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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
[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 588 if (send_new_highest_used_slotid)
3f10a6af 589 nfs41_notify_server(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;
a49c2691 915 struct nfs4_label *a_label;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
6ae37339
TM		 943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
49f9a0fa
TM		 968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
2ced46c2
TM		 985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
1775fd3e 989 p->o_res.f_label = p->f_label;
c1d51931
TM		 990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 992 p->o_res.server = p->o_arg.server;
5f657530 993 p->o_res.access_request = p->o_arg.access;
2ced46c2 994 nfs_fattr_init(&p->f_attr);
6926afd1 995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 996}
997
82a2c1b7 998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1000 const struct iattr *attrs,
1775fd3e 1001 struct nfs4_label *label,
4a1c0893 1002 enum open_claim_type4 claim,
8535b2be 1003 gfp_t gfp_mask)
e56e0b78 1004{
82a2c1b7 1005 struct dentry *parent = dget_parent(dentry);
2b0143b5 1006 struct inode *dir = d_inode(parent);
e56e0b78 1007 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1009 struct nfs4_opendata *p;
1010
8535b2be 1011 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1012 if (p == NULL)
1013 goto err;
14c43f76
DQ		 1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
a49c2691
KM		 1019 p->a_label = nfs4_label_alloc(server, gfp_mask);
1020 if (IS_ERR(p->a_label))
1021 goto err_free_f;
1022
63f5f796
TM		 1023 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1024 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1025 if (IS_ERR(p->o_arg.seqid))
14c43f76 1026 goto err_free_label;
82a2c1b7
AV		 1027 nfs_sb_active(dentry->d_sb);
1028 p->dentry = dget(dentry);
e56e0b78
TM		 1029 p->dir = parent;
1030 p->owner = sp;
1031 atomic_inc(&sp->so_count);
dc0b027d
TM		 1032 p->o_arg.open_flags = flags;
1033 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1034 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 fmode, flags);
ae2bb032
WAA		 1036 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1037 * will return permission denied for all bits until close */
1038 if (!(flags & O_EXCL)) {
1039 /* ask server to check for all possible rights as results
1040 * are cached */
1041 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1042 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1043 }
7539bbab 1044 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1045 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1046 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1047 p->o_arg.name = &dentry->d_name;
e56e0b78 1048 p->o_arg.server = server;
aa9c2669 1049 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1050 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1051 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1052 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1053 switch (p->o_arg.claim) {
4a1c0893
TM		 1054 case NFS4_OPEN_CLAIM_NULL:
1055 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1056 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1057 p->o_arg.fh = NFS_FH(dir);
1058 break;
1059 case NFS4_OPEN_CLAIM_PREVIOUS:
1060 case NFS4_OPEN_CLAIM_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1062 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1063 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1064 }
536e43d1 1065 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1066 __u32 verf[2];
d77d76ff 1067
e56e0b78
TM		 1068 p->o_arg.u.attrs = &p->attrs;
1069 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1070
1071 verf[0] = jiffies;
1072 verf[1] = current->pid;
1073 memcpy(p->o_arg.u.verifier.data, verf,
1074 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1075 }
cdd4e68b
TM		 1076 p->c_arg.fh = &p->o_res.fh;
1077 p->c_arg.stateid = &p->o_res.stateid;
1078 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1079 nfs4_init_opendata_res(p);
c6d00e63 1080 kref_init(&p->kref);
e56e0b78 1081 return p;
14c43f76
DQ		 1082
1083err_free_label:
a49c2691
KM		 1084 nfs4_label_free(p->a_label);
1085err_free_f:
14c43f76
DQ		 1086 nfs4_label_free(p->f_label);
1087err_free_p:
e56e0b78
TM		 1088 kfree(p);
1089err:
1090 dput(parent);
1091 return NULL;
1092}
1093
c6d00e63 1094static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1095{
c6d00e63
TM		 1096 struct nfs4_opendata *p = container_of(kref,
1097 struct nfs4_opendata, kref);
82a2c1b7 1098 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1099
1100 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1101 if (p->state != NULL)
1102 nfs4_put_open_state(p->state);
c6d00e63 1103 nfs4_put_state_owner(p->owner);
14c43f76 1104
a49c2691 1105 nfs4_label_free(p->a_label);
14c43f76
DQ		 1106 nfs4_label_free(p->f_label);
1107
c6d00e63 1108 dput(p->dir);
82a2c1b7
AV		 1109 dput(p->dentry);
1110 nfs_sb_deactive(sb);
6926afd1 1111 nfs_fattr_free_names(&p->f_attr);
e911b815 1112 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1113 kfree(p);
1114}
1115
1116static void nfs4_opendata_put(struct nfs4_opendata *p)
1117{
1118 if (p != NULL)
1119 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1120}
1121
06f814a3
TM		 1122static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1123{
06f814a3
TM		 1124 int ret;
1125
06f814a3 1126 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1127 return ret;
1128}
1129
24311f88
TM		 1130static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1131 fmode_t fmode)
1132{
1133 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1134 case FMODE_READ|FMODE_WRITE:
1135 return state->n_rdwr != 0;
1136 case FMODE_WRITE:
1137 return state->n_wronly != 0;
1138 case FMODE_READ:
1139 return state->n_rdonly != 0;
1140 }
1141 WARN_ON_ONCE(1);
1142 return false;
1143}
1144
dc0b027d 1145static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1146{
1147 int ret = 0;
dc0b027d 1148
536e43d1 1149 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1150 goto out;
1151 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1152 case FMODE_READ:
88069f77
TM		 1153 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1154 && state->n_rdonly != 0;
6ee41268
TM		 1155 break;
1156 case FMODE_WRITE:
88069f77
TM		 1157 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1158 && state->n_wronly != 0;
6ee41268
TM		 1159 break;
1160 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1161 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1162 && state->n_rdwr != 0;
6ee41268 1163 }
dc0b027d 1164out:
6ee41268
TM		 1165 return ret;
1166}
1167
2a606188
TM		 1168static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1169 enum open_claim_type4 claim)
aac00a8d 1170{
652f89f6
TM		 1171 if (delegation == NULL)
1172 return 0;
dc0b027d 1173 if ((delegation->type & fmode) != fmode)
aac00a8d 1174 return 0;
d25be546
TM		 1175 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1176 return 0;
2a606188
TM		 1177 switch (claim) {
1178 case NFS4_OPEN_CLAIM_NULL:
1179 case NFS4_OPEN_CLAIM_FH:
1180 break;
1181 case NFS4_OPEN_CLAIM_PREVIOUS:
1182 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1183 break;
1184 default:
1185 return 0;
1186 }
b7391f44 1187 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1188 return 1;
1189}
1190
dc0b027d 1191static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1192{
dc0b027d 1193 switch (fmode) {
e7616923
TM		 1194 case FMODE_WRITE:
1195 state->n_wronly++;
1196 break;
1197 case FMODE_READ:
1198 state->n_rdonly++;
1199 break;
1200 case FMODE_READ|FMODE_WRITE:
1201 state->n_rdwr++;
1202 }
dc0b027d 1203 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1204}
1205
4f14c194
TM		 1206static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1207{
1208 struct nfs_client *clp = state->owner->so_server->nfs_client;
1209 bool need_recover = false;
1210
1211 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1212 need_recover = true;
1213 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1214 need_recover = true;
1215 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1216 need_recover = true;
1217 if (need_recover)
1218 nfs4_state_mark_reclaim_nograce(clp, state);
1219}
1220
e999e80e
TM		 1221static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1222 nfs4_stateid *stateid)
1223{
1224 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1225 return true;
4f14c194
TM		 1226 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1227 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1228 return true;
4f14c194 1229 }
e999e80e
TM		 1230 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1231 return true;
1232 return false;
1233}
1234
f95549cf
TM		 1235static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1236{
3c38cbe2
TM		 1237 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1238 return;
f95549cf
TM		 1239 if (state->n_wronly)
1240 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1241 if (state->n_rdonly)
1242 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1243 if (state->n_rdwr)
1244 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1245 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1246}
1247
226056c5 1248static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1249 nfs4_stateid *arg_stateid,
226056c5 1250 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1251{
226056c5
TM		 1252 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1253 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1254 case FMODE_WRITE:
1255 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1256 break;
1257 case FMODE_READ:
1258 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1259 break;
1260 case 0:
1261 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1262 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1263 clear_bit(NFS_OPEN_STATE, &state->flags);
1264 }
1265 if (stateid == NULL)
1266 return;
f95549cf 1267 /* Handle races with OPEN */
4a1e2feb
TM		 1268 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1269 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1270 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1271 nfs_resync_open_stateid_locked(state);
226056c5 1272 return;
f95549cf 1273 }
003707c7 1274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1275 nfs4_stateid_copy(&state->stateid, stateid);
1276 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1277}
1278
4a1e2feb
TM		 1279static void nfs_clear_open_stateid(struct nfs4_state *state,
1280 nfs4_stateid *arg_stateid,
1281 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1282{
1283 write_seqlock(&state->seqlock);
4a1e2feb 1284 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1285 write_sequnlock(&state->seqlock);
4f14c194
TM		 1286 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1287 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1288}
1289
dc0b027d 1290static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1291{
dc0b027d 1292 switch (fmode) {
003707c7
TM		 1293 case FMODE_READ:
1294 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1295 break;
1296 case FMODE_WRITE:
1297 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1298 break;
1299 case FMODE_READ|FMODE_WRITE:
1300 set_bit(NFS_O_RDWR_STATE, &state->flags);
1301 }
e999e80e
