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nfs: increase size of EXCHANGE_ID name string buffer
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
011e2a7f 359 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 360 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 361 exception->retry = 1;
362 return 0;
363 }
364 if (state == NULL)
365 break;
5d422301
TM		 366 ret = nfs4_schedule_stateid_recovery(server, state);
367 if (ret < 0)
368 break;
3114ea7a 369 goto wait_on_recovery;
a1d0b5ee 370 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 371 case -NFS4ERR_ADMIN_REVOKED:
372 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 373 if (state == NULL)
374 break;
5d422301
TM		 375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
0400a6b0 378 goto wait_on_recovery;
0ced63d1 379 case -NFS4ERR_EXPIRED:
5d422301
TM		 380 if (state != NULL) {
381 ret = nfs4_schedule_stateid_recovery(server, state);
382 if (ret < 0)
383 break;
384 }
65de872e 385 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 386 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 387 nfs4_schedule_lease_recovery(clp);
388 goto wait_on_recovery;
519ae255
CL		 389 case -NFS4ERR_MOVED:
390 ret = nfs4_schedule_migration_recovery(server);
391 if (ret < 0)
392 break;
393 goto wait_on_recovery;
8ef2f8d4
CL		 394 case -NFS4ERR_LEASE_MOVED:
395 nfs4_schedule_lease_moved_recovery(clp);
396 goto wait_on_recovery;
03391693 397#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 398 case -NFS4ERR_BADSESSION:
399 case -NFS4ERR_BADSLOT:
400 case -NFS4ERR_BAD_HIGH_SLOT:
401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
402 case -NFS4ERR_DEADSESSION:
403 case -NFS4ERR_SEQ_FALSE_RETRY:
404 case -NFS4ERR_SEQ_MISORDERED:
405 dprintk("%s ERROR: %d Reset session\n", __func__,
406 errorcode);
9f594791 407 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 408 goto wait_on_recovery;
03391693 409#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 410 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 411 if (exception->timeout > HZ) {
412 /* We have retried a decent amount, time to
413 * fail
414 */
415 ret = -EBUSY;
416 break;
417 }
65de872e
TM		 418 case -NFS4ERR_GRACE:
419 case -NFS4ERR_DELAY:
420 ret = nfs4_delay(server->client, &exception->timeout);
421 if (ret != 0)
422 break;
a8a4ae3a 423 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 424 case -NFS4ERR_OLD_STATEID:
425 exception->retry = 1;
b064eca2
TM		 426 break;
427 case -NFS4ERR_BADOWNER:
428 /* The following works around a Linux server bug! */
429 case -NFS4ERR_BADNAME:
430 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
431 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
432 exception->retry = 1;
433 printk(KERN_WARNING "NFS: v4 server %s "
434 "does not accept raw "
435 "uid/gids. "
436 "Reenabling the idmapper.\n",
437 server->nfs_client->cl_hostname);
438 }
65de872e
TM		 439 }
440 /* We failed to handle the error */
441 return nfs4_map_errors(ret);
0400a6b0 442wait_on_recovery:
a2c0b9e2 443 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 444 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
445 return -EIO;
a2c0b9e2
TM		 446 if (ret == 0)
447 exception->retry = 1;
448 return ret;
65de872e
TM		 449}
450
a5250def
WAA		 451/*
452 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
453 * or 'false' otherwise.
454 */
455static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
456{
457 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
458
459 if (flavor == RPC_AUTH_GSS_KRB5I ||
460 flavor == RPC_AUTH_GSS_KRB5P)
461 return true;
462
463 return false;
464}
65de872e 465
452e9352 466static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 467{
1da177e4
LT		 468 spin_lock(&clp->cl_lock);
469 if (time_before(clp->cl_last_renewal,timestamp))
470 clp->cl_last_renewal = timestamp;
471 spin_unlock(&clp->cl_lock);
472}
473
452e9352
TM		 474static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
475{
476 do_renew_lease(server->nfs_client, timestamp);
477}
478
2a3eb2b9
CL		 479struct nfs4_call_sync_data {
480 const struct nfs_server *seq_server;
481 struct nfs4_sequence_args *seq_args;
482 struct nfs4_sequence_res *seq_res;
483};
484
a9c92d6b
CL		 485static void nfs4_init_sequence(struct nfs4_sequence_args *args,
486 struct nfs4_sequence_res *res, int cache_reply)
487{
488 args->sa_slot = NULL;
489 args->sa_cache_this = cache_reply;
490 args->sa_privileged = 0;
491
492 res->sr_slot = NULL;
493}
494
495static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
496{
497 args->sa_privileged = 1;
498}
499
cb04ad2a
PT		 500int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
501 struct nfs4_sequence_args *args,
502 struct nfs4_sequence_res *res,
503 struct rpc_task *task)
3bd2384a 504{
3bd2384a
CL		 505 struct nfs4_slot *slot;
506
507 /* slot already allocated? */
508 if (res->sr_slot != NULL)
509 goto out_start;
510
511 spin_lock(&tbl->slot_tbl_lock);
512 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
513 goto out_sleep;
514
515 slot = nfs4_alloc_slot(tbl);
516 if (IS_ERR(slot)) {
517 if (slot == ERR_PTR(-ENOMEM))
518 task->tk_timeout = HZ >> 2;
519 goto out_sleep;
520 }
521 spin_unlock(&tbl->slot_tbl_lock);
522
523 args->sa_slot = slot;
524 res->sr_slot = slot;
525
526out_start:
527 rpc_call_start(task);
528 return 0;
529
530out_sleep:
531 if (args->sa_privileged)
532 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
533 NULL, RPC_PRIORITY_PRIVILEGED);
534 else
535 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
536 spin_unlock(&tbl->slot_tbl_lock);
537 return -EAGAIN;
538}
cb04ad2a 539EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 540
541static int nfs40_sequence_done(struct rpc_task *task,
542 struct nfs4_sequence_res *res)
543{
544 struct nfs4_slot *slot = res->sr_slot;
545 struct nfs4_slot_table *tbl;
546
cab92c19 547 if (slot == NULL)
3bd2384a
CL		 548 goto out;
549
550 tbl = slot->table;
551 spin_lock(&tbl->slot_tbl_lock);
552 if (!nfs41_wake_and_assign_slot(tbl, slot))
553 nfs4_free_slot(tbl, slot);
554 spin_unlock(&tbl->slot_tbl_lock);
555
556 res->sr_slot = NULL;
557out:
558 return 1;
559}
560
cccef3b9
AA		 561#if defined(CONFIG_NFS_V4_1)
562
d185a334 563static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 564{
e3725ec0 565 struct nfs4_session *session;
13615871 566 struct nfs4_slot_table *tbl;
a13ce7c6 567 struct nfs4_slot *slot = res->sr_slot;
c10e4498 568 bool send_new_highest_used_slotid = false;
13615871 569
a13ce7c6 570 tbl = slot->table;
e3725ec0 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
a13ce7c6 580 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 581 send_new_highest_used_slotid = false;
582 goto out_unlock;
583 }
a13ce7c6 584 nfs4_free_slot(tbl, 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
f9c96fcc 595int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 596{
e3725ec0 597 struct nfs4_session *session;
a13ce7c6 598 struct nfs4_slot *slot = res->sr_slot;
14516c3a 599 struct nfs_client *clp;
ac20d163 600 bool interrupted = false;
85563073 601 int ret = 1;
b0df806c 602
a13ce7c6
TM		 603 if (slot == NULL)
604 goto out_noaction;
468f8613
BS		 605 /* don't increment the sequence number if the task wasn't sent */
606 if (!RPC_WAS_SENT(task))
b0df806c
AA		 607 goto out;
608
e3725ec0 609 session = slot->table->session;
933602e3 610
ac20d163
TM		 611 if (slot->interrupted) {
612 slot->interrupted = 0;
613 interrupted = true;
614 }
615
2f92ae34 616 trace_nfs4_sequence_done(session, res);
691daf3b 617 /* Check the SEQUENCE operation status */
14516c3a
TM		 618 switch (res->sr_status) {
619 case 0:
b0df806c 620 /* Update the slot's sequence and clientid lease timer */
933602e3 621 ++slot->seq_nr;
e3725ec0 622 clp = session->clp;
8e63b6a8 623 do_renew_lease(clp, res->sr_timestamp);
0629e370 624 /* Check sequence flags */
b4410c2f
TM		 625 if (res->sr_status_flags != 0)
626 nfs4_schedule_lease_recovery(clp);
464ee9f9 627 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 628 break;
ac20d163
TM		 629 case 1:
630 /*
631 * sr_status remains 1 if an RPC level error occurred.
632 * The server may or may not have processed the sequence
633 * operation..
634 * Mark the slot as having hosted an interrupted RPC call.
635 */
636 slot->interrupted = 1;
637 goto out;
14516c3a
TM		 638 case -NFS4ERR_DELAY:
639 /* The server detected a resend of the RPC call and
640 * returned NFS4ERR_DELAY as per Section 2.10.6.2
641 * of RFC5661.
642 */
df2fabff 643 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 644 __func__,
df2fabff 645 slot->slot_nr,
933602e3 646 slot->seq_nr);
14516c3a 647 goto out_retry;
85563073
TM		 648 case -NFS4ERR_BADSLOT:
649 /*
650 * The slot id we used was probably retired. Try again
651 * using a different slot id.
652 */
e8794440
TM		 653 goto retry_nowait;
654 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 655 /*
656 * Was the last operation on this sequence interrupted?
657 * If so, retry after bumping the sequence number.
658 */
659 if (interrupted) {
660 ++slot->seq_nr;
661 goto retry_nowait;
662 }
e8794440
TM		 663 /*
664 * Could this slot have been previously retired?
665 * If so, then the server may be expecting seq_nr = 1!
666 */
8e63b6a8
TM		 667 if (slot->seq_nr != 1) {
668 slot->seq_nr = 1;
669 goto retry_nowait;
670 }
671 break;
e8794440
TM		 672 case -NFS4ERR_SEQ_FALSE_RETRY:
673 ++slot->seq_nr;
674 goto retry_nowait;
14516c3a
TM		 675 default:
676 /* Just update the slot sequence no. */
933602e3 677 ++slot->seq_nr;
b0df806c
AA		 678 }
679out:
680 /* The session may be reset by one of the error handlers. */
681 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 682 nfs41_sequence_free_slot(res);
a13ce7c6 683out_noaction:
85563073 684 return ret;
e8794440
TM		 685retry_nowait:
686 if (rpc_restart_call_prepare(task)) {
687 task->tk_status = 0;
688 ret = 0;
689 }
690 goto out;
14516c3a 691out_retry:
d05dd4e9 692 if (!rpc_restart_call(task))
14516c3a
TM		 693 goto out;
694 rpc_delay(task, NFS4_POLL_RETRY_MAX);
695 return 0;
b0df806c 696}
f9c96fcc 697EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 698
2c4b131d 699int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 700{
e3725ec0 701 if (res->sr_slot == NULL)
14516c3a 702 return 1;
3bd2384a
CL		 703 if (!res->sr_slot->table->session)
704 return nfs40_sequence_done(task, res);
14516c3a 705 return nfs41_sequence_done(task, res);
df896455 706}
2c4b131d 707EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 708
dc70d7b3 709int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 710 struct nfs4_sequence_args *args,
711 struct nfs4_sequence_res *res,
ce5039c1
AA		 712 struct rpc_task *task)
713{
fbcd4abc
AA		 714 struct nfs4_slot *slot;
715 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 716
717 dprintk("--> %s\n", __func__);
ce5039c1 718 /* slot already allocated? */
dfb4f309 719 if (res->sr_slot != NULL)
d9afbd1b 720 goto out_success;
ce5039c1 721
fbcd4abc
AA		 722 tbl = &session->fc_slot_table;
723
69d206b5
TM		 724 task->tk_timeout = 0;
725
fbcd4abc 726 spin_lock(&tbl->slot_tbl_lock);
774d5f14 727 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 728 !args->sa_privileged) {
0b1c8fc4 729 /* The state manager will wait until the slot table is empty */
0b1c8fc4 730 dprintk("%s session is draining\n", __func__);
7b939a3f 731 goto out_sleep;
689cf5c1
AB		 732 }
733
2dc03b7f 734 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 735 if (IS_ERR(slot)) {
736 /* If out of memory, try again in 1/4 second */
737 if (slot == ERR_PTR(-ENOMEM))
738 task->tk_timeout = HZ >> 2;
fbcd4abc 739 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 740 goto out_sleep;
fbcd4abc
AA		 741 }
742 spin_unlock(&tbl->slot_tbl_lock);
743
2b2fa717 744 args->sa_slot = slot;
fbcd4abc 745
e8d92382 746 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 747 slot->slot_nr, slot->seq_nr);
fbcd4abc 748
dfb4f309 749 res->sr_slot = slot;
8e63b6a8 750 res->sr_timestamp = jiffies;
2a6e26cd 751 res->sr_status_flags = 0;
fbcd4abc
AA		 752 /*
753 * sr_status is only set in decode_sequence, and so will remain
754 * set to 1 if an rpc level failure occurs.
755 */
756 res->sr_status = 1;
2f92ae34 757 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 758out_success:
759 rpc_call_start(task);
ce5039c1 760 return 0;
7b939a3f 761out_sleep:
8fe72bac
TM		 762 /* Privileged tasks are queued with top priority */
763 if (args->sa_privileged)
1e1093c7
TM		 764 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
765 NULL, RPC_PRIORITY_PRIVILEGED);
766 else
767 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 768 spin_unlock(&tbl->slot_tbl_lock);
769 return -EAGAIN;
ce5039c1 770}
dc70d7b3 771EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 772
5a580e0a
CL		 773static int nfs4_setup_sequence(const struct nfs_server *server,
774 struct nfs4_sequence_args *args,
775 struct nfs4_sequence_res *res,
776 struct rpc_task *task)
ce5039c1 777{
035168ab 778 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 779 int ret = 0;
780
3bd2384a 781 if (!session)
cb04ad2a
PT		 782 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
783 args, res, task);
035168ab 784
e8d92382 785 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 786 __func__, session->clp, session, res->sr_slot ?
e8d92382 787 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 788
9d12b216 789 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 790
ce5039c1
AA		 791 dprintk("<-- %s status=%d\n", __func__, ret);
792 return ret;
793}
794
ce5039c1
AA		 795static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
796{
2a3eb2b9 797 struct nfs4_call_sync_data *data = calldata;
6ba7db34 798 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 799
035168ab
TM		 800 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
801
d9afbd1b 802 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 803}
804
69ab40c4
AA		 805static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
806{
2a3eb2b9 807 struct nfs4_call_sync_data *data = calldata;
69ab40c4 808
14516c3a 809 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 810}
811
17280175 812static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 813 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 814 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 815};
816
3bd2384a
CL		 817#else /* !CONFIG_NFS_V4_1 */
818
9915ea7e
CL		 819static int nfs4_setup_sequence(const struct nfs_server *server,
820 struct nfs4_sequence_args *args,
821 struct nfs4_sequence_res *res,
822 struct rpc_task *task)
823{
cb04ad2a
PT		 824 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
825 args, res, task);
9915ea7e
CL		 826}
827
2c4b131d
PT		 828int nfs4_sequence_done(struct rpc_task *task,
829 struct nfs4_sequence_res *res)
9915ea7e 830{
3bd2384a 831 return nfs40_sequence_done(task, res);
9915ea7e 832}
2c4b131d 833EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 834
835#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 836
837static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
838{
839 struct nfs4_call_sync_data *data = calldata;
840 nfs4_setup_sequence(data->seq_server,
841 data->seq_args, data->seq_res, task);
842}
843
844static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
845{
846 struct nfs4_call_sync_data *data = calldata;
847 nfs4_sequence_done(task, data->seq_res);
848}
849
850static const struct rpc_call_ops nfs40_call_sync_ops = {
851 .rpc_call_prepare = nfs40_call_sync_prepare,
852 .rpc_call_done = nfs40_call_sync_done,
853};
854
7c513058
BS		 855static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
856 struct nfs_server *server,
ce5039c1
AA		 857 struct rpc_message *msg,
858 struct nfs4_sequence_args *args,
8fe72bac 859 struct nfs4_sequence_res *res)
ce5039c1
AA		 860{
861 int ret;
862 struct rpc_task *task;
9915ea7e 863 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 864 struct nfs4_call_sync_data data = {
035168ab 865 .seq_server = server,
ce5039c1
AA		 866 .seq_args = args,
867 .seq_res = res,
ce5039c1
AA		 868 };
869 struct rpc_task_setup task_setup = {
7c513058 870 .rpc_client = clnt,
ce5039c1 871 .rpc_message = msg,
9915ea7e 872 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 873 .callback_data = &data
874 };
875
ce5039c1
AA		 876 task = rpc_run_task(&task_setup);
877 if (IS_ERR(task))
878 ret = PTR_ERR(task);
879 else {
880 ret = task->tk_status;
881 rpc_put_task(task);
882 }
883 return ret;
884}
885
7c513058
BS		 886int nfs4_call_sync(struct rpc_clnt *clnt,
887 struct nfs_server *server,
e73b83f2
BS		 888 struct rpc_message *msg,
889 struct nfs4_sequence_args *args,
890 struct nfs4_sequence_res *res,
891 int cache_reply)
892{
a9c92d6b 893 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 894 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 895}
cccef3b9 896
38478b24 897static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 898{
38478b24 899 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 900
38478b24 901 spin_lock(&dir->i_lock);
359d7d1c 902 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 903 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 904 nfs_force_lookup_revalidate(dir);
a9a4a87a 905 dir->i_version = cinfo->after;
3235b403 906 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 907 nfs_fscache_invalidate(dir);
38478b24 908 spin_unlock(&dir->i_lock);
1da177e4
LT		 909}
910
e56e0b78 911struct nfs4_opendata {
c6d00e63 912 struct kref kref;
e56e0b78
TM		 913 struct nfs_openargs o_arg;
914 struct nfs_openres o_res;
cdd4e68b
TM		 915 struct nfs_open_confirmargs c_arg;
916 struct nfs_open_confirmres c_res;
6926afd1
TM		 917 struct nfs4_string owner_name;
918 struct nfs4_string group_name;
e56e0b78 919 struct nfs_fattr f_attr;
1775fd3e 920 struct nfs4_label *f_label;
e56e0b78 921 struct dentry *dir;
82a2c1b7 922 struct dentry *dentry;
e56e0b78 923 struct nfs4_state_owner *owner;
aac00a8d 924 struct nfs4_state *state;
e56e0b78 925 struct iattr attrs;
26e976a8 926 unsigned long timestamp;
3e309914 927 unsigned int rpc_done : 1;
5bc2afc2 928 unsigned int file_created : 1;
bdeca1b7 929 unsigned int is_recover : 1;
24ac23ab
TM		 930 int rpc_status;
931 int cancelled;
e56e0b78
TM		 932};
933
49f9a0fa
TM		 934static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
935 int err, struct nfs4_exception *exception)
936{
937 if (err != -EINVAL)
938 return false;
939 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
940 return false;
941 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
942 exception->retry = 1;
943 return true;
944}
945
6ae37339
TM		 946static u32
947nfs4_map_atomic_open_share(struct nfs_server *server,
948 fmode_t fmode, int openflags)
949{
950 u32 res = 0;
951
952 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
953 case FMODE_READ:
954 res = NFS4_SHARE_ACCESS_READ;
955 break;
956 case FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_WRITE;
958 break;
959 case FMODE_READ|FMODE_WRITE:
960 res = NFS4_SHARE_ACCESS_BOTH;
961 }
962 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
963 goto out;
964 /* Want no delegation if we're using O_DIRECT */
965 if (openflags & O_DIRECT)
966 res |= NFS4_SHARE_WANT_NO_DELEG;
967out:
968 return res;
969}
970
49f9a0fa
TM		 971static enum open_claim_type4
972nfs4_map_atomic_open_claim(struct nfs_server *server,
973 enum open_claim_type4 claim)
974{
975 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
976 return claim;
977 switch (claim) {
978 default:
979 return claim;
980 case NFS4_OPEN_CLAIM_FH:
981 return NFS4_OPEN_CLAIM_NULL;
982 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
983 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
984 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
985 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
986 }
987}
2ced46c2
TM		 988
989static void nfs4_init_opendata_res(struct nfs4_opendata *p)
990{
991 p->o_res.f_attr = &p->f_attr;
1775fd3e 992 p->o_res.f_label = p->f_label;
c1d51931
TM		 993 p->o_res.seqid = p->o_arg.seqid;
994 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 995 p->o_res.server = p->o_arg.server;
5f657530 996 p->o_res.access_request = p->o_arg.access;
2ced46c2 997 nfs_fattr_init(&p->f_attr);
6926afd1 998 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 999}
1000
82a2c1b7 1001static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1002 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1003 const struct iattr *attrs,
1775fd3e 1004 struct nfs4_label *label,
4a1c0893 1005 enum open_claim_type4 claim,
8535b2be 1006 gfp_t gfp_mask)
e56e0b78 1007{
82a2c1b7 1008 struct dentry *parent = dget_parent(dentry);
2b0143b5 1009 struct inode *dir = d_inode(parent);
e56e0b78 1010 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1011 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1012 struct nfs4_opendata *p;
1013
8535b2be 1014 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1015 if (p == NULL)
1016 goto err;
14c43f76
DQ		 1017
1018 p->f_label = nfs4_label_alloc(server, gfp_mask);
1019 if (IS_ERR(p->f_label))
1020 goto err_free_p;
1021
63f5f796
TM		 1022 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1023 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1024 if (IS_ERR(p->o_arg.seqid))
14c43f76 1025 goto err_free_label;
82a2c1b7
AV		 1026 nfs_sb_active(dentry->d_sb);
1027 p->dentry = dget(dentry);
e56e0b78
TM		 1028 p->dir = parent;
1029 p->owner = sp;
1030 atomic_inc(&sp->so_count);
dc0b027d
TM		 1031 p->o_arg.open_flags = flags;
1032 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1033 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1034 fmode, flags);
ae2bb032
WAA		 1035 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1036 * will return permission denied for all bits until close */
1037 if (!(flags & O_EXCL)) {
1038 /* ask server to check for all possible rights as results
1039 * are cached */
1040 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1041 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1042 }
7539bbab 1043 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1044 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1045 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1046 p->o_arg.name = &dentry->d_name;
e56e0b78 1047 p->o_arg.server = server;
aa9c2669 1048 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1049 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1050 p->o_arg.label = label;
49f9a0fa
TM		 1051 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1052 switch (p->o_arg.claim) {
4a1c0893
TM		 1053 case NFS4_OPEN_CLAIM_NULL:
1054 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1055 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1056 p->o_arg.fh = NFS_FH(dir);
1057 break;
1058 case NFS4_OPEN_CLAIM_PREVIOUS:
1059 case NFS4_OPEN_CLAIM_FH:
1060 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1062 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1063 }
536e43d1 1064 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1065 __u32 verf[2];
d77d76ff 1066
e56e0b78
TM		 1067 p->o_arg.u.attrs = &p->attrs;
1068 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1069
1070 verf[0] = jiffies;
1071 verf[1] = current->pid;
1072 memcpy(p->o_arg.u.verifier.data, verf,
1073 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1074 }
cdd4e68b
TM		 1075 p->c_arg.fh = &p->o_res.fh;
1076 p->c_arg.stateid = &p->o_res.stateid;
1077 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1078 nfs4_init_opendata_res(p);
c6d00e63 1079 kref_init(&p->kref);
e56e0b78 1080 return p;
14c43f76
DQ		 1081
1082err_free_label:
1083 nfs4_label_free(p->f_label);
1084err_free_p:
e56e0b78
TM		 1085 kfree(p);
1086err:
1087 dput(parent);
1088 return NULL;
1089}
1090
c6d00e63 1091static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1092{
c6d00e63
TM		 1093 struct nfs4_opendata *p = container_of(kref,
1094 struct nfs4_opendata, kref);
82a2c1b7 1095 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1096
1097 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1098 if (p->state != NULL)
1099 nfs4_put_open_state(p->state);
c6d00e63 1100 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1101
1102 nfs4_label_free(p->f_label);
1103
c6d00e63 1104 dput(p->dir);
82a2c1b7
AV		 1105 dput(p->dentry);
1106 nfs_sb_deactive(sb);
6926afd1 1107 nfs_fattr_free_names(&p->f_attr);
e911b815 1108 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1109 kfree(p);
1110}
1111
1112static void nfs4_opendata_put(struct nfs4_opendata *p)
1113{
1114 if (p != NULL)
1115 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1116}
1117
06f814a3
TM		 1118static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1119{
06f814a3
TM		 1120 int ret;
1121
06f814a3 1122 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1123 return ret;
1124}
1125
dc0b027d 1126static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1127{
1128 int ret = 0;
dc0b027d 1129
536e43d1 1130 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1131 goto out;
1132 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1133 case FMODE_READ:
88069f77
TM		 1134 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1135 && state->n_rdonly != 0;
6ee41268
TM		 1136 break;
1137 case FMODE_WRITE:
88069f77
TM		 1138 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1139 && state->n_wronly != 0;
6ee41268
TM		 1140 break;
1141 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1142 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1143 && state->n_rdwr != 0;
6ee41268 1144 }
dc0b027d 1145out:
6ee41268
TM		 1146 return ret;
1147}
1148
dc0b027d 1149static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1150{
652f89f6
TM		 1151 if (delegation == NULL)
1152 return 0;
dc0b027d 1153 if ((delegation->type & fmode) != fmode)
aac00a8d 1154 return 0;
d25be546
TM		 1155 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1156 return 0;
b7391f44 1157 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1158 return 1;
1159}
1160
dc0b027d 1161static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1162{
dc0b027d 1163 switch (fmode) {
e7616923
TM		 1164 case FMODE_WRITE:
1165 state->n_wronly++;
1166 break;
1167 case FMODE_READ:
1168 state->n_rdonly++;
1169 break;
1170 case FMODE_READ|FMODE_WRITE:
1171 state->n_rdwr++;
1172 }
dc0b027d 1173 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1174}
1175
4f14c194
TM		 1176static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1177{
1178 struct nfs_client *clp = state->owner->so_server->nfs_client;
1179 bool need_recover = false;
1180
1181 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1182 need_recover = true;
1183 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1184 need_recover = true;
1185 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1186 need_recover = true;
1187 if (need_recover)
1188 nfs4_state_mark_reclaim_nograce(clp, state);
1189}
1190
e999e80e
TM		 1191static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1192 nfs4_stateid *stateid)
1193{
1194 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1195 return true;
4f14c194
TM		 1196 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1197 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1198 return true;
4f14c194 1199 }
e999e80e
TM		 1200 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1201 return true;
1202 return false;
1203}
1204
f95549cf
TM		 1205static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1206{
1207 if (state->n_wronly)
1208 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1209 if (state->n_rdonly)
1210 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1211 if (state->n_rdwr)
1212 set_bit(NFS_O_RDWR_STATE, &state->flags);
1213}
1214
226056c5
TM		 1215static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1216 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1217{
226056c5
TM		 1218 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1219 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1220 case FMODE_WRITE:
1221 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1222 break;
1223 case FMODE_READ:
1224 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1225 break;
1226 case 0:
1227 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1228 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1229 clear_bit(NFS_OPEN_STATE, &state->flags);
1230 }
1231 if (stateid == NULL)
1232 return;
f95549cf
TM		 1233 /* Handle races with OPEN */
1234 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1235 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1236 nfs_resync_open_stateid_locked(state);
226056c5 1237 return;
f95549cf 1238 }
003707c7 1239 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1240 nfs4_stateid_copy(&state->stateid, stateid);
1241 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1242}
1243
1244static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1245{
1246 write_seqlock(&state->seqlock);
1247 nfs_clear_open_stateid_locked(state, stateid, fmode);
1248 write_sequnlock(&state->seqlock);
4f14c194
TM		 1249 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1250 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1251}
1252
dc0b027d 1253static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1254{
dc0b027d 1255 switch (fmode) {
003707c7
TM		 1256 case FMODE_READ:
1257 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1258 break;
1259 case FMODE_WRITE:
1260 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1261 break;
1262 case FMODE_READ|FMODE_WRITE:
1263 set_bit(NFS_O_RDWR_STATE, &state->flags);
1264 }
e999e80e
TM		 1265 if (!nfs_need_update_open_stateid(state, stateid))
1266 return;
1267 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1268 nfs4_stateid_copy(&state->stateid, stateid);
1269 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1270}
1271
dc0b027d 1272static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1273{
8bda4e4c
TM		 1274 /*
1275 * Protect the call to nfs4_state_set_mode_locked and
1276 * serialise the stateid update
1277 */
1278 write_seqlock(&state->seqlock);
003707c7 1279 if (deleg_stateid != NULL) {
f597c537 1280 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1281 set_bit(NFS_DELEGATED_STATE, &state->flags);
1282 }
1283 if (open_stateid != NULL)
dc0b027d 1284 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1285 write_sequnlock(&state->seqlock);
1286 spin_lock(&state->owner->so_lock);
dc0b027d 1287 update_open_stateflags(state, fmode);
ec073428 1288 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1289}
1290
dc0b027d 1291static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1292{
1293 struct nfs_inode *nfsi = NFS_I(state->inode);
1294 struct nfs_delegation *deleg_cur;
1295 int ret = 0;
1296
dc0b027d 1297 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1298
1299 rcu_read_lock();
1300 deleg_cur = rcu_dereference(nfsi->delegation);
1301 if (deleg_cur == NULL)
1302 goto no_delegation;
1303
1304 spin_lock(&deleg_cur->lock);
17f26b12 1305 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1306 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1307 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1308 goto no_delegation_unlock;
1309
1310 if (delegation == NULL)
1311 delegation = &deleg_cur->stateid;
f597c537 1312 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1313 goto no_delegation_unlock;
1314
b7391f44 1315 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1316 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1317 ret = 1;
1318no_delegation_unlock:
1319 spin_unlock(&deleg_cur->lock);
1320no_delegation:
1321 rcu_read_unlock();
1322
1323 if (!ret && open_stateid != NULL) {
dc0b027d 1324 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1325 ret = 1;
1326 }
4f14c194
TM		 1327 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1328 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1329
1330 return ret;
1331}
1332
39071e6f
TM		 1333static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1334 const nfs4_stateid *stateid)
1335{
1336 struct nfs4_state *state = lsp->ls_state;
1337 bool ret = false;
1338
1339 spin_lock(&state->state_lock);
1340 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1341 goto out_noupdate;
1342 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1343 goto out_noupdate;
1344 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1345 ret = true;
1346out_noupdate:
1347 spin_unlock(&state->state_lock);
1348 return ret;
1349}
34310430 1350
dc0b027d 1351static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1352{
1353 struct nfs_delegation *delegation;
1354
1355 rcu_read_lock();
1356 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1357 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1358 rcu_read_unlock();
1359 return;
1360 }
1361 rcu_read_unlock();
57ec14c5 1362 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1363}
1364
6ee41268 1365static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1366{
1367 struct nfs4_state *state = opendata->state;
1368 struct nfs_inode *nfsi = NFS_I(state->inode);
1369 struct nfs_delegation *delegation;
f448badd 1370 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1371 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1372 nfs4_stateid stateid;
1373 int ret = -EAGAIN;
1374
aac00a8d 1375 for (;;) {
61beef75 1376 spin_lock(&state->owner->so_lock);
dc0b027d 1377 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1378 update_open_stateflags(state, fmode);
6ee41268 1379 spin_unlock(&state->owner->so_lock);
61beef75 1380 goto out_return_state;
6ee41268 1381 }
61beef75 1382 spin_unlock(&state->owner->so_lock);
34310430
TM		 1383 rcu_read_lock();
1384 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1385 if (!can_open_delegated(delegation, fmode)) {
34310430 1386 rcu_read_unlock();
aac00a8d 1387 break;
34310430 1388 }
aac00a8d 1389 /* Save the delegation */
f597c537 1390 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1391 rcu_read_unlock();
fa332941 1392 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1393 if (!opendata->is_recover) {
1394 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1395 if (ret != 0)
1396 goto out;
1397 }
aac00a8d 1398 ret = -EAGAIN;
34310430
TM		 1399
1400 /* Try to update the stateid using the delegation */
dc0b027d 1401 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1402 goto out_return_state;
aac00a8d 1403 }
aac00a8d
TM		 1404out:
1405 return ERR_PTR(ret);
1406out_return_state:
1407 atomic_inc(&state->count);
1408 return state;
1409}
1410
e23008ec
AA		 1411static void
1412nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1413{
1414 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1415 struct nfs_delegation *delegation;
1416 int delegation_flags = 0;
1417
1418 rcu_read_lock();
1419 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1420 if (delegation)
1421 delegation_flags = delegation->flags;
1422 rcu_read_unlock();
1423 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1424 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1425 "returning a delegation for "
1426 "OPEN(CLAIM_DELEGATE_CUR)\n",
1427 clp->cl_hostname);
1428 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1429 nfs_inode_set_delegation(state->inode,
1430 data->owner->so_cred,
1431 &data->o_res);
1432 else
1433 nfs_inode_reclaim_delegation(state->inode,
1434 data->owner->so_cred,
1435 &data->o_res);
1436}
1437
1438/*
1439 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1440 * and update the nfs4_state.
