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nfs: plug memory leak when ->prepare_layoutcommit fails
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
5ba12443
TM		 359 case -NFS4ERR_DELEG_REVOKED:
360 case -NFS4ERR_ADMIN_REVOKED:
361 case -NFS4ERR_BAD_STATEID:
011e2a7f 362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 363 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 364 exception->retry = 1;
365 return 0;
366 }
367 if (state == NULL)
368 break;
5d422301
TM		 369 ret = nfs4_schedule_stateid_recovery(server, state);
370 if (ret < 0)
371 break;
3114ea7a 372 goto wait_on_recovery;
0ced63d1 373 case -NFS4ERR_EXPIRED:
5d422301
TM		 374 if (state != NULL) {
375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
378 }
65de872e 379 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 380 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 381 nfs4_schedule_lease_recovery(clp);
382 goto wait_on_recovery;
519ae255
CL		 383 case -NFS4ERR_MOVED:
384 ret = nfs4_schedule_migration_recovery(server);
385 if (ret < 0)
386 break;
387 goto wait_on_recovery;
8ef2f8d4
CL		 388 case -NFS4ERR_LEASE_MOVED:
389 nfs4_schedule_lease_moved_recovery(clp);
390 goto wait_on_recovery;
03391693 391#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 392 case -NFS4ERR_BADSESSION:
393 case -NFS4ERR_BADSLOT:
394 case -NFS4ERR_BAD_HIGH_SLOT:
395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
396 case -NFS4ERR_DEADSESSION:
397 case -NFS4ERR_SEQ_FALSE_RETRY:
398 case -NFS4ERR_SEQ_MISORDERED:
399 dprintk("%s ERROR: %d Reset session\n", __func__,
400 errorcode);
9f594791 401 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 402 goto wait_on_recovery;
03391693 403#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 404 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 405 if (exception->timeout > HZ) {
406 /* We have retried a decent amount, time to
407 * fail
408 */
409 ret = -EBUSY;
410 break;
411 }
65de872e
TM		 412 case -NFS4ERR_GRACE:
413 case -NFS4ERR_DELAY:
414 ret = nfs4_delay(server->client, &exception->timeout);
415 if (ret != 0)
416 break;
a8a4ae3a 417 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 418 case -NFS4ERR_OLD_STATEID:
419 exception->retry = 1;
b064eca2
TM		 420 break;
421 case -NFS4ERR_BADOWNER:
422 /* The following works around a Linux server bug! */
423 case -NFS4ERR_BADNAME:
424 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
425 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
426 exception->retry = 1;
427 printk(KERN_WARNING "NFS: v4 server %s "
428 "does not accept raw "
429 "uid/gids. "
430 "Reenabling the idmapper.\n",
431 server->nfs_client->cl_hostname);
432 }
65de872e
TM		 433 }
434 /* We failed to handle the error */
435 return nfs4_map_errors(ret);
0400a6b0 436wait_on_recovery:
a2c0b9e2 437 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 438 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
439 return -EIO;
a2c0b9e2
TM		 440 if (ret == 0)
441 exception->retry = 1;
442 return ret;
65de872e
TM		 443}
444
a5250def
WAA		 445/*
446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
447 * or 'false' otherwise.
448 */
449static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
450{
451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
452
453 if (flavor == RPC_AUTH_GSS_KRB5I ||
454 flavor == RPC_AUTH_GSS_KRB5P)
455 return true;
456
457 return false;
458}
65de872e 459
452e9352 460static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 461{
1da177e4
LT		 462 spin_lock(&clp->cl_lock);
463 if (time_before(clp->cl_last_renewal,timestamp))
464 clp->cl_last_renewal = timestamp;
465 spin_unlock(&clp->cl_lock);
466}
467
452e9352
TM		 468static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
469{
be824167
TM		 470 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
452e9352
TM		 474}
475
2a3eb2b9
CL		 476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
be3a5d23
TM		 482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
cb04ad2a
PT		 497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
3bd2384a 501{
3bd2384a
CL		 502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
cb04ad2a 536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
cab92c19 544 if (slot == NULL)
3bd2384a
CL		 545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
cccef3b9
AA		 558#if defined(CONFIG_NFS_V4_1)
559
d185a334 560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 561{
e3725ec0 562 struct nfs4_session *session;
13615871 563 struct nfs4_slot_table *tbl;
a13ce7c6 564 struct nfs4_slot *slot = res->sr_slot;
c10e4498 565 bool send_new_highest_used_slotid = false;
13615871 566
a13ce7c6 567 tbl = slot->table;
e3725ec0 568 session = tbl->session;
ea028ac9 569
35dc1d74 570 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
a13ce7c6 577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
a13ce7c6 581 nfs4_free_slot(tbl, slot);
c10e4498
TM		 582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
b75ad4cd 585out_unlock:
35dc1d74 586 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 587 res->sr_slot = NULL;
c10e4498
TM		 588 if (send_new_highest_used_slotid)
589 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 590}
591
f9c96fcc 592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 593{
e3725ec0 594 struct nfs4_session *session;
a13ce7c6 595 struct nfs4_slot *slot = res->sr_slot;
14516c3a 596 struct nfs_client *clp;
ac20d163 597 bool interrupted = false;
85563073 598 int ret = 1;
b0df806c 599
a13ce7c6
TM		 600 if (slot == NULL)
601 goto out_noaction;
468f8613
BS		 602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
b0df806c
AA		 604 goto out;
605
e3725ec0 606 session = slot->table->session;
933602e3 607
ac20d163
TM		 608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
2f92ae34 613 trace_nfs4_sequence_done(session, res);
691daf3b 614 /* Check the SEQUENCE operation status */
14516c3a
TM		 615 switch (res->sr_status) {
616 case 0:
b0df806c 617 /* Update the slot's sequence and clientid lease timer */
933602e3 618 ++slot->seq_nr;
e3725ec0 619 clp = session->clp;
8e63b6a8 620 do_renew_lease(clp, res->sr_timestamp);
0629e370 621 /* Check sequence flags */
b15c7cdd 622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 623 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 624 break;
ac20d163
TM		 625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
14516c3a
TM		 634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
df2fabff 639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 640 __func__,
df2fabff 641 slot->slot_nr,
933602e3 642 slot->seq_nr);
14516c3a 643 goto out_retry;
85563073
TM		 644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
e8794440
TM		 649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
e8794440
TM		 659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
8e63b6a8
TM		 663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
e8794440
TM		 668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
14516c3a
TM		 671 default:
672 /* Just update the slot sequence no. */
933602e3 673 ++slot->seq_nr;
b0df806c
AA		 674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 678 nfs41_sequence_free_slot(res);
a13ce7c6 679out_noaction:
85563073 680 return ret;
e8794440
TM		 681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
14516c3a 687out_retry:
d05dd4e9 688 if (!rpc_restart_call(task))
14516c3a
TM		 689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
b0df806c 692}
f9c96fcc 693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 694
2c4b131d 695int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455 702}
2c4b131d 703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 704
dc70d7b3 705int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
ce5039c1
AA		 708 struct rpc_task *task)
709{
fbcd4abc
AA		 710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 712
713 dprintk("--> %s\n", __func__);
ce5039c1 714 /* slot already allocated? */
dfb4f309 715 if (res->sr_slot != NULL)
d9afbd1b 716 goto out_success;
ce5039c1 717
fbcd4abc
AA		 718 tbl = &session->fc_slot_table;
719
69d206b5
TM		 720 task->tk_timeout = 0;
721
fbcd4abc 722 spin_lock(&tbl->slot_tbl_lock);
774d5f14 723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 724 !args->sa_privileged) {
0b1c8fc4 725 /* The state manager will wait until the slot table is empty */
0b1c8fc4 726 dprintk("%s session is draining\n", __func__);
7b939a3f 727 goto out_sleep;
689cf5c1
AB		 728 }
729
2dc03b7f 730 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
fbcd4abc 735 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 736 goto out_sleep;
fbcd4abc
AA		 737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
2b2fa717 740 args->sa_slot = slot;
fbcd4abc 741
e8d92382 742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 743 slot->slot_nr, slot->seq_nr);
fbcd4abc 744
dfb4f309 745 res->sr_slot = slot;
8e63b6a8 746 res->sr_timestamp = jiffies;
2a6e26cd 747 res->sr_status_flags = 0;
fbcd4abc
AA		 748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
2f92ae34 753 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 754out_success:
755 rpc_call_start(task);
ce5039c1 756 return 0;
7b939a3f 757out_sleep:
8fe72bac
TM		 758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
1e1093c7
TM		 760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
ce5039c1 766}
dc70d7b3 767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 768
5a580e0a
CL		 769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
ce5039c1 773{
035168ab 774 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 775 int ret = 0;
776
3bd2384a 777 if (!session)
cb04ad2a
PT		 778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
cb04ad2a
PT		 820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
9915ea7e
CL		 822}
823
2c4b131d
PT		 824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
9915ea7e 826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
2c4b131d 829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 830
831#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
7c513058
BS		 851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
ce5039c1
AA		 853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
8fe72bac 855 struct nfs4_sequence_res *res)
ce5039c1
AA		 856{
857 int ret;
858 struct rpc_task *task;
9915ea7e 859 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 860 struct nfs4_call_sync_data data = {
035168ab 861 .seq_server = server,
ce5039c1
AA		 862 .seq_args = args,
863 .seq_res = res,
ce5039c1
AA		 864 };
865 struct rpc_task_setup task_setup = {
7c513058 866 .rpc_client = clnt,
ce5039c1 867 .rpc_message = msg,
9915ea7e 868 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 869 .callback_data = &data
870 };
871
ce5039c1
AA		 872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
7c513058
BS		 882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
e73b83f2
BS		 884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
a9c92d6b 889 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 891}
cccef3b9 892
38478b24 893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 894{
38478b24 895 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 896
38478b24 897 spin_lock(&dir->i_lock);
359d7d1c 898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 899 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 900 nfs_force_lookup_revalidate(dir);
a9a4a87a 901 dir->i_version = cinfo->after;
3235b403 902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 903 nfs_fscache_invalidate(dir);
38478b24 904 spin_unlock(&dir->i_lock);
1da177e4
LT		 905}
906
e56e0b78 907struct nfs4_opendata {
c6d00e63 908 struct kref kref;
e56e0b78
TM		 909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
cdd4e68b
TM		 911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
6926afd1
TM		 913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
e56e0b78 915 struct nfs_fattr f_attr;
1775fd3e 916 struct nfs4_label *f_label;
e56e0b78 917 struct dentry *dir;
82a2c1b7 918 struct dentry *dentry;
e56e0b78 919 struct nfs4_state_owner *owner;
aac00a8d 920 struct nfs4_state *state;
e56e0b78 921 struct iattr attrs;
26e976a8 922 unsigned long timestamp;
3e309914 923 unsigned int rpc_done : 1;
5bc2afc2 924 unsigned int file_created : 1;
bdeca1b7 925 unsigned int is_recover : 1;
24ac23ab
TM		 926 int rpc_status;
927 int cancelled;
e56e0b78
TM		 928};
929
49f9a0fa
TM		 930static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
931 int err, struct nfs4_exception *exception)
932{
933 if (err != -EINVAL)
934 return false;
935 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
936 return false;
937 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
938 exception->retry = 1;
939 return true;
940}
941
6ae37339
TM		 942static u32
943nfs4_map_atomic_open_share(struct nfs_server *server,
944 fmode_t fmode, int openflags)
945{
946 u32 res = 0;
947
948 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
949 case FMODE_READ:
950 res = NFS4_SHARE_ACCESS_READ;
951 break;
952 case FMODE_WRITE:
953 res = NFS4_SHARE_ACCESS_WRITE;
954 break;
955 case FMODE_READ|FMODE_WRITE:
956 res = NFS4_SHARE_ACCESS_BOTH;
957 }
958 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
959 goto out;
960 /* Want no delegation if we're using O_DIRECT */
961 if (openflags & O_DIRECT)
962 res |= NFS4_SHARE_WANT_NO_DELEG;
963out:
964 return res;
965}
966
49f9a0fa
TM		 967static enum open_claim_type4
968nfs4_map_atomic_open_claim(struct nfs_server *server,
969 enum open_claim_type4 claim)
970{
971 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
972 return claim;
973 switch (claim) {
974 default:
975 return claim;
976 case NFS4_OPEN_CLAIM_FH:
977 return NFS4_OPEN_CLAIM_NULL;
978 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
979 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
980 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
981 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
982 }
983}
2ced46c2
TM		 984
985static void nfs4_init_opendata_res(struct nfs4_opendata *p)
986{
987 p->o_res.f_attr = &p->f_attr;
1775fd3e 988 p->o_res.f_label = p->f_label;
c1d51931
TM		 989 p->o_res.seqid = p->o_arg.seqid;
990 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 991 p->o_res.server = p->o_arg.server;
5f657530 992 p->o_res.access_request = p->o_arg.access;
2ced46c2 993 nfs_fattr_init(&p->f_attr);
6926afd1 994 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 995}
996
82a2c1b7 997static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 998 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 999 const struct iattr *attrs,
1775fd3e 1000 struct nfs4_label *label,
4a1c0893 1001 enum open_claim_type4 claim,
8535b2be 1002 gfp_t gfp_mask)
e56e0b78 1003{
82a2c1b7 1004 struct dentry *parent = dget_parent(dentry);
2b0143b5 1005 struct inode *dir = d_inode(parent);
e56e0b78 1006 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1007 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1008 struct nfs4_opendata *p;
1009
8535b2be 1010 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1011 if (p == NULL)
1012 goto err;
14c43f76
DQ		 1013
1014 p->f_label = nfs4_label_alloc(server, gfp_mask);
1015 if (IS_ERR(p->f_label))
1016 goto err_free_p;
1017
63f5f796
TM		 1018 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1019 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1020 if (IS_ERR(p->o_arg.seqid))
14c43f76 1021 goto err_free_label;
82a2c1b7
AV		 1022 nfs_sb_active(dentry->d_sb);
1023 p->dentry = dget(dentry);
e56e0b78
TM		 1024 p->dir = parent;
1025 p->owner = sp;
1026 atomic_inc(&sp->so_count);
dc0b027d
TM		 1027 p->o_arg.open_flags = flags;
1028 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1029 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1030 fmode, flags);
ae2bb032
WAA		 1031 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1032 * will return permission denied for all bits until close */
1033 if (!(flags & O_EXCL)) {
1034 /* ask server to check for all possible rights as results
1035 * are cached */
1036 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1037 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1038 }
7539bbab 1039 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1040 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1041 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1042 p->o_arg.name = &dentry->d_name;
e56e0b78 1043 p->o_arg.server = server;
aa9c2669 1044 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1045 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1046 p->o_arg.label = label;
49f9a0fa
TM		 1047 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1048 switch (p->o_arg.claim) {
4a1c0893
TM		 1049 case NFS4_OPEN_CLAIM_NULL:
1050 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1051 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1052 p->o_arg.fh = NFS_FH(dir);
1053 break;
1054 case NFS4_OPEN_CLAIM_PREVIOUS:
1055 case NFS4_OPEN_CLAIM_FH:
1056 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1057 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1058 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1059 }
536e43d1 1060 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1061 __u32 verf[2];
d77d76ff 1062
e56e0b78
TM		 1063 p->o_arg.u.attrs = &p->attrs;
1064 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1065
1066 verf[0] = jiffies;
1067 verf[1] = current->pid;
1068 memcpy(p->o_arg.u.verifier.data, verf,
1069 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1070 }
cdd4e68b
TM		 1071 p->c_arg.fh = &p->o_res.fh;
1072 p->c_arg.stateid = &p->o_res.stateid;
1073 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1074 nfs4_init_opendata_res(p);
c6d00e63 1075 kref_init(&p->kref);
e56e0b78 1076 return p;
14c43f76
DQ		 1077
1078err_free_label:
1079 nfs4_label_free(p->f_label);
1080err_free_p:
e56e0b78
TM		 1081 kfree(p);
1082err:
1083 dput(parent);
1084 return NULL;
1085}
1086
c6d00e63 1087static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1088{
c6d00e63
TM		 1089 struct nfs4_opendata *p = container_of(kref,
1090 struct nfs4_opendata, kref);
82a2c1b7 1091 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1092
1093 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1094 if (p->state != NULL)
1095 nfs4_put_open_state(p->state);
c6d00e63 1096 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1097
1098 nfs4_label_free(p->f_label);
1099
c6d00e63 1100 dput(p->dir);
82a2c1b7
AV		 1101 dput(p->dentry);
1102 nfs_sb_deactive(sb);
6926afd1 1103 nfs_fattr_free_names(&p->f_attr);
e911b815 1104 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1105 kfree(p);
1106}
1107
1108static void nfs4_opendata_put(struct nfs4_opendata *p)
1109{
1110 if (p != NULL)
1111 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1112}
1113
06f814a3
TM		 1114static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1115{
06f814a3
TM		 1116 int ret;
1117
06f814a3 1118 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1119 return ret;
1120}
1121
dc0b027d 1122static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1123{
1124 int ret = 0;
dc0b027d 1125
536e43d1 1126 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1127 goto out;
1128 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1129 case FMODE_READ:
88069f77
TM		 1130 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1131 && state->n_rdonly != 0;
6ee41268
TM		 1132 break;
1133 case FMODE_WRITE:
88069f77
TM		 1134 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1135 && state->n_wronly != 0;
6ee41268
TM		 1136 break;
1137 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1138 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1139 && state->n_rdwr != 0;
6ee41268 1140 }
dc0b027d 1141out:
6ee41268
TM		 1142 return ret;
1143}
1144
dc0b027d 1145static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1146{
652f89f6
TM		 1147 if (delegation == NULL)
1148 return 0;
dc0b027d 1149 if ((delegation->type & fmode) != fmode)
aac00a8d 1150 return 0;
d25be546
TM		 1151 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1152 return 0;
b7391f44 1153 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1154 return 1;
1155}
1156
dc0b027d 1157static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1158{
dc0b027d 1159 switch (fmode) {
e7616923
TM		 1160 case FMODE_WRITE:
1161 state->n_wronly++;
1162 break;
1163 case FMODE_READ:
1164 state->n_rdonly++;
1165 break;
1166 case FMODE_READ|FMODE_WRITE:
1167 state->n_rdwr++;
1168 }
dc0b027d 1169 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1170}
1171
4f14c194
TM		 1172static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1173{
1174 struct nfs_client *clp = state->owner->so_server->nfs_client;
1175 bool need_recover = false;
1176
1177 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1178 need_recover = true;
1179 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1180 need_recover = true;
1181 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1182 need_recover = true;
1183 if (need_recover)
1184 nfs4_state_mark_reclaim_nograce(clp, state);
1185}
1186
e999e80e
TM		 1187static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1188 nfs4_stateid *stateid)
1189{
1190 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1191 return true;
4f14c194
TM		 1192 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1193 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1194 return true;
4f14c194 1195 }
e999e80e
TM		 1196 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1197 return true;
1198 return false;
1199}
1200
f95549cf
TM		 1201static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1202{
3c38cbe2
TM		 1203 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1204 return;
f95549cf
TM		 1205 if (state->n_wronly)
1206 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1207 if (state->n_rdonly)
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 if (state->n_rdwr)
1210 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1211 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1212}
1213
226056c5
TM		 1214static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1215 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1216{
226056c5
TM		 1217 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1218 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1219 case FMODE_WRITE:
1220 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1221 break;
1222 case FMODE_READ:
1223 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1224 break;
1225 case 0:
1226 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1227 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1228 clear_bit(NFS_OPEN_STATE, &state->flags);
1229 }
1230 if (stateid == NULL)
1231 return;
f95549cf
TM		 1232 /* Handle races with OPEN */
1233 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1234 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1235 nfs_resync_open_stateid_locked(state);
226056c5 1236 return;
f95549cf 1237 }
003707c7 1238 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1239 nfs4_stateid_copy(&state->stateid, stateid);
1240 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1241}
1242
1243static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1244{
1245 write_seqlock(&state->seqlock);
1246 nfs_clear_open_stateid_locked(state, stateid, fmode);
1247 write_sequnlock(&state->seqlock);
4f14c194
TM		 1248 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1249 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1250}
1251
dc0b027d 1252static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1253{
dc0b027d 1254 switch (fmode) {
003707c7
TM		 1255 case FMODE_READ:
1256 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1257 break;
1258 case FMODE_WRITE:
1259 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1260 break;
1261 case FMODE_READ|FMODE_WRITE:
1262 set_bit(NFS_O_RDWR_STATE, &state->flags);
1263 }
e999e80e
TM		 1264 if (!nfs_need_update_open_stateid(state, stateid))
1265 return;
1266 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1267 nfs4_stateid_copy(&state->stateid, stateid);
1268 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1269}
1270
dc0b027d 1271static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1272{
8bda4e4c
TM		 1273 /*
1274 * Protect the call to nfs4_state_set_mode_locked and
1275 * serialise the stateid update
1276 */
1277 write_seqlock(&state->seqlock);
003707c7 1278 if (deleg_stateid != NULL) {
f597c537 1279 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1280 set_bit(NFS_DELEGATED_STATE, &state->flags);
1281 }
1282 if (open_stateid != NULL)
dc0b027d 1283 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1284 write_sequnlock(&state->seqlock);
1285 spin_lock(&state->owner->so_lock);
dc0b027d 1286 update_open_stateflags(state, fmode);
ec073428 1287 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1288}
1289
dc0b027d 1290static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1291{
1292 struct nfs_inode *nfsi = NFS_I(state->inode);
1293 struct nfs_delegation *deleg_cur;
1294 int ret = 0;
1295
dc0b027d 1296 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1297
1298 rcu_read_lock();
1299 deleg_cur = rcu_dereference(nfsi->delegation);
1300 if (deleg_cur == NULL)
1301 goto no_delegation;
1302
1303 spin_lock(&deleg_cur->lock);
17f26b12 1304 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1305 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1306 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1307 goto no_delegation_unlock;
1308
1309 if (delegation == NULL)
1310 delegation = &deleg_cur->stateid;
f597c537 1311 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1312 goto no_delegation_unlock;
1313
b7391f44 1314 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1315 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1316 ret = 1;
1317no_delegation_unlock:
1318 spin_unlock(&deleg_cur->lock);
1319no_delegation:
1320 rcu_read_unlock();
1321
1322 if (!ret && open_stateid != NULL) {
dc0b027d 1323 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1324 ret = 1;
1325 }
4f14c194
TM		 1326 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1327 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1328
1329 return ret;
1330}
1331
39071e6f
TM		 1332static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1333 const nfs4_stateid *stateid)
1334{
1335 struct nfs4_state *state = lsp->ls_state;
1336 bool ret = false;
1337
1338 spin_lock(&state->state_lock);
1339 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1340 goto out_noupdate;
1341 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1342 goto out_noupdate;
1343 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1344 ret = true;
1345out_noupdate:
1346 spin_unlock(&state->state_lock);
1347 return ret;
1348}
34310430 1349
dc0b027d 1350static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1351{
1352 struct nfs_delegation *delegation;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1356 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1357 rcu_read_unlock();
1358 return;
1359 }
1360 rcu_read_unlock();
57ec14c5 1361 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1362}
1363
6ee41268 1364static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1365{
1366 struct nfs4_state *state = opendata->state;
1367 struct nfs_inode *nfsi = NFS_I(state->inode);
1368 struct nfs_delegation *delegation;
f448badd 1369 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1370 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1371 nfs4_stateid stateid;
1372 int ret = -EAGAIN;
1373
aac00a8d 1374 for (;;) {
61beef75 1375 spin_lock(&state->owner->so_lock);
dc0b027d 1376 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1377 update_open_stateflags(state, fmode);
6ee41268 1378 spin_unlock(&state->owner->so_lock);
61beef75 1379 goto out_return_state;
6ee41268 1380 }
61beef75 1381 spin_unlock(&state->owner->so_lock);
34310430
TM		 1382 rcu_read_lock();
1383 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1384 if (!can_open_delegated(delegation, fmode)) {
34310430 1385 rcu_read_unlock();
aac00a8d 1386 break;
34310430 1387 }
aac00a8d 1388 /* Save the delegation */
f597c537 1389 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1390 rcu_read_unlock();
fa332941 1391 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1392 if (!opendata->is_recover) {
1393 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1394 if (ret != 0)
1395 goto out;
1396 }
aac00a8d 1397 ret = -EAGAIN;
34310430
TM		 1398
1399 /* Try to update the stateid using the delegation */
dc0b027d 1400 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1401 goto out_return_state;
aac00a8d 1402 }
aac00a8d
TM		 1403out:
1404 return ERR_PTR(ret);
1405out_return_state:
1406 atomic_inc(&state->count);
1407 return state;
1408}
1409
e23008ec
AA		 1410static void
1411nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1412{
1413 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1414 struct nfs_delegation *delegation;
1415 int delegation_flags = 0;
1416
1417 rcu_read_lock();
1418 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1419 if (delegation)
1420 delegation_flags = delegation->flags;
1421 rcu_read_unlock();
1422 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1423 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1424 "returning a delegation for "
1425 "OPEN(CLAIM_DELEGATE_CUR)\n",
1426 clp->cl_hostname);
1427 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1428 nfs_inode_set_delegation(state->inode,
1429 data->owner->so_cred,
1430 &data->o_res);
1431 else
1432 nfs_inode_reclaim_delegation(state->inode,
1433 data->owner->so_cred,
1434 &data->o_res);
1435}
1436
1437/*
1438 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1439 * and update the nfs4_state.
1440 */
1441static struct nfs4_state *
1442_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1443{
1444 struct inode *inode = data->state->inode;
1445 struct nfs4_state *state = data->state;
1446 int ret;
1447
d2bfda2e
WAA		 1448 if (!data->rpc_done) {
1449 if (data->rpc_status) {
1450 ret = data->rpc_status;
1451 goto err;
1452 }
1453 /* cached opens have already been processed */
1454 goto update;
e23008ec
AA		 1455 }
1456
e23008ec
AA		 1457 ret = nfs_refresh_inode(inode, &data->f_attr);
1458 if (ret)
1459 goto err;
1460
1461 if (data->o_res.delegation_type != 0)
1462 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1463update:
e23008ec
AA		 1464 update_open_stateid(state, &data->o_res.stateid, NULL,
1465 data->o_arg.fmode);
d49f042a 1466 atomic_inc(&state->count);
e23008ec
AA		 1467
1468 return state;
1469err:
1470 return ERR_PTR(ret);
1471
1472}
1473
1474static struct nfs4_state *
1475_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1476{
1477 struct inode *inode;
1478 struct nfs4_state *state = NULL;
1b370bc2 1479 int ret;
24ac23ab 1480
aac00a8d 1481 if (!data->rpc_done) {
6ee41268 1482 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1483 goto out;
1484 }
1485
1b370bc2 1486 ret = -EAGAIN;
24ac23ab 1487 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1488 goto err;
1775fd3e 1489 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1490 ret = PTR_ERR(inode);
03f28e3a 1491 if (IS_ERR(inode))
1b370bc2
TM		 1492 goto err;
1493 ret = -ENOMEM;
24ac23ab
TM		 1494 state = nfs4_get_open_state(inode, data->owner);
1495 if (state == NULL)
1b370bc2 1496 goto err_put_inode;
e23008ec
AA		 1497 if (data->o_res.delegation_type != 0)
1498 nfs4_opendata_check_deleg(data, state);
34310430 1499 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1500 data->o_arg.fmode);
24ac23ab 1501 iput(inode);
aac00a8d 1502out:
7aa262b5 1503 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1504 return state;
1b370bc2
TM		 1505err_put_inode:
1506 iput(inode);
1507err:
1508 return ERR_PTR(ret);
24ac23ab
TM		 1509}
1510
e23008ec
AA		 1511static struct nfs4_state *
1512nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1513{
1514 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1515 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1516 return _nfs4_opendata_to_nfs4_state(data);
1517}
1518
864472e9
TM		 1519static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1520{
1521 struct nfs_inode *nfsi = NFS_I(state->inode);
1522 struct nfs_open_context *ctx;
1523
1524 spin_lock(&state->inode->i_lock);
1525 list_for_each_entry(ctx, &nfsi->open_files, list) {
1526 if (ctx->state != state)
1527 continue;
1528 get_nfs_open_context(ctx);
1529 spin_unlock(&state->inode->i_lock);
1530 return ctx;
1531 }
1532 spin_unlock(&state->inode->i_lock);
1533 return ERR_PTR(-ENOENT);
1534}
1535
4a1c0893
TM		 1536static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1537 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1538{
1539 struct nfs4_opendata *opendata;
1540
4a1c0893 1541 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1542 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1543 if (opendata == NULL)
1544 return ERR_PTR(-ENOMEM);
1545 opendata->state = state;
1546 atomic_inc(&state->count);
1547 return opendata;
1548}
1549
dc0b027d 1550static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1551{
2ced46c2 1552 struct nfs4_state *newstate;
864472e9
TM		 1553 int ret;
1554
39f897fd
N		 1555 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1556 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1557 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1558 /* This mode can't have been delegated, so we must have
1559 * a valid open_stateid to cover it - not need to reclaim.
1560 */
1561 return 0;
dc0b027d
TM		 1562 opendata->o_arg.open_flags = 0;
1563 opendata->o_arg.fmode = fmode;
be36e185
TM		 1564 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1565 NFS_SB(opendata->dentry->d_sb),
1566 fmode, 0);
2ced46c2
TM		 1567 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1568 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1569 nfs4_init_opendata_res(opendata);
b257957e 1570 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1571 if (ret != 0)
1572 return ret;
2ced46c2 1573 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1574 if (IS_ERR(newstate))
1575 return PTR_ERR(newstate);
643168c2 1576 nfs4_close_state(newstate, fmode);
2ced46c2 1577 *res = newstate;
864472e9
TM		 1578 return 0;
1579}
1580
1581static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1582{
864472e9 1583 struct nfs4_state *newstate;
864472e9
TM		 1584 int ret;
1585
4f14c194
TM		 1586 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1587 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1588 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1589 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1590 /* memory barrier prior to reading state->n_* */
2ced46c2 1591 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1592 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1593 smp_rmb();
1594 if (state->n_rdwr != 0) {
2ced46c2 1595 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1596 if (ret != 0)
1597 return ret;
2ced46c2
TM		 1598 if (newstate != state)
1599 return -ESTALE;
864472e9
TM		 1600 }
1601 if (state->n_wronly != 0) {
2ced46c2 1602 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1603 if (ret != 0)
1604 return ret;
2ced46c2
TM		 1605 if (newstate != state)
1606 return -ESTALE;
864472e9
TM		 1607 }
1608 if (state->n_rdonly != 0) {
2ced46c2 1609 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1610 if (ret != 0)
1611 return ret;
2ced46c2
TM		 1612 if (newstate != state)
1613 return -ESTALE;
864472e9 1614 }
1ac7e2fd
TM		 1615 /*
1616 * We may have performed cached opens for all three recoveries.
1617 * Check if we need to update the current stateid.
1618 */
1619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1620 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1621 write_seqlock(&state->seqlock);
1ac7e2fd 1622 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1623 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1624 write_sequnlock(&state->seqlock);
1ac7e2fd 1625 }
864472e9
TM		 1626 return 0;
1627}
1628
1da177e4
LT		 1629/*
1630 * OPEN_RECLAIM:
1631 * reclaim state on the server after a reboot.
