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NFSv4.1/flexfiles: Mark layout for return if the mirrors are invalid
[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>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.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"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
5ba12443
TM		 359 case -NFS4ERR_DELEG_REVOKED:
360 case -NFS4ERR_ADMIN_REVOKED:
361 case -NFS4ERR_BAD_STATEID:
011e2a7f 362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 363 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 364 exception->retry = 1;
365 return 0;
366 }
367 if (state == NULL)
368 break;
5d422301
TM		 369 ret = nfs4_schedule_stateid_recovery(server, state);
370 if (ret < 0)
371 break;
3114ea7a 372 goto wait_on_recovery;
0ced63d1 373 case -NFS4ERR_EXPIRED:
5d422301
TM		 374 if (state != NULL) {
375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
378 }
65de872e 379 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 380 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 381 nfs4_schedule_lease_recovery(clp);
382 goto wait_on_recovery;
519ae255
CL		 383 case -NFS4ERR_MOVED:
384 ret = nfs4_schedule_migration_recovery(server);
385 if (ret < 0)
386 break;
387 goto wait_on_recovery;
8ef2f8d4
CL		 388 case -NFS4ERR_LEASE_MOVED:
389 nfs4_schedule_lease_moved_recovery(clp);
390 goto wait_on_recovery;
03391693 391#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 392 case -NFS4ERR_BADSESSION:
393 case -NFS4ERR_BADSLOT:
394 case -NFS4ERR_BAD_HIGH_SLOT:
395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
396 case -NFS4ERR_DEADSESSION:
397 case -NFS4ERR_SEQ_FALSE_RETRY:
398 case -NFS4ERR_SEQ_MISORDERED:
399 dprintk("%s ERROR: %d Reset session\n", __func__,
400 errorcode);
9f594791 401 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 402 goto wait_on_recovery;
03391693 403#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 404 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 405 if (exception->timeout > HZ) {
406 /* We have retried a decent amount, time to
407 * fail
408 */
409 ret = -EBUSY;
410 break;
411 }
65de872e
TM		 412 case -NFS4ERR_GRACE:
413 case -NFS4ERR_DELAY:
414 ret = nfs4_delay(server->client, &exception->timeout);
415 if (ret != 0)
416 break;
a8a4ae3a 417 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 418 case -NFS4ERR_OLD_STATEID:
419 exception->retry = 1;
b064eca2
TM		 420 break;
421 case -NFS4ERR_BADOWNER:
422 /* The following works around a Linux server bug! */
423 case -NFS4ERR_BADNAME:
424 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
425 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
426 exception->retry = 1;
427 printk(KERN_WARNING "NFS: v4 server %s "
428 "does not accept raw "
429 "uid/gids. "
430 "Reenabling the idmapper.\n",
431 server->nfs_client->cl_hostname);
432 }
65de872e
TM		 433 }
434 /* We failed to handle the error */
435 return nfs4_map_errors(ret);
0400a6b0 436wait_on_recovery:
a2c0b9e2 437 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 438 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
439 return -EIO;
a2c0b9e2
TM		 440 if (ret == 0)
441 exception->retry = 1;
442 return ret;
65de872e
TM		 443}
444
a5250def
WAA		 445/*
446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
447 * or 'false' otherwise.
448 */
449static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
450{
451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
452
453 if (flavor == RPC_AUTH_GSS_KRB5I ||
454 flavor == RPC_AUTH_GSS_KRB5P)
455 return true;
456
457 return false;
458}
65de872e 459
452e9352 460static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 461{
1da177e4
LT		 462 spin_lock(&clp->cl_lock);
463 if (time_before(clp->cl_last_renewal,timestamp))
464 clp->cl_last_renewal = timestamp;
465 spin_unlock(&clp->cl_lock);
466}
467
452e9352
TM		 468static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
469{
be824167
TM		 470 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
452e9352
TM		 474}
475
2a3eb2b9
CL		 476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
be3a5d23
TM		 482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
cb04ad2a
PT		 497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
3bd2384a 501{
3bd2384a
CL		 502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
cb04ad2a 536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
cab92c19 544 if (slot == NULL)
3bd2384a
CL		 545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
cccef3b9
AA		 558#if defined(CONFIG_NFS_V4_1)
559
d185a334 560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 561{
e3725ec0 562 struct nfs4_session *session;
13615871 563 struct nfs4_slot_table *tbl;
a13ce7c6 564 struct nfs4_slot *slot = res->sr_slot;
c10e4498 565 bool send_new_highest_used_slotid = false;
13615871 566
a13ce7c6 567 tbl = slot->table;
e3725ec0 568 session = tbl->session;
ea028ac9 569
35dc1d74 570 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
a13ce7c6 577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
a13ce7c6 581 nfs4_free_slot(tbl, slot);
c10e4498
TM		 582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
b75ad4cd 585out_unlock:
35dc1d74 586 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 587 res->sr_slot = NULL;
c10e4498 588 if (send_new_highest_used_slotid)
3f10a6af 589 nfs41_notify_server(session->clp);
13615871
AA		 590}
591
f9c96fcc 592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 593{
e3725ec0 594 struct nfs4_session *session;
a13ce7c6 595 struct nfs4_slot *slot = res->sr_slot;
14516c3a 596 struct nfs_client *clp;
ac20d163 597 bool interrupted = false;
85563073 598 int ret = 1;
b0df806c 599
a13ce7c6
TM		 600 if (slot == NULL)
601 goto out_noaction;
468f8613
BS		 602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
b0df806c
AA		 604 goto out;
605
e3725ec0 606 session = slot->table->session;
933602e3 607
ac20d163
TM		 608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
2f92ae34 613 trace_nfs4_sequence_done(session, res);
691daf3b 614 /* Check the SEQUENCE operation status */
14516c3a
TM		 615 switch (res->sr_status) {
616 case 0:
b0df806c 617 /* Update the slot's sequence and clientid lease timer */
933602e3 618 ++slot->seq_nr;
e3725ec0 619 clp = session->clp;
8e63b6a8 620 do_renew_lease(clp, res->sr_timestamp);
0629e370 621 /* Check sequence flags */
b15c7cdd 622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 623 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 624 break;
ac20d163
TM		 625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
14516c3a
TM		 634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
df2fabff 639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 640 __func__,
df2fabff 641 slot->slot_nr,
933602e3 642 slot->seq_nr);
14516c3a 643 goto out_retry;
85563073
TM		 644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
e8794440
TM		 649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
e8794440
TM		 659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
8e63b6a8
TM		 663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
e8794440
TM		 668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
14516c3a
TM		 671 default:
672 /* Just update the slot sequence no. */
933602e3 673 ++slot->seq_nr;
b0df806c
AA		 674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 678 nfs41_sequence_free_slot(res);
a13ce7c6 679out_noaction:
85563073 680 return ret;
e8794440
TM		 681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
14516c3a 687out_retry:
d05dd4e9 688 if (!rpc_restart_call(task))
14516c3a
TM		 689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
b0df806c 692}
f9c96fcc 693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 694
2c4b131d 695int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455 702}
2c4b131d 703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 704
dc70d7b3 705int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
ce5039c1
AA		 708 struct rpc_task *task)
709{
fbcd4abc
AA		 710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 712
713 dprintk("--> %s\n", __func__);
ce5039c1 714 /* slot already allocated? */
dfb4f309 715 if (res->sr_slot != NULL)
d9afbd1b 716 goto out_success;
ce5039c1 717
fbcd4abc
AA		 718 tbl = &session->fc_slot_table;
719
69d206b5
TM		 720 task->tk_timeout = 0;
721
fbcd4abc 722 spin_lock(&tbl->slot_tbl_lock);
774d5f14 723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 724 !args->sa_privileged) {
0b1c8fc4 725 /* The state manager will wait until the slot table is empty */
0b1c8fc4 726 dprintk("%s session is draining\n", __func__);
7b939a3f 727 goto out_sleep;
689cf5c1
AB		 728 }
729
2dc03b7f 730 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
fbcd4abc 735 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 736 goto out_sleep;
fbcd4abc
AA		 737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
2b2fa717 740 args->sa_slot = slot;
fbcd4abc 741
e8d92382 742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 743 slot->slot_nr, slot->seq_nr);
fbcd4abc 744
dfb4f309 745 res->sr_slot = slot;
8e63b6a8 746 res->sr_timestamp = jiffies;
2a6e26cd 747 res->sr_status_flags = 0;
fbcd4abc
AA		 748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
2f92ae34 753 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 754out_success:
755 rpc_call_start(task);
ce5039c1 756 return 0;
7b939a3f 757out_sleep:
8fe72bac
TM		 758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
1e1093c7
TM		 760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
ce5039c1 766}
dc70d7b3 767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 768
5a580e0a
CL		 769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
ce5039c1 773{
035168ab 774 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 775 int ret = 0;
776
3bd2384a 777 if (!session)
cb04ad2a
PT		 778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
cb04ad2a
PT		 820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
9915ea7e
CL		 822}
823
2c4b131d
PT		 824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
9915ea7e 826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
2c4b131d 829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 830
831#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
7c513058
BS		 851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
ce5039c1
AA		 853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
8fe72bac 855 struct nfs4_sequence_res *res)
ce5039c1
AA		 856{
857 int ret;
858 struct rpc_task *task;
9915ea7e 859 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 860 struct nfs4_call_sync_data data = {
035168ab 861 .seq_server = server,
ce5039c1
AA		 862 .seq_args = args,
863 .seq_res = res,
ce5039c1
AA		 864 };
865 struct rpc_task_setup task_setup = {
7c513058 866 .rpc_client = clnt,
ce5039c1 867 .rpc_message = msg,
9915ea7e 868 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 869 .callback_data = &data
870 };
871
ce5039c1
AA		 872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
7c513058
BS		 882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
e73b83f2
BS		 884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
a9c92d6b 889 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 891}
cccef3b9 892
38478b24 893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 894{
38478b24 895 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 896
38478b24 897 spin_lock(&dir->i_lock);
359d7d1c 898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 899 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 900 nfs_force_lookup_revalidate(dir);
a9a4a87a 901 dir->i_version = cinfo->after;
3235b403 902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 903 nfs_fscache_invalidate(dir);
38478b24 904 spin_unlock(&dir->i_lock);
1da177e4
LT		 905}
906
e56e0b78 907struct nfs4_opendata {
c6d00e63 908 struct kref kref;
e56e0b78
TM		 909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
cdd4e68b
TM		 911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
6926afd1
TM		 913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
a49c2691 915 struct nfs4_label *a_label;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
6ae37339
TM		 943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
49f9a0fa
TM		 968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
2ced46c2
TM		 985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
1775fd3e 989 p->o_res.f_label = p->f_label;
c1d51931
TM		 990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 992 p->o_res.server = p->o_arg.server;
5f657530 993 p->o_res.access_request = p->o_arg.access;
2ced46c2 994 nfs_fattr_init(&p->f_attr);
6926afd1 995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 996}
997
82a2c1b7 998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1000 const struct iattr *attrs,
1775fd3e 1001 struct nfs4_label *label,
4a1c0893 1002 enum open_claim_type4 claim,
8535b2be 1003 gfp_t gfp_mask)
e56e0b78 1004{
82a2c1b7 1005 struct dentry *parent = dget_parent(dentry);
2b0143b5 1006 struct inode *dir = d_inode(parent);
e56e0b78 1007 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1009 struct nfs4_opendata *p;
1010
8535b2be 1011 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1012 if (p == NULL)
1013 goto err;
14c43f76
DQ		 1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
a49c2691
KM		 1019 p->a_label = nfs4_label_alloc(server, gfp_mask);
1020 if (IS_ERR(p->a_label))
1021 goto err_free_f;
1022
63f5f796
TM		 1023 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1024 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1025 if (IS_ERR(p->o_arg.seqid))
14c43f76 1026 goto err_free_label;
82a2c1b7
AV		 1027 nfs_sb_active(dentry->d_sb);
1028 p->dentry = dget(dentry);
e56e0b78
TM		 1029 p->dir = parent;
1030 p->owner = sp;
1031 atomic_inc(&sp->so_count);
dc0b027d
TM		 1032 p->o_arg.open_flags = flags;
1033 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1034 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 fmode, flags);
ae2bb032
WAA		 1036 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1037 * will return permission denied for all bits until close */
1038 if (!(flags & O_EXCL)) {
1039 /* ask server to check for all possible rights as results
1040 * are cached */
1041 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1042 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1043 }
7539bbab 1044 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1045 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1046 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1047 p->o_arg.name = &dentry->d_name;
e56e0b78 1048 p->o_arg.server = server;
aa9c2669 1049 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1050 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1051 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1052 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1053 switch (p->o_arg.claim) {
4a1c0893
TM		 1054 case NFS4_OPEN_CLAIM_NULL:
1055 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1056 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1057 p->o_arg.fh = NFS_FH(dir);
1058 break;
1059 case NFS4_OPEN_CLAIM_PREVIOUS:
1060 case NFS4_OPEN_CLAIM_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1062 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1063 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1064 }
536e43d1 1065 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1066 __u32 verf[2];
d77d76ff 1067
e56e0b78
TM		 1068 p->o_arg.u.attrs = &p->attrs;
1069 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1070
1071 verf[0] = jiffies;
1072 verf[1] = current->pid;
1073 memcpy(p->o_arg.u.verifier.data, verf,
1074 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1075 }
cdd4e68b
TM		 1076 p->c_arg.fh = &p->o_res.fh;
1077 p->c_arg.stateid = &p->o_res.stateid;
1078 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1079 nfs4_init_opendata_res(p);
c6d00e63 1080 kref_init(&p->kref);
e56e0b78 1081 return p;
14c43f76
DQ		 1082
1083err_free_label:
a49c2691
KM		 1084 nfs4_label_free(p->a_label);
1085err_free_f:
14c43f76
DQ		 1086 nfs4_label_free(p->f_label);
1087err_free_p:
e56e0b78
TM		 1088 kfree(p);
1089err:
1090 dput(parent);
1091 return NULL;
1092}
1093
c6d00e63 1094static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1095{
c6d00e63
TM		 1096 struct nfs4_opendata *p = container_of(kref,
1097 struct nfs4_opendata, kref);
82a2c1b7 1098 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1099
1100 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1101 if (p->state != NULL)
1102 nfs4_put_open_state(p->state);
c6d00e63 1103 nfs4_put_state_owner(p->owner);
14c43f76 1104
a49c2691 1105 nfs4_label_free(p->a_label);
14c43f76
DQ		 1106 nfs4_label_free(p->f_label);
1107
c6d00e63 1108 dput(p->dir);
82a2c1b7
AV		 1109 dput(p->dentry);
1110 nfs_sb_deactive(sb);
6926afd1 1111 nfs_fattr_free_names(&p->f_attr);
e911b815 1112 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1113 kfree(p);
1114}
1115
1116static void nfs4_opendata_put(struct nfs4_opendata *p)
1117{
1118 if (p != NULL)
1119 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1120}
1121
06f814a3
TM		 1122static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1123{
06f814a3
TM		 1124 int ret;
1125
06f814a3 1126 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1127 return ret;
1128}
1129
dc0b027d 1130static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1131{
1132 int ret = 0;
dc0b027d 1133
536e43d1 1134 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1135 goto out;
1136 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1137 case FMODE_READ:
88069f77
TM		 1138 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1139 && state->n_rdonly != 0;
6ee41268
TM		 1140 break;
1141 case FMODE_WRITE:
88069f77
TM		 1142 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1143 && state->n_wronly != 0;
6ee41268
TM		 1144 break;
1145 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1146 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1147 && state->n_rdwr != 0;
6ee41268 1148 }
dc0b027d 1149out:
6ee41268
TM		 1150 return ret;
1151}
1152
2a606188
TM		 1153static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1154 enum open_claim_type4 claim)
aac00a8d 1155{
652f89f6
TM		 1156 if (delegation == NULL)
1157 return 0;
dc0b027d 1158 if ((delegation->type & fmode) != fmode)
aac00a8d 1159 return 0;
d25be546
TM		 1160 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1161 return 0;
2a606188
TM		 1162 switch (claim) {
1163 case NFS4_OPEN_CLAIM_NULL:
1164 case NFS4_OPEN_CLAIM_FH:
1165 break;
1166 case NFS4_OPEN_CLAIM_PREVIOUS:
1167 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1168 break;
1169 default:
1170 return 0;
1171 }
b7391f44 1172 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1173 return 1;
1174}
1175
dc0b027d 1176static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1177{
dc0b027d 1178 switch (fmode) {
e7616923
TM		 1179 case FMODE_WRITE:
1180 state->n_wronly++;
1181 break;
1182 case FMODE_READ:
1183 state->n_rdonly++;
1184 break;
1185 case FMODE_READ|FMODE_WRITE:
1186 state->n_rdwr++;
1187 }
dc0b027d 1188 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1189}
1190
4f14c194
TM		 1191static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1192{
1193 struct nfs_client *clp = state->owner->so_server->nfs_client;
1194 bool need_recover = false;
1195
1196 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1197 need_recover = true;
1198 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1199 need_recover = true;
1200 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1201 need_recover = true;
1202 if (need_recover)
1203 nfs4_state_mark_reclaim_nograce(clp, state);
1204}
1205
e999e80e
TM		 1206static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1207 nfs4_stateid *stateid)
1208{
1209 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1210 return true;
4f14c194
TM		 1211 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1212 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1213 return true;
4f14c194 1214 }
e999e80e
TM		 1215 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1216 return true;
1217 return false;
1218}
1219
f95549cf
TM		 1220static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1221{
3c38cbe2
TM		 1222 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1223 return;
f95549cf
TM		 1224 if (state->n_wronly)
1225 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1226 if (state->n_rdonly)
1227 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1228 if (state->n_rdwr)
1229 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1230 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1231}
1232
226056c5 1233static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1234 nfs4_stateid *arg_stateid,
226056c5 1235 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1236{
226056c5
TM		 1237 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1238 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1239 case FMODE_WRITE:
1240 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1241 break;
1242 case FMODE_READ:
1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1244 break;
1245 case 0:
1246 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1247 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1248 clear_bit(NFS_OPEN_STATE, &state->flags);
1249 }
1250 if (stateid == NULL)
1251 return;
f95549cf 1252 /* Handle races with OPEN */
4a1e2feb
TM		 1253 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1254 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1255 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1256 nfs_resync_open_stateid_locked(state);
226056c5 1257 return;
f95549cf 1258 }
003707c7 1259 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1260 nfs4_stateid_copy(&state->stateid, stateid);
1261 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1262}
1263
4a1e2feb
TM		 1264static void nfs_clear_open_stateid(struct nfs4_state *state,
1265 nfs4_stateid *arg_stateid,
1266 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1267{
1268 write_seqlock(&state->seqlock);
4a1e2feb 1269 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1270 write_sequnlock(&state->seqlock);
4f14c194
TM		 1271 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1272 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1273}
1274
dc0b027d 1275static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1276{
dc0b027d 1277 switch (fmode) {
003707c7
TM		 1278 case FMODE_READ:
1279 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1280 break;
1281 case FMODE_WRITE:
1282 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1283 break;
1284 case FMODE_READ|FMODE_WRITE:
1285 set_bit(NFS_O_RDWR_STATE, &state->flags);
1286 }
e999e80e
TM		 1287 if (!nfs_need_update_open_stateid(state, stateid))
1288 return;
1289 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1290 nfs4_stateid_copy(&state->stateid, stateid);
1291 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1292}
1293
dc0b027d 1294static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1295{
8bda4e4c
TM		 1296 /*
1297 * Protect the call to nfs4_state_set_mode_locked and
1298 * serialise the stateid update
1299 */
1300 write_seqlock(&state->seqlock);
003707c7 1301 if (deleg_stateid != NULL) {
f597c537 1302 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1303 set_bit(NFS_DELEGATED_STATE, &state->flags);
1304 }
1305 if (open_stateid != NULL)
dc0b027d 1306 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1307 write_sequnlock(&state->seqlock);
1308 spin_lock(&state->owner->so_lock);
dc0b027d 1309 update_open_stateflags(state, fmode);
ec073428 1310 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1311}
1312
dc0b027d 1313static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1314{
1315 struct nfs_inode *nfsi = NFS_I(state->inode);
1316 struct nfs_delegation *deleg_cur;
1317 int ret = 0;
1318
dc0b027d 1319 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1320
1321 rcu_read_lock();
1322 deleg_cur = rcu_dereference(nfsi->delegation);
1323 if (deleg_cur == NULL)
1324 goto no_delegation;
1325
1326 spin_lock(&deleg_cur->lock);
17f26b12 1327 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1328 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1329 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1330 goto no_delegation_unlock;
1331
1332 if (delegation == NULL)
1333 delegation = &deleg_cur->stateid;
f597c537 1334 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1335 goto no_delegation_unlock;
1336
b7391f44 1337 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1338 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1339 ret = 1;
1340no_delegation_unlock:
1341 spin_unlock(&deleg_cur->lock);
1342no_delegation:
1343 rcu_read_unlock();
1344
1345 if (!ret && open_stateid != NULL) {
dc0b027d 1346 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1347 ret = 1;
1348 }
4f14c194
TM		 1349 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1350 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1351
1352 return ret;
1353}
1354
39071e6f
TM		 1355static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1356 const nfs4_stateid *stateid)
1357{
1358 struct nfs4_state *state = lsp->ls_state;
1359 bool ret = false;
1360
1361 spin_lock(&state->state_lock);
1362 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1363 goto out_noupdate;
1364 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1365 goto out_noupdate;
1366 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1367 ret = true;
1368out_noupdate:
1369 spin_unlock(&state->state_lock);
1370 return ret;
1371}
34310430 1372
dc0b027d 1373static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1374{
1375 struct nfs_delegation *delegation;
1376
1377 rcu_read_lock();
1378 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1379 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1380 rcu_read_unlock();
1381 return;
1382 }
1383 rcu_read_unlock();
57ec14c5 1384 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1385}
1386
6ee41268 1387static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1388{
1389 struct nfs4_state *state = opendata->state;
1390 struct nfs_inode *nfsi = NFS_I(state->inode);
1391 struct nfs_delegation *delegation;
f448badd 1392 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1393 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1394 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1395 nfs4_stateid stateid;
1396 int ret = -EAGAIN;
1397
aac00a8d 1398 for (;;) {
61beef75 1399 spin_lock(&state->owner->so_lock);
dc0b027d 1400 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1401 update_open_stateflags(state, fmode);
6ee41268 1402 spin_unlock(&state->owner->so_lock);
61beef75 1403 goto out_return_state;
6ee41268 1404 }
61beef75 1405 spin_unlock(&state->owner->so_lock);
34310430
TM		 1406 rcu_read_lock();
1407 delegation = rcu_dereference(nfsi->delegation);
2a606188 1408 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1409 rcu_read_unlock();
aac00a8d 1410 break;
34310430 1411 }
aac00a8d 1412 /* Save the delegation */
f597c537 1413 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1414 rcu_read_unlock();
fa332941 1415 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1416 if (!opendata->is_recover) {
1417 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1418 if (ret != 0)
1419 goto out;
1420 }
aac00a8d 1421 ret = -EAGAIN;
34310430
TM		 1422
1423 /* Try to update the stateid using the delegation */
dc0b027d 1424 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1425 goto out_return_state;
aac00a8d 1426 }
aac00a8d
TM		 1427out:
1428 return ERR_PTR(ret);
1429out_return_state:
1430 atomic_inc(&state->count);
1431 return state;
1432}
1433
e23008ec
AA		 1434static void
1435nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1436{
1437 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1438 struct nfs_delegation *delegation;
1439 int delegation_flags = 0;
1440
1441 rcu_read_lock();
1442 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1443 if (delegation)
1444 delegation_flags = delegation->flags;
1445 rcu_read_unlock();
1446 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1447 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1448 "returning a delegation for "
1449 "OPEN(CLAIM_DELEGATE_CUR)\n",
1450 clp->cl_hostname);
1451 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1452 nfs_inode_set_delegation(state->inode,
1453 data->owner->so_cred,
1454 &data->o_res);
1455 else
1456 nfs_inode_reclaim_delegation(state->inode,
1457 data->owner->so_cred,
1458 &data->o_res);
1459}
1460
1461/*
1462 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1463 * and update the nfs4_state.
1464 */
1465static struct nfs4_state *
1466_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1467{
1468 struct inode *inode = data->state->inode;
1469 struct nfs4_state *state = data->state;
1470 int ret;
1471
d2bfda2e
WAA		 1472 if (!data->rpc_done) {
1473 if (data->rpc_status) {
1474 ret = data->rpc_status;
1475 goto err;
1476 }
1477 /* cached opens have already been processed */
1478 goto update;
e23008ec
AA		 1479 }
1480
e23008ec
AA		 1481 ret = nfs_refresh_inode(inode, &data->f_attr);
1482 if (ret)
1483 goto err;
1484
1485 if (data->o_res.delegation_type != 0)
1486 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1487update:
e23008ec
AA		 1488 update_open_stateid(state, &data->o_res.stateid, NULL,
1489 data->o_arg.fmode);
d49f042a 1490 atomic_inc(&state->count);
e23008ec
AA		 1491
1492 return state;
1493err:
1494 return ERR_PTR(ret);
1495
1496}
1497
1498static struct nfs4_state *
1499_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1500{
1501 struct inode *inode;
1502 struct nfs4_state *state = NULL;
1b370bc2 1503 int ret;
24ac23ab 1504
aac00a8d 1505 if (!data->rpc_done) {
6ee41268 1506 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1507 goto out;
1508 }
1509
1b370bc2 1510 ret = -EAGAIN;
24ac23ab 1511 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1512 goto err;
1775fd3e 1513 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1514 ret = PTR_ERR(inode);
03f28e3a 1515 if (IS_ERR(inode))
1b370bc2
TM		 1516 goto err;
1517 ret = -ENOMEM;
24ac23ab
TM		 1518 state = nfs4_get_open_state(inode, data->owner);
1519 if (state == NULL)
1b370bc2 1520 goto err_put_inode;
e23008ec
AA		 1521 if (data->o_res.delegation_type != 0)
1522 nfs4_opendata_check_deleg(data, state);
34310430 1523 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1524 data->o_arg.fmode);
24ac23ab 1525 iput(inode);
aac00a8d 1526out:
7aa262b5 1527 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1528 return state;
1b370bc2
TM		 1529err_put_inode:
1530 iput(inode);
1531err:
1532 return ERR_PTR(ret);
24ac23ab
TM		 1533}
1534
e23008ec
AA		 1535static struct nfs4_state *
1536nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1537{
1538 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1539 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1540 return _nfs4_opendata_to_nfs4_state(data);
1541}
1542
864472e9
TM		 1543static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1544{
1545 struct nfs_inode *nfsi = NFS_I(state->inode);
1546 struct nfs_open_context *ctx;
1547
1548 spin_lock(&state->inode->i_lock);
1549 list_for_each_entry(ctx, &nfsi->open_files, list) {
1550 if (ctx->state != state)
1551 continue;
1552 get_nfs_open_context(ctx);
1553 spin_unlock(&state->inode->i_lock);
1554 return ctx;
1555 }
1556 spin_unlock(&state->inode->i_lock);
1557 return ERR_PTR(-ENOENT);
1558}
1559
4a1c0893
TM		 1560static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1561 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1562{
1563 struct nfs4_opendata *opendata;
1564
4a1c0893 1565 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1566 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1567 if (opendata == NULL)
1568 return ERR_PTR(-ENOMEM);
1569 opendata->state = state;
1570 atomic_inc(&state->count);
1571 return opendata;
1572}
1573
dc0b027d 1574static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1575{
2ced46c2 1576 struct nfs4_state *newstate;
864472e9
TM		 1577 int ret;
1578
39f897fd
N		 1579 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1580 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1581 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1582 /* This mode can't have been delegated, so we must have
1583 * a valid open_stateid to cover it - not need to reclaim.
1584 */
1585 return 0;
dc0b027d
TM		 1586 opendata->o_arg.open_flags = 0;
1587 opendata->o_arg.fmode = fmode;
be36e185
TM		 1588 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1589 NFS_SB(opendata->dentry->d_sb),
1590 fmode, 0);
2ced46c2
TM		 1591 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1592 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1593 nfs4_init_opendata_res(opendata);
b257957e 1594 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1595 if (ret != 0)
1596 return ret;
2ced46c2 1597 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1598 if (IS_ERR(newstate))
1599 return PTR_ERR(newstate);
643168c2 1600 nfs4_close_state(newstate, fmode);
2ced46c2 1601 *res = newstate;
864472e9
TM		 1602 return 0;
1603}
1604
1605static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1606{
864472e9 1607 struct nfs4_state *newstate;
864472e9
TM		 1608 int ret;
1609
4f14c194
TM		 1610 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1611 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1612 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1613 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1614 /* memory barrier prior to reading state->n_* */
2ced46c2 1615 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1616 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1617 smp_rmb();
1618 if (state->n_rdwr != 0) {
2ced46c2 1619 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1620 if (ret != 0)
1621 return ret;
2ced46c2
TM		 1622 if (newstate != state)
1623 return -ESTALE;
864472e9
TM		 1624 }
1625 if (state->n_wronly != 0) {
2ced46c2 1626 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1627 if (ret != 0)
1628 return ret;
2ced46c2
TM		 1629 if (newstate != state)
1630 return -ESTALE;
864472e9
TM		 1631 }
1632 if (state->n_rdonly != 0) {
2ced46c2 1633 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1634 if (ret != 0)
1635 return ret;
2ced46c2
TM		 1636 if (newstate != state)
1637 return -ESTALE;
864472e9 1638 }
1ac7e2fd
TM		 1639 /*
1640 * We may have performed cached opens for all three recoveries.
1641 * Check if we need to update the current stateid.
1642 */
1643 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1644 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1645 write_seqlock(&state->seqlock);
1ac7e2fd 1646 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1647 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1648 write_sequnlock(&state->seqlock);
1ac7e2fd 1649 }
864472e9
TM		 1650 return 0;
1651}
1652
1da177e4
LT		 1653/*
1654 * OPEN_RECLAIM:
1655 * reclaim state on the server after a reboot.
