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NFSv4.2/flexfiles: Fix a typo in the flexfiles layoutstats code
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
5ba12443
TM		 359 case -NFS4ERR_DELEG_REVOKED:
360 case -NFS4ERR_ADMIN_REVOKED:
361 case -NFS4ERR_BAD_STATEID:
011e2a7f 362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 363 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 364 exception->retry = 1;
365 return 0;
366 }
367 if (state == NULL)
368 break;
5d422301
TM		 369 ret = nfs4_schedule_stateid_recovery(server, state);
370 if (ret < 0)
371 break;
3114ea7a 372 goto wait_on_recovery;
0ced63d1 373 case -NFS4ERR_EXPIRED:
5d422301
TM		 374 if (state != NULL) {
375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
378 }
65de872e 379 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 380 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 381 nfs4_schedule_lease_recovery(clp);
382 goto wait_on_recovery;
519ae255
CL		 383 case -NFS4ERR_MOVED:
384 ret = nfs4_schedule_migration_recovery(server);
385 if (ret < 0)
386 break;
387 goto wait_on_recovery;
8ef2f8d4
CL		 388 case -NFS4ERR_LEASE_MOVED:
389 nfs4_schedule_lease_moved_recovery(clp);
390 goto wait_on_recovery;
03391693 391#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 392 case -NFS4ERR_BADSESSION:
393 case -NFS4ERR_BADSLOT:
394 case -NFS4ERR_BAD_HIGH_SLOT:
395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
396 case -NFS4ERR_DEADSESSION:
397 case -NFS4ERR_SEQ_FALSE_RETRY:
398 case -NFS4ERR_SEQ_MISORDERED:
399 dprintk("%s ERROR: %d Reset session\n", __func__,
400 errorcode);
9f594791 401 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 402 goto wait_on_recovery;
03391693 403#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 404 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 405 if (exception->timeout > HZ) {
406 /* We have retried a decent amount, time to
407 * fail
408 */
409 ret = -EBUSY;
410 break;
411 }
65de872e
TM		 412 case -NFS4ERR_GRACE:
413 case -NFS4ERR_DELAY:
414 ret = nfs4_delay(server->client, &exception->timeout);
415 if (ret != 0)
416 break;
a8a4ae3a 417 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 418 case -NFS4ERR_OLD_STATEID:
419 exception->retry = 1;
b064eca2
TM		 420 break;
421 case -NFS4ERR_BADOWNER:
422 /* The following works around a Linux server bug! */
423 case -NFS4ERR_BADNAME:
424 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
425 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
426 exception->retry = 1;
427 printk(KERN_WARNING "NFS: v4 server %s "
428 "does not accept raw "
429 "uid/gids. "
430 "Reenabling the idmapper.\n",
431 server->nfs_client->cl_hostname);
432 }
65de872e
TM		 433 }
434 /* We failed to handle the error */
435 return nfs4_map_errors(ret);
0400a6b0 436wait_on_recovery:
a2c0b9e2 437 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 438 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
439 return -EIO;
a2c0b9e2
TM		 440 if (ret == 0)
441 exception->retry = 1;
442 return ret;
65de872e
TM		 443}
444
a5250def
WAA		 445/*
446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
447 * or 'false' otherwise.
448 */
449static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
450{
451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
452
453 if (flavor == RPC_AUTH_GSS_KRB5I ||
454 flavor == RPC_AUTH_GSS_KRB5P)
455 return true;
456
457 return false;
458}
65de872e 459
452e9352 460static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 461{
1da177e4
LT		 462 spin_lock(&clp->cl_lock);
463 if (time_before(clp->cl_last_renewal,timestamp))
464 clp->cl_last_renewal = timestamp;
465 spin_unlock(&clp->cl_lock);
466}
467
452e9352
TM		 468static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
469{
be824167
TM		 470 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
452e9352
TM		 474}
475
2a3eb2b9
CL		 476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
be3a5d23
TM		 482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
cb04ad2a
PT		 497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
3bd2384a 501{
3bd2384a
CL		 502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
cb04ad2a 536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
cab92c19 544 if (slot == NULL)
3bd2384a
CL		 545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
cccef3b9
AA		 558#if defined(CONFIG_NFS_V4_1)
559
d185a334 560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 561{
e3725ec0 562 struct nfs4_session *session;
13615871 563 struct nfs4_slot_table *tbl;
a13ce7c6 564 struct nfs4_slot *slot = res->sr_slot;
c10e4498 565 bool send_new_highest_used_slotid = false;
13615871 566
a13ce7c6 567 tbl = slot->table;
e3725ec0 568 session = tbl->session;
ea028ac9 569
35dc1d74 570 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
a13ce7c6 577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
a13ce7c6 581 nfs4_free_slot(tbl, slot);
c10e4498
TM		 582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
b75ad4cd 585out_unlock:
35dc1d74 586 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 587 res->sr_slot = NULL;
c10e4498
TM		 588 if (send_new_highest_used_slotid)
589 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 590}
591
f9c96fcc 592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 593{
e3725ec0 594 struct nfs4_session *session;
a13ce7c6 595 struct nfs4_slot *slot = res->sr_slot;
14516c3a 596 struct nfs_client *clp;
ac20d163 597 bool interrupted = false;
85563073 598 int ret = 1;
b0df806c 599
a13ce7c6
TM		 600 if (slot == NULL)
601 goto out_noaction;
468f8613
BS		 602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
b0df806c
AA		 604 goto out;
605
e3725ec0 606 session = slot->table->session;
933602e3 607
ac20d163
TM		 608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
2f92ae34 613 trace_nfs4_sequence_done(session, res);
691daf3b 614 /* Check the SEQUENCE operation status */
14516c3a
TM		 615 switch (res->sr_status) {
616 case 0:
b0df806c 617 /* Update the slot's sequence and clientid lease timer */
933602e3 618 ++slot->seq_nr;
e3725ec0 619 clp = session->clp;
8e63b6a8 620 do_renew_lease(clp, res->sr_timestamp);
0629e370 621 /* Check sequence flags */
b15c7cdd 622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 623 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 624 break;
ac20d163
TM		 625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
14516c3a
TM		 634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
df2fabff 639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 640 __func__,
df2fabff 641 slot->slot_nr,
933602e3 642 slot->seq_nr);
14516c3a 643 goto out_retry;
85563073
TM		 644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
e8794440
TM		 649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
e8794440
TM		 659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
8e63b6a8
TM		 663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
e8794440
TM		 668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
14516c3a
TM		 671 default:
672 /* Just update the slot sequence no. */
933602e3 673 ++slot->seq_nr;
b0df806c
AA		 674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 678 nfs41_sequence_free_slot(res);
a13ce7c6 679out_noaction:
85563073 680 return ret;
e8794440
TM		 681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
14516c3a 687out_retry:
d05dd4e9 688 if (!rpc_restart_call(task))
14516c3a
TM		 689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
b0df806c 692}
f9c96fcc 693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 694
2c4b131d 695int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455 702}
2c4b131d 703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 704
dc70d7b3 705int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
ce5039c1
AA		 708 struct rpc_task *task)
709{
fbcd4abc
AA		 710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 712
713 dprintk("--> %s\n", __func__);
ce5039c1 714 /* slot already allocated? */
dfb4f309 715 if (res->sr_slot != NULL)
d9afbd1b 716 goto out_success;
ce5039c1 717
fbcd4abc
AA		 718 tbl = &session->fc_slot_table;
719
69d206b5
TM		 720 task->tk_timeout = 0;
721
fbcd4abc 722 spin_lock(&tbl->slot_tbl_lock);
774d5f14 723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 724 !args->sa_privileged) {
0b1c8fc4 725 /* The state manager will wait until the slot table is empty */
0b1c8fc4 726 dprintk("%s session is draining\n", __func__);
7b939a3f 727 goto out_sleep;
689cf5c1
AB		 728 }
729
2dc03b7f 730 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
fbcd4abc 735 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 736 goto out_sleep;
fbcd4abc
AA		 737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
2b2fa717 740 args->sa_slot = slot;
fbcd4abc 741
e8d92382 742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 743 slot->slot_nr, slot->seq_nr);
fbcd4abc 744
dfb4f309 745 res->sr_slot = slot;
8e63b6a8 746 res->sr_timestamp = jiffies;
2a6e26cd 747 res->sr_status_flags = 0;
fbcd4abc
AA		 748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
2f92ae34 753 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 754out_success:
755 rpc_call_start(task);
ce5039c1 756 return 0;
7b939a3f 757out_sleep:
8fe72bac
TM		 758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
1e1093c7
TM		 760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
ce5039c1 766}
dc70d7b3 767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 768
5a580e0a
CL		 769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
ce5039c1 773{
035168ab 774 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 775 int ret = 0;
776
3bd2384a 777 if (!session)
cb04ad2a
PT		 778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
cb04ad2a
PT		 820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
9915ea7e
CL		 822}
823
2c4b131d
PT		 824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
9915ea7e 826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
2c4b131d 829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 830
831#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
7c513058
BS		 851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
ce5039c1
AA		 853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
8fe72bac 855 struct nfs4_sequence_res *res)
ce5039c1
AA		 856{
857 int ret;
858 struct rpc_task *task;
9915ea7e 859 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 860 struct nfs4_call_sync_data data = {
035168ab 861 .seq_server = server,
ce5039c1
AA		 862 .seq_args = args,
863 .seq_res = res,
ce5039c1
AA		 864 };
865 struct rpc_task_setup task_setup = {
7c513058 866 .rpc_client = clnt,
ce5039c1 867 .rpc_message = msg,
9915ea7e 868 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 869 .callback_data = &data
870 };
871
ce5039c1
AA		 872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
7c513058
BS		 882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
e73b83f2
BS		 884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
a9c92d6b 889 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 891}
cccef3b9 892
38478b24 893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 894{
38478b24 895 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 896
38478b24 897 spin_lock(&dir->i_lock);
359d7d1c 898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 899 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 900 nfs_force_lookup_revalidate(dir);
a9a4a87a 901 dir->i_version = cinfo->after;
3235b403 902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 903 nfs_fscache_invalidate(dir);
38478b24 904 spin_unlock(&dir->i_lock);
1da177e4
LT		 905}
906
e56e0b78 907struct nfs4_opendata {
c6d00e63 908 struct kref kref;
e56e0b78
TM		 909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
cdd4e68b
TM		 911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
6926afd1
TM		 913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
e56e0b78 915 struct nfs_fattr f_attr;
1775fd3e 916 struct nfs4_label *f_label;
e56e0b78 917 struct dentry *dir;
82a2c1b7 918 struct dentry *dentry;
e56e0b78 919 struct nfs4_state_owner *owner;
aac00a8d 920 struct nfs4_state *state;
e56e0b78 921 struct iattr attrs;
26e976a8 922 unsigned long timestamp;
3e309914 923 unsigned int rpc_done : 1;
5bc2afc2 924 unsigned int file_created : 1;
bdeca1b7 925 unsigned int is_recover : 1;
24ac23ab
TM		 926 int rpc_status;
927 int cancelled;
e56e0b78
TM		 928};
929
49f9a0fa
TM		 930static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
931 int err, struct nfs4_exception *exception)
932{
933 if (err != -EINVAL)
934 return false;
935 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
936 return false;
937 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
938 exception->retry = 1;
939 return true;
940}
941
6ae37339
TM		 942static u32
943nfs4_map_atomic_open_share(struct nfs_server *server,
944 fmode_t fmode, int openflags)
945{
946 u32 res = 0;
947
948 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
949 case FMODE_READ:
950 res = NFS4_SHARE_ACCESS_READ;
951 break;
952 case FMODE_WRITE:
953 res = NFS4_SHARE_ACCESS_WRITE;
954 break;
955 case FMODE_READ|FMODE_WRITE:
956 res = NFS4_SHARE_ACCESS_BOTH;
957 }
958 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
959 goto out;
960 /* Want no delegation if we're using O_DIRECT */
961 if (openflags & O_DIRECT)
962 res |= NFS4_SHARE_WANT_NO_DELEG;
963out:
964 return res;
965}
966
49f9a0fa
TM		 967static enum open_claim_type4
968nfs4_map_atomic_open_claim(struct nfs_server *server,
969 enum open_claim_type4 claim)
970{
971 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
972 return claim;
973 switch (claim) {
974 default:
975 return claim;
976 case NFS4_OPEN_CLAIM_FH:
977 return NFS4_OPEN_CLAIM_NULL;
978 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
979 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
980 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
981 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
982 }
983}
2ced46c2
TM		 984
985static void nfs4_init_opendata_res(struct nfs4_opendata *p)
986{
987 p->o_res.f_attr = &p->f_attr;
1775fd3e 988 p->o_res.f_label = p->f_label;
c1d51931
TM		 989 p->o_res.seqid = p->o_arg.seqid;
990 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 991 p->o_res.server = p->o_arg.server;
5f657530 992 p->o_res.access_request = p->o_arg.access;
2ced46c2 993 nfs_fattr_init(&p->f_attr);
6926afd1 994 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 995}
996
82a2c1b7 997static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 998 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 999 const struct iattr *attrs,
1775fd3e 1000 struct nfs4_label *label,
4a1c0893 1001 enum open_claim_type4 claim,
8535b2be 1002 gfp_t gfp_mask)
e56e0b78 1003{
82a2c1b7 1004 struct dentry *parent = dget_parent(dentry);
2b0143b5 1005 struct inode *dir = d_inode(parent);
e56e0b78 1006 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1007 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1008 struct nfs4_opendata *p;
1009
8535b2be 1010 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1011 if (p == NULL)
1012 goto err;
14c43f76
DQ		 1013
1014 p->f_label = nfs4_label_alloc(server, gfp_mask);
1015 if (IS_ERR(p->f_label))
1016 goto err_free_p;
1017
63f5f796
TM		 1018 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1019 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1020 if (IS_ERR(p->o_arg.seqid))
14c43f76 1021 goto err_free_label;
82a2c1b7
AV		 1022 nfs_sb_active(dentry->d_sb);
1023 p->dentry = dget(dentry);
e56e0b78
TM		 1024 p->dir = parent;
1025 p->owner = sp;
1026 atomic_inc(&sp->so_count);
dc0b027d
TM		 1027 p->o_arg.open_flags = flags;
1028 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1029 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1030 fmode, flags);
ae2bb032
WAA		 1031 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1032 * will return permission denied for all bits until close */
1033 if (!(flags & O_EXCL)) {
1034 /* ask server to check for all possible rights as results
1035 * are cached */
1036 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1037 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1038 }
7539bbab 1039 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1040 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1041 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1042 p->o_arg.name = &dentry->d_name;
e56e0b78 1043 p->o_arg.server = server;
aa9c2669 1044 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1045 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1046 p->o_arg.label = label;
49f9a0fa
TM		 1047 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1048 switch (p->o_arg.claim) {
4a1c0893
TM		 1049 case NFS4_OPEN_CLAIM_NULL:
1050 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1051 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1052 p->o_arg.fh = NFS_FH(dir);
1053 break;
1054 case NFS4_OPEN_CLAIM_PREVIOUS:
1055 case NFS4_OPEN_CLAIM_FH:
1056 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1057 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1058 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1059 }
536e43d1 1060 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1061 __u32 verf[2];
d77d76ff 1062
e56e0b78
TM		 1063 p->o_arg.u.attrs = &p->attrs;
1064 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1065
1066 verf[0] = jiffies;
1067 verf[1] = current->pid;
1068 memcpy(p->o_arg.u.verifier.data, verf,
1069 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1070 }
cdd4e68b
TM		 1071 p->c_arg.fh = &p->o_res.fh;
1072 p->c_arg.stateid = &p->o_res.stateid;
1073 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1074 nfs4_init_opendata_res(p);
c6d00e63 1075 kref_init(&p->kref);
e56e0b78 1076 return p;
14c43f76
DQ		 1077
1078err_free_label:
1079 nfs4_label_free(p->f_label);
1080err_free_p:
e56e0b78
TM		 1081 kfree(p);
1082err:
1083 dput(parent);
1084 return NULL;
1085}
1086
c6d00e63 1087static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1088{
c6d00e63
TM		 1089 struct nfs4_opendata *p = container_of(kref,
1090 struct nfs4_opendata, kref);
82a2c1b7 1091 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1092
1093 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1094 if (p->state != NULL)
1095 nfs4_put_open_state(p->state);
c6d00e63 1096 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1097
1098 nfs4_label_free(p->f_label);
1099
c6d00e63 1100 dput(p->dir);
82a2c1b7
AV		 1101 dput(p->dentry);
1102 nfs_sb_deactive(sb);
6926afd1 1103 nfs_fattr_free_names(&p->f_attr);
e911b815 1104 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1105 kfree(p);
1106}
1107
1108static void nfs4_opendata_put(struct nfs4_opendata *p)
1109{
1110 if (p != NULL)
1111 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1112}
1113
06f814a3
TM		 1114static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1115{
06f814a3
TM		 1116 int ret;
1117
06f814a3 1118 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1119 return ret;
1120}
1121
dc0b027d 1122static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1123{
1124 int ret = 0;
dc0b027d 1125
536e43d1 1126 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1127 goto out;
1128 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1129 case FMODE_READ:
88069f77
TM		 1130 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1131 && state->n_rdonly != 0;
6ee41268
TM		 1132 break;
1133 case FMODE_WRITE:
88069f77
TM		 1134 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1135 && state->n_wronly != 0;
6ee41268
TM		 1136 break;
1137 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1138 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1139 && state->n_rdwr != 0;
6ee41268 1140 }
dc0b027d 1141out:
6ee41268
TM		 1142 return ret;
1143}
1144
dc0b027d 1145static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1146{
652f89f6
TM		 1147 if (delegation == NULL)
1148 return 0;
dc0b027d 1149 if ((delegation->type & fmode) != fmode)
aac00a8d 1150 return 0;
d25be546
TM		 1151 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1152 return 0;
b7391f44 1153 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1154 return 1;
1155}
1156
dc0b027d 1157static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1158{
dc0b027d 1159 switch (fmode) {
e7616923
TM		 1160 case FMODE_WRITE:
1161 state->n_wronly++;
1162 break;
1163 case FMODE_READ:
1164 state->n_rdonly++;
1165 break;
1166 case FMODE_READ|FMODE_WRITE:
1167 state->n_rdwr++;
1168 }
dc0b027d 1169 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1170}
1171
4f14c194
TM		 1172static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1173{
1174 struct nfs_client *clp = state->owner->so_server->nfs_client;
1175 bool need_recover = false;
1176
1177 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1178 need_recover = true;
1179 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1180 need_recover = true;
1181 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1182 need_recover = true;
1183 if (need_recover)
1184 nfs4_state_mark_reclaim_nograce(clp, state);
1185}
1186
e999e80e
TM		 1187static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1188 nfs4_stateid *stateid)
1189{
1190 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1191 return true;
4f14c194
TM		 1192 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1193 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1194 return true;
4f14c194 1195 }
e999e80e
TM		 1196 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1197 return true;
1198 return false;
1199}
1200
f95549cf
TM		 1201static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1202{
1203 if (state->n_wronly)
1204 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1205 if (state->n_rdonly)
1206 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1207 if (state->n_rdwr)
1208 set_bit(NFS_O_RDWR_STATE, &state->flags);
1209}
1210
226056c5
TM		 1211static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1212 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1213{
226056c5
TM		 1214 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1215 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1216 case FMODE_WRITE:
1217 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1218 break;
1219 case FMODE_READ:
1220 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1221 break;
1222 case 0:
1223 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1224 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1225 clear_bit(NFS_OPEN_STATE, &state->flags);
1226 }
1227 if (stateid == NULL)
1228 return;
f95549cf
TM		 1229 /* Handle races with OPEN */
1230 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1231 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1232 nfs_resync_open_stateid_locked(state);
226056c5 1233 return;
f95549cf 1234 }
003707c7 1235 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1236 nfs4_stateid_copy(&state->stateid, stateid);
1237 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1238}
1239
1240static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1241{
1242 write_seqlock(&state->seqlock);
1243 nfs_clear_open_stateid_locked(state, stateid, fmode);
1244 write_sequnlock(&state->seqlock);
4f14c194
TM		 1245 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1246 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1247}
1248
dc0b027d 1249static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1250{
dc0b027d 1251 switch (fmode) {
003707c7
TM		 1252 case FMODE_READ:
1253 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1254 break;
1255 case FMODE_WRITE:
1256 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1257 break;
1258 case FMODE_READ|FMODE_WRITE:
1259 set_bit(NFS_O_RDWR_STATE, &state->flags);
1260 }
e999e80e
TM		 1261 if (!nfs_need_update_open_stateid(state, stateid))
1262 return;
1263 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1264 nfs4_stateid_copy(&state->stateid, stateid);
1265 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1266}
1267
dc0b027d 1268static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1269{
8bda4e4c
TM		 1270 /*
1271 * Protect the call to nfs4_state_set_mode_locked and
1272 * serialise the stateid update
1273 */
1274 write_seqlock(&state->seqlock);
003707c7 1275 if (deleg_stateid != NULL) {
f597c537 1276 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1277 set_bit(NFS_DELEGATED_STATE, &state->flags);
1278 }
1279 if (open_stateid != NULL)
dc0b027d 1280 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1281 write_sequnlock(&state->seqlock);
1282 spin_lock(&state->owner->so_lock);
dc0b027d 1283 update_open_stateflags(state, fmode);
ec073428 1284 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1285}
1286
dc0b027d 1287static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1288{
1289 struct nfs_inode *nfsi = NFS_I(state->inode);
1290 struct nfs_delegation *deleg_cur;
1291 int ret = 0;
1292
dc0b027d 1293 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1294
1295 rcu_read_lock();
1296 deleg_cur = rcu_dereference(nfsi->delegation);
1297 if (deleg_cur == NULL)
1298 goto no_delegation;
1299
1300 spin_lock(&deleg_cur->lock);
17f26b12 1301 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1302 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1303 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1304 goto no_delegation_unlock;
1305
1306 if (delegation == NULL)
1307 delegation = &deleg_cur->stateid;
f597c537 1308 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1309 goto no_delegation_unlock;
1310
b7391f44 1311 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1312 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1313 ret = 1;
1314no_delegation_unlock:
1315 spin_unlock(&deleg_cur->lock);
1316no_delegation:
1317 rcu_read_unlock();
1318
1319 if (!ret && open_stateid != NULL) {
dc0b027d 1320 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1321 ret = 1;
1322 }
4f14c194
TM		 1323 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1324 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1325
1326 return ret;
1327}
1328
39071e6f
TM		 1329static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1330 const nfs4_stateid *stateid)
1331{
1332 struct nfs4_state *state = lsp->ls_state;
1333 bool ret = false;
1334
1335 spin_lock(&state->state_lock);
1336 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1337 goto out_noupdate;
1338 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1339 goto out_noupdate;
1340 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1341 ret = true;
1342out_noupdate:
1343 spin_unlock(&state->state_lock);
1344 return ret;
1345}
34310430 1346
dc0b027d 1347static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1348{
1349 struct nfs_delegation *delegation;
1350
1351 rcu_read_lock();
1352 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1353 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1354 rcu_read_unlock();
1355 return;
1356 }
1357 rcu_read_unlock();
57ec14c5 1358 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1359}
1360
6ee41268 1361static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1362{
1363 struct nfs4_state *state = opendata->state;
1364 struct nfs_inode *nfsi = NFS_I(state->inode);
1365 struct nfs_delegation *delegation;
f448badd 1366 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1367 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1368 nfs4_stateid stateid;
1369 int ret = -EAGAIN;
1370
aac00a8d 1371 for (;;) {
61beef75 1372 spin_lock(&state->owner->so_lock);
dc0b027d 1373 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1374 update_open_stateflags(state, fmode);
6ee41268 1375 spin_unlock(&state->owner->so_lock);
61beef75 1376 goto out_return_state;
6ee41268 1377 }
61beef75 1378 spin_unlock(&state->owner->so_lock);
34310430
TM		 1379 rcu_read_lock();
1380 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1381 if (!can_open_delegated(delegation, fmode)) {
34310430 1382 rcu_read_unlock();
aac00a8d 1383 break;
34310430 1384 }
aac00a8d 1385 /* Save the delegation */
f597c537 1386 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1387 rcu_read_unlock();
fa332941 1388 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1389 if (!opendata->is_recover) {
1390 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1391 if (ret != 0)
1392 goto out;
1393 }
aac00a8d 1394 ret = -EAGAIN;
34310430
TM		 1395
1396 /* Try to update the stateid using the delegation */
dc0b027d 1397 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1398 goto out_return_state;
aac00a8d 1399 }
aac00a8d
TM		 1400out:
1401 return ERR_PTR(ret);
1402out_return_state:
1403 atomic_inc(&state->count);
1404 return state;
1405}
1406
e23008ec
AA		 1407static void
1408nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1409{
1410 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1411 struct nfs_delegation *delegation;
1412 int delegation_flags = 0;
1413
1414 rcu_read_lock();
1415 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1416 if (delegation)
1417 delegation_flags = delegation->flags;
1418 rcu_read_unlock();
1419 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1420 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1421 "returning a delegation for "
1422 "OPEN(CLAIM_DELEGATE_CUR)\n",
1423 clp->cl_hostname);
1424 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1425 nfs_inode_set_delegation(state->inode,
1426 data->owner->so_cred,
1427 &data->o_res);
1428 else
1429 nfs_inode_reclaim_delegation(state->inode,
1430 data->owner->so_cred,
1431 &data->o_res);
1432}
1433
1434/*
1435 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1436 * and update the nfs4_state.
1437 */
1438static struct nfs4_state *
1439_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1440{
1441 struct inode *inode = data->state->inode;
1442 struct nfs4_state *state = data->state;
1443 int ret;
1444
d2bfda2e
WAA		 1445 if (!data->rpc_done) {
1446 if (data->rpc_status) {
1447 ret = data->rpc_status;
1448 goto err;
1449 }
1450 /* cached opens have already been processed */
1451 goto update;
e23008ec
AA		 1452 }
1453
e23008ec
AA		 1454 ret = nfs_refresh_inode(inode, &data->f_attr);
1455 if (ret)
1456 goto err;
1457
1458 if (data->o_res.delegation_type != 0)
1459 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1460update:
e23008ec
AA		 1461 update_open_stateid(state, &data->o_res.stateid, NULL,
1462 data->o_arg.fmode);
d49f042a 1463 atomic_inc(&state->count);
e23008ec
AA		 1464
1465 return state;
1466err:
1467 return ERR_PTR(ret);
1468
1469}
1470
1471static struct nfs4_state *
1472_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1473{
1474 struct inode *inode;
1475 struct nfs4_state *state = NULL;
1b370bc2 1476 int ret;
24ac23ab 1477
aac00a8d 1478 if (!data->rpc_done) {
6ee41268 1479 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1480 goto out;
1481 }
1482
1b370bc2 1483 ret = -EAGAIN;
24ac23ab 1484 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1485 goto err;
1775fd3e 1486 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1487 ret = PTR_ERR(inode);
03f28e3a 1488 if (IS_ERR(inode))
1b370bc2
TM		 1489 goto err;
1490 ret = -ENOMEM;
24ac23ab
TM		 1491 state = nfs4_get_open_state(inode, data->owner);
1492 if (state == NULL)
1b370bc2 1493 goto err_put_inode;
e23008ec
AA		 1494 if (data->o_res.delegation_type != 0)
1495 nfs4_opendata_check_deleg(data, state);
34310430 1496 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1497 data->o_arg.fmode);
24ac23ab 1498 iput(inode);
aac00a8d 1499out:
7aa262b5 1500 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1501 return state;
1b370bc2
TM		 1502err_put_inode:
1503 iput(inode);
1504err:
1505 return ERR_PTR(ret);
24ac23ab
TM		 1506}
1507
e23008ec
AA		 1508static struct nfs4_state *
1509nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1510{
1511 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1512 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1513 return _nfs4_opendata_to_nfs4_state(data);
1514}
1515
864472e9
TM		 1516static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1517{
1518 struct nfs_inode *nfsi = NFS_I(state->inode);
1519 struct nfs_open_context *ctx;
1520
1521 spin_lock(&state->inode->i_lock);
1522 list_for_each_entry(ctx, &nfsi->open_files, list) {
1523 if (ctx->state != state)
1524 continue;
1525 get_nfs_open_context(ctx);
1526 spin_unlock(&state->inode->i_lock);
1527 return ctx;
1528 }
1529 spin_unlock(&state->inode->i_lock);
1530 return ERR_PTR(-ENOENT);
1531}
1532
4a1c0893
TM		 1533static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1534 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1535{
1536 struct nfs4_opendata *opendata;
1537
4a1c0893 1538 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1539 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1540 if (opendata == NULL)
1541 return ERR_PTR(-ENOMEM);
1542 opendata->state = state;
1543 atomic_inc(&state->count);
1544 return opendata;
1545}
1546
dc0b027d 1547static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1548{
2ced46c2 1549 struct nfs4_state *newstate;
864472e9
TM		 1550 int ret;
1551
39f897fd
N		 1552 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1553 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1554 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1555 /* This mode can't have been delegated, so we must have
1556 * a valid open_stateid to cover it - not need to reclaim.
1557 */
1558 return 0;
dc0b027d
TM		 1559 opendata->o_arg.open_flags = 0;
1560 opendata->o_arg.fmode = fmode;
be36e185
TM		 1561 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1562 NFS_SB(opendata->dentry->d_sb),
1563 fmode, 0);
2ced46c2
TM		 1564 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1565 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1566 nfs4_init_opendata_res(opendata);
b257957e 1567 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1568 if (ret != 0)
1569 return ret;
2ced46c2 1570 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1571 if (IS_ERR(newstate))
1572 return PTR_ERR(newstate);
643168c2 1573 nfs4_close_state(newstate, fmode);
2ced46c2 1574 *res = newstate;
864472e9
TM		 1575 return 0;
1576}
1577
1578static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1579{
864472e9 1580 struct nfs4_state *newstate;
864472e9
TM		 1581 int ret;
1582
4f14c194
TM		 1583 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1584 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1585 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1586 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1587 /* memory barrier prior to reading state->n_* */
2ced46c2 1588 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1589 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1590 smp_rmb();
1591 if (state->n_rdwr != 0) {
2ced46c2 1592 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1593 if (ret != 0)
1594 return ret;
2ced46c2
TM		 1595 if (newstate != state)
1596 return -ESTALE;
864472e9
TM		 1597 }
1598 if (state->n_wronly != 0) {
2ced46c2 1599 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1600 if (ret != 0)
1601 return ret;
2ced46c2
TM		 1602 if (newstate != state)
1603 return -ESTALE;
864472e9
TM		 1604 }
1605 if (state->n_rdonly != 0) {
2ced46c2 1606 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1607 if (ret != 0)
1608 return ret;
2ced46c2
TM		 1609 if (newstate != state)
1610 return -ESTALE;
864472e9 1611 }
1ac7e2fd
TM		 1612 /*
1613 * We may have performed cached opens for all three recoveries.
1614 * Check if we need to update the current stateid.
1615 */
1616 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1617 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1618 write_seqlock(&state->seqlock);
1ac7e2fd 1619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1620 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1621 write_sequnlock(&state->seqlock);
1ac7e2fd 1622 }
864472e9
TM		 1623 return 0;
1624}
1625
1da177e4
LT		 1626/*
1627 * OPEN_RECLAIM:
1628 * reclaim state on the server after a reboot.