1441 */
1442static struct nfs4_state *
1443_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1444{
1445 struct inode *inode = data->state->inode;
1446 struct nfs4_state *state = data->state;
1447 int ret;
1448
d2bfda2e
WAA		 1449 if (!data->rpc_done) {
1450 if (data->rpc_status) {
1451 ret = data->rpc_status;
1452 goto err;
1453 }
1454 /* cached opens have already been processed */
1455 goto update;
e23008ec
AA		 1456 }
1457
e23008ec
AA		 1458 ret = nfs_refresh_inode(inode, &data->f_attr);
1459 if (ret)
1460 goto err;
1461
1462 if (data->o_res.delegation_type != 0)
1463 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1464update:
e23008ec
AA		 1465 update_open_stateid(state, &data->o_res.stateid, NULL,
1466 data->o_arg.fmode);
d49f042a 1467 atomic_inc(&state->count);
e23008ec
AA		 1468
1469 return state;
1470err:
1471 return ERR_PTR(ret);
1472
1473}
1474
1475static struct nfs4_state *
1476_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1477{
1478 struct inode *inode;
1479 struct nfs4_state *state = NULL;
1b370bc2 1480 int ret;
24ac23ab 1481
aac00a8d 1482 if (!data->rpc_done) {
6ee41268 1483 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1484 goto out;
1485 }
1486
1b370bc2 1487 ret = -EAGAIN;
24ac23ab 1488 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1489 goto err;
1775fd3e 1490 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1491 ret = PTR_ERR(inode);
03f28e3a 1492 if (IS_ERR(inode))
1b370bc2
TM		 1493 goto err;
1494 ret = -ENOMEM;
24ac23ab
TM		 1495 state = nfs4_get_open_state(inode, data->owner);
1496 if (state == NULL)
1b370bc2 1497 goto err_put_inode;
e23008ec
AA		 1498 if (data->o_res.delegation_type != 0)
1499 nfs4_opendata_check_deleg(data, state);
34310430 1500 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1501 data->o_arg.fmode);
24ac23ab 1502 iput(inode);
aac00a8d 1503out:
7aa262b5 1504 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1505 return state;
1b370bc2
TM		 1506err_put_inode:
1507 iput(inode);
1508err:
1509 return ERR_PTR(ret);
24ac23ab
TM		 1510}
1511
e23008ec
AA		 1512static struct nfs4_state *
1513nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1514{
1515 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1516 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1517 return _nfs4_opendata_to_nfs4_state(data);
1518}
1519
864472e9
TM		 1520static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1521{
1522 struct nfs_inode *nfsi = NFS_I(state->inode);
1523 struct nfs_open_context *ctx;
1524
1525 spin_lock(&state->inode->i_lock);
1526 list_for_each_entry(ctx, &nfsi->open_files, list) {
1527 if (ctx->state != state)
1528 continue;
1529 get_nfs_open_context(ctx);
1530 spin_unlock(&state->inode->i_lock);
1531 return ctx;
1532 }
1533 spin_unlock(&state->inode->i_lock);
1534 return ERR_PTR(-ENOENT);
1535}
1536
4a1c0893
TM		 1537static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1538 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1539{
1540 struct nfs4_opendata *opendata;
1541
4a1c0893 1542 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1543 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1544 if (opendata == NULL)
1545 return ERR_PTR(-ENOMEM);
1546 opendata->state = state;
1547 atomic_inc(&state->count);
1548 return opendata;
1549}
1550
dc0b027d 1551static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1552{
2ced46c2 1553 struct nfs4_state *newstate;
864472e9
TM		 1554 int ret;
1555
dc0b027d
TM		 1556 opendata->o_arg.open_flags = 0;
1557 opendata->o_arg.fmode = fmode;
be36e185
TM		 1558 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1559 NFS_SB(opendata->dentry->d_sb),
1560 fmode, 0);
2ced46c2
TM		 1561 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1562 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1563 nfs4_init_opendata_res(opendata);
b257957e 1564 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1565 if (ret != 0)
1566 return ret;
2ced46c2 1567 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1568 if (IS_ERR(newstate))
1569 return PTR_ERR(newstate);
643168c2 1570 nfs4_close_state(newstate, fmode);
2ced46c2 1571 *res = newstate;
864472e9
TM		 1572 return 0;
1573}
1574
1575static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1576{
864472e9 1577 struct nfs4_state *newstate;
864472e9
TM		 1578 int ret;
1579
4f14c194
TM		 1580 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1581 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1582 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1583 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1584 /* memory barrier prior to reading state->n_* */
2ced46c2 1585 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1586 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1587 smp_rmb();
1588 if (state->n_rdwr != 0) {
2ced46c2 1589 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1590 if (ret != 0)
1591 return ret;
2ced46c2
TM		 1592 if (newstate != state)
1593 return -ESTALE;
864472e9
TM		 1594 }
1595 if (state->n_wronly != 0) {
2ced46c2 1596 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1597 if (ret != 0)
1598 return ret;
2ced46c2
TM		 1599 if (newstate != state)
1600 return -ESTALE;
864472e9
TM		 1601 }
1602 if (state->n_rdonly != 0) {
2ced46c2 1603 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1604 if (ret != 0)
1605 return ret;
2ced46c2
TM		 1606 if (newstate != state)
1607 return -ESTALE;
864472e9 1608 }
1ac7e2fd
TM		 1609 /*
1610 * We may have performed cached opens for all three recoveries.
1611 * Check if we need to update the current stateid.
1612 */
1613 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1614 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1615 write_seqlock(&state->seqlock);
1ac7e2fd 1616 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1617 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1618 write_sequnlock(&state->seqlock);
1ac7e2fd 1619 }
864472e9
TM		 1620 return 0;
1621}
1622
1da177e4
LT		 1623/*
1624 * OPEN_RECLAIM:
1625 * reclaim state on the server after a reboot.
1da177e4 1626 */
539cd03a 1627static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1628{
1ac7e2fd 1629 struct nfs_delegation *delegation;
864472e9 1630 struct nfs4_opendata *opendata;
dc0b027d 1631 fmode_t delegation_type = 0;
1da177e4
LT		 1632 int status;
1633
4a1c0893
TM		 1634 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1635 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1636 if (IS_ERR(opendata))
1637 return PTR_ERR(opendata);
1ac7e2fd
TM		 1638 rcu_read_lock();
1639 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1640 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1641 delegation_type = delegation->type;
1ac7e2fd 1642 rcu_read_unlock();
864472e9
TM		 1643 opendata->o_arg.u.delegation_type = delegation_type;
1644 status = nfs4_open_recover(opendata, state);
c6d00e63 1645 nfs4_opendata_put(opendata);
1da177e4
LT		 1646 return status;
1647}
1648
539cd03a 1649static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1650{
1651 struct nfs_server *server = NFS_SERVER(state->inode);
1652 struct nfs4_exception exception = { };
1653 int err;
1654 do {
539cd03a 1655 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1656 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1657 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1658 continue;
168667c4 1659 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1660 break;
1661 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1662 } while (exception.retry);
1663 return err;
1664}
1665
864472e9
TM		 1666static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1667{
1668 struct nfs_open_context *ctx;
1669 int ret;
1670
1671 ctx = nfs4_state_find_open_context(state);
1672 if (IS_ERR(ctx))
91876b13 1673 return -EAGAIN;
539cd03a 1674 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1675 put_nfs_open_context(ctx);
1676 return ret;
1677}
1678
db4f2e63 1679static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1680{
be76b5b6
TM		 1681 switch (err) {
1682 default:
1683 printk(KERN_ERR "NFS: %s: unhandled error "
1684 "%d.\n", __func__, err);
1685 case 0:
1686 case -ENOENT:
1687 case -ESTALE:
1688 break;
1689 case -NFS4ERR_BADSESSION:
1690 case -NFS4ERR_BADSLOT:
1691 case -NFS4ERR_BAD_HIGH_SLOT:
1692 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1693 case -NFS4ERR_DEADSESSION:
1694 set_bit(NFS_DELEGATED_STATE, &state->flags);
1695 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1696 return -EAGAIN;
1697 case -NFS4ERR_STALE_CLIENTID:
1698 case -NFS4ERR_STALE_STATEID:
1699 set_bit(NFS_DELEGATED_STATE, &state->flags);
1700 case -NFS4ERR_EXPIRED:
1701 /* Don't recall a delegation if it was lost */
1702 nfs4_schedule_lease_recovery(server->nfs_client);
1703 return -EAGAIN;
352297b9
CL		 1704 case -NFS4ERR_MOVED:
1705 nfs4_schedule_migration_recovery(server);
1706 return -EAGAIN;
8ef2f8d4
CL		 1707 case -NFS4ERR_LEASE_MOVED:
1708 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1709 return -EAGAIN;
be76b5b6
TM		 1710 case -NFS4ERR_DELEG_REVOKED:
1711 case -NFS4ERR_ADMIN_REVOKED:
1712 case -NFS4ERR_BAD_STATEID:
db4f2e63 1713 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1714 nfs_inode_find_state_and_recover(state->inode,
1715 stateid);
1716 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1717 return -EAGAIN;
be76b5b6
TM		 1718 case -NFS4ERR_DELAY:
1719 case -NFS4ERR_GRACE:
1720 set_bit(NFS_DELEGATED_STATE, &state->flags);
1721 ssleep(1);
1722 return -EAGAIN;
db4f2e63
TM		 1723 case -ENOMEM:
1724 case -NFS4ERR_DENIED:
1725 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1726 return 0;
be76b5b6 1727 }
1da177e4
LT		 1728 return err;
1729}
1730
db4f2e63
TM		 1731int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1732{
1733 struct nfs_server *server = NFS_SERVER(state->inode);
1734 struct nfs4_opendata *opendata;
1735 int err;
1736
1737 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1738 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1739 if (IS_ERR(opendata))
1740 return PTR_ERR(opendata);
1741 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1742 err = nfs4_open_recover(opendata, state);
1743 nfs4_opendata_put(opendata);
1744 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1745}
1746
be05c860
CL		 1747static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1748{
1749 struct nfs4_opendata *data = calldata;
1750
cb04ad2a
PT		 1751 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1752 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1753}
1754
cdd4e68b
TM		 1755static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1756{
1757 struct nfs4_opendata *data = calldata;
1758
17ead6c8 1759 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1760
cdd4e68b 1761 data->rpc_status = task->tk_status;
26e976a8 1762 if (data->rpc_status == 0) {
f597c537 1763 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1764 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1765 renew_lease(data->o_res.server, data->timestamp);
3e309914 1766 data->rpc_done = 1;
26e976a8 1767 }
cdd4e68b
TM		 1768}
1769
1770static void nfs4_open_confirm_release(void *calldata)
1771{
1772 struct nfs4_opendata *data = calldata;
1773 struct nfs4_state *state = NULL;
1774
1775 /* If this request hasn't been cancelled, do nothing */
1776 if (data->cancelled == 0)
1777 goto out_free;
1778 /* In case of error, no cleanup! */
3e309914 1779 if (!data->rpc_done)
cdd4e68b 1780 goto out_free;
cdd4e68b 1781 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1782 if (!IS_ERR(state))
643168c2 1783 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1784out_free:
c6d00e63 1785 nfs4_opendata_put(data);
cdd4e68b
TM		 1786}
1787
1788static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1789 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1790 .rpc_call_done = nfs4_open_confirm_done,
1791 .rpc_release = nfs4_open_confirm_release,
1792};
1793
1794/*
1795 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1796 */
1797static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1798{
2b0143b5 1799 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1800 struct rpc_task *task;
5138fde0
TM		 1801 struct rpc_message msg = {
1802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1803 .rpc_argp = &data->c_arg,
1804 .rpc_resp = &data->c_res,
1805 .rpc_cred = data->owner->so_cred,
1806 };
c970aa85
TM		 1807 struct rpc_task_setup task_setup_data = {
1808 .rpc_client = server->client,
5138fde0 1809 .rpc_message = &msg,
c970aa85
TM		 1810 .callback_ops = &nfs4_open_confirm_ops,
1811 .callback_data = data,
101070ca 1812 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1813 .flags = RPC_TASK_ASYNC,
1814 };
1da177e4
LT		 1815 int status;
1816
17ead6c8 1817 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1818 kref_get(&data->kref);
3e309914
TM		 1819 data->rpc_done = 0;
1820 data->rpc_status = 0;
5138fde0 1821 data->timestamp = jiffies;
c970aa85 1822 task = rpc_run_task(&task_setup_data);
7a1218a2 1823 if (IS_ERR(task))
cdd4e68b 1824 return PTR_ERR(task);
cdd4e68b
TM		 1825 status = nfs4_wait_for_completion_rpc_task(task);
1826 if (status != 0) {
1827 data->cancelled = 1;
1828 smp_wmb();
1829 } else
1830 status = data->rpc_status;
e6b3c4db 1831 rpc_put_task(task);
1da177e4
LT		 1832 return status;
1833}
1834
24ac23ab 1835static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1836{
24ac23ab
TM		 1837 struct nfs4_opendata *data = calldata;
1838 struct nfs4_state_owner *sp = data->owner;
549b19cc 1839 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1840
24ac23ab 1841 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1842 goto out_wait;
aac00a8d
TM		 1843 /*
1844 * Check if we still need to send an OPEN call, or if we can use
1845 * a delegation instead.
1846 */
1847 if (data->state != NULL) {
1848 struct nfs_delegation *delegation;
1849
dc0b027d 1850 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1851 goto out_no_action;
aac00a8d
TM		 1852 rcu_read_lock();
1853 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1854 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1855 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1856 can_open_delegated(delegation, data->o_arg.fmode))
1857 goto unlock_no_action;
aac00a8d
TM		 1858 rcu_read_unlock();
1859 }
95b72eb0 1860 /* Update client id. */
549b19cc 1861 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1862 switch (data->o_arg.claim) {
1863 case NFS4_OPEN_CLAIM_PREVIOUS:
1864 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1865 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1866 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1867 case NFS4_OPEN_CLAIM_FH:
1868 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1869 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1870 }
26e976a8 1871 data->timestamp = jiffies;
035168ab 1872 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1873 &data->o_arg.seq_args,
2240a9e2
TM		 1874 &data->o_res.seq_res,
1875 task) != 0)
1876 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1877
1878 /* Set the create mode (note dependency on the session type) */
1879 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1880 if (data->o_arg.open_flags & O_EXCL) {
1881 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1882 if (nfs4_has_persistent_session(clp))
1883 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1884 else if (clp->cl_mvops->minor_version > 0)
1885 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1886 }
6ee41268 1887 return;
652f89f6
TM		 1888unlock_no_action:
1889 rcu_read_unlock();
6ee41268
TM		 1890out_no_action:
1891 task->tk_action = NULL;
c8da19b9 1892out_wait:
b75ad4cd 1893 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1894}
1895
24ac23ab
TM		 1896static void nfs4_open_done(struct rpc_task *task, void *calldata)
1897{
1898 struct nfs4_opendata *data = calldata;
1da177e4 1899
24ac23ab 1900 data->rpc_status = task->tk_status;
d898528c 1901
14516c3a
TM		 1902 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1903 return;
d898528c 1904
24ac23ab 1905 if (task->tk_status == 0) {
807d66d8
TM		 1906 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1907 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1908 case S_IFREG:
1909 break;
1910 case S_IFLNK:
24ac23ab 1911 data->rpc_status = -ELOOP;
6f926b5b
TM		 1912 break;
1913 case S_IFDIR:
24ac23ab 1914 data->rpc_status = -EISDIR;
6f926b5b
TM		 1915 break;
1916 default:
24ac23ab 1917 data->rpc_status = -ENOTDIR;
807d66d8 1918 }
6f926b5b 1919 }
26e976a8 1920 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1921 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1922 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1923 }
3e309914 1924 data->rpc_done = 1;
24ac23ab 1925}
6f926b5b 1926
24ac23ab
TM		 1927static void nfs4_open_release(void *calldata)
1928{
1929 struct nfs4_opendata *data = calldata;
1930 struct nfs4_state *state = NULL;
1931
1932 /* If this request hasn't been cancelled, do nothing */
1933 if (data->cancelled == 0)
1934 goto out_free;
1935 /* In case of error, no cleanup! */
3e309914 1936 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1937 goto out_free;
1938 /* In case we need an open_confirm, no cleanup! */
1939 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1940 goto out_free;
24ac23ab 1941 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1942 if (!IS_ERR(state))
643168c2 1943 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1944out_free:
c6d00e63 1945 nfs4_opendata_put(data);
24ac23ab
TM		 1946}
1947
1948static const struct rpc_call_ops nfs4_open_ops = {
1949 .rpc_call_prepare = nfs4_open_prepare,
1950 .rpc_call_done = nfs4_open_done,
1951 .rpc_release = nfs4_open_release,
1952};
1953
b257957e 1954static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1955{
2b0143b5 1956 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1957 struct nfs_server *server = NFS_SERVER(dir);
1958 struct nfs_openargs *o_arg = &data->o_arg;
1959 struct nfs_openres *o_res = &data->o_res;
1960 struct rpc_task *task;
5138fde0
TM		 1961 struct rpc_message msg = {
1962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1963 .rpc_argp = o_arg,
1964 .rpc_resp = o_res,
1965 .rpc_cred = data->owner->so_cred,
1966 };
c970aa85
TM		 1967 struct rpc_task_setup task_setup_data = {
1968 .rpc_client = server->client,
5138fde0 1969 .rpc_message = &msg,
c970aa85
TM		 1970 .callback_ops = &nfs4_open_ops,
1971 .callback_data = data,
101070ca 1972 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1973 .flags = RPC_TASK_ASYNC,
1974 };
24ac23ab
TM		 1975 int status;
1976
a9c92d6b 1977 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1978 kref_get(&data->kref);
3e309914
TM		 1979 data->rpc_done = 0;
1980 data->rpc_status = 0;
2ced46c2 1981 data->cancelled = 0;
bdeca1b7
TM		 1982 data->is_recover = 0;
1983 if (isrecover) {
8fe72bac 1984 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1985 data->is_recover = 1;
1986 }
c970aa85 1987 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1988 if (IS_ERR(task))
1989 return PTR_ERR(task);
1990 status = nfs4_wait_for_completion_rpc_task(task);
1991 if (status != 0) {
1992 data->cancelled = 1;
1993 smp_wmb();
1994 } else
1995 status = data->rpc_status;
1996 rpc_put_task(task);
1997
1998 return status;
1999}
2000
2001static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2002{
2b0143b5 2003 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2004 struct nfs_openres *o_res = &data->o_res;
2005 int status;
2006
2007 status = nfs4_run_open_task(data, 1);
2008 if (status != 0 || !data->rpc_done)
2009 return status;
2010
6926afd1
TM		 2011 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2012
b257957e
AB		 2013 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2014 status = _nfs4_proc_open_confirm(data);
2015 if (status != 0)
2016 return status;
2017 }
2018
2019 return status;
2020}
2021
f3792d63
TM		 2022/*
2023 * Additional permission checks in order to distinguish between an
2024 * open for read, and an open for execute. This works around the
2025 * fact that NFSv4 OPEN treats read and execute permissions as being
2026 * the same.
2027 * Note that in the non-execute case, we want to turn off permission
2028 * checking if we just created a new file (POSIX open() semantics).
2029 */
6168f62c
WAA		 2030static int nfs4_opendata_access(struct rpc_cred *cred,
2031 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2032 struct nfs4_state *state, fmode_t fmode,
2033 int openflags)
6168f62c
WAA		 2034{
2035 struct nfs_access_entry cache;
2036 u32 mask;
2037
2038 /* access call failed or for some reason the server doesn't
2039 * support any access modes -- defer access call until later */
2040 if (opendata->o_res.access_supported == 0)
2041 return 0;
2042
2043 mask = 0;
f3792d63
TM		 2044 /*
2045 * Use openflags to check for exec, because fmode won't
2046 * always have FMODE_EXEC set when file open for exec.
2047 */
f8d9a897
WAA		 2048 if (openflags & __FMODE_EXEC) {
2049 /* ONLY check for exec rights */
2050 mask = MAY_EXEC;
f3792d63 2051 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2052 mask = MAY_READ;
6168f62c
WAA		 2053
2054 cache.cred = cred;
2055 cache.jiffies = jiffies;
2056 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2057 nfs_access_add_cache(state->inode, &cache);
2058
bbd3a8ee 2059 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2060 return 0;
2061
2062 /* even though OPEN succeeded, access is denied. Close the file */
2063 nfs4_close_state(state, fmode);
998f40b5 2064 return -EACCES;
6168f62c
WAA		 2065}
2066
b257957e
AB		 2067/*
2068 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2069 */
2070static int _nfs4_proc_open(struct nfs4_opendata *data)
2071{
2b0143b5 2072 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2073 struct nfs_server *server = NFS_SERVER(dir);
2074 struct nfs_openargs *o_arg = &data->o_arg;
2075 struct nfs_openres *o_res = &data->o_res;
2076 int status;
2077
2078 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2079 if (!data->rpc_done)
2080 return status;
2081 if (status != 0) {
2082 if (status == -NFS4ERR_BADNAME &&
2083 !(o_arg->open_flags & O_CREAT))
2084 return -ENOENT;
24ac23ab 2085 return status;
08ef7bd3 2086 }
24ac23ab 2087
6926afd1
TM		 2088 nfs_fattr_map_and_free_names(server, &data->f_attr);
2089
5bc2afc2 2090 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2091 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2092 if (o_arg->open_flags & O_EXCL)
2093 data->file_created = 1;
2094 else if (o_res->cinfo.before != o_res->cinfo.after)
2095 data->file_created = 1;
2096 }
0df5dd4a
TM		 2097 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2098 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2099 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2100 status = _nfs4_proc_open_confirm(data);
1da177e4 2101 if (status != 0)
24ac23ab 2102 return status;
1da177e4
LT		 2103 }
2104 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2105 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2106 return 0;
1da177e4
LT		 2107}
2108
d83217c1
AA		 2109static int nfs4_recover_expired_lease(struct nfs_server *server)
2110{
2111 return nfs4_client_recover_expired_lease(server->nfs_client);
2112}
2113
1da177e4
LT		 2114/*
2115 * OPEN_EXPIRED:
2116 * reclaim state on the server after a network partition.
2117 * Assumes caller holds the appropriate lock
2118 */
539cd03a 2119static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2120{
e56e0b78 2121 struct nfs4_opendata *opendata;
864472e9 2122 int ret;
1da177e4 2123
4a1c0893 2124 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2125 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2126 if (IS_ERR(opendata))
2127 return PTR_ERR(opendata);
864472e9 2128 ret = nfs4_open_recover(opendata, state);
35d05778 2129 if (ret == -ESTALE)
3d4ff43d 2130 d_drop(ctx->dentry);
c6d00e63 2131 nfs4_opendata_put(opendata);
864472e9 2132 return ret;
1da177e4
LT		 2133}
2134
a9ed2e25 2135static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2136{
539cd03a 2137 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2138 struct nfs4_exception exception = { };
2139 int err;
2140
2141 do {
539cd03a 2142 err = _nfs4_open_expired(ctx, state);
42113a75 2143 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2144 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2145 continue;
a9ed2e25
TM		 2146 switch (err) {
2147 default:
2148 goto out;
2149 case -NFS4ERR_GRACE:
2150 case -NFS4ERR_DELAY:
2151 nfs4_handle_exception(server, err, &exception);
2152 err = 0;
2153 }
202b50dc 2154 } while (exception.retry);
a9ed2e25 2155out:
202b50dc
TM		 2156 return err;
2157}
2158
1da177e4
LT		 2159static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2160{
1da177e4 2161 struct nfs_open_context *ctx;
864472e9 2162 int ret;
1da177e4 2163
864472e9
TM		 2164 ctx = nfs4_state_find_open_context(state);
2165 if (IS_ERR(ctx))
91876b13 2166 return -EAGAIN;
539cd03a 2167 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2168 put_nfs_open_context(ctx);
2169 return ret;
1da177e4
LT		 2170}
2171
4dfd4f7a
TM		 2172static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2173{
2174 nfs_remove_bad_delegation(state->inode);
2175 write_seqlock(&state->seqlock);
2176 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2177 write_sequnlock(&state->seqlock);
2178 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2179}
2180
2181static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2182{
2183 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2184 nfs_finish_clear_delegation_stateid(state);
2185}
2186
2187static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2188{
2189 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2190 nfs40_clear_delegation_stateid(state);
2191 return nfs4_open_expired(sp, state);
2192}
2193
f062eb6c 2194#if defined(CONFIG_NFS_V4_1)
0c116cad 2195static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2196{
f062eb6c 2197 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2198 nfs4_stateid stateid;
ab7cb0df 2199 struct nfs_delegation *delegation;
0c116cad
TM		 2200 struct rpc_cred *cred;
2201 int status;
3e60ffdd 2202
ab7cb0df
TM		 2203 /* Get the delegation credential for use by test/free_stateid */
2204 rcu_read_lock();
2205 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2206 if (delegation == NULL) {
ab7cb0df 2207 rcu_read_unlock();
0c116cad
TM		 2208 return;
2209 }
2210
2211 nfs4_stateid_copy(&stateid, &delegation->stateid);
2212 cred = get_rpccred(delegation->cred);
2213 rcu_read_unlock();
2214 status = nfs41_test_stateid(server, &stateid, cred);
2215 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2216
3e60ffdd
CL		 2217 if (status != NFS_OK) {
2218 /* Free the stateid unless the server explicitly
2219 * informs us the stateid is unrecognized. */
2220 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2221 nfs41_free_stateid(server, &stateid, cred);
2222 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2223 }
ab7cb0df 2224
0c116cad 2225 put_rpccred(cred);
3e60ffdd
CL		 2226}
2227
2228/**
2229 * nfs41_check_open_stateid - possibly free an open stateid
2230 *
2231 * @state: NFSv4 state for an inode
2232 *
2233 * Returns NFS_OK if recovery for this stateid is now finished.
2234 * Otherwise a negative NFS4ERR value is returned.
2235 */
2236static int nfs41_check_open_stateid(struct nfs4_state *state)
2237{
2238 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2239 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2240 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2241 int status;
2242
2243 /* If a state reset has been done, test_stateid is unneeded */
2244 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2245 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2246 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2247 return -NFS4ERR_BAD_STATEID;
2248
ab7cb0df 2249 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2250 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2251 if (status != NFS_OK) {
2252 /* Free the stateid unless the server explicitly
2253 * informs us the stateid is unrecognized. */
2254 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2255 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2256
2257 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2258 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2259 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2260 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2261 }
2262 return status;
2263}
2264
2265static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2266{
eb64cf96 2267 int status;
b01dd1d8 2268
0c116cad 2269 nfs41_check_delegation_stateid(state);
3e60ffdd 2270 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2271 if (status != NFS_OK)
2272 status = nfs4_open_expired(sp, state);
2273 return status;
f062eb6c
BS		 2274}
2275#endif
2276
aa53ed54
JL		 2277/*
2278 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2279 * fields corresponding to attributes that were used to store the verifier.
2280 * Make sure we clobber those fields in the later setattr call
2281 */
2282static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2283{
2284 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2285 !(sattr->ia_valid & ATTR_ATIME_SET))
2286 sattr->ia_valid |= ATTR_ATIME;
2287
2288 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2289 !(sattr->ia_valid & ATTR_MTIME_SET))
2290 sattr->ia_valid |= ATTR_MTIME;
2291}
2292
c21443c2
TM		 2293static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2294 fmode_t fmode,
2295 int flags,
3efb9722 2296 struct nfs_open_context *ctx)
c21443c2
TM		 2297{
2298 struct nfs4_state_owner *sp = opendata->owner;
2299 struct nfs_server *server = sp->so_server;
275bb307 2300 struct dentry *dentry;
c21443c2
TM		 2301 struct nfs4_state *state;
2302 unsigned int seq;
2303 int ret;
2304
2305 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2306
2307 ret = _nfs4_proc_open(opendata);
dca78001 2308 if (ret != 0)
c21443c2
TM		 2309 goto out;
2310
2311 state = nfs4_opendata_to_nfs4_state(opendata);
2312 ret = PTR_ERR(state);
2313 if (IS_ERR(state))
2314 goto out;
2315 if (server->caps & NFS_CAP_POSIX_LOCK)
2316 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2317
275bb307 2318 dentry = opendata->dentry;
2b0143b5 2319 if (d_really_is_negative(dentry)) {
275bb307
TM		 2320 /* FIXME: Is this d_drop() ever needed? */
2321 d_drop(dentry);
2322 dentry = d_add_unique(dentry, igrab(state->inode));
2323 if (dentry == NULL) {
2324 dentry = opendata->dentry;
2325 } else if (dentry != ctx->dentry) {
2326 dput(ctx->dentry);
2327 ctx->dentry = dget(dentry);
2328 }
2329 nfs_set_verifier(dentry,
2b0143b5 2330 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2331 }
2332
c21443c2
TM		 2333 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2334 if (ret != 0)
2335 goto out;
2336
3efb9722 2337 ctx->state = state;
2b0143b5 2338 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2339 nfs_inode_attach_open_context(ctx);
2340 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2341 nfs4_schedule_stateid_recovery(server, state);
2342 }
c21443c2
TM		 2343out:
2344 return ret;
2345}
2346
1da177e4 2347/*
24ac23ab 2348 * Returns a referenced nfs4_state
1da177e4 2349 */
82be417a 2350static int _nfs4_do_open(struct inode *dir,
4197a055 2351 struct nfs_open_context *ctx,
82be417a
AA		 2352 int flags,
2353 struct iattr *sattr,
5bc2afc2
TM		 2354 struct nfs4_label *label,
2355 int *opened)
1da177e4
LT		 2356{
2357 struct nfs4_state_owner *sp;
2358 struct nfs4_state *state = NULL;
2359 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2360 struct nfs4_opendata *opendata;
4197a055
TM		 2361 struct dentry *dentry = ctx->dentry;
2362 struct rpc_cred *cred = ctx->cred;
2363 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2364 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2365 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2366 struct nfs4_label *olabel = NULL;
aac00a8d 2367 int status;
1da177e4
LT		 2368
2369 /* Protect against reboot recovery conflicts */
1da177e4 2370 status = -ENOMEM;
d1e284d5
TM		 2371 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2372 if (sp == NULL) {
1da177e4
LT		 2373 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2374 goto out_err;
2375 }
58d9714a
TM		 2376 status = nfs4_recover_expired_lease(server);
2377 if (status != 0)
b4454fe1 2378 goto err_put_state_owner;
2b0143b5
DH		 2379 if (d_really_is_positive(dentry))
2380 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2381 status = -ENOMEM;
2b0143b5 2382 if (d_really_is_positive(dentry))
49f9a0fa 2383 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2384 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2385 label, claim, GFP_KERNEL);
e56e0b78 2386 if (opendata == NULL)
95d35cb4 2387 goto err_put_state_owner;
1da177e4 2388
14c43f76
DQ		 2389 if (label) {
2390 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2391 if (IS_ERR(olabel)) {
2392 status = PTR_ERR(olabel);
2393 goto err_opendata_put;
2394 }
2395 }
2396
e911b815
TM		 2397 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2398 if (!opendata->f_attr.mdsthreshold) {
2399 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2400 if (!opendata->f_attr.mdsthreshold)
2401 goto err_free_label;
2402 }
1549210f 2403 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2404 }
2b0143b5
DH		 2405 if (d_really_is_positive(dentry))
2406 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2407
3efb9722 2408 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2409 if (status != 0)
14c43f76 2410 goto err_free_label;
3efb9722 2411 state = ctx->state;
6168f62c 2412
549b19cc
TM		 2413 if ((opendata->o_arg.open_flags & O_EXCL) &&
2414 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2415 nfs4_exclusive_attrset(opendata, sattr);
2416
2417 nfs_fattr_init(opendata->o_res.f_attr);
2418 status = nfs4_do_setattr(state->inode, cred,
2419 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2420 state, label, olabel);
2421 if (status == 0) {
f044636d
TM		 2422 nfs_setattr_update_inode(state->inode, sattr,
2423 opendata->o_res.f_attr);
aa9c2669 2424 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2425 }
0ab64e0e 2426 }
5bc2afc2
TM		 2427 if (opendata->file_created)
2428 *opened |= FILE_CREATED;
82be417a 2429
e911b815 2430 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2431 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2432 opendata->f_attr.mdsthreshold = NULL;
2433 }
82be417a 2434
14c43f76
DQ		 2435 nfs4_label_free(olabel);
2436
c6d00e63 2437 nfs4_opendata_put(opendata);
1da177e4 2438 nfs4_put_state_owner(sp);
1da177e4 2439 return 0;
14c43f76
DQ		 2440err_free_label:
2441 nfs4_label_free(olabel);
c6d00e63
TM		 2442err_opendata_put:
2443 nfs4_opendata_put(opendata);
e56e0b78
TM		 2444err_put_state_owner:
2445 nfs4_put_state_owner(sp);
1da177e4 2446out_err:
1da177e4
LT		 2447 return status;
2448}
2449
2450
82be417a 2451static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2452 struct nfs_open_context *ctx,
82be417a
AA		 2453 int flags,
2454 struct iattr *sattr,
5bc2afc2
TM		 2455 struct nfs4_label *label,
2456 int *opened)
1da177e4 2457{
49f9a0fa 2458 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2459 struct nfs4_exception exception = { };
2460 struct nfs4_state *res;
2461 int status;
2462
2463 do {
5bc2afc2 2464 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2465 res = ctx->state;
42113a75 2466 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2467 if (status == 0)
2468 break;
2469 /* NOTE: BAD_SEQID means the server and client disagree about the
2470 * book-keeping w.r.t. state-changing operations
2471 * (OPEN/CLOSE/LOCK/LOCKU...)