1da177e4 1656 */
539cd03a 1657static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1658{
1ac7e2fd 1659 struct nfs_delegation *delegation;
864472e9 1660 struct nfs4_opendata *opendata;
dc0b027d 1661 fmode_t delegation_type = 0;
1da177e4
LT		 1662 int status;
1663
4a1c0893
TM		 1664 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1665 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1666 if (IS_ERR(opendata))
1667 return PTR_ERR(opendata);
1ac7e2fd
TM		 1668 rcu_read_lock();
1669 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1670 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1671 delegation_type = delegation->type;
1ac7e2fd 1672 rcu_read_unlock();
864472e9
TM		 1673 opendata->o_arg.u.delegation_type = delegation_type;
1674 status = nfs4_open_recover(opendata, state);
c6d00e63 1675 nfs4_opendata_put(opendata);
1da177e4
LT		 1676 return status;
1677}
1678
539cd03a 1679static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1680{
1681 struct nfs_server *server = NFS_SERVER(state->inode);
1682 struct nfs4_exception exception = { };
1683 int err;
1684 do {
539cd03a 1685 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1686 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1687 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1688 continue;
168667c4 1689 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1690 break;
1691 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1692 } while (exception.retry);
1693 return err;
1694}
1695
864472e9
TM		 1696static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1697{
1698 struct nfs_open_context *ctx;
1699 int ret;
1700
1701 ctx = nfs4_state_find_open_context(state);
1702 if (IS_ERR(ctx))
91876b13 1703 return -EAGAIN;
539cd03a 1704 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1705 put_nfs_open_context(ctx);
1706 return ret;
1707}
1708
db4f2e63 1709static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1710{
be76b5b6
TM		 1711 switch (err) {
1712 default:
1713 printk(KERN_ERR "NFS: %s: unhandled error "
1714 "%d.\n", __func__, err);
1715 case 0:
1716 case -ENOENT:
8eee52af 1717 case -EAGAIN:
be76b5b6
TM		 1718 case -ESTALE:
1719 break;
1720 case -NFS4ERR_BADSESSION:
1721 case -NFS4ERR_BADSLOT:
1722 case -NFS4ERR_BAD_HIGH_SLOT:
1723 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1724 case -NFS4ERR_DEADSESSION:
1725 set_bit(NFS_DELEGATED_STATE, &state->flags);
1726 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1727 return -EAGAIN;
1728 case -NFS4ERR_STALE_CLIENTID:
1729 case -NFS4ERR_STALE_STATEID:
1730 set_bit(NFS_DELEGATED_STATE, &state->flags);
1731 case -NFS4ERR_EXPIRED:
1732 /* Don't recall a delegation if it was lost */
1733 nfs4_schedule_lease_recovery(server->nfs_client);
1734 return -EAGAIN;
352297b9
CL		 1735 case -NFS4ERR_MOVED:
1736 nfs4_schedule_migration_recovery(server);
1737 return -EAGAIN;
8ef2f8d4
CL		 1738 case -NFS4ERR_LEASE_MOVED:
1739 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1740 return -EAGAIN;
be76b5b6
TM		 1741 case -NFS4ERR_DELEG_REVOKED:
1742 case -NFS4ERR_ADMIN_REVOKED:
1743 case -NFS4ERR_BAD_STATEID:
db4f2e63 1744 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1745 nfs_inode_find_state_and_recover(state->inode,
1746 stateid);
1747 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1748 return -EAGAIN;
be76b5b6
TM		 1749 case -NFS4ERR_DELAY:
1750 case -NFS4ERR_GRACE:
1751 set_bit(NFS_DELEGATED_STATE, &state->flags);
1752 ssleep(1);
1753 return -EAGAIN;
db4f2e63
TM		 1754 case -ENOMEM:
1755 case -NFS4ERR_DENIED:
1756 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1757 return 0;
be76b5b6 1758 }
1da177e4
LT		 1759 return err;
1760}
1761
db4f2e63
TM		 1762int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1763{
1764 struct nfs_server *server = NFS_SERVER(state->inode);
1765 struct nfs4_opendata *opendata;
1766 int err;
1767
1768 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1769 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1770 if (IS_ERR(opendata))
1771 return PTR_ERR(opendata);
1772 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1773 err = nfs4_open_recover(opendata, state);
1774 nfs4_opendata_put(opendata);
1775 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1776}
1777
be05c860
CL		 1778static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1779{
1780 struct nfs4_opendata *data = calldata;
1781
cb04ad2a
PT		 1782 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1783 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1784}
1785
cdd4e68b
TM		 1786static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1787{
1788 struct nfs4_opendata *data = calldata;
1789
17ead6c8 1790 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1791
cdd4e68b 1792 data->rpc_status = task->tk_status;
26e976a8 1793 if (data->rpc_status == 0) {
f597c537 1794 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1795 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1796 renew_lease(data->o_res.server, data->timestamp);
3e309914 1797 data->rpc_done = 1;
26e976a8 1798 }
cdd4e68b
TM		 1799}
1800
1801static void nfs4_open_confirm_release(void *calldata)
1802{
1803 struct nfs4_opendata *data = calldata;
1804 struct nfs4_state *state = NULL;
1805
1806 /* If this request hasn't been cancelled, do nothing */
1807 if (data->cancelled == 0)
1808 goto out_free;
1809 /* In case of error, no cleanup! */
3e309914 1810 if (!data->rpc_done)
cdd4e68b 1811 goto out_free;
cdd4e68b 1812 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1813 if (!IS_ERR(state))
643168c2 1814 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1815out_free:
c6d00e63 1816 nfs4_opendata_put(data);
cdd4e68b
TM		 1817}
1818
1819static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1820 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1821 .rpc_call_done = nfs4_open_confirm_done,
1822 .rpc_release = nfs4_open_confirm_release,
1823};
1824
1825/*
1826 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1827 */
1828static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1829{
2b0143b5 1830 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1831 struct rpc_task *task;
5138fde0
TM		 1832 struct rpc_message msg = {
1833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1834 .rpc_argp = &data->c_arg,
1835 .rpc_resp = &data->c_res,
1836 .rpc_cred = data->owner->so_cred,
1837 };
c970aa85
TM		 1838 struct rpc_task_setup task_setup_data = {
1839 .rpc_client = server->client,
5138fde0 1840 .rpc_message = &msg,
c970aa85
TM		 1841 .callback_ops = &nfs4_open_confirm_ops,
1842 .callback_data = data,
101070ca 1843 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1844 .flags = RPC_TASK_ASYNC,
1845 };
1da177e4
LT		 1846 int status;
1847
17ead6c8 1848 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1849 kref_get(&data->kref);
3e309914
TM		 1850 data->rpc_done = 0;
1851 data->rpc_status = 0;
5138fde0 1852 data->timestamp = jiffies;
c970aa85 1853 task = rpc_run_task(&task_setup_data);
7a1218a2 1854 if (IS_ERR(task))
cdd4e68b 1855 return PTR_ERR(task);
cdd4e68b
TM		 1856 status = nfs4_wait_for_completion_rpc_task(task);
1857 if (status != 0) {
1858 data->cancelled = 1;
1859 smp_wmb();
1860 } else
1861 status = data->rpc_status;
e6b3c4db 1862 rpc_put_task(task);
1da177e4
LT		 1863 return status;
1864}
1865
24ac23ab 1866static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1867{
24ac23ab
TM		 1868 struct nfs4_opendata *data = calldata;
1869 struct nfs4_state_owner *sp = data->owner;
549b19cc 1870 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1871 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1872
24ac23ab 1873 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1874 goto out_wait;
aac00a8d
TM		 1875 /*
1876 * Check if we still need to send an OPEN call, or if we can use
1877 * a delegation instead.
1878 */
1879 if (data->state != NULL) {
1880 struct nfs_delegation *delegation;
1881
dc0b027d 1882 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1883 goto out_no_action;
aac00a8d
TM		 1884 rcu_read_lock();
1885 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1886 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1887 goto unlock_no_action;
aac00a8d
TM		 1888 rcu_read_unlock();
1889 }
95b72eb0 1890 /* Update client id. */
549b19cc 1891 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1892 switch (claim) {
1893 default:
1894 break;
8188df17
TM		 1895 case NFS4_OPEN_CLAIM_PREVIOUS:
1896 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1897 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1898 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1899 case NFS4_OPEN_CLAIM_FH:
1900 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1901 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1902 }
26e976a8 1903 data->timestamp = jiffies;
035168ab 1904 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1905 &data->o_arg.seq_args,
2240a9e2
TM		 1906 &data->o_res.seq_res,
1907 task) != 0)
1908 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1909
1910 /* Set the create mode (note dependency on the session type) */
1911 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1912 if (data->o_arg.open_flags & O_EXCL) {
1913 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1914 if (nfs4_has_persistent_session(clp))
1915 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1916 else if (clp->cl_mvops->minor_version > 0)
1917 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1918 }
6ee41268 1919 return;
652f89f6
TM		 1920unlock_no_action:
1921 rcu_read_unlock();
6ee41268
TM		 1922out_no_action:
1923 task->tk_action = NULL;
c8da19b9 1924out_wait:
b75ad4cd 1925 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1926}
1927
24ac23ab
TM		 1928static void nfs4_open_done(struct rpc_task *task, void *calldata)
1929{
1930 struct nfs4_opendata *data = calldata;
1da177e4 1931
24ac23ab 1932 data->rpc_status = task->tk_status;
d898528c 1933
14516c3a
TM		 1934 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1935 return;
d898528c 1936
24ac23ab 1937 if (task->tk_status == 0) {
807d66d8
TM		 1938 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1939 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1940 case S_IFREG:
1941 break;
1942 case S_IFLNK:
24ac23ab 1943 data->rpc_status = -ELOOP;
6f926b5b
TM		 1944 break;
1945 case S_IFDIR:
24ac23ab 1946 data->rpc_status = -EISDIR;
6f926b5b
TM		 1947 break;
1948 default:
24ac23ab 1949 data->rpc_status = -ENOTDIR;
807d66d8 1950 }
6f926b5b 1951 }
26e976a8 1952 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1953 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1954 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1955 }
3e309914 1956 data->rpc_done = 1;
24ac23ab 1957}
6f926b5b 1958
24ac23ab
TM		 1959static void nfs4_open_release(void *calldata)
1960{
1961 struct nfs4_opendata *data = calldata;
1962 struct nfs4_state *state = NULL;
1963
1964 /* If this request hasn't been cancelled, do nothing */
1965 if (data->cancelled == 0)
1966 goto out_free;
1967 /* In case of error, no cleanup! */
3e309914 1968 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1969 goto out_free;
1970 /* In case we need an open_confirm, no cleanup! */
1971 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1972 goto out_free;
24ac23ab 1973 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1974 if (!IS_ERR(state))
643168c2 1975 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1976out_free:
c6d00e63 1977 nfs4_opendata_put(data);
24ac23ab
TM		 1978}
1979
1980static const struct rpc_call_ops nfs4_open_ops = {
1981 .rpc_call_prepare = nfs4_open_prepare,
1982 .rpc_call_done = nfs4_open_done,
1983 .rpc_release = nfs4_open_release,
1984};
1985
b257957e 1986static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1987{
2b0143b5 1988 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1989 struct nfs_server *server = NFS_SERVER(dir);
1990 struct nfs_openargs *o_arg = &data->o_arg;
1991 struct nfs_openres *o_res = &data->o_res;
1992 struct rpc_task *task;
5138fde0
TM		 1993 struct rpc_message msg = {
1994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1995 .rpc_argp = o_arg,
1996 .rpc_resp = o_res,
1997 .rpc_cred = data->owner->so_cred,
1998 };
c970aa85
TM		 1999 struct rpc_task_setup task_setup_data = {
2000 .rpc_client = server->client,
5138fde0 2001 .rpc_message = &msg,
c970aa85
TM		 2002 .callback_ops = &nfs4_open_ops,
2003 .callback_data = data,
101070ca 2004 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2005 .flags = RPC_TASK_ASYNC,
2006 };
24ac23ab
TM		 2007 int status;
2008
a9c92d6b 2009 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2010 kref_get(&data->kref);
3e309914
TM		 2011 data->rpc_done = 0;
2012 data->rpc_status = 0;
2ced46c2 2013 data->cancelled = 0;
bdeca1b7
TM		 2014 data->is_recover = 0;
2015 if (isrecover) {
8fe72bac 2016 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2017 data->is_recover = 1;
2018 }
c970aa85 2019 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2020 if (IS_ERR(task))
2021 return PTR_ERR(task);
2022 status = nfs4_wait_for_completion_rpc_task(task);
2023 if (status != 0) {
2024 data->cancelled = 1;
2025 smp_wmb();
2026 } else
2027 status = data->rpc_status;
2028 rpc_put_task(task);
2029
2030 return status;
2031}
2032
2033static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2034{
2b0143b5 2035 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2036 struct nfs_openres *o_res = &data->o_res;
2037 int status;
2038
2039 status = nfs4_run_open_task(data, 1);
2040 if (status != 0 || !data->rpc_done)
2041 return status;
2042
6926afd1
TM		 2043 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2044
b257957e
AB		 2045 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2046 status = _nfs4_proc_open_confirm(data);
2047 if (status != 0)
2048 return status;
2049 }
2050
2051 return status;
2052}
2053
f3792d63
TM		 2054/*
2055 * Additional permission checks in order to distinguish between an
2056 * open for read, and an open for execute. This works around the
2057 * fact that NFSv4 OPEN treats read and execute permissions as being
2058 * the same.
2059 * Note that in the non-execute case, we want to turn off permission
2060 * checking if we just created a new file (POSIX open() semantics).
2061 */
6168f62c
WAA		 2062static int nfs4_opendata_access(struct rpc_cred *cred,
2063 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2064 struct nfs4_state *state, fmode_t fmode,
2065 int openflags)
6168f62c
WAA		 2066{
2067 struct nfs_access_entry cache;
2068 u32 mask;
2069
2070 /* access call failed or for some reason the server doesn't
2071 * support any access modes -- defer access call until later */
2072 if (opendata->o_res.access_supported == 0)
2073 return 0;
2074
2075 mask = 0;
f3792d63
TM		 2076 /*
2077 * Use openflags to check for exec, because fmode won't
2078 * always have FMODE_EXEC set when file open for exec.
2079 */
f8d9a897
WAA		 2080 if (openflags & __FMODE_EXEC) {
2081 /* ONLY check for exec rights */
2082 mask = MAY_EXEC;
f3792d63 2083 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2084 mask = MAY_READ;
6168f62c
WAA		 2085
2086 cache.cred = cred;
2087 cache.jiffies = jiffies;
2088 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2089 nfs_access_add_cache(state->inode, &cache);
2090
bbd3a8ee 2091 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2092 return 0;
2093
2094 /* even though OPEN succeeded, access is denied. Close the file */
2095 nfs4_close_state(state, fmode);
998f40b5 2096 return -EACCES;
6168f62c
WAA		 2097}
2098
b257957e
AB		 2099/*
2100 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2101 */
2102static int _nfs4_proc_open(struct nfs4_opendata *data)
2103{
2b0143b5 2104 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2105 struct nfs_server *server = NFS_SERVER(dir);
2106 struct nfs_openargs *o_arg = &data->o_arg;
2107 struct nfs_openres *o_res = &data->o_res;
2108 int status;
2109
2110 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2111 if (!data->rpc_done)
2112 return status;
2113 if (status != 0) {
2114 if (status == -NFS4ERR_BADNAME &&
2115 !(o_arg->open_flags & O_CREAT))
2116 return -ENOENT;
24ac23ab 2117 return status;
08ef7bd3 2118 }
24ac23ab 2119
6926afd1
TM		 2120 nfs_fattr_map_and_free_names(server, &data->f_attr);
2121
5bc2afc2 2122 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2123 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2124 if (o_arg->open_flags & O_EXCL)
2125 data->file_created = 1;
2126 else if (o_res->cinfo.before != o_res->cinfo.after)
2127 data->file_created = 1;
2128 }
0df5dd4a
TM		 2129 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2130 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2131 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2132 status = _nfs4_proc_open_confirm(data);
1da177e4 2133 if (status != 0)
24ac23ab 2134 return status;
1da177e4
LT		 2135 }
2136 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2137 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2138 return 0;
1da177e4
LT		 2139}
2140
d83217c1
AA		 2141static int nfs4_recover_expired_lease(struct nfs_server *server)
2142{
2143 return nfs4_client_recover_expired_lease(server->nfs_client);
2144}
2145
1da177e4
LT		 2146/*
2147 * OPEN_EXPIRED:
2148 * reclaim state on the server after a network partition.
2149 * Assumes caller holds the appropriate lock
2150 */
539cd03a 2151static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2152{
e56e0b78 2153 struct nfs4_opendata *opendata;
864472e9 2154 int ret;
1da177e4 2155
4a1c0893 2156 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2157 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2158 if (IS_ERR(opendata))
2159 return PTR_ERR(opendata);
864472e9 2160 ret = nfs4_open_recover(opendata, state);
35d05778 2161 if (ret == -ESTALE)
3d4ff43d 2162 d_drop(ctx->dentry);
c6d00e63 2163 nfs4_opendata_put(opendata);
864472e9 2164 return ret;
1da177e4
LT		 2165}
2166
a9ed2e25 2167static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2168{
539cd03a 2169 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2170 struct nfs4_exception exception = { };
2171 int err;
2172
2173 do {
539cd03a 2174 err = _nfs4_open_expired(ctx, state);
42113a75 2175 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2176 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2177 continue;
a9ed2e25
TM		 2178 switch (err) {
2179 default:
2180 goto out;
2181 case -NFS4ERR_GRACE:
2182 case -NFS4ERR_DELAY:
2183 nfs4_handle_exception(server, err, &exception);
2184 err = 0;
2185 }
202b50dc 2186 } while (exception.retry);
a9ed2e25 2187out:
202b50dc
TM		 2188 return err;
2189}
2190
1da177e4
LT		 2191static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2192{
1da177e4 2193 struct nfs_open_context *ctx;
864472e9 2194 int ret;
1da177e4 2195
864472e9
TM		 2196 ctx = nfs4_state_find_open_context(state);
2197 if (IS_ERR(ctx))
91876b13 2198 return -EAGAIN;
539cd03a 2199 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2200 put_nfs_open_context(ctx);
2201 return ret;
1da177e4
LT		 2202}
2203
4dfd4f7a
TM		 2204static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2205{
2206 nfs_remove_bad_delegation(state->inode);
2207 write_seqlock(&state->seqlock);
2208 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2209 write_sequnlock(&state->seqlock);
2210 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2211}
2212
2213static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2214{
2215 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2216 nfs_finish_clear_delegation_stateid(state);
2217}
2218
2219static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2220{
2221 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2222 nfs40_clear_delegation_stateid(state);
2223 return nfs4_open_expired(sp, state);
2224}
2225
f062eb6c 2226#if defined(CONFIG_NFS_V4_1)
0c116cad 2227static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2228{
f062eb6c 2229 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2230 nfs4_stateid stateid;
ab7cb0df 2231 struct nfs_delegation *delegation;
0c116cad
TM		 2232 struct rpc_cred *cred;
2233 int status;
3e60ffdd 2234
ab7cb0df
TM		 2235 /* Get the delegation credential for use by test/free_stateid */
2236 rcu_read_lock();
2237 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2238 if (delegation == NULL) {
ab7cb0df 2239 rcu_read_unlock();
0c116cad
TM		 2240 return;
2241 }
2242
2243 nfs4_stateid_copy(&stateid, &delegation->stateid);
2244 cred = get_rpccred(delegation->cred);
2245 rcu_read_unlock();
2246 status = nfs41_test_stateid(server, &stateid, cred);
2247 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2248
3e60ffdd
CL		 2249 if (status != NFS_OK) {
2250 /* Free the stateid unless the server explicitly
2251 * informs us the stateid is unrecognized. */
2252 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2253 nfs41_free_stateid(server, &stateid, cred);
2254 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2255 }
ab7cb0df 2256
0c116cad 2257 put_rpccred(cred);
3e60ffdd
CL		 2258}
2259
2260/**
2261 * nfs41_check_open_stateid - possibly free an open stateid
2262 *
2263 * @state: NFSv4 state for an inode
2264 *
2265 * Returns NFS_OK if recovery for this stateid is now finished.
2266 * Otherwise a negative NFS4ERR value is returned.
2267 */
2268static int nfs41_check_open_stateid(struct nfs4_state *state)
2269{
2270 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2271 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2272 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2273 int status;
2274
2275 /* If a state reset has been done, test_stateid is unneeded */
2276 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2277 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2278 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2279 return -NFS4ERR_BAD_STATEID;
2280
ab7cb0df 2281 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2282 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2283 if (status != NFS_OK) {
2284 /* Free the stateid unless the server explicitly
2285 * informs us the stateid is unrecognized. */
2286 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2287 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2288
2289 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2290 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2291 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2292 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2293 }
2294 return status;
2295}
2296
2297static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2298{
eb64cf96 2299 int status;
b01dd1d8 2300
0c116cad 2301 nfs41_check_delegation_stateid(state);
3e60ffdd 2302 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2303 if (status != NFS_OK)
2304 status = nfs4_open_expired(sp, state);
2305 return status;
f062eb6c
BS		 2306}
2307#endif
2308
aa53ed54
JL		 2309/*
2310 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2311 * fields corresponding to attributes that were used to store the verifier.
2312 * Make sure we clobber those fields in the later setattr call
2313 */
5334c5bd
KM		 2314static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2315 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2316{
5334c5bd
KM		 2317 const u32 *attrset = opendata->o_res.attrset;
2318
2319 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2320 !(sattr->ia_valid & ATTR_ATIME_SET))
2321 sattr->ia_valid |= ATTR_ATIME;
2322
5334c5bd 2323 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2324 !(sattr->ia_valid & ATTR_MTIME_SET))
2325 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2326
2327 /* Except MODE, it seems harmless of setting twice. */
2328 if ((attrset[1] & FATTR4_WORD1_MODE))
2329 sattr->ia_valid &= ~ATTR_MODE;
2330
2331 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2332 *label = NULL;
aa53ed54
JL		 2333}
2334
c21443c2
TM		 2335static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2336 fmode_t fmode,
2337 int flags,
3efb9722 2338 struct nfs_open_context *ctx)
c21443c2
TM		 2339{
2340 struct nfs4_state_owner *sp = opendata->owner;
2341 struct nfs_server *server = sp->so_server;
275bb307 2342 struct dentry *dentry;
c21443c2
TM		 2343 struct nfs4_state *state;
2344 unsigned int seq;
2345 int ret;
2346
2347 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2348
2349 ret = _nfs4_proc_open(opendata);
dca78001 2350 if (ret != 0)
c21443c2
TM		 2351 goto out;
2352
2353 state = nfs4_opendata_to_nfs4_state(opendata);
2354 ret = PTR_ERR(state);
2355 if (IS_ERR(state))
2356 goto out;
2357 if (server->caps & NFS_CAP_POSIX_LOCK)
2358 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2359
275bb307 2360 dentry = opendata->dentry;
2b0143b5 2361 if (d_really_is_negative(dentry)) {
275bb307
TM		 2362 /* FIXME: Is this d_drop() ever needed? */
2363 d_drop(dentry);
2364 dentry = d_add_unique(dentry, igrab(state->inode));
2365 if (dentry == NULL) {
2366 dentry = opendata->dentry;
2367 } else if (dentry != ctx->dentry) {
2368 dput(ctx->dentry);
2369 ctx->dentry = dget(dentry);
2370 }
2371 nfs_set_verifier(dentry,
2b0143b5 2372 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2373 }
2374
c21443c2
TM		 2375 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2376 if (ret != 0)
2377 goto out;
2378
3efb9722 2379 ctx->state = state;
2b0143b5 2380 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2381 nfs_inode_attach_open_context(ctx);
2382 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2383 nfs4_schedule_stateid_recovery(server, state);
2384 }
c21443c2
TM		 2385out:
2386 return ret;
2387}
2388
1da177e4 2389/*
24ac23ab 2390 * Returns a referenced nfs4_state
1da177e4 2391 */
82be417a 2392static int _nfs4_do_open(struct inode *dir,
4197a055 2393 struct nfs_open_context *ctx,
82be417a
AA		 2394 int flags,
2395 struct iattr *sattr,
5bc2afc2
TM		 2396 struct nfs4_label *label,
2397 int *opened)
1da177e4
LT		 2398{
2399 struct nfs4_state_owner *sp;
2400 struct nfs4_state *state = NULL;
2401 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2402 struct nfs4_opendata *opendata;
4197a055
TM		 2403 struct dentry *dentry = ctx->dentry;
2404 struct rpc_cred *cred = ctx->cred;
2405 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2406 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2407 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2408 struct nfs4_label *olabel = NULL;
aac00a8d 2409 int status;
1da177e4
LT		 2410
2411 /* Protect against reboot recovery conflicts */
1da177e4 2412 status = -ENOMEM;
d1e284d5
TM		 2413 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2414 if (sp == NULL) {
1da177e4
LT		 2415 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2416 goto out_err;
2417 }
58d9714a
TM		 2418 status = nfs4_recover_expired_lease(server);
2419 if (status != 0)
b4454fe1 2420 goto err_put_state_owner;
2b0143b5
DH		 2421 if (d_really_is_positive(dentry))
2422 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2423 status = -ENOMEM;
2b0143b5 2424 if (d_really_is_positive(dentry))
49f9a0fa 2425 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2426 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2427 label, claim, GFP_KERNEL);
e56e0b78 2428 if (opendata == NULL)
95d35cb4 2429 goto err_put_state_owner;
1da177e4 2430
14c43f76
DQ		 2431 if (label) {
2432 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2433 if (IS_ERR(olabel)) {
2434 status = PTR_ERR(olabel);
2435 goto err_opendata_put;
2436 }
2437 }
2438
e911b815
TM		 2439 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2440 if (!opendata->f_attr.mdsthreshold) {
2441 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2442 if (!opendata->f_attr.mdsthreshold)
2443 goto err_free_label;
2444 }
1549210f 2445 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2446 }
2b0143b5
DH		 2447 if (d_really_is_positive(dentry))
2448 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2449
3efb9722 2450 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2451 if (status != 0)
14c43f76 2452 goto err_free_label;
3efb9722 2453 state = ctx->state;
6168f62c 2454
efcbc04e 2455 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2456 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2457 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2458
2459 nfs_fattr_init(opendata->o_res.f_attr);
2460 status = nfs4_do_setattr(state->inode, cred,
2461 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2462 state, label, olabel);
2463 if (status == 0) {
f044636d
TM		 2464 nfs_setattr_update_inode(state->inode, sattr,
2465 opendata->o_res.f_attr);
aa9c2669 2466 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2467 }
0ab64e0e 2468 }
c5c3fb5f 2469 if (opened && opendata->file_created)
5bc2afc2 2470 *opened |= FILE_CREATED;
82be417a 2471
e911b815 2472 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2473 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2474 opendata->f_attr.mdsthreshold = NULL;
2475 }
82be417a 2476
14c43f76
DQ		 2477 nfs4_label_free(olabel);
2478
c6d00e63 2479 nfs4_opendata_put(opendata);
1da177e4 2480 nfs4_put_state_owner(sp);
1da177e4 2481 return 0;
14c43f76
DQ		 2482err_free_label:
2483 nfs4_label_free(olabel);
c6d00e63
TM		 2484err_opendata_put:
2485 nfs4_opendata_put(opendata);
e56e0b78
TM		 2486err_put_state_owner:
2487 nfs4_put_state_owner(sp);
1da177e4 2488out_err:
1da177e4
LT		 2489 return status;
2490}
2491
2492
82be417a 2493static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2494 struct nfs_open_context *ctx,
82be417a
AA		 2495 int flags,
2496 struct iattr *sattr,
5bc2afc2
TM		 2497 struct nfs4_label *label,
2498 int *opened)
1da177e4 2499{
49f9a0fa 2500 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2501 struct nfs4_exception exception = { };
2502 struct nfs4_state *res;
2503 int status;
2504
2505 do {
5bc2afc2 2506 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2507 res = ctx->state;
42113a75 2508 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2509 if (status == 0)
2510 break;
2511 /* NOTE: BAD_SEQID means the server and client disagree about the
2512 * book-keeping w.r.t. state-changing operations
2513 * (OPEN/CLOSE/LOCK/LOCKU...)
2514 * It is actually a sign of a bug on the client or on the server.
2515 *
2516 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2517 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2518 * have unhashed the old state_owner for us, and that we can
2519 * therefore safely retry using a new one. We should still warn
2520 * the user though...
2521 */
2522 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2523 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2524 " returned a bad sequence-id error!\n",
2525 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2526 exception.retry = 1;
2527 continue;
2528 }
550f5747
TM		 2529 /*
2530 * BAD_STATEID on OPEN means that the server cancelled our
2531 * state before it received the OPEN_CONFIRM.
2532 * Recover by retrying the request as per the discussion
2533 * on Page 181 of RFC3530.
2534 */
2535 if (status == -NFS4ERR_BAD_STATEID) {
2536 exception.retry = 1;
2537 continue;
2538 }
aac00a8d
TM		 2539 if (status == -EAGAIN) {
2540 /* We must have found a delegation */
2541 exception.retry = 1;
2542 continue;
2543 }
49f9a0fa
TM		 2544 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2545 continue;
2546 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2547 status, &exception));
2548 } while (exception.retry);
2549 return res;
2550}
2551
659bfcd6
TM		 2552static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2553 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2554 struct nfs4_state *state, struct nfs4_label *ilabel,
2555 struct nfs4_label *olabel)
1da177e4 2556{
3e4f6290 2557 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2558 struct nfs_setattrargs arg = {
3e4f6290 2559 .fh = NFS_FH(inode),
1da177e4
LT		 2560 .iap = sattr,
2561 .server = server,
2562 .bitmask = server->attr_bitmask,
1775fd3e 2563 .label = ilabel,
1da177e4
LT		 2564 };
2565 struct nfs_setattrres res = {
2566 .fattr = fattr,
1775fd3e 2567 .label = olabel,
1da177e4
LT		 2568 .server = server,
2569 };
2570 struct rpc_message msg = {
659bfcd6
TM		 2571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2572 .rpc_argp = &arg,
2573 .rpc_resp = &res,
2574 .rpc_cred = cred,
1da177e4 2575 };
26e976a8 2576 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2577 fmode_t fmode;
2578 bool truncate;
65e4308d 2579 int status;
1da177e4 2580
aa9c2669
DQ		 2581 arg.bitmask = nfs4_bitmask(server, ilabel);
2582 if (ilabel)
2583 arg.bitmask = nfs4_bitmask(server, olabel);
2584
0e574af1 2585 nfs_fattr_init(fattr);
1da177e4 2586
ee3ae84e
TM		 2587 /* Servers should only apply open mode checks for file size changes */
2588 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2589 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2590
2591 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2592 /* Use that stateid */
0418dae1 2593 } else if (truncate && state != NULL) {
2a369153
TM		 2594 struct nfs_lockowner lockowner = {
2595 .l_owner = current->files,
2596 .l_pid = current->tgid,
2597 };
0418dae1
TM		 2598 if (!nfs4_valid_open_stateid(state))
2599 return -EBADF;
2600 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2601 &lockowner) == -EIO)
2602 return -EBADF;
08e9eac4 2603 } else
f597c537 2604 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2605
7c513058 2606 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2607 if (status == 0 && state != NULL)
2608 renew_lease(server, timestamp);
65e4308d 2609 return status;
1da177e4
LT		 2610}
2611
659bfcd6
TM		 2612static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2613 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2614 struct nfs4_state *state, struct nfs4_label *ilabel,
2615 struct nfs4_label *olabel)
1da177e4 2616{
3e4f6290 2617 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2618 struct nfs4_exception exception = {
2619 .state = state,
3114ea7a 2620 .inode = inode,
a1d0b5ee 2621 };
1da177e4
LT		 2622 int err;
2623 do {
1775fd3e 2624 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2625 trace_nfs4_setattr(inode, err);
451146be
TM		 2626 switch (err) {
2627 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2628 if (!(sattr->ia_valid & ATTR_SIZE)) {
2629 pr_warn_once("NFSv4: server %s is incorrectly "
2630 "applying open mode checks to "
2631 "a SETATTR that is not "
2632 "changing file size.\n",
2633 server->nfs_client->cl_hostname);
2634 }
451146be
TM		 2635 if (state && !(state->state & FMODE_WRITE)) {
2636 err = -EBADF;
2637 if (sattr->ia_valid & ATTR_OPEN)
2638 err = -EACCES;
2639 goto out;
2640 }
2641 }
2642 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2643 } while (exception.retry);
451146be 2644out:
1da177e4
LT		 2645 return err;
2646}
2647
2648struct nfs4_closedata {
2649 struct inode *inode;
2650 struct nfs4_state *state;
2651 struct nfs_closeargs arg;
2652 struct nfs_closeres res;
516a6af6 2653 struct nfs_fattr fattr;
26e976a8 2654 unsigned long timestamp;
f7e8917a
FI		 2655 bool roc;
2656 u32 roc_barrier;
1da177e4
LT		 2657};
2658
963d8fe5 2659static void nfs4_free_closedata(void *data)
9512135d 2660{
963d8fe5
TM		 2661 struct nfs4_closedata *calldata = data;
2662 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2663 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2664
f7e8917a
FI		 2665 if (calldata->roc)
2666 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2667 nfs4_put_open_state(calldata->state);
2668 nfs_free_seqid(calldata->arg.seqid);
9512135d 2669 nfs4_put_state_owner(sp);
322b2b90 2670 nfs_sb_deactive(sb);
9512135d
TM		 2671 kfree(calldata);
2672}
2673
963d8fe5 2674static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2675{
963d8fe5 2676 struct nfs4_closedata *calldata = data;
1da177e4 2677 struct nfs4_state *state = calldata->state;
1da177e4 2678 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2679 nfs4_stateid *res_stateid = NULL;
1da177e4 2680
a3ca5651 2681 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2682 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2683 return;
42113a75 2684 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2685 /* hmm. we are done with the inode, and in the process of freeing
2686 * the state_owner. we keep this around to process errors
2687 */
1da177e4
LT		 2688 switch (task->tk_status) {
2689 case 0:
412f6c4c 2690 res_stateid = &calldata->res.stateid;
3c13cb5b 2691 if (calldata->roc)
f7e8917a
FI		 2692 pnfs_roc_set_barrier(state->inode,
2693 calldata->roc_barrier);
26e976a8 2694 renew_lease(server, calldata->timestamp);
412f6c4c 2695 break;
69794ad7 2696 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2697 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2698 case -NFS4ERR_OLD_STATEID:
2699 case -NFS4ERR_BAD_STATEID:
1da177e4 2700 case -NFS4ERR_EXPIRED:
566fcec6 2701 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2702 &state->open_stateid)) {
566fcec6
TM		 2703 rpc_restart_call_prepare(task);
2704 goto out_release;
2705 }
dc0b027d 2706 if (calldata->arg.fmode == 0)
9e33bed5 2707 break;
1da177e4 2708 default:
8478eaa1 2709 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2710 rpc_restart_call_prepare(task);
69794ad7
TM		 2711 goto out_release;
2712 }
1da177e4 2713 }
4a1e2feb
TM		 2714 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2715 res_stateid, calldata->arg.fmode);
69794ad7 2716out_release:
72211dbe 2717 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2718 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2719 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2720}
2721
4ce70ada 2722static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2723{
4ce70ada 2724 struct nfs4_closedata *calldata = data;
9512135d 2725 struct nfs4_state *state = calldata->state;
7fdab069 2726 struct inode *inode = calldata->inode;
aee7af35 2727 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2728 int call_close = 0;
9512135d 2729
a3ca5651 2730 dprintk("%s: begin!\n", __func__);
963d8fe5 2731 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2732 goto out_wait;
003707c7 2733
88069f77 2734 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2735 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2736 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2737 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2738 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2739 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2740 /* Calculate the change in open mode */
cd9288ff 2741 calldata->arg.fmode = 0;
e7616923 2742 if (state->n_rdwr == 0) {
cd9288ff
TM		 2743 if (state->n_rdonly == 0)
2744 call_close |= is_rdonly;
2745 else if (is_rdonly)
2746 calldata->arg.fmode |= FMODE_READ;
2747 if (state->n_wronly == 0)
2748 call_close |= is_wronly;
2749 else if (is_wronly)
2750 calldata->arg.fmode |= FMODE_WRITE;
2751 } else if (is_rdwr)
2752 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2753
2754 if (calldata->arg.fmode == 0)
2755 call_close |= is_rdwr;
2756
5d422301
TM		 2757 if (!nfs4_valid_open_stateid(state))
2758 call_close = 0;
4cecb76f 2759 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2760
2761 if (!call_close) {
963d8fe5 2762 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2763 goto out_no_action;
9512135d 2764 }
88069f77 2765
3c13cb5b 2766 if (calldata->arg.fmode == 0)
88069f77 2767 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2768 if (calldata->roc)
2769 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2770
6ae37339
TM		 2771 calldata->arg.share_access =
2772 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2773 calldata->arg.fmode, 0);
88069f77 2774
516a6af6 2775 nfs_fattr_init(calldata->res.fattr);
26e976a8 2776 calldata->timestamp = jiffies;
7fdab069 2777 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2778 &calldata->arg.seq_args,
2779 &calldata->res.seq_res,
2240a9e2
TM		 2780 task) != 0)
2781 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2782 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2783 return;
2784out_no_action:
2785 task->tk_action = NULL;
2786out_wait:
2787 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2788}
2789
963d8fe5 2790static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2791 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2792 .rpc_call_done = nfs4_close_done,
2793 .rpc_release = nfs4_free_closedata,
2794};
2795
fe08c546
PT		 2796static bool nfs4_roc(struct inode *inode)
2797{
40dd4b7a 2798 if (!nfs_have_layout(inode))
fe08c546 2799 return false;
fe08c546
PT		 2800 return pnfs_roc(inode);
2801}
2802
1da177e4
LT		 2803/*
2804 * It is possible for data to be read/written from a mem-mapped file
2805 * after the sys_close call (which hits the vfs layer as a flush).