1da177e4 1629 */
539cd03a 1630static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1631{
1ac7e2fd 1632 struct nfs_delegation *delegation;
864472e9 1633 struct nfs4_opendata *opendata;
dc0b027d 1634 fmode_t delegation_type = 0;
1da177e4
LT		 1635 int status;
1636
4a1c0893
TM		 1637 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1638 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1639 if (IS_ERR(opendata))
1640 return PTR_ERR(opendata);
1ac7e2fd
TM		 1641 rcu_read_lock();
1642 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1643 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1644 delegation_type = delegation->type;
1ac7e2fd 1645 rcu_read_unlock();
864472e9
TM		 1646 opendata->o_arg.u.delegation_type = delegation_type;
1647 status = nfs4_open_recover(opendata, state);
c6d00e63 1648 nfs4_opendata_put(opendata);
1da177e4
LT		 1649 return status;
1650}
1651
539cd03a 1652static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1653{
1654 struct nfs_server *server = NFS_SERVER(state->inode);
1655 struct nfs4_exception exception = { };
1656 int err;
1657 do {
539cd03a 1658 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1659 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1660 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1661 continue;
168667c4 1662 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1663 break;
1664 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1665 } while (exception.retry);
1666 return err;
1667}
1668
864472e9
TM		 1669static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1670{
1671 struct nfs_open_context *ctx;
1672 int ret;
1673
1674 ctx = nfs4_state_find_open_context(state);
1675 if (IS_ERR(ctx))
91876b13 1676 return -EAGAIN;
539cd03a 1677 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1678 put_nfs_open_context(ctx);
1679 return ret;
1680}
1681
db4f2e63 1682static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1683{
be76b5b6
TM		 1684 switch (err) {
1685 default:
1686 printk(KERN_ERR "NFS: %s: unhandled error "
1687 "%d.\n", __func__, err);
1688 case 0:
1689 case -ENOENT:
8eee52af 1690 case -EAGAIN:
be76b5b6
TM		 1691 case -ESTALE:
1692 break;
1693 case -NFS4ERR_BADSESSION:
1694 case -NFS4ERR_BADSLOT:
1695 case -NFS4ERR_BAD_HIGH_SLOT:
1696 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1697 case -NFS4ERR_DEADSESSION:
1698 set_bit(NFS_DELEGATED_STATE, &state->flags);
1699 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1700 return -EAGAIN;
1701 case -NFS4ERR_STALE_CLIENTID:
1702 case -NFS4ERR_STALE_STATEID:
1703 set_bit(NFS_DELEGATED_STATE, &state->flags);
1704 case -NFS4ERR_EXPIRED:
1705 /* Don't recall a delegation if it was lost */
1706 nfs4_schedule_lease_recovery(server->nfs_client);
1707 return -EAGAIN;
352297b9
CL		 1708 case -NFS4ERR_MOVED:
1709 nfs4_schedule_migration_recovery(server);
1710 return -EAGAIN;
8ef2f8d4
CL		 1711 case -NFS4ERR_LEASE_MOVED:
1712 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1713 return -EAGAIN;
be76b5b6
TM		 1714 case -NFS4ERR_DELEG_REVOKED:
1715 case -NFS4ERR_ADMIN_REVOKED:
1716 case -NFS4ERR_BAD_STATEID:
db4f2e63 1717 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1718 nfs_inode_find_state_and_recover(state->inode,
1719 stateid);
1720 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1721 return -EAGAIN;
be76b5b6
TM		 1722 case -NFS4ERR_DELAY:
1723 case -NFS4ERR_GRACE:
1724 set_bit(NFS_DELEGATED_STATE, &state->flags);
1725 ssleep(1);
1726 return -EAGAIN;
db4f2e63
TM		 1727 case -ENOMEM:
1728 case -NFS4ERR_DENIED:
1729 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1730 return 0;
be76b5b6 1731 }
1da177e4
LT		 1732 return err;
1733}
1734
db4f2e63
TM		 1735int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1736{
1737 struct nfs_server *server = NFS_SERVER(state->inode);
1738 struct nfs4_opendata *opendata;
1739 int err;
1740
1741 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1742 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1743 if (IS_ERR(opendata))
1744 return PTR_ERR(opendata);
1745 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1746 err = nfs4_open_recover(opendata, state);
1747 nfs4_opendata_put(opendata);
1748 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1749}
1750
be05c860
CL		 1751static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1752{
1753 struct nfs4_opendata *data = calldata;
1754
cb04ad2a
PT		 1755 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1756 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1757}
1758
cdd4e68b
TM		 1759static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1760{
1761 struct nfs4_opendata *data = calldata;
1762
17ead6c8 1763 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1764
cdd4e68b 1765 data->rpc_status = task->tk_status;
26e976a8 1766 if (data->rpc_status == 0) {
f597c537 1767 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1768 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1769 renew_lease(data->o_res.server, data->timestamp);
3e309914 1770 data->rpc_done = 1;
26e976a8 1771 }
cdd4e68b
TM		 1772}
1773
1774static void nfs4_open_confirm_release(void *calldata)
1775{
1776 struct nfs4_opendata *data = calldata;
1777 struct nfs4_state *state = NULL;
1778
1779 /* If this request hasn't been cancelled, do nothing */
1780 if (data->cancelled == 0)
1781 goto out_free;
1782 /* In case of error, no cleanup! */
3e309914 1783 if (!data->rpc_done)
cdd4e68b 1784 goto out_free;
cdd4e68b 1785 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1786 if (!IS_ERR(state))
643168c2 1787 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1788out_free:
c6d00e63 1789 nfs4_opendata_put(data);
cdd4e68b
TM		 1790}
1791
1792static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1793 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1794 .rpc_call_done = nfs4_open_confirm_done,
1795 .rpc_release = nfs4_open_confirm_release,
1796};
1797
1798/*
1799 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1800 */
1801static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1802{
2b0143b5 1803 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1804 struct rpc_task *task;
5138fde0
TM		 1805 struct rpc_message msg = {
1806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1807 .rpc_argp = &data->c_arg,
1808 .rpc_resp = &data->c_res,
1809 .rpc_cred = data->owner->so_cred,
1810 };
c970aa85
TM		 1811 struct rpc_task_setup task_setup_data = {
1812 .rpc_client = server->client,
5138fde0 1813 .rpc_message = &msg,
c970aa85
TM		 1814 .callback_ops = &nfs4_open_confirm_ops,
1815 .callback_data = data,
101070ca 1816 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1817 .flags = RPC_TASK_ASYNC,
1818 };
1da177e4
LT		 1819 int status;
1820
17ead6c8 1821 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1822 kref_get(&data->kref);
3e309914
TM		 1823 data->rpc_done = 0;
1824 data->rpc_status = 0;
5138fde0 1825 data->timestamp = jiffies;
c970aa85 1826 task = rpc_run_task(&task_setup_data);
7a1218a2 1827 if (IS_ERR(task))
cdd4e68b 1828 return PTR_ERR(task);
cdd4e68b
TM		 1829 status = nfs4_wait_for_completion_rpc_task(task);
1830 if (status != 0) {
1831 data->cancelled = 1;
1832 smp_wmb();
1833 } else
1834 status = data->rpc_status;
e6b3c4db 1835 rpc_put_task(task);
1da177e4
LT		 1836 return status;
1837}
1838
24ac23ab 1839static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1840{
24ac23ab
TM		 1841 struct nfs4_opendata *data = calldata;
1842 struct nfs4_state_owner *sp = data->owner;
549b19cc 1843 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1844
24ac23ab 1845 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1846 goto out_wait;
aac00a8d
TM		 1847 /*
1848 * Check if we still need to send an OPEN call, or if we can use
1849 * a delegation instead.
1850 */
1851 if (data->state != NULL) {
1852 struct nfs_delegation *delegation;
1853
dc0b027d 1854 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1855 goto out_no_action;
aac00a8d
TM		 1856 rcu_read_lock();
1857 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1858 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1859 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1860 can_open_delegated(delegation, data->o_arg.fmode))
1861 goto unlock_no_action;
aac00a8d
TM		 1862 rcu_read_unlock();
1863 }
95b72eb0 1864 /* Update client id. */
549b19cc 1865 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1866 switch (data->o_arg.claim) {
1867 case NFS4_OPEN_CLAIM_PREVIOUS:
1868 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1869 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1870 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1871 case NFS4_OPEN_CLAIM_FH:
1872 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1873 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1874 }
26e976a8 1875 data->timestamp = jiffies;
035168ab 1876 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1877 &data->o_arg.seq_args,
2240a9e2
TM		 1878 &data->o_res.seq_res,
1879 task) != 0)
1880 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1881
1882 /* Set the create mode (note dependency on the session type) */
1883 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1884 if (data->o_arg.open_flags & O_EXCL) {
1885 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1886 if (nfs4_has_persistent_session(clp))
1887 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1888 else if (clp->cl_mvops->minor_version > 0)
1889 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1890 }
6ee41268 1891 return;
652f89f6
TM		 1892unlock_no_action:
1893 rcu_read_unlock();
6ee41268
TM		 1894out_no_action:
1895 task->tk_action = NULL;
c8da19b9 1896out_wait:
b75ad4cd 1897 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1898}
1899
24ac23ab
TM		 1900static void nfs4_open_done(struct rpc_task *task, void *calldata)
1901{
1902 struct nfs4_opendata *data = calldata;
1da177e4 1903
24ac23ab 1904 data->rpc_status = task->tk_status;
d898528c 1905
14516c3a
TM		 1906 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1907 return;
d898528c 1908
24ac23ab 1909 if (task->tk_status == 0) {
807d66d8
TM		 1910 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1911 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1912 case S_IFREG:
1913 break;
1914 case S_IFLNK:
24ac23ab 1915 data->rpc_status = -ELOOP;
6f926b5b
TM		 1916 break;
1917 case S_IFDIR:
24ac23ab 1918 data->rpc_status = -EISDIR;
6f926b5b
TM		 1919 break;
1920 default:
24ac23ab 1921 data->rpc_status = -ENOTDIR;
807d66d8 1922 }
6f926b5b 1923 }
26e976a8 1924 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1925 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1926 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1927 }
3e309914 1928 data->rpc_done = 1;
24ac23ab 1929}
6f926b5b 1930
24ac23ab
TM		 1931static void nfs4_open_release(void *calldata)
1932{
1933 struct nfs4_opendata *data = calldata;
1934 struct nfs4_state *state = NULL;
1935
1936 /* If this request hasn't been cancelled, do nothing */
1937 if (data->cancelled == 0)
1938 goto out_free;
1939 /* In case of error, no cleanup! */
3e309914 1940 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1941 goto out_free;
1942 /* In case we need an open_confirm, no cleanup! */
1943 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1944 goto out_free;
24ac23ab 1945 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1946 if (!IS_ERR(state))
643168c2 1947 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1948out_free:
c6d00e63 1949 nfs4_opendata_put(data);
24ac23ab
TM		 1950}
1951
1952static const struct rpc_call_ops nfs4_open_ops = {
1953 .rpc_call_prepare = nfs4_open_prepare,
1954 .rpc_call_done = nfs4_open_done,
1955 .rpc_release = nfs4_open_release,
1956};
1957
b257957e 1958static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1959{
2b0143b5 1960 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1961 struct nfs_server *server = NFS_SERVER(dir);
1962 struct nfs_openargs *o_arg = &data->o_arg;
1963 struct nfs_openres *o_res = &data->o_res;
1964 struct rpc_task *task;
5138fde0
TM		 1965 struct rpc_message msg = {
1966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1967 .rpc_argp = o_arg,
1968 .rpc_resp = o_res,
1969 .rpc_cred = data->owner->so_cred,
1970 };
c970aa85
TM		 1971 struct rpc_task_setup task_setup_data = {
1972 .rpc_client = server->client,
5138fde0 1973 .rpc_message = &msg,
c970aa85
TM		 1974 .callback_ops = &nfs4_open_ops,
1975 .callback_data = data,
101070ca 1976 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1977 .flags = RPC_TASK_ASYNC,
1978 };
24ac23ab
TM		 1979 int status;
1980
a9c92d6b 1981 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1982 kref_get(&data->kref);
3e309914
TM		 1983 data->rpc_done = 0;
1984 data->rpc_status = 0;
2ced46c2 1985 data->cancelled = 0;
bdeca1b7
TM		 1986 data->is_recover = 0;
1987 if (isrecover) {
8fe72bac 1988 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1989 data->is_recover = 1;
1990 }
c970aa85 1991 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1992 if (IS_ERR(task))
1993 return PTR_ERR(task);
1994 status = nfs4_wait_for_completion_rpc_task(task);
1995 if (status != 0) {
1996 data->cancelled = 1;
1997 smp_wmb();
1998 } else
1999 status = data->rpc_status;
2000 rpc_put_task(task);
2001
2002 return status;
2003}
2004
2005static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2006{
2b0143b5 2007 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2008 struct nfs_openres *o_res = &data->o_res;
2009 int status;
2010
2011 status = nfs4_run_open_task(data, 1);
2012 if (status != 0 || !data->rpc_done)
2013 return status;
2014
6926afd1
TM		 2015 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2016
b257957e
AB		 2017 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2018 status = _nfs4_proc_open_confirm(data);
2019 if (status != 0)
2020 return status;
2021 }
2022
2023 return status;
2024}
2025
f3792d63
TM		 2026/*
2027 * Additional permission checks in order to distinguish between an
2028 * open for read, and an open for execute. This works around the
2029 * fact that NFSv4 OPEN treats read and execute permissions as being
2030 * the same.
2031 * Note that in the non-execute case, we want to turn off permission
2032 * checking if we just created a new file (POSIX open() semantics).
2033 */
6168f62c
WAA		 2034static int nfs4_opendata_access(struct rpc_cred *cred,
2035 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2036 struct nfs4_state *state, fmode_t fmode,
2037 int openflags)
6168f62c
WAA		 2038{
2039 struct nfs_access_entry cache;
2040 u32 mask;
2041
2042 /* access call failed or for some reason the server doesn't
2043 * support any access modes -- defer access call until later */
2044 if (opendata->o_res.access_supported == 0)
2045 return 0;
2046
2047 mask = 0;
f3792d63
TM		 2048 /*
2049 * Use openflags to check for exec, because fmode won't
2050 * always have FMODE_EXEC set when file open for exec.
2051 */
f8d9a897
WAA		 2052 if (openflags & __FMODE_EXEC) {
2053 /* ONLY check for exec rights */
2054 mask = MAY_EXEC;
f3792d63 2055 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2056 mask = MAY_READ;
6168f62c
WAA		 2057
2058 cache.cred = cred;
2059 cache.jiffies = jiffies;
2060 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2061 nfs_access_add_cache(state->inode, &cache);
2062
bbd3a8ee 2063 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2064 return 0;
2065
2066 /* even though OPEN succeeded, access is denied. Close the file */
2067 nfs4_close_state(state, fmode);
998f40b5 2068 return -EACCES;
6168f62c
WAA		 2069}
2070
b257957e
AB		 2071/*
2072 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2073 */
2074static int _nfs4_proc_open(struct nfs4_opendata *data)
2075{
2b0143b5 2076 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2077 struct nfs_server *server = NFS_SERVER(dir);
2078 struct nfs_openargs *o_arg = &data->o_arg;
2079 struct nfs_openres *o_res = &data->o_res;
2080 int status;
2081
2082 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2083 if (!data->rpc_done)
2084 return status;
2085 if (status != 0) {
2086 if (status == -NFS4ERR_BADNAME &&
2087 !(o_arg->open_flags & O_CREAT))
2088 return -ENOENT;
24ac23ab 2089 return status;
08ef7bd3 2090 }
24ac23ab 2091
6926afd1
TM		 2092 nfs_fattr_map_and_free_names(server, &data->f_attr);
2093
5bc2afc2 2094 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2095 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2096 if (o_arg->open_flags & O_EXCL)
2097 data->file_created = 1;
2098 else if (o_res->cinfo.before != o_res->cinfo.after)
2099 data->file_created = 1;
2100 }
0df5dd4a
TM		 2101 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2102 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2103 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2104 status = _nfs4_proc_open_confirm(data);
1da177e4 2105 if (status != 0)
24ac23ab 2106 return status;
1da177e4
LT		 2107 }
2108 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2109 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2110 return 0;
1da177e4
LT		 2111}
2112
d83217c1
AA		 2113static int nfs4_recover_expired_lease(struct nfs_server *server)
2114{
2115 return nfs4_client_recover_expired_lease(server->nfs_client);
2116}
2117
1da177e4
LT		 2118/*
2119 * OPEN_EXPIRED:
2120 * reclaim state on the server after a network partition.
2121 * Assumes caller holds the appropriate lock
2122 */
539cd03a 2123static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2124{
e56e0b78 2125 struct nfs4_opendata *opendata;
864472e9 2126 int ret;
1da177e4 2127
4a1c0893 2128 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2129 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2130 if (IS_ERR(opendata))
2131 return PTR_ERR(opendata);
864472e9 2132 ret = nfs4_open_recover(opendata, state);
35d05778 2133 if (ret == -ESTALE)
3d4ff43d 2134 d_drop(ctx->dentry);
c6d00e63 2135 nfs4_opendata_put(opendata);
864472e9 2136 return ret;
1da177e4
LT		 2137}
2138
a9ed2e25 2139static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2140{
539cd03a 2141 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2142 struct nfs4_exception exception = { };
2143 int err;
2144
2145 do {
539cd03a 2146 err = _nfs4_open_expired(ctx, state);
42113a75 2147 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2148 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2149 continue;
a9ed2e25
TM		 2150 switch (err) {
2151 default:
2152 goto out;
2153 case -NFS4ERR_GRACE:
2154 case -NFS4ERR_DELAY:
2155 nfs4_handle_exception(server, err, &exception);
2156 err = 0;
2157 }
202b50dc 2158 } while (exception.retry);
a9ed2e25 2159out:
202b50dc
TM		 2160 return err;
2161}
2162
1da177e4
LT		 2163static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2164{
1da177e4 2165 struct nfs_open_context *ctx;
864472e9 2166 int ret;
1da177e4 2167
864472e9
TM		 2168 ctx = nfs4_state_find_open_context(state);
2169 if (IS_ERR(ctx))
91876b13 2170 return -EAGAIN;
539cd03a 2171 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2172 put_nfs_open_context(ctx);
2173 return ret;
1da177e4
LT		 2174}
2175
4dfd4f7a
TM		 2176static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2177{
2178 nfs_remove_bad_delegation(state->inode);
2179 write_seqlock(&state->seqlock);
2180 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2181 write_sequnlock(&state->seqlock);
2182 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2183}
2184
2185static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2186{
2187 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2188 nfs_finish_clear_delegation_stateid(state);
2189}
2190
2191static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2192{
2193 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2194 nfs40_clear_delegation_stateid(state);
2195 return nfs4_open_expired(sp, state);
2196}
2197
f062eb6c 2198#if defined(CONFIG_NFS_V4_1)
0c116cad 2199static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2200{
f062eb6c 2201 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2202 nfs4_stateid stateid;
ab7cb0df 2203 struct nfs_delegation *delegation;
0c116cad
TM		 2204 struct rpc_cred *cred;
2205 int status;
3e60ffdd 2206
ab7cb0df
TM		 2207 /* Get the delegation credential for use by test/free_stateid */
2208 rcu_read_lock();
2209 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2210 if (delegation == NULL) {
ab7cb0df 2211 rcu_read_unlock();
0c116cad
TM		 2212 return;
2213 }
2214
2215 nfs4_stateid_copy(&stateid, &delegation->stateid);
2216 cred = get_rpccred(delegation->cred);
2217 rcu_read_unlock();
2218 status = nfs41_test_stateid(server, &stateid, cred);
2219 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2220
3e60ffdd
CL		 2221 if (status != NFS_OK) {
2222 /* Free the stateid unless the server explicitly
2223 * informs us the stateid is unrecognized. */
2224 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2225 nfs41_free_stateid(server, &stateid, cred);
2226 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2227 }
ab7cb0df 2228
0c116cad 2229 put_rpccred(cred);
3e60ffdd
CL		 2230}
2231
2232/**
2233 * nfs41_check_open_stateid - possibly free an open stateid
2234 *
2235 * @state: NFSv4 state for an inode
2236 *
2237 * Returns NFS_OK if recovery for this stateid is now finished.
2238 * Otherwise a negative NFS4ERR value is returned.
2239 */
2240static int nfs41_check_open_stateid(struct nfs4_state *state)
2241{
2242 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2243 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2244 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2245 int status;
2246
2247 /* If a state reset has been done, test_stateid is unneeded */
2248 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2249 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2250 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2251 return -NFS4ERR_BAD_STATEID;
2252
ab7cb0df 2253 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2254 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2255 if (status != NFS_OK) {
2256 /* Free the stateid unless the server explicitly
2257 * informs us the stateid is unrecognized. */
2258 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2259 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2260
2261 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2262 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2263 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2264 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2265 }
2266 return status;
2267}
2268
2269static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2270{
eb64cf96 2271 int status;
b01dd1d8 2272
0c116cad 2273 nfs41_check_delegation_stateid(state);
3e60ffdd 2274 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2275 if (status != NFS_OK)
2276 status = nfs4_open_expired(sp, state);
2277 return status;
f062eb6c
BS		 2278}
2279#endif
2280
aa53ed54
JL		 2281/*
2282 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2283 * fields corresponding to attributes that were used to store the verifier.
2284 * Make sure we clobber those fields in the later setattr call
2285 */
2286static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2287{
2288 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2289 !(sattr->ia_valid & ATTR_ATIME_SET))
2290 sattr->ia_valid |= ATTR_ATIME;
2291
2292 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2293 !(sattr->ia_valid & ATTR_MTIME_SET))
2294 sattr->ia_valid |= ATTR_MTIME;
2295}
2296
c21443c2
TM		 2297static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2298 fmode_t fmode,
2299 int flags,
3efb9722 2300 struct nfs_open_context *ctx)
c21443c2
TM		 2301{
2302 struct nfs4_state_owner *sp = opendata->owner;
2303 struct nfs_server *server = sp->so_server;
275bb307 2304 struct dentry *dentry;
c21443c2
TM		 2305 struct nfs4_state *state;
2306 unsigned int seq;
2307 int ret;
2308
2309 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2310
2311 ret = _nfs4_proc_open(opendata);
dca78001 2312 if (ret != 0)
c21443c2
TM		 2313 goto out;
2314
2315 state = nfs4_opendata_to_nfs4_state(opendata);
2316 ret = PTR_ERR(state);
2317 if (IS_ERR(state))
2318 goto out;
2319 if (server->caps & NFS_CAP_POSIX_LOCK)
2320 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2321
275bb307 2322 dentry = opendata->dentry;
2b0143b5 2323 if (d_really_is_negative(dentry)) {
275bb307
TM		 2324 /* FIXME: Is this d_drop() ever needed? */
2325 d_drop(dentry);
2326 dentry = d_add_unique(dentry, igrab(state->inode));
2327 if (dentry == NULL) {
2328 dentry = opendata->dentry;
2329 } else if (dentry != ctx->dentry) {
2330 dput(ctx->dentry);
2331 ctx->dentry = dget(dentry);
2332 }
2333 nfs_set_verifier(dentry,
2b0143b5 2334 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2335 }
2336
c21443c2
TM		 2337 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2338 if (ret != 0)
2339 goto out;
2340
3efb9722 2341 ctx->state = state;
2b0143b5 2342 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2343 nfs_inode_attach_open_context(ctx);
2344 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2345 nfs4_schedule_stateid_recovery(server, state);
2346 }
c21443c2
TM		 2347out:
2348 return ret;
2349}
2350
1da177e4 2351/*
24ac23ab 2352 * Returns a referenced nfs4_state
1da177e4 2353 */
82be417a 2354static int _nfs4_do_open(struct inode *dir,
4197a055 2355 struct nfs_open_context *ctx,
82be417a
AA		 2356 int flags,
2357 struct iattr *sattr,
5bc2afc2
TM		 2358 struct nfs4_label *label,
2359 int *opened)
1da177e4
LT		 2360{
2361 struct nfs4_state_owner *sp;
2362 struct nfs4_state *state = NULL;
2363 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2364 struct nfs4_opendata *opendata;
4197a055
TM		 2365 struct dentry *dentry = ctx->dentry;
2366 struct rpc_cred *cred = ctx->cred;
2367 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2368 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2369 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2370 struct nfs4_label *olabel = NULL;
aac00a8d 2371 int status;
1da177e4
LT		 2372
2373 /* Protect against reboot recovery conflicts */
1da177e4 2374 status = -ENOMEM;
d1e284d5
TM		 2375 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2376 if (sp == NULL) {
1da177e4
LT		 2377 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2378 goto out_err;
2379 }
58d9714a
TM		 2380 status = nfs4_recover_expired_lease(server);
2381 if (status != 0)
b4454fe1 2382 goto err_put_state_owner;
2b0143b5
DH		 2383 if (d_really_is_positive(dentry))
2384 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2385 status = -ENOMEM;
2b0143b5 2386 if (d_really_is_positive(dentry))
49f9a0fa 2387 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2388 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2389 label, claim, GFP_KERNEL);
e56e0b78 2390 if (opendata == NULL)
95d35cb4 2391 goto err_put_state_owner;
1da177e4 2392
14c43f76
DQ		 2393 if (label) {
2394 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2395 if (IS_ERR(olabel)) {
2396 status = PTR_ERR(olabel);
2397 goto err_opendata_put;
2398 }
2399 }
2400
e911b815
TM		 2401 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2402 if (!opendata->f_attr.mdsthreshold) {
2403 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2404 if (!opendata->f_attr.mdsthreshold)
2405 goto err_free_label;
2406 }
1549210f 2407 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2408 }
2b0143b5
DH		 2409 if (d_really_is_positive(dentry))
2410 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2411
3efb9722 2412 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2413 if (status != 0)
14c43f76 2414 goto err_free_label;
3efb9722 2415 state = ctx->state;
6168f62c 2416
549b19cc
TM		 2417 if ((opendata->o_arg.open_flags & O_EXCL) &&
2418 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2419 nfs4_exclusive_attrset(opendata, sattr);
2420
2421 nfs_fattr_init(opendata->o_res.f_attr);
2422 status = nfs4_do_setattr(state->inode, cred,
2423 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2424 state, label, olabel);
2425 if (status == 0) {
f044636d
TM		 2426 nfs_setattr_update_inode(state->inode, sattr,
2427 opendata->o_res.f_attr);
aa9c2669 2428 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2429 }
0ab64e0e 2430 }
5bc2afc2
TM		 2431 if (opendata->file_created)
2432 *opened |= FILE_CREATED;
82be417a 2433
e911b815 2434 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2435 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2436 opendata->f_attr.mdsthreshold = NULL;
2437 }
82be417a 2438
14c43f76
DQ		 2439 nfs4_label_free(olabel);
2440
c6d00e63 2441 nfs4_opendata_put(opendata);
1da177e4 2442 nfs4_put_state_owner(sp);
1da177e4 2443 return 0;
14c43f76
DQ		 2444err_free_label:
2445 nfs4_label_free(olabel);
c6d00e63
TM		 2446err_opendata_put:
2447 nfs4_opendata_put(opendata);
e56e0b78
TM		 2448err_put_state_owner:
2449 nfs4_put_state_owner(sp);
1da177e4 2450out_err:
1da177e4
LT		 2451 return status;
2452}
2453
2454
82be417a 2455static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2456 struct nfs_open_context *ctx,
82be417a
AA		 2457 int flags,
2458 struct iattr *sattr,
5bc2afc2
TM		 2459 struct nfs4_label *label,
2460 int *opened)
1da177e4 2461{
49f9a0fa 2462 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2463 struct nfs4_exception exception = { };
2464 struct nfs4_state *res;
2465 int status;
2466
2467 do {
5bc2afc2 2468 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2469 res = ctx->state;
42113a75 2470 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2471 if (status == 0)
2472 break;
2473 /* NOTE: BAD_SEQID means the server and client disagree about the
2474 * book-keeping w.r.t. state-changing operations
2475 * (OPEN/CLOSE/LOCK/LOCKU...)
2476 * It is actually a sign of a bug on the client or on the server.
2477 *
2478 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2479 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2480 * have unhashed the old state_owner for us, and that we can
2481 * therefore safely retry using a new one. We should still warn
2482 * the user though...
2483 */
2484 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2485 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2486 " returned a bad sequence-id error!\n",
2487 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2488 exception.retry = 1;
2489 continue;
2490 }
550f5747
TM		 2491 /*
2492 * BAD_STATEID on OPEN means that the server cancelled our
2493 * state before it received the OPEN_CONFIRM.
2494 * Recover by retrying the request as per the discussion
2495 * on Page 181 of RFC3530.