2472 * It is actually a sign of a bug on the client or on the server.
2473 *
2474 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2475 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2476 * have unhashed the old state_owner for us, and that we can
2477 * therefore safely retry using a new one. We should still warn
2478 * the user though...
2479 */
2480 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2481 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2482 " returned a bad sequence-id error!\n",
2483 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2484 exception.retry = 1;
2485 continue;
2486 }
550f5747
TM		 2487 /*
2488 * BAD_STATEID on OPEN means that the server cancelled our
2489 * state before it received the OPEN_CONFIRM.
2490 * Recover by retrying the request as per the discussion
2491 * on Page 181 of RFC3530.
2492 */
2493 if (status == -NFS4ERR_BAD_STATEID) {
2494 exception.retry = 1;
2495 continue;
2496 }
aac00a8d
TM		 2497 if (status == -EAGAIN) {
2498 /* We must have found a delegation */
2499 exception.retry = 1;
2500 continue;
2501 }
49f9a0fa
TM		 2502 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2503 continue;
2504 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2505 status, &exception));
2506 } while (exception.retry);
2507 return res;
2508}
2509
659bfcd6
TM		 2510static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2511 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2512 struct nfs4_state *state, struct nfs4_label *ilabel,
2513 struct nfs4_label *olabel)
1da177e4 2514{
3e4f6290 2515 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2516 struct nfs_setattrargs arg = {
3e4f6290 2517 .fh = NFS_FH(inode),
1da177e4
LT		 2518 .iap = sattr,
2519 .server = server,
2520 .bitmask = server->attr_bitmask,
1775fd3e 2521 .label = ilabel,
1da177e4
LT		 2522 };
2523 struct nfs_setattrres res = {
2524 .fattr = fattr,
1775fd3e 2525 .label = olabel,
1da177e4
LT		 2526 .server = server,
2527 };
2528 struct rpc_message msg = {
659bfcd6
TM		 2529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2530 .rpc_argp = &arg,
2531 .rpc_resp = &res,
2532 .rpc_cred = cred,
1da177e4 2533 };
26e976a8 2534 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2535 fmode_t fmode;
2536 bool truncate;
65e4308d 2537 int status;
1da177e4 2538
aa9c2669
DQ		 2539 arg.bitmask = nfs4_bitmask(server, ilabel);
2540 if (ilabel)
2541 arg.bitmask = nfs4_bitmask(server, olabel);
2542
0e574af1 2543 nfs_fattr_init(fattr);
1da177e4 2544
ee3ae84e
TM		 2545 /* Servers should only apply open mode checks for file size changes */
2546 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2547 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2548
2549 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2550 /* Use that stateid */
0418dae1 2551 } else if (truncate && state != NULL) {
2a369153
TM		 2552 struct nfs_lockowner lockowner = {
2553 .l_owner = current->files,
2554 .l_pid = current->tgid,
2555 };
0418dae1
TM		 2556 if (!nfs4_valid_open_stateid(state))
2557 return -EBADF;
2558 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2559 &lockowner) == -EIO)
2560 return -EBADF;
08e9eac4 2561 } else
f597c537 2562 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2563
7c513058 2564 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2565 if (status == 0 && state != NULL)
2566 renew_lease(server, timestamp);
65e4308d 2567 return status;
1da177e4
LT		 2568}
2569
659bfcd6
TM		 2570static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2571 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2572 struct nfs4_state *state, struct nfs4_label *ilabel,
2573 struct nfs4_label *olabel)
1da177e4 2574{
3e4f6290 2575 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2576 struct nfs4_exception exception = {
2577 .state = state,
3114ea7a 2578 .inode = inode,
a1d0b5ee 2579 };
1da177e4
LT		 2580 int err;
2581 do {
1775fd3e 2582 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2583 trace_nfs4_setattr(inode, err);
451146be
TM		 2584 switch (err) {
2585 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2586 if (!(sattr->ia_valid & ATTR_SIZE)) {
2587 pr_warn_once("NFSv4: server %s is incorrectly "
2588 "applying open mode checks to "
2589 "a SETATTR that is not "
2590 "changing file size.\n",
2591 server->nfs_client->cl_hostname);
2592 }
451146be
TM		 2593 if (state && !(state->state & FMODE_WRITE)) {
2594 err = -EBADF;
2595 if (sattr->ia_valid & ATTR_OPEN)
2596 err = -EACCES;
2597 goto out;
2598 }
2599 }
2600 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2601 } while (exception.retry);
451146be 2602out:
1da177e4
LT		 2603 return err;
2604}
2605
2606struct nfs4_closedata {
2607 struct inode *inode;
2608 struct nfs4_state *state;
2609 struct nfs_closeargs arg;
2610 struct nfs_closeres res;
516a6af6 2611 struct nfs_fattr fattr;
26e976a8 2612 unsigned long timestamp;
f7e8917a
FI		 2613 bool roc;
2614 u32 roc_barrier;
1da177e4
LT		 2615};
2616
963d8fe5 2617static void nfs4_free_closedata(void *data)
9512135d 2618{
963d8fe5
TM		 2619 struct nfs4_closedata *calldata = data;
2620 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2621 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2622
f7e8917a
FI		 2623 if (calldata->roc)
2624 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2625 nfs4_put_open_state(calldata->state);
2626 nfs_free_seqid(calldata->arg.seqid);
9512135d 2627 nfs4_put_state_owner(sp);
322b2b90 2628 nfs_sb_deactive(sb);
9512135d
TM		 2629 kfree(calldata);
2630}
2631
963d8fe5 2632static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2633{
963d8fe5 2634 struct nfs4_closedata *calldata = data;
1da177e4 2635 struct nfs4_state *state = calldata->state;
1da177e4 2636 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2637 nfs4_stateid *res_stateid = NULL;
1da177e4 2638
a3ca5651 2639 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2640 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2641 return;
42113a75 2642 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2643 /* hmm. we are done with the inode, and in the process of freeing
2644 * the state_owner. we keep this around to process errors
2645 */
1da177e4
LT		 2646 switch (task->tk_status) {
2647 case 0:
412f6c4c
TM		 2648 res_stateid = &calldata->res.stateid;
2649 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2650 pnfs_roc_set_barrier(state->inode,
2651 calldata->roc_barrier);
26e976a8 2652 renew_lease(server, calldata->timestamp);
412f6c4c 2653 break;
69794ad7 2654 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2655 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2656 case -NFS4ERR_OLD_STATEID:
2657 case -NFS4ERR_BAD_STATEID:
1da177e4 2658 case -NFS4ERR_EXPIRED:
566fcec6 2659 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2660 &state->open_stateid)) {
566fcec6
TM		 2661 rpc_restart_call_prepare(task);
2662 goto out_release;
2663 }
dc0b027d 2664 if (calldata->arg.fmode == 0)
9e33bed5 2665 break;
1da177e4 2666 default:
8478eaa1 2667 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2668 rpc_restart_call_prepare(task);
69794ad7
TM		 2669 goto out_release;
2670 }
1da177e4 2671 }
412f6c4c 2672 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2673out_release:
72211dbe 2674 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2675 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2676 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2677}
2678
4ce70ada 2679static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2680{
4ce70ada 2681 struct nfs4_closedata *calldata = data;
9512135d 2682 struct nfs4_state *state = calldata->state;
7fdab069 2683 struct inode *inode = calldata->inode;
aee7af35 2684 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2685 int call_close = 0;
9512135d 2686
a3ca5651 2687 dprintk("%s: begin!\n", __func__);
963d8fe5 2688 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2689 goto out_wait;
003707c7 2690
88069f77 2691 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2692 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2693 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2694 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2695 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2696 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2697 /* Calculate the change in open mode */
cd9288ff 2698 calldata->arg.fmode = 0;
e7616923 2699 if (state->n_rdwr == 0) {
cd9288ff
TM		 2700 if (state->n_rdonly == 0)
2701 call_close |= is_rdonly;
2702 else if (is_rdonly)
2703 calldata->arg.fmode |= FMODE_READ;
2704 if (state->n_wronly == 0)
2705 call_close |= is_wronly;
2706 else if (is_wronly)
2707 calldata->arg.fmode |= FMODE_WRITE;
2708 } else if (is_rdwr)
2709 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2710
2711 if (calldata->arg.fmode == 0)
2712 call_close |= is_rdwr;
2713
5d422301
TM		 2714 if (!nfs4_valid_open_stateid(state))
2715 call_close = 0;
4cecb76f 2716 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2717
2718 if (!call_close) {
963d8fe5 2719 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2720 goto out_no_action;
9512135d 2721 }
88069f77 2722
f7e8917a 2723 if (calldata->arg.fmode == 0) {
88069f77 2724 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2725 if (calldata->roc &&
b9536ad5
AA		 2726 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2727 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2728 goto out_wait;
b9536ad5 2729 }
f7e8917a 2730 }
6ae37339
TM		 2731 calldata->arg.share_access =
2732 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2733 calldata->arg.fmode, 0);
88069f77 2734
516a6af6 2735 nfs_fattr_init(calldata->res.fattr);
26e976a8 2736 calldata->timestamp = jiffies;
7fdab069 2737 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2738 &calldata->arg.seq_args,
2739 &calldata->res.seq_res,
2240a9e2
TM		 2740 task) != 0)
2741 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2742 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2743 return;
2744out_no_action:
2745 task->tk_action = NULL;
2746out_wait:
2747 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2748}
2749
963d8fe5 2750static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2751 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2752 .rpc_call_done = nfs4_close_done,
2753 .rpc_release = nfs4_free_closedata,
2754};
2755
fe08c546
PT		 2756static bool nfs4_roc(struct inode *inode)
2757{
40dd4b7a 2758 if (!nfs_have_layout(inode))
fe08c546 2759 return false;
fe08c546
PT		 2760 return pnfs_roc(inode);
2761}
2762
1da177e4
LT		 2763/*
2764 * It is possible for data to be read/written from a mem-mapped file
2765 * after the sys_close call (which hits the vfs layer as a flush).
2766 * This means that we can't safely call nfsv4 close on a file until
2767 * the inode is cleared. This in turn means that we are not good
2768 * NFSv4 citizens - we do not indicate to the server to update the file's
2769 * share state even when we are done with one of the three share
2770 * stateid's in the inode.
2771 *
2772 * NOTE: Caller must be holding the sp->so_owner semaphore!
2773 */
1f7977c1 2774int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2775{
4a35bd41 2776 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2777 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2778 struct nfs4_closedata *calldata;
b39e625b
TM		 2779 struct nfs4_state_owner *sp = state->owner;
2780 struct rpc_task *task;
5138fde0
TM		 2781 struct rpc_message msg = {
2782 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2783 .rpc_cred = state->owner->so_cred,
2784 };
c970aa85
TM		 2785 struct rpc_task_setup task_setup_data = {
2786 .rpc_client = server->client,
5138fde0 2787 .rpc_message = &msg,
c970aa85 2788 .callback_ops = &nfs4_close_ops,
101070ca 2789 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2790 .flags = RPC_TASK_ASYNC,
2791 };
9512135d 2792 int status = -ENOMEM;
1da177e4 2793
fa940720
WAA		 2794 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2795 &task_setup_data.rpc_client, &msg);
2796
8535b2be 2797 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2798 if (calldata == NULL)
9512135d 2799 goto out;
a9c92d6b 2800 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2801 calldata->inode = state->inode;
1da177e4 2802 calldata->state = state;
4a35bd41 2803 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2804 /* Serialization for the sequence id */
63f5f796
TM		 2805 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2806 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2807 if (IS_ERR(calldata->arg.seqid))
9512135d 2808 goto out_free_calldata;
dc0b027d 2809 calldata->arg.fmode = 0;
a65318bf 2810 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2811 calldata->res.fattr = &calldata->fattr;
c1d51931 2812 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2813 calldata->res.server = server;
fe08c546 2814 calldata->roc = nfs4_roc(state->inode);
643168c2 2815 nfs_sb_active(calldata->inode->i_sb);
9512135d 2816
1174dd1f
TM		 2817 msg.rpc_argp = &calldata->arg;
2818 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2819 task_setup_data.callback_data = calldata;
2820 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2821 if (IS_ERR(task))
2822 return PTR_ERR(task);
a49c3c77
TM		 2823 status = 0;
2824 if (wait)
2825 status = rpc_wait_for_completion_task(task);
b39e625b 2826 rpc_put_task(task);
a49c3c77 2827 return status;
9512135d
TM		 2828out_free_calldata:
2829 kfree(calldata);
2830out:
b39e625b
TM		 2831 nfs4_put_open_state(state);
2832 nfs4_put_state_owner(sp);
9512135d 2833 return status;
1da177e4
LT		 2834}
2835
2b484297 2836static struct inode *
5bc2afc2
TM		 2837nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2838 int open_flags, struct iattr *attr, int *opened)
1da177e4 2839{
1da177e4 2840 struct nfs4_state *state;
aa9c2669
DQ		 2841 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2842
2843 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2844
565277f6 2845 /* Protect against concurrent sillydeletes */
5bc2afc2 2846 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2847
2848 nfs4_label_release_security(label);
2849
f46e0bd3
TM		 2850 if (IS_ERR(state))
2851 return ERR_CAST(state);
275bb307 2852 return state->inode;
1da177e4
LT		 2853}
2854
1185a552 2855static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2856{
2857 if (ctx->state == NULL)
2858 return;
2859 if (is_sync)
643168c2 2860 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2861 else
643168c2 2862 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2863}
1da177e4 2864
b944dba3
TM		 2865#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2866#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2867#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2868
1da177e4
LT		 2869static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2870{
43652ad5
BH		 2871 struct nfs4_server_caps_arg args = {
2872 .fhandle = fhandle,
2873 };
1da177e4
LT		 2874 struct nfs4_server_caps_res res = {};
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2877 .rpc_argp = &args,
1da177e4
LT		 2878 .rpc_resp = &res,
2879 };
2880 int status;
2881
7c513058 2882 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2883 if (status == 0) {
b944dba3
TM		 2884 /* Sanity check the server answers */
2885 switch (server->nfs_client->cl_minorversion) {
2886 case 0:
2887 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2888 res.attr_bitmask[2] = 0;
2889 break;
2890 case 1:
2891 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2892 break;
2893 case 2:
2894 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2895 }
1da177e4 2896 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2897 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2898 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2899 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2900 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2901 NFS_CAP_CTIME|NFS_CAP_MTIME|
2902 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2903 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2904 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2905 server->caps |= NFS_CAP_ACLS;
2906 if (res.has_links != 0)
2907 server->caps |= NFS_CAP_HARDLINKS;
2908 if (res.has_symlinks != 0)
2909 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2910 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2911 server->caps |= NFS_CAP_FILEID;
2912 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2913 server->caps |= NFS_CAP_MODE;
2914 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2915 server->caps |= NFS_CAP_NLINK;
2916 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2917 server->caps |= NFS_CAP_OWNER;
2918 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2919 server->caps |= NFS_CAP_OWNER_GROUP;
2920 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2921 server->caps |= NFS_CAP_ATIME;
2922 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2923 server->caps |= NFS_CAP_CTIME;
2924 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2925 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2926#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2927 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2928 server->caps |= NFS_CAP_SECURITY_LABEL;
2929#endif
2930 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2931 sizeof(server->attr_bitmask));
b944dba3 2932 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2933
a65318bf
TM		 2934 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2935 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2936 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2937 server->cache_consistency_bitmask[2] = 0;
1da177e4 2938 server->acl_bitmask = res.acl_bitmask;
264e6351 2939 server->fh_expire_type = res.fh_expire_type;
1da177e4 2940 }
cccef3b9 2941
1da177e4
LT		 2942 return status;
2943}
2944
55a97593 2945int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2946{
2947 struct nfs4_exception exception = { };
2948 int err;
2949 do {
2950 err = nfs4_handle_exception(server,
2951 _nfs4_server_capabilities(server, fhandle),
2952 &exception);
2953 } while (exception.retry);
2954 return err;
2955}
2956
2957static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2958 struct nfs_fsinfo *info)
2959{
aa9c2669 2960 u32 bitmask[3];
1da177e4 2961 struct nfs4_lookup_root_arg args = {
aa9c2669 2962 .bitmask = bitmask,
1da177e4
LT		 2963 };
2964 struct nfs4_lookup_res res = {
2965 .server = server,
0e574af1 2966 .fattr = info->fattr,
1da177e4
LT		 2967 .fh = fhandle,
2968 };
2969 struct rpc_message msg = {
2970 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2971 .rpc_argp = &args,
2972 .rpc_resp = &res,
2973 };
008f55d0 2974
aa9c2669
DQ		 2975 bitmask[0] = nfs4_fattr_bitmap[0];
2976 bitmask[1] = nfs4_fattr_bitmap[1];
2977 /*
2978 * Process the label in the upcoming getfattr
2979 */
2980 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2981
0e574af1 2982 nfs_fattr_init(info->fattr);
7c513058 2983 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2984}
2985
2986static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2987 struct nfs_fsinfo *info)
2988{
2989 struct nfs4_exception exception = { };
2990 int err;
2991 do {
fb8a5ba8 2992 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2993 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2994 switch (err) {
2995 case 0:
2996 case -NFS4ERR_WRONGSEC:
05e9cfb4 2997 goto out;
fb8a5ba8
BS		 2998 default:
2999 err = nfs4_handle_exception(server, err, &exception);
3000 }
1da177e4 3001 } while (exception.retry);
05e9cfb4 3002out:
1da177e4
LT		 3003 return err;
3004}
3005
8f70e95f
BS		 3006static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3007 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3008{
c2190661
TM		 3009 struct rpc_auth_create_args auth_args = {
3010 .pseudoflavor = flavor,
3011 };
8f70e95f
BS		 3012 struct rpc_auth *auth;
3013 int ret;
3014
c2190661 3015 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3016 if (IS_ERR(auth)) {
75bc8821 3017 ret = -EACCES;
8f70e95f
BS		 3018 goto out;
3019 }
3020 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3021out:
3022 return ret;
3023}
3024
9a744ba3
CL		 3025/*
3026 * Retry pseudoroot lookup with various security flavors. We do this when:
3027 *
3028 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3029 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3030 *
3031 * Returns zero on success, or a negative NFS4ERR value, or a
3032 * negative errno value.
3033 */
801a16dc 3034static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3035 struct nfs_fsinfo *info)
1da177e4 3036{
9a744ba3
CL		 3037 /* Per 3530bis 15.33.5 */
3038 static const rpc_authflavor_t flav_array[] = {
3039 RPC_AUTH_GSS_KRB5P,
3040 RPC_AUTH_GSS_KRB5I,
3041 RPC_AUTH_GSS_KRB5,
c4eafe11 3042 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3043 RPC_AUTH_NULL,
3044 };
3045 int status = -EPERM;
3046 size_t i;
6a1a1e34 3047
4d4b69dd
WAA		 3048 if (server->auth_info.flavor_len > 0) {
3049 /* try each flavor specified by user */
3050 for (i = 0; i < server->auth_info.flavor_len; i++) {
3051 status = nfs4_lookup_root_sec(server, fhandle, info,
3052 server->auth_info.flavors[i]);
3053 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3054 continue;
3055 break;
3056 }
3057 } else {
3058 /* no flavors specified by user, try default list */
3059 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3060 status = nfs4_lookup_root_sec(server, fhandle, info,
3061 flav_array[i]);
3062 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3063 continue;
3064 break;
3065 }
8f70e95f 3066 }
9a744ba3 3067
fb8a5ba8
BS		 3068 /*
3069 * -EACCESS could mean that the user doesn't have correct permissions
3070 * to access the mount. It could also mean that we tried to mount
3071 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3072 * existing mount programs don't handle -EACCES very well so it should
3073 * be mapped to -EPERM instead.
3074 */
3075 if (status == -EACCES)
3076 status = -EPERM;
801a16dc
BS		 3077 return status;
3078}
3079
2ed4b95b
CL		 3080static int nfs4_do_find_root_sec(struct nfs_server *server,
3081 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3082{
3083 int mv = server->nfs_client->cl_minorversion;
3084 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3085}
3086
3087/**
3088 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3089 * @server: initialized nfs_server handle
3090 * @fhandle: we fill in the pseudo-fs root file handle
3091 * @info: we fill in an FSINFO struct
5e6b1990 3092 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3093 *
3094 * Returns zero on success, or a negative errno.
801a16dc 3095 */
3028eb2b 3096int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3097 struct nfs_fsinfo *info,
3098 bool auth_probe)
801a16dc 3099{
c7757074 3100 int status = 0;
2ed4b95b 3101
c7757074 3102 if (!auth_probe)
5e6b1990 3103 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3104
3105 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3106 status = nfs4_do_find_root_sec(server, fhandle, info);
3107
1da177e4
LT		 3108 if (status == 0)
3109 status = nfs4_server_capabilities(server, fhandle);
3110 if (status == 0)
3111 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3112
c12e87f4 3113 return nfs4_map_errors(status);
1da177e4
LT		 3114}
3115
bae36241
BS		 3116static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3117 struct nfs_fsinfo *info)
3118{
3119 int error;
3120 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3121 struct nfs4_label *label = NULL;
bae36241
BS		 3122
3123 error = nfs4_server_capabilities(server, mntfh);
3124 if (error < 0) {
3125 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3126 return error;
3127 }
3128
14c43f76
DQ		 3129 label = nfs4_label_alloc(server, GFP_KERNEL);
3130 if (IS_ERR(label))
3131 return PTR_ERR(label);
3132
1775fd3e 3133 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3134 if (error < 0) {
3135 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3136 goto err_free_label;
bae36241
BS		 3137 }
3138
3139 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3140 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3141 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3142
14c43f76
DQ		 3143err_free_label:
3144 nfs4_label_free(label);
3145
bae36241
BS		 3146 return error;
3147}
3148
6b97fd3d
MN		 3149/*
3150 * Get locations and (maybe) other attributes of a referral.
3151 * Note that we'll actually follow the referral later when
3152 * we detect fsid mismatch in inode revalidation
3153 */
f05d147f
BS		 3154static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3155 const struct qstr *name, struct nfs_fattr *fattr,
3156 struct nfs_fh *fhandle)
6b97fd3d
MN		 3157{
3158 int status = -ENOMEM;
3159 struct page *page = NULL;
3160 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3161
3162 page = alloc_page(GFP_KERNEL);
3163 if (page == NULL)
3164 goto out;
3165 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3166 if (locations == NULL)
3167 goto out;
3168
f05d147f 3169 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3170 if (status != 0)
3171 goto out;
519ae255
CL		 3172
3173 /*
3174 * If the fsid didn't change, this is a migration event, not a
3175 * referral. Cause us to drop into the exception handler, which
3176 * will kick off migration recovery.
3177 */
6b97fd3d 3178 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3179 dprintk("%s: server did not return a different fsid for"
3180 " a referral at %s\n", __func__, name->name);
519ae255 3181 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3182 goto out;
3183 }
533eb461
AA		 3184 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3185 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3186
533eb461 3187 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3188 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3189 memset(fhandle, 0, sizeof(struct nfs_fh));
3190out:
3191 if (page)
3192 __free_page(page);
5d7ca35a 3193 kfree(locations);
6b97fd3d
MN		 3194 return status;
3195}
3196
1775fd3e
DQ		 3197static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3198 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3199{
3200 struct nfs4_getattr_arg args = {
3201 .fh = fhandle,
3202 .bitmask = server->attr_bitmask,
3203 };
3204 struct nfs4_getattr_res res = {
3205 .fattr = fattr,
1775fd3e 3206 .label = label,
1da177e4
LT		 3207 .server = server,
3208 };
3209 struct rpc_message msg = {
3210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3211 .rpc_argp = &args,
3212 .rpc_resp = &res,
3213 };
aa9c2669
DQ		 3214
3215 args.bitmask = nfs4_bitmask(server, label);
3216
0e574af1 3217 nfs_fattr_init(fattr);
7c513058 3218 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3219}
3220
1775fd3e
DQ		 3221static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3222 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3223{
3224 struct nfs4_exception exception = { };
3225 int err;
3226 do {
b5f875a9
TM		 3227 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3228 trace_nfs4_getattr(server, fhandle, fattr, err);
3229 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3230 &exception);
3231 } while (exception.retry);
3232 return err;
3233}
3234
3235/*
3236 * The file is not closed if it is opened due to the a request to change
3237 * the size of the file. The open call will not be needed once the
3238 * VFS layer lookup-intents are implemented.
3239 *
3240 * Close is called when the inode is destroyed.
3241 * If we haven't opened the file for O_WRONLY, we
3242 * need to in the size_change case to obtain a stateid.
3243 *
3244 * Got race?
3245 * Because OPEN is always done by name in nfsv4, it is
3246 * possible that we opened a different file by the same
3247 * name. We can recognize this race condition, but we
3248 * can't do anything about it besides returning an error.
3249 *
3250 * This will be fixed with VFS changes (lookup-intent).
3251 */
3252static int
3253nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3254 struct iattr *sattr)
3255{
2b0143b5 3256 struct inode *inode = d_inode(dentry);
659bfcd6 3257 struct rpc_cred *cred = NULL;
d530838b 3258 struct nfs4_state *state = NULL;
14c43f76 3259 struct nfs4_label *label = NULL;
1da177e4
LT		 3260 int status;
3261
88ac815c
PT		 3262 if (pnfs_ld_layoutret_on_setattr(inode) &&
3263 sattr->ia_valid & ATTR_SIZE &&
3264 sattr->ia_size < i_size_read(inode))
24028672 3265 pnfs_commit_and_return_layout(inode);
8a1636c4 3266
0e574af1 3267 nfs_fattr_init(fattr);
1da177e4 3268
2669940d
AA		 3269 /* Deal with open(O_TRUNC) */
3270 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3271 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3272
3273 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3274 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3275 return 0;
3276
d530838b 3277 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3278 if (sattr->ia_valid & ATTR_FILE) {
3279 struct nfs_open_context *ctx;
3280
3281 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3282 if (ctx) {
3283 cred = ctx->cred;
3284 state = ctx->state;
3285 }
659bfcd6 3286 }
08e9eac4 3287
14c43f76
DQ		 3288 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3289 if (IS_ERR(label))
3290 return PTR_ERR(label);
3291
3292 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3293 if (status == 0) {
f044636d 3294 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3295 nfs_setsecurity(inode, fattr, label);
3296 }
14c43f76 3297 nfs4_label_free(label);
1da177e4
LT		 3298 return status;
3299}
3300
0c2e53f1
TM		 3301static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3302 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3303 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3304{
0c2e53f1 3305 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3306 int status;
3307 struct nfs4_lookup_arg args = {
3308 .bitmask = server->attr_bitmask,
0c2e53f1 3309 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3310 .name = name,
3311 };
3312 struct nfs4_lookup_res res = {
3313 .server = server,
3314 .fattr = fattr,
aa9c2669 3315 .label = label,
2b3de441
DH		 3316 .fh = fhandle,
3317 };
3318 struct rpc_message msg = {
3319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3320 .rpc_argp = &args,
3321 .rpc_resp = &res,
3322 };
3323
aa9c2669
DQ		 3324 args.bitmask = nfs4_bitmask(server, label);
3325
2b3de441
DH		 3326 nfs_fattr_init(fattr);
3327
1da177e4 3328 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3329 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3330 dprintk("NFS reply lookup: %d\n", status);
3331 return status;
3332}
3333
72de53ec 3334static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3335{
7ebb9315 3336 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3337 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3338 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3339 fattr->nlink = 2;
3340}
3341
72de53ec
BS		 3342static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3343 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3344 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3345{
3346 struct nfs4_exception exception = { };
72de53ec 3347 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3348 int err;
3349 do {
1775fd3e 3350 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3351 trace_nfs4_lookup(dir, name, err);
72de53ec 3352 switch (err) {
08ef7bd3 3353 case -NFS4ERR_BADNAME:
72de53ec
BS		 3354 err = -ENOENT;
3355 goto out;
0c2e53f1 3356 case -NFS4ERR_MOVED:
f05d147f 3357 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3358 if (err == -NFS4ERR_MOVED)
3359 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3360 goto out;
0c2e53f1 3361 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3362 err = -EPERM;
3363 if (client != *clnt)
3364 goto out;
66b06860 3365 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3366 if (IS_ERR(client))
3367 return PTR_ERR(client);
3368
3369 exception.retry = 1;
3370 break;
3371 default:
3372 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3373 }
1da177e4 3374 } while (exception.retry);
72de53ec
BS		 3375
3376out:
3377 if (err == 0)
3378 *clnt = client;
3379 else if (client != *clnt)
3380 rpc_shutdown_client(client);
3381
1da177e4
LT		 3382 return err;
3383}
3384
80a16b21 3385static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3386 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3387 struct nfs4_label *label)
72de53ec
BS		 3388{
3389 int status;
3390 struct rpc_clnt *client = NFS_CLIENT(dir);
3391
1775fd3e 3392 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3393 if (client != NFS_CLIENT(dir)) {
3394 rpc_shutdown_client(client);
3395 nfs_fixup_secinfo_attributes(fattr);
3396 }
3397 return status;
3398}
3399
f05d147f
BS		 3400struct rpc_clnt *
3401nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3402 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3403{
b72888cb 3404 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3405 int status;
f05d147f 3406
1775fd3e 3407 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3408 if (status < 0)
f05d147f 3409 return ERR_PTR(status);
b72888cb 3410 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3411}
3412
1da177e4
LT		 3413static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3414{
76b32999 3415 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3416 struct nfs4_accessargs args = {
3417 .fh = NFS_FH(inode),
a4980e78 3418 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3419 };
3420 struct nfs4_accessres res = {
3421 .server = server,
1da177e4 3422 };
1da177e4
LT		 3423 struct rpc_message msg = {
3424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3425 .rpc_argp = &args,
3426 .rpc_resp = &res,
3427 .rpc_cred = entry->cred,
3428 };
3429 int mode = entry->mask;
aa9c2669 3430 int status = 0;
1da177e4
LT		 3431
3432 /*
3433 * Determine which access bits we want to ask for...
3434 */
3435 if (mode & MAY_READ)
3436 args.access |= NFS4_ACCESS_READ;
3437 if (S_ISDIR(inode->i_mode)) {
3438 if (mode & MAY_WRITE)
3439 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3440 if (mode & MAY_EXEC)
3441 args.access |= NFS4_ACCESS_LOOKUP;
3442 } else {
3443 if (mode & MAY_WRITE)
3444 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3445 if (mode & MAY_EXEC)
3446 args.access |= NFS4_ACCESS_EXECUTE;
3447 }
c407d41a
TM		 3448
3449 res.fattr = nfs_alloc_fattr();
3450 if (res.fattr == NULL)
3451 return -ENOMEM;
3452
7c513058 3453 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3454 if (!status) {
6168f62c 3455 nfs_access_set_mask(entry, res.access);
c407d41a 3456 nfs_refresh_inode(inode, res.fattr);
1da177e4 3457 }
c407d41a 3458 nfs_free_fattr(res.fattr);
1da177e4
LT		 3459 return status;
3460}
3461
3462static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3463{
3464 struct nfs4_exception exception = { };
3465 int err;
3466 do {
c1578b76
TM		 3467 err = _nfs4_proc_access(inode, entry);
3468 trace_nfs4_access(inode, err);
3469 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3470 &exception);
3471 } while (exception.retry);
3472 return err;
3473}
3474
3475/*
3476 * TODO: For the time being, we don't try to get any attributes
3477 * along with any of the zero-copy operations READ, READDIR,
3478 * READLINK, WRITE.