1da177e4 1632 */
539cd03a 1633static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1634{
1ac7e2fd 1635 struct nfs_delegation *delegation;
864472e9 1636 struct nfs4_opendata *opendata;
dc0b027d 1637 fmode_t delegation_type = 0;
1da177e4
LT		 1638 int status;
1639
4a1c0893
TM		 1640 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1641 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1642 if (IS_ERR(opendata))
1643 return PTR_ERR(opendata);
1ac7e2fd
TM		 1644 rcu_read_lock();
1645 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1646 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1647 delegation_type = delegation->type;
1ac7e2fd 1648 rcu_read_unlock();
864472e9
TM		 1649 opendata->o_arg.u.delegation_type = delegation_type;
1650 status = nfs4_open_recover(opendata, state);
c6d00e63 1651 nfs4_opendata_put(opendata);
1da177e4
LT		 1652 return status;
1653}
1654
539cd03a 1655static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1656{
1657 struct nfs_server *server = NFS_SERVER(state->inode);
1658 struct nfs4_exception exception = { };
1659 int err;
1660 do {
539cd03a 1661 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1662 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1663 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1664 continue;
168667c4 1665 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1666 break;
1667 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1668 } while (exception.retry);
1669 return err;
1670}
1671
864472e9
TM		 1672static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1673{
1674 struct nfs_open_context *ctx;
1675 int ret;
1676
1677 ctx = nfs4_state_find_open_context(state);
1678 if (IS_ERR(ctx))
91876b13 1679 return -EAGAIN;
539cd03a 1680 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1681 put_nfs_open_context(ctx);
1682 return ret;
1683}
1684
db4f2e63 1685static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1686{
be76b5b6
TM		 1687 switch (err) {
1688 default:
1689 printk(KERN_ERR "NFS: %s: unhandled error "
1690 "%d.\n", __func__, err);
1691 case 0:
1692 case -ENOENT:
8eee52af 1693 case -EAGAIN:
be76b5b6
TM		 1694 case -ESTALE:
1695 break;
1696 case -NFS4ERR_BADSESSION:
1697 case -NFS4ERR_BADSLOT:
1698 case -NFS4ERR_BAD_HIGH_SLOT:
1699 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1700 case -NFS4ERR_DEADSESSION:
1701 set_bit(NFS_DELEGATED_STATE, &state->flags);
1702 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1703 return -EAGAIN;
1704 case -NFS4ERR_STALE_CLIENTID:
1705 case -NFS4ERR_STALE_STATEID:
1706 set_bit(NFS_DELEGATED_STATE, &state->flags);
1707 case -NFS4ERR_EXPIRED:
1708 /* Don't recall a delegation if it was lost */
1709 nfs4_schedule_lease_recovery(server->nfs_client);
1710 return -EAGAIN;
352297b9
CL		 1711 case -NFS4ERR_MOVED:
1712 nfs4_schedule_migration_recovery(server);
1713 return -EAGAIN;
8ef2f8d4
CL		 1714 case -NFS4ERR_LEASE_MOVED:
1715 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1716 return -EAGAIN;
be76b5b6
TM		 1717 case -NFS4ERR_DELEG_REVOKED:
1718 case -NFS4ERR_ADMIN_REVOKED:
1719 case -NFS4ERR_BAD_STATEID:
db4f2e63 1720 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1721 nfs_inode_find_state_and_recover(state->inode,
1722 stateid);
1723 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1724 return -EAGAIN;
be76b5b6
TM		 1725 case -NFS4ERR_DELAY:
1726 case -NFS4ERR_GRACE:
1727 set_bit(NFS_DELEGATED_STATE, &state->flags);
1728 ssleep(1);
1729 return -EAGAIN;
db4f2e63
TM		 1730 case -ENOMEM:
1731 case -NFS4ERR_DENIED:
1732 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1733 return 0;
be76b5b6 1734 }
1da177e4
LT		 1735 return err;
1736}
1737
db4f2e63
TM		 1738int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1739{
1740 struct nfs_server *server = NFS_SERVER(state->inode);
1741 struct nfs4_opendata *opendata;
1742 int err;
1743
1744 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1745 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1746 if (IS_ERR(opendata))
1747 return PTR_ERR(opendata);
1748 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1749 err = nfs4_open_recover(opendata, state);
1750 nfs4_opendata_put(opendata);
1751 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1752}
1753
be05c860
CL		 1754static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1755{
1756 struct nfs4_opendata *data = calldata;
1757
cb04ad2a
PT		 1758 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1759 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1760}
1761
cdd4e68b
TM		 1762static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1763{
1764 struct nfs4_opendata *data = calldata;
1765
17ead6c8 1766 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1767
cdd4e68b 1768 data->rpc_status = task->tk_status;
26e976a8 1769 if (data->rpc_status == 0) {
f597c537 1770 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1771 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1772 renew_lease(data->o_res.server, data->timestamp);
3e309914 1773 data->rpc_done = 1;
26e976a8 1774 }
cdd4e68b
TM		 1775}
1776
1777static void nfs4_open_confirm_release(void *calldata)
1778{
1779 struct nfs4_opendata *data = calldata;
1780 struct nfs4_state *state = NULL;
1781
1782 /* If this request hasn't been cancelled, do nothing */
1783 if (data->cancelled == 0)
1784 goto out_free;
1785 /* In case of error, no cleanup! */
3e309914 1786 if (!data->rpc_done)
cdd4e68b 1787 goto out_free;
cdd4e68b 1788 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1789 if (!IS_ERR(state))
643168c2 1790 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1791out_free:
c6d00e63 1792 nfs4_opendata_put(data);
cdd4e68b
TM		 1793}
1794
1795static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1796 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1797 .rpc_call_done = nfs4_open_confirm_done,
1798 .rpc_release = nfs4_open_confirm_release,
1799};
1800
1801/*
1802 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1803 */
1804static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1805{
2b0143b5 1806 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1807 struct rpc_task *task;
5138fde0
TM		 1808 struct rpc_message msg = {
1809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1810 .rpc_argp = &data->c_arg,
1811 .rpc_resp = &data->c_res,
1812 .rpc_cred = data->owner->so_cred,
1813 };
c970aa85
TM		 1814 struct rpc_task_setup task_setup_data = {
1815 .rpc_client = server->client,
5138fde0 1816 .rpc_message = &msg,
c970aa85
TM		 1817 .callback_ops = &nfs4_open_confirm_ops,
1818 .callback_data = data,
101070ca 1819 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1820 .flags = RPC_TASK_ASYNC,
1821 };
1da177e4
LT		 1822 int status;
1823
17ead6c8 1824 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1825 kref_get(&data->kref);
3e309914
TM		 1826 data->rpc_done = 0;
1827 data->rpc_status = 0;
5138fde0 1828 data->timestamp = jiffies;
c970aa85 1829 task = rpc_run_task(&task_setup_data);
7a1218a2 1830 if (IS_ERR(task))
cdd4e68b 1831 return PTR_ERR(task);
cdd4e68b
TM		 1832 status = nfs4_wait_for_completion_rpc_task(task);
1833 if (status != 0) {
1834 data->cancelled = 1;
1835 smp_wmb();
1836 } else
1837 status = data->rpc_status;
e6b3c4db 1838 rpc_put_task(task);
1da177e4
LT		 1839 return status;
1840}
1841
24ac23ab 1842static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1843{
24ac23ab
TM		 1844 struct nfs4_opendata *data = calldata;
1845 struct nfs4_state_owner *sp = data->owner;
549b19cc 1846 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1847
24ac23ab 1848 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1849 goto out_wait;
aac00a8d
TM		 1850 /*
1851 * Check if we still need to send an OPEN call, or if we can use
1852 * a delegation instead.
1853 */
1854 if (data->state != NULL) {
1855 struct nfs_delegation *delegation;
1856
dc0b027d 1857 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1858 goto out_no_action;
aac00a8d
TM		 1859 rcu_read_lock();
1860 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1861 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1862 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1863 can_open_delegated(delegation, data->o_arg.fmode))
1864 goto unlock_no_action;
aac00a8d
TM		 1865 rcu_read_unlock();
1866 }
95b72eb0 1867 /* Update client id. */
549b19cc 1868 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1869 switch (data->o_arg.claim) {
1870 case NFS4_OPEN_CLAIM_PREVIOUS:
1871 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1872 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1873 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1874 case NFS4_OPEN_CLAIM_FH:
1875 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1876 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1877 }
26e976a8 1878 data->timestamp = jiffies;
035168ab 1879 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1880 &data->o_arg.seq_args,
2240a9e2
TM		 1881 &data->o_res.seq_res,
1882 task) != 0)
1883 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1884
1885 /* Set the create mode (note dependency on the session type) */
1886 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1887 if (data->o_arg.open_flags & O_EXCL) {
1888 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1889 if (nfs4_has_persistent_session(clp))
1890 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1891 else if (clp->cl_mvops->minor_version > 0)
1892 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1893 }
6ee41268 1894 return;
652f89f6
TM		 1895unlock_no_action:
1896 rcu_read_unlock();
6ee41268
TM		 1897out_no_action:
1898 task->tk_action = NULL;
c8da19b9 1899out_wait:
b75ad4cd 1900 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1901}
1902
24ac23ab
TM		 1903static void nfs4_open_done(struct rpc_task *task, void *calldata)
1904{
1905 struct nfs4_opendata *data = calldata;
1da177e4 1906
24ac23ab 1907 data->rpc_status = task->tk_status;
d898528c 1908
14516c3a
TM		 1909 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1910 return;
d898528c 1911
24ac23ab 1912 if (task->tk_status == 0) {
807d66d8
TM		 1913 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1914 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1915 case S_IFREG:
1916 break;
1917 case S_IFLNK:
24ac23ab 1918 data->rpc_status = -ELOOP;
6f926b5b
TM		 1919 break;
1920 case S_IFDIR:
24ac23ab 1921 data->rpc_status = -EISDIR;
6f926b5b
TM		 1922 break;
1923 default:
24ac23ab 1924 data->rpc_status = -ENOTDIR;
807d66d8 1925 }
6f926b5b 1926 }
26e976a8 1927 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1928 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1929 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1930 }
3e309914 1931 data->rpc_done = 1;
24ac23ab 1932}
6f926b5b 1933
24ac23ab
TM		 1934static void nfs4_open_release(void *calldata)
1935{
1936 struct nfs4_opendata *data = calldata;
1937 struct nfs4_state *state = NULL;
1938
1939 /* If this request hasn't been cancelled, do nothing */
1940 if (data->cancelled == 0)
1941 goto out_free;
1942 /* In case of error, no cleanup! */
3e309914 1943 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1944 goto out_free;
1945 /* In case we need an open_confirm, no cleanup! */
1946 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1947 goto out_free;
24ac23ab 1948 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1949 if (!IS_ERR(state))
643168c2 1950 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1951out_free:
c6d00e63 1952 nfs4_opendata_put(data);
24ac23ab
TM		 1953}
1954
1955static const struct rpc_call_ops nfs4_open_ops = {
1956 .rpc_call_prepare = nfs4_open_prepare,
1957 .rpc_call_done = nfs4_open_done,
1958 .rpc_release = nfs4_open_release,
1959};
1960
b257957e 1961static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1962{
2b0143b5 1963 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1964 struct nfs_server *server = NFS_SERVER(dir);
1965 struct nfs_openargs *o_arg = &data->o_arg;
1966 struct nfs_openres *o_res = &data->o_res;
1967 struct rpc_task *task;
5138fde0
TM		 1968 struct rpc_message msg = {
1969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1970 .rpc_argp = o_arg,
1971 .rpc_resp = o_res,
1972 .rpc_cred = data->owner->so_cred,
1973 };
c970aa85
TM		 1974 struct rpc_task_setup task_setup_data = {
1975 .rpc_client = server->client,
5138fde0 1976 .rpc_message = &msg,
c970aa85
TM		 1977 .callback_ops = &nfs4_open_ops,
1978 .callback_data = data,
101070ca 1979 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1980 .flags = RPC_TASK_ASYNC,
1981 };
24ac23ab
TM		 1982 int status;
1983
a9c92d6b 1984 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1985 kref_get(&data->kref);
3e309914
TM		 1986 data->rpc_done = 0;
1987 data->rpc_status = 0;
2ced46c2 1988 data->cancelled = 0;
bdeca1b7
TM		 1989 data->is_recover = 0;
1990 if (isrecover) {
8fe72bac 1991 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1992 data->is_recover = 1;
1993 }
c970aa85 1994 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1995 if (IS_ERR(task))
1996 return PTR_ERR(task);
1997 status = nfs4_wait_for_completion_rpc_task(task);
1998 if (status != 0) {
1999 data->cancelled = 1;
2000 smp_wmb();
2001 } else
2002 status = data->rpc_status;
2003 rpc_put_task(task);
2004
2005 return status;
2006}
2007
2008static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2009{
2b0143b5 2010 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2011 struct nfs_openres *o_res = &data->o_res;
2012 int status;
2013
2014 status = nfs4_run_open_task(data, 1);
2015 if (status != 0 || !data->rpc_done)
2016 return status;
2017
6926afd1
TM		 2018 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2019
b257957e
AB		 2020 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2021 status = _nfs4_proc_open_confirm(data);
2022 if (status != 0)
2023 return status;
2024 }
2025
2026 return status;
2027}
2028
f3792d63
TM		 2029/*
2030 * Additional permission checks in order to distinguish between an
2031 * open for read, and an open for execute. This works around the
2032 * fact that NFSv4 OPEN treats read and execute permissions as being
2033 * the same.
2034 * Note that in the non-execute case, we want to turn off permission
2035 * checking if we just created a new file (POSIX open() semantics).
2036 */
6168f62c
WAA		 2037static int nfs4_opendata_access(struct rpc_cred *cred,
2038 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2039 struct nfs4_state *state, fmode_t fmode,
2040 int openflags)
6168f62c
WAA		 2041{
2042 struct nfs_access_entry cache;
2043 u32 mask;
2044
2045 /* access call failed or for some reason the server doesn't
2046 * support any access modes -- defer access call until later */
2047 if (opendata->o_res.access_supported == 0)
2048 return 0;
2049
2050 mask = 0;
f3792d63
TM		 2051 /*
2052 * Use openflags to check for exec, because fmode won't
2053 * always have FMODE_EXEC set when file open for exec.
2054 */
f8d9a897
WAA		 2055 if (openflags & __FMODE_EXEC) {
2056 /* ONLY check for exec rights */
2057 mask = MAY_EXEC;
f3792d63 2058 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2059 mask = MAY_READ;
6168f62c
WAA		 2060
2061 cache.cred = cred;
2062 cache.jiffies = jiffies;
2063 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2064 nfs_access_add_cache(state->inode, &cache);
2065
bbd3a8ee 2066 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2067 return 0;
2068
2069 /* even though OPEN succeeded, access is denied. Close the file */
2070 nfs4_close_state(state, fmode);
998f40b5 2071 return -EACCES;
6168f62c
WAA		 2072}
2073
b257957e
AB		 2074/*
2075 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2076 */
2077static int _nfs4_proc_open(struct nfs4_opendata *data)
2078{
2b0143b5 2079 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2080 struct nfs_server *server = NFS_SERVER(dir);
2081 struct nfs_openargs *o_arg = &data->o_arg;
2082 struct nfs_openres *o_res = &data->o_res;
2083 int status;
2084
2085 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2086 if (!data->rpc_done)
2087 return status;
2088 if (status != 0) {
2089 if (status == -NFS4ERR_BADNAME &&
2090 !(o_arg->open_flags & O_CREAT))
2091 return -ENOENT;
24ac23ab 2092 return status;
08ef7bd3 2093 }
24ac23ab 2094
6926afd1
TM		 2095 nfs_fattr_map_and_free_names(server, &data->f_attr);
2096
5bc2afc2 2097 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2098 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2099 if (o_arg->open_flags & O_EXCL)
2100 data->file_created = 1;
2101 else if (o_res->cinfo.before != o_res->cinfo.after)
2102 data->file_created = 1;
2103 }
0df5dd4a
TM		 2104 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2105 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2106 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2107 status = _nfs4_proc_open_confirm(data);
1da177e4 2108 if (status != 0)
24ac23ab 2109 return status;
1da177e4
LT		 2110 }
2111 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2112 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2113 return 0;
1da177e4
LT		 2114}
2115
d83217c1
AA		 2116static int nfs4_recover_expired_lease(struct nfs_server *server)
2117{
2118 return nfs4_client_recover_expired_lease(server->nfs_client);
2119}
2120
1da177e4
LT		 2121/*
2122 * OPEN_EXPIRED:
2123 * reclaim state on the server after a network partition.
2124 * Assumes caller holds the appropriate lock
2125 */
539cd03a 2126static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2127{
e56e0b78 2128 struct nfs4_opendata *opendata;
864472e9 2129 int ret;
1da177e4 2130
4a1c0893 2131 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2132 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2133 if (IS_ERR(opendata))
2134 return PTR_ERR(opendata);
864472e9 2135 ret = nfs4_open_recover(opendata, state);
35d05778 2136 if (ret == -ESTALE)
3d4ff43d 2137 d_drop(ctx->dentry);
c6d00e63 2138 nfs4_opendata_put(opendata);
864472e9 2139 return ret;
1da177e4
LT		 2140}
2141
a9ed2e25 2142static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2143{
539cd03a 2144 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2145 struct nfs4_exception exception = { };
2146 int err;
2147
2148 do {
539cd03a 2149 err = _nfs4_open_expired(ctx, state);
42113a75 2150 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2151 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2152 continue;
a9ed2e25
TM		 2153 switch (err) {
2154 default:
2155 goto out;
2156 case -NFS4ERR_GRACE:
2157 case -NFS4ERR_DELAY:
2158 nfs4_handle_exception(server, err, &exception);
2159 err = 0;
2160 }
202b50dc 2161 } while (exception.retry);
a9ed2e25 2162out:
202b50dc
TM		 2163 return err;
2164}
2165
1da177e4
LT		 2166static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2167{
1da177e4 2168 struct nfs_open_context *ctx;
864472e9 2169 int ret;
1da177e4 2170
864472e9
TM		 2171 ctx = nfs4_state_find_open_context(state);
2172 if (IS_ERR(ctx))
91876b13 2173 return -EAGAIN;
539cd03a 2174 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2175 put_nfs_open_context(ctx);
2176 return ret;
1da177e4
LT		 2177}
2178
4dfd4f7a
TM		 2179static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2180{
2181 nfs_remove_bad_delegation(state->inode);
2182 write_seqlock(&state->seqlock);
2183 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2184 write_sequnlock(&state->seqlock);
2185 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2186}
2187
2188static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2189{
2190 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2191 nfs_finish_clear_delegation_stateid(state);
2192}
2193
2194static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2195{
2196 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2197 nfs40_clear_delegation_stateid(state);
2198 return nfs4_open_expired(sp, state);
2199}
2200
f062eb6c 2201#if defined(CONFIG_NFS_V4_1)
0c116cad 2202static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2203{
f062eb6c 2204 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2205 nfs4_stateid stateid;
ab7cb0df 2206 struct nfs_delegation *delegation;
0c116cad
TM		 2207 struct rpc_cred *cred;
2208 int status;
3e60ffdd 2209
ab7cb0df
TM		 2210 /* Get the delegation credential for use by test/free_stateid */
2211 rcu_read_lock();
2212 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2213 if (delegation == NULL) {
ab7cb0df 2214 rcu_read_unlock();
0c116cad
TM		 2215 return;
2216 }
2217
2218 nfs4_stateid_copy(&stateid, &delegation->stateid);
2219 cred = get_rpccred(delegation->cred);
2220 rcu_read_unlock();
2221 status = nfs41_test_stateid(server, &stateid, cred);
2222 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2223
3e60ffdd
CL		 2224 if (status != NFS_OK) {
2225 /* Free the stateid unless the server explicitly
2226 * informs us the stateid is unrecognized. */
2227 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2228 nfs41_free_stateid(server, &stateid, cred);
2229 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2230 }
ab7cb0df 2231
0c116cad 2232 put_rpccred(cred);
3e60ffdd
CL		 2233}
2234
2235/**
2236 * nfs41_check_open_stateid - possibly free an open stateid
2237 *
2238 * @state: NFSv4 state for an inode
2239 *
2240 * Returns NFS_OK if recovery for this stateid is now finished.
2241 * Otherwise a negative NFS4ERR value is returned.
2242 */
2243static int nfs41_check_open_stateid(struct nfs4_state *state)
2244{
2245 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2246 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2247 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2248 int status;
2249
2250 /* If a state reset has been done, test_stateid is unneeded */
2251 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2252 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2253 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2254 return -NFS4ERR_BAD_STATEID;
2255
ab7cb0df 2256 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2257 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2258 if (status != NFS_OK) {
2259 /* Free the stateid unless the server explicitly
2260 * informs us the stateid is unrecognized. */
2261 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2262 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2263
2264 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2265 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2266 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2267 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2268 }
2269 return status;
2270}
2271
2272static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2273{
eb64cf96 2274 int status;
b01dd1d8 2275
0c116cad 2276 nfs41_check_delegation_stateid(state);
3e60ffdd 2277 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2278 if (status != NFS_OK)
2279 status = nfs4_open_expired(sp, state);
2280 return status;
f062eb6c
BS		 2281}
2282#endif
2283
aa53ed54
JL		 2284/*
2285 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2286 * fields corresponding to attributes that were used to store the verifier.
2287 * Make sure we clobber those fields in the later setattr call
2288 */
2289static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2290{
2291 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2292 !(sattr->ia_valid & ATTR_ATIME_SET))
2293 sattr->ia_valid |= ATTR_ATIME;
2294
2295 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2296 !(sattr->ia_valid & ATTR_MTIME_SET))
2297 sattr->ia_valid |= ATTR_MTIME;
2298}
2299
c21443c2
TM		 2300static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2301 fmode_t fmode,
2302 int flags,
3efb9722 2303 struct nfs_open_context *ctx)
c21443c2
TM		 2304{
2305 struct nfs4_state_owner *sp = opendata->owner;
2306 struct nfs_server *server = sp->so_server;
275bb307 2307 struct dentry *dentry;
c21443c2
TM		 2308 struct nfs4_state *state;
2309 unsigned int seq;
2310 int ret;
2311
2312 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2313
2314 ret = _nfs4_proc_open(opendata);
dca78001 2315 if (ret != 0)
c21443c2
TM		 2316 goto out;
2317
2318 state = nfs4_opendata_to_nfs4_state(opendata);
2319 ret = PTR_ERR(state);
2320 if (IS_ERR(state))
2321 goto out;
2322 if (server->caps & NFS_CAP_POSIX_LOCK)
2323 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2324
275bb307 2325 dentry = opendata->dentry;
2b0143b5 2326 if (d_really_is_negative(dentry)) {
275bb307
TM		 2327 /* FIXME: Is this d_drop() ever needed? */
2328 d_drop(dentry);
2329 dentry = d_add_unique(dentry, igrab(state->inode));
2330 if (dentry == NULL) {
2331 dentry = opendata->dentry;
2332 } else if (dentry != ctx->dentry) {
2333 dput(ctx->dentry);
2334 ctx->dentry = dget(dentry);
2335 }
2336 nfs_set_verifier(dentry,
2b0143b5 2337 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2338 }
2339
c21443c2
TM		 2340 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2341 if (ret != 0)
2342 goto out;
2343
3efb9722 2344 ctx->state = state;
2b0143b5 2345 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2346 nfs_inode_attach_open_context(ctx);
2347 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2348 nfs4_schedule_stateid_recovery(server, state);
2349 }
c21443c2
TM		 2350out:
2351 return ret;
2352}
2353
1da177e4 2354/*
24ac23ab 2355 * Returns a referenced nfs4_state
1da177e4 2356 */
82be417a 2357static int _nfs4_do_open(struct inode *dir,
4197a055 2358 struct nfs_open_context *ctx,
82be417a
AA		 2359 int flags,
2360 struct iattr *sattr,
5bc2afc2
TM		 2361 struct nfs4_label *label,
2362 int *opened)
1da177e4
LT		 2363{
2364 struct nfs4_state_owner *sp;
2365 struct nfs4_state *state = NULL;
2366 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2367 struct nfs4_opendata *opendata;
4197a055
TM		 2368 struct dentry *dentry = ctx->dentry;
2369 struct rpc_cred *cred = ctx->cred;
2370 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2371 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2372 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2373 struct nfs4_label *olabel = NULL;
aac00a8d 2374 int status;
1da177e4
LT		 2375
2376 /* Protect against reboot recovery conflicts */
1da177e4 2377 status = -ENOMEM;
d1e284d5
TM		 2378 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2379 if (sp == NULL) {
1da177e4
LT		 2380 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2381 goto out_err;
2382 }
58d9714a
TM		 2383 status = nfs4_recover_expired_lease(server);
2384 if (status != 0)
b4454fe1 2385 goto err_put_state_owner;
2b0143b5
DH		 2386 if (d_really_is_positive(dentry))
2387 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2388 status = -ENOMEM;
2b0143b5 2389 if (d_really_is_positive(dentry))
49f9a0fa 2390 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2391 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2392 label, claim, GFP_KERNEL);
e56e0b78 2393 if (opendata == NULL)
95d35cb4 2394 goto err_put_state_owner;
1da177e4 2395
14c43f76
DQ		 2396 if (label) {
2397 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2398 if (IS_ERR(olabel)) {
2399 status = PTR_ERR(olabel);
2400 goto err_opendata_put;
2401 }
2402 }
2403
e911b815
TM		 2404 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2405 if (!opendata->f_attr.mdsthreshold) {
2406 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2407 if (!opendata->f_attr.mdsthreshold)
2408 goto err_free_label;
2409 }
1549210f 2410 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2411 }
2b0143b5
DH		 2412 if (d_really_is_positive(dentry))
2413 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2414
3efb9722 2415 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2416 if (status != 0)
14c43f76 2417 goto err_free_label;
3efb9722 2418 state = ctx->state;
6168f62c 2419
549b19cc
TM		 2420 if ((opendata->o_arg.open_flags & O_EXCL) &&
2421 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2422 nfs4_exclusive_attrset(opendata, sattr);
2423
2424 nfs_fattr_init(opendata->o_res.f_attr);
2425 status = nfs4_do_setattr(state->inode, cred,
2426 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2427 state, label, olabel);
2428 if (status == 0) {
f044636d
TM		 2429 nfs_setattr_update_inode(state->inode, sattr,
2430 opendata->o_res.f_attr);
aa9c2669 2431 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2432 }
0ab64e0e 2433 }
5bc2afc2
TM		 2434 if (opendata->file_created)
2435 *opened |= FILE_CREATED;
82be417a 2436
e911b815 2437 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2438 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2439 opendata->f_attr.mdsthreshold = NULL;
2440 }
82be417a 2441
14c43f76
DQ		 2442 nfs4_label_free(olabel);
2443
c6d00e63 2444 nfs4_opendata_put(opendata);
1da177e4 2445 nfs4_put_state_owner(sp);
1da177e4 2446 return 0;
14c43f76
DQ		 2447err_free_label:
2448 nfs4_label_free(olabel);
c6d00e63
TM		 2449err_opendata_put:
2450 nfs4_opendata_put(opendata);
e56e0b78
TM		 2451err_put_state_owner:
2452 nfs4_put_state_owner(sp);
1da177e4 2453out_err:
1da177e4
LT		 2454 return status;
2455}
2456
2457
82be417a 2458static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2459 struct nfs_open_context *ctx,
82be417a
AA		 2460 int flags,
2461 struct iattr *sattr,
5bc2afc2
TM		 2462 struct nfs4_label *label,
2463 int *opened)
1da177e4 2464{
49f9a0fa 2465 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2466 struct nfs4_exception exception = { };
2467 struct nfs4_state *res;
2468 int status;
2469
2470 do {
5bc2afc2 2471 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2472 res = ctx->state;
42113a75 2473 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2474 if (status == 0)
2475 break;
2476 /* NOTE: BAD_SEQID means the server and client disagree about the
2477 * book-keeping w.r.t. state-changing operations
2478 * (OPEN/CLOSE/LOCK/LOCKU...)
2479 * It is actually a sign of a bug on the client or on the server.
2480 *
2481 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2482 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2483 * have unhashed the old state_owner for us, and that we can
2484 * therefore safely retry using a new one. We should still warn
2485 * the user though...
2486 */
2487 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2488 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2489 " returned a bad sequence-id error!\n",
2490 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2491 exception.retry = 1;
2492 continue;
2493 }
550f5747
TM		 2494 /*
2495 * BAD_STATEID on OPEN means that the server cancelled our
2496 * state before it received the OPEN_CONFIRM.
2497 * Recover by retrying the request as per the discussion
2498 * on Page 181 of RFC3530.
