->cl_serverowner);
6081 clp->cl_serverowner = res.server_owner;
6082 res.server_owner = NULL;
78fe0f41 6083
7d2ed9ac 6084 /* use the most recent implementation id */
59155546
CL		 6085 kfree(clp->cl_implid);
6086 clp->cl_implid = res.impl_id;
7d2ed9ac 6087
177313f1 6088 if (clp->cl_serverscope != NULL &&
79d4e1f0 6089 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6090 res.server_scope)) {
6091 dprintk("%s: server_scope mismatch detected\n",
6092 __func__);
6093 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6094 kfree(clp->cl_serverscope);
6095 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6096 }
6097
177313f1 6098 if (clp->cl_serverscope == NULL) {
79d4e1f0 6099 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6100 goto out;
6101 }
32b01310
TM		 6102 } else
6103 kfree(res.impl_id);
7d2ed9ac 6104
acdeb69d
CL		 6105out_server_owner:
6106 kfree(res.server_owner);
7d2ed9ac 6107out_server_scope:
abe9a6d5
WAA		 6108 kfree(res.server_scope);
6109out:
177313f1 6110 if (clp->cl_implid != NULL)
6bbb4ae8 6111 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6112 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6113 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6114 clp->cl_implid->date.seconds,
6115 clp->cl_implid->date.nseconds);
6bbb4ae8 6116 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6117 return status;
6118}
6119
66245539
TM		 6120static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6121 struct rpc_cred *cred)
6122{
6123 struct rpc_message msg = {
6124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6125 .rpc_argp = clp,
6126 .rpc_cred = cred,
6127 };
6128 int status;
6129
6130 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6131 trace_nfs4_destroy_clientid(clp, status);
66245539 6132 if (status)
02c67525 6133 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6134 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6135 return status;
6136}
6137
6138static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6139 struct rpc_cred *cred)
6140{
6141 unsigned int loop;
6142 int ret;
6143
6144 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6145 ret = _nfs4_proc_destroy_clientid(clp, cred);
6146 switch (ret) {
6147 case -NFS4ERR_DELAY:
6148 case -NFS4ERR_CLIENTID_BUSY:
6149 ssleep(1);
6150 break;
6151 default:
6152 return ret;
6153 }
6154 }
6155 return 0;
6156}
6157
6158int nfs4_destroy_clientid(struct nfs_client *clp)
6159{
6160 struct rpc_cred *cred;
6161 int ret = 0;
6162
6163 if (clp->cl_mvops->minor_version < 1)
6164 goto out;
6165 if (clp->cl_exchange_flags == 0)
6166 goto out;
05f4c350
CL		 6167 if (clp->cl_preserve_clid)
6168 goto out;
73d8bde5 6169 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6170 ret = nfs4_proc_destroy_clientid(clp, cred);
6171 if (cred)
6172 put_rpccred(cred);
6173 switch (ret) {
6174 case 0:
6175 case -NFS4ERR_STALE_CLIENTID:
6176 clp->cl_exchange_flags = 0;
6177 }
6178out:
6179 return ret;
6180}
6181
2050f0cc
AA		 6182struct nfs4_get_lease_time_data {
6183 struct nfs4_get_lease_time_args *args;
6184 struct nfs4_get_lease_time_res *res;
6185 struct nfs_client *clp;
6186};
6187
6188static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6189 void *calldata)
6190{
2050f0cc
AA		 6191 struct nfs4_get_lease_time_data *data =
6192 (struct nfs4_get_lease_time_data *)calldata;
6193
6194 dprintk("--> %s\n", __func__);
6195 /* just setup sequence, do not trigger session recovery
6196 since we're invoked within one */
d9afbd1b
TM		 6197 nfs41_setup_sequence(data->clp->cl_session,
6198 &data->args->la_seq_args,
6199 &data->res->lr_seq_res,
6200 task);
2050f0cc
AA		 6201 dprintk("<-- %s\n", __func__);
6202}
6203
6204/*
6205 * Called from nfs4_state_manager thread for session setup, so don't recover
6206 * from sequence operation or clientid errors.
6207 */
6208static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6209{
6210 struct nfs4_get_lease_time_data *data =
6211 (struct nfs4_get_lease_time_data *)calldata;
6212
6213 dprintk("--> %s\n", __func__);
14516c3a
TM		 6214 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6215 return;
2050f0cc
AA		 6216 switch (task->tk_status) {
6217 case -NFS4ERR_DELAY:
6218 case -NFS4ERR_GRACE:
6219 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6220 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6221 task->tk_status = 0;
a8a4ae3a
AA		 6222 /* fall through */
6223 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6224 rpc_restart_call_prepare(task);
2050f0cc
AA		 6225 return;
6226 }
2050f0cc
AA		 6227 dprintk("<-- %s\n", __func__);
6228}
6229
17280175 6230static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6231 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6232 .rpc_call_done = nfs4_get_lease_time_done,
6233};
6234
6235int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6236{
6237 struct rpc_task *task;
6238 struct nfs4_get_lease_time_args args;
6239 struct nfs4_get_lease_time_res res = {
6240 .lr_fsinfo = fsinfo,
6241 };
6242 struct nfs4_get_lease_time_data data = {
6243 .args = &args,
6244 .res = &res,
6245 .clp = clp,
6246 };
6247 struct rpc_message msg = {
6248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6249 .rpc_argp = &args,
6250 .rpc_resp = &res,
6251 };
6252 struct rpc_task_setup task_setup = {
6253 .rpc_client = clp->cl_rpcclient,
6254 .rpc_message = &msg,
6255 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6256 .callback_data = &data,
6257 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6258 };
6259 int status;
6260
9d12b216 6261 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6262 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6263 dprintk("--> %s\n", __func__);
6264 task = rpc_run_task(&task_setup);
6265
6266 if (IS_ERR(task))
6267 status = PTR_ERR(task);
6268 else {
6269 status = task->tk_status;
6270 rpc_put_task(task);
6271 }
6272 dprintk("<-- %s return %d\n", __func__, status);
6273
6274 return status;
6275}
6276
fc931582
AA		 6277/*
6278 * Initialize the values to be used by the client in CREATE_SESSION
6279 * If nfs4_init_session set the fore channel request and response sizes,
6280 * use them.
