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NFS: Add basic migration support to state manager thread
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315 154 case -NFS4ERR_WRONGSEC:
8897538e 155 case -NFS4ERR_WRONG_CRED:
7ebb9315 156 return -EPERM;
3ddeb7c5
TM		 157 case -NFS4ERR_BADOWNER:
158 case -NFS4ERR_BADNAME:
159 return -EINVAL;
fb13bfa7
TM		 160 case -NFS4ERR_SHARE_DENIED:
161 return -EACCES;
f25efd85
SD		 162 case -NFS4ERR_MINOR_VERS_MISMATCH:
163 return -EPROTONOSUPPORT;
6168f62c
WAA		 164 case -NFS4ERR_ACCESS:
165 return -EACCES;
6e3cf241
TM		 166 case -NFS4ERR_FILE_OPEN:
167 return -EBUSY;
52567b03 168 default:
1da177e4 169 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 170 __func__, -err);
52567b03 171 break;
1da177e4 172 }
52567b03 173 return -EIO;
1da177e4
LT		 174}
175
176/*
177 * This is our standard bitmap for GETATTR requests.
178 */
1549210f 179const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID,
185 FATTR4_WORD1_MODE
186 | FATTR4_WORD1_NUMLINKS
187 | FATTR4_WORD1_OWNER
188 | FATTR4_WORD1_OWNER_GROUP
189 | FATTR4_WORD1_RAWDEV
190 | FATTR4_WORD1_SPACE_USED
191 | FATTR4_WORD1_TIME_ACCESS
192 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 193 | FATTR4_WORD1_TIME_MODIFY,
194#ifdef CONFIG_NFS_V4_SECURITY_LABEL
195 FATTR4_WORD2_SECURITY_LABEL
196#endif
1da177e4
LT		 197};
198
1549210f
TM		 199static const u32 nfs4_pnfs_open_bitmap[3] = {
200 FATTR4_WORD0_TYPE
201 | FATTR4_WORD0_CHANGE
202 | FATTR4_WORD0_SIZE
203 | FATTR4_WORD0_FSID
204 | FATTR4_WORD0_FILEID,
205 FATTR4_WORD1_MODE
206 | FATTR4_WORD1_NUMLINKS
207 | FATTR4_WORD1_OWNER
208 | FATTR4_WORD1_OWNER_GROUP
209 | FATTR4_WORD1_RAWDEV
210 | FATTR4_WORD1_SPACE_USED
211 | FATTR4_WORD1_TIME_ACCESS
212 | FATTR4_WORD1_TIME_METADATA
213 | FATTR4_WORD1_TIME_MODIFY,
214 FATTR4_WORD2_MDSTHRESHOLD
215};
216
e23008ec
AA		 217static const u32 nfs4_open_noattr_bitmap[3] = {
218 FATTR4_WORD0_TYPE
219 | FATTR4_WORD0_CHANGE
220 | FATTR4_WORD0_FILEID,
221};
222
a09df2ca 223const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 224 FATTR4_WORD0_FILES_AVAIL
225 | FATTR4_WORD0_FILES_FREE
226 | FATTR4_WORD0_FILES_TOTAL,
227 FATTR4_WORD1_SPACE_AVAIL
228 | FATTR4_WORD1_SPACE_FREE
229 | FATTR4_WORD1_SPACE_TOTAL
230};
231
a09df2ca 232const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 233 FATTR4_WORD0_MAXLINK
234 | FATTR4_WORD0_MAXNAME,
235 0
236};
237
dae100c2 238const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 239 | FATTR4_WORD0_MAXREAD
240 | FATTR4_WORD0_MAXWRITE
241 | FATTR4_WORD0_LEASE_TIME,
55b6e774 242 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 243 | FATTR4_WORD1_FS_LAYOUT_TYPES,
244 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 245};
246
a09df2ca 247const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 264};
265
bc4785cd 266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 267 struct nfs4_readdir_arg *readdir)
268{
0dbb4c67 269 __be32 *start, *p;
1da177e4 270
1da177e4 271 if (cookie > 2) {
b7ef1956 272 readdir->cookie = cookie;
1da177e4
LT		 273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
2b86ce2d 289 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
4e769b93 301 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
4e769b93 313 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
2b86ce2d 317 kunmap_atomic(start);
1da177e4
LT		 318}
319
65de872e
TM		 320static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
321{
322 int res = 0;
323
324 might_sleep();
325
326 if (*timeout <= 0)
327 *timeout = NFS4_POLL_RETRY_MIN;
328 if (*timeout > NFS4_POLL_RETRY_MAX)
329 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 330 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 331 if (fatal_signal_pending(current))
332 res = -ERESTARTSYS;
333 *timeout <<= 1;
334 return res;
335}
336
337/* This is the error handling routine for processes that are allowed
338 * to sleep.
339 */
b064eca2 340static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 341{
342 struct nfs_client *clp = server->nfs_client;
9e33bed5 343 struct nfs4_state *state = exception->state;
3114ea7a 344 struct inode *inode = exception->inode;
65de872e
TM		 345 int ret = errorcode;
346
347 exception->retry = 0;
348 switch(errorcode) {
349 case 0:
350 return 0;
3114ea7a 351 case -NFS4ERR_OPENMODE:
011e2a7f 352 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 353 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 354 exception->retry = 1;
355 return 0;
356 }
357 if (state == NULL)
358 break;
5d422301
TM		 359 ret = nfs4_schedule_stateid_recovery(server, state);
360 if (ret < 0)
361 break;
3114ea7a 362 goto wait_on_recovery;
a1d0b5ee 363 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 364 case -NFS4ERR_ADMIN_REVOKED:
365 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 366 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
367 nfs_remove_bad_delegation(inode);
368 exception->retry = 1;
369 break;
370 }
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
03391693 387#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 388 case -NFS4ERR_BADSESSION:
389 case -NFS4ERR_BADSLOT:
390 case -NFS4ERR_BAD_HIGH_SLOT:
391 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
392 case -NFS4ERR_DEADSESSION:
393 case -NFS4ERR_SEQ_FALSE_RETRY:
394 case -NFS4ERR_SEQ_MISORDERED:
395 dprintk("%s ERROR: %d Reset session\n", __func__,
396 errorcode);
9f594791 397 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 398 goto wait_on_recovery;
03391693 399#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 400 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 401 if (exception->timeout > HZ) {
402 /* We have retried a decent amount, time to
403 * fail
404 */
405 ret = -EBUSY;
406 break;
407 }
65de872e
TM		 408 case -NFS4ERR_GRACE:
409 case -NFS4ERR_DELAY:
410 ret = nfs4_delay(server->client, &exception->timeout);
411 if (ret != 0)
412 break;
a8a4ae3a 413 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 414 case -NFS4ERR_OLD_STATEID:
415 exception->retry = 1;
b064eca2
TM		 416 break;
417 case -NFS4ERR_BADOWNER:
418 /* The following works around a Linux server bug! */
419 case -NFS4ERR_BADNAME:
420 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
421 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
422 exception->retry = 1;
423 printk(KERN_WARNING "NFS: v4 server %s "
424 "does not accept raw "
425 "uid/gids. "
426 "Reenabling the idmapper.\n",
427 server->nfs_client->cl_hostname);
428 }
65de872e
TM		 429 }
430 /* We failed to handle the error */
431 return nfs4_map_errors(ret);
0400a6b0 432wait_on_recovery:
a2c0b9e2
TM		 433 ret = nfs4_wait_clnt_recover(clp);
434 if (ret == 0)
435 exception->retry = 1;
436 return ret;
65de872e
TM		 437}
438
a5250def
WAA		 439/*
440 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
441 * or 'false' otherwise.
442 */
443static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
444{
445 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
446
447 if (flavor == RPC_AUTH_GSS_KRB5I ||
448 flavor == RPC_AUTH_GSS_KRB5P)
449 return true;
450
451 return false;
452}
65de872e 453
452e9352 454static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 455{
1da177e4
LT		 456 spin_lock(&clp->cl_lock);
457 if (time_before(clp->cl_last_renewal,timestamp))
458 clp->cl_last_renewal = timestamp;
459 spin_unlock(&clp->cl_lock);
460}
461
452e9352
TM		 462static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
463{
464 do_renew_lease(server->nfs_client, timestamp);
465}
466
2a3eb2b9
CL		 467struct nfs4_call_sync_data {
468 const struct nfs_server *seq_server;
469 struct nfs4_sequence_args *seq_args;
470 struct nfs4_sequence_res *seq_res;
471};
472
a9c92d6b
CL		 473static void nfs4_init_sequence(struct nfs4_sequence_args *args,
474 struct nfs4_sequence_res *res, int cache_reply)
475{
476 args->sa_slot = NULL;
477 args->sa_cache_this = cache_reply;
478 args->sa_privileged = 0;
479
480 res->sr_slot = NULL;
481}
482
483static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
484{
485 args->sa_privileged = 1;
486}
487
3bd2384a
CL		 488static int nfs40_setup_sequence(const struct nfs_server *server,
489 struct nfs4_sequence_args *args,
490 struct nfs4_sequence_res *res,
491 struct rpc_task *task)
492{
493 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
494 struct nfs4_slot *slot;
495
496 /* slot already allocated? */
497 if (res->sr_slot != NULL)
498 goto out_start;
499
500 spin_lock(&tbl->slot_tbl_lock);
501 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
502 goto out_sleep;
503
504 slot = nfs4_alloc_slot(tbl);
505 if (IS_ERR(slot)) {
506 if (slot == ERR_PTR(-ENOMEM))
507 task->tk_timeout = HZ >> 2;
508 goto out_sleep;
509 }
510 spin_unlock(&tbl->slot_tbl_lock);
511
512 args->sa_slot = slot;
513 res->sr_slot = slot;
514
515out_start:
516 rpc_call_start(task);
517 return 0;
518
519out_sleep:
520 if (args->sa_privileged)
521 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
522 NULL, RPC_PRIORITY_PRIVILEGED);
523 else
524 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
525 spin_unlock(&tbl->slot_tbl_lock);
526 return -EAGAIN;
527}
528
529static int nfs40_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
531{
532 struct nfs4_slot *slot = res->sr_slot;
533 struct nfs4_slot_table *tbl;
534
535 if (!RPC_WAS_SENT(task))
536 goto out;
537
538 tbl = slot->table;
539 spin_lock(&tbl->slot_tbl_lock);
540 if (!nfs41_wake_and_assign_slot(tbl, slot))
541 nfs4_free_slot(tbl, slot);
542 spin_unlock(&tbl->slot_tbl_lock);
543
544 res->sr_slot = NULL;
545out:
546 return 1;
547}
548
cccef3b9
AA		 549#if defined(CONFIG_NFS_V4_1)
550
d185a334 551static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 552{
e3725ec0 553 struct nfs4_session *session;
13615871 554 struct nfs4_slot_table *tbl;
c10e4498 555 bool send_new_highest_used_slotid = false;
13615871 556
dfb4f309 557 if (!res->sr_slot) {
13615871
AA		 558 /* just wake up the next guy waiting since
559 * we may have not consumed a slot after all */
691daf3b 560 dprintk("%s: No slot\n", __func__);
35dc1d74 561 return;
13615871 562 }
e3725ec0
TM		 563 tbl = res->sr_slot->table;
564 session = tbl->session;
ea028ac9 565
35dc1d74 566 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 567 /* Be nice to the server: try to ensure that the last transmitted
568 * value for highest_user_slotid <= target_highest_slotid
569 */
570 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
571 send_new_highest_used_slotid = true;
572
b75ad4cd
TM		 573 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
574 send_new_highest_used_slotid = false;
575 goto out_unlock;
576 }
f4af6e2a 577 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 578
579 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
580 send_new_highest_used_slotid = false;
b75ad4cd 581out_unlock:
35dc1d74 582 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 583 res->sr_slot = NULL;
c10e4498
TM		 584 if (send_new_highest_used_slotid)
585 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 586}
587
14516c3a 588static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 589{
e3725ec0 590 struct nfs4_session *session;
933602e3 591 struct nfs4_slot *slot;
14516c3a 592 struct nfs_client *clp;
ac20d163 593 bool interrupted = false;
85563073 594 int ret = 1;
b0df806c 595
468f8613
BS		 596 /* don't increment the sequence number if the task wasn't sent */
597 if (!RPC_WAS_SENT(task))
b0df806c
AA		 598 goto out;
599
933602e3 600 slot = res->sr_slot;
e3725ec0 601 session = slot->table->session;
933602e3 602
ac20d163
TM		 603 if (slot->interrupted) {
604 slot->interrupted = 0;
605 interrupted = true;
606 }
607
2f92ae34 608 trace_nfs4_sequence_done(session, res);
691daf3b 609 /* Check the SEQUENCE operation status */
14516c3a
TM		 610 switch (res->sr_status) {
611 case 0:
b0df806c 612 /* Update the slot's sequence and clientid lease timer */
933602e3 613 ++slot->seq_nr;
e3725ec0 614 clp = session->clp;
8e63b6a8 615 do_renew_lease(clp, res->sr_timestamp);
0629e370 616 /* Check sequence flags */
b4410c2f
TM		 617 if (res->sr_status_flags != 0)
618 nfs4_schedule_lease_recovery(clp);
464ee9f9 619 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 620 break;
ac20d163
TM		 621 case 1:
622 /*
623 * sr_status remains 1 if an RPC level error occurred.
624 * The server may or may not have processed the sequence
625 * operation..
626 * Mark the slot as having hosted an interrupted RPC call.
627 */
628 slot->interrupted = 1;
629 goto out;
14516c3a
TM		 630 case -NFS4ERR_DELAY:
631 /* The server detected a resend of the RPC call and
632 * returned NFS4ERR_DELAY as per Section 2.10.6.2
633 * of RFC5661.
634 */
df2fabff 635 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 636 __func__,
df2fabff 637 slot->slot_nr,
933602e3 638 slot->seq_nr);
14516c3a 639 goto out_retry;
85563073
TM		 640 case -NFS4ERR_BADSLOT:
641 /*
642 * The slot id we used was probably retired. Try again
643 * using a different slot id.
644 */
e8794440
TM		 645 goto retry_nowait;
646 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 647 /*
648 * Was the last operation on this sequence interrupted?
649 * If so, retry after bumping the sequence number.
650 */
651 if (interrupted) {
652 ++slot->seq_nr;
653 goto retry_nowait;
654 }
e8794440
TM		 655 /*
656 * Could this slot have been previously retired?
657 * If so, then the server may be expecting seq_nr = 1!
658 */
8e63b6a8
TM		 659 if (slot->seq_nr != 1) {
660 slot->seq_nr = 1;
661 goto retry_nowait;
662 }
663 break;
e8794440
TM		 664 case -NFS4ERR_SEQ_FALSE_RETRY:
665 ++slot->seq_nr;
666 goto retry_nowait;
14516c3a
TM		 667 default:
668 /* Just update the slot sequence no. */
933602e3 669 ++slot->seq_nr;
b0df806c
AA		 670 }
671out:
672 /* The session may be reset by one of the error handlers. */
673 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 674 nfs41_sequence_free_slot(res);
85563073 675 return ret;
e8794440
TM		 676retry_nowait:
677 if (rpc_restart_call_prepare(task)) {
678 task->tk_status = 0;
679 ret = 0;
680 }
681 goto out;
14516c3a 682out_retry:
d05dd4e9 683 if (!rpc_restart_call(task))
14516c3a
TM		 684 goto out;
685 rpc_delay(task, NFS4_POLL_RETRY_MAX);
686 return 0;
b0df806c
AA		 687}
688
14516c3a
TM		 689static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
df896455 691{
e3725ec0 692 if (res->sr_slot == NULL)
14516c3a 693 return 1;
3bd2384a
CL		 694 if (!res->sr_slot->table->session)
695 return nfs40_sequence_done(task, res);
14516c3a 696 return nfs41_sequence_done(task, res);
df896455
TM		 697}
698
dc70d7b3 699int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 700 struct nfs4_sequence_args *args,
701 struct nfs4_sequence_res *res,
ce5039c1
AA		 702 struct rpc_task *task)
703{
fbcd4abc
AA		 704 struct nfs4_slot *slot;
705 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 706
707 dprintk("--> %s\n", __func__);
ce5039c1 708 /* slot already allocated? */
dfb4f309 709 if (res->sr_slot != NULL)
d9afbd1b 710 goto out_success;
ce5039c1 711
fbcd4abc
AA		 712 tbl = &session->fc_slot_table;
713
69d206b5
TM		 714 task->tk_timeout = 0;
715
fbcd4abc 716 spin_lock(&tbl->slot_tbl_lock);
774d5f14 717 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 718 !args->sa_privileged) {
0b1c8fc4 719 /* The state manager will wait until the slot table is empty */
0b1c8fc4 720 dprintk("%s session is draining\n", __func__);
7b939a3f 721 goto out_sleep;
689cf5c1
AB		 722 }
723
2dc03b7f 724 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 725 if (IS_ERR(slot)) {
726 /* If out of memory, try again in 1/4 second */
727 if (slot == ERR_PTR(-ENOMEM))
728 task->tk_timeout = HZ >> 2;
fbcd4abc 729 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 730 goto out_sleep;
fbcd4abc
AA		 731 }
732 spin_unlock(&tbl->slot_tbl_lock);
733
2b2fa717 734 args->sa_slot = slot;
fbcd4abc 735
e8d92382 736 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 737 slot->slot_nr, slot->seq_nr);
fbcd4abc 738
dfb4f309 739 res->sr_slot = slot;
8e63b6a8 740 res->sr_timestamp = jiffies;
2a6e26cd 741 res->sr_status_flags = 0;
fbcd4abc
AA		 742 /*
743 * sr_status is only set in decode_sequence, and so will remain
744 * set to 1 if an rpc level failure occurs.
745 */
746 res->sr_status = 1;
2f92ae34 747 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 748out_success:
749 rpc_call_start(task);
ce5039c1 750 return 0;
7b939a3f 751out_sleep:
8fe72bac
TM		 752 /* Privileged tasks are queued with top priority */
753 if (args->sa_privileged)
1e1093c7
TM		 754 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
755 NULL, RPC_PRIORITY_PRIVILEGED);
756 else
757 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 758 spin_unlock(&tbl->slot_tbl_lock);
759 return -EAGAIN;
ce5039c1 760}
dc70d7b3 761EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 762
5a580e0a
CL		 763static int nfs4_setup_sequence(const struct nfs_server *server,
764 struct nfs4_sequence_args *args,
765 struct nfs4_sequence_res *res,
766 struct rpc_task *task)
ce5039c1 767{
035168ab 768 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 769 int ret = 0;
770
3bd2384a
CL		 771 if (!session)
772 return nfs40_setup_sequence(server, args, res, task);
035168ab 773
e8d92382 774 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 775 __func__, session->clp, session, res->sr_slot ?
e8d92382 776 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 777
9d12b216 778 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 779
ce5039c1
AA		 780 dprintk("<-- %s status=%d\n", __func__, ret);
781 return ret;
782}
783
ce5039c1
AA		 784static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
785{
2a3eb2b9 786 struct nfs4_call_sync_data *data = calldata;
6ba7db34 787 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 788
035168ab
TM		 789 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
790
d9afbd1b 791 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 792}
793
69ab40c4
AA		 794static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
795{
2a3eb2b9 796 struct nfs4_call_sync_data *data = calldata;
69ab40c4 797
14516c3a 798 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 799}
800
17280175 801static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 802 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 803 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 804};
805
3bd2384a
CL		 806#else /* !CONFIG_NFS_V4_1 */
807
9915ea7e
CL		 808static int nfs4_setup_sequence(const struct nfs_server *server,
809 struct nfs4_sequence_args *args,
810 struct nfs4_sequence_res *res,
811 struct rpc_task *task)
812{
3bd2384a 813 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 814}
815
816static int nfs4_sequence_done(struct rpc_task *task,
817 struct nfs4_sequence_res *res)
818{
3bd2384a 819 return nfs40_sequence_done(task, res);
9915ea7e 820}
3bd2384a
CL		 821
822#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 823
824static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
825{
826 struct nfs4_call_sync_data *data = calldata;
827 nfs4_setup_sequence(data->seq_server,
828 data->seq_args, data->seq_res, task);
829}
830
831static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_sequence_done(task, data->seq_res);
835}
836
837static const struct rpc_call_ops nfs40_call_sync_ops = {
838 .rpc_call_prepare = nfs40_call_sync_prepare,
839 .rpc_call_done = nfs40_call_sync_done,
840};
841
7c513058
BS		 842static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
843 struct nfs_server *server,
ce5039c1
AA		 844 struct rpc_message *msg,
845 struct nfs4_sequence_args *args,
8fe72bac 846 struct nfs4_sequence_res *res)
ce5039c1
AA		 847{
848 int ret;
849 struct rpc_task *task;
9915ea7e 850 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 851 struct nfs4_call_sync_data data = {
035168ab 852 .seq_server = server,
ce5039c1
AA		 853 .seq_args = args,
854 .seq_res = res,
ce5039c1
AA		 855 };
856 struct rpc_task_setup task_setup = {
7c513058 857 .rpc_client = clnt,
ce5039c1 858 .rpc_message = msg,
9915ea7e 859 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 860 .callback_data = &data
861 };
862
ce5039c1
AA		 863 task = rpc_run_task(&task_setup);
864 if (IS_ERR(task))
865 ret = PTR_ERR(task);
866 else {
867 ret = task->tk_status;
868 rpc_put_task(task);
869 }
870 return ret;
871}
872
fd0c0953 873static
7c513058
BS		 874int nfs4_call_sync(struct rpc_clnt *clnt,
875 struct nfs_server *server,
e73b83f2
BS		 876 struct rpc_message *msg,
877 struct nfs4_sequence_args *args,
878 struct nfs4_sequence_res *res,
879 int cache_reply)
880{
a9c92d6b 881 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 882 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 883}
cccef3b9 884
38478b24 885static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 886{
38478b24 887 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 888
38478b24 889 spin_lock(&dir->i_lock);
359d7d1c 890 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 891 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 892 nfs_force_lookup_revalidate(dir);
a9a4a87a 893 dir->i_version = cinfo->after;
de242c0b 894 nfs_fscache_invalidate(dir);
38478b24 895 spin_unlock(&dir->i_lock);
1da177e4
LT		 896}
897
e56e0b78 898struct nfs4_opendata {
c6d00e63 899 struct kref kref;
e56e0b78
TM		 900 struct nfs_openargs o_arg;
901 struct nfs_openres o_res;
cdd4e68b
TM		 902 struct nfs_open_confirmargs c_arg;
903 struct nfs_open_confirmres c_res;
6926afd1
TM		 904 struct nfs4_string owner_name;
905 struct nfs4_string group_name;
e56e0b78 906 struct nfs_fattr f_attr;
1775fd3e 907 struct nfs4_label *f_label;
e56e0b78 908 struct dentry *dir;
82a2c1b7 909 struct dentry *dentry;
e56e0b78 910 struct nfs4_state_owner *owner;
aac00a8d 911 struct nfs4_state *state;
e56e0b78 912 struct iattr attrs;
26e976a8 913 unsigned long timestamp;
3e309914 914 unsigned int rpc_done : 1;
5bc2afc2 915 unsigned int file_created : 1;
bdeca1b7 916 unsigned int is_recover : 1;
24ac23ab
TM		 917 int rpc_status;
918 int cancelled;
e56e0b78
TM		 919};
920
49f9a0fa
TM		 921static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
922 int err, struct nfs4_exception *exception)
923{
924 if (err != -EINVAL)
925 return false;
926 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
927 return false;
928 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
929 exception->retry = 1;
930 return true;
931}
932
933static enum open_claim_type4
934nfs4_map_atomic_open_claim(struct nfs_server *server,
935 enum open_claim_type4 claim)
936{
937 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
938 return claim;
939 switch (claim) {
940 default:
941 return claim;
942 case NFS4_OPEN_CLAIM_FH:
943 return NFS4_OPEN_CLAIM_NULL;
944 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
945 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
946 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
947 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
948 }
949}
2ced46c2
TM		 950
951static void nfs4_init_opendata_res(struct nfs4_opendata *p)
952{
953 p->o_res.f_attr = &p->f_attr;
1775fd3e 954 p->o_res.f_label = p->f_label;
c1d51931
TM		 955 p->o_res.seqid = p->o_arg.seqid;
956 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 957 p->o_res.server = p->o_arg.server;
5f657530 958 p->o_res.access_request = p->o_arg.access;
2ced46c2 959 nfs_fattr_init(&p->f_attr);
6926afd1 960 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 961}
962
82a2c1b7 963static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 964 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 965 const struct iattr *attrs,
1775fd3e 966 struct nfs4_label *label,
4a1c0893 967 enum open_claim_type4 claim,
8535b2be 968 gfp_t gfp_mask)
e56e0b78 969{
82a2c1b7 970 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 971 struct inode *dir = parent->d_inode;
972 struct nfs_server *server = NFS_SERVER(dir);
973 struct nfs4_opendata *p;
974
8535b2be 975 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 976 if (p == NULL)
977 goto err;
14c43f76
DQ		 978
979 p->f_label = nfs4_label_alloc(server, gfp_mask);
980 if (IS_ERR(p->f_label))
981 goto err_free_p;
982
8535b2be 983 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 984 if (p->o_arg.seqid == NULL)
14c43f76 985 goto err_free_label;
82a2c1b7
AV		 986 nfs_sb_active(dentry->d_sb);
987 p->dentry = dget(dentry);
e56e0b78
TM		 988 p->dir = parent;
989 p->owner = sp;
990 atomic_inc(&sp->so_count);
dc0b027d
TM		 991 p->o_arg.open_flags = flags;
992 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 993 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
994 * will return permission denied for all bits until close */
995 if (!(flags & O_EXCL)) {
996 /* ask server to check for all possible rights as results
997 * are cached */
998 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
999 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1000 }
7539bbab 1001 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1002 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1003 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1004 p->o_arg.name = &dentry->d_name;
e56e0b78 1005 p->o_arg.server = server;
aa9c2669 1006 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1007 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1008 p->o_arg.label = label;
49f9a0fa
TM		 1009 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1010 switch (p->o_arg.claim) {
4a1c0893
TM		 1011 case NFS4_OPEN_CLAIM_NULL:
1012 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1013 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1014 p->o_arg.fh = NFS_FH(dir);
1015 break;
1016 case NFS4_OPEN_CLAIM_PREVIOUS:
1017 case NFS4_OPEN_CLAIM_FH:
1018 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1019 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1020 p->o_arg.fh = NFS_FH(dentry->d_inode);
1021 }
536e43d1 1022 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1023 __u32 verf[2];
d77d76ff 1024
e56e0b78
TM		 1025 p->o_arg.u.attrs = &p->attrs;
1026 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1027
1028 verf[0] = jiffies;
1029 verf[1] = current->pid;
1030 memcpy(p->o_arg.u.verifier.data, verf,
1031 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1032 }
cdd4e68b
TM		 1033 p->c_arg.fh = &p->o_res.fh;
1034 p->c_arg.stateid = &p->o_res.stateid;
1035 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1036 nfs4_init_opendata_res(p);
c6d00e63 1037 kref_init(&p->kref);
e56e0b78 1038 return p;
14c43f76
DQ		 1039
1040err_free_label:
1041 nfs4_label_free(p->f_label);
1042err_free_p:
e56e0b78
TM		 1043 kfree(p);
1044err:
1045 dput(parent);
1046 return NULL;
1047}
1048
c6d00e63 1049static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1050{
c6d00e63
TM		 1051 struct nfs4_opendata *p = container_of(kref,
1052 struct nfs4_opendata, kref);
82a2c1b7 1053 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1054
1055 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1056 if (p->state != NULL)
1057 nfs4_put_open_state(p->state);
c6d00e63 1058 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1059
1060 nfs4_label_free(p->f_label);
1061
c6d00e63 1062 dput(p->dir);
82a2c1b7
AV		 1063 dput(p->dentry);
1064 nfs_sb_deactive(sb);
6926afd1 1065 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1066 kfree(p);
1067}
1068
1069static void nfs4_opendata_put(struct nfs4_opendata *p)
1070{
1071 if (p != NULL)
1072 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1073}
1074
06f814a3
TM		 1075static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1076{
06f814a3
TM		 1077 int ret;
1078
06f814a3 1079 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1080 return ret;
1081}
1082
dc0b027d 1083static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1084{
1085 int ret = 0;
dc0b027d 1086
536e43d1 1087 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1088 goto out;
1089 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1090 case FMODE_READ:
88069f77
TM		 1091 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1092 && state->n_rdonly != 0;
6ee41268
TM		 1093 break;
1094 case FMODE_WRITE:
88069f77
TM		 1095 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1096 && state->n_wronly != 0;
6ee41268
TM		 1097 break;
1098 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1099 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1100 && state->n_rdwr != 0;
6ee41268 1101 }
dc0b027d 1102out:
6ee41268
TM		 1103 return ret;
1104}
1105
dc0b027d 1106static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1107{
652f89f6
TM		 1108 if (delegation == NULL)
1109 return 0;
dc0b027d 1110 if ((delegation->type & fmode) != fmode)
aac00a8d 1111 return 0;
15c831bf 1112 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1113 return 0;
d25be546
TM		 1114 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1115 return 0;
b7391f44 1116 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1117 return 1;
1118}
1119
dc0b027d 1120static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1121{
dc0b027d 1122 switch (fmode) {
e7616923
TM		 1123 case FMODE_WRITE:
1124 state->n_wronly++;
1125 break;
1126 case FMODE_READ:
1127 state->n_rdonly++;
1128 break;
1129 case FMODE_READ|FMODE_WRITE:
1130 state->n_rdwr++;
1131 }
dc0b027d 1132 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1133}
1134
dc0b027d 1135static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1136{
1137 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1138 nfs4_stateid_copy(&state->stateid, stateid);
1139 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1140 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1141 switch (fmode) {
003707c7
TM		 1142 case FMODE_READ:
1143 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1144 break;
1145 case FMODE_WRITE:
1146 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1147 break;
1148 case FMODE_READ|FMODE_WRITE:
1149 set_bit(NFS_O_RDWR_STATE, &state->flags);
1150 }
e7616923
TM		 1151}
1152
dc0b027d 1153static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1154{
8bda4e4c 1155 write_seqlock(&state->seqlock);
dc0b027d 1156 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1157 write_sequnlock(&state->seqlock);
003707c7
TM		 1158}
1159
dc0b027d 1160static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1161{
8bda4e4c
TM		 1162 /*
1163 * Protect the call to nfs4_state_set_mode_locked and
1164 * serialise the stateid update
1165 */
1166 write_seqlock(&state->seqlock);
003707c7 1167 if (deleg_stateid != NULL) {
f597c537 1168 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1169 set_bit(NFS_DELEGATED_STATE, &state->flags);
1170 }
1171 if (open_stateid != NULL)
dc0b027d 1172 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1173 write_sequnlock(&state->seqlock);
1174 spin_lock(&state->owner->so_lock);
dc0b027d 1175 update_open_stateflags(state, fmode);
ec073428 1176 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1177}
1178
dc0b027d 1179static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1180{
1181 struct nfs_inode *nfsi = NFS_I(state->inode);
1182 struct nfs_delegation *deleg_cur;
1183 int ret = 0;
1184
dc0b027d 1185 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1186
1187 rcu_read_lock();
1188 deleg_cur = rcu_dereference(nfsi->delegation);
1189 if (deleg_cur == NULL)
1190 goto no_delegation;
1191
1192 spin_lock(&deleg_cur->lock);
17f26b12 1193 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1194 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1195 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1196 goto no_delegation_unlock;
1197
1198 if (delegation == NULL)
1199 delegation = &deleg_cur->stateid;
f597c537 1200 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1201 goto no_delegation_unlock;
1202
b7391f44 1203 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1204 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1205 ret = 1;
1206no_delegation_unlock:
1207 spin_unlock(&deleg_cur->lock);
1208no_delegation:
1209 rcu_read_unlock();
1210
1211 if (!ret && open_stateid != NULL) {
dc0b027d 1212 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1213 ret = 1;
1214 }
1215
1216 return ret;
1217}
1218
1219
dc0b027d 1220static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1221{
1222 struct nfs_delegation *delegation;
1223
1224 rcu_read_lock();
1225 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1226 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1227 rcu_read_unlock();
1228 return;
1229 }
1230 rcu_read_unlock();
57ec14c5 1231 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1232}
1233
6ee41268 1234static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1235{
1236 struct nfs4_state *state = opendata->state;
1237 struct nfs_inode *nfsi = NFS_I(state->inode);
1238 struct nfs_delegation *delegation;
f448badd 1239 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1240 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1241 nfs4_stateid stateid;
1242 int ret = -EAGAIN;
1243
aac00a8d 1244 for (;;) {
dc0b027d 1245 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1246 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1247 if (can_open_cached(state, fmode, open_mode)) {
1248 update_open_stateflags(state, fmode);
6ee41268 1249 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1250 goto out_return_state;
1251 }
1252 spin_unlock(&state->owner->so_lock);
1253 }
34310430
TM		 1254 rcu_read_lock();
1255 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1256 if (!can_open_delegated(delegation, fmode)) {
34310430 1257 rcu_read_unlock();
aac00a8d 1258 break;
34310430 1259 }
aac00a8d 1260 /* Save the delegation */
f597c537 1261 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1262 rcu_read_unlock();
fa332941 1263 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1264 if (!opendata->is_recover) {
1265 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1266 if (ret != 0)
1267 goto out;
1268 }
aac00a8d 1269 ret = -EAGAIN;
34310430
TM		 1270
1271 /* Try to update the stateid using the delegation */
dc0b027d 1272 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1273 goto out_return_state;
aac00a8d 1274 }
aac00a8d
TM		 1275out:
1276 return ERR_PTR(ret);
1277out_return_state:
1278 atomic_inc(&state->count);
1279 return state;
1280}
1281
e23008ec
AA		 1282static void
1283nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1284{
1285 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1286 struct nfs_delegation *delegation;
1287 int delegation_flags = 0;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1291 if (delegation)
1292 delegation_flags = delegation->flags;
1293 rcu_read_unlock();
1294 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1295 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1296 "returning a delegation for "
1297 "OPEN(CLAIM_DELEGATE_CUR)\n",
1298 clp->cl_hostname);
1299 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1300 nfs_inode_set_delegation(state->inode,
1301 data->owner->so_cred,
1302 &data->o_res);
1303 else
1304 nfs_inode_reclaim_delegation(state->inode,
1305 data->owner->so_cred,
1306 &data->o_res);
1307}
1308
1309/*
1310 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1311 * and update the nfs4_state.