3479 *
3480 * In the case of the first three, we want to put the GETATTR
3481 * after the read-type operation -- this is because it is hard
3482 * to predict the length of a GETATTR response in v4, and thus
3483 * align the READ data correctly. This means that the GETATTR
3484 * may end up partially falling into the page cache, and we should
3485 * shift it into the 'tail' of the xdr_buf before processing.
3486 * To do this efficiently, we need to know the total length
3487 * of data received, which doesn't seem to be available outside
3488 * of the RPC layer.
3489 *
3490 * In the case of WRITE, we also want to put the GETATTR after
3491 * the operation -- in this case because we want to make sure
140150db 3492 * we get the post-operation mtime and size.
1da177e4
LT		 3493 *
3494 * Both of these changes to the XDR layer would in fact be quite
3495 * minor, but I decided to leave them for a subsequent patch.
3496 */
3497static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3498 unsigned int pgbase, unsigned int pglen)
3499{
3500 struct nfs4_readlink args = {
3501 .fh = NFS_FH(inode),
3502 .pgbase = pgbase,
3503 .pglen = pglen,
3504 .pages = &page,
3505 };
f50c7000 3506 struct nfs4_readlink_res res;
1da177e4
LT		 3507 struct rpc_message msg = {
3508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3509 .rpc_argp = &args,
f50c7000 3510 .rpc_resp = &res,
1da177e4
LT		 3511 };
3512
7c513058 3513 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3514}
3515
3516static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3517 unsigned int pgbase, unsigned int pglen)
3518{
3519 struct nfs4_exception exception = { };
3520 int err;
3521 do {
c1578b76
TM		 3522 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3523 trace_nfs4_readlink(inode, err);
3524 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3525 &exception);
3526 } while (exception.retry);
3527 return err;
3528}
3529
1da177e4 3530/*
8867fe58 3531 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3532 */
1da177e4
LT		 3533static int
3534nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3535 int flags)
1da177e4 3536{
aa9c2669 3537 struct nfs4_label l, *ilabel = NULL;
8867fe58 3538 struct nfs_open_context *ctx;
1da177e4 3539 struct nfs4_state *state;
5bc2afc2 3540 int opened = 0;
1da177e4
LT		 3541 int status = 0;
3542
8867fe58
MS		 3543 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3544 if (IS_ERR(ctx))
3545 return PTR_ERR(ctx);
3546
aa9c2669
DQ		 3547 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3548
a8a5da99 3549 sattr->ia_mode &= ~current_umask();
5bc2afc2 3550 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3551 if (IS_ERR(state)) {
3552 status = PTR_ERR(state);
c0204fd2 3553 goto out;
1da177e4 3554 }
1da177e4 3555out:
aa9c2669 3556 nfs4_label_release_security(ilabel);
8867fe58 3557 put_nfs_open_context(ctx);
1da177e4
LT		 3558 return status;
3559}
3560
3561static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3562{
16e42959 3563 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3564 struct nfs_removeargs args = {
1da177e4 3565 .fh = NFS_FH(dir),
26fe5750 3566 .name = *name,
16e42959 3567 };
4fdc17b2 3568 struct nfs_removeres res = {
16e42959 3569 .server = server,
1da177e4 3570 };
1da177e4 3571 struct rpc_message msg = {
4fdc17b2
TM		 3572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3573 .rpc_argp = &args,
3574 .rpc_resp = &res,
1da177e4 3575 };
778d2817 3576 int status;
1da177e4 3577
7c513058 3578 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3579 if (status == 0)
16e42959 3580 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3581 return status;
3582}
3583
3584static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3585{
3586 struct nfs4_exception exception = { };
3587 int err;
3588 do {
078ea3df
TM		 3589 err = _nfs4_proc_remove(dir, name);
3590 trace_nfs4_remove(dir, name, err);
3591 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3592 &exception);
3593 } while (exception.retry);
3594 return err;
3595}
3596
e4eff1a6 3597static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3598{
e4eff1a6
TM		 3599 struct nfs_server *server = NFS_SERVER(dir);
3600 struct nfs_removeargs *args = msg->rpc_argp;
3601 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3602
e4eff1a6 3603 res->server = server;
1da177e4 3604 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3605 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3606
3607 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3608}
3609
34e137cc
BS		 3610static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3611{
d9afbd1b
TM		 3612 nfs4_setup_sequence(NFS_SERVER(data->dir),
3613 &data->args.seq_args,
3614 &data->res.seq_res,
3615 task);
1da177e4
LT		 3616}
3617
e4eff1a6 3618static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3619{
078ea3df
TM		 3620 struct nfs_unlinkdata *data = task->tk_calldata;
3621 struct nfs_removeres *res = &data->res;
e4eff1a6 3622
14516c3a
TM		 3623 if (!nfs4_sequence_done(task, &res->seq_res))
3624 return 0;
8478eaa1
N		 3625 if (nfs4_async_handle_error(task, res->server, NULL,
3626 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3627 return 0;
3628 update_changeattr(dir, &res->cinfo);
e4eff1a6 3629 return 1;
1da177e4
LT		 3630}
3631
d3d4152a
JL		 3632static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3633{
3634 struct nfs_server *server = NFS_SERVER(dir);
3635 struct nfs_renameargs *arg = msg->rpc_argp;
3636 struct nfs_renameres *res = msg->rpc_resp;
3637
3638 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3639 res->server = server;
a9c92d6b 3640 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3641}
3642
c6bfa1a1
BS		 3643static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3644{
d9afbd1b
TM		 3645 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3646 &data->args.seq_args,
3647 &data->res.seq_res,
3648 task);
d3d4152a
JL		 3649}
3650
3651static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3652 struct inode *new_dir)
3653{
fbc6f7c2
TM		 3654 struct nfs_renamedata *data = task->tk_calldata;
3655 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3656
3657 if (!nfs4_sequence_done(task, &res->seq_res))
3658 return 0;
8478eaa1 3659 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3660 return 0;
3661
3662 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3663 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3664 return 1;
3665}
3666
1da177e4
LT		 3667static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3668{
91ba2eee 3669 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3670 struct nfs4_link_arg arg = {
3671 .fh = NFS_FH(inode),
3672 .dir_fh = NFS_FH(dir),
3673 .name = name,
91ba2eee
TM		 3674 .bitmask = server->attr_bitmask,
3675 };
91ba2eee
TM		 3676 struct nfs4_link_res res = {
3677 .server = server,
1775fd3e 3678 .label = NULL,
1da177e4 3679 };
1da177e4
LT		 3680 struct rpc_message msg = {
3681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3682 .rpc_argp = &arg,
91ba2eee 3683 .rpc_resp = &res,
1da177e4 3684 };
136f2627
TM		 3685 int status = -ENOMEM;
3686
3687 res.fattr = nfs_alloc_fattr();
778d2817 3688 if (res.fattr == NULL)
136f2627 3689 goto out;
1da177e4 3690
14c43f76
DQ		 3691 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3692 if (IS_ERR(res.label)) {
3693 status = PTR_ERR(res.label);
3694 goto out;
3695 }
aa9c2669 3696 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3697
7c513058 3698 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3699 if (!status) {
3700 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3701 status = nfs_post_op_update_inode(inode, res.fattr);
3702 if (!status)
3703 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3704 }
14c43f76
DQ		 3705
3706
3707 nfs4_label_free(res.label);
3708
136f2627 3709out:
136f2627 3710 nfs_free_fattr(res.fattr);
1da177e4
LT		 3711 return status;
3712}
3713
3714static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3715{
3716 struct nfs4_exception exception = { };
3717 int err;
3718 do {
3719 err = nfs4_handle_exception(NFS_SERVER(inode),
3720 _nfs4_proc_link(inode, dir, name),
3721 &exception);
3722 } while (exception.retry);
3723 return err;
3724}
3725
57dc9a57
TM		 3726struct nfs4_createdata {
3727 struct rpc_message msg;
3728 struct nfs4_create_arg arg;
3729 struct nfs4_create_res res;
3730 struct nfs_fh fh;
3731 struct nfs_fattr fattr;
1775fd3e 3732 struct nfs4_label *label;
57dc9a57
TM		 3733};
3734
3735static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3736 struct qstr *name, struct iattr *sattr, u32 ftype)
3737{
3738 struct nfs4_createdata *data;
3739
3740 data = kzalloc(sizeof(*data), GFP_KERNEL);
3741 if (data != NULL) {
3742 struct nfs_server *server = NFS_SERVER(dir);
3743
14c43f76
DQ		 3744 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3745 if (IS_ERR(data->label))
3746 goto out_free;
3747
57dc9a57
TM		 3748 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3749 data->msg.rpc_argp = &data->arg;
3750 data->msg.rpc_resp = &data->res;
3751 data->arg.dir_fh = NFS_FH(dir);
3752 data->arg.server = server;
3753 data->arg.name = name;
3754 data->arg.attrs = sattr;
3755 data->arg.ftype = ftype;
aa9c2669 3756 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3757 data->res.server = server;
3758 data->res.fh = &data->fh;
3759 data->res.fattr = &data->fattr;
1775fd3e 3760 data->res.label = data->label;
57dc9a57 3761 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3762 }
3763 return data;
14c43f76
DQ		 3764out_free:
3765 kfree(data);
3766 return NULL;
57dc9a57
TM		 3767}
3768
3769static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3770{
7c513058 3771 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3772 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3773 if (status == 0) {
3774 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3775 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3776 }
3777 return status;
3778}
3779
3780static void nfs4_free_createdata(struct nfs4_createdata *data)
3781{
14c43f76 3782 nfs4_label_free(data->label);
57dc9a57
TM		 3783 kfree(data);
3784}
3785
4f390c15 3786static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3787 struct page *page, unsigned int len, struct iattr *sattr,
3788 struct nfs4_label *label)
1da177e4 3789{
57dc9a57
TM		 3790 struct nfs4_createdata *data;
3791 int status = -ENAMETOOLONG;
1da177e4 3792
94a6d753 3793 if (len > NFS4_MAXPATHLEN)
57dc9a57 3794 goto out;
4f390c15 3795
57dc9a57
TM		 3796 status = -ENOMEM;
3797 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3798 if (data == NULL)
3799 goto out;
3800
3801 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3802 data->arg.u.symlink.pages = &page;
3803 data->arg.u.symlink.len = len;
1775fd3e 3804 data->arg.label = label;
1da177e4 3805
57dc9a57
TM		 3806 status = nfs4_do_create(dir, dentry, data);
3807
3808 nfs4_free_createdata(data);
3809out:
1da177e4
LT		 3810 return status;
3811}
3812
4f390c15 3813static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3814 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3815{
3816 struct nfs4_exception exception = { };
aa9c2669 3817 struct nfs4_label l, *label = NULL;
1da177e4 3818 int err;
aa9c2669
DQ		 3819
3820 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3821
1da177e4 3822 do {
078ea3df
TM		 3823 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3824 trace_nfs4_symlink(dir, &dentry->d_name, err);
3825 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3826 &exception);
3827 } while (exception.retry);
aa9c2669
DQ		 3828
3829 nfs4_label_release_security(label);
1da177e4
LT		 3830 return err;
3831}
3832
3833static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3834 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3835{
57dc9a57
TM		 3836 struct nfs4_createdata *data;
3837 int status = -ENOMEM;
1da177e4 3838
57dc9a57
TM		 3839 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3840 if (data == NULL)
3841 goto out;
3842
1775fd3e 3843 data->arg.label = label;
57dc9a57
TM		 3844 status = nfs4_do_create(dir, dentry, data);
3845
3846 nfs4_free_createdata(data);
3847out:
1da177e4
LT		 3848 return status;
3849}
3850
3851static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3852 struct iattr *sattr)
3853{
3854 struct nfs4_exception exception = { };
aa9c2669 3855 struct nfs4_label l, *label = NULL;
1da177e4 3856 int err;
a8a5da99 3857
aa9c2669
DQ		 3858 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3859
a8a5da99 3860 sattr->ia_mode &= ~current_umask();
1da177e4 3861 do {
078ea3df
TM		 3862 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3863 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3864 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3865 &exception);
3866 } while (exception.retry);
aa9c2669
DQ		 3867 nfs4_label_release_security(label);
3868
1da177e4
LT		 3869 return err;
3870}
3871
3872static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3873 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3874{
2b0143b5 3875 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3876 struct nfs4_readdir_arg args = {
3877 .fh = NFS_FH(dir),
56e4ebf8 3878 .pages = pages,
1da177e4
LT		 3879 .pgbase = 0,
3880 .count = count,
2b0143b5 3881 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3882 .plus = plus,
1da177e4
LT		 3883 };
3884 struct nfs4_readdir_res res;
3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3887 .rpc_argp = &args,
3888 .rpc_resp = &res,
3889 .rpc_cred = cred,
3890 };
3891 int status;
3892
6de1472f
AV		 3893 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3894 dentry,
eadf4598 3895 (unsigned long long)cookie);
c3f52af3 3896 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3897 res.pgbase = args.pgbase;
7c513058 3898 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3899 if (status >= 0) {
c3f52af3 3900 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3901 status += args.pgbase;
3902 }
c4812998
TM		 3903
3904 nfs_invalidate_atime(dir);
3905
3110ff80 3906 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3907 return status;
3908}
3909
3910static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3911 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3912{
3913 struct nfs4_exception exception = { };
3914 int err;
3915 do {
c1578b76
TM		 3916 err = _nfs4_proc_readdir(dentry, cred, cookie,
3917 pages, count, plus);
2b0143b5
DH		 3918 trace_nfs4_readdir(d_inode(dentry), err);
3919 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3920 &exception);
3921 } while (exception.retry);
3922 return err;
3923}
3924
3925static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3926 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3927{
57dc9a57
TM		 3928 struct nfs4_createdata *data;
3929 int mode = sattr->ia_mode;
3930 int status = -ENOMEM;
1da177e4 3931
57dc9a57
TM		 3932 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3933 if (data == NULL)
3934 goto out;
3935
1da177e4 3936 if (S_ISFIFO(mode))
57dc9a57 3937 data->arg.ftype = NF4FIFO;
1da177e4 3938 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3939 data->arg.ftype = NF4BLK;
3940 data->arg.u.device.specdata1 = MAJOR(rdev);
3941 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3942 }
3943 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3944 data->arg.ftype = NF4CHR;
3945 data->arg.u.device.specdata1 = MAJOR(rdev);
3946 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3947 } else if (!S_ISSOCK(mode)) {
3948 status = -EINVAL;
3949 goto out_free;
1da177e4 3950 }
1775fd3e 3951
aa9c2669 3952 data->arg.label = label;
57dc9a57 3953 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3954out_free:
57dc9a57
TM		 3955 nfs4_free_createdata(data);
3956out:
1da177e4
LT		 3957 return status;
3958}
3959
3960static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3961 struct iattr *sattr, dev_t rdev)
3962{
3963 struct nfs4_exception exception = { };
aa9c2669 3964 struct nfs4_label l, *label = NULL;
1da177e4 3965 int err;
a8a5da99 3966
aa9c2669
DQ		 3967 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3968
a8a5da99 3969 sattr->ia_mode &= ~current_umask();
1da177e4 3970 do {
078ea3df
TM		 3971 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3972 trace_nfs4_mknod(dir, &dentry->d_name, err);
3973 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3974 &exception);
3975 } while (exception.retry);
aa9c2669
DQ		 3976
3977 nfs4_label_release_security(label);
3978
1da177e4
LT		 3979 return err;
3980}
3981
3982static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3983 struct nfs_fsstat *fsstat)
3984{
3985 struct nfs4_statfs_arg args = {
3986 .fh = fhandle,
3987 .bitmask = server->attr_bitmask,
3988 };
24ad148a
BH		 3989 struct nfs4_statfs_res res = {
3990 .fsstat = fsstat,
3991 };
1da177e4
LT		 3992 struct rpc_message msg = {
3993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3994 .rpc_argp = &args,
24ad148a 3995 .rpc_resp = &res,
1da177e4
LT		 3996 };
3997
0e574af1 3998 nfs_fattr_init(fsstat->fattr);
7c513058 3999 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4000}
4001
4002static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4003{
4004 struct nfs4_exception exception = { };
4005 int err;
4006 do {
4007 err = nfs4_handle_exception(server,
4008 _nfs4_proc_statfs(server, fhandle, fsstat),
4009 &exception);
4010 } while (exception.retry);
4011 return err;
4012}
4013
4014static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4015 struct nfs_fsinfo *fsinfo)
4016{
4017 struct nfs4_fsinfo_arg args = {
4018 .fh = fhandle,
4019 .bitmask = server->attr_bitmask,
4020 };
3dda5e43
BH		 4021 struct nfs4_fsinfo_res res = {
4022 .fsinfo = fsinfo,
4023 };
1da177e4
LT		 4024 struct rpc_message msg = {
4025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4026 .rpc_argp = &args,
3dda5e43 4027 .rpc_resp = &res,
1da177e4
LT		 4028 };
4029
7c513058 4030 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4031}
4032
4033static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4034{
4035 struct nfs4_exception exception = { };
83ca7f5a 4036 unsigned long now = jiffies;
1da177e4
LT		 4037 int err;
4038
4039 do {
83ca7f5a 4040 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4041 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4042 if (err == 0) {
4043 struct nfs_client *clp = server->nfs_client;
4044
4045 spin_lock(&clp->cl_lock);
4046 clp->cl_lease_time = fsinfo->lease_time * HZ;
4047 clp->cl_last_renewal = now;
4048 spin_unlock(&clp->cl_lock);
4049 break;
4050 }
4051 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4052 } while (exception.retry);
4053 return err;
4054}
4055
4056static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4057{
e38eb650
BS		 4058 int error;
4059
0e574af1 4060 nfs_fattr_init(fsinfo->fattr);
e38eb650 4061 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4062 if (error == 0) {
4063 /* block layout checks this! */
4064 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4065 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4066 }
e38eb650
BS		 4067
4068 return error;
1da177e4
LT		 4069}
4070
4071static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4072 struct nfs_pathconf *pathconf)
4073{
4074 struct nfs4_pathconf_arg args = {
4075 .fh = fhandle,
4076 .bitmask = server->attr_bitmask,
4077 };
d45b2989
BH		 4078 struct nfs4_pathconf_res res = {
4079 .pathconf = pathconf,
4080 };
1da177e4
LT		 4081 struct rpc_message msg = {
4082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4083 .rpc_argp = &args,
d45b2989 4084 .rpc_resp = &res,
1da177e4
LT		 4085 };
4086
4087 /* None of the pathconf attributes are mandatory to implement */
4088 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4089 memset(pathconf, 0, sizeof(*pathconf));
4090 return 0;
4091 }
4092
0e574af1 4093 nfs_fattr_init(pathconf->fattr);
7c513058 4094 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4095}
4096
4097static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4098 struct nfs_pathconf *pathconf)
4099{
4100 struct nfs4_exception exception = { };
4101 int err;
4102
4103 do {
4104 err = nfs4_handle_exception(server,
4105 _nfs4_proc_pathconf(server, fhandle, pathconf),
4106 &exception);
4107 } while (exception.retry);
4108 return err;
4109}
4110
5521abfd 4111int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4112 const struct nfs_open_context *ctx,
4113 const struct nfs_lock_context *l_ctx,
4114 fmode_t fmode)
4115{
4116 const struct nfs_lockowner *lockowner = NULL;
4117
4118 if (l_ctx != NULL)
4119 lockowner = &l_ctx->lockowner;
5521abfd 4120 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4121}
4122EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4123
5521abfd
TM		 4124static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4125 const struct nfs_open_context *ctx,
4126 const struct nfs_lock_context *l_ctx,
4127 fmode_t fmode)
4128{
4129 nfs4_stateid current_stateid;
4130
e1253be0
TM		 4131 /* If the current stateid represents a lost lock, then exit */
4132 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4133 return true;
5521abfd
TM		 4134 return nfs4_stateid_match(stateid, &current_stateid);
4135}
4136
4137static bool nfs4_error_stateid_expired(int err)
4138{
4139 switch (err) {
4140 case -NFS4ERR_DELEG_REVOKED:
4141 case -NFS4ERR_ADMIN_REVOKED:
4142 case -NFS4ERR_BAD_STATEID:
4143 case -NFS4ERR_STALE_STATEID:
4144 case -NFS4ERR_OLD_STATEID:
4145 case -NFS4ERR_OPENMODE:
4146 case -NFS4ERR_EXPIRED:
4147 return true;
4148 }
4149 return false;
4150}
4151
d45f60c6 4152void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4153{
d45f60c6 4154 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4155}
4156
d45f60c6 4157static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4158{
d45f60c6 4159 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4160
d45f60c6
WAA		 4161 trace_nfs4_read(hdr, task->tk_status);
4162 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4163 hdr->args.context->state,
4164 NULL) == -EAGAIN) {
d00c5d43 4165 rpc_restart_call_prepare(task);
ec06c096 4166 return -EAGAIN;
1da177e4 4167 }
8850df99 4168
d45f60c6 4169 __nfs4_read_done_cb(hdr);
1da177e4 4170 if (task->tk_status > 0)
d45f60c6 4171 renew_lease(server, hdr->timestamp);
ec06c096 4172 return 0;
1da177e4
LT		 4173}
4174
5521abfd 4175static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4176 struct nfs_pgio_args *args)
5521abfd
TM		 4177{
4178
4179 if (!nfs4_error_stateid_expired(task->tk_status) ||
4180 nfs4_stateid_is_current(&args->stateid,
4181 args->context,
4182 args->lock_context,
4183 FMODE_READ))
4184 return false;
4185 rpc_restart_call_prepare(task);
4186 return true;
4187}
4188
d45f60c6 4189static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4190{
4191
4192 dprintk("--> %s\n", __func__);
4193
d45f60c6 4194 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4195 return -EAGAIN;
d45f60c6 4196 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4197 return -EAGAIN;
d45f60c6
WAA		 4198 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4199 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4200}
4201
d45f60c6
WAA		 4202static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4203 struct rpc_message *msg)
1da177e4 4204{
d45f60c6
WAA		 4205 hdr->timestamp = jiffies;
4206 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4207 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4208 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4209}
4210
d45f60c6
WAA		 4211static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4212 struct nfs_pgio_header *hdr)
ea7c3303 4213{
d45f60c6
WAA		 4214 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4215 &hdr->args.seq_args,
4216 &hdr->res.seq_res,
9b206149 4217 task))
ef1820f9 4218 return 0;
d45f60c6
WAA		 4219 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4220 hdr->args.lock_context,
4221 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4222 return -EIO;
d45f60c6 4223 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4224 return -EIO;
4225 return 0;
1da177e4
LT		 4226}
4227
d45f60c6
WAA		 4228static int nfs4_write_done_cb(struct rpc_task *task,
4229 struct nfs_pgio_header *hdr)
1da177e4 4230{
d45f60c6 4231 struct inode *inode = hdr->inode;
8478eaa1 4232
d45f60c6
WAA		 4233 trace_nfs4_write(hdr, task->tk_status);
4234 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4235 hdr->args.context->state,
4236 NULL) == -EAGAIN) {
d00c5d43 4237 rpc_restart_call_prepare(task);
788e7a89 4238 return -EAGAIN;
1da177e4 4239 }
4f9838c7 4240 if (task->tk_status >= 0) {
d45f60c6 4241 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4242 nfs_writeback_update_inode(hdr);
4f9838c7 4243 }
788e7a89 4244 return 0;
1da177e4
LT		 4245}
4246
5521abfd 4247static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4248 struct nfs_pgio_args *args)
5521abfd
TM		 4249{
4250
4251 if (!nfs4_error_stateid_expired(task->tk_status) ||
4252 nfs4_stateid_is_current(&args->stateid,
4253 args->context,
4254 args->lock_context,
4255 FMODE_WRITE))
4256 return false;
4257 rpc_restart_call_prepare(task);
4258 return true;
4259}
4260
d45f60c6 4261static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4262{
d45f60c6 4263 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4264 return -EAGAIN;
d45f60c6 4265 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4266 return -EAGAIN;
d45f60c6
WAA		 4267 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4268 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4269}
4270
5a37f851 4271static
d45f60c6 4272bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4273{
5a37f851 4274 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4275 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4276 return false;
4277 /* Otherwise, request attributes if and only if we don't hold
4278 * a delegation
4279 */
011e2a7f 4280 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4281}
a69aef14 4282
d45f60c6
WAA		 4283static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4284 struct rpc_message *msg)
1da177e4 4285{
d45f60c6 4286 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4287
d45f60c6
WAA		 4288 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4289 hdr->args.bitmask = NULL;
4290 hdr->res.fattr = NULL;
7ffd1064 4291 } else
d45f60c6 4292 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4293
d45f60c6
WAA		 4294 if (!hdr->pgio_done_cb)
4295 hdr->pgio_done_cb = nfs4_write_done_cb;
4296 hdr->res.server = server;
4297 hdr->timestamp = jiffies;
1da177e4 4298
bdc7f021 4299 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4300 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4301}
4302
0b7c0153 4303static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4304{
d9afbd1b
TM		 4305 nfs4_setup_sequence(NFS_SERVER(data->inode),
4306 &data->args.seq_args,
4307 &data->res.seq_res,
4308 task);
1da177e4
LT		 4309}
4310
0b7c0153 4311static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4312{
1da177e4 4313 struct inode *inode = data->inode;
14516c3a 4314
cc668ab3 4315 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4316 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4317 NULL, NULL) == -EAGAIN) {
d00c5d43 4318 rpc_restart_call_prepare(task);
788e7a89 4319 return -EAGAIN;
1da177e4 4320 }
788e7a89 4321 return 0;
1da177e4
LT		 4322}
4323
0b7c0153 4324static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4325{
4326 if (!nfs4_sequence_done(task, &data->res.seq_res))
4327 return -EAGAIN;
0b7c0153 4328 return data->commit_done_cb(task, data);
5f452431
FI		 4329}
4330
0b7c0153 4331static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4332{
788e7a89 4333 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4334
0b7c0153
FI		 4335 if (data->commit_done_cb == NULL)
4336 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4337 data->res.server = server;
bdc7f021 4338 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4339 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4340}
4341
9bc4e3ca
CL		 4342struct nfs4_renewdata {
4343 struct nfs_client *client;
4344 unsigned long timestamp;
4345};
4346
1da177e4
LT		 4347/*
4348 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4349 * standalone procedure for queueing an asynchronous RENEW.
4350 */
9bc4e3ca 4351static void nfs4_renew_release(void *calldata)
dc96aef9 4352{
9bc4e3ca
CL		 4353 struct nfs4_renewdata *data = calldata;
4354 struct nfs_client *clp = data->client;
dc96aef9 4355
0851de06
AB		 4356 if (atomic_read(&clp->cl_count) > 1)
4357 nfs4_schedule_state_renewal(clp);
4358 nfs_put_client(clp);
9bc4e3ca 4359 kfree(data);
dc96aef9
AB		 4360}
4361
9bc4e3ca 4362static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4363{
9bc4e3ca
CL		 4364 struct nfs4_renewdata *data = calldata;
4365 struct nfs_client *clp = data->client;
4366 unsigned long timestamp = data->timestamp;
1da177e4 4367
c6d01c6f 4368 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4369 switch (task->tk_status) {
4370 case 0:
4371 break;
4372 case -NFS4ERR_LEASE_MOVED:
4373 nfs4_schedule_lease_moved_recovery(clp);
4374 break;
4375 default:
95baa25c 4376 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4377 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4378 return;
4379 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4380 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4381 return;
4382 }
4383 nfs4_schedule_path_down_recovery(clp);
1da177e4 4384 }
452e9352 4385 do_renew_lease(clp, timestamp);
1da177e4
LT		 4386}
4387
963d8fe5
TM		 4388static const struct rpc_call_ops nfs4_renew_ops = {
4389 .rpc_call_done = nfs4_renew_done,
dc96aef9 4390 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4391};
4392
2f60ea6b 4393static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4394{
4395 struct rpc_message msg = {
4396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4397 .rpc_argp = clp,
b4454fe1 4398 .rpc_cred = cred,
1da177e4 4399 };
9bc4e3ca 4400 struct nfs4_renewdata *data;
1da177e4 4401
2f60ea6b
TM		 4402 if (renew_flags == 0)
4403 return 0;
0851de06
AB		 4404 if (!atomic_inc_not_zero(&clp->cl_count))
4405 return -EIO;
b569ad34 4406 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4407 if (data == NULL)
4408 return -ENOMEM;
4409 data->client = clp;
4410 data->timestamp = jiffies;
bc7a05ca 4411 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4412 &nfs4_renew_ops, data);
1da177e4
LT		 4413}
4414
8534d4ec 4415static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4416{
4417 struct rpc_message msg = {
4418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4419 .rpc_argp = clp,
b4454fe1 4420 .rpc_cred = cred,
1da177e4
LT		 4421 };
4422 unsigned long now = jiffies;
4423 int status;
4424
bc7a05ca 4425 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4426 if (status < 0)
4427 return status;
452e9352 4428 do_renew_lease(clp, now);
1da177e4
LT		 4429 return 0;
4430}
4431
aa1870af
BF		 4432static inline int nfs4_server_supports_acls(struct nfs_server *server)
4433{
7dd7d959 4434 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4435}
4436
21f498c2
TM		 4437/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4438 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4439 * the stack.
4440 */
21f498c2 4441#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4442
e9e3d724
NH		 4443static int buf_to_pages_noslab(const void *buf, size_t buflen,
4444 struct page **pages, unsigned int *pgbase)
4445{
4446 struct page *newpage, **spages;
4447 int rc = 0;
4448 size_t len;
4449 spages = pages;
4450
4451 do {
21f498c2 4452 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4453 newpage = alloc_page(GFP_KERNEL);
4454
4455 if (newpage == NULL)
4456 goto unwind;
4457 memcpy(page_address(newpage), buf, len);
4458 buf += len;
4459 buflen -= len;
4460 *pages++ = newpage;
4461 rc++;
4462 } while (buflen != 0);
4463
4464 return rc;
4465
4466unwind:
4467 for(; rc > 0; rc--)
4468 __free_page(spages[rc-1]);
4469 return -ENOMEM;
4470}
4471
e50a1c2e
BF		 4472struct nfs4_cached_acl {
4473 int cached;
4474 size_t len;
3e9d4154 4475 char data[0];
e50a1c2e
BF		 4476};
4477
4478static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4479{
4480 struct nfs_inode *nfsi = NFS_I(inode);
4481
4482 spin_lock(&inode->i_lock);
4483 kfree(nfsi->nfs4_acl);
4484 nfsi->nfs4_acl = acl;
4485 spin_unlock(&inode->i_lock);
4486}
4487
4488static void nfs4_zap_acl_attr(struct inode *inode)
4489{
4490 nfs4_set_cached_acl(inode, NULL);
4491}
4492
4493static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4494{
4495 struct nfs_inode *nfsi = NFS_I(inode);
4496 struct nfs4_cached_acl *acl;
4497 int ret = -ENOENT;
4498
4499 spin_lock(&inode->i_lock);
4500 acl = nfsi->nfs4_acl;
4501 if (acl == NULL)
4502 goto out;
4503 if (buf == NULL) /* user is just asking for length */
4504 goto out_len;
4505 if (acl->cached == 0)
4506 goto out;
4507 ret = -ERANGE; /* see getxattr(2) man page */
4508 if (acl->len > buflen)
4509 goto out;
4510 memcpy(buf, acl->data, acl->len);
4511out_len:
4512 ret = acl->len;
4513out:
4514 spin_unlock(&inode->i_lock);
4515 return ret;
4516}
4517
5794d21e 4518static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4519{
4520 struct nfs4_cached_acl *acl;
b291f1b1 4521 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4522
1f1ea6c2 4523 if (buflen <= PAGE_SIZE) {
b291f1b1 4524 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4525 if (acl == NULL)
4526 goto out;
4527 acl->cached = 1;
5794d21e 4528 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4529 } else {
4530 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4531 if (acl == NULL)
4532 goto out;
4533 acl->cached = 0;
4534 }
4535 acl->len = acl_len;
4536out:
4537 nfs4_set_cached_acl(inode, acl);
4538}
4539
bf118a34
AA		 4540/*
4541 * The getxattr API returns the required buffer length when called with a
4542 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4543 * the required buf. On a NULL buf, we send a page of data to the server
4544 * guessing that the ACL request can be serviced by a page. If so, we cache
4545 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4546 * the cache. If not so, we throw away the page, and cache the required
4547 * length. The next getxattr call will then produce another round trip to
4548 * the server, this time with the input buf of the required size.