2496 */
2497 if (status == -NFS4ERR_BAD_STATEID) {
2498 exception.retry = 1;
2499 continue;
2500 }
aac00a8d
TM		 2501 if (status == -EAGAIN) {
2502 /* We must have found a delegation */
2503 exception.retry = 1;
2504 continue;
2505 }
49f9a0fa
TM		 2506 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2507 continue;
2508 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2509 status, &exception));
2510 } while (exception.retry);
2511 return res;
2512}
2513
659bfcd6
TM		 2514static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2515 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2516 struct nfs4_state *state, struct nfs4_label *ilabel,
2517 struct nfs4_label *olabel)
1da177e4 2518{
3e4f6290 2519 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2520 struct nfs_setattrargs arg = {
3e4f6290 2521 .fh = NFS_FH(inode),
1da177e4
LT		 2522 .iap = sattr,
2523 .server = server,
2524 .bitmask = server->attr_bitmask,
1775fd3e 2525 .label = ilabel,
1da177e4
LT		 2526 };
2527 struct nfs_setattrres res = {
2528 .fattr = fattr,
1775fd3e 2529 .label = olabel,
1da177e4
LT		 2530 .server = server,
2531 };
2532 struct rpc_message msg = {
659bfcd6
TM		 2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2534 .rpc_argp = &arg,
2535 .rpc_resp = &res,
2536 .rpc_cred = cred,
1da177e4 2537 };
26e976a8 2538 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2539 fmode_t fmode;
2540 bool truncate;
65e4308d 2541 int status;
1da177e4 2542
aa9c2669
DQ		 2543 arg.bitmask = nfs4_bitmask(server, ilabel);
2544 if (ilabel)
2545 arg.bitmask = nfs4_bitmask(server, olabel);
2546
0e574af1 2547 nfs_fattr_init(fattr);
1da177e4 2548
ee3ae84e
TM		 2549 /* Servers should only apply open mode checks for file size changes */
2550 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2551 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2552
2553 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2554 /* Use that stateid */
0418dae1 2555 } else if (truncate && state != NULL) {
2a369153
TM		 2556 struct nfs_lockowner lockowner = {
2557 .l_owner = current->files,
2558 .l_pid = current->tgid,
2559 };
0418dae1
TM		 2560 if (!nfs4_valid_open_stateid(state))
2561 return -EBADF;
2562 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2563 &lockowner) == -EIO)
2564 return -EBADF;
08e9eac4 2565 } else
f597c537 2566 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2567
7c513058 2568 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2569 if (status == 0 && state != NULL)
2570 renew_lease(server, timestamp);
65e4308d 2571 return status;
1da177e4
LT		 2572}
2573
659bfcd6
TM		 2574static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2575 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2576 struct nfs4_state *state, struct nfs4_label *ilabel,
2577 struct nfs4_label *olabel)
1da177e4 2578{
3e4f6290 2579 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2580 struct nfs4_exception exception = {
2581 .state = state,
3114ea7a 2582 .inode = inode,
a1d0b5ee 2583 };
1da177e4
LT		 2584 int err;
2585 do {
1775fd3e 2586 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2587 trace_nfs4_setattr(inode, err);
451146be
TM		 2588 switch (err) {
2589 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2590 if (!(sattr->ia_valid & ATTR_SIZE)) {
2591 pr_warn_once("NFSv4: server %s is incorrectly "
2592 "applying open mode checks to "
2593 "a SETATTR that is not "
2594 "changing file size.\n",
2595 server->nfs_client->cl_hostname);
2596 }
451146be
TM		 2597 if (state && !(state->state & FMODE_WRITE)) {
2598 err = -EBADF;
2599 if (sattr->ia_valid & ATTR_OPEN)
2600 err = -EACCES;
2601 goto out;
2602 }
2603 }
2604 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2605 } while (exception.retry);
451146be 2606out:
1da177e4
LT		 2607 return err;
2608}
2609
2610struct nfs4_closedata {
2611 struct inode *inode;
2612 struct nfs4_state *state;
2613 struct nfs_closeargs arg;
2614 struct nfs_closeres res;
516a6af6 2615 struct nfs_fattr fattr;
26e976a8 2616 unsigned long timestamp;
f7e8917a
FI		 2617 bool roc;
2618 u32 roc_barrier;
1da177e4
LT		 2619};
2620
963d8fe5 2621static void nfs4_free_closedata(void *data)
9512135d 2622{
963d8fe5
TM		 2623 struct nfs4_closedata *calldata = data;
2624 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2625 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2626
f7e8917a
FI		 2627 if (calldata->roc)
2628 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2629 nfs4_put_open_state(calldata->state);
2630 nfs_free_seqid(calldata->arg.seqid);
9512135d 2631 nfs4_put_state_owner(sp);
322b2b90 2632 nfs_sb_deactive(sb);
9512135d
TM		 2633 kfree(calldata);
2634}
2635
963d8fe5 2636static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2637{
963d8fe5 2638 struct nfs4_closedata *calldata = data;
1da177e4 2639 struct nfs4_state *state = calldata->state;
1da177e4 2640 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2641 nfs4_stateid *res_stateid = NULL;
1da177e4 2642
a3ca5651 2643 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2644 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2645 return;
42113a75 2646 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2647 /* hmm. we are done with the inode, and in the process of freeing
2648 * the state_owner. we keep this around to process errors
2649 */
1da177e4
LT		 2650 switch (task->tk_status) {
2651 case 0:
412f6c4c
TM		 2652 res_stateid = &calldata->res.stateid;
2653 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2654 pnfs_roc_set_barrier(state->inode,
2655 calldata->roc_barrier);
26e976a8 2656 renew_lease(server, calldata->timestamp);
412f6c4c 2657 break;
69794ad7 2658 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2659 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2660 case -NFS4ERR_OLD_STATEID:
2661 case -NFS4ERR_BAD_STATEID:
1da177e4 2662 case -NFS4ERR_EXPIRED:
566fcec6 2663 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2664 &state->open_stateid)) {
566fcec6
TM		 2665 rpc_restart_call_prepare(task);
2666 goto out_release;
2667 }
dc0b027d 2668 if (calldata->arg.fmode == 0)
9e33bed5 2669 break;
1da177e4 2670 default:
8478eaa1 2671 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2672 rpc_restart_call_prepare(task);
69794ad7
TM		 2673 goto out_release;
2674 }
1da177e4 2675 }
412f6c4c 2676 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2677out_release:
72211dbe 2678 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2679 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2680 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2681}
2682
4ce70ada 2683static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2684{
4ce70ada 2685 struct nfs4_closedata *calldata = data;
9512135d 2686 struct nfs4_state *state = calldata->state;
7fdab069 2687 struct inode *inode = calldata->inode;
aee7af35 2688 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2689 int call_close = 0;
9512135d 2690
a3ca5651 2691 dprintk("%s: begin!\n", __func__);
963d8fe5 2692 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2693 goto out_wait;
003707c7 2694
88069f77 2695 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2696 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2697 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2698 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2699 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2700 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2701 /* Calculate the change in open mode */
cd9288ff 2702 calldata->arg.fmode = 0;
e7616923 2703 if (state->n_rdwr == 0) {
cd9288ff
TM		 2704 if (state->n_rdonly == 0)
2705 call_close |= is_rdonly;
2706 else if (is_rdonly)
2707 calldata->arg.fmode |= FMODE_READ;
2708 if (state->n_wronly == 0)
2709 call_close |= is_wronly;
2710 else if (is_wronly)
2711 calldata->arg.fmode |= FMODE_WRITE;
2712 } else if (is_rdwr)
2713 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2714
2715 if (calldata->arg.fmode == 0)
2716 call_close |= is_rdwr;
2717
5d422301
TM		 2718 if (!nfs4_valid_open_stateid(state))
2719 call_close = 0;
4cecb76f 2720 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2721
2722 if (!call_close) {
963d8fe5 2723 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2724 goto out_no_action;
9512135d 2725 }
88069f77 2726
f7e8917a 2727 if (calldata->arg.fmode == 0) {
88069f77 2728 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2729 if (calldata->roc &&
b9536ad5
AA		 2730 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2731 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2732 goto out_wait;
b9536ad5 2733 }
f7e8917a 2734 }
6ae37339
TM		 2735 calldata->arg.share_access =
2736 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2737 calldata->arg.fmode, 0);
88069f77 2738
516a6af6 2739 nfs_fattr_init(calldata->res.fattr);
26e976a8 2740 calldata->timestamp = jiffies;
7fdab069 2741 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2742 &calldata->arg.seq_args,
2743 &calldata->res.seq_res,
2240a9e2
TM		 2744 task) != 0)
2745 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2746 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2747 return;
2748out_no_action:
2749 task->tk_action = NULL;
2750out_wait:
2751 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2752}
2753
963d8fe5 2754static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2755 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2756 .rpc_call_done = nfs4_close_done,
2757 .rpc_release = nfs4_free_closedata,
2758};
2759
fe08c546
PT		 2760static bool nfs4_roc(struct inode *inode)
2761{
40dd4b7a 2762 if (!nfs_have_layout(inode))
fe08c546 2763 return false;
fe08c546
PT		 2764 return pnfs_roc(inode);
2765}
2766
1da177e4
LT		 2767/*
2768 * It is possible for data to be read/written from a mem-mapped file
2769 * after the sys_close call (which hits the vfs layer as a flush).
2770 * This means that we can't safely call nfsv4 close on a file until
2771 * the inode is cleared. This in turn means that we are not good
2772 * NFSv4 citizens - we do not indicate to the server to update the file's
2773 * share state even when we are done with one of the three share
2774 * stateid's in the inode.
2775 *
2776 * NOTE: Caller must be holding the sp->so_owner semaphore!
2777 */
1f7977c1 2778int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2779{
4a35bd41 2780 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2781 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2782 struct nfs4_closedata *calldata;
b39e625b
TM		 2783 struct nfs4_state_owner *sp = state->owner;
2784 struct rpc_task *task;
5138fde0
TM		 2785 struct rpc_message msg = {
2786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2787 .rpc_cred = state->owner->so_cred,
2788 };
c970aa85
TM		 2789 struct rpc_task_setup task_setup_data = {
2790 .rpc_client = server->client,
5138fde0 2791 .rpc_message = &msg,
c970aa85 2792 .callback_ops = &nfs4_close_ops,
101070ca 2793 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2794 .flags = RPC_TASK_ASYNC,
2795 };
9512135d 2796 int status = -ENOMEM;
1da177e4 2797
fa940720
WAA		 2798 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2799 &task_setup_data.rpc_client, &msg);
2800
8535b2be 2801 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2802 if (calldata == NULL)
9512135d 2803 goto out;
a9c92d6b 2804 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2805 calldata->inode = state->inode;
1da177e4 2806 calldata->state = state;
4a35bd41 2807 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2808 /* Serialization for the sequence id */
63f5f796
TM		 2809 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2810 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2811 if (IS_ERR(calldata->arg.seqid))
9512135d 2812 goto out_free_calldata;
dc0b027d 2813 calldata->arg.fmode = 0;
a65318bf 2814 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2815 calldata->res.fattr = &calldata->fattr;
c1d51931 2816 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2817 calldata->res.server = server;
fe08c546 2818 calldata->roc = nfs4_roc(state->inode);
643168c2 2819 nfs_sb_active(calldata->inode->i_sb);
9512135d 2820
1174dd1f
TM		 2821 msg.rpc_argp = &calldata->arg;
2822 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2823 task_setup_data.callback_data = calldata;
2824 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2825 if (IS_ERR(task))
2826 return PTR_ERR(task);
a49c3c77
TM		 2827 status = 0;
2828 if (wait)
2829 status = rpc_wait_for_completion_task(task);
b39e625b 2830 rpc_put_task(task);
a49c3c77 2831 return status;
9512135d
TM		 2832out_free_calldata:
2833 kfree(calldata);
2834out:
b39e625b
TM		 2835 nfs4_put_open_state(state);
2836 nfs4_put_state_owner(sp);
9512135d 2837 return status;
1da177e4
LT		 2838}
2839
2b484297 2840static struct inode *
5bc2afc2
TM		 2841nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2842 int open_flags, struct iattr *attr, int *opened)
1da177e4 2843{
1da177e4 2844 struct nfs4_state *state;
aa9c2669
DQ		 2845 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2846
2847 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2848
565277f6 2849 /* Protect against concurrent sillydeletes */
5bc2afc2 2850 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2851
2852 nfs4_label_release_security(label);
2853
f46e0bd3
TM		 2854 if (IS_ERR(state))
2855 return ERR_CAST(state);
275bb307 2856 return state->inode;
1da177e4
LT		 2857}
2858
1185a552 2859static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2860{
2861 if (ctx->state == NULL)
2862 return;
2863 if (is_sync)
643168c2 2864 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2865 else
643168c2 2866 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2867}
1da177e4 2868
b944dba3
TM		 2869#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2870#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2871#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2872
1da177e4
LT		 2873static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2874{
43652ad5
BH		 2875 struct nfs4_server_caps_arg args = {
2876 .fhandle = fhandle,
2877 };
1da177e4
LT		 2878 struct nfs4_server_caps_res res = {};
2879 struct rpc_message msg = {
2880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2881 .rpc_argp = &args,
1da177e4
LT		 2882 .rpc_resp = &res,
2883 };
2884 int status;
2885
7c513058 2886 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2887 if (status == 0) {
b944dba3
TM		 2888 /* Sanity check the server answers */
2889 switch (server->nfs_client->cl_minorversion) {
2890 case 0:
2891 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2892 res.attr_bitmask[2] = 0;
2893 break;
2894 case 1:
2895 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2896 break;
2897 case 2:
2898 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2899 }
1da177e4 2900 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2901 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2902 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2903 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2904 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2905 NFS_CAP_CTIME|NFS_CAP_MTIME|
2906 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2907 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2908 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2909 server->caps |= NFS_CAP_ACLS;
2910 if (res.has_links != 0)
2911 server->caps |= NFS_CAP_HARDLINKS;
2912 if (res.has_symlinks != 0)
2913 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2914 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2915 server->caps |= NFS_CAP_FILEID;
2916 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2917 server->caps |= NFS_CAP_MODE;
2918 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2919 server->caps |= NFS_CAP_NLINK;
2920 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2921 server->caps |= NFS_CAP_OWNER;
2922 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2923 server->caps |= NFS_CAP_OWNER_GROUP;
2924 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2925 server->caps |= NFS_CAP_ATIME;
2926 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2927 server->caps |= NFS_CAP_CTIME;
2928 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2929 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2930#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2931 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2932 server->caps |= NFS_CAP_SECURITY_LABEL;
2933#endif
2934 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2935 sizeof(server->attr_bitmask));
b944dba3 2936 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2937
a65318bf
TM		 2938 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2939 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2940 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2941 server->cache_consistency_bitmask[2] = 0;
1da177e4 2942 server->acl_bitmask = res.acl_bitmask;
264e6351 2943 server->fh_expire_type = res.fh_expire_type;
1da177e4 2944 }
cccef3b9 2945
1da177e4
LT		 2946 return status;
2947}
2948
55a97593 2949int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2950{
2951 struct nfs4_exception exception = { };
2952 int err;
2953 do {
2954 err = nfs4_handle_exception(server,
2955 _nfs4_server_capabilities(server, fhandle),
2956 &exception);
2957 } while (exception.retry);
2958 return err;
2959}
2960
2961static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2962 struct nfs_fsinfo *info)
2963{
aa9c2669 2964 u32 bitmask[3];
1da177e4 2965 struct nfs4_lookup_root_arg args = {
aa9c2669 2966 .bitmask = bitmask,
1da177e4
LT		 2967 };
2968 struct nfs4_lookup_res res = {
2969 .server = server,
0e574af1 2970 .fattr = info->fattr,
1da177e4
LT		 2971 .fh = fhandle,
2972 };
2973 struct rpc_message msg = {
2974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2975 .rpc_argp = &args,
2976 .rpc_resp = &res,
2977 };
008f55d0 2978
aa9c2669
DQ		 2979 bitmask[0] = nfs4_fattr_bitmap[0];
2980 bitmask[1] = nfs4_fattr_bitmap[1];
2981 /*
2982 * Process the label in the upcoming getfattr
2983 */
2984 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2985
0e574af1 2986 nfs_fattr_init(info->fattr);
7c513058 2987 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2988}
2989
2990static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2991 struct nfs_fsinfo *info)
2992{
2993 struct nfs4_exception exception = { };
2994 int err;
2995 do {
fb8a5ba8 2996 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2997 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2998 switch (err) {
2999 case 0:
3000 case -NFS4ERR_WRONGSEC:
05e9cfb4 3001 goto out;
fb8a5ba8
BS		 3002 default:
3003 err = nfs4_handle_exception(server, err, &exception);
3004 }
1da177e4 3005 } while (exception.retry);
05e9cfb4 3006out:
1da177e4
LT		 3007 return err;
3008}
3009
8f70e95f
BS		 3010static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3011 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3012{
c2190661
TM		 3013 struct rpc_auth_create_args auth_args = {
3014 .pseudoflavor = flavor,
3015 };
8f70e95f
BS		 3016 struct rpc_auth *auth;
3017 int ret;
3018
c2190661 3019 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3020 if (IS_ERR(auth)) {
75bc8821 3021 ret = -EACCES;
8f70e95f
BS		 3022 goto out;
3023 }
3024 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3025out:
3026 return ret;
3027}
3028
9a744ba3
CL		 3029/*
3030 * Retry pseudoroot lookup with various security flavors. We do this when:
3031 *
3032 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3033 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3034 *
3035 * Returns zero on success, or a negative NFS4ERR value, or a
3036 * negative errno value.
3037 */
801a16dc 3038static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3039 struct nfs_fsinfo *info)
1da177e4 3040{
9a744ba3
CL		 3041 /* Per 3530bis 15.33.5 */
3042 static const rpc_authflavor_t flav_array[] = {
3043 RPC_AUTH_GSS_KRB5P,
3044 RPC_AUTH_GSS_KRB5I,
3045 RPC_AUTH_GSS_KRB5,
c4eafe11 3046 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3047 RPC_AUTH_NULL,
3048 };
3049 int status = -EPERM;
3050 size_t i;
6a1a1e34 3051
4d4b69dd
WAA		 3052 if (server->auth_info.flavor_len > 0) {
3053 /* try each flavor specified by user */
3054 for (i = 0; i < server->auth_info.flavor_len; i++) {
3055 status = nfs4_lookup_root_sec(server, fhandle, info,
3056 server->auth_info.flavors[i]);
3057 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3058 continue;
3059 break;
3060 }
3061 } else {
3062 /* no flavors specified by user, try default list */
3063 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3064 status = nfs4_lookup_root_sec(server, fhandle, info,
3065 flav_array[i]);
3066 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3067 continue;
3068 break;
3069 }
8f70e95f 3070 }
9a744ba3 3071
fb8a5ba8
BS		 3072 /*
3073 * -EACCESS could mean that the user doesn't have correct permissions
3074 * to access the mount. It could also mean that we tried to mount
3075 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3076 * existing mount programs don't handle -EACCES very well so it should
3077 * be mapped to -EPERM instead.
3078 */
3079 if (status == -EACCES)
3080 status = -EPERM;
801a16dc
BS		 3081 return status;
3082}
3083
2ed4b95b
CL		 3084static int nfs4_do_find_root_sec(struct nfs_server *server,
3085 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3086{
3087 int mv = server->nfs_client->cl_minorversion;
3088 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3089}
3090
3091/**
3092 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3093 * @server: initialized nfs_server handle
3094 * @fhandle: we fill in the pseudo-fs root file handle
3095 * @info: we fill in an FSINFO struct
5e6b1990 3096 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3097 *
3098 * Returns zero on success, or a negative errno.
801a16dc 3099 */
3028eb2b 3100int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3101 struct nfs_fsinfo *info,
3102 bool auth_probe)
801a16dc 3103{
c7757074 3104 int status = 0;
2ed4b95b 3105
c7757074 3106 if (!auth_probe)
5e6b1990 3107 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3108
3109 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3110 status = nfs4_do_find_root_sec(server, fhandle, info);
3111
1da177e4
LT		 3112 if (status == 0)
3113 status = nfs4_server_capabilities(server, fhandle);
3114 if (status == 0)
3115 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3116
c12e87f4 3117 return nfs4_map_errors(status);
1da177e4
LT		 3118}
3119
bae36241
BS		 3120static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3121 struct nfs_fsinfo *info)
3122{
3123 int error;
3124 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3125 struct nfs4_label *label = NULL;
bae36241
BS		 3126
3127 error = nfs4_server_capabilities(server, mntfh);
3128 if (error < 0) {
3129 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3130 return error;
3131 }
3132
14c43f76
DQ		 3133 label = nfs4_label_alloc(server, GFP_KERNEL);
3134 if (IS_ERR(label))
3135 return PTR_ERR(label);
3136
1775fd3e 3137 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3138 if (error < 0) {
3139 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3140 goto err_free_label;
bae36241
BS		 3141 }
3142
3143 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3144 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3145 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3146
14c43f76
DQ		 3147err_free_label:
3148 nfs4_label_free(label);
3149
bae36241
BS		 3150 return error;
3151}
3152
6b97fd3d
MN		 3153/*
3154 * Get locations and (maybe) other attributes of a referral.
3155 * Note that we'll actually follow the referral later when
3156 * we detect fsid mismatch in inode revalidation
3157 */
f05d147f
BS		 3158static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3159 const struct qstr *name, struct nfs_fattr *fattr,
3160 struct nfs_fh *fhandle)
6b97fd3d
MN		 3161{
3162 int status = -ENOMEM;
3163 struct page *page = NULL;
3164 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3165
3166 page = alloc_page(GFP_KERNEL);
3167 if (page == NULL)
3168 goto out;
3169 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3170 if (locations == NULL)
3171 goto out;
3172
f05d147f 3173 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3174 if (status != 0)
3175 goto out;
519ae255
CL		 3176
3177 /*
3178 * If the fsid didn't change, this is a migration event, not a
3179 * referral. Cause us to drop into the exception handler, which
3180 * will kick off migration recovery.
3181 */
6b97fd3d 3182 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3183 dprintk("%s: server did not return a different fsid for"
3184 " a referral at %s\n", __func__, name->name);
519ae255 3185 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3186 goto out;
3187 }
533eb461
AA		 3188 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3189 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3190
533eb461 3191 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3192 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3193 memset(fhandle, 0, sizeof(struct nfs_fh));
3194out:
3195 if (page)
3196 __free_page(page);
5d7ca35a 3197 kfree(locations);
6b97fd3d
MN		 3198 return status;
3199}
3200
1775fd3e
DQ		 3201static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3202 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3203{
3204 struct nfs4_getattr_arg args = {
3205 .fh = fhandle,
3206 .bitmask = server->attr_bitmask,
3207 };
3208 struct nfs4_getattr_res res = {
3209 .fattr = fattr,
1775fd3e 3210 .label = label,
1da177e4
LT		 3211 .server = server,
3212 };
3213 struct rpc_message msg = {
3214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3215 .rpc_argp = &args,
3216 .rpc_resp = &res,
3217 };
aa9c2669
DQ		 3218
3219 args.bitmask = nfs4_bitmask(server, label);
3220
0e574af1 3221 nfs_fattr_init(fattr);
7c513058 3222 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3223}
3224
1775fd3e
DQ		 3225static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3226 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3227{
3228 struct nfs4_exception exception = { };
3229 int err;
3230 do {
b5f875a9
TM		 3231 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3232 trace_nfs4_getattr(server, fhandle, fattr, err);
3233 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3234 &exception);
3235 } while (exception.retry);
3236 return err;
3237}
3238
3239/*
3240 * The file is not closed if it is opened due to the a request to change
3241 * the size of the file. The open call will not be needed once the
3242 * VFS layer lookup-intents are implemented.
3243 *
3244 * Close is called when the inode is destroyed.
3245 * If we haven't opened the file for O_WRONLY, we
3246 * need to in the size_change case to obtain a stateid.
3247 *
3248 * Got race?
3249 * Because OPEN is always done by name in nfsv4, it is
3250 * possible that we opened a different file by the same
3251 * name. We can recognize this race condition, but we
3252 * can't do anything about it besides returning an error.
3253 *
3254 * This will be fixed with VFS changes (lookup-intent).
3255 */
3256static int
3257nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3258 struct iattr *sattr)
3259{
2b0143b5 3260 struct inode *inode = d_inode(dentry);
659bfcd6 3261 struct rpc_cred *cred = NULL;
d530838b 3262 struct nfs4_state *state = NULL;
14c43f76 3263 struct nfs4_label *label = NULL;
1da177e4
LT		 3264 int status;
3265
88ac815c
PT		 3266 if (pnfs_ld_layoutret_on_setattr(inode) &&
3267 sattr->ia_valid & ATTR_SIZE &&
3268 sattr->ia_size < i_size_read(inode))
24028672 3269 pnfs_commit_and_return_layout(inode);
8a1636c4 3270
0e574af1 3271 nfs_fattr_init(fattr);
1da177e4 3272
2669940d
AA		 3273 /* Deal with open(O_TRUNC) */
3274 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3275 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3276
3277 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3278 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3279 return 0;
3280
d530838b 3281 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3282 if (sattr->ia_valid & ATTR_FILE) {
3283 struct nfs_open_context *ctx;
3284
3285 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3286 if (ctx) {
3287 cred = ctx->cred;
3288 state = ctx->state;
3289 }
659bfcd6 3290 }
08e9eac4 3291
14c43f76
DQ		 3292 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3293 if (IS_ERR(label))
3294 return PTR_ERR(label);
3295
3296 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3297 if (status == 0) {
f044636d 3298 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3299 nfs_setsecurity(inode, fattr, label);
3300 }
14c43f76 3301 nfs4_label_free(label);
1da177e4
LT		 3302 return status;
3303}
3304
0c2e53f1
TM		 3305static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3306 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3307 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3308{
0c2e53f1 3309 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3310 int status;
3311 struct nfs4_lookup_arg args = {
3312 .bitmask = server->attr_bitmask,
0c2e53f1 3313 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3314 .name = name,
3315 };
3316 struct nfs4_lookup_res res = {
3317 .server = server,
3318 .fattr = fattr,
aa9c2669 3319 .label = label,
2b3de441
DH		 3320 .fh = fhandle,
3321 };
3322 struct rpc_message msg = {
3323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3324 .rpc_argp = &args,
3325 .rpc_resp = &res,
3326 };
3327
aa9c2669
DQ		 3328 args.bitmask = nfs4_bitmask(server, label);
3329
2b3de441
DH		 3330 nfs_fattr_init(fattr);
3331
1da177e4 3332 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3333 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3334 dprintk("NFS reply lookup: %d\n", status);
3335 return status;
3336}
3337
72de53ec 3338static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3339{
7ebb9315 3340 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3341 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3342 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3343 fattr->nlink = 2;
3344}
3345
72de53ec
BS		 3346static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3347 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3348 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3349{
3350 struct nfs4_exception exception = { };
72de53ec 3351 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3352 int err;
3353 do {
1775fd3e 3354 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3355 trace_nfs4_lookup(dir, name, err);
72de53ec 3356 switch (err) {
08ef7bd3 3357 case -NFS4ERR_BADNAME:
72de53ec
BS		 3358 err = -ENOENT;
3359 goto out;
0c2e53f1 3360 case -NFS4ERR_MOVED:
f05d147f 3361 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3362 if (err == -NFS4ERR_MOVED)
3363 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3364 goto out;
0c2e53f1 3365 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3366 err = -EPERM;
3367 if (client != *clnt)
3368 goto out;
66b06860 3369 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3370 if (IS_ERR(client))
3371 return PTR_ERR(client);
3372
3373 exception.retry = 1;
3374 break;
3375 default:
3376 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3377 }
1da177e4 3378 } while (exception.retry);
72de53ec
BS		 3379
3380out:
3381 if (err == 0)
3382 *clnt = client;
3383 else if (client != *clnt)
3384 rpc_shutdown_client(client);
3385
1da177e4
LT		 3386 return err;
3387}
3388
80a16b21 3389static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3390 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3391 struct nfs4_label *label)
72de53ec
BS		 3392{
3393 int status;
3394 struct rpc_clnt *client = NFS_CLIENT(dir);
3395
1775fd3e 3396 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3397 if (client != NFS_CLIENT(dir)) {
3398 rpc_shutdown_client(client);
3399 nfs_fixup_secinfo_attributes(fattr);
3400 }
3401 return status;
3402}
3403
f05d147f
BS		 3404struct rpc_clnt *
3405nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3406 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3407{
b72888cb 3408 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3409 int status;
f05d147f 3410
1775fd3e 3411 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3412 if (status < 0)
f05d147f 3413 return ERR_PTR(status);
b72888cb 3414 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3415}
3416
1da177e4
LT		 3417static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3418{
76b32999 3419 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3420 struct nfs4_accessargs args = {
3421 .fh = NFS_FH(inode),
a4980e78 3422 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3423 };
3424 struct nfs4_accessres res = {
3425 .server = server,
1da177e4 3426 };
1da177e4
LT		 3427 struct rpc_message msg = {
3428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3429 .rpc_argp = &args,
3430 .rpc_resp = &res,
3431 .rpc_cred = entry->cred,
3432 };
3433 int mode = entry->mask;
aa9c2669 3434 int status = 0;
1da177e4
LT		 3435
3436 /*
3437 * Determine which access bits we want to ask for...
3438 */
3439 if (mode & MAY_READ)
3440 args.access |= NFS4_ACCESS_READ;
3441 if (S_ISDIR(inode->i_mode)) {
3442 if (mode & MAY_WRITE)
3443 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3444 if (mode & MAY_EXEC)
3445 args.access |= NFS4_ACCESS_LOOKUP;
3446 } else {
3447 if (mode & MAY_WRITE)
3448 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3449 if (mode & MAY_EXEC)
3450 args.access |= NFS4_ACCESS_EXECUTE;
3451 }
c407d41a
TM		 3452
3453 res.fattr = nfs_alloc_fattr();
3454 if (res.fattr == NULL)
3455 return -ENOMEM;
3456
7c513058 3457 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3458 if (!status) {
6168f62c 3459 nfs_access_set_mask(entry, res.access);
c407d41a 3460 nfs_refresh_inode(inode, res.fattr);
1da177e4 3461 }
c407d41a 3462 nfs_free_fattr(res.fattr);
1da177e4
LT		 3463 return status;
3464}
3465
3466static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3467{
3468 struct nfs4_exception exception = { };
3469 int err;
3470 do {
c1578b76
TM		 3471 err = _nfs4_proc_access(inode, entry);
3472 trace_nfs4_access(inode, err);
3473 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3474 &exception);
3475 } while (exception.retry);
3476 return err;
3477}
3478
3479/*
3480 * TODO: For the time being, we don't try to get any attributes
3481 * along with any of the zero-copy operations READ, READDIR,
3482 * READLINK, WRITE.
3483 *
3484 * In the case of the first three, we want to put the GETATTR
3485 * after the read-type operation -- this is because it is hard
3486 * to predict the length of a GETATTR response in v4, and thus
3487 * align the READ data correctly. This means that the GETATTR
3488 * may end up partially falling into the page cache, and we should
3489 * shift it into the 'tail' of the xdr_buf before processing.
3490 * To do this efficiently, we need to know the total length
3491 * of data received, which doesn't seem to be available outside
3492 * of the RPC layer.
3493 *
3494 * In the case of WRITE, we also want to put the GETATTR after
3495 * the operation -- in this case because we want to make sure
140150db 3496 * we get the post-operation mtime and size.
1da177e4
LT		 3497 *
3498 * Both of these changes to the XDR layer would in fact be quite
3499 * minor, but I decided to leave them for a subsequent patch.