TM		 1302 if (!nfs_need_update_open_stateid(state, stateid))
1303 return;
1304 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1305 nfs4_stateid_copy(&state->stateid, stateid);
1306 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1307}
1308
dc0b027d 1309static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1310{
8bda4e4c
TM		 1311 /*
1312 * Protect the call to nfs4_state_set_mode_locked and
1313 * serialise the stateid update
1314 */
1315 write_seqlock(&state->seqlock);
003707c7 1316 if (deleg_stateid != NULL) {
f597c537 1317 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1318 set_bit(NFS_DELEGATED_STATE, &state->flags);
1319 }
1320 if (open_stateid != NULL)
dc0b027d 1321 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1322 write_sequnlock(&state->seqlock);
1323 spin_lock(&state->owner->so_lock);
dc0b027d 1324 update_open_stateflags(state, fmode);
ec073428 1325 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1326}
1327
dc0b027d 1328static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1329{
1330 struct nfs_inode *nfsi = NFS_I(state->inode);
1331 struct nfs_delegation *deleg_cur;
1332 int ret = 0;
1333
dc0b027d 1334 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1335
1336 rcu_read_lock();
1337 deleg_cur = rcu_dereference(nfsi->delegation);
1338 if (deleg_cur == NULL)
1339 goto no_delegation;
1340
1341 spin_lock(&deleg_cur->lock);
17f26b12 1342 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1343 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1344 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1345 goto no_delegation_unlock;
1346
1347 if (delegation == NULL)
1348 delegation = &deleg_cur->stateid;
f597c537 1349 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1350 goto no_delegation_unlock;
1351
b7391f44 1352 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1353 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1354 ret = 1;
1355no_delegation_unlock:
1356 spin_unlock(&deleg_cur->lock);
1357no_delegation:
1358 rcu_read_unlock();
1359
1360 if (!ret && open_stateid != NULL) {
dc0b027d 1361 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1362 ret = 1;
1363 }
4f14c194
TM		 1364 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1365 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1366
1367 return ret;
1368}
1369
39071e6f
TM		 1370static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1371 const nfs4_stateid *stateid)
1372{
1373 struct nfs4_state *state = lsp->ls_state;
1374 bool ret = false;
1375
1376 spin_lock(&state->state_lock);
1377 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1378 goto out_noupdate;
1379 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1380 goto out_noupdate;
1381 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1382 ret = true;
1383out_noupdate:
1384 spin_unlock(&state->state_lock);
1385 return ret;
1386}
34310430 1387
dc0b027d 1388static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1389{
1390 struct nfs_delegation *delegation;
1391
1392 rcu_read_lock();
1393 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1394 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1395 rcu_read_unlock();
1396 return;
1397 }
1398 rcu_read_unlock();
57ec14c5 1399 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1400}
1401
6ee41268 1402static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1403{
1404 struct nfs4_state *state = opendata->state;
1405 struct nfs_inode *nfsi = NFS_I(state->inode);
1406 struct nfs_delegation *delegation;
f448badd 1407 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1408 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1409 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1410 nfs4_stateid stateid;
1411 int ret = -EAGAIN;
1412
aac00a8d 1413 for (;;) {
61beef75 1414 spin_lock(&state->owner->so_lock);
dc0b027d 1415 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1416 update_open_stateflags(state, fmode);
6ee41268 1417 spin_unlock(&state->owner->so_lock);
61beef75 1418 goto out_return_state;
6ee41268 1419 }
61beef75 1420 spin_unlock(&state->owner->so_lock);
34310430
TM		 1421 rcu_read_lock();
1422 delegation = rcu_dereference(nfsi->delegation);
2a606188 1423 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1424 rcu_read_unlock();
aac00a8d 1425 break;
34310430 1426 }
aac00a8d 1427 /* Save the delegation */
f597c537 1428 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1429 rcu_read_unlock();
fa332941 1430 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1431 if (!opendata->is_recover) {
1432 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1433 if (ret != 0)
1434 goto out;
1435 }
aac00a8d 1436 ret = -EAGAIN;
34310430
TM		 1437
1438 /* Try to update the stateid using the delegation */
dc0b027d 1439 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1440 goto out_return_state;
aac00a8d 1441 }
aac00a8d
TM		 1442out:
1443 return ERR_PTR(ret);
1444out_return_state:
1445 atomic_inc(&state->count);
1446 return state;
1447}
1448
e23008ec
AA		 1449static void
1450nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1451{
1452 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1453 struct nfs_delegation *delegation;
1454 int delegation_flags = 0;
1455
1456 rcu_read_lock();
1457 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1458 if (delegation)
1459 delegation_flags = delegation->flags;
1460 rcu_read_unlock();
72d79ff8
TM		 1461 switch (data->o_arg.claim) {
1462 default:
1463 break;
1464 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1465 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1466 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1467 "returning a delegation for "
1468 "OPEN(CLAIM_DELEGATE_CUR)\n",
1469 clp->cl_hostname);
72d79ff8
TM		 1470 return;
1471 }
1472 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1473 nfs_inode_set_delegation(state->inode,
1474 data->owner->so_cred,
1475 &data->o_res);
1476 else
1477 nfs_inode_reclaim_delegation(state->inode,
1478 data->owner->so_cred,
1479 &data->o_res);
1480}
1481
1482/*
1483 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1484 * and update the nfs4_state.
1485 */
1486static struct nfs4_state *
1487_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1488{
1489 struct inode *inode = data->state->inode;
1490 struct nfs4_state *state = data->state;
1491 int ret;
1492
d2bfda2e
WAA		 1493 if (!data->rpc_done) {
1494 if (data->rpc_status) {
1495 ret = data->rpc_status;
1496 goto err;
1497 }
1498 /* cached opens have already been processed */
1499 goto update;
e23008ec
AA		 1500 }
1501
e23008ec
AA		 1502 ret = nfs_refresh_inode(inode, &data->f_attr);
1503 if (ret)
1504 goto err;
1505
1506 if (data->o_res.delegation_type != 0)
1507 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1508update:
e23008ec
AA		 1509 update_open_stateid(state, &data->o_res.stateid, NULL,
1510 data->o_arg.fmode);
d49f042a 1511 atomic_inc(&state->count);
e23008ec
AA		 1512
1513 return state;
1514err:
1515 return ERR_PTR(ret);
1516
1517}
1518
1519static struct nfs4_state *
1520_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1521{
1522 struct inode *inode;
1523 struct nfs4_state *state = NULL;
1b370bc2 1524 int ret;
24ac23ab 1525
aac00a8d 1526 if (!data->rpc_done) {
6ee41268 1527 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1528 goto out;
1529 }
1530
1b370bc2 1531 ret = -EAGAIN;
24ac23ab 1532 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1533 goto err;
1775fd3e 1534 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1535 ret = PTR_ERR(inode);
03f28e3a 1536 if (IS_ERR(inode))
1b370bc2
TM		 1537 goto err;
1538 ret = -ENOMEM;
24ac23ab
TM		 1539 state = nfs4_get_open_state(inode, data->owner);
1540 if (state == NULL)
1b370bc2 1541 goto err_put_inode;
e23008ec
AA		 1542 if (data->o_res.delegation_type != 0)
1543 nfs4_opendata_check_deleg(data, state);
34310430 1544 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1545 data->o_arg.fmode);
24ac23ab 1546 iput(inode);
aac00a8d 1547out:
7aa262b5 1548 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1549 return state;
1b370bc2
TM		 1550err_put_inode:
1551 iput(inode);
1552err:
1553 return ERR_PTR(ret);
24ac23ab
TM		 1554}
1555
e23008ec
AA		 1556static struct nfs4_state *
1557nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1558{
1559 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1560 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1561 return _nfs4_opendata_to_nfs4_state(data);
1562}
1563
864472e9
TM		 1564static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1565{
1566 struct nfs_inode *nfsi = NFS_I(state->inode);
1567 struct nfs_open_context *ctx;
1568
1569 spin_lock(&state->inode->i_lock);
1570 list_for_each_entry(ctx, &nfsi->open_files, list) {
1571 if (ctx->state != state)
1572 continue;
1573 get_nfs_open_context(ctx);
1574 spin_unlock(&state->inode->i_lock);
1575 return ctx;
1576 }
1577 spin_unlock(&state->inode->i_lock);
1578 return ERR_PTR(-ENOENT);
1579}
1580
4a1c0893
TM		 1581static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1582 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1583{
1584 struct nfs4_opendata *opendata;
1585
4a1c0893 1586 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1587 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1588 if (opendata == NULL)
1589 return ERR_PTR(-ENOMEM);
1590 opendata->state = state;
1591 atomic_inc(&state->count);
1592 return opendata;
1593}
1594
24311f88
TM		 1595static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1596 fmode_t fmode)
864472e9 1597{
2ced46c2 1598 struct nfs4_state *newstate;
864472e9
TM		 1599 int ret;
1600
24311f88 1601 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1602 return 0;
dc0b027d
TM		 1603 opendata->o_arg.open_flags = 0;
1604 opendata->o_arg.fmode = fmode;
be36e185
TM		 1605 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1606 NFS_SB(opendata->dentry->d_sb),
1607 fmode, 0);
2ced46c2
TM		 1608 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1609 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1610 nfs4_init_opendata_res(opendata);
b257957e 1611 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1612 if (ret != 0)
1613 return ret;
2ced46c2 1614 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1615 if (IS_ERR(newstate))
1616 return PTR_ERR(newstate);
24311f88
TM		 1617 if (newstate != opendata->state)
1618 ret = -ESTALE;
643168c2 1619 nfs4_close_state(newstate, fmode);
24311f88 1620 return ret;
864472e9
TM		 1621}
1622
1623static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1624{
864472e9
TM		 1625 int ret;
1626
4f14c194
TM		 1627 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1628 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1629 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1630 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1631 /* memory barrier prior to reading state->n_* */
2ced46c2 1632 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1633 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1634 smp_rmb();
24311f88
TM		 1635 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1636 if (ret != 0)
1637 return ret;
1638 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1639 if (ret != 0)
1640 return ret;
1641 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1642 if (ret != 0)
1643 return ret;
1ac7e2fd
TM		 1644 /*
1645 * We may have performed cached opens for all three recoveries.