2499 */
2500 if (status == -NFS4ERR_BAD_STATEID) {
2501 exception.retry = 1;
2502 continue;
2503 }
aac00a8d
TM		 2504 if (status == -EAGAIN) {
2505 /* We must have found a delegation */
2506 exception.retry = 1;
2507 continue;
2508 }
49f9a0fa
TM		 2509 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2510 continue;
2511 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2512 status, &exception));
2513 } while (exception.retry);
2514 return res;
2515}
2516
659bfcd6
TM		 2517static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2518 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2519 struct nfs4_state *state, struct nfs4_label *ilabel,
2520 struct nfs4_label *olabel)
1da177e4 2521{
3e4f6290 2522 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2523 struct nfs_setattrargs arg = {
3e4f6290 2524 .fh = NFS_FH(inode),
1da177e4
LT		 2525 .iap = sattr,
2526 .server = server,
2527 .bitmask = server->attr_bitmask,
1775fd3e 2528 .label = ilabel,
1da177e4
LT		 2529 };
2530 struct nfs_setattrres res = {
2531 .fattr = fattr,
1775fd3e 2532 .label = olabel,
1da177e4
LT		 2533 .server = server,
2534 };
2535 struct rpc_message msg = {
659bfcd6
TM		 2536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2537 .rpc_argp = &arg,
2538 .rpc_resp = &res,
2539 .rpc_cred = cred,
1da177e4 2540 };
26e976a8 2541 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2542 fmode_t fmode;
2543 bool truncate;
65e4308d 2544 int status;
1da177e4 2545
aa9c2669
DQ		 2546 arg.bitmask = nfs4_bitmask(server, ilabel);
2547 if (ilabel)
2548 arg.bitmask = nfs4_bitmask(server, olabel);
2549
0e574af1 2550 nfs_fattr_init(fattr);
1da177e4 2551
ee3ae84e
TM		 2552 /* Servers should only apply open mode checks for file size changes */
2553 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2554 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2555
2556 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2557 /* Use that stateid */
0418dae1 2558 } else if (truncate && state != NULL) {
2a369153
TM		 2559 struct nfs_lockowner lockowner = {
2560 .l_owner = current->files,
2561 .l_pid = current->tgid,
2562 };
0418dae1
TM		 2563 if (!nfs4_valid_open_stateid(state))
2564 return -EBADF;
2565 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2566 &lockowner) == -EIO)
2567 return -EBADF;
08e9eac4 2568 } else
f597c537 2569 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2570
7c513058 2571 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2572 if (status == 0 && state != NULL)
2573 renew_lease(server, timestamp);
65e4308d 2574 return status;
1da177e4
LT		 2575}
2576
659bfcd6
TM		 2577static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2578 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2579 struct nfs4_state *state, struct nfs4_label *ilabel,
2580 struct nfs4_label *olabel)
1da177e4 2581{
3e4f6290 2582 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2583 struct nfs4_exception exception = {
2584 .state = state,
3114ea7a 2585 .inode = inode,
a1d0b5ee 2586 };
1da177e4
LT		 2587 int err;
2588 do {
1775fd3e 2589 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2590 trace_nfs4_setattr(inode, err);
451146be
TM		 2591 switch (err) {
2592 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2593 if (!(sattr->ia_valid & ATTR_SIZE)) {
2594 pr_warn_once("NFSv4: server %s is incorrectly "
2595 "applying open mode checks to "
2596 "a SETATTR that is not "
2597 "changing file size.\n",
2598 server->nfs_client->cl_hostname);
2599 }
451146be
TM		 2600 if (state && !(state->state & FMODE_WRITE)) {
2601 err = -EBADF;
2602 if (sattr->ia_valid & ATTR_OPEN)
2603 err = -EACCES;
2604 goto out;
2605 }
2606 }
2607 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2608 } while (exception.retry);
451146be 2609out:
1da177e4
LT		 2610 return err;
2611}
2612
2613struct nfs4_closedata {
2614 struct inode *inode;
2615 struct nfs4_state *state;
2616 struct nfs_closeargs arg;
2617 struct nfs_closeres res;
516a6af6 2618 struct nfs_fattr fattr;
26e976a8 2619 unsigned long timestamp;
f7e8917a
FI		 2620 bool roc;
2621 u32 roc_barrier;
1da177e4
LT		 2622};
2623
963d8fe5 2624static void nfs4_free_closedata(void *data)
9512135d 2625{
963d8fe5
TM		 2626 struct nfs4_closedata *calldata = data;
2627 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2628 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2629
f7e8917a
FI		 2630 if (calldata->roc)
2631 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2632 nfs4_put_open_state(calldata->state);
2633 nfs_free_seqid(calldata->arg.seqid);
9512135d 2634 nfs4_put_state_owner(sp);
322b2b90 2635 nfs_sb_deactive(sb);
9512135d
TM		 2636 kfree(calldata);
2637}
2638
963d8fe5 2639static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2640{
963d8fe5 2641 struct nfs4_closedata *calldata = data;
1da177e4 2642 struct nfs4_state *state = calldata->state;
1da177e4 2643 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2644 nfs4_stateid *res_stateid = NULL;
1da177e4 2645
a3ca5651 2646 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2647 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2648 return;
42113a75 2649 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2650 /* hmm. we are done with the inode, and in the process of freeing
2651 * the state_owner. we keep this around to process errors
2652 */
1da177e4
LT		 2653 switch (task->tk_status) {
2654 case 0:
412f6c4c
TM		 2655 res_stateid = &calldata->res.stateid;
2656 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2657 pnfs_roc_set_barrier(state->inode,
2658 calldata->roc_barrier);
26e976a8 2659 renew_lease(server, calldata->timestamp);
412f6c4c 2660 break;
69794ad7 2661 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2662 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2663 case -NFS4ERR_OLD_STATEID:
2664 case -NFS4ERR_BAD_STATEID:
1da177e4 2665 case -NFS4ERR_EXPIRED:
566fcec6 2666 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2667 &state->open_stateid)) {
566fcec6
TM		 2668 rpc_restart_call_prepare(task);
2669 goto out_release;
2670 }
dc0b027d 2671 if (calldata->arg.fmode == 0)
9e33bed5 2672 break;
1da177e4 2673 default:
8478eaa1 2674 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2675 rpc_restart_call_prepare(task);
69794ad7
TM		 2676 goto out_release;
2677 }
1da177e4 2678 }
412f6c4c 2679 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2680out_release:
72211dbe 2681 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2682 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2683 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2684}
2685
4ce70ada 2686static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2687{
4ce70ada 2688 struct nfs4_closedata *calldata = data;
9512135d 2689 struct nfs4_state *state = calldata->state;
7fdab069 2690 struct inode *inode = calldata->inode;
aee7af35 2691 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2692 int call_close = 0;
9512135d 2693
a3ca5651 2694 dprintk("%s: begin!\n", __func__);
963d8fe5 2695 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2696 goto out_wait;
003707c7 2697
88069f77 2698 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2699 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2700 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2701 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2702 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2703 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2704 /* Calculate the change in open mode */
cd9288ff 2705 calldata->arg.fmode = 0;
e7616923 2706 if (state->n_rdwr == 0) {
cd9288ff
TM		 2707 if (state->n_rdonly == 0)
2708 call_close |= is_rdonly;
2709 else if (is_rdonly)
2710 calldata->arg.fmode |= FMODE_READ;
2711 if (state->n_wronly == 0)
2712 call_close |= is_wronly;
2713 else if (is_wronly)
2714 calldata->arg.fmode |= FMODE_WRITE;
2715 } else if (is_rdwr)
2716 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2717
2718 if (calldata->arg.fmode == 0)
2719 call_close |= is_rdwr;
2720
5d422301
TM		 2721 if (!nfs4_valid_open_stateid(state))
2722 call_close = 0;
4cecb76f 2723 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2724
2725 if (!call_close) {
963d8fe5 2726 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2727 goto out_no_action;
9512135d 2728 }
88069f77 2729
f7e8917a 2730 if (calldata->arg.fmode == 0) {
88069f77 2731 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2732 if (calldata->roc &&
b9536ad5
AA		 2733 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2734 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2735 goto out_wait;
b9536ad5 2736 }
f7e8917a 2737 }
6ae37339
TM		 2738 calldata->arg.share_access =
2739 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2740 calldata->arg.fmode, 0);
88069f77 2741
516a6af6 2742 nfs_fattr_init(calldata->res.fattr);
26e976a8 2743 calldata->timestamp = jiffies;
7fdab069 2744 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2745 &calldata->arg.seq_args,
2746 &calldata->res.seq_res,
2240a9e2
TM		 2747 task) != 0)
2748 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2749 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2750 return;
2751out_no_action:
2752 task->tk_action = NULL;
2753out_wait:
2754 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2755}
2756
963d8fe5 2757static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2758 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2759 .rpc_call_done = nfs4_close_done,
2760 .rpc_release = nfs4_free_closedata,
2761};
2762
fe08c546
PT		 2763static bool nfs4_roc(struct inode *inode)
2764{
40dd4b7a 2765 if (!nfs_have_layout(inode))
fe08c546 2766 return false;
fe08c546
PT		 2767 return pnfs_roc(inode);
2768}
2769
1da177e4
LT		 2770/*
2771 * It is possible for data to be read/written from a mem-mapped file
2772 * after the sys_close call (which hits the vfs layer as a flush).
2773 * This means that we can't safely call nfsv4 close on a file until
2774 * the inode is cleared. This in turn means that we are not good
2775 * NFSv4 citizens - we do not indicate to the server to update the file's
2776 * share state even when we are done with one of the three share
2777 * stateid's in the inode.
2778 *
2779 * NOTE: Caller must be holding the sp->so_owner semaphore!
2780 */
1f7977c1 2781int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2782{
4a35bd41 2783 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2784 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2785 struct nfs4_closedata *calldata;
b39e625b
TM		 2786 struct nfs4_state_owner *sp = state->owner;
2787 struct rpc_task *task;
5138fde0
TM		 2788 struct rpc_message msg = {
2789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2790 .rpc_cred = state->owner->so_cred,
2791 };
c970aa85
TM		 2792 struct rpc_task_setup task_setup_data = {
2793 .rpc_client = server->client,
5138fde0 2794 .rpc_message = &msg,
c970aa85 2795 .callback_ops = &nfs4_close_ops,
101070ca 2796 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2797 .flags = RPC_TASK_ASYNC,
2798 };
9512135d 2799 int status = -ENOMEM;
1da177e4 2800
fa940720
WAA		 2801 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2802 &task_setup_data.rpc_client, &msg);
2803
8535b2be 2804 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2805 if (calldata == NULL)
9512135d 2806 goto out;
a9c92d6b 2807 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2808 calldata->inode = state->inode;
1da177e4 2809 calldata->state = state;
4a35bd41 2810 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2811 /* Serialization for the sequence id */
63f5f796
TM		 2812 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2813 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2814 if (IS_ERR(calldata->arg.seqid))
9512135d 2815 goto out_free_calldata;
dc0b027d 2816 calldata->arg.fmode = 0;
a65318bf 2817 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2818 calldata->res.fattr = &calldata->fattr;
c1d51931 2819 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2820 calldata->res.server = server;
fe08c546 2821 calldata->roc = nfs4_roc(state->inode);
643168c2 2822 nfs_sb_active(calldata->inode->i_sb);
9512135d 2823
1174dd1f
TM		 2824 msg.rpc_argp = &calldata->arg;
2825 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2826 task_setup_data.callback_data = calldata;
2827 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2828 if (IS_ERR(task))
2829 return PTR_ERR(task);
a49c3c77
TM		 2830 status = 0;
2831 if (wait)
2832 status = rpc_wait_for_completion_task(task);
b39e625b 2833 rpc_put_task(task);
a49c3c77 2834 return status;
9512135d
TM		 2835out_free_calldata:
2836 kfree(calldata);
2837out:
b39e625b
TM		 2838 nfs4_put_open_state(state);
2839 nfs4_put_state_owner(sp);
9512135d 2840 return status;
1da177e4
LT		 2841}
2842
2b484297 2843static struct inode *
5bc2afc2
TM		 2844nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2845 int open_flags, struct iattr *attr, int *opened)
1da177e4 2846{
1da177e4 2847 struct nfs4_state *state;
aa9c2669
DQ		 2848 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2849
2850 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2851
565277f6 2852 /* Protect against concurrent sillydeletes */
5bc2afc2 2853 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2854
2855 nfs4_label_release_security(label);
2856
f46e0bd3
TM		 2857 if (IS_ERR(state))
2858 return ERR_CAST(state);
275bb307 2859 return state->inode;
1da177e4
LT		 2860}
2861
1185a552 2862static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2863{
2864 if (ctx->state == NULL)
2865 return;
2866 if (is_sync)
643168c2 2867 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2868 else
643168c2 2869 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2870}
1da177e4 2871
b944dba3
TM		 2872#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2873#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2874#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2875
1da177e4
LT		 2876static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2877{
43652ad5
BH		 2878 struct nfs4_server_caps_arg args = {
2879 .fhandle = fhandle,
2880 };
1da177e4
LT		 2881 struct nfs4_server_caps_res res = {};
2882 struct rpc_message msg = {
2883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2884 .rpc_argp = &args,
1da177e4
LT		 2885 .rpc_resp = &res,
2886 };
2887 int status;
2888
7c513058 2889 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2890 if (status == 0) {
b944dba3
TM		 2891 /* Sanity check the server answers */
2892 switch (server->nfs_client->cl_minorversion) {
2893 case 0:
2894 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2895 res.attr_bitmask[2] = 0;
2896 break;
2897 case 1:
2898 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2899 break;
2900 case 2:
2901 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2902 }
1da177e4 2903 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2904 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2905 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2906 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2907 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2908 NFS_CAP_CTIME|NFS_CAP_MTIME|
2909 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2910 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2911 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2912 server->caps |= NFS_CAP_ACLS;
2913 if (res.has_links != 0)
2914 server->caps |= NFS_CAP_HARDLINKS;
2915 if (res.has_symlinks != 0)
2916 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2917 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2918 server->caps |= NFS_CAP_FILEID;
2919 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2920 server->caps |= NFS_CAP_MODE;
2921 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2922 server->caps |= NFS_CAP_NLINK;
2923 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2924 server->caps |= NFS_CAP_OWNER;
2925 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2926 server->caps |= NFS_CAP_OWNER_GROUP;
2927 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2928 server->caps |= NFS_CAP_ATIME;
2929 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2930 server->caps |= NFS_CAP_CTIME;
2931 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2932 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2933#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2934 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2935 server->caps |= NFS_CAP_SECURITY_LABEL;
2936#endif
2937 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2938 sizeof(server->attr_bitmask));
b944dba3 2939 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2940
a65318bf
TM		 2941 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2942 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2943 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2944 server->cache_consistency_bitmask[2] = 0;
1da177e4 2945 server->acl_bitmask = res.acl_bitmask;
264e6351 2946 server->fh_expire_type = res.fh_expire_type;
1da177e4 2947 }
cccef3b9 2948
1da177e4
LT		 2949 return status;
2950}
2951
55a97593 2952int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2953{
2954 struct nfs4_exception exception = { };
2955 int err;
2956 do {
2957 err = nfs4_handle_exception(server,
2958 _nfs4_server_capabilities(server, fhandle),
2959 &exception);
2960 } while (exception.retry);
2961 return err;
2962}
2963
2964static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2965 struct nfs_fsinfo *info)
2966{
aa9c2669 2967 u32 bitmask[3];
1da177e4 2968 struct nfs4_lookup_root_arg args = {
aa9c2669 2969 .bitmask = bitmask,
1da177e4
LT		 2970 };
2971 struct nfs4_lookup_res res = {
2972 .server = server,
0e574af1 2973 .fattr = info->fattr,
1da177e4
LT		 2974 .fh = fhandle,
2975 };
2976 struct rpc_message msg = {
2977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2978 .rpc_argp = &args,
2979 .rpc_resp = &res,
2980 };
008f55d0 2981
aa9c2669
DQ		 2982 bitmask[0] = nfs4_fattr_bitmap[0];
2983 bitmask[1] = nfs4_fattr_bitmap[1];
2984 /*
2985 * Process the label in the upcoming getfattr
2986 */
2987 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2988
0e574af1 2989 nfs_fattr_init(info->fattr);
7c513058 2990 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2991}
2992
2993static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2994 struct nfs_fsinfo *info)
2995{
2996 struct nfs4_exception exception = { };
2997 int err;
2998 do {
fb8a5ba8 2999 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3000 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3001 switch (err) {
3002 case 0:
3003 case -NFS4ERR_WRONGSEC:
05e9cfb4 3004 goto out;
fb8a5ba8
BS		 3005 default:
3006 err = nfs4_handle_exception(server, err, &exception);
3007 }
1da177e4 3008 } while (exception.retry);
05e9cfb4 3009out:
1da177e4
LT		 3010 return err;
3011}
3012
8f70e95f
BS		 3013static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3014 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3015{
c2190661
TM		 3016 struct rpc_auth_create_args auth_args = {
3017 .pseudoflavor = flavor,
3018 };
8f70e95f
BS		 3019 struct rpc_auth *auth;
3020 int ret;
3021
c2190661 3022 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3023 if (IS_ERR(auth)) {
75bc8821 3024 ret = -EACCES;
8f70e95f
BS		 3025 goto out;
3026 }
3027 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3028out:
3029 return ret;
3030}
3031
9a744ba3
CL		 3032/*
3033 * Retry pseudoroot lookup with various security flavors. We do this when:
3034 *
3035 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3036 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3037 *
3038 * Returns zero on success, or a negative NFS4ERR value, or a
3039 * negative errno value.
3040 */
801a16dc 3041static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3042 struct nfs_fsinfo *info)
1da177e4 3043{
9a744ba3
CL		 3044 /* Per 3530bis 15.33.5 */
3045 static const rpc_authflavor_t flav_array[] = {
3046 RPC_AUTH_GSS_KRB5P,
3047 RPC_AUTH_GSS_KRB5I,
3048 RPC_AUTH_GSS_KRB5,
c4eafe11 3049 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3050 RPC_AUTH_NULL,
3051 };
3052 int status = -EPERM;
3053 size_t i;
6a1a1e34 3054
4d4b69dd
WAA		 3055 if (server->auth_info.flavor_len > 0) {
3056 /* try each flavor specified by user */
3057 for (i = 0; i < server->auth_info.flavor_len; i++) {
3058 status = nfs4_lookup_root_sec(server, fhandle, info,
3059 server->auth_info.flavors[i]);
3060 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3061 continue;
3062 break;
3063 }
3064 } else {
3065 /* no flavors specified by user, try default list */
3066 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3067 status = nfs4_lookup_root_sec(server, fhandle, info,
3068 flav_array[i]);
3069 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3070 continue;
3071 break;
3072 }
8f70e95f 3073 }
9a744ba3 3074
fb8a5ba8
BS		 3075 /*
3076 * -EACCESS could mean that the user doesn't have correct permissions
3077 * to access the mount. It could also mean that we tried to mount
3078 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3079 * existing mount programs don't handle -EACCES very well so it should
3080 * be mapped to -EPERM instead.
3081 */
3082 if (status == -EACCES)
3083 status = -EPERM;
801a16dc
BS		 3084 return status;
3085}
3086
2ed4b95b
CL		 3087static int nfs4_do_find_root_sec(struct nfs_server *server,
3088 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3089{
3090 int mv = server->nfs_client->cl_minorversion;
3091 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3092}
3093
3094/**
3095 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3096 * @server: initialized nfs_server handle
3097 * @fhandle: we fill in the pseudo-fs root file handle
3098 * @info: we fill in an FSINFO struct
5e6b1990 3099 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3100 *
3101 * Returns zero on success, or a negative errno.
801a16dc 3102 */
3028eb2b 3103int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3104 struct nfs_fsinfo *info,
3105 bool auth_probe)
801a16dc 3106{
c7757074 3107 int status = 0;
2ed4b95b 3108
c7757074 3109 if (!auth_probe)
5e6b1990 3110 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3111
3112 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3113 status = nfs4_do_find_root_sec(server, fhandle, info);
3114
1da177e4
LT		 3115 if (status == 0)
3116 status = nfs4_server_capabilities(server, fhandle);
3117 if (status == 0)
3118 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3119
c12e87f4 3120 return nfs4_map_errors(status);
1da177e4
LT		 3121}
3122
bae36241
BS		 3123static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3124 struct nfs_fsinfo *info)
3125{
3126 int error;
3127 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3128 struct nfs4_label *label = NULL;
bae36241
BS		 3129
3130 error = nfs4_server_capabilities(server, mntfh);
3131 if (error < 0) {
3132 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3133 return error;
3134 }
3135
14c43f76
DQ		 3136 label = nfs4_label_alloc(server, GFP_KERNEL);
3137 if (IS_ERR(label))
3138 return PTR_ERR(label);
3139
1775fd3e 3140 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3141 if (error < 0) {
3142 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3143 goto err_free_label;
bae36241
BS		 3144 }
3145
3146 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3147 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3148 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3149
14c43f76
DQ		 3150err_free_label:
3151 nfs4_label_free(label);
3152
bae36241
BS		 3153 return error;
3154}
3155
6b97fd3d
MN		 3156/*
3157 * Get locations and (maybe) other attributes of a referral.
3158 * Note that we'll actually follow the referral later when
3159 * we detect fsid mismatch in inode revalidation
3160 */
f05d147f
BS		 3161static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3162 const struct qstr *name, struct nfs_fattr *fattr,
3163 struct nfs_fh *fhandle)
6b97fd3d
MN		 3164{
3165 int status = -ENOMEM;
3166 struct page *page = NULL;
3167 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3168
3169 page = alloc_page(GFP_KERNEL);
3170 if (page == NULL)
3171 goto out;
3172 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3173 if (locations == NULL)
3174 goto out;
3175
f05d147f 3176 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3177 if (status != 0)
3178 goto out;
519ae255
CL		 3179
3180 /*
3181 * If the fsid didn't change, this is a migration event, not a
3182 * referral. Cause us to drop into the exception handler, which
3183 * will kick off migration recovery.
3184 */
6b97fd3d 3185 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3186 dprintk("%s: server did not return a different fsid for"
3187 " a referral at %s\n", __func__, name->name);
519ae255 3188 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3189 goto out;
3190 }
533eb461
AA		 3191 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3192 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3193
533eb461 3194 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3195 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3196 memset(fhandle, 0, sizeof(struct nfs_fh));
3197out:
3198 if (page)
3199 __free_page(page);
5d7ca35a 3200 kfree(locations);
6b97fd3d
MN		 3201 return status;
3202}
3203
1775fd3e
DQ		 3204static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3205 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3206{
3207 struct nfs4_getattr_arg args = {
3208 .fh = fhandle,
3209 .bitmask = server->attr_bitmask,
3210 };
3211 struct nfs4_getattr_res res = {
3212 .fattr = fattr,
1775fd3e 3213 .label = label,
1da177e4
LT		 3214 .server = server,
3215 };
3216 struct rpc_message msg = {
3217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3218 .rpc_argp = &args,
3219 .rpc_resp = &res,
3220 };
aa9c2669
DQ		 3221
3222 args.bitmask = nfs4_bitmask(server, label);
3223
0e574af1 3224 nfs_fattr_init(fattr);
7c513058 3225 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3226}
3227
1775fd3e
DQ		 3228static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3229 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3230{
3231 struct nfs4_exception exception = { };
3232 int err;
3233 do {
b5f875a9
TM		 3234 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3235 trace_nfs4_getattr(server, fhandle, fattr, err);
3236 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3237 &exception);
3238 } while (exception.retry);
3239 return err;
3240}
3241
3242/*
3243 * The file is not closed if it is opened due to the a request to change
3244 * the size of the file. The open call will not be needed once the
3245 * VFS layer lookup-intents are implemented.
3246 *
3247 * Close is called when the inode is destroyed.
3248 * If we haven't opened the file for O_WRONLY, we
3249 * need to in the size_change case to obtain a stateid.
3250 *
3251 * Got race?
3252 * Because OPEN is always done by name in nfsv4, it is
3253 * possible that we opened a different file by the same
3254 * name. We can recognize this race condition, but we
3255 * can't do anything about it besides returning an error.
3256 *
3257 * This will be fixed with VFS changes (lookup-intent).
3258 */
3259static int
3260nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3261 struct iattr *sattr)
3262{
2b0143b5 3263 struct inode *inode = d_inode(dentry);
659bfcd6 3264 struct rpc_cred *cred = NULL;
d530838b 3265 struct nfs4_state *state = NULL;
14c43f76 3266 struct nfs4_label *label = NULL;
1da177e4
LT		 3267 int status;
3268
88ac815c
PT		 3269 if (pnfs_ld_layoutret_on_setattr(inode) &&
3270 sattr->ia_valid & ATTR_SIZE &&
3271 sattr->ia_size < i_size_read(inode))
24028672 3272 pnfs_commit_and_return_layout(inode);
8a1636c4 3273
0e574af1 3274 nfs_fattr_init(fattr);
1da177e4 3275
2669940d
AA		 3276 /* Deal with open(O_TRUNC) */
3277 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3278 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3279
3280 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3281 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3282 return 0;
3283
d530838b 3284 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3285 if (sattr->ia_valid & ATTR_FILE) {
3286 struct nfs_open_context *ctx;
3287
3288 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3289 if (ctx) {
3290 cred = ctx->cred;
3291 state = ctx->state;
3292 }
659bfcd6 3293 }
08e9eac4 3294
14c43f76
DQ		 3295 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3296 if (IS_ERR(label))
3297 return PTR_ERR(label);
3298
3299 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3300 if (status == 0) {
f044636d 3301 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3302 nfs_setsecurity(inode, fattr, label);
3303 }
14c43f76 3304 nfs4_label_free(label);
1da177e4
LT		 3305 return status;
3306}
3307
0c2e53f1
TM		 3308static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3309 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3310 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3311{
0c2e53f1 3312 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3313 int status;
3314 struct nfs4_lookup_arg args = {
3315 .bitmask = server->attr_bitmask,
0c2e53f1 3316 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3317 .name = name,
3318 };
3319 struct nfs4_lookup_res res = {
3320 .server = server,
3321 .fattr = fattr,
aa9c2669 3322 .label = label,
2b3de441
DH		 3323 .fh = fhandle,
3324 };
3325 struct rpc_message msg = {
3326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3327 .rpc_argp = &args,
3328 .rpc_resp = &res,
3329 };
3330
aa9c2669
DQ		 3331 args.bitmask = nfs4_bitmask(server, label);
3332
2b3de441
DH		 3333 nfs_fattr_init(fattr);
3334
1da177e4 3335 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3336 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3337 dprintk("NFS reply lookup: %d\n", status);
3338 return status;
3339}
3340
72de53ec 3341static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3342{
7ebb9315 3343 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3344 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3345 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3346 fattr->nlink = 2;
3347}
3348
72de53ec
BS		 3349static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3350 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3351 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3352{
3353 struct nfs4_exception exception = { };
72de53ec 3354 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3355 int err;
3356 do {
1775fd3e 3357 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3358 trace_nfs4_lookup(dir, name, err);
72de53ec 3359 switch (err) {
08ef7bd3 3360 case -NFS4ERR_BADNAME:
72de53ec
BS		 3361 err = -ENOENT;
3362 goto out;
0c2e53f1 3363 case -NFS4ERR_MOVED:
f05d147f 3364 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3365 if (err == -NFS4ERR_MOVED)
3366 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3367 goto out;
0c2e53f1 3368 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3369 err = -EPERM;
3370 if (client != *clnt)
3371 goto out;
66b06860 3372 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3373 if (IS_ERR(client))
3374 return PTR_ERR(client);
3375
3376 exception.retry = 1;
3377 break;
3378 default:
3379 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3380 }
1da177e4 3381 } while (exception.retry);
72de53ec
BS		 3382
3383out:
3384 if (err == 0)
3385 *clnt = client;
3386 else if (client != *clnt)
3387 rpc_shutdown_client(client);
3388
1da177e4
LT		 3389 return err;
3390}
3391
80a16b21 3392static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3393 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3394 struct nfs4_label *label)
72de53ec
BS		 3395{
3396 int status;
3397 struct rpc_clnt *client = NFS_CLIENT(dir);
3398
1775fd3e 3399 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3400 if (client != NFS_CLIENT(dir)) {
3401 rpc_shutdown_client(client);
3402 nfs_fixup_secinfo_attributes(fattr);
3403 }
3404 return status;
3405}
3406
f05d147f
BS		 3407struct rpc_clnt *
3408nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3409 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3410{
b72888cb 3411 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3412 int status;
f05d147f 3413
1775fd3e 3414 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3415 if (status < 0)
f05d147f 3416 return ERR_PTR(status);
b72888cb 3417 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3418}
3419
1da177e4
LT		 3420static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3421{
76b32999 3422 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3423 struct nfs4_accessargs args = {
3424 .fh = NFS_FH(inode),
a4980e78 3425 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3426 };
3427 struct nfs4_accessres res = {
3428 .server = server,
1da177e4 3429 };
1da177e4
LT		 3430 struct rpc_message msg = {
3431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3432 .rpc_argp = &args,
3433 .rpc_resp = &res,
3434 .rpc_cred = entry->cred,
3435 };
3436 int mode = entry->mask;
aa9c2669 3437 int status = 0;
1da177e4
LT		 3438
3439 /*
3440 * Determine which access bits we want to ask for...
3441 */
3442 if (mode & MAY_READ)
3443 args.access |= NFS4_ACCESS_READ;
3444 if (S_ISDIR(inode->i_mode)) {
3445 if (mode & MAY_WRITE)
3446 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3447 if (mode & MAY_EXEC)
3448 args.access |= NFS4_ACCESS_LOOKUP;
3449 } else {
3450 if (mode & MAY_WRITE)
3451 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3452 if (mode & MAY_EXEC)
3453 args.access |= NFS4_ACCESS_EXECUTE;
3454 }
c407d41a
TM		 3455
3456 res.fattr = nfs_alloc_fattr();
3457 if (res.fattr == NULL)
3458 return -ENOMEM;
3459
7c513058 3460 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3461 if (!status) {
6168f62c 3462 nfs_access_set_mask(entry, res.access);
c407d41a 3463 nfs_refresh_inode(inode, res.fattr);
1da177e4 3464 }
c407d41a 3465 nfs_free_fattr(res.fattr);
1da177e4
LT		 3466 return status;
3467}
3468
3469static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3470{
3471 struct nfs4_exception exception = { };
3472 int err;
3473 do {
c1578b76
TM		 3474 err = _nfs4_proc_access(inode, entry);
3475 trace_nfs4_access(inode, err);
3476 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3477 &exception);
3478 } while (exception.retry);
3479 return err;
3480}
3481
3482/*
3483 * TODO: For the time being, we don't try to get any attributes
3484 * along with any of the zero-copy operations READ, READDIR,
3485 * READLINK, WRITE.
3486 *
3487 * In the case of the first three, we want to put the GETATTR
3488 * after the read-type operation -- this is because it is hard
3489 * to predict the length of a GETATTR response in v4, and thus
3490 * align the READ data correctly. This means that the GETATTR
3491 * may end up partially falling into the page cache, and we should
3492 * shift it into the 'tail' of the xdr_buf before processing.
3493 * To do this efficiently, we need to know the total length
3494 * of data received, which doesn't seem to be available outside
3495 * of the RPC layer.
3496 *
3497 * In the case of WRITE, we also want to put the GETATTR after
3498 * the operation -- in this case because we want to make sure
140150db 3499 * we get the post-operation mtime and size.
1da177e4
LT		 3500 *
3501 * Both of these changes to the XDR layer would in fact be quite
3502 * minor, but I decided to leave them for a subsequent patch.