3500 */
3501static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3502 unsigned int pgbase, unsigned int pglen)
3503{
3504 struct nfs4_readlink args = {
3505 .fh = NFS_FH(inode),
3506 .pgbase = pgbase,
3507 .pglen = pglen,
3508 .pages = &page,
3509 };
f50c7000 3510 struct nfs4_readlink_res res;
1da177e4
LT		 3511 struct rpc_message msg = {
3512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3513 .rpc_argp = &args,
f50c7000 3514 .rpc_resp = &res,
1da177e4
LT		 3515 };
3516
7c513058 3517 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3518}
3519
3520static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3521 unsigned int pgbase, unsigned int pglen)
3522{
3523 struct nfs4_exception exception = { };
3524 int err;
3525 do {
c1578b76
TM		 3526 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3527 trace_nfs4_readlink(inode, err);
3528 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3529 &exception);
3530 } while (exception.retry);
3531 return err;
3532}
3533
1da177e4 3534/*
8867fe58 3535 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3536 */
1da177e4
LT		 3537static int
3538nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3539 int flags)
1da177e4 3540{
aa9c2669 3541 struct nfs4_label l, *ilabel = NULL;
8867fe58 3542 struct nfs_open_context *ctx;
1da177e4 3543 struct nfs4_state *state;
5bc2afc2 3544 int opened = 0;
1da177e4
LT		 3545 int status = 0;
3546
8867fe58
MS		 3547 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3548 if (IS_ERR(ctx))
3549 return PTR_ERR(ctx);
3550
aa9c2669
DQ		 3551 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3552
a8a5da99 3553 sattr->ia_mode &= ~current_umask();
5bc2afc2 3554 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3555 if (IS_ERR(state)) {
3556 status = PTR_ERR(state);
c0204fd2 3557 goto out;
1da177e4 3558 }
1da177e4 3559out:
aa9c2669 3560 nfs4_label_release_security(ilabel);
8867fe58 3561 put_nfs_open_context(ctx);
1da177e4
LT		 3562 return status;
3563}
3564
3565static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3566{
16e42959 3567 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3568 struct nfs_removeargs args = {
1da177e4 3569 .fh = NFS_FH(dir),
26fe5750 3570 .name = *name,
16e42959 3571 };
4fdc17b2 3572 struct nfs_removeres res = {
16e42959 3573 .server = server,
1da177e4 3574 };
1da177e4 3575 struct rpc_message msg = {
4fdc17b2
TM		 3576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3577 .rpc_argp = &args,
3578 .rpc_resp = &res,
1da177e4 3579 };
778d2817 3580 int status;
1da177e4 3581
7c513058 3582 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3583 if (status == 0)
16e42959 3584 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3585 return status;
3586}
3587
3588static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3589{
3590 struct nfs4_exception exception = { };
3591 int err;
3592 do {
078ea3df
TM		 3593 err = _nfs4_proc_remove(dir, name);
3594 trace_nfs4_remove(dir, name, err);
3595 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3596 &exception);
3597 } while (exception.retry);
3598 return err;
3599}
3600
e4eff1a6 3601static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3602{
e4eff1a6
TM		 3603 struct nfs_server *server = NFS_SERVER(dir);
3604 struct nfs_removeargs *args = msg->rpc_argp;
3605 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3606
e4eff1a6 3607 res->server = server;
1da177e4 3608 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3609 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3610
3611 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3612}
3613
34e137cc
BS		 3614static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3615{
d9afbd1b
TM		 3616 nfs4_setup_sequence(NFS_SERVER(data->dir),
3617 &data->args.seq_args,
3618 &data->res.seq_res,
3619 task);
1da177e4
LT		 3620}
3621
e4eff1a6 3622static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3623{
078ea3df
TM		 3624 struct nfs_unlinkdata *data = task->tk_calldata;
3625 struct nfs_removeres *res = &data->res;
e4eff1a6 3626
14516c3a
TM		 3627 if (!nfs4_sequence_done(task, &res->seq_res))
3628 return 0;
8478eaa1
N		 3629 if (nfs4_async_handle_error(task, res->server, NULL,
3630 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3631 return 0;
3632 update_changeattr(dir, &res->cinfo);
e4eff1a6 3633 return 1;
1da177e4
LT		 3634}
3635
d3d4152a
JL		 3636static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3637{
3638 struct nfs_server *server = NFS_SERVER(dir);
3639 struct nfs_renameargs *arg = msg->rpc_argp;
3640 struct nfs_renameres *res = msg->rpc_resp;
3641
3642 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3643 res->server = server;
a9c92d6b 3644 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3645}
3646
c6bfa1a1
BS		 3647static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3648{
d9afbd1b
TM		 3649 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3650 &data->args.seq_args,
3651 &data->res.seq_res,
3652 task);
d3d4152a
JL		 3653}
3654
3655static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3656 struct inode *new_dir)
3657{
fbc6f7c2
TM		 3658 struct nfs_renamedata *data = task->tk_calldata;
3659 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3660
3661 if (!nfs4_sequence_done(task, &res->seq_res))
3662 return 0;
8478eaa1 3663 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3664 return 0;
3665
3666 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3667 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3668 return 1;
3669}
3670
1da177e4
LT		 3671static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3672{
91ba2eee 3673 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3674 struct nfs4_link_arg arg = {
3675 .fh = NFS_FH(inode),
3676 .dir_fh = NFS_FH(dir),
3677 .name = name,
91ba2eee
TM		 3678 .bitmask = server->attr_bitmask,
3679 };
91ba2eee
TM		 3680 struct nfs4_link_res res = {
3681 .server = server,
1775fd3e 3682 .label = NULL,
1da177e4 3683 };
1da177e4
LT		 3684 struct rpc_message msg = {
3685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3686 .rpc_argp = &arg,
91ba2eee 3687 .rpc_resp = &res,
1da177e4 3688 };
136f2627
TM		 3689 int status = -ENOMEM;
3690
3691 res.fattr = nfs_alloc_fattr();
778d2817 3692 if (res.fattr == NULL)
136f2627 3693 goto out;
1da177e4 3694
14c43f76
DQ		 3695 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3696 if (IS_ERR(res.label)) {
3697 status = PTR_ERR(res.label);
3698 goto out;
3699 }
aa9c2669 3700 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3701
7c513058 3702 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3703 if (!status) {
3704 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3705 status = nfs_post_op_update_inode(inode, res.fattr);
3706 if (!status)
3707 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3708 }
14c43f76
DQ		 3709
3710
3711 nfs4_label_free(res.label);
3712
136f2627 3713out:
136f2627 3714 nfs_free_fattr(res.fattr);
1da177e4
LT		 3715 return status;
3716}
3717
3718static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3719{
3720 struct nfs4_exception exception = { };
3721 int err;
3722 do {
3723 err = nfs4_handle_exception(NFS_SERVER(inode),
3724 _nfs4_proc_link(inode, dir, name),
3725 &exception);
3726 } while (exception.retry);
3727 return err;
3728}
3729
57dc9a57
TM		 3730struct nfs4_createdata {
3731 struct rpc_message msg;
3732 struct nfs4_create_arg arg;
3733 struct nfs4_create_res res;
3734 struct nfs_fh fh;
3735 struct nfs_fattr fattr;
1775fd3e 3736 struct nfs4_label *label;
57dc9a57
TM		 3737};
3738
3739static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3740 struct qstr *name, struct iattr *sattr, u32 ftype)
3741{
3742 struct nfs4_createdata *data;
3743
3744 data = kzalloc(sizeof(*data), GFP_KERNEL);
3745 if (data != NULL) {
3746 struct nfs_server *server = NFS_SERVER(dir);
3747
14c43f76
DQ		 3748 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3749 if (IS_ERR(data->label))
3750 goto out_free;
3751
57dc9a57
TM		 3752 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3753 data->msg.rpc_argp = &data->arg;
3754 data->msg.rpc_resp = &data->res;
3755 data->arg.dir_fh = NFS_FH(dir);
3756 data->arg.server = server;
3757 data->arg.name = name;
3758 data->arg.attrs = sattr;
3759 data->arg.ftype = ftype;
aa9c2669 3760 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3761 data->res.server = server;
3762 data->res.fh = &data->fh;
3763 data->res.fattr = &data->fattr;
1775fd3e 3764 data->res.label = data->label;
57dc9a57 3765 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3766 }
3767 return data;
14c43f76
DQ		 3768out_free:
3769 kfree(data);
3770 return NULL;
57dc9a57
TM		 3771}
3772
3773static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3774{
7c513058 3775 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3776 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3777 if (status == 0) {
3778 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3779 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3780 }
3781 return status;
3782}
3783
3784static void nfs4_free_createdata(struct nfs4_createdata *data)
3785{
14c43f76 3786 nfs4_label_free(data->label);
57dc9a57
TM		 3787 kfree(data);
3788}
3789
4f390c15 3790static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3791 struct page *page, unsigned int len, struct iattr *sattr,
3792 struct nfs4_label *label)
1da177e4 3793{
57dc9a57
TM		 3794 struct nfs4_createdata *data;
3795 int status = -ENAMETOOLONG;
1da177e4 3796
94a6d753 3797 if (len > NFS4_MAXPATHLEN)
57dc9a57 3798 goto out;
4f390c15 3799
57dc9a57
TM		 3800 status = -ENOMEM;
3801 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3802 if (data == NULL)
3803 goto out;
3804
3805 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3806 data->arg.u.symlink.pages = &page;
3807 data->arg.u.symlink.len = len;
1775fd3e 3808 data->arg.label = label;
1da177e4 3809
57dc9a57
TM		 3810 status = nfs4_do_create(dir, dentry, data);
3811
3812 nfs4_free_createdata(data);
3813out:
1da177e4
LT		 3814 return status;
3815}
3816
4f390c15 3817static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3818 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3819{
3820 struct nfs4_exception exception = { };
aa9c2669 3821 struct nfs4_label l, *label = NULL;
1da177e4 3822 int err;
aa9c2669
DQ		 3823
3824 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3825
1da177e4 3826 do {
078ea3df
TM		 3827 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3828 trace_nfs4_symlink(dir, &dentry->d_name, err);
3829 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3830 &exception);
3831 } while (exception.retry);
aa9c2669
DQ		 3832
3833 nfs4_label_release_security(label);
1da177e4
LT		 3834 return err;
3835}
3836
3837static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3838 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3839{
57dc9a57
TM		 3840 struct nfs4_createdata *data;
3841 int status = -ENOMEM;
1da177e4 3842
57dc9a57
TM		 3843 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3844 if (data == NULL)
3845 goto out;
3846
1775fd3e 3847 data->arg.label = label;
57dc9a57
TM		 3848 status = nfs4_do_create(dir, dentry, data);
3849
3850 nfs4_free_createdata(data);
3851out:
1da177e4
LT		 3852 return status;
3853}
3854
3855static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3856 struct iattr *sattr)
3857{
3858 struct nfs4_exception exception = { };
aa9c2669 3859 struct nfs4_label l, *label = NULL;
1da177e4 3860 int err;
a8a5da99 3861
aa9c2669
DQ		 3862 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3863
a8a5da99 3864 sattr->ia_mode &= ~current_umask();
1da177e4 3865 do {
078ea3df
TM		 3866 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3867 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3868 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3869 &exception);
3870 } while (exception.retry);
aa9c2669
DQ		 3871 nfs4_label_release_security(label);
3872
1da177e4
LT		 3873 return err;
3874}
3875
3876static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3877 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3878{
2b0143b5 3879 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3880 struct nfs4_readdir_arg args = {
3881 .fh = NFS_FH(dir),
56e4ebf8 3882 .pages = pages,
1da177e4
LT		 3883 .pgbase = 0,
3884 .count = count,
2b0143b5 3885 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3886 .plus = plus,
1da177e4
LT		 3887 };
3888 struct nfs4_readdir_res res;
3889 struct rpc_message msg = {
3890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3891 .rpc_argp = &args,
3892 .rpc_resp = &res,
3893 .rpc_cred = cred,
3894 };
3895 int status;
3896
6de1472f
AV		 3897 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3898 dentry,
eadf4598 3899 (unsigned long long)cookie);
c3f52af3 3900 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3901 res.pgbase = args.pgbase;
7c513058 3902 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3903 if (status >= 0) {
c3f52af3 3904 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3905 status += args.pgbase;
3906 }
c4812998
TM		 3907
3908 nfs_invalidate_atime(dir);
3909
3110ff80 3910 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3911 return status;
3912}
3913
3914static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3915 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3916{
3917 struct nfs4_exception exception = { };
3918 int err;
3919 do {
c1578b76
TM		 3920 err = _nfs4_proc_readdir(dentry, cred, cookie,
3921 pages, count, plus);
2b0143b5
DH		 3922 trace_nfs4_readdir(d_inode(dentry), err);
3923 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3924 &exception);
3925 } while (exception.retry);
3926 return err;
3927}
3928
3929static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3930 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3931{
57dc9a57
TM		 3932 struct nfs4_createdata *data;
3933 int mode = sattr->ia_mode;
3934 int status = -ENOMEM;
1da177e4 3935
57dc9a57
TM		 3936 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3937 if (data == NULL)
3938 goto out;
3939
1da177e4 3940 if (S_ISFIFO(mode))
57dc9a57 3941 data->arg.ftype = NF4FIFO;
1da177e4 3942 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3943 data->arg.ftype = NF4BLK;
3944 data->arg.u.device.specdata1 = MAJOR(rdev);
3945 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3946 }
3947 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3948 data->arg.ftype = NF4CHR;
3949 data->arg.u.device.specdata1 = MAJOR(rdev);
3950 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3951 } else if (!S_ISSOCK(mode)) {
3952 status = -EINVAL;
3953 goto out_free;
1da177e4 3954 }
1775fd3e 3955
aa9c2669 3956 data->arg.label = label;
57dc9a57 3957 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3958out_free:
57dc9a57
TM		 3959 nfs4_free_createdata(data);
3960out:
1da177e4
LT		 3961 return status;
3962}
3963
3964static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3965 struct iattr *sattr, dev_t rdev)
3966{
3967 struct nfs4_exception exception = { };
aa9c2669 3968 struct nfs4_label l, *label = NULL;
1da177e4 3969 int err;
a8a5da99 3970
aa9c2669
DQ		 3971 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3972
a8a5da99 3973 sattr->ia_mode &= ~current_umask();
1da177e4 3974 do {
078ea3df
TM		 3975 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3976 trace_nfs4_mknod(dir, &dentry->d_name, err);
3977 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3978 &exception);
3979 } while (exception.retry);
aa9c2669
DQ		 3980
3981 nfs4_label_release_security(label);
3982
1da177e4
LT		 3983 return err;
3984}
3985
3986static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3987 struct nfs_fsstat *fsstat)
3988{
3989 struct nfs4_statfs_arg args = {
3990 .fh = fhandle,
3991 .bitmask = server->attr_bitmask,
3992 };
24ad148a
BH		 3993 struct nfs4_statfs_res res = {
3994 .fsstat = fsstat,
3995 };
1da177e4
LT		 3996 struct rpc_message msg = {
3997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3998 .rpc_argp = &args,
24ad148a 3999 .rpc_resp = &res,
1da177e4
LT		 4000 };
4001
0e574af1 4002 nfs_fattr_init(fsstat->fattr);
7c513058 4003 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4004}
4005
4006static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4007{
4008 struct nfs4_exception exception = { };
4009 int err;
4010 do {
4011 err = nfs4_handle_exception(server,
4012 _nfs4_proc_statfs(server, fhandle, fsstat),
4013 &exception);
4014 } while (exception.retry);
4015 return err;
4016}
4017
4018static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4019 struct nfs_fsinfo *fsinfo)
4020{
4021 struct nfs4_fsinfo_arg args = {
4022 .fh = fhandle,
4023 .bitmask = server->attr_bitmask,
4024 };
3dda5e43
BH		 4025 struct nfs4_fsinfo_res res = {
4026 .fsinfo = fsinfo,
4027 };
1da177e4
LT		 4028 struct rpc_message msg = {
4029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4030 .rpc_argp = &args,
3dda5e43 4031 .rpc_resp = &res,
1da177e4
LT		 4032 };
4033
7c513058 4034 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4035}
4036
4037static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4038{
4039 struct nfs4_exception exception = { };
83ca7f5a 4040 unsigned long now = jiffies;
1da177e4
LT		 4041 int err;
4042
4043 do {
83ca7f5a 4044 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4045 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4046 if (err == 0) {
4047 struct nfs_client *clp = server->nfs_client;
4048
4049 spin_lock(&clp->cl_lock);
4050 clp->cl_lease_time = fsinfo->lease_time * HZ;
4051 clp->cl_last_renewal = now;
4052 spin_unlock(&clp->cl_lock);
4053 break;
4054 }
4055 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4056 } while (exception.retry);
4057 return err;
4058}
4059
4060static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4061{
e38eb650
BS		 4062 int error;
4063
0e574af1 4064 nfs_fattr_init(fsinfo->fattr);
e38eb650 4065 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4066 if (error == 0) {
4067 /* block layout checks this! */
4068 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4069 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4070 }
e38eb650
BS		 4071
4072 return error;
1da177e4
LT		 4073}
4074
4075static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4076 struct nfs_pathconf *pathconf)
4077{
4078 struct nfs4_pathconf_arg args = {
4079 .fh = fhandle,
4080 .bitmask = server->attr_bitmask,
4081 };
d45b2989
BH		 4082 struct nfs4_pathconf_res res = {
4083 .pathconf = pathconf,
4084 };
1da177e4
LT		 4085 struct rpc_message msg = {
4086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4087 .rpc_argp = &args,
d45b2989 4088 .rpc_resp = &res,
1da177e4
LT		 4089 };
4090
4091 /* None of the pathconf attributes are mandatory to implement */
4092 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4093 memset(pathconf, 0, sizeof(*pathconf));
4094 return 0;
4095 }
4096
0e574af1 4097 nfs_fattr_init(pathconf->fattr);
7c513058 4098 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4099}
4100
4101static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4102 struct nfs_pathconf *pathconf)
4103{
4104 struct nfs4_exception exception = { };
4105 int err;
4106
4107 do {
4108 err = nfs4_handle_exception(server,
4109 _nfs4_proc_pathconf(server, fhandle, pathconf),
4110 &exception);
4111 } while (exception.retry);
4112 return err;
4113}
4114
5521abfd 4115int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4116 const struct nfs_open_context *ctx,
4117 const struct nfs_lock_context *l_ctx,
4118 fmode_t fmode)
4119{
4120 const struct nfs_lockowner *lockowner = NULL;
4121
4122 if (l_ctx != NULL)
4123 lockowner = &l_ctx->lockowner;
5521abfd 4124 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4125}
4126EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4127
5521abfd
TM		 4128static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4129 const struct nfs_open_context *ctx,
4130 const struct nfs_lock_context *l_ctx,
4131 fmode_t fmode)
4132{
4133 nfs4_stateid current_stateid;
4134
e1253be0
TM		 4135 /* If the current stateid represents a lost lock, then exit */
4136 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4137 return true;
5521abfd
TM		 4138 return nfs4_stateid_match(stateid, &current_stateid);
4139}
4140
4141static bool nfs4_error_stateid_expired(int err)
4142{
4143 switch (err) {
4144 case -NFS4ERR_DELEG_REVOKED:
4145 case -NFS4ERR_ADMIN_REVOKED:
4146 case -NFS4ERR_BAD_STATEID:
4147 case -NFS4ERR_STALE_STATEID:
4148 case -NFS4ERR_OLD_STATEID:
4149 case -NFS4ERR_OPENMODE:
4150 case -NFS4ERR_EXPIRED:
4151 return true;
4152 }
4153 return false;
4154}
4155
d45f60c6 4156void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4157{
d45f60c6 4158 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4159}
4160
d45f60c6 4161static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4162{
d45f60c6 4163 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4164
d45f60c6
WAA		 4165 trace_nfs4_read(hdr, task->tk_status);
4166 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4167 hdr->args.context->state,
4168 NULL) == -EAGAIN) {
d00c5d43 4169 rpc_restart_call_prepare(task);
ec06c096 4170 return -EAGAIN;
1da177e4 4171 }
8850df99 4172
d45f60c6 4173 __nfs4_read_done_cb(hdr);
1da177e4 4174 if (task->tk_status > 0)
d45f60c6 4175 renew_lease(server, hdr->timestamp);
ec06c096 4176 return 0;
1da177e4
LT		 4177}
4178
5521abfd 4179static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4180 struct nfs_pgio_args *args)
5521abfd
TM		 4181{
4182
4183 if (!nfs4_error_stateid_expired(task->tk_status) ||
4184 nfs4_stateid_is_current(&args->stateid,
4185 args->context,
4186 args->lock_context,
4187 FMODE_READ))
4188 return false;
4189 rpc_restart_call_prepare(task);
4190 return true;
4191}
4192
d45f60c6 4193static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4194{
4195
4196 dprintk("--> %s\n", __func__);
4197
d45f60c6 4198 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4199 return -EAGAIN;
d45f60c6 4200 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4201 return -EAGAIN;
d45f60c6
WAA		 4202 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4203 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4204}
4205
d45f60c6
WAA		 4206static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4207 struct rpc_message *msg)
1da177e4 4208{
d45f60c6
WAA		 4209 hdr->timestamp = jiffies;
4210 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4211 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4212 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4213}
4214
d45f60c6
WAA		 4215static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4216 struct nfs_pgio_header *hdr)
ea7c3303 4217{
d45f60c6
WAA		 4218 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4219 &hdr->args.seq_args,
4220 &hdr->res.seq_res,
9b206149 4221 task))
ef1820f9 4222 return 0;
d45f60c6
WAA		 4223 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4224 hdr->args.lock_context,
4225 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4226 return -EIO;
d45f60c6 4227 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4228 return -EIO;
4229 return 0;
1da177e4
LT		 4230}
4231
d45f60c6
WAA		 4232static int nfs4_write_done_cb(struct rpc_task *task,
4233 struct nfs_pgio_header *hdr)
1da177e4 4234{
d45f60c6 4235 struct inode *inode = hdr->inode;
8478eaa1 4236
d45f60c6
WAA		 4237 trace_nfs4_write(hdr, task->tk_status);
4238 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4239 hdr->args.context->state,
4240 NULL) == -EAGAIN) {
d00c5d43 4241 rpc_restart_call_prepare(task);
788e7a89 4242 return -EAGAIN;
1da177e4 4243 }
4f9838c7 4244 if (task->tk_status >= 0) {
d45f60c6 4245 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4246 nfs_writeback_update_inode(hdr);
4f9838c7 4247 }
788e7a89 4248 return 0;
1da177e4
LT		 4249}
4250
5521abfd 4251static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4252 struct nfs_pgio_args *args)
5521abfd
TM		 4253{
4254
4255 if (!nfs4_error_stateid_expired(task->tk_status) ||
4256 nfs4_stateid_is_current(&args->stateid,
4257 args->context,
4258 args->lock_context,
4259 FMODE_WRITE))
4260 return false;
4261 rpc_restart_call_prepare(task);
4262 return true;
4263}
4264
d45f60c6 4265static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4266{
d45f60c6 4267 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4268 return -EAGAIN;
d45f60c6 4269 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4270 return -EAGAIN;
d45f60c6
WAA		 4271 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4272 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4273}
4274
5a37f851 4275static
d45f60c6 4276bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4277{
5a37f851 4278 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4279 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4280 return false;
4281 /* Otherwise, request attributes if and only if we don't hold
4282 * a delegation
4283 */
011e2a7f 4284 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4285}
a69aef14 4286
d45f60c6
WAA		 4287static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4288 struct rpc_message *msg)
1da177e4 4289{
d45f60c6 4290 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4291
d45f60c6
WAA		 4292 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4293 hdr->args.bitmask = NULL;
4294 hdr->res.fattr = NULL;
7ffd1064 4295 } else
d45f60c6 4296 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4297
d45f60c6
WAA		 4298 if (!hdr->pgio_done_cb)
4299 hdr->pgio_done_cb = nfs4_write_done_cb;
4300 hdr->res.server = server;
4301 hdr->timestamp = jiffies;
1da177e4 4302
bdc7f021 4303 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4304 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4305}
4306
0b7c0153 4307static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4308{
d9afbd1b
TM		 4309 nfs4_setup_sequence(NFS_SERVER(data->inode),
4310 &data->args.seq_args,
4311 &data->res.seq_res,
4312 task);
1da177e4
LT		 4313}
4314
0b7c0153 4315static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4316{
1da177e4 4317 struct inode *inode = data->inode;
14516c3a 4318
cc668ab3 4319 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4320 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4321 NULL, NULL) == -EAGAIN) {
d00c5d43 4322 rpc_restart_call_prepare(task);
788e7a89 4323 return -EAGAIN;
1da177e4 4324 }
788e7a89 4325 return 0;
1da177e4
LT		 4326}
4327
0b7c0153 4328static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4329{
4330 if (!nfs4_sequence_done(task, &data->res.seq_res))
4331 return -EAGAIN;
0b7c0153 4332 return data->commit_done_cb(task, data);
5f452431
FI		 4333}
4334
0b7c0153 4335static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4336{
788e7a89 4337 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4338
0b7c0153
FI		 4339 if (data->commit_done_cb == NULL)
4340 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4341 data->res.server = server;
bdc7f021 4342 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4343 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4344}
4345
9bc4e3ca
CL		 4346struct nfs4_renewdata {
4347 struct nfs_client *client;
4348 unsigned long timestamp;
4349};
4350
1da177e4
LT		 4351/*
4352 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4353 * standalone procedure for queueing an asynchronous RENEW.
4354 */
9bc4e3ca 4355static void nfs4_renew_release(void *calldata)
dc96aef9 4356{
9bc4e3ca
CL		 4357 struct nfs4_renewdata *data = calldata;
4358 struct nfs_client *clp = data->client;
dc96aef9 4359
0851de06
AB		 4360 if (atomic_read(&clp->cl_count) > 1)
4361 nfs4_schedule_state_renewal(clp);
4362 nfs_put_client(clp);
9bc4e3ca 4363 kfree(data);
dc96aef9
AB		 4364}
4365
9bc4e3ca 4366static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4367{
9bc4e3ca
CL		 4368 struct nfs4_renewdata *data = calldata;
4369 struct nfs_client *clp = data->client;
4370 unsigned long timestamp = data->timestamp;
1da177e4 4371
c6d01c6f 4372 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4373 switch (task->tk_status) {
4374 case 0:
4375 break;
4376 case -NFS4ERR_LEASE_MOVED:
4377 nfs4_schedule_lease_moved_recovery(clp);
4378 break;
4379 default:
95baa25c 4380 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4381 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4382 return;
4383 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4384 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4385 return;
4386 }
4387 nfs4_schedule_path_down_recovery(clp);
1da177e4 4388 }
452e9352 4389 do_renew_lease(clp, timestamp);
1da177e4
LT		 4390}
4391
963d8fe5
TM		 4392static const struct rpc_call_ops nfs4_renew_ops = {
4393 .rpc_call_done = nfs4_renew_done,
dc96aef9 4394 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4395};
4396
2f60ea6b 4397static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4398{
4399 struct rpc_message msg = {
4400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4401 .rpc_argp = clp,
b4454fe1 4402 .rpc_cred = cred,
1da177e4 4403 };
9bc4e3ca 4404 struct nfs4_renewdata *data;
1da177e4 4405
2f60ea6b
TM		 4406 if (renew_flags == 0)
4407 return 0;
0851de06
AB		 4408 if (!atomic_inc_not_zero(&clp->cl_count))
4409 return -EIO;
b569ad34 4410 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4411 if (data == NULL)
4412 return -ENOMEM;
4413 data->client = clp;
4414 data->timestamp = jiffies;
bc7a05ca 4415 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4416 &nfs4_renew_ops, data);
1da177e4
LT		 4417}
4418
8534d4ec 4419static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4420{
4421 struct rpc_message msg = {
4422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4423 .rpc_argp = clp,
b4454fe1 4424 .rpc_cred = cred,
1da177e4
LT		 4425 };
4426 unsigned long now = jiffies;
4427 int status;
4428
bc7a05ca 4429 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4430 if (status < 0)
4431 return status;
452e9352 4432 do_renew_lease(clp, now);
1da177e4
LT		 4433 return 0;
4434}
4435
aa1870af
BF		 4436static inline int nfs4_server_supports_acls(struct nfs_server *server)
4437{
7dd7d959 4438 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4439}
4440
21f498c2
TM		 4441/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4442 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4443 * the stack.
4444 */
21f498c2 4445#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4446
e9e3d724
NH		 4447static int buf_to_pages_noslab(const void *buf, size_t buflen,
4448 struct page **pages, unsigned int *pgbase)
4449{
4450 struct page *newpage, **spages;
4451 int rc = 0;
4452 size_t len;
4453 spages = pages;
4454
4455 do {
21f498c2 4456 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4457 newpage = alloc_page(GFP_KERNEL);
4458
4459 if (newpage == NULL)
4460 goto unwind;
4461 memcpy(page_address(newpage), buf, len);
4462 buf += len;
4463 buflen -= len;
4464 *pages++ = newpage;
4465 rc++;
4466 } while (buflen != 0);
4467
4468 return rc;
4469
4470unwind:
4471 for(; rc > 0; rc--)
4472 __free_page(spages[rc-1]);
4473 return -ENOMEM;
4474}
4475
e50a1c2e
BF		 4476struct nfs4_cached_acl {
4477 int cached;
4478 size_t len;
3e9d4154 4479 char data[0];
e50a1c2e
BF		 4480};
4481
4482static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4483{
4484 struct nfs_inode *nfsi = NFS_I(inode);
4485
4486 spin_lock(&inode->i_lock);
4487 kfree(nfsi->nfs4_acl);
4488 nfsi->nfs4_acl = acl;
4489 spin_unlock(&inode->i_lock);
4490}
4491
4492static void nfs4_zap_acl_attr(struct inode *inode)
4493{
4494 nfs4_set_cached_acl(inode, NULL);
4495}
4496
4497static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4498{
4499 struct nfs_inode *nfsi = NFS_I(inode);
4500 struct nfs4_cached_acl *acl;
4501 int ret = -ENOENT;
4502
4503 spin_lock(&inode->i_lock);
4504 acl = nfsi->nfs4_acl;
4505 if (acl == NULL)
4506 goto out;
4507 if (buf == NULL) /* user is just asking for length */
4508 goto out_len;
4509 if (acl->cached == 0)
4510 goto out;
4511 ret = -ERANGE; /* see getxattr(2) man page */
4512 if (acl->len > buflen)
4513 goto out;
4514 memcpy(buf, acl->data, acl->len);
4515out_len:
4516 ret = acl->len;
4517out:
4518 spin_unlock(&inode->i_lock);
4519 return ret;
4520}
4521
5794d21e 4522static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4523{
4524 struct nfs4_cached_acl *acl;
b291f1b1 4525 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4526
1f1ea6c2 4527 if (buflen <= PAGE_SIZE) {
b291f1b1 4528 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4529 if (acl == NULL)
4530 goto out;
4531 acl->cached = 1;
5794d21e 4532 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4533 } else {
4534 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4535 if (acl == NULL)
4536 goto out;
4537 acl->cached = 0;
4538 }
4539 acl->len = acl_len;
4540out:
4541 nfs4_set_cached_acl(inode, acl);
4542}
4543
bf118a34
AA		 4544/*
4545 * The getxattr API returns the required buffer length when called with a
4546 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4547 * the required buf. On a NULL buf, we send a page of data to the server
4548 * guessing that the ACL request can be serviced by a page. If so, we cache
4549 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4550 * the cache. If not so, we throw away the page, and cache the required
4551 * length. The next getxattr call will then produce another round trip to
4552 * the server, this time with the input buf of the required size.
4553 */
16b4289c 4554static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4555{
bf118a34 4556 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4557 struct nfs_getaclargs args = {
4558 .fh = NFS_FH(inode),
4559 .acl_pages = pages,
4560 .acl_len = buflen,
4561 };
663c79b3
BH		 4562 struct nfs_getaclres res = {
4563 .acl_len = buflen,
4564 };
aa1870af
BF		 4565 struct rpc_message msg = {
4566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4567 .rpc_argp = &args,
663c79b3 4568 .rpc_resp = &res,
aa1870af 4569 };
21f498c2
TM		 4570 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4571 int ret = -ENOMEM, i;
aa1870af 4572
bf118a34
AA		 4573 /* As long as we're doing a round trip to the server anyway,
4574 * let's be prepared for a page of acl data. */
4575 if (npages == 0)
4576 npages = 1;
21f498c2
TM		 4577 if (npages > ARRAY_SIZE(pages))
4578 return -ERANGE;
5a006899 4579
bf118a34
AA		 4580 for (i = 0; i < npages; i++) {
4581 pages[i] = alloc_page(GFP_KERNEL);
4582 if (!pages[i])
4583 goto out_free;
e50a1c2e 4584 }
5a006899
SP		 4585
4586 /* for decoding across pages */
4587 res.acl_scratch = alloc_page(GFP_KERNEL);
4588 if (!res.acl_scratch)
4589 goto out_free;
4590
bf118a34
AA		 4591 args.acl_len = npages * PAGE_SIZE;
4592 args.acl_pgbase = 0;
5a006899 4593
de040bec 4594 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4595 __func__, buf, buflen, npages, args.acl_len);
4596 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4597 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4598 if (ret)
4599 goto out_free;
bf118a34 4600
1f1ea6c2
TM		 4601 /* Handle the case where the passed-in buffer is too short */
4602 if (res.acl_flags & NFS4_ACL_TRUNC) {
4603 /* Did the user only issue a request for the acl length? */
4604 if (buf == NULL)
4605 goto out_ok;
e50a1c2e 4606 ret = -ERANGE;
1f1ea6c2 4607 goto out_free;
e50a1c2e 4608 }
1f1ea6c2 4609 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4610 if (buf) {
4611 if (res.acl_len > buflen) {
4612 ret = -ERANGE;
4613 goto out_free;
4614 }
1f1ea6c2 4615 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4616 }
1f1ea6c2
TM		 4617out_ok:
4618 ret = res.acl_len;
e50a1c2e 4619out_free:
bf118a34
AA		 4620 for (i = 0; i < npages; i++)
4621 if (pages[i])
4622 __free_page(pages[i]);
331818f1
TM		 4623 if (res.acl_scratch)
4624 __free_page(res.acl_scratch);
aa1870af
BF		 4625 return ret;
4626}
4627
16b4289c
TM		 4628static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4629{
4630 struct nfs4_exception exception = { };
4631 ssize_t ret;
4632 do {
4633 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4634 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4635 if (ret >= 0)
4636 break;
4637 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4638 } while (exception.retry);
4639 return ret;
4640}
4641
e50a1c2e
BF		 4642static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4643{
4644 struct nfs_server *server = NFS_SERVER(inode);
4645 int ret;
4646
4647 if (!nfs4_server_supports_acls(server))
4648 return -EOPNOTSUPP;
4649 ret = nfs_revalidate_inode(server, inode);
4650 if (ret < 0)
4651 return ret;
08a22b39
AK		 4652 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4653 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4654 ret = nfs4_read_cached_acl(inode, buf, buflen);
4655 if (ret != -ENOENT)
bf118a34
AA		 4656 /* -ENOENT is returned if there is no ACL or if there is an ACL
4657 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4658 return ret;
4659 return nfs4_get_acl_uncached(inode, buf, buflen);
4660}
4661
16b4289c 4662static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4663{
4664 struct nfs_server *server = NFS_SERVER(inode);
4665 struct page *pages[NFS4ACL_MAXPAGES];
4666 struct nfs_setaclargs arg = {
4667 .fh = NFS_FH(inode),
4668 .acl_pages = pages,
4669 .acl_len = buflen,
4670 };
73c403a9 4671 struct nfs_setaclres res;
4b580ee3
BF		 4672 struct rpc_message msg = {
4673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4674 .rpc_argp = &arg,
73c403a9 4675 .rpc_resp = &res,
4b580ee3 4676 };
21f498c2 4677 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4678 int ret, i;
4b580ee3
BF		 4679
4680 if (!nfs4_server_supports_acls(server))
4681 return -EOPNOTSUPP;
21f498c2
TM		 4682 if (npages > ARRAY_SIZE(pages))
4683 return -ERANGE;
e9e3d724
NH		 4684 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4685 if (i < 0)
4686 return i;
57ec14c5 4687 nfs4_inode_return_delegation(inode);
7c513058 4688 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4689
4690 /*
4691 * Free each page after tx, so the only ref left is
4692 * held by the network stack
4693 */
4694 for (; i > 0; i--)
4695 put_page(pages[i-1]);
4696
08a22b39
AK		 4697 /*
4698 * Acl update can result in inode attribute update.