1646 * Check if we need to update the current stateid.
1647 */
1648 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1649 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1650 write_seqlock(&state->seqlock);
1ac7e2fd 1651 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1652 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1653 write_sequnlock(&state->seqlock);
1ac7e2fd 1654 }
864472e9
TM		 1655 return 0;
1656}
1657
1da177e4
LT		 1658/*
1659 * OPEN_RECLAIM:
1660 * reclaim state on the server after a reboot.
1da177e4 1661 */
539cd03a 1662static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1663{
1ac7e2fd 1664 struct nfs_delegation *delegation;
864472e9 1665 struct nfs4_opendata *opendata;
dc0b027d 1666 fmode_t delegation_type = 0;
1da177e4
LT		 1667 int status;
1668
4a1c0893
TM		 1669 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1670 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1671 if (IS_ERR(opendata))
1672 return PTR_ERR(opendata);
1ac7e2fd
TM		 1673 rcu_read_lock();
1674 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1675 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1676 delegation_type = delegation->type;
1ac7e2fd 1677 rcu_read_unlock();
864472e9
TM		 1678 opendata->o_arg.u.delegation_type = delegation_type;
1679 status = nfs4_open_recover(opendata, state);
c6d00e63 1680 nfs4_opendata_put(opendata);
1da177e4
LT		 1681 return status;
1682}
1683
539cd03a 1684static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1685{
1686 struct nfs_server *server = NFS_SERVER(state->inode);
1687 struct nfs4_exception exception = { };
1688 int err;
1689 do {
539cd03a 1690 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1691 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1692 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1693 continue;
168667c4 1694 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1695 break;
1696 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1697 } while (exception.retry);
1698 return err;
1699}
1700
864472e9
TM		 1701static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1702{
1703 struct nfs_open_context *ctx;
1704 int ret;
1705
1706 ctx = nfs4_state_find_open_context(state);
1707 if (IS_ERR(ctx))
91876b13 1708 return -EAGAIN;
539cd03a 1709 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1710 put_nfs_open_context(ctx);
1711 return ret;
1712}
1713
db4f2e63 1714static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1715{
be76b5b6
TM		 1716 switch (err) {
1717 default:
1718 printk(KERN_ERR "NFS: %s: unhandled error "
1719 "%d.\n", __func__, err);
1720 case 0:
1721 case -ENOENT:
8eee52af 1722 case -EAGAIN:
be76b5b6
TM		 1723 case -ESTALE:
1724 break;
1725 case -NFS4ERR_BADSESSION:
1726 case -NFS4ERR_BADSLOT:
1727 case -NFS4ERR_BAD_HIGH_SLOT:
1728 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1729 case -NFS4ERR_DEADSESSION:
1730 set_bit(NFS_DELEGATED_STATE, &state->flags);
1731 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1732 return -EAGAIN;
1733 case -NFS4ERR_STALE_CLIENTID:
1734 case -NFS4ERR_STALE_STATEID:
1735 set_bit(NFS_DELEGATED_STATE, &state->flags);
1736 case -NFS4ERR_EXPIRED:
1737 /* Don't recall a delegation if it was lost */
1738 nfs4_schedule_lease_recovery(server->nfs_client);
1739 return -EAGAIN;
352297b9
CL		 1740 case -NFS4ERR_MOVED:
1741 nfs4_schedule_migration_recovery(server);
1742 return -EAGAIN;
8ef2f8d4
CL		 1743 case -NFS4ERR_LEASE_MOVED:
1744 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1745 return -EAGAIN;
be76b5b6
TM		 1746 case -NFS4ERR_DELEG_REVOKED:
1747 case -NFS4ERR_ADMIN_REVOKED:
1748 case -NFS4ERR_BAD_STATEID:
db4f2e63 1749 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1750 nfs_inode_find_state_and_recover(state->inode,
1751 stateid);
1752 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1753 return -EAGAIN;
be76b5b6
TM		 1754 case -NFS4ERR_DELAY:
1755 case -NFS4ERR_GRACE:
1756 set_bit(NFS_DELEGATED_STATE, &state->flags);
1757 ssleep(1);
1758 return -EAGAIN;
db4f2e63
TM		 1759 case -ENOMEM:
1760 case -NFS4ERR_DENIED:
1761 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1762 return 0;
be76b5b6 1763 }
1da177e4
LT		 1764 return err;
1765}
1766
24311f88
TM		 1767int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1768 struct nfs4_state *state, const nfs4_stateid *stateid,
1769 fmode_t type)
db4f2e63
TM		 1770{
1771 struct nfs_server *server = NFS_SERVER(state->inode);
1772 struct nfs4_opendata *opendata;
24311f88 1773 int err = 0;
db4f2e63
TM		 1774
1775 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1776 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1777 if (IS_ERR(opendata))
1778 return PTR_ERR(opendata);
1779 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1780 write_seqlock(&state->seqlock);
1781 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1782 write_sequnlock(&state->seqlock);
24311f88
TM		 1783 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1784 switch (type & (FMODE_READ|FMODE_WRITE)) {
1785 case FMODE_READ|FMODE_WRITE:
1786 case FMODE_WRITE:
1787 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1788 if (err)
1789 break;
1790 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1791 if (err)
1792 break;
1793 case FMODE_READ:
1794 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1795 }
db4f2e63
TM		 1796 nfs4_opendata_put(opendata);
1797 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1798}
1799
be05c860
CL		 1800static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1801{
1802 struct nfs4_opendata *data = calldata;
1803
cb04ad2a
PT		 1804 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1805 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1806}
1807
cdd4e68b
TM		 1808static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1809{
1810 struct nfs4_opendata *data = calldata;
1811
17ead6c8 1812 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1813
cdd4e68b 1814 data->rpc_status = task->tk_status;
26e976a8 1815 if (data->rpc_status == 0) {
f597c537 1816 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1817 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1818 renew_lease(data->o_res.server, data->timestamp);
3e309914 1819 data->rpc_done = 1;
26e976a8 1820 }
cdd4e68b
TM		 1821}
1822
1823static void nfs4_open_confirm_release(void *calldata)
1824{
1825 struct nfs4_opendata *data = calldata;
1826 struct nfs4_state *state = NULL;
1827
1828 /* If this request hasn't been cancelled, do nothing */
1829 if (data->cancelled == 0)
1830 goto out_free;
1831 /* In case of error, no cleanup! */
3e309914 1832 if (!data->rpc_done)
cdd4e68b 1833 goto out_free;
cdd4e68b 1834 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1835 if (!IS_ERR(state))
643168c2 1836 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1837out_free:
c6d00e63 1838 nfs4_opendata_put(data);
cdd4e68b
TM		 1839}
1840
1841static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1842 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1843 .rpc_call_done = nfs4_open_confirm_done,
1844 .rpc_release = nfs4_open_confirm_release,
1845};
1846
1847/*
1848 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1849 */
1850static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1851{
2b0143b5 1852 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1853 struct rpc_task *task;
5138fde0
TM		 1854 struct rpc_message msg = {
1855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1856 .rpc_argp = &data->c_arg,
1857 .rpc_resp = &data->c_res,
1858 .rpc_cred = data->owner->so_cred,
1859 };
c970aa85
TM		 1860 struct rpc_task_setup task_setup_data = {
1861 .rpc_client = server->client,
5138fde0 1862 .rpc_message = &msg,
c970aa85
TM		 1863 .callback_ops = &nfs4_open_confirm_ops,
1864 .callback_data = data,
101070ca 1865 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1866 .flags = RPC_TASK_ASYNC,
1867 };
1da177e4
LT		 1868 int status;
1869
17ead6c8 1870 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1871 kref_get(&data->kref);
3e309914
TM		 1872 data->rpc_done = 0;
1873 data->rpc_status = 0;
5138fde0 1874 data->timestamp = jiffies;
e92c1e0d
BC		 1875 if (data->is_recover)
1876 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1877 task = rpc_run_task(&task_setup_data);
7a1218a2 1878 if (IS_ERR(task))
cdd4e68b 1879 return PTR_ERR(task);
cdd4e68b
TM		 1880 status = nfs4_wait_for_completion_rpc_task(task);
1881 if (status != 0) {
1882 data->cancelled = 1;
1883 smp_wmb();
1884 } else
1885 status = data->rpc_status;
e6b3c4db 1886 rpc_put_task(task);
1da177e4
LT		 1887 return status;
1888}
1889
24ac23ab 1890static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1891{
24ac23ab
TM		 1892 struct nfs4_opendata *data = calldata;
1893 struct nfs4_state_owner *sp = data->owner;
549b19cc 1894 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1895 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1896
24ac23ab 1897 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1898 goto out_wait;
aac00a8d
TM		 1899 /*
1900 * Check if we still need to send an OPEN call, or if we can use
1901 * a delegation instead.
