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NFSv4.1: Fix a race in nfs4_write_inode
[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
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
65de872e
TM		 317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 327 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
b064eca2 337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 338{
339 struct nfs_client *clp = server->nfs_client;
9e33bed5 340 struct nfs4_state *state = exception->state;
3114ea7a 341 struct inode *inode = exception->inode;
65de872e
TM		 342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
3114ea7a 348 case -NFS4ERR_OPENMODE:
011e2a7f 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 350 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
5d422301
TM		 356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
3114ea7a 359 goto wait_on_recovery;
a1d0b5ee 360 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
9e33bed5
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
0400a6b0 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
542 if (!RPC_WAS_SENT(task))
543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
c10e4498 562 bool send_new_highest_used_slotid = false;
13615871 563
dfb4f309 564 if (!res->sr_slot) {
13615871
AA		 565 /* just wake up the next guy waiting since
566 * we may have not consumed a slot after all */
691daf3b 567 dprintk("%s: No slot\n", __func__);
35dc1d74 568 return;
13615871 569 }
e3725ec0
TM		 570 tbl = res->sr_slot->table;
571 session = tbl->session;
ea028ac9 572
35dc1d74 573 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 574 /* Be nice to the server: try to ensure that the last transmitted
575 * value for highest_user_slotid <= target_highest_slotid
576 */
577 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
578 send_new_highest_used_slotid = true;
579
b75ad4cd
TM		 580 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
581 send_new_highest_used_slotid = false;
582 goto out_unlock;
583 }
f4af6e2a 584 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 585
586 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
587 send_new_highest_used_slotid = false;
b75ad4cd 588out_unlock:
35dc1d74 589 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 590 res->sr_slot = NULL;
c10e4498
TM		 591 if (send_new_highest_used_slotid)
592 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 593}
594
14516c3a 595static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 596{
e3725ec0 597 struct nfs4_session *session;
933602e3 598 struct nfs4_slot *slot;
14516c3a 599 struct nfs_client *clp;
ac20d163 600 bool interrupted = false;
85563073 601 int ret = 1;
b0df806c 602
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
933602e3 607 slot = res->sr_slot;
e3725ec0 608 session = slot->table->session;
933602e3 609
ac20d163
TM		 610 if (slot->interrupted) {
611 slot->interrupted = 0;
612 interrupted = true;
613 }
614
2f92ae34 615 trace_nfs4_sequence_done(session, res);
691daf3b 616 /* Check the SEQUENCE operation status */
14516c3a
TM		 617 switch (res->sr_status) {
618 case 0:
b0df806c 619 /* Update the slot's sequence and clientid lease timer */
933602e3 620 ++slot->seq_nr;
e3725ec0 621 clp = session->clp;
8e63b6a8 622 do_renew_lease(clp, res->sr_timestamp);
0629e370 623 /* Check sequence flags */
b4410c2f
TM		 624 if (res->sr_status_flags != 0)
625 nfs4_schedule_lease_recovery(clp);
464ee9f9 626 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 627 break;
ac20d163
TM		 628 case 1:
629 /*
630 * sr_status remains 1 if an RPC level error occurred.
631 * The server may or may not have processed the sequence
632 * operation..
633 * Mark the slot as having hosted an interrupted RPC call.
634 */
635 slot->interrupted = 1;
636 goto out;
14516c3a
TM		 637 case -NFS4ERR_DELAY:
638 /* The server detected a resend of the RPC call and
639 * returned NFS4ERR_DELAY as per Section 2.10.6.2
640 * of RFC5661.
641 */
df2fabff 642 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 643 __func__,
df2fabff 644 slot->slot_nr,
933602e3 645 slot->seq_nr);
14516c3a 646 goto out_retry;
85563073
TM		 647 case -NFS4ERR_BADSLOT:
648 /*
649 * The slot id we used was probably retired. Try again
650 * using a different slot id.
651 */
e8794440
TM		 652 goto retry_nowait;
653 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 654 /*
655 * Was the last operation on this sequence interrupted?
656 * If so, retry after bumping the sequence number.
657 */
658 if (interrupted) {
659 ++slot->seq_nr;
660 goto retry_nowait;
661 }
e8794440
TM		 662 /*
663 * Could this slot have been previously retired?
664 * If so, then the server may be expecting seq_nr = 1!
665 */
8e63b6a8
TM		 666 if (slot->seq_nr != 1) {
667 slot->seq_nr = 1;
668 goto retry_nowait;
669 }
670 break;
e8794440
TM		 671 case -NFS4ERR_SEQ_FALSE_RETRY:
672 ++slot->seq_nr;
673 goto retry_nowait;
14516c3a
TM		 674 default:
675 /* Just update the slot sequence no. */
933602e3 676 ++slot->seq_nr;
b0df806c
AA		 677 }
678out:
679 /* The session may be reset by one of the error handlers. */
680 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 681 nfs41_sequence_free_slot(res);
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c
AA		 694}
695
14516c3a
TM		 696static int nfs4_sequence_done(struct rpc_task *task,
697 struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455
TM		 704}
705
dc70d7b3 706int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 707 struct nfs4_sequence_args *args,
708 struct nfs4_sequence_res *res,
ce5039c1
AA		 709 struct rpc_task *task)
710{
fbcd4abc
AA		 711 struct nfs4_slot *slot;
712 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 713
714 dprintk("--> %s\n", __func__);
ce5039c1 715 /* slot already allocated? */
dfb4f309 716 if (res->sr_slot != NULL)
d9afbd1b 717 goto out_success;
ce5039c1 718
fbcd4abc
AA		 719 tbl = &session->fc_slot_table;
720
69d206b5
TM		 721 task->tk_timeout = 0;
722
fbcd4abc 723 spin_lock(&tbl->slot_tbl_lock);
774d5f14 724 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 725 !args->sa_privileged) {
0b1c8fc4 726 /* The state manager will wait until the slot table is empty */
0b1c8fc4 727 dprintk("%s session is draining\n", __func__);
7b939a3f 728 goto out_sleep;
689cf5c1
AB		 729 }
730
2dc03b7f 731 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 732 if (IS_ERR(slot)) {
733 /* If out of memory, try again in 1/4 second */
734 if (slot == ERR_PTR(-ENOMEM))
735 task->tk_timeout = HZ >> 2;
fbcd4abc 736 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 737 goto out_sleep;
fbcd4abc
AA		 738 }
739 spin_unlock(&tbl->slot_tbl_lock);
740
2b2fa717 741 args->sa_slot = slot;
fbcd4abc 742
e8d92382 743 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 744 slot->slot_nr, slot->seq_nr);
fbcd4abc 745
dfb4f309 746 res->sr_slot = slot;
8e63b6a8 747 res->sr_timestamp = jiffies;
2a6e26cd 748 res->sr_status_flags = 0;
fbcd4abc
AA		 749 /*
750 * sr_status is only set in decode_sequence, and so will remain
751 * set to 1 if an rpc level failure occurs.
752 */
753 res->sr_status = 1;
2f92ae34 754 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 755out_success:
756 rpc_call_start(task);
ce5039c1 757 return 0;
7b939a3f 758out_sleep:
8fe72bac
TM		 759 /* Privileged tasks are queued with top priority */
760 if (args->sa_privileged)
1e1093c7
TM		 761 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
762 NULL, RPC_PRIORITY_PRIVILEGED);
763 else
764 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 765 spin_unlock(&tbl->slot_tbl_lock);
766 return -EAGAIN;
ce5039c1 767}
dc70d7b3 768EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 769
5a580e0a
CL		 770static int nfs4_setup_sequence(const struct nfs_server *server,
771 struct nfs4_sequence_args *args,
772 struct nfs4_sequence_res *res,
773 struct rpc_task *task)
ce5039c1 774{
035168ab 775 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 776 int ret = 0;
777
3bd2384a
CL		 778 if (!session)
779 return nfs40_setup_sequence(server, args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
3bd2384a 820 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 821}
822
823static int nfs4_sequence_done(struct rpc_task *task,
824 struct nfs4_sequence_res *res)
825{
3bd2384a 826 return nfs40_sequence_done(task, res);
9915ea7e 827}
3bd2384a
CL		 828
829#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 830
831static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_setup_sequence(data->seq_server,
835 data->seq_args, data->seq_res, task);
836}
837
838static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
839{
840 struct nfs4_call_sync_data *data = calldata;
841 nfs4_sequence_done(task, data->seq_res);
842}
843
844static const struct rpc_call_ops nfs40_call_sync_ops = {
845 .rpc_call_prepare = nfs40_call_sync_prepare,
846 .rpc_call_done = nfs40_call_sync_done,
847};
848
7c513058
BS		 849static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
850 struct nfs_server *server,
ce5039c1
AA		 851 struct rpc_message *msg,
852 struct nfs4_sequence_args *args,
8fe72bac 853 struct nfs4_sequence_res *res)
ce5039c1
AA		 854{
855 int ret;
856 struct rpc_task *task;
9915ea7e 857 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 858 struct nfs4_call_sync_data data = {
035168ab 859 .seq_server = server,
ce5039c1
AA		 860 .seq_args = args,
861 .seq_res = res,
ce5039c1
AA		 862 };
863 struct rpc_task_setup task_setup = {
7c513058 864 .rpc_client = clnt,
ce5039c1 865 .rpc_message = msg,
9915ea7e 866 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 867 .callback_data = &data
868 };
869
ce5039c1
AA		 870 task = rpc_run_task(&task_setup);
871 if (IS_ERR(task))
872 ret = PTR_ERR(task);
873 else {
874 ret = task->tk_status;
875 rpc_put_task(task);
876 }
877 return ret;
878}
879
fd0c0953 880static
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
981
8535b2be 982 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 983 if (p == NULL)
984 goto err;
14c43f76
DQ		 985
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
988 goto err_free_p;
989
8535b2be 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 991 if (p->o_arg.seqid == NULL)
14c43f76 992 goto err_free_label;
82a2c1b7
AV		 993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
e56e0b78
TM		 995 p->dir = parent;
996 p->owner = sp;
997 atomic_inc(&sp->so_count);
dc0b027d
TM		 998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1004 * are cached */
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1007 }
7539bbab 1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1011 p->o_arg.name = &dentry->d_name;
e56e0b78 1012 p->o_arg.server = server;
aa9c2669 1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1015 p->o_arg.label = label;
49f9a0fa
TM		 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
4a1c0893
TM		 1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1022 break;
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1028 }
536e43d1 1029 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1030 __u32 verf[2];
d77d76ff 1031
e56e0b78
TM		 1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1034
1035 verf[0] = jiffies;
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1039 }
cdd4e68b
TM		 1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1043 nfs4_init_opendata_res(p);
c6d00e63 1044 kref_init(&p->kref);
e56e0b78 1045 return p;
14c43f76
DQ		 1046
1047err_free_label:
1048 nfs4_label_free(p->f_label);
1049err_free_p:
e56e0b78
TM		 1050 kfree(p);
1051err:
1052 dput(parent);
1053 return NULL;
1054}
1055
c6d00e63 1056static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1057{
c6d00e63
TM		 1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
82a2c1b7 1060 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1061
1062 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
c6d00e63 1065 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1066
1067 nfs4_label_free(p->f_label);
1068
c6d00e63 1069 dput(p->dir);
82a2c1b7
AV		 1070 dput(p->dentry);
1071 nfs_sb_deactive(sb);
6926afd1 1072 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1073 kfree(p);
1074}
1075
1076static void nfs4_opendata_put(struct nfs4_opendata *p)
1077{
1078 if (p != NULL)
1079 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1080}
1081
06f814a3
TM		 1082static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1083{
06f814a3
TM		 1084 int ret;
1085
06f814a3 1086 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1087 return ret;
1088}
1089
dc0b027d 1090static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1091{
1092 int ret = 0;
dc0b027d 1093
536e43d1 1094 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1095 goto out;
1096 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1097 case FMODE_READ:
88069f77
TM		 1098 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1099 && state->n_rdonly != 0;
6ee41268
TM		 1100 break;
1101 case FMODE_WRITE:
88069f77
TM		 1102 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1103 && state->n_wronly != 0;
6ee41268
TM		 1104 break;
1105 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1106 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1107 && state->n_rdwr != 0;
6ee41268 1108 }
dc0b027d 1109out:
6ee41268
TM		 1110 return ret;
1111}
1112
dc0b027d 1113static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1114{
652f89f6
TM		 1115 if (delegation == NULL)
1116 return 0;
dc0b027d 1117 if ((delegation->type & fmode) != fmode)
aac00a8d 1118 return 0;
15c831bf 1119 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1120 return 0;
d25be546
TM		 1121 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 return 0;
b7391f44 1123 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1124 return 1;
1125}
1126
dc0b027d 1127static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1128{
dc0b027d 1129 switch (fmode) {
e7616923
TM		 1130 case FMODE_WRITE:
1131 state->n_wronly++;
1132 break;
1133 case FMODE_READ:
1134 state->n_rdonly++;
1135 break;
1136 case FMODE_READ|FMODE_WRITE:
1137 state->n_rdwr++;
1138 }
dc0b027d 1139 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1140}
1141
dc0b027d 1142static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1143{
1144 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1145 nfs4_stateid_copy(&state->stateid, stateid);
1146 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1147 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1148 switch (fmode) {
003707c7
TM		 1149 case FMODE_READ:
1150 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1151 break;
1152 case FMODE_WRITE:
1153 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1154 break;
1155 case FMODE_READ|FMODE_WRITE:
1156 set_bit(NFS_O_RDWR_STATE, &state->flags);
1157 }
e7616923
TM		 1158}
1159
dc0b027d 1160static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1161{
8bda4e4c 1162 write_seqlock(&state->seqlock);
dc0b027d 1163 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1164 write_sequnlock(&state->seqlock);
003707c7
TM		 1165}
1166
dc0b027d 1167static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1168{
8bda4e4c
TM		 1169 /*
1170 * Protect the call to nfs4_state_set_mode_locked and
1171 * serialise the stateid update
1172 */
1173 write_seqlock(&state->seqlock);
003707c7 1174 if (deleg_stateid != NULL) {
f597c537 1175 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1176 set_bit(NFS_DELEGATED_STATE, &state->flags);
1177 }
1178 if (open_stateid != NULL)
dc0b027d 1179 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1180 write_sequnlock(&state->seqlock);
1181 spin_lock(&state->owner->so_lock);
dc0b027d 1182 update_open_stateflags(state, fmode);
ec073428 1183 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1184}
1185
dc0b027d 1186static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1187{
1188 struct nfs_inode *nfsi = NFS_I(state->inode);
1189 struct nfs_delegation *deleg_cur;
1190 int ret = 0;
1191
dc0b027d 1192 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1193
1194 rcu_read_lock();
1195 deleg_cur = rcu_dereference(nfsi->delegation);
1196 if (deleg_cur == NULL)
1197 goto no_delegation;
1198
1199 spin_lock(&deleg_cur->lock);
17f26b12 1200 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1201 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1202 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1203 goto no_delegation_unlock;
1204
1205 if (delegation == NULL)
1206 delegation = &deleg_cur->stateid;
f597c537 1207 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1208 goto no_delegation_unlock;
1209
b7391f44 1210 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1211 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1212 ret = 1;
1213no_delegation_unlock:
1214 spin_unlock(&deleg_cur->lock);
1215no_delegation:
1216 rcu_read_unlock();
1217
1218 if (!ret && open_stateid != NULL) {
dc0b027d 1219 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1220 ret = 1;
1221 }
1222
1223 return ret;
1224}
1225
1226
dc0b027d 1227static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1228{
1229 struct nfs_delegation *delegation;
1230
1231 rcu_read_lock();
1232 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1233 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1234 rcu_read_unlock();
1235 return;
1236 }
1237 rcu_read_unlock();
57ec14c5 1238 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1239}
1240
6ee41268 1241static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1242{
1243 struct nfs4_state *state = opendata->state;
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *delegation;
f448badd 1246 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1247 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1248 nfs4_stateid stateid;
1249 int ret = -EAGAIN;
1250
aac00a8d 1251 for (;;) {
dc0b027d 1252 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1253 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1254 if (can_open_cached(state, fmode, open_mode)) {
1255 update_open_stateflags(state, fmode);
6ee41268 1256 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1257 goto out_return_state;
1258 }
1259 spin_unlock(&state->owner->so_lock);
1260 }
34310430
TM		 1261 rcu_read_lock();
1262 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1263 if (!can_open_delegated(delegation, fmode)) {
34310430 1264 rcu_read_unlock();
aac00a8d 1265 break;
34310430 1266 }
aac00a8d 1267 /* Save the delegation */
f597c537 1268 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1269 rcu_read_unlock();
fa332941 1270 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1271 if (!opendata->is_recover) {
1272 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1273 if (ret != 0)
1274 goto out;
1275 }
aac00a8d 1276 ret = -EAGAIN;
34310430
TM		 1277
1278 /* Try to update the stateid using the delegation */
dc0b027d 1279 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1280 goto out_return_state;
aac00a8d 1281 }
aac00a8d
TM		 1282out:
1283 return ERR_PTR(ret);
1284out_return_state:
1285 atomic_inc(&state->count);
1286 return state;
1287}
1288
e23008ec
AA		 1289static void
1290nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1291{
1292 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1293 struct nfs_delegation *delegation;
1294 int delegation_flags = 0;
1295
1296 rcu_read_lock();
1297 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1298 if (delegation)
1299 delegation_flags = delegation->flags;
1300 rcu_read_unlock();
1301 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1302 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1303 "returning a delegation for "
1304 "OPEN(CLAIM_DELEGATE_CUR)\n",
1305 clp->cl_hostname);
1306 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1307 nfs_inode_set_delegation(state->inode,
1308 data->owner->so_cred,
1309 &data->o_res);
1310 else
1311 nfs_inode_reclaim_delegation(state->inode,
1312 data->owner->so_cred,
1313 &data->o_res);
1314}
1315
1316/*
1317 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1318 * and update the nfs4_state.
1319 */
1320static struct nfs4_state *
1321_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1322{
1323 struct inode *inode = data->state->inode;
1324 struct nfs4_state *state = data->state;
1325 int ret;
1326
d2bfda2e
WAA		 1327 if (!data->rpc_done) {
1328 if (data->rpc_status) {
1329 ret = data->rpc_status;
1330 goto err;
1331 }
1332 /* cached opens have already been processed */
1333 goto update;
e23008ec
AA		 1334 }
1335
e23008ec
AA		 1336 ret = nfs_refresh_inode(inode, &data->f_attr);
1337 if (ret)
1338 goto err;
1339
1340 if (data->o_res.delegation_type != 0)
1341 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1342update:
e23008ec
AA		 1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1344 data->o_arg.fmode);
d49f042a 1345 atomic_inc(&state->count);
e23008ec
AA		 1346
1347 return state;
1348err:
1349 return ERR_PTR(ret);
1350
1351}
1352
1353static struct nfs4_state *
1354_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1355{
1356 struct inode *inode;
1357 struct nfs4_state *state = NULL;
1b370bc2 1358 int ret;
24ac23ab 1359
aac00a8d 1360 if (!data->rpc_done) {
6ee41268 1361 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1362 goto out;
1363 }
1364
1b370bc2 1365 ret = -EAGAIN;
24ac23ab 1366 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1367 goto err;
1775fd3e 1368 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1369 ret = PTR_ERR(inode);
03f28e3a 1370 if (IS_ERR(inode))
1b370bc2
TM		 1371 goto err;
1372 ret = -ENOMEM;
24ac23ab
TM		 1373 state = nfs4_get_open_state(inode, data->owner);
1374 if (state == NULL)
1b370bc2 1375 goto err_put_inode;
e23008ec
AA		 1376 if (data->o_res.delegation_type != 0)
1377 nfs4_opendata_check_deleg(data, state);
34310430 1378 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1379 data->o_arg.fmode);
24ac23ab 1380 iput(inode);
aac00a8d 1381out:
7aa262b5 1382 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1383 return state;
1b370bc2
TM		 1384err_put_inode:
1385 iput(inode);
1386err:
1387 return ERR_PTR(ret);
24ac23ab
TM		 1388}
1389
e23008ec
AA		 1390static struct nfs4_state *
1391nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1392{
1393 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1394 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1395 return _nfs4_opendata_to_nfs4_state(data);
1396}
1397
864472e9
TM		 1398static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1399{
1400 struct nfs_inode *nfsi = NFS_I(state->inode);
1401 struct nfs_open_context *ctx;
1402
1403 spin_lock(&state->inode->i_lock);
1404 list_for_each_entry(ctx, &nfsi->open_files, list) {
1405 if (ctx->state != state)
1406 continue;
1407 get_nfs_open_context(ctx);
1408 spin_unlock(&state->inode->i_lock);
1409 return ctx;
1410 }
1411 spin_unlock(&state->inode->i_lock);
1412 return ERR_PTR(-ENOENT);
1413}
1414
4a1c0893
TM		 1415static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1416 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1417{
1418 struct nfs4_opendata *opendata;
1419
4a1c0893 1420 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1421 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1422 if (opendata == NULL)
1423 return ERR_PTR(-ENOMEM);
1424 opendata->state = state;
1425 atomic_inc(&state->count);
1426 return opendata;
1427}
1428
dc0b027d 1429static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1430{
2ced46c2 1431 struct nfs4_state *newstate;
864472e9
TM		 1432 int ret;
1433
dc0b027d
TM		 1434 opendata->o_arg.open_flags = 0;
1435 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1436 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1437 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1438 nfs4_init_opendata_res(opendata);
b257957e 1439 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1440 if (ret != 0)
1441 return ret;
2ced46c2 1442 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1443 if (IS_ERR(newstate))
1444 return PTR_ERR(newstate);
643168c2 1445 nfs4_close_state(newstate, fmode);
2ced46c2 1446 *res = newstate;
864472e9
TM		 1447 return 0;
1448}
1449
1450static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1451{
864472e9 1452 struct nfs4_state *newstate;
864472e9
TM		 1453 int ret;
1454
1455 /* memory barrier prior to reading state->n_* */
2ced46c2 1456 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1457 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1458 smp_rmb();
1459 if (state->n_rdwr != 0) {
b0ed9dbc 1460 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1461 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1462 if (ret != 0)
1463 return ret;
2ced46c2
TM		 1464 if (newstate != state)
1465 return -ESTALE;
864472e9
TM		 1466 }
1467 if (state->n_wronly != 0) {
b0ed9dbc 1468 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1469 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1470 if (ret != 0)
1471 return ret;
2ced46c2
TM		 1472 if (newstate != state)
1473 return -ESTALE;
864472e9
TM		 1474 }
1475 if (state->n_rdonly != 0) {
b0ed9dbc 1476 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1477 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1478 if (ret != 0)
1479 return ret;
2ced46c2
TM		 1480 if (newstate != state)
1481 return -ESTALE;
864472e9 1482 }
1ac7e2fd
TM		 1483 /*
1484 * We may have performed cached opens for all three recoveries.
1485 * Check if we need to update the current stateid.
1486 */
1487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1488 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1489 write_seqlock(&state->seqlock);
1ac7e2fd 1490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1491 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1492 write_sequnlock(&state->seqlock);
1ac7e2fd 1493 }
864472e9
TM		 1494 return 0;
1495}
1496
1da177e4
LT		 1497/*
1498 * OPEN_RECLAIM:
1499 * reclaim state on the server after a reboot.
1da177e4 1500 */
539cd03a 1501static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1502{
1ac7e2fd 1503 struct nfs_delegation *delegation;
864472e9 1504 struct nfs4_opendata *opendata;
dc0b027d 1505 fmode_t delegation_type = 0;
1da177e4
LT		 1506 int status;
1507
4a1c0893
TM		 1508 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1509 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1510 if (IS_ERR(opendata))
1511 return PTR_ERR(opendata);
1ac7e2fd
TM		 1512 rcu_read_lock();
1513 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1514 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1515 delegation_type = delegation->type;
1ac7e2fd 1516 rcu_read_unlock();
864472e9
TM		 1517 opendata->o_arg.u.delegation_type = delegation_type;
1518 status = nfs4_open_recover(opendata, state);
c6d00e63 1519 nfs4_opendata_put(opendata);
1da177e4
LT		 1520 return status;
1521}
1522
539cd03a 1523static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1524{
1525 struct nfs_server *server = NFS_SERVER(state->inode);
1526 struct nfs4_exception exception = { };
1527 int err;
1528 do {
539cd03a 1529 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1530 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1531 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1532 continue;
168667c4 1533 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1534 break;
1535 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1536 } while (exception.retry);
1537 return err;
1538}
1539
864472e9
TM		 1540static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1541{
1542 struct nfs_open_context *ctx;
1543 int ret;
1544
1545 ctx = nfs4_state_find_open_context(state);
1546 if (IS_ERR(ctx))
91876b13 1547 return -EAGAIN;
539cd03a 1548 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1549 put_nfs_open_context(ctx);
1550 return ret;
1551}
1552
db4f2e63 1553static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1554{
be76b5b6
TM		 1555 switch (err) {
1556 default:
1557 printk(KERN_ERR "NFS: %s: unhandled error "
1558 "%d.\n", __func__, err);
1559 case 0:
1560 case -ENOENT:
1561 case -ESTALE:
1562 break;
1563 case -NFS4ERR_BADSESSION:
1564 case -NFS4ERR_BADSLOT:
1565 case -NFS4ERR_BAD_HIGH_SLOT:
1566 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1567 case -NFS4ERR_DEADSESSION:
1568 set_bit(NFS_DELEGATED_STATE, &state->flags);
1569 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1570 return -EAGAIN;
1571 case -NFS4ERR_STALE_CLIENTID:
1572 case -NFS4ERR_STALE_STATEID:
1573 set_bit(NFS_DELEGATED_STATE, &state->flags);
1574 case -NFS4ERR_EXPIRED:
1575 /* Don't recall a delegation if it was lost */
1576 nfs4_schedule_lease_recovery(server->nfs_client);
1577 return -EAGAIN;
352297b9
CL		 1578 case -NFS4ERR_MOVED:
1579 nfs4_schedule_migration_recovery(server);
1580 return -EAGAIN;
8ef2f8d4
CL		 1581 case -NFS4ERR_LEASE_MOVED:
1582 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1583 return -EAGAIN;
be76b5b6
TM		 1584 case -NFS4ERR_DELEG_REVOKED:
1585 case -NFS4ERR_ADMIN_REVOKED:
1586 case -NFS4ERR_BAD_STATEID:
db4f2e63 1587 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1588 nfs_inode_find_state_and_recover(state->inode,
1589 stateid);
1590 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1591 return 0;
1592 case -NFS4ERR_DELAY:
1593 case -NFS4ERR_GRACE:
1594 set_bit(NFS_DELEGATED_STATE, &state->flags);
1595 ssleep(1);
1596 return -EAGAIN;
db4f2e63
TM		 1597 case -ENOMEM:
1598 case -NFS4ERR_DENIED:
1599 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1600 return 0;
be76b5b6 1601 }
1da177e4
LT		 1602 return err;
1603}
1604
db4f2e63
TM		 1605int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1606{
1607 struct nfs_server *server = NFS_SERVER(state->inode);
1608 struct nfs4_opendata *opendata;
1609 int err;
1610
1611 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1612 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1613 if (IS_ERR(opendata))
1614 return PTR_ERR(opendata);
1615 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1616 err = nfs4_open_recover(opendata, state);
1617 nfs4_opendata_put(opendata);
1618 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1619}
1620
be05c860
CL		 1621static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1622{
1623 struct nfs4_opendata *data = calldata;
1624
1625 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1626 &data->o_res.seq_res, task);
1627}
1628
cdd4e68b
TM		 1629static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1630{
1631 struct nfs4_opendata *data = calldata;
1632
be05c860
CL		 1633 nfs40_sequence_done(task, &data->o_res.seq_res);
1634
cdd4e68b 1635 data->rpc_status = task->tk_status;
26e976a8 1636 if (data->rpc_status == 0) {
f597c537 1637 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1638 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1639 renew_lease(data->o_res.server, data->timestamp);
3e309914 1640 data->rpc_done = 1;
26e976a8 1641 }
cdd4e68b
TM		 1642}
1643
1644static void nfs4_open_confirm_release(void *calldata)
1645{
1646 struct nfs4_opendata *data = calldata;
1647 struct nfs4_state *state = NULL;
1648
1649 /* If this request hasn't been cancelled, do nothing */
1650 if (data->cancelled == 0)
1651 goto out_free;
1652 /* In case of error, no cleanup! */
3e309914 1653 if (!data->rpc_done)
cdd4e68b 1654 goto out_free;
cdd4e68b 1655 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1656 if (!IS_ERR(state))
643168c2 1657 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1658out_free:
c6d00e63 1659 nfs4_opendata_put(data);
cdd4e68b
TM		 1660}
1661
1662static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1663 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1664 .rpc_call_done = nfs4_open_confirm_done,
1665 .rpc_release = nfs4_open_confirm_release,
1666};
1667
1668/*
1669 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1670 */
1671static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1672{
1673 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1674 struct rpc_task *task;
5138fde0
TM		 1675 struct rpc_message msg = {
1676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1677 .rpc_argp = &data->c_arg,
1678 .rpc_resp = &data->c_res,
1679 .rpc_cred = data->owner->so_cred,
1680 };
c970aa85
TM		 1681 struct rpc_task_setup task_setup_data = {
1682 .rpc_client = server->client,
5138fde0 1683 .rpc_message = &msg,
c970aa85
TM		 1684 .callback_ops = &nfs4_open_confirm_ops,
1685 .callback_data = data,
101070ca 1686 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1687 .flags = RPC_TASK_ASYNC,
1688 };
1da177e4
LT		 1689 int status;
1690
be05c860 1691 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1692 kref_get(&data->kref);
3e309914
TM		 1693 data->rpc_done = 0;
1694 data->rpc_status = 0;
5138fde0 1695 data->timestamp = jiffies;
c970aa85 1696 task = rpc_run_task(&task_setup_data);
7a1218a2 1697 if (IS_ERR(task))
cdd4e68b 1698 return PTR_ERR(task);
cdd4e68b
TM		 1699 status = nfs4_wait_for_completion_rpc_task(task);
1700 if (status != 0) {
1701 data->cancelled = 1;
1702 smp_wmb();
1703 } else
1704 status = data->rpc_status;
e6b3c4db 1705 rpc_put_task(task);
1da177e4
LT		 1706 return status;
1707}
1708
24ac23ab 1709static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1710{
24ac23ab
TM		 1711 struct nfs4_opendata *data = calldata;
1712 struct nfs4_state_owner *sp = data->owner;
549b19cc 1713 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1714
24ac23ab 1715 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1716 goto out_wait;
aac00a8d
TM		 1717 /*
1718 * Check if we still need to send an OPEN call, or if we can use
1719 * a delegation instead.