4699 * so mark the attribute cache invalid.
4700 */
4701 spin_lock(&inode->i_lock);
4702 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4703 spin_unlock(&inode->i_lock);
f41f7418
TM		 4704 nfs_access_zap_cache(inode);
4705 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4706 return ret;
4707}
4708
16b4289c
TM		 4709static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4710{
4711 struct nfs4_exception exception = { };
4712 int err;
4713 do {
c1578b76
TM		 4714 err = __nfs4_proc_set_acl(inode, buf, buflen);
4715 trace_nfs4_set_acl(inode, err);
4716 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4717 &exception);
4718 } while (exception.retry);
4719 return err;
4720}
4721
aa9c2669
DQ		 4722#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4723static int _nfs4_get_security_label(struct inode *inode, void *buf,
4724 size_t buflen)
4725{
4726 struct nfs_server *server = NFS_SERVER(inode);
4727 struct nfs_fattr fattr;
4728 struct nfs4_label label = {0, 0, buflen, buf};
4729
4730 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4731 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4732 .fh = NFS_FH(inode),
4733 .bitmask = bitmask,
4734 };
4735 struct nfs4_getattr_res res = {
4736 .fattr = &fattr,
4737 .label = &label,
4738 .server = server,
4739 };
4740 struct rpc_message msg = {
4741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4742 .rpc_argp = &arg,
aa9c2669
DQ		 4743 .rpc_resp = &res,
4744 };
4745 int ret;
4746
4747 nfs_fattr_init(&fattr);
4748
fcb63a9b 4749 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4750 if (ret)
4751 return ret;
4752 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4753 return -ENOENT;
4754 if (buflen < label.len)
4755 return -ERANGE;
4756 return 0;
4757}
4758
4759static int nfs4_get_security_label(struct inode *inode, void *buf,
4760 size_t buflen)
4761{
4762 struct nfs4_exception exception = { };
4763 int err;
4764
4765 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4766 return -EOPNOTSUPP;
4767
4768 do {
c1578b76
TM		 4769 err = _nfs4_get_security_label(inode, buf, buflen);
4770 trace_nfs4_get_security_label(inode, err);
4771 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4772 &exception);
4773 } while (exception.retry);
4774 return err;
4775}
4776
4777static int _nfs4_do_set_security_label(struct inode *inode,
4778 struct nfs4_label *ilabel,
4779 struct nfs_fattr *fattr,
4780 struct nfs4_label *olabel)
4781{
4782
4783 struct iattr sattr = {0};
4784 struct nfs_server *server = NFS_SERVER(inode);
4785 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4786 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4787 .fh = NFS_FH(inode),
4788 .iap = &sattr,
4789 .server = server,
4790 .bitmask = bitmask,
4791 .label = ilabel,
4792 };
4793 struct nfs_setattrres res = {
4794 .fattr = fattr,
4795 .label = olabel,
4796 .server = server,
4797 };
4798 struct rpc_message msg = {
4799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4800 .rpc_argp = &arg,
aa9c2669
DQ		 4801 .rpc_resp = &res,
4802 };
4803 int status;
4804
12207f69 4805 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4806
12207f69 4807 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4808 if (status)
4809 dprintk("%s failed: %d\n", __func__, status);
4810
4811 return status;
4812}
4813
4814static int nfs4_do_set_security_label(struct inode *inode,
4815 struct nfs4_label *ilabel,
4816 struct nfs_fattr *fattr,
4817 struct nfs4_label *olabel)
4818{
4819 struct nfs4_exception exception = { };
4820 int err;
4821
4822 do {
c1578b76
TM		 4823 err = _nfs4_do_set_security_label(inode, ilabel,
4824 fattr, olabel);
4825 trace_nfs4_set_security_label(inode, err);
4826 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4827 &exception);
4828 } while (exception.retry);
4829 return err;
4830}
4831
4832static int
4833nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4834{
4835 struct nfs4_label ilabel, *olabel = NULL;
4836 struct nfs_fattr fattr;
4837 struct rpc_cred *cred;
2b0143b5 4838 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4839 int status;
4840
4841 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4842 return -EOPNOTSUPP;
4843
4844 nfs_fattr_init(&fattr);
4845
4846 ilabel.pi = 0;
4847 ilabel.lfs = 0;
4848 ilabel.label = (char *)buf;
4849 ilabel.len = buflen;
4850
4851 cred = rpc_lookup_cred();
4852 if (IS_ERR(cred))
4853 return PTR_ERR(cred);
4854
4855 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4856 if (IS_ERR(olabel)) {
4857 status = -PTR_ERR(olabel);
4858 goto out;
4859 }
4860
4861 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4862 if (status == 0)
4863 nfs_setsecurity(inode, &fattr, olabel);
4864
4865 nfs4_label_free(olabel);
4866out:
4867 put_rpccred(cred);
4868 return status;
4869}
4870#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4871
4872
1da177e4 4873static int
8478eaa1
N		 4874nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4875 struct nfs4_state *state, long *timeout)
1da177e4 4876{
aa5190d0
TM		 4877 struct nfs_client *clp = server->nfs_client;
4878
4879 if (task->tk_status >= 0)
1da177e4
LT		 4880 return 0;
4881 switch(task->tk_status) {
a1d0b5ee 4882 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4883 case -NFS4ERR_ADMIN_REVOKED:
4884 case -NFS4ERR_BAD_STATEID:
4885 case -NFS4ERR_OPENMODE:
4886 if (state == NULL)
4887 break;
5d422301 4888 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4889 goto recovery_failed;
0400a6b0 4890 goto wait_on_recovery;
0ced63d1 4891 case -NFS4ERR_EXPIRED:
5d422301
TM		 4892 if (state != NULL) {
4893 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4894 goto recovery_failed;
5d422301 4895 }
1da177e4 4896 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4897 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4898 nfs4_schedule_lease_recovery(clp);
4899 goto wait_on_recovery;
519ae255
CL		 4900 case -NFS4ERR_MOVED:
4901 if (nfs4_schedule_migration_recovery(server) < 0)
4902 goto recovery_failed;
4903 goto wait_on_recovery;
8ef2f8d4
CL		 4904 case -NFS4ERR_LEASE_MOVED:
4905 nfs4_schedule_lease_moved_recovery(clp);
4906 goto wait_on_recovery;
4745e315
AA		 4907#if defined(CONFIG_NFS_V4_1)
4908 case -NFS4ERR_BADSESSION:
4909 case -NFS4ERR_BADSLOT:
4910 case -NFS4ERR_BAD_HIGH_SLOT:
4911 case -NFS4ERR_DEADSESSION:
4912 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4913 case -NFS4ERR_SEQ_FALSE_RETRY:
4914 case -NFS4ERR_SEQ_MISORDERED:
4915 dprintk("%s ERROR %d, Reset session\n", __func__,
4916 task->tk_status);
9f594791 4917 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4918 goto wait_on_recovery;
4745e315 4919#endif /* CONFIG_NFS_V4_1 */
1da177e4 4920 case -NFS4ERR_DELAY:
aa5190d0 4921 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4922 rpc_delay(task, nfs4_update_delay(timeout));
4923 goto restart_call;
006ea73e 4924 case -NFS4ERR_GRACE:
1da177e4 4925 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4926 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4927 case -NFS4ERR_OLD_STATEID:
f1478c13 4928 goto restart_call;
1da177e4
LT		 4929 }
4930 task->tk_status = nfs4_map_errors(task->tk_status);
4931 return 0;
9f51a78e 4932recovery_failed:
5d422301
TM		 4933 task->tk_status = -EIO;
4934 return 0;
0400a6b0 4935wait_on_recovery:
a2c0b9e2 4936 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4937 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4938 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4939 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4940 goto recovery_failed;
f1478c13 4941restart_call:
a2c0b9e2
TM		 4942 task->tk_status = 0;
4943 return -EAGAIN;
1da177e4
LT		 4944}
4945
f092075d
CL		 4946static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4947 nfs4_verifier *bootverf)
cd93710e
CL		 4948{
4949 __be32 verf[2];
4950
2c820d9a
CL		 4951 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4952 /* An impossible timestamp guarantees this value
4953 * will never match a generated boot time. */
4954 verf[0] = 0;
17f26b12 4955 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4956 } else {
f092075d 4957 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4958 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4959 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4960 }
cd93710e
CL		 4961 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4962}
4963
a3192688
JL		 4964static int
4965nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4966{
a3192688
JL		 4967 int result;
4968 size_t len;
4969 char *str;
4970 bool retried = false;
e984a55a 4971
ceb3a16c 4972 if (clp->cl_owner_id != NULL)
a3192688
JL		 4973 return 0;
4974retry:
4975 rcu_read_lock();
4976 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4977 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4978 1 +
4979 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4980 1;
4981 rcu_read_unlock();
4982
4983 if (len > NFS4_OPAQUE_LIMIT + 1)
4984 return -EINVAL;
4985
4986 /*
4987 * Since this string is allocated at mount time, and held until the
4988 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4989 * about a memory-reclaim deadlock.
4990 */
4991 str = kmalloc(len, GFP_KERNEL);
4992 if (!str)
4993 return -ENOMEM;
ceb3a16c 4994
e984a55a 4995 rcu_read_lock();
a3192688
JL		 4996 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
4997 clp->cl_ipaddr,
4998 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
4999 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5000 rcu_read_unlock();
a3192688
JL		 5001
5002 /* Did something change? */
5003 if (result >= len) {
5004 kfree(str);
5005 if (retried)
5006 return -EINVAL;
5007 retried = true;
5008 goto retry;
5009 }
5010 clp->cl_owner_id = str;
5011 return 0;
e984a55a
CL		 5012}
5013
873e3851
JL		 5014static int
5015nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5016{
5017 int result;
5018 size_t len;
5019 char *str;
5020
5021 len = 10 + 10 + 1 + 10 + 1 +
5022 strlen(nfs4_client_id_uniquifier) + 1 +
5023 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5024
5025 if (len > NFS4_OPAQUE_LIMIT + 1)
5026 return -EINVAL;
5027
5028 /*
5029 * Since this string is allocated at mount time, and held until the
5030 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5031 * about a memory-reclaim deadlock.
5032 */
5033 str = kmalloc(len, GFP_KERNEL);
5034 if (!str)
5035 return -ENOMEM;
5036
5037 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5038 clp->rpc_ops->version, clp->cl_minorversion,
5039 nfs4_client_id_uniquifier,
5040 clp->cl_rpcclient->cl_nodename);
5041 if (result >= len) {
5042 kfree(str);
5043 return -EINVAL;
5044 }
5045 clp->cl_owner_id = str;
5046 return 0;
5047}
5048
5049static int
5050nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5051{
873e3851
JL		 5052 int result;
5053 size_t len;
5054 char *str;
ceb3a16c
TM		 5055
5056 if (clp->cl_owner_id != NULL)
873e3851 5057 return 0;
6f2ea7f2
CL		 5058
5059 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5060 return nfs4_init_uniquifier_client_string(clp);
5061
5062 len = 10 + 10 + 1 + 10 + 1 +
5063 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5064
5065 if (len > NFS4_OPAQUE_LIMIT + 1)
5066 return -EINVAL;
5067
5068 /*
5069 * Since this string is allocated at mount time, and held until the
5070 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5071 * about a memory-reclaim deadlock.
5072 */
5073 str = kmalloc(len, GFP_KERNEL);
5074 if (!str)
5075 return -ENOMEM;
5076
5077 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5078 clp->rpc_ops->version, clp->cl_minorversion,
5079 clp->cl_rpcclient->cl_nodename);
5080 if (result >= len) {
5081 kfree(str);
5082 return -EINVAL;
5083 }
5084 clp->cl_owner_id = str;
5085 return 0;
e984a55a
CL		 5086}
5087
706cb8db
CL		 5088/*
5089 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5090 * services. Advertise one based on the address family of the
5091 * clientaddr.
5092 */
5093static unsigned int
5094nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5095{
5096 if (strchr(clp->cl_ipaddr, ':') != NULL)
5097 return scnprintf(buf, len, "tcp6");
5098 else
5099 return scnprintf(buf, len, "tcp");
5100}
5101
f11b2a1c
JL		 5102static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5103{
5104 struct nfs4_setclientid *sc = calldata;
5105
5106 if (task->tk_status == 0)
5107 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5108}
5109
5110static const struct rpc_call_ops nfs4_setclientid_ops = {
5111 .rpc_call_done = nfs4_setclientid_done,
5112};
5113
6bbb4ae8
CL		 5114/**
5115 * nfs4_proc_setclientid - Negotiate client ID
5116 * @clp: state data structure
5117 * @program: RPC program for NFSv4 callback service
5118 * @port: IP port number for NFS4 callback service
5119 * @cred: RPC credential to use for this call
5120 * @res: where to place the result
5121 *
5122 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5123 */
bb8b27e5
TM		 5124int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5125 unsigned short port, struct rpc_cred *cred,
5126 struct nfs4_setclientid_res *res)
1da177e4
LT		 5127{
5128 nfs4_verifier sc_verifier;
5129 struct nfs4_setclientid setclientid = {
5130 .sc_verifier = &sc_verifier,
5131 .sc_prog = program,
3a6bb738 5132 .sc_clnt = clp,
1da177e4
LT		 5133 };
5134 struct rpc_message msg = {
5135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5136 .rpc_argp = &setclientid,
bb8b27e5 5137 .rpc_resp = res,
286d7d6a 5138 .rpc_cred = cred,
1da177e4 5139 };
f11b2a1c
JL		 5140 struct rpc_task *task;
5141 struct rpc_task_setup task_setup_data = {
5142 .rpc_client = clp->cl_rpcclient,
5143 .rpc_message = &msg,
5144 .callback_ops = &nfs4_setclientid_ops,
5145 .callback_data = &setclientid,
5146 .flags = RPC_TASK_TIMEOUT,
5147 };
6bbb4ae8 5148 int status;
1da177e4 5149
de734831 5150 /* nfs_client_id4 */
f092075d 5151 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5152
5153 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5154 status = nfs4_init_uniform_client_string(clp);
5155 else
a3192688 5156 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5157
5158 if (status)
5159 goto out;
3a6bb738 5160
de734831 5161 /* cb_client4 */
706cb8db
CL		 5162 setclientid.sc_netid_len =
5163 nfs4_init_callback_netid(clp,
5164 setclientid.sc_netid,
5165 sizeof(setclientid.sc_netid));
de734831 5166 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5167 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5168 clp->cl_ipaddr, port >> 8, port & 255);
5169
3a6bb738 5170 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5171 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5172 clp->cl_owner_id);
f11b2a1c
JL		 5173 task = rpc_run_task(&task_setup_data);
5174 if (IS_ERR(task)) {
5175 status = PTR_ERR(task);
5176 goto out;
5177 }
5178 status = task->tk_status;
5179 if (setclientid.sc_cred) {
5180 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5181 put_rpccred(setclientid.sc_cred);
5182 }
5183 rpc_put_task(task);
5184out:
c6d01c6f 5185 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5186 dprintk("NFS reply setclientid: %d\n", status);
5187 return status;
1da177e4
LT		 5188}
5189
6bbb4ae8
CL		 5190/**
5191 * nfs4_proc_setclientid_confirm - Confirm client ID
5192 * @clp: state data structure
5193 * @res: result of a previous SETCLIENTID
5194 * @cred: RPC credential to use for this call
5195 *
5196 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5197 */
fd954ae1 5198int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5199 struct nfs4_setclientid_res *arg,
5200 struct rpc_cred *cred)
1da177e4 5201{
1da177e4
LT		 5202 struct rpc_message msg = {
5203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5204 .rpc_argp = arg,
286d7d6a 5205 .rpc_cred = cred,
1da177e4 5206 };
1da177e4
LT		 5207 int status;
5208
6bbb4ae8
CL		 5209 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5210 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5211 clp->cl_clientid);
1bd714f2 5212 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5213 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5214 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5215 return status;
5216}
5217
fe650407
TM		 5218struct nfs4_delegreturndata {
5219 struct nfs4_delegreturnargs args;
fa178f29 5220 struct nfs4_delegreturnres res;
fe650407
TM		 5221 struct nfs_fh fh;
5222 nfs4_stateid stateid;
26e976a8 5223 unsigned long timestamp;
fa178f29 5224 struct nfs_fattr fattr;
fe650407 5225 int rpc_status;
039b756a
PT		 5226 struct inode *inode;
5227 bool roc;
5228 u32 roc_barrier;
fe650407
TM		 5229};
5230
fe650407
TM		 5231static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5232{
5233 struct nfs4_delegreturndata *data = calldata;
938e1010 5234
14516c3a
TM		 5235 if (!nfs4_sequence_done(task, &data->res.seq_res))
5236 return;
938e1010 5237
ca8acf8d 5238 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5239 switch (task->tk_status) {
79708861 5240 case 0:
fa178f29 5241 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5242 case -NFS4ERR_ADMIN_REVOKED:
5243 case -NFS4ERR_DELEG_REVOKED:
5244 case -NFS4ERR_BAD_STATEID:
5245 case -NFS4ERR_OLD_STATEID:
5246 case -NFS4ERR_STALE_STATEID:
5247 case -NFS4ERR_EXPIRED:
5248 task->tk_status = 0;
039b756a
PT		 5249 if (data->roc)
5250 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5251 break;
79708861 5252 default:
8478eaa1
N		 5253 if (nfs4_async_handle_error(task, data->res.server,
5254 NULL, NULL) == -EAGAIN) {
d00c5d43 5255 rpc_restart_call_prepare(task);
79708861
RL		 5256 return;
5257 }
5258 }
5259 data->rpc_status = task->tk_status;
fe650407
TM		 5260}
5261
5262static void nfs4_delegreturn_release(void *calldata)
5263{
039b756a 5264 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5265 struct inode *inode = data->inode;
039b756a 5266
ea7c38fe
TM		 5267 if (inode) {
5268 if (data->roc)
5269 pnfs_roc_release(inode);
5270 nfs_iput_and_deactive(inode);
5271 }
fe650407
TM		 5272 kfree(calldata);
5273}
5274
938e1010
AA		 5275static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5276{
5277 struct nfs4_delegreturndata *d_data;
5278
5279 d_data = (struct nfs4_delegreturndata *)data;
5280
039b756a
PT		 5281 if (d_data->roc &&
5282 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5283 return;
5284
d9afbd1b
TM		 5285 nfs4_setup_sequence(d_data->res.server,
5286 &d_data->args.seq_args,
5287 &d_data->res.seq_res,
5288 task);
938e1010 5289}
938e1010 5290
c8d149f3 5291static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5292 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5293 .rpc_call_done = nfs4_delegreturn_done,
5294 .rpc_release = nfs4_delegreturn_release,
5295};
5296
e6f81075 5297static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5298{
5299 struct nfs4_delegreturndata *data;
fa178f29 5300 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5301 struct rpc_task *task;
5138fde0
TM		 5302 struct rpc_message msg = {
5303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5304 .rpc_cred = cred,
5305 };
c970aa85
TM		 5306 struct rpc_task_setup task_setup_data = {
5307 .rpc_client = server->client,
5138fde0 5308 .rpc_message = &msg,
c970aa85
TM		 5309 .callback_ops = &nfs4_delegreturn_ops,
5310 .flags = RPC_TASK_ASYNC,
5311 };
e6f81075 5312 int status = 0;
fe650407 5313
8535b2be 5314 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5315 if (data == NULL)
5316 return -ENOMEM;
a9c92d6b 5317 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5318 data->args.fhandle = &data->fh;
5319 data->args.stateid = &data->stateid;
9e907fec 5320 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5321 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5322 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5323 data->res.fattr = &data->fattr;
5324 data->res.server = server;
5138fde0 5325 nfs_fattr_init(data->res.fattr);
26e976a8 5326 data->timestamp = jiffies;
fe650407 5327 data->rpc_status = 0;
ea7c38fe
TM		 5328 data->inode = nfs_igrab_and_active(inode);
5329 if (data->inode)
5330 data->roc = nfs4_roc(inode);
fe650407 5331
c970aa85 5332 task_setup_data.callback_data = data;
1174dd1f
TM		 5333 msg.rpc_argp = &data->args;
5334 msg.rpc_resp = &data->res;
c970aa85 5335 task = rpc_run_task(&task_setup_data);
7a1218a2 5336 if (IS_ERR(task))
fe650407 5337 return PTR_ERR(task);
e6f81075
TM		 5338 if (!issync)
5339 goto out;
fe650407 5340 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5341 if (status != 0)
5342 goto out;
5343 status = data->rpc_status;
e144cbcc
TM		 5344 if (status == 0)
5345 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5346 else
5347 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5348out:
e6b3c4db 5349 rpc_put_task(task);
fe650407 5350 return status;
1da177e4
LT		 5351}
5352
e6f81075 5353int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5354{
5355 struct nfs_server *server = NFS_SERVER(inode);
5356 struct nfs4_exception exception = { };
5357 int err;
5358 do {
e6f81075 5359 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5360 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5361 switch (err) {
5362 case -NFS4ERR_STALE_STATEID:
5363 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5364 case 0:
5365 return 0;
5366 }
5367 err = nfs4_handle_exception(server, err, &exception);
5368 } while (exception.retry);
5369 return err;
5370}
5371
5372#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5373#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5374
5375/*
5376 * sleep, with exponential backoff, and retry the LOCK operation.
5377 */
5378static unsigned long
5379nfs4_set_lock_task_retry(unsigned long timeout)
5380{
416ad3c9 5381 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5382 timeout <<= 1;
5383 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5384 return NFS4_LOCK_MAXTIMEOUT;
5385 return timeout;
5386}
5387
1da177e4
LT		 5388static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5389{
5390 struct inode *inode = state->inode;
5391 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5392 struct nfs_client *clp = server->nfs_client;
911d1aaf 5393 struct nfs_lockt_args arg = {
1da177e4 5394 .fh = NFS_FH(inode),
911d1aaf 5395 .fl = request,
1da177e4 5396 };
911d1aaf
TM		 5397 struct nfs_lockt_res res = {
5398 .denied = request,
1da177e4
LT		 5399 };
5400 struct rpc_message msg = {
5401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5402 .rpc_argp = &arg,
5403 .rpc_resp = &res,
5404 .rpc_cred = state->owner->so_cred,
5405 };
1da177e4
LT		 5406 struct nfs4_lock_state *lsp;
5407 int status;
5408
911d1aaf 5409 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5410 status = nfs4_set_lock_state(state, request);
5411 if (status != 0)
5412 goto out;
5413 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5414 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5415 arg.lock_owner.s_dev = server->s_dev;
7c513058 5416 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5417 switch (status) {
5418 case 0:
5419 request->fl_type = F_UNLCK;
5420 break;
5421 case -NFS4ERR_DENIED:
5422 status = 0;
1da177e4 5423 }
70cc6487 5424 request->fl_ops->fl_release_private(request);
a6f951dd 5425 request->fl_ops = NULL;
8d0a8a9d 5426out:
1da177e4
LT		 5427 return status;
5428}
5429
5430static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5431{
5432 struct nfs4_exception exception = { };
5433 int err;
5434
5435 do {
d1b748a5
TM		 5436 err = _nfs4_proc_getlk(state, cmd, request);
5437 trace_nfs4_get_lock(request, state, cmd, err);
5438 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5439 &exception);
5440 } while (exception.retry);
5441 return err;
5442}
5443
5444static int do_vfs_lock(struct file *file, struct file_lock *fl)
5445{
5446 int res = 0;
5447 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5448 case FL_POSIX:
5449 res = posix_lock_file_wait(file, fl);
5450 break;
5451 case FL_FLOCK:
5452 res = flock_lock_file_wait(file, fl);
5453 break;
5454 default:
5455 BUG();
5456 }
1da177e4
LT		 5457 return res;
5458}
5459
faf5f49c 5460struct nfs4_unlockdata {
911d1aaf
TM		 5461 struct nfs_locku_args arg;
5462 struct nfs_locku_res res;
faf5f49c
TM		 5463 struct nfs4_lock_state *lsp;
5464 struct nfs_open_context *ctx;
911d1aaf
TM		 5465 struct file_lock fl;
5466 const struct nfs_server *server;
26e976a8 5467 unsigned long timestamp;
faf5f49c
TM		 5468};
5469
911d1aaf
TM		 5470static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5471 struct nfs_open_context *ctx,
5472 struct nfs4_lock_state *lsp,
5473 struct nfs_seqid *seqid)
5474{
5475 struct nfs4_unlockdata *p;
5476 struct inode *inode = lsp->ls_state->inode;
5477
8535b2be 5478 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5479 if (p == NULL)
5480 return NULL;
5481 p->arg.fh = NFS_FH(inode);
5482 p->arg.fl = &p->fl;
5483 p->arg.seqid = seqid;
c1d51931 5484 p->res.seqid = seqid;
911d1aaf
TM		 5485 p->lsp = lsp;
5486 atomic_inc(&lsp->ls_count);
5487 /* Ensure we don't close file until we're done freeing locks! */
5488 p->ctx = get_nfs_open_context(ctx);
db2efec0 5489 get_file(fl->fl_file);
911d1aaf
TM		 5490 memcpy(&p->fl, fl, sizeof(p->fl));
5491 p->server = NFS_SERVER(inode);
5492 return p;
5493}
5494
06f814a3 5495static void nfs4_locku_release_calldata(void *data)
faf5f49c 5496{
963d8fe5 5497 struct nfs4_unlockdata *calldata = data;
911d1aaf 5498 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5499 nfs4_put_lock_state(calldata->lsp);
5500 put_nfs_open_context(calldata->ctx);
db2efec0 5501 fput(calldata->fl.fl_file);
06f814a3 5502 kfree(calldata);
faf5f49c
TM		 5503}
5504
963d8fe5 5505static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5506{
963d8fe5 5507 struct nfs4_unlockdata *calldata = data;
faf5f49c 5508
14516c3a
TM		 5509 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5510 return;
faf5f49c
TM		 5511 switch (task->tk_status) {
5512 case 0:
26e976a8 5513 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5514 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5515 if (nfs4_update_lock_stateid(calldata->lsp,
5516 &calldata->res.stateid))
5517 break;
9e33bed5
TM		 5518 case -NFS4ERR_BAD_STATEID:
5519 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5520 case -NFS4ERR_STALE_STATEID:
5521 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5522 if (!nfs4_stateid_match(&calldata->arg.stateid,
5523 &calldata->lsp->ls_stateid))
5524 rpc_restart_call_prepare(task);
faf5f49c
TM		 5525 break;
5526 default:
8478eaa1
N		 5527 if (nfs4_async_handle_error(task, calldata->server,
5528 NULL, NULL) == -EAGAIN)
d00c5d43 5529 rpc_restart_call_prepare(task);
faf5f49c 5530 }
2b1bc308 5531 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5532}
5533
4ce70ada 5534static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5535{
4ce70ada 5536 struct nfs4_unlockdata *calldata = data;
faf5f49c 5537
911d1aaf 5538 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5539 goto out_wait;
425c1d4e 5540 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5541 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5542 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5543 goto out_no_action;
faf5f49c 5544 }
26e976a8 5545 calldata->timestamp = jiffies;
035168ab 5546 if (nfs4_setup_sequence(calldata->server,
a893693c 5547 &calldata->arg.seq_args,
2240a9e2
TM		 5548 &calldata->res.seq_res,
5549 task) != 0)
5550 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5551 return;
5552out_no_action:
5553 task->tk_action = NULL;
5554out_wait:
5555 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5556}
5557
963d8fe5 5558static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5559 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5560 .rpc_call_done = nfs4_locku_done,
06f814a3 5561 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5562};
5563
a5d16a4d
TM		 5564static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5565 struct nfs_open_context *ctx,
5566 struct nfs4_lock_state *lsp,
5567 struct nfs_seqid *seqid)
5568{
5569 struct nfs4_unlockdata *data;
5138fde0
TM		 5570 struct rpc_message msg = {
5571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5572 .rpc_cred = ctx->cred,
5573 };
c970aa85
TM		 5574 struct rpc_task_setup task_setup_data = {
5575 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5576 .rpc_message = &msg,
c970aa85 5577 .callback_ops = &nfs4_locku_ops,
101070ca 5578 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5579 .flags = RPC_TASK_ASYNC,
5580 };
a5d16a4d 5581
fa940720
WAA		 5582 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5583 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5584
137d6aca
FF		 5585 /* Ensure this is an unlock - when canceling a lock, the
5586 * canceled lock is passed in, and it won't be an unlock.