6281 *
6282 * Set the back channel max_resp_sz_cached to zero to force the client to
6283 * always set csa_cachethis to FALSE because the current implementation
6284 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6285 */
6286static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6287{
18aad3d5
AA		 6288 unsigned int max_rqst_sz, max_resp_sz;
6289
6290 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6291 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6292
fc931582 6293 /* Fore channel attributes */
18aad3d5
AA		 6294 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6295 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6296 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6297 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6298
6299 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6300 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6301 __func__,
6302 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6303 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6304
6305 /* Back channel attributes */
fc931582
AA		 6306 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6307 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6308 args->bc_attrs.max_resp_sz_cached = 0;
6309 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6310 args->bc_attrs.max_reqs = 1;
6311
6312 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6313 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6314 __func__,
6315 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6316 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6317 args->bc_attrs.max_reqs);
6318}
6319
43c2e885 6320static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6321{
43c2e885
BF		 6322 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6323 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6324
43c2e885
BF		 6325 if (rcvd->max_resp_sz > sent->max_resp_sz)
6326 return -EINVAL;
6327 /*
6328 * Our requested max_ops is the minimum we need; we're not
6329 * prepared to break up compounds into smaller pieces than that.
6330 * So, no point even trying to continue if the server won't
6331 * cooperate:
6332 */
6333 if (rcvd->max_ops < sent->max_ops)
6334 return -EINVAL;
6335 if (rcvd->max_reqs == 0)
6336 return -EINVAL;
b4b9a0c1
VG		 6337 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6338 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6339 return 0;
8d35301d
AA		 6340}
6341
43c2e885
BF		 6342static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6343{
6344 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6345 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6346
43c2e885
BF		 6347 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6348 return -EINVAL;
6349 if (rcvd->max_resp_sz < sent->max_resp_sz)
6350 return -EINVAL;
6351 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6352 return -EINVAL;
6353 /* These would render the backchannel useless: */
b4b9a0c1 6354 if (rcvd->max_ops != sent->max_ops)
43c2e885 6355 return -EINVAL;
b4b9a0c1 6356 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6357 return -EINVAL;
6358 return 0;
6359}
8d35301d 6360
8d35301d
AA		 6361static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6362 struct nfs4_session *session)
6363{
43c2e885 6364 int ret;
8d35301d 6365
43c2e885
BF		 6366 ret = nfs4_verify_fore_channel_attrs(args, session);
6367 if (ret)
6368 return ret;
6369 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6370}
6371
848f5bda
TM		 6372static int _nfs4_proc_create_session(struct nfs_client *clp,
6373 struct rpc_cred *cred)
fc931582
AA		 6374{
6375 struct nfs4_session *session = clp->cl_session;
6376 struct nfs41_create_session_args args = {
6377 .client = clp,
6378 .cb_program = NFS4_CALLBACK,
6379 };
6380 struct nfs41_create_session_res res = {
6381 .client = clp,
6382 };
6383 struct rpc_message msg = {
6384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6385 .rpc_argp = &args,
6386 .rpc_resp = &res,
848f5bda 6387 .rpc_cred = cred,
fc931582
AA		 6388 };
6389 int status;
6390
6391 nfs4_init_channel_attrs(&args);
0f91421e 6392 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6393
1bd714f2 6394 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6395 trace_nfs4_create_session(clp, status);
fc931582 6396
43095d39 6397 if (!status) {
8d35301d
AA		 6398 /* Verify the session's negotiated channel_attrs values */
6399 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6400 /* Increment the clientid slot sequence id */
6401 clp->cl_seqid++;
6402 }
6403
6404 return status;
6405}
6406
6407/*
6408 * Issues a CREATE_SESSION operation to the server.
6409 * It is the responsibility of the caller to verify the session is
6410 * expired before calling this routine.
6411 */
848f5bda 6412int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6413{
6414 int status;
6415 unsigned *ptr;
fc931582
AA		 6416 struct nfs4_session *session = clp->cl_session;
6417
6418 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6419
848f5bda 6420 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6421 if (status)
6422 goto out;
6423
aacd5537
AA		 6424 /* Init or reset the session slot tables */
6425 status = nfs4_setup_session_slot_tables(session);
6426 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6427 if (status)
6428 goto out;
6429
6430 ptr = (unsigned *)&session->sess_id.data[0];
6431 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6432 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6433out:
6434 dprintk("<-- %s\n", __func__);
6435 return status;
6436}
6437
0f3e66c6
AA		 6438/*
6439 * Issue the over-the-wire RPC DESTROY_SESSION.
6440 * The caller must serialize access to this routine.
6441 */
848f5bda
TM		 6442int nfs4_proc_destroy_session(struct nfs4_session *session,
6443 struct rpc_cred *cred)
0f3e66c6 6444{
848f5bda
TM		 6445 struct rpc_message msg = {
6446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6447 .rpc_argp = session,
6448 .rpc_cred = cred,
6449 };
0f3e66c6 6450 int status = 0;
0f3e66c6
AA		 6451
6452 dprintk("--> nfs4_proc_destroy_session\n");
6453
6454 /* session is still being setup */
6455 if (session->clp->cl_cons_state != NFS_CS_READY)
6456 return status;
6457
1bd714f2 6458 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6459 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6460
6461 if (status)
08106ac7 6462 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6463 "Session has been destroyed regardless...\n", status);
6464
6465 dprintk("<-- nfs4_proc_destroy_session\n");
6466 return status;
6467}
6468
fc01cea9
AA		 6469/*
6470 * Renew the cl_session lease.