1720 */
1721 if (data->state != NULL) {
1722 struct nfs_delegation *delegation;
1723
dc0b027d 1724 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1725 goto out_no_action;
aac00a8d
TM		 1726 rcu_read_lock();
1727 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1728 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1729 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1730 can_open_delegated(delegation, data->o_arg.fmode))
1731 goto unlock_no_action;
aac00a8d
TM		 1732 rcu_read_unlock();
1733 }
95b72eb0 1734 /* Update client id. */
549b19cc 1735 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1736 switch (data->o_arg.claim) {
1737 case NFS4_OPEN_CLAIM_PREVIOUS:
1738 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1739 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1740 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1741 case NFS4_OPEN_CLAIM_FH:
1742 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1743 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1744 }
26e976a8 1745 data->timestamp = jiffies;
035168ab 1746 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1747 &data->o_arg.seq_args,
2240a9e2
TM		 1748 &data->o_res.seq_res,
1749 task) != 0)
1750 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1751
1752 /* Set the create mode (note dependency on the session type) */
1753 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1754 if (data->o_arg.open_flags & O_EXCL) {
1755 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1756 if (nfs4_has_persistent_session(clp))
1757 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1758 else if (clp->cl_mvops->minor_version > 0)
1759 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1760 }
6ee41268 1761 return;
652f89f6
TM		 1762unlock_no_action:
1763 rcu_read_unlock();
6ee41268
TM		 1764out_no_action:
1765 task->tk_action = NULL;
c8da19b9 1766out_wait:
b75ad4cd 1767 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1768}
1769
24ac23ab
TM		 1770static void nfs4_open_done(struct rpc_task *task, void *calldata)
1771{
1772 struct nfs4_opendata *data = calldata;
1da177e4 1773
24ac23ab 1774 data->rpc_status = task->tk_status;
d898528c 1775
14516c3a
TM		 1776 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1777 return;
d898528c 1778
24ac23ab 1779 if (task->tk_status == 0) {
807d66d8
TM		 1780 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1781 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1782 case S_IFREG:
1783 break;
1784 case S_IFLNK:
24ac23ab 1785 data->rpc_status = -ELOOP;
6f926b5b
TM		 1786 break;
1787 case S_IFDIR:
24ac23ab 1788 data->rpc_status = -EISDIR;
6f926b5b
TM		 1789 break;
1790 default:
24ac23ab 1791 data->rpc_status = -ENOTDIR;
807d66d8 1792 }
6f926b5b 1793 }
26e976a8 1794 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1795 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1796 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1797 }
3e309914 1798 data->rpc_done = 1;
24ac23ab 1799}
6f926b5b 1800
24ac23ab
TM		 1801static void nfs4_open_release(void *calldata)
1802{
1803 struct nfs4_opendata *data = calldata;
1804 struct nfs4_state *state = NULL;
1805
1806 /* If this request hasn't been cancelled, do nothing */
1807 if (data->cancelled == 0)
1808 goto out_free;
1809 /* In case of error, no cleanup! */
3e309914 1810 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1811 goto out_free;
1812 /* In case we need an open_confirm, no cleanup! */
1813 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1814 goto out_free;
24ac23ab 1815 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1816 if (!IS_ERR(state))
643168c2 1817 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1818out_free:
c6d00e63 1819 nfs4_opendata_put(data);
24ac23ab
TM		 1820}
1821
1822static const struct rpc_call_ops nfs4_open_ops = {
1823 .rpc_call_prepare = nfs4_open_prepare,
1824 .rpc_call_done = nfs4_open_done,
1825 .rpc_release = nfs4_open_release,
1826};
1827
b257957e 1828static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1829{
1830 struct inode *dir = data->dir->d_inode;
1831 struct nfs_server *server = NFS_SERVER(dir);
1832 struct nfs_openargs *o_arg = &data->o_arg;
1833 struct nfs_openres *o_res = &data->o_res;
1834 struct rpc_task *task;
5138fde0
TM		 1835 struct rpc_message msg = {
1836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1837 .rpc_argp = o_arg,
1838 .rpc_resp = o_res,
1839 .rpc_cred = data->owner->so_cred,
1840 };
c970aa85
TM		 1841 struct rpc_task_setup task_setup_data = {
1842 .rpc_client = server->client,
5138fde0 1843 .rpc_message = &msg,
c970aa85
TM		 1844 .callback_ops = &nfs4_open_ops,
1845 .callback_data = data,
101070ca 1846 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1847 .flags = RPC_TASK_ASYNC,
1848 };
24ac23ab
TM		 1849 int status;
1850
a9c92d6b 1851 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1852 kref_get(&data->kref);
3e309914
TM		 1853 data->rpc_done = 0;
1854 data->rpc_status = 0;
2ced46c2 1855 data->cancelled = 0;
bdeca1b7
TM		 1856 data->is_recover = 0;
1857 if (isrecover) {
8fe72bac 1858 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1859 data->is_recover = 1;
1860 }
c970aa85 1861 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1862 if (IS_ERR(task))
1863 return PTR_ERR(task);
1864 status = nfs4_wait_for_completion_rpc_task(task);
1865 if (status != 0) {
1866 data->cancelled = 1;
1867 smp_wmb();
1868 } else
1869 status = data->rpc_status;
1870 rpc_put_task(task);
1871
1872 return status;
1873}
1874
1875static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1876{
1877 struct inode *dir = data->dir->d_inode;
1878 struct nfs_openres *o_res = &data->o_res;
1879 int status;
1880
1881 status = nfs4_run_open_task(data, 1);
1882 if (status != 0 || !data->rpc_done)
1883 return status;
1884
6926afd1
TM		 1885 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1886
b257957e
AB		 1887 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1888 status = _nfs4_proc_open_confirm(data);
1889 if (status != 0)
1890 return status;
1891 }
1892
1893 return status;
1894}
1895
6168f62c
WAA		 1896static int nfs4_opendata_access(struct rpc_cred *cred,
1897 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1898 struct nfs4_state *state, fmode_t fmode,
1899 int openflags)
6168f62c
WAA		 1900{
1901 struct nfs_access_entry cache;
1902 u32 mask;
1903
1904 /* access call failed or for some reason the server doesn't
1905 * support any access modes -- defer access call until later */
1906 if (opendata->o_res.access_supported == 0)
1907 return 0;
1908
1909 mask = 0;
bbd3a8ee 1910 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1911 * write mode bits, but POSIX allows the creating process to write.
1912 * use openflags to check for exec, because fmode won't
1913 * always have FMODE_EXEC set when file open for exec. */
1914 if (openflags & __FMODE_EXEC) {
1915 /* ONLY check for exec rights */
1916 mask = MAY_EXEC;
1917 } else if (fmode & FMODE_READ)
1918 mask = MAY_READ;
6168f62c
WAA		 1919
1920 cache.cred = cred;
1921 cache.jiffies = jiffies;
1922 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1923 nfs_access_add_cache(state->inode, &cache);
1924
bbd3a8ee 1925 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1926 return 0;
1927
1928 /* even though OPEN succeeded, access is denied. Close the file */
1929 nfs4_close_state(state, fmode);
998f40b5 1930 return -EACCES;
6168f62c
WAA		 1931}
1932
b257957e
AB		 1933/*
1934 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1935 */
1936static int _nfs4_proc_open(struct nfs4_opendata *data)
1937{
1938 struct inode *dir = data->dir->d_inode;
1939 struct nfs_server *server = NFS_SERVER(dir);
1940 struct nfs_openargs *o_arg = &data->o_arg;
1941 struct nfs_openres *o_res = &data->o_res;
1942 int status;
1943
1944 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1945 if (!data->rpc_done)
1946 return status;
1947 if (status != 0) {
1948 if (status == -NFS4ERR_BADNAME &&
1949 !(o_arg->open_flags & O_CREAT))
1950 return -ENOENT;
24ac23ab 1951 return status;
08ef7bd3 1952 }
24ac23ab 1953
6926afd1
TM		 1954 nfs_fattr_map_and_free_names(server, &data->f_attr);
1955
5bc2afc2 1956 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1957 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1958 if (o_arg->open_flags & O_EXCL)
1959 data->file_created = 1;
1960 else if (o_res->cinfo.before != o_res->cinfo.after)
1961 data->file_created = 1;
1962 }
0df5dd4a
TM		 1963 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1964 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1965 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1966 status = _nfs4_proc_open_confirm(data);
1da177e4 1967 if (status != 0)
24ac23ab 1968 return status;
1da177e4
LT		 1969 }
1970 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1971 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1972 return 0;
1da177e4
LT		 1973}
1974
d83217c1
AA		 1975static int nfs4_recover_expired_lease(struct nfs_server *server)
1976{
1977 return nfs4_client_recover_expired_lease(server->nfs_client);
1978}
1979
1da177e4
LT		 1980/*
1981 * OPEN_EXPIRED:
1982 * reclaim state on the server after a network partition.
1983 * Assumes caller holds the appropriate lock
1984 */
539cd03a 1985static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1986{
e56e0b78 1987 struct nfs4_opendata *opendata;
864472e9 1988 int ret;
1da177e4 1989
4a1c0893 1990 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1991 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1992 if (IS_ERR(opendata))
1993 return PTR_ERR(opendata);
864472e9 1994 ret = nfs4_open_recover(opendata, state);
35d05778 1995 if (ret == -ESTALE)
3d4ff43d 1996 d_drop(ctx->dentry);
c6d00e63 1997 nfs4_opendata_put(opendata);
864472e9 1998 return ret;
1da177e4
LT		 1999}
2000
a9ed2e25 2001static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2002{
539cd03a 2003 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2004 struct nfs4_exception exception = { };
2005 int err;
2006
2007 do {
539cd03a 2008 err = _nfs4_open_expired(ctx, state);
42113a75 2009 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2010 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2011 continue;
a9ed2e25
TM		 2012 switch (err) {
2013 default:
2014 goto out;
2015 case -NFS4ERR_GRACE:
2016 case -NFS4ERR_DELAY:
2017 nfs4_handle_exception(server, err, &exception);
2018 err = 0;
2019 }
202b50dc 2020 } while (exception.retry);
a9ed2e25 2021out:
202b50dc
TM		 2022 return err;
2023}
2024
1da177e4
LT		 2025static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2026{
1da177e4 2027 struct nfs_open_context *ctx;
864472e9 2028 int ret;
1da177e4 2029
864472e9
TM		 2030 ctx = nfs4_state_find_open_context(state);
2031 if (IS_ERR(ctx))
91876b13 2032 return -EAGAIN;
539cd03a 2033 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2034 put_nfs_open_context(ctx);
2035 return ret;
1da177e4
LT		 2036}
2037
f062eb6c 2038#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2039static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2040{
f062eb6c 2041 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2042 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2043 struct nfs_delegation *delegation;
2044 struct rpc_cred *cred = NULL;
2045 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2046
2047 /* If a state reset has been done, test_stateid is unneeded */
2048 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2049 return;
2050
ab7cb0df
TM		 2051 /* Get the delegation credential for use by test/free_stateid */
2052 rcu_read_lock();
2053 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2054 if (delegation != NULL &&
2055 nfs4_stateid_match(&delegation->stateid, stateid)) {
2056 cred = get_rpccred(delegation->cred);
2057 rcu_read_unlock();
2058 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2059 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2060 } else
2061 rcu_read_unlock();
2062
3e60ffdd
CL		 2063 if (status != NFS_OK) {
2064 /* Free the stateid unless the server explicitly
2065 * informs us the stateid is unrecognized. */
2066 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2067 nfs41_free_stateid(server, stateid, cred);
6938867e 2068 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2069
6938867e
BS		 2070 write_seqlock(&state->seqlock);
2071 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2072 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2073 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2074 }
ab7cb0df
TM		 2075
2076 if (cred != NULL)
2077 put_rpccred(cred);
3e60ffdd
CL		 2078}
2079
2080/**
2081 * nfs41_check_open_stateid - possibly free an open stateid
2082 *
2083 * @state: NFSv4 state for an inode
2084 *
2085 * Returns NFS_OK if recovery for this stateid is now finished.
2086 * Otherwise a negative NFS4ERR value is returned.
2087 */
2088static int nfs41_check_open_stateid(struct nfs4_state *state)
2089{
2090 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2091 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2092 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2093 int status;
2094
2095 /* If a state reset has been done, test_stateid is unneeded */
2096 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2097 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2098 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2099 return -NFS4ERR_BAD_STATEID;
2100
ab7cb0df 2101 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2102 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2103 if (status != NFS_OK) {
2104 /* Free the stateid unless the server explicitly
2105 * informs us the stateid is unrecognized. */
2106 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2107 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2108
2109 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2110 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2111 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2112 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2113 }
2114 return status;
2115}
2116
2117static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2118{
eb64cf96 2119 int status;
b01dd1d8 2120
3e60ffdd
CL		 2121 nfs41_clear_delegation_stateid(state);
2122 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2123 if (status != NFS_OK)
2124 status = nfs4_open_expired(sp, state);
2125 return status;
f062eb6c
BS		 2126}
2127#endif
2128
aa53ed54
JL		 2129/*
2130 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2131 * fields corresponding to attributes that were used to store the verifier.
2132 * Make sure we clobber those fields in the later setattr call
2133 */
2134static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2135{
2136 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2137 !(sattr->ia_valid & ATTR_ATIME_SET))
2138 sattr->ia_valid |= ATTR_ATIME;
2139
2140 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2141 !(sattr->ia_valid & ATTR_MTIME_SET))
2142 sattr->ia_valid |= ATTR_MTIME;
2143}
2144
c21443c2
TM		 2145static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2146 fmode_t fmode,
2147 int flags,
3efb9722 2148 struct nfs_open_context *ctx)
c21443c2
TM		 2149{
2150 struct nfs4_state_owner *sp = opendata->owner;
2151 struct nfs_server *server = sp->so_server;
275bb307 2152 struct dentry *dentry;
c21443c2
TM		 2153 struct nfs4_state *state;
2154 unsigned int seq;
2155 int ret;
2156
2157 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2158
2159 ret = _nfs4_proc_open(opendata);
2160 if (ret != 0)
2161 goto out;
2162
2163 state = nfs4_opendata_to_nfs4_state(opendata);
2164 ret = PTR_ERR(state);
2165 if (IS_ERR(state))
2166 goto out;
2167 if (server->caps & NFS_CAP_POSIX_LOCK)
2168 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2169
275bb307
TM		 2170 dentry = opendata->dentry;
2171 if (dentry->d_inode == NULL) {
2172 /* FIXME: Is this d_drop() ever needed? */
2173 d_drop(dentry);
2174 dentry = d_add_unique(dentry, igrab(state->inode));
2175 if (dentry == NULL) {
2176 dentry = opendata->dentry;
2177 } else if (dentry != ctx->dentry) {
2178 dput(ctx->dentry);
2179 ctx->dentry = dget(dentry);
2180 }
2181 nfs_set_verifier(dentry,
2182 nfs_save_change_attribute(opendata->dir->d_inode));
2183 }
2184
c21443c2
TM		 2185 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2186 if (ret != 0)
2187 goto out;
2188
3efb9722 2189 ctx->state = state;
c45ffdd2
TM		 2190 if (dentry->d_inode == state->inode) {
2191 nfs_inode_attach_open_context(ctx);
2192 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2193 nfs4_schedule_stateid_recovery(server, state);
2194 }
c21443c2
TM		 2195out:
2196 return ret;
2197}
2198
1da177e4 2199/*
24ac23ab 2200 * Returns a referenced nfs4_state
1da177e4 2201 */
82be417a 2202static int _nfs4_do_open(struct inode *dir,
4197a055 2203 struct nfs_open_context *ctx,
82be417a
AA		 2204 int flags,
2205 struct iattr *sattr,
5bc2afc2
TM		 2206 struct nfs4_label *label,
2207 int *opened)
1da177e4
LT		 2208{
2209 struct nfs4_state_owner *sp;
2210 struct nfs4_state *state = NULL;
2211 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2212 struct nfs4_opendata *opendata;
4197a055
TM		 2213 struct dentry *dentry = ctx->dentry;
2214 struct rpc_cred *cred = ctx->cred;
2215 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2216 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2217 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2218 struct nfs4_label *olabel = NULL;
aac00a8d 2219 int status;
1da177e4
LT		 2220
2221 /* Protect against reboot recovery conflicts */
1da177e4 2222 status = -ENOMEM;
d1e284d5
TM		 2223 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2224 if (sp == NULL) {
1da177e4
LT		 2225 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2226 goto out_err;
2227 }
58d9714a
TM		 2228 status = nfs4_recover_expired_lease(server);
2229 if (status != 0)
b4454fe1 2230 goto err_put_state_owner;
82a2c1b7
AV		 2231 if (dentry->d_inode != NULL)
2232 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2233 status = -ENOMEM;
49f9a0fa
TM		 2234 if (dentry->d_inode)
2235 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2236 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2237 label, claim, GFP_KERNEL);
e56e0b78 2238 if (opendata == NULL)
95d35cb4 2239 goto err_put_state_owner;
1da177e4 2240
14c43f76
DQ		 2241 if (label) {
2242 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2243 if (IS_ERR(olabel)) {
2244 status = PTR_ERR(olabel);
2245 goto err_opendata_put;
2246 }
2247 }
2248
82be417a
AA		 2249 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2250 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2251 if (!opendata->f_attr.mdsthreshold)
14c43f76 2252 goto err_free_label;
1549210f 2253 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2254 }
82a2c1b7
AV		 2255 if (dentry->d_inode != NULL)
2256 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2257
3efb9722 2258 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2259 if (status != 0)
14c43f76 2260 goto err_free_label;
3efb9722 2261 state = ctx->state;
6168f62c 2262
549b19cc
TM		 2263 if ((opendata->o_arg.open_flags & O_EXCL) &&
2264 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2265 nfs4_exclusive_attrset(opendata, sattr);
2266
2267 nfs_fattr_init(opendata->o_res.f_attr);
2268 status = nfs4_do_setattr(state->inode, cred,
2269 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2270 state, label, olabel);
2271 if (status == 0) {
0ab64e0e 2272 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2273 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2274 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2275 }
0ab64e0e 2276 }
5bc2afc2
TM		 2277 if (opendata->file_created)
2278 *opened |= FILE_CREATED;
82be417a
AA		 2279
2280 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2281 *ctx_th = opendata->f_attr.mdsthreshold;
2282 else
2283 kfree(opendata->f_attr.mdsthreshold);
2284 opendata->f_attr.mdsthreshold = NULL;
2285
14c43f76
DQ		 2286 nfs4_label_free(olabel);
2287
c6d00e63 2288 nfs4_opendata_put(opendata);
1da177e4 2289 nfs4_put_state_owner(sp);
1da177e4 2290 return 0;
14c43f76
DQ		 2291err_free_label:
2292 nfs4_label_free(olabel);
c6d00e63 2293err_opendata_put:
82be417a 2294 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2295 nfs4_opendata_put(opendata);
e56e0b78
TM		 2296err_put_state_owner:
2297 nfs4_put_state_owner(sp);
1da177e4 2298out_err:
1da177e4
LT		 2299 return status;
2300}
2301
2302
82be417a 2303static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2304 struct nfs_open_context *ctx,
82be417a
AA		 2305 int flags,
2306 struct iattr *sattr,
5bc2afc2
TM		 2307 struct nfs4_label *label,
2308 int *opened)
1da177e4 2309{
49f9a0fa 2310 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2311 struct nfs4_exception exception = { };
2312 struct nfs4_state *res;
2313 int status;
2314
2315 do {
5bc2afc2 2316 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2317 res = ctx->state;
42113a75 2318 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2319 if (status == 0)
2320 break;
2321 /* NOTE: BAD_SEQID means the server and client disagree about the
2322 * book-keeping w.r.t. state-changing operations
2323 * (OPEN/CLOSE/LOCK/LOCKU...)
2324 * It is actually a sign of a bug on the client or on the server.
2325 *
2326 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2327 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2328 * have unhashed the old state_owner for us, and that we can
2329 * therefore safely retry using a new one. We should still warn
2330 * the user though...
2331 */
2332 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2333 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2334 " returned a bad sequence-id error!\n",
2335 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2336 exception.retry = 1;
2337 continue;
2338 }
550f5747
TM		 2339 /*
2340 * BAD_STATEID on OPEN means that the server cancelled our
2341 * state before it received the OPEN_CONFIRM.
2342 * Recover by retrying the request as per the discussion
2343 * on Page 181 of RFC3530.
2344 */
2345 if (status == -NFS4ERR_BAD_STATEID) {
2346 exception.retry = 1;
2347 continue;
2348 }
aac00a8d
TM		 2349 if (status == -EAGAIN) {
2350 /* We must have found a delegation */
2351 exception.retry = 1;
2352 continue;
2353 }
49f9a0fa
TM		 2354 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2355 continue;
2356 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2357 status, &exception));
2358 } while (exception.retry);
2359 return res;
2360}
2361
659bfcd6
TM		 2362static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2363 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2364 struct nfs4_state *state, struct nfs4_label *ilabel,
2365 struct nfs4_label *olabel)
1da177e4 2366{
3e4f6290 2367 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2368 struct nfs_setattrargs arg = {
3e4f6290 2369 .fh = NFS_FH(inode),
1da177e4
LT		 2370 .iap = sattr,
2371 .server = server,
2372 .bitmask = server->attr_bitmask,
1775fd3e 2373 .label = ilabel,
1da177e4
LT		 2374 };
2375 struct nfs_setattrres res = {
2376 .fattr = fattr,
1775fd3e 2377 .label = olabel,
1da177e4
LT		 2378 .server = server,
2379 };
2380 struct rpc_message msg = {
659bfcd6
TM		 2381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2382 .rpc_argp = &arg,
2383 .rpc_resp = &res,
2384 .rpc_cred = cred,
1da177e4 2385 };
26e976a8 2386 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2387 fmode_t fmode;
2388 bool truncate;
65e4308d 2389 int status;
1da177e4 2390
aa9c2669
DQ		 2391 arg.bitmask = nfs4_bitmask(server, ilabel);
2392 if (ilabel)
2393 arg.bitmask = nfs4_bitmask(server, olabel);
2394
0e574af1 2395 nfs_fattr_init(fattr);
1da177e4 2396
ee3ae84e
TM		 2397 /* Servers should only apply open mode checks for file size changes */
2398 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2399 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2400
2401 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2402 /* Use that stateid */
2403 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2404 struct nfs_lockowner lockowner = {
2405 .l_owner = current->files,
2406 .l_pid = current->tgid,
2407 };
4fc8796d 2408 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2409 &lockowner);
08e9eac4 2410 } else
f597c537 2411 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2412
7c513058 2413 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2414 if (status == 0 && state != NULL)
2415 renew_lease(server, timestamp);
65e4308d 2416 return status;
1da177e4
LT		 2417}
2418
659bfcd6
TM		 2419static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2420 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2421 struct nfs4_state *state, struct nfs4_label *ilabel,
2422 struct nfs4_label *olabel)
1da177e4 2423{
3e4f6290 2424 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2425 struct nfs4_exception exception = {
2426 .state = state,
3114ea7a 2427 .inode = inode,
a1d0b5ee 2428 };
1da177e4
LT		 2429 int err;
2430 do {
1775fd3e 2431 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2432 trace_nfs4_setattr(inode, err);
451146be
TM		 2433 switch (err) {
2434 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2435 if (!(sattr->ia_valid & ATTR_SIZE)) {
2436 pr_warn_once("NFSv4: server %s is incorrectly "
2437 "applying open mode checks to "
2438 "a SETATTR that is not "
2439 "changing file size.\n",
2440 server->nfs_client->cl_hostname);
2441 }
451146be
TM		 2442 if (state && !(state->state & FMODE_WRITE)) {
2443 err = -EBADF;
2444 if (sattr->ia_valid & ATTR_OPEN)
2445 err = -EACCES;
2446 goto out;
2447 }
2448 }
2449 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2450 } while (exception.retry);
451146be 2451out:
1da177e4
LT		 2452 return err;
2453}
2454
2455struct nfs4_closedata {
2456 struct inode *inode;
2457 struct nfs4_state *state;
2458 struct nfs_closeargs arg;
2459 struct nfs_closeres res;
516a6af6 2460 struct nfs_fattr fattr;
26e976a8 2461 unsigned long timestamp;
f7e8917a
FI		 2462 bool roc;
2463 u32 roc_barrier;
1da177e4
LT		 2464};
2465
963d8fe5 2466static void nfs4_free_closedata(void *data)
9512135d 2467{
963d8fe5
TM		 2468 struct nfs4_closedata *calldata = data;
2469 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2470 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2471
f7e8917a
FI		 2472 if (calldata->roc)
2473 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2474 nfs4_put_open_state(calldata->state);
2475 nfs_free_seqid(calldata->arg.seqid);
9512135d 2476 nfs4_put_state_owner(sp);
322b2b90 2477 nfs_sb_deactive(sb);
9512135d
TM		 2478 kfree(calldata);
2479}
2480
88069f77
TM		 2481static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2482 fmode_t fmode)
2483{
2484 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2485 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2486 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2487 case FMODE_WRITE:
88069f77 2488 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2489 break;
2490 case FMODE_READ:
88069f77 2491 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2492 break;
2493 case 0:
2494 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2495 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2496 clear_bit(NFS_OPEN_STATE, &state->flags);
2497 }
88069f77
TM		 2498 spin_unlock(&state->owner->so_lock);
2499}
2500
963d8fe5 2501static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2502{
963d8fe5 2503 struct nfs4_closedata *calldata = data;
1da177e4 2504 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2505 struct nfs_server *server = NFS_SERVER(calldata->inode);
2506
a3ca5651 2507 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2508 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2509 return;
42113a75 2510 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2511 /* hmm. we are done with the inode, and in the process of freeing
2512 * the state_owner. we keep this around to process errors
2513 */
1da177e4
LT		 2514 switch (task->tk_status) {
2515 case 0:
f7e8917a
FI		 2516 if (calldata->roc)
2517 pnfs_roc_set_barrier(state->inode,
2518 calldata->roc_barrier);
45328c35 2519 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2520 renew_lease(server, calldata->timestamp);
1da177e4 2521 break;
69794ad7 2522 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2523 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2524 case -NFS4ERR_OLD_STATEID:
2525 case -NFS4ERR_BAD_STATEID:
1da177e4 2526 case -NFS4ERR_EXPIRED:
dc0b027d 2527 if (calldata->arg.fmode == 0)
9e33bed5 2528 break;
1da177e4 2529 default:
69794ad7 2530 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2531 rpc_restart_call_prepare(task);
69794ad7
TM		 2532 goto out_release;
2533 }
1da177e4 2534 }
69794ad7
TM		 2535 nfs4_close_clear_stateid_flags(state, calldata->arg.fmode);
2536out_release:
72211dbe 2537 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2538 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2539 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2540}
2541
4ce70ada 2542static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2543{
4ce70ada 2544 struct nfs4_closedata *calldata = data;
9512135d 2545 struct nfs4_state *state = calldata->state;
7fdab069 2546 struct inode *inode = calldata->inode;
88069f77 2547 int call_close = 0;
9512135d 2548
a3ca5651 2549 dprintk("%s: begin!\n", __func__);
963d8fe5 2550 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2551 goto out_wait;
003707c7 2552
88069f77
TM		 2553 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2554 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2555 spin_lock(&state->owner->so_lock);
003707c7 2556 /* Calculate the change in open mode */
e7616923 2557 if (state->n_rdwr == 0) {
003707c7 2558 if (state->n_rdonly == 0) {
88069f77
TM		 2559 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2560 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2561 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2562 }
2563 if (state->n_wronly == 0) {
88069f77
TM		 2564 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2565 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2566 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2567 }
e7616923 2568 }
5d422301
TM		 2569 if (!nfs4_valid_open_stateid(state))
2570 call_close = 0;
4cecb76f 2571 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2572
2573 if (!call_close) {
963d8fe5 2574 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2575 goto out_no_action;
9512135d 2576 }
88069f77 2577
f7e8917a 2578 if (calldata->arg.fmode == 0) {
88069f77 2579 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2580 if (calldata->roc &&
b9536ad5
AA		 2581 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2582 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2583 goto out_wait;
b9536ad5 2584 }
f7e8917a 2585 }
88069f77 2586
516a6af6 2587 nfs_fattr_init(calldata->res.fattr);
26e976a8 2588 calldata->timestamp = jiffies;
7fdab069 2589 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2590 &calldata->arg.seq_args,
2591 &calldata->res.seq_res,
2240a9e2
TM		 2592 task) != 0)
2593 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2594 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2595 return;
2596out_no_action:
2597 task->tk_action = NULL;
2598out_wait:
2599 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2600}
2601
963d8fe5 2602static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2603 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2604 .rpc_call_done = nfs4_close_done,
2605 .rpc_release = nfs4_free_closedata,
2606};
2607
1da177e4
LT		 2608/*
2609 * It is possible for data to be read/written from a mem-mapped file
2610 * after the sys_close call (which hits the vfs layer as a flush).
2611 * This means that we can't safely call nfsv4 close on a file until
2612 * the inode is cleared. This in turn means that we are not good
2613 * NFSv4 citizens - we do not indicate to the server to update the file's
2614 * share state even when we are done with one of the three share
2615 * stateid's in the inode.