3503 */
3504static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3505 unsigned int pgbase, unsigned int pglen)
3506{
3507 struct nfs4_readlink args = {
3508 .fh = NFS_FH(inode),
3509 .pgbase = pgbase,
3510 .pglen = pglen,
3511 .pages = &page,
3512 };
f50c7000 3513 struct nfs4_readlink_res res;
1da177e4
LT		 3514 struct rpc_message msg = {
3515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3516 .rpc_argp = &args,
f50c7000 3517 .rpc_resp = &res,
1da177e4
LT		 3518 };
3519
7c513058 3520 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3521}
3522
3523static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3524 unsigned int pgbase, unsigned int pglen)
3525{
3526 struct nfs4_exception exception = { };
3527 int err;
3528 do {
c1578b76
TM		 3529 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3530 trace_nfs4_readlink(inode, err);
3531 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3532 &exception);
3533 } while (exception.retry);
3534 return err;
3535}
3536
1da177e4 3537/*
8867fe58 3538 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3539 */
1da177e4
LT		 3540static int
3541nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3542 int flags)
1da177e4 3543{
aa9c2669 3544 struct nfs4_label l, *ilabel = NULL;
8867fe58 3545 struct nfs_open_context *ctx;
1da177e4 3546 struct nfs4_state *state;
5bc2afc2 3547 int opened = 0;
1da177e4
LT		 3548 int status = 0;
3549
8867fe58
MS		 3550 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3551 if (IS_ERR(ctx))
3552 return PTR_ERR(ctx);
3553
aa9c2669
DQ		 3554 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3555
a8a5da99 3556 sattr->ia_mode &= ~current_umask();
5bc2afc2 3557 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3558 if (IS_ERR(state)) {
3559 status = PTR_ERR(state);
c0204fd2 3560 goto out;
1da177e4 3561 }
1da177e4 3562out:
aa9c2669 3563 nfs4_label_release_security(ilabel);
8867fe58 3564 put_nfs_open_context(ctx);
1da177e4
LT		 3565 return status;
3566}
3567
3568static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3569{
16e42959 3570 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3571 struct nfs_removeargs args = {
1da177e4 3572 .fh = NFS_FH(dir),
26fe5750 3573 .name = *name,
16e42959 3574 };
4fdc17b2 3575 struct nfs_removeres res = {
16e42959 3576 .server = server,
1da177e4 3577 };
1da177e4 3578 struct rpc_message msg = {
4fdc17b2
TM		 3579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3580 .rpc_argp = &args,
3581 .rpc_resp = &res,
1da177e4 3582 };
778d2817 3583 int status;
1da177e4 3584
7c513058 3585 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3586 if (status == 0)
16e42959 3587 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3588 return status;
3589}
3590
3591static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3592{
3593 struct nfs4_exception exception = { };
3594 int err;
3595 do {
078ea3df
TM		 3596 err = _nfs4_proc_remove(dir, name);
3597 trace_nfs4_remove(dir, name, err);
3598 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3599 &exception);
3600 } while (exception.retry);
3601 return err;
3602}
3603
e4eff1a6 3604static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3605{
e4eff1a6
TM		 3606 struct nfs_server *server = NFS_SERVER(dir);
3607 struct nfs_removeargs *args = msg->rpc_argp;
3608 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3609
e4eff1a6 3610 res->server = server;
1da177e4 3611 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3612 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3613
3614 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3615}
3616
34e137cc
BS		 3617static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3618{
d9afbd1b
TM		 3619 nfs4_setup_sequence(NFS_SERVER(data->dir),
3620 &data->args.seq_args,
3621 &data->res.seq_res,
3622 task);
1da177e4
LT		 3623}
3624
e4eff1a6 3625static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3626{
078ea3df
TM		 3627 struct nfs_unlinkdata *data = task->tk_calldata;
3628 struct nfs_removeres *res = &data->res;
e4eff1a6 3629
14516c3a
TM		 3630 if (!nfs4_sequence_done(task, &res->seq_res))
3631 return 0;
8478eaa1
N		 3632 if (nfs4_async_handle_error(task, res->server, NULL,
3633 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3634 return 0;
3635 update_changeattr(dir, &res->cinfo);
e4eff1a6 3636 return 1;
1da177e4
LT		 3637}
3638
d3d4152a
JL		 3639static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3640{
3641 struct nfs_server *server = NFS_SERVER(dir);
3642 struct nfs_renameargs *arg = msg->rpc_argp;
3643 struct nfs_renameres *res = msg->rpc_resp;
3644
3645 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3646 res->server = server;
a9c92d6b 3647 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3648}
3649
c6bfa1a1
BS		 3650static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3651{
d9afbd1b
TM		 3652 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3653 &data->args.seq_args,
3654 &data->res.seq_res,
3655 task);
d3d4152a
JL		 3656}
3657
3658static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3659 struct inode *new_dir)
3660{
fbc6f7c2
TM		 3661 struct nfs_renamedata *data = task->tk_calldata;
3662 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3663
3664 if (!nfs4_sequence_done(task, &res->seq_res))
3665 return 0;
8478eaa1 3666 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3667 return 0;
3668
3669 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3670 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3671 return 1;
3672}
3673
1da177e4
LT		 3674static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3675{
91ba2eee 3676 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3677 struct nfs4_link_arg arg = {
3678 .fh = NFS_FH(inode),
3679 .dir_fh = NFS_FH(dir),
3680 .name = name,
91ba2eee
TM		 3681 .bitmask = server->attr_bitmask,
3682 };
91ba2eee
TM		 3683 struct nfs4_link_res res = {
3684 .server = server,
1775fd3e 3685 .label = NULL,
1da177e4 3686 };
1da177e4
LT		 3687 struct rpc_message msg = {
3688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3689 .rpc_argp = &arg,
91ba2eee 3690 .rpc_resp = &res,
1da177e4 3691 };
136f2627
TM		 3692 int status = -ENOMEM;
3693
3694 res.fattr = nfs_alloc_fattr();
778d2817 3695 if (res.fattr == NULL)
136f2627 3696 goto out;
1da177e4 3697
14c43f76
DQ		 3698 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3699 if (IS_ERR(res.label)) {
3700 status = PTR_ERR(res.label);
3701 goto out;
3702 }
aa9c2669 3703 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3704
7c513058 3705 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3706 if (!status) {
3707 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3708 status = nfs_post_op_update_inode(inode, res.fattr);
3709 if (!status)
3710 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3711 }
14c43f76
DQ		 3712
3713
3714 nfs4_label_free(res.label);
3715
136f2627 3716out:
136f2627 3717 nfs_free_fattr(res.fattr);
1da177e4
LT		 3718 return status;
3719}
3720
3721static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3722{
3723 struct nfs4_exception exception = { };
3724 int err;
3725 do {
3726 err = nfs4_handle_exception(NFS_SERVER(inode),
3727 _nfs4_proc_link(inode, dir, name),
3728 &exception);
3729 } while (exception.retry);
3730 return err;
3731}
3732
57dc9a57
TM		 3733struct nfs4_createdata {
3734 struct rpc_message msg;
3735 struct nfs4_create_arg arg;
3736 struct nfs4_create_res res;
3737 struct nfs_fh fh;
3738 struct nfs_fattr fattr;
1775fd3e 3739 struct nfs4_label *label;
57dc9a57
TM		 3740};
3741
3742static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3743 struct qstr *name, struct iattr *sattr, u32 ftype)
3744{
3745 struct nfs4_createdata *data;
3746
3747 data = kzalloc(sizeof(*data), GFP_KERNEL);
3748 if (data != NULL) {
3749 struct nfs_server *server = NFS_SERVER(dir);
3750
14c43f76
DQ		 3751 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3752 if (IS_ERR(data->label))
3753 goto out_free;
3754
57dc9a57
TM		 3755 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3756 data->msg.rpc_argp = &data->arg;
3757 data->msg.rpc_resp = &data->res;
3758 data->arg.dir_fh = NFS_FH(dir);
3759 data->arg.server = server;
3760 data->arg.name = name;
3761 data->arg.attrs = sattr;
3762 data->arg.ftype = ftype;
aa9c2669 3763 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3764 data->res.server = server;
3765 data->res.fh = &data->fh;
3766 data->res.fattr = &data->fattr;
1775fd3e 3767 data->res.label = data->label;
57dc9a57 3768 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3769 }
3770 return data;
14c43f76
DQ		 3771out_free:
3772 kfree(data);
3773 return NULL;
57dc9a57
TM		 3774}
3775
3776static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3777{
7c513058 3778 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3779 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3780 if (status == 0) {
3781 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3782 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3783 }
3784 return status;
3785}
3786
3787static void nfs4_free_createdata(struct nfs4_createdata *data)
3788{
14c43f76 3789 nfs4_label_free(data->label);
57dc9a57
TM		 3790 kfree(data);
3791}
3792
4f390c15 3793static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3794 struct page *page, unsigned int len, struct iattr *sattr,
3795 struct nfs4_label *label)
1da177e4 3796{
57dc9a57
TM		 3797 struct nfs4_createdata *data;
3798 int status = -ENAMETOOLONG;
1da177e4 3799
94a6d753 3800 if (len > NFS4_MAXPATHLEN)
57dc9a57 3801 goto out;
4f390c15 3802
57dc9a57
TM		 3803 status = -ENOMEM;
3804 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3805 if (data == NULL)
3806 goto out;
3807
3808 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3809 data->arg.u.symlink.pages = &page;
3810 data->arg.u.symlink.len = len;
1775fd3e 3811 data->arg.label = label;
1da177e4 3812
57dc9a57
TM		 3813 status = nfs4_do_create(dir, dentry, data);
3814
3815 nfs4_free_createdata(data);
3816out:
1da177e4
LT		 3817 return status;
3818}
3819
4f390c15 3820static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3821 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3822{
3823 struct nfs4_exception exception = { };
aa9c2669 3824 struct nfs4_label l, *label = NULL;
1da177e4 3825 int err;
aa9c2669
DQ		 3826
3827 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3828
1da177e4 3829 do {
078ea3df
TM		 3830 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3831 trace_nfs4_symlink(dir, &dentry->d_name, err);
3832 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3833 &exception);
3834 } while (exception.retry);
aa9c2669
DQ		 3835
3836 nfs4_label_release_security(label);
1da177e4
LT		 3837 return err;
3838}
3839
3840static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3841 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3842{
57dc9a57
TM		 3843 struct nfs4_createdata *data;
3844 int status = -ENOMEM;
1da177e4 3845
57dc9a57
TM		 3846 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3847 if (data == NULL)
3848 goto out;
3849
1775fd3e 3850 data->arg.label = label;
57dc9a57
TM		 3851 status = nfs4_do_create(dir, dentry, data);
3852
3853 nfs4_free_createdata(data);
3854out:
1da177e4
LT		 3855 return status;
3856}
3857
3858static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3859 struct iattr *sattr)
3860{
3861 struct nfs4_exception exception = { };
aa9c2669 3862 struct nfs4_label l, *label = NULL;
1da177e4 3863 int err;
a8a5da99 3864
aa9c2669
DQ		 3865 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3866
a8a5da99 3867 sattr->ia_mode &= ~current_umask();
1da177e4 3868 do {
078ea3df
TM		 3869 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3870 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3871 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3872 &exception);
3873 } while (exception.retry);
aa9c2669
DQ		 3874 nfs4_label_release_security(label);
3875
1da177e4
LT		 3876 return err;
3877}
3878
3879static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3880 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3881{
2b0143b5 3882 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3883 struct nfs4_readdir_arg args = {
3884 .fh = NFS_FH(dir),
56e4ebf8 3885 .pages = pages,
1da177e4
LT		 3886 .pgbase = 0,
3887 .count = count,
2b0143b5 3888 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3889 .plus = plus,
1da177e4
LT		 3890 };
3891 struct nfs4_readdir_res res;
3892 struct rpc_message msg = {
3893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3894 .rpc_argp = &args,
3895 .rpc_resp = &res,
3896 .rpc_cred = cred,
3897 };
3898 int status;
3899
6de1472f
AV		 3900 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3901 dentry,
eadf4598 3902 (unsigned long long)cookie);
c3f52af3 3903 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3904 res.pgbase = args.pgbase;
7c513058 3905 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3906 if (status >= 0) {
c3f52af3 3907 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3908 status += args.pgbase;
3909 }
c4812998
TM		 3910
3911 nfs_invalidate_atime(dir);
3912
3110ff80 3913 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3914 return status;
3915}
3916
3917static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3918 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3919{
3920 struct nfs4_exception exception = { };
3921 int err;
3922 do {
c1578b76
TM		 3923 err = _nfs4_proc_readdir(dentry, cred, cookie,
3924 pages, count, plus);
2b0143b5
DH		 3925 trace_nfs4_readdir(d_inode(dentry), err);
3926 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3927 &exception);
3928 } while (exception.retry);
3929 return err;
3930}
3931
3932static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3933 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3934{
57dc9a57
TM		 3935 struct nfs4_createdata *data;
3936 int mode = sattr->ia_mode;
3937 int status = -ENOMEM;
1da177e4 3938
57dc9a57
TM		 3939 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3940 if (data == NULL)
3941 goto out;
3942
1da177e4 3943 if (S_ISFIFO(mode))
57dc9a57 3944 data->arg.ftype = NF4FIFO;
1da177e4 3945 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3946 data->arg.ftype = NF4BLK;
3947 data->arg.u.device.specdata1 = MAJOR(rdev);
3948 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3949 }
3950 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3951 data->arg.ftype = NF4CHR;
3952 data->arg.u.device.specdata1 = MAJOR(rdev);
3953 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3954 } else if (!S_ISSOCK(mode)) {
3955 status = -EINVAL;
3956 goto out_free;
1da177e4 3957 }
1775fd3e 3958
aa9c2669 3959 data->arg.label = label;
57dc9a57 3960 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3961out_free:
57dc9a57
TM		 3962 nfs4_free_createdata(data);
3963out:
1da177e4
LT		 3964 return status;
3965}
3966
3967static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3968 struct iattr *sattr, dev_t rdev)
3969{
3970 struct nfs4_exception exception = { };
aa9c2669 3971 struct nfs4_label l, *label = NULL;
1da177e4 3972 int err;
a8a5da99 3973
aa9c2669
DQ		 3974 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3975
a8a5da99 3976 sattr->ia_mode &= ~current_umask();
1da177e4 3977 do {
078ea3df
TM		 3978 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3979 trace_nfs4_mknod(dir, &dentry->d_name, err);
3980 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3981 &exception);
3982 } while (exception.retry);
aa9c2669
DQ		 3983
3984 nfs4_label_release_security(label);
3985
1da177e4
LT		 3986 return err;
3987}
3988
3989static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3990 struct nfs_fsstat *fsstat)
3991{
3992 struct nfs4_statfs_arg args = {
3993 .fh = fhandle,
3994 .bitmask = server->attr_bitmask,
3995 };
24ad148a
BH		 3996 struct nfs4_statfs_res res = {
3997 .fsstat = fsstat,
3998 };
1da177e4
LT		 3999 struct rpc_message msg = {
4000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4001 .rpc_argp = &args,
24ad148a 4002 .rpc_resp = &res,
1da177e4
LT		 4003 };
4004
0e574af1 4005 nfs_fattr_init(fsstat->fattr);
7c513058 4006 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4007}
4008
4009static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4010{
4011 struct nfs4_exception exception = { };
4012 int err;
4013 do {
4014 err = nfs4_handle_exception(server,
4015 _nfs4_proc_statfs(server, fhandle, fsstat),
4016 &exception);
4017 } while (exception.retry);
4018 return err;
4019}
4020
4021static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4022 struct nfs_fsinfo *fsinfo)
4023{
4024 struct nfs4_fsinfo_arg args = {
4025 .fh = fhandle,
4026 .bitmask = server->attr_bitmask,
4027 };
3dda5e43
BH		 4028 struct nfs4_fsinfo_res res = {
4029 .fsinfo = fsinfo,
4030 };
1da177e4
LT		 4031 struct rpc_message msg = {
4032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4033 .rpc_argp = &args,
3dda5e43 4034 .rpc_resp = &res,
1da177e4
LT		 4035 };
4036
7c513058 4037 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4038}
4039
4040static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4041{
4042 struct nfs4_exception exception = { };
83ca7f5a 4043 unsigned long now = jiffies;
1da177e4
LT		 4044 int err;
4045
4046 do {
83ca7f5a 4047 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4048 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4049 if (err == 0) {
4050 struct nfs_client *clp = server->nfs_client;
4051
4052 spin_lock(&clp->cl_lock);
4053 clp->cl_lease_time = fsinfo->lease_time * HZ;
4054 clp->cl_last_renewal = now;
4055 spin_unlock(&clp->cl_lock);
4056 break;
4057 }
4058 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4059 } while (exception.retry);
4060 return err;
4061}
4062
4063static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4064{
e38eb650
BS		 4065 int error;
4066
0e574af1 4067 nfs_fattr_init(fsinfo->fattr);
e38eb650 4068 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4069 if (error == 0) {
4070 /* block layout checks this! */
4071 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4072 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4073 }
e38eb650
BS		 4074
4075 return error;
1da177e4
LT		 4076}
4077
4078static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4079 struct nfs_pathconf *pathconf)
4080{
4081 struct nfs4_pathconf_arg args = {
4082 .fh = fhandle,
4083 .bitmask = server->attr_bitmask,
4084 };
d45b2989
BH		 4085 struct nfs4_pathconf_res res = {
4086 .pathconf = pathconf,
4087 };
1da177e4
LT		 4088 struct rpc_message msg = {
4089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4090 .rpc_argp = &args,
d45b2989 4091 .rpc_resp = &res,
1da177e4
LT		 4092 };
4093
4094 /* None of the pathconf attributes are mandatory to implement */
4095 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4096 memset(pathconf, 0, sizeof(*pathconf));
4097 return 0;
4098 }
4099
0e574af1 4100 nfs_fattr_init(pathconf->fattr);
7c513058 4101 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4102}
4103
4104static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4105 struct nfs_pathconf *pathconf)
4106{
4107 struct nfs4_exception exception = { };
4108 int err;
4109
4110 do {
4111 err = nfs4_handle_exception(server,
4112 _nfs4_proc_pathconf(server, fhandle, pathconf),
4113 &exception);
4114 } while (exception.retry);
4115 return err;
4116}
4117
5521abfd 4118int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4119 const struct nfs_open_context *ctx,
4120 const struct nfs_lock_context *l_ctx,
4121 fmode_t fmode)
4122{
4123 const struct nfs_lockowner *lockowner = NULL;
4124
4125 if (l_ctx != NULL)
4126 lockowner = &l_ctx->lockowner;
5521abfd 4127 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4128}
4129EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4130
5521abfd
TM		 4131static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4132 const struct nfs_open_context *ctx,
4133 const struct nfs_lock_context *l_ctx,
4134 fmode_t fmode)
4135{
4136 nfs4_stateid current_stateid;
4137
e1253be0
TM		 4138 /* If the current stateid represents a lost lock, then exit */
4139 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4140 return true;
5521abfd
TM		 4141 return nfs4_stateid_match(stateid, &current_stateid);
4142}
4143
4144static bool nfs4_error_stateid_expired(int err)
4145{
4146 switch (err) {
4147 case -NFS4ERR_DELEG_REVOKED:
4148 case -NFS4ERR_ADMIN_REVOKED:
4149 case -NFS4ERR_BAD_STATEID:
4150 case -NFS4ERR_STALE_STATEID:
4151 case -NFS4ERR_OLD_STATEID:
4152 case -NFS4ERR_OPENMODE:
4153 case -NFS4ERR_EXPIRED:
4154 return true;
4155 }
4156 return false;
4157}
4158
d45f60c6 4159void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4160{
d45f60c6 4161 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4162}
4163
d45f60c6 4164static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4165{
d45f60c6 4166 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4167
d45f60c6
WAA		 4168 trace_nfs4_read(hdr, task->tk_status);
4169 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4170 hdr->args.context->state,
4171 NULL) == -EAGAIN) {
d00c5d43 4172 rpc_restart_call_prepare(task);
ec06c096 4173 return -EAGAIN;
1da177e4 4174 }
8850df99 4175
d45f60c6 4176 __nfs4_read_done_cb(hdr);
1da177e4 4177 if (task->tk_status > 0)
d45f60c6 4178 renew_lease(server, hdr->timestamp);
ec06c096 4179 return 0;
1da177e4
LT		 4180}
4181
5521abfd 4182static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4183 struct nfs_pgio_args *args)
5521abfd
TM		 4184{
4185
4186 if (!nfs4_error_stateid_expired(task->tk_status) ||
4187 nfs4_stateid_is_current(&args->stateid,
4188 args->context,
4189 args->lock_context,
4190 FMODE_READ))
4191 return false;
4192 rpc_restart_call_prepare(task);
4193 return true;
4194}
4195
d45f60c6 4196static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4197{
4198
4199 dprintk("--> %s\n", __func__);
4200
d45f60c6 4201 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4202 return -EAGAIN;
d45f60c6 4203 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4204 return -EAGAIN;
d45f60c6
WAA		 4205 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4206 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4207}
4208
d45f60c6
WAA		 4209static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4210 struct rpc_message *msg)
1da177e4 4211{
d45f60c6
WAA		 4212 hdr->timestamp = jiffies;
4213 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4214 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4215 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4216}
4217
d45f60c6
WAA		 4218static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4219 struct nfs_pgio_header *hdr)
ea7c3303 4220{
d45f60c6
WAA		 4221 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4222 &hdr->args.seq_args,
4223 &hdr->res.seq_res,
9b206149 4224 task))
ef1820f9 4225 return 0;
d45f60c6
WAA		 4226 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4227 hdr->args.lock_context,
4228 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4229 return -EIO;
d45f60c6 4230 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4231 return -EIO;
4232 return 0;
1da177e4
LT		 4233}
4234
d45f60c6
WAA		 4235static int nfs4_write_done_cb(struct rpc_task *task,
4236 struct nfs_pgio_header *hdr)
1da177e4 4237{
d45f60c6 4238 struct inode *inode = hdr->inode;
8478eaa1 4239
d45f60c6
WAA		 4240 trace_nfs4_write(hdr, task->tk_status);
4241 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4242 hdr->args.context->state,
4243 NULL) == -EAGAIN) {
d00c5d43 4244 rpc_restart_call_prepare(task);
788e7a89 4245 return -EAGAIN;
1da177e4 4246 }
4f9838c7 4247 if (task->tk_status >= 0) {
d45f60c6 4248 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4249 nfs_writeback_update_inode(hdr);
4f9838c7 4250 }
788e7a89 4251 return 0;
1da177e4
LT		 4252}
4253
5521abfd 4254static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4255 struct nfs_pgio_args *args)
5521abfd
TM		 4256{
4257
4258 if (!nfs4_error_stateid_expired(task->tk_status) ||
4259 nfs4_stateid_is_current(&args->stateid,
4260 args->context,
4261 args->lock_context,
4262 FMODE_WRITE))
4263 return false;
4264 rpc_restart_call_prepare(task);
4265 return true;
4266}
4267
d45f60c6 4268static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4269{
d45f60c6 4270 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4271 return -EAGAIN;
d45f60c6 4272 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4273 return -EAGAIN;
d45f60c6
WAA		 4274 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4275 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4276}
4277
5a37f851 4278static
d45f60c6 4279bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4280{
5a37f851 4281 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4282 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4283 return false;
4284 /* Otherwise, request attributes if and only if we don't hold
4285 * a delegation
4286 */
011e2a7f 4287 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4288}
a69aef14 4289
d45f60c6
WAA		 4290static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4291 struct rpc_message *msg)
1da177e4 4292{
d45f60c6 4293 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4294
d45f60c6
WAA		 4295 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4296 hdr->args.bitmask = NULL;
4297 hdr->res.fattr = NULL;
7ffd1064 4298 } else
d45f60c6 4299 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4300
d45f60c6
WAA		 4301 if (!hdr->pgio_done_cb)
4302 hdr->pgio_done_cb = nfs4_write_done_cb;
4303 hdr->res.server = server;
4304 hdr->timestamp = jiffies;
1da177e4 4305
bdc7f021 4306 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4307 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4308}
4309
0b7c0153 4310static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4311{
d9afbd1b
TM		 4312 nfs4_setup_sequence(NFS_SERVER(data->inode),
4313 &data->args.seq_args,
4314 &data->res.seq_res,
4315 task);
1da177e4
LT		 4316}
4317
0b7c0153 4318static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4319{
1da177e4 4320 struct inode *inode = data->inode;
14516c3a 4321
cc668ab3 4322 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4323 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4324 NULL, NULL) == -EAGAIN) {
d00c5d43 4325 rpc_restart_call_prepare(task);
788e7a89 4326 return -EAGAIN;
1da177e4 4327 }
788e7a89 4328 return 0;
1da177e4
LT		 4329}
4330
0b7c0153 4331static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4332{
4333 if (!nfs4_sequence_done(task, &data->res.seq_res))
4334 return -EAGAIN;
0b7c0153 4335 return data->commit_done_cb(task, data);
5f452431
FI		 4336}
4337
0b7c0153 4338static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4339{
788e7a89 4340 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4341
0b7c0153
FI		 4342 if (data->commit_done_cb == NULL)
4343 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4344 data->res.server = server;
bdc7f021 4345 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4346 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4347}
4348
9bc4e3ca
CL		 4349struct nfs4_renewdata {
4350 struct nfs_client *client;
4351 unsigned long timestamp;
4352};
4353
1da177e4
LT		 4354/*
4355 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4356 * standalone procedure for queueing an asynchronous RENEW.
4357 */
9bc4e3ca 4358static void nfs4_renew_release(void *calldata)
dc96aef9 4359{
9bc4e3ca
CL		 4360 struct nfs4_renewdata *data = calldata;
4361 struct nfs_client *clp = data->client;
dc96aef9 4362
0851de06
AB		 4363 if (atomic_read(&clp->cl_count) > 1)
4364 nfs4_schedule_state_renewal(clp);
4365 nfs_put_client(clp);
9bc4e3ca 4366 kfree(data);
dc96aef9
AB		 4367}
4368
9bc4e3ca 4369static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4370{
9bc4e3ca
CL		 4371 struct nfs4_renewdata *data = calldata;
4372 struct nfs_client *clp = data->client;
4373 unsigned long timestamp = data->timestamp;
1da177e4 4374
c6d01c6f 4375 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4376 switch (task->tk_status) {
4377 case 0:
4378 break;
4379 case -NFS4ERR_LEASE_MOVED:
4380 nfs4_schedule_lease_moved_recovery(clp);
4381 break;
4382 default:
95baa25c 4383 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4384 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4385 return;
4386 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4387 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4388 return;
4389 }
4390 nfs4_schedule_path_down_recovery(clp);
1da177e4 4391 }
452e9352 4392 do_renew_lease(clp, timestamp);
1da177e4
LT		 4393}
4394
963d8fe5
TM		 4395static const struct rpc_call_ops nfs4_renew_ops = {
4396 .rpc_call_done = nfs4_renew_done,
dc96aef9 4397 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4398};
4399
2f60ea6b 4400static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4401{
4402 struct rpc_message msg = {
4403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4404 .rpc_argp = clp,
b4454fe1 4405 .rpc_cred = cred,
1da177e4 4406 };
9bc4e3ca 4407 struct nfs4_renewdata *data;
1da177e4 4408
2f60ea6b
TM		 4409 if (renew_flags == 0)
4410 return 0;
0851de06
AB		 4411 if (!atomic_inc_not_zero(&clp->cl_count))
4412 return -EIO;
b569ad34 4413 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4414 if (data == NULL)
4415 return -ENOMEM;
4416 data->client = clp;
4417 data->timestamp = jiffies;
bc7a05ca 4418 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4419 &nfs4_renew_ops, data);
1da177e4
LT		 4420}
4421
8534d4ec 4422static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4423{
4424 struct rpc_message msg = {
4425 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4426 .rpc_argp = clp,
b4454fe1 4427 .rpc_cred = cred,
1da177e4
LT		 4428 };
4429 unsigned long now = jiffies;
4430 int status;
4431
bc7a05ca 4432 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4433 if (status < 0)
4434 return status;
452e9352 4435 do_renew_lease(clp, now);
1da177e4
LT		 4436 return 0;
4437}
4438
aa1870af
BF		 4439static inline int nfs4_server_supports_acls(struct nfs_server *server)
4440{
7dd7d959 4441 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4442}
4443
21f498c2
TM		 4444/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4445 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4446 * the stack.
4447 */
21f498c2 4448#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4449
e9e3d724
NH		 4450static int buf_to_pages_noslab(const void *buf, size_t buflen,
4451 struct page **pages, unsigned int *pgbase)
4452{
4453 struct page *newpage, **spages;
4454 int rc = 0;
4455 size_t len;
4456 spages = pages;
4457
4458 do {
21f498c2 4459 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4460 newpage = alloc_page(GFP_KERNEL);
4461
4462 if (newpage == NULL)
4463 goto unwind;
4464 memcpy(page_address(newpage), buf, len);
4465 buf += len;
4466 buflen -= len;
4467 *pages++ = newpage;
4468 rc++;
4469 } while (buflen != 0);
4470
4471 return rc;
4472
4473unwind:
4474 for(; rc > 0; rc--)
4475 __free_page(spages[rc-1]);
4476 return -ENOMEM;
4477}
4478
e50a1c2e
BF		 4479struct nfs4_cached_acl {
4480 int cached;
4481 size_t len;
3e9d4154 4482 char data[0];
e50a1c2e
BF		 4483};
4484
4485static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4486{
4487 struct nfs_inode *nfsi = NFS_I(inode);
4488
4489 spin_lock(&inode->i_lock);
4490 kfree(nfsi->nfs4_acl);
4491 nfsi->nfs4_acl = acl;
4492 spin_unlock(&inode->i_lock);
4493}
4494
4495static void nfs4_zap_acl_attr(struct inode *inode)
4496{
4497 nfs4_set_cached_acl(inode, NULL);
4498}
4499
4500static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4501{
4502 struct nfs_inode *nfsi = NFS_I(inode);
4503 struct nfs4_cached_acl *acl;
4504 int ret = -ENOENT;
4505
4506 spin_lock(&inode->i_lock);
4507 acl = nfsi->nfs4_acl;
4508 if (acl == NULL)
4509 goto out;
4510 if (buf == NULL) /* user is just asking for length */
4511 goto out_len;
4512 if (acl->cached == 0)
4513 goto out;
4514 ret = -ERANGE; /* see getxattr(2) man page */
4515 if (acl->len > buflen)
4516 goto out;
4517 memcpy(buf, acl->data, acl->len);
4518out_len:
4519 ret = acl->len;
4520out:
4521 spin_unlock(&inode->i_lock);
4522 return ret;
4523}
4524
5794d21e 4525static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4526{
4527 struct nfs4_cached_acl *acl;
b291f1b1 4528 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4529
1f1ea6c2 4530 if (buflen <= PAGE_SIZE) {
b291f1b1 4531 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4532 if (acl == NULL)
4533 goto out;
4534 acl->cached = 1;
5794d21e 4535 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4536 } else {
4537 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4538 if (acl == NULL)
4539 goto out;
4540 acl->cached = 0;
4541 }
4542 acl->len = acl_len;
4543out:
4544 nfs4_set_cached_acl(inode, acl);
4545}
4546
bf118a34
AA		 4547/*
4548 * The getxattr API returns the required buffer length when called with a
4549 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4550 * the required buf. On a NULL buf, we send a page of data to the server
4551 * guessing that the ACL request can be serviced by a page. If so, we cache
4552 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4553 * the cache. If not so, we throw away the page, and cache the required
4554 * length. The next getxattr call will then produce another round trip to
4555 * the server, this time with the input buf of the required size.
4556 */
16b4289c 4557static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4558{
bf118a34 4559 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4560 struct nfs_getaclargs args = {
4561 .fh = NFS_FH(inode),
4562 .acl_pages = pages,
4563 .acl_len = buflen,
4564 };
663c79b3
BH		 4565 struct nfs_getaclres res = {
4566 .acl_len = buflen,
4567 };
aa1870af
BF		 4568 struct rpc_message msg = {
4569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4570 .rpc_argp = &args,
663c79b3 4571 .rpc_resp = &res,
aa1870af 4572 };
21f498c2
TM		 4573 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4574 int ret = -ENOMEM, i;
aa1870af 4575
bf118a34
AA		 4576 /* As long as we're doing a round trip to the server anyway,
4577 * let's be prepared for a page of acl data. */
4578 if (npages == 0)
4579 npages = 1;
21f498c2
TM		 4580 if (npages > ARRAY_SIZE(pages))
4581 return -ERANGE;
5a006899 4582
bf118a34
AA		 4583 for (i = 0; i < npages; i++) {
4584 pages[i] = alloc_page(GFP_KERNEL);
4585 if (!pages[i])
4586 goto out_free;
e50a1c2e 4587 }
5a006899
SP		 4588
4589 /* for decoding across pages */
4590 res.acl_scratch = alloc_page(GFP_KERNEL);
4591 if (!res.acl_scratch)
4592 goto out_free;
4593
bf118a34
AA		 4594 args.acl_len = npages * PAGE_SIZE;
4595 args.acl_pgbase = 0;
5a006899 4596
de040bec 4597 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4598 __func__, buf, buflen, npages, args.acl_len);
4599 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4600 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4601 if (ret)
4602 goto out_free;
bf118a34 4603
1f1ea6c2
TM		 4604 /* Handle the case where the passed-in buffer is too short */
4605 if (res.acl_flags & NFS4_ACL_TRUNC) {
4606 /* Did the user only issue a request for the acl length? */
4607 if (buf == NULL)
4608 goto out_ok;
e50a1c2e 4609 ret = -ERANGE;
1f1ea6c2 4610 goto out_free;
e50a1c2e 4611 }
1f1ea6c2 4612 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4613 if (buf) {
4614 if (res.acl_len > buflen) {
4615 ret = -ERANGE;
4616 goto out_free;
4617 }
1f1ea6c2 4618 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4619 }
1f1ea6c2
TM		 4620out_ok:
4621 ret = res.acl_len;
e50a1c2e 4622out_free:
bf118a34
AA		 4623 for (i = 0; i < npages; i++)
4624 if (pages[i])
4625 __free_page(pages[i]);
331818f1
TM		 4626 if (res.acl_scratch)
4627 __free_page(res.acl_scratch);
aa1870af
BF		 4628 return ret;
4629}
4630
16b4289c
TM		 4631static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4632{
4633 struct nfs4_exception exception = { };
4634 ssize_t ret;
4635 do {
4636 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4637 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4638 if (ret >= 0)
4639 break;
4640 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4641 } while (exception.retry);
4642 return ret;
4643}
4644
e50a1c2e
BF		 4645static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4646{
4647 struct nfs_server *server = NFS_SERVER(inode);
4648 int ret;
4649
4650 if (!nfs4_server_supports_acls(server))
4651 return -EOPNOTSUPP;
4652 ret = nfs_revalidate_inode(server, inode);
4653 if (ret < 0)
4654 return ret;
08a22b39
AK		 4655 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4656 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4657 ret = nfs4_read_cached_acl(inode, buf, buflen);
4658 if (ret != -ENOENT)
bf118a34
AA		 4659 /* -ENOENT is returned if there is no ACL or if there is an ACL
4660 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4661 return ret;
4662 return nfs4_get_acl_uncached(inode, buf, buflen);
4663}
4664
16b4289c 4665static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4666{
4667 struct nfs_server *server = NFS_SERVER(inode);
4668 struct page *pages[NFS4ACL_MAXPAGES];
4669 struct nfs_setaclargs arg = {
4670 .fh = NFS_FH(inode),
4671 .acl_pages = pages,
4672 .acl_len = buflen,
4673 };
73c403a9 4674 struct nfs_setaclres res;
4b580ee3
BF		 4675 struct rpc_message msg = {
4676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4677 .rpc_argp = &arg,
73c403a9 4678 .rpc_resp = &res,
4b580ee3 4679 };
21f498c2 4680 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4681 int ret, i;
4b580ee3
BF		 4682
4683 if (!nfs4_server_supports_acls(server))
4684 return -EOPNOTSUPP;
21f498c2
TM		 4685 if (npages > ARRAY_SIZE(pages))
4686 return -ERANGE;
e9e3d724
NH		 4687 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4688 if (i < 0)
4689 return i;
57ec14c5 4690 nfs4_inode_return_delegation(inode);
7c513058 4691 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4692
4693 /*
4694 * Free each page after tx, so the only ref left is
4695 * held by the network stack
4696 */
4697 for (; i > 0; i--)
4698 put_page(pages[i-1]);
4699
08a22b39
AK		 4700 /*
4701 * Acl update can result in inode attribute update.