2806 * This means that we can't safely call nfsv4 close on a file until
2807 * the inode is cleared. This in turn means that we are not good
2808 * NFSv4 citizens - we do not indicate to the server to update the file's
2809 * share state even when we are done with one of the three share
2810 * stateid's in the inode.
2811 *
2812 * NOTE: Caller must be holding the sp->so_owner semaphore!
2813 */
1f7977c1 2814int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2815{
4a35bd41 2816 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2817 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2818 struct nfs4_closedata *calldata;
b39e625b
TM		 2819 struct nfs4_state_owner *sp = state->owner;
2820 struct rpc_task *task;
5138fde0
TM		 2821 struct rpc_message msg = {
2822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2823 .rpc_cred = state->owner->so_cred,
2824 };
c970aa85
TM		 2825 struct rpc_task_setup task_setup_data = {
2826 .rpc_client = server->client,
5138fde0 2827 .rpc_message = &msg,
c970aa85 2828 .callback_ops = &nfs4_close_ops,
101070ca 2829 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2830 .flags = RPC_TASK_ASYNC,
2831 };
9512135d 2832 int status = -ENOMEM;
1da177e4 2833
fa940720
WAA		 2834 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2835 &task_setup_data.rpc_client, &msg);
2836
8535b2be 2837 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2838 if (calldata == NULL)
9512135d 2839 goto out;
a9c92d6b 2840 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2841 calldata->inode = state->inode;
1da177e4 2842 calldata->state = state;
4a35bd41 2843 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2844 /* Serialization for the sequence id */
63f5f796
TM		 2845 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2846 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2847 if (IS_ERR(calldata->arg.seqid))
9512135d 2848 goto out_free_calldata;
dc0b027d 2849 calldata->arg.fmode = 0;
a65318bf 2850 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2851 calldata->res.fattr = &calldata->fattr;
c1d51931 2852 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2853 calldata->res.server = server;
fe08c546 2854 calldata->roc = nfs4_roc(state->inode);
643168c2 2855 nfs_sb_active(calldata->inode->i_sb);
9512135d 2856
1174dd1f
TM		 2857 msg.rpc_argp = &calldata->arg;
2858 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2859 task_setup_data.callback_data = calldata;
2860 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2861 if (IS_ERR(task))
2862 return PTR_ERR(task);
a49c3c77
TM		 2863 status = 0;
2864 if (wait)
2865 status = rpc_wait_for_completion_task(task);
b39e625b 2866 rpc_put_task(task);
a49c3c77 2867 return status;
9512135d
TM		 2868out_free_calldata:
2869 kfree(calldata);
2870out:
b39e625b
TM		 2871 nfs4_put_open_state(state);
2872 nfs4_put_state_owner(sp);
9512135d 2873 return status;
1da177e4
LT		 2874}
2875
2b484297 2876static struct inode *
5bc2afc2
TM		 2877nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2878 int open_flags, struct iattr *attr, int *opened)
1da177e4 2879{
1da177e4 2880 struct nfs4_state *state;
aa9c2669
DQ		 2881 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2882
2883 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2884
565277f6 2885 /* Protect against concurrent sillydeletes */
5bc2afc2 2886 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2887
2888 nfs4_label_release_security(label);
2889
f46e0bd3
TM		 2890 if (IS_ERR(state))
2891 return ERR_CAST(state);
275bb307 2892 return state->inode;
1da177e4
LT		 2893}
2894
1185a552 2895static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2896{
2897 if (ctx->state == NULL)
2898 return;
2899 if (is_sync)
643168c2 2900 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2901 else
643168c2 2902 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2903}
1da177e4 2904
b944dba3
TM		 2905#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2906#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2907#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2908
1da177e4
LT		 2909static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2910{
8c61282f 2911 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 2912 struct nfs4_server_caps_arg args = {
2913 .fhandle = fhandle,
8c61282f 2914 .bitmask = bitmask,
43652ad5 2915 };
1da177e4
LT		 2916 struct nfs4_server_caps_res res = {};
2917 struct rpc_message msg = {
2918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2919 .rpc_argp = &args,
1da177e4
LT		 2920 .rpc_resp = &res,
2921 };
2922 int status;
2923
8c61282f
KM		 2924 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2925 FATTR4_WORD0_FH_EXPIRE_TYPE |
2926 FATTR4_WORD0_LINK_SUPPORT |
2927 FATTR4_WORD0_SYMLINK_SUPPORT |
2928 FATTR4_WORD0_ACLSUPPORT;
2929 if (minorversion)
2930 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2931
7c513058 2932 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2933 if (status == 0) {
b944dba3 2934 /* Sanity check the server answers */
8c61282f 2935 switch (minorversion) {
b944dba3
TM		 2936 case 0:
2937 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2938 res.attr_bitmask[2] = 0;
2939 break;
2940 case 1:
2941 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2942 break;
2943 case 2:
2944 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2945 }
1da177e4 2946 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2947 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2948 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2949 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2950 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2951 NFS_CAP_CTIME|NFS_CAP_MTIME|
2952 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2953 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2954 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2955 server->caps |= NFS_CAP_ACLS;
2956 if (res.has_links != 0)
2957 server->caps |= NFS_CAP_HARDLINKS;
2958 if (res.has_symlinks != 0)
2959 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2960 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2961 server->caps |= NFS_CAP_FILEID;
2962 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2963 server->caps |= NFS_CAP_MODE;
2964 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2965 server->caps |= NFS_CAP_NLINK;
2966 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2967 server->caps |= NFS_CAP_OWNER;
2968 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2969 server->caps |= NFS_CAP_OWNER_GROUP;
2970 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2971 server->caps |= NFS_CAP_ATIME;
2972 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2973 server->caps |= NFS_CAP_CTIME;
2974 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2975 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2976#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2977 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2978 server->caps |= NFS_CAP_SECURITY_LABEL;
2979#endif
2980 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2981 sizeof(server->attr_bitmask));
b944dba3 2982 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2983
a65318bf
TM		 2984 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2985 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2986 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2987 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 2988 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
2989 sizeof(server->exclcreat_bitmask));
1da177e4 2990 server->acl_bitmask = res.acl_bitmask;
264e6351 2991 server->fh_expire_type = res.fh_expire_type;
1da177e4 2992 }
cccef3b9 2993
1da177e4
LT		 2994 return status;
2995}
2996
55a97593 2997int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2998{
2999 struct nfs4_exception exception = { };
3000 int err;
3001 do {
3002 err = nfs4_handle_exception(server,
3003 _nfs4_server_capabilities(server, fhandle),
3004 &exception);
3005 } while (exception.retry);
3006 return err;
3007}
3008
3009static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3010 struct nfs_fsinfo *info)
3011{
aa9c2669 3012 u32 bitmask[3];
1da177e4 3013 struct nfs4_lookup_root_arg args = {
aa9c2669 3014 .bitmask = bitmask,
1da177e4
LT		 3015 };
3016 struct nfs4_lookup_res res = {
3017 .server = server,
0e574af1 3018 .fattr = info->fattr,
1da177e4
LT		 3019 .fh = fhandle,
3020 };
3021 struct rpc_message msg = {
3022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3023 .rpc_argp = &args,
3024 .rpc_resp = &res,
3025 };
008f55d0 3026
aa9c2669
DQ		 3027 bitmask[0] = nfs4_fattr_bitmap[0];
3028 bitmask[1] = nfs4_fattr_bitmap[1];
3029 /*
3030 * Process the label in the upcoming getfattr
3031 */
3032 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3033
0e574af1 3034 nfs_fattr_init(info->fattr);
7c513058 3035 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3036}
3037
3038static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3039 struct nfs_fsinfo *info)
3040{
3041 struct nfs4_exception exception = { };
3042 int err;
3043 do {
fb8a5ba8 3044 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3045 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3046 switch (err) {
3047 case 0:
3048 case -NFS4ERR_WRONGSEC:
05e9cfb4 3049 goto out;
fb8a5ba8
BS		 3050 default:
3051 err = nfs4_handle_exception(server, err, &exception);
3052 }
1da177e4 3053 } while (exception.retry);
05e9cfb4 3054out:
1da177e4
LT		 3055 return err;
3056}
3057
8f70e95f
BS		 3058static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3059 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3060{
c2190661
TM		 3061 struct rpc_auth_create_args auth_args = {
3062 .pseudoflavor = flavor,
3063 };
8f70e95f
BS		 3064 struct rpc_auth *auth;
3065 int ret;
3066
c2190661 3067 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3068 if (IS_ERR(auth)) {
75bc8821 3069 ret = -EACCES;
8f70e95f
BS		 3070 goto out;
3071 }
3072 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3073out:
3074 return ret;
3075}
3076
9a744ba3
CL		 3077/*
3078 * Retry pseudoroot lookup with various security flavors. We do this when:
3079 *
3080 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3081 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3082 *
3083 * Returns zero on success, or a negative NFS4ERR value, or a
3084 * negative errno value.
3085 */
801a16dc 3086static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3087 struct nfs_fsinfo *info)
1da177e4 3088{
9a744ba3
CL		 3089 /* Per 3530bis 15.33.5 */
3090 static const rpc_authflavor_t flav_array[] = {
3091 RPC_AUTH_GSS_KRB5P,
3092 RPC_AUTH_GSS_KRB5I,
3093 RPC_AUTH_GSS_KRB5,
c4eafe11 3094 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3095 RPC_AUTH_NULL,
3096 };
3097 int status = -EPERM;
3098 size_t i;
6a1a1e34 3099
4d4b69dd
WAA		 3100 if (server->auth_info.flavor_len > 0) {
3101 /* try each flavor specified by user */
3102 for (i = 0; i < server->auth_info.flavor_len; i++) {
3103 status = nfs4_lookup_root_sec(server, fhandle, info,
3104 server->auth_info.flavors[i]);
3105 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3106 continue;
3107 break;
3108 }
3109 } else {
3110 /* no flavors specified by user, try default list */
3111 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3112 status = nfs4_lookup_root_sec(server, fhandle, info,
3113 flav_array[i]);
3114 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3115 continue;
3116 break;
3117 }
8f70e95f 3118 }
9a744ba3 3119
fb8a5ba8
BS		 3120 /*
3121 * -EACCESS could mean that the user doesn't have correct permissions
3122 * to access the mount. It could also mean that we tried to mount
3123 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3124 * existing mount programs don't handle -EACCES very well so it should
3125 * be mapped to -EPERM instead.
3126 */
3127 if (status == -EACCES)
3128 status = -EPERM;
801a16dc
BS		 3129 return status;
3130}
3131
2ed4b95b
CL		 3132static int nfs4_do_find_root_sec(struct nfs_server *server,
3133 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3134{
3135 int mv = server->nfs_client->cl_minorversion;
3136 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3137}
3138
3139/**
3140 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3141 * @server: initialized nfs_server handle
3142 * @fhandle: we fill in the pseudo-fs root file handle
3143 * @info: we fill in an FSINFO struct
5e6b1990 3144 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3145 *
3146 * Returns zero on success, or a negative errno.
801a16dc 3147 */
3028eb2b 3148int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3149 struct nfs_fsinfo *info,
3150 bool auth_probe)
801a16dc 3151{
c7757074 3152 int status = 0;
2ed4b95b 3153
c7757074 3154 if (!auth_probe)
5e6b1990 3155 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3156
3157 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3158 status = nfs4_do_find_root_sec(server, fhandle, info);
3159
1da177e4
LT		 3160 if (status == 0)
3161 status = nfs4_server_capabilities(server, fhandle);
3162 if (status == 0)
3163 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3164
c12e87f4 3165 return nfs4_map_errors(status);
1da177e4
LT		 3166}
3167
bae36241
BS		 3168static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3169 struct nfs_fsinfo *info)
3170{
3171 int error;
3172 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3173 struct nfs4_label *label = NULL;
bae36241
BS		 3174
3175 error = nfs4_server_capabilities(server, mntfh);
3176 if (error < 0) {
3177 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3178 return error;
3179 }
3180
14c43f76
DQ		 3181 label = nfs4_label_alloc(server, GFP_KERNEL);
3182 if (IS_ERR(label))
3183 return PTR_ERR(label);
3184
1775fd3e 3185 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3186 if (error < 0) {
3187 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3188 goto err_free_label;
bae36241
BS		 3189 }
3190
3191 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3192 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3193 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3194
14c43f76
DQ		 3195err_free_label:
3196 nfs4_label_free(label);
3197
bae36241
BS		 3198 return error;
3199}
3200
6b97fd3d
MN		 3201/*
3202 * Get locations and (maybe) other attributes of a referral.
3203 * Note that we'll actually follow the referral later when
3204 * we detect fsid mismatch in inode revalidation
3205 */
f05d147f
BS		 3206static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3207 const struct qstr *name, struct nfs_fattr *fattr,
3208 struct nfs_fh *fhandle)
6b97fd3d
MN		 3209{
3210 int status = -ENOMEM;
3211 struct page *page = NULL;
3212 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3213
3214 page = alloc_page(GFP_KERNEL);
3215 if (page == NULL)
3216 goto out;
3217 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3218 if (locations == NULL)
3219 goto out;
3220
f05d147f 3221 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3222 if (status != 0)
3223 goto out;
519ae255
CL		 3224
3225 /*
3226 * If the fsid didn't change, this is a migration event, not a
3227 * referral. Cause us to drop into the exception handler, which
3228 * will kick off migration recovery.
3229 */
6b97fd3d 3230 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3231 dprintk("%s: server did not return a different fsid for"
3232 " a referral at %s\n", __func__, name->name);
519ae255 3233 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3234 goto out;
3235 }
533eb461
AA		 3236 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3237 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3238
533eb461 3239 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3240 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3241 memset(fhandle, 0, sizeof(struct nfs_fh));
3242out:
3243 if (page)
3244 __free_page(page);
5d7ca35a 3245 kfree(locations);
6b97fd3d
MN		 3246 return status;
3247}
3248
1775fd3e
DQ		 3249static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3250 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3251{
3252 struct nfs4_getattr_arg args = {
3253 .fh = fhandle,
3254 .bitmask = server->attr_bitmask,
3255 };
3256 struct nfs4_getattr_res res = {
3257 .fattr = fattr,
1775fd3e 3258 .label = label,
1da177e4
LT		 3259 .server = server,
3260 };
3261 struct rpc_message msg = {
3262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3263 .rpc_argp = &args,
3264 .rpc_resp = &res,
3265 };
aa9c2669
DQ		 3266
3267 args.bitmask = nfs4_bitmask(server, label);
3268
0e574af1 3269 nfs_fattr_init(fattr);
7c513058 3270 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3271}
3272
1775fd3e
DQ		 3273static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3274 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3275{
3276 struct nfs4_exception exception = { };
3277 int err;
3278 do {
b5f875a9
TM		 3279 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3280 trace_nfs4_getattr(server, fhandle, fattr, err);
3281 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3282 &exception);
3283 } while (exception.retry);
3284 return err;
3285}
3286
3287/*
3288 * The file is not closed if it is opened due to the a request to change
3289 * the size of the file. The open call will not be needed once the
3290 * VFS layer lookup-intents are implemented.
3291 *
3292 * Close is called when the inode is destroyed.
3293 * If we haven't opened the file for O_WRONLY, we
3294 * need to in the size_change case to obtain a stateid.
3295 *
3296 * Got race?
3297 * Because OPEN is always done by name in nfsv4, it is
3298 * possible that we opened a different file by the same
3299 * name. We can recognize this race condition, but we
3300 * can't do anything about it besides returning an error.
3301 *
3302 * This will be fixed with VFS changes (lookup-intent).
3303 */
3304static int
3305nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3306 struct iattr *sattr)
3307{
2b0143b5 3308 struct inode *inode = d_inode(dentry);
659bfcd6 3309 struct rpc_cred *cred = NULL;
d530838b 3310 struct nfs4_state *state = NULL;
14c43f76 3311 struct nfs4_label *label = NULL;
1da177e4
LT		 3312 int status;
3313
88ac815c
PT		 3314 if (pnfs_ld_layoutret_on_setattr(inode) &&
3315 sattr->ia_valid & ATTR_SIZE &&
3316 sattr->ia_size < i_size_read(inode))
24028672 3317 pnfs_commit_and_return_layout(inode);
8a1636c4 3318
0e574af1 3319 nfs_fattr_init(fattr);
1da177e4 3320
2669940d
AA		 3321 /* Deal with open(O_TRUNC) */
3322 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3323 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3324
3325 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3326 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3327 return 0;
3328
d530838b 3329 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3330 if (sattr->ia_valid & ATTR_FILE) {
3331 struct nfs_open_context *ctx;
3332
3333 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3334 if (ctx) {
3335 cred = ctx->cred;
3336 state = ctx->state;
3337 }
659bfcd6 3338 }
08e9eac4 3339
14c43f76
DQ		 3340 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3341 if (IS_ERR(label))
3342 return PTR_ERR(label);
3343
3344 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3345 if (status == 0) {
f044636d 3346 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3347 nfs_setsecurity(inode, fattr, label);
3348 }
14c43f76 3349 nfs4_label_free(label);
1da177e4
LT		 3350 return status;
3351}
3352
0c2e53f1
TM		 3353static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3354 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3355 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3356{
0c2e53f1 3357 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3358 int status;
3359 struct nfs4_lookup_arg args = {
3360 .bitmask = server->attr_bitmask,
0c2e53f1 3361 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3362 .name = name,
3363 };
3364 struct nfs4_lookup_res res = {
3365 .server = server,
3366 .fattr = fattr,
aa9c2669 3367 .label = label,
2b3de441
DH		 3368 .fh = fhandle,
3369 };
3370 struct rpc_message msg = {
3371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3372 .rpc_argp = &args,
3373 .rpc_resp = &res,
3374 };
3375
aa9c2669
DQ		 3376 args.bitmask = nfs4_bitmask(server, label);
3377
2b3de441
DH		 3378 nfs_fattr_init(fattr);
3379
1da177e4 3380 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3381 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3382 dprintk("NFS reply lookup: %d\n", status);
3383 return status;
3384}
3385
72de53ec 3386static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3387{
7ebb9315 3388 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3389 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3390 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3391 fattr->nlink = 2;
3392}
3393
72de53ec
BS		 3394static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3395 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3396 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3397{
3398 struct nfs4_exception exception = { };
72de53ec 3399 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3400 int err;
3401 do {
1775fd3e 3402 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3403 trace_nfs4_lookup(dir, name, err);
72de53ec 3404 switch (err) {
08ef7bd3 3405 case -NFS4ERR_BADNAME:
72de53ec
BS		 3406 err = -ENOENT;
3407 goto out;
0c2e53f1 3408 case -NFS4ERR_MOVED:
f05d147f 3409 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3410 if (err == -NFS4ERR_MOVED)
3411 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3412 goto out;
0c2e53f1 3413 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3414 err = -EPERM;
3415 if (client != *clnt)
3416 goto out;
66b06860 3417 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3418 if (IS_ERR(client))
3419 return PTR_ERR(client);
3420
3421 exception.retry = 1;
3422 break;
3423 default:
3424 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3425 }
1da177e4 3426 } while (exception.retry);
72de53ec
BS		 3427
3428out:
3429 if (err == 0)
3430 *clnt = client;
3431 else if (client != *clnt)
3432 rpc_shutdown_client(client);
3433
1da177e4
LT		 3434 return err;
3435}
3436
80a16b21 3437static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3438 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3439 struct nfs4_label *label)
72de53ec
BS		 3440{
3441 int status;
3442 struct rpc_clnt *client = NFS_CLIENT(dir);
3443
1775fd3e 3444 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3445 if (client != NFS_CLIENT(dir)) {
3446 rpc_shutdown_client(client);
3447 nfs_fixup_secinfo_attributes(fattr);
3448 }
3449 return status;
3450}
3451
f05d147f
BS		 3452struct rpc_clnt *
3453nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3454 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3455{
b72888cb 3456 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3457 int status;
f05d147f 3458
1775fd3e 3459 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3460 if (status < 0)
f05d147f 3461 return ERR_PTR(status);
b72888cb 3462 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3463}
3464
1da177e4
LT		 3465static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3466{
76b32999 3467 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3468 struct nfs4_accessargs args = {
3469 .fh = NFS_FH(inode),
a4980e78 3470 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3471 };
3472 struct nfs4_accessres res = {
3473 .server = server,
1da177e4 3474 };
1da177e4
LT		 3475 struct rpc_message msg = {
3476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3477 .rpc_argp = &args,
3478 .rpc_resp = &res,
3479 .rpc_cred = entry->cred,
3480 };
3481 int mode = entry->mask;
aa9c2669 3482 int status = 0;
1da177e4
LT		 3483
3484 /*
3485 * Determine which access bits we want to ask for...
3486 */
3487 if (mode & MAY_READ)
3488 args.access |= NFS4_ACCESS_READ;
3489 if (S_ISDIR(inode->i_mode)) {
3490 if (mode & MAY_WRITE)
3491 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3492 if (mode & MAY_EXEC)
3493 args.access |= NFS4_ACCESS_LOOKUP;
3494 } else {
3495 if (mode & MAY_WRITE)
3496 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3497 if (mode & MAY_EXEC)
3498 args.access |= NFS4_ACCESS_EXECUTE;
3499 }
c407d41a
TM		 3500
3501 res.fattr = nfs_alloc_fattr();
3502 if (res.fattr == NULL)
3503 return -ENOMEM;
3504
7c513058 3505 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3506 if (!status) {
6168f62c 3507 nfs_access_set_mask(entry, res.access);
c407d41a 3508 nfs_refresh_inode(inode, res.fattr);
1da177e4 3509 }
c407d41a 3510 nfs_free_fattr(res.fattr);
1da177e4
LT		 3511 return status;
3512}
3513
3514static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3515{
3516 struct nfs4_exception exception = { };
3517 int err;
3518 do {
c1578b76
TM		 3519 err = _nfs4_proc_access(inode, entry);
3520 trace_nfs4_access(inode, err);
3521 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3522 &exception);
3523 } while (exception.retry);
3524 return err;
3525}
3526
3527/*
3528 * TODO: For the time being, we don't try to get any attributes
3529 * along with any of the zero-copy operations READ, READDIR,
3530 * READLINK, WRITE.
3531 *
3532 * In the case of the first three, we want to put the GETATTR
3533 * after the read-type operation -- this is because it is hard
3534 * to predict the length of a GETATTR response in v4, and thus
3535 * align the READ data correctly. This means that the GETATTR
3536 * may end up partially falling into the page cache, and we should
3537 * shift it into the 'tail' of the xdr_buf before processing.
3538 * To do this efficiently, we need to know the total length
3539 * of data received, which doesn't seem to be available outside
3540 * of the RPC layer.
3541 *
3542 * In the case of WRITE, we also want to put the GETATTR after
3543 * the operation -- in this case because we want to make sure
140150db 3544 * we get the post-operation mtime and size.
1da177e4
LT		 3545 *
3546 * Both of these changes to the XDR layer would in fact be quite
3547 * minor, but I decided to leave them for a subsequent patch.