2616 *
2617 * NOTE: Caller must be holding the sp->so_owner semaphore!
2618 */
1f7977c1 2619int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2620{
4a35bd41 2621 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2622 struct nfs4_closedata *calldata;
b39e625b
TM		 2623 struct nfs4_state_owner *sp = state->owner;
2624 struct rpc_task *task;
5138fde0
TM		 2625 struct rpc_message msg = {
2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2627 .rpc_cred = state->owner->so_cred,
2628 };
c970aa85
TM		 2629 struct rpc_task_setup task_setup_data = {
2630 .rpc_client = server->client,
5138fde0 2631 .rpc_message = &msg,
c970aa85 2632 .callback_ops = &nfs4_close_ops,
101070ca 2633 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2634 .flags = RPC_TASK_ASYNC,
2635 };
9512135d 2636 int status = -ENOMEM;
1da177e4 2637
fa940720
WAA		 2638 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2639 &task_setup_data.rpc_client, &msg);
2640
8535b2be 2641 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2642 if (calldata == NULL)
9512135d 2643 goto out;
a9c92d6b 2644 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2645 calldata->inode = state->inode;
1da177e4 2646 calldata->state = state;
4a35bd41 2647 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2648 calldata->arg.stateid = &state->open_stateid;
1da177e4 2649 /* Serialization for the sequence id */
8535b2be 2650 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2651 if (calldata->arg.seqid == NULL)
2652 goto out_free_calldata;
dc0b027d 2653 calldata->arg.fmode = 0;
a65318bf 2654 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2655 calldata->res.fattr = &calldata->fattr;
c1d51931 2656 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2657 calldata->res.server = server;
1f7977c1 2658 calldata->roc = pnfs_roc(state->inode);
643168c2 2659 nfs_sb_active(calldata->inode->i_sb);
9512135d 2660
1174dd1f
TM		 2661 msg.rpc_argp = &calldata->arg;
2662 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2663 task_setup_data.callback_data = calldata;
2664 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2665 if (IS_ERR(task))
2666 return PTR_ERR(task);
a49c3c77
TM		 2667 status = 0;
2668 if (wait)
2669 status = rpc_wait_for_completion_task(task);
b39e625b 2670 rpc_put_task(task);
a49c3c77 2671 return status;
9512135d
TM		 2672out_free_calldata:
2673 kfree(calldata);
2674out:
b39e625b
TM		 2675 nfs4_put_open_state(state);
2676 nfs4_put_state_owner(sp);
9512135d 2677 return status;
1da177e4
LT		 2678}
2679
2b484297 2680static struct inode *
5bc2afc2
TM		 2681nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2682 int open_flags, struct iattr *attr, int *opened)
1da177e4 2683{
1da177e4 2684 struct nfs4_state *state;
aa9c2669
DQ		 2685 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2686
2687 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2688
565277f6 2689 /* Protect against concurrent sillydeletes */
5bc2afc2 2690 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2691
2692 nfs4_label_release_security(label);
2693
f46e0bd3
TM		 2694 if (IS_ERR(state))
2695 return ERR_CAST(state);
275bb307 2696 return state->inode;
1da177e4
LT		 2697}
2698
1185a552 2699static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2700{
2701 if (ctx->state == NULL)
2702 return;
2703 if (is_sync)
643168c2 2704 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2705 else
643168c2 2706 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2707}
1da177e4 2708
b944dba3
TM		 2709#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2710#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
2711#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_CHANGE_SECURITY_LABEL - 1UL)
2712
1da177e4
LT		 2713static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2714{
43652ad5
BH		 2715 struct nfs4_server_caps_arg args = {
2716 .fhandle = fhandle,
2717 };
1da177e4
LT		 2718 struct nfs4_server_caps_res res = {};
2719 struct rpc_message msg = {
2720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2721 .rpc_argp = &args,
1da177e4
LT		 2722 .rpc_resp = &res,
2723 };
2724 int status;
2725
7c513058 2726 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2727 if (status == 0) {
b944dba3
TM		 2728 /* Sanity check the server answers */
2729 switch (server->nfs_client->cl_minorversion) {
2730 case 0:
2731 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2732 res.attr_bitmask[2] = 0;
2733 break;
2734 case 1:
2735 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2736 break;
2737 case 2:
2738 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2739 }
1da177e4 2740 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2741 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2742 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2743 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2744 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2745 NFS_CAP_CTIME|NFS_CAP_MTIME|
2746 NFS_CAP_SECURITY_LABEL);
1da177e4
LT		 2747 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2748 server->caps |= NFS_CAP_ACLS;
2749 if (res.has_links != 0)
2750 server->caps |= NFS_CAP_HARDLINKS;
2751 if (res.has_symlinks != 0)
2752 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2753 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2754 server->caps |= NFS_CAP_FILEID;
2755 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2756 server->caps |= NFS_CAP_MODE;
2757 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2758 server->caps |= NFS_CAP_NLINK;
2759 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2760 server->caps |= NFS_CAP_OWNER;
2761 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2762 server->caps |= NFS_CAP_OWNER_GROUP;
2763 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2764 server->caps |= NFS_CAP_ATIME;
2765 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2766 server->caps |= NFS_CAP_CTIME;
2767 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2768 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2769#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2770 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2771 server->caps |= NFS_CAP_SECURITY_LABEL;
2772#endif
2773 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2774 sizeof(server->attr_bitmask));
b944dba3 2775 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2776
a65318bf
TM		 2777 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2778 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2779 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2780 server->cache_consistency_bitmask[2] = 0;
1da177e4 2781 server->acl_bitmask = res.acl_bitmask;
264e6351 2782 server->fh_expire_type = res.fh_expire_type;
1da177e4 2783 }
cccef3b9 2784
1da177e4
LT		 2785 return status;
2786}
2787
55a97593 2788int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2789{
2790 struct nfs4_exception exception = { };
2791 int err;
2792 do {
2793 err = nfs4_handle_exception(server,
2794 _nfs4_server_capabilities(server, fhandle),
2795 &exception);
2796 } while (exception.retry);
2797 return err;
2798}
2799
2800static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2801 struct nfs_fsinfo *info)
2802{
aa9c2669 2803 u32 bitmask[3];
1da177e4 2804 struct nfs4_lookup_root_arg args = {
aa9c2669 2805 .bitmask = bitmask,
1da177e4
LT		 2806 };
2807 struct nfs4_lookup_res res = {
2808 .server = server,
0e574af1 2809 .fattr = info->fattr,
1da177e4
LT		 2810 .fh = fhandle,
2811 };
2812 struct rpc_message msg = {
2813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2814 .rpc_argp = &args,
2815 .rpc_resp = &res,
2816 };
008f55d0 2817
aa9c2669
DQ		 2818 bitmask[0] = nfs4_fattr_bitmap[0];
2819 bitmask[1] = nfs4_fattr_bitmap[1];
2820 /*
2821 * Process the label in the upcoming getfattr
2822 */
2823 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2824
0e574af1 2825 nfs_fattr_init(info->fattr);
7c513058 2826 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2827}
2828
2829static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2830 struct nfs_fsinfo *info)
2831{
2832 struct nfs4_exception exception = { };
2833 int err;
2834 do {
fb8a5ba8 2835 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2836 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2837 switch (err) {
2838 case 0:
2839 case -NFS4ERR_WRONGSEC:
05e9cfb4 2840 goto out;
fb8a5ba8
BS		 2841 default:
2842 err = nfs4_handle_exception(server, err, &exception);
2843 }
1da177e4 2844 } while (exception.retry);
05e9cfb4 2845out:
1da177e4
LT		 2846 return err;
2847}
2848
8f70e95f
BS		 2849static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2850 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2851{
c2190661
TM		 2852 struct rpc_auth_create_args auth_args = {
2853 .pseudoflavor = flavor,
2854 };
8f70e95f
BS		 2855 struct rpc_auth *auth;
2856 int ret;
2857
c2190661 2858 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2859 if (IS_ERR(auth)) {
75bc8821 2860 ret = -EACCES;
8f70e95f
BS		 2861 goto out;
2862 }
2863 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2864out:
2865 return ret;
2866}
2867
9a744ba3
CL		 2868/*
2869 * Retry pseudoroot lookup with various security flavors. We do this when:
2870 *
2871 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2872 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2873 *
2874 * Returns zero on success, or a negative NFS4ERR value, or a
2875 * negative errno value.
2876 */
801a16dc 2877static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2878 struct nfs_fsinfo *info)
1da177e4 2879{
9a744ba3
CL		 2880 /* Per 3530bis 15.33.5 */
2881 static const rpc_authflavor_t flav_array[] = {
2882 RPC_AUTH_GSS_KRB5P,
2883 RPC_AUTH_GSS_KRB5I,
2884 RPC_AUTH_GSS_KRB5,
c4eafe11 2885 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2886 RPC_AUTH_NULL,
2887 };
2888 int status = -EPERM;
2889 size_t i;
6a1a1e34 2890
4d4b69dd
WAA		 2891 if (server->auth_info.flavor_len > 0) {
2892 /* try each flavor specified by user */
2893 for (i = 0; i < server->auth_info.flavor_len; i++) {
2894 status = nfs4_lookup_root_sec(server, fhandle, info,
2895 server->auth_info.flavors[i]);
2896 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2897 continue;
2898 break;
2899 }
2900 } else {
2901 /* no flavors specified by user, try default list */
2902 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2903 status = nfs4_lookup_root_sec(server, fhandle, info,
2904 flav_array[i]);
2905 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2906 continue;
2907 break;
2908 }
8f70e95f 2909 }
9a744ba3 2910
fb8a5ba8
BS		 2911 /*
2912 * -EACCESS could mean that the user doesn't have correct permissions
2913 * to access the mount. It could also mean that we tried to mount
2914 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2915 * existing mount programs don't handle -EACCES very well so it should
2916 * be mapped to -EPERM instead.
2917 */
2918 if (status == -EACCES)
2919 status = -EPERM;
801a16dc
BS		 2920 return status;
2921}
2922
2ed4b95b
CL		 2923static int nfs4_do_find_root_sec(struct nfs_server *server,
2924 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2925{
2926 int mv = server->nfs_client->cl_minorversion;
2927 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2928}
2929
2930/**
2931 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2932 * @server: initialized nfs_server handle
2933 * @fhandle: we fill in the pseudo-fs root file handle
2934 * @info: we fill in an FSINFO struct
5e6b1990 2935 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2936 *
2937 * Returns zero on success, or a negative errno.
801a16dc 2938 */
3028eb2b 2939int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2940 struct nfs_fsinfo *info,
2941 bool auth_probe)
801a16dc 2942{
2ed4b95b
CL		 2943 int status;
2944
5e6b1990
TM		 2945 switch (auth_probe) {
2946 case false:
2947 status = nfs4_lookup_root(server, fhandle, info);
2948 if (status != -NFS4ERR_WRONGSEC)
2949 break;
5e6b1990 2950 default:
2ed4b95b 2951 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2952 }
2ed4b95b 2953
1da177e4
LT		 2954 if (status == 0)
2955 status = nfs4_server_capabilities(server, fhandle);
2956 if (status == 0)
2957 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2958
c12e87f4 2959 return nfs4_map_errors(status);
1da177e4
LT		 2960}
2961
bae36241
BS		 2962static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2963 struct nfs_fsinfo *info)
2964{
2965 int error;
2966 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2967 struct nfs4_label *label = NULL;
bae36241
BS		 2968
2969 error = nfs4_server_capabilities(server, mntfh);
2970 if (error < 0) {
2971 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2972 return error;
2973 }
2974
14c43f76
DQ		 2975 label = nfs4_label_alloc(server, GFP_KERNEL);
2976 if (IS_ERR(label))
2977 return PTR_ERR(label);
2978
1775fd3e 2979 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2980 if (error < 0) {
2981 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2982 goto err_free_label;
bae36241
BS		 2983 }
2984
2985 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2986 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2987 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2988
14c43f76
DQ		 2989err_free_label:
2990 nfs4_label_free(label);
2991
bae36241
BS		 2992 return error;
2993}
2994
6b97fd3d
MN		 2995/*
2996 * Get locations and (maybe) other attributes of a referral.
2997 * Note that we'll actually follow the referral later when
2998 * we detect fsid mismatch in inode revalidation
2999 */
f05d147f
BS		 3000static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3001 const struct qstr *name, struct nfs_fattr *fattr,
3002 struct nfs_fh *fhandle)
6b97fd3d
MN		 3003{
3004 int status = -ENOMEM;
3005 struct page *page = NULL;
3006 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3007
3008 page = alloc_page(GFP_KERNEL);
3009 if (page == NULL)
3010 goto out;
3011 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3012 if (locations == NULL)
3013 goto out;
3014
f05d147f 3015 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3016 if (status != 0)
3017 goto out;
519ae255
CL		 3018
3019 /*
3020 * If the fsid didn't change, this is a migration event, not a
3021 * referral. Cause us to drop into the exception handler, which
3022 * will kick off migration recovery.
3023 */
6b97fd3d 3024 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3025 dprintk("%s: server did not return a different fsid for"
3026 " a referral at %s\n", __func__, name->name);
519ae255 3027 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3028 goto out;
3029 }
533eb461
AA		 3030 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3031 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3032
533eb461 3033 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3034 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3035 memset(fhandle, 0, sizeof(struct nfs_fh));
3036out:
3037 if (page)
3038 __free_page(page);
5d7ca35a 3039 kfree(locations);
6b97fd3d
MN		 3040 return status;
3041}
3042
1775fd3e
DQ		 3043static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3044 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3045{
3046 struct nfs4_getattr_arg args = {
3047 .fh = fhandle,
3048 .bitmask = server->attr_bitmask,
3049 };
3050 struct nfs4_getattr_res res = {
3051 .fattr = fattr,
1775fd3e 3052 .label = label,
1da177e4
LT		 3053 .server = server,
3054 };
3055 struct rpc_message msg = {
3056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3057 .rpc_argp = &args,
3058 .rpc_resp = &res,
3059 };
aa9c2669
DQ		 3060
3061 args.bitmask = nfs4_bitmask(server, label);
3062
0e574af1 3063 nfs_fattr_init(fattr);
7c513058 3064 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3065}
3066
1775fd3e
DQ		 3067static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3068 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3069{
3070 struct nfs4_exception exception = { };
3071 int err;
3072 do {
b5f875a9
TM		 3073 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3074 trace_nfs4_getattr(server, fhandle, fattr, err);
3075 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3076 &exception);
3077 } while (exception.retry);
3078 return err;
3079}
3080
3081/*
3082 * The file is not closed if it is opened due to the a request to change
3083 * the size of the file. The open call will not be needed once the
3084 * VFS layer lookup-intents are implemented.
3085 *
3086 * Close is called when the inode is destroyed.
3087 * If we haven't opened the file for O_WRONLY, we
3088 * need to in the size_change case to obtain a stateid.
3089 *
3090 * Got race?
3091 * Because OPEN is always done by name in nfsv4, it is
3092 * possible that we opened a different file by the same
3093 * name. We can recognize this race condition, but we
3094 * can't do anything about it besides returning an error.
3095 *
3096 * This will be fixed with VFS changes (lookup-intent).
3097 */
3098static int
3099nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3100 struct iattr *sattr)
3101{
08e9eac4 3102 struct inode *inode = dentry->d_inode;
659bfcd6 3103 struct rpc_cred *cred = NULL;
d530838b 3104 struct nfs4_state *state = NULL;
14c43f76 3105 struct nfs4_label *label = NULL;
1da177e4
LT		 3106 int status;
3107
8a1636c4 3108 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3109 pnfs_commit_and_return_layout(inode);
8a1636c4 3110
0e574af1 3111 nfs_fattr_init(fattr);
1da177e4 3112
2669940d
AA		 3113 /* Deal with open(O_TRUNC) */
3114 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3115 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3116
3117 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3118 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3119 return 0;
3120
d530838b 3121 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3122 if (sattr->ia_valid & ATTR_FILE) {
3123 struct nfs_open_context *ctx;
3124
3125 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3126 if (ctx) {
3127 cred = ctx->cred;
3128 state = ctx->state;
3129 }
659bfcd6 3130 }
08e9eac4 3131
14c43f76
DQ		 3132 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3133 if (IS_ERR(label))
3134 return PTR_ERR(label);
3135
3136 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3137 if (status == 0) {
65e4308d 3138 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3139 nfs_setsecurity(inode, fattr, label);
3140 }
14c43f76 3141 nfs4_label_free(label);
1da177e4
LT		 3142 return status;
3143}
3144
0c2e53f1
TM		 3145static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3146 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3147 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3148{
0c2e53f1 3149 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3150 int status;
3151 struct nfs4_lookup_arg args = {
3152 .bitmask = server->attr_bitmask,
0c2e53f1 3153 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3154 .name = name,
3155 };
3156 struct nfs4_lookup_res res = {
3157 .server = server,
3158 .fattr = fattr,
aa9c2669 3159 .label = label,
2b3de441
DH		 3160 .fh = fhandle,
3161 };
3162 struct rpc_message msg = {
3163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3164 .rpc_argp = &args,
3165 .rpc_resp = &res,
3166 };
3167
aa9c2669
DQ		 3168 args.bitmask = nfs4_bitmask(server, label);
3169
2b3de441
DH		 3170 nfs_fattr_init(fattr);
3171
1da177e4 3172 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3173 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3174 dprintk("NFS reply lookup: %d\n", status);
3175 return status;
3176}
3177
72de53ec 3178static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3179{
7ebb9315 3180 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3181 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3182 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3183 fattr->nlink = 2;
3184}
3185
72de53ec
BS		 3186static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3187 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3188 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3189{
3190 struct nfs4_exception exception = { };
72de53ec 3191 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3192 int err;
3193 do {
1775fd3e 3194 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3195 trace_nfs4_lookup(dir, name, err);
72de53ec 3196 switch (err) {
08ef7bd3 3197 case -NFS4ERR_BADNAME:
72de53ec
BS		 3198 err = -ENOENT;
3199 goto out;
0c2e53f1 3200 case -NFS4ERR_MOVED:
f05d147f 3201 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3202 goto out;
0c2e53f1 3203 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3204 err = -EPERM;
3205 if (client != *clnt)
3206 goto out;
72de53ec
BS		 3207 client = nfs4_create_sec_client(client, dir, name);
3208 if (IS_ERR(client))
3209 return PTR_ERR(client);
3210
3211 exception.retry = 1;
3212 break;
3213 default:
3214 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3215 }
1da177e4 3216 } while (exception.retry);
72de53ec
BS		 3217
3218out:
3219 if (err == 0)
3220 *clnt = client;
3221 else if (client != *clnt)
3222 rpc_shutdown_client(client);
3223
1da177e4
LT		 3224 return err;
3225}
3226
80a16b21 3227static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3228 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3229 struct nfs4_label *label)
72de53ec
BS		 3230{
3231 int status;
3232 struct rpc_clnt *client = NFS_CLIENT(dir);
3233
1775fd3e 3234 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3235 if (client != NFS_CLIENT(dir)) {
3236 rpc_shutdown_client(client);
3237 nfs_fixup_secinfo_attributes(fattr);
3238 }
3239 return status;
3240}
3241
f05d147f
BS		 3242struct rpc_clnt *
3243nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3244 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3245{
b72888cb 3246 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3247 int status;
f05d147f 3248
1775fd3e 3249 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3250 if (status < 0)
f05d147f 3251 return ERR_PTR(status);
b72888cb 3252 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3253}
3254
1da177e4
LT		 3255static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3256{
76b32999 3257 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3258 struct nfs4_accessargs args = {
3259 .fh = NFS_FH(inode),
a4980e78 3260 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3261 };
3262 struct nfs4_accessres res = {
3263 .server = server,
1da177e4 3264 };
1da177e4
LT		 3265 struct rpc_message msg = {
3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3267 .rpc_argp = &args,
3268 .rpc_resp = &res,
3269 .rpc_cred = entry->cred,
3270 };
3271 int mode = entry->mask;
aa9c2669 3272 int status = 0;
1da177e4
LT		 3273
3274 /*
3275 * Determine which access bits we want to ask for...
3276 */
3277 if (mode & MAY_READ)
3278 args.access |= NFS4_ACCESS_READ;
3279 if (S_ISDIR(inode->i_mode)) {
3280 if (mode & MAY_WRITE)
3281 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3282 if (mode & MAY_EXEC)
3283 args.access |= NFS4_ACCESS_LOOKUP;
3284 } else {
3285 if (mode & MAY_WRITE)
3286 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3287 if (mode & MAY_EXEC)
3288 args.access |= NFS4_ACCESS_EXECUTE;
3289 }
c407d41a
TM		 3290
3291 res.fattr = nfs_alloc_fattr();
3292 if (res.fattr == NULL)
3293 return -ENOMEM;
3294
7c513058 3295 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3296 if (!status) {
6168f62c 3297 nfs_access_set_mask(entry, res.access);
c407d41a 3298 nfs_refresh_inode(inode, res.fattr);
1da177e4 3299 }
c407d41a 3300 nfs_free_fattr(res.fattr);
1da177e4
LT		 3301 return status;
3302}
3303
3304static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3305{
3306 struct nfs4_exception exception = { };
3307 int err;
3308 do {
c1578b76
TM		 3309 err = _nfs4_proc_access(inode, entry);
3310 trace_nfs4_access(inode, err);
3311 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3312 &exception);
3313 } while (exception.retry);
3314 return err;
3315}
3316
3317/*
3318 * TODO: For the time being, we don't try to get any attributes
3319 * along with any of the zero-copy operations READ, READDIR,
3320 * READLINK, WRITE.
3321 *
3322 * In the case of the first three, we want to put the GETATTR
3323 * after the read-type operation -- this is because it is hard
3324 * to predict the length of a GETATTR response in v4, and thus
3325 * align the READ data correctly. This means that the GETATTR
3326 * may end up partially falling into the page cache, and we should
3327 * shift it into the 'tail' of the xdr_buf before processing.
3328 * To do this efficiently, we need to know the total length
3329 * of data received, which doesn't seem to be available outside
3330 * of the RPC layer.
3331 *
3332 * In the case of WRITE, we also want to put the GETATTR after
3333 * the operation -- in this case because we want to make sure
140150db 3334 * we get the post-operation mtime and size.
1da177e4
LT		 3335 *
3336 * Both of these changes to the XDR layer would in fact be quite
3337 * minor, but I decided to leave them for a subsequent patch.
