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NFS: Add nfs_commit_file()
[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 *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 188 | FATTR4_WORD1_TIME_MODIFY
189 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 190#ifdef CONFIG_NFS_V4_SECURITY_LABEL
191 FATTR4_WORD2_SECURITY_LABEL
192#endif
1da177e4
LT		 193};
194
1549210f
TM		 195static const u32 nfs4_pnfs_open_bitmap[3] = {
196 FATTR4_WORD0_TYPE
197 | FATTR4_WORD0_CHANGE
198 | FATTR4_WORD0_SIZE
199 | FATTR4_WORD0_FSID
200 | FATTR4_WORD0_FILEID,
201 FATTR4_WORD1_MODE
202 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER
204 | FATTR4_WORD1_OWNER_GROUP
205 | FATTR4_WORD1_RAWDEV
206 | FATTR4_WORD1_SPACE_USED
207 | FATTR4_WORD1_TIME_ACCESS
208 | FATTR4_WORD1_TIME_METADATA
209 | FATTR4_WORD1_TIME_MODIFY,
210 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 211#ifdef CONFIG_NFS_V4_SECURITY_LABEL
212 | FATTR4_WORD2_SECURITY_LABEL
213#endif
1549210f
TM		 214};
215
e23008ec
AA		 216static const u32 nfs4_open_noattr_bitmap[3] = {
217 FATTR4_WORD0_TYPE
218 | FATTR4_WORD0_CHANGE
219 | FATTR4_WORD0_FILEID,
220};
221
a09df2ca 222const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 223 FATTR4_WORD0_FILES_AVAIL
224 | FATTR4_WORD0_FILES_FREE
225 | FATTR4_WORD0_FILES_TOTAL,
226 FATTR4_WORD1_SPACE_AVAIL
227 | FATTR4_WORD1_SPACE_FREE
228 | FATTR4_WORD1_SPACE_TOTAL
229};
230
a09df2ca 231const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_MAXLINK
233 | FATTR4_WORD0_MAXNAME,
234 0
235};
236
dae100c2 237const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 238 | FATTR4_WORD0_MAXREAD
239 | FATTR4_WORD0_MAXWRITE
240 | FATTR4_WORD0_LEASE_TIME,
55b6e774 241 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 242 | FATTR4_WORD1_FS_LAYOUT_TYPES,
243 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 244 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 245};
246
a09df2ca 247const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 264};
265
bc4785cd 266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 267 struct nfs4_readdir_arg *readdir)
268{
0dbb4c67 269 __be32 *start, *p;
1da177e4 270
1da177e4 271 if (cookie > 2) {
b7ef1956 272 readdir->cookie = cookie;
1da177e4
LT		 273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
2b86ce2d 289 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 301 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 313 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
2b86ce2d 317 kunmap_atomic(start);
1da177e4
LT		 318}
319
8478eaa1
N		 320static long nfs4_update_delay(long *timeout)
321{
322 long ret;
323 if (!timeout)
324 return NFS4_POLL_RETRY_MAX;
325 if (*timeout <= 0)
326 *timeout = NFS4_POLL_RETRY_MIN;
327 if (*timeout > NFS4_POLL_RETRY_MAX)
328 *timeout = NFS4_POLL_RETRY_MAX;
329 ret = *timeout;
330 *timeout <<= 1;
331 return ret;
332}
333
65de872e
TM		 334static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
335{
336 int res = 0;
337
338 might_sleep();
339
8478eaa1
N		 340 freezable_schedule_timeout_killable_unsafe(
341 nfs4_update_delay(timeout));
65de872e
TM		 342 if (fatal_signal_pending(current))
343 res = -ERESTARTSYS;
65de872e
TM		 344 return res;
345}
346
347/* This is the error handling routine for processes that are allowed
348 * to sleep.
349 */
b3c2aa07
TM		 350static int nfs4_do_handle_exception(struct nfs_server *server,
351 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 352{
353 struct nfs_client *clp = server->nfs_client;
9e33bed5 354 struct nfs4_state *state = exception->state;
3114ea7a 355 struct inode *inode = exception->inode;
65de872e
TM		 356 int ret = errorcode;
357
b3c2aa07
TM		 358 exception->delay = 0;
359 exception->recovering = 0;
65de872e
TM		 360 exception->retry = 0;
361 switch(errorcode) {
362 case 0:
363 return 0;
3114ea7a 364 case -NFS4ERR_OPENMODE:
5ba12443
TM		 365 case -NFS4ERR_DELEG_REVOKED:
366 case -NFS4ERR_ADMIN_REVOKED:
367 case -NFS4ERR_BAD_STATEID:
4816fdad
TM		 368 if (inode && nfs_async_inode_return_delegation(inode,
369 NULL) == 0)
370 goto wait_on_recovery;
3114ea7a
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
3114ea7a 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
8ef2f8d4
CL		 392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
03391693 395#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
9f594791 405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 406 goto wait_on_recovery;
03391693 407#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 408 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
65de872e 416 case -NFS4ERR_DELAY:
2598ed34
TM		 417 nfs_inc_server_stats(server, NFSIOS_DELAY);
418 case -NFS4ERR_GRACE:
b3c2aa07
TM		 419 exception->delay = 1;
420 return 0;
421
a8a4ae3a 422 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 423 case -NFS4ERR_OLD_STATEID:
424 exception->retry = 1;
b064eca2
TM		 425 break;
426 case -NFS4ERR_BADOWNER:
427 /* The following works around a Linux server bug! */
428 case -NFS4ERR_BADNAME:
429 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
430 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
431 exception->retry = 1;
432 printk(KERN_WARNING "NFS: v4 server %s "
433 "does not accept raw "
434 "uid/gids. "
435 "Reenabling the idmapper.\n",
436 server->nfs_client->cl_hostname);
437 }
65de872e
TM		 438 }
439 /* We failed to handle the error */
440 return nfs4_map_errors(ret);
0400a6b0 441wait_on_recovery:
b3c2aa07
TM		 442 exception->recovering = 1;
443 return 0;
444}
445
446/* This is the error handling routine for processes that are allowed
447 * to sleep.
448 */
449int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
450{
451 struct nfs_client *clp = server->nfs_client;
452 int ret;
453
454 ret = nfs4_do_handle_exception(server, errorcode, exception);
455 if (exception->delay) {
456 ret = nfs4_delay(server->client, &exception->timeout);
457 goto out_retry;
458 }
459 if (exception->recovering) {
460 ret = nfs4_wait_clnt_recover(clp);
461 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
462 return -EIO;
463 goto out_retry;
464 }
465 return ret;
466out_retry:
a2c0b9e2
TM		 467 if (ret == 0)
468 exception->retry = 1;
469 return ret;
65de872e
TM		 470}
471
037fc980
TM		 472static int
473nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
474 int errorcode, struct nfs4_exception *exception)
475{
476 struct nfs_client *clp = server->nfs_client;
477 int ret;
478
479 ret = nfs4_do_handle_exception(server, errorcode, exception);
480 if (exception->delay) {
481 rpc_delay(task, nfs4_update_delay(&exception->timeout));
482 goto out_retry;
483 }
484 if (exception->recovering) {
485 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
486 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
487 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
488 goto out_retry;
489 }
519ae255 490 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 491 ret = -EIO;
492 return ret;
493out_retry:
a2c0b9e2
TM		 494 if (ret == 0)
495 exception->retry = 1;
496 return ret;
65de872e
TM		 497}
498
037fc980
TM		 499static int
500nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
501 struct nfs4_state *state, long *timeout)
502{
503 struct nfs4_exception exception = {
504 .state = state,
505 };
506
507 if (task->tk_status >= 0)
508 return 0;
509 if (timeout)
510 exception.timeout = *timeout;
511 task->tk_status = nfs4_async_handle_exception(task, server,
512 task->tk_status,
513 &exception);
514 if (exception.delay && timeout)
515 *timeout = exception.timeout;
516 if (exception.retry)
517 return -EAGAIN;
518 return 0;
519}
520
a5250def
WAA		 521/*
522 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
523 * or 'false' otherwise.
524 */
525static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
526{
527 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
528
529 if (flavor == RPC_AUTH_GSS_KRB5I ||
530 flavor == RPC_AUTH_GSS_KRB5P)
531 return true;
532
533 return false;
534}
65de872e 535
452e9352 536static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 537{
1da177e4
LT		 538 spin_lock(&clp->cl_lock);
539 if (time_before(clp->cl_last_renewal,timestamp))
540 clp->cl_last_renewal = timestamp;
541 spin_unlock(&clp->cl_lock);
542}
543
452e9352
TM		 544static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
545{
be824167
TM		 546 struct nfs_client *clp = server->nfs_client;
547
548 if (!nfs4_has_session(clp))
549 do_renew_lease(clp, timestamp);
452e9352
TM		 550}
551
2a3eb2b9
CL		 552struct nfs4_call_sync_data {
553 const struct nfs_server *seq_server;
554 struct nfs4_sequence_args *seq_args;
555 struct nfs4_sequence_res *seq_res;
556};
557
be3a5d23
TM		 558void nfs4_init_sequence(struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 560{
561 args->sa_slot = NULL;
562 args->sa_cache_this = cache_reply;
563 args->sa_privileged = 0;
564
565 res->sr_slot = NULL;
566}
567
568static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
569{
570 args->sa_privileged = 1;
571}
572
cb04ad2a
PT		 573int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
574 struct nfs4_sequence_args *args,
575 struct nfs4_sequence_res *res,
576 struct rpc_task *task)
3bd2384a 577{
3bd2384a
CL		 578 struct nfs4_slot *slot;
579
580 /* slot already allocated? */
581 if (res->sr_slot != NULL)
582 goto out_start;
583
584 spin_lock(&tbl->slot_tbl_lock);
585 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
586 goto out_sleep;
587
588 slot = nfs4_alloc_slot(tbl);
589 if (IS_ERR(slot)) {
590 if (slot == ERR_PTR(-ENOMEM))
591 task->tk_timeout = HZ >> 2;
592 goto out_sleep;
593 }
594 spin_unlock(&tbl->slot_tbl_lock);
595
596 args->sa_slot = slot;
597 res->sr_slot = slot;
598
599out_start:
600 rpc_call_start(task);
601 return 0;
602
603out_sleep:
604 if (args->sa_privileged)
605 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
606 NULL, RPC_PRIORITY_PRIVILEGED);
607 else
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
609 spin_unlock(&tbl->slot_tbl_lock);
610 return -EAGAIN;
611}
cb04ad2a 612EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 613
614static int nfs40_sequence_done(struct rpc_task *task,
615 struct nfs4_sequence_res *res)
616{
617 struct nfs4_slot *slot = res->sr_slot;
618 struct nfs4_slot_table *tbl;
619
cab92c19 620 if (slot == NULL)
3bd2384a
CL		 621 goto out;
622
623 tbl = slot->table;
624 spin_lock(&tbl->slot_tbl_lock);
625 if (!nfs41_wake_and_assign_slot(tbl, slot))
626 nfs4_free_slot(tbl, slot);
627 spin_unlock(&tbl->slot_tbl_lock);
628
629 res->sr_slot = NULL;
630out:
631 return 1;
632}
633
cccef3b9
AA		 634#if defined(CONFIG_NFS_V4_1)
635
d185a334 636static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 637{
e3725ec0 638 struct nfs4_session *session;
13615871 639 struct nfs4_slot_table *tbl;
a13ce7c6 640 struct nfs4_slot *slot = res->sr_slot;
c10e4498 641 bool send_new_highest_used_slotid = false;
13615871 642
a13ce7c6 643 tbl = slot->table;
e3725ec0 644 session = tbl->session;
ea028ac9 645
35dc1d74 646 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 647 /* Be nice to the server: try to ensure that the last transmitted
648 * value for highest_user_slotid <= target_highest_slotid
649 */
650 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
651 send_new_highest_used_slotid = true;
652
a13ce7c6 653 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 654 send_new_highest_used_slotid = false;
655 goto out_unlock;
656 }
a13ce7c6 657 nfs4_free_slot(tbl, slot);
c10e4498
TM		 658
659 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
660 send_new_highest_used_slotid = false;
b75ad4cd 661out_unlock:
35dc1d74 662 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 663 res->sr_slot = NULL;
c10e4498 664 if (send_new_highest_used_slotid)
3f10a6af 665 nfs41_notify_server(session->clp);
13615871
AA		 666}
667
f9c96fcc 668int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 669{
e3725ec0 670 struct nfs4_session *session;
a13ce7c6 671 struct nfs4_slot *slot = res->sr_slot;
14516c3a 672 struct nfs_client *clp;
ac20d163 673 bool interrupted = false;
85563073 674 int ret = 1;
b0df806c 675
a13ce7c6
TM		 676 if (slot == NULL)
677 goto out_noaction;
468f8613
BS		 678 /* don't increment the sequence number if the task wasn't sent */
679 if (!RPC_WAS_SENT(task))
b0df806c
AA		 680 goto out;
681
e3725ec0 682 session = slot->table->session;
933602e3 683
ac20d163
TM		 684 if (slot->interrupted) {
685 slot->interrupted = 0;
686 interrupted = true;
687 }
688
2f92ae34 689 trace_nfs4_sequence_done(session, res);
691daf3b 690 /* Check the SEQUENCE operation status */
14516c3a
TM		 691 switch (res->sr_status) {
692 case 0:
b0df806c 693 /* Update the slot's sequence and clientid lease timer */
933602e3 694 ++slot->seq_nr;
e3725ec0 695 clp = session->clp;
8e63b6a8 696 do_renew_lease(clp, res->sr_timestamp);
0629e370 697 /* Check sequence flags */
b15c7cdd 698 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 699 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 700 break;
ac20d163
TM		 701 case 1:
702 /*
703 * sr_status remains 1 if an RPC level error occurred.
704 * The server may or may not have processed the sequence
705 * operation..
706 * Mark the slot as having hosted an interrupted RPC call.
707 */
708 slot->interrupted = 1;
709 goto out;
14516c3a
TM		 710 case -NFS4ERR_DELAY:
711 /* The server detected a resend of the RPC call and
712 * returned NFS4ERR_DELAY as per Section 2.10.6.2
713 * of RFC5661.
714 */
df2fabff 715 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 716 __func__,
df2fabff 717 slot->slot_nr,
933602e3 718 slot->seq_nr);
14516c3a 719 goto out_retry;
85563073
TM		 720 case -NFS4ERR_BADSLOT:
721 /*
722 * The slot id we used was probably retired. Try again
723 * using a different slot id.
724 */
e8794440
TM		 725 goto retry_nowait;
726 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 727 /*
728 * Was the last operation on this sequence interrupted?
729 * If so, retry after bumping the sequence number.
730 */
731 if (interrupted) {
732 ++slot->seq_nr;
733 goto retry_nowait;
734 }
e8794440
TM		 735 /*
736 * Could this slot have been previously retired?
737 * If so, then the server may be expecting seq_nr = 1!
738 */
8e63b6a8
TM		 739 if (slot->seq_nr != 1) {
740 slot->seq_nr = 1;
741 goto retry_nowait;
742 }
743 break;
e8794440
TM		 744 case -NFS4ERR_SEQ_FALSE_RETRY:
745 ++slot->seq_nr;
746 goto retry_nowait;
14516c3a
TM		 747 default:
748 /* Just update the slot sequence no. */
933602e3 749 ++slot->seq_nr;
b0df806c
AA		 750 }
751out:
752 /* The session may be reset by one of the error handlers. */
753 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 754 nfs41_sequence_free_slot(res);
a13ce7c6 755out_noaction:
85563073 756 return ret;
e8794440
TM		 757retry_nowait:
758 if (rpc_restart_call_prepare(task)) {
759 task->tk_status = 0;
760 ret = 0;
761 }
762 goto out;
14516c3a 763out_retry:
d05dd4e9 764 if (!rpc_restart_call(task))
14516c3a
TM		 765 goto out;
766 rpc_delay(task, NFS4_POLL_RETRY_MAX);
767 return 0;
b0df806c 768}
f9c96fcc 769EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 770
2c4b131d 771int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 772{
e3725ec0 773 if (res->sr_slot == NULL)
14516c3a 774 return 1;
3bd2384a
CL		 775 if (!res->sr_slot->table->session)
776 return nfs40_sequence_done(task, res);
14516c3a 777 return nfs41_sequence_done(task, res);
df896455 778}
2c4b131d 779EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 780
dc70d7b3 781int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 782 struct nfs4_sequence_args *args,
783 struct nfs4_sequence_res *res,
ce5039c1
AA		 784 struct rpc_task *task)
785{
fbcd4abc
AA		 786 struct nfs4_slot *slot;
787 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 788
789 dprintk("--> %s\n", __func__);
ce5039c1 790 /* slot already allocated? */
dfb4f309 791 if (res->sr_slot != NULL)
d9afbd1b 792 goto out_success;
ce5039c1 793
fbcd4abc
AA		 794 tbl = &session->fc_slot_table;
795
69d206b5
TM		 796 task->tk_timeout = 0;
797
fbcd4abc 798 spin_lock(&tbl->slot_tbl_lock);
774d5f14 799 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 800 !args->sa_privileged) {
0b1c8fc4 801 /* The state manager will wait until the slot table is empty */
0b1c8fc4 802 dprintk("%s session is draining\n", __func__);
7b939a3f 803 goto out_sleep;
689cf5c1
AB		 804 }
805
2dc03b7f 806 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 807 if (IS_ERR(slot)) {
808 /* If out of memory, try again in 1/4 second */
809 if (slot == ERR_PTR(-ENOMEM))
810 task->tk_timeout = HZ >> 2;
fbcd4abc 811 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 812 goto out_sleep;
fbcd4abc
AA		 813 }
814 spin_unlock(&tbl->slot_tbl_lock);
815
2b2fa717 816 args->sa_slot = slot;
fbcd4abc 817
e8d92382 818 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 819 slot->slot_nr, slot->seq_nr);
fbcd4abc 820
dfb4f309 821 res->sr_slot = slot;
8e63b6a8 822 res->sr_timestamp = jiffies;
2a6e26cd 823 res->sr_status_flags = 0;
fbcd4abc
AA		 824 /*
825 * sr_status is only set in decode_sequence, and so will remain
826 * set to 1 if an rpc level failure occurs.
827 */
828 res->sr_status = 1;
2f92ae34 829 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 830out_success:
831 rpc_call_start(task);
ce5039c1 832 return 0;
7b939a3f 833out_sleep:
8fe72bac
TM		 834 /* Privileged tasks are queued with top priority */
835 if (args->sa_privileged)
1e1093c7
TM		 836 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
837 NULL, RPC_PRIORITY_PRIVILEGED);
838 else
839 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 840 spin_unlock(&tbl->slot_tbl_lock);
841 return -EAGAIN;
ce5039c1 842}
dc70d7b3 843EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 844
5a580e0a
CL		 845static int nfs4_setup_sequence(const struct nfs_server *server,
846 struct nfs4_sequence_args *args,
847 struct nfs4_sequence_res *res,
848 struct rpc_task *task)
ce5039c1 849{
035168ab 850 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 851 int ret = 0;
852
3bd2384a 853 if (!session)
cb04ad2a
PT		 854 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
855 args, res, task);
035168ab 856
e8d92382 857 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 858 __func__, session->clp, session, res->sr_slot ?
e8d92382 859 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 860
9d12b216 861 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 862
ce5039c1
AA		 863 dprintk("<-- %s status=%d\n", __func__, ret);
864 return ret;
865}
866
ce5039c1
AA		 867static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
868{
2a3eb2b9 869 struct nfs4_call_sync_data *data = calldata;
6ba7db34 870 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 871
035168ab
TM		 872 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
873
d9afbd1b 874 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 875}
876
69ab40c4
AA		 877static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
878{
2a3eb2b9 879 struct nfs4_call_sync_data *data = calldata;
69ab40c4 880
14516c3a 881 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 882}
883
17280175 884static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 885 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 886 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 887};
888
3bd2384a
CL		 889#else /* !CONFIG_NFS_V4_1 */
890
9915ea7e
CL		 891static int nfs4_setup_sequence(const struct nfs_server *server,
892 struct nfs4_sequence_args *args,
893 struct nfs4_sequence_res *res,
894 struct rpc_task *task)
895{
cb04ad2a
PT		 896 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
897 args, res, task);
9915ea7e
CL		 898}
899
2c4b131d
PT		 900int nfs4_sequence_done(struct rpc_task *task,
901 struct nfs4_sequence_res *res)
9915ea7e 902{
3bd2384a 903 return nfs40_sequence_done(task, res);
9915ea7e 904}
2c4b131d 905EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 906
907#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 908
909static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
910{
911 struct nfs4_call_sync_data *data = calldata;
912 nfs4_setup_sequence(data->seq_server,
913 data->seq_args, data->seq_res, task);
914}
915
916static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
917{
918 struct nfs4_call_sync_data *data = calldata;
919 nfs4_sequence_done(task, data->seq_res);
920}
921
922static const struct rpc_call_ops nfs40_call_sync_ops = {
923 .rpc_call_prepare = nfs40_call_sync_prepare,
924 .rpc_call_done = nfs40_call_sync_done,
925};
926
7c513058
BS		 927static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
928 struct nfs_server *server,
ce5039c1
AA		 929 struct rpc_message *msg,
930 struct nfs4_sequence_args *args,
8fe72bac 931 struct nfs4_sequence_res *res)
ce5039c1
AA		 932{
933 int ret;
934 struct rpc_task *task;
9915ea7e 935 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 936 struct nfs4_call_sync_data data = {
035168ab 937 .seq_server = server,
ce5039c1
AA		 938 .seq_args = args,
939 .seq_res = res,
ce5039c1
AA		 940 };
941 struct rpc_task_setup task_setup = {
7c513058 942 .rpc_client = clnt,
ce5039c1 943 .rpc_message = msg,
9915ea7e 944 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 945 .callback_data = &data
946 };
947
ce5039c1
AA		 948 task = rpc_run_task(&task_setup);
949 if (IS_ERR(task))
950 ret = PTR_ERR(task);
951 else {
952 ret = task->tk_status;
953 rpc_put_task(task);
954 }
955 return ret;
956}
957
7c513058
BS		 958int nfs4_call_sync(struct rpc_clnt *clnt,
959 struct nfs_server *server,
e73b83f2
BS		 960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
962 struct nfs4_sequence_res *res,
963 int cache_reply)
964{
a9c92d6b 965 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 966 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 967}
cccef3b9 968
38478b24 969static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 970{
38478b24 971 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 972
38478b24 973 spin_lock(&dir->i_lock);
359d7d1c 974 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 975 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 976 nfs_force_lookup_revalidate(dir);
a9a4a87a 977 dir->i_version = cinfo->after;
3235b403 978 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 979 nfs_fscache_invalidate(dir);
38478b24 980 spin_unlock(&dir->i_lock);
1da177e4
LT		 981}
982
e56e0b78 983struct nfs4_opendata {
c6d00e63 984 struct kref kref;
e56e0b78
TM		 985 struct nfs_openargs o_arg;
986 struct nfs_openres o_res;
cdd4e68b
TM		 987 struct nfs_open_confirmargs c_arg;
988 struct nfs_open_confirmres c_res;
6926afd1
TM		 989 struct nfs4_string owner_name;
990 struct nfs4_string group_name;
a49c2691 991 struct nfs4_label *a_label;
e56e0b78 992 struct nfs_fattr f_attr;
1775fd3e 993 struct nfs4_label *f_label;
e56e0b78 994 struct dentry *dir;
82a2c1b7 995 struct dentry *dentry;
e56e0b78 996 struct nfs4_state_owner *owner;
aac00a8d 997 struct nfs4_state *state;
e56e0b78 998 struct iattr attrs;
26e976a8 999 unsigned long timestamp;
3e309914 1000 unsigned int rpc_done : 1;
5bc2afc2 1001 unsigned int file_created : 1;
bdeca1b7 1002 unsigned int is_recover : 1;
24ac23ab
TM		 1003 int rpc_status;
1004 int cancelled;
e56e0b78
TM		 1005};
1006
49f9a0fa
TM		 1007static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1008 int err, struct nfs4_exception *exception)
1009{
1010 if (err != -EINVAL)
1011 return false;
1012 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1013 return false;
1014 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1015 exception->retry = 1;
1016 return true;
1017}
1018
6ae37339
TM		 1019static u32
1020nfs4_map_atomic_open_share(struct nfs_server *server,
1021 fmode_t fmode, int openflags)
1022{
1023 u32 res = 0;
1024
1025 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1026 case FMODE_READ:
1027 res = NFS4_SHARE_ACCESS_READ;
1028 break;
1029 case FMODE_WRITE:
1030 res = NFS4_SHARE_ACCESS_WRITE;
1031 break;
1032 case FMODE_READ|FMODE_WRITE:
1033 res = NFS4_SHARE_ACCESS_BOTH;
1034 }
1035 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1036 goto out;
1037 /* Want no delegation if we're using O_DIRECT */
1038 if (openflags & O_DIRECT)
1039 res |= NFS4_SHARE_WANT_NO_DELEG;
1040out:
1041 return res;
1042}
1043
49f9a0fa
TM		 1044static enum open_claim_type4
1045nfs4_map_atomic_open_claim(struct nfs_server *server,
1046 enum open_claim_type4 claim)
1047{
1048 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1049 return claim;
1050 switch (claim) {
1051 default:
1052 return claim;
1053 case NFS4_OPEN_CLAIM_FH:
1054 return NFS4_OPEN_CLAIM_NULL;
1055 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1056 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1057 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1058 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1059 }
1060}
2ced46c2
TM		 1061
1062static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1063{
1064 p->o_res.f_attr = &p->f_attr;
1775fd3e 1065 p->o_res.f_label = p->f_label;
c1d51931
TM		 1066 p->o_res.seqid = p->o_arg.seqid;
1067 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1068 p->o_res.server = p->o_arg.server;
5f657530 1069 p->o_res.access_request = p->o_arg.access;
2ced46c2 1070 nfs_fattr_init(&p->f_attr);
6926afd1 1071 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1072}
1073
82a2c1b7 1074static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1075 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1076 const struct iattr *attrs,
1775fd3e 1077 struct nfs4_label *label,
4a1c0893 1078 enum open_claim_type4 claim,
8535b2be 1079 gfp_t gfp_mask)
e56e0b78 1080{
82a2c1b7 1081 struct dentry *parent = dget_parent(dentry);
2b0143b5 1082 struct inode *dir = d_inode(parent);
e56e0b78 1083 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1084 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1085 struct nfs4_opendata *p;
1086
8535b2be 1087 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1088 if (p == NULL)
1089 goto err;
14c43f76
DQ		 1090
1091 p->f_label = nfs4_label_alloc(server, gfp_mask);
1092 if (IS_ERR(p->f_label))
1093 goto err_free_p;
1094
a49c2691
KM		 1095 p->a_label = nfs4_label_alloc(server, gfp_mask);
1096 if (IS_ERR(p->a_label))
1097 goto err_free_f;
1098
63f5f796
TM		 1099 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1100 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1101 if (IS_ERR(p->o_arg.seqid))
14c43f76 1102 goto err_free_label;
82a2c1b7
AV		 1103 nfs_sb_active(dentry->d_sb);
1104 p->dentry = dget(dentry);
e56e0b78
TM		 1105 p->dir = parent;
1106 p->owner = sp;
1107 atomic_inc(&sp->so_count);
dc0b027d
TM		 1108 p->o_arg.open_flags = flags;
1109 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1110 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1111 fmode, flags);
ae2bb032
WAA		 1112 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1113 * will return permission denied for all bits until close */
1114 if (!(flags & O_EXCL)) {
1115 /* ask server to check for all possible rights as results
1116 * are cached */
1117 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1118 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1119 }
7539bbab 1120 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1121 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1122 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1123 p->o_arg.name = &dentry->d_name;
e56e0b78 1124 p->o_arg.server = server;
aa9c2669 1125 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1126 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1127 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1128 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1129 switch (p->o_arg.claim) {
4a1c0893
TM		 1130 case NFS4_OPEN_CLAIM_NULL:
1131 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1132 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1133 p->o_arg.fh = NFS_FH(dir);
1134 break;
1135 case NFS4_OPEN_CLAIM_PREVIOUS:
1136 case NFS4_OPEN_CLAIM_FH:
1137 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1138 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1139 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1140 }
536e43d1 1141 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1142 __u32 verf[2];
d77d76ff 1143
e56e0b78
TM		 1144 p->o_arg.u.attrs = &p->attrs;
1145 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1146
1147 verf[0] = jiffies;
1148 verf[1] = current->pid;
1149 memcpy(p->o_arg.u.verifier.data, verf,
1150 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1151 }
cdd4e68b
TM		 1152 p->c_arg.fh = &p->o_res.fh;
1153 p->c_arg.stateid = &p->o_res.stateid;
1154 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1155 nfs4_init_opendata_res(p);
c6d00e63 1156 kref_init(&p->kref);
e56e0b78 1157 return p;
14c43f76
DQ		 1158
1159err_free_label:
a49c2691
KM		 1160 nfs4_label_free(p->a_label);
1161err_free_f:
14c43f76
DQ		 1162 nfs4_label_free(p->f_label);
1163err_free_p:
e56e0b78
TM		 1164 kfree(p);
1165err:
1166 dput(parent);
1167 return NULL;
1168}
1169
c6d00e63 1170static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1171{
c6d00e63
TM		 1172 struct nfs4_opendata *p = container_of(kref,
1173 struct nfs4_opendata, kref);
82a2c1b7 1174 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1175
1176 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1177 if (p->state != NULL)
1178 nfs4_put_open_state(p->state);
c6d00e63 1179 nfs4_put_state_owner(p->owner);
14c43f76 1180
a49c2691 1181 nfs4_label_free(p->a_label);
14c43f76
DQ		 1182 nfs4_label_free(p->f_label);
1183
c6d00e63 1184 dput(p->dir);
82a2c1b7
AV		 1185 dput(p->dentry);
1186 nfs_sb_deactive(sb);
6926afd1 1187 nfs_fattr_free_names(&p->f_attr);
e911b815 1188 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1189 kfree(p);
1190}
1191
1192static void nfs4_opendata_put(struct nfs4_opendata *p)
1193{
1194 if (p != NULL)
1195 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1196}
1197
06f814a3
TM		 1198static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1199{
06f814a3
TM		 1200 int ret;
1201
06f814a3 1202 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1203 return ret;
1204}
1205
24311f88
TM		 1206static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1207 fmode_t fmode)
1208{
1209 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1210 case FMODE_READ|FMODE_WRITE:
1211 return state->n_rdwr != 0;
1212 case FMODE_WRITE:
1213 return state->n_wronly != 0;
1214 case FMODE_READ:
1215 return state->n_rdonly != 0;
1216 }
1217 WARN_ON_ONCE(1);
1218 return false;
1219}
1220
dc0b027d 1221static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1222{
1223 int ret = 0;
dc0b027d 1224
536e43d1 1225 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1226 goto out;
1227 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1228 case FMODE_READ:
88069f77
TM		 1229 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1230 && state->n_rdonly != 0;
6ee41268
TM		 1231 break;
1232 case FMODE_WRITE:
88069f77
TM		 1233 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1234 && state->n_wronly != 0;
6ee41268
TM		 1235 break;
1236 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1237 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1238 && state->n_rdwr != 0;
6ee41268 1239 }
dc0b027d 1240out:
6ee41268
TM		 1241 return ret;
1242}
1243
2a606188
TM		 1244static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1245 enum open_claim_type4 claim)
aac00a8d 1246{
652f89f6
TM		 1247 if (delegation == NULL)
1248 return 0;
dc0b027d 1249 if ((delegation->type & fmode) != fmode)
aac00a8d 1250 return 0;
d25be546
TM		 1251 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1252 return 0;
2a606188
TM		 1253 switch (claim) {
1254 case NFS4_OPEN_CLAIM_NULL:
1255 case NFS4_OPEN_CLAIM_FH:
1256 break;
1257 case NFS4_OPEN_CLAIM_PREVIOUS:
1258 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1259 break;
1260 default:
1261 return 0;
1262 }
b7391f44 1263 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1264 return 1;
1265}
1266
dc0b027d 1267static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1268{
dc0b027d 1269 switch (fmode) {
e7616923
TM		 1270 case FMODE_WRITE:
1271 state->n_wronly++;
1272 break;
1273 case FMODE_READ:
1274 state->n_rdonly++;
1275 break;
1276 case FMODE_READ|FMODE_WRITE:
1277 state->n_rdwr++;
1278 }
dc0b027d 1279 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1280}
1281
4f14c194
TM		 1282static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1283{
1284 struct nfs_client *clp = state->owner->so_server->nfs_client;
1285 bool need_recover = false;
1286
1287 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1288 need_recover = true;
1289 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1290 need_recover = true;
1291 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1292 need_recover = true;
1293 if (need_recover)
1294 nfs4_state_mark_reclaim_nograce(clp, state);
1295}
1296
e999e80e
TM		 1297static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1298 nfs4_stateid *stateid)
1299{
1300 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1301 return true;
4f14c194
TM		 1302 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1303 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1304 return true;
4f14c194 1305 }
e999e80e
TM		 1306 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1307 return true;
1308 return false;
1309}
1310
f95549cf
TM		 1311static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1312{
3c38cbe2
TM		 1313 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1314 return;
f95549cf
TM		 1315 if (state->n_wronly)
1316 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1317 if (state->n_rdonly)
1318 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1319 if (state->n_rdwr)
1320 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1321 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1322}
1323
226056c5 1324static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1325 nfs4_stateid *arg_stateid,
226056c5 1326 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1327{
226056c5
TM		 1328 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1329 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1330 case FMODE_WRITE:
1331 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1332 break;
1333 case FMODE_READ:
1334 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1335 break;
1336 case 0:
1337 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1338 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1339 clear_bit(NFS_OPEN_STATE, &state->flags);
1340 }
1341 if (stateid == NULL)
1342 return;
f95549cf 1343 /* Handle races with OPEN */
4a1e2feb
TM		 1344 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1345 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1346 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1347 nfs_resync_open_stateid_locked(state);
226056c5 1348 return;
f95549cf 1349 }
003707c7 1350 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1351 nfs4_stateid_copy(&state->stateid, stateid);
1352 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1353}
1354
4a1e2feb
TM		 1355static void nfs_clear_open_stateid(struct nfs4_state *state,
1356 nfs4_stateid *arg_stateid,
1357 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1358{
1359 write_seqlock(&state->seqlock);
4a1e2feb 1360 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1361 write_sequnlock(&state->seqlock);
4f14c194
TM		 1362 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1363 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1364}
1365
dc0b027d 1366static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1367{
dc0b027d 1368 switch (fmode) {
003707c7
TM		 1369 case FMODE_READ:
1370 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1371 break;
1372 case FMODE_WRITE:
1373 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1374 break;
1375 case FMODE_READ|FMODE_WRITE:
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
1377 }
e999e80e
TM		 1378 if (!nfs_need_update_open_stateid(state, stateid))
1379 return;
1380 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1381 nfs4_stateid_copy(&state->stateid, stateid);
1382 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1383}
1384
dc0b027d 1385static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1386{
8bda4e4c
TM		 1387 /*
1388 * Protect the call to nfs4_state_set_mode_locked and
1389 * serialise the stateid update
1390 */
361cad3c 1391 spin_lock(&state->owner->so_lock);
8bda4e4c 1392 write_seqlock(&state->seqlock);
003707c7 1393 if (deleg_stateid != NULL) {
f597c537 1394 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1395 set_bit(NFS_DELEGATED_STATE, &state->flags);
1396 }
1397 if (open_stateid != NULL)
dc0b027d 1398 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c 1399 write_sequnlock(&state->seqlock);
dc0b027d 1400 update_open_stateflags(state, fmode);
ec073428 1401 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1402}
1403
dc0b027d 1404static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1405{
1406 struct nfs_inode *nfsi = NFS_I(state->inode);
1407 struct nfs_delegation *deleg_cur;
1408 int ret = 0;
1409
dc0b027d 1410 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1411
1412 rcu_read_lock();
1413 deleg_cur = rcu_dereference(nfsi->delegation);
1414 if (deleg_cur == NULL)
1415 goto no_delegation;
1416
1417 spin_lock(&deleg_cur->lock);
17f26b12 1418 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1419 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1420 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1421 goto no_delegation_unlock;
1422
1423 if (delegation == NULL)
1424 delegation = &deleg_cur->stateid;
f597c537 1425 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1426 goto no_delegation_unlock;
1427
b7391f44 1428 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1429 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1430 ret = 1;
1431no_delegation_unlock:
1432 spin_unlock(&deleg_cur->lock);
1433no_delegation:
1434 rcu_read_unlock();
1435
1436 if (!ret && open_stateid != NULL) {
dc0b027d 1437 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1438 ret = 1;
1439 }
4f14c194
TM		 1440 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1441 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1442
1443 return ret;
1444}
1445
39071e6f
TM		 1446static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1447 const nfs4_stateid *stateid)
1448{
1449 struct nfs4_state *state = lsp->ls_state;
1450 bool ret = false;
1451
1452 spin_lock(&state->state_lock);
1453 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1454 goto out_noupdate;
1455 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1456 goto out_noupdate;
1457 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1458 ret = true;
1459out_noupdate:
1460 spin_unlock(&state->state_lock);
1461 return ret;
1462}
34310430 1463
dc0b027d 1464static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1465{
1466 struct nfs_delegation *delegation;
1467
1468 rcu_read_lock();
1469 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1470 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1471 rcu_read_unlock();
1472 return;
1473 }
1474 rcu_read_unlock();
57ec14c5 1475 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1476}
1477
6ee41268 1478static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1479{
1480 struct nfs4_state *state = opendata->state;
1481 struct nfs_inode *nfsi = NFS_I(state->inode);
1482 struct nfs_delegation *delegation;
f448badd 1483 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1484 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1485 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1486 nfs4_stateid stateid;
1487 int ret = -EAGAIN;
1488
aac00a8d 1489 for (;;) {
61beef75 1490 spin_lock(&state->owner->so_lock);
dc0b027d 1491 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1492 update_open_stateflags(state, fmode);
6ee41268 1493 spin_unlock(&state->owner->so_lock);
61beef75 1494 goto out_return_state;
6ee41268 1495 }
61beef75 1496 spin_unlock(&state->owner->so_lock);
34310430
TM		 1497 rcu_read_lock();
1498 delegation = rcu_dereference(nfsi->delegation);
2a606188 1499 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1500 rcu_read_unlock();
aac00a8d 1501 break;
34310430 1502 }
aac00a8d 1503 /* Save the delegation */
f597c537 1504 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1505 rcu_read_unlock();
fa332941 1506 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1507 if (!opendata->is_recover) {
1508 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1509 if (ret != 0)
1510 goto out;
1511 }
aac00a8d 1512 ret = -EAGAIN;
34310430
TM		 1513
1514 /* Try to update the stateid using the delegation */
dc0b027d 1515 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1516 goto out_return_state;
aac00a8d 1517 }
aac00a8d
TM		 1518out:
1519 return ERR_PTR(ret);
1520out_return_state:
1521 atomic_inc(&state->count);
1522 return state;
1523}
1524
e23008ec
AA		 1525static void
1526nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1527{
1528 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1529 struct nfs_delegation *delegation;
1530 int delegation_flags = 0;
1531
1532 rcu_read_lock();
1533 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1534 if (delegation)
1535 delegation_flags = delegation->flags;
1536 rcu_read_unlock();
72d79ff8
TM		 1537 switch (data->o_arg.claim) {
1538 default:
1539 break;
1540 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1541 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1542 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1543 "returning a delegation for "
1544 "OPEN(CLAIM_DELEGATE_CUR)\n",
1545 clp->cl_hostname);
72d79ff8
TM		 1546 return;
1547 }
1548 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1549 nfs_inode_set_delegation(state->inode,
1550 data->owner->so_cred,
1551 &data->o_res);
1552 else
1553 nfs_inode_reclaim_delegation(state->inode,
1554 data->owner->so_cred,
1555 &data->o_res);
1556}
1557
1558/*
1559 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1560 * and update the nfs4_state.