1312 */
1313static struct nfs4_state *
1314_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1315{
1316 struct inode *inode = data->state->inode;
1317 struct nfs4_state *state = data->state;
1318 int ret;
1319
d2bfda2e
WAA		 1320 if (!data->rpc_done) {
1321 if (data->rpc_status) {
1322 ret = data->rpc_status;
1323 goto err;
1324 }
1325 /* cached opens have already been processed */
1326 goto update;
e23008ec
AA		 1327 }
1328
e23008ec
AA		 1329 ret = nfs_refresh_inode(inode, &data->f_attr);
1330 if (ret)
1331 goto err;
1332
1333 if (data->o_res.delegation_type != 0)
1334 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1335update:
e23008ec
AA		 1336 update_open_stateid(state, &data->o_res.stateid, NULL,
1337 data->o_arg.fmode);
d49f042a 1338 atomic_inc(&state->count);
e23008ec
AA		 1339
1340 return state;
1341err:
1342 return ERR_PTR(ret);
1343
1344}
1345
1346static struct nfs4_state *
1347_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1348{
1349 struct inode *inode;
1350 struct nfs4_state *state = NULL;
1b370bc2 1351 int ret;
24ac23ab 1352
aac00a8d 1353 if (!data->rpc_done) {
6ee41268 1354 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1355 goto out;
1356 }
1357
1b370bc2 1358 ret = -EAGAIN;
24ac23ab 1359 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1360 goto err;
1775fd3e 1361 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1362 ret = PTR_ERR(inode);
03f28e3a 1363 if (IS_ERR(inode))
1b370bc2
TM		 1364 goto err;
1365 ret = -ENOMEM;
24ac23ab
TM		 1366 state = nfs4_get_open_state(inode, data->owner);
1367 if (state == NULL)
1b370bc2 1368 goto err_put_inode;
e23008ec
AA		 1369 if (data->o_res.delegation_type != 0)
1370 nfs4_opendata_check_deleg(data, state);
34310430 1371 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1372 data->o_arg.fmode);
24ac23ab 1373 iput(inode);
aac00a8d 1374out:
7aa262b5 1375 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1376 return state;
1b370bc2
TM		 1377err_put_inode:
1378 iput(inode);
1379err:
1380 return ERR_PTR(ret);
24ac23ab
TM		 1381}
1382
e23008ec
AA		 1383static struct nfs4_state *
1384nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1385{
1386 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1387 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1388 return _nfs4_opendata_to_nfs4_state(data);
1389}
1390
864472e9
TM		 1391static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1392{
1393 struct nfs_inode *nfsi = NFS_I(state->inode);
1394 struct nfs_open_context *ctx;
1395
1396 spin_lock(&state->inode->i_lock);
1397 list_for_each_entry(ctx, &nfsi->open_files, list) {
1398 if (ctx->state != state)
1399 continue;
1400 get_nfs_open_context(ctx);
1401 spin_unlock(&state->inode->i_lock);
1402 return ctx;
1403 }
1404 spin_unlock(&state->inode->i_lock);
1405 return ERR_PTR(-ENOENT);
1406}
1407
4a1c0893
TM		 1408static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1409 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1410{
1411 struct nfs4_opendata *opendata;
1412
4a1c0893 1413 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1414 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1415 if (opendata == NULL)
1416 return ERR_PTR(-ENOMEM);
1417 opendata->state = state;
1418 atomic_inc(&state->count);
1419 return opendata;
1420}
1421
dc0b027d 1422static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1423{
2ced46c2 1424 struct nfs4_state *newstate;
864472e9
TM		 1425 int ret;
1426
dc0b027d
TM		 1427 opendata->o_arg.open_flags = 0;
1428 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1429 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1430 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1431 nfs4_init_opendata_res(opendata);
b257957e 1432 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1433 if (ret != 0)
1434 return ret;
2ced46c2 1435 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1436 if (IS_ERR(newstate))
1437 return PTR_ERR(newstate);
643168c2 1438 nfs4_close_state(newstate, fmode);
2ced46c2 1439 *res = newstate;
864472e9
TM		 1440 return 0;
1441}
1442
1443static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1444{
864472e9 1445 struct nfs4_state *newstate;
864472e9
TM		 1446 int ret;
1447
1448 /* memory barrier prior to reading state->n_* */
2ced46c2 1449 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1450 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1451 smp_rmb();
1452 if (state->n_rdwr != 0) {
b0ed9dbc 1453 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1454 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1455 if (ret != 0)
1456 return ret;
2ced46c2
TM		 1457 if (newstate != state)
1458 return -ESTALE;
864472e9
TM		 1459 }
1460 if (state->n_wronly != 0) {
b0ed9dbc 1461 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1462 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1463 if (ret != 0)
1464 return ret;
2ced46c2
TM		 1465 if (newstate != state)
1466 return -ESTALE;
864472e9
TM		 1467 }
1468 if (state->n_rdonly != 0) {
b0ed9dbc 1469 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1470 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1471 if (ret != 0)
1472 return ret;
2ced46c2
TM		 1473 if (newstate != state)
1474 return -ESTALE;
864472e9 1475 }
1ac7e2fd
TM		 1476 /*
1477 * We may have performed cached opens for all three recoveries.
1478 * Check if we need to update the current stateid.
1479 */
1480 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1481 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1482 write_seqlock(&state->seqlock);
1ac7e2fd 1483 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1484 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1485 write_sequnlock(&state->seqlock);
1ac7e2fd 1486 }
864472e9
TM		 1487 return 0;
1488}
1489
1da177e4
LT		 1490/*
1491 * OPEN_RECLAIM:
1492 * reclaim state on the server after a reboot.
1da177e4 1493 */
539cd03a 1494static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1495{
1ac7e2fd 1496 struct nfs_delegation *delegation;
864472e9 1497 struct nfs4_opendata *opendata;
dc0b027d 1498 fmode_t delegation_type = 0;
1da177e4
LT		 1499 int status;
1500
4a1c0893
TM		 1501 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1502 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1503 if (IS_ERR(opendata))
1504 return PTR_ERR(opendata);
1ac7e2fd
TM		 1505 rcu_read_lock();
1506 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1507 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1508 delegation_type = delegation->type;
1ac7e2fd 1509 rcu_read_unlock();
864472e9
TM		 1510 opendata->o_arg.u.delegation_type = delegation_type;
1511 status = nfs4_open_recover(opendata, state);
c6d00e63 1512 nfs4_opendata_put(opendata);
1da177e4
LT		 1513 return status;
1514}
1515
539cd03a 1516static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1517{
1518 struct nfs_server *server = NFS_SERVER(state->inode);
1519 struct nfs4_exception exception = { };
1520 int err;
1521 do {
539cd03a 1522 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1523 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1524 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1525 continue;
168667c4 1526 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1527 break;
1528 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1529 } while (exception.retry);
1530 return err;
1531}
1532
864472e9
TM		 1533static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1534{
1535 struct nfs_open_context *ctx;
1536 int ret;
1537
1538 ctx = nfs4_state_find_open_context(state);
1539 if (IS_ERR(ctx))
91876b13 1540 return -EAGAIN;
539cd03a 1541 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1542 put_nfs_open_context(ctx);
1543 return ret;
1544}
1545
db4f2e63 1546static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1547{
be76b5b6
TM		 1548 switch (err) {
1549 default:
1550 printk(KERN_ERR "NFS: %s: unhandled error "
1551 "%d.\n", __func__, err);
1552 case 0:
1553 case -ENOENT:
1554 case -ESTALE:
1555 break;
1556 case -NFS4ERR_BADSESSION:
1557 case -NFS4ERR_BADSLOT:
1558 case -NFS4ERR_BAD_HIGH_SLOT:
1559 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1560 case -NFS4ERR_DEADSESSION:
1561 set_bit(NFS_DELEGATED_STATE, &state->flags);
1562 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1563 return -EAGAIN;
1564 case -NFS4ERR_STALE_CLIENTID:
1565 case -NFS4ERR_STALE_STATEID:
1566 set_bit(NFS_DELEGATED_STATE, &state->flags);
1567 case -NFS4ERR_EXPIRED:
1568 /* Don't recall a delegation if it was lost */
1569 nfs4_schedule_lease_recovery(server->nfs_client);
1570 return -EAGAIN;
1571 case -NFS4ERR_DELEG_REVOKED:
1572 case -NFS4ERR_ADMIN_REVOKED:
1573 case -NFS4ERR_BAD_STATEID:
db4f2e63 1574 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1575 nfs_inode_find_state_and_recover(state->inode,
1576 stateid);
1577 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1578 return 0;
1579 case -NFS4ERR_DELAY:
1580 case -NFS4ERR_GRACE:
1581 set_bit(NFS_DELEGATED_STATE, &state->flags);
1582 ssleep(1);
1583 return -EAGAIN;
db4f2e63
TM		 1584 case -ENOMEM:
1585 case -NFS4ERR_DENIED:
1586 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1587 return 0;
be76b5b6 1588 }
1da177e4
LT		 1589 return err;
1590}
1591
db4f2e63
TM		 1592int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1593{
1594 struct nfs_server *server = NFS_SERVER(state->inode);
1595 struct nfs4_opendata *opendata;
1596 int err;
1597
1598 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1599 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1600 if (IS_ERR(opendata))
1601 return PTR_ERR(opendata);
1602 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1603 err = nfs4_open_recover(opendata, state);
1604 nfs4_opendata_put(opendata);
1605 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1606}
1607
be05c860
CL		 1608static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1609{
1610 struct nfs4_opendata *data = calldata;
1611
1612 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1613 &data->o_res.seq_res, task);
1614}
1615
cdd4e68b
TM		 1616static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1617{
1618 struct nfs4_opendata *data = calldata;
1619
be05c860
CL		 1620 nfs40_sequence_done(task, &data->o_res.seq_res);
1621
cdd4e68b 1622 data->rpc_status = task->tk_status;
26e976a8 1623 if (data->rpc_status == 0) {
f597c537 1624 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1625 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1626 renew_lease(data->o_res.server, data->timestamp);
3e309914 1627 data->rpc_done = 1;
26e976a8 1628 }
cdd4e68b
TM		 1629}
1630
1631static void nfs4_open_confirm_release(void *calldata)
1632{
1633 struct nfs4_opendata *data = calldata;
1634 struct nfs4_state *state = NULL;
1635
1636 /* If this request hasn't been cancelled, do nothing */
1637 if (data->cancelled == 0)
1638 goto out_free;
1639 /* In case of error, no cleanup! */
3e309914 1640 if (!data->rpc_done)
cdd4e68b 1641 goto out_free;
cdd4e68b 1642 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1643 if (!IS_ERR(state))
643168c2 1644 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1645out_free:
c6d00e63 1646 nfs4_opendata_put(data);
cdd4e68b
TM		 1647}
1648
1649static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1650 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1651 .rpc_call_done = nfs4_open_confirm_done,
1652 .rpc_release = nfs4_open_confirm_release,
1653};
1654
1655/*
1656 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1657 */
1658static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1659{
1660 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1661 struct rpc_task *task;
5138fde0
TM		 1662 struct rpc_message msg = {
1663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1664 .rpc_argp = &data->c_arg,
1665 .rpc_resp = &data->c_res,
1666 .rpc_cred = data->owner->so_cred,
1667 };
c970aa85
TM		 1668 struct rpc_task_setup task_setup_data = {
1669 .rpc_client = server->client,
5138fde0 1670 .rpc_message = &msg,
c970aa85
TM		 1671 .callback_ops = &nfs4_open_confirm_ops,
1672 .callback_data = data,
101070ca 1673 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1674 .flags = RPC_TASK_ASYNC,
1675 };
1da177e4
LT		 1676 int status;
1677
be05c860 1678 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1679 kref_get(&data->kref);
3e309914
TM		 1680 data->rpc_done = 0;
1681 data->rpc_status = 0;
5138fde0 1682 data->timestamp = jiffies;
c970aa85 1683 task = rpc_run_task(&task_setup_data);
7a1218a2 1684 if (IS_ERR(task))
cdd4e68b 1685 return PTR_ERR(task);
cdd4e68b
TM		 1686 status = nfs4_wait_for_completion_rpc_task(task);
1687 if (status != 0) {
1688 data->cancelled = 1;
1689 smp_wmb();
1690 } else
1691 status = data->rpc_status;
e6b3c4db 1692 rpc_put_task(task);
1da177e4
LT		 1693 return status;
1694}
1695
24ac23ab 1696static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1697{
24ac23ab
TM		 1698 struct nfs4_opendata *data = calldata;
1699 struct nfs4_state_owner *sp = data->owner;
549b19cc 1700 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1701
24ac23ab 1702 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1703 goto out_wait;
aac00a8d
TM		 1704 /*
1705 * Check if we still need to send an OPEN call, or if we can use
1706 * a delegation instead.
1707 */
1708 if (data->state != NULL) {
1709 struct nfs_delegation *delegation;
1710
dc0b027d 1711 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1712 goto out_no_action;
aac00a8d
TM		 1713 rcu_read_lock();
1714 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1715 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1716 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1717 can_open_delegated(delegation, data->o_arg.fmode))
1718 goto unlock_no_action;
aac00a8d
TM		 1719 rcu_read_unlock();
1720 }
95b72eb0 1721 /* Update client id. */
549b19cc 1722 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1723 switch (data->o_arg.claim) {
1724 case NFS4_OPEN_CLAIM_PREVIOUS:
1725 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1726 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1727 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1728 case NFS4_OPEN_CLAIM_FH:
1729 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1730 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1731 }
26e976a8 1732 data->timestamp = jiffies;
035168ab 1733 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1734 &data->o_arg.seq_args,
2240a9e2
TM		 1735 &data->o_res.seq_res,
1736 task) != 0)
1737 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1738
1739 /* Set the create mode (note dependency on the session type) */
1740 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1741 if (data->o_arg.open_flags & O_EXCL) {
1742 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1743 if (nfs4_has_persistent_session(clp))
1744 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1745 else if (clp->cl_mvops->minor_version > 0)
1746 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1747 }
6ee41268 1748 return;
652f89f6
TM		 1749unlock_no_action:
1750 rcu_read_unlock();
6ee41268
TM		 1751out_no_action:
1752 task->tk_action = NULL;
c8da19b9 1753out_wait:
b75ad4cd 1754 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1755}
1756
24ac23ab
TM		 1757static void nfs4_open_done(struct rpc_task *task, void *calldata)
1758{
1759 struct nfs4_opendata *data = calldata;
1da177e4 1760
24ac23ab 1761 data->rpc_status = task->tk_status;
d898528c 1762
14516c3a
TM		 1763 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1764 return;
d898528c 1765
24ac23ab 1766 if (task->tk_status == 0) {
807d66d8
TM		 1767 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1768 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1769 case S_IFREG:
1770 break;
1771 case S_IFLNK:
24ac23ab 1772 data->rpc_status = -ELOOP;
6f926b5b
TM		 1773 break;
1774 case S_IFDIR:
24ac23ab 1775 data->rpc_status = -EISDIR;
6f926b5b
TM		 1776 break;
1777 default:
24ac23ab 1778 data->rpc_status = -ENOTDIR;
807d66d8 1779 }
6f926b5b 1780 }
26e976a8 1781 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1782 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1783 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1784 }
3e309914 1785 data->rpc_done = 1;
24ac23ab 1786}
6f926b5b 1787
24ac23ab
TM		 1788static void nfs4_open_release(void *calldata)
1789{
1790 struct nfs4_opendata *data = calldata;
1791 struct nfs4_state *state = NULL;
1792
1793 /* If this request hasn't been cancelled, do nothing */
1794 if (data->cancelled == 0)
1795 goto out_free;
1796 /* In case of error, no cleanup! */
3e309914 1797 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1798 goto out_free;
1799 /* In case we need an open_confirm, no cleanup! */
1800 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1801 goto out_free;
24ac23ab 1802 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1803 if (!IS_ERR(state))
643168c2 1804 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1805out_free:
c6d00e63 1806 nfs4_opendata_put(data);
24ac23ab
TM		 1807}
1808
1809static const struct rpc_call_ops nfs4_open_ops = {
1810 .rpc_call_prepare = nfs4_open_prepare,
1811 .rpc_call_done = nfs4_open_done,
1812 .rpc_release = nfs4_open_release,
1813};
1814
b257957e 1815static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1816{
1817 struct inode *dir = data->dir->d_inode;
1818 struct nfs_server *server = NFS_SERVER(dir);
1819 struct nfs_openargs *o_arg = &data->o_arg;
1820 struct nfs_openres *o_res = &data->o_res;
1821 struct rpc_task *task;
5138fde0
TM		 1822 struct rpc_message msg = {
1823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1824 .rpc_argp = o_arg,
1825 .rpc_resp = o_res,
1826 .rpc_cred = data->owner->so_cred,
1827 };
c970aa85
TM		 1828 struct rpc_task_setup task_setup_data = {
1829 .rpc_client = server->client,
5138fde0 1830 .rpc_message = &msg,
c970aa85
TM		 1831 .callback_ops = &nfs4_open_ops,
1832 .callback_data = data,
101070ca 1833 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1834 .flags = RPC_TASK_ASYNC,
1835 };
24ac23ab
TM		 1836 int status;
1837
a9c92d6b 1838 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1839 kref_get(&data->kref);
3e309914
TM		 1840 data->rpc_done = 0;
1841 data->rpc_status = 0;
2ced46c2 1842 data->cancelled = 0;
bdeca1b7
TM		 1843 data->is_recover = 0;
1844 if (isrecover) {
8fe72bac 1845 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1846 data->is_recover = 1;
1847 }
c970aa85 1848 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1849 if (IS_ERR(task))
1850 return PTR_ERR(task);
1851 status = nfs4_wait_for_completion_rpc_task(task);
1852 if (status != 0) {
1853 data->cancelled = 1;
1854 smp_wmb();
1855 } else
1856 status = data->rpc_status;
1857 rpc_put_task(task);
1858
1859 return status;
1860}
1861
1862static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1863{
1864 struct inode *dir = data->dir->d_inode;
1865 struct nfs_openres *o_res = &data->o_res;
1866 int status;
1867
1868 status = nfs4_run_open_task(data, 1);
1869 if (status != 0 || !data->rpc_done)
1870 return status;
1871
6926afd1
TM		 1872 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1873
b257957e
AB		 1874 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1875 status = _nfs4_proc_open_confirm(data);
1876 if (status != 0)
1877 return status;
1878 }
1879
1880 return status;
1881}
1882
6168f62c
WAA		 1883static int nfs4_opendata_access(struct rpc_cred *cred,
1884 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1885 struct nfs4_state *state, fmode_t fmode,
1886 int openflags)
6168f62c
WAA		 1887{
1888 struct nfs_access_entry cache;
1889 u32 mask;
1890
1891 /* access call failed or for some reason the server doesn't
1892 * support any access modes -- defer access call until later */
1893 if (opendata->o_res.access_supported == 0)
1894 return 0;
1895
1896 mask = 0;
bbd3a8ee 1897 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1898 * write mode bits, but POSIX allows the creating process to write.
1899 * use openflags to check for exec, because fmode won't
1900 * always have FMODE_EXEC set when file open for exec. */
1901 if (openflags & __FMODE_EXEC) {
1902 /* ONLY check for exec rights */
1903 mask = MAY_EXEC;
1904 } else if (fmode & FMODE_READ)
1905 mask = MAY_READ;
6168f62c
WAA		 1906
1907 cache.cred = cred;
1908 cache.jiffies = jiffies;
1909 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1910 nfs_access_add_cache(state->inode, &cache);
1911
bbd3a8ee 1912 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1913 return 0;
1914
1915 /* even though OPEN succeeded, access is denied. Close the file */
1916 nfs4_close_state(state, fmode);
998f40b5 1917 return -EACCES;
6168f62c
WAA		 1918}
1919
b257957e
AB		 1920/*
1921 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1922 */
1923static int _nfs4_proc_open(struct nfs4_opendata *data)
1924{
1925 struct inode *dir = data->dir->d_inode;
1926 struct nfs_server *server = NFS_SERVER(dir);
1927 struct nfs_openargs *o_arg = &data->o_arg;
1928 struct nfs_openres *o_res = &data->o_res;
1929 int status;
1930
1931 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1932 if (!data->rpc_done)
1933 return status;
1934 if (status != 0) {
1935 if (status == -NFS4ERR_BADNAME &&
1936 !(o_arg->open_flags & O_CREAT))
1937 return -ENOENT;
24ac23ab 1938 return status;
08ef7bd3 1939 }
24ac23ab 1940
6926afd1
TM		 1941 nfs_fattr_map_and_free_names(server, &data->f_attr);
1942
5bc2afc2 1943 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1944 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1945 if (o_arg->open_flags & O_EXCL)
1946 data->file_created = 1;
1947 else if (o_res->cinfo.before != o_res->cinfo.after)
1948 data->file_created = 1;
1949 }
0df5dd4a
TM		 1950 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1951 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1952 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1953 status = _nfs4_proc_open_confirm(data);
1da177e4 1954 if (status != 0)
24ac23ab 1955 return status;
1da177e4
LT		 1956 }
1957 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1958 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1959 return 0;
1da177e4
LT		 1960}
1961
d83217c1
AA		 1962static int nfs4_recover_expired_lease(struct nfs_server *server)
1963{
1964 return nfs4_client_recover_expired_lease(server->nfs_client);
1965}
1966
1da177e4
LT		 1967/*
1968 * OPEN_EXPIRED:
1969 * reclaim state on the server after a network partition.
1970 * Assumes caller holds the appropriate lock
1971 */
539cd03a 1972static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1973{
e56e0b78 1974 struct nfs4_opendata *opendata;
864472e9 1975 int ret;
1da177e4 1976
4a1c0893 1977 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1978 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1979 if (IS_ERR(opendata))
1980 return PTR_ERR(opendata);
864472e9 1981 ret = nfs4_open_recover(opendata, state);
35d05778 1982 if (ret == -ESTALE)
3d4ff43d 1983 d_drop(ctx->dentry);
c6d00e63 1984 nfs4_opendata_put(opendata);
864472e9 1985 return ret;
1da177e4
LT		 1986}
1987
a9ed2e25 1988static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1989{
539cd03a 1990 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1991 struct nfs4_exception exception = { };
1992 int err;
1993
1994 do {
539cd03a 1995 err = _nfs4_open_expired(ctx, state);
42113a75 1996 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1997 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1998 continue;
a9ed2e25
TM		 1999 switch (err) {
2000 default:
2001 goto out;
2002 case -NFS4ERR_GRACE:
2003 case -NFS4ERR_DELAY:
2004 nfs4_handle_exception(server, err, &exception);
2005 err = 0;
2006 }
202b50dc 2007 } while (exception.retry);
a9ed2e25 2008out:
202b50dc
TM		 2009 return err;
2010}
2011
1da177e4
LT		 2012static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2013{
1da177e4 2014 struct nfs_open_context *ctx;
864472e9 2015 int ret;
1da177e4 2016
864472e9
TM		 2017 ctx = nfs4_state_find_open_context(state);
2018 if (IS_ERR(ctx))
91876b13 2019 return -EAGAIN;
539cd03a 2020 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2021 put_nfs_open_context(ctx);
2022 return ret;
1da177e4
LT		 2023}
2024
f062eb6c 2025#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2026static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2027{
f062eb6c 2028 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2029 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2030 struct nfs_delegation *delegation;
2031 struct rpc_cred *cred = NULL;
2032 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2033
2034 /* If a state reset has been done, test_stateid is unneeded */
2035 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2036 return;
2037
ab7cb0df
TM		 2038 /* Get the delegation credential for use by test/free_stateid */
2039 rcu_read_lock();
2040 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2041 if (delegation != NULL &&
2042 nfs4_stateid_match(&delegation->stateid, stateid)) {
2043 cred = get_rpccred(delegation->cred);
2044 rcu_read_unlock();
2045 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2046 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2047 } else
2048 rcu_read_unlock();
2049
3e60ffdd
CL		 2050 if (status != NFS_OK) {
2051 /* Free the stateid unless the server explicitly
2052 * informs us the stateid is unrecognized. */
2053 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2054 nfs41_free_stateid(server, stateid, cred);
6938867e 2055 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2056
6938867e
BS		 2057 write_seqlock(&state->seqlock);
2058 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2059 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2060 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2061 }
ab7cb0df
TM		 2062
2063 if (cred != NULL)
2064 put_rpccred(cred);
3e60ffdd
CL		 2065}
2066
2067/**
2068 * nfs41_check_open_stateid - possibly free an open stateid
2069 *
2070 * @state: NFSv4 state for an inode
2071 *
2072 * Returns NFS_OK if recovery for this stateid is now finished.
2073 * Otherwise a negative NFS4ERR value is returned.
2074 */
2075static int nfs41_check_open_stateid(struct nfs4_state *state)
2076{
2077 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2078 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2079 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2080 int status;
2081
2082 /* If a state reset has been done, test_stateid is unneeded */
2083 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2084 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2085 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2086 return -NFS4ERR_BAD_STATEID;
2087
ab7cb0df 2088 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2089 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2090 if (status != NFS_OK) {
2091 /* Free the stateid unless the server explicitly
2092 * informs us the stateid is unrecognized. */
2093 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2094 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2095
2096 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2097 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2098 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2099 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2100 }
2101 return status;
2102}
2103
2104static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2105{
eb64cf96 2106 int status;
b01dd1d8 2107
3e60ffdd
CL		 2108 nfs41_clear_delegation_stateid(state);
2109 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2110 if (status != NFS_OK)
2111 status = nfs4_open_expired(sp, state);
2112 return status;
f062eb6c
BS		 2113}
2114#endif
2115
aa53ed54
JL		 2116/*
2117 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2118 * fields corresponding to attributes that were used to store the verifier.