3548 */
3549static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3550 unsigned int pgbase, unsigned int pglen)
3551{
3552 struct nfs4_readlink args = {
3553 .fh = NFS_FH(inode),
3554 .pgbase = pgbase,
3555 .pglen = pglen,
3556 .pages = &page,
3557 };
f50c7000 3558 struct nfs4_readlink_res res;
1da177e4
LT		 3559 struct rpc_message msg = {
3560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3561 .rpc_argp = &args,
f50c7000 3562 .rpc_resp = &res,
1da177e4
LT		 3563 };
3564
7c513058 3565 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3566}
3567
3568static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3569 unsigned int pgbase, unsigned int pglen)
3570{
3571 struct nfs4_exception exception = { };
3572 int err;
3573 do {
c1578b76
TM		 3574 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3575 trace_nfs4_readlink(inode, err);
3576 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3577 &exception);
3578 } while (exception.retry);
3579 return err;
3580}
3581
1da177e4 3582/*
8867fe58 3583 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3584 */
1da177e4
LT		 3585static int
3586nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3587 int flags)
1da177e4 3588{
aa9c2669 3589 struct nfs4_label l, *ilabel = NULL;
8867fe58 3590 struct nfs_open_context *ctx;
1da177e4 3591 struct nfs4_state *state;
1da177e4
LT		 3592 int status = 0;
3593
8867fe58
MS		 3594 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3595 if (IS_ERR(ctx))
3596 return PTR_ERR(ctx);
3597
aa9c2669
DQ		 3598 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3599
a8a5da99 3600 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3601 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3602 if (IS_ERR(state)) {
3603 status = PTR_ERR(state);
c0204fd2 3604 goto out;
1da177e4 3605 }
1da177e4 3606out:
aa9c2669 3607 nfs4_label_release_security(ilabel);
8867fe58 3608 put_nfs_open_context(ctx);
1da177e4
LT		 3609 return status;
3610}
3611
3612static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3613{
16e42959 3614 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3615 struct nfs_removeargs args = {
1da177e4 3616 .fh = NFS_FH(dir),
26fe5750 3617 .name = *name,
16e42959 3618 };
4fdc17b2 3619 struct nfs_removeres res = {
16e42959 3620 .server = server,
1da177e4 3621 };
1da177e4 3622 struct rpc_message msg = {
4fdc17b2
TM		 3623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3624 .rpc_argp = &args,
3625 .rpc_resp = &res,
1da177e4 3626 };
778d2817 3627 int status;
1da177e4 3628
7c513058 3629 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3630 if (status == 0)
16e42959 3631 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3632 return status;
3633}
3634
3635static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3636{
3637 struct nfs4_exception exception = { };
3638 int err;
3639 do {
078ea3df
TM		 3640 err = _nfs4_proc_remove(dir, name);
3641 trace_nfs4_remove(dir, name, err);
3642 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3643 &exception);
3644 } while (exception.retry);
3645 return err;
3646}
3647
e4eff1a6 3648static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3649{
e4eff1a6
TM		 3650 struct nfs_server *server = NFS_SERVER(dir);
3651 struct nfs_removeargs *args = msg->rpc_argp;
3652 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3653
e4eff1a6 3654 res->server = server;
1da177e4 3655 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3656 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3657
3658 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3659}
3660
34e137cc
BS		 3661static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3662{
d9afbd1b
TM		 3663 nfs4_setup_sequence(NFS_SERVER(data->dir),
3664 &data->args.seq_args,
3665 &data->res.seq_res,
3666 task);
1da177e4
LT		 3667}
3668
e4eff1a6 3669static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3670{
078ea3df
TM		 3671 struct nfs_unlinkdata *data = task->tk_calldata;
3672 struct nfs_removeres *res = &data->res;
e4eff1a6 3673
14516c3a
TM		 3674 if (!nfs4_sequence_done(task, &res->seq_res))
3675 return 0;
8478eaa1
N		 3676 if (nfs4_async_handle_error(task, res->server, NULL,
3677 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3678 return 0;
3679 update_changeattr(dir, &res->cinfo);
e4eff1a6 3680 return 1;
1da177e4
LT		 3681}
3682
d3d4152a
JL		 3683static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3684{
3685 struct nfs_server *server = NFS_SERVER(dir);
3686 struct nfs_renameargs *arg = msg->rpc_argp;
3687 struct nfs_renameres *res = msg->rpc_resp;
3688
3689 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3690 res->server = server;
a9c92d6b 3691 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3692}
3693
c6bfa1a1
BS		 3694static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3695{
d9afbd1b
TM		 3696 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3697 &data->args.seq_args,
3698 &data->res.seq_res,
3699 task);
d3d4152a
JL		 3700}
3701
3702static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3703 struct inode *new_dir)
3704{
fbc6f7c2
TM		 3705 struct nfs_renamedata *data = task->tk_calldata;
3706 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3707
3708 if (!nfs4_sequence_done(task, &res->seq_res))
3709 return 0;
8478eaa1 3710 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3711 return 0;
3712
3713 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3714 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3715 return 1;
3716}
3717
1da177e4
LT		 3718static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3719{
91ba2eee 3720 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3721 struct nfs4_link_arg arg = {
3722 .fh = NFS_FH(inode),
3723 .dir_fh = NFS_FH(dir),
3724 .name = name,
91ba2eee
TM		 3725 .bitmask = server->attr_bitmask,
3726 };
91ba2eee
TM		 3727 struct nfs4_link_res res = {
3728 .server = server,
1775fd3e 3729 .label = NULL,
1da177e4 3730 };
1da177e4
LT		 3731 struct rpc_message msg = {
3732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3733 .rpc_argp = &arg,
91ba2eee 3734 .rpc_resp = &res,
1da177e4 3735 };
136f2627
TM		 3736 int status = -ENOMEM;
3737
3738 res.fattr = nfs_alloc_fattr();
778d2817 3739 if (res.fattr == NULL)
136f2627 3740 goto out;
1da177e4 3741
14c43f76
DQ		 3742 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3743 if (IS_ERR(res.label)) {
3744 status = PTR_ERR(res.label);
3745 goto out;
3746 }
aa9c2669 3747 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3748
7c513058 3749 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3750 if (!status) {
3751 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3752 status = nfs_post_op_update_inode(inode, res.fattr);
3753 if (!status)
3754 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3755 }
14c43f76
DQ		 3756
3757
3758 nfs4_label_free(res.label);
3759
136f2627 3760out:
136f2627 3761 nfs_free_fattr(res.fattr);
1da177e4
LT		 3762 return status;
3763}
3764
3765static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3766{
3767 struct nfs4_exception exception = { };
3768 int err;
3769 do {
3770 err = nfs4_handle_exception(NFS_SERVER(inode),
3771 _nfs4_proc_link(inode, dir, name),
3772 &exception);
3773 } while (exception.retry);
3774 return err;
3775}
3776
57dc9a57
TM		 3777struct nfs4_createdata {
3778 struct rpc_message msg;
3779 struct nfs4_create_arg arg;
3780 struct nfs4_create_res res;
3781 struct nfs_fh fh;
3782 struct nfs_fattr fattr;
1775fd3e 3783 struct nfs4_label *label;
57dc9a57
TM		 3784};
3785
3786static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3787 struct qstr *name, struct iattr *sattr, u32 ftype)
3788{
3789 struct nfs4_createdata *data;
3790
3791 data = kzalloc(sizeof(*data), GFP_KERNEL);
3792 if (data != NULL) {
3793 struct nfs_server *server = NFS_SERVER(dir);
3794
14c43f76
DQ		 3795 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3796 if (IS_ERR(data->label))
3797 goto out_free;
3798
57dc9a57
TM		 3799 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3800 data->msg.rpc_argp = &data->arg;
3801 data->msg.rpc_resp = &data->res;
3802 data->arg.dir_fh = NFS_FH(dir);
3803 data->arg.server = server;
3804 data->arg.name = name;
3805 data->arg.attrs = sattr;
3806 data->arg.ftype = ftype;
aa9c2669 3807 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3808 data->res.server = server;
3809 data->res.fh = &data->fh;
3810 data->res.fattr = &data->fattr;
1775fd3e 3811 data->res.label = data->label;
57dc9a57 3812 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3813 }
3814 return data;
14c43f76
DQ		 3815out_free:
3816 kfree(data);
3817 return NULL;
57dc9a57
TM		 3818}
3819
3820static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3821{
7c513058 3822 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3823 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3824 if (status == 0) {
3825 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3826 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3827 }
3828 return status;
3829}
3830
3831static void nfs4_free_createdata(struct nfs4_createdata *data)
3832{
14c43f76 3833 nfs4_label_free(data->label);
57dc9a57
TM		 3834 kfree(data);
3835}
3836
4f390c15 3837static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3838 struct page *page, unsigned int len, struct iattr *sattr,
3839 struct nfs4_label *label)
1da177e4 3840{
57dc9a57
TM		 3841 struct nfs4_createdata *data;
3842 int status = -ENAMETOOLONG;
1da177e4 3843
94a6d753 3844 if (len > NFS4_MAXPATHLEN)
57dc9a57 3845 goto out;
4f390c15 3846
57dc9a57
TM		 3847 status = -ENOMEM;
3848 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3849 if (data == NULL)
3850 goto out;
3851
3852 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3853 data->arg.u.symlink.pages = &page;
3854 data->arg.u.symlink.len = len;
1775fd3e 3855 data->arg.label = label;
1da177e4 3856
57dc9a57
TM		 3857 status = nfs4_do_create(dir, dentry, data);
3858
3859 nfs4_free_createdata(data);
3860out:
1da177e4
LT		 3861 return status;
3862}
3863
4f390c15 3864static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3865 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3866{
3867 struct nfs4_exception exception = { };
aa9c2669 3868 struct nfs4_label l, *label = NULL;
1da177e4 3869 int err;
aa9c2669
DQ		 3870
3871 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3872
1da177e4 3873 do {
078ea3df
TM		 3874 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3875 trace_nfs4_symlink(dir, &dentry->d_name, err);
3876 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3877 &exception);
3878 } while (exception.retry);
aa9c2669
DQ		 3879
3880 nfs4_label_release_security(label);
1da177e4
LT		 3881 return err;
3882}
3883
3884static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3885 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3886{
57dc9a57
TM		 3887 struct nfs4_createdata *data;
3888 int status = -ENOMEM;
1da177e4 3889
57dc9a57
TM		 3890 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3891 if (data == NULL)
3892 goto out;
3893
1775fd3e 3894 data->arg.label = label;
57dc9a57
TM		 3895 status = nfs4_do_create(dir, dentry, data);
3896
3897 nfs4_free_createdata(data);
3898out:
1da177e4
LT		 3899 return status;
3900}
3901
3902static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3903 struct iattr *sattr)
3904{
3905 struct nfs4_exception exception = { };
aa9c2669 3906 struct nfs4_label l, *label = NULL;
1da177e4 3907 int err;
a8a5da99 3908
aa9c2669
DQ		 3909 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3910
a8a5da99 3911 sattr->ia_mode &= ~current_umask();
1da177e4 3912 do {
078ea3df
TM		 3913 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3914 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3915 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3916 &exception);
3917 } while (exception.retry);
aa9c2669
DQ		 3918 nfs4_label_release_security(label);
3919
1da177e4
LT		 3920 return err;
3921}
3922
3923static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3924 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3925{
2b0143b5 3926 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3927 struct nfs4_readdir_arg args = {
3928 .fh = NFS_FH(dir),
56e4ebf8 3929 .pages = pages,
1da177e4
LT		 3930 .pgbase = 0,
3931 .count = count,
2b0143b5 3932 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3933 .plus = plus,
1da177e4
LT		 3934 };
3935 struct nfs4_readdir_res res;
3936 struct rpc_message msg = {
3937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3938 .rpc_argp = &args,
3939 .rpc_resp = &res,
3940 .rpc_cred = cred,
3941 };
3942 int status;
3943
6de1472f
AV		 3944 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3945 dentry,
eadf4598 3946 (unsigned long long)cookie);
c3f52af3 3947 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3948 res.pgbase = args.pgbase;
7c513058 3949 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3950 if (status >= 0) {
c3f52af3 3951 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3952 status += args.pgbase;
3953 }
c4812998
TM		 3954
3955 nfs_invalidate_atime(dir);
3956
3110ff80 3957 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3958 return status;
3959}
3960
3961static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3962 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3963{
3964 struct nfs4_exception exception = { };
3965 int err;
3966 do {
c1578b76
TM		 3967 err = _nfs4_proc_readdir(dentry, cred, cookie,
3968 pages, count, plus);
2b0143b5
DH		 3969 trace_nfs4_readdir(d_inode(dentry), err);
3970 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3971 &exception);
3972 } while (exception.retry);
3973 return err;
3974}
3975
3976static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3977 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3978{
57dc9a57
TM		 3979 struct nfs4_createdata *data;
3980 int mode = sattr->ia_mode;
3981 int status = -ENOMEM;
1da177e4 3982
57dc9a57
TM		 3983 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3984 if (data == NULL)
3985 goto out;
3986
1da177e4 3987 if (S_ISFIFO(mode))
57dc9a57 3988 data->arg.ftype = NF4FIFO;
1da177e4 3989 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3990 data->arg.ftype = NF4BLK;
3991 data->arg.u.device.specdata1 = MAJOR(rdev);
3992 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3993 }
3994 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3995 data->arg.ftype = NF4CHR;
3996 data->arg.u.device.specdata1 = MAJOR(rdev);
3997 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3998 } else if (!S_ISSOCK(mode)) {
3999 status = -EINVAL;
4000 goto out_free;
1da177e4 4001 }
1775fd3e 4002
aa9c2669 4003 data->arg.label = label;
57dc9a57 4004 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4005out_free:
57dc9a57
TM		 4006 nfs4_free_createdata(data);
4007out:
1da177e4
LT		 4008 return status;
4009}
4010
4011static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4012 struct iattr *sattr, dev_t rdev)
4013{
4014 struct nfs4_exception exception = { };
aa9c2669 4015 struct nfs4_label l, *label = NULL;
1da177e4 4016 int err;
a8a5da99 4017
aa9c2669
DQ		 4018 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4019
a8a5da99 4020 sattr->ia_mode &= ~current_umask();
1da177e4 4021 do {
078ea3df
TM		 4022 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4023 trace_nfs4_mknod(dir, &dentry->d_name, err);
4024 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4025 &exception);
4026 } while (exception.retry);
aa9c2669
DQ		 4027
4028 nfs4_label_release_security(label);
4029
1da177e4
LT		 4030 return err;
4031}
4032
4033static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4034 struct nfs_fsstat *fsstat)
4035{
4036 struct nfs4_statfs_arg args = {
4037 .fh = fhandle,
4038 .bitmask = server->attr_bitmask,
4039 };
24ad148a
BH		 4040 struct nfs4_statfs_res res = {
4041 .fsstat = fsstat,
4042 };
1da177e4
LT		 4043 struct rpc_message msg = {
4044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4045 .rpc_argp = &args,
24ad148a 4046 .rpc_resp = &res,
1da177e4
LT		 4047 };
4048
0e574af1 4049 nfs_fattr_init(fsstat->fattr);
7c513058 4050 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4051}
4052
4053static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4054{
4055 struct nfs4_exception exception = { };
4056 int err;
4057 do {
4058 err = nfs4_handle_exception(server,
4059 _nfs4_proc_statfs(server, fhandle, fsstat),
4060 &exception);
4061 } while (exception.retry);
4062 return err;
4063}
4064
4065static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4066 struct nfs_fsinfo *fsinfo)
4067{
4068 struct nfs4_fsinfo_arg args = {
4069 .fh = fhandle,
4070 .bitmask = server->attr_bitmask,
4071 };
3dda5e43
BH		 4072 struct nfs4_fsinfo_res res = {
4073 .fsinfo = fsinfo,
4074 };
1da177e4
LT		 4075 struct rpc_message msg = {
4076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4077 .rpc_argp = &args,
3dda5e43 4078 .rpc_resp = &res,
1da177e4
LT		 4079 };
4080
7c513058 4081 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4082}
4083
4084static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4085{
4086 struct nfs4_exception exception = { };
83ca7f5a 4087 unsigned long now = jiffies;
1da177e4
LT		 4088 int err;
4089
4090 do {
83ca7f5a 4091 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4092 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4093 if (err == 0) {
4094 struct nfs_client *clp = server->nfs_client;
4095
4096 spin_lock(&clp->cl_lock);
4097 clp->cl_lease_time = fsinfo->lease_time * HZ;
4098 clp->cl_last_renewal = now;
4099 spin_unlock(&clp->cl_lock);
4100 break;
4101 }
4102 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4103 } while (exception.retry);
4104 return err;
4105}
4106
4107static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4108{
e38eb650
BS		 4109 int error;
4110
0e574af1 4111 nfs_fattr_init(fsinfo->fattr);
e38eb650 4112 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4113 if (error == 0) {
4114 /* block layout checks this! */
4115 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4116 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4117 }
e38eb650
BS		 4118
4119 return error;
1da177e4
LT		 4120}
4121
4122static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4123 struct nfs_pathconf *pathconf)
4124{
4125 struct nfs4_pathconf_arg args = {
4126 .fh = fhandle,
4127 .bitmask = server->attr_bitmask,
4128 };
d45b2989
BH		 4129 struct nfs4_pathconf_res res = {
4130 .pathconf = pathconf,
4131 };
1da177e4
LT		 4132 struct rpc_message msg = {
4133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4134 .rpc_argp = &args,
d45b2989 4135 .rpc_resp = &res,
1da177e4
LT		 4136 };
4137
4138 /* None of the pathconf attributes are mandatory to implement */
4139 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4140 memset(pathconf, 0, sizeof(*pathconf));
4141 return 0;
4142 }
4143
0e574af1 4144 nfs_fattr_init(pathconf->fattr);
7c513058 4145 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4146}
4147
4148static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4149 struct nfs_pathconf *pathconf)
4150{
4151 struct nfs4_exception exception = { };
4152 int err;
4153
4154 do {
4155 err = nfs4_handle_exception(server,
4156 _nfs4_proc_pathconf(server, fhandle, pathconf),
4157 &exception);
4158 } while (exception.retry);
4159 return err;
4160}
4161
5521abfd 4162int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4163 const struct nfs_open_context *ctx,
4164 const struct nfs_lock_context *l_ctx,
4165 fmode_t fmode)
4166{
4167 const struct nfs_lockowner *lockowner = NULL;
4168
4169 if (l_ctx != NULL)
4170 lockowner = &l_ctx->lockowner;
5521abfd 4171 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4172}
4173EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4174
5521abfd
TM		 4175static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4176 const struct nfs_open_context *ctx,
4177 const struct nfs_lock_context *l_ctx,
4178 fmode_t fmode)
4179{
4180 nfs4_stateid current_stateid;
4181
e1253be0
TM		 4182 /* If the current stateid represents a lost lock, then exit */
4183 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4184 return true;
5521abfd
TM		 4185 return nfs4_stateid_match(stateid, &current_stateid);
4186}
4187
4188static bool nfs4_error_stateid_expired(int err)
4189{
4190 switch (err) {
4191 case -NFS4ERR_DELEG_REVOKED:
4192 case -NFS4ERR_ADMIN_REVOKED:
4193 case -NFS4ERR_BAD_STATEID:
4194 case -NFS4ERR_STALE_STATEID:
4195 case -NFS4ERR_OLD_STATEID:
4196 case -NFS4ERR_OPENMODE:
4197 case -NFS4ERR_EXPIRED:
4198 return true;
4199 }
4200 return false;
4201}
4202
d45f60c6 4203void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4204{
d45f60c6 4205 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4206}
4207
d45f60c6 4208static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4209{
d45f60c6 4210 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4211
d45f60c6
WAA		 4212 trace_nfs4_read(hdr, task->tk_status);
4213 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4214 hdr->args.context->state,
4215 NULL) == -EAGAIN) {
d00c5d43 4216 rpc_restart_call_prepare(task);
ec06c096 4217 return -EAGAIN;
1da177e4 4218 }
8850df99 4219
d45f60c6 4220 __nfs4_read_done_cb(hdr);
1da177e4 4221 if (task->tk_status > 0)
d45f60c6 4222 renew_lease(server, hdr->timestamp);
ec06c096 4223 return 0;
1da177e4
LT		 4224}
4225
5521abfd 4226static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4227 struct nfs_pgio_args *args)
5521abfd
TM		 4228{
4229
4230 if (!nfs4_error_stateid_expired(task->tk_status) ||
4231 nfs4_stateid_is_current(&args->stateid,
4232 args->context,
4233 args->lock_context,
4234 FMODE_READ))
4235 return false;
4236 rpc_restart_call_prepare(task);
4237 return true;
4238}
4239
d45f60c6 4240static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4241{
4242
4243 dprintk("--> %s\n", __func__);
4244
d45f60c6 4245 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4246 return -EAGAIN;
d45f60c6 4247 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4248 return -EAGAIN;
d45f60c6
WAA		 4249 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4250 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4251}
4252
d45f60c6
WAA		 4253static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4254 struct rpc_message *msg)
1da177e4 4255{
d45f60c6
WAA		 4256 hdr->timestamp = jiffies;
4257 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4258 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4259 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4260}
4261
d45f60c6
WAA		 4262static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4263 struct nfs_pgio_header *hdr)
ea7c3303 4264{
d45f60c6
WAA		 4265 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4266 &hdr->args.seq_args,
4267 &hdr->res.seq_res,
9b206149 4268 task))
ef1820f9 4269 return 0;
d45f60c6
WAA		 4270 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4271 hdr->args.lock_context,
4272 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4273 return -EIO;
d45f60c6 4274 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4275 return -EIO;
4276 return 0;
1da177e4
LT		 4277}
4278
d45f60c6
WAA		 4279static int nfs4_write_done_cb(struct rpc_task *task,
4280 struct nfs_pgio_header *hdr)
1da177e4 4281{
d45f60c6 4282 struct inode *inode = hdr->inode;
8478eaa1 4283
d45f60c6
WAA		 4284 trace_nfs4_write(hdr, task->tk_status);
4285 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4286 hdr->args.context->state,
4287 NULL) == -EAGAIN) {
d00c5d43 4288 rpc_restart_call_prepare(task);
788e7a89 4289 return -EAGAIN;
1da177e4 4290 }
4f9838c7 4291 if (task->tk_status >= 0) {
d45f60c6 4292 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4293 nfs_writeback_update_inode(hdr);
4f9838c7 4294 }
788e7a89 4295 return 0;
1da177e4
LT		 4296}
4297
5521abfd 4298static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4299 struct nfs_pgio_args *args)
5521abfd
TM		 4300{
4301
4302 if (!nfs4_error_stateid_expired(task->tk_status) ||
4303 nfs4_stateid_is_current(&args->stateid,
4304 args->context,
4305 args->lock_context,
4306 FMODE_WRITE))
4307 return false;
4308 rpc_restart_call_prepare(task);
4309 return true;
4310}
4311
d45f60c6 4312static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4313{
d45f60c6 4314 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4315 return -EAGAIN;
d45f60c6 4316 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4317 return -EAGAIN;
d45f60c6
WAA		 4318 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4319 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4320}
4321
5a37f851 4322static
d45f60c6 4323bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4324{
5a37f851 4325 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4326 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4327 return false;
4328 /* Otherwise, request attributes if and only if we don't hold
4329 * a delegation
4330 */
011e2a7f 4331 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4332}
a69aef14 4333
d45f60c6
WAA		 4334static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4335 struct rpc_message *msg)
1da177e4 4336{
d45f60c6 4337 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4338
d45f60c6
WAA		 4339 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4340 hdr->args.bitmask = NULL;
4341 hdr->res.fattr = NULL;
7ffd1064 4342 } else
d45f60c6 4343 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4344
d45f60c6
WAA		 4345 if (!hdr->pgio_done_cb)
4346 hdr->pgio_done_cb = nfs4_write_done_cb;
4347 hdr->res.server = server;
4348 hdr->timestamp = jiffies;
1da177e4 4349
bdc7f021 4350 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4351 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4352}
4353
0b7c0153 4354static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4355{
d9afbd1b
TM		 4356 nfs4_setup_sequence(NFS_SERVER(data->inode),
4357 &data->args.seq_args,
4358 &data->res.seq_res,
4359 task);
1da177e4
LT		 4360}
4361
0b7c0153 4362static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4363{
1da177e4 4364 struct inode *inode = data->inode;
14516c3a 4365
cc668ab3 4366 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4367 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4368 NULL, NULL) == -EAGAIN) {
d00c5d43 4369 rpc_restart_call_prepare(task);
788e7a89 4370 return -EAGAIN;
1da177e4 4371 }
788e7a89 4372 return 0;
1da177e4
LT		 4373}
4374
0b7c0153 4375static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4376{
4377 if (!nfs4_sequence_done(task, &data->res.seq_res))
4378 return -EAGAIN;
0b7c0153 4379 return data->commit_done_cb(task, data);
5f452431
FI		 4380}
4381
0b7c0153 4382static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4383{
788e7a89 4384 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4385
0b7c0153
FI		 4386 if (data->commit_done_cb == NULL)
4387 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4388 data->res.server = server;
bdc7f021 4389 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4390 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4391}
4392
9bc4e3ca
CL		 4393struct nfs4_renewdata {
4394 struct nfs_client *client;
4395 unsigned long timestamp;
4396};
4397
1da177e4
LT		 4398/*
4399 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4400 * standalone procedure for queueing an asynchronous RENEW.
4401 */
9bc4e3ca 4402static void nfs4_renew_release(void *calldata)
dc96aef9 4403{
9bc4e3ca
CL		 4404 struct nfs4_renewdata *data = calldata;
4405 struct nfs_client *clp = data->client;
dc96aef9 4406
0851de06
AB		 4407 if (atomic_read(&clp->cl_count) > 1)
4408 nfs4_schedule_state_renewal(clp);
4409 nfs_put_client(clp);
9bc4e3ca 4410 kfree(data);
dc96aef9
AB		 4411}
4412
9bc4e3ca 4413static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4414{
9bc4e3ca
CL		 4415 struct nfs4_renewdata *data = calldata;
4416 struct nfs_client *clp = data->client;
4417 unsigned long timestamp = data->timestamp;
1da177e4 4418
c6d01c6f 4419 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4420 switch (task->tk_status) {
4421 case 0:
4422 break;
4423 case -NFS4ERR_LEASE_MOVED:
4424 nfs4_schedule_lease_moved_recovery(clp);
4425 break;
4426 default:
95baa25c 4427 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4428 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4429 return;
4430 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4431 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4432 return;
4433 }
4434 nfs4_schedule_path_down_recovery(clp);
1da177e4 4435 }
452e9352 4436 do_renew_lease(clp, timestamp);
1da177e4
LT		 4437}
4438
963d8fe5
TM		 4439static const struct rpc_call_ops nfs4_renew_ops = {
4440 .rpc_call_done = nfs4_renew_done,
dc96aef9 4441 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4442};
4443
2f60ea6b 4444static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4445{
4446 struct rpc_message msg = {
4447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4448 .rpc_argp = clp,
b4454fe1 4449 .rpc_cred = cred,
1da177e4 4450 };
9bc4e3ca 4451 struct nfs4_renewdata *data;
1da177e4 4452
2f60ea6b
TM		 4453 if (renew_flags == 0)
4454 return 0;
0851de06
AB		 4455 if (!atomic_inc_not_zero(&clp->cl_count))
4456 return -EIO;
b569ad34 4457 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4458 if (data == NULL)
4459 return -ENOMEM;
4460 data->client = clp;
4461 data->timestamp = jiffies;
bc7a05ca 4462 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4463 &nfs4_renew_ops, data);
1da177e4
LT		 4464}
4465
8534d4ec 4466static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4467{
4468 struct rpc_message msg = {
4469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4470 .rpc_argp = clp,
b4454fe1 4471 .rpc_cred = cred,
1da177e4
LT		 4472 };
4473 unsigned long now = jiffies;
4474 int status;
4475
bc7a05ca 4476 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4477 if (status < 0)
4478 return status;
452e9352 4479 do_renew_lease(clp, now);
1da177e4
LT		 4480 return 0;
4481}
4482
aa1870af
BF		 4483static inline int nfs4_server_supports_acls(struct nfs_server *server)
4484{
7dd7d959 4485 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4486}
4487
21f498c2
TM		 4488/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4489 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4490 * the stack.
4491 */
21f498c2 4492#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4493
e9e3d724
NH		 4494static int buf_to_pages_noslab(const void *buf, size_t buflen,
4495 struct page **pages, unsigned int *pgbase)
4496{
4497 struct page *newpage, **spages;
4498 int rc = 0;
4499 size_t len;
4500 spages = pages;
4501
4502 do {
21f498c2 4503 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4504 newpage = alloc_page(GFP_KERNEL);
4505
4506 if (newpage == NULL)
4507 goto unwind;
4508 memcpy(page_address(newpage), buf, len);
4509 buf += len;
4510 buflen -= len;
4511 *pages++ = newpage;
4512 rc++;
4513 } while (buflen != 0);
4514
4515 return rc;
4516
4517unwind:
4518 for(; rc > 0; rc--)
4519 __free_page(spages[rc-1]);
4520 return -ENOMEM;
4521}
4522
e50a1c2e
BF		 4523struct nfs4_cached_acl {
4524 int cached;
4525 size_t len;
3e9d4154 4526 char data[0];
e50a1c2e
BF		 4527};
4528
4529static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4530{
4531 struct nfs_inode *nfsi = NFS_I(inode);
4532
4533 spin_lock(&inode->i_lock);
4534 kfree(nfsi->nfs4_acl);
4535 nfsi->nfs4_acl = acl;
4536 spin_unlock(&inode->i_lock);
4537}
4538
4539static void nfs4_zap_acl_attr(struct inode *inode)
4540{
4541 nfs4_set_cached_acl(inode, NULL);
4542}
4543
4544static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4545{
4546 struct nfs_inode *nfsi = NFS_I(inode);
4547 struct nfs4_cached_acl *acl;
4548 int ret = -ENOENT;
4549
4550 spin_lock(&inode->i_lock);
4551 acl = nfsi->nfs4_acl;
4552 if (acl == NULL)
4553 goto out;
4554 if (buf == NULL) /* user is just asking for length */
4555 goto out_len;
4556 if (acl->cached == 0)
4557 goto out;
4558 ret = -ERANGE; /* see getxattr(2) man page */
4559 if (acl->len > buflen)
4560 goto out;
4561 memcpy(buf, acl->data, acl->len);
4562out_len:
4563 ret = acl->len;
4564out:
4565 spin_unlock(&inode->i_lock);
4566 return ret;
4567}
4568
5794d21e 4569static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4570{
4571 struct nfs4_cached_acl *acl;
b291f1b1 4572 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4573
1f1ea6c2 4574 if (buflen <= PAGE_SIZE) {
b291f1b1 4575 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4576 if (acl == NULL)
4577 goto out;
4578 acl->cached = 1;
5794d21e 4579 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4580 } else {
4581 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4582 if (acl == NULL)
4583 goto out;
4584 acl->cached = 0;
4585 }
4586 acl->len = acl_len;
4587out:
4588 nfs4_set_cached_acl(inode, acl);
4589}
4590
bf118a34
AA		 4591/*
4592 * The getxattr API returns the required buffer length when called with a
4593 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4594 * the required buf. On a NULL buf, we send a page of data to the server
4595 * guessing that the ACL request can be serviced by a page. If so, we cache
4596 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4597 * the cache. If not so, we throw away the page, and cache the required
4598 * length. The next getxattr call will then produce another round trip to
4599 * the server, this time with the input buf of the required size.
4600 */
16b4289c 4601static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4602{
bf118a34 4603 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4604 struct nfs_getaclargs args = {
4605 .fh = NFS_FH(inode),
4606 .acl_pages = pages,
4607 .acl_len = buflen,
4608 };
663c79b3
BH		 4609 struct nfs_getaclres res = {
4610 .acl_len = buflen,
4611 };
aa1870af
BF		 4612 struct rpc_message msg = {
4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4614 .rpc_argp = &args,
663c79b3 4615 .rpc_resp = &res,
aa1870af 4616 };
21f498c2
TM		 4617 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4618 int ret = -ENOMEM, i;
aa1870af 4619
bf118a34
AA		 4620 /* As long as we're doing a round trip to the server anyway,
4621 * let's be prepared for a page of acl data. */
4622 if (npages == 0)
4623 npages = 1;
21f498c2
TM		 4624 if (npages > ARRAY_SIZE(pages))
4625 return -ERANGE;
5a006899 4626
bf118a34
AA		 4627 for (i = 0; i < npages; i++) {
4628 pages[i] = alloc_page(GFP_KERNEL);
4629 if (!pages[i])
4630 goto out_free;
e50a1c2e 4631 }
5a006899
SP		 4632
4633 /* for decoding across pages */
4634 res.acl_scratch = alloc_page(GFP_KERNEL);
4635 if (!res.acl_scratch)
4636 goto out_free;
4637
bf118a34
AA		 4638 args.acl_len = npages * PAGE_SIZE;
4639 args.acl_pgbase = 0;
5a006899 4640
de040bec 4641 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4642 __func__, buf, buflen, npages, args.acl_len);
4643 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4644 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4645 if (ret)
4646 goto out_free;
bf118a34 4647
1f1ea6c2
TM		 4648 /* Handle the case where the passed-in buffer is too short */
4649 if (res.acl_flags & NFS4_ACL_TRUNC) {
4650 /* Did the user only issue a request for the acl length? */
4651 if (buf == NULL)
4652 goto out_ok;
e50a1c2e 4653 ret = -ERANGE;
1f1ea6c2 4654 goto out_free;
e50a1c2e 4655 }
1f1ea6c2 4656 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4657 if (buf) {
4658 if (res.acl_len > buflen) {
4659 ret = -ERANGE;
4660 goto out_free;
4661 }
1f1ea6c2 4662 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4663 }
1f1ea6c2
TM		 4664out_ok:
4665 ret = res.acl_len;
e50a1c2e 4666out_free:
bf118a34
AA		 4667 for (i = 0; i < npages; i++)
4668 if (pages[i])
4669 __free_page(pages[i]);
331818f1
TM		 4670 if (res.acl_scratch)
4671 __free_page(res.acl_scratch);
aa1870af
BF		 4672 return ret;
4673}
4674
16b4289c
TM		 4675static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4676{
4677 struct nfs4_exception exception = { };
4678 ssize_t ret;
4679 do {
4680 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4681 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4682 if (ret >= 0)
4683 break;
4684 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4685 } while (exception.retry);
4686 return ret;
4687}
4688
e50a1c2e
BF		 4689static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4690{
4691 struct nfs_server *server = NFS_SERVER(inode);
4692 int ret;
4693
4694 if (!nfs4_server_supports_acls(server))
4695 return -EOPNOTSUPP;
4696 ret = nfs_revalidate_inode(server, inode);
4697 if (ret < 0)
4698 return ret;
08a22b39
AK		 4699 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4700 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4701 ret = nfs4_read_cached_acl(inode, buf, buflen);
4702 if (ret != -ENOENT)
bf118a34
AA		 4703 /* -ENOENT is returned if there is no ACL or if there is an ACL
4704 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4705 return ret;
4706 return nfs4_get_acl_uncached(inode, buf, buflen);
4707}
4708
16b4289c 4709static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4710{
4711 struct nfs_server *server = NFS_SERVER(inode);
4712 struct page *pages[NFS4ACL_MAXPAGES];
4713 struct nfs_setaclargs arg = {
4714 .fh = NFS_FH(inode),
4715 .acl_pages = pages,
4716 .acl_len = buflen,
4717 };
73c403a9 4718 struct nfs_setaclres res;
4b580ee3
BF		 4719 struct rpc_message msg = {
4720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4721 .rpc_argp = &arg,
73c403a9 4722 .rpc_resp = &res,
4b580ee3 4723 };
21f498c2 4724 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4725 int ret, i;
4b580ee3
BF		 4726
4727 if (!nfs4_server_supports_acls(server))
4728 return -EOPNOTSUPP;
21f498c2
TM		 4729 if (npages > ARRAY_SIZE(pages))
4730 return -ERANGE;
e9e3d724
NH		 4731 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4732 if (i < 0)
4733 return i;
57ec14c5 4734 nfs4_inode_return_delegation(inode);
7c513058 4735 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4736
4737 /*
4738 * Free each page after tx, so the only ref left is
4739 * held by the network stack
4740 */
4741 for (; i > 0; i--)
4742 put_page(pages[i-1]);
4743
08a22b39
AK		 4744 /*
4745 * Acl update can result in inode attribute update.