1561 */
1562static struct nfs4_state *
1563_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1564{
1565 struct inode *inode = data->state->inode;
1566 struct nfs4_state *state = data->state;
1567 int ret;
1568
d2bfda2e
WAA		 1569 if (!data->rpc_done) {
1570 if (data->rpc_status) {
1571 ret = data->rpc_status;
1572 goto err;
1573 }
1574 /* cached opens have already been processed */
1575 goto update;
e23008ec
AA		 1576 }
1577
e23008ec
AA		 1578 ret = nfs_refresh_inode(inode, &data->f_attr);
1579 if (ret)
1580 goto err;
1581
1582 if (data->o_res.delegation_type != 0)
1583 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1584update:
e23008ec
AA		 1585 update_open_stateid(state, &data->o_res.stateid, NULL,
1586 data->o_arg.fmode);
d49f042a 1587 atomic_inc(&state->count);
e23008ec
AA		 1588
1589 return state;
1590err:
1591 return ERR_PTR(ret);
1592
1593}
1594
1595static struct nfs4_state *
1596_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1597{
1598 struct inode *inode;
1599 struct nfs4_state *state = NULL;
1b370bc2 1600 int ret;
24ac23ab 1601
aac00a8d 1602 if (!data->rpc_done) {
6ee41268 1603 state = nfs4_try_open_cached(data);
9759b0fb 1604 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1605 goto out;
1606 }
1607
1b370bc2 1608 ret = -EAGAIN;
24ac23ab 1609 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1610 goto err;
1775fd3e 1611 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1612 ret = PTR_ERR(inode);
03f28e3a 1613 if (IS_ERR(inode))
1b370bc2
TM		 1614 goto err;
1615 ret = -ENOMEM;
24ac23ab
TM		 1616 state = nfs4_get_open_state(inode, data->owner);
1617 if (state == NULL)
1b370bc2 1618 goto err_put_inode;
e23008ec
AA		 1619 if (data->o_res.delegation_type != 0)
1620 nfs4_opendata_check_deleg(data, state);
34310430 1621 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1622 data->o_arg.fmode);
24ac23ab 1623 iput(inode);
aac00a8d 1624out:
7aa262b5 1625 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1626 return state;
1b370bc2
TM		 1627err_put_inode:
1628 iput(inode);
1629err:
1630 return ERR_PTR(ret);
24ac23ab
TM		 1631}
1632
e23008ec
AA		 1633static struct nfs4_state *
1634nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1635{
1636 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1637 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1638 return _nfs4_opendata_to_nfs4_state(data);
1639}
1640
864472e9
TM		 1641static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1642{
1643 struct nfs_inode *nfsi = NFS_I(state->inode);
1644 struct nfs_open_context *ctx;
1645
1646 spin_lock(&state->inode->i_lock);
1647 list_for_each_entry(ctx, &nfsi->open_files, list) {
1648 if (ctx->state != state)
1649 continue;
1650 get_nfs_open_context(ctx);
1651 spin_unlock(&state->inode->i_lock);
1652 return ctx;
1653 }
1654 spin_unlock(&state->inode->i_lock);
1655 return ERR_PTR(-ENOENT);
1656}
1657
4a1c0893
TM		 1658static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1659 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1660{
1661 struct nfs4_opendata *opendata;
1662
4a1c0893 1663 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1664 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1665 if (opendata == NULL)
1666 return ERR_PTR(-ENOMEM);
1667 opendata->state = state;
1668 atomic_inc(&state->count);
1669 return opendata;
1670}
1671
24311f88
TM		 1672static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1673 fmode_t fmode)
864472e9 1674{
2ced46c2 1675 struct nfs4_state *newstate;
864472e9
TM		 1676 int ret;
1677
24311f88 1678 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1679 return 0;
dc0b027d
TM		 1680 opendata->o_arg.open_flags = 0;
1681 opendata->o_arg.fmode = fmode;
be36e185
TM		 1682 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1683 NFS_SB(opendata->dentry->d_sb),
1684 fmode, 0);
2ced46c2
TM		 1685 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1686 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1687 nfs4_init_opendata_res(opendata);
b257957e 1688 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1689 if (ret != 0)
1690 return ret;
2ced46c2 1691 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1692 if (IS_ERR(newstate))
1693 return PTR_ERR(newstate);
24311f88
TM		 1694 if (newstate != opendata->state)
1695 ret = -ESTALE;
643168c2 1696 nfs4_close_state(newstate, fmode);
24311f88 1697 return ret;
864472e9
TM		 1698}
1699
1700static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1701{
864472e9
TM		 1702 int ret;
1703
4f14c194
TM		 1704 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1705 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1706 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1707 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1708 /* memory barrier prior to reading state->n_* */
2ced46c2 1709 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1710 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1711 smp_rmb();
24311f88
TM		 1712 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1713 if (ret != 0)
1714 return ret;
1715 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1716 if (ret != 0)
1717 return ret;
1718 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1719 if (ret != 0)
1720 return ret;
1ac7e2fd
TM		 1721 /*
1722 * We may have performed cached opens for all three recoveries.
1723 * Check if we need to update the current stateid.
1724 */
1725 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1726 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1727 write_seqlock(&state->seqlock);
1ac7e2fd 1728 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1729 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1730 write_sequnlock(&state->seqlock);
1ac7e2fd 1731 }
864472e9
TM		 1732 return 0;
1733}
1734
1da177e4
LT		 1735/*
1736 * OPEN_RECLAIM:
1737 * reclaim state on the server after a reboot.
1da177e4 1738 */
539cd03a 1739static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1740{
1ac7e2fd 1741 struct nfs_delegation *delegation;
864472e9 1742 struct nfs4_opendata *opendata;
dc0b027d 1743 fmode_t delegation_type = 0;
1da177e4
LT		 1744 int status;
1745
4a1c0893
TM		 1746 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1747 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1748 if (IS_ERR(opendata))
1749 return PTR_ERR(opendata);
1ac7e2fd
TM		 1750 rcu_read_lock();
1751 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1752 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1753 delegation_type = delegation->type;
1ac7e2fd 1754 rcu_read_unlock();
864472e9
TM		 1755 opendata->o_arg.u.delegation_type = delegation_type;
1756 status = nfs4_open_recover(opendata, state);
c6d00e63 1757 nfs4_opendata_put(opendata);
1da177e4
LT		 1758 return status;
1759}
1760
539cd03a 1761static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1762{
1763 struct nfs_server *server = NFS_SERVER(state->inode);
1764 struct nfs4_exception exception = { };
1765 int err;
1766 do {
539cd03a 1767 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1768 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1769 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1770 continue;
168667c4 1771 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1772 break;
1773 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1774 } while (exception.retry);
1775 return err;
1776}
1777
864472e9
TM		 1778static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1779{
1780 struct nfs_open_context *ctx;
1781 int ret;
1782
1783 ctx = nfs4_state_find_open_context(state);
1784 if (IS_ERR(ctx))
91876b13 1785 return -EAGAIN;
539cd03a 1786 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1787 put_nfs_open_context(ctx);
1788 return ret;
1789}
1790
db4f2e63 1791static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1792{
be76b5b6
TM		 1793 switch (err) {
1794 default:
1795 printk(KERN_ERR "NFS: %s: unhandled error "
1796 "%d.\n", __func__, err);
1797 case 0:
1798 case -ENOENT:
8eee52af 1799 case -EAGAIN:
be76b5b6
TM		 1800 case -ESTALE:
1801 break;
1802 case -NFS4ERR_BADSESSION:
1803 case -NFS4ERR_BADSLOT:
1804 case -NFS4ERR_BAD_HIGH_SLOT:
1805 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1806 case -NFS4ERR_DEADSESSION:
1807 set_bit(NFS_DELEGATED_STATE, &state->flags);
1808 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1809 return -EAGAIN;
1810 case -NFS4ERR_STALE_CLIENTID:
1811 case -NFS4ERR_STALE_STATEID:
1812 set_bit(NFS_DELEGATED_STATE, &state->flags);
1813 case -NFS4ERR_EXPIRED:
1814 /* Don't recall a delegation if it was lost */
1815 nfs4_schedule_lease_recovery(server->nfs_client);
1816 return -EAGAIN;
352297b9
CL		 1817 case -NFS4ERR_MOVED:
1818 nfs4_schedule_migration_recovery(server);
1819 return -EAGAIN;
8ef2f8d4
CL		 1820 case -NFS4ERR_LEASE_MOVED:
1821 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1822 return -EAGAIN;
be76b5b6
TM		 1823 case -NFS4ERR_DELEG_REVOKED:
1824 case -NFS4ERR_ADMIN_REVOKED:
1825 case -NFS4ERR_BAD_STATEID:
db4f2e63 1826 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1827 nfs_inode_find_state_and_recover(state->inode,
1828 stateid);
1829 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1830 return -EAGAIN;
be76b5b6
TM		 1831 case -NFS4ERR_DELAY:
1832 case -NFS4ERR_GRACE:
1833 set_bit(NFS_DELEGATED_STATE, &state->flags);
1834 ssleep(1);
1835 return -EAGAIN;
db4f2e63
TM		 1836 case -ENOMEM:
1837 case -NFS4ERR_DENIED:
1838 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1839 return 0;
be76b5b6 1840 }
1da177e4
LT		 1841 return err;
1842}
1843
24311f88
TM		 1844int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1845 struct nfs4_state *state, const nfs4_stateid *stateid,
1846 fmode_t type)
db4f2e63
TM		 1847{
1848 struct nfs_server *server = NFS_SERVER(state->inode);
1849 struct nfs4_opendata *opendata;
24311f88 1850 int err = 0;
db4f2e63
TM		 1851
1852 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1853 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1854 if (IS_ERR(opendata))
1855 return PTR_ERR(opendata);
1856 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1857 write_seqlock(&state->seqlock);
1858 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1859 write_sequnlock(&state->seqlock);
24311f88
TM		 1860 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1861 switch (type & (FMODE_READ|FMODE_WRITE)) {
1862 case FMODE_READ|FMODE_WRITE:
1863 case FMODE_WRITE:
1864 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1865 if (err)
1866 break;
1867 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1868 if (err)
1869 break;
1870 case FMODE_READ:
1871 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1872 }
db4f2e63
TM		 1873 nfs4_opendata_put(opendata);
1874 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1875}
1876
be05c860
CL		 1877static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1878{
1879 struct nfs4_opendata *data = calldata;
1880
cb04ad2a
PT		 1881 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1882 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1883}
1884
cdd4e68b
TM		 1885static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1886{
1887 struct nfs4_opendata *data = calldata;
1888
17ead6c8 1889 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1890
cdd4e68b 1891 data->rpc_status = task->tk_status;
26e976a8 1892 if (data->rpc_status == 0) {
f597c537 1893 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1894 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1895 renew_lease(data->o_res.server, data->timestamp);
3e309914 1896 data->rpc_done = 1;
26e976a8 1897 }
cdd4e68b
TM		 1898}
1899
1900static void nfs4_open_confirm_release(void *calldata)
1901{
1902 struct nfs4_opendata *data = calldata;
1903 struct nfs4_state *state = NULL;
1904
1905 /* If this request hasn't been cancelled, do nothing */
1906 if (data->cancelled == 0)
1907 goto out_free;
1908 /* In case of error, no cleanup! */
3e309914 1909 if (!data->rpc_done)
cdd4e68b 1910 goto out_free;
cdd4e68b 1911 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1912 if (!IS_ERR(state))
643168c2 1913 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1914out_free:
c6d00e63 1915 nfs4_opendata_put(data);
cdd4e68b
TM		 1916}
1917
1918static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1919 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1920 .rpc_call_done = nfs4_open_confirm_done,
1921 .rpc_release = nfs4_open_confirm_release,
1922};
1923
1924/*
1925 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1926 */
1927static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1928{
2b0143b5 1929 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1930 struct rpc_task *task;
5138fde0
TM		 1931 struct rpc_message msg = {
1932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1933 .rpc_argp = &data->c_arg,
1934 .rpc_resp = &data->c_res,
1935 .rpc_cred = data->owner->so_cred,
1936 };
c970aa85
TM		 1937 struct rpc_task_setup task_setup_data = {
1938 .rpc_client = server->client,
5138fde0 1939 .rpc_message = &msg,
c970aa85
TM		 1940 .callback_ops = &nfs4_open_confirm_ops,
1941 .callback_data = data,
101070ca 1942 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1943 .flags = RPC_TASK_ASYNC,
1944 };
1da177e4
LT		 1945 int status;
1946
17ead6c8 1947 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1948 kref_get(&data->kref);
3e309914
TM		 1949 data->rpc_done = 0;
1950 data->rpc_status = 0;
5138fde0 1951 data->timestamp = jiffies;
e92c1e0d
BC		 1952 if (data->is_recover)
1953 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1954 task = rpc_run_task(&task_setup_data);
7a1218a2 1955 if (IS_ERR(task))
cdd4e68b 1956 return PTR_ERR(task);
cdd4e68b
TM		 1957 status = nfs4_wait_for_completion_rpc_task(task);
1958 if (status != 0) {
1959 data->cancelled = 1;
1960 smp_wmb();
1961 } else
1962 status = data->rpc_status;
e6b3c4db 1963 rpc_put_task(task);
1da177e4
LT		 1964 return status;
1965}
1966
24ac23ab 1967static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1968{
24ac23ab
TM		 1969 struct nfs4_opendata *data = calldata;
1970 struct nfs4_state_owner *sp = data->owner;
549b19cc 1971 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1972 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1973
24ac23ab 1974 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1975 goto out_wait;
aac00a8d
TM		 1976 /*
1977 * Check if we still need to send an OPEN call, or if we can use
1978 * a delegation instead.
1979 */
1980 if (data->state != NULL) {
1981 struct nfs_delegation *delegation;
1982
dc0b027d 1983 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1984 goto out_no_action;
aac00a8d
TM		 1985 rcu_read_lock();
1986 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1987 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1988 goto unlock_no_action;
aac00a8d
TM		 1989 rcu_read_unlock();
1990 }
95b72eb0 1991 /* Update client id. */
549b19cc 1992 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1993 switch (claim) {
1994 default:
1995 break;
8188df17
TM		 1996 case NFS4_OPEN_CLAIM_PREVIOUS:
1997 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1998 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1999 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2000 case NFS4_OPEN_CLAIM_FH:
2001 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2002 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2003 }
26e976a8 2004 data->timestamp = jiffies;
035168ab 2005 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2006 &data->o_arg.seq_args,
2240a9e2
TM		 2007 &data->o_res.seq_res,
2008 task) != 0)
2009 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2010
2011 /* Set the create mode (note dependency on the session type) */
2012 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2013 if (data->o_arg.open_flags & O_EXCL) {
2014 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2015 if (nfs4_has_persistent_session(clp))
2016 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2017 else if (clp->cl_mvops->minor_version > 0)
2018 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2019 }
6ee41268 2020 return;
652f89f6 2021unlock_no_action:
9759b0fb 2022 trace_nfs4_cached_open(data->state);
652f89f6 2023 rcu_read_unlock();
6ee41268
TM		 2024out_no_action:
2025 task->tk_action = NULL;
c8da19b9 2026out_wait:
b75ad4cd 2027 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2028}
2029
24ac23ab
TM		 2030static void nfs4_open_done(struct rpc_task *task, void *calldata)
2031{
2032 struct nfs4_opendata *data = calldata;
1da177e4 2033
24ac23ab 2034 data->rpc_status = task->tk_status;
d898528c 2035
14516c3a
TM		 2036 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2037 return;
d898528c 2038
24ac23ab 2039 if (task->tk_status == 0) {
807d66d8
TM		 2040 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2041 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2042 case S_IFREG:
2043 break;
2044 case S_IFLNK:
24ac23ab 2045 data->rpc_status = -ELOOP;
6f926b5b
TM		 2046 break;
2047 case S_IFDIR:
24ac23ab 2048 data->rpc_status = -EISDIR;
6f926b5b
TM		 2049 break;
2050 default:
24ac23ab 2051 data->rpc_status = -ENOTDIR;
807d66d8 2052 }
6f926b5b 2053 }
26e976a8 2054 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2055 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2056 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2057 }
3e309914 2058 data->rpc_done = 1;
24ac23ab 2059}
6f926b5b 2060
24ac23ab
TM		 2061static void nfs4_open_release(void *calldata)
2062{
2063 struct nfs4_opendata *data = calldata;
2064 struct nfs4_state *state = NULL;
2065
2066 /* If this request hasn't been cancelled, do nothing */
2067 if (data->cancelled == 0)
2068 goto out_free;
2069 /* In case of error, no cleanup! */
3e309914 2070 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2071 goto out_free;
2072 /* In case we need an open_confirm, no cleanup! */
2073 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2074 goto out_free;
24ac23ab 2075 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2076 if (!IS_ERR(state))
643168c2 2077 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2078out_free:
c6d00e63 2079 nfs4_opendata_put(data);
24ac23ab
TM		 2080}
2081
2082static const struct rpc_call_ops nfs4_open_ops = {
2083 .rpc_call_prepare = nfs4_open_prepare,
2084 .rpc_call_done = nfs4_open_done,
2085 .rpc_release = nfs4_open_release,
2086};
2087
b257957e 2088static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2089{
2b0143b5 2090 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2091 struct nfs_server *server = NFS_SERVER(dir);
2092 struct nfs_openargs *o_arg = &data->o_arg;
2093 struct nfs_openres *o_res = &data->o_res;
2094 struct rpc_task *task;
5138fde0
TM		 2095 struct rpc_message msg = {
2096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2097 .rpc_argp = o_arg,
2098 .rpc_resp = o_res,
2099 .rpc_cred = data->owner->so_cred,
2100 };
c970aa85
TM		 2101 struct rpc_task_setup task_setup_data = {
2102 .rpc_client = server->client,
5138fde0 2103 .rpc_message = &msg,
c970aa85
TM		 2104 .callback_ops = &nfs4_open_ops,
2105 .callback_data = data,
101070ca 2106 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2107 .flags = RPC_TASK_ASYNC,
2108 };
24ac23ab
TM		 2109 int status;
2110
a9c92d6b 2111 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2112 kref_get(&data->kref);
3e309914
TM		 2113 data->rpc_done = 0;
2114 data->rpc_status = 0;
2ced46c2 2115 data->cancelled = 0;
bdeca1b7
TM		 2116 data->is_recover = 0;
2117 if (isrecover) {
8fe72bac 2118 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2119 data->is_recover = 1;
2120 }
c970aa85 2121 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2122 if (IS_ERR(task))
2123 return PTR_ERR(task);
2124 status = nfs4_wait_for_completion_rpc_task(task);
2125 if (status != 0) {
2126 data->cancelled = 1;
2127 smp_wmb();
2128 } else
2129 status = data->rpc_status;
2130 rpc_put_task(task);
2131
2132 return status;
2133}
2134
2135static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2136{
2b0143b5 2137 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2138 struct nfs_openres *o_res = &data->o_res;
2139 int status;
2140
2141 status = nfs4_run_open_task(data, 1);
2142 if (status != 0 || !data->rpc_done)
2143 return status;
2144
6926afd1
TM		 2145 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2146
b257957e
AB		 2147 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2148 status = _nfs4_proc_open_confirm(data);
2149 if (status != 0)
2150 return status;
2151 }
2152
2153 return status;
2154}
2155
f3792d63
TM		 2156/*
2157 * Additional permission checks in order to distinguish between an
2158 * open for read, and an open for execute. This works around the
2159 * fact that NFSv4 OPEN treats read and execute permissions as being
2160 * the same.
2161 * Note that in the non-execute case, we want to turn off permission
2162 * checking if we just created a new file (POSIX open() semantics).
2163 */
6168f62c
WAA		 2164static int nfs4_opendata_access(struct rpc_cred *cred,
2165 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2166 struct nfs4_state *state, fmode_t fmode,
2167 int openflags)
6168f62c
WAA		 2168{
2169 struct nfs_access_entry cache;
2170 u32 mask;
2171
2172 /* access call failed or for some reason the server doesn't
2173 * support any access modes -- defer access call until later */
2174 if (opendata->o_res.access_supported == 0)
2175 return 0;
2176
2177 mask = 0;
f3792d63
TM		 2178 /*
2179 * Use openflags to check for exec, because fmode won't
2180 * always have FMODE_EXEC set when file open for exec.
2181 */
f8d9a897
WAA		 2182 if (openflags & __FMODE_EXEC) {
2183 /* ONLY check for exec rights */
2184 mask = MAY_EXEC;
f3792d63 2185 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2186 mask = MAY_READ;
6168f62c
WAA		 2187
2188 cache.cred = cred;
2189 cache.jiffies = jiffies;
2190 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2191 nfs_access_add_cache(state->inode, &cache);
2192
bbd3a8ee 2193 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2194 return 0;
2195
2196 /* even though OPEN succeeded, access is denied. Close the file */
2197 nfs4_close_state(state, fmode);
998f40b5 2198 return -EACCES;
6168f62c
WAA		 2199}
2200
b257957e
AB		 2201/*
2202 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2203 */
2204static int _nfs4_proc_open(struct nfs4_opendata *data)
2205{
2b0143b5 2206 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2207 struct nfs_server *server = NFS_SERVER(dir);
2208 struct nfs_openargs *o_arg = &data->o_arg;
2209 struct nfs_openres *o_res = &data->o_res;
2210 int status;
2211
2212 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2213 if (!data->rpc_done)
2214 return status;
2215 if (status != 0) {
2216 if (status == -NFS4ERR_BADNAME &&
2217 !(o_arg->open_flags & O_CREAT))
2218 return -ENOENT;
24ac23ab 2219 return status;
08ef7bd3 2220 }
24ac23ab 2221
6926afd1
TM		 2222 nfs_fattr_map_and_free_names(server, &data->f_attr);
2223
5bc2afc2 2224 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2225 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2226 if (o_arg->open_flags & O_EXCL)
2227 data->file_created = 1;
2228 else if (o_res->cinfo.before != o_res->cinfo.after)
2229 data->file_created = 1;
2230 }
0df5dd4a
TM		 2231 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2232 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2233 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2234 status = _nfs4_proc_open_confirm(data);
1da177e4 2235 if (status != 0)
24ac23ab 2236 return status;
1da177e4
LT		 2237 }
2238 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2239 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2240 return 0;
1da177e4
LT		 2241}
2242
d83217c1
AA		 2243static int nfs4_recover_expired_lease(struct nfs_server *server)
2244{
2245 return nfs4_client_recover_expired_lease(server->nfs_client);
2246}
2247
1da177e4
LT		 2248/*
2249 * OPEN_EXPIRED:
2250 * reclaim state on the server after a network partition.
2251 * Assumes caller holds the appropriate lock
2252 */
539cd03a 2253static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2254{
e56e0b78 2255 struct nfs4_opendata *opendata;
864472e9 2256 int ret;
1da177e4 2257
4a1c0893 2258 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2259 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2260 if (IS_ERR(opendata))
2261 return PTR_ERR(opendata);
864472e9 2262 ret = nfs4_open_recover(opendata, state);
35d05778 2263 if (ret == -ESTALE)
3d4ff43d 2264 d_drop(ctx->dentry);
c6d00e63 2265 nfs4_opendata_put(opendata);
864472e9 2266 return ret;
1da177e4
LT		 2267}
2268
a9ed2e25 2269static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2270{
539cd03a 2271 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2272 struct nfs4_exception exception = { };
2273 int err;
2274
2275 do {
539cd03a 2276 err = _nfs4_open_expired(ctx, state);
42113a75 2277 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2278 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2279 continue;
a9ed2e25
TM		 2280 switch (err) {
2281 default:
2282 goto out;
2283 case -NFS4ERR_GRACE:
2284 case -NFS4ERR_DELAY:
2285 nfs4_handle_exception(server, err, &exception);
2286 err = 0;
2287 }
202b50dc 2288 } while (exception.retry);
a9ed2e25 2289out:
202b50dc
TM		 2290 return err;
2291}
2292
1da177e4
LT		 2293static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2294{
1da177e4 2295 struct nfs_open_context *ctx;
864472e9 2296 int ret;
1da177e4 2297
864472e9
TM		 2298 ctx = nfs4_state_find_open_context(state);
2299 if (IS_ERR(ctx))
91876b13 2300 return -EAGAIN;
539cd03a 2301 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2302 put_nfs_open_context(ctx);
2303 return ret;
1da177e4
LT		 2304}
2305
4dfd4f7a
TM		 2306static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2307{
2308 nfs_remove_bad_delegation(state->inode);
2309 write_seqlock(&state->seqlock);
2310 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2311 write_sequnlock(&state->seqlock);
2312 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2313}
2314
2315static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2316{
2317 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2318 nfs_finish_clear_delegation_stateid(state);
2319}
2320
2321static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2322{
2323 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2324 nfs40_clear_delegation_stateid(state);
2325 return nfs4_open_expired(sp, state);
2326}
2327
f062eb6c 2328#if defined(CONFIG_NFS_V4_1)
0c116cad 2329static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2330{
f062eb6c 2331 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2332 nfs4_stateid stateid;
ab7cb0df 2333 struct nfs_delegation *delegation;
0c116cad
TM		 2334 struct rpc_cred *cred;
2335 int status;
3e60ffdd 2336
ab7cb0df
TM		 2337 /* Get the delegation credential for use by test/free_stateid */
2338 rcu_read_lock();
2339 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2340 if (delegation == NULL) {
ab7cb0df 2341 rcu_read_unlock();
0c116cad
TM		 2342 return;
2343 }
2344
2345 nfs4_stateid_copy(&stateid, &delegation->stateid);
2346 cred = get_rpccred(delegation->cred);
2347 rcu_read_unlock();
2348 status = nfs41_test_stateid(server, &stateid, cred);
2349 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2350
3e60ffdd
CL		 2351 if (status != NFS_OK) {
2352 /* Free the stateid unless the server explicitly
2353 * informs us the stateid is unrecognized. */
2354 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2355 nfs41_free_stateid(server, &stateid, cred);
2356 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2357 }
ab7cb0df 2358
0c116cad 2359 put_rpccred(cred);
3e60ffdd
CL		 2360}
2361
2362/**
2363 * nfs41_check_open_stateid - possibly free an open stateid
2364 *
2365 * @state: NFSv4 state for an inode
2366 *
2367 * Returns NFS_OK if recovery for this stateid is now finished.
2368 * Otherwise a negative NFS4ERR value is returned.
2369 */
2370static int nfs41_check_open_stateid(struct nfs4_state *state)
2371{
2372 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2373 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2374 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2375 int status;
2376
2377 /* If a state reset has been done, test_stateid is unneeded */
2378 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2379 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2380 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2381 return -NFS4ERR_BAD_STATEID;
2382
ab7cb0df 2383 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2384 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2385 if (status != NFS_OK) {
2386 /* Free the stateid unless the server explicitly
2387 * informs us the stateid is unrecognized. */
2388 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2389 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2390
2391 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2392 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2393 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2394 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2395 }
2396 return status;
2397}
2398
2399static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2400{
eb64cf96 2401 int status;
b01dd1d8 2402
0c116cad 2403 nfs41_check_delegation_stateid(state);
3e60ffdd 2404 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2405 if (status != NFS_OK)
2406 status = nfs4_open_expired(sp, state);
2407 return status;
f062eb6c
BS		 2408}
2409#endif
2410
aa53ed54
JL		 2411/*
2412 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2413 * fields corresponding to attributes that were used to store the verifier.