2119 * Make sure we clobber those fields in the later setattr call
2120 */
2121static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2122{
2123 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2124 !(sattr->ia_valid & ATTR_ATIME_SET))
2125 sattr->ia_valid |= ATTR_ATIME;
2126
2127 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2128 !(sattr->ia_valid & ATTR_MTIME_SET))
2129 sattr->ia_valid |= ATTR_MTIME;
2130}
2131
c21443c2
TM		 2132static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2133 fmode_t fmode,
2134 int flags,
3efb9722 2135 struct nfs_open_context *ctx)
c21443c2
TM		 2136{
2137 struct nfs4_state_owner *sp = opendata->owner;
2138 struct nfs_server *server = sp->so_server;
275bb307 2139 struct dentry *dentry;
c21443c2
TM		 2140 struct nfs4_state *state;
2141 unsigned int seq;
2142 int ret;
2143
2144 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2145
2146 ret = _nfs4_proc_open(opendata);
2147 if (ret != 0)
2148 goto out;
2149
2150 state = nfs4_opendata_to_nfs4_state(opendata);
2151 ret = PTR_ERR(state);
2152 if (IS_ERR(state))
2153 goto out;
2154 if (server->caps & NFS_CAP_POSIX_LOCK)
2155 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2156
275bb307
TM		 2157 dentry = opendata->dentry;
2158 if (dentry->d_inode == NULL) {
2159 /* FIXME: Is this d_drop() ever needed? */
2160 d_drop(dentry);
2161 dentry = d_add_unique(dentry, igrab(state->inode));
2162 if (dentry == NULL) {
2163 dentry = opendata->dentry;
2164 } else if (dentry != ctx->dentry) {
2165 dput(ctx->dentry);
2166 ctx->dentry = dget(dentry);
2167 }
2168 nfs_set_verifier(dentry,
2169 nfs_save_change_attribute(opendata->dir->d_inode));
2170 }
2171
c21443c2
TM		 2172 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2173 if (ret != 0)
2174 goto out;
2175
3efb9722 2176 ctx->state = state;
c45ffdd2
TM		 2177 if (dentry->d_inode == state->inode) {
2178 nfs_inode_attach_open_context(ctx);
2179 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2180 nfs4_schedule_stateid_recovery(server, state);
2181 }
c21443c2
TM		 2182out:
2183 return ret;
2184}
2185
1da177e4 2186/*
24ac23ab 2187 * Returns a referenced nfs4_state
1da177e4 2188 */
82be417a 2189static int _nfs4_do_open(struct inode *dir,
4197a055 2190 struct nfs_open_context *ctx,
82be417a
AA		 2191 int flags,
2192 struct iattr *sattr,
5bc2afc2
TM		 2193 struct nfs4_label *label,
2194 int *opened)
1da177e4
LT		 2195{
2196 struct nfs4_state_owner *sp;
2197 struct nfs4_state *state = NULL;
2198 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2199 struct nfs4_opendata *opendata;
4197a055
TM		 2200 struct dentry *dentry = ctx->dentry;
2201 struct rpc_cred *cred = ctx->cred;
2202 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2203 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2204 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2205 struct nfs4_label *olabel = NULL;
aac00a8d 2206 int status;
1da177e4
LT		 2207
2208 /* Protect against reboot recovery conflicts */
1da177e4 2209 status = -ENOMEM;
d1e284d5
TM		 2210 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2211 if (sp == NULL) {
1da177e4
LT		 2212 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2213 goto out_err;
2214 }
58d9714a
TM		 2215 status = nfs4_recover_expired_lease(server);
2216 if (status != 0)
b4454fe1 2217 goto err_put_state_owner;
82a2c1b7
AV		 2218 if (dentry->d_inode != NULL)
2219 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2220 status = -ENOMEM;
49f9a0fa
TM		 2221 if (dentry->d_inode)
2222 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2223 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2224 label, claim, GFP_KERNEL);
e56e0b78 2225 if (opendata == NULL)
95d35cb4 2226 goto err_put_state_owner;
1da177e4 2227
14c43f76
DQ		 2228 if (label) {
2229 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2230 if (IS_ERR(olabel)) {
2231 status = PTR_ERR(olabel);
2232 goto err_opendata_put;
2233 }
2234 }
2235
82be417a
AA		 2236 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2237 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2238 if (!opendata->f_attr.mdsthreshold)
14c43f76 2239 goto err_free_label;
1549210f 2240 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2241 }
82a2c1b7
AV		 2242 if (dentry->d_inode != NULL)
2243 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2244
3efb9722 2245 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2246 if (status != 0)
14c43f76 2247 goto err_free_label;
3efb9722 2248 state = ctx->state;
6168f62c 2249
549b19cc
TM		 2250 if ((opendata->o_arg.open_flags & O_EXCL) &&
2251 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2252 nfs4_exclusive_attrset(opendata, sattr);
2253
2254 nfs_fattr_init(opendata->o_res.f_attr);
2255 status = nfs4_do_setattr(state->inode, cred,
2256 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2257 state, label, olabel);
2258 if (status == 0) {
0ab64e0e 2259 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2260 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2261 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2262 }
0ab64e0e 2263 }
5bc2afc2
TM		 2264 if (opendata->file_created)
2265 *opened |= FILE_CREATED;
82be417a
AA		 2266
2267 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2268 *ctx_th = opendata->f_attr.mdsthreshold;
2269 else
2270 kfree(opendata->f_attr.mdsthreshold);
2271 opendata->f_attr.mdsthreshold = NULL;
2272
14c43f76
DQ		 2273 nfs4_label_free(olabel);
2274
c6d00e63 2275 nfs4_opendata_put(opendata);
1da177e4 2276 nfs4_put_state_owner(sp);
1da177e4 2277 return 0;
14c43f76
DQ		 2278err_free_label:
2279 nfs4_label_free(olabel);
c6d00e63 2280err_opendata_put:
82be417a 2281 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2282 nfs4_opendata_put(opendata);
e56e0b78
TM		 2283err_put_state_owner:
2284 nfs4_put_state_owner(sp);
1da177e4 2285out_err:
1da177e4
LT		 2286 return status;
2287}
2288
2289
82be417a 2290static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2291 struct nfs_open_context *ctx,
82be417a
AA		 2292 int flags,
2293 struct iattr *sattr,
5bc2afc2
TM		 2294 struct nfs4_label *label,
2295 int *opened)
1da177e4 2296{
49f9a0fa 2297 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2298 struct nfs4_exception exception = { };
2299 struct nfs4_state *res;
2300 int status;
2301
2302 do {
5bc2afc2 2303 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2304 res = ctx->state;
42113a75 2305 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2306 if (status == 0)
2307 break;
2308 /* NOTE: BAD_SEQID means the server and client disagree about the
2309 * book-keeping w.r.t. state-changing operations
2310 * (OPEN/CLOSE/LOCK/LOCKU...)
2311 * It is actually a sign of a bug on the client or on the server.
2312 *
2313 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2314 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2315 * have unhashed the old state_owner for us, and that we can
2316 * therefore safely retry using a new one. We should still warn
2317 * the user though...
2318 */
2319 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2320 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2321 " returned a bad sequence-id error!\n",
2322 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2323 exception.retry = 1;
2324 continue;
2325 }
550f5747
TM		 2326 /*
2327 * BAD_STATEID on OPEN means that the server cancelled our
2328 * state before it received the OPEN_CONFIRM.
2329 * Recover by retrying the request as per the discussion
2330 * on Page 181 of RFC3530.
2331 */
2332 if (status == -NFS4ERR_BAD_STATEID) {
2333 exception.retry = 1;
2334 continue;
2335 }
aac00a8d
TM		 2336 if (status == -EAGAIN) {
2337 /* We must have found a delegation */
2338 exception.retry = 1;
2339 continue;
2340 }
49f9a0fa
TM		 2341 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2342 continue;
2343 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2344 status, &exception));
2345 } while (exception.retry);
2346 return res;
2347}
2348
659bfcd6
TM		 2349static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2350 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2351 struct nfs4_state *state, struct nfs4_label *ilabel,
2352 struct nfs4_label *olabel)
1da177e4 2353{
3e4f6290 2354 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2355 struct nfs_setattrargs arg = {
3e4f6290 2356 .fh = NFS_FH(inode),
1da177e4
LT		 2357 .iap = sattr,
2358 .server = server,
2359 .bitmask = server->attr_bitmask,
1775fd3e 2360 .label = ilabel,
1da177e4
LT		 2361 };
2362 struct nfs_setattrres res = {
2363 .fattr = fattr,
1775fd3e 2364 .label = olabel,
1da177e4
LT		 2365 .server = server,
2366 };
2367 struct rpc_message msg = {
659bfcd6
TM		 2368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2369 .rpc_argp = &arg,
2370 .rpc_resp = &res,
2371 .rpc_cred = cred,
1da177e4 2372 };
26e976a8 2373 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2374 fmode_t fmode;
2375 bool truncate;
65e4308d 2376 int status;
1da177e4 2377
aa9c2669
DQ		 2378 arg.bitmask = nfs4_bitmask(server, ilabel);
2379 if (ilabel)
2380 arg.bitmask = nfs4_bitmask(server, olabel);
2381
0e574af1 2382 nfs_fattr_init(fattr);
1da177e4 2383
ee3ae84e
TM		 2384 /* Servers should only apply open mode checks for file size changes */
2385 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2386 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2387
2388 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2389 /* Use that stateid */
2390 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2391 struct nfs_lockowner lockowner = {
2392 .l_owner = current->files,
2393 .l_pid = current->tgid,
2394 };
4fc8796d 2395 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2396 &lockowner);
08e9eac4 2397 } else
f597c537 2398 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2399
7c513058 2400 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2401 if (status == 0 && state != NULL)
2402 renew_lease(server, timestamp);
65e4308d 2403 return status;
1da177e4
LT		 2404}
2405
659bfcd6
TM		 2406static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2407 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2408 struct nfs4_state *state, struct nfs4_label *ilabel,
2409 struct nfs4_label *olabel)
1da177e4 2410{
3e4f6290 2411 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2412 struct nfs4_exception exception = {
2413 .state = state,
3114ea7a 2414 .inode = inode,
a1d0b5ee 2415 };
1da177e4
LT		 2416 int err;
2417 do {
1775fd3e 2418 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2419 trace_nfs4_setattr(inode, err);
451146be
TM		 2420 switch (err) {
2421 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2422 if (!(sattr->ia_valid & ATTR_SIZE)) {
2423 pr_warn_once("NFSv4: server %s is incorrectly "
2424 "applying open mode checks to "
2425 "a SETATTR that is not "
2426 "changing file size.\n",
2427 server->nfs_client->cl_hostname);
2428 }
451146be
TM		 2429 if (state && !(state->state & FMODE_WRITE)) {
2430 err = -EBADF;
2431 if (sattr->ia_valid & ATTR_OPEN)
2432 err = -EACCES;
2433 goto out;
2434 }
2435 }
2436 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2437 } while (exception.retry);
451146be 2438out:
1da177e4
LT		 2439 return err;
2440}
2441
2442struct nfs4_closedata {
2443 struct inode *inode;
2444 struct nfs4_state *state;
2445 struct nfs_closeargs arg;
2446 struct nfs_closeres res;
516a6af6 2447 struct nfs_fattr fattr;
26e976a8 2448 unsigned long timestamp;
f7e8917a
FI		 2449 bool roc;
2450 u32 roc_barrier;
1da177e4
LT		 2451};
2452
963d8fe5 2453static void nfs4_free_closedata(void *data)
9512135d 2454{
963d8fe5
TM		 2455 struct nfs4_closedata *calldata = data;
2456 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2457 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2458
f7e8917a
FI		 2459 if (calldata->roc)
2460 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2461 nfs4_put_open_state(calldata->state);
2462 nfs_free_seqid(calldata->arg.seqid);
9512135d 2463 nfs4_put_state_owner(sp);
322b2b90 2464 nfs_sb_deactive(sb);
9512135d
TM		 2465 kfree(calldata);
2466}
2467
88069f77
TM		 2468static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2469 fmode_t fmode)
2470{
2471 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2472 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2473 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2474 case FMODE_WRITE:
88069f77 2475 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2476 break;
2477 case FMODE_READ:
88069f77 2478 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2479 break;
2480 case 0:
2481 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2482 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2483 clear_bit(NFS_OPEN_STATE, &state->flags);
2484 }
88069f77
TM		 2485 spin_unlock(&state->owner->so_lock);
2486}
2487
963d8fe5 2488static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2489{
963d8fe5 2490 struct nfs4_closedata *calldata = data;
1da177e4 2491 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2492 struct nfs_server *server = NFS_SERVER(calldata->inode);
2493
a3ca5651 2494 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2495 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2496 return;
42113a75 2497 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2498 /* hmm. we are done with the inode, and in the process of freeing
2499 * the state_owner. we keep this around to process errors
2500 */
1da177e4
LT		 2501 switch (task->tk_status) {
2502 case 0:
f7e8917a
FI		 2503 if (calldata->roc)
2504 pnfs_roc_set_barrier(state->inode,
2505 calldata->roc_barrier);
45328c35 2506 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2507 renew_lease(server, calldata->timestamp);
88069f77
TM		 2508 nfs4_close_clear_stateid_flags(state,
2509 calldata->arg.fmode);
1da177e4
LT		 2510 break;
2511 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2512 case -NFS4ERR_OLD_STATEID:
2513 case -NFS4ERR_BAD_STATEID:
1da177e4 2514 case -NFS4ERR_EXPIRED:
dc0b027d 2515 if (calldata->arg.fmode == 0)
9e33bed5 2516 break;
1da177e4 2517 default:
72211dbe
TM		 2518 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2519 rpc_restart_call_prepare(task);
1da177e4 2520 }
72211dbe 2521 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2522 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2523 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2524}
2525
4ce70ada 2526static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2527{
4ce70ada 2528 struct nfs4_closedata *calldata = data;
9512135d 2529 struct nfs4_state *state = calldata->state;
7fdab069 2530 struct inode *inode = calldata->inode;
88069f77 2531 int call_close = 0;
9512135d 2532
a3ca5651 2533 dprintk("%s: begin!\n", __func__);
963d8fe5 2534 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2535 goto out_wait;
003707c7 2536
88069f77
TM		 2537 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2538 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2539 spin_lock(&state->owner->so_lock);
003707c7 2540 /* Calculate the change in open mode */
e7616923 2541 if (state->n_rdwr == 0) {
003707c7 2542 if (state->n_rdonly == 0) {
88069f77
TM		 2543 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2544 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2545 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2546 }
2547 if (state->n_wronly == 0) {
88069f77
TM		 2548 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2549 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2550 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2551 }
e7616923 2552 }
5d422301
TM		 2553 if (!nfs4_valid_open_stateid(state))
2554 call_close = 0;
4cecb76f 2555 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2556
2557 if (!call_close) {
963d8fe5 2558 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2559 goto out_no_action;
9512135d 2560 }
88069f77 2561
f7e8917a 2562 if (calldata->arg.fmode == 0) {
88069f77 2563 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2564 if (calldata->roc &&
b9536ad5
AA		 2565 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2566 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2567 goto out_wait;
b9536ad5 2568 }
f7e8917a 2569 }
88069f77 2570
516a6af6 2571 nfs_fattr_init(calldata->res.fattr);
26e976a8 2572 calldata->timestamp = jiffies;
7fdab069 2573 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2574 &calldata->arg.seq_args,
2575 &calldata->res.seq_res,
2240a9e2
TM		 2576 task) != 0)
2577 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2578 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2579 return;
2580out_no_action:
2581 task->tk_action = NULL;
2582out_wait:
2583 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2584}
2585
963d8fe5 2586static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2587 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2588 .rpc_call_done = nfs4_close_done,
2589 .rpc_release = nfs4_free_closedata,
2590};
2591
1da177e4
LT		 2592/*
2593 * It is possible for data to be read/written from a mem-mapped file
2594 * after the sys_close call (which hits the vfs layer as a flush).
2595 * This means that we can't safely call nfsv4 close on a file until
2596 * the inode is cleared. This in turn means that we are not good
2597 * NFSv4 citizens - we do not indicate to the server to update the file's
2598 * share state even when we are done with one of the three share
2599 * stateid's in the inode.
2600 *
2601 * NOTE: Caller must be holding the sp->so_owner semaphore!
2602 */
1f7977c1 2603int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2604{
4a35bd41 2605 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2606 struct nfs4_closedata *calldata;
b39e625b
TM		 2607 struct nfs4_state_owner *sp = state->owner;
2608 struct rpc_task *task;
5138fde0
TM		 2609 struct rpc_message msg = {
2610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2611 .rpc_cred = state->owner->so_cred,
2612 };
c970aa85
TM		 2613 struct rpc_task_setup task_setup_data = {
2614 .rpc_client = server->client,
5138fde0 2615 .rpc_message = &msg,
c970aa85 2616 .callback_ops = &nfs4_close_ops,
101070ca 2617 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2618 .flags = RPC_TASK_ASYNC,
2619 };
9512135d 2620 int status = -ENOMEM;
1da177e4 2621
fa940720
WAA		 2622 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2623 &task_setup_data.rpc_client, &msg);
2624
8535b2be 2625 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2626 if (calldata == NULL)
9512135d 2627 goto out;
a9c92d6b 2628 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2629 calldata->inode = state->inode;
1da177e4 2630 calldata->state = state;
4a35bd41 2631 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2632 calldata->arg.stateid = &state->open_stateid;
1da177e4 2633 /* Serialization for the sequence id */
8535b2be 2634 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2635 if (calldata->arg.seqid == NULL)
2636 goto out_free_calldata;
dc0b027d 2637 calldata->arg.fmode = 0;
a65318bf 2638 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2639 calldata->res.fattr = &calldata->fattr;
c1d51931 2640 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2641 calldata->res.server = server;
1f7977c1 2642 calldata->roc = pnfs_roc(state->inode);
643168c2 2643 nfs_sb_active(calldata->inode->i_sb);
9512135d 2644
1174dd1f
TM		 2645 msg.rpc_argp = &calldata->arg;
2646 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2647 task_setup_data.callback_data = calldata;
2648 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2649 if (IS_ERR(task))
2650 return PTR_ERR(task);
a49c3c77
TM		 2651 status = 0;
2652 if (wait)
2653 status = rpc_wait_for_completion_task(task);
b39e625b 2654 rpc_put_task(task);
a49c3c77 2655 return status;
9512135d
TM		 2656out_free_calldata:
2657 kfree(calldata);
2658out:
b39e625b
TM		 2659 nfs4_put_open_state(state);
2660 nfs4_put_state_owner(sp);
9512135d 2661 return status;
1da177e4
LT		 2662}
2663
2b484297 2664static struct inode *
5bc2afc2
TM		 2665nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2666 int open_flags, struct iattr *attr, int *opened)
1da177e4 2667{
1da177e4 2668 struct nfs4_state *state;
aa9c2669
DQ		 2669 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2670
2671 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2672
565277f6 2673 /* Protect against concurrent sillydeletes */
5bc2afc2 2674 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2675
2676 nfs4_label_release_security(label);
2677
f46e0bd3
TM		 2678 if (IS_ERR(state))
2679 return ERR_CAST(state);
275bb307 2680 return state->inode;
1da177e4
LT		 2681}
2682
1185a552 2683static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2684{
2685 if (ctx->state == NULL)
2686 return;
2687 if (is_sync)
643168c2 2688 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2689 else
643168c2 2690 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2691}
1da177e4
LT		 2692
2693static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2694{
43652ad5
BH		 2695 struct nfs4_server_caps_arg args = {
2696 .fhandle = fhandle,
2697 };
1da177e4
LT		 2698 struct nfs4_server_caps_res res = {};
2699 struct rpc_message msg = {
2700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2701 .rpc_argp = &args,
1da177e4
LT		 2702 .rpc_resp = &res,
2703 };
2704 int status;
2705
7c513058 2706 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2707 if (status == 0) {
2708 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2709 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2710 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2711 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2712 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2713 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2714 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2715 server->caps |= NFS_CAP_ACLS;
2716 if (res.has_links != 0)
2717 server->caps |= NFS_CAP_HARDLINKS;
2718 if (res.has_symlinks != 0)
2719 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2720 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2721 server->caps |= NFS_CAP_FILEID;
2722 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2723 server->caps |= NFS_CAP_MODE;
2724 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2725 server->caps |= NFS_CAP_NLINK;
2726 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2727 server->caps |= NFS_CAP_OWNER;
2728 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2729 server->caps |= NFS_CAP_OWNER_GROUP;
2730 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2731 server->caps |= NFS_CAP_ATIME;
2732 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2733 server->caps |= NFS_CAP_CTIME;
2734 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2735 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2736#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2737 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2738 server->caps |= NFS_CAP_SECURITY_LABEL;
2739#endif
2740 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2741 sizeof(server->attr_bitmask));
62ab460c 2742
aa9c2669
DQ		 2743 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2744 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2745 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2746 }
a65318bf
TM		 2747 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2748 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2749 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2750 server->acl_bitmask = res.acl_bitmask;
264e6351 2751 server->fh_expire_type = res.fh_expire_type;
1da177e4 2752 }
cccef3b9 2753
1da177e4
LT		 2754 return status;
2755}
2756
55a97593 2757int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2758{
2759 struct nfs4_exception exception = { };
2760 int err;
2761 do {
2762 err = nfs4_handle_exception(server,
2763 _nfs4_server_capabilities(server, fhandle),
2764 &exception);
2765 } while (exception.retry);
2766 return err;
2767}
2768
2769static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2770 struct nfs_fsinfo *info)
2771{
aa9c2669 2772 u32 bitmask[3];
1da177e4 2773 struct nfs4_lookup_root_arg args = {
aa9c2669 2774 .bitmask = bitmask,
1da177e4
LT		 2775 };
2776 struct nfs4_lookup_res res = {
2777 .server = server,
0e574af1 2778 .fattr = info->fattr,
1da177e4
LT		 2779 .fh = fhandle,
2780 };
2781 struct rpc_message msg = {
2782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2783 .rpc_argp = &args,
2784 .rpc_resp = &res,
2785 };
008f55d0 2786
aa9c2669
DQ		 2787 bitmask[0] = nfs4_fattr_bitmap[0];
2788 bitmask[1] = nfs4_fattr_bitmap[1];
2789 /*
2790 * Process the label in the upcoming getfattr
2791 */
2792 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2793
0e574af1 2794 nfs_fattr_init(info->fattr);
7c513058 2795 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2796}
2797
2798static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2799 struct nfs_fsinfo *info)
2800{
2801 struct nfs4_exception exception = { };
2802 int err;
2803 do {
fb8a5ba8 2804 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2805 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2806 switch (err) {
2807 case 0:
2808 case -NFS4ERR_WRONGSEC:
05e9cfb4 2809 goto out;
fb8a5ba8
BS		 2810 default:
2811 err = nfs4_handle_exception(server, err, &exception);
2812 }
1da177e4 2813 } while (exception.retry);
05e9cfb4 2814out:
1da177e4
LT		 2815 return err;
2816}
2817
8f70e95f
BS		 2818static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2819 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2820{
c2190661
TM		 2821 struct rpc_auth_create_args auth_args = {
2822 .pseudoflavor = flavor,
2823 };
8f70e95f
BS		 2824 struct rpc_auth *auth;
2825 int ret;
2826
c2190661 2827 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2828 if (IS_ERR(auth)) {
75bc8821 2829 ret = -EACCES;
8f70e95f
BS		 2830 goto out;
2831 }
2832 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2833out:
2834 return ret;
2835}
2836
9a744ba3
CL		 2837/*
2838 * Retry pseudoroot lookup with various security flavors. We do this when:
2839 *
2840 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2841 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2842 *
2843 * Returns zero on success, or a negative NFS4ERR value, or a
2844 * negative errno value.
2845 */
801a16dc 2846static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2847 struct nfs_fsinfo *info)
1da177e4 2848{
9a744ba3
CL		 2849 /* Per 3530bis 15.33.5 */
2850 static const rpc_authflavor_t flav_array[] = {
2851 RPC_AUTH_GSS_KRB5P,
2852 RPC_AUTH_GSS_KRB5I,
2853 RPC_AUTH_GSS_KRB5,
c4eafe11 2854 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2855 RPC_AUTH_NULL,
2856 };
2857 int status = -EPERM;
2858 size_t i;
6a1a1e34 2859
9a744ba3 2860 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2861 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2862 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2863 continue;
2864 break;
8f70e95f 2865 }
9a744ba3 2866
fb8a5ba8
BS		 2867 /*
2868 * -EACCESS could mean that the user doesn't have correct permissions
2869 * to access the mount. It could also mean that we tried to mount
2870 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2871 * existing mount programs don't handle -EACCES very well so it should
2872 * be mapped to -EPERM instead.
2873 */
2874 if (status == -EACCES)
2875 status = -EPERM;
801a16dc
BS		 2876 return status;
2877}
2878
2ed4b95b
CL		 2879static int nfs4_do_find_root_sec(struct nfs_server *server,
2880 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2881{
2882 int mv = server->nfs_client->cl_minorversion;
2883 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2884}
2885
2886/**
2887 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2888 * @server: initialized nfs_server handle
2889 * @fhandle: we fill in the pseudo-fs root file handle
2890 * @info: we fill in an FSINFO struct
5e6b1990 2891 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2892 *
2893 * Returns zero on success, or a negative errno.
801a16dc 2894 */
3028eb2b 2895int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2896 struct nfs_fsinfo *info,
2897 bool auth_probe)
801a16dc 2898{
2ed4b95b
CL		 2899 int status;
2900
5e6b1990
TM		 2901 switch (auth_probe) {
2902 case false:
2903 status = nfs4_lookup_root(server, fhandle, info);
2904 if (status != -NFS4ERR_WRONGSEC)
2905 break;
2906 /* Did user force a 'sec=' mount option? */
2907 if (server->flags & NFS_MOUNT_SECFLAVOUR)
2908 break;
2909 default:
2ed4b95b 2910 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2911 }
2ed4b95b 2912
1da177e4
LT		 2913 if (status == 0)
2914 status = nfs4_server_capabilities(server, fhandle);
2915 if (status == 0)
2916 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2917
c12e87f4 2918 return nfs4_map_errors(status);
1da177e4
LT		 2919}
2920
bae36241
BS		 2921static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2922 struct nfs_fsinfo *info)
2923{
2924 int error;
2925 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2926 struct nfs4_label *label = NULL;
bae36241
BS		 2927
2928 error = nfs4_server_capabilities(server, mntfh);
2929 if (error < 0) {
2930 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2931 return error;
2932 }
2933
14c43f76
DQ		 2934 label = nfs4_label_alloc(server, GFP_KERNEL);
2935 if (IS_ERR(label))
2936 return PTR_ERR(label);
2937
1775fd3e 2938 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2939 if (error < 0) {
2940 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2941 goto err_free_label;
bae36241
BS		 2942 }
2943
2944 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2945 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2946 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2947
14c43f76
DQ		 2948err_free_label:
2949 nfs4_label_free(label);
2950
bae36241
BS		 2951 return error;
2952}
2953
6b97fd3d
MN		 2954/*
2955 * Get locations and (maybe) other attributes of a referral.
2956 * Note that we'll actually follow the referral later when
2957 * we detect fsid mismatch in inode revalidation
2958 */
f05d147f
BS		 2959static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2960 const struct qstr *name, struct nfs_fattr *fattr,
2961 struct nfs_fh *fhandle)
6b97fd3d
MN		 2962{
2963 int status = -ENOMEM;
2964 struct page *page = NULL;
2965 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2966
2967 page = alloc_page(GFP_KERNEL);
2968 if (page == NULL)
2969 goto out;
2970 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2971 if (locations == NULL)
2972 goto out;
2973
f05d147f 2974 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2975 if (status != 0)
2976 goto out;
2977 /* Make sure server returned a different fsid for the referral */
2978 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2979 dprintk("%s: server did not return a different fsid for"
2980 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2981 status = -EIO;
2982 goto out;
2983 }
533eb461
AA		 2984 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2985 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2986
533eb461 2987 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2988 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2989 memset(fhandle, 0, sizeof(struct nfs_fh));
2990out:
2991 if (page)
2992 __free_page(page);
5d7ca35a 2993 kfree(locations);
6b97fd3d
MN		 2994 return status;
2995}
2996
1775fd3e
DQ		 2997static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2998 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2999{
3000 struct nfs4_getattr_arg args = {
3001 .fh = fhandle,
3002 .bitmask = server->attr_bitmask,
3003 };
3004 struct nfs4_getattr_res res = {
3005 .fattr = fattr,
1775fd3e 3006 .label = label,
1da177e4
LT		 3007 .server = server,
3008 };
3009 struct rpc_message msg = {
3010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3011 .rpc_argp = &args,
3012 .rpc_resp = &res,
3013 };
aa9c2669
DQ		 3014
3015 args.bitmask = nfs4_bitmask(server, label);
3016
0e574af1 3017 nfs_fattr_init(fattr);
7c513058 3018 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3019}
3020
1775fd3e
DQ		 3021static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3022 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3023{
3024 struct nfs4_exception exception = { };
3025 int err;
3026 do {
b5f875a9
TM		 3027 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3028 trace_nfs4_getattr(server, fhandle, fattr, err);
3029 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3030 &exception);
3031 } while (exception.retry);
3032 return err;
3033}
3034
3035/*
3036 * The file is not closed if it is opened due to the a request to change
3037 * the size of the file. The open call will not be needed once the
3038 * VFS layer lookup-intents are implemented.
3039 *
3040 * Close is called when the inode is destroyed.
3041 * If we haven't opened the file for O_WRONLY, we
3042 * need to in the size_change case to obtain a stateid.
3043 *
3044 * Got race?
3045 * Because OPEN is always done by name in nfsv4, it is
3046 * possible that we opened a different file by the same
3047 * name. We can recognize this race condition, but we
3048 * can't do anything about it besides returning an error.
3049 *
3050 * This will be fixed with VFS changes (lookup-intent).
3051 */
3052static int
3053nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3054 struct iattr *sattr)
3055{
08e9eac4 3056 struct inode *inode = dentry->d_inode;
659bfcd6 3057 struct rpc_cred *cred = NULL;
d530838b 3058 struct nfs4_state *state = NULL;
14c43f76 3059 struct nfs4_label *label = NULL;
1da177e4
LT		 3060 int status;
3061
8a1636c4 3062 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3063 pnfs_commit_and_return_layout(inode);
8a1636c4 3064
0e574af1 3065 nfs_fattr_init(fattr);
1da177e4 3066
2669940d
AA		 3067 /* Deal with open(O_TRUNC) */
3068 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3069 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3070
3071 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3072 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3073 return 0;
3074
d530838b 3075 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3076 if (sattr->ia_valid & ATTR_FILE) {
3077 struct nfs_open_context *ctx;
3078
3079 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3080 if (ctx) {
3081 cred = ctx->cred;
3082 state = ctx->state;
3083 }
659bfcd6 3084 }
08e9eac4 3085
14c43f76
DQ		 3086 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3087 if (IS_ERR(label))
3088 return PTR_ERR(label);
3089
3090 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3091 if (status == 0) {
65e4308d 3092 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3093 nfs_setsecurity(inode, fattr, label);
3094 }
14c43f76 3095 nfs4_label_free(label);
1da177e4
LT		 3096 return status;
3097}
3098
0c2e53f1
TM		 3099static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3100 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3101 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3102{
0c2e53f1 3103 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3104 int status;
3105 struct nfs4_lookup_arg args = {
3106 .bitmask = server->attr_bitmask,
0c2e53f1 3107 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3108 .name = name,
3109 };
3110 struct nfs4_lookup_res res = {
3111 .server = server,
3112 .fattr = fattr,
aa9c2669 3113 .label = label,
2b3de441
DH		 3114 .fh = fhandle,
3115 };
3116 struct rpc_message msg = {
3117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3118 .rpc_argp = &args,
3119 .rpc_resp = &res,
3120 };
3121
aa9c2669
DQ		 3122 args.bitmask = nfs4_bitmask(server, label);
3123
2b3de441
DH		 3124 nfs_fattr_init(fattr);
3125
1da177e4 3126 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3127 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3128 dprintk("NFS reply lookup: %d\n", status);
3129 return status;
3130}
3131
72de53ec 3132static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3133{
7ebb9315 3134 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3135 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3136 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3137 fattr->nlink = 2;
3138}
3139
72de53ec
BS		 3140static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3141 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3142 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3143{
3144 struct nfs4_exception exception = { };
72de53ec 3145 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3146 int err;
3147 do {
1775fd3e 3148 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3149 trace_nfs4_lookup(dir, name, err);
72de53ec 3150 switch (err) {
08ef7bd3 3151 case -NFS4ERR_BADNAME:
72de53ec
BS		 3152 err = -ENOENT;
3153 goto out;
0c2e53f1 3154 case -NFS4ERR_MOVED:
f05d147f 3155 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3156 goto out;
0c2e53f1 3157 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3158 err = -EPERM;
3159 if (client != *clnt)
3160 goto out;
41d058c3
TM		 3161 /* No security negotiation if the user specified 'sec=' */
3162 if (NFS_SERVER(dir)->flags & NFS_MOUNT_SECFLAVOUR)
3163 goto out;
72de53ec
BS		 3164 client = nfs4_create_sec_client(client, dir, name);
3165 if (IS_ERR(client))
3166 return PTR_ERR(client);
3167
3168 exception.retry = 1;
3169 break;
3170 default:
3171 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3172 }
1da177e4 3173 } while (exception.retry);
72de53ec
BS		 3174
3175out:
3176 if (err == 0)
3177 *clnt = client;
3178 else if (client != *clnt)
3179 rpc_shutdown_client(client);
3180
1da177e4
LT		 3181 return err;
3182}
3183
80a16b21 3184static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3185 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3186 struct nfs4_label *label)
72de53ec
BS		 3187{
3188 int status;
3189 struct rpc_clnt *client = NFS_CLIENT(dir);
3190
1775fd3e 3191 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3192 if (client != NFS_CLIENT(dir)) {
3193 rpc_shutdown_client(client);
3194 nfs_fixup_secinfo_attributes(fattr);
3195 }
3196 return status;
3197}
3198
f05d147f
BS		 3199struct rpc_clnt *
3200nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3201 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3202{
b72888cb 3203 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3204 int status;
f05d147f 3205
1775fd3e 3206 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3207 if (status < 0)
f05d147f 3208 return ERR_PTR(status);
b72888cb 3209 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3210}
3211
1da177e4
LT		 3212static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3213{
76b32999 3214 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3215 struct nfs4_accessargs args = {
3216 .fh = NFS_FH(inode),
a4980e78 3217 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3218 };
3219 struct nfs4_accessres res = {
3220 .server = server,
1da177e4 3221 };
1da177e4
LT		 3222 struct rpc_message msg = {
3223 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3224 .rpc_argp = &args,
3225 .rpc_resp = &res,
3226 .rpc_cred = entry->cred,
3227 };
3228 int mode = entry->mask;
aa9c2669 3229 int status = 0;
1da177e4
LT		 3230
3231 /*
3232 * Determine which access bits we want to ask for...