4746 * so mark the attribute cache invalid.
4747 */
4748 spin_lock(&inode->i_lock);
4749 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4750 spin_unlock(&inode->i_lock);
f41f7418
TM		 4751 nfs_access_zap_cache(inode);
4752 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4753 return ret;
4754}
4755
16b4289c
TM		 4756static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4757{
4758 struct nfs4_exception exception = { };
4759 int err;
4760 do {
c1578b76
TM		 4761 err = __nfs4_proc_set_acl(inode, buf, buflen);
4762 trace_nfs4_set_acl(inode, err);
4763 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4764 &exception);
4765 } while (exception.retry);
4766 return err;
4767}
4768
aa9c2669
DQ		 4769#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4770static int _nfs4_get_security_label(struct inode *inode, void *buf,
4771 size_t buflen)
4772{
4773 struct nfs_server *server = NFS_SERVER(inode);
4774 struct nfs_fattr fattr;
4775 struct nfs4_label label = {0, 0, buflen, buf};
4776
4777 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4778 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4779 .fh = NFS_FH(inode),
4780 .bitmask = bitmask,
4781 };
4782 struct nfs4_getattr_res res = {
4783 .fattr = &fattr,
4784 .label = &label,
4785 .server = server,
4786 };
4787 struct rpc_message msg = {
4788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4789 .rpc_argp = &arg,
aa9c2669
DQ		 4790 .rpc_resp = &res,
4791 };
4792 int ret;
4793
4794 nfs_fattr_init(&fattr);
4795
fcb63a9b 4796 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4797 if (ret)
4798 return ret;
4799 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4800 return -ENOENT;
4801 if (buflen < label.len)
4802 return -ERANGE;
4803 return 0;
4804}
4805
4806static int nfs4_get_security_label(struct inode *inode, void *buf,
4807 size_t buflen)
4808{
4809 struct nfs4_exception exception = { };
4810 int err;
4811
4812 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4813 return -EOPNOTSUPP;
4814
4815 do {
c1578b76
TM		 4816 err = _nfs4_get_security_label(inode, buf, buflen);
4817 trace_nfs4_get_security_label(inode, err);
4818 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4819 &exception);
4820 } while (exception.retry);
4821 return err;
4822}
4823
4824static int _nfs4_do_set_security_label(struct inode *inode,
4825 struct nfs4_label *ilabel,
4826 struct nfs_fattr *fattr,
4827 struct nfs4_label *olabel)
4828{
4829
4830 struct iattr sattr = {0};
4831 struct nfs_server *server = NFS_SERVER(inode);
4832 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4833 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4834 .fh = NFS_FH(inode),
4835 .iap = &sattr,
4836 .server = server,
4837 .bitmask = bitmask,
4838 .label = ilabel,
4839 };
4840 struct nfs_setattrres res = {
4841 .fattr = fattr,
4842 .label = olabel,
4843 .server = server,
4844 };
4845 struct rpc_message msg = {
4846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4847 .rpc_argp = &arg,
aa9c2669
DQ		 4848 .rpc_resp = &res,
4849 };
4850 int status;
4851
12207f69 4852 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4853
12207f69 4854 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4855 if (status)
4856 dprintk("%s failed: %d\n", __func__, status);
4857
4858 return status;
4859}
4860
4861static int nfs4_do_set_security_label(struct inode *inode,
4862 struct nfs4_label *ilabel,
4863 struct nfs_fattr *fattr,
4864 struct nfs4_label *olabel)
4865{
4866 struct nfs4_exception exception = { };
4867 int err;
4868
4869 do {
c1578b76
TM		 4870 err = _nfs4_do_set_security_label(inode, ilabel,
4871 fattr, olabel);
4872 trace_nfs4_set_security_label(inode, err);
4873 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4874 &exception);
4875 } while (exception.retry);
4876 return err;
4877}
4878
4879static int
4880nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4881{
4882 struct nfs4_label ilabel, *olabel = NULL;
4883 struct nfs_fattr fattr;
4884 struct rpc_cred *cred;
2b0143b5 4885 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4886 int status;
4887
4888 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4889 return -EOPNOTSUPP;
4890
4891 nfs_fattr_init(&fattr);
4892
4893 ilabel.pi = 0;
4894 ilabel.lfs = 0;
4895 ilabel.label = (char *)buf;
4896 ilabel.len = buflen;
4897
4898 cred = rpc_lookup_cred();
4899 if (IS_ERR(cred))
4900 return PTR_ERR(cred);
4901
4902 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4903 if (IS_ERR(olabel)) {
4904 status = -PTR_ERR(olabel);
4905 goto out;
4906 }
4907
4908 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4909 if (status == 0)
4910 nfs_setsecurity(inode, &fattr, olabel);
4911
4912 nfs4_label_free(olabel);
4913out:
4914 put_rpccred(cred);
4915 return status;
4916}
4917#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4918
4919
1da177e4 4920static int
8478eaa1
N		 4921nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4922 struct nfs4_state *state, long *timeout)
1da177e4 4923{
aa5190d0
TM		 4924 struct nfs_client *clp = server->nfs_client;
4925
4926 if (task->tk_status >= 0)
1da177e4
LT		 4927 return 0;
4928 switch(task->tk_status) {
a1d0b5ee 4929 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4930 case -NFS4ERR_ADMIN_REVOKED:
4931 case -NFS4ERR_BAD_STATEID:
4932 case -NFS4ERR_OPENMODE:
4933 if (state == NULL)
4934 break;
5d422301 4935 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4936 goto recovery_failed;
0400a6b0 4937 goto wait_on_recovery;
0ced63d1 4938 case -NFS4ERR_EXPIRED:
5d422301
TM		 4939 if (state != NULL) {
4940 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4941 goto recovery_failed;
5d422301 4942 }
1da177e4 4943 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4944 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4945 nfs4_schedule_lease_recovery(clp);
4946 goto wait_on_recovery;
519ae255
CL		 4947 case -NFS4ERR_MOVED:
4948 if (nfs4_schedule_migration_recovery(server) < 0)
4949 goto recovery_failed;
4950 goto wait_on_recovery;
8ef2f8d4
CL		 4951 case -NFS4ERR_LEASE_MOVED:
4952 nfs4_schedule_lease_moved_recovery(clp);
4953 goto wait_on_recovery;
4745e315
AA		 4954#if defined(CONFIG_NFS_V4_1)
4955 case -NFS4ERR_BADSESSION:
4956 case -NFS4ERR_BADSLOT:
4957 case -NFS4ERR_BAD_HIGH_SLOT:
4958 case -NFS4ERR_DEADSESSION:
4959 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4960 case -NFS4ERR_SEQ_FALSE_RETRY:
4961 case -NFS4ERR_SEQ_MISORDERED:
4962 dprintk("%s ERROR %d, Reset session\n", __func__,
4963 task->tk_status);
9f594791 4964 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4965 goto wait_on_recovery;
4745e315 4966#endif /* CONFIG_NFS_V4_1 */
1da177e4 4967 case -NFS4ERR_DELAY:
aa5190d0 4968 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4969 rpc_delay(task, nfs4_update_delay(timeout));
4970 goto restart_call;
006ea73e 4971 case -NFS4ERR_GRACE:
1da177e4 4972 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4973 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4974 case -NFS4ERR_OLD_STATEID:
f1478c13 4975 goto restart_call;
1da177e4
LT		 4976 }
4977 task->tk_status = nfs4_map_errors(task->tk_status);
4978 return 0;
9f51a78e 4979recovery_failed:
5d422301
TM		 4980 task->tk_status = -EIO;
4981 return 0;
0400a6b0 4982wait_on_recovery:
a2c0b9e2 4983 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4984 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4985 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4986 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4987 goto recovery_failed;
f1478c13 4988restart_call:
a2c0b9e2
TM		 4989 task->tk_status = 0;
4990 return -EAGAIN;
1da177e4
LT		 4991}
4992
f092075d
CL		 4993static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4994 nfs4_verifier *bootverf)
cd93710e
CL		 4995{
4996 __be32 verf[2];
4997
2c820d9a
CL		 4998 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4999 /* An impossible timestamp guarantees this value
5000 * will never match a generated boot time. */
5001 verf[0] = 0;
17f26b12 5002 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5003 } else {
f092075d 5004 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5005 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5006 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5007 }
cd93710e
CL		 5008 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5009}
5010
a3192688
JL		 5011static int
5012nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5013{
a3192688
JL		 5014 int result;
5015 size_t len;
5016 char *str;
5017 bool retried = false;
e984a55a 5018
ceb3a16c 5019 if (clp->cl_owner_id != NULL)
a3192688
JL		 5020 return 0;
5021retry:
5022 rcu_read_lock();
5023 len = 10 + strlen(clp->cl_ipaddr) + 1 +
5024 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5025 1 +
5026 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5027 1;
5028 rcu_read_unlock();
5029
5030 if (len > NFS4_OPAQUE_LIMIT + 1)
5031 return -EINVAL;
5032
5033 /*
5034 * Since this string is allocated at mount time, and held until the
5035 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5036 * about a memory-reclaim deadlock.
5037 */
5038 str = kmalloc(len, GFP_KERNEL);
5039 if (!str)
5040 return -ENOMEM;
ceb3a16c 5041
e984a55a 5042 rcu_read_lock();
a3192688
JL		 5043 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5044 clp->cl_ipaddr,
5045 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5046 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5047 rcu_read_unlock();
a3192688
JL		 5048
5049 /* Did something change? */
5050 if (result >= len) {
5051 kfree(str);
5052 if (retried)
5053 return -EINVAL;
5054 retried = true;
5055 goto retry;
5056 }
5057 clp->cl_owner_id = str;
5058 return 0;
e984a55a
CL		 5059}
5060
873e3851
JL		 5061static int
5062nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5063{
5064 int result;
5065 size_t len;
5066 char *str;
5067
5068 len = 10 + 10 + 1 + 10 + 1 +
5069 strlen(nfs4_client_id_uniquifier) + 1 +
5070 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5071
5072 if (len > NFS4_OPAQUE_LIMIT + 1)
5073 return -EINVAL;
5074
5075 /*
5076 * Since this string is allocated at mount time, and held until the
5077 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5078 * about a memory-reclaim deadlock.
5079 */
5080 str = kmalloc(len, GFP_KERNEL);
5081 if (!str)
5082 return -ENOMEM;
5083
5084 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5085 clp->rpc_ops->version, clp->cl_minorversion,
5086 nfs4_client_id_uniquifier,
5087 clp->cl_rpcclient->cl_nodename);
5088 if (result >= len) {
5089 kfree(str);
5090 return -EINVAL;
5091 }
5092 clp->cl_owner_id = str;
5093 return 0;
5094}
5095
5096static int
5097nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5098{
873e3851
JL		 5099 int result;
5100 size_t len;
5101 char *str;
ceb3a16c
TM		 5102
5103 if (clp->cl_owner_id != NULL)
873e3851 5104 return 0;
6f2ea7f2
CL		 5105
5106 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5107 return nfs4_init_uniquifier_client_string(clp);
5108
5109 len = 10 + 10 + 1 + 10 + 1 +
5110 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5111
5112 if (len > NFS4_OPAQUE_LIMIT + 1)
5113 return -EINVAL;
5114
5115 /*
5116 * Since this string is allocated at mount time, and held until the
5117 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5118 * about a memory-reclaim deadlock.
5119 */
5120 str = kmalloc(len, GFP_KERNEL);
5121 if (!str)
5122 return -ENOMEM;
5123
5124 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5125 clp->rpc_ops->version, clp->cl_minorversion,
5126 clp->cl_rpcclient->cl_nodename);
5127 if (result >= len) {
5128 kfree(str);
5129 return -EINVAL;
5130 }
5131 clp->cl_owner_id = str;
5132 return 0;
e984a55a
CL		 5133}
5134
706cb8db
CL		 5135/*
5136 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5137 * services. Advertise one based on the address family of the
5138 * clientaddr.
5139 */
5140static unsigned int
5141nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5142{
5143 if (strchr(clp->cl_ipaddr, ':') != NULL)
5144 return scnprintf(buf, len, "tcp6");
5145 else
5146 return scnprintf(buf, len, "tcp");
5147}
5148
f11b2a1c
JL		 5149static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5150{
5151 struct nfs4_setclientid *sc = calldata;
5152
5153 if (task->tk_status == 0)
5154 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5155}
5156
5157static const struct rpc_call_ops nfs4_setclientid_ops = {
5158 .rpc_call_done = nfs4_setclientid_done,
5159};
5160
6bbb4ae8
CL		 5161/**
5162 * nfs4_proc_setclientid - Negotiate client ID
5163 * @clp: state data structure
5164 * @program: RPC program for NFSv4 callback service
5165 * @port: IP port number for NFS4 callback service
5166 * @cred: RPC credential to use for this call
5167 * @res: where to place the result
5168 *
5169 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5170 */
bb8b27e5
TM		 5171int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5172 unsigned short port, struct rpc_cred *cred,
5173 struct nfs4_setclientid_res *res)
1da177e4
LT		 5174{
5175 nfs4_verifier sc_verifier;
5176 struct nfs4_setclientid setclientid = {
5177 .sc_verifier = &sc_verifier,
5178 .sc_prog = program,
3a6bb738 5179 .sc_clnt = clp,
1da177e4
LT		 5180 };
5181 struct rpc_message msg = {
5182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5183 .rpc_argp = &setclientid,
bb8b27e5 5184 .rpc_resp = res,
286d7d6a 5185 .rpc_cred = cred,
1da177e4 5186 };
f11b2a1c
JL		 5187 struct rpc_task *task;
5188 struct rpc_task_setup task_setup_data = {
5189 .rpc_client = clp->cl_rpcclient,
5190 .rpc_message = &msg,
5191 .callback_ops = &nfs4_setclientid_ops,
5192 .callback_data = &setclientid,
5193 .flags = RPC_TASK_TIMEOUT,
5194 };
6bbb4ae8 5195 int status;
1da177e4 5196
de734831 5197 /* nfs_client_id4 */
f092075d 5198 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5199
5200 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5201 status = nfs4_init_uniform_client_string(clp);
5202 else
a3192688 5203 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5204
5205 if (status)
5206 goto out;
3a6bb738 5207
de734831 5208 /* cb_client4 */
706cb8db
CL		 5209 setclientid.sc_netid_len =
5210 nfs4_init_callback_netid(clp,
5211 setclientid.sc_netid,
5212 sizeof(setclientid.sc_netid));
de734831 5213 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5214 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5215 clp->cl_ipaddr, port >> 8, port & 255);
5216
3a6bb738 5217 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5218 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5219 clp->cl_owner_id);
f11b2a1c
JL		 5220 task = rpc_run_task(&task_setup_data);
5221 if (IS_ERR(task)) {
5222 status = PTR_ERR(task);
5223 goto out;
5224 }
5225 status = task->tk_status;
5226 if (setclientid.sc_cred) {
5227 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5228 put_rpccred(setclientid.sc_cred);
5229 }
5230 rpc_put_task(task);
5231out:
c6d01c6f 5232 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5233 dprintk("NFS reply setclientid: %d\n", status);
5234 return status;
1da177e4
LT		 5235}
5236
6bbb4ae8
CL		 5237/**
5238 * nfs4_proc_setclientid_confirm - Confirm client ID
5239 * @clp: state data structure
5240 * @res: result of a previous SETCLIENTID
5241 * @cred: RPC credential to use for this call
5242 *
5243 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5244 */
fd954ae1 5245int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5246 struct nfs4_setclientid_res *arg,
5247 struct rpc_cred *cred)
1da177e4 5248{
1da177e4
LT		 5249 struct rpc_message msg = {
5250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5251 .rpc_argp = arg,
286d7d6a 5252 .rpc_cred = cred,
1da177e4 5253 };
1da177e4
LT		 5254 int status;
5255
6bbb4ae8
CL		 5256 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5257 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5258 clp->cl_clientid);
1bd714f2 5259 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5260 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5261 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5262 return status;
5263}
5264
fe650407
TM		 5265struct nfs4_delegreturndata {
5266 struct nfs4_delegreturnargs args;
fa178f29 5267 struct nfs4_delegreturnres res;
fe650407
TM		 5268 struct nfs_fh fh;
5269 nfs4_stateid stateid;
26e976a8 5270 unsigned long timestamp;
fa178f29 5271 struct nfs_fattr fattr;
fe650407 5272 int rpc_status;
039b756a
PT		 5273 struct inode *inode;
5274 bool roc;
5275 u32 roc_barrier;
fe650407
TM		 5276};
5277
fe650407
TM		 5278static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5279{
5280 struct nfs4_delegreturndata *data = calldata;
938e1010 5281
14516c3a
TM		 5282 if (!nfs4_sequence_done(task, &data->res.seq_res))
5283 return;
938e1010 5284
ca8acf8d 5285 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5286 switch (task->tk_status) {
79708861 5287 case 0:
fa178f29 5288 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5289 case -NFS4ERR_ADMIN_REVOKED:
5290 case -NFS4ERR_DELEG_REVOKED:
5291 case -NFS4ERR_BAD_STATEID:
5292 case -NFS4ERR_OLD_STATEID:
5293 case -NFS4ERR_STALE_STATEID:
5294 case -NFS4ERR_EXPIRED:
5295 task->tk_status = 0;
039b756a
PT		 5296 if (data->roc)
5297 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5298 break;
79708861 5299 default:
8478eaa1
N		 5300 if (nfs4_async_handle_error(task, data->res.server,
5301 NULL, NULL) == -EAGAIN) {
d00c5d43 5302 rpc_restart_call_prepare(task);
79708861
RL		 5303 return;
5304 }
5305 }
5306 data->rpc_status = task->tk_status;
fe650407
TM		 5307}
5308
5309static void nfs4_delegreturn_release(void *calldata)
5310{
039b756a 5311 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5312 struct inode *inode = data->inode;
039b756a 5313
ea7c38fe
TM		 5314 if (inode) {
5315 if (data->roc)
5316 pnfs_roc_release(inode);
5317 nfs_iput_and_deactive(inode);
5318 }
fe650407
TM		 5319 kfree(calldata);
5320}
5321
938e1010
AA		 5322static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5323{
5324 struct nfs4_delegreturndata *d_data;
5325
5326 d_data = (struct nfs4_delegreturndata *)data;
5327
4ff376fe
TM		 5328 if (d_data->roc)
5329 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5330
d9afbd1b
TM		 5331 nfs4_setup_sequence(d_data->res.server,
5332 &d_data->args.seq_args,
5333 &d_data->res.seq_res,
5334 task);
938e1010 5335}
938e1010 5336
c8d149f3 5337static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5338 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5339 .rpc_call_done = nfs4_delegreturn_done,
5340 .rpc_release = nfs4_delegreturn_release,
5341};
5342
e6f81075 5343static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5344{
5345 struct nfs4_delegreturndata *data;
fa178f29 5346 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5347 struct rpc_task *task;
5138fde0
TM		 5348 struct rpc_message msg = {
5349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5350 .rpc_cred = cred,
5351 };
c970aa85
TM		 5352 struct rpc_task_setup task_setup_data = {
5353 .rpc_client = server->client,
5138fde0 5354 .rpc_message = &msg,
c970aa85
TM		 5355 .callback_ops = &nfs4_delegreturn_ops,
5356 .flags = RPC_TASK_ASYNC,
5357 };
e6f81075 5358 int status = 0;
fe650407 5359
8535b2be 5360 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5361 if (data == NULL)
5362 return -ENOMEM;
a9c92d6b 5363 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5364 data->args.fhandle = &data->fh;
5365 data->args.stateid = &data->stateid;
9e907fec 5366 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5367 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5368 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5369 data->res.fattr = &data->fattr;
5370 data->res.server = server;
5138fde0 5371 nfs_fattr_init(data->res.fattr);
26e976a8 5372 data->timestamp = jiffies;
fe650407 5373 data->rpc_status = 0;
ea7c38fe
TM		 5374 data->inode = nfs_igrab_and_active(inode);
5375 if (data->inode)
5376 data->roc = nfs4_roc(inode);
fe650407 5377
c970aa85 5378 task_setup_data.callback_data = data;
1174dd1f
TM		 5379 msg.rpc_argp = &data->args;
5380 msg.rpc_resp = &data->res;
c970aa85 5381 task = rpc_run_task(&task_setup_data);
7a1218a2 5382 if (IS_ERR(task))
fe650407 5383 return PTR_ERR(task);
e6f81075
TM		 5384 if (!issync)
5385 goto out;
fe650407 5386 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5387 if (status != 0)
5388 goto out;
5389 status = data->rpc_status;
e144cbcc
TM		 5390 if (status == 0)
5391 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5392 else
5393 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5394out:
e6b3c4db 5395 rpc_put_task(task);
fe650407 5396 return status;
1da177e4
LT		 5397}
5398
e6f81075 5399int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5400{
5401 struct nfs_server *server = NFS_SERVER(inode);
5402 struct nfs4_exception exception = { };
5403 int err;
5404 do {
e6f81075 5405 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5406 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5407 switch (err) {
5408 case -NFS4ERR_STALE_STATEID:
5409 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5410 case 0:
5411 return 0;
5412 }
5413 err = nfs4_handle_exception(server, err, &exception);
5414 } while (exception.retry);
5415 return err;
5416}
5417
5418#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5419#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5420
5421/*
5422 * sleep, with exponential backoff, and retry the LOCK operation.
5423 */
5424static unsigned long
5425nfs4_set_lock_task_retry(unsigned long timeout)
5426{
416ad3c9 5427 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5428 timeout <<= 1;
5429 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5430 return NFS4_LOCK_MAXTIMEOUT;
5431 return timeout;
5432}
5433
1da177e4
LT		 5434static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5435{
5436 struct inode *inode = state->inode;
5437 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5438 struct nfs_client *clp = server->nfs_client;
911d1aaf 5439 struct nfs_lockt_args arg = {
1da177e4 5440 .fh = NFS_FH(inode),
911d1aaf 5441 .fl = request,
1da177e4 5442 };
911d1aaf
TM		 5443 struct nfs_lockt_res res = {
5444 .denied = request,
1da177e4
LT		 5445 };
5446 struct rpc_message msg = {
5447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5448 .rpc_argp = &arg,
5449 .rpc_resp = &res,
5450 .rpc_cred = state->owner->so_cred,
5451 };
1da177e4
LT		 5452 struct nfs4_lock_state *lsp;
5453 int status;
5454
911d1aaf 5455 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5456 status = nfs4_set_lock_state(state, request);
5457 if (status != 0)
5458 goto out;
5459 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5460 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5461 arg.lock_owner.s_dev = server->s_dev;
7c513058 5462 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5463 switch (status) {
5464 case 0:
5465 request->fl_type = F_UNLCK;
5466 break;
5467 case -NFS4ERR_DENIED:
5468 status = 0;
1da177e4 5469 }
70cc6487 5470 request->fl_ops->fl_release_private(request);
a6f951dd 5471 request->fl_ops = NULL;
8d0a8a9d 5472out:
1da177e4
LT		 5473 return status;
5474}
5475
5476static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5477{
5478 struct nfs4_exception exception = { };
5479 int err;
5480
5481 do {
d1b748a5
TM		 5482 err = _nfs4_proc_getlk(state, cmd, request);
5483 trace_nfs4_get_lock(request, state, cmd, err);
5484 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5485 &exception);
5486 } while (exception.retry);
5487 return err;
5488}
5489
83bfff23 5490static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5491{
5492 int res = 0;
5493 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5494 case FL_POSIX:
83bfff23 5495 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5496 break;
5497 case FL_FLOCK:
83bfff23 5498 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5499 break;
5500 default:
5501 BUG();
5502 }
1da177e4
LT		 5503 return res;
5504}
5505
faf5f49c 5506struct nfs4_unlockdata {
911d1aaf
TM		 5507 struct nfs_locku_args arg;
5508 struct nfs_locku_res res;
faf5f49c
TM		 5509 struct nfs4_lock_state *lsp;
5510 struct nfs_open_context *ctx;
911d1aaf
TM		 5511 struct file_lock fl;
5512 const struct nfs_server *server;
26e976a8 5513 unsigned long timestamp;
faf5f49c
TM		 5514};
5515
911d1aaf
TM		 5516static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5517 struct nfs_open_context *ctx,
5518 struct nfs4_lock_state *lsp,
5519 struct nfs_seqid *seqid)
5520{
5521 struct nfs4_unlockdata *p;
5522 struct inode *inode = lsp->ls_state->inode;
5523
8535b2be 5524 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5525 if (p == NULL)
5526 return NULL;
5527 p->arg.fh = NFS_FH(inode);
5528 p->arg.fl = &p->fl;
5529 p->arg.seqid = seqid;
c1d51931 5530 p->res.seqid = seqid;
911d1aaf
TM		 5531 p->lsp = lsp;
5532 atomic_inc(&lsp->ls_count);
5533 /* Ensure we don't close file until we're done freeing locks! */
5534 p->ctx = get_nfs_open_context(ctx);
5535 memcpy(&p->fl, fl, sizeof(p->fl));
5536 p->server = NFS_SERVER(inode);
5537 return p;
5538}
5539
06f814a3 5540static void nfs4_locku_release_calldata(void *data)
faf5f49c 5541{
963d8fe5 5542 struct nfs4_unlockdata *calldata = data;
911d1aaf 5543 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5544 nfs4_put_lock_state(calldata->lsp);
5545 put_nfs_open_context(calldata->ctx);
5546 kfree(calldata);
faf5f49c
TM		 5547}
5548
963d8fe5 5549static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5550{
963d8fe5 5551 struct nfs4_unlockdata *calldata = data;
faf5f49c 5552
14516c3a
TM		 5553 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5554 return;
faf5f49c
TM		 5555 switch (task->tk_status) {
5556 case 0:
26e976a8 5557 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5558 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5559 if (nfs4_update_lock_stateid(calldata->lsp,
5560 &calldata->res.stateid))
5561 break;
9e33bed5
TM		 5562 case -NFS4ERR_BAD_STATEID:
5563 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5564 case -NFS4ERR_STALE_STATEID:
5565 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5566 if (!nfs4_stateid_match(&calldata->arg.stateid,
5567 &calldata->lsp->ls_stateid))
5568 rpc_restart_call_prepare(task);
faf5f49c
TM		 5569 break;
5570 default:
8478eaa1
N		 5571 if (nfs4_async_handle_error(task, calldata->server,
5572 NULL, NULL) == -EAGAIN)
d00c5d43 5573 rpc_restart_call_prepare(task);
faf5f49c 5574 }
2b1bc308 5575 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5576}
5577
4ce70ada 5578static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5579{
4ce70ada 5580 struct nfs4_unlockdata *calldata = data;
faf5f49c 5581
911d1aaf 5582 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5583 goto out_wait;
425c1d4e 5584 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5585 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5586 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5587 goto out_no_action;
faf5f49c 5588 }
26e976a8 5589 calldata->timestamp = jiffies;
035168ab 5590 if (nfs4_setup_sequence(calldata->server,
a893693c 5591 &calldata->arg.seq_args,
2240a9e2
TM		 5592 &calldata->res.seq_res,
5593 task) != 0)
5594 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5595 return;
5596out_no_action:
5597 task->tk_action = NULL;
5598out_wait:
5599 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5600}
5601
963d8fe5 5602static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5603 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5604 .rpc_call_done = nfs4_locku_done,
06f814a3 5605 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5606};
5607
a5d16a4d
TM		 5608static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5609 struct nfs_open_context *ctx,
5610 struct nfs4_lock_state *lsp,
5611 struct nfs_seqid *seqid)
5612{
5613 struct nfs4_unlockdata *data;
5138fde0
TM		 5614 struct rpc_message msg = {
5615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5616 .rpc_cred = ctx->cred,
5617 };
c970aa85
TM		 5618 struct rpc_task_setup task_setup_data = {
5619 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5620 .rpc_message = &msg,
c970aa85 5621 .callback_ops = &nfs4_locku_ops,
101070ca 5622 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5623 .flags = RPC_TASK_ASYNC,
5624 };
a5d16a4d 5625
fa940720
WAA		 5626 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5627 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5628
137d6aca
FF		 5629 /* Ensure this is an unlock - when canceling a lock, the
5630 * canceled lock is passed in, and it won't be an unlock.