3338 */
3339static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3340 unsigned int pgbase, unsigned int pglen)
3341{
3342 struct nfs4_readlink args = {
3343 .fh = NFS_FH(inode),
3344 .pgbase = pgbase,
3345 .pglen = pglen,
3346 .pages = &page,
3347 };
f50c7000 3348 struct nfs4_readlink_res res;
1da177e4
LT		 3349 struct rpc_message msg = {
3350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3351 .rpc_argp = &args,
f50c7000 3352 .rpc_resp = &res,
1da177e4
LT		 3353 };
3354
7c513058 3355 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3356}
3357
3358static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3359 unsigned int pgbase, unsigned int pglen)
3360{
3361 struct nfs4_exception exception = { };
3362 int err;
3363 do {
c1578b76
TM		 3364 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3365 trace_nfs4_readlink(inode, err);
3366 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3367 &exception);
3368 } while (exception.retry);
3369 return err;
3370}
3371
1da177e4 3372/*
8867fe58 3373 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3374 */
1da177e4
LT		 3375static int
3376nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3377 int flags)
1da177e4 3378{
aa9c2669 3379 struct nfs4_label l, *ilabel = NULL;
8867fe58 3380 struct nfs_open_context *ctx;
1da177e4 3381 struct nfs4_state *state;
5bc2afc2 3382 int opened = 0;
1da177e4
LT		 3383 int status = 0;
3384
8867fe58
MS		 3385 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3386 if (IS_ERR(ctx))
3387 return PTR_ERR(ctx);
3388
aa9c2669
DQ		 3389 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3390
a8a5da99 3391 sattr->ia_mode &= ~current_umask();
5bc2afc2 3392 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3393 if (IS_ERR(state)) {
3394 status = PTR_ERR(state);
c0204fd2 3395 goto out;
1da177e4 3396 }
1da177e4 3397out:
aa9c2669 3398 nfs4_label_release_security(ilabel);
8867fe58 3399 put_nfs_open_context(ctx);
1da177e4
LT		 3400 return status;
3401}
3402
3403static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3404{
16e42959 3405 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3406 struct nfs_removeargs args = {
1da177e4 3407 .fh = NFS_FH(dir),
26fe5750 3408 .name = *name,
16e42959 3409 };
4fdc17b2 3410 struct nfs_removeres res = {
16e42959 3411 .server = server,
1da177e4 3412 };
1da177e4 3413 struct rpc_message msg = {
4fdc17b2
TM		 3414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3415 .rpc_argp = &args,
3416 .rpc_resp = &res,
1da177e4 3417 };
778d2817 3418 int status;
1da177e4 3419
7c513058 3420 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3421 if (status == 0)
16e42959 3422 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3423 return status;
3424}
3425
3426static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3427{
3428 struct nfs4_exception exception = { };
3429 int err;
3430 do {
078ea3df
TM		 3431 err = _nfs4_proc_remove(dir, name);
3432 trace_nfs4_remove(dir, name, err);
3433 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3434 &exception);
3435 } while (exception.retry);
3436 return err;
3437}
3438
e4eff1a6 3439static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3440{
e4eff1a6
TM		 3441 struct nfs_server *server = NFS_SERVER(dir);
3442 struct nfs_removeargs *args = msg->rpc_argp;
3443 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3444
e4eff1a6 3445 res->server = server;
1da177e4 3446 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3447 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3448
3449 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3450}
3451
34e137cc
BS		 3452static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3453{
d9afbd1b
TM		 3454 nfs4_setup_sequence(NFS_SERVER(data->dir),
3455 &data->args.seq_args,
3456 &data->res.seq_res,
3457 task);
1da177e4
LT		 3458}
3459
e4eff1a6 3460static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3461{
078ea3df
TM		 3462 struct nfs_unlinkdata *data = task->tk_calldata;
3463 struct nfs_removeres *res = &data->res;
e4eff1a6 3464
14516c3a
TM		 3465 if (!nfs4_sequence_done(task, &res->seq_res))
3466 return 0;
9e33bed5 3467 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3468 return 0;
3469 update_changeattr(dir, &res->cinfo);
e4eff1a6 3470 return 1;
1da177e4
LT		 3471}
3472
d3d4152a
JL		 3473static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3474{
3475 struct nfs_server *server = NFS_SERVER(dir);
3476 struct nfs_renameargs *arg = msg->rpc_argp;
3477 struct nfs_renameres *res = msg->rpc_resp;
3478
3479 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3480 res->server = server;
a9c92d6b 3481 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3482}
3483
c6bfa1a1
BS		 3484static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3485{
d9afbd1b
TM		 3486 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3487 &data->args.seq_args,
3488 &data->res.seq_res,
3489 task);
d3d4152a
JL		 3490}
3491
3492static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3493 struct inode *new_dir)
3494{
fbc6f7c2
TM		 3495 struct nfs_renamedata *data = task->tk_calldata;
3496 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3497
3498 if (!nfs4_sequence_done(task, &res->seq_res))
3499 return 0;
3500 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3501 return 0;
3502
3503 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3504 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3505 return 1;
3506}
3507
1da177e4
LT		 3508static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3509 struct inode *new_dir, struct qstr *new_name)
3510{
6caf2c82 3511 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3512 struct nfs_renameargs arg = {
1da177e4
LT		 3513 .old_dir = NFS_FH(old_dir),
3514 .new_dir = NFS_FH(new_dir),
3515 .old_name = old_name,
3516 .new_name = new_name,
6caf2c82 3517 };
e8582a8b 3518 struct nfs_renameres res = {
6caf2c82 3519 .server = server,
1da177e4 3520 };
1da177e4
LT		 3521 struct rpc_message msg = {
3522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3523 .rpc_argp = &arg,
3524 .rpc_resp = &res,
3525 };
011fff72 3526 int status = -ENOMEM;
14c43f76 3527
7c513058 3528 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3529 if (!status) {
3530 update_changeattr(old_dir, &res.old_cinfo);
3531 update_changeattr(new_dir, &res.new_cinfo);
3532 }
3533 return status;
3534}
3535
3536static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3537 struct inode *new_dir, struct qstr *new_name)
3538{
3539 struct nfs4_exception exception = { };
3540 int err;
3541 do {
fbc6f7c2
TM		 3542 err = _nfs4_proc_rename(old_dir, old_name,
3543 new_dir, new_name);
3544 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3545 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3546 &exception);
3547 } while (exception.retry);
3548 return err;
3549}
3550
3551static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3552{
91ba2eee 3553 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3554 struct nfs4_link_arg arg = {
3555 .fh = NFS_FH(inode),
3556 .dir_fh = NFS_FH(dir),
3557 .name = name,
91ba2eee
TM		 3558 .bitmask = server->attr_bitmask,
3559 };
91ba2eee
TM		 3560 struct nfs4_link_res res = {
3561 .server = server,
1775fd3e 3562 .label = NULL,
1da177e4 3563 };
1da177e4
LT		 3564 struct rpc_message msg = {
3565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3566 .rpc_argp = &arg,
91ba2eee 3567 .rpc_resp = &res,
1da177e4 3568 };
136f2627
TM		 3569 int status = -ENOMEM;
3570
3571 res.fattr = nfs_alloc_fattr();
778d2817 3572 if (res.fattr == NULL)
136f2627 3573 goto out;
1da177e4 3574
14c43f76
DQ		 3575 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3576 if (IS_ERR(res.label)) {
3577 status = PTR_ERR(res.label);
3578 goto out;
3579 }
aa9c2669 3580 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3581
7c513058 3582 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3583 if (!status) {
3584 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3585 status = nfs_post_op_update_inode(inode, res.fattr);
3586 if (!status)
3587 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3588 }
14c43f76
DQ		 3589
3590
3591 nfs4_label_free(res.label);
3592
136f2627 3593out:
136f2627 3594 nfs_free_fattr(res.fattr);
1da177e4
LT		 3595 return status;
3596}
3597
3598static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3599{
3600 struct nfs4_exception exception = { };
3601 int err;
3602 do {
3603 err = nfs4_handle_exception(NFS_SERVER(inode),
3604 _nfs4_proc_link(inode, dir, name),
3605 &exception);
3606 } while (exception.retry);
3607 return err;
3608}
3609
57dc9a57
TM		 3610struct nfs4_createdata {
3611 struct rpc_message msg;
3612 struct nfs4_create_arg arg;
3613 struct nfs4_create_res res;
3614 struct nfs_fh fh;
3615 struct nfs_fattr fattr;
1775fd3e 3616 struct nfs4_label *label;
57dc9a57
TM		 3617};
3618
3619static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3620 struct qstr *name, struct iattr *sattr, u32 ftype)
3621{
3622 struct nfs4_createdata *data;
3623
3624 data = kzalloc(sizeof(*data), GFP_KERNEL);
3625 if (data != NULL) {
3626 struct nfs_server *server = NFS_SERVER(dir);
3627
14c43f76
DQ		 3628 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3629 if (IS_ERR(data->label))
3630 goto out_free;
3631
57dc9a57
TM		 3632 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3633 data->msg.rpc_argp = &data->arg;
3634 data->msg.rpc_resp = &data->res;
3635 data->arg.dir_fh = NFS_FH(dir);
3636 data->arg.server = server;
3637 data->arg.name = name;
3638 data->arg.attrs = sattr;
3639 data->arg.ftype = ftype;
aa9c2669 3640 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3641 data->res.server = server;
3642 data->res.fh = &data->fh;
3643 data->res.fattr = &data->fattr;
1775fd3e 3644 data->res.label = data->label;
57dc9a57 3645 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3646 }
3647 return data;
14c43f76
DQ		 3648out_free:
3649 kfree(data);
3650 return NULL;
57dc9a57
TM		 3651}
3652
3653static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3654{
7c513058 3655 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3656 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3657 if (status == 0) {
3658 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3659 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3660 }
3661 return status;
3662}
3663
3664static void nfs4_free_createdata(struct nfs4_createdata *data)
3665{
14c43f76 3666 nfs4_label_free(data->label);
57dc9a57
TM		 3667 kfree(data);
3668}
3669
4f390c15 3670static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3671 struct page *page, unsigned int len, struct iattr *sattr,
3672 struct nfs4_label *label)
1da177e4 3673{
57dc9a57
TM		 3674 struct nfs4_createdata *data;
3675 int status = -ENAMETOOLONG;
1da177e4 3676
94a6d753 3677 if (len > NFS4_MAXPATHLEN)
57dc9a57 3678 goto out;
4f390c15 3679
57dc9a57
TM		 3680 status = -ENOMEM;
3681 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3682 if (data == NULL)
3683 goto out;
3684
3685 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3686 data->arg.u.symlink.pages = &page;
3687 data->arg.u.symlink.len = len;
1775fd3e 3688 data->arg.label = label;
1da177e4 3689
57dc9a57
TM		 3690 status = nfs4_do_create(dir, dentry, data);
3691
3692 nfs4_free_createdata(data);
3693out:
1da177e4
LT		 3694 return status;
3695}
3696
4f390c15 3697static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3698 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3699{
3700 struct nfs4_exception exception = { };
aa9c2669 3701 struct nfs4_label l, *label = NULL;
1da177e4 3702 int err;
aa9c2669
DQ		 3703
3704 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3705
1da177e4 3706 do {
078ea3df
TM		 3707 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3708 trace_nfs4_symlink(dir, &dentry->d_name, err);
3709 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3710 &exception);
3711 } while (exception.retry);
aa9c2669
DQ		 3712
3713 nfs4_label_release_security(label);
1da177e4
LT		 3714 return err;
3715}
3716
3717static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3718 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3719{
57dc9a57
TM		 3720 struct nfs4_createdata *data;
3721 int status = -ENOMEM;
1da177e4 3722
57dc9a57
TM		 3723 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3724 if (data == NULL)
3725 goto out;
3726
1775fd3e 3727 data->arg.label = label;
57dc9a57
TM		 3728 status = nfs4_do_create(dir, dentry, data);
3729
3730 nfs4_free_createdata(data);
3731out:
1da177e4
LT		 3732 return status;
3733}
3734
3735static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3736 struct iattr *sattr)
3737{
3738 struct nfs4_exception exception = { };
aa9c2669 3739 struct nfs4_label l, *label = NULL;
1da177e4 3740 int err;
a8a5da99 3741
aa9c2669
DQ		 3742 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3743
a8a5da99 3744 sattr->ia_mode &= ~current_umask();
1da177e4 3745 do {
078ea3df
TM		 3746 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3747 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3748 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3749 &exception);
3750 } while (exception.retry);
aa9c2669
DQ		 3751 nfs4_label_release_security(label);
3752
1da177e4
LT		 3753 return err;
3754}
3755
3756static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3757 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3758{
3759 struct inode *dir = dentry->d_inode;
3760 struct nfs4_readdir_arg args = {
3761 .fh = NFS_FH(dir),
56e4ebf8 3762 .pages = pages,
1da177e4
LT		 3763 .pgbase = 0,
3764 .count = count,
96d25e53 3765 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3766 .plus = plus,
1da177e4
LT		 3767 };
3768 struct nfs4_readdir_res res;
3769 struct rpc_message msg = {
3770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3771 .rpc_argp = &args,
3772 .rpc_resp = &res,
3773 .rpc_cred = cred,
3774 };
3775 int status;
3776
6de1472f
AV		 3777 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3778 dentry,
eadf4598 3779 (unsigned long long)cookie);
c3f52af3 3780 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3781 res.pgbase = args.pgbase;
7c513058 3782 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3783 if (status >= 0) {
c3f52af3 3784 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3785 status += args.pgbase;
3786 }
c4812998
TM		 3787
3788 nfs_invalidate_atime(dir);
3789
3110ff80 3790 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3791 return status;
3792}
3793
3794static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3795 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3796{
3797 struct nfs4_exception exception = { };
3798 int err;
3799 do {
c1578b76
TM		 3800 err = _nfs4_proc_readdir(dentry, cred, cookie,
3801 pages, count, plus);
3802 trace_nfs4_readdir(dentry->d_inode, err);
3803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3804 &exception);
3805 } while (exception.retry);
3806 return err;
3807}
3808
3809static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3810 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3811{
57dc9a57
TM		 3812 struct nfs4_createdata *data;
3813 int mode = sattr->ia_mode;
3814 int status = -ENOMEM;
1da177e4 3815
57dc9a57
TM		 3816 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3817 if (data == NULL)
3818 goto out;
3819
1da177e4 3820 if (S_ISFIFO(mode))
57dc9a57 3821 data->arg.ftype = NF4FIFO;
1da177e4 3822 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3823 data->arg.ftype = NF4BLK;
3824 data->arg.u.device.specdata1 = MAJOR(rdev);
3825 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3826 }
3827 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3828 data->arg.ftype = NF4CHR;
3829 data->arg.u.device.specdata1 = MAJOR(rdev);
3830 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3831 } else if (!S_ISSOCK(mode)) {
3832 status = -EINVAL;
3833 goto out_free;
1da177e4 3834 }
1775fd3e 3835
aa9c2669 3836 data->arg.label = label;
57dc9a57 3837 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3838out_free:
57dc9a57
TM		 3839 nfs4_free_createdata(data);
3840out:
1da177e4
LT		 3841 return status;
3842}
3843
3844static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3845 struct iattr *sattr, dev_t rdev)
3846{
3847 struct nfs4_exception exception = { };
aa9c2669 3848 struct nfs4_label l, *label = NULL;
1da177e4 3849 int err;
a8a5da99 3850
aa9c2669
DQ		 3851 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3852
a8a5da99 3853 sattr->ia_mode &= ~current_umask();
1da177e4 3854 do {
078ea3df
TM		 3855 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3856 trace_nfs4_mknod(dir, &dentry->d_name, err);
3857 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3858 &exception);
3859 } while (exception.retry);
aa9c2669
DQ		 3860
3861 nfs4_label_release_security(label);
3862
1da177e4
LT		 3863 return err;
3864}
3865
3866static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3867 struct nfs_fsstat *fsstat)
3868{
3869 struct nfs4_statfs_arg args = {
3870 .fh = fhandle,
3871 .bitmask = server->attr_bitmask,
3872 };
24ad148a
BH		 3873 struct nfs4_statfs_res res = {
3874 .fsstat = fsstat,
3875 };
1da177e4
LT		 3876 struct rpc_message msg = {
3877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3878 .rpc_argp = &args,
24ad148a 3879 .rpc_resp = &res,
1da177e4
LT		 3880 };
3881
0e574af1 3882 nfs_fattr_init(fsstat->fattr);
7c513058 3883 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3884}
3885
3886static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3887{
3888 struct nfs4_exception exception = { };
3889 int err;
3890 do {
3891 err = nfs4_handle_exception(server,
3892 _nfs4_proc_statfs(server, fhandle, fsstat),
3893 &exception);
3894 } while (exception.retry);
3895 return err;
3896}
3897
3898static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3899 struct nfs_fsinfo *fsinfo)
3900{
3901 struct nfs4_fsinfo_arg args = {
3902 .fh = fhandle,
3903 .bitmask = server->attr_bitmask,
3904 };
3dda5e43
BH		 3905 struct nfs4_fsinfo_res res = {
3906 .fsinfo = fsinfo,
3907 };
1da177e4
LT		 3908 struct rpc_message msg = {
3909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3910 .rpc_argp = &args,
3dda5e43 3911 .rpc_resp = &res,
1da177e4
LT		 3912 };
3913
7c513058 3914 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3915}
3916
3917static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3918{
3919 struct nfs4_exception exception = { };
83ca7f5a 3920 unsigned long now = jiffies;
1da177e4
LT		 3921 int err;
3922
3923 do {
83ca7f5a 3924 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3925 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3926 if (err == 0) {
3927 struct nfs_client *clp = server->nfs_client;
3928
3929 spin_lock(&clp->cl_lock);
3930 clp->cl_lease_time = fsinfo->lease_time * HZ;
3931 clp->cl_last_renewal = now;
3932 spin_unlock(&clp->cl_lock);
3933 break;
3934 }
3935 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3936 } while (exception.retry);
3937 return err;
3938}
3939
3940static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3941{
e38eb650
BS		 3942 int error;
3943
0e574af1 3944 nfs_fattr_init(fsinfo->fattr);
e38eb650 3945 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3946 if (error == 0) {
3947 /* block layout checks this! */
3948 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3949 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3950 }
e38eb650
BS		 3951
3952 return error;
1da177e4
LT		 3953}
3954
3955static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3956 struct nfs_pathconf *pathconf)
3957{
3958 struct nfs4_pathconf_arg args = {
3959 .fh = fhandle,
3960 .bitmask = server->attr_bitmask,
3961 };
d45b2989
BH		 3962 struct nfs4_pathconf_res res = {
3963 .pathconf = pathconf,
3964 };
1da177e4
LT		 3965 struct rpc_message msg = {
3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3967 .rpc_argp = &args,
d45b2989 3968 .rpc_resp = &res,
1da177e4
LT		 3969 };
3970
3971 /* None of the pathconf attributes are mandatory to implement */
3972 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3973 memset(pathconf, 0, sizeof(*pathconf));
3974 return 0;
3975 }
3976
0e574af1 3977 nfs_fattr_init(pathconf->fattr);
7c513058 3978 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3979}
3980
3981static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3982 struct nfs_pathconf *pathconf)
3983{
3984 struct nfs4_exception exception = { };
3985 int err;
3986
3987 do {
3988 err = nfs4_handle_exception(server,
3989 _nfs4_proc_pathconf(server, fhandle, pathconf),
3990 &exception);
3991 } while (exception.retry);
3992 return err;
3993}
3994
5521abfd 3995int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3996 const struct nfs_open_context *ctx,
3997 const struct nfs_lock_context *l_ctx,
3998 fmode_t fmode)
3999{
4000 const struct nfs_lockowner *lockowner = NULL;
4001
4002 if (l_ctx != NULL)
4003 lockowner = &l_ctx->lockowner;
5521abfd 4004 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4005}
4006EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4007
5521abfd
TM		 4008static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4009 const struct nfs_open_context *ctx,
4010 const struct nfs_lock_context *l_ctx,
4011 fmode_t fmode)
4012{
4013 nfs4_stateid current_stateid;
4014
4015 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
4016 return false;
4017 return nfs4_stateid_match(stateid, &current_stateid);
4018}
4019
4020static bool nfs4_error_stateid_expired(int err)
4021{
4022 switch (err) {
4023 case -NFS4ERR_DELEG_REVOKED:
4024 case -NFS4ERR_ADMIN_REVOKED:
4025 case -NFS4ERR_BAD_STATEID:
4026 case -NFS4ERR_STALE_STATEID:
4027 case -NFS4ERR_OLD_STATEID:
4028 case -NFS4ERR_OPENMODE:
4029 case -NFS4ERR_EXPIRED:
4030 return true;
4031 }
4032 return false;
4033}
4034
d20581aa
BH		 4035void __nfs4_read_done_cb(struct nfs_read_data *data)
4036{
cd841605 4037 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4038}
4039
cbdabc7f 4040static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4041{
cd841605 4042 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4043
cc668ab3 4044 trace_nfs4_read(data, task->tk_status);
9e33bed5 4045 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4046 rpc_restart_call_prepare(task);
ec06c096 4047 return -EAGAIN;
1da177e4 4048 }
8850df99 4049
d20581aa 4050 __nfs4_read_done_cb(data);
1da177e4 4051 if (task->tk_status > 0)
ec06c096
TM		 4052 renew_lease(server, data->timestamp);
4053 return 0;
1da177e4
LT		 4054}
4055
5521abfd
TM		 4056static bool nfs4_read_stateid_changed(struct rpc_task *task,
4057 struct nfs_readargs *args)
4058{
4059
4060 if (!nfs4_error_stateid_expired(task->tk_status) ||
4061 nfs4_stateid_is_current(&args->stateid,
4062 args->context,
4063 args->lock_context,
4064 FMODE_READ))
4065 return false;
4066 rpc_restart_call_prepare(task);
4067 return true;
4068}
4069
cbdabc7f
AA		 4070static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4071{
4072
4073 dprintk("--> %s\n", __func__);
4074
4075 if (!nfs4_sequence_done(task, &data->res.seq_res))
4076 return -EAGAIN;
5521abfd
TM		 4077 if (nfs4_read_stateid_changed(task, &data->args))
4078 return -EAGAIN;
d20581aa
BH		 4079 return data->read_done_cb ? data->read_done_cb(task, data) :
4080 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4081}
4082
bdc7f021 4083static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4084{
1da177e4 4085 data->timestamp = jiffies;
cbdabc7f 4086 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4087 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4088 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4089}
4090
ef1820f9 4091static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4092{
9b206149 4093 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4094 &data->args.seq_args,
4095 &data->res.seq_res,
9b206149 4096 task))
ef1820f9
N		 4097 return 0;
4098 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4099 data->args.lock_context, FMODE_READ) == -EIO)
4100 return -EIO;
4101 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4102 return -EIO;
4103 return 0;
1da177e4
LT		 4104}
4105
b029bc9b 4106static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4107{
cd841605 4108 struct inode *inode = data->header->inode;
1da177e4 4109
cc668ab3 4110 trace_nfs4_write(data, task->tk_status);
9e33bed5 4111 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4112 rpc_restart_call_prepare(task);
788e7a89 4113 return -EAGAIN;
1da177e4 4114 }
4f9838c7 4115 if (task->tk_status >= 0) {
1da177e4 4116 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4117 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4118 }
788e7a89 4119 return 0;
1da177e4
LT		 4120}
4121
5521abfd
TM		 4122static bool nfs4_write_stateid_changed(struct rpc_task *task,
4123 struct nfs_writeargs *args)
4124{
4125
4126 if (!nfs4_error_stateid_expired(task->tk_status) ||
4127 nfs4_stateid_is_current(&args->stateid,
4128 args->context,
4129 args->lock_context,
4130 FMODE_WRITE))
4131 return false;
4132 rpc_restart_call_prepare(task);
4133 return true;
4134}
4135
b029bc9b
FI		 4136static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4137{
4138 if (!nfs4_sequence_done(task, &data->res.seq_res))
4139 return -EAGAIN;
5521abfd
TM		 4140 if (nfs4_write_stateid_changed(task, &data->args))
4141 return -EAGAIN;
d20581aa
BH		 4142 return data->write_done_cb ? data->write_done_cb(task, data) :
4143 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4144}
4145
5a37f851
TM		 4146static
4147bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4148{
5a37f851
TM		 4149 const struct nfs_pgio_header *hdr = data->header;
4150
4151 /* Don't request attributes for pNFS or O_DIRECT writes */
4152 if (data->ds_clp != NULL || hdr->dreq != NULL)
4153 return false;
4154 /* Otherwise, request attributes if and only if we don't hold
4155 * a delegation
4156 */
011e2a7f 4157 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4158}
a69aef14 4159
bdc7f021 4160static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4161{
cd841605 4162 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4163
5a37f851 4164 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4165 data->args.bitmask = NULL;
4166 data->res.fattr = NULL;
4167 } else
4168 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4169
b029bc9b
FI		 4170 if (!data->write_done_cb)
4171 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4172 data->res.server = server;
1da177e4
LT		 4173 data->timestamp = jiffies;
4174
bdc7f021 4175 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4176 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4177}
4178
ef1820f9 4179static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4180{
9b206149 4181 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4182 &data->args.seq_args,
4183 &data->res.seq_res,
9b206149 4184 task))
ef1820f9
N		 4185 return 0;
4186 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4187 data->args.lock_context, FMODE_WRITE) == -EIO)
4188 return -EIO;
4189 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4190 return -EIO;
4191 return 0;
1da177e4
LT		 4192}
4193
0b7c0153 4194static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4195{
d9afbd1b
TM		 4196 nfs4_setup_sequence(NFS_SERVER(data->inode),
4197 &data->args.seq_args,
4198 &data->res.seq_res,
4199 task);
1da177e4
LT		 4200}
4201
0b7c0153 4202static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4203{
1da177e4 4204 struct inode *inode = data->inode;
14516c3a 4205
cc668ab3 4206 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4207 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4208 rpc_restart_call_prepare(task);
788e7a89 4209 return -EAGAIN;
1da177e4 4210 }
788e7a89 4211 return 0;
1da177e4
LT		 4212}
4213
0b7c0153 4214static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4215{
4216 if (!nfs4_sequence_done(task, &data->res.seq_res))
4217 return -EAGAIN;
0b7c0153 4218 return data->commit_done_cb(task, data);
5f452431
FI		 4219}
4220
0b7c0153 4221static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4222{
788e7a89 4223 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4224
0b7c0153
FI		 4225 if (data->commit_done_cb == NULL)
4226 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4227 data->res.server = server;
bdc7f021 4228 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4229 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4230}
4231
9bc4e3ca
CL		 4232struct nfs4_renewdata {
4233 struct nfs_client *client;
4234 unsigned long timestamp;
4235};
4236
1da177e4
LT		 4237/*
4238 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4239 * standalone procedure for queueing an asynchronous RENEW.
4240 */
9bc4e3ca 4241static void nfs4_renew_release(void *calldata)
dc96aef9 4242{
9bc4e3ca
CL		 4243 struct nfs4_renewdata *data = calldata;
4244 struct nfs_client *clp = data->client;
dc96aef9 4245
0851de06
AB		 4246 if (atomic_read(&clp->cl_count) > 1)
4247 nfs4_schedule_state_renewal(clp);
4248 nfs_put_client(clp);
9bc4e3ca 4249 kfree(data);
dc96aef9
AB		 4250}
4251
9bc4e3ca 4252static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4253{
9bc4e3ca
CL		 4254 struct nfs4_renewdata *data = calldata;
4255 struct nfs_client *clp = data->client;
4256 unsigned long timestamp = data->timestamp;
1da177e4 4257
c6d01c6f 4258 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4259 switch (task->tk_status) {
4260 case 0:
4261 break;
4262 case -NFS4ERR_LEASE_MOVED:
4263 nfs4_schedule_lease_moved_recovery(clp);
4264 break;
4265 default:
95baa25c 4266 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4267 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4268 return;
4269 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4270 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4271 return;
4272 }
4273 nfs4_schedule_path_down_recovery(clp);
1da177e4 4274 }
452e9352 4275 do_renew_lease(clp, timestamp);
1da177e4
LT		 4276}
4277
963d8fe5
TM		 4278static const struct rpc_call_ops nfs4_renew_ops = {
4279 .rpc_call_done = nfs4_renew_done,
dc96aef9 4280 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4281};
4282
2f60ea6b 4283static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4284{
4285 struct rpc_message msg = {
4286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4287 .rpc_argp = clp,
b4454fe1 4288 .rpc_cred = cred,
1da177e4 4289 };
9bc4e3ca 4290 struct nfs4_renewdata *data;
1da177e4 4291
2f60ea6b
TM		 4292 if (renew_flags == 0)
4293 return 0;
0851de06
AB		 4294 if (!atomic_inc_not_zero(&clp->cl_count))
4295 return -EIO;
b569ad34 4296 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4297 if (data == NULL)
4298 return -ENOMEM;
4299 data->client = clp;
4300 data->timestamp = jiffies;
bc7a05ca 4301 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4302 &nfs4_renew_ops, data);
1da177e4
LT		 4303}
4304
8534d4ec 4305static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4306{
4307 struct rpc_message msg = {
4308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4309 .rpc_argp = clp,
b4454fe1 4310 .rpc_cred = cred,
1da177e4
LT		 4311 };
4312 unsigned long now = jiffies;
4313 int status;
4314
bc7a05ca 4315 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4316 if (status < 0)
4317 return status;
452e9352 4318 do_renew_lease(clp, now);
1da177e4
LT		 4319 return 0;
4320}
4321
aa1870af
BF		 4322static inline int nfs4_server_supports_acls(struct nfs_server *server)
4323{
4324 return (server->caps & NFS_CAP_ACLS)
4325 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4326 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4327}
4328
21f498c2
TM		 4329/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4330 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4331 * the stack.
4332 */
21f498c2 4333#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4334
e9e3d724
NH		 4335static int buf_to_pages_noslab(const void *buf, size_t buflen,
4336 struct page **pages, unsigned int *pgbase)
4337{
4338 struct page *newpage, **spages;
4339 int rc = 0;
4340 size_t len;
4341 spages = pages;
4342
4343 do {
21f498c2 4344 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4345 newpage = alloc_page(GFP_KERNEL);
4346
4347 if (newpage == NULL)
4348 goto unwind;
4349 memcpy(page_address(newpage), buf, len);
4350 buf += len;
4351 buflen -= len;
4352 *pages++ = newpage;
4353 rc++;
4354 } while (buflen != 0);
4355
4356 return rc;
4357
4358unwind:
4359 for(; rc > 0; rc--)
4360 __free_page(spages[rc-1]);
4361 return -ENOMEM;
4362}
4363
e50a1c2e
BF		 4364struct nfs4_cached_acl {
4365 int cached;
4366 size_t len;
3e9d4154 4367 char data[0];
e50a1c2e
BF		 4368};
4369
4370static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4371{
4372 struct nfs_inode *nfsi = NFS_I(inode);
4373
4374 spin_lock(&inode->i_lock);
4375 kfree(nfsi->nfs4_acl);
4376 nfsi->nfs4_acl = acl;
4377 spin_unlock(&inode->i_lock);
4378}
4379
4380static void nfs4_zap_acl_attr(struct inode *inode)
4381{
4382 nfs4_set_cached_acl(inode, NULL);
4383}
4384
4385static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4386{
4387 struct nfs_inode *nfsi = NFS_I(inode);
4388 struct nfs4_cached_acl *acl;
4389 int ret = -ENOENT;
4390
4391 spin_lock(&inode->i_lock);
4392 acl = nfsi->nfs4_acl;
4393 if (acl == NULL)
4394 goto out;
4395 if (buf == NULL) /* user is just asking for length */
4396 goto out_len;
4397 if (acl->cached == 0)
4398 goto out;
4399 ret = -ERANGE; /* see getxattr(2) man page */
4400 if (acl->len > buflen)
4401 goto out;
4402 memcpy(buf, acl->data, acl->len);
4403out_len:
4404 ret = acl->len;
4405out:
4406 spin_unlock(&inode->i_lock);
4407 return ret;
4408}
4409
5794d21e 4410static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4411{
4412 struct nfs4_cached_acl *acl;
b291f1b1 4413 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4414
1f1ea6c2 4415 if (buflen <= PAGE_SIZE) {
b291f1b1 4416 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4417 if (acl == NULL)
4418 goto out;
4419 acl->cached = 1;
5794d21e 4420 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4421 } else {
4422 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4423 if (acl == NULL)
4424 goto out;
4425 acl->cached = 0;
4426 }
4427 acl->len = acl_len;
4428out:
4429 nfs4_set_cached_acl(inode, acl);
4430}
4431
bf118a34
AA		 4432/*
4433 * The getxattr API returns the required buffer length when called with a
4434 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4435 * the required buf. On a NULL buf, we send a page of data to the server
4436 * guessing that the ACL request can be serviced by a page. If so, we cache
4437 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4438 * the cache. If not so, we throw away the page, and cache the required
4439 * length. The next getxattr call will then produce another round trip to
4440 * the server, this time with the input buf of the required size.
4441 */
16b4289c 4442static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4443{
bf118a34 4444 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4445 struct nfs_getaclargs args = {
4446 .fh = NFS_FH(inode),
4447 .acl_pages = pages,
4448 .acl_len = buflen,
4449 };
663c79b3
BH		 4450 struct nfs_getaclres res = {
4451 .acl_len = buflen,
4452 };
aa1870af
BF		 4453 struct rpc_message msg = {
4454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4455 .rpc_argp = &args,
663c79b3 4456 .rpc_resp = &res,
aa1870af 4457 };
21f498c2
TM		 4458 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4459 int ret = -ENOMEM, i;
aa1870af 4460
bf118a34
AA		 4461 /* As long as we're doing a round trip to the server anyway,
4462 * let's be prepared for a page of acl data. */
4463 if (npages == 0)
4464 npages = 1;
21f498c2
TM		 4465 if (npages > ARRAY_SIZE(pages))
4466 return -ERANGE;
5a006899 4467
bf118a34
AA		 4468 for (i = 0; i < npages; i++) {
4469 pages[i] = alloc_page(GFP_KERNEL);
4470 if (!pages[i])
4471 goto out_free;
e50a1c2e 4472 }
5a006899
SP		 4473
4474 /* for decoding across pages */
4475 res.acl_scratch = alloc_page(GFP_KERNEL);
4476 if (!res.acl_scratch)
4477 goto out_free;
4478
bf118a34
AA		 4479 args.acl_len = npages * PAGE_SIZE;
4480 args.acl_pgbase = 0;
5a006899 4481
de040bec 4482 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4483 __func__, buf, buflen, npages, args.acl_len);
4484 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4485 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4486 if (ret)
4487 goto out_free;
bf118a34 4488
1f1ea6c2
TM		 4489 /* Handle the case where the passed-in buffer is too short */
4490 if (res.acl_flags & NFS4_ACL_TRUNC) {
4491 /* Did the user only issue a request for the acl length? */
4492 if (buf == NULL)
4493 goto out_ok;
e50a1c2e 4494 ret = -ERANGE;
1f1ea6c2 4495 goto out_free;
e50a1c2e 4496 }
1f1ea6c2 4497 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4498 if (buf) {
4499 if (res.acl_len > buflen) {
4500 ret = -ERANGE;
4501 goto out_free;
4502 }
1f1ea6c2 4503 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4504 }
1f1ea6c2
TM		 4505out_ok:
4506 ret = res.acl_len;
e50a1c2e 4507out_free:
bf118a34
AA		 4508 for (i = 0; i < npages; i++)
4509 if (pages[i])
4510 __free_page(pages[i]);
331818f1
TM		 4511 if (res.acl_scratch)
4512 __free_page(res.acl_scratch);
aa1870af
BF		 4513 return ret;
4514}
4515
16b4289c
TM		 4516static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4517{
4518 struct nfs4_exception exception = { };
4519 ssize_t ret;
4520 do {
4521 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4522 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4523 if (ret >= 0)
4524 break;
4525 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4526 } while (exception.retry);
4527 return ret;
4528}
4529
e50a1c2e
BF		 4530static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4531{
4532 struct nfs_server *server = NFS_SERVER(inode);
4533 int ret;
4534
4535 if (!nfs4_server_supports_acls(server))
4536 return -EOPNOTSUPP;
4537 ret = nfs_revalidate_inode(server, inode);
4538 if (ret < 0)
4539 return ret;
08a22b39
AK		 4540 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4541 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4542 ret = nfs4_read_cached_acl(inode, buf, buflen);
4543 if (ret != -ENOENT)
bf118a34
AA		 4544 /* -ENOENT is returned if there is no ACL or if there is an ACL
4545 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4546 return ret;
4547 return nfs4_get_acl_uncached(inode, buf, buflen);
4548}
4549
16b4289c 4550static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4551{
4552 struct nfs_server *server = NFS_SERVER(inode);
4553 struct page *pages[NFS4ACL_MAXPAGES];
4554 struct nfs_setaclargs arg = {
4555 .fh = NFS_FH(inode),
4556 .acl_pages = pages,
4557 .acl_len = buflen,
4558 };
73c403a9 4559 struct nfs_setaclres res;
4b580ee3
BF		 4560 struct rpc_message msg = {
4561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4562 .rpc_argp = &arg,
73c403a9 4563 .rpc_resp = &res,
4b580ee3 4564 };
21f498c2 4565 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4566 int ret, i;
4b580ee3
BF		 4567
4568 if (!nfs4_server_supports_acls(server))
4569 return -EOPNOTSUPP;
21f498c2
TM		 4570 if (npages > ARRAY_SIZE(pages))
4571 return -ERANGE;
e9e3d724
NH		 4572 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4573 if (i < 0)
4574 return i;
57ec14c5 4575 nfs4_inode_return_delegation(inode);
7c513058 4576 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4577
4578 /*
4579 * Free each page after tx, so the only ref left is
4580 * held by the network stack
4581 */
4582 for (; i > 0; i--)
4583 put_page(pages[i-1]);
4584
08a22b39
AK		 4585 /*
4586 * Acl update can result in inode attribute update.