6471 */
d5f8d3fe
TM		 6472struct nfs4_sequence_data {
6473 struct nfs_client *clp;
6474 struct nfs4_sequence_args args;
6475 struct nfs4_sequence_res res;
6476};
6477
dc96aef9
AB		 6478static void nfs41_sequence_release(void *data)
6479{
d5f8d3fe
TM		 6480 struct nfs4_sequence_data *calldata = data;
6481 struct nfs_client *clp = calldata->clp;
dc96aef9 6482
7135840f
AB		 6483 if (atomic_read(&clp->cl_count) > 1)
6484 nfs4_schedule_state_renewal(clp);
6485 nfs_put_client(clp);
d5f8d3fe 6486 kfree(calldata);
dc96aef9
AB		 6487}
6488
aa5190d0
TM		 6489static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6490{
6491 switch(task->tk_status) {
6492 case -NFS4ERR_DELAY:
aa5190d0
TM		 6493 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6494 return -EAGAIN;
6495 default:
0400a6b0 6496 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6497 }
6498 return 0;
6499}
6500
dc96aef9 6501static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6502{
d5f8d3fe
TM		 6503 struct nfs4_sequence_data *calldata = data;
6504 struct nfs_client *clp = calldata->clp;
fc01cea9 6505
14516c3a
TM		 6506 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6507 return;
fc01cea9 6508
c6d01c6f 6509 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6510 if (task->tk_status < 0) {
6511 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6512 if (atomic_read(&clp->cl_count) == 1)
6513 goto out;
fc01cea9 6514
aa5190d0
TM		 6515 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6516 rpc_restart_call_prepare(task);
fc01cea9
AA		 6517 return;
6518 }
6519 }
fc01cea9 6520 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6521out:
fc01cea9
AA		 6522 dprintk("<-- %s\n", __func__);
6523}
6524
6525static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6526{
d5f8d3fe
TM		 6527 struct nfs4_sequence_data *calldata = data;
6528 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6529 struct nfs4_sequence_args *args;
6530 struct nfs4_sequence_res *res;
6531
fc01cea9
AA		 6532 args = task->tk_msg.rpc_argp;
6533 res = task->tk_msg.rpc_resp;
6534
d9afbd1b 6535 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6536}
6537
6538static const struct rpc_call_ops nfs41_sequence_ops = {
6539 .rpc_call_done = nfs41_sequence_call_done,
6540 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6541 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6542};
6543
8fe72bac
TM		 6544static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6545 struct rpc_cred *cred,
6546 bool is_privileged)
fc01cea9 6547{
d5f8d3fe 6548 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6549 struct rpc_message msg = {
6550 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6551 .rpc_cred = cred,
6552 };
71ac6da9
TM		 6553 struct rpc_task_setup task_setup_data = {
6554 .rpc_client = clp->cl_rpcclient,
6555 .rpc_message = &msg,
8fe72bac 6556 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6557 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6558 };
fc01cea9 6559
7135840f 6560 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6561 return ERR_PTR(-EIO);
dfb4f309 6562 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6563 if (calldata == NULL) {
7135840f 6564 nfs_put_client(clp);
71ac6da9 6565 return ERR_PTR(-ENOMEM);
fc01cea9 6566 }
9d12b216 6567 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6568 if (is_privileged)
6569 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6570 msg.rpc_argp = &calldata->args;
6571 msg.rpc_resp = &calldata->res;
6572 calldata->clp = clp;
71ac6da9 6573 task_setup_data.callback_data = calldata;
fc01cea9 6574
71ac6da9
TM		 6575 return rpc_run_task(&task_setup_data);
6576}
6577
2f60ea6b 6578static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6579{
6580 struct rpc_task *task;
6581 int ret = 0;
6582
2f60ea6b
TM		 6583 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6584 return 0;
8fe72bac 6585 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6586 if (IS_ERR(task))
6587 ret = PTR_ERR(task);
6588 else
bf294b41 6589 rpc_put_task_async(task);
71ac6da9
TM		 6590 dprintk("<-- %s status=%d\n", __func__, ret);
6591 return ret;
6592}
6593
6594static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6595{
6596 struct rpc_task *task;
6597 int ret;
6598
8fe72bac 6599 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6600 if (IS_ERR(task)) {
6601 ret = PTR_ERR(task);
6602 goto out;
6603 }
6604 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6605 if (!ret) {
6606 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6607
6608 if (task->tk_status == 0)
6609 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6610 ret = task->tk_status;
b4410c2f 6611 }
71ac6da9
TM		 6612 rpc_put_task(task);
6613out:
6614 dprintk("<-- %s status=%d\n", __func__, ret);
6615 return ret;
fc01cea9
AA		 6616}
6617
fce5c838
RL		 6618struct nfs4_reclaim_complete_data {
6619 struct nfs_client *clp;
6620 struct nfs41_reclaim_complete_args arg;
6621 struct nfs41_reclaim_complete_res res;
6622};
6623
6624static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6625{
6626 struct nfs4_reclaim_complete_data *calldata = data;
6627
d9afbd1b
TM		 6628 nfs41_setup_sequence(calldata->clp->cl_session,
6629 &calldata->arg.seq_args,
6630 &calldata->res.seq_res,
6631 task);
fce5c838
RL		 6632}
6633
aa5190d0
TM		 6634static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6635{
6636 switch(task->tk_status) {
6637 case 0:
6638 case -NFS4ERR_COMPLETE_ALREADY:
6639 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6640 break;
6641 case -NFS4ERR_DELAY:
aa5190d0 6642 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6643 /* fall through */
6644 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6645 return -EAGAIN;
6646 default:
0400a6b0 6647 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6648 }
6649 return 0;
6650}
6651
fce5c838
RL		 6652static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6653{
6654 struct nfs4_reclaim_complete_data *calldata = data;
6655 struct nfs_client *clp = calldata->clp;
6656 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6657
6658 dprintk("--> %s\n", __func__);
14516c3a
TM		 6659 if (!nfs41_sequence_done(task, res))
6660 return;
fce5c838 6661
c6d01c6f 6662 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6663 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6664 rpc_restart_call_prepare(task);
6665 return;
6666 }
fce5c838
RL		 6667 dprintk("<-- %s\n", __func__);
6668}
6669
6670static void nfs4_free_reclaim_complete_data(void *data)
6671{
6672 struct nfs4_reclaim_complete_data *calldata = data;
6673
6674 kfree(calldata);
6675}
6676
6677static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6678 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6679 .rpc_call_done = nfs4_reclaim_complete_done,
6680 .rpc_release = nfs4_free_reclaim_complete_data,
6681};
6682
6683/*
6684 * Issue a global reclaim complete.