2414 * Make sure we clobber those fields in the later setattr call
2415 */
5334c5bd
KM		 2416static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2417 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2418{
5334c5bd
KM		 2419 const u32 *attrset = opendata->o_res.attrset;
2420
2421 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2422 !(sattr->ia_valid & ATTR_ATIME_SET))
2423 sattr->ia_valid |= ATTR_ATIME;
2424
5334c5bd 2425 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2426 !(sattr->ia_valid & ATTR_MTIME_SET))
2427 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2428
2429 /* Except MODE, it seems harmless of setting twice. */
2430 if ((attrset[1] & FATTR4_WORD1_MODE))
2431 sattr->ia_valid &= ~ATTR_MODE;
2432
2433 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2434 *label = NULL;
aa53ed54
JL		 2435}
2436
c21443c2
TM		 2437static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2438 fmode_t fmode,
2439 int flags,
3efb9722 2440 struct nfs_open_context *ctx)
c21443c2
TM		 2441{
2442 struct nfs4_state_owner *sp = opendata->owner;
2443 struct nfs_server *server = sp->so_server;
275bb307 2444 struct dentry *dentry;
c21443c2
TM		 2445 struct nfs4_state *state;
2446 unsigned int seq;
2447 int ret;
2448
2449 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2450
2451 ret = _nfs4_proc_open(opendata);
dca78001 2452 if (ret != 0)
c21443c2
TM		 2453 goto out;
2454
2455 state = nfs4_opendata_to_nfs4_state(opendata);
2456 ret = PTR_ERR(state);
2457 if (IS_ERR(state))
2458 goto out;
2459 if (server->caps & NFS_CAP_POSIX_LOCK)
2460 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2461
275bb307 2462 dentry = opendata->dentry;
2b0143b5 2463 if (d_really_is_negative(dentry)) {
668d0cd5 2464 struct dentry *alias;
275bb307 2465 d_drop(dentry);
668d0cd5
AV		 2466 alias = d_exact_alias(dentry, state->inode);
2467 if (!alias)
2468 alias = d_splice_alias(igrab(state->inode), dentry);
2469 /* d_splice_alias() can't fail here - it's a non-directory */
2470 if (alias) {
275bb307 2471 dput(ctx->dentry);
668d0cd5 2472 ctx->dentry = dentry = alias;
275bb307
TM		 2473 }
2474 nfs_set_verifier(dentry,
2b0143b5 2475 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2476 }
2477
c21443c2
TM		 2478 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2479 if (ret != 0)
2480 goto out;
2481
3efb9722 2482 ctx->state = state;
2b0143b5 2483 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2484 nfs_inode_attach_open_context(ctx);
2485 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2486 nfs4_schedule_stateid_recovery(server, state);
2487 }
c21443c2
TM		 2488out:
2489 return ret;
2490}
2491
1da177e4 2492/*
24ac23ab 2493 * Returns a referenced nfs4_state
1da177e4 2494 */
82be417a 2495static int _nfs4_do_open(struct inode *dir,
4197a055 2496 struct nfs_open_context *ctx,
82be417a
AA		 2497 int flags,
2498 struct iattr *sattr,
5bc2afc2
TM		 2499 struct nfs4_label *label,
2500 int *opened)
1da177e4
LT		 2501{
2502 struct nfs4_state_owner *sp;
2503 struct nfs4_state *state = NULL;
2504 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2505 struct nfs4_opendata *opendata;
4197a055
TM		 2506 struct dentry *dentry = ctx->dentry;
2507 struct rpc_cred *cred = ctx->cred;
2508 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2509 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2510 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2511 struct nfs4_label *olabel = NULL;
aac00a8d 2512 int status;
1da177e4
LT		 2513
2514 /* Protect against reboot recovery conflicts */
1da177e4 2515 status = -ENOMEM;
d1e284d5
TM		 2516 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2517 if (sp == NULL) {
1da177e4
LT		 2518 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2519 goto out_err;
2520 }
58d9714a
TM		 2521 status = nfs4_recover_expired_lease(server);
2522 if (status != 0)
b4454fe1 2523 goto err_put_state_owner;
2b0143b5
DH		 2524 if (d_really_is_positive(dentry))
2525 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2526 status = -ENOMEM;
2b0143b5 2527 if (d_really_is_positive(dentry))
49f9a0fa 2528 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2529 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2530 label, claim, GFP_KERNEL);
e56e0b78 2531 if (opendata == NULL)
95d35cb4 2532 goto err_put_state_owner;
1da177e4 2533
14c43f76
DQ		 2534 if (label) {
2535 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2536 if (IS_ERR(olabel)) {
2537 status = PTR_ERR(olabel);
2538 goto err_opendata_put;
2539 }
2540 }
2541
e911b815
TM		 2542 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2543 if (!opendata->f_attr.mdsthreshold) {
2544 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2545 if (!opendata->f_attr.mdsthreshold)
2546 goto err_free_label;
2547 }
1549210f 2548 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2549 }
2b0143b5
DH		 2550 if (d_really_is_positive(dentry))
2551 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2552
3efb9722 2553 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2554 if (status != 0)
14c43f76 2555 goto err_free_label;
3efb9722 2556 state = ctx->state;
6168f62c 2557
efcbc04e 2558 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2559 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2560 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2561
2562 nfs_fattr_init(opendata->o_res.f_attr);
2563 status = nfs4_do_setattr(state->inode, cred,
2564 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2565 state, label, olabel);
2566 if (status == 0) {
f044636d
TM		 2567 nfs_setattr_update_inode(state->inode, sattr,
2568 opendata->o_res.f_attr);
aa9c2669 2569 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2570 }
0ab64e0e 2571 }
c5c3fb5f 2572 if (opened && opendata->file_created)
5bc2afc2 2573 *opened |= FILE_CREATED;
82be417a 2574
e911b815 2575 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2576 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2577 opendata->f_attr.mdsthreshold = NULL;
2578 }
82be417a 2579
14c43f76
DQ		 2580 nfs4_label_free(olabel);
2581
c6d00e63 2582 nfs4_opendata_put(opendata);
1da177e4 2583 nfs4_put_state_owner(sp);
1da177e4 2584 return 0;
14c43f76
DQ		 2585err_free_label:
2586 nfs4_label_free(olabel);
c6d00e63
TM		 2587err_opendata_put:
2588 nfs4_opendata_put(opendata);
e56e0b78
TM		 2589err_put_state_owner:
2590 nfs4_put_state_owner(sp);
1da177e4 2591out_err:
1da177e4
LT		 2592 return status;
2593}
2594
2595
82be417a 2596static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2597 struct nfs_open_context *ctx,
82be417a
AA		 2598 int flags,
2599 struct iattr *sattr,
5bc2afc2
TM		 2600 struct nfs4_label *label,
2601 int *opened)
1da177e4 2602{
49f9a0fa 2603 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2604 struct nfs4_exception exception = { };
2605 struct nfs4_state *res;
2606 int status;
2607
2608 do {
5bc2afc2 2609 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2610 res = ctx->state;
42113a75 2611 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2612 if (status == 0)
2613 break;
2614 /* NOTE: BAD_SEQID means the server and client disagree about the
2615 * book-keeping w.r.t. state-changing operations
2616 * (OPEN/CLOSE/LOCK/LOCKU...)
2617 * It is actually a sign of a bug on the client or on the server.
2618 *
2619 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2620 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2621 * have unhashed the old state_owner for us, and that we can
2622 * therefore safely retry using a new one. We should still warn
2623 * the user though...
2624 */
2625 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2626 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2627 " returned a bad sequence-id error!\n",
2628 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2629 exception.retry = 1;
2630 continue;
2631 }
550f5747
TM		 2632 /*
2633 * BAD_STATEID on OPEN means that the server cancelled our
2634 * state before it received the OPEN_CONFIRM.
2635 * Recover by retrying the request as per the discussion
2636 * on Page 181 of RFC3530.
2637 */
2638 if (status == -NFS4ERR_BAD_STATEID) {
2639 exception.retry = 1;
2640 continue;
2641 }
aac00a8d
TM		 2642 if (status == -EAGAIN) {
2643 /* We must have found a delegation */
2644 exception.retry = 1;
2645 continue;
2646 }
49f9a0fa
TM		 2647 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2648 continue;
2649 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2650 status, &exception));
2651 } while (exception.retry);
2652 return res;
2653}
2654
659bfcd6
TM		 2655static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2656 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2657 struct nfs4_state *state, struct nfs4_label *ilabel,
2658 struct nfs4_label *olabel)
1da177e4 2659{
3e4f6290 2660 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2661 struct nfs_setattrargs arg = {
3e4f6290 2662 .fh = NFS_FH(inode),
1da177e4
LT		 2663 .iap = sattr,
2664 .server = server,
2665 .bitmask = server->attr_bitmask,
1775fd3e 2666 .label = ilabel,
1da177e4
LT		 2667 };
2668 struct nfs_setattrres res = {
2669 .fattr = fattr,
1775fd3e 2670 .label = olabel,
1da177e4
LT		 2671 .server = server,
2672 };
2673 struct rpc_message msg = {
659bfcd6
TM		 2674 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2675 .rpc_argp = &arg,
2676 .rpc_resp = &res,
2677 .rpc_cred = cred,
1da177e4 2678 };
26e976a8 2679 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2680 fmode_t fmode;
2681 bool truncate;
65e4308d 2682 int status;
1da177e4 2683
aa9c2669
DQ		 2684 arg.bitmask = nfs4_bitmask(server, ilabel);
2685 if (ilabel)
2686 arg.bitmask = nfs4_bitmask(server, olabel);
2687
0e574af1 2688 nfs_fattr_init(fattr);
1da177e4 2689
ee3ae84e
TM		 2690 /* Servers should only apply open mode checks for file size changes */
2691 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2692 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2693
2694 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2695 /* Use that stateid */
0418dae1 2696 } else if (truncate && state != NULL) {
2a369153
TM		 2697 struct nfs_lockowner lockowner = {
2698 .l_owner = current->files,
2699 .l_pid = current->tgid,
2700 };
0418dae1
TM		 2701 if (!nfs4_valid_open_stateid(state))
2702 return -EBADF;
2703 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2704 &lockowner) == -EIO)
2705 return -EBADF;
08e9eac4 2706 } else
f597c537 2707 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2708
7c513058 2709 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2710 if (status == 0 && state != NULL)
2711 renew_lease(server, timestamp);
48c9579a 2712 trace_nfs4_setattr(inode, &arg.stateid, status);
65e4308d 2713 return status;
1da177e4
LT		 2714}
2715
659bfcd6
TM		 2716static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2717 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2718 struct nfs4_state *state, struct nfs4_label *ilabel,
2719 struct nfs4_label *olabel)
1da177e4 2720{
3e4f6290 2721 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2722 struct nfs4_exception exception = {
2723 .state = state,
3114ea7a 2724 .inode = inode,
a1d0b5ee 2725 };
1da177e4
LT		 2726 int err;
2727 do {
1775fd3e 2728 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2729 switch (err) {
2730 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2731 if (!(sattr->ia_valid & ATTR_SIZE)) {
2732 pr_warn_once("NFSv4: server %s is incorrectly "
2733 "applying open mode checks to "
2734 "a SETATTR that is not "
2735 "changing file size.\n",
2736 server->nfs_client->cl_hostname);
2737 }
451146be
TM		 2738 if (state && !(state->state & FMODE_WRITE)) {
2739 err = -EBADF;
2740 if (sattr->ia_valid & ATTR_OPEN)
2741 err = -EACCES;
2742 goto out;
2743 }
2744 }
2745 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2746 } while (exception.retry);
451146be 2747out:
1da177e4
LT		 2748 return err;
2749}
2750
500d701f
PT		 2751static bool
2752nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2753{
2754 if (inode == NULL || !nfs_have_layout(inode))
2755 return false;
2756
2757 return pnfs_wait_on_layoutreturn(inode, task);
2758}
2759
1da177e4
LT		 2760struct nfs4_closedata {
2761 struct inode *inode;
2762 struct nfs4_state *state;
2763 struct nfs_closeargs arg;
2764 struct nfs_closeres res;
516a6af6 2765 struct nfs_fattr fattr;
26e976a8 2766 unsigned long timestamp;
f7e8917a
FI		 2767 bool roc;
2768 u32 roc_barrier;
1da177e4
LT		 2769};
2770
963d8fe5 2771static void nfs4_free_closedata(void *data)
9512135d 2772{
963d8fe5
TM		 2773 struct nfs4_closedata *calldata = data;
2774 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2775 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2776
f7e8917a
FI		 2777 if (calldata->roc)
2778 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2779 nfs4_put_open_state(calldata->state);
2780 nfs_free_seqid(calldata->arg.seqid);
9512135d 2781 nfs4_put_state_owner(sp);
322b2b90 2782 nfs_sb_deactive(sb);
9512135d
TM		 2783 kfree(calldata);
2784}
2785
963d8fe5 2786static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2787{
963d8fe5 2788 struct nfs4_closedata *calldata = data;
1da177e4 2789 struct nfs4_state *state = calldata->state;
1da177e4 2790 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2791 nfs4_stateid *res_stateid = NULL;
1da177e4 2792
a3ca5651 2793 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2794 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2795 return;
42113a75 2796 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2797 /* hmm. we are done with the inode, and in the process of freeing
2798 * the state_owner. we keep this around to process errors
2799 */
1da177e4
LT		 2800 switch (task->tk_status) {
2801 case 0:
412f6c4c 2802 res_stateid = &calldata->res.stateid;
3c13cb5b 2803 if (calldata->roc)
f7e8917a
FI		 2804 pnfs_roc_set_barrier(state->inode,
2805 calldata->roc_barrier);
26e976a8 2806 renew_lease(server, calldata->timestamp);
412f6c4c 2807 break;
69794ad7 2808 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2809 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2810 case -NFS4ERR_OLD_STATEID:
2811 case -NFS4ERR_BAD_STATEID:
1da177e4 2812 case -NFS4ERR_EXPIRED:
566fcec6 2813 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2814 &state->open_stateid)) {
566fcec6
TM		 2815 rpc_restart_call_prepare(task);
2816 goto out_release;
2817 }
dc0b027d 2818 if (calldata->arg.fmode == 0)
9e33bed5 2819 break;
1da177e4 2820 default:
8478eaa1 2821 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2822 rpc_restart_call_prepare(task);
69794ad7
TM		 2823 goto out_release;
2824 }
1da177e4 2825 }
4a1e2feb
TM		 2826 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2827 res_stateid, calldata->arg.fmode);
69794ad7 2828out_release:
72211dbe 2829 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2830 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2831 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2832}
2833
4ce70ada 2834static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2835{
4ce70ada 2836 struct nfs4_closedata *calldata = data;
9512135d 2837 struct nfs4_state *state = calldata->state;
7fdab069 2838 struct inode *inode = calldata->inode;
aee7af35 2839 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2840 int call_close = 0;
9512135d 2841
a3ca5651 2842 dprintk("%s: begin!\n", __func__);
963d8fe5 2843 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2844 goto out_wait;
003707c7 2845
88069f77 2846 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2847 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2848 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2849 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2850 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2851 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2852 /* Calculate the change in open mode */
cd9288ff 2853 calldata->arg.fmode = 0;
e7616923 2854 if (state->n_rdwr == 0) {
cd9288ff
TM		 2855 if (state->n_rdonly == 0)
2856 call_close |= is_rdonly;
2857 else if (is_rdonly)
2858 calldata->arg.fmode |= FMODE_READ;
2859 if (state->n_wronly == 0)
2860 call_close |= is_wronly;
2861 else if (is_wronly)
2862 calldata->arg.fmode |= FMODE_WRITE;
2863 } else if (is_rdwr)
2864 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2865
2866 if (calldata->arg.fmode == 0)
2867 call_close |= is_rdwr;
2868
5d422301
TM		 2869 if (!nfs4_valid_open_stateid(state))
2870 call_close = 0;
4cecb76f 2871 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2872
2873 if (!call_close) {
963d8fe5 2874 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2875 goto out_no_action;
9512135d 2876 }
88069f77 2877
500d701f
PT		 2878 if (nfs4_wait_on_layoutreturn(inode, task)) {
2879 nfs_release_seqid(calldata->arg.seqid);
2880 goto out_wait;
2881 }
2882
3c13cb5b 2883 if (calldata->arg.fmode == 0)
88069f77 2884 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2885 if (calldata->roc)
2886 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2887
6ae37339
TM		 2888 calldata->arg.share_access =
2889 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2890 calldata->arg.fmode, 0);
88069f77 2891
516a6af6 2892 nfs_fattr_init(calldata->res.fattr);
26e976a8 2893 calldata->timestamp = jiffies;
7fdab069 2894 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2895 &calldata->arg.seq_args,
2896 &calldata->res.seq_res,
2240a9e2
TM		 2897 task) != 0)
2898 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2899 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2900 return;
2901out_no_action:
2902 task->tk_action = NULL;
2903out_wait:
2904 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2905}
2906
963d8fe5 2907static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2908 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2909 .rpc_call_done = nfs4_close_done,
2910 .rpc_release = nfs4_free_closedata,
2911};
2912
fe08c546
PT		 2913static bool nfs4_roc(struct inode *inode)
2914{
40dd4b7a 2915 if (!nfs_have_layout(inode))
fe08c546 2916 return false;
fe08c546
PT		 2917 return pnfs_roc(inode);
2918}
2919
1da177e4
LT		 2920/*
2921 * It is possible for data to be read/written from a mem-mapped file
2922 * after the sys_close call (which hits the vfs layer as a flush).
2923 * This means that we can't safely call nfsv4 close on a file until
2924 * the inode is cleared. This in turn means that we are not good
2925 * NFSv4 citizens - we do not indicate to the server to update the file's
2926 * share state even when we are done with one of the three share
2927 * stateid's in the inode.
2928 *
2929 * NOTE: Caller must be holding the sp->so_owner semaphore!
2930 */
1f7977c1 2931int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2932{
4a35bd41 2933 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2934 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2935 struct nfs4_closedata *calldata;
b39e625b
TM		 2936 struct nfs4_state_owner *sp = state->owner;
2937 struct rpc_task *task;
5138fde0
TM		 2938 struct rpc_message msg = {
2939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2940 .rpc_cred = state->owner->so_cred,
2941 };
c970aa85
TM		 2942 struct rpc_task_setup task_setup_data = {
2943 .rpc_client = server->client,
5138fde0 2944 .rpc_message = &msg,
c970aa85 2945 .callback_ops = &nfs4_close_ops,
101070ca 2946 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2947 .flags = RPC_TASK_ASYNC,
2948 };
9512135d 2949 int status = -ENOMEM;
1da177e4 2950
fa940720
WAA		 2951 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2952 &task_setup_data.rpc_client, &msg);
2953
8535b2be 2954 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2955 if (calldata == NULL)
9512135d 2956 goto out;
a9c92d6b 2957 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2958 calldata->inode = state->inode;
1da177e4 2959 calldata->state = state;
4a35bd41 2960 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2961 /* Serialization for the sequence id */
63f5f796
TM		 2962 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2963 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2964 if (IS_ERR(calldata->arg.seqid))
9512135d 2965 goto out_free_calldata;
dc0b027d 2966 calldata->arg.fmode = 0;
a65318bf 2967 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2968 calldata->res.fattr = &calldata->fattr;
c1d51931 2969 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2970 calldata->res.server = server;
fe08c546 2971 calldata->roc = nfs4_roc(state->inode);
643168c2 2972 nfs_sb_active(calldata->inode->i_sb);
9512135d 2973
1174dd1f
TM		 2974 msg.rpc_argp = &calldata->arg;
2975 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2976 task_setup_data.callback_data = calldata;
2977 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2978 if (IS_ERR(task))
2979 return PTR_ERR(task);
a49c3c77
TM		 2980 status = 0;
2981 if (wait)
2982 status = rpc_wait_for_completion_task(task);
b39e625b 2983 rpc_put_task(task);
a49c3c77 2984 return status;
9512135d
TM		 2985out_free_calldata:
2986 kfree(calldata);
2987out:
b39e625b
TM		 2988 nfs4_put_open_state(state);
2989 nfs4_put_state_owner(sp);
9512135d 2990 return status;
1da177e4
LT		 2991}
2992
2b484297 2993static struct inode *
5bc2afc2
TM		 2994nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2995 int open_flags, struct iattr *attr, int *opened)
1da177e4 2996{
1da177e4 2997 struct nfs4_state *state;
aa9c2669
DQ		 2998 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2999
3000 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3001
565277f6 3002 /* Protect against concurrent sillydeletes */
5bc2afc2 3003 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3004
3005 nfs4_label_release_security(label);
3006
f46e0bd3
TM		 3007 if (IS_ERR(state))
3008 return ERR_CAST(state);
275bb307 3009 return state->inode;
1da177e4
LT		 3010}
3011
1185a552 3012static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3013{
3014 if (ctx->state == NULL)
3015 return;
3016 if (is_sync)
643168c2 3017 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3018 else
643168c2 3019 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3020}
1da177e4 3021
b944dba3
TM		 3022#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3023#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3024#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3025
1da177e4
LT		 3026static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3027{
8c61282f 3028 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3029 struct nfs4_server_caps_arg args = {
3030 .fhandle = fhandle,
8c61282f 3031 .bitmask = bitmask,
43652ad5 3032 };
1da177e4
LT		 3033 struct nfs4_server_caps_res res = {};
3034 struct rpc_message msg = {
3035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3036 .rpc_argp = &args,
1da177e4
LT		 3037 .rpc_resp = &res,
3038 };
3039 int status;
3040
8c61282f
KM		 3041 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3042 FATTR4_WORD0_FH_EXPIRE_TYPE |
3043 FATTR4_WORD0_LINK_SUPPORT |
3044 FATTR4_WORD0_SYMLINK_SUPPORT |
3045 FATTR4_WORD0_ACLSUPPORT;
3046 if (minorversion)
3047 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3048
7c513058 3049 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3050 if (status == 0) {
b944dba3 3051 /* Sanity check the server answers */
8c61282f 3052 switch (minorversion) {
b944dba3
TM		 3053 case 0:
3054 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3055 res.attr_bitmask[2] = 0;
3056 break;
3057 case 1:
3058 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3059 break;
3060 case 2:
3061 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3062 }
1da177e4 3063 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3064 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3065 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3066 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3067 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3068 NFS_CAP_CTIME|NFS_CAP_MTIME|
3069 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3070 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3071 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3072 server->caps |= NFS_CAP_ACLS;
3073 if (res.has_links != 0)
3074 server->caps |= NFS_CAP_HARDLINKS;
3075 if (res.has_symlinks != 0)
3076 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3077 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3078 server->caps |= NFS_CAP_FILEID;
3079 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3080 server->caps |= NFS_CAP_MODE;
3081 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3082 server->caps |= NFS_CAP_NLINK;
3083 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3084 server->caps |= NFS_CAP_OWNER;
3085 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3086 server->caps |= NFS_CAP_OWNER_GROUP;
3087 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3088 server->caps |= NFS_CAP_ATIME;
3089 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3090 server->caps |= NFS_CAP_CTIME;
3091 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3092 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3093#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3094 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3095 server->caps |= NFS_CAP_SECURITY_LABEL;
3096#endif
3097 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3098 sizeof(server->attr_bitmask));
b944dba3 3099 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3100
a65318bf
TM		 3101 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3102 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3103 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3104 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3105 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3106 sizeof(server->exclcreat_bitmask));
1da177e4 3107 server->acl_bitmask = res.acl_bitmask;
264e6351 3108 server->fh_expire_type = res.fh_expire_type;
1da177e4 3109 }
cccef3b9 3110
1da177e4
LT		 3111 return status;
3112}
3113
55a97593 3114int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3115{
3116 struct nfs4_exception exception = { };
3117 int err;
3118 do {
3119 err = nfs4_handle_exception(server,
3120 _nfs4_server_capabilities(server, fhandle),
3121 &exception);
3122 } while (exception.retry);
3123 return err;
3124}
3125
3126static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3127 struct nfs_fsinfo *info)
3128{
aa9c2669 3129 u32 bitmask[3];
1da177e4 3130 struct nfs4_lookup_root_arg args = {
aa9c2669 3131 .bitmask = bitmask,
1da177e4
LT		 3132 };
3133 struct nfs4_lookup_res res = {
3134 .server = server,
0e574af1 3135 .fattr = info->fattr,
1da177e4
LT		 3136 .fh = fhandle,
3137 };
3138 struct rpc_message msg = {
3139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3140 .rpc_argp = &args,
3141 .rpc_resp = &res,
3142 };
008f55d0 3143
aa9c2669
DQ		 3144 bitmask[0] = nfs4_fattr_bitmap[0];
3145 bitmask[1] = nfs4_fattr_bitmap[1];
3146 /*
3147 * Process the label in the upcoming getfattr
3148 */
3149 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3150
0e574af1 3151 nfs_fattr_init(info->fattr);
7c513058 3152 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3153}
3154
3155static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3156 struct nfs_fsinfo *info)
3157{
3158 struct nfs4_exception exception = { };
3159 int err;
3160 do {
fb8a5ba8 3161 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3162 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3163 switch (err) {
3164 case 0:
3165 case -NFS4ERR_WRONGSEC:
05e9cfb4 3166 goto out;
fb8a5ba8
BS		 3167 default:
3168 err = nfs4_handle_exception(server, err, &exception);
3169 }
1da177e4 3170 } while (exception.retry);
05e9cfb4 3171out:
1da177e4
LT		 3172 return err;
3173}
3174
8f70e95f
BS		 3175static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3176 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3177{
c2190661
TM		 3178 struct rpc_auth_create_args auth_args = {
3179 .pseudoflavor = flavor,
3180 };
8f70e95f
BS		 3181 struct rpc_auth *auth;
3182 int ret;
3183
c2190661 3184 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3185 if (IS_ERR(auth)) {
75bc8821 3186 ret = -EACCES;
8f70e95f
BS		 3187 goto out;
3188 }
3189 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3190out:
3191 return ret;
3192}
3193
9a744ba3
CL		 3194/*
3195 * Retry pseudoroot lookup with various security flavors. We do this when:
3196 *
3197 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3198 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3199 *
3200 * Returns zero on success, or a negative NFS4ERR value, or a
3201 * negative errno value.
3202 */
801a16dc 3203static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3204 struct nfs_fsinfo *info)
1da177e4 3205{
9a744ba3
CL		 3206 /* Per 3530bis 15.33.5 */
3207 static const rpc_authflavor_t flav_array[] = {
3208 RPC_AUTH_GSS_KRB5P,
3209 RPC_AUTH_GSS_KRB5I,
3210 RPC_AUTH_GSS_KRB5,
c4eafe11 3211 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3212 RPC_AUTH_NULL,
3213 };
3214 int status = -EPERM;
3215 size_t i;
6a1a1e34 3216
4d4b69dd
WAA		 3217 if (server->auth_info.flavor_len > 0) {
3218 /* try each flavor specified by user */
3219 for (i = 0; i < server->auth_info.flavor_len; i++) {
3220 status = nfs4_lookup_root_sec(server, fhandle, info,
3221 server->auth_info.flavors[i]);
3222 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3223 continue;
3224 break;
3225 }
3226 } else {
3227 /* no flavors specified by user, try default list */
3228 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3229 status = nfs4_lookup_root_sec(server, fhandle, info,
3230 flav_array[i]);
3231 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3232 continue;
3233 break;
3234 }
8f70e95f 3235 }
9a744ba3 3236
fb8a5ba8
BS		 3237 /*
3238 * -EACCESS could mean that the user doesn't have correct permissions
3239 * to access the mount. It could also mean that we tried to mount
3240 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3241 * existing mount programs don't handle -EACCES very well so it should
3242 * be mapped to -EPERM instead.
3243 */
3244 if (status == -EACCES)
3245 status = -EPERM;
801a16dc
BS		 3246 return status;
3247}
3248
2ed4b95b
CL		 3249static int nfs4_do_find_root_sec(struct nfs_server *server,
3250 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3251{
3252 int mv = server->nfs_client->cl_minorversion;
3253 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3254}
3255
3256/**
3257 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3258 * @server: initialized nfs_server handle
3259 * @fhandle: we fill in the pseudo-fs root file handle
3260 * @info: we fill in an FSINFO struct
5e6b1990 3261 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3262 *
3263 * Returns zero on success, or a negative errno.
801a16dc 3264 */
3028eb2b 3265int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3266 struct nfs_fsinfo *info,
3267 bool auth_probe)
801a16dc 3268{
c7757074 3269 int status = 0;
2ed4b95b 3270
c7757074 3271 if (!auth_probe)
5e6b1990 3272 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3273
3274 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3275 status = nfs4_do_find_root_sec(server, fhandle, info);
3276
1da177e4
LT		 3277 if (status == 0)
3278 status = nfs4_server_capabilities(server, fhandle);
3279 if (status == 0)
3280 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3281
c12e87f4 3282 return nfs4_map_errors(status);
1da177e4
LT		 3283}
3284
bae36241
BS		 3285static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3286 struct nfs_fsinfo *info)
3287{
3288 int error;
3289 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3290 struct nfs4_label *label = NULL;
bae36241
BS		 3291
3292 error = nfs4_server_capabilities(server, mntfh);
3293 if (error < 0) {
3294 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3295 return error;
3296 }
3297
14c43f76
DQ		 3298 label = nfs4_label_alloc(server, GFP_KERNEL);
3299 if (IS_ERR(label))
3300 return PTR_ERR(label);
3301
1775fd3e 3302 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3303 if (error < 0) {
3304 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3305 goto err_free_label;
bae36241
BS		 3306 }
3307
3308 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3309 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3310 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3311
14c43f76
DQ		 3312err_free_label:
3313 nfs4_label_free(label);
3314
bae36241
BS		 3315 return error;
3316}
3317
6b97fd3d
MN		 3318/*
3319 * Get locations and (maybe) other attributes of a referral.
3320 * Note that we'll actually follow the referral later when
3321 * we detect fsid mismatch in inode revalidation
3322 */
f05d147f
BS		 3323static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3324 const struct qstr *name, struct nfs_fattr *fattr,
3325 struct nfs_fh *fhandle)
6b97fd3d
MN		 3326{
3327 int status = -ENOMEM;
3328 struct page *page = NULL;
3329 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3330
3331 page = alloc_page(GFP_KERNEL);
3332 if (page == NULL)
3333 goto out;
3334 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3335 if (locations == NULL)
3336 goto out;
3337
f05d147f 3338 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3339 if (status != 0)
3340 goto out;
519ae255
CL		 3341
3342 /*
3343 * If the fsid didn't change, this is a migration event, not a
3344 * referral. Cause us to drop into the exception handler, which
3345 * will kick off migration recovery.
3346 */
6b97fd3d 3347 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3348 dprintk("%s: server did not return a different fsid for"
3349 " a referral at %s\n", __func__, name->name);
519ae255 3350 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3351 goto out;
3352 }
533eb461
AA		 3353 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3354 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3355
533eb461 3356 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3357 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3358 memset(fhandle, 0, sizeof(struct nfs_fh));
3359out:
3360 if (page)
3361 __free_page(page);
5d7ca35a 3362 kfree(locations);
6b97fd3d
MN		 3363 return status;
3364}
3365
1775fd3e
DQ		 3366static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3367 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3368{
3369 struct nfs4_getattr_arg args = {
3370 .fh = fhandle,
3371 .bitmask = server->attr_bitmask,
3372 };
3373 struct nfs4_getattr_res res = {
3374 .fattr = fattr,
1775fd3e 3375 .label = label,
1da177e4
LT		 3376 .server = server,
3377 };
3378 struct rpc_message msg = {
3379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3380 .rpc_argp = &args,
3381 .rpc_resp = &res,
3382 };
aa9c2669
DQ		 3383
3384 args.bitmask = nfs4_bitmask(server, label);
3385
0e574af1 3386 nfs_fattr_init(fattr);
7c513058 3387 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3388}
3389
1775fd3e
DQ		 3390static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3391 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3392{
3393 struct nfs4_exception exception = { };
3394 int err;
3395 do {
b5f875a9
TM		 3396 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3397 trace_nfs4_getattr(server, fhandle, fattr, err);
3398 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3399 &exception);
3400 } while (exception.retry);
3401 return err;
3402}
3403
3404/*
3405 * The file is not closed if it is opened due to the a request to change
3406 * the size of the file. The open call will not be needed once the
3407 * VFS layer lookup-intents are implemented.
3408 *
3409 * Close is called when the inode is destroyed.
3410 * If we haven't opened the file for O_WRONLY, we
3411 * need to in the size_change case to obtain a stateid.
3412 *
3413 * Got race?
3414 * Because OPEN is always done by name in nfsv4, it is
3415 * possible that we opened a different file by the same
3416 * name. We can recognize this race condition, but we
3417 * can't do anything about it besides returning an error.
3418 *
3419 * This will be fixed with VFS changes (lookup-intent).