4587 * so mark the attribute cache invalid.
4588 */
4589 spin_lock(&inode->i_lock);
4590 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4591 spin_unlock(&inode->i_lock);
f41f7418
TM		 4592 nfs_access_zap_cache(inode);
4593 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4594 return ret;
4595}
4596
16b4289c
TM		 4597static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4598{
4599 struct nfs4_exception exception = { };
4600 int err;
4601 do {
c1578b76
TM		 4602 err = __nfs4_proc_set_acl(inode, buf, buflen);
4603 trace_nfs4_set_acl(inode, err);
4604 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4605 &exception);
4606 } while (exception.retry);
4607 return err;
4608}
4609
aa9c2669
DQ		 4610#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4611static int _nfs4_get_security_label(struct inode *inode, void *buf,
4612 size_t buflen)
4613{
4614 struct nfs_server *server = NFS_SERVER(inode);
4615 struct nfs_fattr fattr;
4616 struct nfs4_label label = {0, 0, buflen, buf};
4617
4618 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4619 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4620 .fh = NFS_FH(inode),
4621 .bitmask = bitmask,
4622 };
4623 struct nfs4_getattr_res res = {
4624 .fattr = &fattr,
4625 .label = &label,
4626 .server = server,
4627 };
4628 struct rpc_message msg = {
4629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4630 .rpc_argp = &arg,
aa9c2669
DQ		 4631 .rpc_resp = &res,
4632 };
4633 int ret;
4634
4635 nfs_fattr_init(&fattr);
4636
fcb63a9b 4637 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4638 if (ret)
4639 return ret;
4640 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4641 return -ENOENT;
4642 if (buflen < label.len)
4643 return -ERANGE;
4644 return 0;
4645}
4646
4647static int nfs4_get_security_label(struct inode *inode, void *buf,
4648 size_t buflen)
4649{
4650 struct nfs4_exception exception = { };
4651 int err;
4652
4653 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4654 return -EOPNOTSUPP;
4655
4656 do {
c1578b76
TM		 4657 err = _nfs4_get_security_label(inode, buf, buflen);
4658 trace_nfs4_get_security_label(inode, err);
4659 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4660 &exception);
4661 } while (exception.retry);
4662 return err;
4663}
4664
4665static int _nfs4_do_set_security_label(struct inode *inode,
4666 struct nfs4_label *ilabel,
4667 struct nfs_fattr *fattr,
4668 struct nfs4_label *olabel)
4669{
4670
4671 struct iattr sattr = {0};
4672 struct nfs_server *server = NFS_SERVER(inode);
4673 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4674 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4675 .fh = NFS_FH(inode),
4676 .iap = &sattr,
4677 .server = server,
4678 .bitmask = bitmask,
4679 .label = ilabel,
4680 };
4681 struct nfs_setattrres res = {
4682 .fattr = fattr,
4683 .label = olabel,
4684 .server = server,
4685 };
4686 struct rpc_message msg = {
4687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4688 .rpc_argp = &arg,
aa9c2669
DQ		 4689 .rpc_resp = &res,
4690 };
4691 int status;
4692
12207f69 4693 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4694
12207f69 4695 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4696 if (status)
4697 dprintk("%s failed: %d\n", __func__, status);
4698
4699 return status;
4700}
4701
4702static int nfs4_do_set_security_label(struct inode *inode,
4703 struct nfs4_label *ilabel,
4704 struct nfs_fattr *fattr,
4705 struct nfs4_label *olabel)
4706{
4707 struct nfs4_exception exception = { };
4708 int err;
4709
4710 do {
c1578b76
TM		 4711 err = _nfs4_do_set_security_label(inode, ilabel,
4712 fattr, olabel);
4713 trace_nfs4_set_security_label(inode, err);
4714 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4715 &exception);
4716 } while (exception.retry);
4717 return err;
4718}
4719
4720static int
4721nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4722{
4723 struct nfs4_label ilabel, *olabel = NULL;
4724 struct nfs_fattr fattr;
4725 struct rpc_cred *cred;
4726 struct inode *inode = dentry->d_inode;
4727 int status;
4728
4729 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4730 return -EOPNOTSUPP;
4731
4732 nfs_fattr_init(&fattr);
4733
4734 ilabel.pi = 0;
4735 ilabel.lfs = 0;
4736 ilabel.label = (char *)buf;
4737 ilabel.len = buflen;
4738
4739 cred = rpc_lookup_cred();
4740 if (IS_ERR(cred))
4741 return PTR_ERR(cred);
4742
4743 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4744 if (IS_ERR(olabel)) {
4745 status = -PTR_ERR(olabel);
4746 goto out;
4747 }
4748
4749 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4750 if (status == 0)
4751 nfs_setsecurity(inode, &fattr, olabel);
4752
4753 nfs4_label_free(olabel);
4754out:
4755 put_rpccred(cred);
4756 return status;
4757}
4758#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4759
4760
1da177e4 4761static int
aa5190d0 4762nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4763{
aa5190d0
TM		 4764 struct nfs_client *clp = server->nfs_client;
4765
4766 if (task->tk_status >= 0)
1da177e4
LT		 4767 return 0;
4768 switch(task->tk_status) {
a1d0b5ee 4769 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4770 case -NFS4ERR_ADMIN_REVOKED:
4771 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4772 if (state == NULL)
4773 break;
4774 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4775 case -NFS4ERR_OPENMODE:
4776 if (state == NULL)
4777 break;
5d422301 4778 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4779 goto recovery_failed;
0400a6b0 4780 goto wait_on_recovery;
0ced63d1 4781 case -NFS4ERR_EXPIRED:
5d422301
TM		 4782 if (state != NULL) {
4783 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4784 goto recovery_failed;
5d422301 4785 }
1da177e4 4786 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4787 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4788 nfs4_schedule_lease_recovery(clp);
4789 goto wait_on_recovery;
519ae255
CL		 4790 case -NFS4ERR_MOVED:
4791 if (nfs4_schedule_migration_recovery(server) < 0)
4792 goto recovery_failed;
4793 goto wait_on_recovery;
8ef2f8d4
CL		 4794 case -NFS4ERR_LEASE_MOVED:
4795 nfs4_schedule_lease_moved_recovery(clp);
4796 goto wait_on_recovery;
4745e315
AA		 4797#if defined(CONFIG_NFS_V4_1)
4798 case -NFS4ERR_BADSESSION:
4799 case -NFS4ERR_BADSLOT:
4800 case -NFS4ERR_BAD_HIGH_SLOT:
4801 case -NFS4ERR_DEADSESSION:
4802 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4803 case -NFS4ERR_SEQ_FALSE_RETRY:
4804 case -NFS4ERR_SEQ_MISORDERED:
4805 dprintk("%s ERROR %d, Reset session\n", __func__,
4806 task->tk_status);
9f594791 4807 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4808 goto wait_on_recovery;
4745e315 4809#endif /* CONFIG_NFS_V4_1 */
1da177e4 4810 case -NFS4ERR_DELAY:
aa5190d0 4811 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4812 case -NFS4ERR_GRACE:
1da177e4 4813 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4814 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4815 case -NFS4ERR_OLD_STATEID:
f1478c13 4816 goto restart_call;
1da177e4
LT		 4817 }
4818 task->tk_status = nfs4_map_errors(task->tk_status);
4819 return 0;
9f51a78e 4820recovery_failed:
5d422301
TM		 4821 task->tk_status = -EIO;
4822 return 0;
0400a6b0 4823wait_on_recovery:
a2c0b9e2 4824 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4825 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4826 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4827 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4828 goto recovery_failed;
f1478c13 4829restart_call:
a2c0b9e2
TM		 4830 task->tk_status = 0;
4831 return -EAGAIN;
1da177e4
LT		 4832}
4833
f092075d
CL		 4834static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4835 nfs4_verifier *bootverf)
cd93710e
CL		 4836{
4837 __be32 verf[2];
4838
2c820d9a
CL		 4839 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4840 /* An impossible timestamp guarantees this value
4841 * will never match a generated boot time. */
4842 verf[0] = 0;
17f26b12 4843 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4844 } else {
f092075d 4845 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4846 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4847 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4848 }
cd93710e
CL		 4849 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4850}
4851
e984a55a
CL		 4852static unsigned int
4853nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4854 char *buf, size_t len)
4855{
4856 unsigned int result;
4857
4858 rcu_read_lock();
4859 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4860 clp->cl_ipaddr,
4861 rpc_peeraddr2str(clp->cl_rpcclient,
4862 RPC_DISPLAY_ADDR),
4863 rpc_peeraddr2str(clp->cl_rpcclient,
4864 RPC_DISPLAY_PROTO));
4865 rcu_read_unlock();
4866 return result;
4867}
4868
4869static unsigned int
4870nfs4_init_uniform_client_string(const struct nfs_client *clp,
4871 char *buf, size_t len)
4872{
55b59293 4873 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4874
4875 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4876 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4877 clp->rpc_ops->version,
4878 clp->cl_minorversion,
4879 nfs4_client_id_uniquifier,
4880 nodename);
e984a55a
CL		 4881 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4882 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4883 nodename);
e984a55a
CL		 4884}
4885
6bbb4ae8
CL		 4886/**
4887 * nfs4_proc_setclientid - Negotiate client ID
4888 * @clp: state data structure
4889 * @program: RPC program for NFSv4 callback service
4890 * @port: IP port number for NFS4 callback service
4891 * @cred: RPC credential to use for this call
4892 * @res: where to place the result
4893 *
4894 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4895 */
bb8b27e5
TM		 4896int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4897 unsigned short port, struct rpc_cred *cred,
4898 struct nfs4_setclientid_res *res)
1da177e4
LT		 4899{
4900 nfs4_verifier sc_verifier;
4901 struct nfs4_setclientid setclientid = {
4902 .sc_verifier = &sc_verifier,
4903 .sc_prog = program,
f4eecd5d 4904 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4905 };
4906 struct rpc_message msg = {
4907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4908 .rpc_argp = &setclientid,
bb8b27e5 4909 .rpc_resp = res,
286d7d6a 4910 .rpc_cred = cred,
1da177e4 4911 };
6bbb4ae8 4912 int status;
1da177e4 4913
de734831 4914 /* nfs_client_id4 */
f092075d 4915 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4916 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4917 setclientid.sc_name_len =
4918 nfs4_init_uniform_client_string(clp,
4919 setclientid.sc_name,
4920 sizeof(setclientid.sc_name));
4921 else
4922 setclientid.sc_name_len =
4923 nfs4_init_nonuniform_client_string(clp,
4924 setclientid.sc_name,
4925 sizeof(setclientid.sc_name));
de734831 4926 /* cb_client4 */
e984a55a 4927 rcu_read_lock();
de734831 4928 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4929 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4930 rpc_peeraddr2str(clp->cl_rpcclient,
4931 RPC_DISPLAY_NETID));
de734831
CL		 4932 rcu_read_unlock();
4933 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4934 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4935 clp->cl_ipaddr, port >> 8, port & 255);
4936
6bbb4ae8
CL		 4937 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4938 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4939 setclientid.sc_name_len, setclientid.sc_name);
4940 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4941 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4942 dprintk("NFS reply setclientid: %d\n", status);
4943 return status;
1da177e4
LT		 4944}
4945
6bbb4ae8
CL		 4946/**
4947 * nfs4_proc_setclientid_confirm - Confirm client ID
4948 * @clp: state data structure
4949 * @res: result of a previous SETCLIENTID
4950 * @cred: RPC credential to use for this call
4951 *
4952 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4953 */
fd954ae1 4954int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4955 struct nfs4_setclientid_res *arg,
4956 struct rpc_cred *cred)
1da177e4 4957{
1da177e4
LT		 4958 struct rpc_message msg = {
4959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4960 .rpc_argp = arg,
286d7d6a 4961 .rpc_cred = cred,
1da177e4 4962 };
1da177e4
LT		 4963 int status;
4964
6bbb4ae8
CL		 4965 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4966 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4967 clp->cl_clientid);
1bd714f2 4968 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4969 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4970 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4971 return status;
4972}
4973
fe650407
TM		 4974struct nfs4_delegreturndata {
4975 struct nfs4_delegreturnargs args;
fa178f29 4976 struct nfs4_delegreturnres res;
fe650407
TM		 4977 struct nfs_fh fh;
4978 nfs4_stateid stateid;
26e976a8 4979 unsigned long timestamp;
fa178f29 4980 struct nfs_fattr fattr;
fe650407
TM		 4981 int rpc_status;
4982};
4983
fe650407
TM		 4984static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4985{
4986 struct nfs4_delegreturndata *data = calldata;
938e1010 4987
14516c3a
TM		 4988 if (!nfs4_sequence_done(task, &data->res.seq_res))
4989 return;
938e1010 4990
ca8acf8d 4991 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 4992 switch (task->tk_status) {
79708861 4993 case 0:
fa178f29 4994 renew_lease(data->res.server, data->timestamp);
79708861 4995 break;
c97cf606
TM		 4996 case -NFS4ERR_ADMIN_REVOKED:
4997 case -NFS4ERR_DELEG_REVOKED:
4998 case -NFS4ERR_BAD_STATEID:
4999 case -NFS4ERR_OLD_STATEID:
5000 case -NFS4ERR_STALE_STATEID:
5001 case -NFS4ERR_EXPIRED:
5002 task->tk_status = 0;
5003 break;
79708861
RL		 5004 default:
5005 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5006 -EAGAIN) {
d00c5d43 5007 rpc_restart_call_prepare(task);
79708861
RL		 5008 return;
5009 }
5010 }
5011 data->rpc_status = task->tk_status;
fe650407
TM		 5012}
5013
5014static void nfs4_delegreturn_release(void *calldata)
5015{
fe650407
TM		 5016 kfree(calldata);
5017}
5018
938e1010
AA		 5019static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5020{
5021 struct nfs4_delegreturndata *d_data;
5022
5023 d_data = (struct nfs4_delegreturndata *)data;
5024
d9afbd1b
TM		 5025 nfs4_setup_sequence(d_data->res.server,
5026 &d_data->args.seq_args,
5027 &d_data->res.seq_res,
5028 task);
938e1010 5029}
938e1010 5030
c8d149f3 5031static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5032 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5033 .rpc_call_done = nfs4_delegreturn_done,
5034 .rpc_release = nfs4_delegreturn_release,
5035};
5036
e6f81075 5037static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5038{
5039 struct nfs4_delegreturndata *data;
fa178f29 5040 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5041 struct rpc_task *task;
5138fde0
TM		 5042 struct rpc_message msg = {
5043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5044 .rpc_cred = cred,
5045 };
c970aa85
TM		 5046 struct rpc_task_setup task_setup_data = {
5047 .rpc_client = server->client,
5138fde0 5048 .rpc_message = &msg,
c970aa85
TM		 5049 .callback_ops = &nfs4_delegreturn_ops,
5050 .flags = RPC_TASK_ASYNC,
5051 };
e6f81075 5052 int status = 0;
fe650407 5053
8535b2be 5054 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5055 if (data == NULL)
5056 return -ENOMEM;
a9c92d6b 5057 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5058 data->args.fhandle = &data->fh;
5059 data->args.stateid = &data->stateid;
9e907fec 5060 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5061 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5062 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5063 data->res.fattr = &data->fattr;
5064 data->res.server = server;
5138fde0 5065 nfs_fattr_init(data->res.fattr);
26e976a8 5066 data->timestamp = jiffies;
fe650407
TM		 5067 data->rpc_status = 0;
5068
c970aa85 5069 task_setup_data.callback_data = data;
1174dd1f
TM		 5070 msg.rpc_argp = &data->args;
5071 msg.rpc_resp = &data->res;
c970aa85 5072 task = rpc_run_task(&task_setup_data);
7a1218a2 5073 if (IS_ERR(task))
fe650407 5074 return PTR_ERR(task);
e6f81075
TM		 5075 if (!issync)
5076 goto out;
fe650407 5077 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5078 if (status != 0)
5079 goto out;
5080 status = data->rpc_status;
e144cbcc
TM		 5081 if (status == 0)
5082 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5083 else
5084 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5085out:
e6b3c4db 5086 rpc_put_task(task);
fe650407 5087 return status;
1da177e4
LT		 5088}
5089
e6f81075 5090int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5091{
5092 struct nfs_server *server = NFS_SERVER(inode);
5093 struct nfs4_exception exception = { };
5094 int err;
5095 do {
e6f81075 5096 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5097 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5098 switch (err) {
5099 case -NFS4ERR_STALE_STATEID:
5100 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5101 case 0:
5102 return 0;
5103 }
5104 err = nfs4_handle_exception(server, err, &exception);
5105 } while (exception.retry);
5106 return err;
5107}
5108
5109#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5110#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5111
5112/*
5113 * sleep, with exponential backoff, and retry the LOCK operation.
5114 */
5115static unsigned long
5116nfs4_set_lock_task_retry(unsigned long timeout)
5117{
416ad3c9 5118 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5119 timeout <<= 1;
5120 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5121 return NFS4_LOCK_MAXTIMEOUT;
5122 return timeout;
5123}
5124
1da177e4
LT		 5125static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5126{
5127 struct inode *inode = state->inode;
5128 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5129 struct nfs_client *clp = server->nfs_client;
911d1aaf 5130 struct nfs_lockt_args arg = {
1da177e4 5131 .fh = NFS_FH(inode),
911d1aaf 5132 .fl = request,
1da177e4 5133 };
911d1aaf
TM		 5134 struct nfs_lockt_res res = {
5135 .denied = request,
1da177e4
LT		 5136 };
5137 struct rpc_message msg = {
5138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5139 .rpc_argp = &arg,
5140 .rpc_resp = &res,
5141 .rpc_cred = state->owner->so_cred,
5142 };
1da177e4
LT		 5143 struct nfs4_lock_state *lsp;
5144 int status;
5145
911d1aaf 5146 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5147 status = nfs4_set_lock_state(state, request);
5148 if (status != 0)
5149 goto out;
5150 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5151 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5152 arg.lock_owner.s_dev = server->s_dev;
7c513058 5153 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5154 switch (status) {
5155 case 0:
5156 request->fl_type = F_UNLCK;
5157 break;
5158 case -NFS4ERR_DENIED:
5159 status = 0;
1da177e4 5160 }
70cc6487 5161 request->fl_ops->fl_release_private(request);
a6f951dd 5162 request->fl_ops = NULL;
8d0a8a9d 5163out:
1da177e4
LT		 5164 return status;
5165}
5166
5167static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5168{
5169 struct nfs4_exception exception = { };
5170 int err;
5171
5172 do {
d1b748a5
TM		 5173 err = _nfs4_proc_getlk(state, cmd, request);
5174 trace_nfs4_get_lock(request, state, cmd, err);
5175 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5176 &exception);
5177 } while (exception.retry);
5178 return err;
5179}
5180
5181static int do_vfs_lock(struct file *file, struct file_lock *fl)
5182{
5183 int res = 0;
5184 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5185 case FL_POSIX:
5186 res = posix_lock_file_wait(file, fl);
5187 break;
5188 case FL_FLOCK:
5189 res = flock_lock_file_wait(file, fl);
5190 break;
5191 default:
5192 BUG();
5193 }
1da177e4
LT		 5194 return res;
5195}
5196
faf5f49c 5197struct nfs4_unlockdata {
911d1aaf
TM		 5198 struct nfs_locku_args arg;
5199 struct nfs_locku_res res;
faf5f49c
TM		 5200 struct nfs4_lock_state *lsp;
5201 struct nfs_open_context *ctx;
911d1aaf
TM		 5202 struct file_lock fl;
5203 const struct nfs_server *server;
26e976a8 5204 unsigned long timestamp;
faf5f49c
TM		 5205};
5206
911d1aaf
TM		 5207static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5208 struct nfs_open_context *ctx,
5209 struct nfs4_lock_state *lsp,
5210 struct nfs_seqid *seqid)
5211{
5212 struct nfs4_unlockdata *p;
5213 struct inode *inode = lsp->ls_state->inode;
5214
8535b2be 5215 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5216 if (p == NULL)
5217 return NULL;
5218 p->arg.fh = NFS_FH(inode);
5219 p->arg.fl = &p->fl;
5220 p->arg.seqid = seqid;
c1d51931 5221 p->res.seqid = seqid;
911d1aaf
TM		 5222 p->arg.stateid = &lsp->ls_stateid;
5223 p->lsp = lsp;
5224 atomic_inc(&lsp->ls_count);
5225 /* Ensure we don't close file until we're done freeing locks! */
5226 p->ctx = get_nfs_open_context(ctx);
5227 memcpy(&p->fl, fl, sizeof(p->fl));
5228 p->server = NFS_SERVER(inode);
5229 return p;
5230}
5231
06f814a3 5232static void nfs4_locku_release_calldata(void *data)
faf5f49c 5233{
963d8fe5 5234 struct nfs4_unlockdata *calldata = data;
911d1aaf 5235 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5236 nfs4_put_lock_state(calldata->lsp);
5237 put_nfs_open_context(calldata->ctx);
5238 kfree(calldata);
faf5f49c
TM		 5239}
5240
963d8fe5 5241static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5242{
963d8fe5 5243 struct nfs4_unlockdata *calldata = data;
faf5f49c 5244
14516c3a
TM		 5245 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5246 return;
faf5f49c
TM		 5247 switch (task->tk_status) {
5248 case 0:
f597c537
TM		 5249 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5250 &calldata->res.stateid);
26e976a8 5251 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5252 break;
9e33bed5
TM		 5253 case -NFS4ERR_BAD_STATEID:
5254 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5255 case -NFS4ERR_STALE_STATEID:
5256 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5257 break;
5258 default:
9e33bed5 5259 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5260 rpc_restart_call_prepare(task);
faf5f49c 5261 }
2b1bc308 5262 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5263}
5264
4ce70ada 5265static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5266{
4ce70ada 5267 struct nfs4_unlockdata *calldata = data;
faf5f49c 5268
911d1aaf 5269 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5270 goto out_wait;
795a88c9 5271 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5272 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5273 goto out_no_action;
faf5f49c 5274 }
26e976a8 5275 calldata->timestamp = jiffies;
035168ab 5276 if (nfs4_setup_sequence(calldata->server,
a893693c 5277 &calldata->arg.seq_args,
2240a9e2
TM		 5278 &calldata->res.seq_res,
5279 task) != 0)
5280 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5281 return;
5282out_no_action:
5283 task->tk_action = NULL;
5284out_wait:
5285 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5286}
5287
963d8fe5 5288static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5289 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5290 .rpc_call_done = nfs4_locku_done,
06f814a3 5291 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5292};
5293
a5d16a4d
TM		 5294static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5295 struct nfs_open_context *ctx,
5296 struct nfs4_lock_state *lsp,
5297 struct nfs_seqid *seqid)
5298{
5299 struct nfs4_unlockdata *data;
5138fde0
TM		 5300 struct rpc_message msg = {
5301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5302 .rpc_cred = ctx->cred,
5303 };
c970aa85
TM		 5304 struct rpc_task_setup task_setup_data = {
5305 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5306 .rpc_message = &msg,
c970aa85 5307 .callback_ops = &nfs4_locku_ops,
101070ca 5308 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5309 .flags = RPC_TASK_ASYNC,
5310 };
a5d16a4d 5311
fa940720
WAA		 5312 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5313 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5314
137d6aca
FF		 5315 /* Ensure this is an unlock - when canceling a lock, the
5316 * canceled lock is passed in, and it won't be an unlock.
5317 */
5318 fl->fl_type = F_UNLCK;
5319
a5d16a4d
TM		 5320 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5321 if (data == NULL) {
5322 nfs_free_seqid(seqid);
5323 return ERR_PTR(-ENOMEM);
5324 }
5325
a9c92d6b 5326 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5327 msg.rpc_argp = &data->arg;
5328 msg.rpc_resp = &data->res;
c970aa85
TM		 5329 task_setup_data.callback_data = data;
5330 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5331}
5332
faf5f49c
TM		 5333static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5334{
65b62a29
TM		 5335 struct inode *inode = state->inode;
5336 struct nfs4_state_owner *sp = state->owner;
5337 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5338 struct nfs_seqid *seqid;
1da177e4 5339 struct nfs4_lock_state *lsp;
06f814a3
TM		 5340 struct rpc_task *task;
5341 int status = 0;
536ff0f8 5342 unsigned char fl_flags = request->fl_flags;
faf5f49c 5343
8d0a8a9d 5344 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5345 /* Unlock _before_ we do the RPC call */
5346 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5347 /* Exclude nfs_delegation_claim_locks() */
5348 mutex_lock(&sp->so_delegreturn_mutex);
5349 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5350 down_read(&nfsi->rwsem);
5351 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5352 up_read(&nfsi->rwsem);
65b62a29 5353 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5354 goto out;
19e03c57
TM		 5355 }
5356 up_read(&nfsi->rwsem);
65b62a29 5357 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5358 if (status != 0)
9b073574
TM		 5359 goto out;
5360 /* Is this a delegated lock? */
8d0a8a9d 5361 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5362 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5363 goto out;
8535b2be 5364 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5365 status = -ENOMEM;
911d1aaf 5366 if (seqid == NULL)
9b073574 5367 goto out;
cd3758e3 5368 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5369 status = PTR_ERR(task);
5370 if (IS_ERR(task))
9b073574 5371 goto out;
a5d16a4d 5372 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5373 rpc_put_task(task);
9b073574 5374out:
536ff0f8 5375 request->fl_flags = fl_flags;
d1b748a5 5376 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5377 return status;
5378}
5379
a5d16a4d
TM		 5380struct nfs4_lockdata {
5381 struct nfs_lock_args arg;
5382 struct nfs_lock_res res;
5383 struct nfs4_lock_state *lsp;
5384 struct nfs_open_context *ctx;
5385 struct file_lock fl;
26e976a8 5386 unsigned long timestamp;
a5d16a4d
TM		 5387 int rpc_status;
5388 int cancelled;
66179efe 5389 struct nfs_server *server;
a5d16a4d
TM		 5390};
5391
5392static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5393 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5394 gfp_t gfp_mask)
1da177e4 5395{
a5d16a4d
TM		 5396 struct nfs4_lockdata *p;
5397 struct inode *inode = lsp->ls_state->inode;
1da177e4 5398 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5399
8535b2be 5400 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5401 if (p == NULL)
5402 return NULL;
5403
5404 p->arg.fh = NFS_FH(inode);
5405 p->arg.fl = &p->fl;
8535b2be 5406 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5407 if (p->arg.open_seqid == NULL)
5408 goto out_free;
8535b2be 5409 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5410 if (p->arg.lock_seqid == NULL)
2f74c0a0 5411 goto out_free_seqid;
a5d16a4d 5412 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5413 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5414 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5415 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5416 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5417 p->lsp = lsp;
66179efe 5418 p->server = server;
a5d16a4d
TM		 5419 atomic_inc(&lsp->ls_count);
5420 p->ctx = get_nfs_open_context(ctx);
5421 memcpy(&p->fl, fl, sizeof(p->fl));
5422 return p;
2f74c0a0
TM		 5423out_free_seqid:
5424 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5425out_free:
5426 kfree(p);
5427 return NULL;
5428}
5429
5430static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5431{
5432 struct nfs4_lockdata *data = calldata;
5433 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5434
3110ff80 5435 dprintk("%s: begin!\n", __func__);
2f74c0a0 5436 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5437 goto out_wait;
a5d16a4d
TM		 5438 /* Do we need to do an open_to_lock_owner? */
5439 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5440 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5441 goto out_release_lock_seqid;
8fe72bac 5442 }
8e472f33 5443 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5444 data->arg.new_lock_owner = 1;
c1d51931 5445 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5446 } else
5447 data->arg.new_lock_owner = 0;
5d422301
TM		 5448 if (!nfs4_valid_open_stateid(state)) {
5449 data->rpc_status = -EBADF;
5450 task->tk_action = NULL;
5451 goto out_release_open_seqid;
5452 }
26e976a8 5453 data->timestamp = jiffies;
035168ab
TM		 5454 if (nfs4_setup_sequence(data->server,
5455 &data->arg.seq_args,
2240a9e2 5456 &data->res.seq_res,
d9afbd1b 5457 task) == 0)
66179efe 5458 return;
5d422301 5459out_release_open_seqid:
2240a9e2
TM		 5460 nfs_release_seqid(data->arg.open_seqid);
5461out_release_lock_seqid:
5462 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5463out_wait:
5464 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5465 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5466}
5467
a5d16a4d
TM		 5468static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5469{
5470 struct nfs4_lockdata *data = calldata;
5471
3110ff80 5472 dprintk("%s: begin!\n", __func__);
a5d16a4d 5473
14516c3a
TM		 5474 if (!nfs4_sequence_done(task, &data->res.seq_res))
5475 return;
66179efe 5476
a5d16a4d 5477 data->rpc_status = task->tk_status;
a5d16a4d 5478 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5479 if (data->rpc_status == 0)
5480 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5481 else
5482 goto out;
5483 }
5484 if (data->rpc_status == 0) {
f597c537 5485 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5486 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5487 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5488 }
a5d16a4d 5489out:
3110ff80 5490 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5491}
5492
5493static void nfs4_lock_release(void *calldata)
5494{
5495 struct nfs4_lockdata *data = calldata;
5496
3110ff80 5497 dprintk("%s: begin!\n", __func__);
2f74c0a0 5498 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5499 if (data->cancelled != 0) {
5500 struct rpc_task *task;
5501 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5502 data->arg.lock_seqid);
5503 if (!IS_ERR(task))
bf294b41 5504 rpc_put_task_async(task);
3110ff80 5505 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5506 } else
5507 nfs_free_seqid(data->arg.lock_seqid);
5508 nfs4_put_lock_state(data->lsp);
5509 put_nfs_open_context(data->ctx);
5510 kfree(data);
3110ff80 5511 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5512}
5513
5514static const struct rpc_call_ops nfs4_lock_ops = {
5515 .rpc_call_prepare = nfs4_lock_prepare,
5516 .rpc_call_done = nfs4_lock_done,
5517 .rpc_release = nfs4_lock_release,
5518};
5519
2bee72a6
TM		 5520static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5521{
2bee72a6
TM		 5522 switch (error) {
5523 case -NFS4ERR_ADMIN_REVOKED:
5524 case -NFS4ERR_BAD_STATEID:
ecac799a 5525 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5526 if (new_lock_owner != 0 ||
795a88c9 5527 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5528 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5529 break;
5530 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5531 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5532 case -NFS4ERR_EXPIRED:
5533 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5534 };
5535}
5536
afe6c27c 5537static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5538{
5539 struct nfs4_lockdata *data;
5540 struct rpc_task *task;
5138fde0
TM		 5541 struct rpc_message msg = {
5542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5543 .rpc_cred = state->owner->so_cred,
5544 };
c970aa85
TM		 5545 struct rpc_task_setup task_setup_data = {
5546 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5547 .rpc_message = &msg,
c970aa85 5548 .callback_ops = &nfs4_lock_ops,
101070ca 5549 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5550 .flags = RPC_TASK_ASYNC,
5551 };
a5d16a4d
TM		 5552 int ret;
5553
3110ff80 5554 dprintk("%s: begin!\n", __func__);
cd3758e3 5555 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5556 fl->fl_u.nfs4_fl.owner,
5557 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5558 if (data == NULL)
5559 return -ENOMEM;
5560 if (IS_SETLKW(cmd))
5561 data->arg.block = 1;
a9c92d6b 5562 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5563 msg.rpc_argp = &data->arg;
5564 msg.rpc_resp = &data->res;
c970aa85 5565 task_setup_data.callback_data = data;
8fe72bac
TM		 5566 if (recovery_type > NFS_LOCK_NEW) {
5567 if (recovery_type == NFS_LOCK_RECLAIM)
5568 data->arg.reclaim = NFS_LOCK_RECLAIM;
5569 nfs4_set_sequence_privileged(&data->arg.seq_args);
5570 }
c970aa85 5571 task = rpc_run_task(&task_setup_data);
7a1218a2 5572 if (IS_ERR(task))
a5d16a4d 5573 return PTR_ERR(task);
a5d16a4d
TM		 5574 ret = nfs4_wait_for_completion_rpc_task(task);
5575 if (ret == 0) {
5576 ret = data->rpc_status;
2bee72a6
TM		 5577 if (ret)
5578 nfs4_handle_setlk_error(data->server, data->lsp,
5579 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5580 } else
5581 data->cancelled = 1;
e6b3c4db 5582 rpc_put_task(task);
3110ff80 5583 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5584 return ret;
1da177e4
LT		 5585}
5586
5587static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5588{
202b50dc 5589 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5590 struct nfs4_exception exception = {
5591 .inode = state->inode,
5592 };
202b50dc
TM		 5593 int err;
5594
5595 do {
42a2d13e
TM		 5596 /* Cache the lock if possible... */
5597 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5598 return 0;
afe6c27c 5599 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5600 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5601 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5602 break;
5603 nfs4_handle_exception(server, err, &exception);
5604 } while (exception.retry);
5605 return err;
1da177e4
LT		 5606}
5607
5608static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5609{
202b50dc 5610 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5611 struct nfs4_exception exception = {
5612 .inode = state->inode,
5613 };
202b50dc
TM		 5614 int err;
5615
6bfc93ef
TM		 5616 err = nfs4_set_lock_state(state, request);
5617 if (err != 0)
5618 return err;
f6de7a39 5619 if (!recover_lost_locks) {
ef1820f9
N		 5620 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5621 return 0;
5622 }
202b50dc 5623 do {
42a2d13e
TM		 5624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5625 return 0;
afe6c27c 5626 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5627 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5628 switch (err) {
5629 default:
5630 goto out;
5631 case -NFS4ERR_GRACE:
5632 case -NFS4ERR_DELAY:
5633 nfs4_handle_exception(server, err, &exception);
5634 err = 0;
5635 }
202b50dc 5636 } while (exception.retry);
a9ed2e25 5637out:
202b50dc 5638 return err;
1da177e4
LT		 5639}
5640
f062eb6c 5641#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5642/**
5643 * nfs41_check_expired_locks - possibly free a lock stateid
5644 *
5645 * @state: NFSv4 state for an inode
5646 *
5647 * Returns NFS_OK if recovery for this stateid is now finished.