4549 */
16b4289c 4550static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4551{
bf118a34 4552 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4553 struct nfs_getaclargs args = {
4554 .fh = NFS_FH(inode),
4555 .acl_pages = pages,
4556 .acl_len = buflen,
4557 };
663c79b3
BH		 4558 struct nfs_getaclres res = {
4559 .acl_len = buflen,
4560 };
aa1870af
BF		 4561 struct rpc_message msg = {
4562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4563 .rpc_argp = &args,
663c79b3 4564 .rpc_resp = &res,
aa1870af 4565 };
21f498c2
TM		 4566 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4567 int ret = -ENOMEM, i;
aa1870af 4568
bf118a34
AA		 4569 /* As long as we're doing a round trip to the server anyway,
4570 * let's be prepared for a page of acl data. */
4571 if (npages == 0)
4572 npages = 1;
21f498c2
TM		 4573 if (npages > ARRAY_SIZE(pages))
4574 return -ERANGE;
5a006899 4575
bf118a34
AA		 4576 for (i = 0; i < npages; i++) {
4577 pages[i] = alloc_page(GFP_KERNEL);
4578 if (!pages[i])
4579 goto out_free;
e50a1c2e 4580 }
5a006899
SP		 4581
4582 /* for decoding across pages */
4583 res.acl_scratch = alloc_page(GFP_KERNEL);
4584 if (!res.acl_scratch)
4585 goto out_free;
4586
bf118a34
AA		 4587 args.acl_len = npages * PAGE_SIZE;
4588 args.acl_pgbase = 0;
5a006899 4589
de040bec 4590 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4591 __func__, buf, buflen, npages, args.acl_len);
4592 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4593 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4594 if (ret)
4595 goto out_free;
bf118a34 4596
1f1ea6c2
TM		 4597 /* Handle the case where the passed-in buffer is too short */
4598 if (res.acl_flags & NFS4_ACL_TRUNC) {
4599 /* Did the user only issue a request for the acl length? */
4600 if (buf == NULL)
4601 goto out_ok;
e50a1c2e 4602 ret = -ERANGE;
1f1ea6c2 4603 goto out_free;
e50a1c2e 4604 }
1f1ea6c2 4605 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4606 if (buf) {
4607 if (res.acl_len > buflen) {
4608 ret = -ERANGE;
4609 goto out_free;
4610 }
1f1ea6c2 4611 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4612 }
1f1ea6c2
TM		 4613out_ok:
4614 ret = res.acl_len;
e50a1c2e 4615out_free:
bf118a34
AA		 4616 for (i = 0; i < npages; i++)
4617 if (pages[i])
4618 __free_page(pages[i]);
331818f1
TM		 4619 if (res.acl_scratch)
4620 __free_page(res.acl_scratch);
aa1870af
BF		 4621 return ret;
4622}
4623
16b4289c
TM		 4624static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4625{
4626 struct nfs4_exception exception = { };
4627 ssize_t ret;
4628 do {
4629 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4630 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4631 if (ret >= 0)
4632 break;
4633 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4634 } while (exception.retry);
4635 return ret;
4636}
4637
e50a1c2e
BF		 4638static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4639{
4640 struct nfs_server *server = NFS_SERVER(inode);
4641 int ret;
4642
4643 if (!nfs4_server_supports_acls(server))
4644 return -EOPNOTSUPP;
4645 ret = nfs_revalidate_inode(server, inode);
4646 if (ret < 0)
4647 return ret;
08a22b39
AK		 4648 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4649 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4650 ret = nfs4_read_cached_acl(inode, buf, buflen);
4651 if (ret != -ENOENT)
bf118a34
AA		 4652 /* -ENOENT is returned if there is no ACL or if there is an ACL
4653 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4654 return ret;
4655 return nfs4_get_acl_uncached(inode, buf, buflen);
4656}
4657
16b4289c 4658static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4659{
4660 struct nfs_server *server = NFS_SERVER(inode);
4661 struct page *pages[NFS4ACL_MAXPAGES];
4662 struct nfs_setaclargs arg = {
4663 .fh = NFS_FH(inode),
4664 .acl_pages = pages,
4665 .acl_len = buflen,
4666 };
73c403a9 4667 struct nfs_setaclres res;
4b580ee3
BF		 4668 struct rpc_message msg = {
4669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4670 .rpc_argp = &arg,
73c403a9 4671 .rpc_resp = &res,
4b580ee3 4672 };
21f498c2 4673 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4674 int ret, i;
4b580ee3
BF		 4675
4676 if (!nfs4_server_supports_acls(server))
4677 return -EOPNOTSUPP;
21f498c2
TM		 4678 if (npages > ARRAY_SIZE(pages))
4679 return -ERANGE;
e9e3d724
NH		 4680 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4681 if (i < 0)
4682 return i;
57ec14c5 4683 nfs4_inode_return_delegation(inode);
7c513058 4684 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4685
4686 /*
4687 * Free each page after tx, so the only ref left is
4688 * held by the network stack
4689 */
4690 for (; i > 0; i--)
4691 put_page(pages[i-1]);
4692
08a22b39
AK		 4693 /*
4694 * Acl update can result in inode attribute update.
4695 * so mark the attribute cache invalid.
4696 */
4697 spin_lock(&inode->i_lock);
4698 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4699 spin_unlock(&inode->i_lock);
f41f7418
TM		 4700 nfs_access_zap_cache(inode);
4701 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4702 return ret;
4703}
4704
16b4289c
TM		 4705static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4706{
4707 struct nfs4_exception exception = { };
4708 int err;
4709 do {
c1578b76
TM		 4710 err = __nfs4_proc_set_acl(inode, buf, buflen);
4711 trace_nfs4_set_acl(inode, err);
4712 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4713 &exception);
4714 } while (exception.retry);
4715 return err;
4716}
4717
aa9c2669
DQ		 4718#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4719static int _nfs4_get_security_label(struct inode *inode, void *buf,
4720 size_t buflen)
4721{
4722 struct nfs_server *server = NFS_SERVER(inode);
4723 struct nfs_fattr fattr;
4724 struct nfs4_label label = {0, 0, buflen, buf};
4725
4726 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4727 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4728 .fh = NFS_FH(inode),
4729 .bitmask = bitmask,
4730 };
4731 struct nfs4_getattr_res res = {
4732 .fattr = &fattr,
4733 .label = &label,
4734 .server = server,
4735 };
4736 struct rpc_message msg = {
4737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4738 .rpc_argp = &arg,
aa9c2669
DQ		 4739 .rpc_resp = &res,
4740 };
4741 int ret;
4742
4743 nfs_fattr_init(&fattr);
4744
fcb63a9b 4745 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4746 if (ret)
4747 return ret;
4748 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4749 return -ENOENT;
4750 if (buflen < label.len)
4751 return -ERANGE;
4752 return 0;
4753}
4754
4755static int nfs4_get_security_label(struct inode *inode, void *buf,
4756 size_t buflen)
4757{
4758 struct nfs4_exception exception = { };
4759 int err;
4760
4761 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4762 return -EOPNOTSUPP;
4763
4764 do {
c1578b76
TM		 4765 err = _nfs4_get_security_label(inode, buf, buflen);
4766 trace_nfs4_get_security_label(inode, err);
4767 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4768 &exception);
4769 } while (exception.retry);
4770 return err;
4771}
4772
4773static int _nfs4_do_set_security_label(struct inode *inode,
4774 struct nfs4_label *ilabel,
4775 struct nfs_fattr *fattr,
4776 struct nfs4_label *olabel)
4777{
4778
4779 struct iattr sattr = {0};
4780 struct nfs_server *server = NFS_SERVER(inode);
4781 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4782 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4783 .fh = NFS_FH(inode),
4784 .iap = &sattr,
4785 .server = server,
4786 .bitmask = bitmask,
4787 .label = ilabel,
4788 };
4789 struct nfs_setattrres res = {
4790 .fattr = fattr,
4791 .label = olabel,
4792 .server = server,
4793 };
4794 struct rpc_message msg = {
4795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4796 .rpc_argp = &arg,
aa9c2669
DQ		 4797 .rpc_resp = &res,
4798 };
4799 int status;
4800
12207f69 4801 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4802
12207f69 4803 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4804 if (status)
4805 dprintk("%s failed: %d\n", __func__, status);
4806
4807 return status;
4808}
4809
4810static int nfs4_do_set_security_label(struct inode *inode,
4811 struct nfs4_label *ilabel,
4812 struct nfs_fattr *fattr,
4813 struct nfs4_label *olabel)
4814{
4815 struct nfs4_exception exception = { };
4816 int err;
4817
4818 do {
c1578b76
TM		 4819 err = _nfs4_do_set_security_label(inode, ilabel,
4820 fattr, olabel);
4821 trace_nfs4_set_security_label(inode, err);
4822 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4823 &exception);
4824 } while (exception.retry);
4825 return err;
4826}
4827
4828static int
4829nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4830{
4831 struct nfs4_label ilabel, *olabel = NULL;
4832 struct nfs_fattr fattr;
4833 struct rpc_cred *cred;
2b0143b5 4834 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4835 int status;
4836
4837 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4838 return -EOPNOTSUPP;
4839
4840 nfs_fattr_init(&fattr);
4841
4842 ilabel.pi = 0;
4843 ilabel.lfs = 0;
4844 ilabel.label = (char *)buf;
4845 ilabel.len = buflen;
4846
4847 cred = rpc_lookup_cred();
4848 if (IS_ERR(cred))
4849 return PTR_ERR(cred);
4850
4851 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4852 if (IS_ERR(olabel)) {
4853 status = -PTR_ERR(olabel);
4854 goto out;
4855 }
4856
4857 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4858 if (status == 0)
4859 nfs_setsecurity(inode, &fattr, olabel);
4860
4861 nfs4_label_free(olabel);
4862out:
4863 put_rpccred(cred);
4864 return status;
4865}
4866#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4867
4868
1da177e4 4869static int
8478eaa1
N		 4870nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4871 struct nfs4_state *state, long *timeout)
1da177e4 4872{
aa5190d0
TM		 4873 struct nfs_client *clp = server->nfs_client;
4874
4875 if (task->tk_status >= 0)
1da177e4
LT		 4876 return 0;
4877 switch(task->tk_status) {
a1d0b5ee 4878 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4879 case -NFS4ERR_ADMIN_REVOKED:
4880 case -NFS4ERR_BAD_STATEID:
4881 case -NFS4ERR_OPENMODE:
4882 if (state == NULL)
4883 break;
5d422301 4884 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4885 goto recovery_failed;
0400a6b0 4886 goto wait_on_recovery;
0ced63d1 4887 case -NFS4ERR_EXPIRED:
5d422301
TM		 4888 if (state != NULL) {
4889 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4890 goto recovery_failed;
5d422301 4891 }
1da177e4 4892 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4893 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4894 nfs4_schedule_lease_recovery(clp);
4895 goto wait_on_recovery;
519ae255
CL		 4896 case -NFS4ERR_MOVED:
4897 if (nfs4_schedule_migration_recovery(server) < 0)
4898 goto recovery_failed;
4899 goto wait_on_recovery;
8ef2f8d4
CL		 4900 case -NFS4ERR_LEASE_MOVED:
4901 nfs4_schedule_lease_moved_recovery(clp);
4902 goto wait_on_recovery;
4745e315
AA		 4903#if defined(CONFIG_NFS_V4_1)
4904 case -NFS4ERR_BADSESSION:
4905 case -NFS4ERR_BADSLOT:
4906 case -NFS4ERR_BAD_HIGH_SLOT:
4907 case -NFS4ERR_DEADSESSION:
4908 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4909 case -NFS4ERR_SEQ_FALSE_RETRY:
4910 case -NFS4ERR_SEQ_MISORDERED:
4911 dprintk("%s ERROR %d, Reset session\n", __func__,
4912 task->tk_status);
9f594791 4913 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4914 goto wait_on_recovery;
4745e315 4915#endif /* CONFIG_NFS_V4_1 */
1da177e4 4916 case -NFS4ERR_DELAY:
aa5190d0 4917 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4918 rpc_delay(task, nfs4_update_delay(timeout));
4919 goto restart_call;
006ea73e 4920 case -NFS4ERR_GRACE:
1da177e4 4921 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4922 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4923 case -NFS4ERR_OLD_STATEID:
f1478c13 4924 goto restart_call;
1da177e4
LT		 4925 }
4926 task->tk_status = nfs4_map_errors(task->tk_status);
4927 return 0;
9f51a78e 4928recovery_failed:
5d422301
TM		 4929 task->tk_status = -EIO;
4930 return 0;
0400a6b0 4931wait_on_recovery:
a2c0b9e2 4932 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4933 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4934 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4935 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4936 goto recovery_failed;
f1478c13 4937restart_call:
a2c0b9e2
TM		 4938 task->tk_status = 0;
4939 return -EAGAIN;
1da177e4
LT		 4940}
4941
f092075d
CL		 4942static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4943 nfs4_verifier *bootverf)
cd93710e
CL		 4944{
4945 __be32 verf[2];
4946
2c820d9a
CL		 4947 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4948 /* An impossible timestamp guarantees this value
4949 * will never match a generated boot time. */
4950 verf[0] = 0;
17f26b12 4951 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4952 } else {
f092075d 4953 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4954 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4955 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4956 }
cd93710e
CL		 4957 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4958}
4959
e984a55a 4960static unsigned int
ceb3a16c 4961nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4962 char *buf, size_t len)
4963{
4964 unsigned int result;
4965
ceb3a16c
TM		 4966 if (clp->cl_owner_id != NULL)
4967 return strlcpy(buf, clp->cl_owner_id, len);
4968
e984a55a
CL		 4969 rcu_read_lock();
4970 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4971 clp->cl_ipaddr,
4972 rpc_peeraddr2str(clp->cl_rpcclient,
4973 RPC_DISPLAY_ADDR),
4974 rpc_peeraddr2str(clp->cl_rpcclient,
4975 RPC_DISPLAY_PROTO));
4976 rcu_read_unlock();
ceb3a16c 4977 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4978 return result;
4979}
4980
4981static unsigned int
ceb3a16c 4982nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4983 char *buf, size_t len)
4984{
55b59293 4985 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4986 unsigned int result;
4987
4988 if (clp->cl_owner_id != NULL)
4989 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4990
4991 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4992 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4993 clp->rpc_ops->version,
4994 clp->cl_minorversion,
4995 nfs4_client_id_uniquifier,
4996 nodename);
ceb3a16c
TM		 4997 else
4998 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4999 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 5000 nodename);
ceb3a16c
TM		 5001 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
5002 return result;
e984a55a
CL		 5003}
5004
706cb8db
CL		 5005/*
5006 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5007 * services. Advertise one based on the address family of the
5008 * clientaddr.
5009 */
5010static unsigned int
5011nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5012{
5013 if (strchr(clp->cl_ipaddr, ':') != NULL)
5014 return scnprintf(buf, len, "tcp6");
5015 else
5016 return scnprintf(buf, len, "tcp");
5017}
5018
f11b2a1c
JL		 5019static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5020{
5021 struct nfs4_setclientid *sc = calldata;
5022
5023 if (task->tk_status == 0)
5024 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5025}
5026
5027static const struct rpc_call_ops nfs4_setclientid_ops = {
5028 .rpc_call_done = nfs4_setclientid_done,
5029};
5030
6bbb4ae8
CL		 5031/**
5032 * nfs4_proc_setclientid - Negotiate client ID
5033 * @clp: state data structure
5034 * @program: RPC program for NFSv4 callback service
5035 * @port: IP port number for NFS4 callback service
5036 * @cred: RPC credential to use for this call
5037 * @res: where to place the result
5038 *
5039 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5040 */
bb8b27e5
TM		 5041int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5042 unsigned short port, struct rpc_cred *cred,
5043 struct nfs4_setclientid_res *res)
1da177e4
LT		 5044{
5045 nfs4_verifier sc_verifier;
5046 struct nfs4_setclientid setclientid = {
5047 .sc_verifier = &sc_verifier,
5048 .sc_prog = program,
f4eecd5d 5049 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5050 };
5051 struct rpc_message msg = {
5052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5053 .rpc_argp = &setclientid,
bb8b27e5 5054 .rpc_resp = res,
286d7d6a 5055 .rpc_cred = cred,
1da177e4 5056 };
f11b2a1c
JL		 5057 struct rpc_task *task;
5058 struct rpc_task_setup task_setup_data = {
5059 .rpc_client = clp->cl_rpcclient,
5060 .rpc_message = &msg,
5061 .callback_ops = &nfs4_setclientid_ops,
5062 .callback_data = &setclientid,
5063 .flags = RPC_TASK_TIMEOUT,
5064 };
6bbb4ae8 5065 int status;
1da177e4 5066
de734831 5067 /* nfs_client_id4 */
f092075d 5068 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5069 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5070 setclientid.sc_name_len =
5071 nfs4_init_uniform_client_string(clp,
5072 setclientid.sc_name,
5073 sizeof(setclientid.sc_name));
5074 else
5075 setclientid.sc_name_len =
5076 nfs4_init_nonuniform_client_string(clp,
5077 setclientid.sc_name,
5078 sizeof(setclientid.sc_name));
de734831 5079 /* cb_client4 */
706cb8db
CL		 5080 setclientid.sc_netid_len =
5081 nfs4_init_callback_netid(clp,
5082 setclientid.sc_netid,
5083 sizeof(setclientid.sc_netid));
de734831 5084 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5085 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5086 clp->cl_ipaddr, port >> 8, port & 255);
5087
6bbb4ae8
CL		 5088 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5089 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5090 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5091 task = rpc_run_task(&task_setup_data);
5092 if (IS_ERR(task)) {
5093 status = PTR_ERR(task);
5094 goto out;
5095 }
5096 status = task->tk_status;
5097 if (setclientid.sc_cred) {
5098 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5099 put_rpccred(setclientid.sc_cred);
5100 }
5101 rpc_put_task(task);
5102out:
c6d01c6f 5103 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5104 dprintk("NFS reply setclientid: %d\n", status);
5105 return status;
1da177e4
LT		 5106}
5107
6bbb4ae8
CL		 5108/**
5109 * nfs4_proc_setclientid_confirm - Confirm client ID
5110 * @clp: state data structure
5111 * @res: result of a previous SETCLIENTID
5112 * @cred: RPC credential to use for this call
5113 *
5114 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5115 */
fd954ae1 5116int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5117 struct nfs4_setclientid_res *arg,
5118 struct rpc_cred *cred)
1da177e4 5119{
1da177e4
LT		 5120 struct rpc_message msg = {
5121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5122 .rpc_argp = arg,
286d7d6a 5123 .rpc_cred = cred,
1da177e4 5124 };
1da177e4
LT		 5125 int status;
5126
6bbb4ae8
CL		 5127 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5128 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5129 clp->cl_clientid);
1bd714f2 5130 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5131 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5132 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5133 return status;
5134}
5135
fe650407
TM		 5136struct nfs4_delegreturndata {
5137 struct nfs4_delegreturnargs args;
fa178f29 5138 struct nfs4_delegreturnres res;
fe650407
TM		 5139 struct nfs_fh fh;
5140 nfs4_stateid stateid;
26e976a8 5141 unsigned long timestamp;
fa178f29 5142 struct nfs_fattr fattr;
fe650407 5143 int rpc_status;
039b756a
PT		 5144 struct inode *inode;
5145 bool roc;
5146 u32 roc_barrier;
fe650407
TM		 5147};
5148
fe650407
TM		 5149static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5150{
5151 struct nfs4_delegreturndata *data = calldata;
938e1010 5152
14516c3a
TM		 5153 if (!nfs4_sequence_done(task, &data->res.seq_res))
5154 return;
938e1010 5155
ca8acf8d 5156 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5157 switch (task->tk_status) {
79708861 5158 case 0:
fa178f29 5159 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5160 case -NFS4ERR_ADMIN_REVOKED:
5161 case -NFS4ERR_DELEG_REVOKED:
5162 case -NFS4ERR_BAD_STATEID:
5163 case -NFS4ERR_OLD_STATEID:
5164 case -NFS4ERR_STALE_STATEID:
5165 case -NFS4ERR_EXPIRED:
5166 task->tk_status = 0;
039b756a
PT		 5167 if (data->roc)
5168 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5169 break;
79708861 5170 default:
8478eaa1
N		 5171 if (nfs4_async_handle_error(task, data->res.server,
5172 NULL, NULL) == -EAGAIN) {
d00c5d43 5173 rpc_restart_call_prepare(task);
79708861
RL		 5174 return;
5175 }
5176 }
5177 data->rpc_status = task->tk_status;
fe650407
TM		 5178}
5179
5180static void nfs4_delegreturn_release(void *calldata)
5181{
039b756a 5182 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5183 struct inode *inode = data->inode;
039b756a 5184
ea7c38fe
TM		 5185 if (inode) {
5186 if (data->roc)
5187 pnfs_roc_release(inode);
5188 nfs_iput_and_deactive(inode);
5189 }
fe650407
TM		 5190 kfree(calldata);
5191}
5192
938e1010
AA		 5193static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5194{
5195 struct nfs4_delegreturndata *d_data;
5196
5197 d_data = (struct nfs4_delegreturndata *)data;
5198
039b756a
PT		 5199 if (d_data->roc &&
5200 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5201 return;
5202
d9afbd1b
TM		 5203 nfs4_setup_sequence(d_data->res.server,
5204 &d_data->args.seq_args,
5205 &d_data->res.seq_res,
5206 task);
938e1010 5207}
938e1010 5208
c8d149f3 5209static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5210 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5211 .rpc_call_done = nfs4_delegreturn_done,
5212 .rpc_release = nfs4_delegreturn_release,
5213};
5214
e6f81075 5215static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5216{
5217 struct nfs4_delegreturndata *data;
fa178f29 5218 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5219 struct rpc_task *task;
5138fde0
TM		 5220 struct rpc_message msg = {
5221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5222 .rpc_cred = cred,
5223 };
c970aa85
TM		 5224 struct rpc_task_setup task_setup_data = {
5225 .rpc_client = server->client,
5138fde0 5226 .rpc_message = &msg,
c970aa85
TM		 5227 .callback_ops = &nfs4_delegreturn_ops,
5228 .flags = RPC_TASK_ASYNC,
5229 };
e6f81075 5230 int status = 0;
fe650407 5231
8535b2be 5232 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5233 if (data == NULL)
5234 return -ENOMEM;
a9c92d6b 5235 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5236 data->args.fhandle = &data->fh;
5237 data->args.stateid = &data->stateid;
9e907fec 5238 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5239 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5240 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5241 data->res.fattr = &data->fattr;
5242 data->res.server = server;
5138fde0 5243 nfs_fattr_init(data->res.fattr);
26e976a8 5244 data->timestamp = jiffies;
fe650407 5245 data->rpc_status = 0;
ea7c38fe
TM		 5246 data->inode = nfs_igrab_and_active(inode);
5247 if (data->inode)
5248 data->roc = nfs4_roc(inode);
fe650407 5249
c970aa85 5250 task_setup_data.callback_data = data;
1174dd1f
TM		 5251 msg.rpc_argp = &data->args;
5252 msg.rpc_resp = &data->res;
c970aa85 5253 task = rpc_run_task(&task_setup_data);
7a1218a2 5254 if (IS_ERR(task))
fe650407 5255 return PTR_ERR(task);
e6f81075
TM		 5256 if (!issync)
5257 goto out;
fe650407 5258 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5259 if (status != 0)
5260 goto out;
5261 status = data->rpc_status;
e144cbcc
TM		 5262 if (status == 0)
5263 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5264 else
5265 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5266out:
e6b3c4db 5267 rpc_put_task(task);
fe650407 5268 return status;
1da177e4
LT		 5269}
5270
e6f81075 5271int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5272{
5273 struct nfs_server *server = NFS_SERVER(inode);
5274 struct nfs4_exception exception = { };
5275 int err;
5276 do {
e6f81075 5277 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5278 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5279 switch (err) {
5280 case -NFS4ERR_STALE_STATEID:
5281 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5282 case 0:
5283 return 0;
5284 }
5285 err = nfs4_handle_exception(server, err, &exception);
5286 } while (exception.retry);
5287 return err;
5288}
5289
5290#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5291#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5292
5293/*
5294 * sleep, with exponential backoff, and retry the LOCK operation.
5295 */
5296static unsigned long
5297nfs4_set_lock_task_retry(unsigned long timeout)
5298{
416ad3c9 5299 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5300 timeout <<= 1;
5301 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5302 return NFS4_LOCK_MAXTIMEOUT;
5303 return timeout;
5304}
5305
1da177e4
LT		 5306static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5307{
5308 struct inode *inode = state->inode;
5309 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5310 struct nfs_client *clp = server->nfs_client;
911d1aaf 5311 struct nfs_lockt_args arg = {
1da177e4 5312 .fh = NFS_FH(inode),
911d1aaf 5313 .fl = request,
1da177e4 5314 };
911d1aaf
TM		 5315 struct nfs_lockt_res res = {
5316 .denied = request,
1da177e4
LT		 5317 };
5318 struct rpc_message msg = {
5319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5320 .rpc_argp = &arg,
5321 .rpc_resp = &res,
5322 .rpc_cred = state->owner->so_cred,
5323 };
1da177e4
LT		 5324 struct nfs4_lock_state *lsp;
5325 int status;
5326
911d1aaf 5327 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5328 status = nfs4_set_lock_state(state, request);
5329 if (status != 0)
5330 goto out;
5331 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5332 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5333 arg.lock_owner.s_dev = server->s_dev;
7c513058 5334 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5335 switch (status) {
5336 case 0:
5337 request->fl_type = F_UNLCK;
5338 break;
5339 case -NFS4ERR_DENIED:
5340 status = 0;
1da177e4 5341 }
70cc6487 5342 request->fl_ops->fl_release_private(request);
a6f951dd 5343 request->fl_ops = NULL;
8d0a8a9d 5344out:
1da177e4
LT		 5345 return status;
5346}
5347
5348static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5349{
5350 struct nfs4_exception exception = { };
5351 int err;
5352
5353 do {
d1b748a5
TM		 5354 err = _nfs4_proc_getlk(state, cmd, request);
5355 trace_nfs4_get_lock(request, state, cmd, err);
5356 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5357 &exception);
5358 } while (exception.retry);
5359 return err;
5360}
5361
5362static int do_vfs_lock(struct file *file, struct file_lock *fl)
5363{
5364 int res = 0;
5365 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5366 case FL_POSIX:
5367 res = posix_lock_file_wait(file, fl);
5368 break;
5369 case FL_FLOCK:
5370 res = flock_lock_file_wait(file, fl);
5371 break;
5372 default:
5373 BUG();
5374 }
1da177e4
LT		 5375 return res;
5376}
5377
faf5f49c 5378struct nfs4_unlockdata {
911d1aaf
TM		 5379 struct nfs_locku_args arg;
5380 struct nfs_locku_res res;
faf5f49c
TM		 5381 struct nfs4_lock_state *lsp;
5382 struct nfs_open_context *ctx;
911d1aaf
TM		 5383 struct file_lock fl;
5384 const struct nfs_server *server;
26e976a8 5385 unsigned long timestamp;
faf5f49c
TM		 5386};
5387
911d1aaf
TM		 5388static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5389 struct nfs_open_context *ctx,
5390 struct nfs4_lock_state *lsp,
5391 struct nfs_seqid *seqid)
5392{
5393 struct nfs4_unlockdata *p;
5394 struct inode *inode = lsp->ls_state->inode;
5395
8535b2be 5396 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5397 if (p == NULL)
5398 return NULL;
5399 p->arg.fh = NFS_FH(inode);
5400 p->arg.fl = &p->fl;
5401 p->arg.seqid = seqid;
c1d51931 5402 p->res.seqid = seqid;
911d1aaf
TM		 5403 p->lsp = lsp;
5404 atomic_inc(&lsp->ls_count);
5405 /* Ensure we don't close file until we're done freeing locks! */
5406 p->ctx = get_nfs_open_context(ctx);
5407 memcpy(&p->fl, fl, sizeof(p->fl));
5408 p->server = NFS_SERVER(inode);
5409 return p;
5410}
5411
06f814a3 5412static void nfs4_locku_release_calldata(void *data)
faf5f49c 5413{
963d8fe5 5414 struct nfs4_unlockdata *calldata = data;
911d1aaf 5415 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5416 nfs4_put_lock_state(calldata->lsp);
5417 put_nfs_open_context(calldata->ctx);
5418 kfree(calldata);
faf5f49c
TM		 5419}
5420
963d8fe5 5421static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5422{
963d8fe5 5423 struct nfs4_unlockdata *calldata = data;
faf5f49c 5424
14516c3a
TM		 5425 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5426 return;
faf5f49c
TM		 5427 switch (task->tk_status) {
5428 case 0:
26e976a8 5429 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5430 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5431 if (nfs4_update_lock_stateid(calldata->lsp,
5432 &calldata->res.stateid))
5433 break;
9e33bed5
TM		 5434 case -NFS4ERR_BAD_STATEID:
5435 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5436 case -NFS4ERR_STALE_STATEID:
5437 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5438 if (!nfs4_stateid_match(&calldata->arg.stateid,
5439 &calldata->lsp->ls_stateid))
5440 rpc_restart_call_prepare(task);
faf5f49c
TM		 5441 break;
5442 default:
8478eaa1
N		 5443 if (nfs4_async_handle_error(task, calldata->server,
5444 NULL, NULL) == -EAGAIN)
d00c5d43 5445 rpc_restart_call_prepare(task);
faf5f49c 5446 }
2b1bc308 5447 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5448}
5449
4ce70ada 5450static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5451{
4ce70ada 5452 struct nfs4_unlockdata *calldata = data;
faf5f49c 5453
911d1aaf 5454 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5455 goto out_wait;
425c1d4e 5456 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5457 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5458 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5459 goto out_no_action;
faf5f49c 5460 }
26e976a8 5461 calldata->timestamp = jiffies;
035168ab 5462 if (nfs4_setup_sequence(calldata->server,
a893693c 5463 &calldata->arg.seq_args,
2240a9e2
TM		 5464 &calldata->res.seq_res,
5465 task) != 0)
5466 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5467 return;
5468out_no_action:
5469 task->tk_action = NULL;
5470out_wait:
5471 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5472}
5473
963d8fe5 5474static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5475 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5476 .rpc_call_done = nfs4_locku_done,
06f814a3 5477 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5478};
5479
a5d16a4d
TM		 5480static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5481 struct nfs_open_context *ctx,
5482 struct nfs4_lock_state *lsp,
5483 struct nfs_seqid *seqid)
5484{
5485 struct nfs4_unlockdata *data;
5138fde0
TM		 5486 struct rpc_message msg = {
5487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5488 .rpc_cred = ctx->cred,
5489 };
c970aa85
TM		 5490 struct rpc_task_setup task_setup_data = {
5491 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5492 .rpc_message = &msg,
c970aa85 5493 .callback_ops = &nfs4_locku_ops,
101070ca 5494 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5495 .flags = RPC_TASK_ASYNC,
5496 };
a5d16a4d 5497
fa940720
WAA		 5498 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5499 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5500
137d6aca
FF		 5501 /* Ensure this is an unlock - when canceling a lock, the
5502 * canceled lock is passed in, and it won't be an unlock.