6685 */
965e9c23
TM		 6686static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6687 struct rpc_cred *cred)
fce5c838
RL		 6688{
6689 struct nfs4_reclaim_complete_data *calldata;
6690 struct rpc_task *task;
6691 struct rpc_message msg = {
6692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6693 .rpc_cred = cred,
fce5c838
RL		 6694 };
6695 struct rpc_task_setup task_setup_data = {
6696 .rpc_client = clp->cl_rpcclient,
6697 .rpc_message = &msg,
6698 .callback_ops = &nfs4_reclaim_complete_call_ops,
6699 .flags = RPC_TASK_ASYNC,
6700 };
6701 int status = -ENOMEM;
6702
6703 dprintk("--> %s\n", __func__);
8535b2be 6704 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6705 if (calldata == NULL)
6706 goto out;
6707 calldata->clp = clp;
6708 calldata->arg.one_fs = 0;
fce5c838 6709
9d12b216 6710 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6711 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6712 msg.rpc_argp = &calldata->arg;
6713 msg.rpc_resp = &calldata->res;
6714 task_setup_data.callback_data = calldata;
6715 task = rpc_run_task(&task_setup_data);
acf82b85 6716 if (IS_ERR(task)) {
fce5c838 6717 status = PTR_ERR(task);
acf82b85
DC		 6718 goto out;
6719 }
c34c32ea
AA		 6720 status = nfs4_wait_for_completion_rpc_task(task);
6721 if (status == 0)
6722 status = task->tk_status;
fce5c838 6723 rpc_put_task(task);
acf82b85 6724 return 0;
fce5c838
RL		 6725out:
6726 dprintk("<-- %s status=%d\n", __func__, status);
6727 return status;
6728}
b1f69b75
AA		 6729
6730static void
6731nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6732{
6733 struct nfs4_layoutget *lgp = calldata;
c31663d4 6734 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6735 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6736
6737 dprintk("--> %s\n", __func__);
c31663d4
FI		 6738 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6739 * right now covering the LAYOUTGET we are about to send.
6740 * However, that is not so catastrophic, and there seems
6741 * to be no way to prevent it completely.
6742 */
6ba7db34 6743 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6744 &lgp->res.seq_res, task))
b1f69b75 6745 return;
cf7d63f1
FI		 6746 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6747 NFS_I(lgp->args.inode)->layout,
6748 lgp->args.ctx->state)) {
6749 rpc_exit(task, NFS4_OK);
cf7d63f1 6750 }
b1f69b75
AA		 6751}
6752
6753static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6754{
6755 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6756 struct inode *inode = lgp->args.inode;
6757 struct nfs_server *server = NFS_SERVER(inode);
6758 struct pnfs_layout_hdr *lo;
6759 struct nfs4_state *state = NULL;
30005121 6760 unsigned long timeo, giveup;
b1f69b75
AA		 6761
6762 dprintk("--> %s\n", __func__);
6763
6ba7db34 6764 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6765 goto out;
b1f69b75
AA		 6766
6767 switch (task->tk_status) {
6768 case 0:
ee314c2a 6769 goto out;
b1f69b75
AA		 6770 case -NFS4ERR_LAYOUTTRYLATER:
6771 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6772 timeo = rpc_get_timeout(task->tk_client);
6773 giveup = lgp->args.timestamp + timeo;
6774 if (time_after(giveup, jiffies))
6775 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6776 break;
6777 case -NFS4ERR_EXPIRED:
6778 case -NFS4ERR_BAD_STATEID:
6779 spin_lock(&inode->i_lock);
6780 lo = NFS_I(inode)->layout;
6781 if (!lo || list_empty(&lo->plh_segs)) {
6782 spin_unlock(&inode->i_lock);
6783 /* If the open stateid was bad, then recover it. */
6784 state = lgp->args.ctx->state;
6785 } else {
6786 LIST_HEAD(head);
6787
6788 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6789 spin_unlock(&inode->i_lock);
6790 /* Mark the bad layout state as invalid, then
6791 * retry using the open stateid. */
6792 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6793 }
6794 }
ee314c2a
TM		 6795 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6796 rpc_restart_call_prepare(task);
6797out:
b1f69b75
AA		 6798 dprintk("<-- %s\n", __func__);
6799}
6800
8554116e
IK		 6801static size_t max_response_pages(struct nfs_server *server)
6802{
6803 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6804 return nfs_page_array_len(0, max_resp_sz);
6805}
6806
6807static void nfs4_free_pages(struct page **pages, size_t size)
6808{
6809 int i;
6810
6811 if (!pages)
6812 return;
6813
6814 for (i = 0; i < size; i++) {
6815 if (!pages[i])
6816 break;
6817 __free_page(pages[i]);
6818 }
6819 kfree(pages);
6820}
6821
6822static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6823{
6824 struct page **pages;
6825 int i;
6826
6827 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6828 if (!pages) {
6829 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6830 return NULL;
6831 }
6832
6833 for (i = 0; i < size; i++) {
6834 pages[i] = alloc_page(gfp_flags);
6835 if (!pages[i]) {
6836 dprintk("%s: failed to allocate page\n", __func__);
6837 nfs4_free_pages(pages, size);
6838 return NULL;
6839 }
6840 }
6841
6842 return pages;
6843}
6844
b1f69b75
AA		 6845static void nfs4_layoutget_release(void *calldata)
6846{
6847 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6848 struct inode *inode = lgp->args.inode;
6849 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6850 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6851
6852 dprintk("--> %s\n", __func__);
8554116e 6853 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6854 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6855 put_nfs_open_context(lgp->args.ctx);
6856 kfree(calldata);
6857 dprintk("<-- %s\n", __func__);
6858}
6859
6860static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6861 .rpc_call_prepare = nfs4_layoutget_prepare,
6862 .rpc_call_done = nfs4_layoutget_done,
6863 .rpc_release = nfs4_layoutget_release,
6864};
6865
a0b0a6e3
TM		 6866struct pnfs_layout_segment *
6867nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6868{
a47970ff
WAA		 6869 struct inode *inode = lgp->args.inode;
6870 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6871 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6872 struct rpc_task *task;
6873 struct rpc_message msg = {
6874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6875 .rpc_argp = &lgp->args,
6876 .rpc_resp = &lgp->res,
6ab59344 6877 .rpc_cred = lgp->cred,
b1f69b75
AA		 6878 };
6879 struct rpc_task_setup task_setup_data = {
6880 .rpc_client = server->client,
6881 .rpc_message = &msg,
6882 .callback_ops = &nfs4_layoutget_call_ops,
6883 .callback_data = lgp,
6884 .flags = RPC_TASK_ASYNC,
6885 };
a0b0a6e3 6886 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6887 int status = 0;
6888
6889 dprintk("--> %s\n", __func__);
6890