5631 */
5632 fl->fl_type = F_UNLCK;
5633
a5d16a4d
TM		 5634 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5635 if (data == NULL) {
5636 nfs_free_seqid(seqid);
5637 return ERR_PTR(-ENOMEM);
5638 }
5639
a9c92d6b 5640 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5641 msg.rpc_argp = &data->arg;
5642 msg.rpc_resp = &data->res;
c970aa85
TM		 5643 task_setup_data.callback_data = data;
5644 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5645}
5646
faf5f49c
TM		 5647static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5648{
65b62a29
TM		 5649 struct inode *inode = state->inode;
5650 struct nfs4_state_owner *sp = state->owner;
5651 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5652 struct nfs_seqid *seqid;
1da177e4 5653 struct nfs4_lock_state *lsp;
06f814a3 5654 struct rpc_task *task;
b4019c0e 5655 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5656 int status = 0;
536ff0f8 5657 unsigned char fl_flags = request->fl_flags;
faf5f49c 5658
8d0a8a9d 5659 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5660 /* Unlock _before_ we do the RPC call */
5661 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5662 /* Exclude nfs_delegation_claim_locks() */
5663 mutex_lock(&sp->so_delegreturn_mutex);
5664 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5665 down_read(&nfsi->rwsem);
83bfff23 5666 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5667 up_read(&nfsi->rwsem);
65b62a29 5668 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5669 goto out;
19e03c57
TM		 5670 }
5671 up_read(&nfsi->rwsem);
65b62a29 5672 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5673 if (status != 0)
9b073574
TM		 5674 goto out;
5675 /* Is this a delegated lock? */
8d0a8a9d 5676 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5677 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5678 goto out;
b4019c0e
TM		 5679 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5680 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5681 status = -ENOMEM;
badc76dd 5682 if (IS_ERR(seqid))
9b073574 5683 goto out;
cd3758e3 5684 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5685 status = PTR_ERR(task);
5686 if (IS_ERR(task))
9b073574 5687 goto out;
a5d16a4d 5688 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5689 rpc_put_task(task);
9b073574 5690out:
536ff0f8 5691 request->fl_flags = fl_flags;
d1b748a5 5692 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5693 return status;
5694}
5695
a5d16a4d
TM		 5696struct nfs4_lockdata {
5697 struct nfs_lock_args arg;
5698 struct nfs_lock_res res;
5699 struct nfs4_lock_state *lsp;
5700 struct nfs_open_context *ctx;
5701 struct file_lock fl;
26e976a8 5702 unsigned long timestamp;
a5d16a4d
TM		 5703 int rpc_status;
5704 int cancelled;
66179efe 5705 struct nfs_server *server;
a5d16a4d
TM		 5706};
5707
5708static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5709 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5710 gfp_t gfp_mask)
1da177e4 5711{
a5d16a4d
TM		 5712 struct nfs4_lockdata *p;
5713 struct inode *inode = lsp->ls_state->inode;
1da177e4 5714 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5715 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5716
8535b2be 5717 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5718 if (p == NULL)
5719 return NULL;
5720
5721 p->arg.fh = NFS_FH(inode);
5722 p->arg.fl = &p->fl;
8535b2be 5723 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5724 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5725 goto out_free;
b4019c0e
TM		 5726 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5727 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5728 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5729 goto out_free_seqid;
7539bbab 5730 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5731 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5732 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5733 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5734 p->lsp = lsp;
66179efe 5735 p->server = server;
a5d16a4d
TM		 5736 atomic_inc(&lsp->ls_count);
5737 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5738 get_file(fl->fl_file);
a5d16a4d
TM		 5739 memcpy(&p->fl, fl, sizeof(p->fl));
5740 return p;
2f74c0a0
TM		 5741out_free_seqid:
5742 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5743out_free:
5744 kfree(p);
5745 return NULL;
5746}
5747
5748static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5749{
5750 struct nfs4_lockdata *data = calldata;
5751 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5752
3110ff80 5753 dprintk("%s: begin!\n", __func__);
2f74c0a0 5754 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5755 goto out_wait;
a5d16a4d 5756 /* Do we need to do an open_to_lock_owner? */
6b447539 5757 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5758 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5759 goto out_release_lock_seqid;
8fe72bac 5760 }
425c1d4e
TM		 5761 nfs4_stateid_copy(&data->arg.open_stateid,
5762 &state->open_stateid);
a5d16a4d 5763 data->arg.new_lock_owner = 1;
c1d51931 5764 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5765 } else {
2f74c0a0 5766 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5767 nfs4_stateid_copy(&data->arg.lock_stateid,
5768 &data->lsp->ls_stateid);
5769 }
5d422301
TM		 5770 if (!nfs4_valid_open_stateid(state)) {
5771 data->rpc_status = -EBADF;
5772 task->tk_action = NULL;
5773 goto out_release_open_seqid;
5774 }
26e976a8 5775 data->timestamp = jiffies;
035168ab
TM		 5776 if (nfs4_setup_sequence(data->server,
5777 &data->arg.seq_args,
2240a9e2 5778 &data->res.seq_res,
d9afbd1b 5779 task) == 0)
66179efe 5780 return;
5d422301 5781out_release_open_seqid:
2240a9e2
TM		 5782 nfs_release_seqid(data->arg.open_seqid);
5783out_release_lock_seqid:
5784 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5785out_wait:
5786 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5787 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5788}
5789
a5d16a4d
TM		 5790static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5791{
5792 struct nfs4_lockdata *data = calldata;
39071e6f 5793 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5794
3110ff80 5795 dprintk("%s: begin!\n", __func__);
a5d16a4d 5796
14516c3a
TM		 5797 if (!nfs4_sequence_done(task, &data->res.seq_res))
5798 return;
66179efe 5799
a5d16a4d 5800 data->rpc_status = task->tk_status;
425c1d4e
TM		 5801 switch (task->tk_status) {
5802 case 0:
2b0143b5 5803 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5804 data->timestamp);
c69899a1
TM		 5805 if (data->arg.new_lock) {
5806 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5807 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5808 rpc_restart_call_prepare(task);
5809 break;
5810 }
5811 }
39071e6f
TM		 5812 if (data->arg.new_lock_owner != 0) {
5813 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5814 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5815 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5816 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5817 rpc_restart_call_prepare(task);
425c1d4e
TM		 5818 break;
5819 case -NFS4ERR_BAD_STATEID:
5820 case -NFS4ERR_OLD_STATEID:
5821 case -NFS4ERR_STALE_STATEID:
5822 case -NFS4ERR_EXPIRED:
5823 if (data->arg.new_lock_owner != 0) {
5824 if (!nfs4_stateid_match(&data->arg.open_stateid,
5825 &lsp->ls_state->open_stateid))
5826 rpc_restart_call_prepare(task);
5827 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5828 &lsp->ls_stateid))
5829 rpc_restart_call_prepare(task);
a5d16a4d 5830 }
3110ff80 5831 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5832}
5833
5834static void nfs4_lock_release(void *calldata)
5835{
5836 struct nfs4_lockdata *data = calldata;
5837
3110ff80 5838 dprintk("%s: begin!\n", __func__);
2f74c0a0 5839 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5840 if (data->cancelled != 0) {
5841 struct rpc_task *task;
5842 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5843 data->arg.lock_seqid);
5844 if (!IS_ERR(task))
bf294b41 5845 rpc_put_task_async(task);
3110ff80 5846 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5847 } else
5848 nfs_free_seqid(data->arg.lock_seqid);
5849 nfs4_put_lock_state(data->lsp);
5850 put_nfs_open_context(data->ctx);
feaff8e5 5851 fput(data->fl.fl_file);
a5d16a4d 5852 kfree(data);
3110ff80 5853 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5854}
5855
5856static const struct rpc_call_ops nfs4_lock_ops = {
5857 .rpc_call_prepare = nfs4_lock_prepare,
5858 .rpc_call_done = nfs4_lock_done,
5859 .rpc_release = nfs4_lock_release,
5860};
5861
2bee72a6
TM		 5862static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5863{
2bee72a6
TM		 5864 switch (error) {
5865 case -NFS4ERR_ADMIN_REVOKED:
5866 case -NFS4ERR_BAD_STATEID:
ecac799a 5867 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5868 if (new_lock_owner != 0 ||
795a88c9 5869 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5870 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5871 break;
5872 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5873 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5874 case -NFS4ERR_EXPIRED:
5875 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5876 };
5877}
5878
afe6c27c 5879static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5880{
5881 struct nfs4_lockdata *data;
5882 struct rpc_task *task;
5138fde0
TM		 5883 struct rpc_message msg = {
5884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5885 .rpc_cred = state->owner->so_cred,
5886 };
c970aa85
TM		 5887 struct rpc_task_setup task_setup_data = {
5888 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5889 .rpc_message = &msg,
c970aa85 5890 .callback_ops = &nfs4_lock_ops,
101070ca 5891 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5892 .flags = RPC_TASK_ASYNC,
5893 };
a5d16a4d
TM		 5894 int ret;
5895
3110ff80 5896 dprintk("%s: begin!\n", __func__);
cd3758e3 5897 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5898 fl->fl_u.nfs4_fl.owner,
5899 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5900 if (data == NULL)
5901 return -ENOMEM;
5902 if (IS_SETLKW(cmd))
5903 data->arg.block = 1;
a9c92d6b 5904 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5905 msg.rpc_argp = &data->arg;
5906 msg.rpc_resp = &data->res;
c970aa85 5907 task_setup_data.callback_data = data;
8fe72bac
TM		 5908 if (recovery_type > NFS_LOCK_NEW) {
5909 if (recovery_type == NFS_LOCK_RECLAIM)
5910 data->arg.reclaim = NFS_LOCK_RECLAIM;
5911 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5912 } else
5913 data->arg.new_lock = 1;
c970aa85 5914 task = rpc_run_task(&task_setup_data);
7a1218a2 5915 if (IS_ERR(task))
a5d16a4d 5916 return PTR_ERR(task);
a5d16a4d
TM		 5917 ret = nfs4_wait_for_completion_rpc_task(task);
5918 if (ret == 0) {
5919 ret = data->rpc_status;
2bee72a6
TM		 5920 if (ret)
5921 nfs4_handle_setlk_error(data->server, data->lsp,
5922 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5923 } else
5924 data->cancelled = 1;
e6b3c4db 5925 rpc_put_task(task);
3110ff80 5926 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5927 return ret;
1da177e4
LT		 5928}
5929
5930static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5931{
202b50dc 5932 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5933 struct nfs4_exception exception = {
5934 .inode = state->inode,
5935 };
202b50dc
TM		 5936 int err;
5937
5938 do {
42a2d13e
TM		 5939 /* Cache the lock if possible... */
5940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5941 return 0;
afe6c27c 5942 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5943 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5944 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5945 break;
5946 nfs4_handle_exception(server, err, &exception);
5947 } while (exception.retry);
5948 return err;
1da177e4
LT		 5949}
5950
5951static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5952{
202b50dc 5953 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5954 struct nfs4_exception exception = {
5955 .inode = state->inode,
5956 };
202b50dc
TM		 5957 int err;
5958
6bfc93ef
TM		 5959 err = nfs4_set_lock_state(state, request);
5960 if (err != 0)
5961 return err;
f6de7a39 5962 if (!recover_lost_locks) {
ef1820f9
N		 5963 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5964 return 0;
5965 }
202b50dc 5966 do {
42a2d13e
TM		 5967 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5968 return 0;
afe6c27c 5969 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5970 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5971 switch (err) {
5972 default:
5973 goto out;
5974 case -NFS4ERR_GRACE:
5975 case -NFS4ERR_DELAY:
5976 nfs4_handle_exception(server, err, &exception);
5977 err = 0;
5978 }
202b50dc 5979 } while (exception.retry);
a9ed2e25 5980out:
202b50dc 5981 return err;
1da177e4
LT		 5982}
5983
f062eb6c 5984#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5985/**
5986 * nfs41_check_expired_locks - possibly free a lock stateid
5987 *
5988 * @state: NFSv4 state for an inode
5989 *
5990 * Returns NFS_OK if recovery for this stateid is now finished.
5991 * Otherwise a negative NFS4ERR value is returned.
5992 */
b01dd1d8 5993static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5994{
eb64cf96 5995 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5996 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5997 struct nfs_server *server = NFS_SERVER(state->inode);
5998
b01dd1d8 5999 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6000 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6001 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6002
6003 status = nfs41_test_stateid(server,
6004 &lsp->ls_stateid,
6005 cred);
08cb47fa 6006 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6007 if (status != NFS_OK) {
3e60ffdd
CL		 6008 /* Free the stateid unless the server
6009 * informs us the stateid is unrecognized. */
89af2739
CL		 6010 if (status != -NFS4ERR_BAD_STATEID)
6011 nfs41_free_stateid(server,
ab7cb0df
TM		 6012 &lsp->ls_stateid,
6013 cred);
795a88c9 6014 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6015 ret = status;
6016 }
6017 }
6018 };
6019
6020 return ret;
6021}
6022
6023static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6024{
6025 int status = NFS_OK;
6026
6027 if (test_bit(LK_STATE_IN_USE, &state->flags))
6028 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6029 if (status != NFS_OK)
6030 status = nfs4_lock_expired(state, request);
6031 return status;
f062eb6c
BS		 6032}
6033#endif
6034
1da177e4
LT		 6035static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6036{
19e03c57 6037 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6038 unsigned char fl_flags = request->fl_flags;
8e469ebd 6039 int status = -ENOLCK;
1da177e4 6040
8e469ebd
TM		 6041 if ((fl_flags & FL_POSIX) &&
6042 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6043 goto out;
6bfc93ef 6044 /* Is this a delegated open? */
6bfc93ef
TM		 6045 status = nfs4_set_lock_state(state, request);
6046 if (status != 0)
6047 goto out;
01c3b861 6048 request->fl_flags |= FL_ACCESS;
83bfff23 6049 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6050 if (status < 0)
6051 goto out;
19e03c57 6052 down_read(&nfsi->rwsem);
01c3b861 6053 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6054 /* Yes: cache locks! */
01c3b861 6055 /* ...but avoid races with delegation recall... */
19e03c57 6056 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6057 status = do_vfs_lock(state->inode, request);
c69899a1 6058 up_read(&nfsi->rwsem);
9a99af49 6059 goto out;
9a99af49 6060 }
19e03c57 6061 up_read(&nfsi->rwsem);
c69899a1 6062 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6063out:
6064 request->fl_flags = fl_flags;
1da177e4
LT		 6065 return status;
6066}
6067
6068static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6069{
a1d0b5ee
TM		 6070 struct nfs4_exception exception = {
6071 .state = state,
05ffe24f 6072 .inode = state->inode,
a1d0b5ee 6073 };
1da177e4
LT		 6074 int err;
6075
6076 do {
965b5d67 6077 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6078 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6079 if (err == -NFS4ERR_DENIED)
6080 err = -EAGAIN;
1da177e4 6081 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6082 err, &exception);
1da177e4
LT		 6083 } while (exception.retry);
6084 return err;
6085}
6086
6087static int
6088nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6089{
6090 struct nfs_open_context *ctx;
6091 struct nfs4_state *state;
6092 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6093 int status;
6094
6095 /* verify open state */
cd3758e3 6096 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6097 state = ctx->state;
6098
6099 if (request->fl_start < 0 || request->fl_end < 0)
6100 return -EINVAL;
6101
d953126a
TM		 6102 if (IS_GETLK(cmd)) {
6103 if (state != NULL)
6104 return nfs4_proc_getlk(state, F_GETLK, request);
6105 return 0;
6106 }
1da177e4
LT		 6107
6108 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6109 return -EINVAL;
6110
d953126a
TM		 6111 if (request->fl_type == F_UNLCK) {
6112 if (state != NULL)
6113 return nfs4_proc_unlck(state, cmd, request);
6114 return 0;
6115 }
1da177e4 6116
d953126a
TM		 6117 if (state == NULL)
6118 return -ENOLCK;
55725513
TM		 6119 /*
6120 * Don't rely on the VFS having checked the file open mode,
6121 * since it won't do this for flock() locks.
6122 */
f44106e2 6123 switch (request->fl_type) {
55725513
TM		 6124 case F_RDLCK:
6125 if (!(filp->f_mode & FMODE_READ))
6126 return -EBADF;
6127 break;
6128 case F_WRLCK:
6129 if (!(filp->f_mode & FMODE_WRITE))
6130 return -EBADF;
6131 }
6132
1da177e4
LT		 6133 do {
6134 status = nfs4_proc_setlk(state, cmd, request);
6135 if ((status != -EAGAIN) || IS_SETLK(cmd))
6136 break;
6137 timeout = nfs4_set_lock_task_retry(timeout);
6138 status = -ERESTARTSYS;
6139 if (signalled())
6140 break;
6141 } while(status < 0);
1da177e4
LT		 6142 return status;
6143}
6144
db4f2e63 6145int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6146{
6147 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6148 int err;
6149
6150 err = nfs4_set_lock_state(state, fl);
6151 if (err != 0)
db4f2e63 6152 return err;
4a706fa0 6153 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6154 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6155}
6b3b5496 6156
cf470c3e
TM		 6157struct nfs_release_lockowner_data {
6158 struct nfs4_lock_state *lsp;
5ae67c4f 6159 struct nfs_server *server;
cf470c3e 6160 struct nfs_release_lockowner_args args;
b7e63a10 6161 struct nfs_release_lockowner_res res;
60ea6812 6162 unsigned long timestamp;
cf470c3e
TM		 6163};
6164
fbd4bfd1
CL		 6165static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6166{
6167 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6168 struct nfs_server *server = data->server;
cb04ad2a
PT		 6169 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6170 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6171 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6172 data->timestamp = jiffies;
fbd4bfd1
CL		 6173}
6174
6175static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6176{
6177 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6178 struct nfs_server *server = data->server;
6179
b7e63a10 6180 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6181
6182 switch (task->tk_status) {
6183 case 0:
6184 renew_lease(server, data->timestamp);
6185 break;
6186 case -NFS4ERR_STALE_CLIENTID:
6187 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6188 nfs4_schedule_lease_recovery(server->nfs_client);
6189 break;
60ea6812
CL		 6190 case -NFS4ERR_LEASE_MOVED:
6191 case -NFS4ERR_DELAY:
8478eaa1
N		 6192 if (nfs4_async_handle_error(task, server,
6193 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6194 rpc_restart_call_prepare(task);
6195 }
fbd4bfd1
CL		 6196}
6197
d3c7b7cc
TM		 6198static void nfs4_release_lockowner_release(void *calldata)
6199{
cf470c3e 6200 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6201 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6202 kfree(calldata);
6203}
6204
17280175 6205static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6206 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6207 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6208 .rpc_release = nfs4_release_lockowner_release,
6209};
6210
f1cdae87
JL		 6211static void
6212nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6213{
cf470c3e 6214 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6215 struct rpc_message msg = {
6216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6217 };
6218
6219 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6220 return;
fbd4bfd1 6221
cf470c3e
TM		 6222 data = kmalloc(sizeof(*data), GFP_NOFS);
6223 if (!data)
f1cdae87 6224 return;
cf470c3e 6225 data->lsp = lsp;
5ae67c4f 6226 data->server = server;
cf470c3e
TM		 6227 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6228 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6229 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6230
cf470c3e 6231 msg.rpc_argp = &data->args;
b7e63a10
TM		 6232 msg.rpc_resp = &data->res;
6233 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6234 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6235}
6236
aa1870af
BF		 6237#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6238
64c2ce8b
AK		 6239static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6240 const void *buf, size_t buflen,
6241 int flags, int type)
6b3b5496 6242{
64c2ce8b
AK		 6243 if (strcmp(key, "") != 0)
6244 return -EINVAL;
4b580ee3 6245
2b0143b5 6246 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6247}
6248
64c2ce8b
AK		 6249static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6250 void *buf, size_t buflen, int type)
6b3b5496 6251{
64c2ce8b
AK		 6252 if (strcmp(key, "") != 0)
6253 return -EINVAL;
aa1870af 6254
2b0143b5 6255 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6256}
6257
64c2ce8b
AK		 6258static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6259 size_t list_len, const char *name,
6260 size_t name_len, int type)
6b3b5496 6261{
64c2ce8b 6262 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6263
2b0143b5 6264 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6265 return 0;
64c2ce8b
AK		 6266
6267 if (list && len <= list_len)
6268 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6269 return len;
6b3b5496
BF		 6270}
6271
c9bccef6
DQ		 6272#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6273static inline int nfs4_server_supports_labels(struct nfs_server *server)
6274{
6275 return server->caps & NFS_CAP_SECURITY_LABEL;
6276}
6277
6278static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6279 const void *buf, size_t buflen,
6280 int flags, int type)
6281{
6282 if (security_ismaclabel(key))
6283 return nfs4_set_security_label(dentry, buf, buflen);
6284
6285 return -EOPNOTSUPP;
6286}
6287
6288static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6289 void *buf, size_t buflen, int type)
6290{
6291 if (security_ismaclabel(key))
2b0143b5 6292 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6293 return -EOPNOTSUPP;
6294}
6295
6296static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6297 size_t list_len, const char *name,
6298 size_t name_len, int type)
6299{
6300 size_t len = 0;
6301
2b0143b5
DH		 6302 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6303 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6304 if (list && len <= list_len)
2b0143b5 6305 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6306 }
6307 return len;
6308}
6309
6310static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6311 .prefix = XATTR_SECURITY_PREFIX,
6312 .list = nfs4_xattr_list_nfs4_label,
6313 .get = nfs4_xattr_get_nfs4_label,
6314 .set = nfs4_xattr_set_nfs4_label,
6315};
6316#endif
6317
6318
533eb461
AA		 6319/*
6320 * nfs_fhget will use either the mounted_on_fileid or the fileid
6321 */
69aaaae1
TM		 6322static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6323{
533eb461
AA		 6324 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6325 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6326 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6327 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6328 return;
6329
6330 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6331 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6332 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6333 fattr->nlink = 2;
6334}
6335
f05d147f
BS		 6336static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6337 const struct qstr *name,
6338 struct nfs4_fs_locations *fs_locations,
6339 struct page *page)
683b57b4
TM		 6340{
6341 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6342 u32 bitmask[3] = {
361e624f 6343 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6344 };
6345 struct nfs4_fs_locations_arg args = {
6346 .dir_fh = NFS_FH(dir),
c228fd3a 6347 .name = name,
683b57b4
TM		 6348 .page = page,
6349 .bitmask = bitmask,
6350 };
22958463
BH		 6351 struct nfs4_fs_locations_res res = {
6352 .fs_locations = fs_locations,
6353 };
683b57b4
TM		 6354 struct rpc_message msg = {
6355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6356 .rpc_argp = &args,
22958463 6357 .rpc_resp = &res,
683b57b4
TM		 6358 };
6359 int status;
6360
3110ff80 6361 dprintk("%s: start\n", __func__);
533eb461
AA		 6362
6363 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6364 * is not supported */
6365 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6366 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6367 else
6368 bitmask[0] |= FATTR4_WORD0_FILEID;
6369
c228fd3a 6370 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6371 fs_locations->server = server;
830b8e33 6372 fs_locations->nlocations = 0;
f05d147f 6373 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6374 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6375 return status;
6376}
6377
f05d147f
BS		 6378int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6379 const struct qstr *name,
6380 struct nfs4_fs_locations *fs_locations,
6381 struct page *page)
db0a9593
BS		 6382{
6383 struct nfs4_exception exception = { };
6384 int err;
6385 do {
078ea3df
TM		 6386 err = _nfs4_proc_fs_locations(client, dir, name,
6387 fs_locations, page);
6388 trace_nfs4_get_fs_locations(dir, name, err);
6389 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6390 &exception);
6391 } while (exception.retry);
6392 return err;
6393}
6394
b03d735b
CL		 6395/*
6396 * This operation also signals the server that this client is
6397 * performing migration recovery. The server can stop returning
6398 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6399 * appended to this compound to identify the client ID which is
6400 * performing recovery.
6401 */
6402static int _nfs40_proc_get_locations(struct inode *inode,
6403 struct nfs4_fs_locations *locations,
6404 struct page *page, struct rpc_cred *cred)
6405{
6406 struct nfs_server *server = NFS_SERVER(inode);
6407 struct rpc_clnt *clnt = server->client;
6408 u32 bitmask[2] = {
6409 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6410 };
6411 struct nfs4_fs_locations_arg args = {
6412 .clientid = server->nfs_client->cl_clientid,
6413 .fh = NFS_FH(inode),
6414 .page = page,
6415 .bitmask = bitmask,
6416 .migration = 1, /* skip LOOKUP */
6417 .renew = 1, /* append RENEW */
6418 };
6419 struct nfs4_fs_locations_res res = {
6420 .fs_locations = locations,
6421 .migration = 1,
6422 .renew = 1,
6423 };
6424 struct rpc_message msg = {
6425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6426 .rpc_argp = &args,
6427 .rpc_resp = &res,
6428 .rpc_cred = cred,
6429 };
6430 unsigned long now = jiffies;
6431 int status;
6432
6433 nfs_fattr_init(&locations->fattr);
6434 locations->server = server;
6435 locations->nlocations = 0;
6436
6437 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6438 nfs4_set_sequence_privileged(&args.seq_args);
6439 status = nfs4_call_sync_sequence(clnt, server, &msg,
6440 &args.seq_args, &res.seq_res);
6441 if (status)
6442 return status;
6443
6444 renew_lease(server, now);
6445 return 0;
6446}
6447
6448#ifdef CONFIG_NFS_V4_1
6449
6450/*
6451 * This operation also signals the server that this client is
6452 * performing migration recovery. The server can stop asserting
6453 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6454 * performing this operation is identified in the SEQUENCE
6455 * operation in this compound.
6456 *
6457 * When the client supports GETATTR(fs_locations_info), it can
6458 * be plumbed in here.
6459 */
6460static int _nfs41_proc_get_locations(struct inode *inode,
6461 struct nfs4_fs_locations *locations,
6462 struct page *page, struct rpc_cred *cred)
6463{
6464 struct nfs_server *server = NFS_SERVER(inode);
6465 struct rpc_clnt *clnt = server->client;
6466 u32 bitmask[2] = {
6467 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6468 };
6469 struct nfs4_fs_locations_arg args = {
6470 .fh = NFS_FH(inode),
6471 .page = page,
6472 .bitmask = bitmask,
6473 .migration = 1, /* skip LOOKUP */
6474 };
6475 struct nfs4_fs_locations_res res = {
6476 .fs_locations = locations,
6477 .migration = 1,
6478 };
6479 struct rpc_message msg = {
6480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6481 .rpc_argp = &args,
6482 .rpc_resp = &res,
6483 .rpc_cred = cred,
6484 };
6485 int status;
6486
6487 nfs_fattr_init(&locations->fattr);
6488 locations->server = server;
6489 locations->nlocations = 0;
6490
6491 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6492 nfs4_set_sequence_privileged(&args.seq_args);
6493 status = nfs4_call_sync_sequence(clnt, server, &msg,
6494 &args.seq_args, &res.seq_res);
6495 if (status == NFS4_OK &&
6496 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6497 status = -NFS4ERR_LEASE_MOVED;
6498 return status;
6499}
6500
6501#endif /* CONFIG_NFS_V4_1 */
6502
6503/**
6504 * nfs4_proc_get_locations - discover locations for a migrated FSID
6505 * @inode: inode on FSID that is migrating
6506 * @locations: result of query
6507 * @page: buffer
6508 * @cred: credential to use for this operation
6509 *
6510 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6511 * operation failed, or a negative errno if a local error occurred.
6512 *
6513 * On success, "locations" is filled in, but if the server has
6514 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6515 * asserted.
6516 *
6517 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6518 * from this client that require migration recovery.
6519 */
6520int nfs4_proc_get_locations(struct inode *inode,
6521 struct nfs4_fs_locations *locations,
6522 struct page *page, struct rpc_cred *cred)
6523{
6524 struct nfs_server *server = NFS_SERVER(inode);
6525 struct nfs_client *clp = server->nfs_client;
6526 const struct nfs4_mig_recovery_ops *ops =
6527 clp->cl_mvops->mig_recovery_ops;
6528 struct nfs4_exception exception = { };
6529 int status;
6530
6531 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6532 (unsigned long long)server->fsid.major,
6533 (unsigned long long)server->fsid.minor,
6534 clp->cl_hostname);
6535 nfs_display_fhandle(NFS_FH(inode), __func__);
6536
6537 do {
6538 status = ops->get_locations(inode, locations, page, cred);
6539 if (status != -NFS4ERR_DELAY)
6540 break;
6541 nfs4_handle_exception(server, status, &exception);
6542 } while (exception.retry);
6543 return status;
6544}
6545
44c99933
CL		 6546/*
6547 * This operation also signals the server that this client is
6548 * performing "lease moved" recovery. The server can stop
6549 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6550 * is appended to this compound to identify the client ID which is
6551 * performing recovery.
6552 */
6553static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6554{
6555 struct nfs_server *server = NFS_SERVER(inode);
6556 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6557 struct rpc_clnt *clnt = server->client;
6558 struct nfs4_fsid_present_arg args = {
6559 .fh = NFS_FH(inode),
6560 .clientid = clp->cl_clientid,
6561 .renew = 1, /* append RENEW */
6562 };
6563 struct nfs4_fsid_present_res res = {
6564 .renew = 1,
6565 };
6566 struct rpc_message msg = {
6567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6568 .rpc_argp = &args,
6569 .rpc_resp = &res,
6570 .rpc_cred = cred,
6571 };
6572 unsigned long now = jiffies;
6573 int status;
6574
6575 res.fh = nfs_alloc_fhandle();
6576 if (res.fh == NULL)
6577 return -ENOMEM;
6578
6579 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6580 nfs4_set_sequence_privileged(&args.seq_args);
6581 status = nfs4_call_sync_sequence(clnt, server, &msg,
6582 &args.seq_args, &res.seq_res);
6583 nfs_free_fhandle(res.fh);
6584 if (status)
6585 return status;
6586
6587 do_renew_lease(clp, now);
6588 return 0;
6589}
6590
6591#ifdef CONFIG_NFS_V4_1
6592
6593/*
6594 * This operation also signals the server that this client is
6595 * performing "lease moved" recovery. The server can stop asserting
6596 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6597 * this operation is identified in the SEQUENCE operation in this
6598 * compound.
6599 */
6600static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6601{
6602 struct nfs_server *server = NFS_SERVER(inode);
6603 struct rpc_clnt *clnt = server->client;
6604 struct nfs4_fsid_present_arg args = {
6605 .fh = NFS_FH(inode),
6606 };
6607 struct nfs4_fsid_present_res res = {
6608 };
6609 struct rpc_message msg = {
6610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6611 .rpc_argp = &args,
6612 .rpc_resp = &res,
6613 .rpc_cred = cred,
6614 };
6615 int status;
6616
6617 res.fh = nfs_alloc_fhandle();
6618 if (res.fh == NULL)
6619 return -ENOMEM;
6620
6621 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6622 nfs4_set_sequence_privileged(&args.seq_args);
6623 status = nfs4_call_sync_sequence(clnt, server, &msg,
6624 &args.seq_args, &res.seq_res);
6625 nfs_free_fhandle(res.fh);
6626 if (status == NFS4_OK &&
6627 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6628 status = -NFS4ERR_LEASE_MOVED;
6629 return status;
6630}
6631
6632#endif /* CONFIG_NFS_V4_1 */
6633
6634/**
6635 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6636 * @inode: inode on FSID to check
6637 * @cred: credential to use for this operation
6638 *
6639 * Server indicates whether the FSID is present, moved, or not
6640 * recognized. This operation is necessary to clear a LEASE_MOVED
6641 * condition for this client ID.
6642 *
6643 * Returns NFS4_OK if the FSID is present on this server,
6644 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6645 * NFS4ERR code if some error occurred on the server, or a
6646 * negative errno if a local failure occurred.
6647 */
6648int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6649{
6650 struct nfs_server *server = NFS_SERVER(inode);
6651 struct nfs_client *clp = server->nfs_client;
6652 const struct nfs4_mig_recovery_ops *ops =
6653 clp->cl_mvops->mig_recovery_ops;
6654 struct nfs4_exception exception = { };
6655 int status;
6656
6657 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6658 (unsigned long long)server->fsid.major,
6659 (unsigned long long)server->fsid.minor,
6660 clp->cl_hostname);
6661 nfs_display_fhandle(NFS_FH(inode), __func__);
6662
6663 do {
6664 status = ops->fsid_present(inode, cred);
6665 if (status != -NFS4ERR_DELAY)
6666 break;
6667 nfs4_handle_exception(server, status, &exception);
6668 } while (exception.retry);
6669 return status;
6670}
6671
5ec16a85 6672/**
a5250def
WAA		 6673 * If 'use_integrity' is true and the state managment nfs_client
6674 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6675 * and the machine credential as per RFC3530bis and RFC5661 Security
6676 * Considerations sections. Otherwise, just use the user cred with the
6677 * filesystem's rpc_client.
5ec16a85 6678 */
a5250def 6679static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6680{
6681 int status;
6682 struct nfs4_secinfo_arg args = {
6683 .dir_fh = NFS_FH(dir),
6684 .name = name,
6685 };
6686 struct nfs4_secinfo_res res = {
6687 .flavors = flavors,
6688 };
6689 struct rpc_message msg = {
6690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6691 .rpc_argp = &args,
6692 .rpc_resp = &res,
6693 };
a5250def 6694 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6695 struct rpc_cred *cred = NULL;
a5250def
WAA		 6696
6697 if (use_integrity) {
6698 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6699 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6700 msg.rpc_cred = cred;
a5250def 6701 }
5a5ea0d4
BS		 6702
6703 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6704
6705 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6706 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6707
a5250def
WAA		 6708 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6709 &res.seq_res, 0);
5a5ea0d4 6710 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6711
7cb852df
WAA		 6712 if (cred)
6713 put_rpccred(cred);
a5250def 6714
5a5ea0d4
BS		 6715 return status;
6716}
6717
72de53ec
BS		 6718int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6719 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6720{
6721 struct nfs4_exception exception = { };
6722 int err;
6723 do {
a5250def
WAA		 6724 err = -NFS4ERR_WRONGSEC;
6725
6726 /* try to use integrity protection with machine cred */
6727 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6728 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6729
6730 /*
6731 * if unable to use integrity protection, or SECINFO with
6732 * integrity protection returns NFS4ERR_WRONGSEC (which is
6733 * disallowed by spec, but exists in deployed servers) use
6734 * the current filesystem's rpc_client and the user cred.
6735 */
6736 if (err == -NFS4ERR_WRONGSEC)
6737 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6738
078ea3df
TM		 6739 trace_nfs4_secinfo(dir, name, err);
6740 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6741 &exception);
6742 } while (exception.retry);
6743 return err;
6744}
6745
557134a3 6746#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6747/*
6748 * Check the exchange flags returned by the server for invalid flags, having
6749 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6750 * DS flags set.
6751 */
6752static int nfs4_check_cl_exchange_flags(u32 flags)
6753{
6754 if (flags & ~EXCHGID4_FLAG_MASK_R)
6755 goto out_inval;
6756 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6757 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6758 goto out_inval;
6759 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6760 goto out_inval;
6761 return NFS_OK;
6762out_inval:
6763 return -NFS4ERR_INVAL;
6764}
6765
78fe0f41 6766static bool
79d4e1f0
CL		 6767nfs41_same_server_scope(struct nfs41_server_scope *a,
6768 struct nfs41_server_scope *b)
78fe0f41
WAA		 6769{
6770 if (a->server_scope_sz == b->server_scope_sz &&
6771 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6772 return true;
6773
6774 return false;
6775}
6776
7c44f1ae
WAA		 6777/*
6778 * nfs4_proc_bind_conn_to_session()
6779 *
6780 * The 4.1 client currently uses the same TCP connection for the
6781 * fore and backchannel.