5503 */
5504 fl->fl_type = F_UNLCK;
5505
a5d16a4d
TM		 5506 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5507 if (data == NULL) {
5508 nfs_free_seqid(seqid);
5509 return ERR_PTR(-ENOMEM);
5510 }
5511
a9c92d6b 5512 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5513 msg.rpc_argp = &data->arg;
5514 msg.rpc_resp = &data->res;
c970aa85
TM		 5515 task_setup_data.callback_data = data;
5516 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5517}
5518
faf5f49c
TM		 5519static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5520{
65b62a29
TM		 5521 struct inode *inode = state->inode;
5522 struct nfs4_state_owner *sp = state->owner;
5523 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5524 struct nfs_seqid *seqid;
1da177e4 5525 struct nfs4_lock_state *lsp;
06f814a3 5526 struct rpc_task *task;
b4019c0e 5527 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5528 int status = 0;
536ff0f8 5529 unsigned char fl_flags = request->fl_flags;
faf5f49c 5530
8d0a8a9d 5531 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5532 /* Unlock _before_ we do the RPC call */
5533 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5534 /* Exclude nfs_delegation_claim_locks() */
5535 mutex_lock(&sp->so_delegreturn_mutex);
5536 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5537 down_read(&nfsi->rwsem);
5538 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5539 up_read(&nfsi->rwsem);
65b62a29 5540 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5541 goto out;
19e03c57
TM		 5542 }
5543 up_read(&nfsi->rwsem);
65b62a29 5544 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5545 if (status != 0)
9b073574
TM		 5546 goto out;
5547 /* Is this a delegated lock? */
8d0a8a9d 5548 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5549 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5550 goto out;
b4019c0e
TM		 5551 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5552 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5553 status = -ENOMEM;
badc76dd 5554 if (IS_ERR(seqid))
9b073574 5555 goto out;
cd3758e3 5556 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5557 status = PTR_ERR(task);
5558 if (IS_ERR(task))
9b073574 5559 goto out;
a5d16a4d 5560 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5561 rpc_put_task(task);
9b073574 5562out:
536ff0f8 5563 request->fl_flags = fl_flags;
d1b748a5 5564 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5565 return status;
5566}
5567
a5d16a4d
TM		 5568struct nfs4_lockdata {
5569 struct nfs_lock_args arg;
5570 struct nfs_lock_res res;
5571 struct nfs4_lock_state *lsp;
5572 struct nfs_open_context *ctx;
5573 struct file_lock fl;
26e976a8 5574 unsigned long timestamp;
a5d16a4d
TM		 5575 int rpc_status;
5576 int cancelled;
66179efe 5577 struct nfs_server *server;
a5d16a4d
TM		 5578};
5579
5580static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5581 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5582 gfp_t gfp_mask)
1da177e4 5583{
a5d16a4d
TM		 5584 struct nfs4_lockdata *p;
5585 struct inode *inode = lsp->ls_state->inode;
1da177e4 5586 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5587 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5588
8535b2be 5589 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5590 if (p == NULL)
5591 return NULL;
5592
5593 p->arg.fh = NFS_FH(inode);
5594 p->arg.fl = &p->fl;
8535b2be 5595 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5596 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5597 goto out_free;
b4019c0e
TM		 5598 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5599 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5600 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5601 goto out_free_seqid;
7539bbab 5602 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5603 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5604 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5605 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5606 p->lsp = lsp;
66179efe 5607 p->server = server;
a5d16a4d
TM		 5608 atomic_inc(&lsp->ls_count);
5609 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5610 get_file(fl->fl_file);
a5d16a4d
TM		 5611 memcpy(&p->fl, fl, sizeof(p->fl));
5612 return p;
2f74c0a0
TM		 5613out_free_seqid:
5614 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5615out_free:
5616 kfree(p);
5617 return NULL;
5618}
5619
5620static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5621{
5622 struct nfs4_lockdata *data = calldata;
5623 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5624
3110ff80 5625 dprintk("%s: begin!\n", __func__);
2f74c0a0 5626 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5627 goto out_wait;
a5d16a4d 5628 /* Do we need to do an open_to_lock_owner? */
6b447539 5629 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5630 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5631 goto out_release_lock_seqid;
8fe72bac 5632 }
425c1d4e
TM		 5633 nfs4_stateid_copy(&data->arg.open_stateid,
5634 &state->open_stateid);
a5d16a4d 5635 data->arg.new_lock_owner = 1;
c1d51931 5636 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5637 } else {
2f74c0a0 5638 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5639 nfs4_stateid_copy(&data->arg.lock_stateid,
5640 &data->lsp->ls_stateid);
5641 }
5d422301
TM		 5642 if (!nfs4_valid_open_stateid(state)) {
5643 data->rpc_status = -EBADF;
5644 task->tk_action = NULL;
5645 goto out_release_open_seqid;
5646 }
26e976a8 5647 data->timestamp = jiffies;
035168ab
TM		 5648 if (nfs4_setup_sequence(data->server,
5649 &data->arg.seq_args,
2240a9e2 5650 &data->res.seq_res,
d9afbd1b 5651 task) == 0)
66179efe 5652 return;
5d422301 5653out_release_open_seqid:
2240a9e2
TM		 5654 nfs_release_seqid(data->arg.open_seqid);
5655out_release_lock_seqid:
5656 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5657out_wait:
5658 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5659 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5660}
5661
a5d16a4d
TM		 5662static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5663{
5664 struct nfs4_lockdata *data = calldata;
39071e6f 5665 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5666
3110ff80 5667 dprintk("%s: begin!\n", __func__);
a5d16a4d 5668
14516c3a
TM		 5669 if (!nfs4_sequence_done(task, &data->res.seq_res))
5670 return;
66179efe 5671
a5d16a4d 5672 data->rpc_status = task->tk_status;
425c1d4e
TM		 5673 switch (task->tk_status) {
5674 case 0:
2b0143b5 5675 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5676 data->timestamp);
c69899a1
TM		 5677 if (data->arg.new_lock) {
5678 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5679 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5680 rpc_restart_call_prepare(task);
5681 break;
5682 }
5683 }
39071e6f
TM		 5684 if (data->arg.new_lock_owner != 0) {
5685 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5686 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5687 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5688 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5689 rpc_restart_call_prepare(task);
425c1d4e
TM		 5690 break;
5691 case -NFS4ERR_BAD_STATEID:
5692 case -NFS4ERR_OLD_STATEID:
5693 case -NFS4ERR_STALE_STATEID:
5694 case -NFS4ERR_EXPIRED:
5695 if (data->arg.new_lock_owner != 0) {
5696 if (!nfs4_stateid_match(&data->arg.open_stateid,
5697 &lsp->ls_state->open_stateid))
5698 rpc_restart_call_prepare(task);
5699 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5700 &lsp->ls_stateid))
5701 rpc_restart_call_prepare(task);
a5d16a4d 5702 }
3110ff80 5703 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5704}
5705
5706static void nfs4_lock_release(void *calldata)
5707{
5708 struct nfs4_lockdata *data = calldata;
5709
3110ff80 5710 dprintk("%s: begin!\n", __func__);
2f74c0a0 5711 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5712 if (data->cancelled != 0) {
5713 struct rpc_task *task;
5714 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5715 data->arg.lock_seqid);
5716 if (!IS_ERR(task))
bf294b41 5717 rpc_put_task_async(task);
3110ff80 5718 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5719 } else
5720 nfs_free_seqid(data->arg.lock_seqid);
5721 nfs4_put_lock_state(data->lsp);
5722 put_nfs_open_context(data->ctx);
feaff8e5 5723 fput(data->fl.fl_file);
a5d16a4d 5724 kfree(data);
3110ff80 5725 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5726}
5727
5728static const struct rpc_call_ops nfs4_lock_ops = {
5729 .rpc_call_prepare = nfs4_lock_prepare,
5730 .rpc_call_done = nfs4_lock_done,
5731 .rpc_release = nfs4_lock_release,
5732};
5733
2bee72a6
TM		 5734static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5735{
2bee72a6
TM		 5736 switch (error) {
5737 case -NFS4ERR_ADMIN_REVOKED:
5738 case -NFS4ERR_BAD_STATEID:
ecac799a 5739 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5740 if (new_lock_owner != 0 ||
795a88c9 5741 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5742 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5743 break;
5744 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5745 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5746 case -NFS4ERR_EXPIRED:
5747 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5748 };
5749}
5750
afe6c27c 5751static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5752{
5753 struct nfs4_lockdata *data;
5754 struct rpc_task *task;
5138fde0
TM		 5755 struct rpc_message msg = {
5756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5757 .rpc_cred = state->owner->so_cred,
5758 };
c970aa85
TM		 5759 struct rpc_task_setup task_setup_data = {
5760 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5761 .rpc_message = &msg,
c970aa85 5762 .callback_ops = &nfs4_lock_ops,
101070ca 5763 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5764 .flags = RPC_TASK_ASYNC,
5765 };
a5d16a4d
TM		 5766 int ret;
5767
3110ff80 5768 dprintk("%s: begin!\n", __func__);
cd3758e3 5769 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5770 fl->fl_u.nfs4_fl.owner,
5771 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5772 if (data == NULL)
5773 return -ENOMEM;
5774 if (IS_SETLKW(cmd))
5775 data->arg.block = 1;
a9c92d6b 5776 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5777 msg.rpc_argp = &data->arg;
5778 msg.rpc_resp = &data->res;
c970aa85 5779 task_setup_data.callback_data = data;
8fe72bac
TM		 5780 if (recovery_type > NFS_LOCK_NEW) {
5781 if (recovery_type == NFS_LOCK_RECLAIM)
5782 data->arg.reclaim = NFS_LOCK_RECLAIM;
5783 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5784 } else
5785 data->arg.new_lock = 1;
c970aa85 5786 task = rpc_run_task(&task_setup_data);
7a1218a2 5787 if (IS_ERR(task))
a5d16a4d 5788 return PTR_ERR(task);
a5d16a4d
TM		 5789 ret = nfs4_wait_for_completion_rpc_task(task);
5790 if (ret == 0) {
5791 ret = data->rpc_status;
2bee72a6
TM		 5792 if (ret)
5793 nfs4_handle_setlk_error(data->server, data->lsp,
5794 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5795 } else
5796 data->cancelled = 1;
e6b3c4db 5797 rpc_put_task(task);
3110ff80 5798 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5799 return ret;
1da177e4
LT		 5800}
5801
5802static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5803{
202b50dc 5804 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5805 struct nfs4_exception exception = {
5806 .inode = state->inode,
5807 };
202b50dc
TM		 5808 int err;
5809
5810 do {
42a2d13e
TM		 5811 /* Cache the lock if possible... */
5812 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5813 return 0;
afe6c27c 5814 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5815 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5816 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5817 break;
5818 nfs4_handle_exception(server, err, &exception);
5819 } while (exception.retry);
5820 return err;
1da177e4
LT		 5821}
5822
5823static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5824{
202b50dc 5825 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5826 struct nfs4_exception exception = {
5827 .inode = state->inode,
5828 };
202b50dc
TM		 5829 int err;
5830
6bfc93ef
TM		 5831 err = nfs4_set_lock_state(state, request);
5832 if (err != 0)
5833 return err;
f6de7a39 5834 if (!recover_lost_locks) {
ef1820f9
N		 5835 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5836 return 0;
5837 }
202b50dc 5838 do {
42a2d13e
TM		 5839 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5840 return 0;
afe6c27c 5841 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5842 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5843 switch (err) {
5844 default:
5845 goto out;
5846 case -NFS4ERR_GRACE:
5847 case -NFS4ERR_DELAY:
5848 nfs4_handle_exception(server, err, &exception);
5849 err = 0;
5850 }
202b50dc 5851 } while (exception.retry);
a9ed2e25 5852out:
202b50dc 5853 return err;
1da177e4
LT		 5854}
5855
f062eb6c 5856#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5857/**
5858 * nfs41_check_expired_locks - possibly free a lock stateid
5859 *
5860 * @state: NFSv4 state for an inode
5861 *
5862 * Returns NFS_OK if recovery for this stateid is now finished.
5863 * Otherwise a negative NFS4ERR value is returned.
5864 */
b01dd1d8 5865static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5866{
eb64cf96 5867 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5868 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5869 struct nfs_server *server = NFS_SERVER(state->inode);
5870
b01dd1d8 5871 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5872 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5873 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5874
5875 status = nfs41_test_stateid(server,
5876 &lsp->ls_stateid,
5877 cred);
08cb47fa 5878 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5879 if (status != NFS_OK) {
3e60ffdd
CL		 5880 /* Free the stateid unless the server
5881 * informs us the stateid is unrecognized. */
89af2739
CL		 5882 if (status != -NFS4ERR_BAD_STATEID)
5883 nfs41_free_stateid(server,
ab7cb0df
TM		 5884 &lsp->ls_stateid,
5885 cred);
795a88c9 5886 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5887 ret = status;
5888 }
5889 }
5890 };
5891
5892 return ret;
5893}
5894
5895static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5896{
5897 int status = NFS_OK;
5898
5899 if (test_bit(LK_STATE_IN_USE, &state->flags))
5900 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5901 if (status != NFS_OK)
5902 status = nfs4_lock_expired(state, request);
5903 return status;
f062eb6c
BS		 5904}
5905#endif
5906
1da177e4
LT		 5907static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5908{
19e03c57 5909 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5910 unsigned char fl_flags = request->fl_flags;
8e469ebd 5911 int status = -ENOLCK;
1da177e4 5912
8e469ebd
TM		 5913 if ((fl_flags & FL_POSIX) &&
5914 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5915 goto out;
6bfc93ef 5916 /* Is this a delegated open? */
6bfc93ef
TM		 5917 status = nfs4_set_lock_state(state, request);
5918 if (status != 0)
5919 goto out;
01c3b861
TM		 5920 request->fl_flags |= FL_ACCESS;
5921 status = do_vfs_lock(request->fl_file, request);
5922 if (status < 0)
5923 goto out;
19e03c57 5924 down_read(&nfsi->rwsem);
01c3b861 5925 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5926 /* Yes: cache locks! */
01c3b861 5927 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5928 request->fl_flags = fl_flags & ~FL_SLEEP;
5929 status = do_vfs_lock(request->fl_file, request);
c69899a1 5930 up_read(&nfsi->rwsem);
9a99af49 5931 goto out;
9a99af49 5932 }
19e03c57 5933 up_read(&nfsi->rwsem);
c69899a1 5934 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 5935out:
5936 request->fl_flags = fl_flags;
1da177e4
LT		 5937 return status;
5938}
5939
5940static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5941{
a1d0b5ee
TM		 5942 struct nfs4_exception exception = {
5943 .state = state,
05ffe24f 5944 .inode = state->inode,
a1d0b5ee 5945 };
1da177e4
LT		 5946 int err;
5947
5948 do {
965b5d67 5949 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5950 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5951 if (err == -NFS4ERR_DENIED)
5952 err = -EAGAIN;
1da177e4 5953 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5954 err, &exception);
1da177e4
LT		 5955 } while (exception.retry);
5956 return err;
5957}
5958
5959static int
5960nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5961{
5962 struct nfs_open_context *ctx;
5963 struct nfs4_state *state;
5964 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5965 int status;
5966
5967 /* verify open state */
cd3758e3 5968 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5969 state = ctx->state;
5970
5971 if (request->fl_start < 0 || request->fl_end < 0)
5972 return -EINVAL;
5973
d953126a
TM		 5974 if (IS_GETLK(cmd)) {
5975 if (state != NULL)
5976 return nfs4_proc_getlk(state, F_GETLK, request);
5977 return 0;
5978 }
1da177e4
LT		 5979
5980 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5981 return -EINVAL;
5982
d953126a
TM		 5983 if (request->fl_type == F_UNLCK) {
5984 if (state != NULL)
5985 return nfs4_proc_unlck(state, cmd, request);
5986 return 0;
5987 }
1da177e4 5988
d953126a
TM		 5989 if (state == NULL)
5990 return -ENOLCK;
55725513
TM		 5991 /*
5992 * Don't rely on the VFS having checked the file open mode,
5993 * since it won't do this for flock() locks.
5994 */
f44106e2 5995 switch (request->fl_type) {
55725513
TM		 5996 case F_RDLCK:
5997 if (!(filp->f_mode & FMODE_READ))
5998 return -EBADF;
5999 break;
6000 case F_WRLCK:
6001 if (!(filp->f_mode & FMODE_WRITE))
6002 return -EBADF;
6003 }
6004
1da177e4
LT		 6005 do {
6006 status = nfs4_proc_setlk(state, cmd, request);
6007 if ((status != -EAGAIN) || IS_SETLK(cmd))
6008 break;
6009 timeout = nfs4_set_lock_task_retry(timeout);
6010 status = -ERESTARTSYS;
6011 if (signalled())
6012 break;
6013 } while(status < 0);
1da177e4
LT		 6014 return status;
6015}
6016
db4f2e63 6017int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6018{
6019 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6020 int err;
6021
6022 err = nfs4_set_lock_state(state, fl);
6023 if (err != 0)
db4f2e63 6024 return err;
4a706fa0 6025 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6026 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6027}
6b3b5496 6028
cf470c3e
TM		 6029struct nfs_release_lockowner_data {
6030 struct nfs4_lock_state *lsp;
5ae67c4f 6031 struct nfs_server *server;
cf470c3e 6032 struct nfs_release_lockowner_args args;
b7e63a10 6033 struct nfs_release_lockowner_res res;
60ea6812 6034 unsigned long timestamp;
cf470c3e
TM		 6035};
6036
fbd4bfd1
CL		 6037static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6038{
6039 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6040 struct nfs_server *server = data->server;
cb04ad2a
PT		 6041 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6042 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6043 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6044 data->timestamp = jiffies;
fbd4bfd1
CL		 6045}
6046
6047static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6048{
6049 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6050 struct nfs_server *server = data->server;
6051
b7e63a10 6052 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6053
6054 switch (task->tk_status) {
6055 case 0:
6056 renew_lease(server, data->timestamp);
6057 break;
6058 case -NFS4ERR_STALE_CLIENTID:
6059 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6060 nfs4_schedule_lease_recovery(server->nfs_client);
6061 break;
60ea6812
CL		 6062 case -NFS4ERR_LEASE_MOVED:
6063 case -NFS4ERR_DELAY:
8478eaa1
N		 6064 if (nfs4_async_handle_error(task, server,
6065 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6066 rpc_restart_call_prepare(task);
6067 }
fbd4bfd1
CL		 6068}
6069
d3c7b7cc
TM		 6070static void nfs4_release_lockowner_release(void *calldata)
6071{
cf470c3e 6072 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6073 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6074 kfree(calldata);
6075}
6076
17280175 6077static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6078 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6079 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6080 .rpc_release = nfs4_release_lockowner_release,
6081};
6082
f1cdae87
JL		 6083static void
6084nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6085{
cf470c3e 6086 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6087 struct rpc_message msg = {
6088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6089 };
6090
6091 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6092 return;
fbd4bfd1 6093
cf470c3e
TM		 6094 data = kmalloc(sizeof(*data), GFP_NOFS);
6095 if (!data)
f1cdae87 6096 return;
cf470c3e 6097 data->lsp = lsp;
5ae67c4f 6098 data->server = server;
cf470c3e
TM		 6099 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6100 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6101 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6102
cf470c3e 6103 msg.rpc_argp = &data->args;
b7e63a10
TM		 6104 msg.rpc_resp = &data->res;
6105 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6106 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6107}
6108
aa1870af
BF		 6109#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6110
64c2ce8b
AK		 6111static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6112 const void *buf, size_t buflen,
6113 int flags, int type)
6b3b5496 6114{
64c2ce8b
AK		 6115 if (strcmp(key, "") != 0)
6116 return -EINVAL;
4b580ee3 6117
2b0143b5 6118 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6119}
6120
64c2ce8b
AK		 6121static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6122 void *buf, size_t buflen, int type)
6b3b5496 6123{
64c2ce8b
AK		 6124 if (strcmp(key, "") != 0)
6125 return -EINVAL;
aa1870af 6126
2b0143b5 6127 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6128}
6129
64c2ce8b
AK		 6130static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6131 size_t list_len, const char *name,
6132 size_t name_len, int type)
6b3b5496 6133{
64c2ce8b 6134 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6135
2b0143b5 6136 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6137 return 0;
64c2ce8b
AK		 6138
6139 if (list && len <= list_len)
6140 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6141 return len;
6b3b5496
BF		 6142}
6143
c9bccef6
DQ		 6144#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6145static inline int nfs4_server_supports_labels(struct nfs_server *server)
6146{
6147 return server->caps & NFS_CAP_SECURITY_LABEL;
6148}
6149
6150static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6151 const void *buf, size_t buflen,
6152 int flags, int type)
6153{
6154 if (security_ismaclabel(key))
6155 return nfs4_set_security_label(dentry, buf, buflen);
6156
6157 return -EOPNOTSUPP;
6158}
6159
6160static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6161 void *buf, size_t buflen, int type)
6162{
6163 if (security_ismaclabel(key))
2b0143b5 6164 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6165 return -EOPNOTSUPP;
6166}
6167
6168static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6169 size_t list_len, const char *name,
6170 size_t name_len, int type)
6171{
6172 size_t len = 0;
6173
2b0143b5
DH		 6174 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6175 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6176 if (list && len <= list_len)
2b0143b5 6177 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6178 }
6179 return len;
6180}
6181
6182static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6183 .prefix = XATTR_SECURITY_PREFIX,
6184 .list = nfs4_xattr_list_nfs4_label,
6185 .get = nfs4_xattr_get_nfs4_label,
6186 .set = nfs4_xattr_set_nfs4_label,
6187};
6188#endif
6189
6190
533eb461
AA		 6191/*
6192 * nfs_fhget will use either the mounted_on_fileid or the fileid
6193 */
69aaaae1
TM		 6194static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6195{
533eb461
AA		 6196 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6197 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6198 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6199 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6200 return;
6201
6202 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6203 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6204 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6205 fattr->nlink = 2;
6206}
6207
f05d147f
BS		 6208static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6209 const struct qstr *name,
6210 struct nfs4_fs_locations *fs_locations,
6211 struct page *page)
683b57b4
TM		 6212{
6213 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6214 u32 bitmask[3] = {
361e624f 6215 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6216 };
6217 struct nfs4_fs_locations_arg args = {
6218 .dir_fh = NFS_FH(dir),
c228fd3a 6219 .name = name,
683b57b4
TM		 6220 .page = page,
6221 .bitmask = bitmask,
6222 };
22958463
BH		 6223 struct nfs4_fs_locations_res res = {
6224 .fs_locations = fs_locations,
6225 };
683b57b4
TM		 6226 struct rpc_message msg = {
6227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6228 .rpc_argp = &args,
22958463 6229 .rpc_resp = &res,
683b57b4
TM		 6230 };
6231 int status;
6232
3110ff80 6233 dprintk("%s: start\n", __func__);
533eb461
AA		 6234
6235 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6236 * is not supported */
6237 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6238 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6239 else
6240 bitmask[0] |= FATTR4_WORD0_FILEID;
6241
c228fd3a 6242 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6243 fs_locations->server = server;
830b8e33 6244 fs_locations->nlocations = 0;
f05d147f 6245 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6246 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6247 return status;
6248}
6249
f05d147f
BS		 6250int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6251 const struct qstr *name,
6252 struct nfs4_fs_locations *fs_locations,
6253 struct page *page)
db0a9593
BS		 6254{
6255 struct nfs4_exception exception = { };
6256 int err;
6257 do {
078ea3df
TM		 6258 err = _nfs4_proc_fs_locations(client, dir, name,
6259 fs_locations, page);
6260 trace_nfs4_get_fs_locations(dir, name, err);
6261 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6262 &exception);
6263 } while (exception.retry);
6264 return err;
6265}
6266
b03d735b
CL		 6267/*
6268 * This operation also signals the server that this client is
6269 * performing migration recovery. The server can stop returning
6270 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6271 * appended to this compound to identify the client ID which is
6272 * performing recovery.
6273 */
6274static int _nfs40_proc_get_locations(struct inode *inode,
6275 struct nfs4_fs_locations *locations,
6276 struct page *page, struct rpc_cred *cred)
6277{
6278 struct nfs_server *server = NFS_SERVER(inode);
6279 struct rpc_clnt *clnt = server->client;
6280 u32 bitmask[2] = {
6281 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6282 };
6283 struct nfs4_fs_locations_arg args = {
6284 .clientid = server->nfs_client->cl_clientid,
6285 .fh = NFS_FH(inode),
6286 .page = page,
6287 .bitmask = bitmask,
6288 .migration = 1, /* skip LOOKUP */
6289 .renew = 1, /* append RENEW */
6290 };
6291 struct nfs4_fs_locations_res res = {
6292 .fs_locations = locations,
6293 .migration = 1,
6294 .renew = 1,
6295 };
6296 struct rpc_message msg = {
6297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6298 .rpc_argp = &args,
6299 .rpc_resp = &res,
6300 .rpc_cred = cred,
6301 };
6302 unsigned long now = jiffies;
6303 int status;
6304
6305 nfs_fattr_init(&locations->fattr);
6306 locations->server = server;
6307 locations->nlocations = 0;
6308
6309 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6310 nfs4_set_sequence_privileged(&args.seq_args);
6311 status = nfs4_call_sync_sequence(clnt, server, &msg,
6312 &args.seq_args, &res.seq_res);
6313 if (status)
6314 return status;
6315
6316 renew_lease(server, now);
6317 return 0;
6318}
6319
6320#ifdef CONFIG_NFS_V4_1
6321
6322/*
6323 * This operation also signals the server that this client is
6324 * performing migration recovery. The server can stop asserting
6325 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6326 * performing this operation is identified in the SEQUENCE
6327 * operation in this compound.
6328 *
6329 * When the client supports GETATTR(fs_locations_info), it can
6330 * be plumbed in here.
6331 */
6332static int _nfs41_proc_get_locations(struct inode *inode,
6333 struct nfs4_fs_locations *locations,
6334 struct page *page, struct rpc_cred *cred)
6335{
6336 struct nfs_server *server = NFS_SERVER(inode);
6337 struct rpc_clnt *clnt = server->client;
6338 u32 bitmask[2] = {
6339 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6340 };
6341 struct nfs4_fs_locations_arg args = {
6342 .fh = NFS_FH(inode),
6343 .page = page,
6344 .bitmask = bitmask,
6345 .migration = 1, /* skip LOOKUP */
6346 };
6347 struct nfs4_fs_locations_res res = {
6348 .fs_locations = locations,
6349 .migration = 1,
6350 };
6351 struct rpc_message msg = {
6352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6353 .rpc_argp = &args,
6354 .rpc_resp = &res,
6355 .rpc_cred = cred,
6356 };
6357 int status;
6358
6359 nfs_fattr_init(&locations->fattr);
6360 locations->server = server;
6361 locations->nlocations = 0;
6362
6363 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6364 nfs4_set_sequence_privileged(&args.seq_args);
6365 status = nfs4_call_sync_sequence(clnt, server, &msg,
6366 &args.seq_args, &res.seq_res);
6367 if (status == NFS4_OK &&
6368 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6369 status = -NFS4ERR_LEASE_MOVED;
6370 return status;
6371}
6372
6373#endif /* CONFIG_NFS_V4_1 */
6374
6375/**
6376 * nfs4_proc_get_locations - discover locations for a migrated FSID
6377 * @inode: inode on FSID that is migrating
6378 * @locations: result of query
6379 * @page: buffer
6380 * @cred: credential to use for this operation
6381 *
6382 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6383 * operation failed, or a negative errno if a local error occurred.
6384 *
6385 * On success, "locations" is filled in, but if the server has
6386 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6387 * asserted.
6388 *
6389 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6390 * from this client that require migration recovery.
6391 */
6392int nfs4_proc_get_locations(struct inode *inode,
6393 struct nfs4_fs_locations *locations,
6394 struct page *page, struct rpc_cred *cred)
6395{
6396 struct nfs_server *server = NFS_SERVER(inode);
6397 struct nfs_client *clp = server->nfs_client;
6398 const struct nfs4_mig_recovery_ops *ops =
6399 clp->cl_mvops->mig_recovery_ops;
6400 struct nfs4_exception exception = { };
6401 int status;
6402
6403 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6404 (unsigned long long)server->fsid.major,
6405 (unsigned long long)server->fsid.minor,
6406 clp->cl_hostname);
6407 nfs_display_fhandle(NFS_FH(inode), __func__);
6408
6409 do {
6410 status = ops->get_locations(inode, locations, page, cred);
6411 if (status != -NFS4ERR_DELAY)
6412 break;
6413 nfs4_handle_exception(server, status, &exception);
6414 } while (exception.retry);
6415 return status;
6416}
6417
44c99933
CL		 6418/*
6419 * This operation also signals the server that this client is
6420 * performing "lease moved" recovery. The server can stop
6421 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6422 * is appended to this compound to identify the client ID which is
6423 * performing recovery.
6424 */
6425static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6426{
6427 struct nfs_server *server = NFS_SERVER(inode);
6428 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6429 struct rpc_clnt *clnt = server->client;
6430 struct nfs4_fsid_present_arg args = {
6431 .fh = NFS_FH(inode),
6432 .clientid = clp->cl_clientid,
6433 .renew = 1, /* append RENEW */
6434 };
6435 struct nfs4_fsid_present_res res = {
6436 .renew = 1,
6437 };
6438 struct rpc_message msg = {
6439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6440 .rpc_argp = &args,
6441 .rpc_resp = &res,
6442 .rpc_cred = cred,
6443 };
6444 unsigned long now = jiffies;
6445 int status;
6446
6447 res.fh = nfs_alloc_fhandle();
6448 if (res.fh == NULL)
6449 return -ENOMEM;
6450
6451 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6452 nfs4_set_sequence_privileged(&args.seq_args);
6453 status = nfs4_call_sync_sequence(clnt, server, &msg,
6454 &args.seq_args, &res.seq_res);
6455 nfs_free_fhandle(res.fh);
6456 if (status)
6457 return status;
6458
6459 do_renew_lease(clp, now);
6460 return 0;
6461}
6462
6463#ifdef CONFIG_NFS_V4_1
6464
6465/*
6466 * This operation also signals the server that this client is
6467 * performing "lease moved" recovery. The server can stop asserting
6468 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6469 * this operation is identified in the SEQUENCE operation in this
6470 * compound.
6471 */
6472static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6473{
6474 struct nfs_server *server = NFS_SERVER(inode);
6475 struct rpc_clnt *clnt = server->client;
6476 struct nfs4_fsid_present_arg args = {
6477 .fh = NFS_FH(inode),
6478 };
6479 struct nfs4_fsid_present_res res = {
6480 };
6481 struct rpc_message msg = {
6482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6483 .rpc_argp = &args,
6484 .rpc_resp = &res,
6485 .rpc_cred = cred,
6486 };
6487 int status;
6488
6489 res.fh = nfs_alloc_fhandle();
6490 if (res.fh == NULL)
6491 return -ENOMEM;
6492
6493 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6494 nfs4_set_sequence_privileged(&args.seq_args);
6495 status = nfs4_call_sync_sequence(clnt, server, &msg,
6496 &args.seq_args, &res.seq_res);
6497 nfs_free_fhandle(res.fh);
6498 if (status == NFS4_OK &&
6499 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6500 status = -NFS4ERR_LEASE_MOVED;
6501 return status;
6502}
6503
6504#endif /* CONFIG_NFS_V4_1 */
6505
6506/**
6507 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6508 * @inode: inode on FSID to check
6509 * @cred: credential to use for this operation
6510 *
6511 * Server indicates whether the FSID is present, moved, or not
6512 * recognized. This operation is necessary to clear a LEASE_MOVED
6513 * condition for this client ID.
6514 *
6515 * Returns NFS4_OK if the FSID is present on this server,
6516 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6517 * NFS4ERR code if some error occurred on the server, or a
6518 * negative errno if a local failure occurred.
6519 */
6520int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6521{
6522 struct nfs_server *server = NFS_SERVER(inode);
6523 struct nfs_client *clp = server->nfs_client;
6524 const struct nfs4_mig_recovery_ops *ops =
6525 clp->cl_mvops->mig_recovery_ops;
6526 struct nfs4_exception exception = { };
6527 int status;
6528
6529 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6530 (unsigned long long)server->fsid.major,
6531 (unsigned long long)server->fsid.minor,
6532 clp->cl_hostname);
6533 nfs_display_fhandle(NFS_FH(inode), __func__);
6534
6535 do {
6536 status = ops->fsid_present(inode, cred);
6537 if (status != -NFS4ERR_DELAY)
6538 break;
6539 nfs4_handle_exception(server, status, &exception);
6540 } while (exception.retry);
6541 return status;
6542}
6543
5ec16a85 6544/**
a5250def
WAA		 6545 * If 'use_integrity' is true and the state managment nfs_client
6546 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6547 * and the machine credential as per RFC3530bis and RFC5661 Security
6548 * Considerations sections. Otherwise, just use the user cred with the
6549 * filesystem's rpc_client.