5587 */
5588 fl->fl_type = F_UNLCK;
5589
a5d16a4d
TM		 5590 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5591 if (data == NULL) {
5592 nfs_free_seqid(seqid);
5593 return ERR_PTR(-ENOMEM);
5594 }
5595
a9c92d6b 5596 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5597 msg.rpc_argp = &data->arg;
5598 msg.rpc_resp = &data->res;
c970aa85
TM		 5599 task_setup_data.callback_data = data;
5600 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5601}
5602
faf5f49c
TM		 5603static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5604{
65b62a29
TM		 5605 struct inode *inode = state->inode;
5606 struct nfs4_state_owner *sp = state->owner;
5607 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5608 struct nfs_seqid *seqid;
1da177e4 5609 struct nfs4_lock_state *lsp;
06f814a3 5610 struct rpc_task *task;
b4019c0e 5611 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5612 int status = 0;
536ff0f8 5613 unsigned char fl_flags = request->fl_flags;
faf5f49c 5614
8d0a8a9d 5615 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5616 /* Unlock _before_ we do the RPC call */
5617 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5618 /* Exclude nfs_delegation_claim_locks() */
5619 mutex_lock(&sp->so_delegreturn_mutex);
5620 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5621 down_read(&nfsi->rwsem);
5622 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5623 up_read(&nfsi->rwsem);
65b62a29 5624 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5625 goto out;
19e03c57
TM		 5626 }
5627 up_read(&nfsi->rwsem);
65b62a29 5628 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5629 if (status != 0)
9b073574
TM		 5630 goto out;
5631 /* Is this a delegated lock? */
8d0a8a9d 5632 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5633 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5634 goto out;
b4019c0e
TM		 5635 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5636 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5637 status = -ENOMEM;
badc76dd 5638 if (IS_ERR(seqid))
9b073574 5639 goto out;
cd3758e3 5640 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5641 status = PTR_ERR(task);
5642 if (IS_ERR(task))
9b073574 5643 goto out;
a5d16a4d 5644 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5645 rpc_put_task(task);
9b073574 5646out:
536ff0f8 5647 request->fl_flags = fl_flags;
d1b748a5 5648 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5649 return status;
5650}
5651
a5d16a4d
TM		 5652struct nfs4_lockdata {
5653 struct nfs_lock_args arg;
5654 struct nfs_lock_res res;
5655 struct nfs4_lock_state *lsp;
5656 struct nfs_open_context *ctx;
5657 struct file_lock fl;
26e976a8 5658 unsigned long timestamp;
a5d16a4d
TM		 5659 int rpc_status;
5660 int cancelled;
66179efe 5661 struct nfs_server *server;
a5d16a4d
TM		 5662};
5663
5664static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5665 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5666 gfp_t gfp_mask)
1da177e4 5667{
a5d16a4d
TM		 5668 struct nfs4_lockdata *p;
5669 struct inode *inode = lsp->ls_state->inode;
1da177e4 5670 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5671 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5672
8535b2be 5673 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5674 if (p == NULL)
5675 return NULL;
5676
5677 p->arg.fh = NFS_FH(inode);
5678 p->arg.fl = &p->fl;
8535b2be 5679 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5680 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5681 goto out_free;
b4019c0e
TM		 5682 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5683 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5684 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5685 goto out_free_seqid;
7539bbab 5686 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5687 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5688 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5689 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5690 p->lsp = lsp;
66179efe 5691 p->server = server;
a5d16a4d
TM		 5692 atomic_inc(&lsp->ls_count);
5693 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5694 get_file(fl->fl_file);
a5d16a4d
TM		 5695 memcpy(&p->fl, fl, sizeof(p->fl));
5696 return p;
2f74c0a0
TM		 5697out_free_seqid:
5698 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5699out_free:
5700 kfree(p);
5701 return NULL;
5702}
5703
5704static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5705{
5706 struct nfs4_lockdata *data = calldata;
5707 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5708
3110ff80 5709 dprintk("%s: begin!\n", __func__);
2f74c0a0 5710 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5711 goto out_wait;
a5d16a4d 5712 /* Do we need to do an open_to_lock_owner? */
6b447539 5713 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5714 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5715 goto out_release_lock_seqid;
8fe72bac 5716 }
425c1d4e
TM		 5717 nfs4_stateid_copy(&data->arg.open_stateid,
5718 &state->open_stateid);
a5d16a4d 5719 data->arg.new_lock_owner = 1;
c1d51931 5720 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5721 } else {
2f74c0a0 5722 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5723 nfs4_stateid_copy(&data->arg.lock_stateid,
5724 &data->lsp->ls_stateid);
5725 }
5d422301
TM		 5726 if (!nfs4_valid_open_stateid(state)) {
5727 data->rpc_status = -EBADF;
5728 task->tk_action = NULL;
5729 goto out_release_open_seqid;
5730 }
26e976a8 5731 data->timestamp = jiffies;
035168ab
TM		 5732 if (nfs4_setup_sequence(data->server,
5733 &data->arg.seq_args,
2240a9e2 5734 &data->res.seq_res,
d9afbd1b 5735 task) == 0)
66179efe 5736 return;
5d422301 5737out_release_open_seqid:
2240a9e2
TM		 5738 nfs_release_seqid(data->arg.open_seqid);
5739out_release_lock_seqid:
5740 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5741out_wait:
5742 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5743 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5744}
5745
a5d16a4d
TM		 5746static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5747{
5748 struct nfs4_lockdata *data = calldata;
39071e6f 5749 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5750
3110ff80 5751 dprintk("%s: begin!\n", __func__);
a5d16a4d 5752
14516c3a
TM		 5753 if (!nfs4_sequence_done(task, &data->res.seq_res))
5754 return;
66179efe 5755
a5d16a4d 5756 data->rpc_status = task->tk_status;
425c1d4e
TM		 5757 switch (task->tk_status) {
5758 case 0:
2b0143b5 5759 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5760 data->timestamp);
c69899a1
TM		 5761 if (data->arg.new_lock) {
5762 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5763 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5764 rpc_restart_call_prepare(task);
5765 break;
5766 }
5767 }
39071e6f
TM		 5768 if (data->arg.new_lock_owner != 0) {
5769 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5770 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5771 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5772 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5773 rpc_restart_call_prepare(task);
425c1d4e
TM		 5774 break;
5775 case -NFS4ERR_BAD_STATEID:
5776 case -NFS4ERR_OLD_STATEID:
5777 case -NFS4ERR_STALE_STATEID:
5778 case -NFS4ERR_EXPIRED:
5779 if (data->arg.new_lock_owner != 0) {
5780 if (!nfs4_stateid_match(&data->arg.open_stateid,
5781 &lsp->ls_state->open_stateid))
5782 rpc_restart_call_prepare(task);
5783 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5784 &lsp->ls_stateid))
5785 rpc_restart_call_prepare(task);
a5d16a4d 5786 }
3110ff80 5787 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5788}
5789
5790static void nfs4_lock_release(void *calldata)
5791{
5792 struct nfs4_lockdata *data = calldata;
5793
3110ff80 5794 dprintk("%s: begin!\n", __func__);
2f74c0a0 5795 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5796 if (data->cancelled != 0) {
5797 struct rpc_task *task;
5798 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5799 data->arg.lock_seqid);
5800 if (!IS_ERR(task))
bf294b41 5801 rpc_put_task_async(task);
3110ff80 5802 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5803 } else
5804 nfs_free_seqid(data->arg.lock_seqid);
5805 nfs4_put_lock_state(data->lsp);
5806 put_nfs_open_context(data->ctx);
feaff8e5 5807 fput(data->fl.fl_file);
a5d16a4d 5808 kfree(data);
3110ff80 5809 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5810}
5811
5812static const struct rpc_call_ops nfs4_lock_ops = {
5813 .rpc_call_prepare = nfs4_lock_prepare,
5814 .rpc_call_done = nfs4_lock_done,
5815 .rpc_release = nfs4_lock_release,
5816};
5817
2bee72a6
TM		 5818static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5819{
2bee72a6
TM		 5820 switch (error) {
5821 case -NFS4ERR_ADMIN_REVOKED:
5822 case -NFS4ERR_BAD_STATEID:
ecac799a 5823 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5824 if (new_lock_owner != 0 ||
795a88c9 5825 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5826 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5827 break;
5828 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5829 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5830 case -NFS4ERR_EXPIRED:
5831 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5832 };
5833}
5834
afe6c27c 5835static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5836{
5837 struct nfs4_lockdata *data;
5838 struct rpc_task *task;
5138fde0
TM		 5839 struct rpc_message msg = {
5840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5841 .rpc_cred = state->owner->so_cred,
5842 };
c970aa85
TM		 5843 struct rpc_task_setup task_setup_data = {
5844 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5845 .rpc_message = &msg,
c970aa85 5846 .callback_ops = &nfs4_lock_ops,
101070ca 5847 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5848 .flags = RPC_TASK_ASYNC,
5849 };
a5d16a4d
TM		 5850 int ret;
5851
3110ff80 5852 dprintk("%s: begin!\n", __func__);
cd3758e3 5853 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5854 fl->fl_u.nfs4_fl.owner,
5855 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5856 if (data == NULL)
5857 return -ENOMEM;
5858 if (IS_SETLKW(cmd))
5859 data->arg.block = 1;
a9c92d6b 5860 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5861 msg.rpc_argp = &data->arg;
5862 msg.rpc_resp = &data->res;
c970aa85 5863 task_setup_data.callback_data = data;
8fe72bac
TM		 5864 if (recovery_type > NFS_LOCK_NEW) {
5865 if (recovery_type == NFS_LOCK_RECLAIM)
5866 data->arg.reclaim = NFS_LOCK_RECLAIM;
5867 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5868 } else
5869 data->arg.new_lock = 1;
c970aa85 5870 task = rpc_run_task(&task_setup_data);
7a1218a2 5871 if (IS_ERR(task))
a5d16a4d 5872 return PTR_ERR(task);
a5d16a4d
TM		 5873 ret = nfs4_wait_for_completion_rpc_task(task);
5874 if (ret == 0) {
5875 ret = data->rpc_status;
2bee72a6
TM		 5876 if (ret)
5877 nfs4_handle_setlk_error(data->server, data->lsp,
5878 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5879 } else
5880 data->cancelled = 1;
e6b3c4db 5881 rpc_put_task(task);
3110ff80 5882 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5883 return ret;
1da177e4
LT		 5884}
5885
5886static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5887{
202b50dc 5888 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5889 struct nfs4_exception exception = {
5890 .inode = state->inode,
5891 };
202b50dc
TM		 5892 int err;
5893
5894 do {
42a2d13e
TM		 5895 /* Cache the lock if possible... */
5896 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5897 return 0;
afe6c27c 5898 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5899 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5900 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5901 break;
5902 nfs4_handle_exception(server, err, &exception);
5903 } while (exception.retry);
5904 return err;
1da177e4
LT		 5905}
5906
5907static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5908{
202b50dc 5909 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5910 struct nfs4_exception exception = {
5911 .inode = state->inode,
5912 };
202b50dc
TM		 5913 int err;
5914
6bfc93ef
TM		 5915 err = nfs4_set_lock_state(state, request);
5916 if (err != 0)
5917 return err;
f6de7a39 5918 if (!recover_lost_locks) {
ef1820f9
N		 5919 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5920 return 0;
5921 }
202b50dc 5922 do {
42a2d13e
TM		 5923 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5924 return 0;
afe6c27c 5925 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5926 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5927 switch (err) {
5928 default:
5929 goto out;
5930 case -NFS4ERR_GRACE:
5931 case -NFS4ERR_DELAY:
5932 nfs4_handle_exception(server, err, &exception);
5933 err = 0;
5934 }
202b50dc 5935 } while (exception.retry);
a9ed2e25 5936out:
202b50dc 5937 return err;
1da177e4
LT		 5938}
5939
f062eb6c 5940#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5941/**
5942 * nfs41_check_expired_locks - possibly free a lock stateid
5943 *
5944 * @state: NFSv4 state for an inode
5945 *
5946 * Returns NFS_OK if recovery for this stateid is now finished.
5947 * Otherwise a negative NFS4ERR value is returned.
5948 */
b01dd1d8 5949static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5950{
eb64cf96 5951 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5952 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5953 struct nfs_server *server = NFS_SERVER(state->inode);
5954
b01dd1d8 5955 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5956 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5957 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5958
5959 status = nfs41_test_stateid(server,
5960 &lsp->ls_stateid,
5961 cred);
08cb47fa 5962 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5963 if (status != NFS_OK) {
3e60ffdd
CL		 5964 /* Free the stateid unless the server
5965 * informs us the stateid is unrecognized. */
89af2739
CL		 5966 if (status != -NFS4ERR_BAD_STATEID)
5967 nfs41_free_stateid(server,
ab7cb0df
TM		 5968 &lsp->ls_stateid,
5969 cred);
795a88c9 5970 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5971 ret = status;
5972 }
5973 }
5974 };
5975
5976 return ret;
5977}
5978
5979static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5980{
5981 int status = NFS_OK;
5982
5983 if (test_bit(LK_STATE_IN_USE, &state->flags))
5984 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5985 if (status != NFS_OK)
5986 status = nfs4_lock_expired(state, request);
5987 return status;
f062eb6c
BS		 5988}
5989#endif
5990
1da177e4
LT		 5991static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5992{
19e03c57 5993 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5994 unsigned char fl_flags = request->fl_flags;
8e469ebd 5995 int status = -ENOLCK;
1da177e4 5996
8e469ebd
TM		 5997 if ((fl_flags & FL_POSIX) &&
5998 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5999 goto out;
6bfc93ef 6000 /* Is this a delegated open? */
6bfc93ef
TM		 6001 status = nfs4_set_lock_state(state, request);
6002 if (status != 0)
6003 goto out;
01c3b861
TM		 6004 request->fl_flags |= FL_ACCESS;
6005 status = do_vfs_lock(request->fl_file, request);
6006 if (status < 0)
6007 goto out;
19e03c57 6008 down_read(&nfsi->rwsem);
01c3b861 6009 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6010 /* Yes: cache locks! */
01c3b861 6011 /* ...but avoid races with delegation recall... */
19e03c57
TM		 6012 request->fl_flags = fl_flags & ~FL_SLEEP;
6013 status = do_vfs_lock(request->fl_file, request);
c69899a1 6014 up_read(&nfsi->rwsem);
9a99af49 6015 goto out;
9a99af49 6016 }
19e03c57 6017 up_read(&nfsi->rwsem);
c69899a1 6018 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6019out:
6020 request->fl_flags = fl_flags;
1da177e4
LT		 6021 return status;
6022}
6023
6024static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6025{
a1d0b5ee
TM		 6026 struct nfs4_exception exception = {
6027 .state = state,
05ffe24f 6028 .inode = state->inode,
a1d0b5ee 6029 };
1da177e4
LT		 6030 int err;
6031
6032 do {
965b5d67 6033 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6034 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6035 if (err == -NFS4ERR_DENIED)
6036 err = -EAGAIN;
1da177e4 6037 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6038 err, &exception);
1da177e4
LT		 6039 } while (exception.retry);
6040 return err;
6041}
6042
6043static int
6044nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6045{
6046 struct nfs_open_context *ctx;
6047 struct nfs4_state *state;
6048 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6049 int status;
6050
6051 /* verify open state */
cd3758e3 6052 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6053 state = ctx->state;
6054
6055 if (request->fl_start < 0 || request->fl_end < 0)
6056 return -EINVAL;
6057
d953126a
TM		 6058 if (IS_GETLK(cmd)) {
6059 if (state != NULL)
6060 return nfs4_proc_getlk(state, F_GETLK, request);
6061 return 0;
6062 }
1da177e4
LT		 6063
6064 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6065 return -EINVAL;
6066
d953126a
TM		 6067 if (request->fl_type == F_UNLCK) {
6068 if (state != NULL)
6069 return nfs4_proc_unlck(state, cmd, request);
6070 return 0;
6071 }
1da177e4 6072
d953126a
TM		 6073 if (state == NULL)
6074 return -ENOLCK;
55725513
TM		 6075 /*
6076 * Don't rely on the VFS having checked the file open mode,
6077 * since it won't do this for flock() locks.
6078 */
f44106e2 6079 switch (request->fl_type) {
55725513
TM		 6080 case F_RDLCK:
6081 if (!(filp->f_mode & FMODE_READ))
6082 return -EBADF;
6083 break;
6084 case F_WRLCK:
6085 if (!(filp->f_mode & FMODE_WRITE))
6086 return -EBADF;
6087 }
6088
1da177e4
LT		 6089 do {
6090 status = nfs4_proc_setlk(state, cmd, request);
6091 if ((status != -EAGAIN) || IS_SETLK(cmd))
6092 break;
6093 timeout = nfs4_set_lock_task_retry(timeout);
6094 status = -ERESTARTSYS;
6095 if (signalled())
6096 break;
6097 } while(status < 0);
1da177e4
LT		 6098 return status;
6099}
6100
db4f2e63 6101int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6102{
6103 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6104 int err;
6105
6106 err = nfs4_set_lock_state(state, fl);
6107 if (err != 0)
db4f2e63 6108 return err;
4a706fa0 6109 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6110 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6111}
6b3b5496 6112
cf470c3e
TM		 6113struct nfs_release_lockowner_data {
6114 struct nfs4_lock_state *lsp;
5ae67c4f 6115 struct nfs_server *server;
cf470c3e 6116 struct nfs_release_lockowner_args args;
b7e63a10 6117 struct nfs_release_lockowner_res res;
60ea6812 6118 unsigned long timestamp;
cf470c3e
TM		 6119};
6120
fbd4bfd1
CL		 6121static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6122{
6123 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6124 struct nfs_server *server = data->server;
cb04ad2a
PT		 6125 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6126 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6127 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6128 data->timestamp = jiffies;
fbd4bfd1
CL		 6129}
6130
6131static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6132{
6133 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6134 struct nfs_server *server = data->server;
6135
b7e63a10 6136 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6137
6138 switch (task->tk_status) {
6139 case 0:
6140 renew_lease(server, data->timestamp);
6141 break;
6142 case -NFS4ERR_STALE_CLIENTID:
6143 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6144 nfs4_schedule_lease_recovery(server->nfs_client);
6145 break;
60ea6812
CL		 6146 case -NFS4ERR_LEASE_MOVED:
6147 case -NFS4ERR_DELAY:
8478eaa1
N		 6148 if (nfs4_async_handle_error(task, server,
6149 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6150 rpc_restart_call_prepare(task);
6151 }
fbd4bfd1
CL		 6152}
6153
d3c7b7cc
TM		 6154static void nfs4_release_lockowner_release(void *calldata)
6155{
cf470c3e 6156 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6157 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6158 kfree(calldata);
6159}
6160
17280175 6161static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6162 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6163 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6164 .rpc_release = nfs4_release_lockowner_release,
6165};
6166
f1cdae87
JL		 6167static void
6168nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6169{
cf470c3e 6170 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6171 struct rpc_message msg = {
6172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6173 };
6174
6175 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6176 return;
fbd4bfd1 6177
cf470c3e
TM		 6178 data = kmalloc(sizeof(*data), GFP_NOFS);
6179 if (!data)
f1cdae87 6180 return;
cf470c3e 6181 data->lsp = lsp;
5ae67c4f 6182 data->server = server;
cf470c3e
TM		 6183 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6184 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6185 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6186
cf470c3e 6187 msg.rpc_argp = &data->args;
b7e63a10
TM		 6188 msg.rpc_resp = &data->res;
6189 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6190 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6191}
6192
aa1870af
BF		 6193#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6194
64c2ce8b
AK		 6195static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6196 const void *buf, size_t buflen,
6197 int flags, int type)
6b3b5496 6198{
64c2ce8b
AK		 6199 if (strcmp(key, "") != 0)
6200 return -EINVAL;
4b580ee3 6201
2b0143b5 6202 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6203}
6204
64c2ce8b
AK		 6205static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6206 void *buf, size_t buflen, int type)
6b3b5496 6207{
64c2ce8b
AK		 6208 if (strcmp(key, "") != 0)
6209 return -EINVAL;
aa1870af 6210
2b0143b5 6211 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6212}
6213
64c2ce8b
AK		 6214static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6215 size_t list_len, const char *name,
6216 size_t name_len, int type)
6b3b5496 6217{
64c2ce8b 6218 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6219
2b0143b5 6220 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6221 return 0;
64c2ce8b
AK		 6222
6223 if (list && len <= list_len)
6224 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6225 return len;
6b3b5496
BF		 6226}
6227
c9bccef6
DQ		 6228#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6229static inline int nfs4_server_supports_labels(struct nfs_server *server)
6230{
6231 return server->caps & NFS_CAP_SECURITY_LABEL;
6232}
6233
6234static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6235 const void *buf, size_t buflen,
6236 int flags, int type)
6237{
6238 if (security_ismaclabel(key))
6239 return nfs4_set_security_label(dentry, buf, buflen);
6240
6241 return -EOPNOTSUPP;
6242}
6243
6244static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6245 void *buf, size_t buflen, int type)
6246{
6247 if (security_ismaclabel(key))
2b0143b5 6248 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6249 return -EOPNOTSUPP;
6250}
6251
6252static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6253 size_t list_len, const char *name,
6254 size_t name_len, int type)
6255{
6256 size_t len = 0;
6257
2b0143b5
DH		 6258 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6259 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6260 if (list && len <= list_len)
2b0143b5 6261 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6262 }
6263 return len;
6264}
6265
6266static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6267 .prefix = XATTR_SECURITY_PREFIX,
6268 .list = nfs4_xattr_list_nfs4_label,
6269 .get = nfs4_xattr_get_nfs4_label,
6270 .set = nfs4_xattr_set_nfs4_label,
6271};
6272#endif
6273
6274
533eb461
AA		 6275/*
6276 * nfs_fhget will use either the mounted_on_fileid or the fileid
6277 */
69aaaae1
TM		 6278static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6279{
533eb461
AA		 6280 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6281 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6282 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6283 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6284 return;
6285
6286 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6287 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6288 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6289 fattr->nlink = 2;
6290}
6291
f05d147f
BS		 6292static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6293 const struct qstr *name,
6294 struct nfs4_fs_locations *fs_locations,
6295 struct page *page)
683b57b4
TM		 6296{
6297 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6298 u32 bitmask[3] = {
361e624f 6299 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6300 };
6301 struct nfs4_fs_locations_arg args = {
6302 .dir_fh = NFS_FH(dir),
c228fd3a 6303 .name = name,
683b57b4
TM		 6304 .page = page,
6305 .bitmask = bitmask,
6306 };
22958463
BH		 6307 struct nfs4_fs_locations_res res = {
6308 .fs_locations = fs_locations,
6309 };
683b57b4
TM		 6310 struct rpc_message msg = {
6311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6312 .rpc_argp = &args,
22958463 6313 .rpc_resp = &res,
683b57b4
TM		 6314 };
6315 int status;
6316
3110ff80 6317 dprintk("%s: start\n", __func__);
533eb461
AA		 6318
6319 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6320 * is not supported */
6321 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6322 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6323 else
6324 bitmask[0] |= FATTR4_WORD0_FILEID;
6325
c228fd3a 6326 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6327 fs_locations->server = server;
830b8e33 6328 fs_locations->nlocations = 0;
f05d147f 6329 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6330 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6331 return status;
6332}
6333
f05d147f
BS		 6334int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6335 const struct qstr *name,
6336 struct nfs4_fs_locations *fs_locations,
6337 struct page *page)
db0a9593
BS		 6338{
6339 struct nfs4_exception exception = { };
6340 int err;
6341 do {
078ea3df
TM		 6342 err = _nfs4_proc_fs_locations(client, dir, name,
6343 fs_locations, page);
6344 trace_nfs4_get_fs_locations(dir, name, err);
6345 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6346 &exception);
6347 } while (exception.retry);
6348 return err;
6349}
6350
b03d735b
CL		 6351/*
6352 * This operation also signals the server that this client is
6353 * performing migration recovery. The server can stop returning
6354 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6355 * appended to this compound to identify the client ID which is
6356 * performing recovery.
6357 */
6358static int _nfs40_proc_get_locations(struct inode *inode,
6359 struct nfs4_fs_locations *locations,
6360 struct page *page, struct rpc_cred *cred)
6361{
6362 struct nfs_server *server = NFS_SERVER(inode);
6363 struct rpc_clnt *clnt = server->client;
6364 u32 bitmask[2] = {
6365 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6366 };
6367 struct nfs4_fs_locations_arg args = {
6368 .clientid = server->nfs_client->cl_clientid,
6369 .fh = NFS_FH(inode),
6370 .page = page,
6371 .bitmask = bitmask,
6372 .migration = 1, /* skip LOOKUP */
6373 .renew = 1, /* append RENEW */
6374 };
6375 struct nfs4_fs_locations_res res = {
6376 .fs_locations = locations,
6377 .migration = 1,
6378 .renew = 1,
6379 };
6380 struct rpc_message msg = {
6381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6382 .rpc_argp = &args,
6383 .rpc_resp = &res,
6384 .rpc_cred = cred,
6385 };
6386 unsigned long now = jiffies;
6387 int status;
6388
6389 nfs_fattr_init(&locations->fattr);
6390 locations->server = server;
6391 locations->nlocations = 0;
6392
6393 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6394 nfs4_set_sequence_privileged(&args.seq_args);
6395 status = nfs4_call_sync_sequence(clnt, server, &msg,
6396 &args.seq_args, &res.seq_res);
6397 if (status)
6398 return status;
6399
6400 renew_lease(server, now);
6401 return 0;
6402}
6403
6404#ifdef CONFIG_NFS_V4_1
6405
6406/*
6407 * This operation also signals the server that this client is
6408 * performing migration recovery. The server can stop asserting
6409 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6410 * performing this operation is identified in the SEQUENCE
6411 * operation in this compound.
6412 *
6413 * When the client supports GETATTR(fs_locations_info), it can
6414 * be plumbed in here.
6415 */
6416static int _nfs41_proc_get_locations(struct inode *inode,
6417 struct nfs4_fs_locations *locations,
6418 struct page *page, struct rpc_cred *cred)
6419{
6420 struct nfs_server *server = NFS_SERVER(inode);
6421 struct rpc_clnt *clnt = server->client;
6422 u32 bitmask[2] = {
6423 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6424 };
6425 struct nfs4_fs_locations_arg args = {
6426 .fh = NFS_FH(inode),
6427 .page = page,
6428 .bitmask = bitmask,
6429 .migration = 1, /* skip LOOKUP */
6430 };
6431 struct nfs4_fs_locations_res res = {
6432 .fs_locations = locations,
6433 .migration = 1,
6434 };
6435 struct rpc_message msg = {
6436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6437 .rpc_argp = &args,
6438 .rpc_resp = &res,
6439 .rpc_cred = cred,
6440 };
6441 int status;
6442
6443 nfs_fattr_init(&locations->fattr);
6444 locations->server = server;
6445 locations->nlocations = 0;
6446
6447 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6448 nfs4_set_sequence_privileged(&args.seq_args);
6449 status = nfs4_call_sync_sequence(clnt, server, &msg,
6450 &args.seq_args, &res.seq_res);
6451 if (status == NFS4_OK &&
6452 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6453 status = -NFS4ERR_LEASE_MOVED;
6454 return status;
6455}
6456
6457#endif /* CONFIG_NFS_V4_1 */
6458
6459/**
6460 * nfs4_proc_get_locations - discover locations for a migrated FSID
6461 * @inode: inode on FSID that is migrating
6462 * @locations: result of query
6463 * @page: buffer
6464 * @cred: credential to use for this operation
6465 *
6466 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6467 * operation failed, or a negative errno if a local error occurred.
6468 *
6469 * On success, "locations" is filled in, but if the server has
6470 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6471 * asserted.
6472 *
6473 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6474 * from this client that require migration recovery.
6475 */
6476int nfs4_proc_get_locations(struct inode *inode,
6477 struct nfs4_fs_locations *locations,
6478 struct page *page, struct rpc_cred *cred)
6479{
6480 struct nfs_server *server = NFS_SERVER(inode);
6481 struct nfs_client *clp = server->nfs_client;
6482 const struct nfs4_mig_recovery_ops *ops =
6483 clp->cl_mvops->mig_recovery_ops;
6484 struct nfs4_exception exception = { };
6485 int status;
6486
6487 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6488 (unsigned long long)server->fsid.major,
6489 (unsigned long long)server->fsid.minor,
6490 clp->cl_hostname);
6491 nfs_display_fhandle(NFS_FH(inode), __func__);
6492
6493 do {
6494 status = ops->get_locations(inode, locations, page, cred);
6495 if (status != -NFS4ERR_DELAY)
6496 break;
6497 nfs4_handle_exception(server, status, &exception);
6498 } while (exception.retry);
6499 return status;
6500}
6501
44c99933
CL		 6502/*
6503 * This operation also signals the server that this client is
6504 * performing "lease moved" recovery. The server can stop
6505 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6506 * is appended to this compound to identify the client ID which is
6507 * performing recovery.
6508 */
6509static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6510{
6511 struct nfs_server *server = NFS_SERVER(inode);
6512 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6513 struct rpc_clnt *clnt = server->client;
6514 struct nfs4_fsid_present_arg args = {
6515 .fh = NFS_FH(inode),
6516 .clientid = clp->cl_clientid,
6517 .renew = 1, /* append RENEW */
6518 };
6519 struct nfs4_fsid_present_res res = {
6520 .renew = 1,
6521 };
6522 struct rpc_message msg = {
6523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6524 .rpc_argp = &args,
6525 .rpc_resp = &res,
6526 .rpc_cred = cred,
6527 };
6528 unsigned long now = jiffies;
6529 int status;
6530
6531 res.fh = nfs_alloc_fhandle();
6532 if (res.fh == NULL)
6533 return -ENOMEM;
6534
6535 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6536 nfs4_set_sequence_privileged(&args.seq_args);
6537 status = nfs4_call_sync_sequence(clnt, server, &msg,
6538 &args.seq_args, &res.seq_res);
6539 nfs_free_fhandle(res.fh);
6540 if (status)
6541 return status;
6542
6543 do_renew_lease(clp, now);
6544 return 0;
6545}
6546
6547#ifdef CONFIG_NFS_V4_1
6548
6549/*
6550 * This operation also signals the server that this client is
6551 * performing "lease moved" recovery. The server can stop asserting
6552 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6553 * this operation is identified in the SEQUENCE operation in this
6554 * compound.
6555 */
6556static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6557{
6558 struct nfs_server *server = NFS_SERVER(inode);
6559 struct rpc_clnt *clnt = server->client;
6560 struct nfs4_fsid_present_arg args = {
6561 .fh = NFS_FH(inode),
6562 };
6563 struct nfs4_fsid_present_res res = {
6564 };
6565 struct rpc_message msg = {
6566 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6567 .rpc_argp = &args,
6568 .rpc_resp = &res,
6569 .rpc_cred = cred,
6570 };
6571 int status;
6572
6573 res.fh = nfs_alloc_fhandle();
6574 if (res.fh == NULL)
6575 return -ENOMEM;
6576
6577 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6578 nfs4_set_sequence_privileged(&args.seq_args);
6579 status = nfs4_call_sync_sequence(clnt, server, &msg,
6580 &args.seq_args, &res.seq_res);
6581 nfs_free_fhandle(res.fh);
6582 if (status == NFS4_OK &&
6583 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6584 status = -NFS4ERR_LEASE_MOVED;
6585 return status;
6586}
6587
6588#endif /* CONFIG_NFS_V4_1 */
6589
6590/**
6591 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6592 * @inode: inode on FSID to check
6593 * @cred: credential to use for this operation
6594 *
6595 * Server indicates whether the FSID is present, moved, or not
6596 * recognized. This operation is necessary to clear a LEASE_MOVED
6597 * condition for this client ID.
6598 *
6599 * Returns NFS4_OK if the FSID is present on this server,
6600 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6601 * NFS4ERR code if some error occurred on the server, or a
6602 * negative errno if a local failure occurred.
6603 */
6604int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6605{
6606 struct nfs_server *server = NFS_SERVER(inode);
6607 struct nfs_client *clp = server->nfs_client;
6608 const struct nfs4_mig_recovery_ops *ops =
6609 clp->cl_mvops->mig_recovery_ops;
6610 struct nfs4_exception exception = { };
6611 int status;
6612
6613 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6614 (unsigned long long)server->fsid.major,
6615 (unsigned long long)server->fsid.minor,
6616 clp->cl_hostname);
6617 nfs_display_fhandle(NFS_FH(inode), __func__);
6618
6619 do {
6620 status = ops->fsid_present(inode, cred);
6621 if (status != -NFS4ERR_DELAY)
6622 break;
6623 nfs4_handle_exception(server, status, &exception);
6624 } while (exception.retry);
6625 return status;
6626}
6627
5ec16a85 6628/**
a5250def
WAA		 6629 * If 'use_integrity' is true and the state managment nfs_client
6630 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6631 * and the machine credential as per RFC3530bis and RFC5661 Security
6632 * Considerations sections. Otherwise, just use the user cred with the
6633 * filesystem's rpc_client.
5ec16a85 6634 */
a5250def 6635static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6636{
6637 int status;
6638 struct nfs4_secinfo_arg args = {
6639 .dir_fh = NFS_FH(dir),
6640 .name = name,
6641 };
6642 struct nfs4_secinfo_res res = {
6643 .flavors = flavors,
6644 };
6645 struct rpc_message msg = {
6646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6647 .rpc_argp = &args,
6648 .rpc_resp = &res,
6649 };
a5250def 6650 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6651 struct rpc_cred *cred = NULL;
a5250def
WAA		 6652
6653 if (use_integrity) {
6654 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6655 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6656 msg.rpc_cred = cred;
a5250def 6657 }
5a5ea0d4
BS		 6658
6659 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6660
6661 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6662 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6663
a5250def
WAA		 6664 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6665 &res.seq_res, 0);
5a5ea0d4 6666 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6667
7cb852df
WAA		 6668 if (cred)
6669 put_rpccred(cred);
a5250def 6670
5a5ea0d4
BS		 6671 return status;
6672}
6673
72de53ec
BS		 6674int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6675 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6676{
6677 struct nfs4_exception exception = { };
6678 int err;
6679 do {
a5250def
WAA		 6680 err = -NFS4ERR_WRONGSEC;
6681
6682 /* try to use integrity protection with machine cred */
6683 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6684 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6685
6686 /*
6687 * if unable to use integrity protection, or SECINFO with
6688 * integrity protection returns NFS4ERR_WRONGSEC (which is
6689 * disallowed by spec, but exists in deployed servers) use
6690 * the current filesystem's rpc_client and the user cred.
6691 */
6692 if (err == -NFS4ERR_WRONGSEC)
6693 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6694
078ea3df
TM		 6695 trace_nfs4_secinfo(dir, name, err);
6696 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6697 &exception);
6698 } while (exception.retry);
6699 return err;
6700}
6701
557134a3 6702#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6703/*
6704 * Check the exchange flags returned by the server for invalid flags, having
6705 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6706 * DS flags set.