3420 */
3421static int
3422nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3423 struct iattr *sattr)
3424{
2b0143b5 3425 struct inode *inode = d_inode(dentry);
659bfcd6 3426 struct rpc_cred *cred = NULL;
d530838b 3427 struct nfs4_state *state = NULL;
14c43f76 3428 struct nfs4_label *label = NULL;
1da177e4
LT		 3429 int status;
3430
88ac815c
PT		 3431 if (pnfs_ld_layoutret_on_setattr(inode) &&
3432 sattr->ia_valid & ATTR_SIZE &&
3433 sattr->ia_size < i_size_read(inode))
24028672 3434 pnfs_commit_and_return_layout(inode);
8a1636c4 3435
0e574af1 3436 nfs_fattr_init(fattr);
1da177e4 3437
2669940d
AA		 3438 /* Deal with open(O_TRUNC) */
3439 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3440 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3441
3442 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3443 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3444 return 0;
3445
d530838b 3446 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3447 if (sattr->ia_valid & ATTR_FILE) {
3448 struct nfs_open_context *ctx;
3449
3450 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3451 if (ctx) {
3452 cred = ctx->cred;
3453 state = ctx->state;
3454 }
659bfcd6 3455 }
08e9eac4 3456
14c43f76
DQ		 3457 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3458 if (IS_ERR(label))
3459 return PTR_ERR(label);
3460
3461 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3462 if (status == 0) {
f044636d 3463 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3464 nfs_setsecurity(inode, fattr, label);
3465 }
14c43f76 3466 nfs4_label_free(label);
1da177e4
LT		 3467 return status;
3468}
3469
0c2e53f1
TM		 3470static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3471 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3472 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3473{
0c2e53f1 3474 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3475 int status;
3476 struct nfs4_lookup_arg args = {
3477 .bitmask = server->attr_bitmask,
0c2e53f1 3478 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3479 .name = name,
3480 };
3481 struct nfs4_lookup_res res = {
3482 .server = server,
3483 .fattr = fattr,
aa9c2669 3484 .label = label,
2b3de441
DH		 3485 .fh = fhandle,
3486 };
3487 struct rpc_message msg = {
3488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3489 .rpc_argp = &args,
3490 .rpc_resp = &res,
3491 };
3492
aa9c2669
DQ		 3493 args.bitmask = nfs4_bitmask(server, label);
3494
2b3de441
DH		 3495 nfs_fattr_init(fattr);
3496
1da177e4 3497 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3498 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3499 dprintk("NFS reply lookup: %d\n", status);
3500 return status;
3501}
3502
72de53ec 3503static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3504{
7ebb9315 3505 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3506 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3507 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3508 fattr->nlink = 2;
3509}
3510
72de53ec
BS		 3511static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3512 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3513 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3514{
3515 struct nfs4_exception exception = { };
72de53ec 3516 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3517 int err;
3518 do {
1775fd3e 3519 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3520 trace_nfs4_lookup(dir, name, err);
72de53ec 3521 switch (err) {
08ef7bd3 3522 case -NFS4ERR_BADNAME:
72de53ec
BS		 3523 err = -ENOENT;
3524 goto out;
0c2e53f1 3525 case -NFS4ERR_MOVED:
f05d147f 3526 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3527 if (err == -NFS4ERR_MOVED)
3528 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3529 goto out;
0c2e53f1 3530 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3531 err = -EPERM;
3532 if (client != *clnt)
3533 goto out;
66b06860 3534 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3535 if (IS_ERR(client))
3536 return PTR_ERR(client);
3537
3538 exception.retry = 1;
3539 break;
3540 default:
3541 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3542 }
1da177e4 3543 } while (exception.retry);
72de53ec
BS		 3544
3545out:
3546 if (err == 0)
3547 *clnt = client;
3548 else if (client != *clnt)
3549 rpc_shutdown_client(client);
3550
1da177e4
LT		 3551 return err;
3552}
3553
80a16b21 3554static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3555 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3556 struct nfs4_label *label)
72de53ec
BS		 3557{
3558 int status;
3559 struct rpc_clnt *client = NFS_CLIENT(dir);
3560
1775fd3e 3561 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3562 if (client != NFS_CLIENT(dir)) {
3563 rpc_shutdown_client(client);
3564 nfs_fixup_secinfo_attributes(fattr);
3565 }
3566 return status;
3567}
3568
f05d147f
BS		 3569struct rpc_clnt *
3570nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3571 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3572{
b72888cb 3573 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3574 int status;
f05d147f 3575
1775fd3e 3576 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3577 if (status < 0)
f05d147f 3578 return ERR_PTR(status);
b72888cb 3579 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3580}
3581
1da177e4
LT		 3582static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3583{
76b32999 3584 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3585 struct nfs4_accessargs args = {
3586 .fh = NFS_FH(inode),
a4980e78 3587 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3588 };
3589 struct nfs4_accessres res = {
3590 .server = server,
1da177e4 3591 };
1da177e4
LT		 3592 struct rpc_message msg = {
3593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3594 .rpc_argp = &args,
3595 .rpc_resp = &res,
3596 .rpc_cred = entry->cred,
3597 };
3598 int mode = entry->mask;
aa9c2669 3599 int status = 0;
1da177e4
LT		 3600
3601 /*
3602 * Determine which access bits we want to ask for...
3603 */
3604 if (mode & MAY_READ)
3605 args.access |= NFS4_ACCESS_READ;
3606 if (S_ISDIR(inode->i_mode)) {
3607 if (mode & MAY_WRITE)
3608 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3609 if (mode & MAY_EXEC)
3610 args.access |= NFS4_ACCESS_LOOKUP;
3611 } else {
3612 if (mode & MAY_WRITE)
3613 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3614 if (mode & MAY_EXEC)
3615 args.access |= NFS4_ACCESS_EXECUTE;
3616 }
c407d41a
TM		 3617
3618 res.fattr = nfs_alloc_fattr();
3619 if (res.fattr == NULL)
3620 return -ENOMEM;
3621
7c513058 3622 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3623 if (!status) {
6168f62c 3624 nfs_access_set_mask(entry, res.access);
c407d41a 3625 nfs_refresh_inode(inode, res.fattr);
1da177e4 3626 }
c407d41a 3627 nfs_free_fattr(res.fattr);
1da177e4
LT		 3628 return status;
3629}
3630
3631static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3632{
3633 struct nfs4_exception exception = { };
3634 int err;
3635 do {
c1578b76
TM		 3636 err = _nfs4_proc_access(inode, entry);
3637 trace_nfs4_access(inode, err);
3638 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3639 &exception);
3640 } while (exception.retry);
3641 return err;
3642}
3643
3644/*
3645 * TODO: For the time being, we don't try to get any attributes
3646 * along with any of the zero-copy operations READ, READDIR,
3647 * READLINK, WRITE.
3648 *
3649 * In the case of the first three, we want to put the GETATTR
3650 * after the read-type operation -- this is because it is hard
3651 * to predict the length of a GETATTR response in v4, and thus
3652 * align the READ data correctly. This means that the GETATTR
3653 * may end up partially falling into the page cache, and we should
3654 * shift it into the 'tail' of the xdr_buf before processing.
3655 * To do this efficiently, we need to know the total length
3656 * of data received, which doesn't seem to be available outside
3657 * of the RPC layer.
3658 *
3659 * In the case of WRITE, we also want to put the GETATTR after
3660 * the operation -- in this case because we want to make sure
140150db 3661 * we get the post-operation mtime and size.
1da177e4
LT		 3662 *
3663 * Both of these changes to the XDR layer would in fact be quite
3664 * minor, but I decided to leave them for a subsequent patch.
3665 */
3666static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3667 unsigned int pgbase, unsigned int pglen)
3668{
3669 struct nfs4_readlink args = {
3670 .fh = NFS_FH(inode),
3671 .pgbase = pgbase,
3672 .pglen = pglen,
3673 .pages = &page,
3674 };
f50c7000 3675 struct nfs4_readlink_res res;
1da177e4
LT		 3676 struct rpc_message msg = {
3677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3678 .rpc_argp = &args,
f50c7000 3679 .rpc_resp = &res,
1da177e4
LT		 3680 };
3681
7c513058 3682 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3683}
3684
3685static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3686 unsigned int pgbase, unsigned int pglen)
3687{
3688 struct nfs4_exception exception = { };
3689 int err;
3690 do {
c1578b76
TM		 3691 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3692 trace_nfs4_readlink(inode, err);
3693 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3694 &exception);
3695 } while (exception.retry);
3696 return err;
3697}
3698
1da177e4 3699/*
8867fe58 3700 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3701 */
1da177e4
LT		 3702static int
3703nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3704 int flags)
1da177e4 3705{
aa9c2669 3706 struct nfs4_label l, *ilabel = NULL;
8867fe58 3707 struct nfs_open_context *ctx;
1da177e4 3708 struct nfs4_state *state;
1da177e4
LT		 3709 int status = 0;
3710
8867fe58
MS		 3711 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3712 if (IS_ERR(ctx))
3713 return PTR_ERR(ctx);
3714
aa9c2669
DQ		 3715 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3716
a8a5da99 3717 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3718 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3719 if (IS_ERR(state)) {
3720 status = PTR_ERR(state);
c0204fd2 3721 goto out;
1da177e4 3722 }
1da177e4 3723out:
aa9c2669 3724 nfs4_label_release_security(ilabel);
8867fe58 3725 put_nfs_open_context(ctx);
1da177e4
LT		 3726 return status;
3727}
3728
3729static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3730{
16e42959 3731 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3732 struct nfs_removeargs args = {
1da177e4 3733 .fh = NFS_FH(dir),
26fe5750 3734 .name = *name,
16e42959 3735 };
4fdc17b2 3736 struct nfs_removeres res = {
16e42959 3737 .server = server,
1da177e4 3738 };
1da177e4 3739 struct rpc_message msg = {
4fdc17b2
TM		 3740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3741 .rpc_argp = &args,
3742 .rpc_resp = &res,
1da177e4 3743 };
778d2817 3744 int status;
1da177e4 3745
7c513058 3746 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3747 if (status == 0)
16e42959 3748 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3749 return status;
3750}
3751
3752static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3753{
3754 struct nfs4_exception exception = { };
3755 int err;
3756 do {
078ea3df
TM		 3757 err = _nfs4_proc_remove(dir, name);
3758 trace_nfs4_remove(dir, name, err);
3759 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3760 &exception);
3761 } while (exception.retry);
3762 return err;
3763}
3764
e4eff1a6 3765static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3766{
e4eff1a6
TM		 3767 struct nfs_server *server = NFS_SERVER(dir);
3768 struct nfs_removeargs *args = msg->rpc_argp;
3769 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3770
e4eff1a6 3771 res->server = server;
1da177e4 3772 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3773 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3774
3775 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3776}
3777
34e137cc
BS		 3778static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3779{
d9afbd1b
TM		 3780 nfs4_setup_sequence(NFS_SERVER(data->dir),
3781 &data->args.seq_args,
3782 &data->res.seq_res,
3783 task);
1da177e4
LT		 3784}
3785
e4eff1a6 3786static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3787{
078ea3df
TM		 3788 struct nfs_unlinkdata *data = task->tk_calldata;
3789 struct nfs_removeres *res = &data->res;
e4eff1a6 3790
14516c3a
TM		 3791 if (!nfs4_sequence_done(task, &res->seq_res))
3792 return 0;
8478eaa1
N		 3793 if (nfs4_async_handle_error(task, res->server, NULL,
3794 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3795 return 0;
3796 update_changeattr(dir, &res->cinfo);
e4eff1a6 3797 return 1;
1da177e4
LT		 3798}
3799
d3d4152a
JL		 3800static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3801{
3802 struct nfs_server *server = NFS_SERVER(dir);
3803 struct nfs_renameargs *arg = msg->rpc_argp;
3804 struct nfs_renameres *res = msg->rpc_resp;
3805
3806 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3807 res->server = server;
a9c92d6b 3808 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3809}
3810
c6bfa1a1
BS		 3811static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3812{
d9afbd1b
TM		 3813 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3814 &data->args.seq_args,
3815 &data->res.seq_res,
3816 task);
d3d4152a
JL		 3817}
3818
3819static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3820 struct inode *new_dir)
3821{
fbc6f7c2
TM		 3822 struct nfs_renamedata *data = task->tk_calldata;
3823 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3824
3825 if (!nfs4_sequence_done(task, &res->seq_res))
3826 return 0;
8478eaa1 3827 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3828 return 0;
3829
3830 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3831 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3832 return 1;
3833}
3834
1da177e4
LT		 3835static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3836{
91ba2eee 3837 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3838 struct nfs4_link_arg arg = {
3839 .fh = NFS_FH(inode),
3840 .dir_fh = NFS_FH(dir),
3841 .name = name,
91ba2eee
TM		 3842 .bitmask = server->attr_bitmask,
3843 };
91ba2eee
TM		 3844 struct nfs4_link_res res = {
3845 .server = server,
1775fd3e 3846 .label = NULL,
1da177e4 3847 };
1da177e4
LT		 3848 struct rpc_message msg = {
3849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3850 .rpc_argp = &arg,
91ba2eee 3851 .rpc_resp = &res,
1da177e4 3852 };
136f2627
TM		 3853 int status = -ENOMEM;
3854
3855 res.fattr = nfs_alloc_fattr();
778d2817 3856 if (res.fattr == NULL)
136f2627 3857 goto out;
1da177e4 3858
14c43f76
DQ		 3859 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3860 if (IS_ERR(res.label)) {
3861 status = PTR_ERR(res.label);
3862 goto out;
3863 }
aa9c2669 3864 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3865
7c513058 3866 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3867 if (!status) {
3868 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3869 status = nfs_post_op_update_inode(inode, res.fattr);
3870 if (!status)
3871 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3872 }
14c43f76
DQ		 3873
3874
3875 nfs4_label_free(res.label);
3876
136f2627 3877out:
136f2627 3878 nfs_free_fattr(res.fattr);
1da177e4
LT		 3879 return status;
3880}
3881
3882static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3883{
3884 struct nfs4_exception exception = { };
3885 int err;
3886 do {
3887 err = nfs4_handle_exception(NFS_SERVER(inode),
3888 _nfs4_proc_link(inode, dir, name),
3889 &exception);
3890 } while (exception.retry);
3891 return err;
3892}
3893
57dc9a57
TM		 3894struct nfs4_createdata {
3895 struct rpc_message msg;
3896 struct nfs4_create_arg arg;
3897 struct nfs4_create_res res;
3898 struct nfs_fh fh;
3899 struct nfs_fattr fattr;
1775fd3e 3900 struct nfs4_label *label;
57dc9a57
TM		 3901};
3902
3903static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3904 struct qstr *name, struct iattr *sattr, u32 ftype)
3905{
3906 struct nfs4_createdata *data;
3907
3908 data = kzalloc(sizeof(*data), GFP_KERNEL);
3909 if (data != NULL) {
3910 struct nfs_server *server = NFS_SERVER(dir);
3911
14c43f76
DQ		 3912 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3913 if (IS_ERR(data->label))
3914 goto out_free;
3915
57dc9a57
TM		 3916 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3917 data->msg.rpc_argp = &data->arg;
3918 data->msg.rpc_resp = &data->res;
3919 data->arg.dir_fh = NFS_FH(dir);
3920 data->arg.server = server;
3921 data->arg.name = name;
3922 data->arg.attrs = sattr;
3923 data->arg.ftype = ftype;
aa9c2669 3924 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3925 data->res.server = server;
3926 data->res.fh = &data->fh;
3927 data->res.fattr = &data->fattr;
1775fd3e 3928 data->res.label = data->label;
57dc9a57 3929 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3930 }
3931 return data;
14c43f76
DQ		 3932out_free:
3933 kfree(data);
3934 return NULL;
57dc9a57
TM		 3935}
3936
3937static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3938{
7c513058 3939 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3940 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3941 if (status == 0) {
3942 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3943 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3944 }
3945 return status;
3946}
3947
3948static void nfs4_free_createdata(struct nfs4_createdata *data)
3949{
14c43f76 3950 nfs4_label_free(data->label);
57dc9a57
TM		 3951 kfree(data);
3952}
3953
4f390c15 3954static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3955 struct page *page, unsigned int len, struct iattr *sattr,
3956 struct nfs4_label *label)
1da177e4 3957{
57dc9a57
TM		 3958 struct nfs4_createdata *data;
3959 int status = -ENAMETOOLONG;
1da177e4 3960
94a6d753 3961 if (len > NFS4_MAXPATHLEN)
57dc9a57 3962 goto out;
4f390c15 3963
57dc9a57
TM		 3964 status = -ENOMEM;
3965 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3966 if (data == NULL)
3967 goto out;
3968
3969 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3970 data->arg.u.symlink.pages = &page;
3971 data->arg.u.symlink.len = len;
1775fd3e 3972 data->arg.label = label;
1da177e4 3973
57dc9a57
TM		 3974 status = nfs4_do_create(dir, dentry, data);
3975
3976 nfs4_free_createdata(data);
3977out:
1da177e4
LT		 3978 return status;
3979}
3980
4f390c15 3981static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3982 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3983{
3984 struct nfs4_exception exception = { };
aa9c2669 3985 struct nfs4_label l, *label = NULL;
1da177e4 3986 int err;
aa9c2669
DQ		 3987
3988 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3989
1da177e4 3990 do {
078ea3df
TM		 3991 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3992 trace_nfs4_symlink(dir, &dentry->d_name, err);
3993 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3994 &exception);
3995 } while (exception.retry);
aa9c2669
DQ		 3996
3997 nfs4_label_release_security(label);
1da177e4
LT		 3998 return err;
3999}
4000
4001static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4002 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4003{
57dc9a57
TM		 4004 struct nfs4_createdata *data;
4005 int status = -ENOMEM;
1da177e4 4006
57dc9a57
TM		 4007 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4008 if (data == NULL)
4009 goto out;
4010
1775fd3e 4011 data->arg.label = label;
57dc9a57
TM		 4012 status = nfs4_do_create(dir, dentry, data);
4013
4014 nfs4_free_createdata(data);
4015out:
1da177e4
LT		 4016 return status;
4017}
4018
4019static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4020 struct iattr *sattr)
4021{
4022 struct nfs4_exception exception = { };
aa9c2669 4023 struct nfs4_label l, *label = NULL;
1da177e4 4024 int err;
a8a5da99 4025
aa9c2669
DQ		 4026 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4027
a8a5da99 4028 sattr->ia_mode &= ~current_umask();
1da177e4 4029 do {
078ea3df
TM		 4030 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4031 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4032 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4033 &exception);
4034 } while (exception.retry);
aa9c2669
DQ		 4035 nfs4_label_release_security(label);
4036
1da177e4
LT		 4037 return err;
4038}
4039
4040static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4041 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4042{
2b0143b5 4043 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4044 struct nfs4_readdir_arg args = {
4045 .fh = NFS_FH(dir),
56e4ebf8 4046 .pages = pages,
1da177e4
LT		 4047 .pgbase = 0,
4048 .count = count,
2b0143b5 4049 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4050 .plus = plus,
1da177e4
LT		 4051 };
4052 struct nfs4_readdir_res res;
4053 struct rpc_message msg = {
4054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4055 .rpc_argp = &args,
4056 .rpc_resp = &res,
4057 .rpc_cred = cred,
4058 };
4059 int status;
4060
6de1472f
AV		 4061 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4062 dentry,
eadf4598 4063 (unsigned long long)cookie);
c3f52af3 4064 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4065 res.pgbase = args.pgbase;
7c513058 4066 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4067 if (status >= 0) {
c3f52af3 4068 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4069 status += args.pgbase;
4070 }
c4812998
TM		 4071
4072 nfs_invalidate_atime(dir);
4073
3110ff80 4074 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4075 return status;
4076}
4077
4078static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4079 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4080{
4081 struct nfs4_exception exception = { };
4082 int err;
4083 do {
c1578b76
TM		 4084 err = _nfs4_proc_readdir(dentry, cred, cookie,
4085 pages, count, plus);
2b0143b5
DH		 4086 trace_nfs4_readdir(d_inode(dentry), err);
4087 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4088 &exception);
4089 } while (exception.retry);
4090 return err;
4091}
4092
4093static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4094 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4095{
57dc9a57
TM		 4096 struct nfs4_createdata *data;
4097 int mode = sattr->ia_mode;
4098 int status = -ENOMEM;
1da177e4 4099
57dc9a57
TM		 4100 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4101 if (data == NULL)
4102 goto out;
4103
1da177e4 4104 if (S_ISFIFO(mode))
57dc9a57 4105 data->arg.ftype = NF4FIFO;
1da177e4 4106 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4107 data->arg.ftype = NF4BLK;
4108 data->arg.u.device.specdata1 = MAJOR(rdev);
4109 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4110 }
4111 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4112 data->arg.ftype = NF4CHR;
4113 data->arg.u.device.specdata1 = MAJOR(rdev);
4114 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4115 } else if (!S_ISSOCK(mode)) {
4116 status = -EINVAL;
4117 goto out_free;
1da177e4 4118 }
1775fd3e 4119
aa9c2669 4120 data->arg.label = label;
57dc9a57 4121 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4122out_free:
57dc9a57
TM		 4123 nfs4_free_createdata(data);
4124out:
1da177e4
LT		 4125 return status;
4126}
4127
4128static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4129 struct iattr *sattr, dev_t rdev)
4130{
4131 struct nfs4_exception exception = { };
aa9c2669 4132 struct nfs4_label l, *label = NULL;
1da177e4 4133 int err;
a8a5da99 4134
aa9c2669
DQ		 4135 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4136
a8a5da99 4137 sattr->ia_mode &= ~current_umask();
1da177e4 4138 do {
078ea3df
TM		 4139 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4140 trace_nfs4_mknod(dir, &dentry->d_name, err);
4141 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4142 &exception);
4143 } while (exception.retry);
aa9c2669
DQ		 4144
4145 nfs4_label_release_security(label);
4146
1da177e4
LT		 4147 return err;
4148}
4149
4150static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4151 struct nfs_fsstat *fsstat)
4152{
4153 struct nfs4_statfs_arg args = {
4154 .fh = fhandle,
4155 .bitmask = server->attr_bitmask,
4156 };
24ad148a
BH		 4157 struct nfs4_statfs_res res = {
4158 .fsstat = fsstat,
4159 };
1da177e4
LT		 4160 struct rpc_message msg = {
4161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4162 .rpc_argp = &args,
24ad148a 4163 .rpc_resp = &res,
1da177e4
LT		 4164 };
4165
0e574af1 4166 nfs_fattr_init(fsstat->fattr);
7c513058 4167 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4168}
4169
4170static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4171{
4172 struct nfs4_exception exception = { };
4173 int err;
4174 do {
4175 err = nfs4_handle_exception(server,
4176 _nfs4_proc_statfs(server, fhandle, fsstat),
4177 &exception);
4178 } while (exception.retry);
4179 return err;
4180}
4181
4182static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4183 struct nfs_fsinfo *fsinfo)
4184{
4185 struct nfs4_fsinfo_arg args = {
4186 .fh = fhandle,
4187 .bitmask = server->attr_bitmask,
4188 };
3dda5e43
BH		 4189 struct nfs4_fsinfo_res res = {
4190 .fsinfo = fsinfo,
4191 };
1da177e4
LT		 4192 struct rpc_message msg = {
4193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4194 .rpc_argp = &args,
3dda5e43 4195 .rpc_resp = &res,
1da177e4
LT		 4196 };
4197
7c513058 4198 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4199}
4200
4201static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4202{
4203 struct nfs4_exception exception = { };
83ca7f5a 4204 unsigned long now = jiffies;
1da177e4
LT		 4205 int err;
4206
4207 do {
83ca7f5a 4208 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4209 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4210 if (err == 0) {
4211 struct nfs_client *clp = server->nfs_client;
4212
4213 spin_lock(&clp->cl_lock);
4214 clp->cl_lease_time = fsinfo->lease_time * HZ;
4215 clp->cl_last_renewal = now;
4216 spin_unlock(&clp->cl_lock);
4217 break;
4218 }
4219 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4220 } while (exception.retry);
4221 return err;
4222}
4223
4224static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4225{
e38eb650
BS		 4226 int error;
4227
0e574af1 4228 nfs_fattr_init(fsinfo->fattr);
e38eb650 4229 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4230 if (error == 0) {
4231 /* block layout checks this! */
4232 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4233 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4234 }
e38eb650
BS		 4235
4236 return error;
1da177e4
LT		 4237}
4238
4239static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4240 struct nfs_pathconf *pathconf)
4241{
4242 struct nfs4_pathconf_arg args = {
4243 .fh = fhandle,
4244 .bitmask = server->attr_bitmask,
4245 };
d45b2989
BH		 4246 struct nfs4_pathconf_res res = {
4247 .pathconf = pathconf,
4248 };
1da177e4
LT		 4249 struct rpc_message msg = {
4250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4251 .rpc_argp = &args,
d45b2989 4252 .rpc_resp = &res,
1da177e4
LT		 4253 };
4254
4255 /* None of the pathconf attributes are mandatory to implement */
4256 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4257 memset(pathconf, 0, sizeof(*pathconf));
4258 return 0;
4259 }
4260
0e574af1 4261 nfs_fattr_init(pathconf->fattr);
7c513058 4262 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4263}
4264
4265static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4266 struct nfs_pathconf *pathconf)
4267{
4268 struct nfs4_exception exception = { };
4269 int err;
4270
4271 do {
4272 err = nfs4_handle_exception(server,
4273 _nfs4_proc_pathconf(server, fhandle, pathconf),
4274 &exception);
4275 } while (exception.retry);
4276 return err;
4277}
4278
5521abfd 4279int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4280 const struct nfs_open_context *ctx,
4281 const struct nfs_lock_context *l_ctx,
4282 fmode_t fmode)
4283{
4284 const struct nfs_lockowner *lockowner = NULL;
4285
4286 if (l_ctx != NULL)
4287 lockowner = &l_ctx->lockowner;
5521abfd 4288 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4289}
4290EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4291
5521abfd
TM		 4292static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4293 const struct nfs_open_context *ctx,
4294 const struct nfs_lock_context *l_ctx,
4295 fmode_t fmode)
4296{
4297 nfs4_stateid current_stateid;
4298
e1253be0
TM		 4299 /* If the current stateid represents a lost lock, then exit */
4300 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4301 return true;
5521abfd
TM		 4302 return nfs4_stateid_match(stateid, &current_stateid);
4303}
4304
4305static bool nfs4_error_stateid_expired(int err)
4306{
4307 switch (err) {
4308 case -NFS4ERR_DELEG_REVOKED:
4309 case -NFS4ERR_ADMIN_REVOKED:
4310 case -NFS4ERR_BAD_STATEID:
4311 case -NFS4ERR_STALE_STATEID:
4312 case -NFS4ERR_OLD_STATEID:
4313 case -NFS4ERR_OPENMODE:
4314 case -NFS4ERR_EXPIRED:
4315 return true;
4316 }
4317 return false;
4318}
4319
d45f60c6 4320void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4321{
d45f60c6 4322 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4323}
4324
d45f60c6 4325static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4326{
d45f60c6 4327 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4328
d45f60c6
WAA		 4329 trace_nfs4_read(hdr, task->tk_status);
4330 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4331 hdr->args.context->state,
4332 NULL) == -EAGAIN) {
d00c5d43 4333 rpc_restart_call_prepare(task);
ec06c096 4334 return -EAGAIN;
1da177e4 4335 }
8850df99 4336
d45f60c6 4337 __nfs4_read_done_cb(hdr);
1da177e4 4338 if (task->tk_status > 0)
d45f60c6 4339 renew_lease(server, hdr->timestamp);
ec06c096 4340 return 0;
1da177e4
LT		 4341}
4342
5521abfd 4343static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4344 struct nfs_pgio_args *args)
5521abfd
TM		 4345{
4346
4347 if (!nfs4_error_stateid_expired(task->tk_status) ||
4348 nfs4_stateid_is_current(&args->stateid,
4349 args->context,
4350 args->lock_context,
4351 FMODE_READ))
4352 return false;
4353 rpc_restart_call_prepare(task);
4354 return true;
4355}
4356
d45f60c6 4357static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4358{
4359
4360 dprintk("--> %s\n", __func__);
4361
d45f60c6 4362 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4363 return -EAGAIN;
d45f60c6 4364 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4365 return -EAGAIN;
d45f60c6
WAA		 4366 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4367 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4368}
4369
d45f60c6
WAA		 4370static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4371 struct rpc_message *msg)
1da177e4 4372{
d45f60c6
WAA		 4373 hdr->timestamp = jiffies;
4374 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4375 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4376 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4377}
4378
d45f60c6
WAA		 4379static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4380 struct nfs_pgio_header *hdr)
ea7c3303 4381{
d45f60c6
WAA		 4382 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4383 &hdr->args.seq_args,
4384 &hdr->res.seq_res,
9b206149 4385 task))
ef1820f9 4386 return 0;
d45f60c6
WAA		 4387 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4388 hdr->args.lock_context,
4389 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4390 return -EIO;
d45f60c6 4391 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4392 return -EIO;
4393 return 0;
1da177e4
LT		 4394}
4395
d45f60c6
WAA		 4396static int nfs4_write_done_cb(struct rpc_task *task,
4397 struct nfs_pgio_header *hdr)
1da177e4 4398{
d45f60c6 4399 struct inode *inode = hdr->inode;
8478eaa1 4400
d45f60c6
WAA		 4401 trace_nfs4_write(hdr, task->tk_status);
4402 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4403 hdr->args.context->state,
4404 NULL) == -EAGAIN) {
d00c5d43 4405 rpc_restart_call_prepare(task);
788e7a89 4406 return -EAGAIN;
1da177e4 4407 }
4f9838c7 4408 if (task->tk_status >= 0) {
d45f60c6 4409 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4410 nfs_writeback_update_inode(hdr);
4f9838c7 4411 }
788e7a89 4412 return 0;
1da177e4
LT		 4413}
4414
5521abfd 4415static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4416 struct nfs_pgio_args *args)
5521abfd
TM		 4417{
4418
4419 if (!nfs4_error_stateid_expired(task->tk_status) ||
4420 nfs4_stateid_is_current(&args->stateid,
4421 args->context,
4422 args->lock_context,
4423 FMODE_WRITE))
4424 return false;
4425 rpc_restart_call_prepare(task);
4426 return true;
4427}
4428
d45f60c6 4429static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4430{
d45f60c6 4431 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4432 return -EAGAIN;
d45f60c6 4433 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4434 return -EAGAIN;
d45f60c6
WAA		 4435 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4436 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4437}
4438
5a37f851 4439static
d45f60c6 4440bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4441{
5a37f851 4442 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4443 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4444 return false;
4445 /* Otherwise, request attributes if and only if we don't hold
4446 * a delegation
4447 */
011e2a7f 4448 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4449}
a69aef14 4450
d45f60c6
WAA		 4451static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4452 struct rpc_message *msg)
1da177e4 4453{
d45f60c6 4454 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4455
d45f60c6
WAA		 4456 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4457 hdr->args.bitmask = NULL;
4458 hdr->res.fattr = NULL;
7ffd1064 4459 } else
d45f60c6 4460 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4461
d45f60c6
WAA		 4462 if (!hdr->pgio_done_cb)
4463 hdr->pgio_done_cb = nfs4_write_done_cb;
4464 hdr->res.server = server;
4465 hdr->timestamp = jiffies;
1da177e4 4466
bdc7f021 4467 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4468 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4469}
4470
0b7c0153 4471static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4472{
d9afbd1b
TM		 4473 nfs4_setup_sequence(NFS_SERVER(data->inode),
4474 &data->args.seq_args,
4475 &data->res.seq_res,
4476 task);
1da177e4
LT		 4477}
4478
0b7c0153 4479static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4480{
1da177e4 4481 struct inode *inode = data->inode;
14516c3a 4482
cc668ab3 4483 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4484 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4485 NULL, NULL) == -EAGAIN) {
d00c5d43 4486 rpc_restart_call_prepare(task);
788e7a89 4487 return -EAGAIN;
1da177e4 4488 }
788e7a89 4489 return 0;
1da177e4
LT		 4490}
4491
0b7c0153 4492static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4493{
4494 if (!nfs4_sequence_done(task, &data->res.seq_res))
4495 return -EAGAIN;
0b7c0153 4496 return data->commit_done_cb(task, data);
5f452431
FI		 4497}
4498
0b7c0153 4499static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4500{
788e7a89 4501 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4502
0b7c0153
FI		 4503 if (data->commit_done_cb == NULL)
4504 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4505 data->res.server = server;
bdc7f021 4506 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4507 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4508}
4509
9bc4e3ca
CL		 4510struct nfs4_renewdata {
4511 struct nfs_client *client;
4512 unsigned long timestamp;
4513};
4514
1da177e4
LT		 4515/*
4516 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4517 * standalone procedure for queueing an asynchronous RENEW.
4518 */
9bc4e3ca 4519static void nfs4_renew_release(void *calldata)
dc96aef9 4520{
9bc4e3ca
CL		 4521 struct nfs4_renewdata *data = calldata;
4522 struct nfs_client *clp = data->client;
dc96aef9 4523
0851de06
AB		 4524 if (atomic_read(&clp->cl_count) > 1)
4525 nfs4_schedule_state_renewal(clp);
4526 nfs_put_client(clp);
9bc4e3ca 4527 kfree(data);
dc96aef9
AB		 4528}
4529
9bc4e3ca 4530static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4531{
9bc4e3ca
CL		 4532 struct nfs4_renewdata *data = calldata;
4533 struct nfs_client *clp = data->client;
4534 unsigned long timestamp = data->timestamp;
1da177e4 4535
c6d01c6f 4536 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4537 switch (task->tk_status) {
4538 case 0:
4539 break;
4540 case -NFS4ERR_LEASE_MOVED:
4541 nfs4_schedule_lease_moved_recovery(clp);
4542 break;
4543 default:
95baa25c 4544 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4545 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4546 return;
4547 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4548 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4549 return;
4550 }
4551 nfs4_schedule_path_down_recovery(clp);
1da177e4 4552 }
452e9352 4553 do_renew_lease(clp, timestamp);
1da177e4
LT		 4554}
4555
963d8fe5
TM		 4556static const struct rpc_call_ops nfs4_renew_ops = {
4557 .rpc_call_done = nfs4_renew_done,
dc96aef9 4558 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4559};
4560
2f60ea6b 4561static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4562{
4563 struct rpc_message msg = {
4564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4565 .rpc_argp = clp,
b4454fe1 4566 .rpc_cred = cred,
1da177e4 4567 };
9bc4e3ca 4568 struct nfs4_renewdata *data;
1da177e4 4569
2f60ea6b
TM		 4570 if (renew_flags == 0)
4571 return 0;
0851de06
AB		 4572 if (!atomic_inc_not_zero(&clp->cl_count))
4573 return -EIO;
b569ad34 4574 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4575 if (data == NULL)
4576 return -ENOMEM;
4577 data->client = clp;
4578 data->timestamp = jiffies;
bc7a05ca 4579 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4580 &nfs4_renew_ops, data);
1da177e4
LT		 4581}
4582
8534d4ec 4583static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4584{
4585 struct rpc_message msg = {
4586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4587 .rpc_argp = clp,
b4454fe1 4588 .rpc_cred = cred,
1da177e4
LT		 4589 };
4590 unsigned long now = jiffies;
4591 int status;
4592
bc7a05ca 4593 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4594 if (status < 0)
4595 return status;
452e9352 4596 do_renew_lease(clp, now);
1da177e4
LT		 4597 return 0;
4598}
4599
aa1870af
BF		 4600static inline int nfs4_server_supports_acls(struct nfs_server *server)
4601{
7dd7d959 4602 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4603}
4604
21f498c2
TM		 4605/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4606 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4607 * the stack.