4702 * so mark the attribute cache invalid.
4703 */
4704 spin_lock(&inode->i_lock);
4705 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4706 spin_unlock(&inode->i_lock);
f41f7418
TM		 4707 nfs_access_zap_cache(inode);
4708 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4709 return ret;
4710}
4711
16b4289c
TM		 4712static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4713{
4714 struct nfs4_exception exception = { };
4715 int err;
4716 do {
c1578b76
TM		 4717 err = __nfs4_proc_set_acl(inode, buf, buflen);
4718 trace_nfs4_set_acl(inode, err);
4719 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4720 &exception);
4721 } while (exception.retry);
4722 return err;
4723}
4724
aa9c2669
DQ		 4725#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4726static int _nfs4_get_security_label(struct inode *inode, void *buf,
4727 size_t buflen)
4728{
4729 struct nfs_server *server = NFS_SERVER(inode);
4730 struct nfs_fattr fattr;
4731 struct nfs4_label label = {0, 0, buflen, buf};
4732
4733 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4734 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4735 .fh = NFS_FH(inode),
4736 .bitmask = bitmask,
4737 };
4738 struct nfs4_getattr_res res = {
4739 .fattr = &fattr,
4740 .label = &label,
4741 .server = server,
4742 };
4743 struct rpc_message msg = {
4744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4745 .rpc_argp = &arg,
aa9c2669
DQ		 4746 .rpc_resp = &res,
4747 };
4748 int ret;
4749
4750 nfs_fattr_init(&fattr);
4751
fcb63a9b 4752 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4753 if (ret)
4754 return ret;
4755 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4756 return -ENOENT;
4757 if (buflen < label.len)
4758 return -ERANGE;
4759 return 0;
4760}
4761
4762static int nfs4_get_security_label(struct inode *inode, void *buf,
4763 size_t buflen)
4764{
4765 struct nfs4_exception exception = { };
4766 int err;
4767
4768 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4769 return -EOPNOTSUPP;
4770
4771 do {
c1578b76
TM		 4772 err = _nfs4_get_security_label(inode, buf, buflen);
4773 trace_nfs4_get_security_label(inode, err);
4774 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4775 &exception);
4776 } while (exception.retry);
4777 return err;
4778}
4779
4780static int _nfs4_do_set_security_label(struct inode *inode,
4781 struct nfs4_label *ilabel,
4782 struct nfs_fattr *fattr,
4783 struct nfs4_label *olabel)
4784{
4785
4786 struct iattr sattr = {0};
4787 struct nfs_server *server = NFS_SERVER(inode);
4788 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4789 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4790 .fh = NFS_FH(inode),
4791 .iap = &sattr,
4792 .server = server,
4793 .bitmask = bitmask,
4794 .label = ilabel,
4795 };
4796 struct nfs_setattrres res = {
4797 .fattr = fattr,
4798 .label = olabel,
4799 .server = server,
4800 };
4801 struct rpc_message msg = {
4802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4803 .rpc_argp = &arg,
aa9c2669
DQ		 4804 .rpc_resp = &res,
4805 };
4806 int status;
4807
12207f69 4808 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4809
12207f69 4810 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4811 if (status)
4812 dprintk("%s failed: %d\n", __func__, status);
4813
4814 return status;
4815}
4816
4817static int nfs4_do_set_security_label(struct inode *inode,
4818 struct nfs4_label *ilabel,
4819 struct nfs_fattr *fattr,
4820 struct nfs4_label *olabel)
4821{
4822 struct nfs4_exception exception = { };
4823 int err;
4824
4825 do {
c1578b76
TM		 4826 err = _nfs4_do_set_security_label(inode, ilabel,
4827 fattr, olabel);
4828 trace_nfs4_set_security_label(inode, err);
4829 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4830 &exception);
4831 } while (exception.retry);
4832 return err;
4833}
4834
4835static int
4836nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4837{
4838 struct nfs4_label ilabel, *olabel = NULL;
4839 struct nfs_fattr fattr;
4840 struct rpc_cred *cred;
2b0143b5 4841 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4842 int status;
4843
4844 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4845 return -EOPNOTSUPP;
4846
4847 nfs_fattr_init(&fattr);
4848
4849 ilabel.pi = 0;
4850 ilabel.lfs = 0;
4851 ilabel.label = (char *)buf;
4852 ilabel.len = buflen;
4853
4854 cred = rpc_lookup_cred();
4855 if (IS_ERR(cred))
4856 return PTR_ERR(cred);
4857
4858 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4859 if (IS_ERR(olabel)) {
4860 status = -PTR_ERR(olabel);
4861 goto out;
4862 }
4863
4864 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4865 if (status == 0)
4866 nfs_setsecurity(inode, &fattr, olabel);
4867
4868 nfs4_label_free(olabel);
4869out:
4870 put_rpccred(cred);
4871 return status;
4872}
4873#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4874
4875
1da177e4 4876static int
8478eaa1
N		 4877nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4878 struct nfs4_state *state, long *timeout)
1da177e4 4879{
aa5190d0
TM		 4880 struct nfs_client *clp = server->nfs_client;
4881
4882 if (task->tk_status >= 0)
1da177e4
LT		 4883 return 0;
4884 switch(task->tk_status) {
a1d0b5ee 4885 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4886 case -NFS4ERR_ADMIN_REVOKED:
4887 case -NFS4ERR_BAD_STATEID:
4888 case -NFS4ERR_OPENMODE:
4889 if (state == NULL)
4890 break;
5d422301 4891 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4892 goto recovery_failed;
0400a6b0 4893 goto wait_on_recovery;
0ced63d1 4894 case -NFS4ERR_EXPIRED:
5d422301
TM		 4895 if (state != NULL) {
4896 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4897 goto recovery_failed;
5d422301 4898 }
1da177e4 4899 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4900 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4901 nfs4_schedule_lease_recovery(clp);
4902 goto wait_on_recovery;
519ae255
CL		 4903 case -NFS4ERR_MOVED:
4904 if (nfs4_schedule_migration_recovery(server) < 0)
4905 goto recovery_failed;
4906 goto wait_on_recovery;
8ef2f8d4
CL		 4907 case -NFS4ERR_LEASE_MOVED:
4908 nfs4_schedule_lease_moved_recovery(clp);
4909 goto wait_on_recovery;
4745e315
AA		 4910#if defined(CONFIG_NFS_V4_1)
4911 case -NFS4ERR_BADSESSION:
4912 case -NFS4ERR_BADSLOT:
4913 case -NFS4ERR_BAD_HIGH_SLOT:
4914 case -NFS4ERR_DEADSESSION:
4915 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4916 case -NFS4ERR_SEQ_FALSE_RETRY:
4917 case -NFS4ERR_SEQ_MISORDERED:
4918 dprintk("%s ERROR %d, Reset session\n", __func__,
4919 task->tk_status);
9f594791 4920 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4921 goto wait_on_recovery;
4745e315 4922#endif /* CONFIG_NFS_V4_1 */
1da177e4 4923 case -NFS4ERR_DELAY:
aa5190d0 4924 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4925 rpc_delay(task, nfs4_update_delay(timeout));
4926 goto restart_call;
006ea73e 4927 case -NFS4ERR_GRACE:
1da177e4 4928 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4929 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4930 case -NFS4ERR_OLD_STATEID:
f1478c13 4931 goto restart_call;
1da177e4
LT		 4932 }
4933 task->tk_status = nfs4_map_errors(task->tk_status);
4934 return 0;
9f51a78e 4935recovery_failed:
5d422301
TM		 4936 task->tk_status = -EIO;
4937 return 0;
0400a6b0 4938wait_on_recovery:
a2c0b9e2 4939 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4940 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4941 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4942 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4943 goto recovery_failed;
f1478c13 4944restart_call:
a2c0b9e2
TM		 4945 task->tk_status = 0;
4946 return -EAGAIN;
1da177e4
LT		 4947}
4948
f092075d
CL		 4949static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4950 nfs4_verifier *bootverf)
cd93710e
CL		 4951{
4952 __be32 verf[2];
4953
2c820d9a
CL		 4954 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4955 /* An impossible timestamp guarantees this value
4956 * will never match a generated boot time. */
4957 verf[0] = 0;
17f26b12 4958 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4959 } else {
f092075d 4960 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4961 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4962 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4963 }
cd93710e
CL		 4964 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4965}
4966
a3192688
JL		 4967static int
4968nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4969{
a3192688
JL		 4970 int result;
4971 size_t len;
4972 char *str;
4973 bool retried = false;
e984a55a 4974
ceb3a16c 4975 if (clp->cl_owner_id != NULL)
a3192688
JL		 4976 return 0;
4977retry:
4978 rcu_read_lock();
4979 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4980 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4981 1 +
4982 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4983 1;
4984 rcu_read_unlock();
4985
4986 if (len > NFS4_OPAQUE_LIMIT + 1)
4987 return -EINVAL;
4988
4989 /*
4990 * Since this string is allocated at mount time, and held until the
4991 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4992 * about a memory-reclaim deadlock.
4993 */
4994 str = kmalloc(len, GFP_KERNEL);
4995 if (!str)
4996 return -ENOMEM;
ceb3a16c 4997
e984a55a 4998 rcu_read_lock();
a3192688
JL		 4999 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5000 clp->cl_ipaddr,
5001 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5002 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5003 rcu_read_unlock();
a3192688
JL		 5004
5005 /* Did something change? */
5006 if (result >= len) {
5007 kfree(str);
5008 if (retried)
5009 return -EINVAL;
5010 retried = true;
5011 goto retry;
5012 }
5013 clp->cl_owner_id = str;
5014 return 0;
e984a55a
CL		 5015}
5016
873e3851
JL		 5017static int
5018nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5019{
5020 int result;
5021 size_t len;
5022 char *str;
5023
5024 len = 10 + 10 + 1 + 10 + 1 +
5025 strlen(nfs4_client_id_uniquifier) + 1 +
5026 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5027
5028 if (len > NFS4_OPAQUE_LIMIT + 1)
5029 return -EINVAL;
5030
5031 /*
5032 * Since this string is allocated at mount time, and held until the
5033 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5034 * about a memory-reclaim deadlock.
5035 */
5036 str = kmalloc(len, GFP_KERNEL);
5037 if (!str)
5038 return -ENOMEM;
5039
5040 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5041 clp->rpc_ops->version, clp->cl_minorversion,
5042 nfs4_client_id_uniquifier,
5043 clp->cl_rpcclient->cl_nodename);
5044 if (result >= len) {
5045 kfree(str);
5046 return -EINVAL;
5047 }
5048 clp->cl_owner_id = str;
5049 return 0;
5050}
5051
5052static int
5053nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5054{
873e3851
JL		 5055 int result;
5056 size_t len;
5057 char *str;
ceb3a16c
TM		 5058
5059 if (clp->cl_owner_id != NULL)
873e3851 5060 return 0;
6f2ea7f2
CL		 5061
5062 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5063 return nfs4_init_uniquifier_client_string(clp);
5064
5065 len = 10 + 10 + 1 + 10 + 1 +
5066 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5067
5068 if (len > NFS4_OPAQUE_LIMIT + 1)
5069 return -EINVAL;
5070
5071 /*
5072 * Since this string is allocated at mount time, and held until the
5073 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5074 * about a memory-reclaim deadlock.
5075 */
5076 str = kmalloc(len, GFP_KERNEL);
5077 if (!str)
5078 return -ENOMEM;
5079
5080 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5081 clp->rpc_ops->version, clp->cl_minorversion,
5082 clp->cl_rpcclient->cl_nodename);
5083 if (result >= len) {
5084 kfree(str);
5085 return -EINVAL;
5086 }
5087 clp->cl_owner_id = str;
5088 return 0;
e984a55a
CL		 5089}
5090
706cb8db
CL		 5091/*
5092 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5093 * services. Advertise one based on the address family of the
5094 * clientaddr.
5095 */
5096static unsigned int
5097nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5098{
5099 if (strchr(clp->cl_ipaddr, ':') != NULL)
5100 return scnprintf(buf, len, "tcp6");
5101 else
5102 return scnprintf(buf, len, "tcp");
5103}
5104
f11b2a1c
JL		 5105static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5106{
5107 struct nfs4_setclientid *sc = calldata;
5108
5109 if (task->tk_status == 0)
5110 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5111}
5112
5113static const struct rpc_call_ops nfs4_setclientid_ops = {
5114 .rpc_call_done = nfs4_setclientid_done,
5115};
5116
6bbb4ae8
CL		 5117/**
5118 * nfs4_proc_setclientid - Negotiate client ID
5119 * @clp: state data structure
5120 * @program: RPC program for NFSv4 callback service
5121 * @port: IP port number for NFS4 callback service
5122 * @cred: RPC credential to use for this call
5123 * @res: where to place the result
5124 *
5125 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5126 */
bb8b27e5
TM		 5127int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5128 unsigned short port, struct rpc_cred *cred,
5129 struct nfs4_setclientid_res *res)
1da177e4
LT		 5130{
5131 nfs4_verifier sc_verifier;
5132 struct nfs4_setclientid setclientid = {
5133 .sc_verifier = &sc_verifier,
5134 .sc_prog = program,
3a6bb738 5135 .sc_clnt = clp,
1da177e4
LT		 5136 };
5137 struct rpc_message msg = {
5138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5139 .rpc_argp = &setclientid,
bb8b27e5 5140 .rpc_resp = res,
286d7d6a 5141 .rpc_cred = cred,
1da177e4 5142 };
f11b2a1c
JL		 5143 struct rpc_task *task;
5144 struct rpc_task_setup task_setup_data = {
5145 .rpc_client = clp->cl_rpcclient,
5146 .rpc_message = &msg,
5147 .callback_ops = &nfs4_setclientid_ops,
5148 .callback_data = &setclientid,
5149 .flags = RPC_TASK_TIMEOUT,
5150 };
6bbb4ae8 5151 int status;
1da177e4 5152
de734831 5153 /* nfs_client_id4 */
f092075d 5154 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5155
5156 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5157 status = nfs4_init_uniform_client_string(clp);
5158 else
a3192688 5159 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5160
5161 if (status)
5162 goto out;
3a6bb738 5163
de734831 5164 /* cb_client4 */
706cb8db
CL		 5165 setclientid.sc_netid_len =
5166 nfs4_init_callback_netid(clp,
5167 setclientid.sc_netid,
5168 sizeof(setclientid.sc_netid));
de734831 5169 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5170 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5171 clp->cl_ipaddr, port >> 8, port & 255);
5172
3a6bb738 5173 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5174 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5175 clp->cl_owner_id);
f11b2a1c
JL		 5176 task = rpc_run_task(&task_setup_data);
5177 if (IS_ERR(task)) {
5178 status = PTR_ERR(task);
5179 goto out;
5180 }
5181 status = task->tk_status;
5182 if (setclientid.sc_cred) {
5183 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5184 put_rpccred(setclientid.sc_cred);
5185 }
5186 rpc_put_task(task);
5187out:
c6d01c6f 5188 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5189 dprintk("NFS reply setclientid: %d\n", status);
5190 return status;
1da177e4
LT		 5191}
5192
6bbb4ae8
CL		 5193/**
5194 * nfs4_proc_setclientid_confirm - Confirm client ID
5195 * @clp: state data structure
5196 * @res: result of a previous SETCLIENTID
5197 * @cred: RPC credential to use for this call
5198 *
5199 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5200 */
fd954ae1 5201int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5202 struct nfs4_setclientid_res *arg,
5203 struct rpc_cred *cred)
1da177e4 5204{
1da177e4
LT		 5205 struct rpc_message msg = {
5206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5207 .rpc_argp = arg,
286d7d6a 5208 .rpc_cred = cred,
1da177e4 5209 };
1da177e4
LT		 5210 int status;
5211
6bbb4ae8
CL		 5212 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5213 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5214 clp->cl_clientid);
1bd714f2 5215 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5216 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5217 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5218 return status;
5219}
5220
fe650407
TM		 5221struct nfs4_delegreturndata {
5222 struct nfs4_delegreturnargs args;
fa178f29 5223 struct nfs4_delegreturnres res;
fe650407
TM		 5224 struct nfs_fh fh;
5225 nfs4_stateid stateid;
26e976a8 5226 unsigned long timestamp;
fa178f29 5227 struct nfs_fattr fattr;
fe650407 5228 int rpc_status;
039b756a
PT		 5229 struct inode *inode;
5230 bool roc;
5231 u32 roc_barrier;
fe650407
TM		 5232};
5233
fe650407
TM		 5234static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5235{
5236 struct nfs4_delegreturndata *data = calldata;
938e1010 5237
14516c3a
TM		 5238 if (!nfs4_sequence_done(task, &data->res.seq_res))
5239 return;
938e1010 5240
ca8acf8d 5241 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5242 switch (task->tk_status) {
79708861 5243 case 0:
fa178f29 5244 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5245 case -NFS4ERR_ADMIN_REVOKED:
5246 case -NFS4ERR_DELEG_REVOKED:
5247 case -NFS4ERR_BAD_STATEID:
5248 case -NFS4ERR_OLD_STATEID:
5249 case -NFS4ERR_STALE_STATEID:
5250 case -NFS4ERR_EXPIRED:
5251 task->tk_status = 0;
039b756a
PT		 5252 if (data->roc)
5253 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5254 break;
79708861 5255 default:
8478eaa1
N		 5256 if (nfs4_async_handle_error(task, data->res.server,
5257 NULL, NULL) == -EAGAIN) {
d00c5d43 5258 rpc_restart_call_prepare(task);
79708861
RL		 5259 return;
5260 }
5261 }
5262 data->rpc_status = task->tk_status;
fe650407
TM		 5263}
5264
5265static void nfs4_delegreturn_release(void *calldata)
5266{
039b756a 5267 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5268 struct inode *inode = data->inode;
039b756a 5269
ea7c38fe
TM		 5270 if (inode) {
5271 if (data->roc)
5272 pnfs_roc_release(inode);
5273 nfs_iput_and_deactive(inode);
5274 }
fe650407
TM		 5275 kfree(calldata);
5276}
5277
938e1010
AA		 5278static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5279{
5280 struct nfs4_delegreturndata *d_data;
5281
5282 d_data = (struct nfs4_delegreturndata *)data;
5283
039b756a
PT		 5284 if (d_data->roc &&
5285 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5286 return;
5287
d9afbd1b
TM		 5288 nfs4_setup_sequence(d_data->res.server,
5289 &d_data->args.seq_args,
5290 &d_data->res.seq_res,
5291 task);
938e1010 5292}
938e1010 5293
c8d149f3 5294static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5295 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5296 .rpc_call_done = nfs4_delegreturn_done,
5297 .rpc_release = nfs4_delegreturn_release,
5298};
5299
e6f81075 5300static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5301{
5302 struct nfs4_delegreturndata *data;
fa178f29 5303 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5304 struct rpc_task *task;
5138fde0
TM		 5305 struct rpc_message msg = {
5306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5307 .rpc_cred = cred,
5308 };
c970aa85
TM		 5309 struct rpc_task_setup task_setup_data = {
5310 .rpc_client = server->client,
5138fde0 5311 .rpc_message = &msg,
c970aa85
TM		 5312 .callback_ops = &nfs4_delegreturn_ops,
5313 .flags = RPC_TASK_ASYNC,
5314 };
e6f81075 5315 int status = 0;
fe650407 5316
8535b2be 5317 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5318 if (data == NULL)
5319 return -ENOMEM;
a9c92d6b 5320 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5321 data->args.fhandle = &data->fh;
5322 data->args.stateid = &data->stateid;
9e907fec 5323 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5324 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5325 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5326 data->res.fattr = &data->fattr;
5327 data->res.server = server;
5138fde0 5328 nfs_fattr_init(data->res.fattr);
26e976a8 5329 data->timestamp = jiffies;
fe650407 5330 data->rpc_status = 0;
ea7c38fe
TM		 5331 data->inode = nfs_igrab_and_active(inode);
5332 if (data->inode)
5333 data->roc = nfs4_roc(inode);
fe650407 5334
c970aa85 5335 task_setup_data.callback_data = data;
1174dd1f
TM		 5336 msg.rpc_argp = &data->args;
5337 msg.rpc_resp = &data->res;
c970aa85 5338 task = rpc_run_task(&task_setup_data);
7a1218a2 5339 if (IS_ERR(task))
fe650407 5340 return PTR_ERR(task);
e6f81075
TM		 5341 if (!issync)
5342 goto out;
fe650407 5343 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5344 if (status != 0)
5345 goto out;
5346 status = data->rpc_status;
e144cbcc
TM		 5347 if (status == 0)
5348 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5349 else
5350 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5351out:
e6b3c4db 5352 rpc_put_task(task);
fe650407 5353 return status;
1da177e4
LT		 5354}
5355
e6f81075 5356int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5357{
5358 struct nfs_server *server = NFS_SERVER(inode);
5359 struct nfs4_exception exception = { };
5360 int err;
5361 do {
e6f81075 5362 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5363 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5364 switch (err) {
5365 case -NFS4ERR_STALE_STATEID:
5366 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5367 case 0:
5368 return 0;
5369 }
5370 err = nfs4_handle_exception(server, err, &exception);
5371 } while (exception.retry);
5372 return err;
5373}
5374
5375#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5376#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5377
5378/*
5379 * sleep, with exponential backoff, and retry the LOCK operation.
5380 */
5381static unsigned long
5382nfs4_set_lock_task_retry(unsigned long timeout)
5383{
416ad3c9 5384 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5385 timeout <<= 1;
5386 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5387 return NFS4_LOCK_MAXTIMEOUT;
5388 return timeout;
5389}
5390
1da177e4
LT		 5391static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5392{
5393 struct inode *inode = state->inode;
5394 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5395 struct nfs_client *clp = server->nfs_client;
911d1aaf 5396 struct nfs_lockt_args arg = {
1da177e4 5397 .fh = NFS_FH(inode),
911d1aaf 5398 .fl = request,
1da177e4 5399 };
911d1aaf
TM		 5400 struct nfs_lockt_res res = {
5401 .denied = request,
1da177e4
LT		 5402 };
5403 struct rpc_message msg = {
5404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5405 .rpc_argp = &arg,
5406 .rpc_resp = &res,
5407 .rpc_cred = state->owner->so_cred,
5408 };
1da177e4
LT		 5409 struct nfs4_lock_state *lsp;
5410 int status;
5411
911d1aaf 5412 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5413 status = nfs4_set_lock_state(state, request);
5414 if (status != 0)
5415 goto out;
5416 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5417 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5418 arg.lock_owner.s_dev = server->s_dev;
7c513058 5419 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5420 switch (status) {
5421 case 0:
5422 request->fl_type = F_UNLCK;
5423 break;
5424 case -NFS4ERR_DENIED:
5425 status = 0;
1da177e4 5426 }
70cc6487 5427 request->fl_ops->fl_release_private(request);
a6f951dd 5428 request->fl_ops = NULL;
8d0a8a9d 5429out:
1da177e4
LT		 5430 return status;
5431}
5432
5433static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5434{
5435 struct nfs4_exception exception = { };
5436 int err;
5437
5438 do {
d1b748a5
TM		 5439 err = _nfs4_proc_getlk(state, cmd, request);
5440 trace_nfs4_get_lock(request, state, cmd, err);
5441 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5442 &exception);
5443 } while (exception.retry);
5444 return err;
5445}
5446
5447static int do_vfs_lock(struct file *file, struct file_lock *fl)
5448{
5449 int res = 0;
5450 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5451 case FL_POSIX:
5452 res = posix_lock_file_wait(file, fl);
5453 break;
5454 case FL_FLOCK:
5455 res = flock_lock_file_wait(file, fl);
5456 break;
5457 default:
5458 BUG();
5459 }
1da177e4
LT		 5460 return res;
5461}
5462
faf5f49c 5463struct nfs4_unlockdata {
911d1aaf
TM		 5464 struct nfs_locku_args arg;
5465 struct nfs_locku_res res;
faf5f49c
TM		 5466 struct nfs4_lock_state *lsp;
5467 struct nfs_open_context *ctx;
911d1aaf
TM		 5468 struct file_lock fl;
5469 const struct nfs_server *server;
26e976a8 5470 unsigned long timestamp;
faf5f49c
TM		 5471};
5472
911d1aaf
TM		 5473static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5474 struct nfs_open_context *ctx,
5475 struct nfs4_lock_state *lsp,
5476 struct nfs_seqid *seqid)
5477{
5478 struct nfs4_unlockdata *p;
5479 struct inode *inode = lsp->ls_state->inode;
5480
8535b2be 5481 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5482 if (p == NULL)
5483 return NULL;
5484 p->arg.fh = NFS_FH(inode);
5485 p->arg.fl = &p->fl;
5486 p->arg.seqid = seqid;
c1d51931 5487 p->res.seqid = seqid;
911d1aaf
TM		 5488 p->lsp = lsp;
5489 atomic_inc(&lsp->ls_count);
5490 /* Ensure we don't close file until we're done freeing locks! */
5491 p->ctx = get_nfs_open_context(ctx);
db2efec0 5492 get_file(fl->fl_file);
911d1aaf
TM		 5493 memcpy(&p->fl, fl, sizeof(p->fl));
5494 p->server = NFS_SERVER(inode);
5495 return p;
5496}
5497
06f814a3 5498static void nfs4_locku_release_calldata(void *data)
faf5f49c 5499{
963d8fe5 5500 struct nfs4_unlockdata *calldata = data;
911d1aaf 5501 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5502 nfs4_put_lock_state(calldata->lsp);
5503 put_nfs_open_context(calldata->ctx);
db2efec0 5504 fput(calldata->fl.fl_file);
06f814a3 5505 kfree(calldata);
faf5f49c
TM		 5506}
5507
963d8fe5 5508static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5509{
963d8fe5 5510 struct nfs4_unlockdata *calldata = data;
faf5f49c 5511
14516c3a
TM		 5512 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5513 return;
faf5f49c
TM		 5514 switch (task->tk_status) {
5515 case 0:
26e976a8 5516 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5517 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5518 if (nfs4_update_lock_stateid(calldata->lsp,
5519 &calldata->res.stateid))
5520 break;
9e33bed5
TM		 5521 case -NFS4ERR_BAD_STATEID:
5522 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5523 case -NFS4ERR_STALE_STATEID:
5524 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5525 if (!nfs4_stateid_match(&calldata->arg.stateid,
5526 &calldata->lsp->ls_stateid))
5527 rpc_restart_call_prepare(task);
faf5f49c
TM		 5528 break;
5529 default:
8478eaa1
N		 5530 if (nfs4_async_handle_error(task, calldata->server,
5531 NULL, NULL) == -EAGAIN)
d00c5d43 5532 rpc_restart_call_prepare(task);
faf5f49c 5533 }
2b1bc308 5534 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5535}
5536
4ce70ada 5537static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5538{
4ce70ada 5539 struct nfs4_unlockdata *calldata = data;
faf5f49c 5540
911d1aaf 5541 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5542 goto out_wait;
425c1d4e 5543 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5544 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5545 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5546 goto out_no_action;
faf5f49c 5547 }
26e976a8 5548 calldata->timestamp = jiffies;
035168ab 5549 if (nfs4_setup_sequence(calldata->server,
a893693c 5550 &calldata->arg.seq_args,
2240a9e2
TM		 5551 &calldata->res.seq_res,
5552 task) != 0)
5553 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5554 return;
5555out_no_action:
5556 task->tk_action = NULL;
5557out_wait:
5558 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5559}
5560
963d8fe5 5561static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5562 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5563 .rpc_call_done = nfs4_locku_done,
06f814a3 5564 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5565};
5566
a5d16a4d
TM		 5567static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5568 struct nfs_open_context *ctx,
5569 struct nfs4_lock_state *lsp,
5570 struct nfs_seqid *seqid)
5571{
5572 struct nfs4_unlockdata *data;
5138fde0
TM		 5573 struct rpc_message msg = {
5574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5575 .rpc_cred = ctx->cred,
5576 };
c970aa85
TM		 5577 struct rpc_task_setup task_setup_data = {
5578 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5579 .rpc_message = &msg,
c970aa85 5580 .callback_ops = &nfs4_locku_ops,
101070ca 5581 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5582 .flags = RPC_TASK_ASYNC,
5583 };
a5d16a4d 5584
fa940720
WAA		 5585 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5586 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5587
137d6aca
FF		 5588 /* Ensure this is an unlock - when canceling a lock, the
5589 * canceled lock is passed in, and it won't be an unlock.