5ec16a85 6550 */
a5250def 6551static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6552{
6553 int status;
6554 struct nfs4_secinfo_arg args = {
6555 .dir_fh = NFS_FH(dir),
6556 .name = name,
6557 };
6558 struct nfs4_secinfo_res res = {
6559 .flavors = flavors,
6560 };
6561 struct rpc_message msg = {
6562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6563 .rpc_argp = &args,
6564 .rpc_resp = &res,
6565 };
a5250def 6566 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6567 struct rpc_cred *cred = NULL;
a5250def
WAA		 6568
6569 if (use_integrity) {
6570 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6571 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6572 msg.rpc_cred = cred;
a5250def 6573 }
5a5ea0d4
BS		 6574
6575 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6576
6577 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6578 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6579
a5250def
WAA		 6580 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6581 &res.seq_res, 0);
5a5ea0d4 6582 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6583
7cb852df
WAA		 6584 if (cred)
6585 put_rpccred(cred);
a5250def 6586
5a5ea0d4
BS		 6587 return status;
6588}
6589
72de53ec
BS		 6590int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6591 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6592{
6593 struct nfs4_exception exception = { };
6594 int err;
6595 do {
a5250def
WAA		 6596 err = -NFS4ERR_WRONGSEC;
6597
6598 /* try to use integrity protection with machine cred */
6599 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6600 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6601
6602 /*
6603 * if unable to use integrity protection, or SECINFO with
6604 * integrity protection returns NFS4ERR_WRONGSEC (which is
6605 * disallowed by spec, but exists in deployed servers) use
6606 * the current filesystem's rpc_client and the user cred.
6607 */
6608 if (err == -NFS4ERR_WRONGSEC)
6609 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6610
078ea3df
TM		 6611 trace_nfs4_secinfo(dir, name, err);
6612 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6613 &exception);
6614 } while (exception.retry);
6615 return err;
6616}
6617
557134a3 6618#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6619/*
6620 * Check the exchange flags returned by the server for invalid flags, having
6621 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6622 * DS flags set.
6623 */
6624static int nfs4_check_cl_exchange_flags(u32 flags)
6625{
6626 if (flags & ~EXCHGID4_FLAG_MASK_R)
6627 goto out_inval;
6628 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6629 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6630 goto out_inval;
6631 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6632 goto out_inval;
6633 return NFS_OK;
6634out_inval:
6635 return -NFS4ERR_INVAL;
6636}
6637
78fe0f41 6638static bool
79d4e1f0
CL		 6639nfs41_same_server_scope(struct nfs41_server_scope *a,
6640 struct nfs41_server_scope *b)
78fe0f41
WAA		 6641{
6642 if (a->server_scope_sz == b->server_scope_sz &&
6643 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6644 return true;
6645
6646 return false;
6647}
6648
7c44f1ae
WAA		 6649/*
6650 * nfs4_proc_bind_conn_to_session()
6651 *
6652 * The 4.1 client currently uses the same TCP connection for the
6653 * fore and backchannel.
6654 */
2cf047c9 6655int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6656{
6657 int status;
71a097c6
TM		 6658 struct nfs41_bind_conn_to_session_args args = {
6659 .client = clp,
6660 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6661 };
7c44f1ae
WAA		 6662 struct nfs41_bind_conn_to_session_res res;
6663 struct rpc_message msg = {
6664 .rpc_proc =
6665 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6666 .rpc_argp = &args,
7c44f1ae 6667 .rpc_resp = &res,
2cf047c9 6668 .rpc_cred = cred,
7c44f1ae
WAA		 6669 };
6670
6671 dprintk("--> %s\n", __func__);
7c44f1ae 6672
71a097c6
TM		 6673 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6674 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6675 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6676
6677 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6678 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6679 if (status == 0) {
71a097c6 6680 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6681 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6682 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6683 status = -EIO;
71a097c6 6684 goto out;
7c44f1ae 6685 }
71a097c6 6686 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6687 dprintk("NFS: %s: Unexpected direction from server\n",
6688 __func__);
6689 status = -EIO;
71a097c6 6690 goto out;
7c44f1ae 6691 }
71a097c6 6692 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6693 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6694 __func__);
6695 status = -EIO;
71a097c6 6696 goto out;
7c44f1ae
WAA		 6697 }
6698 }
7c44f1ae
WAA		 6699out:
6700 dprintk("<-- %s status= %d\n", __func__, status);
6701 return status;
6702}
6703
99fe60d0 6704/*
fa940720
WAA		 6705 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6706 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6707 */
6708static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6709 .how = SP4_MACH_CRED,
6710 .enforce.u.words = {
6711 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6712 1 << (OP_EXCHANGE_ID - 32) |
6713 1 << (OP_CREATE_SESSION - 32) |
6714 1 << (OP_DESTROY_SESSION - 32) |
6715 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6716 },
6717 .allow.u.words = {
6718 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6719 1 << (OP_LOCKU) |
6720 1 << (OP_COMMIT),
8b5bee2e 6721 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6722 1 << (OP_SECINFO_NO_NAME - 32) |
6723 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6724 1 << (OP_FREE_STATEID - 32) |
6725 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6726 }
6727};
6728
6729/*
6730 * Select the state protection mode for client `clp' given the server results
6731 * from exchange_id in `sp'.
99fe60d0 6732 *
2031cd1a
WAA		 6733 * Returns 0 on success, negative errno otherwise.
6734 */
6735static int nfs4_sp4_select_mode(struct nfs_client *clp,
6736 struct nfs41_state_protection *sp)
6737{
6738 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6739 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6740 1 << (OP_EXCHANGE_ID - 32) |
6741 1 << (OP_CREATE_SESSION - 32) |
6742 1 << (OP_DESTROY_SESSION - 32) |
6743 1 << (OP_DESTROY_CLIENTID - 32)
6744 };
6745 unsigned int i;
6746
6747 if (sp->how == SP4_MACH_CRED) {
6748 /* Print state protect result */
6749 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6750 for (i = 0; i <= LAST_NFS4_OP; i++) {
6751 if (test_bit(i, sp->enforce.u.longs))
6752 dfprintk(MOUNT, " enforce op %d\n", i);
6753 if (test_bit(i, sp->allow.u.longs))
6754 dfprintk(MOUNT, " allow op %d\n", i);
6755 }
6756
6757 /* make sure nothing is on enforce list that isn't supported */
6758 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6759 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6760 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6761 return -EINVAL;
6762 }
6763 }
6764
6765 /*
6766 * Minimal mode - state operations are allowed to use machine
6767 * credential. Note this already happens by default, so the
6768 * client doesn't have to do anything more than the negotiation.
6769 *
6770 * NOTE: we don't care if EXCHANGE_ID is in the list -
6771 * we're already using the machine cred for exchange_id
6772 * and will never use a different cred.
6773 */
6774 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6775 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6776 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6777 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6778 dfprintk(MOUNT, "sp4_mach_cred:\n");
6779 dfprintk(MOUNT, " minimal mode enabled\n");
6780 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6781 } else {
6782 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6783 return -EINVAL;
6784 }
fa940720
WAA		 6785
6786 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6787 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6788 dfprintk(MOUNT, " cleanup mode enabled\n");
6789 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6790 }
8b5bee2e
WAA		 6791
6792 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6793 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6794 dfprintk(MOUNT, " secinfo mode enabled\n");
6795 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6796 }
3787d506
WAA		 6797
6798 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6799 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6800 dfprintk(MOUNT, " stateid mode enabled\n");
6801 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6802 }
8c21c62c
WAA		 6803
6804 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6805 dfprintk(MOUNT, " write mode enabled\n");
6806 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6807 }
6808
6809 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6810 dfprintk(MOUNT, " commit mode enabled\n");
6811 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6812 }
2031cd1a
WAA		 6813 }
6814
6815 return 0;
6816}
6817
6818/*
6819 * _nfs4_proc_exchange_id()
6bbb4ae8 6820 *
2031cd1a 6821 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6822 */
2031cd1a
WAA		 6823static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6824 u32 sp4_how)
99fe60d0
BH		 6825{
6826 nfs4_verifier verifier;
6827 struct nfs41_exchange_id_args args = {
cd93710e 6828 .verifier = &verifier,
99fe60d0 6829 .client = clp,
cd3fadec 6830#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6831 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6832 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6833 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6834#else
6835 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6836 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6837#endif
99fe60d0
BH		 6838 };
6839 struct nfs41_exchange_id_res res = {
32b01310 6840 0
99fe60d0
BH		 6841 };
6842 int status;
6843 struct rpc_message msg = {
6844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6845 .rpc_argp = &args,
6846 .rpc_resp = &res,
6847 .rpc_cred = cred,
6848 };
99fe60d0 6849
f092075d 6850 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6851 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6852 sizeof(args.id));
6bbb4ae8
CL		 6853 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6854 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6855 args.id_len, args.id);
99fe60d0 6856
acdeb69d 6857 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6858 GFP_NOFS);
acdeb69d 6859 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6860 status = -ENOMEM;
6861 goto out;
6862 }
78fe0f41 6863
79d4e1f0 6864 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6865 GFP_NOFS);
177313f1 6866 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6867 status = -ENOMEM;
acdeb69d 6868 goto out_server_owner;
abe9a6d5 6869 }
78fe0f41 6870
bbafffd2 6871 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6872 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6873 status = -ENOMEM;
6874 goto out_server_scope;
6875 }
6876
2031cd1a
WAA		 6877 switch (sp4_how) {
6878 case SP4_NONE:
6879 args.state_protect.how = SP4_NONE;
6880 break;
6881
6882 case SP4_MACH_CRED:
6883 args.state_protect = nfs4_sp4_mach_cred_request;
6884 break;
6885
6886 default:
6887 /* unsupported! */
6888 WARN_ON_ONCE(1);
6889 status = -EINVAL;
6890 goto out_server_scope;
6891 }
6892
1bd714f2 6893 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6894 trace_nfs4_exchange_id(clp, status);
177313f1 6895 if (status == 0)
32b01310 6896 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6897
2031cd1a
WAA		 6898 if (status == 0)
6899 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6900
acdeb69d 6901 if (status == 0) {
32b01310 6902 clp->cl_clientid = res.clientid;
e11259f9
TM		 6903 clp->cl_exchange_flags = res.flags;
6904 /* Client ID is not confirmed */
6905 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6906 clear_bit(NFS4_SESSION_ESTABLISHED,
6907 &clp->cl_session->session_state);
32b01310 6908 clp->cl_seqid = res.seqid;
e11259f9 6909 }
32b01310 6910
acdeb69d
CL		 6911 kfree(clp->cl_serverowner);
6912 clp->cl_serverowner = res.server_owner;
6913 res.server_owner = NULL;
78fe0f41 6914
7d2ed9ac 6915 /* use the most recent implementation id */
59155546
CL		 6916 kfree(clp->cl_implid);
6917 clp->cl_implid = res.impl_id;
7d2ed9ac 6918
177313f1 6919 if (clp->cl_serverscope != NULL &&
79d4e1f0 6920 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6921 res.server_scope)) {
6922 dprintk("%s: server_scope mismatch detected\n",
6923 __func__);
6924 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6925 kfree(clp->cl_serverscope);
6926 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6927 }
6928
177313f1 6929 if (clp->cl_serverscope == NULL) {
79d4e1f0 6930 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6931 goto out;
6932 }
32b01310
TM		 6933 } else
6934 kfree(res.impl_id);
7d2ed9ac 6935
acdeb69d
CL		 6936out_server_owner:
6937 kfree(res.server_owner);
7d2ed9ac 6938out_server_scope:
abe9a6d5
WAA		 6939 kfree(res.server_scope);
6940out:
177313f1 6941 if (clp->cl_implid != NULL)
6bbb4ae8 6942 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6943 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6944 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6945 clp->cl_implid->date.seconds,
6946 clp->cl_implid->date.nseconds);
6bbb4ae8 6947 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6948 return status;
6949}
6950
2031cd1a
WAA		 6951/*
6952 * nfs4_proc_exchange_id()
6953 *
6954 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6955 *
6956 * Since the clientid has expired, all compounds using sessions
6957 * associated with the stale clientid will be returning
6958 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6959 * be in some phase of session reset.
6960 *
6961 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6962 */
6963int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6964{
6965 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6966 int status;
6967
6968 /* try SP4_MACH_CRED if krb5i/p */
6969 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6970 authflavor == RPC_AUTH_GSS_KRB5P) {
6971 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6972 if (!status)
6973 return 0;
6974 }
6975
6976 /* try SP4_NONE */
6977 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6978}
6979
66245539
TM		 6980static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6981 struct rpc_cred *cred)
6982{
6983 struct rpc_message msg = {
6984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6985 .rpc_argp = clp,
6986 .rpc_cred = cred,
6987 };
6988 int status;
6989
6990 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6991 trace_nfs4_destroy_clientid(clp, status);
66245539 6992 if (status)
02c67525 6993 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6994 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6995 return status;
6996}
6997
6998static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6999 struct rpc_cred *cred)
7000{
7001 unsigned int loop;
7002 int ret;
7003
7004 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7005 ret = _nfs4_proc_destroy_clientid(clp, cred);
7006 switch (ret) {
7007 case -NFS4ERR_DELAY:
7008 case -NFS4ERR_CLIENTID_BUSY:
7009 ssleep(1);
7010 break;
7011 default:
7012 return ret;
7013 }
7014 }
7015 return 0;
7016}
7017
7018int nfs4_destroy_clientid(struct nfs_client *clp)
7019{
7020 struct rpc_cred *cred;
7021 int ret = 0;
7022
7023 if (clp->cl_mvops->minor_version < 1)
7024 goto out;
7025 if (clp->cl_exchange_flags == 0)
7026 goto out;
05f4c350
CL		 7027 if (clp->cl_preserve_clid)
7028 goto out;
73d8bde5 7029 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7030 ret = nfs4_proc_destroy_clientid(clp, cred);
7031 if (cred)
7032 put_rpccred(cred);
7033 switch (ret) {
7034 case 0:
7035 case -NFS4ERR_STALE_CLIENTID:
7036 clp->cl_exchange_flags = 0;
7037 }
7038out:
7039 return ret;
7040}
7041
2050f0cc
AA		 7042struct nfs4_get_lease_time_data {
7043 struct nfs4_get_lease_time_args *args;
7044 struct nfs4_get_lease_time_res *res;
7045 struct nfs_client *clp;
7046};
7047
7048static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7049 void *calldata)
7050{
2050f0cc
AA		 7051 struct nfs4_get_lease_time_data *data =
7052 (struct nfs4_get_lease_time_data *)calldata;
7053
7054 dprintk("--> %s\n", __func__);
7055 /* just setup sequence, do not trigger session recovery
7056 since we're invoked within one */
d9afbd1b
TM		 7057 nfs41_setup_sequence(data->clp->cl_session,
7058 &data->args->la_seq_args,
7059 &data->res->lr_seq_res,
7060 task);
2050f0cc
AA		 7061 dprintk("<-- %s\n", __func__);
7062}
7063
7064/*
7065 * Called from nfs4_state_manager thread for session setup, so don't recover
7066 * from sequence operation or clientid errors.
7067 */
7068static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7069{
7070 struct nfs4_get_lease_time_data *data =
7071 (struct nfs4_get_lease_time_data *)calldata;
7072
7073 dprintk("--> %s\n", __func__);
14516c3a
TM		 7074 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7075 return;
2050f0cc
AA		 7076 switch (task->tk_status) {
7077 case -NFS4ERR_DELAY:
7078 case -NFS4ERR_GRACE:
7079 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7080 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7081 task->tk_status = 0;
a8a4ae3a
AA		 7082 /* fall through */
7083 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7084 rpc_restart_call_prepare(task);
2050f0cc
AA		 7085 return;
7086 }
2050f0cc
AA		 7087 dprintk("<-- %s\n", __func__);
7088}
7089
17280175 7090static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7091 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7092 .rpc_call_done = nfs4_get_lease_time_done,
7093};
7094
7095int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7096{
7097 struct rpc_task *task;
7098 struct nfs4_get_lease_time_args args;
7099 struct nfs4_get_lease_time_res res = {
7100 .lr_fsinfo = fsinfo,
7101 };
7102 struct nfs4_get_lease_time_data data = {
7103 .args = &args,
7104 .res = &res,
7105 .clp = clp,
7106 };
7107 struct rpc_message msg = {
7108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7109 .rpc_argp = &args,
7110 .rpc_resp = &res,
7111 };
7112 struct rpc_task_setup task_setup = {
7113 .rpc_client = clp->cl_rpcclient,
7114 .rpc_message = &msg,
7115 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7116 .callback_data = &data,
7117 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7118 };
7119 int status;
7120
a9c92d6b 7121 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7122 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7123 dprintk("--> %s\n", __func__);
7124 task = rpc_run_task(&task_setup);
7125
7126 if (IS_ERR(task))
7127 status = PTR_ERR(task);
7128 else {
7129 status = task->tk_status;
7130 rpc_put_task(task);
7131 }
7132 dprintk("<-- %s return %d\n", __func__, status);
7133
7134 return status;
7135}
7136
fc931582
AA		 7137/*
7138 * Initialize the values to be used by the client in CREATE_SESSION
7139 * If nfs4_init_session set the fore channel request and response sizes,
7140 * use them.
7141 *
7142 * Set the back channel max_resp_sz_cached to zero to force the client to
7143 * always set csa_cachethis to FALSE because the current implementation
7144 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7145 */
7146static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7147{
18aad3d5
AA		 7148 unsigned int max_rqst_sz, max_resp_sz;
7149
7150 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7151 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7152
fc931582 7153 /* Fore channel attributes */
18aad3d5
AA		 7154 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7155 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7156 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7157 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7158
7159 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7160 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7161 __func__,
7162 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7163 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7164
7165 /* Back channel attributes */
fc931582
AA		 7166 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7167 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7168 args->bc_attrs.max_resp_sz_cached = 0;
7169 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7170 args->bc_attrs.max_reqs = 1;
7171
7172 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7173 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7174 __func__,
7175 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7176 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7177 args->bc_attrs.max_reqs);
7178}
7179
79969dd1
TM		 7180static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7181 struct nfs41_create_session_res *res)
8d35301d 7182{
43c2e885 7183 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7184 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7185
43c2e885
BF		 7186 if (rcvd->max_resp_sz > sent->max_resp_sz)
7187 return -EINVAL;
7188 /*
7189 * Our requested max_ops is the minimum we need; we're not
7190 * prepared to break up compounds into smaller pieces than that.
7191 * So, no point even trying to continue if the server won't
7192 * cooperate:
7193 */
7194 if (rcvd->max_ops < sent->max_ops)
7195 return -EINVAL;
7196 if (rcvd->max_reqs == 0)
7197 return -EINVAL;
b4b9a0c1
VG		 7198 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7199 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7200 return 0;
8d35301d
AA		 7201}
7202
79969dd1
TM		 7203static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7204 struct nfs41_create_session_res *res)
43c2e885
BF		 7205{
7206 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7207 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7208
b1c0df5f
TM		 7209 if (!(res->flags & SESSION4_BACK_CHAN))
7210 goto out;
43c2e885
BF		 7211 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7212 return -EINVAL;
7213 if (rcvd->max_resp_sz < sent->max_resp_sz)
7214 return -EINVAL;
7215 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7216 return -EINVAL;
7217 /* These would render the backchannel useless: */
b4b9a0c1 7218 if (rcvd->max_ops != sent->max_ops)
43c2e885 7219 return -EINVAL;
b4b9a0c1 7220 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7221 return -EINVAL;
b1c0df5f 7222out:
43c2e885
BF		 7223 return 0;
7224}
8d35301d 7225
8d35301d 7226static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7227 struct nfs41_create_session_res *res)
8d35301d 7228{
43c2e885 7229 int ret;
8d35301d 7230
79969dd1 7231 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7232 if (ret)
7233 return ret;
79969dd1
TM		 7234 return nfs4_verify_back_channel_attrs(args, res);
7235}
7236
7237static void nfs4_update_session(struct nfs4_session *session,
7238 struct nfs41_create_session_res *res)
7239{
7240 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7241 /* Mark client id and session as being confirmed */
7242 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7243 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7244 session->flags = res->flags;
7245 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7246 if (res->flags & SESSION4_BACK_CHAN)
7247 memcpy(&session->bc_attrs, &res->bc_attrs,
7248 sizeof(session->bc_attrs));
8d35301d
AA		 7249}
7250
848f5bda
TM		 7251static int _nfs4_proc_create_session(struct nfs_client *clp,
7252 struct rpc_cred *cred)
fc931582
AA		 7253{
7254 struct nfs4_session *session = clp->cl_session;
7255 struct nfs41_create_session_args args = {
7256 .client = clp,
79969dd1
TM		 7257 .clientid = clp->cl_clientid,
7258 .seqid = clp->cl_seqid,
fc931582
AA		 7259 .cb_program = NFS4_CALLBACK,
7260 };
79969dd1
TM		 7261 struct nfs41_create_session_res res;
7262
fc931582
AA		 7263 struct rpc_message msg = {
7264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7265 .rpc_argp = &args,
7266 .rpc_resp = &res,
848f5bda 7267 .rpc_cred = cred,
fc931582
AA		 7268 };
7269 int status;
7270
7271 nfs4_init_channel_attrs(&args);
0f91421e 7272 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7273
1bd714f2 7274 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7275 trace_nfs4_create_session(clp, status);
fc931582 7276
43095d39 7277 if (!status) {
8d35301d 7278 /* Verify the session's negotiated channel_attrs values */
79969dd1 7279 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7280 /* Increment the clientid slot sequence id */
79969dd1
TM		 7281 if (clp->cl_seqid == res.seqid)
7282 clp->cl_seqid++;
7283 if (status)
7284 goto out;
7285 nfs4_update_session(session, &res);
fc931582 7286 }
79969dd1 7287out:
fc931582
AA		 7288 return status;
7289}
7290
7291/*
7292 * Issues a CREATE_SESSION operation to the server.
7293 * It is the responsibility of the caller to verify the session is
7294 * expired before calling this routine.
7295 */
848f5bda 7296int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7297{
7298 int status;
7299 unsigned *ptr;
fc931582
AA		 7300 struct nfs4_session *session = clp->cl_session;
7301
7302 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7303
848f5bda 7304 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7305 if (status)
7306 goto out;
7307
aacd5537
AA		 7308 /* Init or reset the session slot tables */
7309 status = nfs4_setup_session_slot_tables(session);
7310 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7311 if (status)
7312 goto out;
7313
7314 ptr = (unsigned *)&session->sess_id.data[0];
7315 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7316 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7317out:
7318 dprintk("<-- %s\n", __func__);
7319 return status;
7320}
7321
0f3e66c6
AA		 7322/*
7323 * Issue the over-the-wire RPC DESTROY_SESSION.
7324 * The caller must serialize access to this routine.
7325 */
848f5bda
TM		 7326int nfs4_proc_destroy_session(struct nfs4_session *session,
7327 struct rpc_cred *cred)
0f3e66c6 7328{
848f5bda
TM		 7329 struct rpc_message msg = {
7330 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7331 .rpc_argp = session,
7332 .rpc_cred = cred,
7333 };
0f3e66c6 7334 int status = 0;
0f3e66c6
AA		 7335
7336 dprintk("--> nfs4_proc_destroy_session\n");
7337
7338 /* session is still being setup */
e11259f9
TM		 7339 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7340 return 0;
0f3e66c6 7341
1bd714f2 7342 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7343 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7344
7345 if (status)
08106ac7 7346 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7347 "Session has been destroyed regardless...\n", status);
7348
7349 dprintk("<-- nfs4_proc_destroy_session\n");
7350 return status;
7351}
7352
fc01cea9
AA		 7353/*
7354 * Renew the cl_session lease.
7355 */
d5f8d3fe
TM		 7356struct nfs4_sequence_data {
7357 struct nfs_client *clp;
7358 struct nfs4_sequence_args args;
7359 struct nfs4_sequence_res res;
7360};
7361
dc96aef9
AB		 7362static void nfs41_sequence_release(void *data)
7363{
d5f8d3fe
TM		 7364 struct nfs4_sequence_data *calldata = data;
7365 struct nfs_client *clp = calldata->clp;
dc96aef9 7366
7135840f
AB		 7367 if (atomic_read(&clp->cl_count) > 1)
7368 nfs4_schedule_state_renewal(clp);
7369 nfs_put_client(clp);
d5f8d3fe 7370 kfree(calldata);
dc96aef9
AB		 7371}
7372
aa5190d0
TM		 7373static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7374{
7375 switch(task->tk_status) {
7376 case -NFS4ERR_DELAY:
aa5190d0
TM		 7377 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7378 return -EAGAIN;
7379 default:
0400a6b0 7380 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7381 }
7382 return 0;
7383}
7384
dc96aef9 7385static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7386{
d5f8d3fe
TM		 7387 struct nfs4_sequence_data *calldata = data;
7388 struct nfs_client *clp = calldata->clp;
fc01cea9 7389
14516c3a
TM		 7390 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7391 return;
fc01cea9 7392
c6d01c6f 7393 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7394 if (task->tk_status < 0) {
7395 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7396 if (atomic_read(&clp->cl_count) == 1)
7397 goto out;
fc01cea9 7398
aa5190d0
TM		 7399 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7400 rpc_restart_call_prepare(task);
fc01cea9
AA		 7401 return;
7402 }
7403 }
fc01cea9 7404 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7405out:
fc01cea9
AA		 7406 dprintk("<-- %s\n", __func__);
7407}
7408
7409static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7410{
d5f8d3fe
TM		 7411 struct nfs4_sequence_data *calldata = data;
7412 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7413 struct nfs4_sequence_args *args;
7414 struct nfs4_sequence_res *res;
7415
fc01cea9
AA		 7416 args = task->tk_msg.rpc_argp;
7417 res = task->tk_msg.rpc_resp;
7418
d9afbd1b 7419 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7420}
7421
7422static const struct rpc_call_ops nfs41_sequence_ops = {
7423 .rpc_call_done = nfs41_sequence_call_done,
7424 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7425 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7426};
7427
8fe72bac
TM		 7428static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7429 struct rpc_cred *cred,
7430 bool is_privileged)
fc01cea9 7431{
d5f8d3fe 7432 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7433 struct rpc_message msg = {
7434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7435 .rpc_cred = cred,
7436 };
71ac6da9
TM		 7437 struct rpc_task_setup task_setup_data = {
7438 .rpc_client = clp->cl_rpcclient,
7439 .rpc_message = &msg,
8fe72bac 7440 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7441 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7442 };
fc01cea9 7443
7135840f 7444 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7445 return ERR_PTR(-EIO);
dfb4f309 7446 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7447 if (calldata == NULL) {
7135840f 7448 nfs_put_client(clp);
71ac6da9 7449 return ERR_PTR(-ENOMEM);
fc01cea9 7450 }
a9c92d6b 7451 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7452 if (is_privileged)
7453 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7454 msg.rpc_argp = &calldata->args;
7455 msg.rpc_resp = &calldata->res;
7456 calldata->clp = clp;
71ac6da9 7457 task_setup_data.callback_data = calldata;
fc01cea9 7458
71ac6da9
TM		 7459 return rpc_run_task(&task_setup_data);
7460}
7461
2f60ea6b 7462static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7463{
7464 struct rpc_task *task;
7465 int ret = 0;
7466
2f60ea6b 7467 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7468 return -EAGAIN;
8fe72bac 7469 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7470 if (IS_ERR(task))
7471 ret = PTR_ERR(task);
7472 else
bf294b41 7473 rpc_put_task_async(task);
71ac6da9
TM		 7474 dprintk("<-- %s status=%d\n", __func__, ret);
7475 return ret;
7476}
7477
7478static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7479{
7480 struct rpc_task *task;
7481 int ret;
7482
8fe72bac 7483 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7484 if (IS_ERR(task)) {
7485 ret = PTR_ERR(task);
7486 goto out;
7487 }
7488 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7489 if (!ret) {
7490 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7491
7492 if (task->tk_status == 0)
7493 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7494 ret = task->tk_status;
b4410c2f 7495 }
71ac6da9
TM		 7496 rpc_put_task(task);
7497out:
7498 dprintk("<-- %s status=%d\n", __func__, ret);
7499 return ret;
fc01cea9
AA		 7500}
7501
fce5c838
RL		 7502struct nfs4_reclaim_complete_data {
7503 struct nfs_client *clp;
7504 struct nfs41_reclaim_complete_args arg;
7505 struct nfs41_reclaim_complete_res res;
7506};
7507
7508static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7509{
7510 struct nfs4_reclaim_complete_data *calldata = data;
7511
d9afbd1b
TM		 7512 nfs41_setup_sequence(calldata->clp->cl_session,
7513 &calldata->arg.seq_args,
7514 &calldata->res.seq_res,
7515 task);
fce5c838
RL		 7516}
7517
aa5190d0
TM		 7518static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7519{
7520 switch(task->tk_status) {
7521 case 0:
7522 case -NFS4ERR_COMPLETE_ALREADY:
7523 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7524 break;
7525 case -NFS4ERR_DELAY:
aa5190d0 7526 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7527 /* fall through */
7528 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7529 return -EAGAIN;
7530 default:
0400a6b0 7531 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7532 }
7533 return 0;
7534}
7535
fce5c838
RL		 7536static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7537{
7538 struct nfs4_reclaim_complete_data *calldata = data;
7539 struct nfs_client *clp = calldata->clp;
7540 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7541
7542 dprintk("--> %s\n", __func__);
14516c3a
TM		 7543 if (!nfs41_sequence_done(task, res))
7544 return;
fce5c838 7545
c6d01c6f 7546 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7547 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7548 rpc_restart_call_prepare(task);
7549 return;
7550 }
fce5c838
RL		 7551 dprintk("<-- %s\n", __func__);
7552}
7553
7554static void nfs4_free_reclaim_complete_data(void *data)
7555{
7556 struct nfs4_reclaim_complete_data *calldata = data;
7557
7558 kfree(calldata);
7559}
7560
7561static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7562 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7563 .rpc_call_done = nfs4_reclaim_complete_done,
7564 .rpc_release = nfs4_free_reclaim_complete_data,
7565};
7566
7567/*
7568 * Issue a global reclaim complete.
7569 */
965e9c23
TM		 7570static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7571 struct rpc_cred *cred)
fce5c838
RL		 7572{
7573 struct nfs4_reclaim_complete_data *calldata;
7574 struct rpc_task *task;
7575 struct rpc_message msg = {
7576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7577 .rpc_cred = cred,
fce5c838
RL		 7578 };
7579 struct rpc_task_setup task_setup_data = {
7580 .rpc_client = clp->cl_rpcclient,
7581 .rpc_message = &msg,
7582 .callback_ops = &nfs4_reclaim_complete_call_ops,
7583 .flags = RPC_TASK_ASYNC,
7584 };
7585 int status = -ENOMEM;
7586
7587 dprintk("--> %s\n", __func__);
8535b2be 7588 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7589 if (calldata == NULL)
7590 goto out;
7591 calldata->clp = clp;
7592 calldata->arg.one_fs = 0;
fce5c838 7593
a9c92d6b 7594 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7595 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7596 msg.rpc_argp = &calldata->arg;
7597 msg.rpc_resp = &calldata->res;
7598 task_setup_data.callback_data = calldata;
7599 task = rpc_run_task(&task_setup_data);
acf82b85 7600 if (IS_ERR(task)) {
fce5c838 7601 status = PTR_ERR(task);
acf82b85
DC		 7602 goto out;
7603 }
c34c32ea
AA		 7604 status = nfs4_wait_for_completion_rpc_task(task);
7605 if (status == 0)
7606 status = task->tk_status;
fce5c838 7607 rpc_put_task(task);
acf82b85 7608 return 0;
fce5c838
RL		 7609out:
7610 dprintk("<-- %s status=%d\n", __func__, status);
7611 return status;
7612}
b1f69b75
AA		 7613
7614static void
7615nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7616{
7617 struct nfs4_layoutget *lgp = calldata;
c31663d4 7618 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7619 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7620
7621 dprintk("--> %s\n", __func__);
c31663d4
FI		 7622 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7623 * right now covering the LAYOUTGET we are about to send.
7624 * However, that is not so catastrophic, and there seems
7625 * to be no way to prevent it completely.
7626 */
6ba7db34 7627 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7628 &lgp->res.seq_res, task))
b1f69b75 7629 return;
cf7d63f1
FI		 7630 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7631 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7632 &lgp->args.range,
cf7d63f1
FI		 7633 lgp->args.ctx->state)) {
7634 rpc_exit(task, NFS4_OK);
cf7d63f1 7635 }
b1f69b75
AA		 7636}
7637
7638static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7639{
7640 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7641 struct inode *inode = lgp->args.inode;
7642 struct nfs_server *server = NFS_SERVER(inode);
7643 struct pnfs_layout_hdr *lo;
7644 struct nfs4_state *state = NULL;
ed7e5423 7645 unsigned long timeo, now, giveup;
b1f69b75 7646
ed7e5423 7647 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7648
6ba7db34 7649 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7650 goto out;
b1f69b75
AA		 7651
7652 switch (task->tk_status) {
7653 case 0:
ee314c2a 7654 goto out;
ed7e5423
BH		 7655 /*
7656 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7657 * (or clients) writing to the same RAID stripe
7658 */
b1f69b75 7659 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7660 /*
7661 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7662 * existing layout before getting a new one).