4608 */
21f498c2 4609#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4610
e9e3d724 4611static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4612 struct page **pages)
e9e3d724
NH		 4613{
4614 struct page *newpage, **spages;
4615 int rc = 0;
4616 size_t len;
4617 spages = pages;
4618
4619 do {
21f498c2 4620 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4621 newpage = alloc_page(GFP_KERNEL);
4622
4623 if (newpage == NULL)
4624 goto unwind;
4625 memcpy(page_address(newpage), buf, len);
4626 buf += len;
4627 buflen -= len;
4628 *pages++ = newpage;
4629 rc++;
4630 } while (buflen != 0);
4631
4632 return rc;
4633
4634unwind:
4635 for(; rc > 0; rc--)
4636 __free_page(spages[rc-1]);
4637 return -ENOMEM;
4638}
4639
e50a1c2e
BF		 4640struct nfs4_cached_acl {
4641 int cached;
4642 size_t len;
3e9d4154 4643 char data[0];
e50a1c2e
BF		 4644};
4645
4646static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4647{
4648 struct nfs_inode *nfsi = NFS_I(inode);
4649
4650 spin_lock(&inode->i_lock);
4651 kfree(nfsi->nfs4_acl);
4652 nfsi->nfs4_acl = acl;
4653 spin_unlock(&inode->i_lock);
4654}
4655
4656static void nfs4_zap_acl_attr(struct inode *inode)
4657{
4658 nfs4_set_cached_acl(inode, NULL);
4659}
4660
4661static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4662{
4663 struct nfs_inode *nfsi = NFS_I(inode);
4664 struct nfs4_cached_acl *acl;
4665 int ret = -ENOENT;
4666
4667 spin_lock(&inode->i_lock);
4668 acl = nfsi->nfs4_acl;
4669 if (acl == NULL)
4670 goto out;
4671 if (buf == NULL) /* user is just asking for length */
4672 goto out_len;
4673 if (acl->cached == 0)
4674 goto out;
4675 ret = -ERANGE; /* see getxattr(2) man page */
4676 if (acl->len > buflen)
4677 goto out;
4678 memcpy(buf, acl->data, acl->len);
4679out_len:
4680 ret = acl->len;
4681out:
4682 spin_unlock(&inode->i_lock);
4683 return ret;
4684}
4685
5794d21e 4686static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4687{
4688 struct nfs4_cached_acl *acl;
b291f1b1 4689 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4690
1f1ea6c2 4691 if (buflen <= PAGE_SIZE) {
b291f1b1 4692 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4693 if (acl == NULL)
4694 goto out;
4695 acl->cached = 1;
5794d21e 4696 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4697 } else {
4698 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4699 if (acl == NULL)
4700 goto out;
4701 acl->cached = 0;
4702 }
4703 acl->len = acl_len;
4704out:
4705 nfs4_set_cached_acl(inode, acl);
4706}
4707
bf118a34
AA		 4708/*
4709 * The getxattr API returns the required buffer length when called with a
4710 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4711 * the required buf. On a NULL buf, we send a page of data to the server
4712 * guessing that the ACL request can be serviced by a page. If so, we cache
4713 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4714 * the cache. If not so, we throw away the page, and cache the required
4715 * length. The next getxattr call will then produce another round trip to
4716 * the server, this time with the input buf of the required size.
4717 */
16b4289c 4718static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4719{
bf118a34 4720 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4721 struct nfs_getaclargs args = {
4722 .fh = NFS_FH(inode),
4723 .acl_pages = pages,
4724 .acl_len = buflen,
4725 };
663c79b3
BH		 4726 struct nfs_getaclres res = {
4727 .acl_len = buflen,
4728 };
aa1870af
BF		 4729 struct rpc_message msg = {
4730 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4731 .rpc_argp = &args,
663c79b3 4732 .rpc_resp = &res,
aa1870af 4733 };
21f498c2
TM		 4734 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4735 int ret = -ENOMEM, i;
aa1870af 4736
bf118a34
AA		 4737 /* As long as we're doing a round trip to the server anyway,
4738 * let's be prepared for a page of acl data. */
4739 if (npages == 0)
4740 npages = 1;
21f498c2
TM		 4741 if (npages > ARRAY_SIZE(pages))
4742 return -ERANGE;
5a006899 4743
bf118a34
AA		 4744 for (i = 0; i < npages; i++) {
4745 pages[i] = alloc_page(GFP_KERNEL);
4746 if (!pages[i])
4747 goto out_free;
e50a1c2e 4748 }
5a006899
SP		 4749
4750 /* for decoding across pages */
4751 res.acl_scratch = alloc_page(GFP_KERNEL);
4752 if (!res.acl_scratch)
4753 goto out_free;
4754
bf118a34 4755 args.acl_len = npages * PAGE_SIZE;
5a006899 4756
de040bec 4757 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4758 __func__, buf, buflen, npages, args.acl_len);
4759 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4760 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4761 if (ret)
4762 goto out_free;
bf118a34 4763
1f1ea6c2
TM		 4764 /* Handle the case where the passed-in buffer is too short */
4765 if (res.acl_flags & NFS4_ACL_TRUNC) {
4766 /* Did the user only issue a request for the acl length? */
4767 if (buf == NULL)
4768 goto out_ok;
e50a1c2e 4769 ret = -ERANGE;
1f1ea6c2 4770 goto out_free;
e50a1c2e 4771 }
1f1ea6c2 4772 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4773 if (buf) {
4774 if (res.acl_len > buflen) {
4775 ret = -ERANGE;
4776 goto out_free;
4777 }
1f1ea6c2 4778 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4779 }
1f1ea6c2
TM		 4780out_ok:
4781 ret = res.acl_len;
e50a1c2e 4782out_free:
bf118a34
AA		 4783 for (i = 0; i < npages; i++)
4784 if (pages[i])
4785 __free_page(pages[i]);
331818f1
TM		 4786 if (res.acl_scratch)
4787 __free_page(res.acl_scratch);
aa1870af
BF		 4788 return ret;
4789}
4790
16b4289c
TM		 4791static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4792{
4793 struct nfs4_exception exception = { };
4794 ssize_t ret;
4795 do {
4796 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4797 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4798 if (ret >= 0)
4799 break;
4800 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4801 } while (exception.retry);
4802 return ret;
4803}
4804
e50a1c2e
BF		 4805static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4806{
4807 struct nfs_server *server = NFS_SERVER(inode);
4808 int ret;
4809
4810 if (!nfs4_server_supports_acls(server))
4811 return -EOPNOTSUPP;
4812 ret = nfs_revalidate_inode(server, inode);
4813 if (ret < 0)
4814 return ret;
08a22b39
AK		 4815 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4816 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4817 ret = nfs4_read_cached_acl(inode, buf, buflen);
4818 if (ret != -ENOENT)
bf118a34
AA		 4819 /* -ENOENT is returned if there is no ACL or if there is an ACL
4820 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4821 return ret;
4822 return nfs4_get_acl_uncached(inode, buf, buflen);
4823}
4824
16b4289c 4825static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4826{
4827 struct nfs_server *server = NFS_SERVER(inode);
4828 struct page *pages[NFS4ACL_MAXPAGES];
4829 struct nfs_setaclargs arg = {
4830 .fh = NFS_FH(inode),
4831 .acl_pages = pages,
4832 .acl_len = buflen,
4833 };
73c403a9 4834 struct nfs_setaclres res;
4b580ee3
BF		 4835 struct rpc_message msg = {
4836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4837 .rpc_argp = &arg,
73c403a9 4838 .rpc_resp = &res,
4b580ee3 4839 };
21f498c2 4840 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4841 int ret, i;
4b580ee3
BF		 4842
4843 if (!nfs4_server_supports_acls(server))
4844 return -EOPNOTSUPP;
21f498c2
TM		 4845 if (npages > ARRAY_SIZE(pages))
4846 return -ERANGE;
8fbcf237 4847 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4848 if (i < 0)
4849 return i;
57ec14c5 4850 nfs4_inode_return_delegation(inode);
7c513058 4851 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4852
4853 /*
4854 * Free each page after tx, so the only ref left is
4855 * held by the network stack
4856 */
4857 for (; i > 0; i--)
4858 put_page(pages[i-1]);
4859
08a22b39
AK		 4860 /*
4861 * Acl update can result in inode attribute update.
4862 * so mark the attribute cache invalid.
4863 */
4864 spin_lock(&inode->i_lock);
4865 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4866 spin_unlock(&inode->i_lock);
f41f7418
TM		 4867 nfs_access_zap_cache(inode);
4868 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4869 return ret;
4870}
4871
16b4289c
TM		 4872static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4873{
4874 struct nfs4_exception exception = { };
4875 int err;
4876 do {
c1578b76
TM		 4877 err = __nfs4_proc_set_acl(inode, buf, buflen);
4878 trace_nfs4_set_acl(inode, err);
4879 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4880 &exception);
4881 } while (exception.retry);
4882 return err;
4883}
4884
aa9c2669
DQ		 4885#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4886static int _nfs4_get_security_label(struct inode *inode, void *buf,
4887 size_t buflen)
4888{
4889 struct nfs_server *server = NFS_SERVER(inode);
4890 struct nfs_fattr fattr;
4891 struct nfs4_label label = {0, 0, buflen, buf};
4892
4893 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4894 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4895 .fh = NFS_FH(inode),
4896 .bitmask = bitmask,
4897 };
4898 struct nfs4_getattr_res res = {
4899 .fattr = &fattr,
4900 .label = &label,
4901 .server = server,
4902 };
4903 struct rpc_message msg = {
4904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4905 .rpc_argp = &arg,
aa9c2669
DQ		 4906 .rpc_resp = &res,
4907 };
4908 int ret;
4909
4910 nfs_fattr_init(&fattr);
4911
fcb63a9b 4912 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4913 if (ret)
4914 return ret;
4915 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4916 return -ENOENT;
4917 if (buflen < label.len)
4918 return -ERANGE;
4919 return 0;
4920}
4921
4922static int nfs4_get_security_label(struct inode *inode, void *buf,
4923 size_t buflen)
4924{
4925 struct nfs4_exception exception = { };
4926 int err;
4927
4928 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4929 return -EOPNOTSUPP;
4930
4931 do {
c1578b76
TM		 4932 err = _nfs4_get_security_label(inode, buf, buflen);
4933 trace_nfs4_get_security_label(inode, err);
4934 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4935 &exception);
4936 } while (exception.retry);
4937 return err;
4938}
4939
4940static int _nfs4_do_set_security_label(struct inode *inode,
4941 struct nfs4_label *ilabel,
4942 struct nfs_fattr *fattr,
4943 struct nfs4_label *olabel)
4944{
4945
4946 struct iattr sattr = {0};
4947 struct nfs_server *server = NFS_SERVER(inode);
4948 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4949 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4950 .fh = NFS_FH(inode),
4951 .iap = &sattr,
4952 .server = server,
4953 .bitmask = bitmask,
4954 .label = ilabel,
4955 };
4956 struct nfs_setattrres res = {
4957 .fattr = fattr,
4958 .label = olabel,
4959 .server = server,
4960 };
4961 struct rpc_message msg = {
4962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4963 .rpc_argp = &arg,
aa9c2669
DQ		 4964 .rpc_resp = &res,
4965 };
4966 int status;
4967
12207f69 4968 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4969
12207f69 4970 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4971 if (status)
4972 dprintk("%s failed: %d\n", __func__, status);
4973
4974 return status;
4975}
4976
4977static int nfs4_do_set_security_label(struct inode *inode,
4978 struct nfs4_label *ilabel,
4979 struct nfs_fattr *fattr,
4980 struct nfs4_label *olabel)
4981{
4982 struct nfs4_exception exception = { };
4983 int err;
4984
4985 do {
c1578b76
TM		 4986 err = _nfs4_do_set_security_label(inode, ilabel,
4987 fattr, olabel);
4988 trace_nfs4_set_security_label(inode, err);
4989 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4990 &exception);
4991 } while (exception.retry);
4992 return err;
4993}
4994
4995static int
4996nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4997{
4998 struct nfs4_label ilabel, *olabel = NULL;
4999 struct nfs_fattr fattr;
5000 struct rpc_cred *cred;
2b0143b5 5001 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 5002 int status;
5003
5004 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5005 return -EOPNOTSUPP;
5006
5007 nfs_fattr_init(&fattr);
5008
5009 ilabel.pi = 0;
5010 ilabel.lfs = 0;
5011 ilabel.label = (char *)buf;
5012 ilabel.len = buflen;
5013
5014 cred = rpc_lookup_cred();
5015 if (IS_ERR(cred))
5016 return PTR_ERR(cred);
5017
5018 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5019 if (IS_ERR(olabel)) {
5020 status = -PTR_ERR(olabel);
5021 goto out;
5022 }
5023
5024 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5025 if (status == 0)
5026 nfs_setsecurity(inode, &fattr, olabel);
5027
5028 nfs4_label_free(olabel);
5029out:
5030 put_rpccred(cred);
5031 return status;
5032}
5033#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5034
5035
f092075d
CL		 5036static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5037 nfs4_verifier *bootverf)
cd93710e
CL		 5038{
5039 __be32 verf[2];
5040
2c820d9a
CL		 5041 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5042 /* An impossible timestamp guarantees this value
5043 * will never match a generated boot time. */
5044 verf[0] = 0;
17f26b12 5045 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5046 } else {
f092075d 5047 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5048 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5049 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5050 }
cd93710e
CL		 5051 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5052}
5053
a3192688
JL		 5054static int
5055nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5056{
a3192688
JL		 5057 size_t len;
5058 char *str;
e984a55a 5059
ceb3a16c 5060 if (clp->cl_owner_id != NULL)
a3192688 5061 return 0;
4a3e5779 5062
a3192688 5063 rcu_read_lock();
4a70316c 5064 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5065 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5066 1 +
5067 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5068 1;
5069 rcu_read_unlock();
5070
5071 if (len > NFS4_OPAQUE_LIMIT + 1)
5072 return -EINVAL;
5073
5074 /*
5075 * Since this string is allocated at mount time, and held until the
5076 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5077 * about a memory-reclaim deadlock.
5078 */
5079 str = kmalloc(len, GFP_KERNEL);
5080 if (!str)
5081 return -ENOMEM;
ceb3a16c 5082
e984a55a 5083 rcu_read_lock();
f2dd436e 5084 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5085 clp->cl_ipaddr,
5086 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5087 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5088 rcu_read_unlock();
a3192688 5089
a3192688
JL		 5090 clp->cl_owner_id = str;
5091 return 0;
e984a55a
CL		 5092}
5093
873e3851
JL		 5094static int
5095nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5096{
873e3851
JL		 5097 size_t len;
5098 char *str;
5099
5100 len = 10 + 10 + 1 + 10 + 1 +
5101 strlen(nfs4_client_id_uniquifier) + 1 +
5102 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5103
5104 if (len > NFS4_OPAQUE_LIMIT + 1)
5105 return -EINVAL;
5106
5107 /*
5108 * Since this string is allocated at mount time, and held until the
5109 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5110 * about a memory-reclaim deadlock.
5111 */
5112 str = kmalloc(len, GFP_KERNEL);
5113 if (!str)
5114 return -ENOMEM;
5115
f2dd436e 5116 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5117 clp->rpc_ops->version, clp->cl_minorversion,
5118 nfs4_client_id_uniquifier,
5119 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5120 clp->cl_owner_id = str;
5121 return 0;
5122}
5123
5124static int
5125nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5126{
873e3851
JL		 5127 size_t len;
5128 char *str;
ceb3a16c
TM		 5129
5130 if (clp->cl_owner_id != NULL)
873e3851 5131 return 0;
6f2ea7f2
CL		 5132
5133 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5134 return nfs4_init_uniquifier_client_string(clp);
5135
5136 len = 10 + 10 + 1 + 10 + 1 +
5137 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5138
5139 if (len > NFS4_OPAQUE_LIMIT + 1)
5140 return -EINVAL;
5141
5142 /*
5143 * Since this string is allocated at mount time, and held until the
5144 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5145 * about a memory-reclaim deadlock.
5146 */
5147 str = kmalloc(len, GFP_KERNEL);
5148 if (!str)
5149 return -ENOMEM;
5150
f2dd436e 5151 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5152 clp->rpc_ops->version, clp->cl_minorversion,
5153 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5154 clp->cl_owner_id = str;
5155 return 0;
e984a55a
CL		 5156}
5157
706cb8db
CL		 5158/*
5159 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5160 * services. Advertise one based on the address family of the
5161 * clientaddr.
5162 */
5163static unsigned int
5164nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5165{
5166 if (strchr(clp->cl_ipaddr, ':') != NULL)
5167 return scnprintf(buf, len, "tcp6");
5168 else
5169 return scnprintf(buf, len, "tcp");
5170}
5171
f11b2a1c
JL		 5172static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5173{
5174 struct nfs4_setclientid *sc = calldata;
5175
5176 if (task->tk_status == 0)
5177 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5178}
5179
5180static const struct rpc_call_ops nfs4_setclientid_ops = {
5181 .rpc_call_done = nfs4_setclientid_done,
5182};
5183
6bbb4ae8
CL		 5184/**
5185 * nfs4_proc_setclientid - Negotiate client ID
5186 * @clp: state data structure
5187 * @program: RPC program for NFSv4 callback service
5188 * @port: IP port number for NFS4 callback service
5189 * @cred: RPC credential to use for this call
5190 * @res: where to place the result
5191 *
5192 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5193 */
bb8b27e5
TM		 5194int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5195 unsigned short port, struct rpc_cred *cred,
5196 struct nfs4_setclientid_res *res)
1da177e4
LT		 5197{
5198 nfs4_verifier sc_verifier;
5199 struct nfs4_setclientid setclientid = {
5200 .sc_verifier = &sc_verifier,
5201 .sc_prog = program,
3a6bb738 5202 .sc_clnt = clp,
1da177e4
LT		 5203 };
5204 struct rpc_message msg = {
5205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5206 .rpc_argp = &setclientid,
bb8b27e5 5207 .rpc_resp = res,
286d7d6a 5208 .rpc_cred = cred,
1da177e4 5209 };
f11b2a1c
JL		 5210 struct rpc_task *task;
5211 struct rpc_task_setup task_setup_data = {
5212 .rpc_client = clp->cl_rpcclient,
5213 .rpc_message = &msg,
5214 .callback_ops = &nfs4_setclientid_ops,
5215 .callback_data = &setclientid,
5216 .flags = RPC_TASK_TIMEOUT,
5217 };
6bbb4ae8 5218 int status;
1da177e4 5219
de734831 5220 /* nfs_client_id4 */
f092075d 5221 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5222
5223 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5224 status = nfs4_init_uniform_client_string(clp);
5225 else
a3192688 5226 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5227
5228 if (status)
5229 goto out;
3a6bb738 5230
de734831 5231 /* cb_client4 */
706cb8db
CL		 5232 setclientid.sc_netid_len =
5233 nfs4_init_callback_netid(clp,
5234 setclientid.sc_netid,
5235 sizeof(setclientid.sc_netid));
de734831 5236 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5237 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5238 clp->cl_ipaddr, port >> 8, port & 255);
5239
3a6bb738 5240 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5241 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5242 clp->cl_owner_id);
f11b2a1c
JL		 5243 task = rpc_run_task(&task_setup_data);
5244 if (IS_ERR(task)) {
5245 status = PTR_ERR(task);
5246 goto out;
5247 }
5248 status = task->tk_status;
5249 if (setclientid.sc_cred) {
5250 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5251 put_rpccred(setclientid.sc_cred);
5252 }
5253 rpc_put_task(task);
5254out:
c6d01c6f 5255 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5256 dprintk("NFS reply setclientid: %d\n", status);
5257 return status;
1da177e4
LT		 5258}
5259
6bbb4ae8
CL		 5260/**
5261 * nfs4_proc_setclientid_confirm - Confirm client ID
5262 * @clp: state data structure
5263 * @res: result of a previous SETCLIENTID
5264 * @cred: RPC credential to use for this call
5265 *
5266 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5267 */
fd954ae1 5268int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5269 struct nfs4_setclientid_res *arg,
5270 struct rpc_cred *cred)
1da177e4 5271{
1da177e4
LT		 5272 struct rpc_message msg = {
5273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5274 .rpc_argp = arg,
286d7d6a 5275 .rpc_cred = cred,
1da177e4 5276 };
1da177e4
LT		 5277 int status;
5278
6bbb4ae8
CL		 5279 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5280 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5281 clp->cl_clientid);
1bd714f2 5282 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5283 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5284 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5285 return status;
5286}
5287
fe650407
TM		 5288struct nfs4_delegreturndata {
5289 struct nfs4_delegreturnargs args;
fa178f29 5290 struct nfs4_delegreturnres res;
fe650407
TM		 5291 struct nfs_fh fh;
5292 nfs4_stateid stateid;
26e976a8 5293 unsigned long timestamp;
fa178f29 5294 struct nfs_fattr fattr;
fe650407 5295 int rpc_status;
039b756a
PT		 5296 struct inode *inode;
5297 bool roc;
5298 u32 roc_barrier;
fe650407
TM		 5299};
5300
fe650407
TM		 5301static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5302{
5303 struct nfs4_delegreturndata *data = calldata;
938e1010 5304
14516c3a
TM		 5305 if (!nfs4_sequence_done(task, &data->res.seq_res))
5306 return;
938e1010 5307
ca8acf8d 5308 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5309 switch (task->tk_status) {
79708861 5310 case 0:
fa178f29 5311 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5312 case -NFS4ERR_ADMIN_REVOKED:
5313 case -NFS4ERR_DELEG_REVOKED:
5314 case -NFS4ERR_BAD_STATEID:
5315 case -NFS4ERR_OLD_STATEID:
5316 case -NFS4ERR_STALE_STATEID:
5317 case -NFS4ERR_EXPIRED:
5318 task->tk_status = 0;
039b756a
PT		 5319 if (data->roc)
5320 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5321 break;
79708861 5322 default:
8478eaa1
N		 5323 if (nfs4_async_handle_error(task, data->res.server,
5324 NULL, NULL) == -EAGAIN) {
d00c5d43 5325 rpc_restart_call_prepare(task);
79708861
RL		 5326 return;
5327 }
5328 }
5329 data->rpc_status = task->tk_status;
fe650407
TM		 5330}
5331
5332static void nfs4_delegreturn_release(void *calldata)
5333{
039b756a 5334 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5335 struct inode *inode = data->inode;
039b756a 5336
ea7c38fe
TM		 5337 if (inode) {
5338 if (data->roc)
5339 pnfs_roc_release(inode);
5340 nfs_iput_and_deactive(inode);
5341 }
fe650407
TM		 5342 kfree(calldata);
5343}
5344
938e1010
AA		 5345static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5346{
5347 struct nfs4_delegreturndata *d_data;
5348
5349 d_data = (struct nfs4_delegreturndata *)data;
5350
500d701f
PT		 5351 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5352 return;
5353
4ff376fe
TM		 5354 if (d_data->roc)
5355 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5356
d9afbd1b
TM		 5357 nfs4_setup_sequence(d_data->res.server,
5358 &d_data->args.seq_args,
5359 &d_data->res.seq_res,
5360 task);
938e1010 5361}
938e1010 5362
c8d149f3 5363static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5364 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5365 .rpc_call_done = nfs4_delegreturn_done,
5366 .rpc_release = nfs4_delegreturn_release,
5367};
5368
e6f81075 5369static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5370{
5371 struct nfs4_delegreturndata *data;
fa178f29 5372 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5373 struct rpc_task *task;
5138fde0
TM		 5374 struct rpc_message msg = {
5375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5376 .rpc_cred = cred,
5377 };
c970aa85
TM		 5378 struct rpc_task_setup task_setup_data = {
5379 .rpc_client = server->client,
5138fde0 5380 .rpc_message = &msg,
c970aa85
TM		 5381 .callback_ops = &nfs4_delegreturn_ops,
5382 .flags = RPC_TASK_ASYNC,
5383 };
e6f81075 5384 int status = 0;
fe650407 5385
8535b2be 5386 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5387 if (data == NULL)
5388 return -ENOMEM;
a9c92d6b 5389 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5390
5391 nfs4_state_protect(server->nfs_client,
5392 NFS_SP4_MACH_CRED_CLEANUP,
5393 &task_setup_data.rpc_client, &msg);
5394
fe650407
TM		 5395 data->args.fhandle = &data->fh;
5396 data->args.stateid = &data->stateid;
9e907fec 5397 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5398 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5399 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5400 data->res.fattr = &data->fattr;
5401 data->res.server = server;
5138fde0 5402 nfs_fattr_init(data->res.fattr);
26e976a8 5403 data->timestamp = jiffies;
fe650407 5404 data->rpc_status = 0;
ea7c38fe
TM		 5405 data->inode = nfs_igrab_and_active(inode);
5406 if (data->inode)
5407 data->roc = nfs4_roc(inode);
fe650407 5408
c970aa85 5409 task_setup_data.callback_data = data;
1174dd1f
TM		 5410 msg.rpc_argp = &data->args;
5411 msg.rpc_resp = &data->res;
c970aa85 5412 task = rpc_run_task(&task_setup_data);
7a1218a2 5413 if (IS_ERR(task))
fe650407 5414 return PTR_ERR(task);
e6f81075
TM		 5415 if (!issync)
5416 goto out;
fe650407 5417 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5418 if (status != 0)
5419 goto out;
5420 status = data->rpc_status;
e144cbcc
TM		 5421 if (status == 0)
5422 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5423 else
5424 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5425out:
e6b3c4db 5426 rpc_put_task(task);
fe650407 5427 return status;
1da177e4
LT		 5428}
5429
e6f81075 5430int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5431{
5432 struct nfs_server *server = NFS_SERVER(inode);
5433 struct nfs4_exception exception = { };
5434 int err;
5435 do {
e6f81075 5436 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5437 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5438 switch (err) {
5439 case -NFS4ERR_STALE_STATEID:
5440 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5441 case 0:
5442 return 0;
5443 }
5444 err = nfs4_handle_exception(server, err, &exception);
5445 } while (exception.retry);
5446 return err;
5447}
5448
5449#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5450#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5451
5452/*
5453 * sleep, with exponential backoff, and retry the LOCK operation.
5454 */
5455static unsigned long
5456nfs4_set_lock_task_retry(unsigned long timeout)
5457{
416ad3c9 5458 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5459 timeout <<= 1;
5460 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5461 return NFS4_LOCK_MAXTIMEOUT;
5462 return timeout;
5463}
5464
1da177e4
LT		 5465static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5466{
5467 struct inode *inode = state->inode;
5468 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5469 struct nfs_client *clp = server->nfs_client;
911d1aaf 5470 struct nfs_lockt_args arg = {
1da177e4 5471 .fh = NFS_FH(inode),
911d1aaf 5472 .fl = request,
1da177e4 5473 };
911d1aaf
TM		 5474 struct nfs_lockt_res res = {
5475 .denied = request,
1da177e4
LT		 5476 };
5477 struct rpc_message msg = {
5478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5479 .rpc_argp = &arg,
5480 .rpc_resp = &res,
5481 .rpc_cred = state->owner->so_cred,
5482 };
1da177e4
LT		 5483 struct nfs4_lock_state *lsp;
5484 int status;
5485
911d1aaf 5486 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5487 status = nfs4_set_lock_state(state, request);
5488 if (status != 0)
5489 goto out;
5490 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5491 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5492 arg.lock_owner.s_dev = server->s_dev;
7c513058 5493 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5494 switch (status) {
5495 case 0:
5496 request->fl_type = F_UNLCK;
5497 break;
5498 case -NFS4ERR_DENIED:
5499 status = 0;
1da177e4 5500 }
70cc6487 5501 request->fl_ops->fl_release_private(request);
a6f951dd 5502 request->fl_ops = NULL;
8d0a8a9d 5503out:
1da177e4
LT		 5504 return status;
5505}
5506
5507static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5508{
5509 struct nfs4_exception exception = { };
5510 int err;
5511
5512 do {
d1b748a5
TM		 5513 err = _nfs4_proc_getlk(state, cmd, request);
5514 trace_nfs4_get_lock(request, state, cmd, err);
5515 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5516 &exception);
5517 } while (exception.retry);
5518 return err;
5519}
5520
83bfff23 5521static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5522{
4f656367 5523 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5524}
5525
faf5f49c 5526struct nfs4_unlockdata {
911d1aaf
TM		 5527 struct nfs_locku_args arg;
5528 struct nfs_locku_res res;
faf5f49c
TM		 5529 struct nfs4_lock_state *lsp;
5530 struct nfs_open_context *ctx;
911d1aaf 5531 struct file_lock fl;
516285eb 5532 struct nfs_server *server;
26e976a8 5533 unsigned long timestamp;
faf5f49c
TM		 5534};
5535
911d1aaf
TM		 5536static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5537 struct nfs_open_context *ctx,
5538 struct nfs4_lock_state *lsp,
5539 struct nfs_seqid *seqid)
5540{
5541 struct nfs4_unlockdata *p;
5542 struct inode *inode = lsp->ls_state->inode;
5543
8535b2be 5544 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5545 if (p == NULL)
5546 return NULL;
5547 p->arg.fh = NFS_FH(inode);
5548 p->arg.fl = &p->fl;
5549 p->arg.seqid = seqid;
c1d51931 5550 p->res.seqid = seqid;
911d1aaf
TM		 5551 p->lsp = lsp;
5552 atomic_inc(&lsp->ls_count);
5553 /* Ensure we don't close file until we're done freeing locks! */
5554 p->ctx = get_nfs_open_context(ctx);
5555 memcpy(&p->fl, fl, sizeof(p->fl));
5556 p->server = NFS_SERVER(inode);
5557 return p;
5558}
5559
06f814a3 5560static void nfs4_locku_release_calldata(void *data)
faf5f49c 5561{
963d8fe5 5562 struct nfs4_unlockdata *calldata = data;
911d1aaf 5563 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5564 nfs4_put_lock_state(calldata->lsp);
5565 put_nfs_open_context(calldata->ctx);
5566 kfree(calldata);
faf5f49c
TM		 5567}
5568
963d8fe5 5569static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5570{
963d8fe5 5571 struct nfs4_unlockdata *calldata = data;
faf5f49c 5572
14516c3a
TM		 5573 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5574 return;
faf5f49c
TM		 5575 switch (task->tk_status) {
5576 case 0:
26e976a8 5577 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5578 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5579 if (nfs4_update_lock_stateid(calldata->lsp,
5580 &calldata->res.stateid))
5581 break;
9e33bed5
TM		 5582 case -NFS4ERR_BAD_STATEID:
5583 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5584 case -NFS4ERR_STALE_STATEID:
5585 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5586 if (!nfs4_stateid_match(&calldata->arg.stateid,
5587 &calldata->lsp->ls_stateid))
5588 rpc_restart_call_prepare(task);
faf5f49c
TM		 5589 break;
5590 default:
8478eaa1
N		 5591 if (nfs4_async_handle_error(task, calldata->server,
5592 NULL, NULL) == -EAGAIN)
d00c5d43 5593 rpc_restart_call_prepare(task);
faf5f49c 5594 }
2b1bc308 5595 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5596}
5597
4ce70ada 5598static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5599{
4ce70ada 5600 struct nfs4_unlockdata *calldata = data;
faf5f49c 5601
911d1aaf 5602 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5603 goto out_wait;
425c1d4e 5604 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5605 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5606 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5607 goto out_no_action;
faf5f49c 5608 }
26e976a8 5609 calldata->timestamp = jiffies;
035168ab 5610 if (nfs4_setup_sequence(calldata->server,
a893693c 5611 &calldata->arg.seq_args,
2240a9e2
TM		 5612 &calldata->res.seq_res,
5613 task) != 0)
5614 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5615 return;
5616out_no_action:
5617 task->tk_action = NULL;
5618out_wait:
5619 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5620}
5621
963d8fe5 5622static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5623 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5624 .rpc_call_done = nfs4_locku_done,
06f814a3 5625 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5626};
5627
a5d16a4d
TM		 5628static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5629 struct nfs_open_context *ctx,
5630 struct nfs4_lock_state *lsp,
5631 struct nfs_seqid *seqid)
5632{
5633 struct nfs4_unlockdata *data;
5138fde0
TM		 5634 struct rpc_message msg = {
5635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5636 .rpc_cred = ctx->cred,
5637 };
c970aa85
TM		 5638 struct rpc_task_setup task_setup_data = {
5639 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5640 .rpc_message = &msg,
c970aa85 5641 .callback_ops = &nfs4_locku_ops,
101070ca 5642 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5643 .flags = RPC_TASK_ASYNC,
5644 };
a5d16a4d 5645
fa940720
WAA		 5646 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5647 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5648
137d6aca
FF		 5649 /* Ensure this is an unlock - when canceling a lock, the
5650 * canceled lock is passed in, and it won't be an unlock.