5590 */
5591 fl->fl_type = F_UNLCK;
5592
a5d16a4d
TM		 5593 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5594 if (data == NULL) {
5595 nfs_free_seqid(seqid);
5596 return ERR_PTR(-ENOMEM);
5597 }
5598
a9c92d6b 5599 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5600 msg.rpc_argp = &data->arg;
5601 msg.rpc_resp = &data->res;
c970aa85
TM		 5602 task_setup_data.callback_data = data;
5603 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5604}
5605
faf5f49c
TM		 5606static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5607{
65b62a29
TM		 5608 struct inode *inode = state->inode;
5609 struct nfs4_state_owner *sp = state->owner;
5610 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5611 struct nfs_seqid *seqid;
1da177e4 5612 struct nfs4_lock_state *lsp;
06f814a3 5613 struct rpc_task *task;
b4019c0e 5614 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5615 int status = 0;
536ff0f8 5616 unsigned char fl_flags = request->fl_flags;
faf5f49c 5617
8d0a8a9d 5618 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5619 /* Unlock _before_ we do the RPC call */
5620 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5621 /* Exclude nfs_delegation_claim_locks() */
5622 mutex_lock(&sp->so_delegreturn_mutex);
5623 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5624 down_read(&nfsi->rwsem);
5625 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5626 up_read(&nfsi->rwsem);
65b62a29 5627 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5628 goto out;
19e03c57
TM		 5629 }
5630 up_read(&nfsi->rwsem);
65b62a29 5631 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5632 if (status != 0)
9b073574
TM		 5633 goto out;
5634 /* Is this a delegated lock? */
8d0a8a9d 5635 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5636 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5637 goto out;
b4019c0e
TM		 5638 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5639 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5640 status = -ENOMEM;
badc76dd 5641 if (IS_ERR(seqid))
9b073574 5642 goto out;
cd3758e3 5643 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5644 status = PTR_ERR(task);
5645 if (IS_ERR(task))
9b073574 5646 goto out;
a5d16a4d 5647 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5648 rpc_put_task(task);
9b073574 5649out:
536ff0f8 5650 request->fl_flags = fl_flags;
d1b748a5 5651 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5652 return status;
5653}
5654
a5d16a4d
TM		 5655struct nfs4_lockdata {
5656 struct nfs_lock_args arg;
5657 struct nfs_lock_res res;
5658 struct nfs4_lock_state *lsp;
5659 struct nfs_open_context *ctx;
5660 struct file_lock fl;
26e976a8 5661 unsigned long timestamp;
a5d16a4d
TM		 5662 int rpc_status;
5663 int cancelled;
66179efe 5664 struct nfs_server *server;
a5d16a4d
TM		 5665};
5666
5667static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5668 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5669 gfp_t gfp_mask)
1da177e4 5670{
a5d16a4d
TM		 5671 struct nfs4_lockdata *p;
5672 struct inode *inode = lsp->ls_state->inode;
1da177e4 5673 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5674 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5675
8535b2be 5676 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5677 if (p == NULL)
5678 return NULL;
5679
5680 p->arg.fh = NFS_FH(inode);
5681 p->arg.fl = &p->fl;
8535b2be 5682 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5683 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5684 goto out_free;
b4019c0e
TM		 5685 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5686 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5687 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5688 goto out_free_seqid;
7539bbab 5689 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5690 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5691 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5692 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5693 p->lsp = lsp;
66179efe 5694 p->server = server;
a5d16a4d
TM		 5695 atomic_inc(&lsp->ls_count);
5696 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5697 get_file(fl->fl_file);
a5d16a4d
TM		 5698 memcpy(&p->fl, fl, sizeof(p->fl));
5699 return p;
2f74c0a0
TM		 5700out_free_seqid:
5701 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5702out_free:
5703 kfree(p);
5704 return NULL;
5705}
5706
5707static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5708{
5709 struct nfs4_lockdata *data = calldata;
5710 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5711
3110ff80 5712 dprintk("%s: begin!\n", __func__);
2f74c0a0 5713 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5714 goto out_wait;
a5d16a4d 5715 /* Do we need to do an open_to_lock_owner? */
6b447539 5716 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5717 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5718 goto out_release_lock_seqid;
8fe72bac 5719 }
425c1d4e
TM		 5720 nfs4_stateid_copy(&data->arg.open_stateid,
5721 &state->open_stateid);
a5d16a4d 5722 data->arg.new_lock_owner = 1;
c1d51931 5723 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5724 } else {
2f74c0a0 5725 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5726 nfs4_stateid_copy(&data->arg.lock_stateid,
5727 &data->lsp->ls_stateid);
5728 }
5d422301
TM		 5729 if (!nfs4_valid_open_stateid(state)) {
5730 data->rpc_status = -EBADF;
5731 task->tk_action = NULL;
5732 goto out_release_open_seqid;
5733 }
26e976a8 5734 data->timestamp = jiffies;
035168ab
TM		 5735 if (nfs4_setup_sequence(data->server,
5736 &data->arg.seq_args,
2240a9e2 5737 &data->res.seq_res,
d9afbd1b 5738 task) == 0)
66179efe 5739 return;
5d422301 5740out_release_open_seqid:
2240a9e2
TM		 5741 nfs_release_seqid(data->arg.open_seqid);
5742out_release_lock_seqid:
5743 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5744out_wait:
5745 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5746 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5747}
5748
a5d16a4d
TM		 5749static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5750{
5751 struct nfs4_lockdata *data = calldata;
39071e6f 5752 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5753
3110ff80 5754 dprintk("%s: begin!\n", __func__);
a5d16a4d 5755
14516c3a
TM		 5756 if (!nfs4_sequence_done(task, &data->res.seq_res))
5757 return;
66179efe 5758
a5d16a4d 5759 data->rpc_status = task->tk_status;
425c1d4e
TM		 5760 switch (task->tk_status) {
5761 case 0:
2b0143b5 5762 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5763 data->timestamp);
c69899a1
TM		 5764 if (data->arg.new_lock) {
5765 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5766 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5767 rpc_restart_call_prepare(task);
5768 break;
5769 }
5770 }
39071e6f
TM		 5771 if (data->arg.new_lock_owner != 0) {
5772 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5773 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5774 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5775 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5776 rpc_restart_call_prepare(task);
425c1d4e
TM		 5777 break;
5778 case -NFS4ERR_BAD_STATEID:
5779 case -NFS4ERR_OLD_STATEID:
5780 case -NFS4ERR_STALE_STATEID:
5781 case -NFS4ERR_EXPIRED:
5782 if (data->arg.new_lock_owner != 0) {
5783 if (!nfs4_stateid_match(&data->arg.open_stateid,
5784 &lsp->ls_state->open_stateid))
5785 rpc_restart_call_prepare(task);
5786 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5787 &lsp->ls_stateid))
5788 rpc_restart_call_prepare(task);
a5d16a4d 5789 }
3110ff80 5790 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5791}
5792
5793static void nfs4_lock_release(void *calldata)
5794{
5795 struct nfs4_lockdata *data = calldata;
5796
3110ff80 5797 dprintk("%s: begin!\n", __func__);
2f74c0a0 5798 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5799 if (data->cancelled != 0) {
5800 struct rpc_task *task;
5801 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5802 data->arg.lock_seqid);
5803 if (!IS_ERR(task))
bf294b41 5804 rpc_put_task_async(task);
3110ff80 5805 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5806 } else
5807 nfs_free_seqid(data->arg.lock_seqid);
5808 nfs4_put_lock_state(data->lsp);
5809 put_nfs_open_context(data->ctx);
feaff8e5 5810 fput(data->fl.fl_file);
a5d16a4d 5811 kfree(data);
3110ff80 5812 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5813}
5814
5815static const struct rpc_call_ops nfs4_lock_ops = {
5816 .rpc_call_prepare = nfs4_lock_prepare,
5817 .rpc_call_done = nfs4_lock_done,
5818 .rpc_release = nfs4_lock_release,
5819};
5820
2bee72a6
TM		 5821static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5822{
2bee72a6
TM		 5823 switch (error) {
5824 case -NFS4ERR_ADMIN_REVOKED:
5825 case -NFS4ERR_BAD_STATEID:
ecac799a 5826 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5827 if (new_lock_owner != 0 ||
795a88c9 5828 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5829 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5830 break;
5831 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5832 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5833 case -NFS4ERR_EXPIRED:
5834 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5835 };
5836}
5837
afe6c27c 5838static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5839{
5840 struct nfs4_lockdata *data;
5841 struct rpc_task *task;
5138fde0
TM		 5842 struct rpc_message msg = {
5843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5844 .rpc_cred = state->owner->so_cred,
5845 };
c970aa85
TM		 5846 struct rpc_task_setup task_setup_data = {
5847 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5848 .rpc_message = &msg,
c970aa85 5849 .callback_ops = &nfs4_lock_ops,
101070ca 5850 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5851 .flags = RPC_TASK_ASYNC,
5852 };
a5d16a4d
TM		 5853 int ret;
5854
3110ff80 5855 dprintk("%s: begin!\n", __func__);
cd3758e3 5856 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5857 fl->fl_u.nfs4_fl.owner,
5858 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5859 if (data == NULL)
5860 return -ENOMEM;
5861 if (IS_SETLKW(cmd))
5862 data->arg.block = 1;
a9c92d6b 5863 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5864 msg.rpc_argp = &data->arg;
5865 msg.rpc_resp = &data->res;
c970aa85 5866 task_setup_data.callback_data = data;
8fe72bac
TM		 5867 if (recovery_type > NFS_LOCK_NEW) {
5868 if (recovery_type == NFS_LOCK_RECLAIM)
5869 data->arg.reclaim = NFS_LOCK_RECLAIM;
5870 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5871 } else
5872 data->arg.new_lock = 1;
c970aa85 5873 task = rpc_run_task(&task_setup_data);
7a1218a2 5874 if (IS_ERR(task))
a5d16a4d 5875 return PTR_ERR(task);
a5d16a4d
TM		 5876 ret = nfs4_wait_for_completion_rpc_task(task);
5877 if (ret == 0) {
5878 ret = data->rpc_status;
2bee72a6
TM		 5879 if (ret)
5880 nfs4_handle_setlk_error(data->server, data->lsp,
5881 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5882 } else
5883 data->cancelled = 1;
e6b3c4db 5884 rpc_put_task(task);
3110ff80 5885 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5886 return ret;
1da177e4
LT		 5887}
5888
5889static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5890{
202b50dc 5891 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5892 struct nfs4_exception exception = {
5893 .inode = state->inode,
5894 };
202b50dc
TM		 5895 int err;
5896
5897 do {
42a2d13e
TM		 5898 /* Cache the lock if possible... */
5899 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5900 return 0;
afe6c27c 5901 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5902 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5903 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5904 break;
5905 nfs4_handle_exception(server, err, &exception);
5906 } while (exception.retry);
5907 return err;
1da177e4
LT		 5908}
5909
5910static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5911{
202b50dc 5912 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5913 struct nfs4_exception exception = {
5914 .inode = state->inode,
5915 };
202b50dc
TM		 5916 int err;
5917
6bfc93ef
TM		 5918 err = nfs4_set_lock_state(state, request);
5919 if (err != 0)
5920 return err;
f6de7a39 5921 if (!recover_lost_locks) {
ef1820f9
N		 5922 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5923 return 0;
5924 }
202b50dc 5925 do {
42a2d13e
TM		 5926 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5927 return 0;
afe6c27c 5928 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5929 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5930 switch (err) {
5931 default:
5932 goto out;
5933 case -NFS4ERR_GRACE:
5934 case -NFS4ERR_DELAY:
5935 nfs4_handle_exception(server, err, &exception);
5936 err = 0;
5937 }
202b50dc 5938 } while (exception.retry);
a9ed2e25 5939out:
202b50dc 5940 return err;
1da177e4
LT		 5941}
5942
f062eb6c 5943#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5944/**
5945 * nfs41_check_expired_locks - possibly free a lock stateid
5946 *
5947 * @state: NFSv4 state for an inode
5948 *
5949 * Returns NFS_OK if recovery for this stateid is now finished.
5950 * Otherwise a negative NFS4ERR value is returned.
5951 */
b01dd1d8 5952static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5953{
eb64cf96 5954 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5955 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5956 struct nfs_server *server = NFS_SERVER(state->inode);
5957
b01dd1d8 5958 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5959 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5960 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5961
5962 status = nfs41_test_stateid(server,
5963 &lsp->ls_stateid,
5964 cred);
08cb47fa 5965 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5966 if (status != NFS_OK) {
3e60ffdd
CL		 5967 /* Free the stateid unless the server
5968 * informs us the stateid is unrecognized. */
89af2739
CL		 5969 if (status != -NFS4ERR_BAD_STATEID)
5970 nfs41_free_stateid(server,
ab7cb0df
TM		 5971 &lsp->ls_stateid,
5972 cred);
795a88c9 5973 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5974 ret = status;
5975 }
5976 }
5977 };
5978
5979 return ret;
5980}
5981
5982static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5983{
5984 int status = NFS_OK;
5985
5986 if (test_bit(LK_STATE_IN_USE, &state->flags))
5987 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5988 if (status != NFS_OK)
5989 status = nfs4_lock_expired(state, request);
5990 return status;
f062eb6c
BS		 5991}
5992#endif
5993
1da177e4
LT		 5994static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5995{
19e03c57 5996 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5997 unsigned char fl_flags = request->fl_flags;
8e469ebd 5998 int status = -ENOLCK;
1da177e4 5999
8e469ebd
TM		 6000 if ((fl_flags & FL_POSIX) &&
6001 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6002 goto out;
6bfc93ef 6003 /* Is this a delegated open? */
6bfc93ef
TM		 6004 status = nfs4_set_lock_state(state, request);
6005 if (status != 0)
6006 goto out;
01c3b861
TM		 6007 request->fl_flags |= FL_ACCESS;
6008 status = do_vfs_lock(request->fl_file, request);
6009 if (status < 0)
6010 goto out;
19e03c57 6011 down_read(&nfsi->rwsem);
01c3b861 6012 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6013 /* Yes: cache locks! */
01c3b861 6014 /* ...but avoid races with delegation recall... */
19e03c57
TM		 6015 request->fl_flags = fl_flags & ~FL_SLEEP;
6016 status = do_vfs_lock(request->fl_file, request);
c69899a1 6017 up_read(&nfsi->rwsem);
9a99af49 6018 goto out;
9a99af49 6019 }
19e03c57 6020 up_read(&nfsi->rwsem);
c69899a1 6021 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6022out:
6023 request->fl_flags = fl_flags;
1da177e4
LT		 6024 return status;
6025}
6026
6027static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6028{
a1d0b5ee
TM		 6029 struct nfs4_exception exception = {
6030 .state = state,
05ffe24f 6031 .inode = state->inode,
a1d0b5ee 6032 };
1da177e4
LT		 6033 int err;
6034
6035 do {
965b5d67 6036 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6037 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6038 if (err == -NFS4ERR_DENIED)
6039 err = -EAGAIN;
1da177e4 6040 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6041 err, &exception);
1da177e4
LT		 6042 } while (exception.retry);
6043 return err;
6044}
6045
6046static int
6047nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6048{
6049 struct nfs_open_context *ctx;
6050 struct nfs4_state *state;
6051 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6052 int status;
6053
6054 /* verify open state */
cd3758e3 6055 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6056 state = ctx->state;
6057
6058 if (request->fl_start < 0 || request->fl_end < 0)
6059 return -EINVAL;
6060
d953126a
TM		 6061 if (IS_GETLK(cmd)) {
6062 if (state != NULL)
6063 return nfs4_proc_getlk(state, F_GETLK, request);
6064 return 0;
6065 }
1da177e4
LT		 6066
6067 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6068 return -EINVAL;
6069
d953126a
TM		 6070 if (request->fl_type == F_UNLCK) {
6071 if (state != NULL)
6072 return nfs4_proc_unlck(state, cmd, request);
6073 return 0;
6074 }
1da177e4 6075
d953126a
TM		 6076 if (state == NULL)
6077 return -ENOLCK;
55725513
TM		 6078 /*
6079 * Don't rely on the VFS having checked the file open mode,
6080 * since it won't do this for flock() locks.
6081 */
f44106e2 6082 switch (request->fl_type) {
55725513
TM		 6083 case F_RDLCK:
6084 if (!(filp->f_mode & FMODE_READ))
6085 return -EBADF;
6086 break;
6087 case F_WRLCK:
6088 if (!(filp->f_mode & FMODE_WRITE))
6089 return -EBADF;
6090 }
6091
1da177e4
LT		 6092 do {
6093 status = nfs4_proc_setlk(state, cmd, request);
6094 if ((status != -EAGAIN) || IS_SETLK(cmd))
6095 break;
6096 timeout = nfs4_set_lock_task_retry(timeout);
6097 status = -ERESTARTSYS;
6098 if (signalled())
6099 break;
6100 } while(status < 0);
1da177e4
LT		 6101 return status;
6102}
6103
db4f2e63 6104int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6105{
6106 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6107 int err;
6108
6109 err = nfs4_set_lock_state(state, fl);
6110 if (err != 0)
db4f2e63 6111 return err;
4a706fa0 6112 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6113 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6114}
6b3b5496 6115
cf470c3e
TM		 6116struct nfs_release_lockowner_data {
6117 struct nfs4_lock_state *lsp;
5ae67c4f 6118 struct nfs_server *server;
cf470c3e 6119 struct nfs_release_lockowner_args args;
b7e63a10 6120 struct nfs_release_lockowner_res res;
60ea6812 6121 unsigned long timestamp;
cf470c3e
TM		 6122};
6123
fbd4bfd1
CL		 6124static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6125{
6126 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6127 struct nfs_server *server = data->server;
cb04ad2a
PT		 6128 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6129 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6130 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6131 data->timestamp = jiffies;
fbd4bfd1
CL		 6132}
6133
6134static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6135{
6136 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6137 struct nfs_server *server = data->server;
6138
b7e63a10 6139 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6140
6141 switch (task->tk_status) {
6142 case 0:
6143 renew_lease(server, data->timestamp);
6144 break;
6145 case -NFS4ERR_STALE_CLIENTID:
6146 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6147 nfs4_schedule_lease_recovery(server->nfs_client);
6148 break;
60ea6812
CL		 6149 case -NFS4ERR_LEASE_MOVED:
6150 case -NFS4ERR_DELAY:
8478eaa1
N		 6151 if (nfs4_async_handle_error(task, server,
6152 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6153 rpc_restart_call_prepare(task);
6154 }
fbd4bfd1
CL		 6155}
6156
d3c7b7cc
TM		 6157static void nfs4_release_lockowner_release(void *calldata)
6158{
cf470c3e 6159 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6160 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6161 kfree(calldata);
6162}
6163
17280175 6164static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6165 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6166 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6167 .rpc_release = nfs4_release_lockowner_release,
6168};
6169
f1cdae87
JL		 6170static void
6171nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6172{
cf470c3e 6173 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6174 struct rpc_message msg = {
6175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6176 };
6177
6178 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6179 return;
fbd4bfd1 6180
cf470c3e
TM		 6181 data = kmalloc(sizeof(*data), GFP_NOFS);
6182 if (!data)
f1cdae87 6183 return;
cf470c3e 6184 data->lsp = lsp;
5ae67c4f 6185 data->server = server;
cf470c3e
TM		 6186 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6187 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6188 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6189
cf470c3e 6190 msg.rpc_argp = &data->args;
b7e63a10
TM		 6191 msg.rpc_resp = &data->res;
6192 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6193 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6194}
6195
aa1870af
BF		 6196#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6197
64c2ce8b
AK		 6198static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6199 const void *buf, size_t buflen,
6200 int flags, int type)
6b3b5496 6201{
64c2ce8b
AK		 6202 if (strcmp(key, "") != 0)
6203 return -EINVAL;
4b580ee3 6204
2b0143b5 6205 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6206}
6207
64c2ce8b
AK		 6208static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6209 void *buf, size_t buflen, int type)
6b3b5496 6210{
64c2ce8b
AK		 6211 if (strcmp(key, "") != 0)
6212 return -EINVAL;
aa1870af 6213
2b0143b5 6214 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6215}
6216
64c2ce8b
AK		 6217static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6218 size_t list_len, const char *name,
6219 size_t name_len, int type)
6b3b5496 6220{
64c2ce8b 6221 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6222
2b0143b5 6223 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6224 return 0;
64c2ce8b
AK		 6225
6226 if (list && len <= list_len)
6227 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6228 return len;
6b3b5496
BF		 6229}
6230
c9bccef6
DQ		 6231#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6232static inline int nfs4_server_supports_labels(struct nfs_server *server)
6233{
6234 return server->caps & NFS_CAP_SECURITY_LABEL;
6235}
6236
6237static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6238 const void *buf, size_t buflen,
6239 int flags, int type)
6240{
6241 if (security_ismaclabel(key))
6242 return nfs4_set_security_label(dentry, buf, buflen);
6243
6244 return -EOPNOTSUPP;
6245}
6246
6247static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6248 void *buf, size_t buflen, int type)
6249{
6250 if (security_ismaclabel(key))
2b0143b5 6251 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6252 return -EOPNOTSUPP;
6253}
6254
6255static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6256 size_t list_len, const char *name,
6257 size_t name_len, int type)
6258{
6259 size_t len = 0;
6260
2b0143b5
DH		 6261 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6262 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6263 if (list && len <= list_len)
2b0143b5 6264 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6265 }
6266 return len;
6267}
6268
6269static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6270 .prefix = XATTR_SECURITY_PREFIX,
6271 .list = nfs4_xattr_list_nfs4_label,
6272 .get = nfs4_xattr_get_nfs4_label,
6273 .set = nfs4_xattr_set_nfs4_label,
6274};
6275#endif
6276
6277
533eb461
AA		 6278/*
6279 * nfs_fhget will use either the mounted_on_fileid or the fileid
6280 */
69aaaae1
TM		 6281static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6282{
533eb461
AA		 6283 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6284 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6285 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6286 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6287 return;
6288
6289 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6290 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6291 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6292 fattr->nlink = 2;
6293}
6294
f05d147f
BS		 6295static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6296 const struct qstr *name,
6297 struct nfs4_fs_locations *fs_locations,
6298 struct page *page)
683b57b4
TM		 6299{
6300 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6301 u32 bitmask[3] = {
361e624f 6302 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6303 };
6304 struct nfs4_fs_locations_arg args = {
6305 .dir_fh = NFS_FH(dir),
c228fd3a 6306 .name = name,
683b57b4
TM		 6307 .page = page,
6308 .bitmask = bitmask,
6309 };
22958463
BH		 6310 struct nfs4_fs_locations_res res = {
6311 .fs_locations = fs_locations,
6312 };
683b57b4
TM		 6313 struct rpc_message msg = {
6314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6315 .rpc_argp = &args,
22958463 6316 .rpc_resp = &res,
683b57b4
TM		 6317 };
6318 int status;
6319
3110ff80 6320 dprintk("%s: start\n", __func__);
533eb461
AA		 6321
6322 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6323 * is not supported */
6324 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6325 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6326 else
6327 bitmask[0] |= FATTR4_WORD0_FILEID;
6328
c228fd3a 6329 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6330 fs_locations->server = server;
830b8e33 6331 fs_locations->nlocations = 0;
f05d147f 6332 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6333 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6334 return status;
6335}
6336
f05d147f
BS		 6337int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6338 const struct qstr *name,
6339 struct nfs4_fs_locations *fs_locations,
6340 struct page *page)
db0a9593
BS		 6341{
6342 struct nfs4_exception exception = { };
6343 int err;
6344 do {
078ea3df
TM		 6345 err = _nfs4_proc_fs_locations(client, dir, name,
6346 fs_locations, page);
6347 trace_nfs4_get_fs_locations(dir, name, err);
6348 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6349 &exception);
6350 } while (exception.retry);
6351 return err;
6352}
6353
b03d735b
CL		 6354/*
6355 * This operation also signals the server that this client is
6356 * performing migration recovery. The server can stop returning
6357 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6358 * appended to this compound to identify the client ID which is
6359 * performing recovery.
6360 */
6361static int _nfs40_proc_get_locations(struct inode *inode,
6362 struct nfs4_fs_locations *locations,
6363 struct page *page, struct rpc_cred *cred)
6364{
6365 struct nfs_server *server = NFS_SERVER(inode);
6366 struct rpc_clnt *clnt = server->client;
6367 u32 bitmask[2] = {
6368 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6369 };
6370 struct nfs4_fs_locations_arg args = {
6371 .clientid = server->nfs_client->cl_clientid,
6372 .fh = NFS_FH(inode),
6373 .page = page,
6374 .bitmask = bitmask,
6375 .migration = 1, /* skip LOOKUP */
6376 .renew = 1, /* append RENEW */
6377 };
6378 struct nfs4_fs_locations_res res = {
6379 .fs_locations = locations,
6380 .migration = 1,
6381 .renew = 1,
6382 };
6383 struct rpc_message msg = {
6384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6385 .rpc_argp = &args,
6386 .rpc_resp = &res,
6387 .rpc_cred = cred,
6388 };
6389 unsigned long now = jiffies;
6390 int status;
6391
6392 nfs_fattr_init(&locations->fattr);
6393 locations->server = server;
6394 locations->nlocations = 0;
6395
6396 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6397 nfs4_set_sequence_privileged(&args.seq_args);
6398 status = nfs4_call_sync_sequence(clnt, server, &msg,
6399 &args.seq_args, &res.seq_res);
6400 if (status)
6401 return status;
6402
6403 renew_lease(server, now);
6404 return 0;
6405}
6406
6407#ifdef CONFIG_NFS_V4_1
6408
6409/*
6410 * This operation also signals the server that this client is
6411 * performing migration recovery. The server can stop asserting
6412 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6413 * performing this operation is identified in the SEQUENCE
6414 * operation in this compound.
6415 *
6416 * When the client supports GETATTR(fs_locations_info), it can
6417 * be plumbed in here.
6418 */
6419static int _nfs41_proc_get_locations(struct inode *inode,
6420 struct nfs4_fs_locations *locations,
6421 struct page *page, struct rpc_cred *cred)
6422{
6423 struct nfs_server *server = NFS_SERVER(inode);
6424 struct rpc_clnt *clnt = server->client;
6425 u32 bitmask[2] = {
6426 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6427 };
6428 struct nfs4_fs_locations_arg args = {
6429 .fh = NFS_FH(inode),
6430 .page = page,
6431 .bitmask = bitmask,
6432 .migration = 1, /* skip LOOKUP */
6433 };
6434 struct nfs4_fs_locations_res res = {
6435 .fs_locations = locations,
6436 .migration = 1,
6437 };
6438 struct rpc_message msg = {
6439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6440 .rpc_argp = &args,
6441 .rpc_resp = &res,
6442 .rpc_cred = cred,
6443 };
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 == NFS4_OK &&
6455 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6456 status = -NFS4ERR_LEASE_MOVED;
6457 return status;
6458}
6459
6460#endif /* CONFIG_NFS_V4_1 */
6461
6462/**
6463 * nfs4_proc_get_locations - discover locations for a migrated FSID
6464 * @inode: inode on FSID that is migrating
6465 * @locations: result of query
6466 * @page: buffer
6467 * @cred: credential to use for this operation
6468 *
6469 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6470 * operation failed, or a negative errno if a local error occurred.
6471 *
6472 * On success, "locations" is filled in, but if the server has
6473 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6474 * asserted.
6475 *
6476 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6477 * from this client that require migration recovery.
6478 */
6479int nfs4_proc_get_locations(struct inode *inode,
6480 struct nfs4_fs_locations *locations,
6481 struct page *page, struct rpc_cred *cred)
6482{
6483 struct nfs_server *server = NFS_SERVER(inode);
6484 struct nfs_client *clp = server->nfs_client;
6485 const struct nfs4_mig_recovery_ops *ops =
6486 clp->cl_mvops->mig_recovery_ops;
6487 struct nfs4_exception exception = { };
6488 int status;
6489
6490 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6491 (unsigned long long)server->fsid.major,
6492 (unsigned long long)server->fsid.minor,
6493 clp->cl_hostname);
6494 nfs_display_fhandle(NFS_FH(inode), __func__);
6495
6496 do {
6497 status = ops->get_locations(inode, locations, page, cred);
6498 if (status != -NFS4ERR_DELAY)
6499 break;
6500 nfs4_handle_exception(server, status, &exception);
6501 } while (exception.retry);
6502 return status;
6503}
6504
44c99933
CL		 6505/*
6506 * This operation also signals the server that this client is
6507 * performing "lease moved" recovery. The server can stop
6508 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6509 * is appended to this compound to identify the client ID which is
6510 * performing recovery.
6511 */
6512static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6513{
6514 struct nfs_server *server = NFS_SERVER(inode);
6515 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6516 struct rpc_clnt *clnt = server->client;
6517 struct nfs4_fsid_present_arg args = {
6518 .fh = NFS_FH(inode),
6519 .clientid = clp->cl_clientid,
6520 .renew = 1, /* append RENEW */
6521 };
6522 struct nfs4_fsid_present_res res = {
6523 .renew = 1,
6524 };
6525 struct rpc_message msg = {
6526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6527 .rpc_argp = &args,
6528 .rpc_resp = &res,
6529 .rpc_cred = cred,
6530 };
6531 unsigned long now = jiffies;
6532 int status;
6533
6534 res.fh = nfs_alloc_fhandle();
6535 if (res.fh == NULL)
6536 return -ENOMEM;
6537
6538 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6539 nfs4_set_sequence_privileged(&args.seq_args);
6540 status = nfs4_call_sync_sequence(clnt, server, &msg,
6541 &args.seq_args, &res.seq_res);
6542 nfs_free_fhandle(res.fh);
6543 if (status)
6544 return status;
6545
6546 do_renew_lease(clp, now);
6547 return 0;
6548}
6549
6550#ifdef CONFIG_NFS_V4_1
6551
6552/*
6553 * This operation also signals the server that this client is
6554 * performing "lease moved" recovery. The server can stop asserting
6555 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6556 * this operation is identified in the SEQUENCE operation in this
6557 * compound.
6558 */
6559static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6560{
6561 struct nfs_server *server = NFS_SERVER(inode);
6562 struct rpc_clnt *clnt = server->client;
6563 struct nfs4_fsid_present_arg args = {
6564 .fh = NFS_FH(inode),
6565 };
6566 struct nfs4_fsid_present_res res = {
6567 };
6568 struct rpc_message msg = {
6569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6570 .rpc_argp = &args,
6571 .rpc_resp = &res,
6572 .rpc_cred = cred,
6573 };
6574 int status;
6575
6576 res.fh = nfs_alloc_fhandle();
6577 if (res.fh == NULL)
6578 return -ENOMEM;
6579
6580 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6581 nfs4_set_sequence_privileged(&args.seq_args);
6582 status = nfs4_call_sync_sequence(clnt, server, &msg,
6583 &args.seq_args, &res.seq_res);
6584 nfs_free_fhandle(res.fh);
6585 if (status == NFS4_OK &&
6586 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6587 status = -NFS4ERR_LEASE_MOVED;
6588 return status;
6589}
6590
6591#endif /* CONFIG_NFS_V4_1 */
6592
6593/**
6594 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6595 * @inode: inode on FSID to check
6596 * @cred: credential to use for this operation
6597 *
6598 * Server indicates whether the FSID is present, moved, or not
6599 * recognized. This operation is necessary to clear a LEASE_MOVED
6600 * condition for this client ID.
6601 *
6602 * Returns NFS4_OK if the FSID is present on this server,
6603 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6604 * NFS4ERR code if some error occurred on the server, or a
6605 * negative errno if a local failure occurred.
6606 */
6607int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6608{
6609 struct nfs_server *server = NFS_SERVER(inode);
6610 struct nfs_client *clp = server->nfs_client;
6611 const struct nfs4_mig_recovery_ops *ops =
6612 clp->cl_mvops->mig_recovery_ops;
6613 struct nfs4_exception exception = { };
6614 int status;
6615
6616 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6617 (unsigned long long)server->fsid.major,
6618 (unsigned long long)server->fsid.minor,
6619 clp->cl_hostname);
6620 nfs_display_fhandle(NFS_FH(inode), __func__);
6621
6622 do {
6623 status = ops->fsid_present(inode, cred);
6624 if (status != -NFS4ERR_DELAY)
6625 break;
6626 nfs4_handle_exception(server, status, &exception);
6627 } while (exception.retry);
6628 return status;
6629}
6630
5ec16a85 6631/**
a5250def
WAA		 6632 * If 'use_integrity' is true and the state managment nfs_client
6633 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6634 * and the machine credential as per RFC3530bis and RFC5661 Security
6635 * Considerations sections. Otherwise, just use the user cred with the
6636 * filesystem's rpc_client.
5ec16a85 6637 */
a5250def 6638static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6639{
6640 int status;
6641 struct nfs4_secinfo_arg args = {
6642 .dir_fh = NFS_FH(dir),
6643 .name = name,
6644 };
6645 struct nfs4_secinfo_res res = {
6646 .flavors = flavors,
6647 };
6648 struct rpc_message msg = {
6649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6650 .rpc_argp = &args,
6651 .rpc_resp = &res,
6652 };
a5250def 6653 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6654 struct rpc_cred *cred = NULL;
a5250def
WAA		 6655
6656 if (use_integrity) {
6657 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6658 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6659 msg.rpc_cred = cred;
a5250def 6660 }
5a5ea0d4
BS		 6661
6662 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6663
6664 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6665 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6666
a5250def
WAA		 6667 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6668 &res.seq_res, 0);
5a5ea0d4 6669 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6670
7cb852df
WAA		 6671 if (cred)
6672 put_rpccred(cred);
a5250def 6673
5a5ea0d4
BS		 6674 return status;
6675}
6676
72de53ec
BS		 6677int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6678 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6679{
6680 struct nfs4_exception exception = { };
6681 int err;
6682 do {
a5250def
WAA		 6683 err = -NFS4ERR_WRONGSEC;
6684
6685 /* try to use integrity protection with machine cred */
6686 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6687 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6688
6689 /*
6690 * if unable to use integrity protection, or SECINFO with
6691 * integrity protection returns NFS4ERR_WRONGSEC (which is
6692 * disallowed by spec, but exists in deployed servers) use
6693 * the current filesystem's rpc_client and the user cred.
6694 */
6695 if (err == -NFS4ERR_WRONGSEC)
6696 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6697
078ea3df
TM		 6698 trace_nfs4_secinfo(dir, name, err);
6699 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6700 &exception);
6701 } while (exception.retry);
6702 return err;
6703}
6704
557134a3 6705#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6706/*
6707 * Check the exchange flags returned by the server for invalid flags, having
6708 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6709 * DS flags set.