6707 */
6708static int nfs4_check_cl_exchange_flags(u32 flags)
6709{
6710 if (flags & ~EXCHGID4_FLAG_MASK_R)
6711 goto out_inval;
6712 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6713 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6714 goto out_inval;
6715 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6716 goto out_inval;
6717 return NFS_OK;
6718out_inval:
6719 return -NFS4ERR_INVAL;
6720}
6721
78fe0f41 6722static bool
79d4e1f0
CL		 6723nfs41_same_server_scope(struct nfs41_server_scope *a,
6724 struct nfs41_server_scope *b)
78fe0f41
WAA		 6725{
6726 if (a->server_scope_sz == b->server_scope_sz &&
6727 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6728 return true;
6729
6730 return false;
6731}
6732
7c44f1ae
WAA		 6733/*
6734 * nfs4_proc_bind_conn_to_session()
6735 *
6736 * The 4.1 client currently uses the same TCP connection for the
6737 * fore and backchannel.
6738 */
2cf047c9 6739int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6740{
6741 int status;
71a097c6
TM		 6742 struct nfs41_bind_conn_to_session_args args = {
6743 .client = clp,
6744 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6745 };
7c44f1ae
WAA		 6746 struct nfs41_bind_conn_to_session_res res;
6747 struct rpc_message msg = {
6748 .rpc_proc =
6749 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6750 .rpc_argp = &args,
7c44f1ae 6751 .rpc_resp = &res,
2cf047c9 6752 .rpc_cred = cred,
7c44f1ae
WAA		 6753 };
6754
6755 dprintk("--> %s\n", __func__);
7c44f1ae 6756
71a097c6
TM		 6757 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6758 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6759 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6760
6761 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6762 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6763 if (status == 0) {
71a097c6 6764 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6765 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6766 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6767 status = -EIO;
71a097c6 6768 goto out;
7c44f1ae 6769 }
71a097c6 6770 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6771 dprintk("NFS: %s: Unexpected direction from server\n",
6772 __func__);
6773 status = -EIO;
71a097c6 6774 goto out;
7c44f1ae 6775 }
71a097c6 6776 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6777 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6778 __func__);
6779 status = -EIO;
71a097c6 6780 goto out;
7c44f1ae
WAA		 6781 }
6782 }
7c44f1ae
WAA		 6783out:
6784 dprintk("<-- %s status= %d\n", __func__, status);
6785 return status;
6786}
6787
99fe60d0 6788/*
fa940720
WAA		 6789 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6790 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6791 */
6792static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6793 .how = SP4_MACH_CRED,
6794 .enforce.u.words = {
6795 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6796 1 << (OP_EXCHANGE_ID - 32) |
6797 1 << (OP_CREATE_SESSION - 32) |
6798 1 << (OP_DESTROY_SESSION - 32) |
6799 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6800 },
6801 .allow.u.words = {
6802 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6803 1 << (OP_LOCKU) |
6804 1 << (OP_COMMIT),
8b5bee2e 6805 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6806 1 << (OP_SECINFO_NO_NAME - 32) |
6807 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6808 1 << (OP_FREE_STATEID - 32) |
6809 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6810 }
6811};
6812
6813/*
6814 * Select the state protection mode for client `clp' given the server results
6815 * from exchange_id in `sp'.
99fe60d0 6816 *
2031cd1a
WAA		 6817 * Returns 0 on success, negative errno otherwise.
6818 */
6819static int nfs4_sp4_select_mode(struct nfs_client *clp,
6820 struct nfs41_state_protection *sp)
6821{
6822 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6823 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6824 1 << (OP_EXCHANGE_ID - 32) |
6825 1 << (OP_CREATE_SESSION - 32) |
6826 1 << (OP_DESTROY_SESSION - 32) |
6827 1 << (OP_DESTROY_CLIENTID - 32)
6828 };
6829 unsigned int i;
6830
6831 if (sp->how == SP4_MACH_CRED) {
6832 /* Print state protect result */
6833 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6834 for (i = 0; i <= LAST_NFS4_OP; i++) {
6835 if (test_bit(i, sp->enforce.u.longs))
6836 dfprintk(MOUNT, " enforce op %d\n", i);
6837 if (test_bit(i, sp->allow.u.longs))
6838 dfprintk(MOUNT, " allow op %d\n", i);
6839 }
6840
6841 /* make sure nothing is on enforce list that isn't supported */
6842 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6843 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6844 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6845 return -EINVAL;
6846 }
6847 }
6848
6849 /*
6850 * Minimal mode - state operations are allowed to use machine
6851 * credential. Note this already happens by default, so the
6852 * client doesn't have to do anything more than the negotiation.
6853 *
6854 * NOTE: we don't care if EXCHANGE_ID is in the list -
6855 * we're already using the machine cred for exchange_id
6856 * and will never use a different cred.
6857 */
6858 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6859 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6860 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6861 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6862 dfprintk(MOUNT, "sp4_mach_cred:\n");
6863 dfprintk(MOUNT, " minimal mode enabled\n");
6864 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6865 } else {
6866 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6867 return -EINVAL;
6868 }
fa940720
WAA		 6869
6870 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6871 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6872 dfprintk(MOUNT, " cleanup mode enabled\n");
6873 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6874 }
8b5bee2e
WAA		 6875
6876 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6877 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6878 dfprintk(MOUNT, " secinfo mode enabled\n");
6879 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6880 }
3787d506
WAA		 6881
6882 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6883 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6884 dfprintk(MOUNT, " stateid mode enabled\n");
6885 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6886 }
8c21c62c
WAA		 6887
6888 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6889 dfprintk(MOUNT, " write mode enabled\n");
6890 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6891 }
6892
6893 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6894 dfprintk(MOUNT, " commit mode enabled\n");
6895 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6896 }
2031cd1a
WAA		 6897 }
6898
6899 return 0;
6900}
6901
6902/*
6903 * _nfs4_proc_exchange_id()
6bbb4ae8 6904 *
2031cd1a 6905 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6906 */
2031cd1a
WAA		 6907static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6908 u32 sp4_how)
99fe60d0
BH		 6909{
6910 nfs4_verifier verifier;
6911 struct nfs41_exchange_id_args args = {
cd93710e 6912 .verifier = &verifier,
99fe60d0 6913 .client = clp,
cd3fadec 6914#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6915 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6916 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6917 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6918#else
6919 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6920 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6921#endif
99fe60d0
BH		 6922 };
6923 struct nfs41_exchange_id_res res = {
32b01310 6924 0
99fe60d0
BH		 6925 };
6926 int status;
6927 struct rpc_message msg = {
6928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6929 .rpc_argp = &args,
6930 .rpc_resp = &res,
6931 .rpc_cred = cred,
6932 };
99fe60d0 6933
f092075d 6934 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6935
6936 status = nfs4_init_uniform_client_string(clp);
6937 if (status)
3a6bb738 6938 goto out;
3a6bb738
JL		 6939
6940 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6941 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6942 clp->cl_owner_id);
99fe60d0 6943
acdeb69d 6944 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6945 GFP_NOFS);
acdeb69d 6946 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6947 status = -ENOMEM;
6948 goto out;
6949 }
78fe0f41 6950
79d4e1f0 6951 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6952 GFP_NOFS);
177313f1 6953 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6954 status = -ENOMEM;
acdeb69d 6955 goto out_server_owner;
abe9a6d5 6956 }
78fe0f41 6957
bbafffd2 6958 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6959 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6960 status = -ENOMEM;
6961 goto out_server_scope;
6962 }
6963
2031cd1a
WAA		 6964 switch (sp4_how) {
6965 case SP4_NONE:
6966 args.state_protect.how = SP4_NONE;
6967 break;
6968
6969 case SP4_MACH_CRED:
6970 args.state_protect = nfs4_sp4_mach_cred_request;
6971 break;
6972
6973 default:
6974 /* unsupported! */
6975 WARN_ON_ONCE(1);
6976 status = -EINVAL;
6b55970b 6977 goto out_impl_id;
2031cd1a
WAA		 6978 }
6979
1bd714f2 6980 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6981 trace_nfs4_exchange_id(clp, status);
177313f1 6982 if (status == 0)
32b01310 6983 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6984
2031cd1a
WAA		 6985 if (status == 0)
6986 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6987
acdeb69d 6988 if (status == 0) {
32b01310 6989 clp->cl_clientid = res.clientid;
e11259f9
TM		 6990 clp->cl_exchange_flags = res.flags;
6991 /* Client ID is not confirmed */
6992 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6993 clear_bit(NFS4_SESSION_ESTABLISHED,
6994 &clp->cl_session->session_state);
32b01310 6995 clp->cl_seqid = res.seqid;
e11259f9 6996 }
32b01310 6997
acdeb69d
CL		 6998 kfree(clp->cl_serverowner);
6999 clp->cl_serverowner = res.server_owner;
7000 res.server_owner = NULL;
78fe0f41 7001
7d2ed9ac 7002 /* use the most recent implementation id */
59155546
CL		 7003 kfree(clp->cl_implid);
7004 clp->cl_implid = res.impl_id;
6b55970b 7005 res.impl_id = NULL;
7d2ed9ac 7006
177313f1 7007 if (clp->cl_serverscope != NULL &&
79d4e1f0 7008 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7009 res.server_scope)) {
7010 dprintk("%s: server_scope mismatch detected\n",
7011 __func__);
7012 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7013 kfree(clp->cl_serverscope);
7014 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7015 }
7016
177313f1 7017 if (clp->cl_serverscope == NULL) {
79d4e1f0 7018 clp->cl_serverscope = res.server_scope;
6b55970b 7019 res.server_scope = NULL;
abe9a6d5 7020 }
6b55970b 7021 }
7d2ed9ac 7022
6b55970b
KM		 7023out_impl_id:
7024 kfree(res.impl_id);
7d2ed9ac 7025out_server_scope:
abe9a6d5 7026 kfree(res.server_scope);
6b55970b
KM		 7027out_server_owner:
7028 kfree(res.server_owner);
abe9a6d5 7029out:
177313f1 7030 if (clp->cl_implid != NULL)
6bbb4ae8 7031 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7032 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7033 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7034 clp->cl_implid->date.seconds,
7035 clp->cl_implid->date.nseconds);
6bbb4ae8 7036 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7037 return status;
7038}
7039
2031cd1a
WAA		 7040/*
7041 * nfs4_proc_exchange_id()
7042 *
7043 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7044 *
7045 * Since the clientid has expired, all compounds using sessions
7046 * associated with the stale clientid will be returning
7047 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7048 * be in some phase of session reset.
7049 *
7050 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7051 */
7052int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7053{
7054 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7055 int status;
7056
7057 /* try SP4_MACH_CRED if krb5i/p */
7058 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7059 authflavor == RPC_AUTH_GSS_KRB5P) {
7060 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7061 if (!status)
7062 return 0;
7063 }
7064
7065 /* try SP4_NONE */
7066 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7067}
7068
66245539
TM		 7069static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7070 struct rpc_cred *cred)
7071{
7072 struct rpc_message msg = {
7073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7074 .rpc_argp = clp,
7075 .rpc_cred = cred,
7076 };
7077 int status;
7078
7079 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7080 trace_nfs4_destroy_clientid(clp, status);
66245539 7081 if (status)
02c67525 7082 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7083 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7084 return status;
7085}
7086
7087static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7088 struct rpc_cred *cred)
7089{
7090 unsigned int loop;
7091 int ret;
7092
7093 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7094 ret = _nfs4_proc_destroy_clientid(clp, cred);
7095 switch (ret) {
7096 case -NFS4ERR_DELAY:
7097 case -NFS4ERR_CLIENTID_BUSY:
7098 ssleep(1);
7099 break;
7100 default:
7101 return ret;
7102 }
7103 }
7104 return 0;
7105}
7106
7107int nfs4_destroy_clientid(struct nfs_client *clp)
7108{
7109 struct rpc_cred *cred;
7110 int ret = 0;
7111
7112 if (clp->cl_mvops->minor_version < 1)
7113 goto out;
7114 if (clp->cl_exchange_flags == 0)
7115 goto out;
05f4c350
CL		 7116 if (clp->cl_preserve_clid)
7117 goto out;
73d8bde5 7118 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7119 ret = nfs4_proc_destroy_clientid(clp, cred);
7120 if (cred)
7121 put_rpccred(cred);
7122 switch (ret) {
7123 case 0:
7124 case -NFS4ERR_STALE_CLIENTID:
7125 clp->cl_exchange_flags = 0;
7126 }
7127out:
7128 return ret;
7129}
7130
2050f0cc
AA		 7131struct nfs4_get_lease_time_data {
7132 struct nfs4_get_lease_time_args *args;
7133 struct nfs4_get_lease_time_res *res;
7134 struct nfs_client *clp;
7135};
7136
7137static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7138 void *calldata)
7139{
2050f0cc
AA		 7140 struct nfs4_get_lease_time_data *data =
7141 (struct nfs4_get_lease_time_data *)calldata;
7142
7143 dprintk("--> %s\n", __func__);
7144 /* just setup sequence, do not trigger session recovery
7145 since we're invoked within one */
d9afbd1b
TM		 7146 nfs41_setup_sequence(data->clp->cl_session,
7147 &data->args->la_seq_args,
7148 &data->res->lr_seq_res,
7149 task);
2050f0cc
AA		 7150 dprintk("<-- %s\n", __func__);
7151}
7152
7153/*
7154 * Called from nfs4_state_manager thread for session setup, so don't recover
7155 * from sequence operation or clientid errors.
7156 */
7157static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7158{
7159 struct nfs4_get_lease_time_data *data =
7160 (struct nfs4_get_lease_time_data *)calldata;
7161
7162 dprintk("--> %s\n", __func__);
14516c3a
TM		 7163 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7164 return;
2050f0cc
AA		 7165 switch (task->tk_status) {
7166 case -NFS4ERR_DELAY:
7167 case -NFS4ERR_GRACE:
7168 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7169 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7170 task->tk_status = 0;
a8a4ae3a
AA		 7171 /* fall through */
7172 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7173 rpc_restart_call_prepare(task);
2050f0cc
AA		 7174 return;
7175 }
2050f0cc
AA		 7176 dprintk("<-- %s\n", __func__);
7177}
7178
17280175 7179static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7180 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7181 .rpc_call_done = nfs4_get_lease_time_done,
7182};
7183
7184int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7185{
7186 struct rpc_task *task;
7187 struct nfs4_get_lease_time_args args;
7188 struct nfs4_get_lease_time_res res = {
7189 .lr_fsinfo = fsinfo,
7190 };
7191 struct nfs4_get_lease_time_data data = {
7192 .args = &args,
7193 .res = &res,
7194 .clp = clp,
7195 };
7196 struct rpc_message msg = {
7197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7198 .rpc_argp = &args,
7199 .rpc_resp = &res,
7200 };
7201 struct rpc_task_setup task_setup = {
7202 .rpc_client = clp->cl_rpcclient,
7203 .rpc_message = &msg,
7204 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7205 .callback_data = &data,
7206 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7207 };
7208 int status;
7209
a9c92d6b 7210 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7211 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7212 dprintk("--> %s\n", __func__);
7213 task = rpc_run_task(&task_setup);
7214
7215 if (IS_ERR(task))
7216 status = PTR_ERR(task);
7217 else {
7218 status = task->tk_status;
7219 rpc_put_task(task);
7220 }
7221 dprintk("<-- %s return %d\n", __func__, status);
7222
7223 return status;
7224}
7225
fc931582
AA		 7226/*
7227 * Initialize the values to be used by the client in CREATE_SESSION
7228 * If nfs4_init_session set the fore channel request and response sizes,
7229 * use them.
7230 *
7231 * Set the back channel max_resp_sz_cached to zero to force the client to
7232 * always set csa_cachethis to FALSE because the current implementation
7233 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7234 */
7235static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7236{
18aad3d5
AA		 7237 unsigned int max_rqst_sz, max_resp_sz;
7238
7239 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7240 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7241
fc931582 7242 /* Fore channel attributes */
18aad3d5
AA		 7243 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7244 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7245 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7246 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7247
7248 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7249 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7250 __func__,
7251 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7252 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7253
7254 /* Back channel attributes */
fc931582
AA		 7255 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7256 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7257 args->bc_attrs.max_resp_sz_cached = 0;
7258 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7259 args->bc_attrs.max_reqs = 1;
7260
7261 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7262 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7263 __func__,
7264 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7265 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7266 args->bc_attrs.max_reqs);
7267}
7268
79969dd1
TM		 7269static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7270 struct nfs41_create_session_res *res)
8d35301d 7271{
43c2e885 7272 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7273 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7274
43c2e885
BF		 7275 if (rcvd->max_resp_sz > sent->max_resp_sz)
7276 return -EINVAL;
7277 /*
7278 * Our requested max_ops is the minimum we need; we're not
7279 * prepared to break up compounds into smaller pieces than that.
7280 * So, no point even trying to continue if the server won't
7281 * cooperate:
7282 */
7283 if (rcvd->max_ops < sent->max_ops)
7284 return -EINVAL;
7285 if (rcvd->max_reqs == 0)
7286 return -EINVAL;
b4b9a0c1
VG		 7287 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7288 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7289 return 0;
8d35301d
AA		 7290}
7291
79969dd1
TM		 7292static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7293 struct nfs41_create_session_res *res)
43c2e885
BF		 7294{
7295 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7296 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7297
b1c0df5f
TM		 7298 if (!(res->flags & SESSION4_BACK_CHAN))
7299 goto out;
43c2e885
BF		 7300 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7301 return -EINVAL;
7302 if (rcvd->max_resp_sz < sent->max_resp_sz)
7303 return -EINVAL;
7304 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7305 return -EINVAL;
7306 /* These would render the backchannel useless: */
b4b9a0c1 7307 if (rcvd->max_ops != sent->max_ops)
43c2e885 7308 return -EINVAL;
b4b9a0c1 7309 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7310 return -EINVAL;
b1c0df5f 7311out:
43c2e885
BF		 7312 return 0;
7313}
8d35301d 7314
8d35301d 7315static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7316 struct nfs41_create_session_res *res)
8d35301d 7317{
43c2e885 7318 int ret;
8d35301d 7319
79969dd1 7320 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7321 if (ret)
7322 return ret;
79969dd1
TM		 7323 return nfs4_verify_back_channel_attrs(args, res);
7324}
7325
7326static void nfs4_update_session(struct nfs4_session *session,
7327 struct nfs41_create_session_res *res)
7328{
7329 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7330 /* Mark client id and session as being confirmed */
7331 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7332 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7333 session->flags = res->flags;
7334 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7335 if (res->flags & SESSION4_BACK_CHAN)
7336 memcpy(&session->bc_attrs, &res->bc_attrs,
7337 sizeof(session->bc_attrs));
8d35301d
AA		 7338}
7339
848f5bda
TM		 7340static int _nfs4_proc_create_session(struct nfs_client *clp,
7341 struct rpc_cred *cred)
fc931582
AA		 7342{
7343 struct nfs4_session *session = clp->cl_session;
7344 struct nfs41_create_session_args args = {
7345 .client = clp,
79969dd1
TM		 7346 .clientid = clp->cl_clientid,
7347 .seqid = clp->cl_seqid,
fc931582
AA		 7348 .cb_program = NFS4_CALLBACK,
7349 };
79969dd1
TM		 7350 struct nfs41_create_session_res res;
7351
fc931582
AA		 7352 struct rpc_message msg = {
7353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7354 .rpc_argp = &args,
7355 .rpc_resp = &res,
848f5bda 7356 .rpc_cred = cred,
fc931582
AA		 7357 };
7358 int status;
7359
7360 nfs4_init_channel_attrs(&args);
0f91421e 7361 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7362
1bd714f2 7363 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7364 trace_nfs4_create_session(clp, status);
fc931582 7365
43095d39 7366 if (!status) {
8d35301d 7367 /* Verify the session's negotiated channel_attrs values */
79969dd1 7368 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7369 /* Increment the clientid slot sequence id */
79969dd1
TM		 7370 if (clp->cl_seqid == res.seqid)
7371 clp->cl_seqid++;
7372 if (status)
7373 goto out;
7374 nfs4_update_session(session, &res);
fc931582 7375 }
79969dd1 7376out:
fc931582
AA		 7377 return status;
7378}
7379
7380/*
7381 * Issues a CREATE_SESSION operation to the server.
7382 * It is the responsibility of the caller to verify the session is
7383 * expired before calling this routine.
7384 */
848f5bda 7385int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7386{
7387 int status;
7388 unsigned *ptr;
fc931582
AA		 7389 struct nfs4_session *session = clp->cl_session;
7390
7391 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7392
848f5bda 7393 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7394 if (status)
7395 goto out;
7396
aacd5537
AA		 7397 /* Init or reset the session slot tables */
7398 status = nfs4_setup_session_slot_tables(session);
7399 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7400 if (status)
7401 goto out;
7402
7403 ptr = (unsigned *)&session->sess_id.data[0];
7404 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7405 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7406out:
7407 dprintk("<-- %s\n", __func__);
7408 return status;
7409}
7410
0f3e66c6
AA		 7411/*
7412 * Issue the over-the-wire RPC DESTROY_SESSION.
7413 * The caller must serialize access to this routine.
7414 */
848f5bda
TM		 7415int nfs4_proc_destroy_session(struct nfs4_session *session,
7416 struct rpc_cred *cred)
0f3e66c6 7417{
848f5bda
TM		 7418 struct rpc_message msg = {
7419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7420 .rpc_argp = session,
7421 .rpc_cred = cred,
7422 };
0f3e66c6 7423 int status = 0;
0f3e66c6
AA		 7424
7425 dprintk("--> nfs4_proc_destroy_session\n");
7426
7427 /* session is still being setup */
e11259f9
TM		 7428 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7429 return 0;
0f3e66c6 7430
1bd714f2 7431 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7432 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7433
7434 if (status)
08106ac7 7435 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7436 "Session has been destroyed regardless...\n", status);
7437
7438 dprintk("<-- nfs4_proc_destroy_session\n");
7439 return status;
7440}
7441
fc01cea9
AA		 7442/*
7443 * Renew the cl_session lease.
7444 */
d5f8d3fe
TM		 7445struct nfs4_sequence_data {
7446 struct nfs_client *clp;
7447 struct nfs4_sequence_args args;
7448 struct nfs4_sequence_res res;
7449};
7450
dc96aef9
AB		 7451static void nfs41_sequence_release(void *data)
7452{
d5f8d3fe
TM		 7453 struct nfs4_sequence_data *calldata = data;
7454 struct nfs_client *clp = calldata->clp;
dc96aef9 7455
7135840f
AB		 7456 if (atomic_read(&clp->cl_count) > 1)
7457 nfs4_schedule_state_renewal(clp);
7458 nfs_put_client(clp);
d5f8d3fe 7459 kfree(calldata);
dc96aef9
AB		 7460}
7461
aa5190d0
TM		 7462static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7463{
7464 switch(task->tk_status) {
7465 case -NFS4ERR_DELAY:
aa5190d0
TM		 7466 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7467 return -EAGAIN;
7468 default:
0400a6b0 7469 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7470 }
7471 return 0;
7472}
7473
dc96aef9 7474static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7475{
d5f8d3fe
TM		 7476 struct nfs4_sequence_data *calldata = data;
7477 struct nfs_client *clp = calldata->clp;
fc01cea9 7478
14516c3a
TM		 7479 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7480 return;
fc01cea9 7481
c6d01c6f 7482 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7483 if (task->tk_status < 0) {
7484 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7485 if (atomic_read(&clp->cl_count) == 1)
7486 goto out;
fc01cea9 7487
aa5190d0
TM		 7488 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7489 rpc_restart_call_prepare(task);
fc01cea9
AA		 7490 return;
7491 }
7492 }
fc01cea9 7493 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7494out:
fc01cea9
AA		 7495 dprintk("<-- %s\n", __func__);
7496}
7497
7498static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7499{
d5f8d3fe
TM		 7500 struct nfs4_sequence_data *calldata = data;
7501 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7502 struct nfs4_sequence_args *args;
7503 struct nfs4_sequence_res *res;
7504
fc01cea9
AA		 7505 args = task->tk_msg.rpc_argp;
7506 res = task->tk_msg.rpc_resp;
7507
d9afbd1b 7508 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7509}
7510
7511static const struct rpc_call_ops nfs41_sequence_ops = {
7512 .rpc_call_done = nfs41_sequence_call_done,
7513 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7514 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7515};
7516
8fe72bac
TM		 7517static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7518 struct rpc_cred *cred,
7519 bool is_privileged)
fc01cea9 7520{
d5f8d3fe 7521 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7522 struct rpc_message msg = {
7523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7524 .rpc_cred = cred,
7525 };
71ac6da9
TM		 7526 struct rpc_task_setup task_setup_data = {
7527 .rpc_client = clp->cl_rpcclient,
7528 .rpc_message = &msg,
8fe72bac 7529 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7530 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7531 };
fc01cea9 7532
7135840f 7533 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7534 return ERR_PTR(-EIO);
dfb4f309 7535 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7536 if (calldata == NULL) {
7135840f 7537 nfs_put_client(clp);
71ac6da9 7538 return ERR_PTR(-ENOMEM);
fc01cea9 7539 }
a9c92d6b 7540 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7541 if (is_privileged)
7542 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7543 msg.rpc_argp = &calldata->args;
7544 msg.rpc_resp = &calldata->res;
7545 calldata->clp = clp;
71ac6da9 7546 task_setup_data.callback_data = calldata;
fc01cea9 7547
71ac6da9
TM		 7548 return rpc_run_task(&task_setup_data);
7549}
7550
2f60ea6b 7551static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7552{
7553 struct rpc_task *task;
7554 int ret = 0;
7555
2f60ea6b 7556 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7557 return -EAGAIN;
8fe72bac 7558 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7559 if (IS_ERR(task))
7560 ret = PTR_ERR(task);
7561 else
bf294b41 7562 rpc_put_task_async(task);
71ac6da9
TM		 7563 dprintk("<-- %s status=%d\n", __func__, ret);
7564 return ret;
7565}
7566
7567static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7568{
7569 struct rpc_task *task;
7570 int ret;
7571
8fe72bac 7572 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7573 if (IS_ERR(task)) {
7574 ret = PTR_ERR(task);
7575 goto out;
7576 }
7577 ret = rpc_wait_for_completion_task(task);
be824167 7578 if (!ret)
71ac6da9
TM		 7579 ret = task->tk_status;
7580 rpc_put_task(task);
7581out:
7582 dprintk("<-- %s status=%d\n", __func__, ret);
7583 return ret;
fc01cea9
AA		 7584}
7585
fce5c838
RL		 7586struct nfs4_reclaim_complete_data {
7587 struct nfs_client *clp;
7588 struct nfs41_reclaim_complete_args arg;
7589 struct nfs41_reclaim_complete_res res;
7590};
7591
7592static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7593{
7594 struct nfs4_reclaim_complete_data *calldata = data;
7595
d9afbd1b
TM		 7596 nfs41_setup_sequence(calldata->clp->cl_session,
7597 &calldata->arg.seq_args,
7598 &calldata->res.seq_res,
7599 task);
fce5c838
RL		 7600}
7601
aa5190d0
TM		 7602static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7603{
7604 switch(task->tk_status) {
7605 case 0:
7606 case -NFS4ERR_COMPLETE_ALREADY:
7607 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7608 break;
7609 case -NFS4ERR_DELAY:
aa5190d0 7610 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7611 /* fall through */
7612 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7613 return -EAGAIN;
7614 default:
0400a6b0 7615 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7616 }
7617 return 0;
7618}
7619
fce5c838
RL		 7620static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7621{
7622 struct nfs4_reclaim_complete_data *calldata = data;
7623 struct nfs_client *clp = calldata->clp;
7624 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7625
7626 dprintk("--> %s\n", __func__);
14516c3a
TM		 7627 if (!nfs41_sequence_done(task, res))
7628 return;
fce5c838 7629
c6d01c6f 7630 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7631 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7632 rpc_restart_call_prepare(task);
7633 return;
7634 }
fce5c838
RL		 7635 dprintk("<-- %s\n", __func__);
7636}
7637
7638static void nfs4_free_reclaim_complete_data(void *data)
7639{
7640 struct nfs4_reclaim_complete_data *calldata = data;
7641
7642 kfree(calldata);
7643}
7644
7645static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7646 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7647 .rpc_call_done = nfs4_reclaim_complete_done,
7648 .rpc_release = nfs4_free_reclaim_complete_data,
7649};
7650
7651/*
7652 * Issue a global reclaim complete.
7653 */
965e9c23
TM		 7654static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7655 struct rpc_cred *cred)
fce5c838
RL		 7656{
7657 struct nfs4_reclaim_complete_data *calldata;
7658 struct rpc_task *task;
7659 struct rpc_message msg = {
7660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7661 .rpc_cred = cred,
fce5c838
RL		 7662 };
7663 struct rpc_task_setup task_setup_data = {
7664 .rpc_client = clp->cl_rpcclient,
7665 .rpc_message = &msg,
7666 .callback_ops = &nfs4_reclaim_complete_call_ops,
7667 .flags = RPC_TASK_ASYNC,
7668 };
7669 int status = -ENOMEM;
7670
7671 dprintk("--> %s\n", __func__);
8535b2be 7672 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7673 if (calldata == NULL)
7674 goto out;
7675 calldata->clp = clp;
7676 calldata->arg.one_fs = 0;
fce5c838 7677
a9c92d6b 7678 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7679 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7680 msg.rpc_argp = &calldata->arg;
7681 msg.rpc_resp = &calldata->res;
7682 task_setup_data.callback_data = calldata;
7683 task = rpc_run_task(&task_setup_data);
acf82b85 7684 if (IS_ERR(task)) {
fce5c838 7685 status = PTR_ERR(task);
acf82b85
DC		 7686 goto out;
7687 }
c34c32ea
AA		 7688 status = nfs4_wait_for_completion_rpc_task(task);
7689 if (status == 0)
7690 status = task->tk_status;
fce5c838 7691 rpc_put_task(task);
acf82b85 7692 return 0;
fce5c838
RL		 7693out:
7694 dprintk("<-- %s status=%d\n", __func__, status);
7695 return status;
7696}
b1f69b75
AA		 7697
7698static void
7699nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7700{
7701 struct nfs4_layoutget *lgp = calldata;
c31663d4 7702 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7703 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7704
7705 dprintk("--> %s\n", __func__);
c31663d4
FI		 7706 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7707 * right now covering the LAYOUTGET we are about to send.
7708 * However, that is not so catastrophic, and there seems
7709 * to be no way to prevent it completely.
7710 */
6ba7db34 7711 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7712 &lgp->res.seq_res, task))
b1f69b75 7713 return;
cf7d63f1
FI		 7714 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7715 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7716 &lgp->args.range,
cf7d63f1
FI		 7717 lgp->args.ctx->state)) {
7718 rpc_exit(task, NFS4_OK);
cf7d63f1 7719 }
b1f69b75
AA		 7720}
7721
7722static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7723{
7724 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7725 struct inode *inode = lgp->args.inode;
7726 struct nfs_server *server = NFS_SERVER(inode);
7727 struct pnfs_layout_hdr *lo;
7728 struct nfs4_state *state = NULL;
ed7e5423 7729 unsigned long timeo, now, giveup;
b1f69b75 7730
ed7e5423 7731 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7732
6ba7db34 7733 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7734 goto out;
b1f69b75
AA		 7735
7736 switch (task->tk_status) {
7737 case 0:
ee314c2a 7738 goto out;
ed7e5423
BH		 7739 /*
7740 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7741 * (or clients) writing to the same RAID stripe
7742 */
b1f69b75 7743 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7744 /*
7745 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7746 * existing layout before getting a new one).
7747 */
b1f69b75 7748 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7749 timeo = rpc_get_timeout(task->tk_client);
7750 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7751 now = jiffies;
7752 if (time_after(giveup, now)) {
7753 unsigned long delay;
7754
7755 /* Delay for:
7756 * - Not less then NFS4_POLL_RETRY_MIN.