1902 */
1903 if (data->state != NULL) {
1904 struct nfs_delegation *delegation;
1905
dc0b027d 1906 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1907 goto out_no_action;
aac00a8d
TM		 1908 rcu_read_lock();
1909 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1910 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1911 goto unlock_no_action;
aac00a8d
TM		 1912 rcu_read_unlock();
1913 }
95b72eb0 1914 /* Update client id. */
549b19cc 1915 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1916 switch (claim) {
1917 default:
1918 break;
8188df17
TM		 1919 case NFS4_OPEN_CLAIM_PREVIOUS:
1920 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1921 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1922 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1923 case NFS4_OPEN_CLAIM_FH:
1924 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1925 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1926 }
26e976a8 1927 data->timestamp = jiffies;
035168ab 1928 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1929 &data->o_arg.seq_args,
2240a9e2
TM		 1930 &data->o_res.seq_res,
1931 task) != 0)
1932 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1933
1934 /* Set the create mode (note dependency on the session type) */
1935 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1936 if (data->o_arg.open_flags & O_EXCL) {
1937 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1938 if (nfs4_has_persistent_session(clp))
1939 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1940 else if (clp->cl_mvops->minor_version > 0)
1941 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1942 }
6ee41268 1943 return;
652f89f6
TM		 1944unlock_no_action:
1945 rcu_read_unlock();
6ee41268
TM		 1946out_no_action:
1947 task->tk_action = NULL;
c8da19b9 1948out_wait:
b75ad4cd 1949 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1950}
1951
24ac23ab
TM		 1952static void nfs4_open_done(struct rpc_task *task, void *calldata)
1953{
1954 struct nfs4_opendata *data = calldata;
1da177e4 1955
24ac23ab 1956 data->rpc_status = task->tk_status;
d898528c 1957
14516c3a
TM		 1958 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1959 return;
d898528c 1960
24ac23ab 1961 if (task->tk_status == 0) {
807d66d8
TM		 1962 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1963 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1964 case S_IFREG:
1965 break;
1966 case S_IFLNK:
24ac23ab 1967 data->rpc_status = -ELOOP;
6f926b5b
TM		 1968 break;
1969 case S_IFDIR:
24ac23ab 1970 data->rpc_status = -EISDIR;
6f926b5b
TM		 1971 break;
1972 default:
24ac23ab 1973 data->rpc_status = -ENOTDIR;
807d66d8 1974 }
6f926b5b 1975 }
26e976a8 1976 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1977 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1978 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1979 }
3e309914 1980 data->rpc_done = 1;
24ac23ab 1981}
6f926b5b 1982
24ac23ab
TM		 1983static void nfs4_open_release(void *calldata)
1984{
1985 struct nfs4_opendata *data = calldata;
1986 struct nfs4_state *state = NULL;
1987
1988 /* If this request hasn't been cancelled, do nothing */
1989 if (data->cancelled == 0)
1990 goto out_free;
1991 /* In case of error, no cleanup! */
3e309914 1992 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1993 goto out_free;
1994 /* In case we need an open_confirm, no cleanup! */
1995 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1996 goto out_free;
24ac23ab 1997 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1998 if (!IS_ERR(state))
643168c2 1999 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2000out_free:
c6d00e63 2001 nfs4_opendata_put(data);
24ac23ab
TM		 2002}
2003
2004static const struct rpc_call_ops nfs4_open_ops = {
2005 .rpc_call_prepare = nfs4_open_prepare,
2006 .rpc_call_done = nfs4_open_done,
2007 .rpc_release = nfs4_open_release,
2008};
2009
b257957e 2010static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2011{
2b0143b5 2012 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2013 struct nfs_server *server = NFS_SERVER(dir);
2014 struct nfs_openargs *o_arg = &data->o_arg;
2015 struct nfs_openres *o_res = &data->o_res;
2016 struct rpc_task *task;
5138fde0
TM		 2017 struct rpc_message msg = {
2018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2019 .rpc_argp = o_arg,
2020 .rpc_resp = o_res,
2021 .rpc_cred = data->owner->so_cred,
2022 };
c970aa85
TM		 2023 struct rpc_task_setup task_setup_data = {
2024 .rpc_client = server->client,
5138fde0 2025 .rpc_message = &msg,
c970aa85
TM		 2026 .callback_ops = &nfs4_open_ops,
2027 .callback_data = data,
101070ca 2028 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2029 .flags = RPC_TASK_ASYNC,
2030 };
24ac23ab
TM		 2031 int status;
2032
a9c92d6b 2033 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2034 kref_get(&data->kref);
3e309914
TM		 2035 data->rpc_done = 0;
2036 data->rpc_status = 0;
2ced46c2 2037 data->cancelled = 0;
bdeca1b7
TM		 2038 data->is_recover = 0;
2039 if (isrecover) {
8fe72bac 2040 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2041 data->is_recover = 1;
2042 }
c970aa85 2043 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2044 if (IS_ERR(task))
2045 return PTR_ERR(task);
2046 status = nfs4_wait_for_completion_rpc_task(task);
2047 if (status != 0) {
2048 data->cancelled = 1;
2049 smp_wmb();
2050 } else
2051 status = data->rpc_status;
2052 rpc_put_task(task);
2053
2054 return status;
2055}
2056
2057static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2058{
2b0143b5 2059 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2060 struct nfs_openres *o_res = &data->o_res;
2061 int status;
2062
2063 status = nfs4_run_open_task(data, 1);
2064 if (status != 0 || !data->rpc_done)
2065 return status;
2066
6926afd1
TM		 2067 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2068
b257957e
AB		 2069 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2070 status = _nfs4_proc_open_confirm(data);
2071 if (status != 0)
2072 return status;
2073 }
2074
2075 return status;
2076}
2077
f3792d63
TM		 2078/*
2079 * Additional permission checks in order to distinguish between an
2080 * open for read, and an open for execute. This works around the
2081 * fact that NFSv4 OPEN treats read and execute permissions as being
2082 * the same.
2083 * Note that in the non-execute case, we want to turn off permission
2084 * checking if we just created a new file (POSIX open() semantics).
2085 */
6168f62c
WAA		 2086static int nfs4_opendata_access(struct rpc_cred *cred,
2087 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2088 struct nfs4_state *state, fmode_t fmode,
2089 int openflags)
6168f62c
WAA		 2090{
2091 struct nfs_access_entry cache;
2092 u32 mask;
2093
2094 /* access call failed or for some reason the server doesn't
2095 * support any access modes -- defer access call until later */
2096 if (opendata->o_res.access_supported == 0)
2097 return 0;
2098
2099 mask = 0;
f3792d63
TM		 2100 /*
2101 * Use openflags to check for exec, because fmode won't
2102 * always have FMODE_EXEC set when file open for exec.
2103 */
f8d9a897
WAA		 2104 if (openflags & __FMODE_EXEC) {
2105 /* ONLY check for exec rights */
2106 mask = MAY_EXEC;
f3792d63 2107 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2108 mask = MAY_READ;
6168f62c
WAA		 2109
2110 cache.cred = cred;
2111 cache.jiffies = jiffies;
2112 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2113 nfs_access_add_cache(state->inode, &cache);
2114
bbd3a8ee 2115 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2116 return 0;
2117
2118 /* even though OPEN succeeded, access is denied. Close the file */
2119 nfs4_close_state(state, fmode);
998f40b5 2120 return -EACCES;
6168f62c
WAA		 2121}
2122
b257957e
AB		 2123/*
2124 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2125 */
2126static int _nfs4_proc_open(struct nfs4_opendata *data)
2127{
2b0143b5 2128 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2129 struct nfs_server *server = NFS_SERVER(dir);
2130 struct nfs_openargs *o_arg = &data->o_arg;
2131 struct nfs_openres *o_res = &data->o_res;
2132 int status;
2133
2134 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2135 if (!data->rpc_done)
2136 return status;
2137 if (status != 0) {
2138 if (status == -NFS4ERR_BADNAME &&
2139 !(o_arg->open_flags & O_CREAT))
2140 return -ENOENT;
24ac23ab 2141 return status;
08ef7bd3 2142 }
24ac23ab 2143
6926afd1
TM		 2144 nfs_fattr_map_and_free_names(server, &data->f_attr);
2145
5bc2afc2 2146 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2147 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2148 if (o_arg->open_flags & O_EXCL)
2149 data->file_created = 1;
2150 else if (o_res->cinfo.before != o_res->cinfo.after)
2151 data->file_created = 1;
2152 }
0df5dd4a
TM		 2153 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2154 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2155 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2156 status = _nfs4_proc_open_confirm(data);
1da177e4 2157 if (status != 0)
24ac23ab 2158 return status;
1da177e4
LT		 2159 }
2160 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2161 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2162 return 0;
1da177e4
LT		 2163}
2164
d83217c1
AA		 2165static int nfs4_recover_expired_lease(struct nfs_server *server)
2166{
2167 return nfs4_client_recover_expired_lease(server->nfs_client);
2168}
2169
1da177e4
LT		 2170/*
2171 * OPEN_EXPIRED:
2172 * reclaim state on the server after a network partition.