5648 * Otherwise a negative NFS4ERR value is returned.
5649 */
b01dd1d8 5650static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5651{
eb64cf96 5652 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5653 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5654 struct nfs_server *server = NFS_SERVER(state->inode);
5655
b01dd1d8 5656 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5657 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5658 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5659
5660 status = nfs41_test_stateid(server,
5661 &lsp->ls_stateid,
5662 cred);
08cb47fa 5663 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5664 if (status != NFS_OK) {
3e60ffdd
CL		 5665 /* Free the stateid unless the server
5666 * informs us the stateid is unrecognized. */
89af2739
CL		 5667 if (status != -NFS4ERR_BAD_STATEID)
5668 nfs41_free_stateid(server,
ab7cb0df
TM		 5669 &lsp->ls_stateid,
5670 cred);
795a88c9 5671 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5672 ret = status;
5673 }
5674 }
5675 };
5676
5677 return ret;
5678}
5679
5680static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5681{
5682 int status = NFS_OK;
5683
5684 if (test_bit(LK_STATE_IN_USE, &state->flags))
5685 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5686 if (status != NFS_OK)
5687 status = nfs4_lock_expired(state, request);
5688 return status;
f062eb6c
BS		 5689}
5690#endif
5691
1da177e4
LT		 5692static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5693{
9a99af49 5694 struct nfs4_state_owner *sp = state->owner;
19e03c57 5695 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5696 unsigned char fl_flags = request->fl_flags;
9a99af49 5697 unsigned int seq;
8e469ebd 5698 int status = -ENOLCK;
1da177e4 5699
8e469ebd
TM		 5700 if ((fl_flags & FL_POSIX) &&
5701 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5702 goto out;
6bfc93ef 5703 /* Is this a delegated open? */
6bfc93ef
TM		 5704 status = nfs4_set_lock_state(state, request);
5705 if (status != 0)
5706 goto out;
01c3b861
TM		 5707 request->fl_flags |= FL_ACCESS;
5708 status = do_vfs_lock(request->fl_file, request);
5709 if (status < 0)
5710 goto out;
19e03c57 5711 down_read(&nfsi->rwsem);
01c3b861 5712 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5713 /* Yes: cache locks! */
01c3b861 5714 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5715 request->fl_flags = fl_flags & ~FL_SLEEP;
5716 status = do_vfs_lock(request->fl_file, request);
5717 goto out_unlock;
01c3b861 5718 }
9a99af49
TM		 5719 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5720 up_read(&nfsi->rwsem);
afe6c27c 5721 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5722 if (status != 0)
9a99af49
TM		 5723 goto out;
5724 down_read(&nfsi->rwsem);
5725 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5726 status = -NFS4ERR_DELAY;
01c3b861 5727 goto out_unlock;
9a99af49 5728 }
6bfc93ef 5729 /* Note: we always want to sleep here! */
01c3b861 5730 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5731 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5732 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5733 "manager!\n", __func__);
01c3b861 5734out_unlock:
19e03c57 5735 up_read(&nfsi->rwsem);
01c3b861
TM		 5736out:
5737 request->fl_flags = fl_flags;
1da177e4
LT		 5738 return status;
5739}
5740
5741static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5742{
a1d0b5ee
TM		 5743 struct nfs4_exception exception = {
5744 .state = state,
05ffe24f 5745 .inode = state->inode,
a1d0b5ee 5746 };
1da177e4
LT		 5747 int err;
5748
5749 do {
965b5d67 5750 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5751 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5752 if (err == -NFS4ERR_DENIED)
5753 err = -EAGAIN;
1da177e4 5754 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5755 err, &exception);
1da177e4
LT		 5756 } while (exception.retry);
5757 return err;
5758}
5759
5760static int
5761nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5762{
5763 struct nfs_open_context *ctx;
5764 struct nfs4_state *state;
5765 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5766 int status;
5767
5768 /* verify open state */
cd3758e3 5769 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5770 state = ctx->state;
5771
5772 if (request->fl_start < 0 || request->fl_end < 0)
5773 return -EINVAL;
5774
d953126a
TM		 5775 if (IS_GETLK(cmd)) {
5776 if (state != NULL)
5777 return nfs4_proc_getlk(state, F_GETLK, request);
5778 return 0;
5779 }
1da177e4
LT		 5780
5781 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5782 return -EINVAL;
5783
d953126a
TM		 5784 if (request->fl_type == F_UNLCK) {
5785 if (state != NULL)
5786 return nfs4_proc_unlck(state, cmd, request);
5787 return 0;
5788 }
1da177e4 5789
d953126a
TM		 5790 if (state == NULL)
5791 return -ENOLCK;
55725513
TM		 5792 /*
5793 * Don't rely on the VFS having checked the file open mode,
5794 * since it won't do this for flock() locks.
5795 */
f44106e2 5796 switch (request->fl_type) {
55725513
TM		 5797 case F_RDLCK:
5798 if (!(filp->f_mode & FMODE_READ))
5799 return -EBADF;
5800 break;
5801 case F_WRLCK:
5802 if (!(filp->f_mode & FMODE_WRITE))
5803 return -EBADF;
5804 }
5805
1da177e4
LT		 5806 do {
5807 status = nfs4_proc_setlk(state, cmd, request);
5808 if ((status != -EAGAIN) || IS_SETLK(cmd))
5809 break;
5810 timeout = nfs4_set_lock_task_retry(timeout);
5811 status = -ERESTARTSYS;
5812 if (signalled())
5813 break;
5814 } while(status < 0);
1da177e4
LT		 5815 return status;
5816}
5817
db4f2e63 5818int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5819{
5820 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5821 int err;
5822
5823 err = nfs4_set_lock_state(state, fl);
5824 if (err != 0)
db4f2e63 5825 return err;
4a706fa0 5826 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5827 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5828}
6b3b5496 5829
cf470c3e
TM		 5830struct nfs_release_lockowner_data {
5831 struct nfs4_lock_state *lsp;
5ae67c4f 5832 struct nfs_server *server;
cf470c3e 5833 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5834 struct nfs4_sequence_args seq_args;
5835 struct nfs4_sequence_res seq_res;
60ea6812 5836 unsigned long timestamp;
cf470c3e
TM		 5837};
5838
fbd4bfd1
CL		 5839static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5840{
5841 struct nfs_release_lockowner_data *data = calldata;
5842 nfs40_setup_sequence(data->server,
5843 &data->seq_args, &data->seq_res, task);
60ea6812 5844 data->timestamp = jiffies;
fbd4bfd1
CL		 5845}
5846
5847static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5848{
5849 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5850 struct nfs_server *server = data->server;
5851
fbd4bfd1 5852 nfs40_sequence_done(task, &data->seq_res);
60ea6812
CL		 5853
5854 switch (task->tk_status) {
5855 case 0:
5856 renew_lease(server, data->timestamp);
5857 break;
5858 case -NFS4ERR_STALE_CLIENTID:
5859 case -NFS4ERR_EXPIRED:
5860 case -NFS4ERR_LEASE_MOVED:
5861 case -NFS4ERR_DELAY:
5862 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5863 rpc_restart_call_prepare(task);
5864 }
fbd4bfd1
CL		 5865}
5866
d3c7b7cc
TM		 5867static void nfs4_release_lockowner_release(void *calldata)
5868{
cf470c3e 5869 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5870 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5871 kfree(calldata);
5872}
5873
17280175 5874static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5875 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5876 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5877 .rpc_release = nfs4_release_lockowner_release,
5878};
5879
c8b2d0bf 5880static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5881{
cf470c3e 5882 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5883 struct rpc_message msg = {
5884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5885 };
5886
5887 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5888 return -EINVAL;
fbd4bfd1 5889
cf470c3e
TM		 5890 data = kmalloc(sizeof(*data), GFP_NOFS);
5891 if (!data)
5892 return -ENOMEM;
fbd4bfd1 5893 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5894 data->lsp = lsp;
5ae67c4f 5895 data->server = server;
cf470c3e
TM		 5896 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5897 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5898 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5899
cf470c3e
TM		 5900 msg.rpc_argp = &data->args;
5901 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5902 return 0;
d3c7b7cc
TM		 5903}
5904
aa1870af
BF		 5905#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5906
64c2ce8b
AK		 5907static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5908 const void *buf, size_t buflen,
5909 int flags, int type)
6b3b5496 5910{
64c2ce8b
AK		 5911 if (strcmp(key, "") != 0)
5912 return -EINVAL;
4b580ee3 5913
64c2ce8b 5914 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5915}
5916
64c2ce8b
AK		 5917static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5918 void *buf, size_t buflen, int type)
6b3b5496 5919{
64c2ce8b
AK		 5920 if (strcmp(key, "") != 0)
5921 return -EINVAL;
aa1870af 5922
64c2ce8b 5923 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5924}
5925
64c2ce8b
AK		 5926static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5927 size_t list_len, const char *name,
5928 size_t name_len, int type)
6b3b5496 5929{
64c2ce8b 5930 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5931
096455a2
BF		 5932 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5933 return 0;
64c2ce8b
AK		 5934
5935 if (list && len <= list_len)
5936 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5937 return len;
6b3b5496
BF		 5938}
5939
c9bccef6
DQ		 5940#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5941static inline int nfs4_server_supports_labels(struct nfs_server *server)
5942{
5943 return server->caps & NFS_CAP_SECURITY_LABEL;
5944}
5945
5946static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5947 const void *buf, size_t buflen,
5948 int flags, int type)
5949{
5950 if (security_ismaclabel(key))
5951 return nfs4_set_security_label(dentry, buf, buflen);
5952
5953 return -EOPNOTSUPP;
5954}
5955
5956static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5957 void *buf, size_t buflen, int type)
5958{
5959 if (security_ismaclabel(key))
5960 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5961 return -EOPNOTSUPP;
5962}
5963
5964static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5965 size_t list_len, const char *name,
5966 size_t name_len, int type)
5967{
5968 size_t len = 0;
5969
5970 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5971 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5972 if (list && len <= list_len)
5973 security_inode_listsecurity(dentry->d_inode, list, len);
5974 }
5975 return len;
5976}
5977
5978static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5979 .prefix = XATTR_SECURITY_PREFIX,
5980 .list = nfs4_xattr_list_nfs4_label,
5981 .get = nfs4_xattr_get_nfs4_label,
5982 .set = nfs4_xattr_set_nfs4_label,
5983};
5984#endif
5985
5986
533eb461
AA		 5987/*
5988 * nfs_fhget will use either the mounted_on_fileid or the fileid
5989 */
69aaaae1
TM		 5990static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5991{
533eb461
AA		 5992 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5993 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5994 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5995 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5996 return;
5997
5998 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5999 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6000 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6001 fattr->nlink = 2;
6002}
6003
f05d147f
BS		 6004static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6005 const struct qstr *name,
6006 struct nfs4_fs_locations *fs_locations,
6007 struct page *page)
683b57b4
TM		 6008{
6009 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6010 u32 bitmask[3] = {
361e624f 6011 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6012 };
6013 struct nfs4_fs_locations_arg args = {
6014 .dir_fh = NFS_FH(dir),
c228fd3a 6015 .name = name,
683b57b4
TM		 6016 .page = page,
6017 .bitmask = bitmask,
6018 };
22958463
BH		 6019 struct nfs4_fs_locations_res res = {
6020 .fs_locations = fs_locations,
6021 };
683b57b4
TM		 6022 struct rpc_message msg = {
6023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6024 .rpc_argp = &args,
22958463 6025 .rpc_resp = &res,
683b57b4
TM		 6026 };
6027 int status;
6028
3110ff80 6029 dprintk("%s: start\n", __func__);
533eb461
AA		 6030
6031 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6032 * is not supported */
6033 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6034 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6035 else
6036 bitmask[0] |= FATTR4_WORD0_FILEID;
6037
c228fd3a 6038 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6039 fs_locations->server = server;
830b8e33 6040 fs_locations->nlocations = 0;
f05d147f 6041 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6042 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6043 return status;
6044}
6045
f05d147f
BS		 6046int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6047 const struct qstr *name,
6048 struct nfs4_fs_locations *fs_locations,
6049 struct page *page)
db0a9593
BS		 6050{
6051 struct nfs4_exception exception = { };
6052 int err;
6053 do {
078ea3df
TM		 6054 err = _nfs4_proc_fs_locations(client, dir, name,
6055 fs_locations, page);
6056 trace_nfs4_get_fs_locations(dir, name, err);
6057 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6058 &exception);
6059 } while (exception.retry);
6060 return err;
6061}
6062
b03d735b
CL		 6063/*
6064 * This operation also signals the server that this client is
6065 * performing migration recovery. The server can stop returning
6066 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6067 * appended to this compound to identify the client ID which is
6068 * performing recovery.
6069 */
6070static int _nfs40_proc_get_locations(struct inode *inode,
6071 struct nfs4_fs_locations *locations,
6072 struct page *page, struct rpc_cred *cred)
6073{
6074 struct nfs_server *server = NFS_SERVER(inode);
6075 struct rpc_clnt *clnt = server->client;
6076 u32 bitmask[2] = {
6077 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6078 };
6079 struct nfs4_fs_locations_arg args = {
6080 .clientid = server->nfs_client->cl_clientid,
6081 .fh = NFS_FH(inode),
6082 .page = page,
6083 .bitmask = bitmask,
6084 .migration = 1, /* skip LOOKUP */
6085 .renew = 1, /* append RENEW */
6086 };
6087 struct nfs4_fs_locations_res res = {
6088 .fs_locations = locations,
6089 .migration = 1,
6090 .renew = 1,
6091 };
6092 struct rpc_message msg = {
6093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6094 .rpc_argp = &args,
6095 .rpc_resp = &res,
6096 .rpc_cred = cred,
6097 };
6098 unsigned long now = jiffies;
6099 int status;
6100
6101 nfs_fattr_init(&locations->fattr);
6102 locations->server = server;
6103 locations->nlocations = 0;
6104
6105 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6106 nfs4_set_sequence_privileged(&args.seq_args);
6107 status = nfs4_call_sync_sequence(clnt, server, &msg,
6108 &args.seq_args, &res.seq_res);
6109 if (status)
6110 return status;
6111
6112 renew_lease(server, now);
6113 return 0;
6114}
6115
6116#ifdef CONFIG_NFS_V4_1
6117
6118/*
6119 * This operation also signals the server that this client is
6120 * performing migration recovery. The server can stop asserting
6121 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6122 * performing this operation is identified in the SEQUENCE
6123 * operation in this compound.
6124 *
6125 * When the client supports GETATTR(fs_locations_info), it can
6126 * be plumbed in here.
6127 */
6128static int _nfs41_proc_get_locations(struct inode *inode,
6129 struct nfs4_fs_locations *locations,
6130 struct page *page, struct rpc_cred *cred)
6131{
6132 struct nfs_server *server = NFS_SERVER(inode);
6133 struct rpc_clnt *clnt = server->client;
6134 u32 bitmask[2] = {
6135 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6136 };
6137 struct nfs4_fs_locations_arg args = {
6138 .fh = NFS_FH(inode),
6139 .page = page,
6140 .bitmask = bitmask,
6141 .migration = 1, /* skip LOOKUP */
6142 };
6143 struct nfs4_fs_locations_res res = {
6144 .fs_locations = locations,
6145 .migration = 1,
6146 };
6147 struct rpc_message msg = {
6148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6149 .rpc_argp = &args,
6150 .rpc_resp = &res,
6151 .rpc_cred = cred,
6152 };
6153 int status;
6154
6155 nfs_fattr_init(&locations->fattr);
6156 locations->server = server;
6157 locations->nlocations = 0;
6158
6159 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6160 nfs4_set_sequence_privileged(&args.seq_args);
6161 status = nfs4_call_sync_sequence(clnt, server, &msg,
6162 &args.seq_args, &res.seq_res);
6163 if (status == NFS4_OK &&
6164 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6165 status = -NFS4ERR_LEASE_MOVED;
6166 return status;
6167}
6168
6169#endif /* CONFIG_NFS_V4_1 */
6170
6171/**
6172 * nfs4_proc_get_locations - discover locations for a migrated FSID
6173 * @inode: inode on FSID that is migrating
6174 * @locations: result of query
6175 * @page: buffer
6176 * @cred: credential to use for this operation
6177 *
6178 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6179 * operation failed, or a negative errno if a local error occurred.
6180 *
6181 * On success, "locations" is filled in, but if the server has
6182 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6183 * asserted.
6184 *
6185 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6186 * from this client that require migration recovery.
6187 */
6188int nfs4_proc_get_locations(struct inode *inode,
6189 struct nfs4_fs_locations *locations,
6190 struct page *page, struct rpc_cred *cred)
6191{
6192 struct nfs_server *server = NFS_SERVER(inode);
6193 struct nfs_client *clp = server->nfs_client;
6194 const struct nfs4_mig_recovery_ops *ops =
6195 clp->cl_mvops->mig_recovery_ops;
6196 struct nfs4_exception exception = { };
6197 int status;
6198
6199 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6200 (unsigned long long)server->fsid.major,
6201 (unsigned long long)server->fsid.minor,
6202 clp->cl_hostname);
6203 nfs_display_fhandle(NFS_FH(inode), __func__);
6204
6205 do {
6206 status = ops->get_locations(inode, locations, page, cred);
6207 if (status != -NFS4ERR_DELAY)
6208 break;
6209 nfs4_handle_exception(server, status, &exception);
6210 } while (exception.retry);
6211 return status;
6212}
6213
44c99933
CL		 6214/*
6215 * This operation also signals the server that this client is
6216 * performing "lease moved" recovery. The server can stop
6217 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6218 * is appended to this compound to identify the client ID which is
6219 * performing recovery.
6220 */
6221static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6222{
6223 struct nfs_server *server = NFS_SERVER(inode);
6224 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6225 struct rpc_clnt *clnt = server->client;
6226 struct nfs4_fsid_present_arg args = {
6227 .fh = NFS_FH(inode),
6228 .clientid = clp->cl_clientid,
6229 .renew = 1, /* append RENEW */
6230 };
6231 struct nfs4_fsid_present_res res = {
6232 .renew = 1,
6233 };
6234 struct rpc_message msg = {
6235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6236 .rpc_argp = &args,
6237 .rpc_resp = &res,
6238 .rpc_cred = cred,
6239 };
6240 unsigned long now = jiffies;
6241 int status;
6242
6243 res.fh = nfs_alloc_fhandle();
6244 if (res.fh == NULL)
6245 return -ENOMEM;
6246
6247 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6248 nfs4_set_sequence_privileged(&args.seq_args);
6249 status = nfs4_call_sync_sequence(clnt, server, &msg,
6250 &args.seq_args, &res.seq_res);
6251 nfs_free_fhandle(res.fh);
6252 if (status)
6253 return status;
6254
6255 do_renew_lease(clp, now);
6256 return 0;
6257}
6258
6259#ifdef CONFIG_NFS_V4_1
6260
6261/*
6262 * This operation also signals the server that this client is
6263 * performing "lease moved" recovery. The server can stop asserting
6264 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6265 * this operation is identified in the SEQUENCE operation in this
6266 * compound.
6267 */
6268static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6269{
6270 struct nfs_server *server = NFS_SERVER(inode);
6271 struct rpc_clnt *clnt = server->client;
6272 struct nfs4_fsid_present_arg args = {
6273 .fh = NFS_FH(inode),
6274 };
6275 struct nfs4_fsid_present_res res = {
6276 };
6277 struct rpc_message msg = {
6278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6279 .rpc_argp = &args,
6280 .rpc_resp = &res,
6281 .rpc_cred = cred,
6282 };
6283 int status;
6284
6285 res.fh = nfs_alloc_fhandle();
6286 if (res.fh == NULL)
6287 return -ENOMEM;
6288
6289 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6290 nfs4_set_sequence_privileged(&args.seq_args);
6291 status = nfs4_call_sync_sequence(clnt, server, &msg,
6292 &args.seq_args, &res.seq_res);
6293 nfs_free_fhandle(res.fh);
6294 if (status == NFS4_OK &&
6295 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6296 status = -NFS4ERR_LEASE_MOVED;
6297 return status;
6298}
6299
6300#endif /* CONFIG_NFS_V4_1 */
6301
6302/**
6303 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6304 * @inode: inode on FSID to check
6305 * @cred: credential to use for this operation
6306 *
6307 * Server indicates whether the FSID is present, moved, or not
6308 * recognized. This operation is necessary to clear a LEASE_MOVED
6309 * condition for this client ID.
6310 *
6311 * Returns NFS4_OK if the FSID is present on this server,
6312 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6313 * NFS4ERR code if some error occurred on the server, or a
6314 * negative errno if a local failure occurred.
6315 */
6316int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6317{
6318 struct nfs_server *server = NFS_SERVER(inode);
6319 struct nfs_client *clp = server->nfs_client;
6320 const struct nfs4_mig_recovery_ops *ops =
6321 clp->cl_mvops->mig_recovery_ops;
6322 struct nfs4_exception exception = { };
6323 int status;
6324
6325 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6326 (unsigned long long)server->fsid.major,
6327 (unsigned long long)server->fsid.minor,
6328 clp->cl_hostname);
6329 nfs_display_fhandle(NFS_FH(inode), __func__);
6330
6331 do {
6332 status = ops->fsid_present(inode, cred);
6333 if (status != -NFS4ERR_DELAY)
6334 break;
6335 nfs4_handle_exception(server, status, &exception);
6336 } while (exception.retry);
6337 return status;
6338}
6339
5ec16a85 6340/**
a5250def
WAA		 6341 * If 'use_integrity' is true and the state managment nfs_client
6342 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6343 * and the machine credential as per RFC3530bis and RFC5661 Security
6344 * Considerations sections. Otherwise, just use the user cred with the
6345 * filesystem's rpc_client.
5ec16a85 6346 */
a5250def 6347static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6348{
6349 int status;
6350 struct nfs4_secinfo_arg args = {
6351 .dir_fh = NFS_FH(dir),
6352 .name = name,
6353 };
6354 struct nfs4_secinfo_res res = {
6355 .flavors = flavors,
6356 };
6357 struct rpc_message msg = {
6358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6359 .rpc_argp = &args,
6360 .rpc_resp = &res,
6361 };
a5250def 6362 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6363 struct rpc_cred *cred = NULL;
a5250def
WAA		 6364
6365 if (use_integrity) {
6366 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6367 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6368 msg.rpc_cred = cred;
a5250def 6369 }
5a5ea0d4
BS		 6370
6371 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6372
6373 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6374 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6375
a5250def
WAA		 6376 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6377 &res.seq_res, 0);
5a5ea0d4 6378 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6379
7cb852df
WAA		 6380 if (cred)
6381 put_rpccred(cred);
a5250def 6382
5a5ea0d4
BS		 6383 return status;
6384}
6385
72de53ec
BS		 6386int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6387 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6388{
6389 struct nfs4_exception exception = { };
6390 int err;
6391 do {
a5250def
WAA		 6392 err = -NFS4ERR_WRONGSEC;
6393
6394 /* try to use integrity protection with machine cred */
6395 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6396 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6397
6398 /*
6399 * if unable to use integrity protection, or SECINFO with
6400 * integrity protection returns NFS4ERR_WRONGSEC (which is
6401 * disallowed by spec, but exists in deployed servers) use
6402 * the current filesystem's rpc_client and the user cred.
6403 */
6404 if (err == -NFS4ERR_WRONGSEC)
6405 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6406
078ea3df
TM		 6407 trace_nfs4_secinfo(dir, name, err);
6408 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6409 &exception);
6410 } while (exception.retry);
6411 return err;
6412}
6413
557134a3 6414#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6415/*
6416 * Check the exchange flags returned by the server for invalid flags, having
6417 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6418 * DS flags set.
6419 */
6420static int nfs4_check_cl_exchange_flags(u32 flags)
6421{
6422 if (flags & ~EXCHGID4_FLAG_MASK_R)
6423 goto out_inval;
6424 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6425 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6426 goto out_inval;
6427 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6428 goto out_inval;
6429 return NFS_OK;
6430out_inval:
6431 return -NFS4ERR_INVAL;
6432}
6433
78fe0f41 6434static bool
79d4e1f0
CL		 6435nfs41_same_server_scope(struct nfs41_server_scope *a,
6436 struct nfs41_server_scope *b)
78fe0f41
WAA		 6437{
6438 if (a->server_scope_sz == b->server_scope_sz &&
6439 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6440 return true;
6441
6442 return false;
6443}
6444
7c44f1ae
WAA		 6445/*
6446 * nfs4_proc_bind_conn_to_session()
6447 *
6448 * The 4.1 client currently uses the same TCP connection for the
6449 * fore and backchannel.