6710 */
6711static int nfs4_check_cl_exchange_flags(u32 flags)
6712{
6713 if (flags & ~EXCHGID4_FLAG_MASK_R)
6714 goto out_inval;
6715 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6716 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6717 goto out_inval;
6718 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6719 goto out_inval;
6720 return NFS_OK;
6721out_inval:
6722 return -NFS4ERR_INVAL;
6723}
6724
78fe0f41 6725static bool
79d4e1f0
CL		 6726nfs41_same_server_scope(struct nfs41_server_scope *a,
6727 struct nfs41_server_scope *b)
78fe0f41
WAA		 6728{
6729 if (a->server_scope_sz == b->server_scope_sz &&
6730 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6731 return true;
6732
6733 return false;
6734}
6735
7c44f1ae
WAA		 6736/*
6737 * nfs4_proc_bind_conn_to_session()
6738 *
6739 * The 4.1 client currently uses the same TCP connection for the
6740 * fore and backchannel.
6741 */
2cf047c9 6742int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6743{
6744 int status;
71a097c6
TM		 6745 struct nfs41_bind_conn_to_session_args args = {
6746 .client = clp,
6747 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6748 };
7c44f1ae
WAA		 6749 struct nfs41_bind_conn_to_session_res res;
6750 struct rpc_message msg = {
6751 .rpc_proc =
6752 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6753 .rpc_argp = &args,
7c44f1ae 6754 .rpc_resp = &res,
2cf047c9 6755 .rpc_cred = cred,
7c44f1ae
WAA		 6756 };
6757
6758 dprintk("--> %s\n", __func__);
7c44f1ae 6759
71a097c6
TM		 6760 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6761 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6762 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6763
6764 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6765 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6766 if (status == 0) {
71a097c6 6767 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6768 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6769 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6770 status = -EIO;
71a097c6 6771 goto out;
7c44f1ae 6772 }
71a097c6 6773 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6774 dprintk("NFS: %s: Unexpected direction from server\n",
6775 __func__);
6776 status = -EIO;
71a097c6 6777 goto out;
7c44f1ae 6778 }
71a097c6 6779 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6780 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6781 __func__);
6782 status = -EIO;
71a097c6 6783 goto out;
7c44f1ae
WAA		 6784 }
6785 }
7c44f1ae
WAA		 6786out:
6787 dprintk("<-- %s status= %d\n", __func__, status);
6788 return status;
6789}
6790
99fe60d0 6791/*
fa940720
WAA		 6792 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6793 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6794 */
6795static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6796 .how = SP4_MACH_CRED,
6797 .enforce.u.words = {
6798 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6799 1 << (OP_EXCHANGE_ID - 32) |
6800 1 << (OP_CREATE_SESSION - 32) |
6801 1 << (OP_DESTROY_SESSION - 32) |
6802 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6803 },
6804 .allow.u.words = {
6805 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6806 1 << (OP_LOCKU) |
6807 1 << (OP_COMMIT),
8b5bee2e 6808 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6809 1 << (OP_SECINFO_NO_NAME - 32) |
6810 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6811 1 << (OP_FREE_STATEID - 32) |
6812 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6813 }
6814};
6815
6816/*
6817 * Select the state protection mode for client `clp' given the server results
6818 * from exchange_id in `sp'.
99fe60d0 6819 *
2031cd1a
WAA		 6820 * Returns 0 on success, negative errno otherwise.
6821 */
6822static int nfs4_sp4_select_mode(struct nfs_client *clp,
6823 struct nfs41_state_protection *sp)
6824{
6825 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6826 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6827 1 << (OP_EXCHANGE_ID - 32) |
6828 1 << (OP_CREATE_SESSION - 32) |
6829 1 << (OP_DESTROY_SESSION - 32) |
6830 1 << (OP_DESTROY_CLIENTID - 32)
6831 };
6832 unsigned int i;
6833
6834 if (sp->how == SP4_MACH_CRED) {
6835 /* Print state protect result */
6836 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6837 for (i = 0; i <= LAST_NFS4_OP; i++) {
6838 if (test_bit(i, sp->enforce.u.longs))
6839 dfprintk(MOUNT, " enforce op %d\n", i);
6840 if (test_bit(i, sp->allow.u.longs))
6841 dfprintk(MOUNT, " allow op %d\n", i);
6842 }
6843
6844 /* make sure nothing is on enforce list that isn't supported */
6845 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6846 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6847 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6848 return -EINVAL;
6849 }
6850 }
6851
6852 /*
6853 * Minimal mode - state operations are allowed to use machine
6854 * credential. Note this already happens by default, so the
6855 * client doesn't have to do anything more than the negotiation.
6856 *
6857 * NOTE: we don't care if EXCHANGE_ID is in the list -
6858 * we're already using the machine cred for exchange_id
6859 * and will never use a different cred.
6860 */
6861 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6862 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6863 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6864 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6865 dfprintk(MOUNT, "sp4_mach_cred:\n");
6866 dfprintk(MOUNT, " minimal mode enabled\n");
6867 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6868 } else {
6869 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6870 return -EINVAL;
6871 }
fa940720
WAA		 6872
6873 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6874 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6875 dfprintk(MOUNT, " cleanup mode enabled\n");
6876 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6877 }
8b5bee2e
WAA		 6878
6879 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6880 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6881 dfprintk(MOUNT, " secinfo mode enabled\n");
6882 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6883 }
3787d506
WAA		 6884
6885 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6886 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6887 dfprintk(MOUNT, " stateid mode enabled\n");
6888 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6889 }
8c21c62c
WAA		 6890
6891 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6892 dfprintk(MOUNT, " write mode enabled\n");
6893 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6894 }
6895
6896 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6897 dfprintk(MOUNT, " commit mode enabled\n");
6898 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6899 }
2031cd1a
WAA		 6900 }
6901
6902 return 0;
6903}
6904
6905/*
6906 * _nfs4_proc_exchange_id()
6bbb4ae8 6907 *
2031cd1a 6908 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6909 */
2031cd1a
WAA		 6910static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6911 u32 sp4_how)
99fe60d0
BH		 6912{
6913 nfs4_verifier verifier;
6914 struct nfs41_exchange_id_args args = {
cd93710e 6915 .verifier = &verifier,
99fe60d0 6916 .client = clp,
cd3fadec 6917#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6918 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6919 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6920 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6921#else
6922 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6923 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6924#endif
99fe60d0
BH		 6925 };
6926 struct nfs41_exchange_id_res res = {
32b01310 6927 0
99fe60d0
BH		 6928 };
6929 int status;
6930 struct rpc_message msg = {
6931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6932 .rpc_argp = &args,
6933 .rpc_resp = &res,
6934 .rpc_cred = cred,
6935 };
99fe60d0 6936
f092075d 6937 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6938
6939 status = nfs4_init_uniform_client_string(clp);
6940 if (status)
3a6bb738 6941 goto out;
3a6bb738
JL		 6942
6943 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6944 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6945 clp->cl_owner_id);
99fe60d0 6946
acdeb69d 6947 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6948 GFP_NOFS);
acdeb69d 6949 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6950 status = -ENOMEM;
6951 goto out;
6952 }
78fe0f41 6953
79d4e1f0 6954 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6955 GFP_NOFS);
177313f1 6956 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6957 status = -ENOMEM;
acdeb69d 6958 goto out_server_owner;
abe9a6d5 6959 }
78fe0f41 6960
bbafffd2 6961 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6962 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6963 status = -ENOMEM;
6964 goto out_server_scope;
6965 }
6966
2031cd1a
WAA		 6967 switch (sp4_how) {
6968 case SP4_NONE:
6969 args.state_protect.how = SP4_NONE;
6970 break;
6971
6972 case SP4_MACH_CRED:
6973 args.state_protect = nfs4_sp4_mach_cred_request;
6974 break;
6975
6976 default:
6977 /* unsupported! */
6978 WARN_ON_ONCE(1);
6979 status = -EINVAL;
6b55970b 6980 goto out_impl_id;
2031cd1a
WAA		 6981 }
6982
1bd714f2 6983 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6984 trace_nfs4_exchange_id(clp, status);
177313f1 6985 if (status == 0)
32b01310 6986 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6987
2031cd1a
WAA		 6988 if (status == 0)
6989 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6990
acdeb69d 6991 if (status == 0) {
32b01310 6992 clp->cl_clientid = res.clientid;
e11259f9
TM		 6993 clp->cl_exchange_flags = res.flags;
6994 /* Client ID is not confirmed */
6995 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6996 clear_bit(NFS4_SESSION_ESTABLISHED,
6997 &clp->cl_session->session_state);
32b01310 6998 clp->cl_seqid = res.seqid;
e11259f9 6999 }
32b01310 7000
acdeb69d
CL		 7001 kfree(clp->cl_serverowner);
7002 clp->cl_serverowner = res.server_owner;
7003 res.server_owner = NULL;
78fe0f41 7004
7d2ed9ac 7005 /* use the most recent implementation id */
59155546
CL		 7006 kfree(clp->cl_implid);
7007 clp->cl_implid = res.impl_id;
6b55970b 7008 res.impl_id = NULL;
7d2ed9ac 7009
177313f1 7010 if (clp->cl_serverscope != NULL &&
79d4e1f0 7011 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7012 res.server_scope)) {
7013 dprintk("%s: server_scope mismatch detected\n",
7014 __func__);
7015 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7016 kfree(clp->cl_serverscope);
7017 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7018 }
7019
177313f1 7020 if (clp->cl_serverscope == NULL) {
79d4e1f0 7021 clp->cl_serverscope = res.server_scope;
6b55970b 7022 res.server_scope = NULL;
abe9a6d5 7023 }
6b55970b 7024 }
7d2ed9ac 7025
6b55970b
KM		 7026out_impl_id:
7027 kfree(res.impl_id);
7d2ed9ac 7028out_server_scope:
abe9a6d5 7029 kfree(res.server_scope);
6b55970b
KM		 7030out_server_owner:
7031 kfree(res.server_owner);
abe9a6d5 7032out:
177313f1 7033 if (clp->cl_implid != NULL)
6bbb4ae8 7034 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7035 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7036 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7037 clp->cl_implid->date.seconds,
7038 clp->cl_implid->date.nseconds);
6bbb4ae8 7039 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7040 return status;
7041}
7042
2031cd1a
WAA		 7043/*
7044 * nfs4_proc_exchange_id()
7045 *
7046 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7047 *
7048 * Since the clientid has expired, all compounds using sessions
7049 * associated with the stale clientid will be returning
7050 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7051 * be in some phase of session reset.
7052 *
7053 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7054 */
7055int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7056{
7057 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7058 int status;
7059
7060 /* try SP4_MACH_CRED if krb5i/p */
7061 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7062 authflavor == RPC_AUTH_GSS_KRB5P) {
7063 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7064 if (!status)
7065 return 0;
7066 }
7067
7068 /* try SP4_NONE */
7069 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7070}
7071
66245539
TM		 7072static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7073 struct rpc_cred *cred)
7074{
7075 struct rpc_message msg = {
7076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7077 .rpc_argp = clp,
7078 .rpc_cred = cred,
7079 };
7080 int status;
7081
7082 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7083 trace_nfs4_destroy_clientid(clp, status);
66245539 7084 if (status)
02c67525 7085 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7086 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7087 return status;
7088}
7089
7090static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7091 struct rpc_cred *cred)
7092{
7093 unsigned int loop;
7094 int ret;
7095
7096 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7097 ret = _nfs4_proc_destroy_clientid(clp, cred);
7098 switch (ret) {
7099 case -NFS4ERR_DELAY:
7100 case -NFS4ERR_CLIENTID_BUSY:
7101 ssleep(1);
7102 break;
7103 default:
7104 return ret;
7105 }
7106 }
7107 return 0;
7108}
7109
7110int nfs4_destroy_clientid(struct nfs_client *clp)
7111{
7112 struct rpc_cred *cred;
7113 int ret = 0;
7114
7115 if (clp->cl_mvops->minor_version < 1)
7116 goto out;
7117 if (clp->cl_exchange_flags == 0)
7118 goto out;
05f4c350
CL		 7119 if (clp->cl_preserve_clid)
7120 goto out;
73d8bde5 7121 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7122 ret = nfs4_proc_destroy_clientid(clp, cred);
7123 if (cred)
7124 put_rpccred(cred);
7125 switch (ret) {
7126 case 0:
7127 case -NFS4ERR_STALE_CLIENTID:
7128 clp->cl_exchange_flags = 0;
7129 }
7130out:
7131 return ret;
7132}
7133
2050f0cc
AA		 7134struct nfs4_get_lease_time_data {
7135 struct nfs4_get_lease_time_args *args;
7136 struct nfs4_get_lease_time_res *res;
7137 struct nfs_client *clp;
7138};
7139
7140static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7141 void *calldata)
7142{
2050f0cc
AA		 7143 struct nfs4_get_lease_time_data *data =
7144 (struct nfs4_get_lease_time_data *)calldata;
7145
7146 dprintk("--> %s\n", __func__);
7147 /* just setup sequence, do not trigger session recovery
7148 since we're invoked within one */
d9afbd1b
TM		 7149 nfs41_setup_sequence(data->clp->cl_session,
7150 &data->args->la_seq_args,
7151 &data->res->lr_seq_res,
7152 task);
2050f0cc
AA		 7153 dprintk("<-- %s\n", __func__);
7154}
7155
7156/*
7157 * Called from nfs4_state_manager thread for session setup, so don't recover
7158 * from sequence operation or clientid errors.
7159 */
7160static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7161{
7162 struct nfs4_get_lease_time_data *data =
7163 (struct nfs4_get_lease_time_data *)calldata;
7164
7165 dprintk("--> %s\n", __func__);
14516c3a
TM		 7166 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7167 return;
2050f0cc
AA		 7168 switch (task->tk_status) {
7169 case -NFS4ERR_DELAY:
7170 case -NFS4ERR_GRACE:
7171 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7172 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7173 task->tk_status = 0;
a8a4ae3a
AA		 7174 /* fall through */
7175 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7176 rpc_restart_call_prepare(task);
2050f0cc
AA		 7177 return;
7178 }
2050f0cc
AA		 7179 dprintk("<-- %s\n", __func__);
7180}
7181
17280175 7182static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7183 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7184 .rpc_call_done = nfs4_get_lease_time_done,
7185};
7186
7187int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7188{
7189 struct rpc_task *task;
7190 struct nfs4_get_lease_time_args args;
7191 struct nfs4_get_lease_time_res res = {
7192 .lr_fsinfo = fsinfo,
7193 };
7194 struct nfs4_get_lease_time_data data = {
7195 .args = &args,
7196 .res = &res,
7197 .clp = clp,
7198 };
7199 struct rpc_message msg = {
7200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7201 .rpc_argp = &args,
7202 .rpc_resp = &res,
7203 };
7204 struct rpc_task_setup task_setup = {
7205 .rpc_client = clp->cl_rpcclient,
7206 .rpc_message = &msg,
7207 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7208 .callback_data = &data,
7209 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7210 };
7211 int status;
7212
a9c92d6b 7213 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7214 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7215 dprintk("--> %s\n", __func__);
7216 task = rpc_run_task(&task_setup);
7217
7218 if (IS_ERR(task))
7219 status = PTR_ERR(task);
7220 else {
7221 status = task->tk_status;
7222 rpc_put_task(task);
7223 }
7224 dprintk("<-- %s return %d\n", __func__, status);
7225
7226 return status;
7227}
7228
fc931582
AA		 7229/*
7230 * Initialize the values to be used by the client in CREATE_SESSION
7231 * If nfs4_init_session set the fore channel request and response sizes,
7232 * use them.
7233 *
7234 * Set the back channel max_resp_sz_cached to zero to force the client to
7235 * always set csa_cachethis to FALSE because the current implementation
7236 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7237 */
7238static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7239{
18aad3d5
AA		 7240 unsigned int max_rqst_sz, max_resp_sz;
7241
7242 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7243 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7244
fc931582 7245 /* Fore channel attributes */
18aad3d5
AA		 7246 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7247 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7248 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7249 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7250
7251 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7252 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7253 __func__,
7254 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7255 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7256
7257 /* Back channel attributes */
fc931582
AA		 7258 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7259 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7260 args->bc_attrs.max_resp_sz_cached = 0;
7261 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7262 args->bc_attrs.max_reqs = 1;
7263
7264 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7265 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7266 __func__,
7267 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7268 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7269 args->bc_attrs.max_reqs);
7270}
7271
79969dd1
TM		 7272static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7273 struct nfs41_create_session_res *res)
8d35301d 7274{
43c2e885 7275 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7276 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7277
43c2e885
BF		 7278 if (rcvd->max_resp_sz > sent->max_resp_sz)
7279 return -EINVAL;
7280 /*
7281 * Our requested max_ops is the minimum we need; we're not
7282 * prepared to break up compounds into smaller pieces than that.
7283 * So, no point even trying to continue if the server won't
7284 * cooperate:
7285 */
7286 if (rcvd->max_ops < sent->max_ops)
7287 return -EINVAL;
7288 if (rcvd->max_reqs == 0)
7289 return -EINVAL;
b4b9a0c1
VG		 7290 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7291 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7292 return 0;
8d35301d
AA		 7293}
7294
79969dd1
TM		 7295static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7296 struct nfs41_create_session_res *res)
43c2e885
BF		 7297{
7298 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7299 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7300
b1c0df5f
TM		 7301 if (!(res->flags & SESSION4_BACK_CHAN))
7302 goto out;
43c2e885
BF		 7303 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7304 return -EINVAL;
7305 if (rcvd->max_resp_sz < sent->max_resp_sz)
7306 return -EINVAL;
7307 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7308 return -EINVAL;
7309 /* These would render the backchannel useless: */
b4b9a0c1 7310 if (rcvd->max_ops != sent->max_ops)
43c2e885 7311 return -EINVAL;
b4b9a0c1 7312 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7313 return -EINVAL;
b1c0df5f 7314out:
43c2e885
BF		 7315 return 0;
7316}
8d35301d 7317
8d35301d 7318static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7319 struct nfs41_create_session_res *res)
8d35301d 7320{
43c2e885 7321 int ret;
8d35301d 7322
79969dd1 7323 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7324 if (ret)
7325 return ret;
79969dd1
TM		 7326 return nfs4_verify_back_channel_attrs(args, res);
7327}
7328
7329static void nfs4_update_session(struct nfs4_session *session,
7330 struct nfs41_create_session_res *res)
7331{
7332 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7333 /* Mark client id and session as being confirmed */
7334 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7335 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7336 session->flags = res->flags;
7337 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7338 if (res->flags & SESSION4_BACK_CHAN)
7339 memcpy(&session->bc_attrs, &res->bc_attrs,
7340 sizeof(session->bc_attrs));
8d35301d
AA		 7341}
7342
848f5bda
TM		 7343static int _nfs4_proc_create_session(struct nfs_client *clp,
7344 struct rpc_cred *cred)
fc931582
AA		 7345{
7346 struct nfs4_session *session = clp->cl_session;
7347 struct nfs41_create_session_args args = {
7348 .client = clp,
79969dd1
TM		 7349 .clientid = clp->cl_clientid,
7350 .seqid = clp->cl_seqid,
fc931582
AA		 7351 .cb_program = NFS4_CALLBACK,
7352 };
79969dd1
TM		 7353 struct nfs41_create_session_res res;
7354
fc931582
AA		 7355 struct rpc_message msg = {
7356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7357 .rpc_argp = &args,
7358 .rpc_resp = &res,
848f5bda 7359 .rpc_cred = cred,
fc931582
AA		 7360 };
7361 int status;
7362
7363 nfs4_init_channel_attrs(&args);
0f91421e 7364 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7365
1bd714f2 7366 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7367 trace_nfs4_create_session(clp, status);
fc931582 7368
43095d39 7369 if (!status) {
8d35301d 7370 /* Verify the session's negotiated channel_attrs values */
79969dd1 7371 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7372 /* Increment the clientid slot sequence id */
79969dd1
TM		 7373 if (clp->cl_seqid == res.seqid)
7374 clp->cl_seqid++;
7375 if (status)
7376 goto out;
7377 nfs4_update_session(session, &res);
fc931582 7378 }
79969dd1 7379out:
fc931582
AA		 7380 return status;
7381}
7382
7383/*
7384 * Issues a CREATE_SESSION operation to the server.
7385 * It is the responsibility of the caller to verify the session is
7386 * expired before calling this routine.
7387 */
848f5bda 7388int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7389{
7390 int status;
7391 unsigned *ptr;
fc931582
AA		 7392 struct nfs4_session *session = clp->cl_session;
7393
7394 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7395
848f5bda 7396 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7397 if (status)
7398 goto out;
7399
aacd5537
AA		 7400 /* Init or reset the session slot tables */
7401 status = nfs4_setup_session_slot_tables(session);
7402 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7403 if (status)
7404 goto out;
7405
7406 ptr = (unsigned *)&session->sess_id.data[0];
7407 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7408 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7409out:
7410 dprintk("<-- %s\n", __func__);
7411 return status;
7412}
7413
0f3e66c6
AA		 7414/*
7415 * Issue the over-the-wire RPC DESTROY_SESSION.
7416 * The caller must serialize access to this routine.
7417 */
848f5bda
TM		 7418int nfs4_proc_destroy_session(struct nfs4_session *session,
7419 struct rpc_cred *cred)
0f3e66c6 7420{
848f5bda
TM		 7421 struct rpc_message msg = {
7422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7423 .rpc_argp = session,
7424 .rpc_cred = cred,
7425 };
0f3e66c6 7426 int status = 0;
0f3e66c6
AA		 7427
7428 dprintk("--> nfs4_proc_destroy_session\n");
7429
7430 /* session is still being setup */
e11259f9
TM		 7431 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7432 return 0;
0f3e66c6 7433
1bd714f2 7434 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7435 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7436
7437 if (status)
08106ac7 7438 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7439 "Session has been destroyed regardless...\n", status);
7440
7441 dprintk("<-- nfs4_proc_destroy_session\n");
7442 return status;
7443}
7444
fc01cea9
AA		 7445/*
7446 * Renew the cl_session lease.
7447 */
d5f8d3fe
TM		 7448struct nfs4_sequence_data {
7449 struct nfs_client *clp;
7450 struct nfs4_sequence_args args;
7451 struct nfs4_sequence_res res;
7452};
7453
dc96aef9
AB		 7454static void nfs41_sequence_release(void *data)
7455{
d5f8d3fe
TM		 7456 struct nfs4_sequence_data *calldata = data;
7457 struct nfs_client *clp = calldata->clp;
dc96aef9 7458
7135840f
AB		 7459 if (atomic_read(&clp->cl_count) > 1)
7460 nfs4_schedule_state_renewal(clp);
7461 nfs_put_client(clp);
d5f8d3fe 7462 kfree(calldata);
dc96aef9
AB		 7463}
7464
aa5190d0
TM		 7465static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7466{
7467 switch(task->tk_status) {
7468 case -NFS4ERR_DELAY:
aa5190d0
TM		 7469 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7470 return -EAGAIN;
7471 default:
0400a6b0 7472 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7473 }
7474 return 0;
7475}
7476
dc96aef9 7477static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7478{
d5f8d3fe
TM		 7479 struct nfs4_sequence_data *calldata = data;
7480 struct nfs_client *clp = calldata->clp;
fc01cea9 7481
14516c3a
TM		 7482 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7483 return;
fc01cea9 7484
c6d01c6f 7485 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7486 if (task->tk_status < 0) {
7487 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7488 if (atomic_read(&clp->cl_count) == 1)
7489 goto out;
fc01cea9 7490
aa5190d0
TM		 7491 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7492 rpc_restart_call_prepare(task);
fc01cea9
AA		 7493 return;
7494 }
7495 }
fc01cea9 7496 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7497out:
fc01cea9
AA		 7498 dprintk("<-- %s\n", __func__);
7499}
7500
7501static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7502{
d5f8d3fe
TM		 7503 struct nfs4_sequence_data *calldata = data;
7504 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7505 struct nfs4_sequence_args *args;
7506 struct nfs4_sequence_res *res;
7507
fc01cea9
AA		 7508 args = task->tk_msg.rpc_argp;
7509 res = task->tk_msg.rpc_resp;
7510
d9afbd1b 7511 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7512}
7513
7514static const struct rpc_call_ops nfs41_sequence_ops = {
7515 .rpc_call_done = nfs41_sequence_call_done,
7516 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7517 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7518};
7519
8fe72bac
TM		 7520static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7521 struct rpc_cred *cred,
7522 bool is_privileged)
fc01cea9 7523{
d5f8d3fe 7524 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7525 struct rpc_message msg = {
7526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7527 .rpc_cred = cred,
7528 };
71ac6da9
TM		 7529 struct rpc_task_setup task_setup_data = {
7530 .rpc_client = clp->cl_rpcclient,
7531 .rpc_message = &msg,
8fe72bac 7532 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7533 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7534 };
fc01cea9 7535
7135840f 7536 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7537 return ERR_PTR(-EIO);
dfb4f309 7538 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7539 if (calldata == NULL) {
7135840f 7540 nfs_put_client(clp);
71ac6da9 7541 return ERR_PTR(-ENOMEM);
fc01cea9 7542 }
a9c92d6b 7543 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7544 if (is_privileged)
7545 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7546 msg.rpc_argp = &calldata->args;
7547 msg.rpc_resp = &calldata->res;
7548 calldata->clp = clp;
71ac6da9 7549 task_setup_data.callback_data = calldata;
fc01cea9 7550
71ac6da9
TM		 7551 return rpc_run_task(&task_setup_data);
7552}
7553
2f60ea6b 7554static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7555{
7556 struct rpc_task *task;
7557 int ret = 0;
7558
2f60ea6b 7559 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7560 return -EAGAIN;
8fe72bac 7561 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7562 if (IS_ERR(task))
7563 ret = PTR_ERR(task);
7564 else
bf294b41 7565 rpc_put_task_async(task);
71ac6da9
TM		 7566 dprintk("<-- %s status=%d\n", __func__, ret);
7567 return ret;
7568}
7569
7570static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7571{
7572 struct rpc_task *task;
7573 int ret;
7574
8fe72bac 7575 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7576 if (IS_ERR(task)) {
7577 ret = PTR_ERR(task);
7578 goto out;
7579 }
7580 ret = rpc_wait_for_completion_task(task);
be824167 7581 if (!ret)
71ac6da9
TM		 7582 ret = task->tk_status;
7583 rpc_put_task(task);
7584out:
7585 dprintk("<-- %s status=%d\n", __func__, ret);
7586 return ret;
fc01cea9
AA		 7587}
7588
fce5c838
RL		 7589struct nfs4_reclaim_complete_data {
7590 struct nfs_client *clp;
7591 struct nfs41_reclaim_complete_args arg;
7592 struct nfs41_reclaim_complete_res res;
7593};
7594
7595static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7596{
7597 struct nfs4_reclaim_complete_data *calldata = data;
7598
d9afbd1b
TM		 7599 nfs41_setup_sequence(calldata->clp->cl_session,
7600 &calldata->arg.seq_args,
7601 &calldata->res.seq_res,
7602 task);
fce5c838
RL		 7603}
7604
aa5190d0
TM		 7605static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7606{
7607 switch(task->tk_status) {
7608 case 0:
7609 case -NFS4ERR_COMPLETE_ALREADY:
7610 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7611 break;
7612 case -NFS4ERR_DELAY:
aa5190d0 7613 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7614 /* fall through */
7615 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7616 return -EAGAIN;
7617 default:
0400a6b0 7618 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7619 }
7620 return 0;
7621}
7622
fce5c838
RL		 7623static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7624{
7625 struct nfs4_reclaim_complete_data *calldata = data;
7626 struct nfs_client *clp = calldata->clp;
7627 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7628
7629 dprintk("--> %s\n", __func__);
14516c3a
TM		 7630 if (!nfs41_sequence_done(task, res))
7631 return;
fce5c838 7632
c6d01c6f 7633 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7634 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7635 rpc_restart_call_prepare(task);
7636 return;
7637 }
fce5c838
RL		 7638 dprintk("<-- %s\n", __func__);
7639}
7640
7641static void nfs4_free_reclaim_complete_data(void *data)
7642{
7643 struct nfs4_reclaim_complete_data *calldata = data;
7644
7645 kfree(calldata);
7646}
7647
7648static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7649 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7650 .rpc_call_done = nfs4_reclaim_complete_done,
7651 .rpc_release = nfs4_free_reclaim_complete_data,
7652};
7653
7654/*
7655 * Issue a global reclaim complete.
7656 */
965e9c23
TM		 7657static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7658 struct rpc_cred *cred)
fce5c838
RL		 7659{
7660 struct nfs4_reclaim_complete_data *calldata;
7661 struct rpc_task *task;
7662 struct rpc_message msg = {
7663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7664 .rpc_cred = cred,
fce5c838
RL		 7665 };
7666 struct rpc_task_setup task_setup_data = {
7667 .rpc_client = clp->cl_rpcclient,
7668 .rpc_message = &msg,
7669 .callback_ops = &nfs4_reclaim_complete_call_ops,
7670 .flags = RPC_TASK_ASYNC,
7671 };
7672 int status = -ENOMEM;
7673
7674 dprintk("--> %s\n", __func__);
8535b2be 7675 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7676 if (calldata == NULL)
7677 goto out;
7678 calldata->clp = clp;
7679 calldata->arg.one_fs = 0;
fce5c838 7680
a9c92d6b 7681 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7682 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7683 msg.rpc_argp = &calldata->arg;
7684 msg.rpc_resp = &calldata->res;
7685 task_setup_data.callback_data = calldata;
7686 task = rpc_run_task(&task_setup_data);
acf82b85 7687 if (IS_ERR(task)) {
fce5c838 7688 status = PTR_ERR(task);
acf82b85
DC		 7689 goto out;
7690 }
c34c32ea
AA		 7691 status = nfs4_wait_for_completion_rpc_task(task);
7692 if (status == 0)
7693 status = task->tk_status;
fce5c838 7694 rpc_put_task(task);
acf82b85 7695 return 0;
fce5c838
RL		 7696out:
7697 dprintk("<-- %s status=%d\n", __func__, status);
7698 return status;
7699}
b1f69b75
AA		 7700
7701static void
7702nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7703{
7704 struct nfs4_layoutget *lgp = calldata;
c31663d4 7705 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7706 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7707
7708 dprintk("--> %s\n", __func__);
c31663d4
FI		 7709 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7710 * right now covering the LAYOUTGET we are about to send.
7711 * However, that is not so catastrophic, and there seems
7712 * to be no way to prevent it completely.
7713 */
6ba7db34 7714 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7715 &lgp->res.seq_res, task))
b1f69b75 7716 return;
cf7d63f1
FI		 7717 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7718 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7719 &lgp->args.range,
cf7d63f1
FI		 7720 lgp->args.ctx->state)) {
7721 rpc_exit(task, NFS4_OK);
cf7d63f1 7722 }
b1f69b75
AA		 7723}
7724
7725static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7726{
7727 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7728 struct inode *inode = lgp->args.inode;
7729 struct nfs_server *server = NFS_SERVER(inode);
7730 struct pnfs_layout_hdr *lo;
7731 struct nfs4_state *state = NULL;
ed7e5423 7732 unsigned long timeo, now, giveup;
b1f69b75 7733
ed7e5423 7734 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7735
6ba7db34 7736 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7737 goto out;
b1f69b75
AA		 7738
7739 switch (task->tk_status) {
7740 case 0:
ee314c2a 7741 goto out;
ed7e5423
BH		 7742 /*
7743 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7744 * (or clients) writing to the same RAID stripe
7745 */
b1f69b75 7746 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7747 /*
7748 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7749 * existing layout before getting a new one).
7750 */
b1f69b75 7751 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7752 timeo = rpc_get_timeout(task->tk_client);
7753 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7754 now = jiffies;
7755 if (time_after(giveup, now)) {
7756 unsigned long delay;
7757
7758 /* Delay for:
7759 * - Not less then NFS4_POLL_RETRY_MIN.