2173 * Assumes caller holds the appropriate lock
2174 */
539cd03a 2175static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2176{
e56e0b78 2177 struct nfs4_opendata *opendata;
864472e9 2178 int ret;
1da177e4 2179
4a1c0893 2180 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2181 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2182 if (IS_ERR(opendata))
2183 return PTR_ERR(opendata);
864472e9 2184 ret = nfs4_open_recover(opendata, state);
35d05778 2185 if (ret == -ESTALE)
3d4ff43d 2186 d_drop(ctx->dentry);
c6d00e63 2187 nfs4_opendata_put(opendata);
864472e9 2188 return ret;
1da177e4
LT		 2189}
2190
a9ed2e25 2191static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2192{
539cd03a 2193 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2194 struct nfs4_exception exception = { };
2195 int err;
2196
2197 do {
539cd03a 2198 err = _nfs4_open_expired(ctx, state);
42113a75 2199 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2200 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2201 continue;
a9ed2e25
TM		 2202 switch (err) {
2203 default:
2204 goto out;
2205 case -NFS4ERR_GRACE:
2206 case -NFS4ERR_DELAY:
2207 nfs4_handle_exception(server, err, &exception);
2208 err = 0;
2209 }
202b50dc 2210 } while (exception.retry);
a9ed2e25 2211out:
202b50dc
TM		 2212 return err;
2213}
2214
1da177e4
LT		 2215static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2216{
1da177e4 2217 struct nfs_open_context *ctx;
864472e9 2218 int ret;
1da177e4 2219
864472e9
TM		 2220 ctx = nfs4_state_find_open_context(state);
2221 if (IS_ERR(ctx))
91876b13 2222 return -EAGAIN;
539cd03a 2223 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2224 put_nfs_open_context(ctx);
2225 return ret;
1da177e4
LT		 2226}
2227
4dfd4f7a
TM		 2228static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2229{
2230 nfs_remove_bad_delegation(state->inode);
2231 write_seqlock(&state->seqlock);
2232 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2233 write_sequnlock(&state->seqlock);
2234 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2235}
2236
2237static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2238{
2239 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2240 nfs_finish_clear_delegation_stateid(state);
2241}
2242
2243static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2244{
2245 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2246 nfs40_clear_delegation_stateid(state);
2247 return nfs4_open_expired(sp, state);
2248}
2249
f062eb6c 2250#if defined(CONFIG_NFS_V4_1)
0c116cad 2251static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2252{
f062eb6c 2253 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2254 nfs4_stateid stateid;
ab7cb0df 2255 struct nfs_delegation *delegation;
0c116cad
TM		 2256 struct rpc_cred *cred;
2257 int status;
3e60ffdd 2258
ab7cb0df
TM		 2259 /* Get the delegation credential for use by test/free_stateid */
2260 rcu_read_lock();
2261 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2262 if (delegation == NULL) {
ab7cb0df 2263 rcu_read_unlock();
0c116cad
TM		 2264 return;
2265 }
2266
2267 nfs4_stateid_copy(&stateid, &delegation->stateid);
2268 cred = get_rpccred(delegation->cred);
2269 rcu_read_unlock();
2270 status = nfs41_test_stateid(server, &stateid, cred);
2271 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2272
3e60ffdd
CL		 2273 if (status != NFS_OK) {
2274 /* Free the stateid unless the server explicitly
2275 * informs us the stateid is unrecognized. */
2276 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2277 nfs41_free_stateid(server, &stateid, cred);
2278 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2279 }
ab7cb0df 2280
0c116cad 2281 put_rpccred(cred);
3e60ffdd
CL		 2282}
2283
2284/**
2285 * nfs41_check_open_stateid - possibly free an open stateid
2286 *
2287 * @state: NFSv4 state for an inode
2288 *
2289 * Returns NFS_OK if recovery for this stateid is now finished.
2290 * Otherwise a negative NFS4ERR value is returned.
2291 */
2292static int nfs41_check_open_stateid(struct nfs4_state *state)
2293{
2294 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2295 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2296 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2297 int status;
2298
2299 /* If a state reset has been done, test_stateid is unneeded */
2300 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2301 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2302 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2303 return -NFS4ERR_BAD_STATEID;
2304
ab7cb0df 2305 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2306 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2307 if (status != NFS_OK) {
2308 /* Free the stateid unless the server explicitly
2309 * informs us the stateid is unrecognized. */
2310 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2311 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2312
2313 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2314 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2315 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2316 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2317 }
2318 return status;
2319}
2320
2321static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2322{
eb64cf96 2323 int status;
b01dd1d8 2324
0c116cad 2325 nfs41_check_delegation_stateid(state);
3e60ffdd 2326 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2327 if (status != NFS_OK)
2328 status = nfs4_open_expired(sp, state);
2329 return status;
f062eb6c
BS		 2330}
2331#endif
2332
aa53ed54
JL		 2333/*
2334 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2335 * fields corresponding to attributes that were used to store the verifier.
2336 * Make sure we clobber those fields in the later setattr call
2337 */
5334c5bd
KM		 2338static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2339 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2340{
5334c5bd
KM		 2341 const u32 *attrset = opendata->o_res.attrset;
2342
2343 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2344 !(sattr->ia_valid & ATTR_ATIME_SET))
2345 sattr->ia_valid |= ATTR_ATIME;
2346
5334c5bd 2347 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2348 !(sattr->ia_valid & ATTR_MTIME_SET))
2349 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2350
2351 /* Except MODE, it seems harmless of setting twice. */
2352 if ((attrset[1] & FATTR4_WORD1_MODE))
2353 sattr->ia_valid &= ~ATTR_MODE;
2354
2355 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2356 *label = NULL;
aa53ed54
JL		 2357}
2358
c21443c2
TM		 2359static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2360 fmode_t fmode,
2361 int flags,
3efb9722 2362 struct nfs_open_context *ctx)
c21443c2
TM		 2363{
2364 struct nfs4_state_owner *sp = opendata->owner;
2365 struct nfs_server *server = sp->so_server;
275bb307 2366 struct dentry *dentry;
c21443c2
TM		 2367 struct nfs4_state *state;
2368 unsigned int seq;
2369 int ret;
2370
2371 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2372
2373 ret = _nfs4_proc_open(opendata);
dca78001 2374 if (ret != 0)
c21443c2
TM		 2375 goto out;
2376
2377 state = nfs4_opendata_to_nfs4_state(opendata);
2378 ret = PTR_ERR(state);
2379 if (IS_ERR(state))
2380 goto out;
2381 if (server->caps & NFS_CAP_POSIX_LOCK)
2382 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2383
275bb307 2384 dentry = opendata->dentry;
2b0143b5 2385 if (d_really_is_negative(dentry)) {
275bb307
TM		 2386 /* FIXME: Is this d_drop() ever needed? */
2387 d_drop(dentry);
2388 dentry = d_add_unique(dentry, igrab(state->inode));
2389 if (dentry == NULL) {
2390 dentry = opendata->dentry;
2391 } else if (dentry != ctx->dentry) {
2392 dput(ctx->dentry);
2393 ctx->dentry = dget(dentry);
2394 }
2395 nfs_set_verifier(dentry,
2b0143b5 2396 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2397 }
2398
c21443c2
TM		 2399 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2400 if (ret != 0)
2401 goto out;
2402
3efb9722 2403 ctx->state = state;
2b0143b5 2404 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2405 nfs_inode_attach_open_context(ctx);
2406 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2407 nfs4_schedule_stateid_recovery(server, state);
2408 }
c21443c2
TM		 2409out:
2410 return ret;
2411}
2412
1da177e4 2413/*
24ac23ab 2414 * Returns a referenced nfs4_state
1da177e4 2415 */
82be417a 2416static int _nfs4_do_open(struct inode *dir,
4197a055 2417 struct nfs_open_context *ctx,
82be417a
AA		 2418 int flags,
2419 struct iattr *sattr,
5bc2afc2
TM		 2420 struct nfs4_label *label,
2421 int *opened)
1da177e4
LT		 2422{
2423 struct nfs4_state_owner *sp;
2424 struct nfs4_state *state = NULL;
2425 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2426 struct nfs4_opendata *opendata;
4197a055
TM		 2427 struct dentry *dentry = ctx->dentry;
2428 struct rpc_cred *cred = ctx->cred;
2429 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2430 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2431 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2432 struct nfs4_label *olabel = NULL;
aac00a8d 2433 int status;
1da177e4
LT		 2434
2435 /* Protect against reboot recovery conflicts */
1da177e4 2436 status = -ENOMEM;
d1e284d5
TM		 2437 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2438 if (sp == NULL) {
1da177e4
LT		 2439 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2440 goto out_err;
2441 }
58d9714a
TM		 2442 status = nfs4_recover_expired_lease(server);
2443 if (status != 0)
b4454fe1 2444 goto err_put_state_owner;
2b0143b5
DH		 2445 if (d_really_is_positive(dentry))
2446 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2447 status = -ENOMEM;
2b0143b5 2448 if (d_really_is_positive(dentry))
49f9a0fa 2449 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2450 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2451 label, claim, GFP_KERNEL);
e56e0b78 2452 if (opendata == NULL)
95d35cb4 2453 goto err_put_state_owner;
1da177e4 2454
14c43f76
DQ		 2455 if (label) {
2456 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2457 if (IS_ERR(olabel)) {
2458 status = PTR_ERR(olabel);
2459 goto err_opendata_put;
2460 }
2461 }
2462
e911b815
TM		 2463 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2464 if (!opendata->f_attr.mdsthreshold) {
2465 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2466 if (!opendata->f_attr.mdsthreshold)
2467 goto err_free_label;
2468 }
1549210f 2469 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2470 }
2b0143b5
DH		 2471 if (d_really_is_positive(dentry))
2472 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2473
3efb9722 2474 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2475 if (status != 0)
14c43f76 2476 goto err_free_label;
3efb9722 2477 state = ctx->state;
6168f62c 2478
efcbc04e 2479 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2480 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2481 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2482
2483 nfs_fattr_init(opendata->o_res.f_attr);
2484 status = nfs4_do_setattr(state->inode, cred,
2485 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2486 state, label, olabel);
2487 if (status == 0) {
f044636d
TM		 2488 nfs_setattr_update_inode(state->inode, sattr,
2489 opendata->o_res.f_attr);
aa9c2669 2490 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2491 }
0ab64e0e 2492 }
c5c3fb5f 2493 if (opened && opendata->file_created)
5bc2afc2 2494 *opened |= FILE_CREATED;
82be417a 2495
e911b815 2496 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2497 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2498 opendata->f_attr.mdsthreshold = NULL;
2499 }
82be417a 2500
14c43f76
DQ		 2501 nfs4_label_free(olabel);
2502
c6d00e63 2503 nfs4_opendata_put(opendata);
1da177e4 2504 nfs4_put_state_owner(sp);
1da177e4 2505 return 0;
14c43f76
DQ		 2506err_free_label:
2507 nfs4_label_free(olabel);
c6d00e63
TM		 2508err_opendata_put:
2509 nfs4_opendata_put(opendata);
e56e0b78
TM		 2510err_put_state_owner:
2511 nfs4_put_state_owner(sp);
1da177e4 2512out_err:
1da177e4
LT		 2513 return status;
2514}
2515
2516
82be417a 2517static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2518 struct nfs_open_context *ctx,
82be417a
AA		 2519 int flags,
2520 struct iattr *sattr,
5bc2afc2
TM		 2521 struct nfs4_label *label,
2522 int *opened)
1da177e4 2523{
49f9a0fa 2524 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2525 struct nfs4_exception exception = { };
2526 struct nfs4_state *res;
2527 int status;
2528
2529 do {
5bc2afc2 2530 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2531 res = ctx->state;
42113a75 2532 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2533 if (status == 0)
2534 break;
2535 /* NOTE: BAD_SEQID means the server and client disagree about the
2536 * book-keeping w.r.t. state-changing operations
2537 * (OPEN/CLOSE/LOCK/LOCKU...)