5651 */
5652 fl->fl_type = F_UNLCK;
5653
a5d16a4d
TM		 5654 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5655 if (data == NULL) {
5656 nfs_free_seqid(seqid);
5657 return ERR_PTR(-ENOMEM);
5658 }
5659
a9c92d6b 5660 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5661 msg.rpc_argp = &data->arg;
5662 msg.rpc_resp = &data->res;
c970aa85
TM		 5663 task_setup_data.callback_data = data;
5664 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5665}
5666
faf5f49c
TM		 5667static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5668{
65b62a29
TM		 5669 struct inode *inode = state->inode;
5670 struct nfs4_state_owner *sp = state->owner;
5671 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5672 struct nfs_seqid *seqid;
1da177e4 5673 struct nfs4_lock_state *lsp;
06f814a3 5674 struct rpc_task *task;
b4019c0e 5675 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5676 int status = 0;
536ff0f8 5677 unsigned char fl_flags = request->fl_flags;
faf5f49c 5678
8d0a8a9d 5679 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5680 /* Unlock _before_ we do the RPC call */
5681 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5682 /* Exclude nfs_delegation_claim_locks() */
5683 mutex_lock(&sp->so_delegreturn_mutex);
5684 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5685 down_read(&nfsi->rwsem);
83bfff23 5686 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5687 up_read(&nfsi->rwsem);
65b62a29 5688 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5689 goto out;
19e03c57
TM		 5690 }
5691 up_read(&nfsi->rwsem);
65b62a29 5692 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5693 if (status != 0)
9b073574
TM		 5694 goto out;
5695 /* Is this a delegated lock? */
8d0a8a9d 5696 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5697 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5698 goto out;
b4019c0e
TM		 5699 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5700 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5701 status = -ENOMEM;
badc76dd 5702 if (IS_ERR(seqid))
9b073574 5703 goto out;
cd3758e3 5704 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5705 status = PTR_ERR(task);
5706 if (IS_ERR(task))
9b073574 5707 goto out;
a5d16a4d 5708 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5709 rpc_put_task(task);
9b073574 5710out:
536ff0f8 5711 request->fl_flags = fl_flags;
d1b748a5 5712 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5713 return status;
5714}
5715
a5d16a4d
TM		 5716struct nfs4_lockdata {
5717 struct nfs_lock_args arg;
5718 struct nfs_lock_res res;
5719 struct nfs4_lock_state *lsp;
5720 struct nfs_open_context *ctx;
5721 struct file_lock fl;
26e976a8 5722 unsigned long timestamp;
a5d16a4d
TM		 5723 int rpc_status;
5724 int cancelled;
66179efe 5725 struct nfs_server *server;
a5d16a4d
TM		 5726};
5727
5728static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5729 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5730 gfp_t gfp_mask)
1da177e4 5731{
a5d16a4d
TM		 5732 struct nfs4_lockdata *p;
5733 struct inode *inode = lsp->ls_state->inode;
1da177e4 5734 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5735 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5736
8535b2be 5737 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5738 if (p == NULL)
5739 return NULL;
5740
5741 p->arg.fh = NFS_FH(inode);
5742 p->arg.fl = &p->fl;
8535b2be 5743 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5744 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5745 goto out_free;
b4019c0e
TM		 5746 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5747 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5748 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5749 goto out_free_seqid;
7539bbab 5750 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5751 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5752 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5753 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5754 p->lsp = lsp;
66179efe 5755 p->server = server;
a5d16a4d
TM		 5756 atomic_inc(&lsp->ls_count);
5757 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5758 get_file(fl->fl_file);
a5d16a4d
TM		 5759 memcpy(&p->fl, fl, sizeof(p->fl));
5760 return p;
2f74c0a0
TM		 5761out_free_seqid:
5762 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5763out_free:
5764 kfree(p);
5765 return NULL;
5766}
5767
5768static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5769{
5770 struct nfs4_lockdata *data = calldata;
5771 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5772
3110ff80 5773 dprintk("%s: begin!\n", __func__);
2f74c0a0 5774 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5775 goto out_wait;
a5d16a4d 5776 /* Do we need to do an open_to_lock_owner? */
6b447539 5777 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5778 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5779 goto out_release_lock_seqid;
8fe72bac 5780 }
425c1d4e
TM		 5781 nfs4_stateid_copy(&data->arg.open_stateid,
5782 &state->open_stateid);
a5d16a4d 5783 data->arg.new_lock_owner = 1;
c1d51931 5784 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5785 } else {
2f74c0a0 5786 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5787 nfs4_stateid_copy(&data->arg.lock_stateid,
5788 &data->lsp->ls_stateid);
5789 }
5d422301
TM		 5790 if (!nfs4_valid_open_stateid(state)) {
5791 data->rpc_status = -EBADF;
5792 task->tk_action = NULL;
5793 goto out_release_open_seqid;
5794 }
26e976a8 5795 data->timestamp = jiffies;
035168ab
TM		 5796 if (nfs4_setup_sequence(data->server,
5797 &data->arg.seq_args,
2240a9e2 5798 &data->res.seq_res,
d9afbd1b 5799 task) == 0)
66179efe 5800 return;
5d422301 5801out_release_open_seqid:
2240a9e2
TM		 5802 nfs_release_seqid(data->arg.open_seqid);
5803out_release_lock_seqid:
5804 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5805out_wait:
5806 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5807 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5808}
5809
a5d16a4d
TM		 5810static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5811{
5812 struct nfs4_lockdata *data = calldata;
39071e6f 5813 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5814
3110ff80 5815 dprintk("%s: begin!\n", __func__);
a5d16a4d 5816
14516c3a
TM		 5817 if (!nfs4_sequence_done(task, &data->res.seq_res))
5818 return;
66179efe 5819
a5d16a4d 5820 data->rpc_status = task->tk_status;
425c1d4e
TM		 5821 switch (task->tk_status) {
5822 case 0:
2b0143b5 5823 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5824 data->timestamp);
c69899a1
TM		 5825 if (data->arg.new_lock) {
5826 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5827 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5828 rpc_restart_call_prepare(task);
5829 break;
5830 }
5831 }
39071e6f
TM		 5832 if (data->arg.new_lock_owner != 0) {
5833 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5834 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5835 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5836 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5837 rpc_restart_call_prepare(task);
425c1d4e
TM		 5838 break;
5839 case -NFS4ERR_BAD_STATEID:
5840 case -NFS4ERR_OLD_STATEID:
5841 case -NFS4ERR_STALE_STATEID:
5842 case -NFS4ERR_EXPIRED:
5843 if (data->arg.new_lock_owner != 0) {
5844 if (!nfs4_stateid_match(&data->arg.open_stateid,
5845 &lsp->ls_state->open_stateid))
5846 rpc_restart_call_prepare(task);
5847 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5848 &lsp->ls_stateid))
5849 rpc_restart_call_prepare(task);
a5d16a4d 5850 }
3110ff80 5851 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5852}
5853
5854static void nfs4_lock_release(void *calldata)
5855{
5856 struct nfs4_lockdata *data = calldata;
5857
3110ff80 5858 dprintk("%s: begin!\n", __func__);
2f74c0a0 5859 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5860 if (data->cancelled != 0) {
5861 struct rpc_task *task;
5862 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5863 data->arg.lock_seqid);
5864 if (!IS_ERR(task))
bf294b41 5865 rpc_put_task_async(task);
3110ff80 5866 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5867 } else
5868 nfs_free_seqid(data->arg.lock_seqid);
5869 nfs4_put_lock_state(data->lsp);
5870 put_nfs_open_context(data->ctx);
feaff8e5 5871 fput(data->fl.fl_file);
a5d16a4d 5872 kfree(data);
3110ff80 5873 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5874}
5875
5876static const struct rpc_call_ops nfs4_lock_ops = {
5877 .rpc_call_prepare = nfs4_lock_prepare,
5878 .rpc_call_done = nfs4_lock_done,
5879 .rpc_release = nfs4_lock_release,
5880};
5881
2bee72a6
TM		 5882static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5883{
2bee72a6
TM		 5884 switch (error) {
5885 case -NFS4ERR_ADMIN_REVOKED:
5886 case -NFS4ERR_BAD_STATEID:
ecac799a 5887 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5888 if (new_lock_owner != 0 ||
795a88c9 5889 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5890 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5891 break;
5892 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5893 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5894 case -NFS4ERR_EXPIRED:
5895 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5896 };
5897}
5898
afe6c27c 5899static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5900{
5901 struct nfs4_lockdata *data;
5902 struct rpc_task *task;
5138fde0
TM		 5903 struct rpc_message msg = {
5904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5905 .rpc_cred = state->owner->so_cred,
5906 };
c970aa85
TM		 5907 struct rpc_task_setup task_setup_data = {
5908 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5909 .rpc_message = &msg,
c970aa85 5910 .callback_ops = &nfs4_lock_ops,
101070ca 5911 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5912 .flags = RPC_TASK_ASYNC,
5913 };
a5d16a4d
TM		 5914 int ret;
5915
3110ff80 5916 dprintk("%s: begin!\n", __func__);
cd3758e3 5917 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5918 fl->fl_u.nfs4_fl.owner,
5919 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5920 if (data == NULL)
5921 return -ENOMEM;
5922 if (IS_SETLKW(cmd))
5923 data->arg.block = 1;
a9c92d6b 5924 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5925 msg.rpc_argp = &data->arg;
5926 msg.rpc_resp = &data->res;
c970aa85 5927 task_setup_data.callback_data = data;
8fe72bac
TM		 5928 if (recovery_type > NFS_LOCK_NEW) {
5929 if (recovery_type == NFS_LOCK_RECLAIM)
5930 data->arg.reclaim = NFS_LOCK_RECLAIM;
5931 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5932 } else
5933 data->arg.new_lock = 1;
c970aa85 5934 task = rpc_run_task(&task_setup_data);
7a1218a2 5935 if (IS_ERR(task))
a5d16a4d 5936 return PTR_ERR(task);
a5d16a4d
TM		 5937 ret = nfs4_wait_for_completion_rpc_task(task);
5938 if (ret == 0) {
5939 ret = data->rpc_status;
2bee72a6
TM		 5940 if (ret)
5941 nfs4_handle_setlk_error(data->server, data->lsp,
5942 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5943 } else
5944 data->cancelled = 1;
e6b3c4db 5945 rpc_put_task(task);
3110ff80 5946 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 5947 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 5948 return ret;
1da177e4
LT		 5949}
5950
5951static int nfs4_lock_reclaim(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
5959 do {
42a2d13e
TM		 5960 /* Cache the lock if possible... */
5961 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5962 return 0;
afe6c27c 5963 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5964 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5965 break;
5966 nfs4_handle_exception(server, err, &exception);
5967 } while (exception.retry);
5968 return err;
1da177e4
LT		 5969}
5970
5971static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5972{
202b50dc 5973 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5974 struct nfs4_exception exception = {
5975 .inode = state->inode,
5976 };
202b50dc
TM		 5977 int err;
5978
6bfc93ef
TM		 5979 err = nfs4_set_lock_state(state, request);
5980 if (err != 0)
5981 return err;
f6de7a39 5982 if (!recover_lost_locks) {
ef1820f9
N		 5983 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5984 return 0;
5985 }
202b50dc 5986 do {
42a2d13e
TM		 5987 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5988 return 0;
afe6c27c 5989 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5990 switch (err) {
5991 default:
5992 goto out;
5993 case -NFS4ERR_GRACE:
5994 case -NFS4ERR_DELAY:
5995 nfs4_handle_exception(server, err, &exception);
5996 err = 0;
5997 }
202b50dc 5998 } while (exception.retry);
a9ed2e25 5999out:
202b50dc 6000 return err;
1da177e4
LT		 6001}
6002
f062eb6c 6003#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6004/**
6005 * nfs41_check_expired_locks - possibly free a lock stateid
6006 *
6007 * @state: NFSv4 state for an inode
6008 *
6009 * Returns NFS_OK if recovery for this stateid is now finished.
6010 * Otherwise a negative NFS4ERR value is returned.
6011 */
b01dd1d8 6012static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6013{
eb64cf96 6014 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6015 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6016 struct nfs_server *server = NFS_SERVER(state->inode);
6017
b01dd1d8 6018 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6019 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6020 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6021
6022 status = nfs41_test_stateid(server,
6023 &lsp->ls_stateid,
6024 cred);
08cb47fa 6025 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6026 if (status != NFS_OK) {
3e60ffdd
CL		 6027 /* Free the stateid unless the server
6028 * informs us the stateid is unrecognized. */
89af2739
CL		 6029 if (status != -NFS4ERR_BAD_STATEID)
6030 nfs41_free_stateid(server,
ab7cb0df
TM		 6031 &lsp->ls_stateid,
6032 cred);
795a88c9 6033 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6034 ret = status;
6035 }
6036 }
6037 };
6038
6039 return ret;
6040}
6041
6042static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6043{
6044 int status = NFS_OK;
6045
6046 if (test_bit(LK_STATE_IN_USE, &state->flags))
6047 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6048 if (status != NFS_OK)
6049 status = nfs4_lock_expired(state, request);
6050 return status;
f062eb6c
BS		 6051}
6052#endif
6053
1da177e4
LT		 6054static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6055{
19e03c57 6056 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6057 struct nfs4_state_owner *sp = state->owner;
01c3b861 6058 unsigned char fl_flags = request->fl_flags;
8e469ebd 6059 int status = -ENOLCK;
1da177e4 6060
8e469ebd
TM		 6061 if ((fl_flags & FL_POSIX) &&
6062 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6063 goto out;
6bfc93ef 6064 /* Is this a delegated open? */
6bfc93ef
TM		 6065 status = nfs4_set_lock_state(state, request);
6066 if (status != 0)
6067 goto out;
01c3b861 6068 request->fl_flags |= FL_ACCESS;
83bfff23 6069 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6070 if (status < 0)
6071 goto out;
11476e9d 6072 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6073 down_read(&nfsi->rwsem);
01c3b861 6074 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6075 /* Yes: cache locks! */
01c3b861 6076 /* ...but avoid races with delegation recall... */
19e03c57 6077 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6078 status = do_vfs_lock(state->inode, request);
c69899a1 6079 up_read(&nfsi->rwsem);
11476e9d 6080 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6081 goto out;
9a99af49 6082 }
19e03c57 6083 up_read(&nfsi->rwsem);
11476e9d 6084 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6085 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6086out:
6087 request->fl_flags = fl_flags;
1da177e4
LT		 6088 return status;
6089}
6090
6091static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6092{
a1d0b5ee
TM		 6093 struct nfs4_exception exception = {
6094 .state = state,
05ffe24f 6095 .inode = state->inode,
a1d0b5ee 6096 };
1da177e4
LT		 6097 int err;
6098
6099 do {
965b5d67
TM		 6100 err = _nfs4_proc_setlk(state, cmd, request);
6101 if (err == -NFS4ERR_DENIED)
6102 err = -EAGAIN;
1da177e4 6103 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6104 err, &exception);
1da177e4
LT		 6105 } while (exception.retry);
6106 return err;
6107}
6108
6109static int
6110nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6111{
6112 struct nfs_open_context *ctx;
6113 struct nfs4_state *state;
6114 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6115 int status;
6116
6117 /* verify open state */
cd3758e3 6118 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6119 state = ctx->state;
6120
6121 if (request->fl_start < 0 || request->fl_end < 0)
6122 return -EINVAL;
6123
d953126a
TM		 6124 if (IS_GETLK(cmd)) {
6125 if (state != NULL)
6126 return nfs4_proc_getlk(state, F_GETLK, request);
6127 return 0;
6128 }
1da177e4
LT		 6129
6130 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6131 return -EINVAL;
6132
d953126a
TM		 6133 if (request->fl_type == F_UNLCK) {
6134 if (state != NULL)
6135 return nfs4_proc_unlck(state, cmd, request);
6136 return 0;
6137 }
1da177e4 6138
d953126a
TM		 6139 if (state == NULL)
6140 return -ENOLCK;
55725513
TM		 6141 /*
6142 * Don't rely on the VFS having checked the file open mode,
6143 * since it won't do this for flock() locks.
6144 */
f44106e2 6145 switch (request->fl_type) {
55725513
TM		 6146 case F_RDLCK:
6147 if (!(filp->f_mode & FMODE_READ))
6148 return -EBADF;
6149 break;
6150 case F_WRLCK:
6151 if (!(filp->f_mode & FMODE_WRITE))
6152 return -EBADF;
6153 }
6154
1da177e4
LT		 6155 do {
6156 status = nfs4_proc_setlk(state, cmd, request);
6157 if ((status != -EAGAIN) || IS_SETLK(cmd))
6158 break;
6159 timeout = nfs4_set_lock_task_retry(timeout);
6160 status = -ERESTARTSYS;
6161 if (signalled())
6162 break;
6163 } while(status < 0);
1da177e4
LT		 6164 return status;
6165}
6166
db4f2e63 6167int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6168{
6169 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6170 int err;
6171
6172 err = nfs4_set_lock_state(state, fl);
6173 if (err != 0)
db4f2e63 6174 return err;
4a706fa0 6175 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6176 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6177}
6b3b5496 6178
cf470c3e
TM		 6179struct nfs_release_lockowner_data {
6180 struct nfs4_lock_state *lsp;
5ae67c4f 6181 struct nfs_server *server;
cf470c3e 6182 struct nfs_release_lockowner_args args;
b7e63a10 6183 struct nfs_release_lockowner_res res;
60ea6812 6184 unsigned long timestamp;
cf470c3e
TM		 6185};
6186
fbd4bfd1
CL		 6187static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6188{
6189 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6190 struct nfs_server *server = data->server;
cb04ad2a
PT		 6191 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6192 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6193 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6194 data->timestamp = jiffies;
fbd4bfd1
CL		 6195}
6196
6197static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6198{
6199 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6200 struct nfs_server *server = data->server;
6201
b7e63a10 6202 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6203
6204 switch (task->tk_status) {
6205 case 0:
6206 renew_lease(server, data->timestamp);
6207 break;
6208 case -NFS4ERR_STALE_CLIENTID:
6209 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6210 nfs4_schedule_lease_recovery(server->nfs_client);
6211 break;
60ea6812
CL		 6212 case -NFS4ERR_LEASE_MOVED:
6213 case -NFS4ERR_DELAY:
8478eaa1
N		 6214 if (nfs4_async_handle_error(task, server,
6215 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6216 rpc_restart_call_prepare(task);
6217 }
fbd4bfd1
CL		 6218}
6219
d3c7b7cc
TM		 6220static void nfs4_release_lockowner_release(void *calldata)
6221{
cf470c3e 6222 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6223 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6224 kfree(calldata);
6225}
6226
17280175 6227static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6228 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6229 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6230 .rpc_release = nfs4_release_lockowner_release,
6231};
6232
f1cdae87
JL		 6233static void
6234nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6235{
cf470c3e 6236 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6237 struct rpc_message msg = {
6238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6239 };
6240
6241 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6242 return;
fbd4bfd1 6243
cf470c3e
TM		 6244 data = kmalloc(sizeof(*data), GFP_NOFS);
6245 if (!data)
f1cdae87 6246 return;
cf470c3e 6247 data->lsp = lsp;
5ae67c4f 6248 data->server = server;
cf470c3e
TM		 6249 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6250 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6251 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6252
cf470c3e 6253 msg.rpc_argp = &data->args;
b7e63a10
TM		 6254 msg.rpc_resp = &data->res;
6255 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6256 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6257}
6258
aa1870af
BF		 6259#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6260
d9a82a04
AG		 6261static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6262 struct dentry *dentry, const char *key,
64c2ce8b 6263 const void *buf, size_t buflen,
d9a82a04 6264 int flags)
6b3b5496 6265{
2b0143b5 6266 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6267}
6268
d9a82a04
AG		 6269static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6270 struct dentry *dentry, const char *key,
6271 void *buf, size_t buflen)
6b3b5496 6272{
2b0143b5 6273 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6274}
6275
764a5c6b 6276static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6277{
764a5c6b 6278 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6279}
6280
c9bccef6 6281#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6282
d9a82a04
AG		 6283static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6284 struct dentry *dentry, const char *key,
6285 const void *buf, size_t buflen,
6286 int flags)
c9bccef6
DQ		 6287{
6288 if (security_ismaclabel(key))
6289 return nfs4_set_security_label(dentry, buf, buflen);
6290
6291 return -EOPNOTSUPP;
6292}
6293
d9a82a04
AG		 6294static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6295 struct dentry *dentry, const char *key,
6296 void *buf, size_t buflen)
c9bccef6
DQ		 6297{
6298 if (security_ismaclabel(key))
2b0143b5 6299 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6300 return -EOPNOTSUPP;
6301}
6302
c4803c49
AG		 6303static ssize_t
6304nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6305{
c4803c49 6306 int len = 0;
c9bccef6 6307
c4803c49
AG		 6308 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6309 len = security_inode_listsecurity(inode, list, list_len);
6310 if (list_len && len > list_len)
6311 return -ERANGE;
c9bccef6
DQ		 6312 }
6313 return len;
6314}
6315
6316static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6317 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6318 .get = nfs4_xattr_get_nfs4_label,
6319 .set = nfs4_xattr_set_nfs4_label,
6320};
c9bccef6 6321
c4803c49
AG		 6322#else
6323
6324static ssize_t
6325nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6326{
6327 return 0;
6328}
6329
6330#endif
c9bccef6 6331
533eb461
AA		 6332/*
6333 * nfs_fhget will use either the mounted_on_fileid or the fileid
6334 */
69aaaae1
TM		 6335static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6336{
533eb461
AA		 6337 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6338 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6339 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6340 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6341 return;
6342
6343 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6344 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6345 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6346 fattr->nlink = 2;
6347}
6348
f05d147f
BS		 6349static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6350 const struct qstr *name,
6351 struct nfs4_fs_locations *fs_locations,
6352 struct page *page)
683b57b4
TM		 6353{
6354 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6355 u32 bitmask[3] = {
361e624f 6356 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6357 };
6358 struct nfs4_fs_locations_arg args = {
6359 .dir_fh = NFS_FH(dir),
c228fd3a 6360 .name = name,
683b57b4
TM		 6361 .page = page,
6362 .bitmask = bitmask,
6363 };
22958463
BH		 6364 struct nfs4_fs_locations_res res = {
6365 .fs_locations = fs_locations,
6366 };
683b57b4
TM		 6367 struct rpc_message msg = {
6368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6369 .rpc_argp = &args,
22958463 6370 .rpc_resp = &res,
683b57b4
TM		 6371 };
6372 int status;
6373
3110ff80 6374 dprintk("%s: start\n", __func__);
533eb461
AA		 6375
6376 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6377 * is not supported */
6378 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6379 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6380 else
6381 bitmask[0] |= FATTR4_WORD0_FILEID;
6382
c228fd3a 6383 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6384 fs_locations->server = server;
830b8e33 6385 fs_locations->nlocations = 0;
f05d147f 6386 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6387 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6388 return status;
6389}
6390
f05d147f
BS		 6391int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6392 const struct qstr *name,
6393 struct nfs4_fs_locations *fs_locations,
6394 struct page *page)
db0a9593
BS		 6395{
6396 struct nfs4_exception exception = { };
6397 int err;
6398 do {
078ea3df
TM		 6399 err = _nfs4_proc_fs_locations(client, dir, name,
6400 fs_locations, page);
6401 trace_nfs4_get_fs_locations(dir, name, err);
6402 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6403 &exception);
6404 } while (exception.retry);
6405 return err;
6406}
6407
b03d735b
CL		 6408/*
6409 * This operation also signals the server that this client is
6410 * performing migration recovery. The server can stop returning
6411 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6412 * appended to this compound to identify the client ID which is
6413 * performing recovery.
6414 */
6415static int _nfs40_proc_get_locations(struct inode *inode,
6416 struct nfs4_fs_locations *locations,
6417 struct page *page, struct rpc_cred *cred)
6418{
6419 struct nfs_server *server = NFS_SERVER(inode);
6420 struct rpc_clnt *clnt = server->client;
6421 u32 bitmask[2] = {
6422 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6423 };
6424 struct nfs4_fs_locations_arg args = {
6425 .clientid = server->nfs_client->cl_clientid,
6426 .fh = NFS_FH(inode),
6427 .page = page,
6428 .bitmask = bitmask,
6429 .migration = 1, /* skip LOOKUP */
6430 .renew = 1, /* append RENEW */
6431 };
6432 struct nfs4_fs_locations_res res = {
6433 .fs_locations = locations,
6434 .migration = 1,
6435 .renew = 1,
6436 };
6437 struct rpc_message msg = {
6438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6439 .rpc_argp = &args,
6440 .rpc_resp = &res,
6441 .rpc_cred = cred,
6442 };
6443 unsigned long now = jiffies;
6444 int status;
6445
6446 nfs_fattr_init(&locations->fattr);
6447 locations->server = server;
6448 locations->nlocations = 0;
6449
6450 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6451 nfs4_set_sequence_privileged(&args.seq_args);
6452 status = nfs4_call_sync_sequence(clnt, server, &msg,
6453 &args.seq_args, &res.seq_res);
6454 if (status)
6455 return status;
6456
6457 renew_lease(server, now);
6458 return 0;
6459}
6460
6461#ifdef CONFIG_NFS_V4_1
6462
6463/*
6464 * This operation also signals the server that this client is
6465 * performing migration recovery. The server can stop asserting
6466 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6467 * performing this operation is identified in the SEQUENCE
6468 * operation in this compound.
6469 *
6470 * When the client supports GETATTR(fs_locations_info), it can
6471 * be plumbed in here.
6472 */
6473static int _nfs41_proc_get_locations(struct inode *inode,
6474 struct nfs4_fs_locations *locations,
6475 struct page *page, struct rpc_cred *cred)
6476{
6477 struct nfs_server *server = NFS_SERVER(inode);
6478 struct rpc_clnt *clnt = server->client;
6479 u32 bitmask[2] = {
6480 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6481 };
6482 struct nfs4_fs_locations_arg args = {
6483 .fh = NFS_FH(inode),
6484 .page = page,
6485 .bitmask = bitmask,
6486 .migration = 1, /* skip LOOKUP */
6487 };
6488 struct nfs4_fs_locations_res res = {
6489 .fs_locations = locations,
6490 .migration = 1,
6491 };
6492 struct rpc_message msg = {
6493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6494 .rpc_argp = &args,
6495 .rpc_resp = &res,
6496 .rpc_cred = cred,
6497 };
6498 int status;
6499
6500 nfs_fattr_init(&locations->fattr);
6501 locations->server = server;
6502 locations->nlocations = 0;
6503
6504 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6505 nfs4_set_sequence_privileged(&args.seq_args);
6506 status = nfs4_call_sync_sequence(clnt, server, &msg,
6507 &args.seq_args, &res.seq_res);
6508 if (status == NFS4_OK &&
6509 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6510 status = -NFS4ERR_LEASE_MOVED;
6511 return status;
6512}
6513
6514#endif /* CONFIG_NFS_V4_1 */
6515
6516/**
6517 * nfs4_proc_get_locations - discover locations for a migrated FSID
6518 * @inode: inode on FSID that is migrating
6519 * @locations: result of query
6520 * @page: buffer
6521 * @cred: credential to use for this operation
6522 *
6523 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6524 * operation failed, or a negative errno if a local error occurred.
6525 *
6526 * On success, "locations" is filled in, but if the server has
6527 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6528 * asserted.
6529 *
6530 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6531 * from this client that require migration recovery.
6532 */
6533int nfs4_proc_get_locations(struct inode *inode,
6534 struct nfs4_fs_locations *locations,
6535 struct page *page, struct rpc_cred *cred)
6536{
6537 struct nfs_server *server = NFS_SERVER(inode);
6538 struct nfs_client *clp = server->nfs_client;
6539 const struct nfs4_mig_recovery_ops *ops =
6540 clp->cl_mvops->mig_recovery_ops;
6541 struct nfs4_exception exception = { };
6542 int status;
6543
6544 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6545 (unsigned long long)server->fsid.major,
6546 (unsigned long long)server->fsid.minor,
6547 clp->cl_hostname);
6548 nfs_display_fhandle(NFS_FH(inode), __func__);
6549
6550 do {
6551 status = ops->get_locations(inode, locations, page, cred);
6552 if (status != -NFS4ERR_DELAY)
6553 break;
6554 nfs4_handle_exception(server, status, &exception);
6555 } while (exception.retry);
6556 return status;
6557}
6558
44c99933
CL		 6559/*
6560 * This operation also signals the server that this client is
6561 * performing "lease moved" recovery. The server can stop
6562 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6563 * is appended to this compound to identify the client ID which is
6564 * performing recovery.
6565 */
6566static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6567{
6568 struct nfs_server *server = NFS_SERVER(inode);
6569 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6570 struct rpc_clnt *clnt = server->client;
6571 struct nfs4_fsid_present_arg args = {
6572 .fh = NFS_FH(inode),
6573 .clientid = clp->cl_clientid,
6574 .renew = 1, /* append RENEW */
6575 };
6576 struct nfs4_fsid_present_res res = {
6577 .renew = 1,
6578 };
6579 struct rpc_message msg = {
6580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6581 .rpc_argp = &args,
6582 .rpc_resp = &res,
6583 .rpc_cred = cred,
6584 };
6585 unsigned long now = jiffies;
6586 int status;
6587
6588 res.fh = nfs_alloc_fhandle();
6589 if (res.fh == NULL)
6590 return -ENOMEM;
6591
6592 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6593 nfs4_set_sequence_privileged(&args.seq_args);
6594 status = nfs4_call_sync_sequence(clnt, server, &msg,
6595 &args.seq_args, &res.seq_res);
6596 nfs_free_fhandle(res.fh);
6597 if (status)
6598 return status;
6599
6600 do_renew_lease(clp, now);
6601 return 0;
6602}
6603
6604#ifdef CONFIG_NFS_V4_1
6605
6606/*
6607 * This operation also signals the server that this client is
6608 * performing "lease moved" recovery. The server can stop asserting
6609 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6610 * this operation is identified in the SEQUENCE operation in this
6611 * compound.
6612 */
6613static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6614{
6615 struct nfs_server *server = NFS_SERVER(inode);
6616 struct rpc_clnt *clnt = server->client;
6617 struct nfs4_fsid_present_arg args = {
6618 .fh = NFS_FH(inode),
6619 };
6620 struct nfs4_fsid_present_res res = {
6621 };
6622 struct rpc_message msg = {
6623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6624 .rpc_argp = &args,
6625 .rpc_resp = &res,
6626 .rpc_cred = cred,
6627 };
6628 int status;
6629
6630 res.fh = nfs_alloc_fhandle();
6631 if (res.fh == NULL)
6632 return -ENOMEM;
6633
6634 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6635 nfs4_set_sequence_privileged(&args.seq_args);
6636 status = nfs4_call_sync_sequence(clnt, server, &msg,
6637 &args.seq_args, &res.seq_res);
6638 nfs_free_fhandle(res.fh);
6639 if (status == NFS4_OK &&
6640 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6641 status = -NFS4ERR_LEASE_MOVED;
6642 return status;
6643}
6644
6645#endif /* CONFIG_NFS_V4_1 */
6646
6647/**
6648 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6649 * @inode: inode on FSID to check
6650 * @cred: credential to use for this operation
6651 *
6652 * Server indicates whether the FSID is present, moved, or not
6653 * recognized. This operation is necessary to clear a LEASE_MOVED
6654 * condition for this client ID.
6655 *
6656 * Returns NFS4_OK if the FSID is present on this server,
6657 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6658 * NFS4ERR code if some error occurred on the server, or a
6659 * negative errno if a local failure occurred.
6660 */
6661int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6662{
6663 struct nfs_server *server = NFS_SERVER(inode);
6664 struct nfs_client *clp = server->nfs_client;
6665 const struct nfs4_mig_recovery_ops *ops =
6666 clp->cl_mvops->mig_recovery_ops;
6667 struct nfs4_exception exception = { };
6668 int status;
6669
6670 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6671 (unsigned long long)server->fsid.major,
6672 (unsigned long long)server->fsid.minor,
6673 clp->cl_hostname);
6674 nfs_display_fhandle(NFS_FH(inode), __func__);
6675
6676 do {
6677 status = ops->fsid_present(inode, cred);
6678 if (status != -NFS4ERR_DELAY)
6679 break;
6680 nfs4_handle_exception(server, status, &exception);
6681 } while (exception.retry);
6682 return status;
6683}
6684
5ec16a85 6685/**
a5250def
WAA		 6686 * If 'use_integrity' is true and the state managment nfs_client
6687 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6688 * and the machine credential as per RFC3530bis and RFC5661 Security
6689 * Considerations sections. Otherwise, just use the user cred with the
6690 * filesystem's rpc_client.
5ec16a85 6691 */
a5250def 6692static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6693{
6694 int status;
6695 struct nfs4_secinfo_arg args = {
6696 .dir_fh = NFS_FH(dir),
6697 .name = name,
6698 };
6699 struct nfs4_secinfo_res res = {
6700 .flavors = flavors,
6701 };
6702 struct rpc_message msg = {
6703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6704 .rpc_argp = &args,
6705 .rpc_resp = &res,
6706 };
a5250def 6707 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6708 struct rpc_cred *cred = NULL;
a5250def
WAA		 6709
6710 if (use_integrity) {
6711 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6712 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6713 msg.rpc_cred = cred;
a5250def 6714 }
5a5ea0d4
BS		 6715
6716 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6717
6718 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6719 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6720
a5250def
WAA		 6721 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6722 &res.seq_res, 0);
5a5ea0d4 6723 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6724
7cb852df
WAA		 6725 if (cred)
6726 put_rpccred(cred);
a5250def 6727
5a5ea0d4
BS		 6728 return status;
6729}
6730
72de53ec
BS		 6731int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6732 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6733{
6734 struct nfs4_exception exception = { };
6735 int err;
6736 do {
a5250def
WAA		 6737 err = -NFS4ERR_WRONGSEC;
6738
6739 /* try to use integrity protection with machine cred */
6740 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6741 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6742
6743 /*
6744 * if unable to use integrity protection, or SECINFO with
6745 * integrity protection returns NFS4ERR_WRONGSEC (which is
6746 * disallowed by spec, but exists in deployed servers) use
6747 * the current filesystem's rpc_client and the user cred.
6748 */
6749 if (err == -NFS4ERR_WRONGSEC)
6750 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6751
078ea3df
TM		 6752 trace_nfs4_secinfo(dir, name, err);
6753 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6754 &exception);
6755 } while (exception.retry);
6756 return err;
6757}
6758
557134a3 6759#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6760/*
6761 * Check the exchange flags returned by the server for invalid flags, having
6762 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6763 * DS flags set.