8554116e
IK		 6891 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6892 if (!lgp->args.layout.pages) {
6893 nfs4_layoutget_release(lgp);
a0b0a6e3 6894 return ERR_PTR(-ENOMEM);
8554116e
IK		 6895 }
6896 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6897 lgp->args.timestamp = jiffies;
8554116e 6898
35124a09 6899 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6900 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6901 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6902
6903 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6904 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6905
b1f69b75
AA		 6906 task = rpc_run_task(&task_setup_data);
6907 if (IS_ERR(task))
a0b0a6e3 6908 return ERR_CAST(task);
b1f69b75 6909 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6910 if (status == 0)
6911 status = task->tk_status;
1037e6ea
TM		 6912 trace_nfs4_layoutget(lgp->args.ctx,
6913 &lgp->args.range,
6914 &lgp->res.range,
6915 status);
085b7a45
WAA		 6916 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6917 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6918 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6919 rpc_put_task(task);
6920 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6921 if (status)
6922 return ERR_PTR(status);
6923 return lseg;
b1f69b75
AA		 6924}
6925
cbe82603
BH		 6926static void
6927nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6928{
6929 struct nfs4_layoutreturn *lrp = calldata;
6930
6931 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6932 nfs41_setup_sequence(lrp->clp->cl_session,
6933 &lrp->args.seq_args,
6934 &lrp->res.seq_res,
6935 task);
cbe82603
BH		 6936}
6937
6938static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6939{
6940 struct nfs4_layoutreturn *lrp = calldata;
6941 struct nfs_server *server;
6942
6943 dprintk("--> %s\n", __func__);
6944
6ba7db34 6945 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6946 return;
6947
6948 server = NFS_SERVER(lrp->args.inode);
6949 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6950 rpc_restart_call_prepare(task);
cbe82603
BH		 6951 return;
6952 }
cbe82603
BH		 6953 dprintk("<-- %s\n", __func__);
6954}
6955
6956static void nfs4_layoutreturn_release(void *calldata)
6957{
6958 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6959 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6960
6961 dprintk("--> %s\n", __func__);
849b286f
TM		 6962 spin_lock(&lo->plh_inode->i_lock);
6963 if (lrp->res.lrs_present)
6964 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6965 lo->plh_block_lgets--;
6966 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6967 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6968 kfree(calldata);
6969 dprintk("<-- %s\n", __func__);
6970}
6971
6972static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6973 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6974 .rpc_call_done = nfs4_layoutreturn_done,
6975 .rpc_release = nfs4_layoutreturn_release,
6976};
6977
6978int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6979{
6980 struct rpc_task *task;
6981 struct rpc_message msg = {
6982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6983 .rpc_argp = &lrp->args,
6984 .rpc_resp = &lrp->res,
9556000d 6985 .rpc_cred = lrp->cred,
cbe82603
BH		 6986 };
6987 struct rpc_task_setup task_setup_data = {
1771c577 6988 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 6989 .rpc_message = &msg,
6990 .callback_ops = &nfs4_layoutreturn_call_ops,
6991 .callback_data = lrp,
6992 };
6993 int status;
6994
6995 dprintk("--> %s\n", __func__);
9d12b216 6996 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6997 task = rpc_run_task(&task_setup_data);
6998 if (IS_ERR(task))
6999 return PTR_ERR(task);
7000 status = task->tk_status;
1037e6ea 7001 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7002 dprintk("<-- %s status=%d\n", __func__, status);
7003 rpc_put_task(task);
7004 return status;
7005}
7006
7f11d8d3
AA		 7007/*
7008 * Retrieve the list of Data Server devices from the MDS.
7009 */
7010static int _nfs4_getdevicelist(struct nfs_server *server,
7011 const struct nfs_fh *fh,
7012 struct pnfs_devicelist *devlist)
7013{
7014 struct nfs4_getdevicelist_args args = {
7015 .fh = fh,
7016 .layoutclass = server->pnfs_curr_ld->id,
7017 };
7018 struct nfs4_getdevicelist_res res = {
7019 .devlist = devlist,
7020 };
7021 struct rpc_message msg = {
7022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7023 .rpc_argp = &args,
7024 .rpc_resp = &res,
7025 };
7026 int status;
7027
7028 dprintk("--> %s\n", __func__);
7029 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7030 &res.seq_res, 0);
7031 dprintk("<-- %s status=%d\n", __func__, status);
7032 return status;
7033}
7034
7035int nfs4_proc_getdevicelist(struct nfs_server *server,
7036 const struct nfs_fh *fh,
7037 struct pnfs_devicelist *devlist)
7038{
7039 struct nfs4_exception exception = { };
7040 int err;
7041
7042 do {
7043 err = nfs4_handle_exception(server,
7044 _nfs4_getdevicelist(server, fh, devlist),
7045 &exception);
7046 } while (exception.retry);
7047
7048 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7049 err, devlist->num_devs);
7050
7051 return err;
7052}
7053EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7054
b1f69b75 7055static int
cd5875fe
TM		 7056_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7057 struct pnfs_device *pdev,
7058 struct rpc_cred *cred)
b1f69b75
AA		 7059{
7060 struct nfs4_getdeviceinfo_args args = {
7061 .pdev = pdev,
7062 };
7063 struct nfs4_getdeviceinfo_res res = {
7064 .pdev = pdev,
7065 };
7066 struct rpc_message msg = {
7067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7068 .rpc_argp = &args,
7069 .rpc_resp = &res,
cd5875fe 7070 .rpc_cred = cred,
b1f69b75
AA		 7071 };
7072 int status;
7073
7074 dprintk("--> %s\n", __func__);
7c513058 7075 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7076 dprintk("<-- %s status=%d\n", __func__, status);
7077
7078 return status;
7079}
7080
cd5875fe
TM		 7081int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7082 struct pnfs_device *pdev,
7083 struct rpc_cred *cred)
b1f69b75
AA		 7084{
7085 struct nfs4_exception exception = { };
7086 int err;
7087
7088 do {
7089 err = nfs4_handle_exception(server,
cd5875fe 7090 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7091 &exception);
7092 } while (exception.retry);
7093 return err;
7094}
7095EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7096
863a3c6c
AA		 7097static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7098{
7099 struct nfs4_layoutcommit_data *data = calldata;
7100 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7101 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7102