2538 * It is actually a sign of a bug on the client or on the server.
2539 *
2540 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2541 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2542 * have unhashed the old state_owner for us, and that we can
2543 * therefore safely retry using a new one. We should still warn
2544 * the user though...
2545 */
2546 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2547 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2548 " returned a bad sequence-id error!\n",
2549 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2550 exception.retry = 1;
2551 continue;
2552 }
550f5747
TM		 2553 /*
2554 * BAD_STATEID on OPEN means that the server cancelled our
2555 * state before it received the OPEN_CONFIRM.
2556 * Recover by retrying the request as per the discussion
2557 * on Page 181 of RFC3530.
2558 */
2559 if (status == -NFS4ERR_BAD_STATEID) {
2560 exception.retry = 1;
2561 continue;
2562 }
aac00a8d
TM		 2563 if (status == -EAGAIN) {
2564 /* We must have found a delegation */
2565 exception.retry = 1;
2566 continue;
2567 }
49f9a0fa
TM		 2568 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2569 continue;
2570 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2571 status, &exception));
2572 } while (exception.retry);
2573 return res;
2574}
2575
659bfcd6
TM		 2576static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2577 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2578 struct nfs4_state *state, struct nfs4_label *ilabel,
2579 struct nfs4_label *olabel)
1da177e4 2580{
3e4f6290 2581 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2582 struct nfs_setattrargs arg = {
3e4f6290 2583 .fh = NFS_FH(inode),
1da177e4
LT		 2584 .iap = sattr,
2585 .server = server,
2586 .bitmask = server->attr_bitmask,
1775fd3e 2587 .label = ilabel,
1da177e4
LT		 2588 };
2589 struct nfs_setattrres res = {
2590 .fattr = fattr,
1775fd3e 2591 .label = olabel,
1da177e4
LT		 2592 .server = server,
2593 };
2594 struct rpc_message msg = {
659bfcd6
TM		 2595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2596 .rpc_argp = &arg,
2597 .rpc_resp = &res,
2598 .rpc_cred = cred,
1da177e4 2599 };
26e976a8 2600 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2601 fmode_t fmode;
2602 bool truncate;
65e4308d 2603 int status;
1da177e4 2604
aa9c2669
DQ		 2605 arg.bitmask = nfs4_bitmask(server, ilabel);
2606 if (ilabel)
2607 arg.bitmask = nfs4_bitmask(server, olabel);
2608
0e574af1 2609 nfs_fattr_init(fattr);
1da177e4 2610
ee3ae84e
TM		 2611 /* Servers should only apply open mode checks for file size changes */
2612 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2613 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2614
2615 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2616 /* Use that stateid */
0418dae1 2617 } else if (truncate && state != NULL) {
2a369153
TM		 2618 struct nfs_lockowner lockowner = {
2619 .l_owner = current->files,
2620 .l_pid = current->tgid,
2621 };
0418dae1
TM		 2622 if (!nfs4_valid_open_stateid(state))
2623 return -EBADF;
2624 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2625 &lockowner) == -EIO)
2626 return -EBADF;
08e9eac4 2627 } else
f597c537 2628 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2629
7c513058 2630 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2631 if (status == 0 && state != NULL)
2632 renew_lease(server, timestamp);
65e4308d 2633 return status;
1da177e4
LT		 2634}
2635
659bfcd6
TM		 2636static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2637 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2638 struct nfs4_state *state, struct nfs4_label *ilabel,
2639 struct nfs4_label *olabel)
1da177e4 2640{
3e4f6290 2641 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2642 struct nfs4_exception exception = {
2643 .state = state,
3114ea7a 2644 .inode = inode,
a1d0b5ee 2645 };
1da177e4
LT		 2646 int err;
2647 do {
1775fd3e 2648 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2649 trace_nfs4_setattr(inode, err);
451146be
TM		 2650 switch (err) {
2651 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2652 if (!(sattr->ia_valid & ATTR_SIZE)) {
2653 pr_warn_once("NFSv4: server %s is incorrectly "
2654 "applying open mode checks to "
2655 "a SETATTR that is not "
2656 "changing file size.\n",
2657 server->nfs_client->cl_hostname);
2658 }
451146be
TM		 2659 if (state && !(state->state & FMODE_WRITE)) {
2660 err = -EBADF;
2661 if (sattr->ia_valid & ATTR_OPEN)
2662 err = -EACCES;
2663 goto out;
2664 }
2665 }
2666 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2667 } while (exception.retry);
451146be 2668out:
1da177e4
LT		 2669 return err;
2670}
2671
500d701f
PT		 2672static bool
2673nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2674{
2675 if (inode == NULL || !nfs_have_layout(inode))
2676 return false;
2677
2678 return pnfs_wait_on_layoutreturn(inode, task);
2679}
2680
1da177e4
LT		 2681struct nfs4_closedata {
2682 struct inode *inode;
2683 struct nfs4_state *state;
2684 struct nfs_closeargs arg;
2685 struct nfs_closeres res;
516a6af6 2686 struct nfs_fattr fattr;
26e976a8 2687 unsigned long timestamp;
f7e8917a
FI		 2688 bool roc;
2689 u32 roc_barrier;
1da177e4
LT		 2690};
2691
963d8fe5 2692static void nfs4_free_closedata(void *data)
9512135d 2693{
963d8fe5
TM		 2694 struct nfs4_closedata *calldata = data;
2695 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2696 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2697
f7e8917a
FI		 2698 if (calldata->roc)
2699 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2700 nfs4_put_open_state(calldata->state);
2701 nfs_free_seqid(calldata->arg.seqid);
9512135d 2702 nfs4_put_state_owner(sp);
322b2b90 2703 nfs_sb_deactive(sb);
9512135d
TM		 2704 kfree(calldata);
2705}
2706
963d8fe5 2707static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2708{
963d8fe5 2709 struct nfs4_closedata *calldata = data;
1da177e4 2710 struct nfs4_state *state = calldata->state;
1da177e4 2711 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2712 nfs4_stateid *res_stateid = NULL;
1da177e4 2713
a3ca5651 2714 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2715 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2716 return;
42113a75 2717 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2718 /* hmm. we are done with the inode, and in the process of freeing
2719 * the state_owner. we keep this around to process errors
2720 */
1da177e4
LT		 2721 switch (task->tk_status) {
2722 case 0:
412f6c4c 2723 res_stateid = &calldata->res.stateid;
3c13cb5b 2724 if (calldata->roc)
f7e8917a
FI		 2725 pnfs_roc_set_barrier(state->inode,
2726 calldata->roc_barrier);
26e976a8 2727 renew_lease(server, calldata->timestamp);
412f6c4c 2728 break;
69794ad7 2729 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2730 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2731 case -NFS4ERR_OLD_STATEID:
2732 case -NFS4ERR_BAD_STATEID:
1da177e4 2733 case -NFS4ERR_EXPIRED:
566fcec6 2734 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2735 &state->open_stateid)) {
566fcec6
TM		 2736 rpc_restart_call_prepare(task);
2737 goto out_release;
2738 }
dc0b027d 2739 if (calldata->arg.fmode == 0)
9e33bed5 2740 break;
1da177e4 2741 default:
8478eaa1 2742 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2743 rpc_restart_call_prepare(task);
69794ad7
TM		 2744 goto out_release;
2745 }
1da177e4 2746 }
4a1e2feb
TM		 2747 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2748 res_stateid, calldata->arg.fmode);
69794ad7 2749out_release:
72211dbe 2750 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2751 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2752 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2753}
2754
4ce70ada 2755static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2756{
4ce70ada 2757 struct nfs4_closedata *calldata = data;
9512135d 2758 struct nfs4_state *state = calldata->state;
7fdab069 2759 struct inode *inode = calldata->inode;
aee7af35 2760 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2761 int call_close = 0;
9512135d 2762
a3ca5651 2763 dprintk("%s: begin!\n", __func__);
963d8fe5 2764 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2765 goto out_wait;
003707c7 2766
88069f77 2767 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2768 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2769 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2770 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2771 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2772 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2773 /* Calculate the change in open mode */
cd9288ff 2774 calldata->arg.fmode = 0;
e7616923 2775 if (state->n_rdwr == 0) {
cd9288ff
TM		 2776 if (state->n_rdonly == 0)
2777 call_close |= is_rdonly;
2778 else if (is_rdonly)
2779 calldata->arg.fmode |= FMODE_READ;
2780 if (state->n_wronly == 0)
2781 call_close |= is_wronly;
2782 else if (is_wronly)
2783 calldata->arg.fmode |= FMODE_WRITE;
2784 } else if (is_rdwr)
2785 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2786
2787 if (calldata->arg.fmode == 0)
2788 call_close |= is_rdwr;
2789
5d422301
TM		 2790 if (!nfs4_valid_open_stateid(state))
2791 call_close = 0;
4cecb76f 2792 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2793
2794 if (!call_close) {
963d8fe5 2795 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2796 goto out_no_action;
9512135d 2797 }
88069f77 2798
500d701f
PT		 2799 if (nfs4_wait_on_layoutreturn(inode, task)) {
2800 nfs_release_seqid(calldata->arg.seqid);
2801 goto out_wait;
2802 }
2803
3c13cb5b 2804 if (calldata->arg.fmode == 0)
88069f77 2805 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2806 if (calldata->roc)
2807 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2808
6ae37339
TM		 2809 calldata->arg.share_access =
2810 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2811 calldata->arg.fmode, 0);
88069f77 2812
516a6af6 2813 nfs_fattr_init(calldata->res.fattr);
26e976a8 2814 calldata->timestamp = jiffies;
7fdab069 2815 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2816 &calldata->arg.seq_args,
2817 &calldata->res.seq_res,
2240a9e2
TM		 2818 task) != 0)
2819 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2820 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2821 return;
2822out_no_action:
2823 task->tk_action = NULL;
2824out_wait:
2825 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2826}
2827
963d8fe5 2828static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2829 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2830 .rpc_call_done = nfs4_close_done,
2831 .rpc_release = nfs4_free_closedata,
2832};
2833
fe08c546
PT		 2834static bool nfs4_roc(struct inode *inode)
2835{
40dd4b7a 2836 if (!nfs_have_layout(inode))
fe08c546 2837 return false;
fe08c546
PT		 2838 return pnfs_roc(inode);
2839}
2840
1da177e4
LT		 2841/*
2842 * It is possible for data to be read/written from a mem-mapped file
2843 * after the sys_close call (which hits the vfs layer as a flush).