7760 * - One last time a jiffie before we give up
7761 * - exponential backoff (time_now minus start_attempt)
7762 */
7763 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7764 min((giveup - now - 1),
7765 now - lgp->args.timestamp));
7766
7767 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7768 __func__, delay);
7769 rpc_delay(task, delay);
7770 task->tk_status = 0;
7771 rpc_restart_call_prepare(task);
7772 goto out; /* Do not call nfs4_async_handle_error() */
7773 }
ee314c2a
TM		 7774 break;
7775 case -NFS4ERR_EXPIRED:
7776 case -NFS4ERR_BAD_STATEID:
7777 spin_lock(&inode->i_lock);
7778 lo = NFS_I(inode)->layout;
7779 if (!lo || list_empty(&lo->plh_segs)) {
7780 spin_unlock(&inode->i_lock);
7781 /* If the open stateid was bad, then recover it. */
7782 state = lgp->args.ctx->state;
7783 } else {
7784 LIST_HEAD(head);
7785
defb8460
CH		 7786 /*
7787 * Mark the bad layout state as invalid, then retry
7788 * with the current stateid.
7789 */
ee314c2a
TM		 7790 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7791 spin_unlock(&inode->i_lock);
ee314c2a 7792 pnfs_free_lseg_list(&head);
defb8460
CH		 7793
7794 task->tk_status = 0;
7795 rpc_restart_call_prepare(task);
b1f69b75
AA		 7796 }
7797 }
8478eaa1 7798 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7799 rpc_restart_call_prepare(task);
7800out:
b1f69b75
AA		 7801 dprintk("<-- %s\n", __func__);
7802}
7803
8554116e
IK		 7804static size_t max_response_pages(struct nfs_server *server)
7805{
7806 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7807 return nfs_page_array_len(0, max_resp_sz);
7808}
7809
7810static void nfs4_free_pages(struct page **pages, size_t size)
7811{
7812 int i;
7813
7814 if (!pages)
7815 return;
7816
7817 for (i = 0; i < size; i++) {
7818 if (!pages[i])
7819 break;
7820 __free_page(pages[i]);
7821 }
7822 kfree(pages);
7823}
7824
7825static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7826{
7827 struct page **pages;
7828 int i;
7829
7830 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7831 if (!pages) {
7832 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7833 return NULL;
7834 }
7835
7836 for (i = 0; i < size; i++) {
7837 pages[i] = alloc_page(gfp_flags);
7838 if (!pages[i]) {
7839 dprintk("%s: failed to allocate page\n", __func__);
7840 nfs4_free_pages(pages, size);
7841 return NULL;
7842 }
7843 }
7844
7845 return pages;
7846}
7847
b1f69b75
AA		 7848static void nfs4_layoutget_release(void *calldata)
7849{
7850 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7851 struct inode *inode = lgp->args.inode;
7852 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7853 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7854
7855 dprintk("--> %s\n", __func__);
8554116e 7856 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7857 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7858 put_nfs_open_context(lgp->args.ctx);
7859 kfree(calldata);
7860 dprintk("<-- %s\n", __func__);
7861}
7862
7863static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7864 .rpc_call_prepare = nfs4_layoutget_prepare,
7865 .rpc_call_done = nfs4_layoutget_done,
7866 .rpc_release = nfs4_layoutget_release,
7867};
7868
a0b0a6e3
TM		 7869struct pnfs_layout_segment *
7870nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7871{
a47970ff
WAA		 7872 struct inode *inode = lgp->args.inode;
7873 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7874 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7875 struct rpc_task *task;
7876 struct rpc_message msg = {
7877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7878 .rpc_argp = &lgp->args,
7879 .rpc_resp = &lgp->res,
6ab59344 7880 .rpc_cred = lgp->cred,
b1f69b75
AA		 7881 };
7882 struct rpc_task_setup task_setup_data = {
7883 .rpc_client = server->client,
7884 .rpc_message = &msg,
7885 .callback_ops = &nfs4_layoutget_call_ops,
7886 .callback_data = lgp,
7887 .flags = RPC_TASK_ASYNC,
7888 };
a0b0a6e3 7889 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7890 int status = 0;
7891
7892 dprintk("--> %s\n", __func__);
7893
4bd5a980
PT		 7894 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7895 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7896
8554116e
IK		 7897 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7898 if (!lgp->args.layout.pages) {
7899 nfs4_layoutget_release(lgp);
a0b0a6e3 7900 return ERR_PTR(-ENOMEM);
8554116e
IK		 7901 }
7902 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7903 lgp->args.timestamp = jiffies;
8554116e 7904
35124a09 7905 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7906 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7907 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7908
b1f69b75
AA		 7909 task = rpc_run_task(&task_setup_data);
7910 if (IS_ERR(task))
a0b0a6e3 7911 return ERR_CAST(task);
b1f69b75 7912 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7913 if (status == 0)
7914 status = task->tk_status;
1037e6ea
TM		 7915 trace_nfs4_layoutget(lgp->args.ctx,
7916 &lgp->args.range,
7917 &lgp->res.range,
7918 status);
085b7a45
WAA		 7919 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7920 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7921 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7922 rpc_put_task(task);
7923 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7924 if (status)
7925 return ERR_PTR(status);
7926 return lseg;
b1f69b75
AA		 7927}
7928
cbe82603
BH		 7929static void
7930nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7931{
7932 struct nfs4_layoutreturn *lrp = calldata;
7933
7934 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7935 nfs41_setup_sequence(lrp->clp->cl_session,
7936 &lrp->args.seq_args,
7937 &lrp->res.seq_res,
7938 task);
cbe82603
BH		 7939}
7940
7941static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7942{
7943 struct nfs4_layoutreturn *lrp = calldata;
7944 struct nfs_server *server;
7945
7946 dprintk("--> %s\n", __func__);
7947
6ba7db34 7948 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7949 return;
7950
7951 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7952 switch (task->tk_status) {
7953 default:
7954 task->tk_status = 0;
7955 case 0:
7956 break;
7957 case -NFS4ERR_DELAY:
8478eaa1 7958 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7959 break;
d00c5d43 7960 rpc_restart_call_prepare(task);
cbe82603
BH		 7961 return;
7962 }
cbe82603
BH		 7963 dprintk("<-- %s\n", __func__);
7964}
7965
7966static void nfs4_layoutreturn_release(void *calldata)
7967{
7968 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7969 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 7970 LIST_HEAD(freeme);
cbe82603
BH		 7971
7972 dprintk("--> %s\n", __func__);
849b286f
TM		 7973 spin_lock(&lo->plh_inode->i_lock);
7974 if (lrp->res.lrs_present)
7975 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 7976 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 7977 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 7978 lo->plh_block_lgets--;
7979 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 7980 pnfs_free_lseg_list(&freeme);
70c3bd2b 7981 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7982 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7983 kfree(calldata);
7984 dprintk("<-- %s\n", __func__);
7985}
7986
7987static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7988 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7989 .rpc_call_done = nfs4_layoutreturn_done,
7990 .rpc_release = nfs4_layoutreturn_release,
7991};
7992
6c16605d 7993int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7994{
7995 struct rpc_task *task;
7996 struct rpc_message msg = {
7997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7998 .rpc_argp = &lrp->args,
7999 .rpc_resp = &lrp->res,
9556000d 8000 .rpc_cred = lrp->cred,
cbe82603
BH		 8001 };
8002 struct rpc_task_setup task_setup_data = {
1771c577 8003 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8004 .rpc_message = &msg,
8005 .callback_ops = &nfs4_layoutreturn_call_ops,
8006 .callback_data = lrp,
8007 };
6c16605d 8008 int status = 0;
cbe82603
BH		 8009
8010 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8011 if (!sync) {
8012 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8013 if (!lrp->inode) {
8014 nfs4_layoutreturn_release(lrp);
8015 return -EAGAIN;
8016 }
8017 task_setup_data.flags |= RPC_TASK_ASYNC;
8018 }
a9c92d6b 8019 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8020 task = rpc_run_task(&task_setup_data);
8021 if (IS_ERR(task))
8022 return PTR_ERR(task);
5a0ec8ac
TM		 8023 if (sync)
8024 status = task->tk_status;
1037e6ea 8025 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8026 dprintk("<-- %s status=%d\n", __func__, status);
8027 rpc_put_task(task);
8028 return status;
8029}
8030
b1f69b75 8031static int
cd5875fe
TM		 8032_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8033 struct pnfs_device *pdev,
8034 struct rpc_cred *cred)
b1f69b75
AA		 8035{
8036 struct nfs4_getdeviceinfo_args args = {
8037 .pdev = pdev,
4e590803
TM		 8038 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8039 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8040 };
8041 struct nfs4_getdeviceinfo_res res = {
8042 .pdev = pdev,
8043 };
8044 struct rpc_message msg = {
8045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8046 .rpc_argp = &args,
8047 .rpc_resp = &res,
cd5875fe 8048 .rpc_cred = cred,
b1f69b75
AA		 8049 };
8050 int status;
8051
8052 dprintk("--> %s\n", __func__);
7c513058 8053 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8054 if (res.notification & ~args.notify_types)
8055 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8056 if (res.notification != args.notify_types)
8057 pdev->nocache = 1;
4e590803 8058
b1f69b75
AA		 8059 dprintk("<-- %s status=%d\n", __func__, status);
8060
8061 return status;
8062}
8063
cd5875fe
TM		 8064int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8065 struct pnfs_device *pdev,
8066 struct rpc_cred *cred)
b1f69b75
AA		 8067{
8068 struct nfs4_exception exception = { };
8069 int err;
8070
8071 do {
8072 err = nfs4_handle_exception(server,
cd5875fe 8073 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8074 &exception);
8075 } while (exception.retry);
8076 return err;
8077}
8078EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8079
863a3c6c
AA		 8080static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8081{
8082 struct nfs4_layoutcommit_data *data = calldata;
8083 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8084 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8085
d9afbd1b
TM		 8086 nfs41_setup_sequence(session,
8087 &data->args.seq_args,
8088 &data->res.seq_res,
8089 task);
863a3c6c
AA		 8090}
8091
8092static void
8093nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8094{
8095 struct nfs4_layoutcommit_data *data = calldata;
8096 struct nfs_server *server = NFS_SERVER(data->args.inode);
8097
6ba7db34 8098 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8099 return;
8100
8101 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8102 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8103 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8104 case -NFS4ERR_BADLAYOUT: /* no layout */
8105 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8106 task->tk_status = 0;
e59d27e0 8107 case 0:
e59d27e0
TM		 8108 break;
8109 default:
8478eaa1 8110 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8111 rpc_restart_call_prepare(task);
8112 return;
8113 }
8114 }
863a3c6c
AA		 8115}
8116
8117static void nfs4_layoutcommit_release(void *calldata)
8118{
8119 struct nfs4_layoutcommit_data *data = calldata;
8120
db29c089 8121 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8122 nfs_post_op_update_inode_force_wcc(data->args.inode,
8123 data->res.fattr);
863a3c6c 8124 put_rpccred(data->cred);
472e2594 8125 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8126 kfree(data);
8127}
8128
8129static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8130 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8131 .rpc_call_done = nfs4_layoutcommit_done,
8132 .rpc_release = nfs4_layoutcommit_release,
8133};
8134
8135int
ef311537 8136nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8137{
8138 struct rpc_message msg = {
8139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8140 .rpc_argp = &data->args,
8141 .rpc_resp = &data->res,
8142 .rpc_cred = data->cred,
8143 };
8144 struct rpc_task_setup task_setup_data = {
8145 .task = &data->task,
8146 .rpc_client = NFS_CLIENT(data->args.inode),
8147 .rpc_message = &msg,
8148 .callback_ops = &nfs4_layoutcommit_ops,
8149 .callback_data = data,
863a3c6c
AA		 8150 };
8151 struct rpc_task *task;
8152 int status = 0;
8153
b4839ebe
KM		 8154 dprintk("NFS: initiating layoutcommit call. sync %d "
8155 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8156 data->args.lastbytewritten,
8157 data->args.inode->i_ino);
8158
472e2594
TM		 8159 if (!sync) {
8160 data->inode = nfs_igrab_and_active(data->args.inode);
8161 if (data->inode == NULL) {
8162 nfs4_layoutcommit_release(data);
8163 return -EAGAIN;
8164 }
8165 task_setup_data.flags = RPC_TASK_ASYNC;
8166 }
a9c92d6b 8167 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8168 task = rpc_run_task(&task_setup_data);
8169 if (IS_ERR(task))
8170 return PTR_ERR(task);
472e2594
TM		 8171 if (sync)
8172 status = task->tk_status;
1037e6ea 8173 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8174 dprintk("%s: status %d\n", __func__, status);
8175 rpc_put_task(task);
8176 return status;
8177}
fca78d6d 8178
97431204
AA		 8179/**
8180 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8181 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8182 */
fca78d6d
BS		 8183static int
8184_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8185 struct nfs_fsinfo *info,
8186 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8187{
8188 struct nfs41_secinfo_no_name_args args = {
8189 .style = SECINFO_STYLE_CURRENT_FH,
8190 };
8191 struct nfs4_secinfo_res res = {
8192 .flavors = flavors,
8193 };
8194 struct rpc_message msg = {
8195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8196 .rpc_argp = &args,
8197 .rpc_resp = &res,
8198 };
b1b3e136 8199 struct rpc_clnt *clnt = server->client;
7cb852df 8200 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8201 int status;
8202
8203 if (use_integrity) {
8204 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8205 cred = nfs4_get_clid_cred(server->nfs_client);
8206 msg.rpc_cred = cred;
b1b3e136
WAA		 8207 }
8208
8209 dprintk("--> %s\n", __func__);
8210 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8211 &res.seq_res, 0);
8212 dprintk("<-- %s status=%d\n", __func__, status);
8213
7cb852df
WAA		 8214 if (cred)
8215 put_rpccred(cred);
b1b3e136
WAA		 8216
8217 return status;
fca78d6d
BS		 8218}
8219
8220static int
8221nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8222 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8223{
8224 struct nfs4_exception exception = { };
8225 int err;
8226 do {
b1b3e136
WAA		 8227 /* first try using integrity protection */
8228 err = -NFS4ERR_WRONGSEC;
8229
8230 /* try to use integrity protection with machine cred */
8231 if (_nfs4_is_integrity_protected(server->nfs_client))
8232 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8233 flavors, true);
8234
8235 /*
8236 * if unable to use integrity protection, or SECINFO with
8237 * integrity protection returns NFS4ERR_WRONGSEC (which is
8238 * disallowed by spec, but exists in deployed servers) use
8239 * the current filesystem's rpc_client and the user cred.
8240 */
8241 if (err == -NFS4ERR_WRONGSEC)
8242 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8243 flavors, false);
8244
fca78d6d
BS		 8245 switch (err) {
8246 case 0:
8247 case -NFS4ERR_WRONGSEC:
78b19bae 8248 case -ENOTSUPP:
05e9cfb4 8249 goto out;
fca78d6d
BS		 8250 default:
8251 err = nfs4_handle_exception(server, err, &exception);
8252 }
8253 } while (exception.retry);
05e9cfb4 8254out:
fca78d6d
BS		 8255 return err;
8256}
8257
8258static int
8259nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8260 struct nfs_fsinfo *info)
8261{
8262 int err;
8263 struct page *page;
367156d9 8264 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8265 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8266 struct nfs4_secinfo4 *secinfo;
8267 int i;
fca78d6d
BS		 8268
8269 page = alloc_page(GFP_KERNEL);
8270 if (!page) {
8271 err = -ENOMEM;
8272 goto out;
8273 }
8274
8275 flavors = page_address(page);
8276 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8277
8278 /*
8279 * Fall back on "guess and check" method if
8280 * the server doesn't support SECINFO_NO_NAME
8281 */
78b19bae 8282 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8283 err = nfs4_find_root_sec(server, fhandle, info);
8284 goto out_freepage;
8285 }
8286 if (err)
8287 goto out_freepage;
8288
58a8cf12
WAA		 8289 for (i = 0; i < flavors->num_flavors; i++) {
8290 secinfo = &flavors->flavors[i];
8291
8292 switch (secinfo->flavor) {
8293 case RPC_AUTH_NULL:
8294 case RPC_AUTH_UNIX:
8295 case RPC_AUTH_GSS:
8296 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8297 &secinfo->flavor_info);
8298 break;
8299 default:
8300 flavor = RPC_AUTH_MAXFLAVOR;
8301 break;
8302 }
8303
4d4b69dd
WAA		 8304 if (!nfs_auth_info_match(&server->auth_info, flavor))
8305 flavor = RPC_AUTH_MAXFLAVOR;
8306
58a8cf12
WAA		 8307 if (flavor != RPC_AUTH_MAXFLAVOR) {
8308 err = nfs4_lookup_root_sec(server, fhandle,
8309 info, flavor);
8310 if (!err)
8311 break;
8312 }
8313 }
8314
8315 if (flavor == RPC_AUTH_MAXFLAVOR)
8316 err = -EPERM;
fca78d6d
BS		 8317
8318out_freepage:
8319 put_page(page);
8320 if (err == -EACCES)
8321 return -EPERM;
8322out:
8323 return err;
8324}
1cab0652 8325
ab7cb0df
TM		 8326static int _nfs41_test_stateid(struct nfs_server *server,
8327 nfs4_stateid *stateid,
8328 struct rpc_cred *cred)
7d974794
BS		 8329{
8330 int status;
8331 struct nfs41_test_stateid_args args = {
1cab0652 8332 .stateid = stateid,
7d974794
BS		 8333 };
8334 struct nfs41_test_stateid_res res;
8335 struct rpc_message msg = {
8336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8337 .rpc_argp = &args,
8338 .rpc_resp = &res,
ab7cb0df 8339 .rpc_cred = cred,
7d974794 8340 };
3787d506
WAA		 8341 struct rpc_clnt *rpc_client = server->client;
8342
8343 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8344 &rpc_client, &msg);
1cab0652 8345
38527b15 8346 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8347 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8348 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8349 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8350 &args.seq_args, &res.seq_res);
38527b15
CL		 8351 if (status != NFS_OK) {
8352 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8353 return status;
38527b15
CL		 8354 }
8355 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8356 return -res.status;
7d974794
BS		 8357}
8358
38527b15
CL		 8359/**
8360 * nfs41_test_stateid - perform a TEST_STATEID operation
8361 *
8362 * @server: server / transport on which to perform the operation
8363 * @stateid: state ID to test
ab7cb0df 8364 * @cred: credential
38527b15
CL		 8365 *
8366 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8367 * Otherwise a negative NFS4ERR value is returned if the operation
8368 * failed or the state ID is not currently valid.
8369 */
ab7cb0df
TM		 8370static int nfs41_test_stateid(struct nfs_server *server,
8371 nfs4_stateid *stateid,
8372 struct rpc_cred *cred)
7d974794
BS		 8373{
8374 struct nfs4_exception exception = { };
8375 int err;
8376 do {
ab7cb0df 8377 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8378 if (err != -NFS4ERR_DELAY)
8379 break;
8380 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8381 } while (exception.retry);
8382 return err;
8383}
9aeda35f 8384
7c1d5fae
TM		 8385struct nfs_free_stateid_data {
8386 struct nfs_server *server;
8387 struct nfs41_free_stateid_args args;
9aeda35f 8388 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8389};
8390
8391static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8392{
8393 struct nfs_free_stateid_data *data = calldata;
8394 nfs41_setup_sequence(nfs4_get_session(data->server),
8395 &data->args.seq_args,
8396 &data->res.seq_res,
8397 task);
8398}
8399
8400static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8401{
8402 struct nfs_free_stateid_data *data = calldata;
8403
8404 nfs41_sequence_done(task, &data->res.seq_res);
8405
8406 switch (task->tk_status) {
8407 case -NFS4ERR_DELAY:
8478eaa1 8408 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8409 rpc_restart_call_prepare(task);
8410 }
8411}
8412
8413static void nfs41_free_stateid_release(void *calldata)
8414{
8415 kfree(calldata);
8416}
8417
17f26b12 8418static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8419 .rpc_call_prepare = nfs41_free_stateid_prepare,
8420 .rpc_call_done = nfs41_free_stateid_done,
8421 .rpc_release = nfs41_free_stateid_release,
8422};
8423
8424static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8425 nfs4_stateid *stateid,
ab7cb0df 8426 struct rpc_cred *cred,
7c1d5fae
TM		 8427 bool privileged)
8428{
9aeda35f
BS		 8429 struct rpc_message msg = {
8430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8431 .rpc_cred = cred,
9aeda35f 8432 };
7c1d5fae
TM		 8433 struct rpc_task_setup task_setup = {
8434 .rpc_client = server->client,
8435 .rpc_message = &msg,
8436 .callback_ops = &nfs41_free_stateid_ops,
8437 .flags = RPC_TASK_ASYNC,
8438 };
8439 struct nfs_free_stateid_data *data;
9aeda35f 8440
3787d506
WAA		 8441 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8442 &task_setup.rpc_client, &msg);
8443
38527b15 8444 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8445 data = kmalloc(sizeof(*data), GFP_NOFS);
8446 if (!data)
8447 return ERR_PTR(-ENOMEM);
8448 data->server = server;
8449 nfs4_stateid_copy(&data->args.stateid, stateid);
8450
8451 task_setup.callback_data = data;
8452
8453 msg.rpc_argp = &data->args;
8454 msg.rpc_resp = &data->res;
a9c92d6b 8455 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8456 if (privileged)
8457 nfs4_set_sequence_privileged(&data->args.seq_args);
8458
8459 return rpc_run_task(&task_setup);
9aeda35f
BS		 8460}
8461
38527b15
CL		 8462/**
8463 * nfs41_free_stateid - perform a FREE_STATEID operation
8464 *
8465 * @server: server / transport on which to perform the operation
8466 * @stateid: state ID to release
ab7cb0df 8467 * @cred: credential
38527b15
CL		 8468 *
8469 * Returns NFS_OK if the server freed "stateid". Otherwise a
8470 * negative NFS4ERR value is returned.
8471 */
ab7cb0df
TM		 8472static int nfs41_free_stateid(struct nfs_server *server,
8473 nfs4_stateid *stateid,
8474 struct rpc_cred *cred)
9aeda35f 8475{
7c1d5fae
TM		 8476 struct rpc_task *task;
8477 int ret;
8478
ab7cb0df 8479 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8480 if (IS_ERR(task))
8481 return PTR_ERR(task);
8482 ret = rpc_wait_for_completion_task(task);
8483 if (!ret)
8484 ret = task->tk_status;
8485 rpc_put_task(task);
8486 return ret;
9aeda35f 8487}
36281caa 8488
f1cdae87
JL		 8489static void
8490nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8491{
8492 struct rpc_task *task;
ab7cb0df 8493 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8494
ab7cb0df 8495 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8496 nfs4_free_lock_state(server, lsp);
8497 if (IS_ERR(task))
f1cdae87 8498 return;
c8b2d0bf 8499 rpc_put_task(task);
c8b2d0bf
TM		 8500}
8501
36281caa
TM		 8502static bool nfs41_match_stateid(const nfs4_stateid *s1,
8503 const nfs4_stateid *s2)
8504{
2d2f24ad 8505 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8506 return false;
8507
2d2f24ad 8508 if (s1->seqid == s2->seqid)
36281caa 8509 return true;
2d2f24ad 8510 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8511 return true;
8512
8513 return false;
8514}
8515
557134a3
AA		 8516#endif /* CONFIG_NFS_V4_1 */
8517
36281caa
TM		 8518static bool nfs4_match_stateid(const nfs4_stateid *s1,
8519 const nfs4_stateid *s2)
8520{
f597c537 8521 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8522}
8523
8524
17280175 8525static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8526 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8527 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8528 .recover_open = nfs4_open_reclaim,
8529 .recover_lock = nfs4_lock_reclaim,
591d71cb 8530 .establish_clid = nfs4_init_clientid,
05f4c350 8531 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8532};
8533
591d71cb 8534#if defined(CONFIG_NFS_V4_1)
17280175 8535static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8536 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8537 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8538 .recover_open = nfs4_open_reclaim,
8539 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8540 .establish_clid = nfs41_init_clientid,
fce5c838 8541 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8542 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8543};
8544#endif /* CONFIG_NFS_V4_1 */
8545
17280175 8546static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8547 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8548 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8549 .recover_open = nfs40_open_expired,
591d71cb
AA		 8550 .recover_lock = nfs4_lock_expired,
8551 .establish_clid = nfs4_init_clientid,
8552};
8553
8554#if defined(CONFIG_NFS_V4_1)
17280175 8555static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8556 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8557 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8558 .recover_open = nfs41_open_expired,
8559 .recover_lock = nfs41_lock_expired,
4d643d1d 8560 .establish_clid = nfs41_init_clientid,
1da177e4 8561};
591d71cb 8562#endif /* CONFIG_NFS_V4_1 */
1da177e4 8563
17280175 8564static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8565 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8566 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8567 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8568};
8569
8570#if defined(CONFIG_NFS_V4_1)
17280175 8571static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8572 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8573 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8574 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8575};
8576#endif
8577
ec011fe8 8578static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8579 .get_locations = _nfs40_proc_get_locations,
44c99933 8580 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8581};
8582
8583#if defined(CONFIG_NFS_V4_1)
8584static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8585 .get_locations = _nfs41_proc_get_locations,
44c99933 8586 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8587};
8588#endif /* CONFIG_NFS_V4_1 */
8589
97dc1359
TM		 8590static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8591 .minor_version = 0,
39c6daae
TM		 8592 .init_caps = NFS_CAP_READDIRPLUS
8593 | NFS_CAP_ATOMIC_OPEN
39c6daae 8594 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8595 .init_client = nfs40_init_client,
8596 .shutdown_client = nfs40_shutdown_client,
36281caa 8597 .match_stateid = nfs4_match_stateid,
fca78d6d 8598 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8599 .free_lock_state = nfs4_release_lockowner,
63f5f796 8600 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8601 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8602 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8603 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8604 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8605 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8606};
8607
8608#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8609static struct nfs_seqid *
8610nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8611{
8612 return NULL;
8613}
8614
97dc1359
TM		 8615static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8616 .minor_version = 1,
39c6daae
TM		 8617 .init_caps = NFS_CAP_READDIRPLUS
8618 | NFS_CAP_ATOMIC_OPEN
3b66486c 8619 | NFS_CAP_POSIX_LOCK
49f9a0fa 8620 | NFS_CAP_STATEID_NFSV41
e983120e 8621 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8622 .init_client = nfs41_init_client,
8623 .shutdown_client = nfs41_shutdown_client,
36281caa 8624 .match_stateid = nfs41_match_stateid,
fca78d6d 8625 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8626 .free_lock_state = nfs41_free_lock_state,
63f5f796 8627 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8628 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8629 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8630 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8631 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8632 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8633};
8634#endif
8635
42c2c424
SD		 8636#if defined(CONFIG_NFS_V4_2)
8637static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8638 .minor_version = 2,
7017310a
BS		 8639 .init_caps = NFS_CAP_READDIRPLUS
8640 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8641 | NFS_CAP_POSIX_LOCK
8642 | NFS_CAP_STATEID_NFSV41
e983120e 8643 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8644 | NFS_CAP_ALLOCATE
624bd5b7 8645 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8646 | NFS_CAP_SEEK
8647 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8648 .init_client = nfs41_init_client,
8649 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8650 .match_stateid = nfs41_match_stateid,
8651 .find_root_sec = nfs41_find_root_sec,
7017310a 8652 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8653 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8654 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8655 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8656 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8657 .state_renewal_ops = &nfs41_state_renewal_ops,
8658};
8659#endif
8660
97dc1359
TM		 8661const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8662 [0] = &nfs_v4_0_minor_ops,
8663#if defined(CONFIG_NFS_V4_1)
8664 [1] = &nfs_v4_1_minor_ops,
8665#endif
42c2c424
SD		 8666#if defined(CONFIG_NFS_V4_2)
8667 [2] = &nfs_v4_2_minor_ops,
8668#endif
97dc1359
TM		 8669};
8670
17f26b12 8671static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8672 .create = nfs_create,
8673 .lookup = nfs_lookup,
8674 .atomic_open = nfs_atomic_open,
8675 .link = nfs_link,
8676 .unlink = nfs_unlink,
8677 .symlink = nfs_symlink,
8678 .mkdir = nfs_mkdir,
8679 .rmdir = nfs_rmdir,
8680 .mknod = nfs_mknod,
8681 .rename = nfs_rename,
8682 .permission = nfs_permission,
8683 .getattr = nfs_getattr,
8684 .setattr = nfs_setattr,
8685 .getxattr = generic_getxattr,
8686 .setxattr = generic_setxattr,
8687 .listxattr = generic_listxattr,
8688 .removexattr = generic_removexattr,
8689};
8690
92e1d5be 8691static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8692 .permission = nfs_permission,
8693 .getattr = nfs_getattr,
8694 .setattr = nfs_setattr,
64c2ce8b
AK		 8695 .getxattr = generic_getxattr,
8696 .setxattr = generic_setxattr,
8697 .listxattr = generic_listxattr,
8698 .removexattr = generic_removexattr,
6b3b5496
BF		 8699};
8700
509de811 8701const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8702 .version = 4, /* protocol version */
8703 .dentry_ops = &nfs4_dentry_operations,
8704 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8705 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8706 .file_ops = &nfs4_file_operations,
1da177e4 8707 .getroot = nfs4_proc_get_root,
281cad46 8708 .submount = nfs4_submount,
ff9099f2 8709 .try_mount = nfs4_try_mount,
1da177e4
LT		 8710 .getattr = nfs4_proc_getattr,
8711 .setattr = nfs4_proc_setattr,
8712 .lookup = nfs4_proc_lookup,
8713 .access = nfs4_proc_access,
8714 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8715 .create = nfs4_proc_create,
8716 .remove = nfs4_proc_remove,
8717 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8718 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8719 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8720 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8721 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8722 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8723 .link = nfs4_proc_link,
8724 .symlink = nfs4_proc_symlink,
8725 .mkdir = nfs4_proc_mkdir,
8726 .rmdir = nfs4_proc_remove,
8727 .readdir = nfs4_proc_readdir,
8728 .mknod = nfs4_proc_mknod,
8729 .statfs = nfs4_proc_statfs,
8730 .fsinfo = nfs4_proc_fsinfo,
8731 .pathconf = nfs4_proc_pathconf,
e9326dca 8732 .set_capabilities = nfs4_server_capabilities,
1da177e4 8733 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8734 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8735 .read_setup = nfs4_proc_read_setup,
ec06c096 8736 .read_done = nfs4_read_done,
1da177e4 8737 .write_setup = nfs4_proc_write_setup,
788e7a89 8738 .write_done = nfs4_write_done,
1da177e4 8739 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8740 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8741 .commit_done = nfs4_commit_done,
1da177e4 8742 .lock = nfs4_proc_lock,
e50a1c2e 8743 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8744 .close_context = nfs4_close_context,
2b484297 8745 .open_context = nfs4_atomic_open,
011e2a7f 8746 .have_delegation = nfs4_have_delegation,
57ec14c5 8747 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8748 .alloc_client = nfs4_alloc_client,
45a52a02 8749 .init_client = nfs4_init_client,
cdb7eced 8750 .free_client = nfs4_free_client,
1179acc6
BS		 8751 .create_server = nfs4_create_server,
8752 .clone_server = nfs_clone_server,
1da177e4
LT		 8753};
8754
64c2ce8b
AK		 8755static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8756 .prefix = XATTR_NAME_NFSV4_ACL,
8757 .list = nfs4_xattr_list_nfs4_acl,
8758 .get = nfs4_xattr_get_nfs4_acl,
8759 .set = nfs4_xattr_set_nfs4_acl,
8760};
8761
8762const struct xattr_handler *nfs4_xattr_handlers[] = {
8763 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8764#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8765 &nfs4_xattr_nfs4_label_handler,
8766#endif
64c2ce8b
AK		 8767 NULL
8768};
8769
1da177e4
LT		 8770/*
8771 * Local variables:
8772 * c-basic-offset: 8
8773 * End:
8774 */
Linux 6.x block layer and io_uring tree(s)