6450 */
2cf047c9 6451int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6452{
6453 int status;
6454 struct nfs41_bind_conn_to_session_res res;
6455 struct rpc_message msg = {
6456 .rpc_proc =
6457 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6458 .rpc_argp = clp,
6459 .rpc_resp = &res,
2cf047c9 6460 .rpc_cred = cred,
7c44f1ae
WAA		 6461 };
6462
6463 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6464
6465 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6466 if (unlikely(res.session == NULL)) {
6467 status = -ENOMEM;
6468 goto out;
6469 }
6470
6471 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6472 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6473 if (status == 0) {
6474 if (memcmp(res.session->sess_id.data,
6475 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6476 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6477 status = -EIO;
6478 goto out_session;
6479 }
6480 if (res.dir != NFS4_CDFS4_BOTH) {
6481 dprintk("NFS: %s: Unexpected direction from server\n",
6482 __func__);
6483 status = -EIO;
6484 goto out_session;
6485 }
6486 if (res.use_conn_in_rdma_mode) {
6487 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6488 __func__);
6489 status = -EIO;
6490 goto out_session;
6491 }
6492 }
6493out_session:
6494 kfree(res.session);
6495out:
6496 dprintk("<-- %s status= %d\n", __func__, status);
6497 return status;
6498}
6499
99fe60d0 6500/*
fa940720
WAA		 6501 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6502 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6503 */
6504static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6505 .how = SP4_MACH_CRED,
6506 .enforce.u.words = {
6507 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6508 1 << (OP_EXCHANGE_ID - 32) |
6509 1 << (OP_CREATE_SESSION - 32) |
6510 1 << (OP_DESTROY_SESSION - 32) |
6511 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6512 },
6513 .allow.u.words = {
6514 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6515 1 << (OP_LOCKU) |
6516 1 << (OP_COMMIT),
8b5bee2e 6517 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6518 1 << (OP_SECINFO_NO_NAME - 32) |
6519 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6520 1 << (OP_FREE_STATEID - 32) |
6521 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6522 }
6523};
6524
6525/*
6526 * Select the state protection mode for client `clp' given the server results
6527 * from exchange_id in `sp'.
99fe60d0 6528 *
2031cd1a
WAA		 6529 * Returns 0 on success, negative errno otherwise.
6530 */
6531static int nfs4_sp4_select_mode(struct nfs_client *clp,
6532 struct nfs41_state_protection *sp)
6533{
6534 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6535 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6536 1 << (OP_EXCHANGE_ID - 32) |
6537 1 << (OP_CREATE_SESSION - 32) |
6538 1 << (OP_DESTROY_SESSION - 32) |
6539 1 << (OP_DESTROY_CLIENTID - 32)
6540 };
6541 unsigned int i;
6542
6543 if (sp->how == SP4_MACH_CRED) {
6544 /* Print state protect result */
6545 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6546 for (i = 0; i <= LAST_NFS4_OP; i++) {
6547 if (test_bit(i, sp->enforce.u.longs))
6548 dfprintk(MOUNT, " enforce op %d\n", i);
6549 if (test_bit(i, sp->allow.u.longs))
6550 dfprintk(MOUNT, " allow op %d\n", i);
6551 }
6552
6553 /* make sure nothing is on enforce list that isn't supported */
6554 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6555 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6556 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6557 return -EINVAL;
6558 }
6559 }
6560
6561 /*
6562 * Minimal mode - state operations are allowed to use machine
6563 * credential. Note this already happens by default, so the
6564 * client doesn't have to do anything more than the negotiation.
6565 *
6566 * NOTE: we don't care if EXCHANGE_ID is in the list -
6567 * we're already using the machine cred for exchange_id
6568 * and will never use a different cred.
6569 */
6570 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6571 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6572 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6573 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6574 dfprintk(MOUNT, "sp4_mach_cred:\n");
6575 dfprintk(MOUNT, " minimal mode enabled\n");
6576 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6577 } else {
6578 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6579 return -EINVAL;
6580 }
fa940720
WAA		 6581
6582 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6583 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6584 dfprintk(MOUNT, " cleanup mode enabled\n");
6585 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6586 }
8b5bee2e
WAA		 6587
6588 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6589 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6590 dfprintk(MOUNT, " secinfo mode enabled\n");
6591 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6592 }
3787d506
WAA		 6593
6594 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6595 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6596 dfprintk(MOUNT, " stateid mode enabled\n");
6597 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6598 }
8c21c62c
WAA		 6599
6600 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6601 dfprintk(MOUNT, " write mode enabled\n");
6602 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6603 }
6604
6605 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6606 dfprintk(MOUNT, " commit mode enabled\n");
6607 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6608 }
2031cd1a
WAA		 6609 }
6610
6611 return 0;
6612}
6613
6614/*
6615 * _nfs4_proc_exchange_id()
6bbb4ae8 6616 *
2031cd1a 6617 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6618 */
2031cd1a
WAA		 6619static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6620 u32 sp4_how)
99fe60d0
BH		 6621{
6622 nfs4_verifier verifier;
6623 struct nfs41_exchange_id_args args = {
cd93710e 6624 .verifier = &verifier,
99fe60d0 6625 .client = clp,
cd3fadec 6626#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6627 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6628 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6629 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6630#else
6631 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6632 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6633#endif
99fe60d0
BH		 6634 };
6635 struct nfs41_exchange_id_res res = {
32b01310 6636 0
99fe60d0
BH		 6637 };
6638 int status;
6639 struct rpc_message msg = {
6640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6641 .rpc_argp = &args,
6642 .rpc_resp = &res,
6643 .rpc_cred = cred,
6644 };
99fe60d0 6645
f092075d 6646 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6647 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6648 sizeof(args.id));
6bbb4ae8
CL		 6649 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6650 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6651 args.id_len, args.id);
99fe60d0 6652
acdeb69d 6653 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6654 GFP_NOFS);
acdeb69d 6655 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6656 status = -ENOMEM;
6657 goto out;
6658 }
78fe0f41 6659
79d4e1f0 6660 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6661 GFP_NOFS);
177313f1 6662 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6663 status = -ENOMEM;
acdeb69d 6664 goto out_server_owner;
abe9a6d5 6665 }
78fe0f41 6666
bbafffd2 6667 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6668 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6669 status = -ENOMEM;
6670 goto out_server_scope;
6671 }
6672
2031cd1a
WAA		 6673 switch (sp4_how) {
6674 case SP4_NONE:
6675 args.state_protect.how = SP4_NONE;
6676 break;
6677
6678 case SP4_MACH_CRED:
6679 args.state_protect = nfs4_sp4_mach_cred_request;
6680 break;
6681
6682 default:
6683 /* unsupported! */
6684 WARN_ON_ONCE(1);
6685 status = -EINVAL;
6686 goto out_server_scope;
6687 }
6688
1bd714f2 6689 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6690 trace_nfs4_exchange_id(clp, status);
177313f1 6691 if (status == 0)
32b01310 6692 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6693
2031cd1a
WAA		 6694 if (status == 0)
6695 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6696
acdeb69d 6697 if (status == 0) {
32b01310
TM		 6698 clp->cl_clientid = res.clientid;
6699 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6700 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6701 clp->cl_seqid = res.seqid;
6702
acdeb69d
CL		 6703 kfree(clp->cl_serverowner);
6704 clp->cl_serverowner = res.server_owner;
6705 res.server_owner = NULL;
78fe0f41 6706
7d2ed9ac 6707 /* use the most recent implementation id */
59155546
CL		 6708 kfree(clp->cl_implid);
6709 clp->cl_implid = res.impl_id;
7d2ed9ac 6710
177313f1 6711 if (clp->cl_serverscope != NULL &&
79d4e1f0 6712 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6713 res.server_scope)) {
6714 dprintk("%s: server_scope mismatch detected\n",
6715 __func__);
6716 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6717 kfree(clp->cl_serverscope);
6718 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6719 }
6720
177313f1 6721 if (clp->cl_serverscope == NULL) {
79d4e1f0 6722 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6723 goto out;
6724 }
32b01310
TM		 6725 } else
6726 kfree(res.impl_id);
7d2ed9ac 6727
acdeb69d
CL		 6728out_server_owner:
6729 kfree(res.server_owner);
7d2ed9ac 6730out_server_scope:
abe9a6d5
WAA		 6731 kfree(res.server_scope);
6732out:
177313f1 6733 if (clp->cl_implid != NULL)
6bbb4ae8 6734 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6735 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6736 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6737 clp->cl_implid->date.seconds,
6738 clp->cl_implid->date.nseconds);
6bbb4ae8 6739 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6740 return status;
6741}
6742
2031cd1a
WAA		 6743/*
6744 * nfs4_proc_exchange_id()
6745 *
6746 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6747 *
6748 * Since the clientid has expired, all compounds using sessions
6749 * associated with the stale clientid will be returning
6750 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6751 * be in some phase of session reset.
6752 *
6753 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6754 */
6755int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6756{
6757 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6758 int status;
6759
6760 /* try SP4_MACH_CRED if krb5i/p */
6761 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6762 authflavor == RPC_AUTH_GSS_KRB5P) {
6763 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6764 if (!status)
6765 return 0;
6766 }
6767
6768 /* try SP4_NONE */
6769 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6770}
6771
66245539
TM		 6772static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6773 struct rpc_cred *cred)
6774{
6775 struct rpc_message msg = {
6776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6777 .rpc_argp = clp,
6778 .rpc_cred = cred,
6779 };
6780 int status;
6781
6782 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6783 trace_nfs4_destroy_clientid(clp, status);
66245539 6784 if (status)
02c67525 6785 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6786 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6787 return status;
6788}
6789
6790static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6791 struct rpc_cred *cred)
6792{
6793 unsigned int loop;
6794 int ret;
6795
6796 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6797 ret = _nfs4_proc_destroy_clientid(clp, cred);
6798 switch (ret) {
6799 case -NFS4ERR_DELAY:
6800 case -NFS4ERR_CLIENTID_BUSY:
6801 ssleep(1);
6802 break;
6803 default:
6804 return ret;
6805 }
6806 }
6807 return 0;
6808}
6809
6810int nfs4_destroy_clientid(struct nfs_client *clp)
6811{
6812 struct rpc_cred *cred;
6813 int ret = 0;
6814
6815 if (clp->cl_mvops->minor_version < 1)
6816 goto out;
6817 if (clp->cl_exchange_flags == 0)
6818 goto out;
05f4c350
CL		 6819 if (clp->cl_preserve_clid)
6820 goto out;
73d8bde5 6821 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6822 ret = nfs4_proc_destroy_clientid(clp, cred);
6823 if (cred)
6824 put_rpccred(cred);
6825 switch (ret) {
6826 case 0:
6827 case -NFS4ERR_STALE_CLIENTID:
6828 clp->cl_exchange_flags = 0;
6829 }
6830out:
6831 return ret;
6832}
6833
2050f0cc
AA		 6834struct nfs4_get_lease_time_data {
6835 struct nfs4_get_lease_time_args *args;
6836 struct nfs4_get_lease_time_res *res;
6837 struct nfs_client *clp;
6838};
6839
6840static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6841 void *calldata)
6842{
2050f0cc
AA		 6843 struct nfs4_get_lease_time_data *data =
6844 (struct nfs4_get_lease_time_data *)calldata;
6845
6846 dprintk("--> %s\n", __func__);
6847 /* just setup sequence, do not trigger session recovery
6848 since we're invoked within one */
d9afbd1b
TM		 6849 nfs41_setup_sequence(data->clp->cl_session,
6850 &data->args->la_seq_args,
6851 &data->res->lr_seq_res,
6852 task);
2050f0cc
AA		 6853 dprintk("<-- %s\n", __func__);
6854}
6855
6856/*
6857 * Called from nfs4_state_manager thread for session setup, so don't recover
6858 * from sequence operation or clientid errors.
6859 */
6860static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6861{
6862 struct nfs4_get_lease_time_data *data =
6863 (struct nfs4_get_lease_time_data *)calldata;
6864
6865 dprintk("--> %s\n", __func__);
14516c3a
TM		 6866 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6867 return;
2050f0cc
AA		 6868 switch (task->tk_status) {
6869 case -NFS4ERR_DELAY:
6870 case -NFS4ERR_GRACE:
6871 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6872 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6873 task->tk_status = 0;
a8a4ae3a
AA		 6874 /* fall through */
6875 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6876 rpc_restart_call_prepare(task);
2050f0cc
AA		 6877 return;
6878 }
2050f0cc
AA		 6879 dprintk("<-- %s\n", __func__);
6880}
6881
17280175 6882static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6883 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6884 .rpc_call_done = nfs4_get_lease_time_done,
6885};
6886
6887int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6888{
6889 struct rpc_task *task;
6890 struct nfs4_get_lease_time_args args;
6891 struct nfs4_get_lease_time_res res = {
6892 .lr_fsinfo = fsinfo,
6893 };
6894 struct nfs4_get_lease_time_data data = {
6895 .args = &args,
6896 .res = &res,
6897 .clp = clp,
6898 };
6899 struct rpc_message msg = {
6900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6901 .rpc_argp = &args,
6902 .rpc_resp = &res,
6903 };
6904 struct rpc_task_setup task_setup = {
6905 .rpc_client = clp->cl_rpcclient,
6906 .rpc_message = &msg,
6907 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6908 .callback_data = &data,
6909 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6910 };
6911 int status;
6912
a9c92d6b 6913 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6914 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6915 dprintk("--> %s\n", __func__);
6916 task = rpc_run_task(&task_setup);
6917
6918 if (IS_ERR(task))
6919 status = PTR_ERR(task);
6920 else {
6921 status = task->tk_status;
6922 rpc_put_task(task);
6923 }
6924 dprintk("<-- %s return %d\n", __func__, status);
6925
6926 return status;
6927}
6928
fc931582
AA		 6929/*
6930 * Initialize the values to be used by the client in CREATE_SESSION
6931 * If nfs4_init_session set the fore channel request and response sizes,
6932 * use them.
6933 *
6934 * Set the back channel max_resp_sz_cached to zero to force the client to
6935 * always set csa_cachethis to FALSE because the current implementation
6936 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6937 */
6938static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6939{
18aad3d5
AA		 6940 unsigned int max_rqst_sz, max_resp_sz;
6941
6942 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6943 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6944
fc931582 6945 /* Fore channel attributes */
18aad3d5
AA		 6946 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6947 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6948 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6949 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6950
6951 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6952 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6953 __func__,
6954 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6955 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6956
6957 /* Back channel attributes */
fc931582
AA		 6958 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6959 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6960 args->bc_attrs.max_resp_sz_cached = 0;
6961 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6962 args->bc_attrs.max_reqs = 1;
6963
6964 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6965 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6966 __func__,
6967 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6968 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6969 args->bc_attrs.max_reqs);
6970}
6971
43c2e885 6972static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6973{
43c2e885
BF		 6974 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6975 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6976
43c2e885
BF		 6977 if (rcvd->max_resp_sz > sent->max_resp_sz)
6978 return -EINVAL;
6979 /*
6980 * Our requested max_ops is the minimum we need; we're not
6981 * prepared to break up compounds into smaller pieces than that.
6982 * So, no point even trying to continue if the server won't
6983 * cooperate:
6984 */
6985 if (rcvd->max_ops < sent->max_ops)
6986 return -EINVAL;
6987 if (rcvd->max_reqs == 0)
6988 return -EINVAL;
b4b9a0c1
VG		 6989 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6990 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6991 return 0;
8d35301d
AA		 6992}
6993
43c2e885
BF		 6994static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6995{
6996 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6997 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6998
43c2e885
BF		 6999 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7000 return -EINVAL;
7001 if (rcvd->max_resp_sz < sent->max_resp_sz)
7002 return -EINVAL;
7003 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7004 return -EINVAL;
7005 /* These would render the backchannel useless: */
b4b9a0c1 7006 if (rcvd->max_ops != sent->max_ops)
43c2e885 7007 return -EINVAL;
b4b9a0c1 7008 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7009 return -EINVAL;
7010 return 0;
7011}
8d35301d 7012
8d35301d
AA		 7013static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7014 struct nfs4_session *session)
7015{
43c2e885 7016 int ret;
8d35301d 7017
43c2e885
BF		 7018 ret = nfs4_verify_fore_channel_attrs(args, session);
7019 if (ret)
7020 return ret;
7021 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7022}
7023
848f5bda
TM		 7024static int _nfs4_proc_create_session(struct nfs_client *clp,
7025 struct rpc_cred *cred)
fc931582
AA		 7026{
7027 struct nfs4_session *session = clp->cl_session;
7028 struct nfs41_create_session_args args = {
7029 .client = clp,
7030 .cb_program = NFS4_CALLBACK,
7031 };
7032 struct nfs41_create_session_res res = {
7033 .client = clp,
7034 };
7035 struct rpc_message msg = {
7036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7037 .rpc_argp = &args,
7038 .rpc_resp = &res,
848f5bda 7039 .rpc_cred = cred,
fc931582
AA		 7040 };
7041 int status;
7042
7043 nfs4_init_channel_attrs(&args);
0f91421e 7044 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7045
1bd714f2 7046 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7047 trace_nfs4_create_session(clp, status);
fc931582 7048
43095d39 7049 if (!status) {
8d35301d
AA		 7050 /* Verify the session's negotiated channel_attrs values */
7051 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7052 /* Increment the clientid slot sequence id */
7053 clp->cl_seqid++;
7054 }
7055
7056 return status;
7057}
7058
7059/*
7060 * Issues a CREATE_SESSION operation to the server.
7061 * It is the responsibility of the caller to verify the session is
7062 * expired before calling this routine.
7063 */
848f5bda 7064int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7065{
7066 int status;
7067 unsigned *ptr;
fc931582
AA		 7068 struct nfs4_session *session = clp->cl_session;
7069
7070 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7071
848f5bda 7072 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7073 if (status)
7074 goto out;
7075
aacd5537
AA		 7076 /* Init or reset the session slot tables */
7077 status = nfs4_setup_session_slot_tables(session);
7078 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7079 if (status)
7080 goto out;
7081
7082 ptr = (unsigned *)&session->sess_id.data[0];
7083 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7084 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7085out:
7086 dprintk("<-- %s\n", __func__);
7087 return status;
7088}
7089
0f3e66c6
AA		 7090/*
7091 * Issue the over-the-wire RPC DESTROY_SESSION.
7092 * The caller must serialize access to this routine.
7093 */
848f5bda
TM		 7094int nfs4_proc_destroy_session(struct nfs4_session *session,
7095 struct rpc_cred *cred)
0f3e66c6 7096{
848f5bda
TM		 7097 struct rpc_message msg = {
7098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7099 .rpc_argp = session,
7100 .rpc_cred = cred,
7101 };
0f3e66c6 7102 int status = 0;
0f3e66c6
AA		 7103
7104 dprintk("--> nfs4_proc_destroy_session\n");
7105
7106 /* session is still being setup */
7107 if (session->clp->cl_cons_state != NFS_CS_READY)
7108 return status;
7109
1bd714f2 7110 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7111 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7112
7113 if (status)
08106ac7 7114 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7115 "Session has been destroyed regardless...\n", status);
7116
7117 dprintk("<-- nfs4_proc_destroy_session\n");
7118 return status;
7119}
7120
fc01cea9
AA		 7121/*
7122 * Renew the cl_session lease.
7123 */
d5f8d3fe
TM		 7124struct nfs4_sequence_data {
7125 struct nfs_client *clp;
7126 struct nfs4_sequence_args args;
7127 struct nfs4_sequence_res res;
7128};
7129
dc96aef9
AB		 7130static void nfs41_sequence_release(void *data)
7131{
d5f8d3fe
TM		 7132 struct nfs4_sequence_data *calldata = data;
7133 struct nfs_client *clp = calldata->clp;
dc96aef9 7134
7135840f
AB		 7135 if (atomic_read(&clp->cl_count) > 1)
7136 nfs4_schedule_state_renewal(clp);
7137 nfs_put_client(clp);
d5f8d3fe 7138 kfree(calldata);
dc96aef9
AB		 7139}
7140
aa5190d0
TM		 7141static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7142{
7143 switch(task->tk_status) {
7144 case -NFS4ERR_DELAY:
aa5190d0
TM		 7145 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7146 return -EAGAIN;
7147 default:
0400a6b0 7148 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7149 }
7150 return 0;
7151}
7152
dc96aef9 7153static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7154{
d5f8d3fe
TM		 7155 struct nfs4_sequence_data *calldata = data;
7156 struct nfs_client *clp = calldata->clp;
fc01cea9 7157
14516c3a
TM		 7158 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7159 return;
fc01cea9 7160
c6d01c6f 7161 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7162 if (task->tk_status < 0) {
7163 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7164 if (atomic_read(&clp->cl_count) == 1)
7165 goto out;
fc01cea9 7166
aa5190d0
TM		 7167 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7168 rpc_restart_call_prepare(task);
fc01cea9
AA		 7169 return;
7170 }
7171 }
fc01cea9 7172 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7173out:
fc01cea9
AA		 7174 dprintk("<-- %s\n", __func__);
7175}
7176
7177static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7178{
d5f8d3fe
TM		 7179 struct nfs4_sequence_data *calldata = data;
7180 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7181 struct nfs4_sequence_args *args;
7182 struct nfs4_sequence_res *res;
7183
fc01cea9
AA		 7184 args = task->tk_msg.rpc_argp;
7185 res = task->tk_msg.rpc_resp;
7186
d9afbd1b 7187 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7188}
7189
7190static const struct rpc_call_ops nfs41_sequence_ops = {
7191 .rpc_call_done = nfs41_sequence_call_done,
7192 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7193 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7194};
7195
8fe72bac
TM		 7196static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7197 struct rpc_cred *cred,
7198 bool is_privileged)
fc01cea9 7199{
d5f8d3fe 7200 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7201 struct rpc_message msg = {
7202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7203 .rpc_cred = cred,
7204 };
71ac6da9
TM		 7205 struct rpc_task_setup task_setup_data = {
7206 .rpc_client = clp->cl_rpcclient,
7207 .rpc_message = &msg,
8fe72bac 7208 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7209 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7210 };
fc01cea9 7211
7135840f 7212 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7213 return ERR_PTR(-EIO);
dfb4f309 7214 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7215 if (calldata == NULL) {
7135840f 7216 nfs_put_client(clp);
71ac6da9 7217 return ERR_PTR(-ENOMEM);
fc01cea9 7218 }
a9c92d6b 7219 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7220 if (is_privileged)
7221 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7222 msg.rpc_argp = &calldata->args;
7223 msg.rpc_resp = &calldata->res;
7224 calldata->clp = clp;
71ac6da9 7225 task_setup_data.callback_data = calldata;
fc01cea9 7226
71ac6da9
TM		 7227 return rpc_run_task(&task_setup_data);
7228}
7229
2f60ea6b 7230static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7231{
7232 struct rpc_task *task;
7233 int ret = 0;
7234
2f60ea6b
TM		 7235 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7236 return 0;
8fe72bac 7237 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7238 if (IS_ERR(task))
7239 ret = PTR_ERR(task);
7240 else
bf294b41 7241 rpc_put_task_async(task);
71ac6da9
TM		 7242 dprintk("<-- %s status=%d\n", __func__, ret);
7243 return ret;
7244}
7245
7246static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7247{
7248 struct rpc_task *task;
7249 int ret;
7250
8fe72bac 7251 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7252 if (IS_ERR(task)) {
7253 ret = PTR_ERR(task);
7254 goto out;
7255 }
7256 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7257 if (!ret) {
7258 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7259
7260 if (task->tk_status == 0)
7261 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7262 ret = task->tk_status;
b4410c2f 7263 }
71ac6da9
TM		 7264 rpc_put_task(task);
7265out:
7266 dprintk("<-- %s status=%d\n", __func__, ret);
7267 return ret;
fc01cea9
AA		 7268}
7269
fce5c838
RL		 7270struct nfs4_reclaim_complete_data {
7271 struct nfs_client *clp;
7272 struct nfs41_reclaim_complete_args arg;
7273 struct nfs41_reclaim_complete_res res;
7274};
7275
7276static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7277{
7278 struct nfs4_reclaim_complete_data *calldata = data;
7279
d9afbd1b
TM		 7280 nfs41_setup_sequence(calldata->clp->cl_session,
7281 &calldata->arg.seq_args,
7282 &calldata->res.seq_res,
7283 task);
fce5c838
RL		 7284}
7285
aa5190d0
TM		 7286static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7287{
7288 switch(task->tk_status) {
7289 case 0:
7290 case -NFS4ERR_COMPLETE_ALREADY:
7291 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7292 break;
7293 case -NFS4ERR_DELAY:
aa5190d0 7294 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7295 /* fall through */
7296 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7297 return -EAGAIN;
7298 default:
0400a6b0 7299 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7300 }
7301 return 0;
7302}
7303
fce5c838
RL		 7304static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7305{
7306 struct nfs4_reclaim_complete_data *calldata = data;
7307 struct nfs_client *clp = calldata->clp;
7308 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7309
7310 dprintk("--> %s\n", __func__);
14516c3a
TM		 7311 if (!nfs41_sequence_done(task, res))
7312 return;
fce5c838 7313
c6d01c6f 7314 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7315 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7316 rpc_restart_call_prepare(task);
7317 return;
7318 }
fce5c838
RL		 7319 dprintk("<-- %s\n", __func__);
7320}
7321
7322static void nfs4_free_reclaim_complete_data(void *data)
7323{
7324 struct nfs4_reclaim_complete_data *calldata = data;
7325
7326 kfree(calldata);
7327}
7328
7329static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7330 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7331 .rpc_call_done = nfs4_reclaim_complete_done,
7332 .rpc_release = nfs4_free_reclaim_complete_data,
7333};
7334
7335/*
7336 * Issue a global reclaim complete.
7337 */
965e9c23
TM		 7338static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7339 struct rpc_cred *cred)
fce5c838
RL		 7340{
7341 struct nfs4_reclaim_complete_data *calldata;
7342 struct rpc_task *task;
7343 struct rpc_message msg = {
7344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7345 .rpc_cred = cred,
fce5c838
RL		 7346 };
7347 struct rpc_task_setup task_setup_data = {
7348 .rpc_client = clp->cl_rpcclient,
7349 .rpc_message = &msg,
7350 .callback_ops = &nfs4_reclaim_complete_call_ops,
7351 .flags = RPC_TASK_ASYNC,
7352 };
7353 int status = -ENOMEM;
7354
7355 dprintk("--> %s\n", __func__);
8535b2be 7356 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7357 if (calldata == NULL)
7358 goto out;
7359 calldata->clp = clp;
7360 calldata->arg.one_fs = 0;
fce5c838 7361
a9c92d6b 7362 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7363 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7364 msg.rpc_argp = &calldata->arg;
7365 msg.rpc_resp = &calldata->res;
7366 task_setup_data.callback_data = calldata;
7367 task = rpc_run_task(&task_setup_data);
acf82b85 7368 if (IS_ERR(task)) {
fce5c838 7369 status = PTR_ERR(task);
acf82b85
DC		 7370 goto out;
7371 }
c34c32ea
AA		 7372 status = nfs4_wait_for_completion_rpc_task(task);
7373 if (status == 0)
7374 status = task->tk_status;
fce5c838 7375 rpc_put_task(task);
acf82b85 7376 return 0;
fce5c838
RL		 7377out:
7378 dprintk("<-- %s status=%d\n", __func__, status);
7379 return status;
7380}
b1f69b75
AA		 7381
7382static void
7383nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7384{
7385 struct nfs4_layoutget *lgp = calldata;
c31663d4 7386 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7387 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7388
7389 dprintk("--> %s\n", __func__);
c31663d4
FI		 7390 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7391 * right now covering the LAYOUTGET we are about to send.
7392 * However, that is not so catastrophic, and there seems
7393 * to be no way to prevent it completely.