6764 */
6765static int nfs4_check_cl_exchange_flags(u32 flags)
6766{
6767 if (flags & ~EXCHGID4_FLAG_MASK_R)
6768 goto out_inval;
6769 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6770 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6771 goto out_inval;
6772 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6773 goto out_inval;
6774 return NFS_OK;
6775out_inval:
6776 return -NFS4ERR_INVAL;
6777}
6778
78fe0f41 6779static bool
79d4e1f0
CL		 6780nfs41_same_server_scope(struct nfs41_server_scope *a,
6781 struct nfs41_server_scope *b)
78fe0f41
WAA		 6782{
6783 if (a->server_scope_sz == b->server_scope_sz &&
6784 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6785 return true;
6786
6787 return false;
6788}
6789
02a95dee
AA		 6790static void
6791nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
6792{
6793}
6794
6795static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
6796 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
6797};
6798
7c44f1ae 6799/*
d9ddbf5d 6800 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 6801 *
6802 * The 4.1 client currently uses the same TCP connection for the
6803 * fore and backchannel.
6804 */
d9ddbf5d
TM		 6805static
6806int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
6807 struct rpc_xprt *xprt,
6808 struct nfs_client *clp,
6809 struct rpc_cred *cred)
7c44f1ae
WAA		 6810{
6811 int status;
71a097c6
TM		 6812 struct nfs41_bind_conn_to_session_args args = {
6813 .client = clp,
6814 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6815 };
7c44f1ae
WAA		 6816 struct nfs41_bind_conn_to_session_res res;
6817 struct rpc_message msg = {
6818 .rpc_proc =
6819 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6820 .rpc_argp = &args,
7c44f1ae 6821 .rpc_resp = &res,
2cf047c9 6822 .rpc_cred = cred,
7c44f1ae 6823 };
d9ddbf5d
TM		 6824 struct rpc_task_setup task_setup_data = {
6825 .rpc_client = clnt,
6826 .rpc_xprt = xprt,
02a95dee 6827 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 6828 .rpc_message = &msg,
6829 .flags = RPC_TASK_TIMEOUT,
6830 };
6831 struct rpc_task *task;
7c44f1ae
WAA		 6832
6833 dprintk("--> %s\n", __func__);
7c44f1ae 6834
71a097c6
TM		 6835 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6836 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6837 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 6838
d9ddbf5d
TM		 6839 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
6840 if (xprt != rcu_access_pointer(clnt->cl_xprt))
6841 args.dir = NFS4_CDFC4_FORE;
6842
6843 task = rpc_run_task(&task_setup_data);
6844 if (!IS_ERR(task)) {
6845 status = task->tk_status;
6846 rpc_put_task(task);
6847 } else
6848 status = PTR_ERR(task);
c6d01c6f 6849 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6850 if (status == 0) {
71a097c6 6851 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6852 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6853 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6854 status = -EIO;
71a097c6 6855 goto out;
7c44f1ae 6856 }
71a097c6 6857 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6858 dprintk("NFS: %s: Unexpected direction from server\n",
6859 __func__);
6860 status = -EIO;
71a097c6 6861 goto out;
7c44f1ae 6862 }
71a097c6 6863 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6864 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6865 __func__);
6866 status = -EIO;
71a097c6 6867 goto out;
7c44f1ae
WAA		 6868 }
6869 }
7c44f1ae
WAA		 6870out:
6871 dprintk("<-- %s status= %d\n", __func__, status);
6872 return status;
6873}
6874
d9ddbf5d
TM		 6875struct rpc_bind_conn_calldata {
6876 struct nfs_client *clp;
6877 struct rpc_cred *cred;
6878};
6879
6880static int
6881nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
6882 struct rpc_xprt *xprt,
6883 void *calldata)
6884{
6885 struct rpc_bind_conn_calldata *p = calldata;
6886
6887 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
6888}
6889
6890int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6891{
6892 struct rpc_bind_conn_calldata data = {
6893 .clp = clp,
6894 .cred = cred,
6895 };
6896 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
6897 nfs4_proc_bind_conn_to_session_callback, &data);
6898}
6899
99fe60d0 6900/*
fa940720
WAA		 6901 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6902 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6903 */
6904static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6905 .how = SP4_MACH_CRED,
6906 .enforce.u.words = {
6907 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6908 1 << (OP_EXCHANGE_ID - 32) |
6909 1 << (OP_CREATE_SESSION - 32) |
6910 1 << (OP_DESTROY_SESSION - 32) |
6911 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6912 },
6913 .allow.u.words = {
6914 [0] = 1 << (OP_CLOSE) |
99ade3c7 6915 1 << (OP_OPEN_DOWNGRADE) |
a0279625 6916 1 << (OP_LOCKU) |
99ade3c7 6917 1 << (OP_DELEGRETURN) |
a0279625 6918 1 << (OP_COMMIT),
8b5bee2e 6919 [1] = 1 << (OP_SECINFO - 32) |
3787d506 6920 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 6921 1 << (OP_LAYOUTRETURN - 32) |
3787d506 6922 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6923 1 << (OP_FREE_STATEID - 32) |
6924 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6925 }
6926};
6927
6928/*
6929 * Select the state protection mode for client `clp' given the server results
6930 * from exchange_id in `sp'.
99fe60d0 6931 *
2031cd1a
WAA		 6932 * Returns 0 on success, negative errno otherwise.
6933 */
6934static int nfs4_sp4_select_mode(struct nfs_client *clp,
6935 struct nfs41_state_protection *sp)
6936{
6937 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6938 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6939 1 << (OP_EXCHANGE_ID - 32) |
6940 1 << (OP_CREATE_SESSION - 32) |
6941 1 << (OP_DESTROY_SESSION - 32) |
6942 1 << (OP_DESTROY_CLIENTID - 32)
6943 };
6944 unsigned int i;
6945
6946 if (sp->how == SP4_MACH_CRED) {
6947 /* Print state protect result */
6948 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6949 for (i = 0; i <= LAST_NFS4_OP; i++) {
6950 if (test_bit(i, sp->enforce.u.longs))
6951 dfprintk(MOUNT, " enforce op %d\n", i);
6952 if (test_bit(i, sp->allow.u.longs))
6953 dfprintk(MOUNT, " allow op %d\n", i);
6954 }
6955
6956 /* make sure nothing is on enforce list that isn't supported */
6957 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6958 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6959 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6960 return -EINVAL;
6961 }
6962 }
6963
6964 /*
6965 * Minimal mode - state operations are allowed to use machine
6966 * credential. Note this already happens by default, so the
6967 * client doesn't have to do anything more than the negotiation.
6968 *
6969 * NOTE: we don't care if EXCHANGE_ID is in the list -
6970 * we're already using the machine cred for exchange_id
6971 * and will never use a different cred.
6972 */
6973 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6974 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6975 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6976 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6977 dfprintk(MOUNT, "sp4_mach_cred:\n");
6978 dfprintk(MOUNT, " minimal mode enabled\n");
6979 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6980 } else {
6981 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6982 return -EINVAL;
6983 }
fa940720
WAA		 6984
6985 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 6986 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
6987 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 6988 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6989 dfprintk(MOUNT, " cleanup mode enabled\n");
6990 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6991 }
8b5bee2e 6992
99ade3c7
AE		 6993 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
6994 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
6995 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
6996 &clp->cl_sp4_flags);
6997 }
6998
8b5bee2e
WAA		 6999 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7000 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7001 dfprintk(MOUNT, " secinfo mode enabled\n");
7002 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7003 }
3787d506
WAA		 7004
7005 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7006 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7007 dfprintk(MOUNT, " stateid mode enabled\n");
7008 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7009 }
8c21c62c
WAA		 7010
7011 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7012 dfprintk(MOUNT, " write mode enabled\n");
7013 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7014 }
7015
7016 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7017 dfprintk(MOUNT, " commit mode enabled\n");
7018 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7019 }
2031cd1a
WAA		 7020 }
7021
7022 return 0;
7023}
7024
7025/*
7026 * _nfs4_proc_exchange_id()
6bbb4ae8 7027 *
2031cd1a 7028 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7029 */
2031cd1a
WAA		 7030static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7031 u32 sp4_how)
99fe60d0
BH		 7032{
7033 nfs4_verifier verifier;
7034 struct nfs41_exchange_id_args args = {
cd93710e 7035 .verifier = &verifier,
99fe60d0 7036 .client = clp,
cd3fadec 7037#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7038 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7039 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7040 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7041#else
7042 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7043 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7044#endif
99fe60d0
BH		 7045 };
7046 struct nfs41_exchange_id_res res = {
32b01310 7047 0
99fe60d0
BH		 7048 };
7049 int status;
7050 struct rpc_message msg = {
7051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7052 .rpc_argp = &args,
7053 .rpc_resp = &res,
7054 .rpc_cred = cred,
7055 };
99fe60d0 7056
f092075d 7057 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7058
7059 status = nfs4_init_uniform_client_string(clp);
7060 if (status)
3a6bb738 7061 goto out;
3a6bb738
JL		 7062
7063 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7064 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7065 clp->cl_owner_id);
99fe60d0 7066
acdeb69d 7067 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7068 GFP_NOFS);
acdeb69d 7069 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7070 status = -ENOMEM;
7071 goto out;
7072 }
78fe0f41 7073
79d4e1f0 7074 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7075 GFP_NOFS);
177313f1 7076 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7077 status = -ENOMEM;
acdeb69d 7078 goto out_server_owner;
abe9a6d5 7079 }
78fe0f41 7080
bbafffd2 7081 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7082 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7083 status = -ENOMEM;
7084 goto out_server_scope;
7085 }
7086
2031cd1a
WAA		 7087 switch (sp4_how) {
7088 case SP4_NONE:
7089 args.state_protect.how = SP4_NONE;
7090 break;
7091
7092 case SP4_MACH_CRED:
7093 args.state_protect = nfs4_sp4_mach_cred_request;
7094 break;
7095
7096 default:
7097 /* unsupported! */
7098 WARN_ON_ONCE(1);
7099 status = -EINVAL;
6b55970b 7100 goto out_impl_id;
2031cd1a
WAA		 7101 }
7102
1bd714f2 7103 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7104 trace_nfs4_exchange_id(clp, status);
177313f1 7105 if (status == 0)
32b01310 7106 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7107
2031cd1a
WAA		 7108 if (status == 0)
7109 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7110
acdeb69d 7111 if (status == 0) {
32b01310 7112 clp->cl_clientid = res.clientid;
e11259f9
TM		 7113 clp->cl_exchange_flags = res.flags;
7114 /* Client ID is not confirmed */
7115 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7116 clear_bit(NFS4_SESSION_ESTABLISHED,
7117 &clp->cl_session->session_state);
32b01310 7118 clp->cl_seqid = res.seqid;
e11259f9 7119 }
32b01310 7120
acdeb69d
CL		 7121 kfree(clp->cl_serverowner);
7122 clp->cl_serverowner = res.server_owner;
7123 res.server_owner = NULL;
78fe0f41 7124
7d2ed9ac 7125 /* use the most recent implementation id */
59155546
CL		 7126 kfree(clp->cl_implid);
7127 clp->cl_implid = res.impl_id;
6b55970b 7128 res.impl_id = NULL;
7d2ed9ac 7129
177313f1 7130 if (clp->cl_serverscope != NULL &&
79d4e1f0 7131 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7132 res.server_scope)) {
7133 dprintk("%s: server_scope mismatch detected\n",
7134 __func__);
7135 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7136 kfree(clp->cl_serverscope);
7137 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7138 }
7139
177313f1 7140 if (clp->cl_serverscope == NULL) {
79d4e1f0 7141 clp->cl_serverscope = res.server_scope;
6b55970b 7142 res.server_scope = NULL;
abe9a6d5 7143 }
6b55970b 7144 }
7d2ed9ac 7145
6b55970b
KM		 7146out_impl_id:
7147 kfree(res.impl_id);
7d2ed9ac 7148out_server_scope:
abe9a6d5 7149 kfree(res.server_scope);
6b55970b
KM		 7150out_server_owner:
7151 kfree(res.server_owner);
abe9a6d5 7152out:
177313f1 7153 if (clp->cl_implid != NULL)
6bbb4ae8 7154 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7155 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7156 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7157 clp->cl_implid->date.seconds,
7158 clp->cl_implid->date.nseconds);
6bbb4ae8 7159 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7160 return status;
7161}
7162
2031cd1a
WAA		 7163/*
7164 * nfs4_proc_exchange_id()
7165 *
7166 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7167 *
7168 * Since the clientid has expired, all compounds using sessions
7169 * associated with the stale clientid will be returning
7170 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7171 * be in some phase of session reset.
7172 *
7173 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7174 */
7175int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7176{
7177 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7178 int status;
7179
7180 /* try SP4_MACH_CRED if krb5i/p */
7181 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7182 authflavor == RPC_AUTH_GSS_KRB5P) {
7183 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7184 if (!status)
7185 return 0;
7186 }
7187
7188 /* try SP4_NONE */
7189 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7190}
7191
66245539
TM		 7192static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7193 struct rpc_cred *cred)
7194{
7195 struct rpc_message msg = {
7196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7197 .rpc_argp = clp,
7198 .rpc_cred = cred,
7199 };
7200 int status;
7201
7202 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7203 trace_nfs4_destroy_clientid(clp, status);
66245539 7204 if (status)
02c67525 7205 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7206 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7207 return status;
7208}
7209
7210static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7211 struct rpc_cred *cred)
7212{
7213 unsigned int loop;
7214 int ret;
7215
7216 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7217 ret = _nfs4_proc_destroy_clientid(clp, cred);
7218 switch (ret) {
7219 case -NFS4ERR_DELAY:
7220 case -NFS4ERR_CLIENTID_BUSY:
7221 ssleep(1);
7222 break;
7223 default:
7224 return ret;
7225 }
7226 }
7227 return 0;
7228}
7229
7230int nfs4_destroy_clientid(struct nfs_client *clp)
7231{
7232 struct rpc_cred *cred;
7233 int ret = 0;
7234
7235 if (clp->cl_mvops->minor_version < 1)
7236 goto out;
7237 if (clp->cl_exchange_flags == 0)
7238 goto out;
05f4c350
CL		 7239 if (clp->cl_preserve_clid)
7240 goto out;
73d8bde5 7241 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7242 ret = nfs4_proc_destroy_clientid(clp, cred);
7243 if (cred)
7244 put_rpccred(cred);
7245 switch (ret) {
7246 case 0:
7247 case -NFS4ERR_STALE_CLIENTID:
7248 clp->cl_exchange_flags = 0;
7249 }
7250out:
7251 return ret;
7252}
7253
2050f0cc
AA		 7254struct nfs4_get_lease_time_data {
7255 struct nfs4_get_lease_time_args *args;
7256 struct nfs4_get_lease_time_res *res;
7257 struct nfs_client *clp;
7258};
7259
7260static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7261 void *calldata)
7262{
2050f0cc
AA		 7263 struct nfs4_get_lease_time_data *data =
7264 (struct nfs4_get_lease_time_data *)calldata;
7265
7266 dprintk("--> %s\n", __func__);
7267 /* just setup sequence, do not trigger session recovery
7268 since we're invoked within one */
d9afbd1b
TM		 7269 nfs41_setup_sequence(data->clp->cl_session,
7270 &data->args->la_seq_args,
7271 &data->res->lr_seq_res,
7272 task);
2050f0cc
AA		 7273 dprintk("<-- %s\n", __func__);
7274}
7275
7276/*
7277 * Called from nfs4_state_manager thread for session setup, so don't recover
7278 * from sequence operation or clientid errors.
7279 */
7280static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7281{
7282 struct nfs4_get_lease_time_data *data =
7283 (struct nfs4_get_lease_time_data *)calldata;
7284
7285 dprintk("--> %s\n", __func__);
14516c3a
TM		 7286 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7287 return;
2050f0cc
AA		 7288 switch (task->tk_status) {
7289 case -NFS4ERR_DELAY:
7290 case -NFS4ERR_GRACE:
7291 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7292 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7293 task->tk_status = 0;
a8a4ae3a
AA		 7294 /* fall through */
7295 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7296 rpc_restart_call_prepare(task);
2050f0cc
AA		 7297 return;
7298 }
2050f0cc
AA		 7299 dprintk("<-- %s\n", __func__);
7300}
7301
17280175 7302static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7303 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7304 .rpc_call_done = nfs4_get_lease_time_done,
7305};
7306
7307int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7308{
7309 struct rpc_task *task;
7310 struct nfs4_get_lease_time_args args;
7311 struct nfs4_get_lease_time_res res = {
7312 .lr_fsinfo = fsinfo,
7313 };
7314 struct nfs4_get_lease_time_data data = {
7315 .args = &args,
7316 .res = &res,
7317 .clp = clp,
7318 };
7319 struct rpc_message msg = {
7320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7321 .rpc_argp = &args,
7322 .rpc_resp = &res,
7323 };
7324 struct rpc_task_setup task_setup = {
7325 .rpc_client = clp->cl_rpcclient,
7326 .rpc_message = &msg,
7327 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7328 .callback_data = &data,
7329 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7330 };
7331 int status;
7332
a9c92d6b 7333 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7334 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7335 dprintk("--> %s\n", __func__);
7336 task = rpc_run_task(&task_setup);
7337
7338 if (IS_ERR(task))
7339 status = PTR_ERR(task);
7340 else {
7341 status = task->tk_status;
7342 rpc_put_task(task);
7343 }
7344 dprintk("<-- %s return %d\n", __func__, status);
7345
7346 return status;
7347}
7348
fc931582
AA		 7349/*
7350 * Initialize the values to be used by the client in CREATE_SESSION
7351 * If nfs4_init_session set the fore channel request and response sizes,
7352 * use them.
7353 *
7354 * Set the back channel max_resp_sz_cached to zero to force the client to
7355 * always set csa_cachethis to FALSE because the current implementation
7356 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7357 */
7358static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7359{
18aad3d5
AA		 7360 unsigned int max_rqst_sz, max_resp_sz;
7361
7362 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7363 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7364
fc931582 7365 /* Fore channel attributes */
18aad3d5
AA		 7366 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7367 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7368 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7369 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7370
7371 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7372 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7373 __func__,
7374 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7375 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7376
7377 /* Back channel attributes */
fc931582
AA		 7378 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7379 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7380 args->bc_attrs.max_resp_sz_cached = 0;
7381 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
f4f58ed1 7382 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS;
fc931582
AA		 7383
7384 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7385 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7386 __func__,
7387 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7388 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7389 args->bc_attrs.max_reqs);
7390}
7391
79969dd1
TM		 7392static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7393 struct nfs41_create_session_res *res)
8d35301d 7394{
43c2e885 7395 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7396 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7397
43c2e885
BF		 7398 if (rcvd->max_resp_sz > sent->max_resp_sz)
7399 return -EINVAL;
7400 /*
7401 * Our requested max_ops is the minimum we need; we're not
7402 * prepared to break up compounds into smaller pieces than that.
7403 * So, no point even trying to continue if the server won't
7404 * cooperate:
7405 */
7406 if (rcvd->max_ops < sent->max_ops)
7407 return -EINVAL;
7408 if (rcvd->max_reqs == 0)
7409 return -EINVAL;
b4b9a0c1
VG		 7410 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7411 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7412 return 0;
8d35301d
AA		 7413}
7414
79969dd1
TM		 7415static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7416 struct nfs41_create_session_res *res)
43c2e885
BF		 7417{
7418 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7419 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7420
b1c0df5f
TM		 7421 if (!(res->flags & SESSION4_BACK_CHAN))
7422 goto out;
43c2e885
BF		 7423 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7424 return -EINVAL;
7425 if (rcvd->max_resp_sz < sent->max_resp_sz)
7426 return -EINVAL;
7427 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7428 return -EINVAL;
7429 /* These would render the backchannel useless: */
b4b9a0c1 7430 if (rcvd->max_ops != sent->max_ops)
43c2e885 7431 return -EINVAL;
b4b9a0c1 7432 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7433 return -EINVAL;
b1c0df5f 7434out:
43c2e885
BF		 7435 return 0;
7436}
8d35301d 7437
8d35301d 7438static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7439 struct nfs41_create_session_res *res)
8d35301d 7440{
43c2e885 7441 int ret;
8d35301d 7442
79969dd1 7443 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7444 if (ret)
7445 return ret;
79969dd1
TM		 7446 return nfs4_verify_back_channel_attrs(args, res);
7447}
7448
7449static void nfs4_update_session(struct nfs4_session *session,
7450 struct nfs41_create_session_res *res)
7451{
7452 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7453 /* Mark client id and session as being confirmed */
7454 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7455 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7456 session->flags = res->flags;
7457 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7458 if (res->flags & SESSION4_BACK_CHAN)
7459 memcpy(&session->bc_attrs, &res->bc_attrs,
7460 sizeof(session->bc_attrs));
8d35301d
AA		 7461}
7462
848f5bda
TM		 7463static int _nfs4_proc_create_session(struct nfs_client *clp,
7464 struct rpc_cred *cred)
fc931582
AA		 7465{
7466 struct nfs4_session *session = clp->cl_session;
7467 struct nfs41_create_session_args args = {
7468 .client = clp,
79969dd1
TM		 7469 .clientid = clp->cl_clientid,
7470 .seqid = clp->cl_seqid,
fc931582
AA		 7471 .cb_program = NFS4_CALLBACK,
7472 };
79969dd1
TM		 7473 struct nfs41_create_session_res res;
7474
fc931582
AA		 7475 struct rpc_message msg = {
7476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7477 .rpc_argp = &args,
7478 .rpc_resp = &res,
848f5bda 7479 .rpc_cred = cred,
fc931582
AA		 7480 };
7481 int status;
7482
7483 nfs4_init_channel_attrs(&args);
0f91421e 7484 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7485
1bd714f2 7486 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7487 trace_nfs4_create_session(clp, status);
fc931582 7488
43095d39 7489 if (!status) {
8d35301d 7490 /* Verify the session's negotiated channel_attrs values */
79969dd1 7491 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7492 /* Increment the clientid slot sequence id */
79969dd1
TM		 7493 if (clp->cl_seqid == res.seqid)
7494 clp->cl_seqid++;
7495 if (status)
7496 goto out;
7497 nfs4_update_session(session, &res);
fc931582 7498 }
79969dd1 7499out:
fc931582
AA		 7500 return status;
7501}
7502
7503/*
7504 * Issues a CREATE_SESSION operation to the server.
7505 * It is the responsibility of the caller to verify the session is
7506 * expired before calling this routine.
7507 */
848f5bda 7508int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7509{
7510 int status;
7511 unsigned *ptr;
fc931582
AA		 7512 struct nfs4_session *session = clp->cl_session;
7513
7514 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7515
848f5bda 7516 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7517 if (status)
7518 goto out;
7519
aacd5537
AA		 7520 /* Init or reset the session slot tables */
7521 status = nfs4_setup_session_slot_tables(session);
7522 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7523 if (status)
7524 goto out;
7525
7526 ptr = (unsigned *)&session->sess_id.data[0];
7527 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7528 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7529out:
7530 dprintk("<-- %s\n", __func__);
7531 return status;
7532}
7533
0f3e66c6
AA		 7534/*
7535 * Issue the over-the-wire RPC DESTROY_SESSION.
7536 * The caller must serialize access to this routine.
7537 */
848f5bda
TM		 7538int nfs4_proc_destroy_session(struct nfs4_session *session,
7539 struct rpc_cred *cred)
0f3e66c6 7540{
848f5bda
TM		 7541 struct rpc_message msg = {
7542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7543 .rpc_argp = session,
7544 .rpc_cred = cred,
7545 };
0f3e66c6 7546 int status = 0;
0f3e66c6
AA		 7547
7548 dprintk("--> nfs4_proc_destroy_session\n");
7549
7550 /* session is still being setup */
e11259f9
TM		 7551 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7552 return 0;
0f3e66c6 7553
1bd714f2 7554 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7555 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7556
7557 if (status)
08106ac7 7558 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7559 "Session has been destroyed regardless...\n", status);
7560
7561 dprintk("<-- nfs4_proc_destroy_session\n");
7562 return status;
7563}
7564
fc01cea9
AA		 7565/*
7566 * Renew the cl_session lease.
7567 */
d5f8d3fe
TM		 7568struct nfs4_sequence_data {
7569 struct nfs_client *clp;
7570 struct nfs4_sequence_args args;
7571 struct nfs4_sequence_res res;
7572};
7573
dc96aef9
AB		 7574static void nfs41_sequence_release(void *data)
7575{
d5f8d3fe
TM		 7576 struct nfs4_sequence_data *calldata = data;
7577 struct nfs_client *clp = calldata->clp;
dc96aef9 7578
7135840f
AB		 7579 if (atomic_read(&clp->cl_count) > 1)
7580 nfs4_schedule_state_renewal(clp);
7581 nfs_put_client(clp);
d5f8d3fe 7582 kfree(calldata);
dc96aef9
AB		 7583}
7584
aa5190d0
TM		 7585static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7586{
7587 switch(task->tk_status) {
7588 case -NFS4ERR_DELAY:
aa5190d0
TM		 7589 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7590 return -EAGAIN;
7591 default:
0400a6b0 7592 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7593 }
7594 return 0;
7595}
7596
dc96aef9 7597static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7598{
d5f8d3fe
TM		 7599 struct nfs4_sequence_data *calldata = data;
7600 struct nfs_client *clp = calldata->clp;
fc01cea9 7601
14516c3a
TM		 7602 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7603 return;
fc01cea9 7604
c6d01c6f 7605 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7606 if (task->tk_status < 0) {
7607 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7608 if (atomic_read(&clp->cl_count) == 1)
7609 goto out;
fc01cea9 7610
aa5190d0
TM		 7611 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7612 rpc_restart_call_prepare(task);
fc01cea9
AA		 7613 return;
7614 }
7615 }
fc01cea9 7616 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7617out:
fc01cea9
AA		 7618 dprintk("<-- %s\n", __func__);
7619}
7620
7621static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7622{
d5f8d3fe
TM		 7623 struct nfs4_sequence_data *calldata = data;
7624 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7625 struct nfs4_sequence_args *args;
7626 struct nfs4_sequence_res *res;
7627
fc01cea9
AA		 7628 args = task->tk_msg.rpc_argp;
7629 res = task->tk_msg.rpc_resp;
7630
d9afbd1b 7631 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7632}
7633
7634static const struct rpc_call_ops nfs41_sequence_ops = {
7635 .rpc_call_done = nfs41_sequence_call_done,
7636 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7637 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7638};
7639
8fe72bac
TM		 7640static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7641 struct rpc_cred *cred,
7642 bool is_privileged)
fc01cea9 7643{
d5f8d3fe 7644 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7645 struct rpc_message msg = {
7646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7647 .rpc_cred = cred,
7648 };
71ac6da9
TM		 7649 struct rpc_task_setup task_setup_data = {
7650 .rpc_client = clp->cl_rpcclient,
7651 .rpc_message = &msg,
8fe72bac 7652 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7653 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7654 };
fc01cea9 7655
7135840f 7656 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7657 return ERR_PTR(-EIO);
dfb4f309 7658 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7659 if (calldata == NULL) {
7135840f 7660 nfs_put_client(clp);
71ac6da9 7661 return ERR_PTR(-ENOMEM);
fc01cea9 7662 }
a9c92d6b 7663 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7664 if (is_privileged)
7665 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7666 msg.rpc_argp = &calldata->args;
7667 msg.rpc_resp = &calldata->res;
7668 calldata->clp = clp;
71ac6da9 7669 task_setup_data.callback_data = calldata;
fc01cea9 7670
71ac6da9
TM		 7671 return rpc_run_task(&task_setup_data);
7672}
7673
2f60ea6b 7674static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7675{
7676 struct rpc_task *task;
7677 int ret = 0;
7678
2f60ea6b 7679 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7680 return -EAGAIN;
8fe72bac 7681 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7682 if (IS_ERR(task))
7683 ret = PTR_ERR(task);
7684 else
bf294b41 7685 rpc_put_task_async(task);
71ac6da9
TM		 7686 dprintk("<-- %s status=%d\n", __func__, ret);
7687 return ret;
7688}
7689
7690static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7691{
7692 struct rpc_task *task;
7693 int ret;
7694
8fe72bac 7695 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7696 if (IS_ERR(task)) {
7697 ret = PTR_ERR(task);
7698 goto out;
7699 }
7700 ret = rpc_wait_for_completion_task(task);
be824167 7701 if (!ret)
71ac6da9
TM		 7702 ret = task->tk_status;
7703 rpc_put_task(task);
7704out:
7705 dprintk("<-- %s status=%d\n", __func__, ret);
7706 return ret;
fc01cea9
AA		 7707}
7708
fce5c838
RL		 7709struct nfs4_reclaim_complete_data {
7710 struct nfs_client *clp;
7711 struct nfs41_reclaim_complete_args arg;
7712 struct nfs41_reclaim_complete_res res;
7713};
7714
7715static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7716{
7717 struct nfs4_reclaim_complete_data *calldata = data;
7718
d9afbd1b
TM		 7719 nfs41_setup_sequence(calldata->clp->cl_session,
7720 &calldata->arg.seq_args,
7721 &calldata->res.seq_res,
7722 task);
fce5c838
RL		 7723}
7724
aa5190d0
TM		 7725static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7726{
7727 switch(task->tk_status) {
7728 case 0:
7729 case -NFS4ERR_COMPLETE_ALREADY:
7730 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7731 break;
7732 case -NFS4ERR_DELAY:
aa5190d0 7733 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7734 /* fall through */
7735 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7736 return -EAGAIN;
7737 default:
0400a6b0 7738 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7739 }
7740 return 0;
7741}
7742
fce5c838
RL		 7743static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7744{
7745 struct nfs4_reclaim_complete_data *calldata = data;
7746 struct nfs_client *clp = calldata->clp;
7747 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7748
7749 dprintk("--> %s\n", __func__);
14516c3a
TM		 7750 if (!nfs41_sequence_done(task, res))
7751 return;
fce5c838 7752
c6d01c6f 7753 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7754 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7755 rpc_restart_call_prepare(task);
7756 return;
7757 }
fce5c838
RL		 7758 dprintk("<-- %s\n", __func__);
7759}
7760
7761static void nfs4_free_reclaim_complete_data(void *data)
7762{
7763 struct nfs4_reclaim_complete_data *calldata = data;
7764
7765 kfree(calldata);
7766}
7767
7768static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7769 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7770 .rpc_call_done = nfs4_reclaim_complete_done,
7771 .rpc_release = nfs4_free_reclaim_complete_data,
7772};
7773
7774/*
7775 * Issue a global reclaim complete.
7776 */
965e9c23
TM		 7777static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7778 struct rpc_cred *cred)
fce5c838
RL		 7779{
7780 struct nfs4_reclaim_complete_data *calldata;
7781 struct rpc_task *task;
7782 struct rpc_message msg = {
7783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7784 .rpc_cred = cred,
fce5c838
RL		 7785 };
7786 struct rpc_task_setup task_setup_data = {
7787 .rpc_client = clp->cl_rpcclient,
7788 .rpc_message = &msg,
7789 .callback_ops = &nfs4_reclaim_complete_call_ops,
7790 .flags = RPC_TASK_ASYNC,
7791 };
7792 int status = -ENOMEM;
7793
7794 dprintk("--> %s\n", __func__);
8535b2be 7795 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7796 if (calldata == NULL)
7797 goto out;
7798 calldata->clp = clp;
7799 calldata->arg.one_fs = 0;
fce5c838 7800
a9c92d6b 7801 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7802 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7803 msg.rpc_argp = &calldata->arg;
7804 msg.rpc_resp = &calldata->res;
7805 task_setup_data.callback_data = calldata;
7806 task = rpc_run_task(&task_setup_data);
acf82b85 7807 if (IS_ERR(task)) {
fce5c838 7808 status = PTR_ERR(task);
acf82b85
DC		 7809 goto out;
7810 }
c34c32ea
AA		 7811 status = nfs4_wait_for_completion_rpc_task(task);
7812 if (status == 0)
7813 status = task->tk_status;
fce5c838 7814 rpc_put_task(task);
acf82b85 7815 return 0;
fce5c838
RL		 7816out:
7817 dprintk("<-- %s status=%d\n", __func__, status);
7818 return status;
7819}
b1f69b75
AA		 7820
7821static void
7822nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7823{
7824 struct nfs4_layoutget *lgp = calldata;
c31663d4 7825 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7826 struct nfs4_session *session = nfs4_get_session(server);
ab7d763e 7827 int ret;
b1f69b75
AA		 7828
7829 dprintk("--> %s\n", __func__);
c31663d4
FI		 7830 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7831 * right now covering the LAYOUTGET we are about to send.
7832 * However, that is not so catastrophic, and there seems
7833 * to be no way to prevent it completely.
7834 */
6ba7db34 7835 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7836 &lgp->res.seq_res, task))
b1f69b75 7837 return;
ab7d763e 7838 ret = pnfs_choose_layoutget_stateid(&lgp->args.stateid,
cf7d63f1 7839 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7840 &lgp->args.range,
ab7d763e
TM		 7841 lgp->args.ctx->state);
7842 if (ret < 0)
7843 rpc_exit(task, ret);
b1f69b75
AA		 7844}
7845
7846static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7847{
7848 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7849 struct inode *inode = lgp->args.inode;
7850 struct nfs_server *server = NFS_SERVER(inode);
7851 struct pnfs_layout_hdr *lo;
7852 struct nfs4_state *state = NULL;
ed7e5423 7853 unsigned long timeo, now, giveup;
b1f69b75 7854
ed7e5423 7855 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7856
6ba7db34 7857 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7858 goto out;
b1f69b75
AA		 7859
7860 switch (task->tk_status) {
7861 case 0:
ee314c2a 7862 goto out;
7c1e6e58
PT		 7863
7864 /*
7865 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7866 * on the file. set tk_status to -ENODATA to tell upper layer to
7867 * retry go inband.