d9afbd1b
TM		 7103 nfs41_setup_sequence(session,
7104 &data->args.seq_args,
7105 &data->res.seq_res,
7106 task);
863a3c6c
AA		 7107}
7108
7109static void
7110nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7111{
7112 struct nfs4_layoutcommit_data *data = calldata;
7113 struct nfs_server *server = NFS_SERVER(data->args.inode);
7114
6ba7db34 7115 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7116 return;
7117
7118 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7119 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7120 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7121 case -NFS4ERR_BADLAYOUT: /* no layout */
7122 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7123 task->tk_status = 0;
e59d27e0
TM		 7124 break;
7125 case 0:
863a3c6c
AA		 7126 nfs_post_op_update_inode_force_wcc(data->args.inode,
7127 data->res.fattr);
e59d27e0
TM		 7128 break;
7129 default:
7130 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7131 rpc_restart_call_prepare(task);
7132 return;
7133 }
7134 }
863a3c6c
AA		 7135}
7136
7137static void nfs4_layoutcommit_release(void *calldata)
7138{
7139 struct nfs4_layoutcommit_data *data = calldata;
7140
db29c089 7141 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7142 put_rpccred(data->cred);
7143 kfree(data);
7144}
7145
7146static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7147 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7148 .rpc_call_done = nfs4_layoutcommit_done,
7149 .rpc_release = nfs4_layoutcommit_release,
7150};
7151
7152int
ef311537 7153nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7154{
7155 struct rpc_message msg = {
7156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7157 .rpc_argp = &data->args,
7158 .rpc_resp = &data->res,
7159 .rpc_cred = data->cred,
7160 };
7161 struct rpc_task_setup task_setup_data = {
7162 .task = &data->task,
7163 .rpc_client = NFS_CLIENT(data->args.inode),
7164 .rpc_message = &msg,
7165 .callback_ops = &nfs4_layoutcommit_ops,
7166 .callback_data = data,
7167 .flags = RPC_TASK_ASYNC,
7168 };
7169 struct rpc_task *task;
7170 int status = 0;
7171
7172 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7173 "lbw: %llu inode %lu\n",
7174 data->task.tk_pid, sync,
7175 data->args.lastbytewritten,
7176 data->args.inode->i_ino);
7177
9d12b216 7178 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7179 task = rpc_run_task(&task_setup_data);
7180 if (IS_ERR(task))
7181 return PTR_ERR(task);
ef311537 7182 if (sync == false)
863a3c6c
AA		 7183 goto out;
7184 status = nfs4_wait_for_completion_rpc_task(task);
7185 if (status != 0)
7186 goto out;
7187 status = task->tk_status;
1037e6ea 7188 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7189out:
7190 dprintk("%s: status %d\n", __func__, status);
7191 rpc_put_task(task);
7192 return status;
7193}
fca78d6d 7194
97431204
AA		 7195/**
7196 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7197 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7198 */
fca78d6d
BS		 7199static int
7200_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7201 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7202{
7203 struct nfs41_secinfo_no_name_args args = {
7204 .style = SECINFO_STYLE_CURRENT_FH,
7205 };
7206 struct nfs4_secinfo_res res = {
7207 .flavors = flavors,
7208 };
7209 struct rpc_message msg = {
7210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7211 .rpc_argp = &args,
7212 .rpc_resp = &res,
7213 };
97431204
AA		 7214 return nfs4_call_sync(server->nfs_client->cl_rpcclient, server, &msg,
7215 &args.seq_args, &res.seq_res, 0);
fca78d6d
BS		 7216}
7217
7218static int
7219nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7220 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7221{
7222 struct nfs4_exception exception = { };
7223 int err;
7224 do {
7225 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7226 switch (err) {
7227 case 0:
7228 case -NFS4ERR_WRONGSEC:
7229 case -NFS4ERR_NOTSUPP:
05e9cfb4 7230 goto out;
fca78d6d
BS		 7231 default:
7232 err = nfs4_handle_exception(server, err, &exception);
7233 }
7234 } while (exception.retry);
05e9cfb4 7235out:
fca78d6d
BS		 7236 return err;
7237}
7238
7239static int
7240nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7241 struct nfs_fsinfo *info)
7242{
7243 int err;
7244 struct page *page;
7245 rpc_authflavor_t flavor;
7246 struct nfs4_secinfo_flavors *flavors;
7247
7248 page = alloc_page(GFP_KERNEL);
7249 if (!page) {
7250 err = -ENOMEM;
7251 goto out;
7252 }
7253
7254 flavors = page_address(page);
7255 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7256
7257 /*
7258 * Fall back on "guess and check" method if
7259 * the server doesn't support SECINFO_NO_NAME
7260 */
7261 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7262 err = nfs4_find_root_sec(server, fhandle, info);
7263 goto out_freepage;
7264 }
7265 if (err)
7266 goto out_freepage;
7267
7268 flavor = nfs_find_best_sec(flavors);
7269 if (err == 0)
7270 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7271
7272out_freepage:
7273 put_page(page);
7274 if (err == -EACCES)
7275 return -EPERM;
7276out:
7277 return err;
7278}
1cab0652 7279
ab7cb0df
TM		 7280static int _nfs41_test_stateid(struct nfs_server *server,
7281 nfs4_stateid *stateid,
7282 struct rpc_cred *cred)
7d974794
BS		 7283{
7284 int status;
7285 struct nfs41_test_stateid_args args = {
1cab0652 7286 .stateid = stateid,
7d974794
BS		 7287 };
7288 struct nfs41_test_stateid_res res;
7289 struct rpc_message msg = {
7290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7291 .rpc_argp = &args,
7292 .rpc_resp = &res,
ab7cb0df 7293 .rpc_cred = cred,
7d974794 7294 };
1cab0652 7295
38527b15 7296 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 7297 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 7298 nfs4_set_sequence_privileged(&args.seq_args);
7299 status = nfs4_call_sync_sequence(server->client, server, &msg,
7300 &args.seq_args, &res.seq_res);
38527b15
CL		 7301 if (status != NFS_OK) {
7302 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7303 return status;
38527b15
CL		 7304 }
7305 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7306 return -res.status;
7d974794
BS		 7307}
7308
38527b15
CL		 7309/**
7310 * nfs41_test_stateid - perform a TEST_STATEID operation
7311 *
7312 * @server: server / transport on which to perform the operation
7313 * @stateid: state ID to test
ab7cb0df 7314 * @cred: credential
38527b15
CL		 7315 *
7316 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7317 * Otherwise a negative NFS4ERR value is returned if the operation
7318 * failed or the state ID is not currently valid.