3233 */
3234 if (mode & MAY_READ)
3235 args.access |= NFS4_ACCESS_READ;
3236 if (S_ISDIR(inode->i_mode)) {
3237 if (mode & MAY_WRITE)
3238 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3239 if (mode & MAY_EXEC)
3240 args.access |= NFS4_ACCESS_LOOKUP;
3241 } else {
3242 if (mode & MAY_WRITE)
3243 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3244 if (mode & MAY_EXEC)
3245 args.access |= NFS4_ACCESS_EXECUTE;
3246 }
c407d41a
TM		 3247
3248 res.fattr = nfs_alloc_fattr();
3249 if (res.fattr == NULL)
3250 return -ENOMEM;
3251
7c513058 3252 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3253 if (!status) {
6168f62c 3254 nfs_access_set_mask(entry, res.access);
c407d41a 3255 nfs_refresh_inode(inode, res.fattr);
1da177e4 3256 }
c407d41a 3257 nfs_free_fattr(res.fattr);
1da177e4
LT		 3258 return status;
3259}
3260
3261static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3262{
3263 struct nfs4_exception exception = { };
3264 int err;
3265 do {
c1578b76
TM		 3266 err = _nfs4_proc_access(inode, entry);
3267 trace_nfs4_access(inode, err);
3268 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3269 &exception);
3270 } while (exception.retry);
3271 return err;
3272}
3273
3274/*
3275 * TODO: For the time being, we don't try to get any attributes
3276 * along with any of the zero-copy operations READ, READDIR,
3277 * READLINK, WRITE.
3278 *
3279 * In the case of the first three, we want to put the GETATTR
3280 * after the read-type operation -- this is because it is hard
3281 * to predict the length of a GETATTR response in v4, and thus
3282 * align the READ data correctly. This means that the GETATTR
3283 * may end up partially falling into the page cache, and we should
3284 * shift it into the 'tail' of the xdr_buf before processing.
3285 * To do this efficiently, we need to know the total length
3286 * of data received, which doesn't seem to be available outside
3287 * of the RPC layer.
3288 *
3289 * In the case of WRITE, we also want to put the GETATTR after
3290 * the operation -- in this case because we want to make sure
140150db 3291 * we get the post-operation mtime and size.
1da177e4
LT		 3292 *
3293 * Both of these changes to the XDR layer would in fact be quite
3294 * minor, but I decided to leave them for a subsequent patch.
3295 */
3296static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3297 unsigned int pgbase, unsigned int pglen)
3298{
3299 struct nfs4_readlink args = {
3300 .fh = NFS_FH(inode),
3301 .pgbase = pgbase,
3302 .pglen = pglen,
3303 .pages = &page,
3304 };
f50c7000 3305 struct nfs4_readlink_res res;
1da177e4
LT		 3306 struct rpc_message msg = {
3307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3308 .rpc_argp = &args,
f50c7000 3309 .rpc_resp = &res,
1da177e4
LT		 3310 };
3311
7c513058 3312 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3313}
3314
3315static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3316 unsigned int pgbase, unsigned int pglen)
3317{
3318 struct nfs4_exception exception = { };
3319 int err;
3320 do {
c1578b76
TM		 3321 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3322 trace_nfs4_readlink(inode, err);
3323 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3324 &exception);
3325 } while (exception.retry);
3326 return err;
3327}
3328
1da177e4 3329/*
8867fe58 3330 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3331 */
1da177e4
LT		 3332static int
3333nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3334 int flags)
1da177e4 3335{
aa9c2669 3336 struct nfs4_label l, *ilabel = NULL;
8867fe58 3337 struct nfs_open_context *ctx;
1da177e4 3338 struct nfs4_state *state;
5bc2afc2 3339 int opened = 0;
1da177e4
LT		 3340 int status = 0;
3341
8867fe58
MS		 3342 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3343 if (IS_ERR(ctx))
3344 return PTR_ERR(ctx);
3345
aa9c2669
DQ		 3346 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3347
a8a5da99 3348 sattr->ia_mode &= ~current_umask();
5bc2afc2 3349 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3350 if (IS_ERR(state)) {
3351 status = PTR_ERR(state);
c0204fd2 3352 goto out;
1da177e4 3353 }
1da177e4 3354out:
aa9c2669 3355 nfs4_label_release_security(ilabel);
8867fe58 3356 put_nfs_open_context(ctx);
1da177e4
LT		 3357 return status;
3358}
3359
3360static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3361{
16e42959 3362 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3363 struct nfs_removeargs args = {
1da177e4 3364 .fh = NFS_FH(dir),
26fe5750 3365 .name = *name,
16e42959 3366 };
4fdc17b2 3367 struct nfs_removeres res = {
16e42959 3368 .server = server,
1da177e4 3369 };
1da177e4 3370 struct rpc_message msg = {
4fdc17b2
TM		 3371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3372 .rpc_argp = &args,
3373 .rpc_resp = &res,
1da177e4 3374 };
778d2817 3375 int status;
1da177e4 3376
7c513058 3377 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3378 if (status == 0)
16e42959 3379 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3380 return status;
3381}
3382
3383static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3384{
3385 struct nfs4_exception exception = { };
3386 int err;
3387 do {
078ea3df
TM		 3388 err = _nfs4_proc_remove(dir, name);
3389 trace_nfs4_remove(dir, name, err);
3390 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3391 &exception);
3392 } while (exception.retry);
3393 return err;
3394}
3395
e4eff1a6 3396static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3397{
e4eff1a6
TM		 3398 struct nfs_server *server = NFS_SERVER(dir);
3399 struct nfs_removeargs *args = msg->rpc_argp;
3400 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3401
e4eff1a6 3402 res->server = server;
1da177e4 3403 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3404 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3405
3406 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3407}
3408
34e137cc
BS		 3409static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3410{
d9afbd1b
TM		 3411 nfs4_setup_sequence(NFS_SERVER(data->dir),
3412 &data->args.seq_args,
3413 &data->res.seq_res,
3414 task);
1da177e4
LT		 3415}
3416
e4eff1a6 3417static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3418{
078ea3df
TM		 3419 struct nfs_unlinkdata *data = task->tk_calldata;
3420 struct nfs_removeres *res = &data->res;
e4eff1a6 3421
14516c3a
TM		 3422 if (!nfs4_sequence_done(task, &res->seq_res))
3423 return 0;
9e33bed5 3424 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3425 return 0;
3426 update_changeattr(dir, &res->cinfo);
e4eff1a6 3427 return 1;
1da177e4
LT		 3428}
3429
d3d4152a
JL		 3430static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3431{
3432 struct nfs_server *server = NFS_SERVER(dir);
3433 struct nfs_renameargs *arg = msg->rpc_argp;
3434 struct nfs_renameres *res = msg->rpc_resp;
3435
3436 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3437 res->server = server;
a9c92d6b 3438 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3439}
3440
c6bfa1a1
BS		 3441static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3442{
d9afbd1b
TM		 3443 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3444 &data->args.seq_args,
3445 &data->res.seq_res,
3446 task);
d3d4152a
JL		 3447}
3448
3449static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3450 struct inode *new_dir)
3451{
fbc6f7c2
TM		 3452 struct nfs_renamedata *data = task->tk_calldata;
3453 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3454
3455 if (!nfs4_sequence_done(task, &res->seq_res))
3456 return 0;
3457 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3458 return 0;
3459
3460 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3461 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3462 return 1;
3463}
3464
1da177e4
LT		 3465static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3466 struct inode *new_dir, struct qstr *new_name)
3467{
6caf2c82 3468 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3469 struct nfs_renameargs arg = {
1da177e4
LT		 3470 .old_dir = NFS_FH(old_dir),
3471 .new_dir = NFS_FH(new_dir),
3472 .old_name = old_name,
3473 .new_name = new_name,
6caf2c82 3474 };
e8582a8b 3475 struct nfs_renameres res = {
6caf2c82 3476 .server = server,
1da177e4 3477 };
1da177e4
LT		 3478 struct rpc_message msg = {
3479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3480 .rpc_argp = &arg,
3481 .rpc_resp = &res,
3482 };
011fff72 3483 int status = -ENOMEM;
14c43f76 3484
7c513058 3485 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3486 if (!status) {
3487 update_changeattr(old_dir, &res.old_cinfo);
3488 update_changeattr(new_dir, &res.new_cinfo);
3489 }
3490 return status;
3491}
3492
3493static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3494 struct inode *new_dir, struct qstr *new_name)
3495{
3496 struct nfs4_exception exception = { };
3497 int err;
3498 do {
fbc6f7c2
TM		 3499 err = _nfs4_proc_rename(old_dir, old_name,
3500 new_dir, new_name);
3501 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3502 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3503 &exception);
3504 } while (exception.retry);
3505 return err;
3506}
3507
3508static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3509{
91ba2eee 3510 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3511 struct nfs4_link_arg arg = {
3512 .fh = NFS_FH(inode),
3513 .dir_fh = NFS_FH(dir),
3514 .name = name,
91ba2eee
TM		 3515 .bitmask = server->attr_bitmask,
3516 };
91ba2eee
TM		 3517 struct nfs4_link_res res = {
3518 .server = server,
1775fd3e 3519 .label = NULL,
1da177e4 3520 };
1da177e4
LT		 3521 struct rpc_message msg = {
3522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3523 .rpc_argp = &arg,
91ba2eee 3524 .rpc_resp = &res,
1da177e4 3525 };
136f2627
TM		 3526 int status = -ENOMEM;
3527
3528 res.fattr = nfs_alloc_fattr();
778d2817 3529 if (res.fattr == NULL)
136f2627 3530 goto out;
1da177e4 3531
14c43f76
DQ		 3532 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3533 if (IS_ERR(res.label)) {
3534 status = PTR_ERR(res.label);
3535 goto out;
3536 }
aa9c2669 3537 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3538
7c513058 3539 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3540 if (!status) {
3541 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3542 status = nfs_post_op_update_inode(inode, res.fattr);
3543 if (!status)
3544 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3545 }
14c43f76
DQ		 3546
3547
3548 nfs4_label_free(res.label);
3549
136f2627 3550out:
136f2627 3551 nfs_free_fattr(res.fattr);
1da177e4
LT		 3552 return status;
3553}
3554
3555static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3556{
3557 struct nfs4_exception exception = { };
3558 int err;
3559 do {
3560 err = nfs4_handle_exception(NFS_SERVER(inode),
3561 _nfs4_proc_link(inode, dir, name),
3562 &exception);
3563 } while (exception.retry);
3564 return err;
3565}
3566
57dc9a57
TM		 3567struct nfs4_createdata {
3568 struct rpc_message msg;
3569 struct nfs4_create_arg arg;
3570 struct nfs4_create_res res;
3571 struct nfs_fh fh;
3572 struct nfs_fattr fattr;
1775fd3e 3573 struct nfs4_label *label;
57dc9a57
TM		 3574};
3575
3576static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3577 struct qstr *name, struct iattr *sattr, u32 ftype)
3578{
3579 struct nfs4_createdata *data;
3580
3581 data = kzalloc(sizeof(*data), GFP_KERNEL);
3582 if (data != NULL) {
3583 struct nfs_server *server = NFS_SERVER(dir);
3584
14c43f76
DQ		 3585 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3586 if (IS_ERR(data->label))
3587 goto out_free;
3588
57dc9a57
TM		 3589 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3590 data->msg.rpc_argp = &data->arg;
3591 data->msg.rpc_resp = &data->res;
3592 data->arg.dir_fh = NFS_FH(dir);
3593 data->arg.server = server;
3594 data->arg.name = name;
3595 data->arg.attrs = sattr;
3596 data->arg.ftype = ftype;
aa9c2669 3597 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3598 data->res.server = server;
3599 data->res.fh = &data->fh;
3600 data->res.fattr = &data->fattr;
1775fd3e 3601 data->res.label = data->label;
57dc9a57 3602 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3603 }
3604 return data;
14c43f76
DQ		 3605out_free:
3606 kfree(data);
3607 return NULL;
57dc9a57
TM		 3608}
3609
3610static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3611{
7c513058 3612 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3613 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3614 if (status == 0) {
3615 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3616 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3617 }
3618 return status;
3619}
3620
3621static void nfs4_free_createdata(struct nfs4_createdata *data)
3622{
14c43f76 3623 nfs4_label_free(data->label);
57dc9a57
TM		 3624 kfree(data);
3625}
3626
4f390c15 3627static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3628 struct page *page, unsigned int len, struct iattr *sattr,
3629 struct nfs4_label *label)
1da177e4 3630{
57dc9a57
TM		 3631 struct nfs4_createdata *data;
3632 int status = -ENAMETOOLONG;
1da177e4 3633
94a6d753 3634 if (len > NFS4_MAXPATHLEN)
57dc9a57 3635 goto out;
4f390c15 3636
57dc9a57
TM		 3637 status = -ENOMEM;
3638 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3639 if (data == NULL)
3640 goto out;
3641
3642 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3643 data->arg.u.symlink.pages = &page;
3644 data->arg.u.symlink.len = len;
1775fd3e 3645 data->arg.label = label;
1da177e4 3646
57dc9a57
TM		 3647 status = nfs4_do_create(dir, dentry, data);
3648
3649 nfs4_free_createdata(data);
3650out:
1da177e4
LT		 3651 return status;
3652}
3653
4f390c15 3654static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3655 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3656{
3657 struct nfs4_exception exception = { };
aa9c2669 3658 struct nfs4_label l, *label = NULL;
1da177e4 3659 int err;
aa9c2669
DQ		 3660
3661 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3662
1da177e4 3663 do {
078ea3df
TM		 3664 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3665 trace_nfs4_symlink(dir, &dentry->d_name, err);
3666 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3667 &exception);
3668 } while (exception.retry);
aa9c2669
DQ		 3669
3670 nfs4_label_release_security(label);
1da177e4
LT		 3671 return err;
3672}
3673
3674static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3675 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3676{
57dc9a57
TM		 3677 struct nfs4_createdata *data;
3678 int status = -ENOMEM;
1da177e4 3679
57dc9a57
TM		 3680 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3681 if (data == NULL)
3682 goto out;
3683
1775fd3e 3684 data->arg.label = label;
57dc9a57
TM		 3685 status = nfs4_do_create(dir, dentry, data);
3686
3687 nfs4_free_createdata(data);
3688out:
1da177e4
LT		 3689 return status;
3690}
3691
3692static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3693 struct iattr *sattr)
3694{
3695 struct nfs4_exception exception = { };
aa9c2669 3696 struct nfs4_label l, *label = NULL;
1da177e4 3697 int err;
a8a5da99 3698
aa9c2669
DQ		 3699 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3700
a8a5da99 3701 sattr->ia_mode &= ~current_umask();
1da177e4 3702 do {
078ea3df
TM		 3703 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3704 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3705 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3706 &exception);
3707 } while (exception.retry);
aa9c2669
DQ		 3708 nfs4_label_release_security(label);
3709
1da177e4
LT		 3710 return err;
3711}
3712
3713static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3714 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3715{
3716 struct inode *dir = dentry->d_inode;
3717 struct nfs4_readdir_arg args = {
3718 .fh = NFS_FH(dir),
56e4ebf8 3719 .pages = pages,
1da177e4
LT		 3720 .pgbase = 0,
3721 .count = count,
96d25e53 3722 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3723 .plus = plus,
1da177e4
LT		 3724 };
3725 struct nfs4_readdir_res res;
3726 struct rpc_message msg = {
3727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3728 .rpc_argp = &args,
3729 .rpc_resp = &res,
3730 .rpc_cred = cred,
3731 };
3732 int status;
3733
3110ff80 3734 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3735 dentry->d_parent->d_name.name,
3736 dentry->d_name.name,
3737 (unsigned long long)cookie);
c3f52af3 3738 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3739 res.pgbase = args.pgbase;
7c513058 3740 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3741 if (status >= 0) {
c3f52af3 3742 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3743 status += args.pgbase;
3744 }
c4812998
TM		 3745
3746 nfs_invalidate_atime(dir);
3747
3110ff80 3748 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3749 return status;
3750}
3751
3752static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3753 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3754{
3755 struct nfs4_exception exception = { };
3756 int err;
3757 do {
c1578b76
TM		 3758 err = _nfs4_proc_readdir(dentry, cred, cookie,
3759 pages, count, plus);
3760 trace_nfs4_readdir(dentry->d_inode, err);
3761 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3762 &exception);
3763 } while (exception.retry);
3764 return err;
3765}
3766
3767static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3768 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3769{
57dc9a57
TM		 3770 struct nfs4_createdata *data;
3771 int mode = sattr->ia_mode;
3772 int status = -ENOMEM;
1da177e4 3773
57dc9a57
TM		 3774 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3775 if (data == NULL)
3776 goto out;
3777
1da177e4 3778 if (S_ISFIFO(mode))
57dc9a57 3779 data->arg.ftype = NF4FIFO;
1da177e4 3780 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3781 data->arg.ftype = NF4BLK;
3782 data->arg.u.device.specdata1 = MAJOR(rdev);
3783 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3784 }
3785 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3786 data->arg.ftype = NF4CHR;
3787 data->arg.u.device.specdata1 = MAJOR(rdev);
3788 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3789 } else if (!S_ISSOCK(mode)) {
3790 status = -EINVAL;
3791 goto out_free;
1da177e4 3792 }
1775fd3e 3793
aa9c2669 3794 data->arg.label = label;
57dc9a57 3795 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3796out_free:
57dc9a57
TM		 3797 nfs4_free_createdata(data);
3798out:
1da177e4
LT		 3799 return status;
3800}
3801
3802static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3803 struct iattr *sattr, dev_t rdev)
3804{
3805 struct nfs4_exception exception = { };
aa9c2669 3806 struct nfs4_label l, *label = NULL;
1da177e4 3807 int err;
a8a5da99 3808
aa9c2669
DQ		 3809 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3810
a8a5da99 3811 sattr->ia_mode &= ~current_umask();
1da177e4 3812 do {
078ea3df
TM		 3813 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3814 trace_nfs4_mknod(dir, &dentry->d_name, err);
3815 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3816 &exception);
3817 } while (exception.retry);
aa9c2669
DQ		 3818
3819 nfs4_label_release_security(label);
3820
1da177e4
LT		 3821 return err;
3822}
3823
3824static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3825 struct nfs_fsstat *fsstat)
3826{
3827 struct nfs4_statfs_arg args = {
3828 .fh = fhandle,
3829 .bitmask = server->attr_bitmask,
3830 };
24ad148a
BH		 3831 struct nfs4_statfs_res res = {
3832 .fsstat = fsstat,
3833 };
1da177e4
LT		 3834 struct rpc_message msg = {
3835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3836 .rpc_argp = &args,
24ad148a 3837 .rpc_resp = &res,
1da177e4
LT		 3838 };
3839
0e574af1 3840 nfs_fattr_init(fsstat->fattr);
7c513058 3841 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3842}
3843
3844static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3845{
3846 struct nfs4_exception exception = { };
3847 int err;
3848 do {
3849 err = nfs4_handle_exception(server,
3850 _nfs4_proc_statfs(server, fhandle, fsstat),
3851 &exception);
3852 } while (exception.retry);
3853 return err;
3854}
3855
3856static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3857 struct nfs_fsinfo *fsinfo)
3858{
3859 struct nfs4_fsinfo_arg args = {
3860 .fh = fhandle,
3861 .bitmask = server->attr_bitmask,
3862 };
3dda5e43
BH		 3863 struct nfs4_fsinfo_res res = {
3864 .fsinfo = fsinfo,
3865 };
1da177e4
LT		 3866 struct rpc_message msg = {
3867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3868 .rpc_argp = &args,
3dda5e43 3869 .rpc_resp = &res,
1da177e4
LT		 3870 };
3871
7c513058 3872 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3873}
3874
3875static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3876{
3877 struct nfs4_exception exception = { };
83ca7f5a 3878 unsigned long now = jiffies;
1da177e4
LT		 3879 int err;
3880
3881 do {
83ca7f5a 3882 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3883 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3884 if (err == 0) {
3885 struct nfs_client *clp = server->nfs_client;
3886
3887 spin_lock(&clp->cl_lock);
3888 clp->cl_lease_time = fsinfo->lease_time * HZ;
3889 clp->cl_last_renewal = now;
3890 spin_unlock(&clp->cl_lock);
3891 break;
3892 }
3893 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3894 } while (exception.retry);
3895 return err;
3896}
3897
3898static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3899{
e38eb650
BS		 3900 int error;
3901
0e574af1 3902 nfs_fattr_init(fsinfo->fattr);
e38eb650 3903 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3904 if (error == 0) {
3905 /* block layout checks this! */
3906 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3907 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3908 }
e38eb650
BS		 3909
3910 return error;
1da177e4
LT		 3911}
3912
3913static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3914 struct nfs_pathconf *pathconf)
3915{
3916 struct nfs4_pathconf_arg args = {
3917 .fh = fhandle,
3918 .bitmask = server->attr_bitmask,
3919 };
d45b2989
BH		 3920 struct nfs4_pathconf_res res = {
3921 .pathconf = pathconf,
3922 };
1da177e4
LT		 3923 struct rpc_message msg = {
3924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3925 .rpc_argp = &args,
d45b2989 3926 .rpc_resp = &res,
1da177e4
LT		 3927 };
3928
3929 /* None of the pathconf attributes are mandatory to implement */
3930 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3931 memset(pathconf, 0, sizeof(*pathconf));
3932 return 0;
3933 }
3934
0e574af1 3935 nfs_fattr_init(pathconf->fattr);
7c513058 3936 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3937}
3938
3939static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3940 struct nfs_pathconf *pathconf)
3941{
3942 struct nfs4_exception exception = { };
3943 int err;
3944
3945 do {
3946 err = nfs4_handle_exception(server,
3947 _nfs4_proc_pathconf(server, fhandle, pathconf),
3948 &exception);
3949 } while (exception.retry);
3950 return err;
3951}
3952
5521abfd 3953int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3954 const struct nfs_open_context *ctx,
3955 const struct nfs_lock_context *l_ctx,
3956 fmode_t fmode)
3957{
3958 const struct nfs_lockowner *lockowner = NULL;
3959
3960 if (l_ctx != NULL)
3961 lockowner = &l_ctx->lockowner;
5521abfd 3962 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3963}
3964EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3965
5521abfd
TM		 3966static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3967 const struct nfs_open_context *ctx,
3968 const struct nfs_lock_context *l_ctx,
3969 fmode_t fmode)
3970{
3971 nfs4_stateid current_stateid;
3972
3973 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3974 return false;
3975 return nfs4_stateid_match(stateid, &current_stateid);
3976}
3977
3978static bool nfs4_error_stateid_expired(int err)
3979{
3980 switch (err) {
3981 case -NFS4ERR_DELEG_REVOKED:
3982 case -NFS4ERR_ADMIN_REVOKED:
3983 case -NFS4ERR_BAD_STATEID:
3984 case -NFS4ERR_STALE_STATEID:
3985 case -NFS4ERR_OLD_STATEID:
3986 case -NFS4ERR_OPENMODE:
3987 case -NFS4ERR_EXPIRED:
3988 return true;
3989 }
3990 return false;
3991}
3992
d20581aa
BH		 3993void __nfs4_read_done_cb(struct nfs_read_data *data)
3994{
cd841605 3995 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3996}
3997
cbdabc7f 3998static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3999{
cd841605 4000 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4001
cc668ab3 4002 trace_nfs4_read(data, task->tk_status);
9e33bed5 4003 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4004 rpc_restart_call_prepare(task);
ec06c096 4005 return -EAGAIN;
1da177e4 4006 }
8850df99 4007
d20581aa 4008 __nfs4_read_done_cb(data);
1da177e4 4009 if (task->tk_status > 0)
ec06c096
TM		 4010 renew_lease(server, data->timestamp);
4011 return 0;
1da177e4
LT		 4012}
4013
5521abfd
TM		 4014static bool nfs4_read_stateid_changed(struct rpc_task *task,
4015 struct nfs_readargs *args)
4016{
4017
4018 if (!nfs4_error_stateid_expired(task->tk_status) ||
4019 nfs4_stateid_is_current(&args->stateid,
4020 args->context,
4021 args->lock_context,
4022 FMODE_READ))
4023 return false;
4024 rpc_restart_call_prepare(task);
4025 return true;
4026}
4027
cbdabc7f
AA		 4028static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4029{
4030
4031 dprintk("--> %s\n", __func__);
4032
4033 if (!nfs4_sequence_done(task, &data->res.seq_res))
4034 return -EAGAIN;
5521abfd
TM		 4035 if (nfs4_read_stateid_changed(task, &data->args))
4036 return -EAGAIN;
d20581aa
BH		 4037 return data->read_done_cb ? data->read_done_cb(task, data) :
4038 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4039}
4040
bdc7f021 4041static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4042{
1da177e4 4043 data->timestamp = jiffies;
cbdabc7f 4044 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4045 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4046 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4047}
4048
ef1820f9 4049static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4050{
9b206149 4051 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4052 &data->args.seq_args,
4053 &data->res.seq_res,
9b206149 4054 task))
ef1820f9
N		 4055 return 0;
4056 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4057 data->args.lock_context, FMODE_READ) == -EIO)
4058 return -EIO;
4059 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4060 return -EIO;
4061 return 0;
1da177e4
LT		 4062}
4063
b029bc9b 4064static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4065{
cd841605 4066 struct inode *inode = data->header->inode;
1da177e4 4067
cc668ab3 4068 trace_nfs4_write(data, task->tk_status);
9e33bed5 4069 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4070 rpc_restart_call_prepare(task);
788e7a89 4071 return -EAGAIN;
1da177e4 4072 }
4f9838c7 4073 if (task->tk_status >= 0) {
1da177e4 4074 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4075 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4076 }
788e7a89 4077 return 0;
1da177e4
LT		 4078}
4079
5521abfd
TM		 4080static bool nfs4_write_stateid_changed(struct rpc_task *task,
4081 struct nfs_writeargs *args)
4082{
4083
4084 if (!nfs4_error_stateid_expired(task->tk_status) ||
4085 nfs4_stateid_is_current(&args->stateid,
4086 args->context,
4087 args->lock_context,
4088 FMODE_WRITE))
4089 return false;
4090 rpc_restart_call_prepare(task);
4091 return true;
4092}
4093
b029bc9b
FI		 4094static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4095{
4096 if (!nfs4_sequence_done(task, &data->res.seq_res))
4097 return -EAGAIN;
5521abfd
TM		 4098 if (nfs4_write_stateid_changed(task, &data->args))
4099 return -EAGAIN;
d20581aa
BH		 4100 return data->write_done_cb ? data->write_done_cb(task, data) :
4101 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4102}
4103
5a37f851
TM		 4104static
4105bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4106{
5a37f851
TM		 4107 const struct nfs_pgio_header *hdr = data->header;
4108
4109 /* Don't request attributes for pNFS or O_DIRECT writes */
4110 if (data->ds_clp != NULL || hdr->dreq != NULL)
4111 return false;
4112 /* Otherwise, request attributes if and only if we don't hold
4113 * a delegation
4114 */
011e2a7f 4115 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4116}
a69aef14 4117
bdc7f021 4118static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4119{
cd841605 4120 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4121
5a37f851 4122 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4123 data->args.bitmask = NULL;
4124 data->res.fattr = NULL;
4125 } else
4126 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4127
b029bc9b
FI		 4128 if (!data->write_done_cb)
4129 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4130 data->res.server = server;
1da177e4
LT		 4131 data->timestamp = jiffies;
4132
bdc7f021 4133 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4134 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4135}
4136
ef1820f9 4137static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4138{
9b206149 4139 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4140 &data->args.seq_args,
4141 &data->res.seq_res,
9b206149 4142 task))
ef1820f9
N		 4143 return 0;
4144 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4145 data->args.lock_context, FMODE_WRITE) == -EIO)
4146 return -EIO;
4147 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4148 return -EIO;
4149 return 0;
1da177e4
LT		 4150}
4151
0b7c0153 4152static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4153{
d9afbd1b
TM		 4154 nfs4_setup_sequence(NFS_SERVER(data->inode),
4155 &data->args.seq_args,
4156 &data->res.seq_res,
4157 task);
1da177e4
LT		 4158}
4159
0b7c0153 4160static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4161{
1da177e4 4162 struct inode *inode = data->inode;
14516c3a 4163
cc668ab3 4164 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4165 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4166 rpc_restart_call_prepare(task);
788e7a89 4167 return -EAGAIN;
1da177e4 4168 }
788e7a89 4169 return 0;
1da177e4
LT		 4170}
4171
0b7c0153 4172static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4173{
4174 if (!nfs4_sequence_done(task, &data->res.seq_res))
4175 return -EAGAIN;
0b7c0153 4176 return data->commit_done_cb(task, data);
5f452431
FI		 4177}
4178
0b7c0153 4179static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4180{
788e7a89 4181 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4182
0b7c0153
FI		 4183 if (data->commit_done_cb == NULL)
4184 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4185 data->res.server = server;
bdc7f021 4186 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4187 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4188}
4189
9bc4e3ca
CL		 4190struct nfs4_renewdata {
4191 struct nfs_client *client;
4192 unsigned long timestamp;
4193};
4194
1da177e4
LT		 4195/*
4196 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4197 * standalone procedure for queueing an asynchronous RENEW.