7868 */
7869 case -NFS4ERR_LAYOUTUNAVAILABLE:
7870 task->tk_status = -ENODATA;
7871 goto out;
21b874c8
TM		 7872 /*
7873 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7874 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7875 */
7876 case -NFS4ERR_BADLAYOUT:
7877 goto out_overflow;
ed7e5423
BH		 7878 /*
7879 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7880 * (or clients) writing to the same RAID stripe except when
7881 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7882 */
b1f69b75 7883 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7884 if (lgp->args.minlength == 0)
7885 goto out_overflow;
ed7e5423
BH		 7886 /*
7887 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7888 * existing layout before getting a new one).
7889 */
b1f69b75 7890 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7891 timeo = rpc_get_timeout(task->tk_client);
7892 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7893 now = jiffies;
7894 if (time_after(giveup, now)) {
7895 unsigned long delay;
7896
7897 /* Delay for:
7898 * - Not less then NFS4_POLL_RETRY_MIN.
7899 * - One last time a jiffie before we give up
7900 * - exponential backoff (time_now minus start_attempt)
7901 */
7902 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7903 min((giveup - now - 1),
7904 now - lgp->args.timestamp));
7905
7906 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7907 __func__, delay);
7908 rpc_delay(task, delay);
2259f960
TM		 7909 /* Do not call nfs4_async_handle_error() */
7910 goto out_restart;
ed7e5423 7911 }
ee314c2a
TM		 7912 break;
7913 case -NFS4ERR_EXPIRED:
7914 case -NFS4ERR_BAD_STATEID:
7915 spin_lock(&inode->i_lock);
2259f960
TM		 7916 if (nfs4_stateid_match(&lgp->args.stateid,
7917 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7918 spin_unlock(&inode->i_lock);
7919 /* If the open stateid was bad, then recover it. */
7920 state = lgp->args.ctx->state;
2259f960
TM		 7921 break;
7922 }
7923 lo = NFS_I(inode)->layout;
7924 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7925 &lo->plh_stateid)) {
ee314c2a
TM		 7926 LIST_HEAD(head);
7927
defb8460
CH		 7928 /*
7929 * Mark the bad layout state as invalid, then retry
7930 * with the current stateid.
7931 */
8714d46d 7932 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7933 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7934 spin_unlock(&inode->i_lock);
ee314c2a 7935 pnfs_free_lseg_list(&head);
2259f960
TM		 7936 } else
7937 spin_unlock(&inode->i_lock);
7938 goto out_restart;
b1f69b75 7939 }
91ab4b4d 7940 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
2259f960 7941 goto out_restart;
ee314c2a 7942out:
b1f69b75 7943 dprintk("<-- %s\n", __func__);
21b874c8 7944 return;
2259f960
TM		 7945out_restart:
7946 task->tk_status = 0;
7947 rpc_restart_call_prepare(task);
7948 return;
21b874c8
TM		 7949out_overflow:
7950 task->tk_status = -EOVERFLOW;
7951 goto out;
b1f69b75
AA		 7952}
7953
8554116e
IK		 7954static size_t max_response_pages(struct nfs_server *server)
7955{
7956 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7957 return nfs_page_array_len(0, max_resp_sz);
7958}
7959
7960static void nfs4_free_pages(struct page **pages, size_t size)
7961{
7962 int i;
7963
7964 if (!pages)
7965 return;
7966
7967 for (i = 0; i < size; i++) {
7968 if (!pages[i])
7969 break;
7970 __free_page(pages[i]);
7971 }
7972 kfree(pages);
7973}
7974
7975static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7976{
7977 struct page **pages;
7978 int i;
7979
7980 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7981 if (!pages) {
7982 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7983 return NULL;
7984 }
7985
7986 for (i = 0; i < size; i++) {
7987 pages[i] = alloc_page(gfp_flags);
7988 if (!pages[i]) {
7989 dprintk("%s: failed to allocate page\n", __func__);
7990 nfs4_free_pages(pages, size);
7991 return NULL;
7992 }
7993 }
7994
7995 return pages;
7996}
7997
b1f69b75
AA		 7998static void nfs4_layoutget_release(void *calldata)
7999{
8000 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8001 struct inode *inode = lgp->args.inode;
8002 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8003 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8004
8005 dprintk("--> %s\n", __func__);
8554116e 8006 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8007 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8008 put_nfs_open_context(lgp->args.ctx);
8009 kfree(calldata);
8010 dprintk("<-- %s\n", __func__);
8011}
8012
8013static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8014 .rpc_call_prepare = nfs4_layoutget_prepare,
8015 .rpc_call_done = nfs4_layoutget_done,
8016 .rpc_release = nfs4_layoutget_release,
8017};
8018
a0b0a6e3
TM		 8019struct pnfs_layout_segment *
8020nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 8021{
a47970ff
WAA		 8022 struct inode *inode = lgp->args.inode;
8023 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8024 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8025 struct rpc_task *task;
8026 struct rpc_message msg = {
8027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8028 .rpc_argp = &lgp->args,
8029 .rpc_resp = &lgp->res,
6ab59344 8030 .rpc_cred = lgp->cred,
b1f69b75
AA		 8031 };
8032 struct rpc_task_setup task_setup_data = {
8033 .rpc_client = server->client,
8034 .rpc_message = &msg,
8035 .callback_ops = &nfs4_layoutget_call_ops,
8036 .callback_data = lgp,
8037 .flags = RPC_TASK_ASYNC,
8038 };
a0b0a6e3 8039 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 8040 int status = 0;
8041
8042 dprintk("--> %s\n", __func__);
8043
4bd5a980
PT		 8044 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8045 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8046
8554116e
IK		 8047 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8048 if (!lgp->args.layout.pages) {
8049 nfs4_layoutget_release(lgp);
a0b0a6e3 8050 return ERR_PTR(-ENOMEM);
8554116e
IK		 8051 }
8052 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 8053 lgp->args.timestamp = jiffies;
8554116e 8054
35124a09 8055 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8056 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8057 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8058
b1f69b75
AA		 8059 task = rpc_run_task(&task_setup_data);
8060 if (IS_ERR(task))
a0b0a6e3 8061 return ERR_CAST(task);
b1f69b75 8062 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 8063 if (status == 0)
8064 status = task->tk_status;
1037e6ea
TM		 8065 trace_nfs4_layoutget(lgp->args.ctx,
8066 &lgp->args.range,
8067 &lgp->res.range,
48c9579a 8068 &lgp->res.stateid,
1037e6ea 8069 status);
085b7a45
WAA		 8070 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8071 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8072 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8073 rpc_put_task(task);
8074 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8075 if (status)
8076 return ERR_PTR(status);
8077 return lseg;
b1f69b75
AA		 8078}
8079
cbe82603
BH		 8080static void
8081nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8082{
8083 struct nfs4_layoutreturn *lrp = calldata;
8084
8085 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8086 nfs41_setup_sequence(lrp->clp->cl_session,
8087 &lrp->args.seq_args,
8088 &lrp->res.seq_res,
8089 task);
cbe82603
BH		 8090}
8091
8092static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8093{
8094 struct nfs4_layoutreturn *lrp = calldata;
8095 struct nfs_server *server;
8096
8097 dprintk("--> %s\n", __func__);
8098
6ba7db34 8099 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8100 return;
8101
8102 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8103 switch (task->tk_status) {
8104 default:
8105 task->tk_status = 0;
8106 case 0:
8107 break;
8108 case -NFS4ERR_DELAY:
8478eaa1 8109 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8110 break;
d00c5d43 8111 rpc_restart_call_prepare(task);
cbe82603
BH		 8112 return;
8113 }
cbe82603
BH		 8114 dprintk("<-- %s\n", __func__);
8115}
8116
8117static void nfs4_layoutreturn_release(void *calldata)
8118{
8119 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8120 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8121 LIST_HEAD(freeme);
cbe82603
BH		 8122
8123 dprintk("--> %s\n", __func__);
849b286f 8124 spin_lock(&lo->plh_inode->i_lock);
0654cc72
TM		 8125 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8126 pnfs_mark_layout_returned_if_empty(lo);
849b286f
TM		 8127 if (lrp->res.lrs_present)
8128 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 8129 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8130 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8131 pnfs_free_lseg_list(&freeme);
70c3bd2b 8132 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8133 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8134 kfree(calldata);
8135 dprintk("<-- %s\n", __func__);
8136}
8137
8138static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8139 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8140 .rpc_call_done = nfs4_layoutreturn_done,
8141 .rpc_release = nfs4_layoutreturn_release,
8142};
8143
6c16605d 8144int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8145{
8146 struct rpc_task *task;
8147 struct rpc_message msg = {
8148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8149 .rpc_argp = &lrp->args,
8150 .rpc_resp = &lrp->res,
9556000d 8151 .rpc_cred = lrp->cred,
cbe82603
BH		 8152 };
8153 struct rpc_task_setup task_setup_data = {
1771c577 8154 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8155 .rpc_message = &msg,
8156 .callback_ops = &nfs4_layoutreturn_call_ops,
8157 .callback_data = lrp,
8158 };
6c16605d 8159 int status = 0;
cbe82603 8160
99ade3c7
AE		 8161 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8162 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8163 &task_setup_data.rpc_client, &msg);
8164
cbe82603 8165 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8166 if (!sync) {
8167 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8168 if (!lrp->inode) {
8169 nfs4_layoutreturn_release(lrp);
8170 return -EAGAIN;
8171 }
8172 task_setup_data.flags |= RPC_TASK_ASYNC;
8173 }
a9c92d6b 8174 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8175 task = rpc_run_task(&task_setup_data);
8176 if (IS_ERR(task))
8177 return PTR_ERR(task);
5a0ec8ac
TM		 8178 if (sync)
8179 status = task->tk_status;
48c9579a 8180 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8181 dprintk("<-- %s status=%d\n", __func__, status);
8182 rpc_put_task(task);
8183 return status;
8184}
8185
b1f69b75 8186static int
cd5875fe
TM		 8187_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8188 struct pnfs_device *pdev,
8189 struct rpc_cred *cred)
b1f69b75
AA		 8190{
8191 struct nfs4_getdeviceinfo_args args = {
8192 .pdev = pdev,
4e590803
TM		 8193 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8194 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8195 };
8196 struct nfs4_getdeviceinfo_res res = {
8197 .pdev = pdev,
8198 };
8199 struct rpc_message msg = {
8200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8201 .rpc_argp = &args,
8202 .rpc_resp = &res,
cd5875fe 8203 .rpc_cred = cred,
b1f69b75
AA		 8204 };
8205 int status;
8206
8207 dprintk("--> %s\n", __func__);
7c513058 8208 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8209 if (res.notification & ~args.notify_types)
8210 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8211 if (res.notification != args.notify_types)
8212 pdev->nocache = 1;
4e590803 8213
b1f69b75
AA		 8214 dprintk("<-- %s status=%d\n", __func__, status);
8215
8216 return status;
8217}
8218
cd5875fe
TM		 8219int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8220 struct pnfs_device *pdev,
8221 struct rpc_cred *cred)
b1f69b75
AA		 8222{
8223 struct nfs4_exception exception = { };
8224 int err;
8225
8226 do {
8227 err = nfs4_handle_exception(server,
cd5875fe 8228 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8229 &exception);
8230 } while (exception.retry);
8231 return err;
8232}
8233EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8234
863a3c6c
AA		 8235static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8236{
8237 struct nfs4_layoutcommit_data *data = calldata;
8238 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8239 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8240
d9afbd1b
TM		 8241 nfs41_setup_sequence(session,
8242 &data->args.seq_args,
8243 &data->res.seq_res,
8244 task);
863a3c6c
AA		 8245}
8246
8247static void
8248nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8249{
8250 struct nfs4_layoutcommit_data *data = calldata;
8251 struct nfs_server *server = NFS_SERVER(data->args.inode);
8252
6ba7db34 8253 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8254 return;
8255
8256 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8257 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8258 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8259 case -NFS4ERR_BADLAYOUT: /* no layout */
8260 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8261 task->tk_status = 0;
e59d27e0 8262 case 0:
e59d27e0
TM		 8263 break;
8264 default:
8478eaa1 8265 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8266 rpc_restart_call_prepare(task);
8267 return;
8268 }
8269 }
863a3c6c
AA		 8270}
8271
8272static void nfs4_layoutcommit_release(void *calldata)
8273{
8274 struct nfs4_layoutcommit_data *data = calldata;
8275
db29c089 8276 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8277 nfs_post_op_update_inode_force_wcc(data->args.inode,
8278 data->res.fattr);
863a3c6c 8279 put_rpccred(data->cred);
472e2594 8280 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8281 kfree(data);
8282}
8283
8284static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8285 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8286 .rpc_call_done = nfs4_layoutcommit_done,
8287 .rpc_release = nfs4_layoutcommit_release,
8288};
8289
8290int
ef311537 8291nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8292{
8293 struct rpc_message msg = {
8294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8295 .rpc_argp = &data->args,
8296 .rpc_resp = &data->res,
8297 .rpc_cred = data->cred,
8298 };
8299 struct rpc_task_setup task_setup_data = {
8300 .task = &data->task,
8301 .rpc_client = NFS_CLIENT(data->args.inode),
8302 .rpc_message = &msg,
8303 .callback_ops = &nfs4_layoutcommit_ops,
8304 .callback_data = data,
863a3c6c
AA		 8305 };
8306 struct rpc_task *task;
8307 int status = 0;
8308
b4839ebe
KM		 8309 dprintk("NFS: initiating layoutcommit call. sync %d "
8310 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8311 data->args.lastbytewritten,
8312 data->args.inode->i_ino);
8313
472e2594
TM		 8314 if (!sync) {
8315 data->inode = nfs_igrab_and_active(data->args.inode);
8316 if (data->inode == NULL) {
8317 nfs4_layoutcommit_release(data);
8318 return -EAGAIN;
8319 }
8320 task_setup_data.flags = RPC_TASK_ASYNC;
8321 }
a9c92d6b 8322 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8323 task = rpc_run_task(&task_setup_data);
8324 if (IS_ERR(task))
8325 return PTR_ERR(task);
472e2594
TM		 8326 if (sync)
8327 status = task->tk_status;
48c9579a 8328 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8329 dprintk("%s: status %d\n", __func__, status);
8330 rpc_put_task(task);
8331 return status;
8332}
fca78d6d 8333
97431204
AA		 8334/**
8335 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8336 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8337 */
fca78d6d
BS		 8338static int
8339_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8340 struct nfs_fsinfo *info,
8341 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8342{
8343 struct nfs41_secinfo_no_name_args args = {
8344 .style = SECINFO_STYLE_CURRENT_FH,
8345 };
8346 struct nfs4_secinfo_res res = {
8347 .flavors = flavors,
8348 };
8349 struct rpc_message msg = {
8350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8351 .rpc_argp = &args,
8352 .rpc_resp = &res,
8353 };
b1b3e136 8354 struct rpc_clnt *clnt = server->client;
7cb852df 8355 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8356 int status;
8357
8358 if (use_integrity) {
8359 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8360 cred = nfs4_get_clid_cred(server->nfs_client);
8361 msg.rpc_cred = cred;
b1b3e136
WAA		 8362 }
8363
8364 dprintk("--> %s\n", __func__);
8365 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8366 &res.seq_res, 0);
8367 dprintk("<-- %s status=%d\n", __func__, status);
8368
7cb852df
WAA		 8369 if (cred)
8370 put_rpccred(cred);
b1b3e136
WAA		 8371
8372 return status;
fca78d6d
BS		 8373}
8374
8375static int
8376nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8377 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8378{
8379 struct nfs4_exception exception = { };
8380 int err;
8381 do {
b1b3e136
WAA		 8382 /* first try using integrity protection */
8383 err = -NFS4ERR_WRONGSEC;
8384
8385 /* try to use integrity protection with machine cred */
8386 if (_nfs4_is_integrity_protected(server->nfs_client))
8387 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8388 flavors, true);
8389
8390 /*
8391 * if unable to use integrity protection, or SECINFO with
8392 * integrity protection returns NFS4ERR_WRONGSEC (which is
8393 * disallowed by spec, but exists in deployed servers) use
8394 * the current filesystem's rpc_client and the user cred.
8395 */
8396 if (err == -NFS4ERR_WRONGSEC)
8397 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8398 flavors, false);
8399
fca78d6d
BS		 8400 switch (err) {
8401 case 0:
8402 case -NFS4ERR_WRONGSEC:
78b19bae 8403 case -ENOTSUPP:
05e9cfb4 8404 goto out;
fca78d6d
BS		 8405 default:
8406 err = nfs4_handle_exception(server, err, &exception);
8407 }
8408 } while (exception.retry);
05e9cfb4 8409out:
fca78d6d
BS		 8410 return err;
8411}
8412
8413static int
8414nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8415 struct nfs_fsinfo *info)
8416{
8417 int err;
8418 struct page *page;
367156d9 8419 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8420 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8421 struct nfs4_secinfo4 *secinfo;
8422 int i;
fca78d6d
BS		 8423
8424 page = alloc_page(GFP_KERNEL);
8425 if (!page) {
8426 err = -ENOMEM;
8427 goto out;
8428 }
8429
8430 flavors = page_address(page);
8431 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8432
8433 /*
8434 * Fall back on "guess and check" method if
8435 * the server doesn't support SECINFO_NO_NAME
8436 */
78b19bae 8437 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8438 err = nfs4_find_root_sec(server, fhandle, info);
8439 goto out_freepage;
8440 }
8441 if (err)
8442 goto out_freepage;
8443
58a8cf12
WAA		 8444 for (i = 0; i < flavors->num_flavors; i++) {
8445 secinfo = &flavors->flavors[i];
8446
8447 switch (secinfo->flavor) {
8448 case RPC_AUTH_NULL:
8449 case RPC_AUTH_UNIX:
8450 case RPC_AUTH_GSS:
8451 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8452 &secinfo->flavor_info);
8453 break;
8454 default:
8455 flavor = RPC_AUTH_MAXFLAVOR;
8456 break;
8457 }
8458
4d4b69dd
WAA		 8459 if (!nfs_auth_info_match(&server->auth_info, flavor))
8460 flavor = RPC_AUTH_MAXFLAVOR;
8461
58a8cf12
WAA		 8462 if (flavor != RPC_AUTH_MAXFLAVOR) {
8463 err = nfs4_lookup_root_sec(server, fhandle,
8464 info, flavor);
8465 if (!err)
8466 break;
8467 }
8468 }
8469
8470 if (flavor == RPC_AUTH_MAXFLAVOR)
8471 err = -EPERM;
fca78d6d
BS		 8472
8473out_freepage:
8474 put_page(page);
8475 if (err == -EACCES)
8476 return -EPERM;
8477out:
8478 return err;
8479}
1cab0652 8480
ab7cb0df
TM		 8481static int _nfs41_test_stateid(struct nfs_server *server,
8482 nfs4_stateid *stateid,
8483 struct rpc_cred *cred)
7d974794
BS		 8484{
8485 int status;
8486 struct nfs41_test_stateid_args args = {
1cab0652 8487 .stateid = stateid,
7d974794
BS		 8488 };
8489 struct nfs41_test_stateid_res res;
8490 struct rpc_message msg = {
8491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8492 .rpc_argp = &args,
8493 .rpc_resp = &res,
ab7cb0df 8494 .rpc_cred = cred,
7d974794 8495 };
3787d506
WAA		 8496 struct rpc_clnt *rpc_client = server->client;
8497
8498 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8499 &rpc_client, &msg);
1cab0652 8500
38527b15 8501 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8502 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8503 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8504 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8505 &args.seq_args, &res.seq_res);
38527b15
CL		 8506 if (status != NFS_OK) {
8507 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8508 return status;
38527b15
CL		 8509 }
8510 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8511 return -res.status;
7d974794
BS		 8512}
8513
38527b15
CL		 8514/**
8515 * nfs41_test_stateid - perform a TEST_STATEID operation
8516 *
8517 * @server: server / transport on which to perform the operation
8518 * @stateid: state ID to test
ab7cb0df 8519 * @cred: credential
38527b15
CL		 8520 *
8521 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8522 * Otherwise a negative NFS4ERR value is returned if the operation
8523 * failed or the state ID is not currently valid.
8524 */
ab7cb0df
TM		 8525static int nfs41_test_stateid(struct nfs_server *server,
8526 nfs4_stateid *stateid,
8527 struct rpc_cred *cred)
7d974794
BS		 8528{
8529 struct nfs4_exception exception = { };
8530 int err;
8531 do {
ab7cb0df 8532 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8533 if (err != -NFS4ERR_DELAY)
8534 break;
8535 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8536 } while (exception.retry);
8537 return err;
8538}
9aeda35f 8539
7c1d5fae
TM		 8540struct nfs_free_stateid_data {
8541 struct nfs_server *server;
8542 struct nfs41_free_stateid_args args;
9aeda35f 8543 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8544};
8545
8546static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8547{
8548 struct nfs_free_stateid_data *data = calldata;
8549 nfs41_setup_sequence(nfs4_get_session(data->server),
8550 &data->args.seq_args,
8551 &data->res.seq_res,
8552 task);
8553}
8554
8555static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8556{
8557 struct nfs_free_stateid_data *data = calldata;
8558
8559 nfs41_sequence_done(task, &data->res.seq_res);
8560
8561 switch (task->tk_status) {
8562 case -NFS4ERR_DELAY:
8478eaa1 8563 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8564 rpc_restart_call_prepare(task);
8565 }
8566}
8567
8568static void nfs41_free_stateid_release(void *calldata)
8569{
8570 kfree(calldata);
8571}
8572
17f26b12 8573static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8574 .rpc_call_prepare = nfs41_free_stateid_prepare,
8575 .rpc_call_done = nfs41_free_stateid_done,
8576 .rpc_release = nfs41_free_stateid_release,
8577};
8578
8579static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8580 nfs4_stateid *stateid,
ab7cb0df 8581 struct rpc_cred *cred,
7c1d5fae
TM		 8582 bool privileged)
8583{
9aeda35f
BS		 8584 struct rpc_message msg = {
8585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8586 .rpc_cred = cred,
9aeda35f 8587 };
7c1d5fae
TM		 8588 struct rpc_task_setup task_setup = {
8589 .rpc_client = server->client,
8590 .rpc_message = &msg,
8591 .callback_ops = &nfs41_free_stateid_ops,
8592 .flags = RPC_TASK_ASYNC,
8593 };
8594 struct nfs_free_stateid_data *data;
9aeda35f 8595
3787d506
WAA		 8596 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8597 &task_setup.rpc_client, &msg);
8598
38527b15 8599 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8600 data = kmalloc(sizeof(*data), GFP_NOFS);
8601 if (!data)
8602 return ERR_PTR(-ENOMEM);
8603 data->server = server;
8604 nfs4_stateid_copy(&data->args.stateid, stateid);
8605
8606 task_setup.callback_data = data;
8607
8608 msg.rpc_argp = &data->args;
8609 msg.rpc_resp = &data->res;
a9c92d6b 8610 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8611 if (privileged)
8612 nfs4_set_sequence_privileged(&data->args.seq_args);
8613
8614 return rpc_run_task(&task_setup);
9aeda35f
BS		 8615}
8616
38527b15
CL		 8617/**
8618 * nfs41_free_stateid - perform a FREE_STATEID operation
8619 *
8620 * @server: server / transport on which to perform the operation
8621 * @stateid: state ID to release
ab7cb0df 8622 * @cred: credential
38527b15
CL		 8623 *
8624 * Returns NFS_OK if the server freed "stateid". Otherwise a
8625 * negative NFS4ERR value is returned.
8626 */
ab7cb0df
TM		 8627static int nfs41_free_stateid(struct nfs_server *server,
8628 nfs4_stateid *stateid,
8629 struct rpc_cred *cred)
9aeda35f 8630{
7c1d5fae
TM		 8631 struct rpc_task *task;
8632 int ret;
8633
ab7cb0df 8634 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8635 if (IS_ERR(task))
8636 return PTR_ERR(task);
8637 ret = rpc_wait_for_completion_task(task);
8638 if (!ret)
8639 ret = task->tk_status;
8640 rpc_put_task(task);
8641 return ret;
9aeda35f 8642}
36281caa 8643
f1cdae87
JL		 8644static void
8645nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8646{
8647 struct rpc_task *task;
ab7cb0df 8648 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8649
ab7cb0df 8650 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8651 nfs4_free_lock_state(server, lsp);
8652 if (IS_ERR(task))
f1cdae87 8653 return;
c8b2d0bf 8654 rpc_put_task(task);
c8b2d0bf
TM		 8655}
8656
36281caa
TM		 8657static bool nfs41_match_stateid(const nfs4_stateid *s1,
8658 const nfs4_stateid *s2)
8659{
2d2f24ad 8660 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8661 return false;
8662
2d2f24ad 8663 if (s1->seqid == s2->seqid)
36281caa 8664 return true;
2d2f24ad 8665 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8666 return true;
8667
8668 return false;
8669}
8670
557134a3
AA		 8671#endif /* CONFIG_NFS_V4_1 */
8672
36281caa
TM		 8673static bool nfs4_match_stateid(const nfs4_stateid *s1,
8674 const nfs4_stateid *s2)
8675{
f597c537 8676 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8677}
8678
8679
17280175 8680static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8681 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8682 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8683 .recover_open = nfs4_open_reclaim,
8684 .recover_lock = nfs4_lock_reclaim,
591d71cb 8685 .establish_clid = nfs4_init_clientid,
05f4c350 8686 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8687};
8688
591d71cb 8689#if defined(CONFIG_NFS_V4_1)
17280175 8690static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8691 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8692 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8693 .recover_open = nfs4_open_reclaim,
8694 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8695 .establish_clid = nfs41_init_clientid,
fce5c838 8696 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8697 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8698};
8699#endif /* CONFIG_NFS_V4_1 */
8700
17280175 8701static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8702 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8703 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8704 .recover_open = nfs40_open_expired,
591d71cb
AA		 8705 .recover_lock = nfs4_lock_expired,
8706 .establish_clid = nfs4_init_clientid,
8707};
8708
8709#if defined(CONFIG_NFS_V4_1)
17280175 8710static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8711 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8712 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8713 .recover_open = nfs41_open_expired,
8714 .recover_lock = nfs41_lock_expired,
4d643d1d 8715 .establish_clid = nfs41_init_clientid,
1da177e4 8716};
591d71cb 8717#endif /* CONFIG_NFS_V4_1 */
1da177e4 8718
17280175 8719static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8720 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8721 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8722 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8723};
8724
8725#if defined(CONFIG_NFS_V4_1)
17280175 8726static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8727 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8728 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8729 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8730};
8731#endif
8732
ec011fe8 8733static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8734 .get_locations = _nfs40_proc_get_locations,
44c99933 8735 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8736};
8737
8738#if defined(CONFIG_NFS_V4_1)
8739static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8740 .get_locations = _nfs41_proc_get_locations,
44c99933 8741 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8742};
8743#endif /* CONFIG_NFS_V4_1 */
8744
97dc1359
TM		 8745static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8746 .minor_version = 0,
39c6daae
TM		 8747 .init_caps = NFS_CAP_READDIRPLUS
8748 | NFS_CAP_ATOMIC_OPEN
39c6daae 8749 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8750 .init_client = nfs40_init_client,
8751 .shutdown_client = nfs40_shutdown_client,
36281caa 8752 .match_stateid = nfs4_match_stateid,
fca78d6d 8753 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8754 .free_lock_state = nfs4_release_lockowner,
63f5f796 8755 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8756 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8757 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8758 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8759 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8760 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8761};
8762
8763#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8764static struct nfs_seqid *
8765nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8766{
8767 return NULL;
8768}
8769
97dc1359
TM		 8770static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8771 .minor_version = 1,
39c6daae
TM		 8772 .init_caps = NFS_CAP_READDIRPLUS
8773 | NFS_CAP_ATOMIC_OPEN
3b66486c 8774 | NFS_CAP_POSIX_LOCK
49f9a0fa 8775 | NFS_CAP_STATEID_NFSV41
e983120e 8776 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8777 .init_client = nfs41_init_client,
8778 .shutdown_client = nfs41_shutdown_client,
36281caa 8779 .match_stateid = nfs41_match_stateid,
fca78d6d 8780 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8781 .free_lock_state = nfs41_free_lock_state,
63f5f796 8782 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8783 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8784 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8785 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8786 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8787 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8788};
8789#endif
8790
42c2c424
SD		 8791#if defined(CONFIG_NFS_V4_2)
8792static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8793 .minor_version = 2,
7017310a
BS		 8794 .init_caps = NFS_CAP_READDIRPLUS
8795 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8796 | NFS_CAP_POSIX_LOCK
8797 | NFS_CAP_STATEID_NFSV41
e983120e 8798 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8799 | NFS_CAP_ALLOCATE
624bd5b7 8800 | NFS_CAP_DEALLOCATE
6c5a0d89 8801 | NFS_CAP_SEEK
e5341f3a
PT		 8802 | NFS_CAP_LAYOUTSTATS
8803 | NFS_CAP_CLONE,
abf79bb3
CL		 8804 .init_client = nfs41_init_client,
8805 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8806 .match_stateid = nfs41_match_stateid,
8807 .find_root_sec = nfs41_find_root_sec,
7017310a 8808 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8809 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8810 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8811 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8812 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8813 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8814 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8815};
8816#endif
8817
97dc1359
TM		 8818const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8819 [0] = &nfs_v4_0_minor_ops,
8820#if defined(CONFIG_NFS_V4_1)
8821 [1] = &nfs_v4_1_minor_ops,
8822#endif
42c2c424
SD		 8823#if defined(CONFIG_NFS_V4_2)
8824 [2] = &nfs_v4_2_minor_ops,
8825#endif
97dc1359
TM		 8826};
8827
c4803c49
AG		 8828ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
8829{
8830 ssize_t error, error2;
8831
8832 error = generic_listxattr(dentry, list, size);
8833 if (error < 0)
8834 return error;
8835 if (list) {
8836 list += error;
8837 size -= error;
8838 }
8839
8840 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8841 if (error2 < 0)
8842 return error2;
8843 return error + error2;
8844}
8845
17f26b12 8846static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8847 .create = nfs_create,
8848 .lookup = nfs_lookup,
8849 .atomic_open = nfs_atomic_open,
8850 .link = nfs_link,
8851 .unlink = nfs_unlink,
8852 .symlink = nfs_symlink,
8853 .mkdir = nfs_mkdir,
8854 .rmdir = nfs_rmdir,
8855 .mknod = nfs_mknod,
8856 .rename = nfs_rename,
8857 .permission = nfs_permission,
8858 .getattr = nfs_getattr,
8859 .setattr = nfs_setattr,
8860 .getxattr = generic_getxattr,
8861 .setxattr = generic_setxattr,
c4803c49 8862 .listxattr = nfs4_listxattr,
73a79706
BS		 8863 .removexattr = generic_removexattr,
8864};
8865
92e1d5be 8866static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8867 .permission = nfs_permission,
8868 .getattr = nfs_getattr,
8869 .setattr = nfs_setattr,
64c2ce8b
AK		 8870 .getxattr = generic_getxattr,
8871 .setxattr = generic_setxattr,
c4803c49 8872 .listxattr = nfs4_listxattr,
64c2ce8b 8873 .removexattr = generic_removexattr,
6b3b5496
BF		 8874};
8875
509de811 8876const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8877 .version = 4, /* protocol version */
8878 .dentry_ops = &nfs4_dentry_operations,
8879 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8880 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8881 .file_ops = &nfs4_file_operations,
1da177e4 8882 .getroot = nfs4_proc_get_root,
281cad46 8883 .submount = nfs4_submount,
ff9099f2 8884 .try_mount = nfs4_try_mount,
1da177e4
LT		 8885 .getattr = nfs4_proc_getattr,
8886 .setattr = nfs4_proc_setattr,
8887 .lookup = nfs4_proc_lookup,
8888 .access = nfs4_proc_access,
8889 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8890 .create = nfs4_proc_create,
8891 .remove = nfs4_proc_remove,
8892 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8893 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8894 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8895 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8896 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8897 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8898 .link = nfs4_proc_link,
8899 .symlink = nfs4_proc_symlink,
8900 .mkdir = nfs4_proc_mkdir,
8901 .rmdir = nfs4_proc_remove,
8902 .readdir = nfs4_proc_readdir,
8903 .mknod = nfs4_proc_mknod,
8904 .statfs = nfs4_proc_statfs,
8905 .fsinfo = nfs4_proc_fsinfo,
8906 .pathconf = nfs4_proc_pathconf,
e9326dca 8907 .set_capabilities = nfs4_server_capabilities,
1da177e4 8908 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8909 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8910 .read_setup = nfs4_proc_read_setup,
ec06c096 8911 .read_done = nfs4_read_done,
1da177e4 8912 .write_setup = nfs4_proc_write_setup,
788e7a89 8913 .write_done = nfs4_write_done,
1da177e4 8914 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8915 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8916 .commit_done = nfs4_commit_done,
1da177e4 8917 .lock = nfs4_proc_lock,
e50a1c2e 8918 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8919 .close_context = nfs4_close_context,
2b484297 8920 .open_context = nfs4_atomic_open,
011e2a7f 8921 .have_delegation = nfs4_have_delegation,
57ec14c5 8922 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8923 .alloc_client = nfs4_alloc_client,
45a52a02 8924 .init_client = nfs4_init_client,
cdb7eced 8925 .free_client = nfs4_free_client,
1179acc6
BS		 8926 .create_server = nfs4_create_server,
8927 .clone_server = nfs_clone_server,
1da177e4
LT		 8928};
8929
64c2ce8b 8930static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 8931 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 8932 .list = nfs4_xattr_list_nfs4_acl,
8933 .get = nfs4_xattr_get_nfs4_acl,
8934 .set = nfs4_xattr_set_nfs4_acl,
8935};
8936
8937const struct xattr_handler *nfs4_xattr_handlers[] = {
8938 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8939#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8940 &nfs4_xattr_nfs4_label_handler,
8941#endif
64c2ce8b
AK		 8942 NULL
8943};
8944
1da177e4
LT		 8945/*
8946 * Local variables:
8947 * c-basic-offset: 8
8948 * End:
8949 */
Linux 6.x block layer and io_uring tree(s)