2844 * This means that we can't safely call nfsv4 close on a file until
2845 * the inode is cleared. This in turn means that we are not good
2846 * NFSv4 citizens - we do not indicate to the server to update the file's
2847 * share state even when we are done with one of the three share
2848 * stateid's in the inode.
2849 *
2850 * NOTE: Caller must be holding the sp->so_owner semaphore!
2851 */
1f7977c1 2852int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2853{
4a35bd41 2854 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2855 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2856 struct nfs4_closedata *calldata;
b39e625b
TM		 2857 struct nfs4_state_owner *sp = state->owner;
2858 struct rpc_task *task;
5138fde0
TM		 2859 struct rpc_message msg = {
2860 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2861 .rpc_cred = state->owner->so_cred,
2862 };
c970aa85
TM		 2863 struct rpc_task_setup task_setup_data = {
2864 .rpc_client = server->client,
5138fde0 2865 .rpc_message = &msg,
c970aa85 2866 .callback_ops = &nfs4_close_ops,
101070ca 2867 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2868 .flags = RPC_TASK_ASYNC,
2869 };
9512135d 2870 int status = -ENOMEM;
1da177e4 2871
fa940720
WAA		 2872 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2873 &task_setup_data.rpc_client, &msg);
2874
8535b2be 2875 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2876 if (calldata == NULL)
9512135d 2877 goto out;
a9c92d6b 2878 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2879 calldata->inode = state->inode;
1da177e4 2880 calldata->state = state;
4a35bd41 2881 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2882 /* Serialization for the sequence id */
63f5f796
TM		 2883 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2884 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2885 if (IS_ERR(calldata->arg.seqid))
9512135d 2886 goto out_free_calldata;
dc0b027d 2887 calldata->arg.fmode = 0;
a65318bf 2888 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2889 calldata->res.fattr = &calldata->fattr;
c1d51931 2890 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2891 calldata->res.server = server;
fe08c546 2892 calldata->roc = nfs4_roc(state->inode);
643168c2 2893 nfs_sb_active(calldata->inode->i_sb);
9512135d 2894
1174dd1f
TM		 2895 msg.rpc_argp = &calldata->arg;
2896 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2897 task_setup_data.callback_data = calldata;
2898 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2899 if (IS_ERR(task))
2900 return PTR_ERR(task);
a49c3c77
TM		 2901 status = 0;
2902 if (wait)
2903 status = rpc_wait_for_completion_task(task);
b39e625b 2904 rpc_put_task(task);
a49c3c77 2905 return status;
9512135d
TM		 2906out_free_calldata:
2907 kfree(calldata);
2908out:
b39e625b
TM		 2909 nfs4_put_open_state(state);
2910 nfs4_put_state_owner(sp);
9512135d 2911 return status;
1da177e4
LT		 2912}
2913
2b484297 2914static struct inode *
5bc2afc2
TM		 2915nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2916 int open_flags, struct iattr *attr, int *opened)
1da177e4 2917{
1da177e4 2918 struct nfs4_state *state;
aa9c2669
DQ		 2919 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2920
2921 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2922
565277f6 2923 /* Protect against concurrent sillydeletes */
5bc2afc2 2924 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2925
2926 nfs4_label_release_security(label);
2927
f46e0bd3
TM		 2928 if (IS_ERR(state))
2929 return ERR_CAST(state);
275bb307 2930 return state->inode;
1da177e4
LT		 2931}
2932
1185a552 2933static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2934{
2935 if (ctx->state == NULL)
2936 return;
2937 if (is_sync)
643168c2 2938 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2939 else
643168c2 2940 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2941}
1da177e4 2942
b944dba3
TM		 2943#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2944#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2945#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2946
1da177e4
LT		 2947static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2948{
8c61282f 2949 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 2950 struct nfs4_server_caps_arg args = {
2951 .fhandle = fhandle,
8c61282f 2952 .bitmask = bitmask,
43652ad5 2953 };
1da177e4
LT		 2954 struct nfs4_server_caps_res res = {};
2955 struct rpc_message msg = {
2956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2957 .rpc_argp = &args,
1da177e4
LT		 2958 .rpc_resp = &res,
2959 };
2960 int status;
2961
8c61282f
KM		 2962 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2963 FATTR4_WORD0_FH_EXPIRE_TYPE |
2964 FATTR4_WORD0_LINK_SUPPORT |
2965 FATTR4_WORD0_SYMLINK_SUPPORT |
2966 FATTR4_WORD0_ACLSUPPORT;
2967 if (minorversion)
2968 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2969
7c513058 2970 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2971 if (status == 0) {
b944dba3 2972 /* Sanity check the server answers */
8c61282f 2973 switch (minorversion) {
b944dba3
TM		 2974 case 0:
2975 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2976 res.attr_bitmask[2] = 0;
2977 break;
2978 case 1:
2979 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2980 break;
2981 case 2:
2982 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2983 }
1da177e4 2984 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2985 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2986 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2987 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2988 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2989 NFS_CAP_CTIME|NFS_CAP_MTIME|
2990 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2991 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2992 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2993 server->caps |= NFS_CAP_ACLS;
2994 if (res.has_links != 0)
2995 server->caps |= NFS_CAP_HARDLINKS;
2996 if (res.has_symlinks != 0)
2997 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2998 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2999 server->caps |= NFS_CAP_FILEID;
3000 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3001 server->caps |= NFS_CAP_MODE;
3002 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3003 server->caps |= NFS_CAP_NLINK;
3004 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3005 server->caps |= NFS_CAP_OWNER;
3006 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3007 server->caps |= NFS_CAP_OWNER_GROUP;
3008 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3009 server->caps |= NFS_CAP_ATIME;
3010 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3011 server->caps |= NFS_CAP_CTIME;
3012 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3013 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3014#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3015 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3016 server->caps |= NFS_CAP_SECURITY_LABEL;
3017#endif
3018 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3019 sizeof(server->attr_bitmask));
b944dba3 3020 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3021
a65318bf
TM		 3022 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3023 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3024 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3025 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3026 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3027 sizeof(server->exclcreat_bitmask));
1da177e4 3028 server->acl_bitmask = res.acl_bitmask;
264e6351 3029 server->fh_expire_type = res.fh_expire_type;
1da177e4 3030 }
cccef3b9 3031
1da177e4
LT		 3032 return status;
3033}
3034
55a97593 3035int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3036{
3037 struct nfs4_exception exception = { };
3038 int err;
3039 do {
3040 err = nfs4_handle_exception(server,
3041 _nfs4_server_capabilities(server, fhandle),
3042 &exception);
3043 } while (exception.retry);
3044 return err;
3045}
3046
3047static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3048 struct nfs_fsinfo *info)
3049{
aa9c2669 3050 u32 bitmask[3];
1da177e4 3051 struct nfs4_lookup_root_arg args = {
aa9c2669 3052 .bitmask = bitmask,
1da177e4
LT		 3053 };
3054 struct nfs4_lookup_res res = {
3055 .server = server,
0e574af1 3056 .fattr = info->fattr,
1da177e4
LT		 3057 .fh = fhandle,
3058 };
3059 struct rpc_message msg = {
3060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3061 .rpc_argp = &args,
3062 .rpc_resp = &res,
3063 };
008f55d0 3064
aa9c2669
DQ		 3065 bitmask[0] = nfs4_fattr_bitmap[0];
3066 bitmask[1] = nfs4_fattr_bitmap[1];
3067 /*
3068 * Process the label in the upcoming getfattr
3069 */
3070 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3071
0e574af1 3072 nfs_fattr_init(info->fattr);
7c513058 3073 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3074}
3075
3076static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3077 struct nfs_fsinfo *info)
3078{
3079 struct nfs4_exception exception = { };
3080 int err;
3081 do {
fb8a5ba8 3082 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3083 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3084 switch (err) {
3085 case 0:
3086 case -NFS4ERR_WRONGSEC:
05e9cfb4 3087 goto out;
fb8a5ba8
BS		 3088 default:
3089 err = nfs4_handle_exception(server, err, &exception);
3090 }
1da177e4 3091 } while (exception.retry);
05e9cfb4 3092out:
1da177e4
LT		 3093 return err;
3094}
3095
8f70e95f
BS		 3096static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3097 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3098{
c2190661
TM		 3099 struct rpc_auth_create_args auth_args = {
3100 .pseudoflavor = flavor,
3101 };
8f70e95f
BS		 3102 struct rpc_auth *auth;
3103 int ret;
3104
c2190661 3105 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3106 if (IS_ERR(auth)) {
75bc8821 3107 ret = -EACCES;
8f70e95f
BS		 3108 goto out;
3109 }
3110 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3111out:
3112 return ret;
3113}
3114
9a744ba3
CL		 3115/*
3116 * Retry pseudoroot lookup with various security flavors. We do this when:
3117 *
3118 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3119 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3120 *
3121 * Returns zero on success, or a negative NFS4ERR value, or a
3122 * negative errno value.