4198 */
9bc4e3ca 4199static void nfs4_renew_release(void *calldata)
dc96aef9 4200{
9bc4e3ca
CL		 4201 struct nfs4_renewdata *data = calldata;
4202 struct nfs_client *clp = data->client;
dc96aef9 4203
0851de06
AB		 4204 if (atomic_read(&clp->cl_count) > 1)
4205 nfs4_schedule_state_renewal(clp);
4206 nfs_put_client(clp);
9bc4e3ca 4207 kfree(data);
dc96aef9
AB		 4208}
4209
9bc4e3ca 4210static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4211{
9bc4e3ca
CL		 4212 struct nfs4_renewdata *data = calldata;
4213 struct nfs_client *clp = data->client;
4214 unsigned long timestamp = data->timestamp;
1da177e4 4215
c6d01c6f 4216 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4217 if (task->tk_status < 0) {
95baa25c 4218 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4219 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4220 return;
4221 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4222 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4223 return;
4224 }
4225 nfs4_schedule_path_down_recovery(clp);
1da177e4 4226 }
452e9352 4227 do_renew_lease(clp, timestamp);
1da177e4
LT		 4228}
4229
963d8fe5
TM		 4230static const struct rpc_call_ops nfs4_renew_ops = {
4231 .rpc_call_done = nfs4_renew_done,
dc96aef9 4232 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4233};
4234
2f60ea6b 4235static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4236{
4237 struct rpc_message msg = {
4238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4239 .rpc_argp = clp,
b4454fe1 4240 .rpc_cred = cred,
1da177e4 4241 };
9bc4e3ca 4242 struct nfs4_renewdata *data;
1da177e4 4243
2f60ea6b
TM		 4244 if (renew_flags == 0)
4245 return 0;
0851de06
AB		 4246 if (!atomic_inc_not_zero(&clp->cl_count))
4247 return -EIO;
b569ad34 4248 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4249 if (data == NULL)
4250 return -ENOMEM;
4251 data->client = clp;
4252 data->timestamp = jiffies;
bc7a05ca 4253 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4254 &nfs4_renew_ops, data);
1da177e4
LT		 4255}
4256
8534d4ec 4257static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4258{
4259 struct rpc_message msg = {
4260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4261 .rpc_argp = clp,
b4454fe1 4262 .rpc_cred = cred,
1da177e4
LT		 4263 };
4264 unsigned long now = jiffies;
4265 int status;
4266
bc7a05ca 4267 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4268 if (status < 0)
4269 return status;
452e9352 4270 do_renew_lease(clp, now);
1da177e4
LT		 4271 return 0;
4272}
4273
aa1870af
BF		 4274static inline int nfs4_server_supports_acls(struct nfs_server *server)
4275{
4276 return (server->caps & NFS_CAP_ACLS)
4277 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4278 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4279}
4280
21f498c2
TM		 4281/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4282 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4283 * the stack.
4284 */
21f498c2 4285#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4286
e9e3d724
NH		 4287static int buf_to_pages_noslab(const void *buf, size_t buflen,
4288 struct page **pages, unsigned int *pgbase)
4289{
4290 struct page *newpage, **spages;
4291 int rc = 0;
4292 size_t len;
4293 spages = pages;
4294
4295 do {
21f498c2 4296 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4297 newpage = alloc_page(GFP_KERNEL);
4298
4299 if (newpage == NULL)
4300 goto unwind;
4301 memcpy(page_address(newpage), buf, len);
4302 buf += len;
4303 buflen -= len;
4304 *pages++ = newpage;
4305 rc++;
4306 } while (buflen != 0);
4307
4308 return rc;
4309
4310unwind:
4311 for(; rc > 0; rc--)
4312 __free_page(spages[rc-1]);
4313 return -ENOMEM;
4314}
4315
e50a1c2e
BF		 4316struct nfs4_cached_acl {
4317 int cached;
4318 size_t len;
3e9d4154 4319 char data[0];
e50a1c2e
BF		 4320};
4321
4322static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4323{
4324 struct nfs_inode *nfsi = NFS_I(inode);
4325
4326 spin_lock(&inode->i_lock);
4327 kfree(nfsi->nfs4_acl);
4328 nfsi->nfs4_acl = acl;
4329 spin_unlock(&inode->i_lock);
4330}
4331
4332static void nfs4_zap_acl_attr(struct inode *inode)
4333{
4334 nfs4_set_cached_acl(inode, NULL);
4335}
4336
4337static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4338{
4339 struct nfs_inode *nfsi = NFS_I(inode);
4340 struct nfs4_cached_acl *acl;
4341 int ret = -ENOENT;
4342
4343 spin_lock(&inode->i_lock);
4344 acl = nfsi->nfs4_acl;
4345 if (acl == NULL)
4346 goto out;
4347 if (buf == NULL) /* user is just asking for length */
4348 goto out_len;
4349 if (acl->cached == 0)
4350 goto out;
4351 ret = -ERANGE; /* see getxattr(2) man page */
4352 if (acl->len > buflen)
4353 goto out;
4354 memcpy(buf, acl->data, acl->len);
4355out_len:
4356 ret = acl->len;
4357out:
4358 spin_unlock(&inode->i_lock);
4359 return ret;
4360}
4361
5794d21e 4362static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4363{
4364 struct nfs4_cached_acl *acl;
b291f1b1 4365 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4366
1f1ea6c2 4367 if (buflen <= PAGE_SIZE) {
b291f1b1 4368 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4369 if (acl == NULL)
4370 goto out;
4371 acl->cached = 1;
5794d21e 4372 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4373 } else {
4374 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4375 if (acl == NULL)
4376 goto out;
4377 acl->cached = 0;
4378 }
4379 acl->len = acl_len;
4380out:
4381 nfs4_set_cached_acl(inode, acl);
4382}
4383
bf118a34
AA		 4384/*
4385 * The getxattr API returns the required buffer length when called with a
4386 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4387 * the required buf. On a NULL buf, we send a page of data to the server
4388 * guessing that the ACL request can be serviced by a page. If so, we cache
4389 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4390 * the cache. If not so, we throw away the page, and cache the required
4391 * length. The next getxattr call will then produce another round trip to
4392 * the server, this time with the input buf of the required size.
4393 */
16b4289c 4394static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4395{
bf118a34 4396 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4397 struct nfs_getaclargs args = {
4398 .fh = NFS_FH(inode),
4399 .acl_pages = pages,
4400 .acl_len = buflen,
4401 };
663c79b3
BH		 4402 struct nfs_getaclres res = {
4403 .acl_len = buflen,
4404 };
aa1870af
BF		 4405 struct rpc_message msg = {
4406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4407 .rpc_argp = &args,
663c79b3 4408 .rpc_resp = &res,
aa1870af 4409 };
21f498c2
TM		 4410 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4411 int ret = -ENOMEM, i;
aa1870af 4412
bf118a34
AA		 4413 /* As long as we're doing a round trip to the server anyway,
4414 * let's be prepared for a page of acl data. */
4415 if (npages == 0)
4416 npages = 1;
21f498c2
TM		 4417 if (npages > ARRAY_SIZE(pages))
4418 return -ERANGE;
5a006899 4419
bf118a34
AA		 4420 for (i = 0; i < npages; i++) {
4421 pages[i] = alloc_page(GFP_KERNEL);
4422 if (!pages[i])
4423 goto out_free;
e50a1c2e 4424 }
5a006899
SP		 4425
4426 /* for decoding across pages */
4427 res.acl_scratch = alloc_page(GFP_KERNEL);
4428 if (!res.acl_scratch)
4429 goto out_free;
4430
bf118a34
AA		 4431 args.acl_len = npages * PAGE_SIZE;
4432 args.acl_pgbase = 0;
5a006899 4433
de040bec 4434 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4435 __func__, buf, buflen, npages, args.acl_len);
4436 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4437 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4438 if (ret)
4439 goto out_free;
bf118a34 4440
1f1ea6c2
TM		 4441 /* Handle the case where the passed-in buffer is too short */
4442 if (res.acl_flags & NFS4_ACL_TRUNC) {
4443 /* Did the user only issue a request for the acl length? */
4444 if (buf == NULL)
4445 goto out_ok;
e50a1c2e 4446 ret = -ERANGE;
1f1ea6c2 4447 goto out_free;
e50a1c2e 4448 }
1f1ea6c2 4449 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4450 if (buf) {
4451 if (res.acl_len > buflen) {
4452 ret = -ERANGE;
4453 goto out_free;
4454 }
1f1ea6c2 4455 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4456 }
1f1ea6c2
TM		 4457out_ok:
4458 ret = res.acl_len;
e50a1c2e 4459out_free:
bf118a34
AA		 4460 for (i = 0; i < npages; i++)
4461 if (pages[i])
4462 __free_page(pages[i]);
331818f1
TM		 4463 if (res.acl_scratch)
4464 __free_page(res.acl_scratch);
aa1870af
BF		 4465 return ret;
4466}
4467
16b4289c
TM		 4468static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4469{
4470 struct nfs4_exception exception = { };
4471 ssize_t ret;
4472 do {
4473 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4474 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4475 if (ret >= 0)
4476 break;
4477 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4478 } while (exception.retry);
4479 return ret;
4480}
4481
e50a1c2e
BF		 4482static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4483{
4484 struct nfs_server *server = NFS_SERVER(inode);
4485 int ret;
4486
4487 if (!nfs4_server_supports_acls(server))
4488 return -EOPNOTSUPP;
4489 ret = nfs_revalidate_inode(server, inode);
4490 if (ret < 0)
4491 return ret;
08a22b39
AK		 4492 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4493 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4494 ret = nfs4_read_cached_acl(inode, buf, buflen);
4495 if (ret != -ENOENT)
bf118a34
AA		 4496 /* -ENOENT is returned if there is no ACL or if there is an ACL
4497 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4498 return ret;
4499 return nfs4_get_acl_uncached(inode, buf, buflen);
4500}
4501
16b4289c 4502static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4503{
4504 struct nfs_server *server = NFS_SERVER(inode);
4505 struct page *pages[NFS4ACL_MAXPAGES];
4506 struct nfs_setaclargs arg = {
4507 .fh = NFS_FH(inode),
4508 .acl_pages = pages,
4509 .acl_len = buflen,
4510 };
73c403a9 4511 struct nfs_setaclres res;
4b580ee3
BF		 4512 struct rpc_message msg = {
4513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4514 .rpc_argp = &arg,
73c403a9 4515 .rpc_resp = &res,
4b580ee3 4516 };
21f498c2 4517 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4518 int ret, i;
4b580ee3
BF		 4519
4520 if (!nfs4_server_supports_acls(server))
4521 return -EOPNOTSUPP;
21f498c2
TM		 4522 if (npages > ARRAY_SIZE(pages))
4523 return -ERANGE;
e9e3d724
NH		 4524 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4525 if (i < 0)
4526 return i;
57ec14c5 4527 nfs4_inode_return_delegation(inode);
7c513058 4528 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4529
4530 /*
4531 * Free each page after tx, so the only ref left is
4532 * held by the network stack
4533 */
4534 for (; i > 0; i--)
4535 put_page(pages[i-1]);
4536
08a22b39
AK		 4537 /*
4538 * Acl update can result in inode attribute update.
4539 * so mark the attribute cache invalid.
4540 */
4541 spin_lock(&inode->i_lock);
4542 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4543 spin_unlock(&inode->i_lock);
f41f7418
TM		 4544 nfs_access_zap_cache(inode);
4545 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4546 return ret;
4547}
4548
16b4289c
TM		 4549static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4550{
4551 struct nfs4_exception exception = { };
4552 int err;
4553 do {
c1578b76
TM		 4554 err = __nfs4_proc_set_acl(inode, buf, buflen);
4555 trace_nfs4_set_acl(inode, err);
4556 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4557 &exception);
4558 } while (exception.retry);
4559 return err;
4560}
4561
aa9c2669
DQ		 4562#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4563static int _nfs4_get_security_label(struct inode *inode, void *buf,
4564 size_t buflen)
4565{
4566 struct nfs_server *server = NFS_SERVER(inode);
4567 struct nfs_fattr fattr;
4568 struct nfs4_label label = {0, 0, buflen, buf};
4569
4570 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4571 struct nfs4_getattr_arg args = {
4572 .fh = NFS_FH(inode),
4573 .bitmask = bitmask,
4574 };
4575 struct nfs4_getattr_res res = {
4576 .fattr = &fattr,
4577 .label = &label,
4578 .server = server,
4579 };
4580 struct rpc_message msg = {
4581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4582 .rpc_argp = &args,
4583 .rpc_resp = &res,
4584 };
4585 int ret;
4586
4587 nfs_fattr_init(&fattr);
4588
4589 ret = rpc_call_sync(server->client, &msg, 0);
4590 if (ret)
4591 return ret;
4592 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4593 return -ENOENT;
4594 if (buflen < label.len)
4595 return -ERANGE;
4596 return 0;
4597}
4598
4599static int nfs4_get_security_label(struct inode *inode, void *buf,
4600 size_t buflen)
4601{
4602 struct nfs4_exception exception = { };
4603 int err;
4604
4605 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4606 return -EOPNOTSUPP;
4607
4608 do {
c1578b76
TM		 4609 err = _nfs4_get_security_label(inode, buf, buflen);
4610 trace_nfs4_get_security_label(inode, err);
4611 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4612 &exception);
4613 } while (exception.retry);
4614 return err;
4615}
4616
4617static int _nfs4_do_set_security_label(struct inode *inode,
4618 struct nfs4_label *ilabel,
4619 struct nfs_fattr *fattr,
4620 struct nfs4_label *olabel)
4621{
4622
4623 struct iattr sattr = {0};
4624 struct nfs_server *server = NFS_SERVER(inode);
4625 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4626 struct nfs_setattrargs args = {
4627 .fh = NFS_FH(inode),
4628 .iap = &sattr,
4629 .server = server,
4630 .bitmask = bitmask,
4631 .label = ilabel,
4632 };
4633 struct nfs_setattrres res = {
4634 .fattr = fattr,
4635 .label = olabel,
4636 .server = server,
4637 };
4638 struct rpc_message msg = {
4639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4640 .rpc_argp = &args,
4641 .rpc_resp = &res,
4642 };
4643 int status;
4644
4645 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4646
4647 status = rpc_call_sync(server->client, &msg, 0);
4648 if (status)
4649 dprintk("%s failed: %d\n", __func__, status);
4650
4651 return status;
4652}
4653
4654static int nfs4_do_set_security_label(struct inode *inode,
4655 struct nfs4_label *ilabel,
4656 struct nfs_fattr *fattr,
4657 struct nfs4_label *olabel)
4658{
4659 struct nfs4_exception exception = { };
4660 int err;
4661
4662 do {
c1578b76
TM		 4663 err = _nfs4_do_set_security_label(inode, ilabel,
4664 fattr, olabel);
4665 trace_nfs4_set_security_label(inode, err);
4666 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4667 &exception);
4668 } while (exception.retry);
4669 return err;
4670}
4671
4672static int
4673nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4674{
4675 struct nfs4_label ilabel, *olabel = NULL;
4676 struct nfs_fattr fattr;
4677 struct rpc_cred *cred;
4678 struct inode *inode = dentry->d_inode;
4679 int status;
4680
4681 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4682 return -EOPNOTSUPP;
4683
4684 nfs_fattr_init(&fattr);
4685
4686 ilabel.pi = 0;
4687 ilabel.lfs = 0;
4688 ilabel.label = (char *)buf;
4689 ilabel.len = buflen;
4690
4691 cred = rpc_lookup_cred();
4692 if (IS_ERR(cred))
4693 return PTR_ERR(cred);
4694
4695 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4696 if (IS_ERR(olabel)) {
4697 status = -PTR_ERR(olabel);
4698 goto out;
4699 }
4700
4701 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4702 if (status == 0)
4703 nfs_setsecurity(inode, &fattr, olabel);
4704
4705 nfs4_label_free(olabel);
4706out:
4707 put_rpccred(cred);
4708 return status;
4709}
4710#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4711
4712
1da177e4 4713static int
aa5190d0 4714nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4715{
aa5190d0
TM		 4716 struct nfs_client *clp = server->nfs_client;
4717
4718 if (task->tk_status >= 0)
1da177e4
LT		 4719 return 0;
4720 switch(task->tk_status) {
a1d0b5ee 4721 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4722 case -NFS4ERR_ADMIN_REVOKED:
4723 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4724 if (state == NULL)
4725 break;
4726 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4727 case -NFS4ERR_OPENMODE:
4728 if (state == NULL)
4729 break;
5d422301
TM		 4730 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4731 goto stateid_invalid;
0400a6b0 4732 goto wait_on_recovery;
0ced63d1 4733 case -NFS4ERR_EXPIRED:
5d422301
TM		 4734 if (state != NULL) {
4735 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4736 goto stateid_invalid;
4737 }
1da177e4 4738 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4739 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4740 nfs4_schedule_lease_recovery(clp);
4741 goto wait_on_recovery;
4745e315
AA		 4742#if defined(CONFIG_NFS_V4_1)
4743 case -NFS4ERR_BADSESSION:
4744 case -NFS4ERR_BADSLOT:
4745 case -NFS4ERR_BAD_HIGH_SLOT:
4746 case -NFS4ERR_DEADSESSION:
4747 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4748 case -NFS4ERR_SEQ_FALSE_RETRY:
4749 case -NFS4ERR_SEQ_MISORDERED:
4750 dprintk("%s ERROR %d, Reset session\n", __func__,
4751 task->tk_status);
9f594791 4752 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4753 task->tk_status = 0;
4754 return -EAGAIN;
4755#endif /* CONFIG_NFS_V4_1 */
1da177e4 4756 case -NFS4ERR_DELAY:
aa5190d0 4757 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4758 case -NFS4ERR_GRACE:
1da177e4
LT		 4759 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4760 task->tk_status = 0;
4761 return -EAGAIN;
a8a4ae3a 4762 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4763 case -NFS4ERR_OLD_STATEID:
4764 task->tk_status = 0;
4765 return -EAGAIN;
4766 }
4767 task->tk_status = nfs4_map_errors(task->tk_status);
4768 return 0;
5d422301
TM		 4769stateid_invalid:
4770 task->tk_status = -EIO;
4771 return 0;
0400a6b0 4772wait_on_recovery:
a2c0b9e2 4773 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4774 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4775 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4776 task->tk_status = 0;
4777 return -EAGAIN;
1da177e4
LT		 4778}
4779
f092075d
CL		 4780static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4781 nfs4_verifier *bootverf)
cd93710e
CL		 4782{
4783 __be32 verf[2];
4784
2c820d9a
CL		 4785 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4786 /* An impossible timestamp guarantees this value
4787 * will never match a generated boot time. */
4788 verf[0] = 0;
17f26b12 4789 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4790 } else {
f092075d 4791 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4792 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4793 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4794 }
cd93710e
CL		 4795 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4796}
4797
e984a55a
CL		 4798static unsigned int
4799nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4800 char *buf, size_t len)
4801{
4802 unsigned int result;
4803
4804 rcu_read_lock();
4805 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4806 clp->cl_ipaddr,
4807 rpc_peeraddr2str(clp->cl_rpcclient,
4808 RPC_DISPLAY_ADDR),
4809 rpc_peeraddr2str(clp->cl_rpcclient,
4810 RPC_DISPLAY_PROTO));
4811 rcu_read_unlock();
4812 return result;
4813}
4814
4815static unsigned int
4816nfs4_init_uniform_client_string(const struct nfs_client *clp,
4817 char *buf, size_t len)
4818{
55b59293 4819 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4820
4821 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4822 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4823 clp->rpc_ops->version,
4824 clp->cl_minorversion,
4825 nfs4_client_id_uniquifier,
4826 nodename);
e984a55a
CL		 4827 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4828 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4829 nodename);
e984a55a
CL		 4830}
4831
6bbb4ae8
CL		 4832/**
4833 * nfs4_proc_setclientid - Negotiate client ID
4834 * @clp: state data structure
4835 * @program: RPC program for NFSv4 callback service
4836 * @port: IP port number for NFS4 callback service
4837 * @cred: RPC credential to use for this call
4838 * @res: where to place the result
4839 *
4840 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4841 */
bb8b27e5
TM		 4842int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4843 unsigned short port, struct rpc_cred *cred,
4844 struct nfs4_setclientid_res *res)
1da177e4
LT		 4845{
4846 nfs4_verifier sc_verifier;
4847 struct nfs4_setclientid setclientid = {
4848 .sc_verifier = &sc_verifier,
4849 .sc_prog = program,
f4eecd5d 4850 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4851 };
4852 struct rpc_message msg = {
4853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4854 .rpc_argp = &setclientid,
bb8b27e5 4855 .rpc_resp = res,
286d7d6a 4856 .rpc_cred = cred,
1da177e4 4857 };
6bbb4ae8 4858 int status;
1da177e4 4859
de734831 4860 /* nfs_client_id4 */
f092075d 4861 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4862 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4863 setclientid.sc_name_len =
4864 nfs4_init_uniform_client_string(clp,
4865 setclientid.sc_name,
4866 sizeof(setclientid.sc_name));
4867 else
4868 setclientid.sc_name_len =
4869 nfs4_init_nonuniform_client_string(clp,
4870 setclientid.sc_name,
4871 sizeof(setclientid.sc_name));
de734831 4872 /* cb_client4 */
e984a55a 4873 rcu_read_lock();
de734831 4874 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4875 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4876 rpc_peeraddr2str(clp->cl_rpcclient,
4877 RPC_DISPLAY_NETID));
de734831
CL		 4878 rcu_read_unlock();
4879 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4880 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4881 clp->cl_ipaddr, port >> 8, port & 255);
4882
6bbb4ae8
CL		 4883 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4884 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4885 setclientid.sc_name_len, setclientid.sc_name);
4886 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4887 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4888 dprintk("NFS reply setclientid: %d\n", status);
4889 return status;
1da177e4
LT		 4890}
4891
6bbb4ae8
CL		 4892/**
4893 * nfs4_proc_setclientid_confirm - Confirm client ID
4894 * @clp: state data structure
4895 * @res: result of a previous SETCLIENTID
4896 * @cred: RPC credential to use for this call
4897 *
4898 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4899 */
fd954ae1 4900int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4901 struct nfs4_setclientid_res *arg,
4902 struct rpc_cred *cred)
1da177e4 4903{
1da177e4
LT		 4904 struct rpc_message msg = {
4905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4906 .rpc_argp = arg,
286d7d6a 4907 .rpc_cred = cred,
1da177e4 4908 };
1da177e4
LT		 4909 int status;
4910
6bbb4ae8
CL		 4911 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4912 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4913 clp->cl_clientid);
1bd714f2 4914 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4915 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4916 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4917 return status;
4918}
4919
fe650407
TM		 4920struct nfs4_delegreturndata {
4921 struct nfs4_delegreturnargs args;
fa178f29 4922 struct nfs4_delegreturnres res;
fe650407
TM		 4923 struct nfs_fh fh;
4924 nfs4_stateid stateid;
26e976a8 4925 unsigned long timestamp;
fa178f29 4926 struct nfs_fattr fattr;
fe650407
TM		 4927 int rpc_status;
4928};
4929
fe650407
TM		 4930static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4931{
4932 struct nfs4_delegreturndata *data = calldata;
938e1010 4933
14516c3a
TM		 4934 if (!nfs4_sequence_done(task, &data->res.seq_res))
4935 return;
938e1010 4936
ca8acf8d 4937 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4938 switch (task->tk_status) {
4939 case -NFS4ERR_STALE_STATEID:
4940 case -NFS4ERR_EXPIRED:
4941 case 0:
fa178f29 4942 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4943 break;
4944 default:
4945 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4946 -EAGAIN) {
d00c5d43 4947 rpc_restart_call_prepare(task);
79708861
RL		 4948 return;
4949 }
4950 }
4951 data->rpc_status = task->tk_status;
fe650407
TM		 4952}
4953
4954static void nfs4_delegreturn_release(void *calldata)
4955{
fe650407
TM		 4956 kfree(calldata);
4957}
4958
938e1010
AA		 4959static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4960{
4961 struct nfs4_delegreturndata *d_data;
4962
4963 d_data = (struct nfs4_delegreturndata *)data;
4964
d9afbd1b
TM		 4965 nfs4_setup_sequence(d_data->res.server,
4966 &d_data->args.seq_args,
4967 &d_data->res.seq_res,
4968 task);
938e1010 4969}
938e1010 4970
c8d149f3 4971static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4972 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 4973 .rpc_call_done = nfs4_delegreturn_done,
4974 .rpc_release = nfs4_delegreturn_release,
4975};
4976
e6f81075 4977static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4978{
4979 struct nfs4_delegreturndata *data;
fa178f29 4980 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4981 struct rpc_task *task;
5138fde0
TM		 4982 struct rpc_message msg = {
4983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4984 .rpc_cred = cred,
4985 };
c970aa85
TM		 4986 struct rpc_task_setup task_setup_data = {
4987 .rpc_client = server->client,
5138fde0 4988 .rpc_message = &msg,
c970aa85
TM		 4989 .callback_ops = &nfs4_delegreturn_ops,
4990 .flags = RPC_TASK_ASYNC,
4991 };
e6f81075 4992 int status = 0;
fe650407 4993
8535b2be 4994 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4995 if (data == NULL)
4996 return -ENOMEM;
a9c92d6b 4997 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4998 data->args.fhandle = &data->fh;
4999 data->args.stateid = &data->stateid;
9e907fec 5000 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5001 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5002 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5003 data->res.fattr = &data->fattr;
5004 data->res.server = server;
5138fde0 5005 nfs_fattr_init(data->res.fattr);
26e976a8 5006 data->timestamp = jiffies;
fe650407
TM		 5007 data->rpc_status = 0;
5008
c970aa85 5009 task_setup_data.callback_data = data;
1174dd1f
TM		 5010 msg.rpc_argp = &data->args;
5011 msg.rpc_resp = &data->res;
c970aa85 5012 task = rpc_run_task(&task_setup_data);
7a1218a2 5013 if (IS_ERR(task))
fe650407 5014 return PTR_ERR(task);
e6f81075
TM		 5015 if (!issync)
5016 goto out;
fe650407 5017 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5018 if (status != 0)
5019 goto out;
5020 status = data->rpc_status;
e144cbcc
TM		 5021 if (status == 0)
5022 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5023 else
5024 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5025out:
e6b3c4db 5026 rpc_put_task(task);
fe650407 5027 return status;
1da177e4
LT		 5028}
5029
e6f81075 5030int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5031{
5032 struct nfs_server *server = NFS_SERVER(inode);
5033 struct nfs4_exception exception = { };
5034 int err;
5035 do {
e6f81075 5036 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5037 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5038 switch (err) {
5039 case -NFS4ERR_STALE_STATEID:
5040 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5041 case 0:
5042 return 0;
5043 }
5044 err = nfs4_handle_exception(server, err, &exception);
5045 } while (exception.retry);
5046 return err;
5047}
5048
5049#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5050#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5051
5052/*
5053 * sleep, with exponential backoff, and retry the LOCK operation.
5054 */
5055static unsigned long
5056nfs4_set_lock_task_retry(unsigned long timeout)
5057{
416ad3c9 5058 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5059 timeout <<= 1;
5060 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5061 return NFS4_LOCK_MAXTIMEOUT;
5062 return timeout;
5063}
5064
1da177e4
LT		 5065static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5066{
5067 struct inode *inode = state->inode;
5068 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5069 struct nfs_client *clp = server->nfs_client;
911d1aaf 5070 struct nfs_lockt_args arg = {
1da177e4 5071 .fh = NFS_FH(inode),
911d1aaf 5072 .fl = request,
1da177e4 5073 };
911d1aaf
TM		 5074 struct nfs_lockt_res res = {
5075 .denied = request,
1da177e4
LT		 5076 };
5077 struct rpc_message msg = {
5078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5079 .rpc_argp = &arg,
5080 .rpc_resp = &res,
5081 .rpc_cred = state->owner->so_cred,
5082 };
1da177e4
LT		 5083 struct nfs4_lock_state *lsp;
5084 int status;
5085
911d1aaf 5086 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5087 status = nfs4_set_lock_state(state, request);
5088 if (status != 0)
5089 goto out;
5090 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5091 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5092 arg.lock_owner.s_dev = server->s_dev;
7c513058 5093 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5094 switch (status) {
5095 case 0:
5096 request->fl_type = F_UNLCK;
5097 break;
5098 case -NFS4ERR_DENIED:
5099 status = 0;
1da177e4 5100 }
70cc6487 5101 request->fl_ops->fl_release_private(request);
a6f951dd 5102 request->fl_ops = NULL;
8d0a8a9d 5103out:
1da177e4
LT		 5104 return status;
5105}
5106
5107static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5108{
5109 struct nfs4_exception exception = { };
5110 int err;
5111
5112 do {
d1b748a5
TM		 5113 err = _nfs4_proc_getlk(state, cmd, request);
5114 trace_nfs4_get_lock(request, state, cmd, err);
5115 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5116 &exception);
5117 } while (exception.retry);
5118 return err;
5119}
5120
5121static int do_vfs_lock(struct file *file, struct file_lock *fl)
5122{
5123 int res = 0;
5124 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5125 case FL_POSIX:
5126 res = posix_lock_file_wait(file, fl);
5127 break;
5128 case FL_FLOCK:
5129 res = flock_lock_file_wait(file, fl);
5130 break;
5131 default:
5132 BUG();
5133 }
1da177e4
LT		 5134 return res;
5135}
5136
faf5f49c 5137struct nfs4_unlockdata {
911d1aaf
TM		 5138 struct nfs_locku_args arg;
5139 struct nfs_locku_res res;
faf5f49c
TM		 5140 struct nfs4_lock_state *lsp;
5141 struct nfs_open_context *ctx;
911d1aaf
TM		 5142 struct file_lock fl;
5143 const struct nfs_server *server;
26e976a8 5144 unsigned long timestamp;
faf5f49c
TM		 5145};
5146
911d1aaf
TM		 5147static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5148 struct nfs_open_context *ctx,
5149 struct nfs4_lock_state *lsp,
5150 struct nfs_seqid *seqid)
5151{
5152 struct nfs4_unlockdata *p;
5153 struct inode *inode = lsp->ls_state->inode;
5154
8535b2be 5155 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5156 if (p == NULL)
5157 return NULL;
5158 p->arg.fh = NFS_FH(inode);
5159 p->arg.fl = &p->fl;
5160 p->arg.seqid = seqid;
c1d51931 5161 p->res.seqid = seqid;
911d1aaf
TM		 5162 p->arg.stateid = &lsp->ls_stateid;
5163 p->lsp = lsp;
5164 atomic_inc(&lsp->ls_count);
5165 /* Ensure we don't close file until we're done freeing locks! */
5166 p->ctx = get_nfs_open_context(ctx);
5167 memcpy(&p->fl, fl, sizeof(p->fl));
5168 p->server = NFS_SERVER(inode);
5169 return p;
5170}
5171
06f814a3 5172static void nfs4_locku_release_calldata(void *data)
faf5f49c 5173{
963d8fe5 5174 struct nfs4_unlockdata *calldata = data;
911d1aaf 5175 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5176 nfs4_put_lock_state(calldata->lsp);
5177 put_nfs_open_context(calldata->ctx);
5178 kfree(calldata);
faf5f49c
TM		 5179}
5180
963d8fe5 5181static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5182{
963d8fe5 5183 struct nfs4_unlockdata *calldata = data;
faf5f49c 5184
14516c3a
TM		 5185 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5186 return;
faf5f49c
TM		 5187 switch (task->tk_status) {
5188 case 0:
f597c537
TM		 5189 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5190 &calldata->res.stateid);
26e976a8 5191 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5192 break;
9e33bed5
TM		 5193 case -NFS4ERR_BAD_STATEID:
5194 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5195 case -NFS4ERR_STALE_STATEID:
5196 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5197 break;
5198 default:
9e33bed5 5199 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5200 rpc_restart_call_prepare(task);
faf5f49c 5201 }
2b1bc308 5202 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5203}
5204
4ce70ada 5205static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5206{
4ce70ada 5207 struct nfs4_unlockdata *calldata = data;
faf5f49c 5208
911d1aaf 5209 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5210 goto out_wait;
795a88c9 5211 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5212 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5213 goto out_no_action;
faf5f49c 5214 }
26e976a8 5215 calldata->timestamp = jiffies;
035168ab 5216 if (nfs4_setup_sequence(calldata->server,
a893693c 5217 &calldata->arg.seq_args,
2240a9e2
TM		 5218 &calldata->res.seq_res,
5219 task) != 0)
5220 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5221 return;
5222out_no_action:
5223 task->tk_action = NULL;
5224out_wait:
5225 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5226}
5227
963d8fe5 5228static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5229 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5230 .rpc_call_done = nfs4_locku_done,
06f814a3 5231 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5232};
5233
a5d16a4d
TM		 5234static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5235 struct nfs_open_context *ctx,
5236 struct nfs4_lock_state *lsp,
5237 struct nfs_seqid *seqid)
5238{
5239 struct nfs4_unlockdata *data;
5138fde0
TM		 5240 struct rpc_message msg = {
5241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5242 .rpc_cred = ctx->cred,
5243 };
c970aa85
TM		 5244 struct rpc_task_setup task_setup_data = {
5245 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5246 .rpc_message = &msg,
c970aa85 5247 .callback_ops = &nfs4_locku_ops,
101070ca 5248 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5249 .flags = RPC_TASK_ASYNC,
5250 };
a5d16a4d 5251
fa940720
WAA		 5252 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5253 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5254
137d6aca
FF		 5255 /* Ensure this is an unlock - when canceling a lock, the
5256 * canceled lock is passed in, and it won't be an unlock.