7757 * - One last time a jiffie before we give up
7758 * - exponential backoff (time_now minus start_attempt)
7759 */
7760 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7761 min((giveup - now - 1),
7762 now - lgp->args.timestamp));
7763
7764 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7765 __func__, delay);
7766 rpc_delay(task, delay);
7767 task->tk_status = 0;
7768 rpc_restart_call_prepare(task);
7769 goto out; /* Do not call nfs4_async_handle_error() */
7770 }
ee314c2a
TM		 7771 break;
7772 case -NFS4ERR_EXPIRED:
7773 case -NFS4ERR_BAD_STATEID:
7774 spin_lock(&inode->i_lock);
7775 lo = NFS_I(inode)->layout;
7776 if (!lo || list_empty(&lo->plh_segs)) {
7777 spin_unlock(&inode->i_lock);
7778 /* If the open stateid was bad, then recover it. */
7779 state = lgp->args.ctx->state;
7780 } else {
7781 LIST_HEAD(head);
7782
defb8460
CH		 7783 /*
7784 * Mark the bad layout state as invalid, then retry
7785 * with the current stateid.
7786 */
ee314c2a
TM		 7787 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7788 spin_unlock(&inode->i_lock);
ee314c2a 7789 pnfs_free_lseg_list(&head);
defb8460
CH		 7790
7791 task->tk_status = 0;
7792 rpc_restart_call_prepare(task);
b1f69b75
AA		 7793 }
7794 }
8478eaa1 7795 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7796 rpc_restart_call_prepare(task);
7797out:
b1f69b75
AA		 7798 dprintk("<-- %s\n", __func__);
7799}
7800
8554116e
IK		 7801static size_t max_response_pages(struct nfs_server *server)
7802{
7803 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7804 return nfs_page_array_len(0, max_resp_sz);
7805}
7806
7807static void nfs4_free_pages(struct page **pages, size_t size)
7808{
7809 int i;
7810
7811 if (!pages)
7812 return;
7813
7814 for (i = 0; i < size; i++) {
7815 if (!pages[i])
7816 break;
7817 __free_page(pages[i]);
7818 }
7819 kfree(pages);
7820}
7821
7822static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7823{
7824 struct page **pages;
7825 int i;
7826
7827 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7828 if (!pages) {
7829 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7830 return NULL;
7831 }
7832
7833 for (i = 0; i < size; i++) {
7834 pages[i] = alloc_page(gfp_flags);
7835 if (!pages[i]) {
7836 dprintk("%s: failed to allocate page\n", __func__);
7837 nfs4_free_pages(pages, size);
7838 return NULL;
7839 }
7840 }
7841
7842 return pages;
7843}
7844
b1f69b75
AA		 7845static void nfs4_layoutget_release(void *calldata)
7846{
7847 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7848 struct inode *inode = lgp->args.inode;
7849 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7850 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7851
7852 dprintk("--> %s\n", __func__);
8554116e 7853 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7854 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7855 put_nfs_open_context(lgp->args.ctx);
7856 kfree(calldata);
7857 dprintk("<-- %s\n", __func__);
7858}
7859
7860static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7861 .rpc_call_prepare = nfs4_layoutget_prepare,
7862 .rpc_call_done = nfs4_layoutget_done,
7863 .rpc_release = nfs4_layoutget_release,
7864};
7865
a0b0a6e3
TM		 7866struct pnfs_layout_segment *
7867nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7868{
a47970ff
WAA		 7869 struct inode *inode = lgp->args.inode;
7870 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7871 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7872 struct rpc_task *task;
7873 struct rpc_message msg = {
7874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7875 .rpc_argp = &lgp->args,
7876 .rpc_resp = &lgp->res,
6ab59344 7877 .rpc_cred = lgp->cred,
b1f69b75
AA		 7878 };
7879 struct rpc_task_setup task_setup_data = {
7880 .rpc_client = server->client,
7881 .rpc_message = &msg,
7882 .callback_ops = &nfs4_layoutget_call_ops,
7883 .callback_data = lgp,
7884 .flags = RPC_TASK_ASYNC,
7885 };
a0b0a6e3 7886 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7887 int status = 0;
7888
7889 dprintk("--> %s\n", __func__);
7890
4bd5a980
PT		 7891 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7892 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7893
8554116e
IK		 7894 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7895 if (!lgp->args.layout.pages) {
7896 nfs4_layoutget_release(lgp);
a0b0a6e3 7897 return ERR_PTR(-ENOMEM);
8554116e
IK		 7898 }
7899 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7900 lgp->args.timestamp = jiffies;
8554116e 7901
35124a09 7902 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7903 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7904 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7905
b1f69b75
AA		 7906 task = rpc_run_task(&task_setup_data);
7907 if (IS_ERR(task))
a0b0a6e3 7908 return ERR_CAST(task);
b1f69b75 7909 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7910 if (status == 0)
7911 status = task->tk_status;
1037e6ea
TM		 7912 trace_nfs4_layoutget(lgp->args.ctx,
7913 &lgp->args.range,
7914 &lgp->res.range,
7915 status);
085b7a45
WAA		 7916 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7917 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7918 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7919 rpc_put_task(task);
7920 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7921 if (status)
7922 return ERR_PTR(status);
7923 return lseg;
b1f69b75
AA		 7924}
7925
cbe82603
BH		 7926static void
7927nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7928{
7929 struct nfs4_layoutreturn *lrp = calldata;
7930
7931 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7932 nfs41_setup_sequence(lrp->clp->cl_session,
7933 &lrp->args.seq_args,
7934 &lrp->res.seq_res,
7935 task);
cbe82603
BH		 7936}
7937
7938static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7939{
7940 struct nfs4_layoutreturn *lrp = calldata;
7941 struct nfs_server *server;
7942
7943 dprintk("--> %s\n", __func__);
7944
6ba7db34 7945 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7946 return;
7947
7948 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7949 switch (task->tk_status) {
7950 default:
7951 task->tk_status = 0;
7952 case 0:
7953 break;
7954 case -NFS4ERR_DELAY:
8478eaa1 7955 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7956 break;
d00c5d43 7957 rpc_restart_call_prepare(task);
cbe82603
BH		 7958 return;
7959 }
cbe82603
BH		 7960 dprintk("<-- %s\n", __func__);
7961}
7962
7963static void nfs4_layoutreturn_release(void *calldata)
7964{
7965 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7966 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7967
7968 dprintk("--> %s\n", __func__);
849b286f
TM		 7969 spin_lock(&lo->plh_inode->i_lock);
7970 if (lrp->res.lrs_present)
7971 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7972 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7973 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7974 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7975 lo->plh_block_lgets--;
7976 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7977 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7978 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7979 kfree(calldata);
7980 dprintk("<-- %s\n", __func__);
7981}
7982
7983static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7984 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7985 .rpc_call_done = nfs4_layoutreturn_done,
7986 .rpc_release = nfs4_layoutreturn_release,
7987};
7988
6c16605d 7989int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7990{
7991 struct rpc_task *task;
7992 struct rpc_message msg = {
7993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7994 .rpc_argp = &lrp->args,
7995 .rpc_resp = &lrp->res,
9556000d 7996 .rpc_cred = lrp->cred,
cbe82603
BH		 7997 };
7998 struct rpc_task_setup task_setup_data = {
1771c577 7999 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8000 .rpc_message = &msg,
8001 .callback_ops = &nfs4_layoutreturn_call_ops,
8002 .callback_data = lrp,
8003 };
6c16605d 8004 int status = 0;
cbe82603
BH		 8005
8006 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8007 if (!sync) {
8008 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8009 if (!lrp->inode) {
8010 nfs4_layoutreturn_release(lrp);
8011 return -EAGAIN;
8012 }
8013 task_setup_data.flags |= RPC_TASK_ASYNC;
8014 }
a9c92d6b 8015 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8016 task = rpc_run_task(&task_setup_data);
8017 if (IS_ERR(task))
8018 return PTR_ERR(task);
5a0ec8ac
TM		 8019 if (sync)
8020 status = task->tk_status;
1037e6ea 8021 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8022 dprintk("<-- %s status=%d\n", __func__, status);
8023 rpc_put_task(task);
8024 return status;
8025}
8026
b1f69b75 8027static int
cd5875fe
TM		 8028_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8029 struct pnfs_device *pdev,
8030 struct rpc_cred *cred)
b1f69b75
AA		 8031{
8032 struct nfs4_getdeviceinfo_args args = {
8033 .pdev = pdev,
4e590803
TM		 8034 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8035 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8036 };
8037 struct nfs4_getdeviceinfo_res res = {
8038 .pdev = pdev,
8039 };
8040 struct rpc_message msg = {
8041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8042 .rpc_argp = &args,
8043 .rpc_resp = &res,
cd5875fe 8044 .rpc_cred = cred,
b1f69b75
AA		 8045 };
8046 int status;
8047
8048 dprintk("--> %s\n", __func__);
7c513058 8049 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8050 if (res.notification & ~args.notify_types)
8051 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8052 if (res.notification != args.notify_types)
8053 pdev->nocache = 1;
4e590803 8054
b1f69b75
AA		 8055 dprintk("<-- %s status=%d\n", __func__, status);
8056
8057 return status;
8058}
8059
cd5875fe
TM		 8060int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8061 struct pnfs_device *pdev,
8062 struct rpc_cred *cred)
b1f69b75
AA		 8063{
8064 struct nfs4_exception exception = { };
8065 int err;
8066
8067 do {
8068 err = nfs4_handle_exception(server,
cd5875fe 8069 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8070 &exception);
8071 } while (exception.retry);
8072 return err;
8073}
8074EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8075
863a3c6c
AA		 8076static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8077{
8078 struct nfs4_layoutcommit_data *data = calldata;
8079 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8080 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8081
d9afbd1b
TM		 8082 nfs41_setup_sequence(session,
8083 &data->args.seq_args,
8084 &data->res.seq_res,
8085 task);
863a3c6c
AA		 8086}
8087
8088static void
8089nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8090{
8091 struct nfs4_layoutcommit_data *data = calldata;
8092 struct nfs_server *server = NFS_SERVER(data->args.inode);
8093
6ba7db34 8094 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8095 return;
8096
8097 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8098 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8099 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8100 case -NFS4ERR_BADLAYOUT: /* no layout */
8101 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8102 task->tk_status = 0;
e59d27e0 8103 case 0:
e59d27e0
TM		 8104 break;
8105 default:
8478eaa1 8106 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8107 rpc_restart_call_prepare(task);
8108 return;
8109 }
8110 }
863a3c6c
AA		 8111}
8112
8113static void nfs4_layoutcommit_release(void *calldata)
8114{
8115 struct nfs4_layoutcommit_data *data = calldata;
8116
db29c089 8117 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8118 nfs_post_op_update_inode_force_wcc(data->args.inode,
8119 data->res.fattr);
863a3c6c 8120 put_rpccred(data->cred);
472e2594 8121 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8122 kfree(data);
8123}
8124
8125static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8126 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8127 .rpc_call_done = nfs4_layoutcommit_done,
8128 .rpc_release = nfs4_layoutcommit_release,
8129};
8130
8131int
ef311537 8132nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8133{
8134 struct rpc_message msg = {
8135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8136 .rpc_argp = &data->args,
8137 .rpc_resp = &data->res,
8138 .rpc_cred = data->cred,
8139 };
8140 struct rpc_task_setup task_setup_data = {
8141 .task = &data->task,
8142 .rpc_client = NFS_CLIENT(data->args.inode),
8143 .rpc_message = &msg,
8144 .callback_ops = &nfs4_layoutcommit_ops,
8145 .callback_data = data,
863a3c6c
AA		 8146 };
8147 struct rpc_task *task;
8148 int status = 0;
8149
b4839ebe
KM		 8150 dprintk("NFS: initiating layoutcommit call. sync %d "
8151 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8152 data->args.lastbytewritten,
8153 data->args.inode->i_ino);
8154
472e2594
TM		 8155 if (!sync) {
8156 data->inode = nfs_igrab_and_active(data->args.inode);
8157 if (data->inode == NULL) {
8158 nfs4_layoutcommit_release(data);
8159 return -EAGAIN;
8160 }
8161 task_setup_data.flags = RPC_TASK_ASYNC;
8162 }
a9c92d6b 8163 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8164 task = rpc_run_task(&task_setup_data);
8165 if (IS_ERR(task))
8166 return PTR_ERR(task);
472e2594
TM		 8167 if (sync)
8168 status = task->tk_status;
1037e6ea 8169 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8170 dprintk("%s: status %d\n", __func__, status);
8171 rpc_put_task(task);
8172 return status;
8173}
fca78d6d 8174
97431204
AA		 8175/**
8176 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8177 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8178 */
fca78d6d
BS		 8179static int
8180_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8181 struct nfs_fsinfo *info,
8182 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8183{
8184 struct nfs41_secinfo_no_name_args args = {
8185 .style = SECINFO_STYLE_CURRENT_FH,
8186 };
8187 struct nfs4_secinfo_res res = {
8188 .flavors = flavors,
8189 };
8190 struct rpc_message msg = {
8191 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8192 .rpc_argp = &args,
8193 .rpc_resp = &res,
8194 };
b1b3e136 8195 struct rpc_clnt *clnt = server->client;
7cb852df 8196 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8197 int status;
8198
8199 if (use_integrity) {
8200 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8201 cred = nfs4_get_clid_cred(server->nfs_client);
8202 msg.rpc_cred = cred;
b1b3e136
WAA		 8203 }
8204
8205 dprintk("--> %s\n", __func__);
8206 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8207 &res.seq_res, 0);
8208 dprintk("<-- %s status=%d\n", __func__, status);
8209
7cb852df
WAA		 8210 if (cred)
8211 put_rpccred(cred);
b1b3e136
WAA		 8212
8213 return status;
fca78d6d
BS		 8214}
8215
8216static int
8217nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8218 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8219{
8220 struct nfs4_exception exception = { };
8221 int err;
8222 do {
b1b3e136
WAA		 8223 /* first try using integrity protection */
8224 err = -NFS4ERR_WRONGSEC;
8225
8226 /* try to use integrity protection with machine cred */
8227 if (_nfs4_is_integrity_protected(server->nfs_client))
8228 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8229 flavors, true);
8230
8231 /*
8232 * if unable to use integrity protection, or SECINFO with
8233 * integrity protection returns NFS4ERR_WRONGSEC (which is
8234 * disallowed by spec, but exists in deployed servers) use
8235 * the current filesystem's rpc_client and the user cred.
8236 */
8237 if (err == -NFS4ERR_WRONGSEC)
8238 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8239 flavors, false);
8240
fca78d6d
BS		 8241 switch (err) {
8242 case 0:
8243 case -NFS4ERR_WRONGSEC:
78b19bae 8244 case -ENOTSUPP:
05e9cfb4 8245 goto out;
fca78d6d
BS		 8246 default:
8247 err = nfs4_handle_exception(server, err, &exception);
8248 }
8249 } while (exception.retry);
05e9cfb4 8250out:
fca78d6d
BS		 8251 return err;
8252}
8253
8254static int
8255nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8256 struct nfs_fsinfo *info)
8257{
8258 int err;
8259 struct page *page;
367156d9 8260 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8261 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8262 struct nfs4_secinfo4 *secinfo;
8263 int i;
fca78d6d
BS		 8264
8265 page = alloc_page(GFP_KERNEL);
8266 if (!page) {
8267 err = -ENOMEM;
8268 goto out;
8269 }
8270
8271 flavors = page_address(page);
8272 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8273
8274 /*
8275 * Fall back on "guess and check" method if
8276 * the server doesn't support SECINFO_NO_NAME
8277 */
78b19bae 8278 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8279 err = nfs4_find_root_sec(server, fhandle, info);
8280 goto out_freepage;
8281 }
8282 if (err)
8283 goto out_freepage;
8284
58a8cf12
WAA		 8285 for (i = 0; i < flavors->num_flavors; i++) {
8286 secinfo = &flavors->flavors[i];
8287
8288 switch (secinfo->flavor) {
8289 case RPC_AUTH_NULL:
8290 case RPC_AUTH_UNIX:
8291 case RPC_AUTH_GSS:
8292 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8293 &secinfo->flavor_info);
8294 break;
8295 default:
8296 flavor = RPC_AUTH_MAXFLAVOR;
8297 break;
8298 }
8299
4d4b69dd
WAA		 8300 if (!nfs_auth_info_match(&server->auth_info, flavor))
8301 flavor = RPC_AUTH_MAXFLAVOR;
8302
58a8cf12
WAA		 8303 if (flavor != RPC_AUTH_MAXFLAVOR) {
8304 err = nfs4_lookup_root_sec(server, fhandle,
8305 info, flavor);
8306 if (!err)
8307 break;
8308 }
8309 }
8310
8311 if (flavor == RPC_AUTH_MAXFLAVOR)
8312 err = -EPERM;
fca78d6d
BS		 8313
8314out_freepage:
8315 put_page(page);
8316 if (err == -EACCES)
8317 return -EPERM;
8318out:
8319 return err;
8320}
1cab0652 8321
ab7cb0df
TM		 8322static int _nfs41_test_stateid(struct nfs_server *server,
8323 nfs4_stateid *stateid,
8324 struct rpc_cred *cred)
7d974794
BS		 8325{
8326 int status;
8327 struct nfs41_test_stateid_args args = {
1cab0652 8328 .stateid = stateid,
7d974794
BS		 8329 };
8330 struct nfs41_test_stateid_res res;
8331 struct rpc_message msg = {
8332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8333 .rpc_argp = &args,
8334 .rpc_resp = &res,
ab7cb0df 8335 .rpc_cred = cred,
7d974794 8336 };
3787d506
WAA		 8337 struct rpc_clnt *rpc_client = server->client;
8338
8339 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8340 &rpc_client, &msg);
1cab0652 8341
38527b15 8342 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8343 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8344 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8345 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8346 &args.seq_args, &res.seq_res);
38527b15
CL		 8347 if (status != NFS_OK) {
8348 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8349 return status;
38527b15
CL		 8350 }
8351 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8352 return -res.status;
7d974794
BS		 8353}
8354
38527b15
CL		 8355/**
8356 * nfs41_test_stateid - perform a TEST_STATEID operation
8357 *
8358 * @server: server / transport on which to perform the operation
8359 * @stateid: state ID to test
ab7cb0df 8360 * @cred: credential
38527b15
CL		 8361 *
8362 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8363 * Otherwise a negative NFS4ERR value is returned if the operation
8364 * failed or the state ID is not currently valid.
8365 */
ab7cb0df
TM		 8366static int nfs41_test_stateid(struct nfs_server *server,
8367 nfs4_stateid *stateid,
8368 struct rpc_cred *cred)
7d974794
BS		 8369{
8370 struct nfs4_exception exception = { };
8371 int err;
8372 do {
ab7cb0df 8373 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8374 if (err != -NFS4ERR_DELAY)
8375 break;
8376 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8377 } while (exception.retry);
8378 return err;
8379}
9aeda35f 8380
7c1d5fae
TM		 8381struct nfs_free_stateid_data {
8382 struct nfs_server *server;
8383 struct nfs41_free_stateid_args args;
9aeda35f 8384 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8385};
8386
8387static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8388{
8389 struct nfs_free_stateid_data *data = calldata;
8390 nfs41_setup_sequence(nfs4_get_session(data->server),
8391 &data->args.seq_args,
8392 &data->res.seq_res,
8393 task);
8394}
8395
8396static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8397{
8398 struct nfs_free_stateid_data *data = calldata;
8399
8400 nfs41_sequence_done(task, &data->res.seq_res);
8401
8402 switch (task->tk_status) {
8403 case -NFS4ERR_DELAY:
8478eaa1 8404 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8405 rpc_restart_call_prepare(task);
8406 }
8407}
8408
8409static void nfs41_free_stateid_release(void *calldata)
8410{
8411 kfree(calldata);
8412}
8413
17f26b12 8414static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8415 .rpc_call_prepare = nfs41_free_stateid_prepare,
8416 .rpc_call_done = nfs41_free_stateid_done,
8417 .rpc_release = nfs41_free_stateid_release,
8418};
8419
8420static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8421 nfs4_stateid *stateid,
ab7cb0df 8422 struct rpc_cred *cred,
7c1d5fae
TM		 8423 bool privileged)
8424{
9aeda35f
BS		 8425 struct rpc_message msg = {
8426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8427 .rpc_cred = cred,
9aeda35f 8428 };
7c1d5fae
TM		 8429 struct rpc_task_setup task_setup = {
8430 .rpc_client = server->client,
8431 .rpc_message = &msg,
8432 .callback_ops = &nfs41_free_stateid_ops,
8433 .flags = RPC_TASK_ASYNC,
8434 };
8435 struct nfs_free_stateid_data *data;
9aeda35f 8436
3787d506
WAA		 8437 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8438 &task_setup.rpc_client, &msg);
8439
38527b15 8440 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8441 data = kmalloc(sizeof(*data), GFP_NOFS);
8442 if (!data)
8443 return ERR_PTR(-ENOMEM);
8444 data->server = server;
8445 nfs4_stateid_copy(&data->args.stateid, stateid);
8446
8447 task_setup.callback_data = data;
8448
8449 msg.rpc_argp = &data->args;
8450 msg.rpc_resp = &data->res;
a9c92d6b 8451 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8452 if (privileged)
8453 nfs4_set_sequence_privileged(&data->args.seq_args);
8454
8455 return rpc_run_task(&task_setup);
9aeda35f
BS		 8456}
8457
38527b15
CL		 8458/**
8459 * nfs41_free_stateid - perform a FREE_STATEID operation
8460 *
8461 * @server: server / transport on which to perform the operation
8462 * @stateid: state ID to release
ab7cb0df 8463 * @cred: credential
38527b15
CL		 8464 *
8465 * Returns NFS_OK if the server freed "stateid". Otherwise a
8466 * negative NFS4ERR value is returned.
8467 */
ab7cb0df
TM		 8468static int nfs41_free_stateid(struct nfs_server *server,
8469 nfs4_stateid *stateid,
8470 struct rpc_cred *cred)
9aeda35f 8471{
7c1d5fae
TM		 8472 struct rpc_task *task;
8473 int ret;
8474
ab7cb0df 8475 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8476 if (IS_ERR(task))
8477 return PTR_ERR(task);
8478 ret = rpc_wait_for_completion_task(task);
8479 if (!ret)
8480 ret = task->tk_status;
8481 rpc_put_task(task);
8482 return ret;
9aeda35f 8483}
36281caa 8484
f1cdae87
JL		 8485static void
8486nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8487{
8488 struct rpc_task *task;
ab7cb0df 8489 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8490
ab7cb0df 8491 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8492 nfs4_free_lock_state(server, lsp);
8493 if (IS_ERR(task))
f1cdae87 8494 return;
c8b2d0bf 8495 rpc_put_task(task);
c8b2d0bf
TM		 8496}
8497
36281caa
TM		 8498static bool nfs41_match_stateid(const nfs4_stateid *s1,
8499 const nfs4_stateid *s2)
8500{
2d2f24ad 8501 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8502 return false;
8503
2d2f24ad 8504 if (s1->seqid == s2->seqid)
36281caa 8505 return true;
2d2f24ad 8506 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8507 return true;
8508
8509 return false;
8510}
8511
557134a3
AA		 8512#endif /* CONFIG_NFS_V4_1 */
8513
36281caa
TM		 8514static bool nfs4_match_stateid(const nfs4_stateid *s1,
8515 const nfs4_stateid *s2)
8516{
f597c537 8517 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8518}
8519
8520
17280175 8521static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8522 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8523 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8524 .recover_open = nfs4_open_reclaim,
8525 .recover_lock = nfs4_lock_reclaim,
591d71cb 8526 .establish_clid = nfs4_init_clientid,
05f4c350 8527 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8528};
8529
591d71cb 8530#if defined(CONFIG_NFS_V4_1)
17280175 8531static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8532 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8533 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8534 .recover_open = nfs4_open_reclaim,
8535 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8536 .establish_clid = nfs41_init_clientid,
fce5c838 8537 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8538 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8539};
8540#endif /* CONFIG_NFS_V4_1 */
8541
17280175 8542static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8543 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8544 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8545 .recover_open = nfs40_open_expired,
591d71cb
AA		 8546 .recover_lock = nfs4_lock_expired,
8547 .establish_clid = nfs4_init_clientid,
8548};
8549
8550#if defined(CONFIG_NFS_V4_1)
17280175 8551static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8552 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8553 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8554 .recover_open = nfs41_open_expired,
8555 .recover_lock = nfs41_lock_expired,
4d643d1d 8556 .establish_clid = nfs41_init_clientid,
1da177e4 8557};
591d71cb 8558#endif /* CONFIG_NFS_V4_1 */
1da177e4 8559
17280175 8560static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8561 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8562 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8563 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8564};
8565
8566#if defined(CONFIG_NFS_V4_1)
17280175 8567static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8568 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8569 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8570 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8571};
8572#endif
8573
ec011fe8 8574static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8575 .get_locations = _nfs40_proc_get_locations,
44c99933 8576 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8577};
8578
8579#if defined(CONFIG_NFS_V4_1)
8580static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8581 .get_locations = _nfs41_proc_get_locations,
44c99933 8582 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8583};
8584#endif /* CONFIG_NFS_V4_1 */
8585
97dc1359
TM		 8586static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8587 .minor_version = 0,
39c6daae
TM		 8588 .init_caps = NFS_CAP_READDIRPLUS
8589 | NFS_CAP_ATOMIC_OPEN
8590 | NFS_CAP_CHANGE_ATTR
8591 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8592 .init_client = nfs40_init_client,
8593 .shutdown_client = nfs40_shutdown_client,
36281caa 8594 .match_stateid = nfs4_match_stateid,
fca78d6d 8595 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8596 .free_lock_state = nfs4_release_lockowner,
63f5f796 8597 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8598 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8599 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8600 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8601 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8602 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8603};
8604
8605#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8606static struct nfs_seqid *
8607nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8608{
8609 return NULL;
8610}
8611
97dc1359
TM		 8612static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8613 .minor_version = 1,
39c6daae
TM		 8614 .init_caps = NFS_CAP_READDIRPLUS
8615 | NFS_CAP_ATOMIC_OPEN
8616 | NFS_CAP_CHANGE_ATTR
3b66486c 8617 | NFS_CAP_POSIX_LOCK
49f9a0fa 8618 | NFS_CAP_STATEID_NFSV41
e983120e 8619 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8620 .init_client = nfs41_init_client,
8621 .shutdown_client = nfs41_shutdown_client,
36281caa 8622 .match_stateid = nfs41_match_stateid,
fca78d6d 8623 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8624 .free_lock_state = nfs41_free_lock_state,
63f5f796 8625 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8626 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8627 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8628 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8629 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8630 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8631};
8632#endif
8633
42c2c424
SD		 8634#if defined(CONFIG_NFS_V4_2)
8635static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8636 .minor_version = 2,
7017310a
BS		 8637 .init_caps = NFS_CAP_READDIRPLUS
8638 | NFS_CAP_ATOMIC_OPEN
8639 | NFS_CAP_CHANGE_ATTR
8640 | NFS_CAP_POSIX_LOCK
8641 | NFS_CAP_STATEID_NFSV41
e983120e 8642 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8643 | NFS_CAP_ALLOCATE
624bd5b7 8644 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8645 | NFS_CAP_SEEK
8646 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8647 .init_client = nfs41_init_client,
8648 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8649 .match_stateid = nfs41_match_stateid,
8650 .find_root_sec = nfs41_find_root_sec,
7017310a 8651 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8652 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8653 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8654 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8655 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8656 .state_renewal_ops = &nfs41_state_renewal_ops,
8657};
8658#endif
8659
97dc1359
TM		 8660const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8661 [0] = &nfs_v4_0_minor_ops,
8662#if defined(CONFIG_NFS_V4_1)
8663 [1] = &nfs_v4_1_minor_ops,
8664#endif
42c2c424
SD		 8665#if defined(CONFIG_NFS_V4_2)
8666 [2] = &nfs_v4_2_minor_ops,
8667#endif
97dc1359
TM		 8668};
8669
17f26b12 8670static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8671 .create = nfs_create,
8672 .lookup = nfs_lookup,
8673 .atomic_open = nfs_atomic_open,
8674 .link = nfs_link,
8675 .unlink = nfs_unlink,
8676 .symlink = nfs_symlink,
8677 .mkdir = nfs_mkdir,
8678 .rmdir = nfs_rmdir,
8679 .mknod = nfs_mknod,
8680 .rename = nfs_rename,
8681 .permission = nfs_permission,
8682 .getattr = nfs_getattr,
8683 .setattr = nfs_setattr,
8684 .getxattr = generic_getxattr,
8685 .setxattr = generic_setxattr,
8686 .listxattr = generic_listxattr,
8687 .removexattr = generic_removexattr,
8688};
8689
92e1d5be 8690static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8691 .permission = nfs_permission,
8692 .getattr = nfs_getattr,
8693 .setattr = nfs_setattr,
64c2ce8b
AK		 8694 .getxattr = generic_getxattr,
8695 .setxattr = generic_setxattr,
8696 .listxattr = generic_listxattr,
8697 .removexattr = generic_removexattr,
6b3b5496
BF		 8698};
8699
509de811 8700const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8701 .version = 4, /* protocol version */
8702 .dentry_ops = &nfs4_dentry_operations,
8703 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8704 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8705 .file_ops = &nfs4_file_operations,
1da177e4 8706 .getroot = nfs4_proc_get_root,
281cad46 8707 .submount = nfs4_submount,
ff9099f2 8708 .try_mount = nfs4_try_mount,
1da177e4
LT		 8709 .getattr = nfs4_proc_getattr,
8710 .setattr = nfs4_proc_setattr,
8711 .lookup = nfs4_proc_lookup,
8712 .access = nfs4_proc_access,
8713 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8714 .create = nfs4_proc_create,
8715 .remove = nfs4_proc_remove,
8716 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8717 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8718 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8719 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8720 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8721 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8722 .link = nfs4_proc_link,
8723 .symlink = nfs4_proc_symlink,
8724 .mkdir = nfs4_proc_mkdir,
8725 .rmdir = nfs4_proc_remove,
8726 .readdir = nfs4_proc_readdir,
8727 .mknod = nfs4_proc_mknod,
8728 .statfs = nfs4_proc_statfs,
8729 .fsinfo = nfs4_proc_fsinfo,
8730 .pathconf = nfs4_proc_pathconf,
e9326dca 8731 .set_capabilities = nfs4_server_capabilities,
1da177e4 8732 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8733 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8734 .read_setup = nfs4_proc_read_setup,
ec06c096 8735 .read_done = nfs4_read_done,
1da177e4 8736 .write_setup = nfs4_proc_write_setup,
788e7a89 8737 .write_done = nfs4_write_done,
1da177e4 8738 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8739 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8740 .commit_done = nfs4_commit_done,
1da177e4 8741 .lock = nfs4_proc_lock,
e50a1c2e 8742 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8743 .close_context = nfs4_close_context,
2b484297 8744 .open_context = nfs4_atomic_open,
011e2a7f 8745 .have_delegation = nfs4_have_delegation,
57ec14c5 8746 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8747 .alloc_client = nfs4_alloc_client,
45a52a02 8748 .init_client = nfs4_init_client,
cdb7eced 8749 .free_client = nfs4_free_client,
1179acc6
BS		 8750 .create_server = nfs4_create_server,
8751 .clone_server = nfs_clone_server,
1da177e4
LT		 8752};
8753
64c2ce8b
AK		 8754static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8755 .prefix = XATTR_NAME_NFSV4_ACL,
8756 .list = nfs4_xattr_list_nfs4_acl,
8757 .get = nfs4_xattr_get_nfs4_acl,
8758 .set = nfs4_xattr_set_nfs4_acl,
8759};
8760
8761const struct xattr_handler *nfs4_xattr_handlers[] = {
8762 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8763#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8764 &nfs4_xattr_nfs4_label_handler,
8765#endif
64c2ce8b
AK		 8766 NULL
8767};
8768
1da177e4
LT		 8769/*
8770 * Local variables:
8771 * c-basic-offset: 8
8772 * End:
8773 */
Linux 6.x block layer and io_uring tree(s)