7394 */
6ba7db34 7395 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7396 &lgp->res.seq_res, task))
b1f69b75 7397 return;
cf7d63f1
FI		 7398 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7399 NFS_I(lgp->args.inode)->layout,
7400 lgp->args.ctx->state)) {
7401 rpc_exit(task, NFS4_OK);
cf7d63f1 7402 }
b1f69b75
AA		 7403}
7404
7405static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7406{
7407 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7408 struct inode *inode = lgp->args.inode;
7409 struct nfs_server *server = NFS_SERVER(inode);
7410 struct pnfs_layout_hdr *lo;
7411 struct nfs4_state *state = NULL;
30005121 7412 unsigned long timeo, giveup;
b1f69b75
AA		 7413
7414 dprintk("--> %s\n", __func__);
7415
6ba7db34 7416 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7417 goto out;
b1f69b75
AA		 7418
7419 switch (task->tk_status) {
7420 case 0:
ee314c2a 7421 goto out;
b1f69b75
AA		 7422 case -NFS4ERR_LAYOUTTRYLATER:
7423 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7424 timeo = rpc_get_timeout(task->tk_client);
7425 giveup = lgp->args.timestamp + timeo;
7426 if (time_after(giveup, jiffies))
7427 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7428 break;
7429 case -NFS4ERR_EXPIRED:
7430 case -NFS4ERR_BAD_STATEID:
7431 spin_lock(&inode->i_lock);
7432 lo = NFS_I(inode)->layout;
7433 if (!lo || list_empty(&lo->plh_segs)) {
7434 spin_unlock(&inode->i_lock);
7435 /* If the open stateid was bad, then recover it. */
7436 state = lgp->args.ctx->state;
7437 } else {
7438 LIST_HEAD(head);
7439
7440 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7441 spin_unlock(&inode->i_lock);
7442 /* Mark the bad layout state as invalid, then
7443 * retry using the open stateid. */
7444 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7445 }
7446 }
ee314c2a
TM		 7447 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7448 rpc_restart_call_prepare(task);
7449out:
b1f69b75
AA		 7450 dprintk("<-- %s\n", __func__);
7451}
7452
8554116e
IK		 7453static size_t max_response_pages(struct nfs_server *server)
7454{
7455 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7456 return nfs_page_array_len(0, max_resp_sz);
7457}
7458
7459static void nfs4_free_pages(struct page **pages, size_t size)
7460{
7461 int i;
7462
7463 if (!pages)
7464 return;
7465
7466 for (i = 0; i < size; i++) {
7467 if (!pages[i])
7468 break;
7469 __free_page(pages[i]);
7470 }
7471 kfree(pages);
7472}
7473
7474static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7475{
7476 struct page **pages;
7477 int i;
7478
7479 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7480 if (!pages) {
7481 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7482 return NULL;
7483 }
7484
7485 for (i = 0; i < size; i++) {
7486 pages[i] = alloc_page(gfp_flags);
7487 if (!pages[i]) {
7488 dprintk("%s: failed to allocate page\n", __func__);
7489 nfs4_free_pages(pages, size);
7490 return NULL;
7491 }
7492 }
7493
7494 return pages;
7495}
7496
b1f69b75
AA		 7497static void nfs4_layoutget_release(void *calldata)
7498{
7499 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7500 struct inode *inode = lgp->args.inode;
7501 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7502 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7503
7504 dprintk("--> %s\n", __func__);
8554116e 7505 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7506 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7507 put_nfs_open_context(lgp->args.ctx);
7508 kfree(calldata);
7509 dprintk("<-- %s\n", __func__);
7510}
7511
7512static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7513 .rpc_call_prepare = nfs4_layoutget_prepare,
7514 .rpc_call_done = nfs4_layoutget_done,
7515 .rpc_release = nfs4_layoutget_release,
7516};
7517
a0b0a6e3
TM		 7518struct pnfs_layout_segment *
7519nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7520{
a47970ff
WAA		 7521 struct inode *inode = lgp->args.inode;
7522 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7523 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7524 struct rpc_task *task;
7525 struct rpc_message msg = {
7526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7527 .rpc_argp = &lgp->args,
7528 .rpc_resp = &lgp->res,
6ab59344 7529 .rpc_cred = lgp->cred,
b1f69b75
AA		 7530 };
7531 struct rpc_task_setup task_setup_data = {
7532 .rpc_client = server->client,
7533 .rpc_message = &msg,
7534 .callback_ops = &nfs4_layoutget_call_ops,
7535 .callback_data = lgp,
7536 .flags = RPC_TASK_ASYNC,
7537 };
a0b0a6e3 7538 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7539 int status = 0;
7540
7541 dprintk("--> %s\n", __func__);
7542
8554116e
IK		 7543 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7544 if (!lgp->args.layout.pages) {
7545 nfs4_layoutget_release(lgp);
a0b0a6e3 7546 return ERR_PTR(-ENOMEM);
8554116e
IK		 7547 }
7548 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7549 lgp->args.timestamp = jiffies;
8554116e 7550
35124a09 7551 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7552 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7553 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7554
7555 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7556 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7557
b1f69b75
AA		 7558 task = rpc_run_task(&task_setup_data);
7559 if (IS_ERR(task))
a0b0a6e3 7560 return ERR_CAST(task);
b1f69b75 7561 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7562 if (status == 0)
7563 status = task->tk_status;
1037e6ea
TM		 7564 trace_nfs4_layoutget(lgp->args.ctx,
7565 &lgp->args.range,
7566 &lgp->res.range,
7567 status);
085b7a45
WAA		 7568 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7569 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7570 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7571 rpc_put_task(task);
7572 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7573 if (status)
7574 return ERR_PTR(status);
7575 return lseg;
b1f69b75
AA		 7576}
7577
cbe82603
BH		 7578static void
7579nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7580{
7581 struct nfs4_layoutreturn *lrp = calldata;
7582
7583 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7584 nfs41_setup_sequence(lrp->clp->cl_session,
7585 &lrp->args.seq_args,
7586 &lrp->res.seq_res,
7587 task);
cbe82603
BH		 7588}
7589
7590static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7591{
7592 struct nfs4_layoutreturn *lrp = calldata;
7593 struct nfs_server *server;
7594
7595 dprintk("--> %s\n", __func__);
7596
6ba7db34 7597 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7598 return;
7599
7600 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7601 switch (task->tk_status) {
7602 default:
7603 task->tk_status = 0;
7604 case 0:
7605 break;
7606 case -NFS4ERR_DELAY:
7607 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7608 break;
d00c5d43 7609 rpc_restart_call_prepare(task);
cbe82603
BH		 7610 return;
7611 }
cbe82603
BH		 7612 dprintk("<-- %s\n", __func__);
7613}
7614
7615static void nfs4_layoutreturn_release(void *calldata)
7616{
7617 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7618 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7619
7620 dprintk("--> %s\n", __func__);
849b286f
TM		 7621 spin_lock(&lo->plh_inode->i_lock);
7622 if (lrp->res.lrs_present)
7623 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7624 lo->plh_block_lgets--;
7625 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7626 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7627 kfree(calldata);
7628 dprintk("<-- %s\n", __func__);
7629}
7630
7631static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7632 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7633 .rpc_call_done = nfs4_layoutreturn_done,
7634 .rpc_release = nfs4_layoutreturn_release,
7635};
7636
7637int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7638{
7639 struct rpc_task *task;
7640 struct rpc_message msg = {
7641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7642 .rpc_argp = &lrp->args,
7643 .rpc_resp = &lrp->res,
9556000d 7644 .rpc_cred = lrp->cred,
cbe82603
BH		 7645 };
7646 struct rpc_task_setup task_setup_data = {
1771c577 7647 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7648 .rpc_message = &msg,
7649 .callback_ops = &nfs4_layoutreturn_call_ops,
7650 .callback_data = lrp,
7651 };
7652 int status;
7653
7654 dprintk("--> %s\n", __func__);
a9c92d6b 7655 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7656 task = rpc_run_task(&task_setup_data);
7657 if (IS_ERR(task))
7658 return PTR_ERR(task);
7659 status = task->tk_status;
1037e6ea 7660 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7661 dprintk("<-- %s status=%d\n", __func__, status);
7662 rpc_put_task(task);
7663 return status;
7664}
7665
7f11d8d3
AA		 7666/*
7667 * Retrieve the list of Data Server devices from the MDS.
7668 */
7669static int _nfs4_getdevicelist(struct nfs_server *server,
7670 const struct nfs_fh *fh,
7671 struct pnfs_devicelist *devlist)
7672{
7673 struct nfs4_getdevicelist_args args = {
7674 .fh = fh,
7675 .layoutclass = server->pnfs_curr_ld->id,
7676 };
7677 struct nfs4_getdevicelist_res res = {
7678 .devlist = devlist,
7679 };
7680 struct rpc_message msg = {
7681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7682 .rpc_argp = &args,
7683 .rpc_resp = &res,
7684 };
7685 int status;
7686
7687 dprintk("--> %s\n", __func__);
7688 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7689 &res.seq_res, 0);
7690 dprintk("<-- %s status=%d\n", __func__, status);
7691 return status;
7692}
7693
7694int nfs4_proc_getdevicelist(struct nfs_server *server,
7695 const struct nfs_fh *fh,
7696 struct pnfs_devicelist *devlist)
7697{
7698 struct nfs4_exception exception = { };
7699 int err;
7700
7701 do {
7702 err = nfs4_handle_exception(server,
7703 _nfs4_getdevicelist(server, fh, devlist),
7704 &exception);
7705 } while (exception.retry);
7706
7707 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7708 err, devlist->num_devs);
7709
7710 return err;
7711}
7712EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7713
b1f69b75 7714static int
cd5875fe
TM		 7715_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7716 struct pnfs_device *pdev,
7717 struct rpc_cred *cred)
b1f69b75
AA		 7718{
7719 struct nfs4_getdeviceinfo_args args = {
7720 .pdev = pdev,
7721 };
7722 struct nfs4_getdeviceinfo_res res = {
7723 .pdev = pdev,
7724 };
7725 struct rpc_message msg = {
7726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7727 .rpc_argp = &args,
7728 .rpc_resp = &res,
cd5875fe 7729 .rpc_cred = cred,
b1f69b75
AA		 7730 };
7731 int status;
7732
7733 dprintk("--> %s\n", __func__);
7c513058 7734 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7735 dprintk("<-- %s status=%d\n", __func__, status);
7736
7737 return status;
7738}
7739
cd5875fe
TM		 7740int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7741 struct pnfs_device *pdev,
7742 struct rpc_cred *cred)
b1f69b75
AA		 7743{
7744 struct nfs4_exception exception = { };
7745 int err;
7746
7747 do {
7748 err = nfs4_handle_exception(server,
cd5875fe 7749 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7750 &exception);
7751 } while (exception.retry);
7752 return err;
7753}
7754EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7755
863a3c6c
AA		 7756static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7757{
7758 struct nfs4_layoutcommit_data *data = calldata;
7759 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7760 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7761
d9afbd1b
TM		 7762 nfs41_setup_sequence(session,
7763 &data->args.seq_args,
7764 &data->res.seq_res,
7765 task);
863a3c6c
AA		 7766}
7767
7768static void
7769nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7770{
7771 struct nfs4_layoutcommit_data *data = calldata;
7772 struct nfs_server *server = NFS_SERVER(data->args.inode);
7773
6ba7db34 7774 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7775 return;
7776
7777 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7778 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7779 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7780 case -NFS4ERR_BADLAYOUT: /* no layout */
7781 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7782 task->tk_status = 0;
e59d27e0 7783 case 0:
e59d27e0
TM		 7784 break;
7785 default:
7786 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7787 rpc_restart_call_prepare(task);
7788 return;
7789 }
7790 }
863a3c6c
AA		 7791}
7792
7793static void nfs4_layoutcommit_release(void *calldata)
7794{
7795 struct nfs4_layoutcommit_data *data = calldata;
7796
db29c089 7797 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7798 nfs_post_op_update_inode_force_wcc(data->args.inode,
7799 data->res.fattr);
863a3c6c
AA		 7800 put_rpccred(data->cred);
7801 kfree(data);
7802}
7803
7804static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7805 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7806 .rpc_call_done = nfs4_layoutcommit_done,
7807 .rpc_release = nfs4_layoutcommit_release,
7808};
7809
7810int
ef311537 7811nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7812{
7813 struct rpc_message msg = {
7814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7815 .rpc_argp = &data->args,
7816 .rpc_resp = &data->res,
7817 .rpc_cred = data->cred,
7818 };
7819 struct rpc_task_setup task_setup_data = {
7820 .task = &data->task,
7821 .rpc_client = NFS_CLIENT(data->args.inode),
7822 .rpc_message = &msg,
7823 .callback_ops = &nfs4_layoutcommit_ops,
7824 .callback_data = data,
7825 .flags = RPC_TASK_ASYNC,
7826 };
7827 struct rpc_task *task;
7828 int status = 0;
7829
7830 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7831 "lbw: %llu inode %lu\n",
7832 data->task.tk_pid, sync,
7833 data->args.lastbytewritten,
7834 data->args.inode->i_ino);
7835
a9c92d6b 7836 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7837 task = rpc_run_task(&task_setup_data);
7838 if (IS_ERR(task))
7839 return PTR_ERR(task);
ef311537 7840 if (sync == false)
863a3c6c
AA		 7841 goto out;
7842 status = nfs4_wait_for_completion_rpc_task(task);
7843 if (status != 0)
7844 goto out;
7845 status = task->tk_status;
1037e6ea 7846 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7847out:
7848 dprintk("%s: status %d\n", __func__, status);
7849 rpc_put_task(task);
7850 return status;
7851}
fca78d6d 7852
97431204
AA		 7853/**
7854 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7855 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7856 */
fca78d6d
BS		 7857static int
7858_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7859 struct nfs_fsinfo *info,
7860 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7861{
7862 struct nfs41_secinfo_no_name_args args = {
7863 .style = SECINFO_STYLE_CURRENT_FH,
7864 };
7865 struct nfs4_secinfo_res res = {
7866 .flavors = flavors,
7867 };
7868 struct rpc_message msg = {
7869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7870 .rpc_argp = &args,
7871 .rpc_resp = &res,
7872 };
b1b3e136 7873 struct rpc_clnt *clnt = server->client;
7cb852df 7874 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7875 int status;
7876
7877 if (use_integrity) {
7878 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7879 cred = nfs4_get_clid_cred(server->nfs_client);
7880 msg.rpc_cred = cred;
b1b3e136
WAA		 7881 }
7882
7883 dprintk("--> %s\n", __func__);
7884 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7885 &res.seq_res, 0);
7886 dprintk("<-- %s status=%d\n", __func__, status);
7887
7cb852df
WAA		 7888 if (cred)
7889 put_rpccred(cred);
b1b3e136
WAA		 7890
7891 return status;
fca78d6d
BS		 7892}
7893
7894static int
7895nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7896 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7897{
7898 struct nfs4_exception exception = { };
7899 int err;
7900 do {
b1b3e136
WAA		 7901 /* first try using integrity protection */
7902 err = -NFS4ERR_WRONGSEC;
7903
7904 /* try to use integrity protection with machine cred */
7905 if (_nfs4_is_integrity_protected(server->nfs_client))
7906 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7907 flavors, true);
7908
7909 /*
7910 * if unable to use integrity protection, or SECINFO with
7911 * integrity protection returns NFS4ERR_WRONGSEC (which is
7912 * disallowed by spec, but exists in deployed servers) use
7913 * the current filesystem's rpc_client and the user cred.
7914 */
7915 if (err == -NFS4ERR_WRONGSEC)
7916 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7917 flavors, false);
7918
fca78d6d
BS		 7919 switch (err) {
7920 case 0:
7921 case -NFS4ERR_WRONGSEC:
7922 case -NFS4ERR_NOTSUPP:
05e9cfb4 7923 goto out;
fca78d6d
BS		 7924 default:
7925 err = nfs4_handle_exception(server, err, &exception);
7926 }
7927 } while (exception.retry);
05e9cfb4 7928out:
fca78d6d
BS		 7929 return err;
7930}
7931
7932static int
7933nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7934 struct nfs_fsinfo *info)
7935{
7936 int err;
7937 struct page *page;
367156d9 7938 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7939 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7940 struct nfs4_secinfo4 *secinfo;
7941 int i;
fca78d6d
BS		 7942
7943 page = alloc_page(GFP_KERNEL);
7944 if (!page) {
7945 err = -ENOMEM;
7946 goto out;
7947 }
7948
7949 flavors = page_address(page);
7950 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7951
7952 /*
7953 * Fall back on "guess and check" method if
7954 * the server doesn't support SECINFO_NO_NAME
7955 */
7956 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7957 err = nfs4_find_root_sec(server, fhandle, info);
7958 goto out_freepage;
7959 }
7960 if (err)
7961 goto out_freepage;
7962
58a8cf12
WAA		 7963 for (i = 0; i < flavors->num_flavors; i++) {
7964 secinfo = &flavors->flavors[i];
7965
7966 switch (secinfo->flavor) {
7967 case RPC_AUTH_NULL:
7968 case RPC_AUTH_UNIX:
7969 case RPC_AUTH_GSS:
7970 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7971 &secinfo->flavor_info);
7972 break;
7973 default:
7974 flavor = RPC_AUTH_MAXFLAVOR;
7975 break;
7976 }
7977
4d4b69dd
WAA		 7978 if (!nfs_auth_info_match(&server->auth_info, flavor))
7979 flavor = RPC_AUTH_MAXFLAVOR;
7980
58a8cf12
WAA		 7981 if (flavor != RPC_AUTH_MAXFLAVOR) {
7982 err = nfs4_lookup_root_sec(server, fhandle,
7983 info, flavor);
7984 if (!err)
7985 break;
7986 }
7987 }
7988
7989 if (flavor == RPC_AUTH_MAXFLAVOR)
7990 err = -EPERM;
fca78d6d
BS		 7991
7992out_freepage:
7993 put_page(page);
7994 if (err == -EACCES)
7995 return -EPERM;
7996out:
7997 return err;
7998}
1cab0652 7999
ab7cb0df
TM		 8000static int _nfs41_test_stateid(struct nfs_server *server,
8001 nfs4_stateid *stateid,
8002 struct rpc_cred *cred)
7d974794
BS		 8003{
8004 int status;
8005 struct nfs41_test_stateid_args args = {
1cab0652 8006 .stateid = stateid,
7d974794
BS		 8007 };
8008 struct nfs41_test_stateid_res res;
8009 struct rpc_message msg = {
8010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8011 .rpc_argp = &args,
8012 .rpc_resp = &res,
ab7cb0df 8013 .rpc_cred = cred,
7d974794 8014 };
3787d506
WAA		 8015 struct rpc_clnt *rpc_client = server->client;
8016
8017 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8018 &rpc_client, &msg);
1cab0652 8019
38527b15 8020 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8021 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8022 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8023 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8024 &args.seq_args, &res.seq_res);
38527b15
CL		 8025 if (status != NFS_OK) {
8026 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8027 return status;
38527b15
CL		 8028 }
8029 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8030 return -res.status;
7d974794
BS		 8031}
8032
38527b15
CL		 8033/**
8034 * nfs41_test_stateid - perform a TEST_STATEID operation
8035 *
8036 * @server: server / transport on which to perform the operation
8037 * @stateid: state ID to test
ab7cb0df 8038 * @cred: credential
38527b15
CL		 8039 *
8040 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8041 * Otherwise a negative NFS4ERR value is returned if the operation
8042 * failed or the state ID is not currently valid.
8043 */
ab7cb0df
TM		 8044static int nfs41_test_stateid(struct nfs_server *server,
8045 nfs4_stateid *stateid,
8046 struct rpc_cred *cred)
7d974794
BS		 8047{
8048 struct nfs4_exception exception = { };
8049 int err;
8050 do {
ab7cb0df 8051 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8052 if (err != -NFS4ERR_DELAY)
8053 break;
8054 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8055 } while (exception.retry);
8056 return err;
8057}
9aeda35f 8058
7c1d5fae
TM		 8059struct nfs_free_stateid_data {
8060 struct nfs_server *server;
8061 struct nfs41_free_stateid_args args;
9aeda35f 8062 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8063};
8064
8065static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8066{
8067 struct nfs_free_stateid_data *data = calldata;
8068 nfs41_setup_sequence(nfs4_get_session(data->server),
8069 &data->args.seq_args,
8070 &data->res.seq_res,
8071 task);
8072}
8073
8074static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8075{
8076 struct nfs_free_stateid_data *data = calldata;
8077
8078 nfs41_sequence_done(task, &data->res.seq_res);
8079
8080 switch (task->tk_status) {
8081 case -NFS4ERR_DELAY:
8082 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8083 rpc_restart_call_prepare(task);
8084 }
8085}
8086
8087static void nfs41_free_stateid_release(void *calldata)
8088{
8089 kfree(calldata);
8090}
8091
17f26b12 8092static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8093 .rpc_call_prepare = nfs41_free_stateid_prepare,
8094 .rpc_call_done = nfs41_free_stateid_done,
8095 .rpc_release = nfs41_free_stateid_release,
8096};
8097
8098static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8099 nfs4_stateid *stateid,
ab7cb0df 8100 struct rpc_cred *cred,
7c1d5fae
TM		 8101 bool privileged)
8102{
9aeda35f
BS		 8103 struct rpc_message msg = {
8104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8105 .rpc_cred = cred,
9aeda35f 8106 };
7c1d5fae
TM		 8107 struct rpc_task_setup task_setup = {
8108 .rpc_client = server->client,
8109 .rpc_message = &msg,
8110 .callback_ops = &nfs41_free_stateid_ops,
8111 .flags = RPC_TASK_ASYNC,
8112 };
8113 struct nfs_free_stateid_data *data;
9aeda35f 8114
3787d506
WAA		 8115 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8116 &task_setup.rpc_client, &msg);
8117
38527b15 8118 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8119 data = kmalloc(sizeof(*data), GFP_NOFS);
8120 if (!data)
8121 return ERR_PTR(-ENOMEM);
8122 data->server = server;
8123 nfs4_stateid_copy(&data->args.stateid, stateid);
8124
8125 task_setup.callback_data = data;
8126
8127 msg.rpc_argp = &data->args;
8128 msg.rpc_resp = &data->res;
a9c92d6b 8129 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8130 if (privileged)
8131 nfs4_set_sequence_privileged(&data->args.seq_args);
8132
8133 return rpc_run_task(&task_setup);
9aeda35f
BS		 8134}
8135
38527b15
CL		 8136/**
8137 * nfs41_free_stateid - perform a FREE_STATEID operation
8138 *
8139 * @server: server / transport on which to perform the operation
8140 * @stateid: state ID to release
ab7cb0df 8141 * @cred: credential
38527b15
CL		 8142 *
8143 * Returns NFS_OK if the server freed "stateid". Otherwise a
8144 * negative NFS4ERR value is returned.
8145 */
ab7cb0df
TM		 8146static int nfs41_free_stateid(struct nfs_server *server,
8147 nfs4_stateid *stateid,
8148 struct rpc_cred *cred)
9aeda35f 8149{
7c1d5fae
TM		 8150 struct rpc_task *task;
8151 int ret;
8152
ab7cb0df 8153 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8154 if (IS_ERR(task))
8155 return PTR_ERR(task);
8156 ret = rpc_wait_for_completion_task(task);
8157 if (!ret)
8158 ret = task->tk_status;
8159 rpc_put_task(task);
8160 return ret;
9aeda35f 8161}
36281caa 8162
c8b2d0bf
TM		 8163static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8164{
8165 struct rpc_task *task;
ab7cb0df 8166 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8167
ab7cb0df 8168 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8169 nfs4_free_lock_state(server, lsp);
8170 if (IS_ERR(task))
8171 return PTR_ERR(task);
8172 rpc_put_task(task);
8173 return 0;
8174}
8175
36281caa
TM		 8176static bool nfs41_match_stateid(const nfs4_stateid *s1,
8177 const nfs4_stateid *s2)
8178{
2d2f24ad 8179 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8180 return false;
8181
2d2f24ad 8182 if (s1->seqid == s2->seqid)
36281caa 8183 return true;
2d2f24ad 8184 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8185 return true;
8186
8187 return false;
8188}
8189
557134a3
AA		 8190#endif /* CONFIG_NFS_V4_1 */
8191
36281caa
TM		 8192static bool nfs4_match_stateid(const nfs4_stateid *s1,
8193 const nfs4_stateid *s2)
8194{
f597c537 8195 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8196}
8197
8198
17280175 8199static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8200 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8201 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8202 .recover_open = nfs4_open_reclaim,
8203 .recover_lock = nfs4_lock_reclaim,
591d71cb 8204 .establish_clid = nfs4_init_clientid,
05f4c350 8205 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8206};
8207
591d71cb 8208#if defined(CONFIG_NFS_V4_1)
17280175 8209static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8210 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8211 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8212 .recover_open = nfs4_open_reclaim,
8213 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8214 .establish_clid = nfs41_init_clientid,
fce5c838 8215 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8216 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8217};
8218#endif /* CONFIG_NFS_V4_1 */
8219
17280175 8220static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8221 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8222 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8223 .recover_open = nfs4_open_expired,
8224 .recover_lock = nfs4_lock_expired,
8225 .establish_clid = nfs4_init_clientid,
8226};
8227
8228#if defined(CONFIG_NFS_V4_1)
17280175 8229static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8230 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8231 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8232 .recover_open = nfs41_open_expired,
8233 .recover_lock = nfs41_lock_expired,
4d643d1d 8234 .establish_clid = nfs41_init_clientid,
1da177e4 8235};
591d71cb 8236#endif /* CONFIG_NFS_V4_1 */
1da177e4 8237
17280175 8238static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8239 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8240 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8241 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8242};
8243
8244#if defined(CONFIG_NFS_V4_1)
17280175 8245static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8246 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8247 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8248 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8249};
8250#endif
8251
ec011fe8 8252static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8253 .get_locations = _nfs40_proc_get_locations,
44c99933 8254 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8255};
8256
8257#if defined(CONFIG_NFS_V4_1)
8258static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8259 .get_locations = _nfs41_proc_get_locations,
44c99933 8260 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8261};
8262#endif /* CONFIG_NFS_V4_1 */
8263
97dc1359
TM		 8264static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8265 .minor_version = 0,
39c6daae
TM		 8266 .init_caps = NFS_CAP_READDIRPLUS
8267 | NFS_CAP_ATOMIC_OPEN
8268 | NFS_CAP_CHANGE_ATTR
8269 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8270 .init_client = nfs40_init_client,
8271 .shutdown_client = nfs40_shutdown_client,
36281caa 8272 .match_stateid = nfs4_match_stateid,
fca78d6d 8273 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8274 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8275 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8276 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8277 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8278 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8279 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8280};
8281
8282#if defined(CONFIG_NFS_V4_1)
8283static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8284 .minor_version = 1,
39c6daae
TM		 8285 .init_caps = NFS_CAP_READDIRPLUS
8286 | NFS_CAP_ATOMIC_OPEN
8287 | NFS_CAP_CHANGE_ATTR
3b66486c 8288 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8289 | NFS_CAP_STATEID_NFSV41
8290 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8291 .init_client = nfs41_init_client,
8292 .shutdown_client = nfs41_shutdown_client,
36281caa 8293 .match_stateid = nfs41_match_stateid,
fca78d6d 8294 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8295 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8296 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8297 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8298 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8299 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8300 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8301};
8302#endif
8303
42c2c424
SD		 8304#if defined(CONFIG_NFS_V4_2)
8305static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8306 .minor_version = 2,
7017310a
BS		 8307 .init_caps = NFS_CAP_READDIRPLUS
8308 | NFS_CAP_ATOMIC_OPEN
8309 | NFS_CAP_CHANGE_ATTR
8310 | NFS_CAP_POSIX_LOCK
8311 | NFS_CAP_STATEID_NFSV41
8312 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8313 .init_client = nfs41_init_client,
8314 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8315 .match_stateid = nfs41_match_stateid,
8316 .find_root_sec = nfs41_find_root_sec,
7017310a 8317 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8318 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8319 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8320 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8321 .state_renewal_ops = &nfs41_state_renewal_ops,
8322};
8323#endif
8324
97dc1359
TM		 8325const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8326 [0] = &nfs_v4_0_minor_ops,
8327#if defined(CONFIG_NFS_V4_1)
8328 [1] = &nfs_v4_1_minor_ops,
8329#endif
42c2c424
SD		 8330#if defined(CONFIG_NFS_V4_2)
8331 [2] = &nfs_v4_2_minor_ops,
8332#endif
97dc1359
TM		 8333};
8334
17f26b12 8335static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8336 .create = nfs_create,
8337 .lookup = nfs_lookup,
8338 .atomic_open = nfs_atomic_open,
8339 .link = nfs_link,
8340 .unlink = nfs_unlink,
8341 .symlink = nfs_symlink,
8342 .mkdir = nfs_mkdir,
8343 .rmdir = nfs_rmdir,
8344 .mknod = nfs_mknod,
8345 .rename = nfs_rename,
8346 .permission = nfs_permission,
8347 .getattr = nfs_getattr,
8348 .setattr = nfs_setattr,
8349 .getxattr = generic_getxattr,
8350 .setxattr = generic_setxattr,
8351 .listxattr = generic_listxattr,
8352 .removexattr = generic_removexattr,
8353};
8354
92e1d5be 8355static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8356 .permission = nfs_permission,
8357 .getattr = nfs_getattr,
8358 .setattr = nfs_setattr,
64c2ce8b
AK		 8359 .getxattr = generic_getxattr,
8360 .setxattr = generic_setxattr,
8361 .listxattr = generic_listxattr,
8362 .removexattr = generic_removexattr,
6b3b5496
BF		 8363};
8364
509de811 8365const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8366 .version = 4, /* protocol version */
8367 .dentry_ops = &nfs4_dentry_operations,
8368 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8369 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8370 .file_ops = &nfs4_file_operations,
1da177e4 8371 .getroot = nfs4_proc_get_root,
281cad46 8372 .submount = nfs4_submount,
ff9099f2 8373 .try_mount = nfs4_try_mount,
1da177e4
LT		 8374 .getattr = nfs4_proc_getattr,
8375 .setattr = nfs4_proc_setattr,
8376 .lookup = nfs4_proc_lookup,
8377 .access = nfs4_proc_access,
8378 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8379 .create = nfs4_proc_create,
8380 .remove = nfs4_proc_remove,
8381 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8382 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8383 .unlink_done = nfs4_proc_unlink_done,
8384 .rename = nfs4_proc_rename,
d3d4152a 8385 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8386 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8387 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8388 .link = nfs4_proc_link,
8389 .symlink = nfs4_proc_symlink,
8390 .mkdir = nfs4_proc_mkdir,
8391 .rmdir = nfs4_proc_remove,
8392 .readdir = nfs4_proc_readdir,
8393 .mknod = nfs4_proc_mknod,
8394 .statfs = nfs4_proc_statfs,
8395 .fsinfo = nfs4_proc_fsinfo,
8396 .pathconf = nfs4_proc_pathconf,
e9326dca 8397 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8398 .decode_dirent = nfs4_decode_dirent,
8399 .read_setup = nfs4_proc_read_setup,
1abb5088 8400 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8401 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8402 .read_done = nfs4_read_done,
1da177e4 8403 .write_setup = nfs4_proc_write_setup,
57208fa7 8404 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8405 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8406 .write_done = nfs4_write_done,
1da177e4 8407 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8408 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8409 .commit_done = nfs4_commit_done,
1da177e4 8410 .lock = nfs4_proc_lock,
e50a1c2e 8411 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8412 .close_context = nfs4_close_context,
2b484297 8413 .open_context = nfs4_atomic_open,
011e2a7f 8414 .have_delegation = nfs4_have_delegation,
57ec14c5 8415 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8416 .alloc_client = nfs4_alloc_client,
45a52a02 8417 .init_client = nfs4_init_client,
cdb7eced 8418 .free_client = nfs4_free_client,
1179acc6
BS		 8419 .create_server = nfs4_create_server,
8420 .clone_server = nfs_clone_server,
1da177e4
LT		 8421};
8422
64c2ce8b
AK		 8423static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8424 .prefix = XATTR_NAME_NFSV4_ACL,
8425 .list = nfs4_xattr_list_nfs4_acl,
8426 .get = nfs4_xattr_get_nfs4_acl,
8427 .set = nfs4_xattr_set_nfs4_acl,
8428};
8429
8430const struct xattr_handler *nfs4_xattr_handlers[] = {
8431 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8432#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8433 &nfs4_xattr_nfs4_label_handler,
8434#endif
64c2ce8b
AK		 8435 NULL
8436};
8437
1da177e4
LT		 8438/*
8439 * Local variables:
8440 * c-basic-offset: 8
8441 * End:
8442 */
Linux 6.x block layer and io_uring tree(s)