7319 */
ab7cb0df
TM		 7320static int nfs41_test_stateid(struct nfs_server *server,
7321 nfs4_stateid *stateid,
7322 struct rpc_cred *cred)
7d974794
BS		 7323{
7324 struct nfs4_exception exception = { };
7325 int err;
7326 do {
ab7cb0df 7327 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7328 if (err != -NFS4ERR_DELAY)
7329 break;
7330 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7331 } while (exception.retry);
7332 return err;
7333}
9aeda35f 7334
7c1d5fae
TM		 7335struct nfs_free_stateid_data {
7336 struct nfs_server *server;
7337 struct nfs41_free_stateid_args args;
9aeda35f 7338 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7339};
7340
7341static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7342{
7343 struct nfs_free_stateid_data *data = calldata;
7344 nfs41_setup_sequence(nfs4_get_session(data->server),
7345 &data->args.seq_args,
7346 &data->res.seq_res,
7347 task);
7348}
7349
7350static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7351{
7352 struct nfs_free_stateid_data *data = calldata;
7353
7354 nfs41_sequence_done(task, &data->res.seq_res);
7355
7356 switch (task->tk_status) {
7357 case -NFS4ERR_DELAY:
7358 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7359 rpc_restart_call_prepare(task);
7360 }
7361}
7362
7363static void nfs41_free_stateid_release(void *calldata)
7364{
7365 kfree(calldata);
7366}
7367
17f26b12 7368static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7369 .rpc_call_prepare = nfs41_free_stateid_prepare,
7370 .rpc_call_done = nfs41_free_stateid_done,
7371 .rpc_release = nfs41_free_stateid_release,
7372};
7373
7374static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7375 nfs4_stateid *stateid,
ab7cb0df 7376 struct rpc_cred *cred,
7c1d5fae
TM		 7377 bool privileged)
7378{
9aeda35f
BS		 7379 struct rpc_message msg = {
7380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7381 .rpc_cred = cred,
9aeda35f 7382 };
7c1d5fae
TM		 7383 struct rpc_task_setup task_setup = {
7384 .rpc_client = server->client,
7385 .rpc_message = &msg,
7386 .callback_ops = &nfs41_free_stateid_ops,
7387 .flags = RPC_TASK_ASYNC,
7388 };
7389 struct nfs_free_stateid_data *data;
9aeda35f 7390
38527b15 7391 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7392 data = kmalloc(sizeof(*data), GFP_NOFS);
7393 if (!data)
7394 return ERR_PTR(-ENOMEM);
7395 data->server = server;
7396 nfs4_stateid_copy(&data->args.stateid, stateid);
7397
7398 task_setup.callback_data = data;
7399
7400 msg.rpc_argp = &data->args;
7401 msg.rpc_resp = &data->res;
7402 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7403 if (privileged)
7404 nfs4_set_sequence_privileged(&data->args.seq_args);
7405
7406 return rpc_run_task(&task_setup);
9aeda35f
BS		 7407}
7408
38527b15
CL		 7409/**
7410 * nfs41_free_stateid - perform a FREE_STATEID operation
7411 *
7412 * @server: server / transport on which to perform the operation
7413 * @stateid: state ID to release
ab7cb0df 7414 * @cred: credential
38527b15
CL		 7415 *
7416 * Returns NFS_OK if the server freed "stateid". Otherwise a
7417 * negative NFS4ERR value is returned.
7418 */
ab7cb0df
TM		 7419static int nfs41_free_stateid(struct nfs_server *server,
7420 nfs4_stateid *stateid,
7421 struct rpc_cred *cred)
9aeda35f 7422{
7c1d5fae
TM		 7423 struct rpc_task *task;
7424 int ret;
7425
ab7cb0df 7426 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7427 if (IS_ERR(task))
7428 return PTR_ERR(task);
7429 ret = rpc_wait_for_completion_task(task);
7430 if (!ret)
7431 ret = task->tk_status;
7432 rpc_put_task(task);
7433 return ret;
9aeda35f 7434}
36281caa 7435
c8b2d0bf
TM		 7436static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7437{
7438 struct rpc_task *task;
ab7cb0df 7439 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7440
ab7cb0df 7441 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7442 nfs4_free_lock_state(server, lsp);
7443 if (IS_ERR(task))
7444 return PTR_ERR(task);
7445 rpc_put_task(task);
7446 return 0;
7447}
7448
36281caa
TM		 7449static bool nfs41_match_stateid(const nfs4_stateid *s1,
7450 const nfs4_stateid *s2)
7451{
2d2f24ad 7452 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7453 return false;
7454
2d2f24ad 7455 if (s1->seqid == s2->seqid)
36281caa 7456 return true;
2d2f24ad 7457 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7458 return true;
7459
7460 return false;
7461}
7462
557134a3
AA		 7463#endif /* CONFIG_NFS_V4_1 */
7464
36281caa
TM		 7465static bool nfs4_match_stateid(const nfs4_stateid *s1,
7466 const nfs4_stateid *s2)
7467{
f597c537 7468 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7469}
7470
7471
17280175 7472static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7473 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7474 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7475 .recover_open = nfs4_open_reclaim,
7476 .recover_lock = nfs4_lock_reclaim,
591d71cb 7477 .establish_clid = nfs4_init_clientid,
05f4c350 7478 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7479};
7480
591d71cb 7481#if defined(CONFIG_NFS_V4_1)
17280175 7482static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7483 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7484 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7485 .recover_open = nfs4_open_reclaim,
7486 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7487 .establish_clid = nfs41_init_clientid,
fce5c838 7488 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7489 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7490};
7491#endif /* CONFIG_NFS_V4_1 */
7492
17280175 7493static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7494 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7495 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7496 .recover_open = nfs4_open_expired,
7497 .recover_lock = nfs4_lock_expired,
7498 .establish_clid = nfs4_init_clientid,
7499};
7500
7501#if defined(CONFIG_NFS_V4_1)
17280175 7502static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7503 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7504 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7505 .recover_open = nfs41_open_expired,
7506 .recover_lock = nfs41_lock_expired,
4d643d1d 7507 .establish_clid = nfs41_init_clientid,
1da177e4 7508};
591d71cb 7509#endif /* CONFIG_NFS_V4_1 */
1da177e4 7510
17280175 7511static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7512 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7513 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7514 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7515};
7516
7517#if defined(CONFIG_NFS_V4_1)
17280175 7518static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7519 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7520 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7521 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7522};