5257 */
5258 fl->fl_type = F_UNLCK;
5259
a5d16a4d
TM		 5260 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5261 if (data == NULL) {
5262 nfs_free_seqid(seqid);
5263 return ERR_PTR(-ENOMEM);
5264 }
5265
a9c92d6b 5266 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5267 msg.rpc_argp = &data->arg;
5268 msg.rpc_resp = &data->res;
c970aa85
TM		 5269 task_setup_data.callback_data = data;
5270 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5271}
5272
faf5f49c
TM		 5273static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5274{
65b62a29
TM		 5275 struct inode *inode = state->inode;
5276 struct nfs4_state_owner *sp = state->owner;
5277 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5278 struct nfs_seqid *seqid;
1da177e4 5279 struct nfs4_lock_state *lsp;
06f814a3
TM		 5280 struct rpc_task *task;
5281 int status = 0;
536ff0f8 5282 unsigned char fl_flags = request->fl_flags;
faf5f49c 5283
8d0a8a9d 5284 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5285 /* Unlock _before_ we do the RPC call */
5286 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5287 /* Exclude nfs_delegation_claim_locks() */
5288 mutex_lock(&sp->so_delegreturn_mutex);
5289 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5290 down_read(&nfsi->rwsem);
5291 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5292 up_read(&nfsi->rwsem);
65b62a29 5293 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5294 goto out;
19e03c57
TM		 5295 }
5296 up_read(&nfsi->rwsem);
65b62a29 5297 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5298 if (status != 0)
9b073574
TM		 5299 goto out;
5300 /* Is this a delegated lock? */
8d0a8a9d 5301 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5302 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5303 goto out;
8535b2be 5304 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5305 status = -ENOMEM;
911d1aaf 5306 if (seqid == NULL)
9b073574 5307 goto out;
cd3758e3 5308 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5309 status = PTR_ERR(task);
5310 if (IS_ERR(task))
9b073574 5311 goto out;
a5d16a4d 5312 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5313 rpc_put_task(task);
9b073574 5314out:
536ff0f8 5315 request->fl_flags = fl_flags;
d1b748a5 5316 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5317 return status;
5318}
5319
a5d16a4d
TM		 5320struct nfs4_lockdata {
5321 struct nfs_lock_args arg;
5322 struct nfs_lock_res res;
5323 struct nfs4_lock_state *lsp;
5324 struct nfs_open_context *ctx;
5325 struct file_lock fl;
26e976a8 5326 unsigned long timestamp;
a5d16a4d
TM		 5327 int rpc_status;
5328 int cancelled;
66179efe 5329 struct nfs_server *server;
a5d16a4d
TM		 5330};
5331
5332static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5333 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5334 gfp_t gfp_mask)
1da177e4 5335{
a5d16a4d
TM		 5336 struct nfs4_lockdata *p;
5337 struct inode *inode = lsp->ls_state->inode;
1da177e4 5338 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5339
8535b2be 5340 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5341 if (p == NULL)
5342 return NULL;
5343
5344 p->arg.fh = NFS_FH(inode);
5345 p->arg.fl = &p->fl;
8535b2be 5346 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5347 if (p->arg.open_seqid == NULL)
5348 goto out_free;
8535b2be 5349 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5350 if (p->arg.lock_seqid == NULL)
2f74c0a0 5351 goto out_free_seqid;
a5d16a4d 5352 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5353 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5354 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5355 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5356 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5357 p->lsp = lsp;
66179efe 5358 p->server = server;
a5d16a4d
TM		 5359 atomic_inc(&lsp->ls_count);
5360 p->ctx = get_nfs_open_context(ctx);
5361 memcpy(&p->fl, fl, sizeof(p->fl));
5362 return p;
2f74c0a0
TM		 5363out_free_seqid:
5364 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5365out_free:
5366 kfree(p);
5367 return NULL;
5368}
5369
5370static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5371{
5372 struct nfs4_lockdata *data = calldata;
5373 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5374
3110ff80 5375 dprintk("%s: begin!\n", __func__);
2f74c0a0 5376 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5377 goto out_wait;
a5d16a4d
TM		 5378 /* Do we need to do an open_to_lock_owner? */
5379 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5380 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5381 goto out_release_lock_seqid;
8fe72bac 5382 }
8e472f33 5383 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5384 data->arg.new_lock_owner = 1;
c1d51931 5385 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5386 } else
5387 data->arg.new_lock_owner = 0;
5d422301
TM		 5388 if (!nfs4_valid_open_stateid(state)) {
5389 data->rpc_status = -EBADF;
5390 task->tk_action = NULL;
5391 goto out_release_open_seqid;
5392 }
26e976a8 5393 data->timestamp = jiffies;
035168ab
TM		 5394 if (nfs4_setup_sequence(data->server,
5395 &data->arg.seq_args,
2240a9e2 5396 &data->res.seq_res,
d9afbd1b 5397 task) == 0)
66179efe 5398 return;
5d422301 5399out_release_open_seqid:
2240a9e2
TM		 5400 nfs_release_seqid(data->arg.open_seqid);
5401out_release_lock_seqid:
5402 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5403out_wait:
5404 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5405 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5406}
5407
a5d16a4d
TM		 5408static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5409{
5410 struct nfs4_lockdata *data = calldata;
5411
3110ff80 5412 dprintk("%s: begin!\n", __func__);
a5d16a4d 5413
14516c3a
TM		 5414 if (!nfs4_sequence_done(task, &data->res.seq_res))
5415 return;
66179efe 5416
a5d16a4d 5417 data->rpc_status = task->tk_status;
a5d16a4d 5418 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5419 if (data->rpc_status == 0)
5420 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5421 else
5422 goto out;
5423 }
5424 if (data->rpc_status == 0) {
f597c537 5425 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5426 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5427 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5428 }
a5d16a4d 5429out:
3110ff80 5430 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5431}
5432
5433static void nfs4_lock_release(void *calldata)
5434{
5435 struct nfs4_lockdata *data = calldata;
5436
3110ff80 5437 dprintk("%s: begin!\n", __func__);
2f74c0a0 5438 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5439 if (data->cancelled != 0) {
5440 struct rpc_task *task;
5441 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5442 data->arg.lock_seqid);
5443 if (!IS_ERR(task))
bf294b41 5444 rpc_put_task_async(task);
3110ff80 5445 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5446 } else
5447 nfs_free_seqid(data->arg.lock_seqid);
5448 nfs4_put_lock_state(data->lsp);
5449 put_nfs_open_context(data->ctx);
5450 kfree(data);
3110ff80 5451 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5452}
5453
5454static const struct rpc_call_ops nfs4_lock_ops = {
5455 .rpc_call_prepare = nfs4_lock_prepare,
5456 .rpc_call_done = nfs4_lock_done,
5457 .rpc_release = nfs4_lock_release,
5458};
5459
2bee72a6
TM		 5460static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5461{
2bee72a6
TM		 5462 switch (error) {
5463 case -NFS4ERR_ADMIN_REVOKED:
5464 case -NFS4ERR_BAD_STATEID:
ecac799a 5465 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5466 if (new_lock_owner != 0 ||
795a88c9 5467 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5468 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5469 break;
5470 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5471 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5472 case -NFS4ERR_EXPIRED:
5473 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5474 };
5475}
5476
afe6c27c 5477static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5478{
5479 struct nfs4_lockdata *data;
5480 struct rpc_task *task;
5138fde0
TM		 5481 struct rpc_message msg = {
5482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5483 .rpc_cred = state->owner->so_cred,
5484 };
c970aa85
TM		 5485 struct rpc_task_setup task_setup_data = {
5486 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5487 .rpc_message = &msg,
c970aa85 5488 .callback_ops = &nfs4_lock_ops,
101070ca 5489 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5490 .flags = RPC_TASK_ASYNC,
5491 };
a5d16a4d
TM		 5492 int ret;
5493
3110ff80 5494 dprintk("%s: begin!\n", __func__);
cd3758e3 5495 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5496 fl->fl_u.nfs4_fl.owner,
5497 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5498 if (data == NULL)
5499 return -ENOMEM;
5500 if (IS_SETLKW(cmd))
5501 data->arg.block = 1;
a9c92d6b 5502 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5503 msg.rpc_argp = &data->arg;
5504 msg.rpc_resp = &data->res;
c970aa85 5505 task_setup_data.callback_data = data;
8fe72bac
TM		 5506 if (recovery_type > NFS_LOCK_NEW) {
5507 if (recovery_type == NFS_LOCK_RECLAIM)
5508 data->arg.reclaim = NFS_LOCK_RECLAIM;
5509 nfs4_set_sequence_privileged(&data->arg.seq_args);
5510 }
c970aa85 5511 task = rpc_run_task(&task_setup_data);
7a1218a2 5512 if (IS_ERR(task))
a5d16a4d 5513 return PTR_ERR(task);
a5d16a4d
TM		 5514 ret = nfs4_wait_for_completion_rpc_task(task);
5515 if (ret == 0) {
5516 ret = data->rpc_status;
2bee72a6
TM		 5517 if (ret)
5518 nfs4_handle_setlk_error(data->server, data->lsp,
5519 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5520 } else
5521 data->cancelled = 1;
e6b3c4db 5522 rpc_put_task(task);
3110ff80 5523 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5524 return ret;
1da177e4
LT		 5525}
5526
5527static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5528{
202b50dc 5529 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5530 struct nfs4_exception exception = {
5531 .inode = state->inode,
5532 };
202b50dc
TM		 5533 int err;
5534
5535 do {
42a2d13e
TM		 5536 /* Cache the lock if possible... */
5537 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5538 return 0;
afe6c27c 5539 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5540 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5541 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5542 break;
5543 nfs4_handle_exception(server, err, &exception);
5544 } while (exception.retry);
5545 return err;
1da177e4
LT		 5546}
5547
5548static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5549{
202b50dc 5550 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5551 struct nfs4_exception exception = {
5552 .inode = state->inode,
5553 };
202b50dc
TM		 5554 int err;
5555
6bfc93ef
TM		 5556 err = nfs4_set_lock_state(state, request);
5557 if (err != 0)
5558 return err;
f6de7a39 5559 if (!recover_lost_locks) {
ef1820f9
N		 5560 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5561 return 0;
5562 }
202b50dc 5563 do {
42a2d13e
TM		 5564 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5565 return 0;
afe6c27c 5566 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5567 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5568 switch (err) {
5569 default:
5570 goto out;
5571 case -NFS4ERR_GRACE:
5572 case -NFS4ERR_DELAY:
5573 nfs4_handle_exception(server, err, &exception);
5574 err = 0;
5575 }
202b50dc 5576 } while (exception.retry);
a9ed2e25 5577out:
202b50dc 5578 return err;
1da177e4
LT		 5579}
5580
f062eb6c 5581#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5582/**
5583 * nfs41_check_expired_locks - possibly free a lock stateid
5584 *
5585 * @state: NFSv4 state for an inode
5586 *
5587 * Returns NFS_OK if recovery for this stateid is now finished.
5588 * Otherwise a negative NFS4ERR value is returned.
5589 */
b01dd1d8 5590static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5591{
eb64cf96 5592 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5593 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5594 struct nfs_server *server = NFS_SERVER(state->inode);
5595
b01dd1d8 5596 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5597 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5598 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5599
5600 status = nfs41_test_stateid(server,
5601 &lsp->ls_stateid,
5602 cred);
08cb47fa 5603 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5604 if (status != NFS_OK) {
3e60ffdd
CL		 5605 /* Free the stateid unless the server
5606 * informs us the stateid is unrecognized. */
89af2739
CL		 5607 if (status != -NFS4ERR_BAD_STATEID)
5608 nfs41_free_stateid(server,
ab7cb0df
TM		 5609 &lsp->ls_stateid,
5610 cred);
795a88c9 5611 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5612 ret = status;
5613 }
5614 }
5615 };
5616
5617 return ret;
5618}
5619
5620static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5621{
5622 int status = NFS_OK;
5623
5624 if (test_bit(LK_STATE_IN_USE, &state->flags))
5625 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5626 if (status != NFS_OK)
5627 status = nfs4_lock_expired(state, request);
5628 return status;
f062eb6c
BS		 5629}
5630#endif
5631
1da177e4
LT		 5632static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5633{
9a99af49 5634 struct nfs4_state_owner *sp = state->owner;
19e03c57 5635 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5636 unsigned char fl_flags = request->fl_flags;
9a99af49 5637 unsigned int seq;
8e469ebd 5638 int status = -ENOLCK;
1da177e4 5639
8e469ebd
TM		 5640 if ((fl_flags & FL_POSIX) &&
5641 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5642 goto out;
6bfc93ef 5643 /* Is this a delegated open? */
6bfc93ef
TM		 5644 status = nfs4_set_lock_state(state, request);
5645 if (status != 0)
5646 goto out;
01c3b861
TM		 5647 request->fl_flags |= FL_ACCESS;
5648 status = do_vfs_lock(request->fl_file, request);
5649 if (status < 0)
5650 goto out;
19e03c57 5651 down_read(&nfsi->rwsem);
01c3b861 5652 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5653 /* Yes: cache locks! */
01c3b861 5654 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5655 request->fl_flags = fl_flags & ~FL_SLEEP;
5656 status = do_vfs_lock(request->fl_file, request);
5657 goto out_unlock;
01c3b861 5658 }
9a99af49
TM		 5659 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5660 up_read(&nfsi->rwsem);
afe6c27c 5661 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5662 if (status != 0)
9a99af49
TM		 5663 goto out;
5664 down_read(&nfsi->rwsem);
5665 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5666 status = -NFS4ERR_DELAY;
01c3b861 5667 goto out_unlock;
9a99af49 5668 }
6bfc93ef 5669 /* Note: we always want to sleep here! */
01c3b861 5670 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5671 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5672 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5673 "manager!\n", __func__);
01c3b861 5674out_unlock:
19e03c57 5675 up_read(&nfsi->rwsem);
01c3b861
TM		 5676out:
5677 request->fl_flags = fl_flags;
1da177e4
LT		 5678 return status;
5679}
5680
5681static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5682{
a1d0b5ee
TM		 5683 struct nfs4_exception exception = {
5684 .state = state,
05ffe24f 5685 .inode = state->inode,
a1d0b5ee 5686 };
1da177e4
LT		 5687 int err;
5688
5689 do {
965b5d67 5690 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5691 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5692 if (err == -NFS4ERR_DENIED)
5693 err = -EAGAIN;
1da177e4 5694 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5695 err, &exception);
1da177e4
LT		 5696 } while (exception.retry);
5697 return err;
5698}
5699
5700static int
5701nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5702{
5703 struct nfs_open_context *ctx;
5704 struct nfs4_state *state;
5705 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5706 int status;
5707
5708 /* verify open state */
cd3758e3 5709 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5710 state = ctx->state;
5711
5712 if (request->fl_start < 0 || request->fl_end < 0)
5713 return -EINVAL;
5714
d953126a
TM		 5715 if (IS_GETLK(cmd)) {
5716 if (state != NULL)
5717 return nfs4_proc_getlk(state, F_GETLK, request);
5718 return 0;
5719 }
1da177e4
LT		 5720
5721 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5722 return -EINVAL;
5723
d953126a
TM		 5724 if (request->fl_type == F_UNLCK) {
5725 if (state != NULL)
5726 return nfs4_proc_unlck(state, cmd, request);
5727 return 0;
5728 }
1da177e4 5729
d953126a
TM		 5730 if (state == NULL)
5731 return -ENOLCK;
55725513
TM		 5732 /*
5733 * Don't rely on the VFS having checked the file open mode,
5734 * since it won't do this for flock() locks.
5735 */
f44106e2 5736 switch (request->fl_type) {
55725513
TM		 5737 case F_RDLCK:
5738 if (!(filp->f_mode & FMODE_READ))
5739 return -EBADF;
5740 break;
5741 case F_WRLCK:
5742 if (!(filp->f_mode & FMODE_WRITE))
5743 return -EBADF;
5744 }
5745
1da177e4
LT		 5746 do {
5747 status = nfs4_proc_setlk(state, cmd, request);
5748 if ((status != -EAGAIN) || IS_SETLK(cmd))
5749 break;
5750 timeout = nfs4_set_lock_task_retry(timeout);
5751 status = -ERESTARTSYS;
5752 if (signalled())
5753 break;
5754 } while(status < 0);
1da177e4
LT		 5755 return status;
5756}
5757
db4f2e63 5758int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5759{
5760 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5761 int err;
5762
5763 err = nfs4_set_lock_state(state, fl);
5764 if (err != 0)
db4f2e63 5765 return err;
4a706fa0 5766 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5767 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5768}
6b3b5496 5769
cf470c3e
TM		 5770struct nfs_release_lockowner_data {
5771 struct nfs4_lock_state *lsp;
5ae67c4f 5772 struct nfs_server *server;
cf470c3e 5773 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5774 struct nfs4_sequence_args seq_args;
5775 struct nfs4_sequence_res seq_res;
cf470c3e
TM		 5776};
5777
fbd4bfd1
CL		 5778static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5779{
5780 struct nfs_release_lockowner_data *data = calldata;
5781 nfs40_setup_sequence(data->server,
5782 &data->seq_args, &data->seq_res, task);
5783}
5784
5785static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5786{
5787 struct nfs_release_lockowner_data *data = calldata;
5788 nfs40_sequence_done(task, &data->seq_res);
5789}
5790
d3c7b7cc
TM		 5791static void nfs4_release_lockowner_release(void *calldata)
5792{
cf470c3e 5793 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5794 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5795 kfree(calldata);
5796}
5797
17280175 5798static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5799 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5800 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5801 .rpc_release = nfs4_release_lockowner_release,
5802};
5803
c8b2d0bf 5804static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5805{
cf470c3e 5806 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5807 struct rpc_message msg = {
5808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5809 };
5810
5811 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5812 return -EINVAL;
fbd4bfd1 5813
cf470c3e
TM		 5814 data = kmalloc(sizeof(*data), GFP_NOFS);
5815 if (!data)
5816 return -ENOMEM;
fbd4bfd1 5817 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5818 data->lsp = lsp;
5ae67c4f 5819 data->server = server;
cf470c3e
TM		 5820 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5821 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5822 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5823
cf470c3e
TM		 5824 msg.rpc_argp = &data->args;
5825 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5826 return 0;
d3c7b7cc
TM		 5827}
5828
aa1870af
BF		 5829#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5830
64c2ce8b
AK		 5831static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5832 const void *buf, size_t buflen,
5833 int flags, int type)
6b3b5496 5834{
64c2ce8b
AK		 5835 if (strcmp(key, "") != 0)
5836 return -EINVAL;
4b580ee3 5837
64c2ce8b 5838 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5839}
5840
64c2ce8b
AK		 5841static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5842 void *buf, size_t buflen, int type)
6b3b5496 5843{
64c2ce8b
AK		 5844 if (strcmp(key, "") != 0)
5845 return -EINVAL;
aa1870af 5846
64c2ce8b 5847 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5848}
5849
64c2ce8b
AK		 5850static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5851 size_t list_len, const char *name,
5852 size_t name_len, int type)
6b3b5496 5853{
64c2ce8b 5854 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5855
096455a2
BF		 5856 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5857 return 0;
64c2ce8b
AK		 5858
5859 if (list && len <= list_len)
5860 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5861 return len;
6b3b5496
BF		 5862}
5863
c9bccef6
DQ		 5864#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5865static inline int nfs4_server_supports_labels(struct nfs_server *server)
5866{
5867 return server->caps & NFS_CAP_SECURITY_LABEL;
5868}
5869
5870static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5871 const void *buf, size_t buflen,
5872 int flags, int type)
5873{
5874 if (security_ismaclabel(key))
5875 return nfs4_set_security_label(dentry, buf, buflen);
5876
5877 return -EOPNOTSUPP;
5878}
5879
5880static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5881 void *buf, size_t buflen, int type)
5882{
5883 if (security_ismaclabel(key))
5884 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5885 return -EOPNOTSUPP;
5886}
5887
5888static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5889 size_t list_len, const char *name,
5890 size_t name_len, int type)
5891{
5892 size_t len = 0;
5893
5894 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5895 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5896 if (list && len <= list_len)
5897 security_inode_listsecurity(dentry->d_inode, list, len);
5898 }
5899 return len;
5900}
5901
5902static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5903 .prefix = XATTR_SECURITY_PREFIX,
5904 .list = nfs4_xattr_list_nfs4_label,
5905 .get = nfs4_xattr_get_nfs4_label,
5906 .set = nfs4_xattr_set_nfs4_label,
5907};
5908#endif
5909
5910
533eb461
AA		 5911/*
5912 * nfs_fhget will use either the mounted_on_fileid or the fileid
5913 */
69aaaae1
TM		 5914static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5915{
533eb461
AA		 5916 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5917 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5918 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5919 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5920 return;
5921
5922 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5923 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5924 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5925 fattr->nlink = 2;
5926}
5927
f05d147f
BS		 5928static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5929 const struct qstr *name,
5930 struct nfs4_fs_locations *fs_locations,
5931 struct page *page)
683b57b4
TM		 5932{
5933 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5934 u32 bitmask[3] = {
361e624f 5935 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5936 };
5937 struct nfs4_fs_locations_arg args = {
5938 .dir_fh = NFS_FH(dir),
c228fd3a 5939 .name = name,
683b57b4
TM		 5940 .page = page,
5941 .bitmask = bitmask,
5942 };
22958463
BH		 5943 struct nfs4_fs_locations_res res = {
5944 .fs_locations = fs_locations,
5945 };
683b57b4
TM		 5946 struct rpc_message msg = {
5947 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5948 .rpc_argp = &args,
22958463 5949 .rpc_resp = &res,
683b57b4
TM		 5950 };
5951 int status;
5952
3110ff80 5953 dprintk("%s: start\n", __func__);
533eb461
AA		 5954
5955 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5956 * is not supported */
5957 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5958 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5959 else
5960 bitmask[0] |= FATTR4_WORD0_FILEID;
5961
c228fd3a 5962 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5963 fs_locations->server = server;
830b8e33 5964 fs_locations->nlocations = 0;
f05d147f 5965 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5966 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5967 return status;
5968}
5969
f05d147f
BS		 5970int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5971 const struct qstr *name,
5972 struct nfs4_fs_locations *fs_locations,
5973 struct page *page)
db0a9593
BS		 5974{
5975 struct nfs4_exception exception = { };
5976 int err;
5977 do {
078ea3df
TM		 5978 err = _nfs4_proc_fs_locations(client, dir, name,
5979 fs_locations, page);
5980 trace_nfs4_get_fs_locations(dir, name, err);
5981 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5982 &exception);
5983 } while (exception.retry);
5984 return err;
5985}
5986
b03d735b
CL		 5987/*
5988 * This operation also signals the server that this client is
5989 * performing migration recovery. The server can stop returning
5990 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
5991 * appended to this compound to identify the client ID which is
5992 * performing recovery.
5993 */
5994static int _nfs40_proc_get_locations(struct inode *inode,
5995 struct nfs4_fs_locations *locations,
5996 struct page *page, struct rpc_cred *cred)
5997{
5998 struct nfs_server *server = NFS_SERVER(inode);
5999 struct rpc_clnt *clnt = server->client;
6000 u32 bitmask[2] = {
6001 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6002 };
6003 struct nfs4_fs_locations_arg args = {
6004 .clientid = server->nfs_client->cl_clientid,
6005 .fh = NFS_FH(inode),
6006 .page = page,
6007 .bitmask = bitmask,
6008 .migration = 1, /* skip LOOKUP */
6009 .renew = 1, /* append RENEW */
6010 };
6011 struct nfs4_fs_locations_res res = {
6012 .fs_locations = locations,
6013 .migration = 1,
6014 .renew = 1,
6015 };
6016 struct rpc_message msg = {
6017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6018 .rpc_argp = &args,
6019 .rpc_resp = &res,
6020 .rpc_cred = cred,
6021 };
6022 unsigned long now = jiffies;
6023 int status;
6024
6025 nfs_fattr_init(&locations->fattr);
6026 locations->server = server;
6027 locations->nlocations = 0;
6028
6029 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6030 nfs4_set_sequence_privileged(&args.seq_args);
6031 status = nfs4_call_sync_sequence(clnt, server, &msg,
6032 &args.seq_args, &res.seq_res);
6033 if (status)
6034 return status;
6035
6036 renew_lease(server, now);
6037 return 0;
6038}
6039
6040#ifdef CONFIG_NFS_V4_1
6041
6042/*
6043 * This operation also signals the server that this client is
6044 * performing migration recovery. The server can stop asserting
6045 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6046 * performing this operation is identified in the SEQUENCE
6047 * operation in this compound.
6048 *
6049 * When the client supports GETATTR(fs_locations_info), it can
6050 * be plumbed in here.
6051 */
6052static int _nfs41_proc_get_locations(struct inode *inode,
6053 struct nfs4_fs_locations *locations,
6054 struct page *page, struct rpc_cred *cred)
6055{
6056 struct nfs_server *server = NFS_SERVER(inode);
6057 struct rpc_clnt *clnt = server->client;
6058 u32 bitmask[2] = {
6059 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6060 };
6061 struct nfs4_fs_locations_arg args = {
6062 .fh = NFS_FH(inode),
6063 .page = page,
6064 .bitmask = bitmask,
6065 .migration = 1, /* skip LOOKUP */
6066 };
6067 struct nfs4_fs_locations_res res = {
6068 .fs_locations = locations,
6069 .migration = 1,
6070 };
6071 struct rpc_message msg = {
6072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6073 .rpc_argp = &args,
6074 .rpc_resp = &res,
6075 .rpc_cred = cred,
6076 };
6077 int status;
6078
6079 nfs_fattr_init(&locations->fattr);
6080 locations->server = server;
6081 locations->nlocations = 0;
6082
6083 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6084 nfs4_set_sequence_privileged(&args.seq_args);
6085 status = nfs4_call_sync_sequence(clnt, server, &msg,
6086 &args.seq_args, &res.seq_res);
6087 if (status == NFS4_OK &&
6088 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6089 status = -NFS4ERR_LEASE_MOVED;
6090 return status;
6091}
6092
6093#endif /* CONFIG_NFS_V4_1 */
6094
6095/**
6096 * nfs4_proc_get_locations - discover locations for a migrated FSID
6097 * @inode: inode on FSID that is migrating
6098 * @locations: result of query
6099 * @page: buffer
6100 * @cred: credential to use for this operation
6101 *
6102 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6103 * operation failed, or a negative errno if a local error occurred.
6104 *
6105 * On success, "locations" is filled in, but if the server has
6106 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6107 * asserted.
6108 *
6109 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6110 * from this client that require migration recovery.
6111 */
6112int nfs4_proc_get_locations(struct inode *inode,
6113 struct nfs4_fs_locations *locations,
6114 struct page *page, struct rpc_cred *cred)
6115{
6116 struct nfs_server *server = NFS_SERVER(inode);
6117 struct nfs_client *clp = server->nfs_client;
6118 const struct nfs4_mig_recovery_ops *ops =
6119 clp->cl_mvops->mig_recovery_ops;
6120 struct nfs4_exception exception = { };
6121 int status;
6122
6123 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6124 (unsigned long long)server->fsid.major,
6125 (unsigned long long)server->fsid.minor,
6126 clp->cl_hostname);
6127 nfs_display_fhandle(NFS_FH(inode), __func__);
6128
6129 do {
6130 status = ops->get_locations(inode, locations, page, cred);
6131 if (status != -NFS4ERR_DELAY)
6132 break;
6133 nfs4_handle_exception(server, status, &exception);
6134 } while (exception.retry);
6135 return status;
6136}
6137
5ec16a85 6138/**
a5250def
WAA		 6139 * If 'use_integrity' is true and the state managment nfs_client
6140 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6141 * and the machine credential as per RFC3530bis and RFC5661 Security
6142 * Considerations sections. Otherwise, just use the user cred with the
6143 * filesystem's rpc_client.
5ec16a85 6144 */
a5250def 6145static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6146{
6147 int status;
6148 struct nfs4_secinfo_arg args = {
6149 .dir_fh = NFS_FH(dir),
6150 .name = name,
6151 };
6152 struct nfs4_secinfo_res res = {
6153 .flavors = flavors,
6154 };
6155 struct rpc_message msg = {
6156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6157 .rpc_argp = &args,
6158 .rpc_resp = &res,
6159 };
a5250def 6160 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6161 struct rpc_cred *cred = NULL;
a5250def
WAA		 6162
6163 if (use_integrity) {
6164 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6165 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6166 msg.rpc_cred = cred;
a5250def 6167 }
5a5ea0d4
BS		 6168
6169 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6170
6171 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6172 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6173
a5250def
WAA		 6174 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6175 &res.seq_res, 0);
5a5ea0d4 6176 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6177
7cb852df
WAA		 6178 if (cred)
6179 put_rpccred(cred);
a5250def 6180
5a5ea0d4
BS		 6181 return status;
6182}
6183
72de53ec
BS		 6184int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6185 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6186{
6187 struct nfs4_exception exception = { };
6188 int err;
6189 do {
a5250def
WAA		 6190 err = -NFS4ERR_WRONGSEC;
6191
6192 /* try to use integrity protection with machine cred */
6193 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6194 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6195
6196 /*
6197 * if unable to use integrity protection, or SECINFO with
6198 * integrity protection returns NFS4ERR_WRONGSEC (which is
6199 * disallowed by spec, but exists in deployed servers) use
6200 * the current filesystem's rpc_client and the user cred.