6782 */
2cf047c9 6783int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6784{
6785 int status;
71a097c6
TM		 6786 struct nfs41_bind_conn_to_session_args args = {
6787 .client = clp,
6788 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6789 };
7c44f1ae
WAA		 6790 struct nfs41_bind_conn_to_session_res res;
6791 struct rpc_message msg = {
6792 .rpc_proc =
6793 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6794 .rpc_argp = &args,
7c44f1ae 6795 .rpc_resp = &res,
2cf047c9 6796 .rpc_cred = cred,
7c44f1ae
WAA		 6797 };
6798
6799 dprintk("--> %s\n", __func__);
7c44f1ae 6800
71a097c6
TM		 6801 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6802 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6803 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6804
6805 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6806 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6807 if (status == 0) {
71a097c6 6808 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6809 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6810 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6811 status = -EIO;
71a097c6 6812 goto out;
7c44f1ae 6813 }
71a097c6 6814 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6815 dprintk("NFS: %s: Unexpected direction from server\n",
6816 __func__);
6817 status = -EIO;
71a097c6 6818 goto out;
7c44f1ae 6819 }
71a097c6 6820 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6821 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6822 __func__);
6823 status = -EIO;
71a097c6 6824 goto out;
7c44f1ae
WAA		 6825 }
6826 }
7c44f1ae
WAA		 6827out:
6828 dprintk("<-- %s status= %d\n", __func__, status);
6829 return status;
6830}
6831
99fe60d0 6832/*
fa940720
WAA		 6833 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6834 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6835 */
6836static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6837 .how = SP4_MACH_CRED,
6838 .enforce.u.words = {
6839 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6840 1 << (OP_EXCHANGE_ID - 32) |
6841 1 << (OP_CREATE_SESSION - 32) |
6842 1 << (OP_DESTROY_SESSION - 32) |
6843 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6844 },
6845 .allow.u.words = {
6846 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6847 1 << (OP_LOCKU) |
6848 1 << (OP_COMMIT),
8b5bee2e 6849 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6850 1 << (OP_SECINFO_NO_NAME - 32) |
6851 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6852 1 << (OP_FREE_STATEID - 32) |
6853 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6854 }
6855};
6856
6857/*
6858 * Select the state protection mode for client `clp' given the server results
6859 * from exchange_id in `sp'.
99fe60d0 6860 *
2031cd1a
WAA		 6861 * Returns 0 on success, negative errno otherwise.
6862 */
6863static int nfs4_sp4_select_mode(struct nfs_client *clp,
6864 struct nfs41_state_protection *sp)
6865{
6866 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6867 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6868 1 << (OP_EXCHANGE_ID - 32) |
6869 1 << (OP_CREATE_SESSION - 32) |
6870 1 << (OP_DESTROY_SESSION - 32) |
6871 1 << (OP_DESTROY_CLIENTID - 32)
6872 };
6873 unsigned int i;
6874
6875 if (sp->how == SP4_MACH_CRED) {
6876 /* Print state protect result */
6877 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6878 for (i = 0; i <= LAST_NFS4_OP; i++) {
6879 if (test_bit(i, sp->enforce.u.longs))
6880 dfprintk(MOUNT, " enforce op %d\n", i);
6881 if (test_bit(i, sp->allow.u.longs))
6882 dfprintk(MOUNT, " allow op %d\n", i);
6883 }
6884
6885 /* make sure nothing is on enforce list that isn't supported */
6886 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6887 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6888 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6889 return -EINVAL;
6890 }
6891 }
6892
6893 /*
6894 * Minimal mode - state operations are allowed to use machine
6895 * credential. Note this already happens by default, so the
6896 * client doesn't have to do anything more than the negotiation.
6897 *
6898 * NOTE: we don't care if EXCHANGE_ID is in the list -
6899 * we're already using the machine cred for exchange_id
6900 * and will never use a different cred.
6901 */
6902 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6903 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6904 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6905 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6906 dfprintk(MOUNT, "sp4_mach_cred:\n");
6907 dfprintk(MOUNT, " minimal mode enabled\n");
6908 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6909 } else {
6910 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6911 return -EINVAL;
6912 }
fa940720
WAA		 6913
6914 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6915 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6916 dfprintk(MOUNT, " cleanup mode enabled\n");
6917 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6918 }
8b5bee2e
WAA		 6919
6920 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6921 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6922 dfprintk(MOUNT, " secinfo mode enabled\n");
6923 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6924 }
3787d506
WAA		 6925
6926 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6927 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6928 dfprintk(MOUNT, " stateid mode enabled\n");
6929 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6930 }
8c21c62c
WAA		 6931
6932 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6933 dfprintk(MOUNT, " write mode enabled\n");
6934 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6935 }
6936
6937 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6938 dfprintk(MOUNT, " commit mode enabled\n");
6939 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6940 }
2031cd1a
WAA		 6941 }
6942
6943 return 0;
6944}
6945
6946/*
6947 * _nfs4_proc_exchange_id()
6bbb4ae8 6948 *
2031cd1a 6949 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6950 */
2031cd1a
WAA		 6951static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6952 u32 sp4_how)
99fe60d0
BH		 6953{
6954 nfs4_verifier verifier;
6955 struct nfs41_exchange_id_args args = {
cd93710e 6956 .verifier = &verifier,
99fe60d0 6957 .client = clp,
cd3fadec 6958#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6959 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6960 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6961 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6962#else
6963 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6964 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6965#endif
99fe60d0
BH		 6966 };
6967 struct nfs41_exchange_id_res res = {
32b01310 6968 0
99fe60d0
BH		 6969 };
6970 int status;
6971 struct rpc_message msg = {
6972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6973 .rpc_argp = &args,
6974 .rpc_resp = &res,
6975 .rpc_cred = cred,
6976 };
99fe60d0 6977
f092075d 6978 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6979
6980 status = nfs4_init_uniform_client_string(clp);
6981 if (status)
3a6bb738 6982 goto out;
3a6bb738
JL		 6983
6984 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6985 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6986 clp->cl_owner_id);
99fe60d0 6987
acdeb69d 6988 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6989 GFP_NOFS);
acdeb69d 6990 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6991 status = -ENOMEM;
6992 goto out;
6993 }
78fe0f41 6994
79d4e1f0 6995 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6996 GFP_NOFS);
177313f1 6997 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6998 status = -ENOMEM;
acdeb69d 6999 goto out_server_owner;
abe9a6d5 7000 }
78fe0f41 7001
bbafffd2 7002 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7003 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7004 status = -ENOMEM;
7005 goto out_server_scope;
7006 }
7007
2031cd1a
WAA		 7008 switch (sp4_how) {
7009 case SP4_NONE:
7010 args.state_protect.how = SP4_NONE;
7011 break;
7012
7013 case SP4_MACH_CRED:
7014 args.state_protect = nfs4_sp4_mach_cred_request;
7015 break;
7016
7017 default:
7018 /* unsupported! */
7019 WARN_ON_ONCE(1);
7020 status = -EINVAL;
6b55970b 7021 goto out_impl_id;
2031cd1a
WAA		 7022 }
7023
1bd714f2 7024 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7025 trace_nfs4_exchange_id(clp, status);
177313f1 7026 if (status == 0)
32b01310 7027 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7028
2031cd1a
WAA		 7029 if (status == 0)
7030 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7031
acdeb69d 7032 if (status == 0) {
32b01310 7033 clp->cl_clientid = res.clientid;
e11259f9
TM		 7034 clp->cl_exchange_flags = res.flags;
7035 /* Client ID is not confirmed */
7036 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7037 clear_bit(NFS4_SESSION_ESTABLISHED,
7038 &clp->cl_session->session_state);
32b01310 7039 clp->cl_seqid = res.seqid;
e11259f9 7040 }
32b01310 7041
acdeb69d
CL		 7042 kfree(clp->cl_serverowner);
7043 clp->cl_serverowner = res.server_owner;
7044 res.server_owner = NULL;
78fe0f41 7045
7d2ed9ac 7046 /* use the most recent implementation id */
59155546
CL		 7047 kfree(clp->cl_implid);
7048 clp->cl_implid = res.impl_id;
6b55970b 7049 res.impl_id = NULL;
7d2ed9ac 7050
177313f1 7051 if (clp->cl_serverscope != NULL &&
79d4e1f0 7052 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7053 res.server_scope)) {
7054 dprintk("%s: server_scope mismatch detected\n",
7055 __func__);
7056 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7057 kfree(clp->cl_serverscope);
7058 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7059 }
7060
177313f1 7061 if (clp->cl_serverscope == NULL) {
79d4e1f0 7062 clp->cl_serverscope = res.server_scope;
6b55970b 7063 res.server_scope = NULL;
abe9a6d5 7064 }
6b55970b 7065 }
7d2ed9ac 7066
6b55970b
KM		 7067out_impl_id:
7068 kfree(res.impl_id);
7d2ed9ac 7069out_server_scope:
abe9a6d5 7070 kfree(res.server_scope);
6b55970b
KM		 7071out_server_owner:
7072 kfree(res.server_owner);
abe9a6d5 7073out:
177313f1 7074 if (clp->cl_implid != NULL)
6bbb4ae8 7075 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7076 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7077 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7078 clp->cl_implid->date.seconds,
7079 clp->cl_implid->date.nseconds);
6bbb4ae8 7080 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7081 return status;
7082}
7083
2031cd1a
WAA		 7084/*
7085 * nfs4_proc_exchange_id()
7086 *
7087 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7088 *
7089 * Since the clientid has expired, all compounds using sessions
7090 * associated with the stale clientid will be returning
7091 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7092 * be in some phase of session reset.
7093 *
7094 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7095 */
7096int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7097{
7098 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7099 int status;
7100
7101 /* try SP4_MACH_CRED if krb5i/p */
7102 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7103 authflavor == RPC_AUTH_GSS_KRB5P) {
7104 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7105 if (!status)
7106 return 0;
7107 }
7108
7109 /* try SP4_NONE */
7110 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7111}
7112
66245539
TM		 7113static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7114 struct rpc_cred *cred)
7115{
7116 struct rpc_message msg = {
7117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7118 .rpc_argp = clp,
7119 .rpc_cred = cred,
7120 };
7121 int status;
7122
7123 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7124 trace_nfs4_destroy_clientid(clp, status);
66245539 7125 if (status)
02c67525 7126 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7127 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7128 return status;
7129}
7130
7131static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7132 struct rpc_cred *cred)
7133{
7134 unsigned int loop;
7135 int ret;
7136
7137 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7138 ret = _nfs4_proc_destroy_clientid(clp, cred);
7139 switch (ret) {
7140 case -NFS4ERR_DELAY:
7141 case -NFS4ERR_CLIENTID_BUSY:
7142 ssleep(1);
7143 break;
7144 default:
7145 return ret;
7146 }
7147 }
7148 return 0;
7149}
7150
7151int nfs4_destroy_clientid(struct nfs_client *clp)
7152{
7153 struct rpc_cred *cred;
7154 int ret = 0;
7155
7156 if (clp->cl_mvops->minor_version < 1)
7157 goto out;
7158 if (clp->cl_exchange_flags == 0)
7159 goto out;
05f4c350
CL		 7160 if (clp->cl_preserve_clid)
7161 goto out;
73d8bde5 7162 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7163 ret = nfs4_proc_destroy_clientid(clp, cred);
7164 if (cred)
7165 put_rpccred(cred);
7166 switch (ret) {
7167 case 0:
7168 case -NFS4ERR_STALE_CLIENTID:
7169 clp->cl_exchange_flags = 0;
7170 }
7171out:
7172 return ret;
7173}
7174
2050f0cc
AA		 7175struct nfs4_get_lease_time_data {
7176 struct nfs4_get_lease_time_args *args;
7177 struct nfs4_get_lease_time_res *res;
7178 struct nfs_client *clp;
7179};
7180
7181static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7182 void *calldata)
7183{
2050f0cc
AA		 7184 struct nfs4_get_lease_time_data *data =
7185 (struct nfs4_get_lease_time_data *)calldata;
7186
7187 dprintk("--> %s\n", __func__);
7188 /* just setup sequence, do not trigger session recovery
7189 since we're invoked within one */
d9afbd1b
TM		 7190 nfs41_setup_sequence(data->clp->cl_session,
7191 &data->args->la_seq_args,
7192 &data->res->lr_seq_res,
7193 task);
2050f0cc
AA		 7194 dprintk("<-- %s\n", __func__);
7195}
7196
7197/*
7198 * Called from nfs4_state_manager thread for session setup, so don't recover
7199 * from sequence operation or clientid errors.
7200 */
7201static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7202{
7203 struct nfs4_get_lease_time_data *data =
7204 (struct nfs4_get_lease_time_data *)calldata;
7205
7206 dprintk("--> %s\n", __func__);
14516c3a
TM		 7207 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7208 return;
2050f0cc
AA		 7209 switch (task->tk_status) {
7210 case -NFS4ERR_DELAY:
7211 case -NFS4ERR_GRACE:
7212 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7213 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7214 task->tk_status = 0;
a8a4ae3a
AA		 7215 /* fall through */
7216 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7217 rpc_restart_call_prepare(task);
2050f0cc
AA		 7218 return;
7219 }
2050f0cc
AA		 7220 dprintk("<-- %s\n", __func__);
7221}
7222
17280175 7223static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7224 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7225 .rpc_call_done = nfs4_get_lease_time_done,
7226};
7227
7228int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7229{
7230 struct rpc_task *task;
7231 struct nfs4_get_lease_time_args args;
7232 struct nfs4_get_lease_time_res res = {
7233 .lr_fsinfo = fsinfo,
7234 };
7235 struct nfs4_get_lease_time_data data = {
7236 .args = &args,
7237 .res = &res,
7238 .clp = clp,
7239 };
7240 struct rpc_message msg = {
7241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7242 .rpc_argp = &args,
7243 .rpc_resp = &res,
7244 };
7245 struct rpc_task_setup task_setup = {
7246 .rpc_client = clp->cl_rpcclient,
7247 .rpc_message = &msg,
7248 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7249 .callback_data = &data,
7250 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7251 };
7252 int status;
7253
a9c92d6b 7254 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7255 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7256 dprintk("--> %s\n", __func__);
7257 task = rpc_run_task(&task_setup);
7258
7259 if (IS_ERR(task))
7260 status = PTR_ERR(task);
7261 else {
7262 status = task->tk_status;
7263 rpc_put_task(task);
7264 }
7265 dprintk("<-- %s return %d\n", __func__, status);
7266
7267 return status;
7268}
7269
fc931582
AA		 7270/*
7271 * Initialize the values to be used by the client in CREATE_SESSION
7272 * If nfs4_init_session set the fore channel request and response sizes,
7273 * use them.
7274 *
7275 * Set the back channel max_resp_sz_cached to zero to force the client to
7276 * always set csa_cachethis to FALSE because the current implementation
7277 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7278 */
7279static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7280{
18aad3d5
AA		 7281 unsigned int max_rqst_sz, max_resp_sz;
7282
7283 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7284 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7285
fc931582 7286 /* Fore channel attributes */
18aad3d5
AA		 7287 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7288 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7289 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7290 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7291
7292 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7293 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7294 __func__,
7295 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7296 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7297
7298 /* Back channel attributes */
fc931582
AA		 7299 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7300 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7301 args->bc_attrs.max_resp_sz_cached = 0;
7302 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7303 args->bc_attrs.max_reqs = 1;
7304
7305 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7306 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7307 __func__,
7308 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7309 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7310 args->bc_attrs.max_reqs);
7311}
7312
79969dd1
TM		 7313static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7314 struct nfs41_create_session_res *res)
8d35301d 7315{
43c2e885 7316 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7317 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7318
43c2e885
BF		 7319 if (rcvd->max_resp_sz > sent->max_resp_sz)
7320 return -EINVAL;
7321 /*
7322 * Our requested max_ops is the minimum we need; we're not
7323 * prepared to break up compounds into smaller pieces than that.
7324 * So, no point even trying to continue if the server won't
7325 * cooperate:
7326 */
7327 if (rcvd->max_ops < sent->max_ops)
7328 return -EINVAL;
7329 if (rcvd->max_reqs == 0)
7330 return -EINVAL;
b4b9a0c1
VG		 7331 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7332 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7333 return 0;
8d35301d
AA		 7334}
7335
79969dd1
TM		 7336static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7337 struct nfs41_create_session_res *res)
43c2e885
BF		 7338{
7339 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7340 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7341
b1c0df5f
TM		 7342 if (!(res->flags & SESSION4_BACK_CHAN))
7343 goto out;
43c2e885
BF		 7344 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7345 return -EINVAL;
7346 if (rcvd->max_resp_sz < sent->max_resp_sz)
7347 return -EINVAL;
7348 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7349 return -EINVAL;
7350 /* These would render the backchannel useless: */
b4b9a0c1 7351 if (rcvd->max_ops != sent->max_ops)
43c2e885 7352 return -EINVAL;
b4b9a0c1 7353 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7354 return -EINVAL;
b1c0df5f 7355out:
43c2e885
BF		 7356 return 0;
7357}
8d35301d 7358
8d35301d 7359static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7360 struct nfs41_create_session_res *res)
8d35301d 7361{
43c2e885 7362 int ret;
8d35301d 7363
79969dd1 7364 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7365 if (ret)
7366 return ret;
79969dd1
TM		 7367 return nfs4_verify_back_channel_attrs(args, res);
7368}
7369
7370static void nfs4_update_session(struct nfs4_session *session,
7371 struct nfs41_create_session_res *res)
7372{
7373 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7374 /* Mark client id and session as being confirmed */
7375 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7376 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7377 session->flags = res->flags;
7378 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7379 if (res->flags & SESSION4_BACK_CHAN)
7380 memcpy(&session->bc_attrs, &res->bc_attrs,
7381 sizeof(session->bc_attrs));
8d35301d
AA		 7382}
7383
848f5bda
TM		 7384static int _nfs4_proc_create_session(struct nfs_client *clp,
7385 struct rpc_cred *cred)
fc931582
AA		 7386{
7387 struct nfs4_session *session = clp->cl_session;
7388 struct nfs41_create_session_args args = {
7389 .client = clp,
79969dd1
TM		 7390 .clientid = clp->cl_clientid,
7391 .seqid = clp->cl_seqid,
fc931582
AA		 7392 .cb_program = NFS4_CALLBACK,
7393 };
79969dd1
TM		 7394 struct nfs41_create_session_res res;
7395
fc931582
AA		 7396 struct rpc_message msg = {
7397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7398 .rpc_argp = &args,
7399 .rpc_resp = &res,
848f5bda 7400 .rpc_cred = cred,
fc931582
AA		 7401 };
7402 int status;
7403
7404 nfs4_init_channel_attrs(&args);
0f91421e 7405 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7406
1bd714f2 7407 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7408 trace_nfs4_create_session(clp, status);
fc931582 7409
43095d39 7410 if (!status) {
8d35301d 7411 /* Verify the session's negotiated channel_attrs values */
79969dd1 7412 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7413 /* Increment the clientid slot sequence id */
79969dd1
TM		 7414 if (clp->cl_seqid == res.seqid)
7415 clp->cl_seqid++;
7416 if (status)
7417 goto out;
7418 nfs4_update_session(session, &res);
fc931582 7419 }
79969dd1 7420out:
fc931582
AA		 7421 return status;
7422}
7423
7424/*
7425 * Issues a CREATE_SESSION operation to the server.
7426 * It is the responsibility of the caller to verify the session is
7427 * expired before calling this routine.
7428 */
848f5bda 7429int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7430{
7431 int status;
7432 unsigned *ptr;
fc931582
AA		 7433 struct nfs4_session *session = clp->cl_session;
7434
7435 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7436
848f5bda 7437 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7438 if (status)
7439 goto out;
7440
aacd5537
AA		 7441 /* Init or reset the session slot tables */
7442 status = nfs4_setup_session_slot_tables(session);
7443 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7444 if (status)
7445 goto out;
7446
7447 ptr = (unsigned *)&session->sess_id.data[0];
7448 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7449 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7450out:
7451 dprintk("<-- %s\n", __func__);
7452 return status;
7453}
7454
0f3e66c6
AA		 7455/*
7456 * Issue the over-the-wire RPC DESTROY_SESSION.
7457 * The caller must serialize access to this routine.
7458 */
848f5bda
TM		 7459int nfs4_proc_destroy_session(struct nfs4_session *session,
7460 struct rpc_cred *cred)
0f3e66c6 7461{
848f5bda
TM		 7462 struct rpc_message msg = {
7463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7464 .rpc_argp = session,
7465 .rpc_cred = cred,
7466 };
0f3e66c6 7467 int status = 0;
0f3e66c6
AA		 7468
7469 dprintk("--> nfs4_proc_destroy_session\n");
7470
7471 /* session is still being setup */
e11259f9
TM		 7472 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7473 return 0;
0f3e66c6 7474
1bd714f2 7475 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7476 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7477
7478 if (status)
08106ac7 7479 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7480 "Session has been destroyed regardless...\n", status);
7481
7482 dprintk("<-- nfs4_proc_destroy_session\n");
7483 return status;
7484}
7485
fc01cea9
AA		 7486/*
7487 * Renew the cl_session lease.
7488 */
d5f8d3fe
TM		 7489struct nfs4_sequence_data {
7490 struct nfs_client *clp;
7491 struct nfs4_sequence_args args;
7492 struct nfs4_sequence_res res;
7493};
7494
dc96aef9
AB		 7495static void nfs41_sequence_release(void *data)
7496{
d5f8d3fe
TM		 7497 struct nfs4_sequence_data *calldata = data;
7498 struct nfs_client *clp = calldata->clp;
dc96aef9 7499
7135840f
AB		 7500 if (atomic_read(&clp->cl_count) > 1)
7501 nfs4_schedule_state_renewal(clp);
7502 nfs_put_client(clp);
d5f8d3fe 7503 kfree(calldata);
dc96aef9
AB		 7504}
7505
aa5190d0
TM		 7506static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7507{
7508 switch(task->tk_status) {
7509 case -NFS4ERR_DELAY:
aa5190d0
TM		 7510 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7511 return -EAGAIN;
7512 default:
0400a6b0 7513 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7514 }
7515 return 0;
7516}
7517
dc96aef9 7518static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7519{
d5f8d3fe
TM		 7520 struct nfs4_sequence_data *calldata = data;
7521 struct nfs_client *clp = calldata->clp;
fc01cea9 7522
14516c3a
TM		 7523 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7524 return;
fc01cea9 7525
c6d01c6f 7526 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7527 if (task->tk_status < 0) {
7528 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7529 if (atomic_read(&clp->cl_count) == 1)
7530 goto out;
fc01cea9 7531
aa5190d0
TM		 7532 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7533 rpc_restart_call_prepare(task);
fc01cea9
AA		 7534 return;
7535 }
7536 }
fc01cea9 7537 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7538out:
fc01cea9
AA		 7539 dprintk("<-- %s\n", __func__);
7540}
7541
7542static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7543{
d5f8d3fe
TM		 7544 struct nfs4_sequence_data *calldata = data;
7545 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7546 struct nfs4_sequence_args *args;
7547 struct nfs4_sequence_res *res;
7548
fc01cea9
AA		 7549 args = task->tk_msg.rpc_argp;
7550 res = task->tk_msg.rpc_resp;
7551
d9afbd1b 7552 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7553}
7554
7555static const struct rpc_call_ops nfs41_sequence_ops = {
7556 .rpc_call_done = nfs41_sequence_call_done,
7557 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7558 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7559};
7560
8fe72bac
TM		 7561static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7562 struct rpc_cred *cred,
7563 bool is_privileged)
fc01cea9 7564{
d5f8d3fe 7565 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7566 struct rpc_message msg = {
7567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7568 .rpc_cred = cred,
7569 };
71ac6da9
TM		 7570 struct rpc_task_setup task_setup_data = {
7571 .rpc_client = clp->cl_rpcclient,
7572 .rpc_message = &msg,
8fe72bac 7573 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7574 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7575 };
fc01cea9 7576
7135840f 7577 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7578 return ERR_PTR(-EIO);
dfb4f309 7579 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7580 if (calldata == NULL) {
7135840f 7581 nfs_put_client(clp);
71ac6da9 7582 return ERR_PTR(-ENOMEM);
fc01cea9 7583 }
a9c92d6b 7584 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7585 if (is_privileged)
7586 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7587 msg.rpc_argp = &calldata->args;
7588 msg.rpc_resp = &calldata->res;
7589 calldata->clp = clp;
71ac6da9 7590 task_setup_data.callback_data = calldata;
fc01cea9 7591
71ac6da9
TM		 7592 return rpc_run_task(&task_setup_data);
7593}
7594
2f60ea6b 7595static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7596{
7597 struct rpc_task *task;
7598 int ret = 0;
7599
2f60ea6b 7600 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7601 return -EAGAIN;
8fe72bac 7602 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7603 if (IS_ERR(task))
7604 ret = PTR_ERR(task);
7605 else
bf294b41 7606 rpc_put_task_async(task);
71ac6da9
TM		 7607 dprintk("<-- %s status=%d\n", __func__, ret);
7608 return ret;
7609}
7610
7611static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7612{
7613 struct rpc_task *task;
7614 int ret;
7615
8fe72bac 7616 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7617 if (IS_ERR(task)) {
7618 ret = PTR_ERR(task);
7619 goto out;
7620 }
7621 ret = rpc_wait_for_completion_task(task);
be824167 7622 if (!ret)
71ac6da9
TM		 7623 ret = task->tk_status;
7624 rpc_put_task(task);
7625out:
7626 dprintk("<-- %s status=%d\n", __func__, ret);
7627 return ret;
fc01cea9
AA		 7628}
7629
fce5c838
RL		 7630struct nfs4_reclaim_complete_data {
7631 struct nfs_client *clp;
7632 struct nfs41_reclaim_complete_args arg;
7633 struct nfs41_reclaim_complete_res res;
7634};
7635
7636static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7637{
7638 struct nfs4_reclaim_complete_data *calldata = data;
7639
d9afbd1b
TM		 7640 nfs41_setup_sequence(calldata->clp->cl_session,
7641 &calldata->arg.seq_args,
7642 &calldata->res.seq_res,
7643 task);
fce5c838
RL		 7644}
7645
aa5190d0
TM		 7646static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7647{
7648 switch(task->tk_status) {
7649 case 0:
7650 case -NFS4ERR_COMPLETE_ALREADY:
7651 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7652 break;
7653 case -NFS4ERR_DELAY:
aa5190d0 7654 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7655 /* fall through */
7656 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7657 return -EAGAIN;
7658 default:
0400a6b0 7659 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7660 }
7661 return 0;
7662}
7663
fce5c838
RL		 7664static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7665{
7666 struct nfs4_reclaim_complete_data *calldata = data;
7667 struct nfs_client *clp = calldata->clp;
7668 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7669
7670 dprintk("--> %s\n", __func__);
14516c3a
TM		 7671 if (!nfs41_sequence_done(task, res))
7672 return;
fce5c838 7673
c6d01c6f 7674 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7675 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7676 rpc_restart_call_prepare(task);
7677 return;
7678 }
fce5c838
RL		 7679 dprintk("<-- %s\n", __func__);
7680}
7681
7682static void nfs4_free_reclaim_complete_data(void *data)
7683{
7684 struct nfs4_reclaim_complete_data *calldata = data;
7685
7686 kfree(calldata);
7687}
7688
7689static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7690 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7691 .rpc_call_done = nfs4_reclaim_complete_done,
7692 .rpc_release = nfs4_free_reclaim_complete_data,
7693};
7694
7695/*
7696 * Issue a global reclaim complete.
7697 */
965e9c23
TM		 7698static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7699 struct rpc_cred *cred)
fce5c838
RL		 7700{
7701 struct nfs4_reclaim_complete_data *calldata;
7702 struct rpc_task *task;
7703 struct rpc_message msg = {
7704 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7705 .rpc_cred = cred,
fce5c838
RL		 7706 };
7707 struct rpc_task_setup task_setup_data = {
7708 .rpc_client = clp->cl_rpcclient,
7709 .rpc_message = &msg,
7710 .callback_ops = &nfs4_reclaim_complete_call_ops,
7711 .flags = RPC_TASK_ASYNC,
7712 };
7713 int status = -ENOMEM;
7714
7715 dprintk("--> %s\n", __func__);
8535b2be 7716 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7717 if (calldata == NULL)
7718 goto out;
7719 calldata->clp = clp;
7720 calldata->arg.one_fs = 0;
fce5c838 7721
a9c92d6b 7722 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7723 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7724 msg.rpc_argp = &calldata->arg;
7725 msg.rpc_resp = &calldata->res;
7726 task_setup_data.callback_data = calldata;
7727 task = rpc_run_task(&task_setup_data);
acf82b85 7728 if (IS_ERR(task)) {
fce5c838 7729 status = PTR_ERR(task);
acf82b85
DC		 7730 goto out;
7731 }
c34c32ea
AA		 7732 status = nfs4_wait_for_completion_rpc_task(task);
7733 if (status == 0)
7734 status = task->tk_status;
fce5c838 7735 rpc_put_task(task);
acf82b85 7736 return 0;
fce5c838
RL		 7737out:
7738 dprintk("<-- %s status=%d\n", __func__, status);
7739 return status;
7740}
b1f69b75
AA		 7741
7742static void
7743nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7744{
7745 struct nfs4_layoutget *lgp = calldata;
c31663d4 7746 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7747 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7748
7749 dprintk("--> %s\n", __func__);
c31663d4
FI		 7750 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7751 * right now covering the LAYOUTGET we are about to send.
7752 * However, that is not so catastrophic, and there seems
7753 * to be no way to prevent it completely.
7754 */
6ba7db34 7755 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7756 &lgp->res.seq_res, task))
b1f69b75 7757 return;
cf7d63f1
FI		 7758 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7759 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7760 &lgp->args.range,
cf7d63f1
FI		 7761 lgp->args.ctx->state)) {
7762 rpc_exit(task, NFS4_OK);
cf7d63f1 7763 }
b1f69b75
AA		 7764}
7765
7766static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7767{
7768 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7769 struct inode *inode = lgp->args.inode;
7770 struct nfs_server *server = NFS_SERVER(inode);
7771 struct pnfs_layout_hdr *lo;
7772 struct nfs4_state *state = NULL;
ed7e5423 7773 unsigned long timeo, now, giveup;
b1f69b75 7774
ed7e5423 7775 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7776
6ba7db34 7777 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7778 goto out;
b1f69b75
AA		 7779
7780 switch (task->tk_status) {
7781 case 0:
ee314c2a 7782 goto out;
21b874c8
TM		 7783 /*
7784 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7785 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7786 */
7787 case -NFS4ERR_BADLAYOUT:
7788 goto out_overflow;
ed7e5423
BH		 7789 /*
7790 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7791 * (or clients) writing to the same RAID stripe except when
7792 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7793 */
b1f69b75 7794 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7795 if (lgp->args.minlength == 0)
7796 goto out_overflow;
ed7e5423
BH		 7797 /*
7798 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7799 * existing layout before getting a new one).
7800 */
b1f69b75 7801 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7802 timeo = rpc_get_timeout(task->tk_client);
7803 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7804 now = jiffies;
7805 if (time_after(giveup, now)) {
7806 unsigned long delay;
7807
7808 /* Delay for:
7809 * - Not less then NFS4_POLL_RETRY_MIN.