7523#endif
7524
97dc1359
TM		 7525static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7526 .minor_version = 0,
39c6daae
TM		 7527 .init_caps = NFS_CAP_READDIRPLUS
7528 | NFS_CAP_ATOMIC_OPEN
7529 | NFS_CAP_CHANGE_ATTR
7530 | NFS_CAP_POSIX_LOCK,
97dc1359 7531 .call_sync = _nfs4_call_sync,
36281caa 7532 .match_stateid = nfs4_match_stateid,
fca78d6d 7533 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7534 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7535 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7536 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7537 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7538};
7539
7540#if defined(CONFIG_NFS_V4_1)
7541static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7542 .minor_version = 1,
39c6daae
TM		 7543 .init_caps = NFS_CAP_READDIRPLUS
7544 | NFS_CAP_ATOMIC_OPEN
7545 | NFS_CAP_CHANGE_ATTR
3b66486c 7546 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7547 | NFS_CAP_STATEID_NFSV41
7548 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7549 .call_sync = nfs4_call_sync_sequence,
36281caa 7550 .match_stateid = nfs41_match_stateid,
fca78d6d 7551 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7552 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7553 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7554 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7555 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7556};
7557#endif
7558
42c2c424
SD		 7559#if defined(CONFIG_NFS_V4_2)
7560static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7561 .minor_version = 2,
7017310a
BS		 7562 .init_caps = NFS_CAP_READDIRPLUS
7563 | NFS_CAP_ATOMIC_OPEN
7564 | NFS_CAP_CHANGE_ATTR
7565 | NFS_CAP_POSIX_LOCK
7566 | NFS_CAP_STATEID_NFSV41
7567 | NFS_CAP_ATOMIC_OPEN_V1,
42c2c424
SD		 7568 .call_sync = nfs4_call_sync_sequence,
7569 .match_stateid = nfs41_match_stateid,
7570 .find_root_sec = nfs41_find_root_sec,
7017310a 7571 .free_lock_state = nfs41_free_lock_state,
42c2c424
SD		 7572 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7573 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7574 .state_renewal_ops = &nfs41_state_renewal_ops,
7575};
7576#endif
7577
97dc1359
TM		 7578const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7579 [0] = &nfs_v4_0_minor_ops,
7580#if defined(CONFIG_NFS_V4_1)
7581 [1] = &nfs_v4_1_minor_ops,
7582#endif
42c2c424
SD		 7583#if defined(CONFIG_NFS_V4_2)
7584 [2] = &nfs_v4_2_minor_ops,
7585#endif
97dc1359
TM		 7586};
7587
17f26b12 7588static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7589 .create = nfs_create,
7590 .lookup = nfs_lookup,
7591 .atomic_open = nfs_atomic_open,
7592 .link = nfs_link,
7593 .unlink = nfs_unlink,
7594 .symlink = nfs_symlink,
7595 .mkdir = nfs_mkdir,
7596 .rmdir = nfs_rmdir,
7597 .mknod = nfs_mknod,
7598 .rename = nfs_rename,
7599 .permission = nfs_permission,
7600 .getattr = nfs_getattr,
7601 .setattr = nfs_setattr,
7602 .getxattr = generic_getxattr,
7603 .setxattr = generic_setxattr,
7604 .listxattr = generic_listxattr,
7605 .removexattr = generic_removexattr,
7606};
7607
92e1d5be 7608static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7609 .permission = nfs_permission,
7610 .getattr = nfs_getattr,
7611 .setattr = nfs_setattr,
64c2ce8b
AK		 7612 .getxattr = generic_getxattr,
7613 .setxattr = generic_setxattr,
7614 .listxattr = generic_listxattr,
7615 .removexattr = generic_removexattr,
6b3b5496
BF		 7616};
7617
509de811 7618const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7619 .version = 4, /* protocol version */
7620 .dentry_ops = &nfs4_dentry_operations,
7621 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7622 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7623 .file_ops = &nfs4_file_operations,
1da177e4 7624 .getroot = nfs4_proc_get_root,
281cad46 7625 .submount = nfs4_submount,
ff9099f2 7626 .try_mount = nfs4_try_mount,
1da177e4
LT		 7627 .getattr = nfs4_proc_getattr,
7628 .setattr = nfs4_proc_setattr,
7629 .lookup = nfs4_proc_lookup,
7630 .access = nfs4_proc_access,
7631 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7632 .create = nfs4_proc_create,
7633 .remove = nfs4_proc_remove,
7634 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7635 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7636 .unlink_done = nfs4_proc_unlink_done,
7637 .rename = nfs4_proc_rename,
d3d4152a 7638 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7639 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7640 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7641 .link = nfs4_proc_link,
7642 .symlink = nfs4_proc_symlink,
7643 .mkdir = nfs4_proc_mkdir,
7644 .rmdir = nfs4_proc_remove,
7645 .readdir = nfs4_proc_readdir,
7646 .mknod = nfs4_proc_mknod,
7647 .statfs = nfs4_proc_statfs,
7648 .fsinfo = nfs4_proc_fsinfo,
7649 .pathconf = nfs4_proc_pathconf,
e9326dca 7650 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7651 .decode_dirent = nfs4_decode_dirent,
7652 .read_setup = nfs4_proc_read_setup,
1abb5088 7653 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7654 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7655 .read_done = nfs4_read_done,
1da177e4 7656 .write_setup = nfs4_proc_write_setup,
57208fa7 7657 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7658 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7659 .write_done = nfs4_write_done,
1da177e4 7660 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7661 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7662 .commit_done = nfs4_commit_done,
1da177e4 7663 .lock = nfs4_proc_lock,
e50a1c2e 7664 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7665 .close_context = nfs4_close_context,
2b484297 7666 .open_context = nfs4_atomic_open,
011e2a7f 7667 .have_delegation = nfs4_have_delegation,
57ec14c5 7668 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7669 .alloc_client = nfs4_alloc_client,
45a52a02 7670 .init_client = nfs4_init_client,
cdb7eced 7671 .free_client = nfs4_free_client,
1179acc6
BS		 7672 .create_server = nfs4_create_server,
7673 .clone_server = nfs_clone_server,
1da177e4
LT		 7674};
7675
64c2ce8b
AK		 7676static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7677 .prefix = XATTR_NAME_NFSV4_ACL,
7678 .list = nfs4_xattr_list_nfs4_acl,
7679 .get = nfs4_xattr_get_nfs4_acl,
7680 .set = nfs4_xattr_set_nfs4_acl,
7681};
7682
7683const struct xattr_handler *nfs4_xattr_handlers[] = {
7684 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 7685#ifdef CONFIG_NFS_V4_SECURITY_LABEL
7686 &nfs4_xattr_nfs4_label_handler,
7687#endif
64c2ce8b
AK		 7688 NULL
7689};
7690
1da177e4
LT		 7691/*
7692 * Local variables:
7693 * c-basic-offset: 8
7694 * End:
7695 */
Linux 6.x block layer and io_uring tree(s)