6201 */
6202 if (err == -NFS4ERR_WRONGSEC)
6203 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6204
078ea3df
TM		 6205 trace_nfs4_secinfo(dir, name, err);
6206 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6207 &exception);
6208 } while (exception.retry);
6209 return err;
6210}
6211
557134a3 6212#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6213/*
6214 * Check the exchange flags returned by the server for invalid flags, having
6215 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6216 * DS flags set.
6217 */
6218static int nfs4_check_cl_exchange_flags(u32 flags)
6219{
6220 if (flags & ~EXCHGID4_FLAG_MASK_R)
6221 goto out_inval;
6222 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6223 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6224 goto out_inval;
6225 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6226 goto out_inval;
6227 return NFS_OK;
6228out_inval:
6229 return -NFS4ERR_INVAL;
6230}
6231
78fe0f41 6232static bool
79d4e1f0
CL		 6233nfs41_same_server_scope(struct nfs41_server_scope *a,
6234 struct nfs41_server_scope *b)
78fe0f41
WAA		 6235{
6236 if (a->server_scope_sz == b->server_scope_sz &&
6237 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6238 return true;
6239
6240 return false;
6241}
6242
7c44f1ae
WAA		 6243/*
6244 * nfs4_proc_bind_conn_to_session()
6245 *
6246 * The 4.1 client currently uses the same TCP connection for the
6247 * fore and backchannel.
6248 */
2cf047c9 6249int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6250{
6251 int status;
6252 struct nfs41_bind_conn_to_session_res res;
6253 struct rpc_message msg = {
6254 .rpc_proc =
6255 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6256 .rpc_argp = clp,
6257 .rpc_resp = &res,
2cf047c9 6258 .rpc_cred = cred,
7c44f1ae
WAA		 6259 };
6260
6261 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6262
6263 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6264 if (unlikely(res.session == NULL)) {
6265 status = -ENOMEM;
6266 goto out;
6267 }
6268
6269 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6270 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6271 if (status == 0) {
6272 if (memcmp(res.session->sess_id.data,
6273 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6274 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6275 status = -EIO;
6276 goto out_session;
6277 }
6278 if (res.dir != NFS4_CDFS4_BOTH) {
6279 dprintk("NFS: %s: Unexpected direction from server\n",
6280 __func__);
6281 status = -EIO;
6282 goto out_session;
6283 }
6284 if (res.use_conn_in_rdma_mode) {
6285 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6286 __func__);
6287 status = -EIO;
6288 goto out_session;
6289 }
6290 }
6291out_session:
6292 kfree(res.session);
6293out:
6294 dprintk("<-- %s status= %d\n", __func__, status);
6295 return status;
6296}
6297
99fe60d0 6298/*
fa940720
WAA		 6299 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6300 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6301 */
6302static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6303 .how = SP4_MACH_CRED,
6304 .enforce.u.words = {
6305 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6306 1 << (OP_EXCHANGE_ID - 32) |
6307 1 << (OP_CREATE_SESSION - 32) |
6308 1 << (OP_DESTROY_SESSION - 32) |
6309 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6310 },
6311 .allow.u.words = {
6312 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6313 1 << (OP_LOCKU) |
6314 1 << (OP_COMMIT),
8b5bee2e 6315 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6316 1 << (OP_SECINFO_NO_NAME - 32) |
6317 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6318 1 << (OP_FREE_STATEID - 32) |
6319 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6320 }
6321};
6322
6323/*
6324 * Select the state protection mode for client `clp' given the server results
6325 * from exchange_id in `sp'.
99fe60d0 6326 *
2031cd1a
WAA		 6327 * Returns 0 on success, negative errno otherwise.
6328 */
6329static int nfs4_sp4_select_mode(struct nfs_client *clp,
6330 struct nfs41_state_protection *sp)
6331{
6332 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6333 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6334 1 << (OP_EXCHANGE_ID - 32) |
6335 1 << (OP_CREATE_SESSION - 32) |
6336 1 << (OP_DESTROY_SESSION - 32) |
6337 1 << (OP_DESTROY_CLIENTID - 32)
6338 };
6339 unsigned int i;
6340
6341 if (sp->how == SP4_MACH_CRED) {
6342 /* Print state protect result */
6343 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6344 for (i = 0; i <= LAST_NFS4_OP; i++) {
6345 if (test_bit(i, sp->enforce.u.longs))
6346 dfprintk(MOUNT, " enforce op %d\n", i);
6347 if (test_bit(i, sp->allow.u.longs))
6348 dfprintk(MOUNT, " allow op %d\n", i);
6349 }
6350
6351 /* make sure nothing is on enforce list that isn't supported */
6352 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6353 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6354 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6355 return -EINVAL;
6356 }
6357 }
6358
6359 /*
6360 * Minimal mode - state operations are allowed to use machine
6361 * credential. Note this already happens by default, so the
6362 * client doesn't have to do anything more than the negotiation.
6363 *
6364 * NOTE: we don't care if EXCHANGE_ID is in the list -
6365 * we're already using the machine cred for exchange_id
6366 * and will never use a different cred.
6367 */
6368 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6369 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6370 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6371 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6372 dfprintk(MOUNT, "sp4_mach_cred:\n");
6373 dfprintk(MOUNT, " minimal mode enabled\n");
6374 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6375 } else {
6376 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6377 return -EINVAL;
6378 }
fa940720
WAA		 6379
6380 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6381 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6382 dfprintk(MOUNT, " cleanup mode enabled\n");
6383 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6384 }
8b5bee2e
WAA		 6385
6386 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6387 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6388 dfprintk(MOUNT, " secinfo mode enabled\n");
6389 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6390 }
3787d506
WAA		 6391
6392 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6393 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6394 dfprintk(MOUNT, " stateid mode enabled\n");
6395 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6396 }
8c21c62c
WAA		 6397
6398 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6399 dfprintk(MOUNT, " write mode enabled\n");
6400 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6401 }
6402
6403 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6404 dfprintk(MOUNT, " commit mode enabled\n");
6405 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6406 }
2031cd1a
WAA		 6407 }
6408
6409 return 0;
6410}
6411
6412/*
6413 * _nfs4_proc_exchange_id()
6bbb4ae8 6414 *
2031cd1a 6415 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6416 */
2031cd1a
WAA		 6417static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6418 u32 sp4_how)
99fe60d0
BH		 6419{
6420 nfs4_verifier verifier;
6421 struct nfs41_exchange_id_args args = {
cd93710e 6422 .verifier = &verifier,
99fe60d0 6423 .client = clp,
4f0b429d
TM		 6424 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6425 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6426 };
6427 struct nfs41_exchange_id_res res = {
32b01310 6428 0
99fe60d0
BH		 6429 };
6430 int status;
6431 struct rpc_message msg = {
6432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6433 .rpc_argp = &args,
6434 .rpc_resp = &res,
6435 .rpc_cred = cred,
6436 };
99fe60d0 6437
f092075d 6438 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6439 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6440 sizeof(args.id));
6bbb4ae8
CL		 6441 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6442 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6443 args.id_len, args.id);
99fe60d0 6444
acdeb69d 6445 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6446 GFP_NOFS);
acdeb69d 6447 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6448 status = -ENOMEM;
6449 goto out;
6450 }
78fe0f41 6451
79d4e1f0 6452 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6453 GFP_NOFS);
177313f1 6454 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6455 status = -ENOMEM;
acdeb69d 6456 goto out_server_owner;
abe9a6d5 6457 }
78fe0f41 6458
bbafffd2 6459 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6460 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6461 status = -ENOMEM;
6462 goto out_server_scope;
6463 }
6464
2031cd1a
WAA		 6465 switch (sp4_how) {
6466 case SP4_NONE:
6467 args.state_protect.how = SP4_NONE;
6468 break;
6469
6470 case SP4_MACH_CRED:
6471 args.state_protect = nfs4_sp4_mach_cred_request;
6472 break;
6473
6474 default:
6475 /* unsupported! */
6476 WARN_ON_ONCE(1);
6477 status = -EINVAL;
6478 goto out_server_scope;
6479 }
6480
1bd714f2 6481 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6482 trace_nfs4_exchange_id(clp, status);
177313f1 6483 if (status == 0)
32b01310 6484 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6485
2031cd1a
WAA		 6486 if (status == 0)
6487 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6488
acdeb69d 6489 if (status == 0) {
32b01310
TM		 6490 clp->cl_clientid = res.clientid;
6491 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6492 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6493 clp->cl_seqid = res.seqid;
6494
acdeb69d
CL		 6495 kfree(clp->cl_serverowner);
6496 clp->cl_serverowner = res.server_owner;
6497 res.server_owner = NULL;
78fe0f41 6498
7d2ed9ac 6499 /* use the most recent implementation id */
59155546
CL		 6500 kfree(clp->cl_implid);
6501 clp->cl_implid = res.impl_id;
7d2ed9ac 6502
177313f1 6503 if (clp->cl_serverscope != NULL &&
79d4e1f0 6504 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6505 res.server_scope)) {
6506 dprintk("%s: server_scope mismatch detected\n",
6507 __func__);
6508 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6509 kfree(clp->cl_serverscope);
6510 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6511 }
6512
177313f1 6513 if (clp->cl_serverscope == NULL) {
79d4e1f0 6514 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6515 goto out;
6516 }
32b01310
TM		 6517 } else
6518 kfree(res.impl_id);
7d2ed9ac 6519
acdeb69d
CL		 6520out_server_owner:
6521 kfree(res.server_owner);
7d2ed9ac 6522out_server_scope:
abe9a6d5
WAA		 6523 kfree(res.server_scope);
6524out:
177313f1 6525 if (clp->cl_implid != NULL)
6bbb4ae8 6526 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6527 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6528 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6529 clp->cl_implid->date.seconds,
6530 clp->cl_implid->date.nseconds);
6bbb4ae8 6531 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6532 return status;
6533}
6534
2031cd1a
WAA		 6535/*
6536 * nfs4_proc_exchange_id()
6537 *
6538 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6539 *
6540 * Since the clientid has expired, all compounds using sessions
6541 * associated with the stale clientid will be returning
6542 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6543 * be in some phase of session reset.
6544 *
6545 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6546 */
6547int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6548{
6549 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6550 int status;
6551
6552 /* try SP4_MACH_CRED if krb5i/p */
6553 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6554 authflavor == RPC_AUTH_GSS_KRB5P) {
6555 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6556 if (!status)
6557 return 0;
6558 }
6559
6560 /* try SP4_NONE */
6561 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6562}
6563
66245539
TM		 6564static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6565 struct rpc_cred *cred)
6566{
6567 struct rpc_message msg = {
6568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6569 .rpc_argp = clp,
6570 .rpc_cred = cred,
6571 };
6572 int status;
6573
6574 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6575 trace_nfs4_destroy_clientid(clp, status);
66245539 6576 if (status)
02c67525 6577 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6578 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6579 return status;
6580}
6581
6582static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6583 struct rpc_cred *cred)
6584{
6585 unsigned int loop;
6586 int ret;
6587
6588 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6589 ret = _nfs4_proc_destroy_clientid(clp, cred);
6590 switch (ret) {
6591 case -NFS4ERR_DELAY:
6592 case -NFS4ERR_CLIENTID_BUSY:
6593 ssleep(1);
6594 break;
6595 default:
6596 return ret;
6597 }
6598 }
6599 return 0;
6600}
6601
6602int nfs4_destroy_clientid(struct nfs_client *clp)
6603{
6604 struct rpc_cred *cred;
6605 int ret = 0;
6606
6607 if (clp->cl_mvops->minor_version < 1)
6608 goto out;
6609 if (clp->cl_exchange_flags == 0)
6610 goto out;
05f4c350
CL		 6611 if (clp->cl_preserve_clid)
6612 goto out;
73d8bde5 6613 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6614 ret = nfs4_proc_destroy_clientid(clp, cred);
6615 if (cred)
6616 put_rpccred(cred);
6617 switch (ret) {
6618 case 0:
6619 case -NFS4ERR_STALE_CLIENTID:
6620 clp->cl_exchange_flags = 0;
6621 }
6622out:
6623 return ret;
6624}
6625
2050f0cc
AA		 6626struct nfs4_get_lease_time_data {
6627 struct nfs4_get_lease_time_args *args;
6628 struct nfs4_get_lease_time_res *res;
6629 struct nfs_client *clp;
6630};
6631
6632static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6633 void *calldata)
6634{
2050f0cc
AA		 6635 struct nfs4_get_lease_time_data *data =
6636 (struct nfs4_get_lease_time_data *)calldata;
6637
6638 dprintk("--> %s\n", __func__);
6639 /* just setup sequence, do not trigger session recovery
6640 since we're invoked within one */
d9afbd1b
TM		 6641 nfs41_setup_sequence(data->clp->cl_session,
6642 &data->args->la_seq_args,
6643 &data->res->lr_seq_res,
6644 task);
2050f0cc
AA		 6645 dprintk("<-- %s\n", __func__);
6646}
6647
6648/*
6649 * Called from nfs4_state_manager thread for session setup, so don't recover
6650 * from sequence operation or clientid errors.
6651 */
6652static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6653{
6654 struct nfs4_get_lease_time_data *data =
6655 (struct nfs4_get_lease_time_data *)calldata;
6656
6657 dprintk("--> %s\n", __func__);
14516c3a
TM		 6658 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6659 return;
2050f0cc
AA		 6660 switch (task->tk_status) {
6661 case -NFS4ERR_DELAY:
6662 case -NFS4ERR_GRACE:
6663 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6664 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6665 task->tk_status = 0;
a8a4ae3a
AA		 6666 /* fall through */
6667 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6668 rpc_restart_call_prepare(task);
2050f0cc
AA		 6669 return;
6670 }
2050f0cc
AA		 6671 dprintk("<-- %s\n", __func__);
6672}
6673
17280175 6674static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6675 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6676 .rpc_call_done = nfs4_get_lease_time_done,
6677};
6678
6679int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6680{
6681 struct rpc_task *task;
6682 struct nfs4_get_lease_time_args args;
6683 struct nfs4_get_lease_time_res res = {
6684 .lr_fsinfo = fsinfo,
6685 };
6686 struct nfs4_get_lease_time_data data = {
6687 .args = &args,
6688 .res = &res,
6689 .clp = clp,
6690 };
6691 struct rpc_message msg = {
6692 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6693 .rpc_argp = &args,
6694 .rpc_resp = &res,
6695 };
6696 struct rpc_task_setup task_setup = {
6697 .rpc_client = clp->cl_rpcclient,
6698 .rpc_message = &msg,
6699 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6700 .callback_data = &data,
6701 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6702 };
6703 int status;
6704
a9c92d6b 6705 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6706 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6707 dprintk("--> %s\n", __func__);
6708 task = rpc_run_task(&task_setup);
6709
6710 if (IS_ERR(task))
6711 status = PTR_ERR(task);
6712 else {
6713 status = task->tk_status;
6714 rpc_put_task(task);
6715 }
6716 dprintk("<-- %s return %d\n", __func__, status);
6717
6718 return status;
6719}
6720
fc931582
AA		 6721/*
6722 * Initialize the values to be used by the client in CREATE_SESSION
6723 * If nfs4_init_session set the fore channel request and response sizes,
6724 * use them.
6725 *
6726 * Set the back channel max_resp_sz_cached to zero to force the client to
6727 * always set csa_cachethis to FALSE because the current implementation
6728 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6729 */
6730static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6731{
18aad3d5
AA		 6732 unsigned int max_rqst_sz, max_resp_sz;
6733
6734 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6735 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6736
fc931582 6737 /* Fore channel attributes */
18aad3d5
AA		 6738 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6739 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6740 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6741 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6742
6743 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6744 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6745 __func__,
6746 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6747 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6748
6749 /* Back channel attributes */
fc931582
AA		 6750 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6751 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6752 args->bc_attrs.max_resp_sz_cached = 0;
6753 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6754 args->bc_attrs.max_reqs = 1;
6755
6756 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6757 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6758 __func__,
6759 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6760 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6761 args->bc_attrs.max_reqs);
6762}
6763
43c2e885 6764static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6765{
43c2e885
BF		 6766 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6767 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6768
43c2e885
BF		 6769 if (rcvd->max_resp_sz > sent->max_resp_sz)
6770 return -EINVAL;
6771 /*
6772 * Our requested max_ops is the minimum we need; we're not
6773 * prepared to break up compounds into smaller pieces than that.
6774 * So, no point even trying to continue if the server won't
6775 * cooperate:
6776 */
6777 if (rcvd->max_ops < sent->max_ops)
6778 return -EINVAL;
6779 if (rcvd->max_reqs == 0)
6780 return -EINVAL;
b4b9a0c1
VG		 6781 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6782 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6783 return 0;
8d35301d
AA		 6784}
6785
43c2e885
BF		 6786static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6787{
6788 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6789 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6790
43c2e885
BF		 6791 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6792 return -EINVAL;
6793 if (rcvd->max_resp_sz < sent->max_resp_sz)
6794 return -EINVAL;
6795 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6796 return -EINVAL;
6797 /* These would render the backchannel useless: */
b4b9a0c1 6798 if (rcvd->max_ops != sent->max_ops)
43c2e885 6799 return -EINVAL;
b4b9a0c1 6800 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6801 return -EINVAL;
6802 return 0;
6803}
8d35301d 6804
8d35301d
AA		 6805static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6806 struct nfs4_session *session)
6807{
43c2e885 6808 int ret;
8d35301d 6809
43c2e885
BF		 6810 ret = nfs4_verify_fore_channel_attrs(args, session);
6811 if (ret)
6812 return ret;
6813 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6814}
6815
848f5bda
TM		 6816static int _nfs4_proc_create_session(struct nfs_client *clp,
6817 struct rpc_cred *cred)
fc931582
AA		 6818{
6819 struct nfs4_session *session = clp->cl_session;
6820 struct nfs41_create_session_args args = {
6821 .client = clp,
6822 .cb_program = NFS4_CALLBACK,
6823 };
6824 struct nfs41_create_session_res res = {
6825 .client = clp,
6826 };
6827 struct rpc_message msg = {
6828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6829 .rpc_argp = &args,
6830 .rpc_resp = &res,
848f5bda 6831 .rpc_cred = cred,
fc931582
AA		 6832 };
6833 int status;
6834
6835 nfs4_init_channel_attrs(&args);
0f91421e 6836 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6837
1bd714f2 6838 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6839 trace_nfs4_create_session(clp, status);
fc931582 6840
43095d39 6841 if (!status) {
8d35301d
AA		 6842 /* Verify the session's negotiated channel_attrs values */
6843 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6844 /* Increment the clientid slot sequence id */
6845 clp->cl_seqid++;
6846 }
6847
6848 return status;
6849}
6850
6851/*
6852 * Issues a CREATE_SESSION operation to the server.
6853 * It is the responsibility of the caller to verify the session is
6854 * expired before calling this routine.
6855 */
848f5bda 6856int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6857{
6858 int status;
6859 unsigned *ptr;
fc931582
AA		 6860 struct nfs4_session *session = clp->cl_session;
6861
6862 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6863
848f5bda 6864 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6865 if (status)
6866 goto out;
6867
aacd5537
AA		 6868 /* Init or reset the session slot tables */
6869 status = nfs4_setup_session_slot_tables(session);
6870 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6871 if (status)
6872 goto out;
6873
6874 ptr = (unsigned *)&session->sess_id.data[0];
6875 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6876 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6877out:
6878 dprintk("<-- %s\n", __func__);
6879 return status;
6880}
6881
0f3e66c6
AA		 6882/*
6883 * Issue the over-the-wire RPC DESTROY_SESSION.
6884 * The caller must serialize access to this routine.
6885 */
848f5bda
TM		 6886int nfs4_proc_destroy_session(struct nfs4_session *session,
6887 struct rpc_cred *cred)
0f3e66c6 6888{
848f5bda
TM		 6889 struct rpc_message msg = {
6890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6891 .rpc_argp = session,
6892 .rpc_cred = cred,
6893 };
0f3e66c6 6894 int status = 0;
0f3e66c6
AA		 6895
6896 dprintk("--> nfs4_proc_destroy_session\n");
6897
6898 /* session is still being setup */
6899 if (session->clp->cl_cons_state != NFS_CS_READY)
6900 return status;
6901
1bd714f2 6902 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6903 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6904
6905 if (status)
08106ac7 6906 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6907 "Session has been destroyed regardless...\n", status);
6908
6909 dprintk("<-- nfs4_proc_destroy_session\n");
6910 return status;
6911}
6912
fc01cea9
AA		 6913/*
6914 * Renew the cl_session lease.
6915 */
d5f8d3fe
TM		 6916struct nfs4_sequence_data {
6917 struct nfs_client *clp;
6918 struct nfs4_sequence_args args;
6919 struct nfs4_sequence_res res;
6920};
6921
dc96aef9
AB		 6922static void nfs41_sequence_release(void *data)
6923{
d5f8d3fe
TM		 6924 struct nfs4_sequence_data *calldata = data;
6925 struct nfs_client *clp = calldata->clp;
dc96aef9 6926
7135840f
AB		 6927 if (atomic_read(&clp->cl_count) > 1)
6928 nfs4_schedule_state_renewal(clp);
6929 nfs_put_client(clp);
d5f8d3fe 6930 kfree(calldata);
dc96aef9
AB		 6931}
6932
aa5190d0
TM		 6933static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6934{
6935 switch(task->tk_status) {
6936 case -NFS4ERR_DELAY:
aa5190d0
TM		 6937 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6938 return -EAGAIN;
6939 default:
0400a6b0 6940 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6941 }
6942 return 0;
6943}
6944
dc96aef9 6945static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6946{
d5f8d3fe
TM		 6947 struct nfs4_sequence_data *calldata = data;
6948 struct nfs_client *clp = calldata->clp;
fc01cea9 6949
14516c3a
TM		 6950 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6951 return;
fc01cea9 6952
c6d01c6f 6953 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6954 if (task->tk_status < 0) {
6955 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6956 if (atomic_read(&clp->cl_count) == 1)
6957 goto out;
fc01cea9 6958
aa5190d0
TM		 6959 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6960 rpc_restart_call_prepare(task);
fc01cea9
AA		 6961 return;
6962 }
6963 }
fc01cea9 6964 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6965out:
fc01cea9
AA		 6966 dprintk("<-- %s\n", __func__);
6967}
6968
6969static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6970{
d5f8d3fe
TM		 6971 struct nfs4_sequence_data *calldata = data;
6972 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6973 struct nfs4_sequence_args *args;
6974 struct nfs4_sequence_res *res;
6975
fc01cea9
AA		 6976 args = task->tk_msg.rpc_argp;
6977 res = task->tk_msg.rpc_resp;
6978
d9afbd1b 6979 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6980}
6981
6982static const struct rpc_call_ops nfs41_sequence_ops = {
6983 .rpc_call_done = nfs41_sequence_call_done,
6984 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6985 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6986};
6987
8fe72bac
TM		 6988static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6989 struct rpc_cred *cred,
6990 bool is_privileged)
fc01cea9 6991{
d5f8d3fe 6992 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6993 struct rpc_message msg = {
6994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6995 .rpc_cred = cred,
6996 };
71ac6da9
TM		 6997 struct rpc_task_setup task_setup_data = {
6998 .rpc_client = clp->cl_rpcclient,
6999 .rpc_message = &msg,
8fe72bac 7000 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7001 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7002 };
fc01cea9 7003
7135840f 7004 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7005 return ERR_PTR(-EIO);
dfb4f309 7006 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7007 if (calldata == NULL) {
7135840f 7008 nfs_put_client(clp);
71ac6da9 7009 return ERR_PTR(-ENOMEM);
fc01cea9 7010 }
a9c92d6b 7011 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7012 if (is_privileged)
7013 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7014 msg.rpc_argp = &calldata->args;
7015 msg.rpc_resp = &calldata->res;
7016 calldata->clp = clp;
71ac6da9 7017 task_setup_data.callback_data = calldata;
fc01cea9 7018
71ac6da9
TM		 7019 return rpc_run_task(&task_setup_data);
7020}
7021
2f60ea6b 7022static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7023{
7024 struct rpc_task *task;
7025 int ret = 0;
7026
2f60ea6b
TM		 7027 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7028 return 0;
8fe72bac 7029 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7030 if (IS_ERR(task))
7031 ret = PTR_ERR(task);
7032 else
bf294b41 7033 rpc_put_task_async(task);
71ac6da9
TM		 7034 dprintk("<-- %s status=%d\n", __func__, ret);
7035 return ret;
7036}
7037
7038static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7039{
7040 struct rpc_task *task;
7041 int ret;
7042
8fe72bac 7043 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7044 if (IS_ERR(task)) {
7045 ret = PTR_ERR(task);
7046 goto out;
7047 }
7048 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7049 if (!ret) {
7050 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7051
7052 if (task->tk_status == 0)
7053 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7054 ret = task->tk_status;
b4410c2f 7055 }
71ac6da9
TM		 7056 rpc_put_task(task);
7057out:
7058 dprintk("<-- %s status=%d\n", __func__, ret);
7059 return ret;
fc01cea9
AA		 7060}
7061
fce5c838
RL		 7062struct nfs4_reclaim_complete_data {
7063 struct nfs_client *clp;
7064 struct nfs41_reclaim_complete_args arg;
7065 struct nfs41_reclaim_complete_res res;
7066};
7067
7068static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7069{
7070 struct nfs4_reclaim_complete_data *calldata = data;
7071
d9afbd1b
TM		 7072 nfs41_setup_sequence(calldata->clp->cl_session,
7073 &calldata->arg.seq_args,
7074 &calldata->res.seq_res,
7075 task);
fce5c838
RL		 7076}
7077
aa5190d0
TM		 7078static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7079{
7080 switch(task->tk_status) {
7081 case 0:
7082 case -NFS4ERR_COMPLETE_ALREADY:
7083 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7084 break;
7085 case -NFS4ERR_DELAY:
aa5190d0 7086 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7087 /* fall through */
7088 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7089 return -EAGAIN;
7090 default:
0400a6b0 7091 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7092 }
7093 return 0;
7094}
7095
fce5c838
RL		 7096static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7097{
7098 struct nfs4_reclaim_complete_data *calldata = data;
7099 struct nfs_client *clp = calldata->clp;
7100 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7101
7102 dprintk("--> %s\n", __func__);
14516c3a
TM		 7103 if (!nfs41_sequence_done(task, res))
7104 return;
fce5c838 7105
c6d01c6f 7106 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7107 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7108 rpc_restart_call_prepare(task);
7109 return;
7110 }
fce5c838
RL		 7111 dprintk("<-- %s\n", __func__);
7112}
7113
7114static void nfs4_free_reclaim_complete_data(void *data)
7115{
7116 struct nfs4_reclaim_complete_data *calldata = data;
7117
7118 kfree(calldata);
7119}
7120
7121static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7122 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7123 .rpc_call_done = nfs4_reclaim_complete_done,
7124 .rpc_release = nfs4_free_reclaim_complete_data,
7125};
7126
7127/*
7128 * Issue a global reclaim complete.
7129 */
965e9c23
TM		 7130static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7131 struct rpc_cred *cred)
fce5c838
RL		 7132{
7133 struct nfs4_reclaim_complete_data *calldata;
7134 struct rpc_task *task;
7135 struct rpc_message msg = {
7136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7137 .rpc_cred = cred,
fce5c838
RL		 7138 };
7139 struct rpc_task_setup task_setup_data = {
7140 .rpc_client = clp->cl_rpcclient,
7141 .rpc_message = &msg,
7142 .callback_ops = &nfs4_reclaim_complete_call_ops,
7143 .flags = RPC_TASK_ASYNC,
7144 };
7145 int status = -ENOMEM;
7146
7147 dprintk("--> %s\n", __func__);
8535b2be 7148 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7149 if (calldata == NULL)
7150 goto out;
7151 calldata->clp = clp;
7152 calldata->arg.one_fs = 0;
fce5c838 7153
a9c92d6b 7154 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7155 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7156 msg.rpc_argp = &calldata->arg;
7157 msg.rpc_resp = &calldata->res;
7158 task_setup_data.callback_data = calldata;
7159 task = rpc_run_task(&task_setup_data);
acf82b85 7160 if (IS_ERR(task)) {
fce5c838 7161 status = PTR_ERR(task);
acf82b85
DC		 7162 goto out;
7163 }
c34c32ea
AA		 7164 status = nfs4_wait_for_completion_rpc_task(task);
7165 if (status == 0)
7166 status = task->tk_status;
fce5c838 7167 rpc_put_task(task);
acf82b85 7168 return 0;
fce5c838
RL		 7169out:
7170 dprintk("<-- %s status=%d\n", __func__, status);
7171 return status;
7172}
b1f69b75
AA		 7173
7174static void
7175nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7176{
7177 struct nfs4_layoutget *lgp = calldata;
c31663d4 7178 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7179 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7180
7181 dprintk("--> %s\n", __func__);
c31663d4
FI		 7182 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7183 * right now covering the LAYOUTGET we are about to send.
7184 * However, that is not so catastrophic, and there seems
7185 * to be no way to prevent it completely.