7810 * - One last time a jiffie before we give up
7811 * - exponential backoff (time_now minus start_attempt)
7812 */
7813 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7814 min((giveup - now - 1),
7815 now - lgp->args.timestamp));
7816
7817 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7818 __func__, delay);
7819 rpc_delay(task, delay);
7820 task->tk_status = 0;
7821 rpc_restart_call_prepare(task);
7822 goto out; /* Do not call nfs4_async_handle_error() */
7823 }
ee314c2a
TM		 7824 break;
7825 case -NFS4ERR_EXPIRED:
7826 case -NFS4ERR_BAD_STATEID:
7827 spin_lock(&inode->i_lock);
7828 lo = NFS_I(inode)->layout;
7829 if (!lo || list_empty(&lo->plh_segs)) {
7830 spin_unlock(&inode->i_lock);
7831 /* If the open stateid was bad, then recover it. */
7832 state = lgp->args.ctx->state;
7833 } else {
7834 LIST_HEAD(head);
7835
defb8460
CH		 7836 /*
7837 * Mark the bad layout state as invalid, then retry
7838 * with the current stateid.
7839 */
ee314c2a
TM		 7840 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7841 spin_unlock(&inode->i_lock);
ee314c2a 7842 pnfs_free_lseg_list(&head);
defb8460
CH		 7843
7844 task->tk_status = 0;
7845 rpc_restart_call_prepare(task);
b1f69b75
AA		 7846 }
7847 }
8478eaa1 7848 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7849 rpc_restart_call_prepare(task);
7850out:
b1f69b75 7851 dprintk("<-- %s\n", __func__);
21b874c8
TM		 7852 return;
7853out_overflow:
7854 task->tk_status = -EOVERFLOW;
7855 goto out;
b1f69b75
AA		 7856}
7857
8554116e
IK		 7858static size_t max_response_pages(struct nfs_server *server)
7859{
7860 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7861 return nfs_page_array_len(0, max_resp_sz);
7862}
7863
7864static void nfs4_free_pages(struct page **pages, size_t size)
7865{
7866 int i;
7867
7868 if (!pages)
7869 return;
7870
7871 for (i = 0; i < size; i++) {
7872 if (!pages[i])
7873 break;
7874 __free_page(pages[i]);
7875 }
7876 kfree(pages);
7877}
7878
7879static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7880{
7881 struct page **pages;
7882 int i;
7883
7884 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7885 if (!pages) {
7886 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7887 return NULL;
7888 }
7889
7890 for (i = 0; i < size; i++) {
7891 pages[i] = alloc_page(gfp_flags);
7892 if (!pages[i]) {
7893 dprintk("%s: failed to allocate page\n", __func__);
7894 nfs4_free_pages(pages, size);
7895 return NULL;
7896 }
7897 }
7898
7899 return pages;
7900}
7901
b1f69b75
AA		 7902static void nfs4_layoutget_release(void *calldata)
7903{
7904 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7905 struct inode *inode = lgp->args.inode;
7906 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7907 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7908
7909 dprintk("--> %s\n", __func__);
8554116e 7910 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7911 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7912 put_nfs_open_context(lgp->args.ctx);
7913 kfree(calldata);
7914 dprintk("<-- %s\n", __func__);
7915}
7916
7917static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7918 .rpc_call_prepare = nfs4_layoutget_prepare,
7919 .rpc_call_done = nfs4_layoutget_done,
7920 .rpc_release = nfs4_layoutget_release,
7921};
7922
a0b0a6e3
TM		 7923struct pnfs_layout_segment *
7924nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7925{
a47970ff
WAA		 7926 struct inode *inode = lgp->args.inode;
7927 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7928 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7929 struct rpc_task *task;
7930 struct rpc_message msg = {
7931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7932 .rpc_argp = &lgp->args,
7933 .rpc_resp = &lgp->res,
6ab59344 7934 .rpc_cred = lgp->cred,
b1f69b75
AA		 7935 };
7936 struct rpc_task_setup task_setup_data = {
7937 .rpc_client = server->client,
7938 .rpc_message = &msg,
7939 .callback_ops = &nfs4_layoutget_call_ops,
7940 .callback_data = lgp,
7941 .flags = RPC_TASK_ASYNC,
7942 };
a0b0a6e3 7943 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7944 int status = 0;
7945
7946 dprintk("--> %s\n", __func__);
7947
4bd5a980
PT		 7948 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7949 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7950
8554116e
IK		 7951 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7952 if (!lgp->args.layout.pages) {
7953 nfs4_layoutget_release(lgp);
a0b0a6e3 7954 return ERR_PTR(-ENOMEM);
8554116e
IK		 7955 }
7956 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7957 lgp->args.timestamp = jiffies;
8554116e 7958
35124a09 7959 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7960 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7961 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7962
b1f69b75
AA		 7963 task = rpc_run_task(&task_setup_data);
7964 if (IS_ERR(task))
a0b0a6e3 7965 return ERR_CAST(task);
b1f69b75 7966 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7967 if (status == 0)
7968 status = task->tk_status;
1037e6ea
TM		 7969 trace_nfs4_layoutget(lgp->args.ctx,
7970 &lgp->args.range,
7971 &lgp->res.range,
7972 status);
085b7a45
WAA		 7973 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7974 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7975 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7976 rpc_put_task(task);
7977 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7978 if (status)
7979 return ERR_PTR(status);
7980 return lseg;
b1f69b75
AA		 7981}
7982
cbe82603
BH		 7983static void
7984nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7985{
7986 struct nfs4_layoutreturn *lrp = calldata;
7987
7988 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7989 nfs41_setup_sequence(lrp->clp->cl_session,
7990 &lrp->args.seq_args,
7991 &lrp->res.seq_res,
7992 task);
cbe82603
BH		 7993}
7994
7995static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7996{
7997 struct nfs4_layoutreturn *lrp = calldata;
7998 struct nfs_server *server;
7999
8000 dprintk("--> %s\n", __func__);
8001
6ba7db34 8002 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8003 return;
8004
8005 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8006 switch (task->tk_status) {
8007 default:
8008 task->tk_status = 0;
8009 case 0:
8010 break;
8011 case -NFS4ERR_DELAY:
8478eaa1 8012 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8013 break;
d00c5d43 8014 rpc_restart_call_prepare(task);
cbe82603
BH		 8015 return;
8016 }
cbe82603
BH		 8017 dprintk("<-- %s\n", __func__);
8018}
8019
8020static void nfs4_layoutreturn_release(void *calldata)
8021{
8022 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8023 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8024 LIST_HEAD(freeme);
cbe82603
BH		 8025
8026 dprintk("--> %s\n", __func__);
849b286f
TM		 8027 spin_lock(&lo->plh_inode->i_lock);
8028 if (lrp->res.lrs_present)
8029 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8030 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8031 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8032 lo->plh_block_lgets--;
8033 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8034 pnfs_free_lseg_list(&freeme);
70c3bd2b 8035 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8036 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8037 kfree(calldata);
8038 dprintk("<-- %s\n", __func__);
8039}
8040
8041static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8042 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8043 .rpc_call_done = nfs4_layoutreturn_done,
8044 .rpc_release = nfs4_layoutreturn_release,
8045};
8046
6c16605d 8047int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8048{
8049 struct rpc_task *task;
8050 struct rpc_message msg = {
8051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8052 .rpc_argp = &lrp->args,
8053 .rpc_resp = &lrp->res,
9556000d 8054 .rpc_cred = lrp->cred,
cbe82603
BH		 8055 };
8056 struct rpc_task_setup task_setup_data = {
1771c577 8057 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8058 .rpc_message = &msg,
8059 .callback_ops = &nfs4_layoutreturn_call_ops,
8060 .callback_data = lrp,
8061 };
6c16605d 8062 int status = 0;
cbe82603
BH		 8063
8064 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8065 if (!sync) {
8066 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8067 if (!lrp->inode) {
8068 nfs4_layoutreturn_release(lrp);
8069 return -EAGAIN;
8070 }
8071 task_setup_data.flags |= RPC_TASK_ASYNC;
8072 }
a9c92d6b 8073 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8074 task = rpc_run_task(&task_setup_data);
8075 if (IS_ERR(task))
8076 return PTR_ERR(task);
5a0ec8ac
TM		 8077 if (sync)
8078 status = task->tk_status;
1037e6ea 8079 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8080 dprintk("<-- %s status=%d\n", __func__, status);
8081 rpc_put_task(task);
8082 return status;
8083}
8084
b1f69b75 8085static int
cd5875fe
TM		 8086_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8087 struct pnfs_device *pdev,
8088 struct rpc_cred *cred)
b1f69b75
AA		 8089{
8090 struct nfs4_getdeviceinfo_args args = {
8091 .pdev = pdev,
4e590803
TM		 8092 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8093 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8094 };
8095 struct nfs4_getdeviceinfo_res res = {
8096 .pdev = pdev,
8097 };
8098 struct rpc_message msg = {
8099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8100 .rpc_argp = &args,
8101 .rpc_resp = &res,
cd5875fe 8102 .rpc_cred = cred,
b1f69b75
AA		 8103 };
8104 int status;
8105
8106 dprintk("--> %s\n", __func__);
7c513058 8107 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8108 if (res.notification & ~args.notify_types)
8109 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8110 if (res.notification != args.notify_types)
8111 pdev->nocache = 1;
4e590803 8112
b1f69b75
AA		 8113 dprintk("<-- %s status=%d\n", __func__, status);
8114
8115 return status;
8116}
8117
cd5875fe
TM		 8118int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8119 struct pnfs_device *pdev,
8120 struct rpc_cred *cred)
b1f69b75
AA		 8121{
8122 struct nfs4_exception exception = { };
8123 int err;
8124
8125 do {
8126 err = nfs4_handle_exception(server,
cd5875fe 8127 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8128 &exception);
8129 } while (exception.retry);
8130 return err;
8131}
8132EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8133
863a3c6c
AA		 8134static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8135{
8136 struct nfs4_layoutcommit_data *data = calldata;
8137 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8138 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8139
d9afbd1b
TM		 8140 nfs41_setup_sequence(session,
8141 &data->args.seq_args,
8142 &data->res.seq_res,
8143 task);
863a3c6c
AA		 8144}
8145
8146static void
8147nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8148{
8149 struct nfs4_layoutcommit_data *data = calldata;
8150 struct nfs_server *server = NFS_SERVER(data->args.inode);
8151
6ba7db34 8152 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8153 return;
8154
8155 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8156 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8157 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8158 case -NFS4ERR_BADLAYOUT: /* no layout */
8159 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8160 task->tk_status = 0;
e59d27e0 8161 case 0:
e59d27e0
TM		 8162 break;
8163 default:
8478eaa1 8164 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8165 rpc_restart_call_prepare(task);
8166 return;
8167 }
8168 }
863a3c6c
AA		 8169}
8170
8171static void nfs4_layoutcommit_release(void *calldata)
8172{
8173 struct nfs4_layoutcommit_data *data = calldata;
8174
db29c089 8175 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8176 nfs_post_op_update_inode_force_wcc(data->args.inode,
8177 data->res.fattr);
863a3c6c 8178 put_rpccred(data->cred);
472e2594 8179 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8180 kfree(data);
8181}
8182
8183static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8184 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8185 .rpc_call_done = nfs4_layoutcommit_done,
8186 .rpc_release = nfs4_layoutcommit_release,
8187};
8188
8189int
ef311537 8190nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8191{
8192 struct rpc_message msg = {
8193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8194 .rpc_argp = &data->args,
8195 .rpc_resp = &data->res,
8196 .rpc_cred = data->cred,
8197 };
8198 struct rpc_task_setup task_setup_data = {
8199 .task = &data->task,
8200 .rpc_client = NFS_CLIENT(data->args.inode),
8201 .rpc_message = &msg,
8202 .callback_ops = &nfs4_layoutcommit_ops,
8203 .callback_data = data,
863a3c6c
AA		 8204 };
8205 struct rpc_task *task;
8206 int status = 0;
8207
b4839ebe
KM		 8208 dprintk("NFS: initiating layoutcommit call. sync %d "
8209 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8210 data->args.lastbytewritten,
8211 data->args.inode->i_ino);
8212
472e2594
TM		 8213 if (!sync) {
8214 data->inode = nfs_igrab_and_active(data->args.inode);
8215 if (data->inode == NULL) {
8216 nfs4_layoutcommit_release(data);
8217 return -EAGAIN;
8218 }
8219 task_setup_data.flags = RPC_TASK_ASYNC;
8220 }
a9c92d6b 8221 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8222 task = rpc_run_task(&task_setup_data);
8223 if (IS_ERR(task))
8224 return PTR_ERR(task);
472e2594
TM		 8225 if (sync)
8226 status = task->tk_status;
1037e6ea 8227 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8228 dprintk("%s: status %d\n", __func__, status);
8229 rpc_put_task(task);
8230 return status;
8231}
fca78d6d 8232
97431204
AA		 8233/**
8234 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8235 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8236 */
fca78d6d
BS		 8237static int
8238_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8239 struct nfs_fsinfo *info,
8240 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8241{
8242 struct nfs41_secinfo_no_name_args args = {
8243 .style = SECINFO_STYLE_CURRENT_FH,
8244 };
8245 struct nfs4_secinfo_res res = {
8246 .flavors = flavors,
8247 };
8248 struct rpc_message msg = {
8249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8250 .rpc_argp = &args,
8251 .rpc_resp = &res,
8252 };
b1b3e136 8253 struct rpc_clnt *clnt = server->client;
7cb852df 8254 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8255 int status;
8256
8257 if (use_integrity) {
8258 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8259 cred = nfs4_get_clid_cred(server->nfs_client);
8260 msg.rpc_cred = cred;
b1b3e136
WAA		 8261 }
8262
8263 dprintk("--> %s\n", __func__);
8264 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8265 &res.seq_res, 0);
8266 dprintk("<-- %s status=%d\n", __func__, status);
8267
7cb852df
WAA		 8268 if (cred)
8269 put_rpccred(cred);
b1b3e136
WAA		 8270
8271 return status;
fca78d6d
BS		 8272}
8273
8274static int
8275nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8276 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8277{
8278 struct nfs4_exception exception = { };
8279 int err;
8280 do {
b1b3e136
WAA		 8281 /* first try using integrity protection */
8282 err = -NFS4ERR_WRONGSEC;
8283
8284 /* try to use integrity protection with machine cred */
8285 if (_nfs4_is_integrity_protected(server->nfs_client))
8286 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8287 flavors, true);
8288
8289 /*
8290 * if unable to use integrity protection, or SECINFO with
8291 * integrity protection returns NFS4ERR_WRONGSEC (which is
8292 * disallowed by spec, but exists in deployed servers) use
8293 * the current filesystem's rpc_client and the user cred.
8294 */
8295 if (err == -NFS4ERR_WRONGSEC)
8296 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8297 flavors, false);
8298
fca78d6d
BS		 8299 switch (err) {
8300 case 0:
8301 case -NFS4ERR_WRONGSEC:
78b19bae 8302 case -ENOTSUPP:
05e9cfb4 8303 goto out;
fca78d6d
BS		 8304 default:
8305 err = nfs4_handle_exception(server, err, &exception);
8306 }
8307 } while (exception.retry);
05e9cfb4 8308out:
fca78d6d
BS		 8309 return err;
8310}
8311
8312static int
8313nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8314 struct nfs_fsinfo *info)
8315{
8316 int err;
8317 struct page *page;
367156d9 8318 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8319 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8320 struct nfs4_secinfo4 *secinfo;
8321 int i;
fca78d6d
BS		 8322
8323 page = alloc_page(GFP_KERNEL);
8324 if (!page) {
8325 err = -ENOMEM;
8326 goto out;
8327 }
8328
8329 flavors = page_address(page);
8330 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8331
8332 /*
8333 * Fall back on "guess and check" method if
8334 * the server doesn't support SECINFO_NO_NAME
8335 */
78b19bae 8336 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8337 err = nfs4_find_root_sec(server, fhandle, info);
8338 goto out_freepage;
8339 }
8340 if (err)
8341 goto out_freepage;
8342
58a8cf12
WAA		 8343 for (i = 0; i < flavors->num_flavors; i++) {
8344 secinfo = &flavors->flavors[i];
8345
8346 switch (secinfo->flavor) {
8347 case RPC_AUTH_NULL:
8348 case RPC_AUTH_UNIX:
8349 case RPC_AUTH_GSS:
8350 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8351 &secinfo->flavor_info);
8352 break;
8353 default:
8354 flavor = RPC_AUTH_MAXFLAVOR;
8355 break;
8356 }
8357
4d4b69dd
WAA		 8358 if (!nfs_auth_info_match(&server->auth_info, flavor))
8359 flavor = RPC_AUTH_MAXFLAVOR;
8360
58a8cf12
WAA		 8361 if (flavor != RPC_AUTH_MAXFLAVOR) {
8362 err = nfs4_lookup_root_sec(server, fhandle,
8363 info, flavor);
8364 if (!err)
8365 break;
8366 }
8367 }
8368
8369 if (flavor == RPC_AUTH_MAXFLAVOR)
8370 err = -EPERM;
fca78d6d
BS		 8371
8372out_freepage:
8373 put_page(page);
8374 if (err == -EACCES)
8375 return -EPERM;
8376out:
8377 return err;
8378}
1cab0652 8379
ab7cb0df
TM		 8380static int _nfs41_test_stateid(struct nfs_server *server,
8381 nfs4_stateid *stateid,
8382 struct rpc_cred *cred)
7d974794
BS		 8383{
8384 int status;
8385 struct nfs41_test_stateid_args args = {
1cab0652 8386 .stateid = stateid,
7d974794
BS		 8387 };
8388 struct nfs41_test_stateid_res res;
8389 struct rpc_message msg = {
8390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8391 .rpc_argp = &args,
8392 .rpc_resp = &res,
ab7cb0df 8393 .rpc_cred = cred,
7d974794 8394 };
3787d506
WAA		 8395 struct rpc_clnt *rpc_client = server->client;
8396
8397 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8398 &rpc_client, &msg);
1cab0652 8399
38527b15 8400 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8401 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8402 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8403 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8404 &args.seq_args, &res.seq_res);
38527b15
CL		 8405 if (status != NFS_OK) {
8406 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8407 return status;
38527b15
CL		 8408 }
8409 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8410 return -res.status;
7d974794
BS		 8411}
8412
38527b15
CL		 8413/**
8414 * nfs41_test_stateid - perform a TEST_STATEID operation
8415 *
8416 * @server: server / transport on which to perform the operation
8417 * @stateid: state ID to test
ab7cb0df 8418 * @cred: credential
38527b15
CL		 8419 *
8420 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8421 * Otherwise a negative NFS4ERR value is returned if the operation
8422 * failed or the state ID is not currently valid.
8423 */
ab7cb0df
TM		 8424static int nfs41_test_stateid(struct nfs_server *server,
8425 nfs4_stateid *stateid,
8426 struct rpc_cred *cred)
7d974794
BS		 8427{
8428 struct nfs4_exception exception = { };
8429 int err;
8430 do {
ab7cb0df 8431 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8432 if (err != -NFS4ERR_DELAY)
8433 break;
8434 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8435 } while (exception.retry);
8436 return err;
8437}
9aeda35f 8438
7c1d5fae
TM		 8439struct nfs_free_stateid_data {
8440 struct nfs_server *server;
8441 struct nfs41_free_stateid_args args;
9aeda35f 8442 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8443};
8444
8445static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8446{
8447 struct nfs_free_stateid_data *data = calldata;
8448 nfs41_setup_sequence(nfs4_get_session(data->server),
8449 &data->args.seq_args,
8450 &data->res.seq_res,
8451 task);
8452}
8453
8454static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8455{
8456 struct nfs_free_stateid_data *data = calldata;
8457
8458 nfs41_sequence_done(task, &data->res.seq_res);
8459
8460 switch (task->tk_status) {
8461 case -NFS4ERR_DELAY:
8478eaa1 8462 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8463 rpc_restart_call_prepare(task);
8464 }
8465}
8466
8467static void nfs41_free_stateid_release(void *calldata)
8468{
8469 kfree(calldata);
8470}
8471
17f26b12 8472static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8473 .rpc_call_prepare = nfs41_free_stateid_prepare,
8474 .rpc_call_done = nfs41_free_stateid_done,
8475 .rpc_release = nfs41_free_stateid_release,
8476};
8477
8478static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8479 nfs4_stateid *stateid,
ab7cb0df 8480 struct rpc_cred *cred,
7c1d5fae
TM		 8481 bool privileged)
8482{
9aeda35f
BS		 8483 struct rpc_message msg = {
8484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8485 .rpc_cred = cred,
9aeda35f 8486 };
7c1d5fae
TM		 8487 struct rpc_task_setup task_setup = {
8488 .rpc_client = server->client,
8489 .rpc_message = &msg,
8490 .callback_ops = &nfs41_free_stateid_ops,
8491 .flags = RPC_TASK_ASYNC,
8492 };
8493 struct nfs_free_stateid_data *data;
9aeda35f 8494
3787d506
WAA		 8495 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8496 &task_setup.rpc_client, &msg);
8497
38527b15 8498 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8499 data = kmalloc(sizeof(*data), GFP_NOFS);
8500 if (!data)
8501 return ERR_PTR(-ENOMEM);
8502 data->server = server;
8503 nfs4_stateid_copy(&data->args.stateid, stateid);
8504
8505 task_setup.callback_data = data;
8506
8507 msg.rpc_argp = &data->args;
8508 msg.rpc_resp = &data->res;
a9c92d6b 8509 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8510 if (privileged)
8511 nfs4_set_sequence_privileged(&data->args.seq_args);
8512
8513 return rpc_run_task(&task_setup);
9aeda35f
BS		 8514}
8515
38527b15
CL		 8516/**
8517 * nfs41_free_stateid - perform a FREE_STATEID operation
8518 *
8519 * @server: server / transport on which to perform the operation
8520 * @stateid: state ID to release
ab7cb0df 8521 * @cred: credential
38527b15
CL		 8522 *
8523 * Returns NFS_OK if the server freed "stateid". Otherwise a
8524 * negative NFS4ERR value is returned.
8525 */
ab7cb0df
TM		 8526static int nfs41_free_stateid(struct nfs_server *server,
8527 nfs4_stateid *stateid,
8528 struct rpc_cred *cred)
9aeda35f 8529{
7c1d5fae
TM		 8530 struct rpc_task *task;
8531 int ret;
8532
ab7cb0df 8533 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8534 if (IS_ERR(task))
8535 return PTR_ERR(task);
8536 ret = rpc_wait_for_completion_task(task);
8537 if (!ret)
8538 ret = task->tk_status;
8539 rpc_put_task(task);
8540 return ret;
9aeda35f 8541}
36281caa 8542
f1cdae87
JL		 8543static void
8544nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8545{
8546 struct rpc_task *task;
ab7cb0df 8547 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8548
ab7cb0df 8549 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8550 nfs4_free_lock_state(server, lsp);
8551 if (IS_ERR(task))
f1cdae87 8552 return;
c8b2d0bf 8553 rpc_put_task(task);
c8b2d0bf
TM		 8554}
8555
36281caa
TM		 8556static bool nfs41_match_stateid(const nfs4_stateid *s1,
8557 const nfs4_stateid *s2)
8558{
2d2f24ad 8559 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8560 return false;
8561
2d2f24ad 8562 if (s1->seqid == s2->seqid)
36281caa 8563 return true;
2d2f24ad 8564 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8565 return true;
8566
8567 return false;
8568}
8569
557134a3
AA		 8570#endif /* CONFIG_NFS_V4_1 */
8571
36281caa
TM		 8572static bool nfs4_match_stateid(const nfs4_stateid *s1,
8573 const nfs4_stateid *s2)
8574{
f597c537 8575 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8576}
8577
8578
17280175 8579static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8580 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8581 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8582 .recover_open = nfs4_open_reclaim,
8583 .recover_lock = nfs4_lock_reclaim,
591d71cb 8584 .establish_clid = nfs4_init_clientid,
05f4c350 8585 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8586};
8587
591d71cb 8588#if defined(CONFIG_NFS_V4_1)
17280175 8589static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8590 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8591 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8592 .recover_open = nfs4_open_reclaim,
8593 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8594 .establish_clid = nfs41_init_clientid,
fce5c838 8595 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8596 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8597};
8598#endif /* CONFIG_NFS_V4_1 */
8599
17280175 8600static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8601 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8602 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8603 .recover_open = nfs40_open_expired,
591d71cb
AA		 8604 .recover_lock = nfs4_lock_expired,
8605 .establish_clid = nfs4_init_clientid,
8606};
8607
8608#if defined(CONFIG_NFS_V4_1)
17280175 8609static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8610 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8611 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8612 .recover_open = nfs41_open_expired,
8613 .recover_lock = nfs41_lock_expired,
4d643d1d 8614 .establish_clid = nfs41_init_clientid,
1da177e4 8615};
591d71cb 8616#endif /* CONFIG_NFS_V4_1 */
1da177e4 8617
17280175 8618static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8619 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8620 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8621 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8622};
8623
8624#if defined(CONFIG_NFS_V4_1)
17280175 8625static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8626 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8627 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8628 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8629};
8630#endif
8631
ec011fe8 8632static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8633 .get_locations = _nfs40_proc_get_locations,
44c99933 8634 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8635};
8636
8637#if defined(CONFIG_NFS_V4_1)
8638static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8639 .get_locations = _nfs41_proc_get_locations,
44c99933 8640 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8641};
8642#endif /* CONFIG_NFS_V4_1 */
8643
97dc1359
TM		 8644static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8645 .minor_version = 0,
39c6daae
TM		 8646 .init_caps = NFS_CAP_READDIRPLUS
8647 | NFS_CAP_ATOMIC_OPEN
39c6daae 8648 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8649 .init_client = nfs40_init_client,
8650 .shutdown_client = nfs40_shutdown_client,
36281caa 8651 .match_stateid = nfs4_match_stateid,
fca78d6d 8652 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8653 .free_lock_state = nfs4_release_lockowner,
63f5f796 8654 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8655 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8656 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8657 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8658 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8659 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8660};
8661
8662#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8663static struct nfs_seqid *
8664nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8665{
8666 return NULL;
8667}
8668
97dc1359
TM		 8669static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8670 .minor_version = 1,
39c6daae
TM		 8671 .init_caps = NFS_CAP_READDIRPLUS
8672 | NFS_CAP_ATOMIC_OPEN
3b66486c 8673 | NFS_CAP_POSIX_LOCK
49f9a0fa 8674 | NFS_CAP_STATEID_NFSV41
e983120e 8675 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8676 .init_client = nfs41_init_client,
8677 .shutdown_client = nfs41_shutdown_client,
36281caa 8678 .match_stateid = nfs41_match_stateid,
fca78d6d 8679 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8680 .free_lock_state = nfs41_free_lock_state,
63f5f796 8681 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8682 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8683 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8684 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8685 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8686 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8687};
8688#endif
8689
42c2c424
SD		 8690#if defined(CONFIG_NFS_V4_2)
8691static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8692 .minor_version = 2,
7017310a
BS		 8693 .init_caps = NFS_CAP_READDIRPLUS
8694 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8695 | NFS_CAP_POSIX_LOCK
8696 | NFS_CAP_STATEID_NFSV41
e983120e 8697 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8698 | NFS_CAP_ALLOCATE
624bd5b7 8699 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8700 | NFS_CAP_SEEK
8701 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8702 .init_client = nfs41_init_client,
8703 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8704 .match_stateid = nfs41_match_stateid,
8705 .find_root_sec = nfs41_find_root_sec,
7017310a 8706 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8707 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8708 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8709 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8710 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8711 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8712 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8713};
8714#endif
8715
97dc1359
TM		 8716const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8717 [0] = &nfs_v4_0_minor_ops,
8718#if defined(CONFIG_NFS_V4_1)
8719 [1] = &nfs_v4_1_minor_ops,
8720#endif
42c2c424
SD		 8721#if defined(CONFIG_NFS_V4_2)
8722 [2] = &nfs_v4_2_minor_ops,
8723#endif
97dc1359
TM		 8724};
8725
17f26b12 8726static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8727 .create = nfs_create,
8728 .lookup = nfs_lookup,
8729 .atomic_open = nfs_atomic_open,
8730 .link = nfs_link,
8731 .unlink = nfs_unlink,
8732 .symlink = nfs_symlink,
8733 .mkdir = nfs_mkdir,
8734 .rmdir = nfs_rmdir,
8735 .mknod = nfs_mknod,
8736 .rename = nfs_rename,
8737 .permission = nfs_permission,
8738 .getattr = nfs_getattr,
8739 .setattr = nfs_setattr,
8740 .getxattr = generic_getxattr,
8741 .setxattr = generic_setxattr,
8742 .listxattr = generic_listxattr,
8743 .removexattr = generic_removexattr,
8744};
8745
92e1d5be 8746static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8747 .permission = nfs_permission,
8748 .getattr = nfs_getattr,
8749 .setattr = nfs_setattr,
64c2ce8b
AK		 8750 .getxattr = generic_getxattr,
8751 .setxattr = generic_setxattr,
8752 .listxattr = generic_listxattr,
8753 .removexattr = generic_removexattr,
6b3b5496
BF		 8754};
8755
509de811 8756const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8757 .version = 4, /* protocol version */
8758 .dentry_ops = &nfs4_dentry_operations,
8759 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8760 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8761 .file_ops = &nfs4_file_operations,
1da177e4 8762 .getroot = nfs4_proc_get_root,
281cad46 8763 .submount = nfs4_submount,
ff9099f2 8764 .try_mount = nfs4_try_mount,
1da177e4
LT		 8765 .getattr = nfs4_proc_getattr,
8766 .setattr = nfs4_proc_setattr,
8767 .lookup = nfs4_proc_lookup,
8768 .access = nfs4_proc_access,
8769 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8770 .create = nfs4_proc_create,
8771 .remove = nfs4_proc_remove,
8772 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8773 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8774 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8775 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8776 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8777 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8778 .link = nfs4_proc_link,
8779 .symlink = nfs4_proc_symlink,
8780 .mkdir = nfs4_proc_mkdir,
8781 .rmdir = nfs4_proc_remove,
8782 .readdir = nfs4_proc_readdir,
8783 .mknod = nfs4_proc_mknod,
8784 .statfs = nfs4_proc_statfs,
8785 .fsinfo = nfs4_proc_fsinfo,
8786 .pathconf = nfs4_proc_pathconf,
e9326dca 8787 .set_capabilities = nfs4_server_capabilities,
1da177e4 8788 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8789 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8790 .read_setup = nfs4_proc_read_setup,
ec06c096 8791 .read_done = nfs4_read_done,
1da177e4 8792 .write_setup = nfs4_proc_write_setup,
788e7a89 8793 .write_done = nfs4_write_done,
1da177e4 8794 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8795 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8796 .commit_done = nfs4_commit_done,
1da177e4 8797 .lock = nfs4_proc_lock,
e50a1c2e 8798 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8799 .close_context = nfs4_close_context,
2b484297 8800 .open_context = nfs4_atomic_open,
011e2a7f 8801 .have_delegation = nfs4_have_delegation,
57ec14c5 8802 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8803 .alloc_client = nfs4_alloc_client,
45a52a02 8804 .init_client = nfs4_init_client,
cdb7eced 8805 .free_client = nfs4_free_client,
1179acc6
BS		 8806 .create_server = nfs4_create_server,
8807 .clone_server = nfs_clone_server,
1da177e4
LT		 8808};
8809
64c2ce8b
AK		 8810static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8811 .prefix = XATTR_NAME_NFSV4_ACL,
8812 .list = nfs4_xattr_list_nfs4_acl,
8813 .get = nfs4_xattr_get_nfs4_acl,
8814 .set = nfs4_xattr_set_nfs4_acl,
8815};
8816
8817const struct xattr_handler *nfs4_xattr_handlers[] = {
8818 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8819#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8820 &nfs4_xattr_nfs4_label_handler,
8821#endif
64c2ce8b
AK		 8822 NULL
8823};
8824
1da177e4
LT		 8825/*
8826 * Local variables:
8827 * c-basic-offset: 8
8828 * End:
8829 */
Linux 6.x block layer and io_uring tree(s)