7663 */
b1f69b75 7664 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7665 timeo = rpc_get_timeout(task->tk_client);
7666 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7667 now = jiffies;
7668 if (time_after(giveup, now)) {
7669 unsigned long delay;
7670
7671 /* Delay for:
7672 * - Not less then NFS4_POLL_RETRY_MIN.
7673 * - One last time a jiffie before we give up
7674 * - exponential backoff (time_now minus start_attempt)
7675 */
7676 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7677 min((giveup - now - 1),
7678 now - lgp->args.timestamp));
7679
7680 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7681 __func__, delay);
7682 rpc_delay(task, delay);
7683 task->tk_status = 0;
7684 rpc_restart_call_prepare(task);
7685 goto out; /* Do not call nfs4_async_handle_error() */
7686 }
ee314c2a
TM		 7687 break;
7688 case -NFS4ERR_EXPIRED:
7689 case -NFS4ERR_BAD_STATEID:
7690 spin_lock(&inode->i_lock);
7691 lo = NFS_I(inode)->layout;
7692 if (!lo || list_empty(&lo->plh_segs)) {
7693 spin_unlock(&inode->i_lock);
7694 /* If the open stateid was bad, then recover it. */
7695 state = lgp->args.ctx->state;
7696 } else {
7697 LIST_HEAD(head);
7698
defb8460
CH		 7699 /*
7700 * Mark the bad layout state as invalid, then retry
7701 * with the current stateid.
7702 */
ee314c2a
TM		 7703 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7704 spin_unlock(&inode->i_lock);
ee314c2a 7705 pnfs_free_lseg_list(&head);
defb8460
CH		 7706
7707 task->tk_status = 0;
7708 rpc_restart_call_prepare(task);
b1f69b75
AA		 7709 }
7710 }
8478eaa1 7711 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7712 rpc_restart_call_prepare(task);
7713out:
b1f69b75
AA		 7714 dprintk("<-- %s\n", __func__);
7715}
7716
8554116e
IK		 7717static size_t max_response_pages(struct nfs_server *server)
7718{
7719 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7720 return nfs_page_array_len(0, max_resp_sz);
7721}
7722
7723static void nfs4_free_pages(struct page **pages, size_t size)
7724{
7725 int i;
7726
7727 if (!pages)
7728 return;
7729
7730 for (i = 0; i < size; i++) {
7731 if (!pages[i])
7732 break;
7733 __free_page(pages[i]);
7734 }
7735 kfree(pages);
7736}
7737
7738static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7739{
7740 struct page **pages;
7741 int i;
7742
7743 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7744 if (!pages) {
7745 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7746 return NULL;
7747 }
7748
7749 for (i = 0; i < size; i++) {
7750 pages[i] = alloc_page(gfp_flags);
7751 if (!pages[i]) {
7752 dprintk("%s: failed to allocate page\n", __func__);
7753 nfs4_free_pages(pages, size);
7754 return NULL;
7755 }
7756 }
7757
7758 return pages;
7759}
7760
b1f69b75
AA		 7761static void nfs4_layoutget_release(void *calldata)
7762{
7763 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7764 struct inode *inode = lgp->args.inode;
7765 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7766 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7767
7768 dprintk("--> %s\n", __func__);
8554116e 7769 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7770 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7771 put_nfs_open_context(lgp->args.ctx);
7772 kfree(calldata);
7773 dprintk("<-- %s\n", __func__);
7774}
7775
7776static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7777 .rpc_call_prepare = nfs4_layoutget_prepare,
7778 .rpc_call_done = nfs4_layoutget_done,
7779 .rpc_release = nfs4_layoutget_release,
7780};
7781
a0b0a6e3
TM		 7782struct pnfs_layout_segment *
7783nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7784{
a47970ff
WAA		 7785 struct inode *inode = lgp->args.inode;
7786 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7787 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7788 struct rpc_task *task;
7789 struct rpc_message msg = {
7790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7791 .rpc_argp = &lgp->args,
7792 .rpc_resp = &lgp->res,
6ab59344 7793 .rpc_cred = lgp->cred,
b1f69b75
AA		 7794 };
7795 struct rpc_task_setup task_setup_data = {
7796 .rpc_client = server->client,
7797 .rpc_message = &msg,
7798 .callback_ops = &nfs4_layoutget_call_ops,
7799 .callback_data = lgp,
7800 .flags = RPC_TASK_ASYNC,
7801 };
a0b0a6e3 7802 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7803 int status = 0;
7804
7805 dprintk("--> %s\n", __func__);
7806
4bd5a980
PT		 7807 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7808 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7809
8554116e
IK		 7810 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7811 if (!lgp->args.layout.pages) {
7812 nfs4_layoutget_release(lgp);
a0b0a6e3 7813 return ERR_PTR(-ENOMEM);
8554116e
IK		 7814 }
7815 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7816 lgp->args.timestamp = jiffies;
8554116e 7817
35124a09 7818 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7819 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7820 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7821
b1f69b75
AA		 7822 task = rpc_run_task(&task_setup_data);
7823 if (IS_ERR(task))
a0b0a6e3 7824 return ERR_CAST(task);
b1f69b75 7825 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7826 if (status == 0)
7827 status = task->tk_status;
1037e6ea
TM		 7828 trace_nfs4_layoutget(lgp->args.ctx,
7829 &lgp->args.range,
7830 &lgp->res.range,
7831 status);
085b7a45
WAA		 7832 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7833 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7834 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7835 rpc_put_task(task);
7836 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7837 if (status)
7838 return ERR_PTR(status);
7839 return lseg;
b1f69b75
AA		 7840}
7841
cbe82603
BH		 7842static void
7843nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7844{
7845 struct nfs4_layoutreturn *lrp = calldata;
7846
7847 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7848 nfs41_setup_sequence(lrp->clp->cl_session,
7849 &lrp->args.seq_args,
7850 &lrp->res.seq_res,
7851 task);
cbe82603
BH		 7852}
7853
7854static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7855{
7856 struct nfs4_layoutreturn *lrp = calldata;
7857 struct nfs_server *server;
7858
7859 dprintk("--> %s\n", __func__);
7860
6ba7db34 7861 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7862 return;
7863
7864 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7865 switch (task->tk_status) {
7866 default:
7867 task->tk_status = 0;
7868 case 0:
7869 break;
7870 case -NFS4ERR_DELAY:
8478eaa1 7871 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7872 break;
d00c5d43 7873 rpc_restart_call_prepare(task);
cbe82603
BH		 7874 return;
7875 }
cbe82603
BH		 7876 dprintk("<-- %s\n", __func__);
7877}
7878
7879static void nfs4_layoutreturn_release(void *calldata)
7880{
7881 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7882 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7883
7884 dprintk("--> %s\n", __func__);
849b286f
TM		 7885 spin_lock(&lo->plh_inode->i_lock);
7886 if (lrp->res.lrs_present)
7887 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7888 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7889 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7890 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7891 lo->plh_block_lgets--;
7892 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7893 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7894 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7895 kfree(calldata);
7896 dprintk("<-- %s\n", __func__);
7897}
7898
7899static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7900 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7901 .rpc_call_done = nfs4_layoutreturn_done,
7902 .rpc_release = nfs4_layoutreturn_release,
7903};
7904
6c16605d 7905int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7906{
7907 struct rpc_task *task;
7908 struct rpc_message msg = {
7909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7910 .rpc_argp = &lrp->args,
7911 .rpc_resp = &lrp->res,
9556000d 7912 .rpc_cred = lrp->cred,
cbe82603
BH		 7913 };
7914 struct rpc_task_setup task_setup_data = {
1771c577 7915 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7916 .rpc_message = &msg,
7917 .callback_ops = &nfs4_layoutreturn_call_ops,
7918 .callback_data = lrp,
7919 };
6c16605d 7920 int status = 0;
cbe82603
BH		 7921
7922 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 7923 if (!sync) {
7924 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
7925 if (!lrp->inode) {
7926 nfs4_layoutreturn_release(lrp);
7927 return -EAGAIN;
7928 }
7929 task_setup_data.flags |= RPC_TASK_ASYNC;
7930 }
a9c92d6b 7931 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7932 task = rpc_run_task(&task_setup_data);
7933 if (IS_ERR(task))
7934 return PTR_ERR(task);
5a0ec8ac
TM		 7935 if (sync)
7936 status = task->tk_status;
1037e6ea 7937 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7938 dprintk("<-- %s status=%d\n", __func__, status);
7939 rpc_put_task(task);
7940 return status;
7941}
7942
b1f69b75 7943static int
cd5875fe
TM		 7944_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7945 struct pnfs_device *pdev,
7946 struct rpc_cred *cred)
b1f69b75
AA		 7947{
7948 struct nfs4_getdeviceinfo_args args = {
7949 .pdev = pdev,
4e590803
TM		 7950 .notify_types = NOTIFY_DEVICEID4_CHANGE |
7951 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 7952 };
7953 struct nfs4_getdeviceinfo_res res = {
7954 .pdev = pdev,
7955 };
7956 struct rpc_message msg = {
7957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7958 .rpc_argp = &args,
7959 .rpc_resp = &res,
cd5875fe 7960 .rpc_cred = cred,
b1f69b75
AA		 7961 };
7962 int status;
7963
7964 dprintk("--> %s\n", __func__);
7c513058 7965 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 7966 if (res.notification & ~args.notify_types)
7967 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 7968 if (res.notification != args.notify_types)
7969 pdev->nocache = 1;
4e590803 7970
b1f69b75
AA		 7971 dprintk("<-- %s status=%d\n", __func__, status);
7972
7973 return status;
7974}
7975
cd5875fe
TM		 7976int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7977 struct pnfs_device *pdev,
7978 struct rpc_cred *cred)
b1f69b75
AA		 7979{
7980 struct nfs4_exception exception = { };
7981 int err;
7982
7983 do {
7984 err = nfs4_handle_exception(server,
cd5875fe 7985 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7986 &exception);
7987 } while (exception.retry);
7988 return err;
7989}
7990EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7991
863a3c6c
AA		 7992static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7993{
7994 struct nfs4_layoutcommit_data *data = calldata;
7995 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7996 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7997
d9afbd1b
TM		 7998 nfs41_setup_sequence(session,
7999 &data->args.seq_args,
8000 &data->res.seq_res,
8001 task);
863a3c6c
AA		 8002}
8003
8004static void
8005nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8006{
8007 struct nfs4_layoutcommit_data *data = calldata;
8008 struct nfs_server *server = NFS_SERVER(data->args.inode);
8009
6ba7db34 8010 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8011 return;
8012
8013 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8014 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8015 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8016 case -NFS4ERR_BADLAYOUT: /* no layout */
8017 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8018 task->tk_status = 0;
e59d27e0 8019 case 0:
e59d27e0
TM		 8020 break;
8021 default:
8478eaa1 8022 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8023 rpc_restart_call_prepare(task);
8024 return;
8025 }
8026 }
863a3c6c
AA		 8027}
8028
8029static void nfs4_layoutcommit_release(void *calldata)
8030{
8031 struct nfs4_layoutcommit_data *data = calldata;
8032
db29c089 8033 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8034 nfs_post_op_update_inode_force_wcc(data->args.inode,
8035 data->res.fattr);
863a3c6c 8036 put_rpccred(data->cred);
472e2594 8037 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8038 kfree(data);
8039}
8040
8041static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8042 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8043 .rpc_call_done = nfs4_layoutcommit_done,
8044 .rpc_release = nfs4_layoutcommit_release,
8045};
8046
8047int
ef311537 8048nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8049{
8050 struct rpc_message msg = {
8051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8052 .rpc_argp = &data->args,
8053 .rpc_resp = &data->res,
8054 .rpc_cred = data->cred,
8055 };
8056 struct rpc_task_setup task_setup_data = {
8057 .task = &data->task,
8058 .rpc_client = NFS_CLIENT(data->args.inode),
8059 .rpc_message = &msg,
8060 .callback_ops = &nfs4_layoutcommit_ops,
8061 .callback_data = data,
863a3c6c
AA		 8062 };
8063 struct rpc_task *task;
8064 int status = 0;
8065
8066 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8067 "lbw: %llu inode %lu\n",
8068 data->task.tk_pid, sync,
8069 data->args.lastbytewritten,
8070 data->args.inode->i_ino);
8071
472e2594
TM		 8072 if (!sync) {
8073 data->inode = nfs_igrab_and_active(data->args.inode);
8074 if (data->inode == NULL) {
8075 nfs4_layoutcommit_release(data);
8076 return -EAGAIN;
8077 }
8078 task_setup_data.flags = RPC_TASK_ASYNC;
8079 }
a9c92d6b 8080 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8081 task = rpc_run_task(&task_setup_data);
8082 if (IS_ERR(task))
8083 return PTR_ERR(task);
472e2594
TM		 8084 if (sync)
8085 status = task->tk_status;
1037e6ea 8086 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8087 dprintk("%s: status %d\n", __func__, status);
8088 rpc_put_task(task);
8089 return status;
8090}
fca78d6d 8091
97431204
AA		 8092/**
8093 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8094 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8095 */
fca78d6d
BS		 8096static int
8097_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8098 struct nfs_fsinfo *info,
8099 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8100{
8101 struct nfs41_secinfo_no_name_args args = {
8102 .style = SECINFO_STYLE_CURRENT_FH,
8103 };
8104 struct nfs4_secinfo_res res = {
8105 .flavors = flavors,
8106 };
8107 struct rpc_message msg = {
8108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8109 .rpc_argp = &args,
8110 .rpc_resp = &res,
8111 };
b1b3e136 8112 struct rpc_clnt *clnt = server->client;
7cb852df 8113 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8114 int status;
8115
8116 if (use_integrity) {
8117 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8118 cred = nfs4_get_clid_cred(server->nfs_client);
8119 msg.rpc_cred = cred;
b1b3e136
WAA		 8120 }
8121
8122 dprintk("--> %s\n", __func__);
8123 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8124 &res.seq_res, 0);
8125 dprintk("<-- %s status=%d\n", __func__, status);
8126
7cb852df
WAA		 8127 if (cred)
8128 put_rpccred(cred);
b1b3e136
WAA		 8129
8130 return status;
fca78d6d
BS		 8131}
8132
8133static int
8134nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8135 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8136{
8137 struct nfs4_exception exception = { };
8138 int err;
8139 do {
b1b3e136
WAA		 8140 /* first try using integrity protection */
8141 err = -NFS4ERR_WRONGSEC;
8142
8143 /* try to use integrity protection with machine cred */
8144 if (_nfs4_is_integrity_protected(server->nfs_client))
8145 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8146 flavors, true);
8147
8148 /*
8149 * if unable to use integrity protection, or SECINFO with
8150 * integrity protection returns NFS4ERR_WRONGSEC (which is
8151 * disallowed by spec, but exists in deployed servers) use
8152 * the current filesystem's rpc_client and the user cred.
8153 */
8154 if (err == -NFS4ERR_WRONGSEC)
8155 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8156 flavors, false);
8157
fca78d6d
BS		 8158 switch (err) {
8159 case 0:
8160 case -NFS4ERR_WRONGSEC:
78b19bae 8161 case -ENOTSUPP:
05e9cfb4 8162 goto out;
fca78d6d
BS		 8163 default:
8164 err = nfs4_handle_exception(server, err, &exception);
8165 }
8166 } while (exception.retry);
05e9cfb4 8167out:
fca78d6d
BS		 8168 return err;
8169}
8170
8171static int
8172nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8173 struct nfs_fsinfo *info)
8174{
8175 int err;
8176 struct page *page;
367156d9 8177 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8178 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8179 struct nfs4_secinfo4 *secinfo;
8180 int i;
fca78d6d
BS		 8181
8182 page = alloc_page(GFP_KERNEL);
8183 if (!page) {
8184 err = -ENOMEM;
8185 goto out;
8186 }
8187
8188 flavors = page_address(page);
8189 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8190
8191 /*
8192 * Fall back on "guess and check" method if
8193 * the server doesn't support SECINFO_NO_NAME
8194 */
78b19bae 8195 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8196 err = nfs4_find_root_sec(server, fhandle, info);
8197 goto out_freepage;
8198 }
8199 if (err)
8200 goto out_freepage;
8201
58a8cf12
WAA		 8202 for (i = 0; i < flavors->num_flavors; i++) {
8203 secinfo = &flavors->flavors[i];
8204
8205 switch (secinfo->flavor) {
8206 case RPC_AUTH_NULL:
8207 case RPC_AUTH_UNIX:
8208 case RPC_AUTH_GSS:
8209 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8210 &secinfo->flavor_info);
8211 break;
8212 default:
8213 flavor = RPC_AUTH_MAXFLAVOR;
8214 break;
8215 }
8216
4d4b69dd
WAA		 8217 if (!nfs_auth_info_match(&server->auth_info, flavor))
8218 flavor = RPC_AUTH_MAXFLAVOR;
8219
58a8cf12
WAA		 8220 if (flavor != RPC_AUTH_MAXFLAVOR) {
8221 err = nfs4_lookup_root_sec(server, fhandle,
8222 info, flavor);
8223 if (!err)
8224 break;
8225 }
8226 }
8227
8228 if (flavor == RPC_AUTH_MAXFLAVOR)
8229 err = -EPERM;
fca78d6d
BS		 8230
8231out_freepage:
8232 put_page(page);
8233 if (err == -EACCES)
8234 return -EPERM;
8235out:
8236 return err;
8237}
1cab0652 8238
ab7cb0df
TM		 8239static int _nfs41_test_stateid(struct nfs_server *server,
8240 nfs4_stateid *stateid,
8241 struct rpc_cred *cred)
7d974794
BS		 8242{
8243 int status;
8244 struct nfs41_test_stateid_args args = {
1cab0652 8245 .stateid = stateid,
7d974794
BS		 8246 };
8247 struct nfs41_test_stateid_res res;
8248 struct rpc_message msg = {
8249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8250 .rpc_argp = &args,
8251 .rpc_resp = &res,
ab7cb0df 8252 .rpc_cred = cred,
7d974794 8253 };
3787d506
WAA		 8254 struct rpc_clnt *rpc_client = server->client;
8255
8256 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8257 &rpc_client, &msg);
1cab0652 8258
38527b15 8259 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8260 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8261 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8262 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8263 &args.seq_args, &res.seq_res);
38527b15
CL		 8264 if (status != NFS_OK) {
8265 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8266 return status;
38527b15
CL		 8267 }
8268 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8269 return -res.status;
7d974794
BS		 8270}
8271
38527b15
CL		 8272/**
8273 * nfs41_test_stateid - perform a TEST_STATEID operation
8274 *
8275 * @server: server / transport on which to perform the operation
8276 * @stateid: state ID to test
ab7cb0df 8277 * @cred: credential
38527b15
CL		 8278 *
8279 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8280 * Otherwise a negative NFS4ERR value is returned if the operation
8281 * failed or the state ID is not currently valid.
8282 */
ab7cb0df
TM		 8283static int nfs41_test_stateid(struct nfs_server *server,
8284 nfs4_stateid *stateid,
8285 struct rpc_cred *cred)
7d974794
BS		 8286{
8287 struct nfs4_exception exception = { };
8288 int err;
8289 do {
ab7cb0df 8290 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8291 if (err != -NFS4ERR_DELAY)
8292 break;
8293 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8294 } while (exception.retry);
8295 return err;
8296}
9aeda35f 8297
7c1d5fae
TM		 8298struct nfs_free_stateid_data {
8299 struct nfs_server *server;
8300 struct nfs41_free_stateid_args args;
9aeda35f 8301 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8302};
8303
8304static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8305{
8306 struct nfs_free_stateid_data *data = calldata;
8307 nfs41_setup_sequence(nfs4_get_session(data->server),
8308 &data->args.seq_args,
8309 &data->res.seq_res,
8310 task);
8311}
8312
8313static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8314{
8315 struct nfs_free_stateid_data *data = calldata;
8316
8317 nfs41_sequence_done(task, &data->res.seq_res);
8318
8319 switch (task->tk_status) {
8320 case -NFS4ERR_DELAY:
8478eaa1 8321 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8322 rpc_restart_call_prepare(task);
8323 }
8324}
8325
8326static void nfs41_free_stateid_release(void *calldata)
8327{
8328 kfree(calldata);
8329}
8330
17f26b12 8331static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8332 .rpc_call_prepare = nfs41_free_stateid_prepare,
8333 .rpc_call_done = nfs41_free_stateid_done,
8334 .rpc_release = nfs41_free_stateid_release,
8335};
8336
8337static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8338 nfs4_stateid *stateid,
ab7cb0df 8339 struct rpc_cred *cred,
7c1d5fae
TM		 8340 bool privileged)
8341{
9aeda35f
BS		 8342 struct rpc_message msg = {
8343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8344 .rpc_cred = cred,
9aeda35f 8345 };
7c1d5fae
TM		 8346 struct rpc_task_setup task_setup = {
8347 .rpc_client = server->client,
8348 .rpc_message = &msg,
8349 .callback_ops = &nfs41_free_stateid_ops,
8350 .flags = RPC_TASK_ASYNC,
8351 };
8352 struct nfs_free_stateid_data *data;
9aeda35f 8353
3787d506
WAA		 8354 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8355 &task_setup.rpc_client, &msg);
8356
38527b15 8357 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8358 data = kmalloc(sizeof(*data), GFP_NOFS);
8359 if (!data)
8360 return ERR_PTR(-ENOMEM);
8361 data->server = server;
8362 nfs4_stateid_copy(&data->args.stateid, stateid);
8363
8364 task_setup.callback_data = data;
8365
8366 msg.rpc_argp = &data->args;
8367 msg.rpc_resp = &data->res;
a9c92d6b 8368 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8369 if (privileged)
8370 nfs4_set_sequence_privileged(&data->args.seq_args);
8371
8372 return rpc_run_task(&task_setup);
9aeda35f
BS		 8373}
8374
38527b15
CL		 8375/**
8376 * nfs41_free_stateid - perform a FREE_STATEID operation
8377 *
8378 * @server: server / transport on which to perform the operation
8379 * @stateid: state ID to release
ab7cb0df 8380 * @cred: credential
38527b15
CL		 8381 *
8382 * Returns NFS_OK if the server freed "stateid". Otherwise a
8383 * negative NFS4ERR value is returned.
8384 */
ab7cb0df
TM		 8385static int nfs41_free_stateid(struct nfs_server *server,
8386 nfs4_stateid *stateid,
8387 struct rpc_cred *cred)
9aeda35f 8388{
7c1d5fae
TM		 8389 struct rpc_task *task;
8390 int ret;
8391
ab7cb0df 8392 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8393 if (IS_ERR(task))
8394 return PTR_ERR(task);
8395 ret = rpc_wait_for_completion_task(task);
8396 if (!ret)
8397 ret = task->tk_status;
8398 rpc_put_task(task);
8399 return ret;
9aeda35f 8400}
36281caa 8401
f1cdae87
JL		 8402static void
8403nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8404{
8405 struct rpc_task *task;
ab7cb0df 8406 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8407
ab7cb0df 8408 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8409 nfs4_free_lock_state(server, lsp);
8410 if (IS_ERR(task))
f1cdae87 8411 return;
c8b2d0bf 8412 rpc_put_task(task);
c8b2d0bf
TM		 8413}
8414
36281caa
TM		 8415static bool nfs41_match_stateid(const nfs4_stateid *s1,
8416 const nfs4_stateid *s2)
8417{
2d2f24ad 8418 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8419 return false;
8420
2d2f24ad 8421 if (s1->seqid == s2->seqid)
36281caa 8422 return true;
2d2f24ad 8423 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8424 return true;
8425
8426 return false;
8427}
8428
557134a3
AA		 8429#endif /* CONFIG_NFS_V4_1 */
8430
36281caa
TM		 8431static bool nfs4_match_stateid(const nfs4_stateid *s1,
8432 const nfs4_stateid *s2)
8433{
f597c537 8434 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8435}
8436
8437
17280175 8438static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8439 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8440 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8441 .recover_open = nfs4_open_reclaim,
8442 .recover_lock = nfs4_lock_reclaim,
591d71cb 8443 .establish_clid = nfs4_init_clientid,
05f4c350 8444 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8445};
8446
591d71cb 8447#if defined(CONFIG_NFS_V4_1)
17280175 8448static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8449 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8450 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8451 .recover_open = nfs4_open_reclaim,
8452 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8453 .establish_clid = nfs41_init_clientid,
fce5c838 8454 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8455 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8456};
8457#endif /* CONFIG_NFS_V4_1 */
8458
17280175 8459static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8460 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8461 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8462 .recover_open = nfs40_open_expired,
591d71cb
AA		 8463 .recover_lock = nfs4_lock_expired,
8464 .establish_clid = nfs4_init_clientid,
8465};
8466
8467#if defined(CONFIG_NFS_V4_1)
17280175 8468static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8469 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8470 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8471 .recover_open = nfs41_open_expired,
8472 .recover_lock = nfs41_lock_expired,
4d643d1d 8473 .establish_clid = nfs41_init_clientid,
1da177e4 8474};
591d71cb 8475#endif /* CONFIG_NFS_V4_1 */
1da177e4 8476
17280175 8477static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8478 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8479 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8480 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8481};
8482
8483#if defined(CONFIG_NFS_V4_1)
17280175 8484static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8485 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8486 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8487 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8488};
8489#endif
8490
ec011fe8 8491static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8492 .get_locations = _nfs40_proc_get_locations,
44c99933 8493 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8494};
8495
8496#if defined(CONFIG_NFS_V4_1)
8497static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8498 .get_locations = _nfs41_proc_get_locations,
44c99933 8499 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8500};
8501#endif /* CONFIG_NFS_V4_1 */
8502
97dc1359
TM		 8503static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8504 .minor_version = 0,
39c6daae
TM		 8505 .init_caps = NFS_CAP_READDIRPLUS
8506 | NFS_CAP_ATOMIC_OPEN
8507 | NFS_CAP_CHANGE_ATTR
8508 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8509 .init_client = nfs40_init_client,
8510 .shutdown_client = nfs40_shutdown_client,
36281caa 8511 .match_stateid = nfs4_match_stateid,
fca78d6d 8512 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8513 .free_lock_state = nfs4_release_lockowner,
63f5f796 8514 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8515 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8516 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8517 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8518 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8519 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8520};
8521
8522#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8523static struct nfs_seqid *
8524nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8525{
8526 return NULL;
8527}
8528
97dc1359
TM		 8529static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8530 .minor_version = 1,
39c6daae
TM		 8531 .init_caps = NFS_CAP_READDIRPLUS
8532 | NFS_CAP_ATOMIC_OPEN
8533 | NFS_CAP_CHANGE_ATTR
3b66486c 8534 | NFS_CAP_POSIX_LOCK
49f9a0fa 8535 | NFS_CAP_STATEID_NFSV41
e983120e 8536 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8537 .init_client = nfs41_init_client,
8538 .shutdown_client = nfs41_shutdown_client,
36281caa 8539 .match_stateid = nfs41_match_stateid,
fca78d6d 8540 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8541 .free_lock_state = nfs41_free_lock_state,
63f5f796 8542 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8543 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8544 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8545 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8546 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8547 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8548};
8549#endif
8550
42c2c424
SD		 8551#if defined(CONFIG_NFS_V4_2)
8552static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8553 .minor_version = 2,
7017310a
BS		 8554 .init_caps = NFS_CAP_READDIRPLUS
8555 | NFS_CAP_ATOMIC_OPEN
8556 | NFS_CAP_CHANGE_ATTR
8557 | NFS_CAP_POSIX_LOCK
8558 | NFS_CAP_STATEID_NFSV41
e983120e 8559 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8560 | NFS_CAP_ALLOCATE
624bd5b7 8561 | NFS_CAP_DEALLOCATE
e983120e 8562 | NFS_CAP_SEEK,
abf79bb3
CL		 8563 .init_client = nfs41_init_client,
8564 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8565 .match_stateid = nfs41_match_stateid,
8566 .find_root_sec = nfs41_find_root_sec,
7017310a 8567 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8568 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8569 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8570 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8571 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8572 .state_renewal_ops = &nfs41_state_renewal_ops,
8573};
8574#endif
8575
97dc1359
TM		 8576const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8577 [0] = &nfs_v4_0_minor_ops,
8578#if defined(CONFIG_NFS_V4_1)
8579 [1] = &nfs_v4_1_minor_ops,
8580#endif
42c2c424
SD		 8581#if defined(CONFIG_NFS_V4_2)
8582 [2] = &nfs_v4_2_minor_ops,
8583#endif
97dc1359
TM		 8584};
8585
17f26b12 8586static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8587 .create = nfs_create,
8588 .lookup = nfs_lookup,
8589 .atomic_open = nfs_atomic_open,
8590 .link = nfs_link,
8591 .unlink = nfs_unlink,
8592 .symlink = nfs_symlink,
8593 .mkdir = nfs_mkdir,
8594 .rmdir = nfs_rmdir,
8595 .mknod = nfs_mknod,
8596 .rename = nfs_rename,
8597 .permission = nfs_permission,
8598 .getattr = nfs_getattr,
8599 .setattr = nfs_setattr,
8600 .getxattr = generic_getxattr,
8601 .setxattr = generic_setxattr,
8602 .listxattr = generic_listxattr,
8603 .removexattr = generic_removexattr,
8604};
8605
92e1d5be 8606static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8607 .permission = nfs_permission,
8608 .getattr = nfs_getattr,
8609 .setattr = nfs_setattr,
64c2ce8b
AK		 8610 .getxattr = generic_getxattr,
8611 .setxattr = generic_setxattr,
8612 .listxattr = generic_listxattr,
8613 .removexattr = generic_removexattr,
6b3b5496
BF		 8614};
8615
509de811 8616const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8617 .version = 4, /* protocol version */
8618 .dentry_ops = &nfs4_dentry_operations,
8619 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8620 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8621 .file_ops = &nfs4_file_operations,
1da177e4 8622 .getroot = nfs4_proc_get_root,
281cad46 8623 .submount = nfs4_submount,
ff9099f2 8624 .try_mount = nfs4_try_mount,
1da177e4
LT		 8625 .getattr = nfs4_proc_getattr,
8626 .setattr = nfs4_proc_setattr,
8627 .lookup = nfs4_proc_lookup,
8628 .access = nfs4_proc_access,
8629 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8630 .create = nfs4_proc_create,
8631 .remove = nfs4_proc_remove,
8632 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8633 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8634 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8635 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8636 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8637 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8638 .link = nfs4_proc_link,
8639 .symlink = nfs4_proc_symlink,
8640 .mkdir = nfs4_proc_mkdir,
8641 .rmdir = nfs4_proc_remove,
8642 .readdir = nfs4_proc_readdir,
8643 .mknod = nfs4_proc_mknod,
8644 .statfs = nfs4_proc_statfs,
8645 .fsinfo = nfs4_proc_fsinfo,
8646 .pathconf = nfs4_proc_pathconf,
e9326dca 8647 .set_capabilities = nfs4_server_capabilities,
1da177e4 8648 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8649 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8650 .read_setup = nfs4_proc_read_setup,
ec06c096 8651 .read_done = nfs4_read_done,
1da177e4 8652 .write_setup = nfs4_proc_write_setup,
788e7a89 8653 .write_done = nfs4_write_done,
1da177e4 8654 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8655 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8656 .commit_done = nfs4_commit_done,
1da177e4 8657 .lock = nfs4_proc_lock,
e50a1c2e 8658 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8659 .close_context = nfs4_close_context,
2b484297 8660 .open_context = nfs4_atomic_open,
011e2a7f 8661 .have_delegation = nfs4_have_delegation,
57ec14c5 8662 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8663 .alloc_client = nfs4_alloc_client,
45a52a02 8664 .init_client = nfs4_init_client,
cdb7eced 8665 .free_client = nfs4_free_client,
1179acc6
BS		 8666 .create_server = nfs4_create_server,
8667 .clone_server = nfs_clone_server,
1da177e4
LT		 8668};
8669
64c2ce8b
AK		 8670static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8671 .prefix = XATTR_NAME_NFSV4_ACL,
8672 .list = nfs4_xattr_list_nfs4_acl,
8673 .get = nfs4_xattr_get_nfs4_acl,
8674 .set = nfs4_xattr_set_nfs4_acl,
8675};
8676
8677const struct xattr_handler *nfs4_xattr_handlers[] = {
8678 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8679#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8680 &nfs4_xattr_nfs4_label_handler,
8681#endif
64c2ce8b
AK		 8682 NULL
8683};
8684
1da177e4
LT		 8685/*
8686 * Local variables:
8687 * c-basic-offset: 8
8688 * End:
8689 */
Linux 6.x block layer and io_uring tree(s)