7186 */
6ba7db34 7187 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7188 &lgp->res.seq_res, task))
b1f69b75 7189 return;
cf7d63f1
FI		 7190 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7191 NFS_I(lgp->args.inode)->layout,
7192 lgp->args.ctx->state)) {
7193 rpc_exit(task, NFS4_OK);
cf7d63f1 7194 }
b1f69b75
AA		 7195}
7196
7197static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7198{
7199 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7200 struct inode *inode = lgp->args.inode;
7201 struct nfs_server *server = NFS_SERVER(inode);
7202 struct pnfs_layout_hdr *lo;
7203 struct nfs4_state *state = NULL;
30005121 7204 unsigned long timeo, giveup;
b1f69b75
AA		 7205
7206 dprintk("--> %s\n", __func__);
7207
6ba7db34 7208 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7209 goto out;
b1f69b75
AA		 7210
7211 switch (task->tk_status) {
7212 case 0:
ee314c2a 7213 goto out;
b1f69b75
AA		 7214 case -NFS4ERR_LAYOUTTRYLATER:
7215 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7216 timeo = rpc_get_timeout(task->tk_client);
7217 giveup = lgp->args.timestamp + timeo;
7218 if (time_after(giveup, jiffies))
7219 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7220 break;
7221 case -NFS4ERR_EXPIRED:
7222 case -NFS4ERR_BAD_STATEID:
7223 spin_lock(&inode->i_lock);
7224 lo = NFS_I(inode)->layout;
7225 if (!lo || list_empty(&lo->plh_segs)) {
7226 spin_unlock(&inode->i_lock);
7227 /* If the open stateid was bad, then recover it. */
7228 state = lgp->args.ctx->state;
7229 } else {
7230 LIST_HEAD(head);
7231
7232 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7233 spin_unlock(&inode->i_lock);
7234 /* Mark the bad layout state as invalid, then
7235 * retry using the open stateid. */
7236 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7237 }
7238 }
ee314c2a
TM		 7239 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7240 rpc_restart_call_prepare(task);
7241out:
b1f69b75
AA		 7242 dprintk("<-- %s\n", __func__);
7243}
7244
8554116e
IK		 7245static size_t max_response_pages(struct nfs_server *server)
7246{
7247 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7248 return nfs_page_array_len(0, max_resp_sz);
7249}
7250
7251static void nfs4_free_pages(struct page **pages, size_t size)
7252{
7253 int i;
7254
7255 if (!pages)
7256 return;
7257
7258 for (i = 0; i < size; i++) {
7259 if (!pages[i])
7260 break;
7261 __free_page(pages[i]);
7262 }
7263 kfree(pages);
7264}
7265
7266static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7267{
7268 struct page **pages;
7269 int i;
7270
7271 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7272 if (!pages) {
7273 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7274 return NULL;
7275 }
7276
7277 for (i = 0; i < size; i++) {
7278 pages[i] = alloc_page(gfp_flags);
7279 if (!pages[i]) {
7280 dprintk("%s: failed to allocate page\n", __func__);
7281 nfs4_free_pages(pages, size);
7282 return NULL;
7283 }
7284 }
7285
7286 return pages;
7287}
7288
b1f69b75
AA		 7289static void nfs4_layoutget_release(void *calldata)
7290{
7291 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7292 struct inode *inode = lgp->args.inode;
7293 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7294 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7295
7296 dprintk("--> %s\n", __func__);
8554116e 7297 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7298 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7299 put_nfs_open_context(lgp->args.ctx);
7300 kfree(calldata);
7301 dprintk("<-- %s\n", __func__);
7302}
7303
7304static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7305 .rpc_call_prepare = nfs4_layoutget_prepare,
7306 .rpc_call_done = nfs4_layoutget_done,
7307 .rpc_release = nfs4_layoutget_release,
7308};
7309
a0b0a6e3
TM		 7310struct pnfs_layout_segment *
7311nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7312{
a47970ff
WAA		 7313 struct inode *inode = lgp->args.inode;
7314 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7315 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7316 struct rpc_task *task;
7317 struct rpc_message msg = {
7318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7319 .rpc_argp = &lgp->args,
7320 .rpc_resp = &lgp->res,
6ab59344 7321 .rpc_cred = lgp->cred,
b1f69b75
AA		 7322 };
7323 struct rpc_task_setup task_setup_data = {
7324 .rpc_client = server->client,
7325 .rpc_message = &msg,
7326 .callback_ops = &nfs4_layoutget_call_ops,
7327 .callback_data = lgp,
7328 .flags = RPC_TASK_ASYNC,
7329 };
a0b0a6e3 7330 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7331 int status = 0;
7332
7333 dprintk("--> %s\n", __func__);
7334
8554116e
IK		 7335 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7336 if (!lgp->args.layout.pages) {
7337 nfs4_layoutget_release(lgp);
a0b0a6e3 7338 return ERR_PTR(-ENOMEM);
8554116e
IK		 7339 }
7340 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7341 lgp->args.timestamp = jiffies;
8554116e 7342
35124a09 7343 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7344 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7345 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7346
7347 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7348 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7349
b1f69b75
AA		 7350 task = rpc_run_task(&task_setup_data);
7351 if (IS_ERR(task))
a0b0a6e3 7352 return ERR_CAST(task);
b1f69b75 7353 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7354 if (status == 0)
7355 status = task->tk_status;
1037e6ea
TM		 7356 trace_nfs4_layoutget(lgp->args.ctx,
7357 &lgp->args.range,
7358 &lgp->res.range,
7359 status);
085b7a45
WAA		 7360 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7361 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7362 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7363 rpc_put_task(task);
7364 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7365 if (status)
7366 return ERR_PTR(status);
7367 return lseg;
b1f69b75
AA		 7368}
7369
cbe82603
BH		 7370static void
7371nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7372{
7373 struct nfs4_layoutreturn *lrp = calldata;
7374
7375 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7376 nfs41_setup_sequence(lrp->clp->cl_session,
7377 &lrp->args.seq_args,
7378 &lrp->res.seq_res,
7379 task);
cbe82603
BH		 7380}
7381
7382static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7383{
7384 struct nfs4_layoutreturn *lrp = calldata;
7385 struct nfs_server *server;
7386
7387 dprintk("--> %s\n", __func__);
7388
6ba7db34 7389 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7390 return;
7391
7392 server = NFS_SERVER(lrp->args.inode);
7393 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7394 rpc_restart_call_prepare(task);
cbe82603
BH		 7395 return;
7396 }
cbe82603
BH		 7397 dprintk("<-- %s\n", __func__);
7398}
7399
7400static void nfs4_layoutreturn_release(void *calldata)
7401{
7402 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7403 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7404
7405 dprintk("--> %s\n", __func__);
849b286f
TM		 7406 spin_lock(&lo->plh_inode->i_lock);
7407 if (lrp->res.lrs_present)
7408 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7409 lo->plh_block_lgets--;
7410 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7411 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7412 kfree(calldata);
7413 dprintk("<-- %s\n", __func__);
7414}
7415
7416static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7417 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7418 .rpc_call_done = nfs4_layoutreturn_done,
7419 .rpc_release = nfs4_layoutreturn_release,
7420};
7421
7422int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7423{
7424 struct rpc_task *task;
7425 struct rpc_message msg = {
7426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7427 .rpc_argp = &lrp->args,
7428 .rpc_resp = &lrp->res,
9556000d 7429 .rpc_cred = lrp->cred,
cbe82603
BH		 7430 };
7431 struct rpc_task_setup task_setup_data = {
1771c577 7432 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7433 .rpc_message = &msg,
7434 .callback_ops = &nfs4_layoutreturn_call_ops,
7435 .callback_data = lrp,
7436 };
7437 int status;
7438
7439 dprintk("--> %s\n", __func__);
a9c92d6b 7440 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7441 task = rpc_run_task(&task_setup_data);
7442 if (IS_ERR(task))
7443 return PTR_ERR(task);
7444 status = task->tk_status;
1037e6ea 7445 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7446 dprintk("<-- %s status=%d\n", __func__, status);
7447 rpc_put_task(task);
7448 return status;
7449}
7450
7f11d8d3
AA		 7451/*
7452 * Retrieve the list of Data Server devices from the MDS.
7453 */
7454static int _nfs4_getdevicelist(struct nfs_server *server,
7455 const struct nfs_fh *fh,
7456 struct pnfs_devicelist *devlist)
7457{
7458 struct nfs4_getdevicelist_args args = {
7459 .fh = fh,
7460 .layoutclass = server->pnfs_curr_ld->id,
7461 };
7462 struct nfs4_getdevicelist_res res = {
7463 .devlist = devlist,
7464 };
7465 struct rpc_message msg = {
7466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7467 .rpc_argp = &args,
7468 .rpc_resp = &res,
7469 };
7470 int status;
7471
7472 dprintk("--> %s\n", __func__);
7473 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7474 &res.seq_res, 0);
7475 dprintk("<-- %s status=%d\n", __func__, status);
7476 return status;
7477}
7478
7479int nfs4_proc_getdevicelist(struct nfs_server *server,
7480 const struct nfs_fh *fh,
7481 struct pnfs_devicelist *devlist)
7482{
7483 struct nfs4_exception exception = { };
7484 int err;
7485
7486 do {
7487 err = nfs4_handle_exception(server,
7488 _nfs4_getdevicelist(server, fh, devlist),
7489 &exception);
7490 } while (exception.retry);
7491
7492 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7493 err, devlist->num_devs);
7494
7495 return err;
7496}
7497EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7498
b1f69b75 7499static int
cd5875fe
TM		 7500_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7501 struct pnfs_device *pdev,
7502 struct rpc_cred *cred)
b1f69b75
AA		 7503{
7504 struct nfs4_getdeviceinfo_args args = {
7505 .pdev = pdev,
7506 };
7507 struct nfs4_getdeviceinfo_res res = {
7508 .pdev = pdev,
7509 };
7510 struct rpc_message msg = {
7511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7512 .rpc_argp = &args,
7513 .rpc_resp = &res,
cd5875fe 7514 .rpc_cred = cred,
b1f69b75
AA		 7515 };
7516 int status;
7517
7518 dprintk("--> %s\n", __func__);
7c513058 7519 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7520 dprintk("<-- %s status=%d\n", __func__, status);
7521
7522 return status;
7523}
7524
cd5875fe
TM		 7525int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7526 struct pnfs_device *pdev,
7527 struct rpc_cred *cred)
b1f69b75
AA		 7528{
7529 struct nfs4_exception exception = { };
7530 int err;
7531
7532 do {
7533 err = nfs4_handle_exception(server,
cd5875fe 7534 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7535 &exception);
7536 } while (exception.retry);
7537 return err;
7538}
7539EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7540
863a3c6c
AA		 7541static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7542{
7543 struct nfs4_layoutcommit_data *data = calldata;
7544 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7545 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7546
d9afbd1b
TM		 7547 nfs41_setup_sequence(session,
7548 &data->args.seq_args,
7549 &data->res.seq_res,
7550 task);
863a3c6c
AA		 7551}
7552
7553static void
7554nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7555{
7556 struct nfs4_layoutcommit_data *data = calldata;
7557 struct nfs_server *server = NFS_SERVER(data->args.inode);
7558
6ba7db34 7559 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7560 return;
7561
7562 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7563 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7564 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7565 case -NFS4ERR_BADLAYOUT: /* no layout */
7566 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7567 task->tk_status = 0;
e59d27e0
TM		 7568 break;
7569 case 0:
863a3c6c
AA		 7570 nfs_post_op_update_inode_force_wcc(data->args.inode,
7571 data->res.fattr);
e59d27e0
TM		 7572 break;
7573 default:
7574 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7575 rpc_restart_call_prepare(task);
7576 return;
7577 }
7578 }
863a3c6c
AA		 7579}
7580
7581static void nfs4_layoutcommit_release(void *calldata)
7582{
7583 struct nfs4_layoutcommit_data *data = calldata;
7584
db29c089 7585 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7586 put_rpccred(data->cred);
7587 kfree(data);
7588}
7589
7590static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7591 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7592 .rpc_call_done = nfs4_layoutcommit_done,
7593 .rpc_release = nfs4_layoutcommit_release,
7594};
7595
7596int
ef311537 7597nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7598{
7599 struct rpc_message msg = {
7600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7601 .rpc_argp = &data->args,
7602 .rpc_resp = &data->res,
7603 .rpc_cred = data->cred,
7604 };
7605 struct rpc_task_setup task_setup_data = {
7606 .task = &data->task,
7607 .rpc_client = NFS_CLIENT(data->args.inode),
7608 .rpc_message = &msg,
7609 .callback_ops = &nfs4_layoutcommit_ops,
7610 .callback_data = data,
7611 .flags = RPC_TASK_ASYNC,
7612 };
7613 struct rpc_task *task;
7614 int status = 0;
7615
7616 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7617 "lbw: %llu inode %lu\n",
7618 data->task.tk_pid, sync,
7619 data->args.lastbytewritten,
7620 data->args.inode->i_ino);
7621
a9c92d6b 7622 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7623 task = rpc_run_task(&task_setup_data);
7624 if (IS_ERR(task))
7625 return PTR_ERR(task);
ef311537 7626 if (sync == false)
863a3c6c
AA		 7627 goto out;
7628 status = nfs4_wait_for_completion_rpc_task(task);
7629 if (status != 0)
7630 goto out;
7631 status = task->tk_status;
1037e6ea 7632 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7633out:
7634 dprintk("%s: status %d\n", __func__, status);
7635 rpc_put_task(task);
7636 return status;
7637}
fca78d6d 7638
97431204
AA		 7639/**
7640 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7641 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7642 */
fca78d6d
BS		 7643static int
7644_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7645 struct nfs_fsinfo *info,
7646 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7647{
7648 struct nfs41_secinfo_no_name_args args = {
7649 .style = SECINFO_STYLE_CURRENT_FH,
7650 };
7651 struct nfs4_secinfo_res res = {
7652 .flavors = flavors,
7653 };
7654 struct rpc_message msg = {
7655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7656 .rpc_argp = &args,
7657 .rpc_resp = &res,
7658 };
b1b3e136 7659 struct rpc_clnt *clnt = server->client;
7cb852df 7660 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7661 int status;
7662
7663 if (use_integrity) {
7664 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7665 cred = nfs4_get_clid_cred(server->nfs_client);
7666 msg.rpc_cred = cred;
b1b3e136
WAA		 7667 }
7668
7669 dprintk("--> %s\n", __func__);
7670 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7671 &res.seq_res, 0);
7672 dprintk("<-- %s status=%d\n", __func__, status);
7673
7cb852df
WAA		 7674 if (cred)
7675 put_rpccred(cred);
b1b3e136
WAA		 7676
7677 return status;
fca78d6d
BS		 7678}
7679
7680static int
7681nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7682 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7683{
7684 struct nfs4_exception exception = { };
7685 int err;
7686 do {
b1b3e136
WAA		 7687 /* first try using integrity protection */
7688 err = -NFS4ERR_WRONGSEC;
7689
7690 /* try to use integrity protection with machine cred */
7691 if (_nfs4_is_integrity_protected(server->nfs_client))
7692 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7693 flavors, true);
7694
7695 /*
7696 * if unable to use integrity protection, or SECINFO with
7697 * integrity protection returns NFS4ERR_WRONGSEC (which is
7698 * disallowed by spec, but exists in deployed servers) use
7699 * the current filesystem's rpc_client and the user cred.
7700 */
7701 if (err == -NFS4ERR_WRONGSEC)
7702 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7703 flavors, false);
7704
fca78d6d
BS		 7705 switch (err) {
7706 case 0:
7707 case -NFS4ERR_WRONGSEC:
7708 case -NFS4ERR_NOTSUPP:
05e9cfb4 7709 goto out;
fca78d6d
BS		 7710 default:
7711 err = nfs4_handle_exception(server, err, &exception);
7712 }
7713 } while (exception.retry);
05e9cfb4 7714out:
fca78d6d
BS		 7715 return err;
7716}
7717
7718static int
7719nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7720 struct nfs_fsinfo *info)
7721{
7722 int err;
7723 struct page *page;
367156d9 7724 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7725 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7726 struct nfs4_secinfo4 *secinfo;
7727 int i;
fca78d6d
BS		 7728
7729 page = alloc_page(GFP_KERNEL);
7730 if (!page) {
7731 err = -ENOMEM;
7732 goto out;
7733 }
7734
7735 flavors = page_address(page);
7736 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7737
7738 /*
7739 * Fall back on "guess and check" method if
7740 * the server doesn't support SECINFO_NO_NAME
7741 */
7742 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7743 err = nfs4_find_root_sec(server, fhandle, info);
7744 goto out_freepage;
7745 }
7746 if (err)
7747 goto out_freepage;
7748
58a8cf12
WAA		 7749 for (i = 0; i < flavors->num_flavors; i++) {
7750 secinfo = &flavors->flavors[i];
7751
7752 switch (secinfo->flavor) {
7753 case RPC_AUTH_NULL:
7754 case RPC_AUTH_UNIX:
7755 case RPC_AUTH_GSS:
7756 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7757 &secinfo->flavor_info);
7758 break;
7759 default:
7760 flavor = RPC_AUTH_MAXFLAVOR;
7761 break;
7762 }
7763
7764 if (flavor != RPC_AUTH_MAXFLAVOR) {
7765 err = nfs4_lookup_root_sec(server, fhandle,
7766 info, flavor);
7767 if (!err)
7768 break;
7769 }
7770 }
7771
7772 if (flavor == RPC_AUTH_MAXFLAVOR)
7773 err = -EPERM;
fca78d6d
BS		 7774
7775out_freepage:
7776 put_page(page);
7777 if (err == -EACCES)
7778 return -EPERM;
7779out:
7780 return err;
7781}
1cab0652 7782
ab7cb0df
TM		 7783static int _nfs41_test_stateid(struct nfs_server *server,
7784 nfs4_stateid *stateid,
7785 struct rpc_cred *cred)
7d974794
BS		 7786{
7787 int status;
7788 struct nfs41_test_stateid_args args = {
1cab0652 7789 .stateid = stateid,
7d974794
BS		 7790 };
7791 struct nfs41_test_stateid_res res;
7792 struct rpc_message msg = {
7793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7794 .rpc_argp = &args,
7795 .rpc_resp = &res,
ab7cb0df 7796 .rpc_cred = cred,
7d974794 7797 };
3787d506
WAA		 7798 struct rpc_clnt *rpc_client = server->client;
7799
7800 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7801 &rpc_client, &msg);
1cab0652 7802
38527b15 7803 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7804 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 7805 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 7806 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 7807 &args.seq_args, &res.seq_res);
38527b15
CL		 7808 if (status != NFS_OK) {
7809 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7810 return status;
38527b15
CL		 7811 }
7812 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7813 return -res.status;
7d974794
BS		 7814}
7815
38527b15
CL		 7816/**
7817 * nfs41_test_stateid - perform a TEST_STATEID operation
7818 *
7819 * @server: server / transport on which to perform the operation
7820 * @stateid: state ID to test
ab7cb0df 7821 * @cred: credential
38527b15
CL		 7822 *
7823 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7824 * Otherwise a negative NFS4ERR value is returned if the operation
7825 * failed or the state ID is not currently valid.
7826 */
ab7cb0df
TM		 7827static int nfs41_test_stateid(struct nfs_server *server,
7828 nfs4_stateid *stateid,
7829 struct rpc_cred *cred)
7d974794
BS		 7830{
7831 struct nfs4_exception exception = { };
7832 int err;
7833 do {
ab7cb0df 7834 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7835 if (err != -NFS4ERR_DELAY)
7836 break;
7837 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7838 } while (exception.retry);
7839 return err;
7840}
9aeda35f 7841
7c1d5fae
TM		 7842struct nfs_free_stateid_data {
7843 struct nfs_server *server;
7844 struct nfs41_free_stateid_args args;
9aeda35f 7845 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7846};
7847
7848static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7849{
7850 struct nfs_free_stateid_data *data = calldata;
7851 nfs41_setup_sequence(nfs4_get_session(data->server),
7852 &data->args.seq_args,
7853 &data->res.seq_res,
7854 task);
7855}
7856
7857static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7858{
7859 struct nfs_free_stateid_data *data = calldata;
7860
7861 nfs41_sequence_done(task, &data->res.seq_res);
7862
7863 switch (task->tk_status) {
7864 case -NFS4ERR_DELAY:
7865 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7866 rpc_restart_call_prepare(task);
7867 }
7868}
7869
7870static void nfs41_free_stateid_release(void *calldata)
7871{
7872 kfree(calldata);
7873}
7874
17f26b12 7875static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7876 .rpc_call_prepare = nfs41_free_stateid_prepare,
7877 .rpc_call_done = nfs41_free_stateid_done,
7878 .rpc_release = nfs41_free_stateid_release,
7879};
7880
7881static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7882 nfs4_stateid *stateid,
ab7cb0df 7883 struct rpc_cred *cred,
7c1d5fae
TM		 7884 bool privileged)
7885{
9aeda35f
BS		 7886 struct rpc_message msg = {
7887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7888 .rpc_cred = cred,
9aeda35f 7889 };
7c1d5fae
TM		 7890 struct rpc_task_setup task_setup = {
7891 .rpc_client = server->client,
7892 .rpc_message = &msg,
7893 .callback_ops = &nfs41_free_stateid_ops,
7894 .flags = RPC_TASK_ASYNC,
7895 };
7896 struct nfs_free_stateid_data *data;
9aeda35f 7897
3787d506
WAA		 7898 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7899 &task_setup.rpc_client, &msg);
7900
38527b15 7901 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7902 data = kmalloc(sizeof(*data), GFP_NOFS);
7903 if (!data)
7904 return ERR_PTR(-ENOMEM);
7905 data->server = server;
7906 nfs4_stateid_copy(&data->args.stateid, stateid);
7907
7908 task_setup.callback_data = data;
7909
7910 msg.rpc_argp = &data->args;
7911 msg.rpc_resp = &data->res;
a9c92d6b 7912 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 7913 if (privileged)
7914 nfs4_set_sequence_privileged(&data->args.seq_args);
7915
7916 return rpc_run_task(&task_setup);
9aeda35f
BS		 7917}
7918
38527b15
CL		 7919/**
7920 * nfs41_free_stateid - perform a FREE_STATEID operation
7921 *
7922 * @server: server / transport on which to perform the operation
7923 * @stateid: state ID to release
ab7cb0df 7924 * @cred: credential
38527b15
CL		 7925 *
7926 * Returns NFS_OK if the server freed "stateid". Otherwise a
7927 * negative NFS4ERR value is returned.
7928 */
ab7cb0df
TM		 7929static int nfs41_free_stateid(struct nfs_server *server,
7930 nfs4_stateid *stateid,
7931 struct rpc_cred *cred)
9aeda35f 7932{
7c1d5fae
TM		 7933 struct rpc_task *task;
7934 int ret;
7935
ab7cb0df 7936 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7937 if (IS_ERR(task))
7938 return PTR_ERR(task);
7939 ret = rpc_wait_for_completion_task(task);
7940 if (!ret)
7941 ret = task->tk_status;
7942 rpc_put_task(task);
7943 return ret;
9aeda35f 7944}
36281caa 7945
c8b2d0bf
TM		 7946static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7947{
7948 struct rpc_task *task;
ab7cb0df 7949 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7950
ab7cb0df 7951 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7952 nfs4_free_lock_state(server, lsp);
7953 if (IS_ERR(task))
7954 return PTR_ERR(task);
7955 rpc_put_task(task);
7956 return 0;
7957}
7958
36281caa
TM		 7959static bool nfs41_match_stateid(const nfs4_stateid *s1,
7960 const nfs4_stateid *s2)
7961{
2d2f24ad 7962 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7963 return false;
7964
2d2f24ad 7965 if (s1->seqid == s2->seqid)
36281caa 7966 return true;
2d2f24ad 7967 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7968 return true;
7969
7970 return false;
7971}
7972
557134a3
AA		 7973#endif /* CONFIG_NFS_V4_1 */
7974
36281caa
TM		 7975static bool nfs4_match_stateid(const nfs4_stateid *s1,
7976 const nfs4_stateid *s2)
7977{
f597c537 7978 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7979}
7980
7981
17280175 7982static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7983 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7984 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7985 .recover_open = nfs4_open_reclaim,
7986 .recover_lock = nfs4_lock_reclaim,
591d71cb 7987 .establish_clid = nfs4_init_clientid,
05f4c350 7988 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7989};
7990
591d71cb 7991#if defined(CONFIG_NFS_V4_1)
17280175 7992static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7993 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7994 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7995 .recover_open = nfs4_open_reclaim,
7996 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7997 .establish_clid = nfs41_init_clientid,
fce5c838 7998 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7999 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8000};
8001#endif /* CONFIG_NFS_V4_1 */
8002
17280175 8003static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8004 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8005 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8006 .recover_open = nfs4_open_expired,
8007 .recover_lock = nfs4_lock_expired,
8008 .establish_clid = nfs4_init_clientid,
8009};
8010
8011#if defined(CONFIG_NFS_V4_1)
17280175 8012static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8013 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8014 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8015 .recover_open = nfs41_open_expired,
8016 .recover_lock = nfs41_lock_expired,
4d643d1d 8017 .establish_clid = nfs41_init_clientid,
1da177e4 8018};
591d71cb 8019#endif /* CONFIG_NFS_V4_1 */
1da177e4 8020
17280175 8021static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8022 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8023 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8024 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8025};
8026
8027#if defined(CONFIG_NFS_V4_1)
17280175 8028static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8029 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8030 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8031 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8032};
8033#endif
8034
ec011fe8 8035static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8036 .get_locations = _nfs40_proc_get_locations,
ec011fe8
CL		 8037};
8038
8039#if defined(CONFIG_NFS_V4_1)
8040static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8041 .get_locations = _nfs41_proc_get_locations,
ec011fe8
CL		 8042};
8043#endif /* CONFIG_NFS_V4_1 */
8044
97dc1359
TM		 8045static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8046 .minor_version = 0,
39c6daae
TM		 8047 .init_caps = NFS_CAP_READDIRPLUS
8048 | NFS_CAP_ATOMIC_OPEN
8049 | NFS_CAP_CHANGE_ATTR
8050 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8051 .init_client = nfs40_init_client,
8052 .shutdown_client = nfs40_shutdown_client,
36281caa 8053 .match_stateid = nfs4_match_stateid,
fca78d6d 8054 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8055 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8056 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8057 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8058 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8059 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8060 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8061};
8062
8063#if defined(CONFIG_NFS_V4_1)
8064static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8065 .minor_version = 1,
39c6daae
TM		 8066 .init_caps = NFS_CAP_READDIRPLUS
8067 | NFS_CAP_ATOMIC_OPEN
8068 | NFS_CAP_CHANGE_ATTR
3b66486c 8069 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8070 | NFS_CAP_STATEID_NFSV41
8071 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8072 .init_client = nfs41_init_client,
8073 .shutdown_client = nfs41_shutdown_client,
36281caa 8074 .match_stateid = nfs41_match_stateid,
fca78d6d 8075 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8076 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8077 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8078 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8079 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8080 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8081 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8082};
8083#endif
8084
42c2c424
SD		 8085#if defined(CONFIG_NFS_V4_2)
8086static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8087 .minor_version = 2,
7017310a
BS		 8088 .init_caps = NFS_CAP_READDIRPLUS
8089 | NFS_CAP_ATOMIC_OPEN
8090 | NFS_CAP_CHANGE_ATTR
8091 | NFS_CAP_POSIX_LOCK
8092 | NFS_CAP_STATEID_NFSV41
8093 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8094 .init_client = nfs41_init_client,
8095 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8096 .match_stateid = nfs41_match_stateid,
8097 .find_root_sec = nfs41_find_root_sec,
7017310a 8098 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8099 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8100 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8101 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8102 .state_renewal_ops = &nfs41_state_renewal_ops,
8103};
8104#endif
8105
97dc1359
TM		 8106const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8107 [0] = &nfs_v4_0_minor_ops,
8108#if defined(CONFIG_NFS_V4_1)
8109 [1] = &nfs_v4_1_minor_ops,
8110#endif
42c2c424
SD		 8111#if defined(CONFIG_NFS_V4_2)
8112 [2] = &nfs_v4_2_minor_ops,
8113#endif
97dc1359
TM		 8114};
8115
17f26b12 8116static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8117 .create = nfs_create,
8118 .lookup = nfs_lookup,
8119 .atomic_open = nfs_atomic_open,
8120 .link = nfs_link,
8121 .unlink = nfs_unlink,
8122 .symlink = nfs_symlink,
8123 .mkdir = nfs_mkdir,
8124 .rmdir = nfs_rmdir,
8125 .mknod = nfs_mknod,
8126 .rename = nfs_rename,
8127 .permission = nfs_permission,
8128 .getattr = nfs_getattr,
8129 .setattr = nfs_setattr,
8130 .getxattr = generic_getxattr,
8131 .setxattr = generic_setxattr,
8132 .listxattr = generic_listxattr,
8133 .removexattr = generic_removexattr,
8134};
8135
92e1d5be 8136static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8137 .permission = nfs_permission,
8138 .getattr = nfs_getattr,
8139 .setattr = nfs_setattr,
64c2ce8b
AK		 8140 .getxattr = generic_getxattr,
8141 .setxattr = generic_setxattr,
8142 .listxattr = generic_listxattr,
8143 .removexattr = generic_removexattr,
6b3b5496
BF		 8144};
8145
509de811 8146const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8147 .version = 4, /* protocol version */
8148 .dentry_ops = &nfs4_dentry_operations,
8149 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8150 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8151 .file_ops = &nfs4_file_operations,
1da177e4 8152 .getroot = nfs4_proc_get_root,
281cad46 8153 .submount = nfs4_submount,
ff9099f2 8154 .try_mount = nfs4_try_mount,
1da177e4
LT		 8155 .getattr = nfs4_proc_getattr,
8156 .setattr = nfs4_proc_setattr,
8157 .lookup = nfs4_proc_lookup,
8158 .access = nfs4_proc_access,
8159 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8160 .create = nfs4_proc_create,
8161 .remove = nfs4_proc_remove,
8162 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8163 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8164 .unlink_done = nfs4_proc_unlink_done,
8165 .rename = nfs4_proc_rename,
d3d4152a 8166 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8167 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8168 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8169 .link = nfs4_proc_link,
8170 .symlink = nfs4_proc_symlink,
8171 .mkdir = nfs4_proc_mkdir,
8172 .rmdir = nfs4_proc_remove,
8173 .readdir = nfs4_proc_readdir,
8174 .mknod = nfs4_proc_mknod,
8175 .statfs = nfs4_proc_statfs,
8176 .fsinfo = nfs4_proc_fsinfo,
8177 .pathconf = nfs4_proc_pathconf,
e9326dca 8178 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8179 .decode_dirent = nfs4_decode_dirent,
8180 .read_setup = nfs4_proc_read_setup,
1abb5088 8181 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8182 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8183 .read_done = nfs4_read_done,
1da177e4 8184 .write_setup = nfs4_proc_write_setup,
57208fa7 8185 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8186 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8187 .write_done = nfs4_write_done,
1da177e4 8188 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8189 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8190 .commit_done = nfs4_commit_done,
1da177e4 8191 .lock = nfs4_proc_lock,
e50a1c2e 8192 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8193 .close_context = nfs4_close_context,
2b484297 8194 .open_context = nfs4_atomic_open,
011e2a7f 8195 .have_delegation = nfs4_have_delegation,
57ec14c5 8196 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8197 .alloc_client = nfs4_alloc_client,
45a52a02 8198 .init_client = nfs4_init_client,
cdb7eced 8199 .free_client = nfs4_free_client,
1179acc6
BS		 8200 .create_server = nfs4_create_server,
8201 .clone_server = nfs_clone_server,
1da177e4
LT		 8202};
8203
64c2ce8b
AK		 8204static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8205 .prefix = XATTR_NAME_NFSV4_ACL,
8206 .list = nfs4_xattr_list_nfs4_acl,
8207 .get = nfs4_xattr_get_nfs4_acl,
8208 .set = nfs4_xattr_set_nfs4_acl,
8209};
8210
8211const struct xattr_handler *nfs4_xattr_handlers[] = {
8212 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8213#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8214 &nfs4_xattr_nfs4_label_handler,
8215#endif
64c2ce8b
AK		 8216 NULL
8217};
8218
1da177e4
LT		 8219/*
8220 * Local variables:
8221 * c-basic-offset: 8
8222 * End:
8223 */
Linux 6.x block layer and io_uring tree(s)