3123 */
801a16dc 3124static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3125 struct nfs_fsinfo *info)
1da177e4 3126{
9a744ba3
CL		 3127 /* Per 3530bis 15.33.5 */
3128 static const rpc_authflavor_t flav_array[] = {
3129 RPC_AUTH_GSS_KRB5P,
3130 RPC_AUTH_GSS_KRB5I,
3131 RPC_AUTH_GSS_KRB5,
c4eafe11 3132 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3133 RPC_AUTH_NULL,
3134 };
3135 int status = -EPERM;
3136 size_t i;
6a1a1e34 3137
4d4b69dd
WAA		 3138 if (server->auth_info.flavor_len > 0) {
3139 /* try each flavor specified by user */
3140 for (i = 0; i < server->auth_info.flavor_len; i++) {
3141 status = nfs4_lookup_root_sec(server, fhandle, info,
3142 server->auth_info.flavors[i]);
3143 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3144 continue;
3145 break;
3146 }
3147 } else {
3148 /* no flavors specified by user, try default list */
3149 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3150 status = nfs4_lookup_root_sec(server, fhandle, info,
3151 flav_array[i]);
3152 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3153 continue;
3154 break;
3155 }
8f70e95f 3156 }
9a744ba3 3157
fb8a5ba8
BS		 3158 /*
3159 * -EACCESS could mean that the user doesn't have correct permissions
3160 * to access the mount. It could also mean that we tried to mount
3161 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3162 * existing mount programs don't handle -EACCES very well so it should
3163 * be mapped to -EPERM instead.
3164 */
3165 if (status == -EACCES)
3166 status = -EPERM;
801a16dc
BS		 3167 return status;
3168}
3169
2ed4b95b
CL		 3170static int nfs4_do_find_root_sec(struct nfs_server *server,
3171 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3172{
3173 int mv = server->nfs_client->cl_minorversion;
3174 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3175}
3176
3177/**
3178 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3179 * @server: initialized nfs_server handle
3180 * @fhandle: we fill in the pseudo-fs root file handle
3181 * @info: we fill in an FSINFO struct
5e6b1990 3182 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3183 *
3184 * Returns zero on success, or a negative errno.
801a16dc 3185 */
3028eb2b 3186int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3187 struct nfs_fsinfo *info,
3188 bool auth_probe)
801a16dc 3189{
c7757074 3190 int status = 0;
2ed4b95b 3191
c7757074 3192 if (!auth_probe)
5e6b1990 3193 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3194
3195 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3196 status = nfs4_do_find_root_sec(server, fhandle, info);
3197
1da177e4
LT		 3198 if (status == 0)
3199 status = nfs4_server_capabilities(server, fhandle);
3200 if (status == 0)
3201 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3202
c12e87f4 3203 return nfs4_map_errors(status);
1da177e4
LT		 3204}
3205
bae36241
BS		 3206static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3207 struct nfs_fsinfo *info)
3208{
3209 int error;
3210 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3211 struct nfs4_label *label = NULL;
bae36241
BS		 3212
3213 error = nfs4_server_capabilities(server, mntfh);
3214 if (error < 0) {
3215 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3216 return error;
3217 }
3218
14c43f76
DQ		 3219 label = nfs4_label_alloc(server, GFP_KERNEL);
3220 if (IS_ERR(label))
3221 return PTR_ERR(label);
3222
1775fd3e 3223 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3224 if (error < 0) {
3225 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3226 goto err_free_label;
bae36241
BS		 3227 }
3228
3229 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3230 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3231 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3232
14c43f76
DQ		 3233err_free_label:
3234 nfs4_label_free(label);
3235
bae36241
BS		 3236 return error;
3237}
3238
6b97fd3d
MN		 3239/*
3240 * Get locations and (maybe) other attributes of a referral.
3241 * Note that we'll actually follow the referral later when
3242 * we detect fsid mismatch in inode revalidation
3243 */
f05d147f
BS		 3244static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3245 const struct qstr *name, struct nfs_fattr *fattr,
3246 struct nfs_fh *fhandle)
6b97fd3d
MN		 3247{
3248 int status = -ENOMEM;
3249 struct page *page = NULL;
3250 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3251
3252 page = alloc_page(GFP_KERNEL);
3253 if (page == NULL)
3254 goto out;
3255 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3256 if (locations == NULL)
3257 goto out;
3258
f05d147f 3259 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3260 if (status != 0)
3261 goto out;
519ae255
CL		 3262
3263 /*
3264 * If the fsid didn't change, this is a migration event, not a
3265 * referral. Cause us to drop into the exception handler, which
3266 * will kick off migration recovery.
3267 */
6b97fd3d 3268 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3269 dprintk("%s: server did not return a different fsid for"
3270 " a referral at %s\n", __func__, name->name);
519ae255 3271 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3272 goto out;
3273 }
533eb461
AA		 3274 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3275 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3276
533eb461 3277 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3278 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3279 memset(fhandle, 0, sizeof(struct nfs_fh));
3280out:
3281 if (page)
3282 __free_page(page);
5d7ca35a 3283 kfree(locations);
6b97fd3d
MN		 3284 return status;
3285}
3286
1775fd3e
DQ		 3287static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3288 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3289{
3290 struct nfs4_getattr_arg args = {
3291 .fh = fhandle,
3292 .bitmask = server->attr_bitmask,
3293 };
3294 struct nfs4_getattr_res res = {
3295 .fattr = fattr,
1775fd3e 3296 .label = label,
1da177e4
LT		 3297 .server = server,
3298 };
3299 struct rpc_message msg = {
3300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3301 .rpc_argp = &args,
3302 .rpc_resp = &res,
3303 };
aa9c2669
DQ		 3304
3305 args.bitmask = nfs4_bitmask(server, label);
3306
0e574af1 3307 nfs_fattr_init(fattr);
7c513058 3308 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3309}
3310
1775fd3e
DQ		 3311static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3312 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3313{
3314 struct nfs4_exception exception = { };
3315 int err;
3316 do {
b5f875a9
TM		 3317 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3318 trace_nfs4_getattr(server, fhandle, fattr, err);
3319 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3320 &exception);
3321 } while (exception.retry);
3322 return err;
3323}
3324
3325/*
3326 * The file is not closed if it is opened due to the a request to change
3327 * the size of the file. The open call will not be needed once the
3328 * VFS layer lookup-intents are implemented.
3329 *
3330 * Close is called when the inode is destroyed.
3331 * If we haven't opened the file for O_WRONLY, we
3332 * need to in the size_change case to obtain a stateid.
3333 *
3334 * Got race?
3335 * Because OPEN is always done by name in nfsv4, it is
3336 * possible that we opened a different file by the same
3337 * name. We can recognize this race condition, but we
3338 * can't do anything about it besides returning an error.
3339 *
3340 * This will be fixed with VFS changes (lookup-intent).
3341 */
3342static int
3343nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3344 struct iattr *sattr)
3345{
2b0143b5 3346 struct inode *inode = d_inode(dentry);
659bfcd6 3347 struct rpc_cred *cred = NULL;
d530838b 3348 struct nfs4_state *state = NULL;
14c43f76 3349 struct nfs4_label *label = NULL;
1da177e4
LT		 3350 int status;
3351
88ac815c
PT		 3352 if (pnfs_ld_layoutret_on_setattr(inode) &&
3353 sattr->ia_valid & ATTR_SIZE &&
3354 sattr->ia_size < i_size_read(inode))
24028672 3355 pnfs_commit_and_return_layout(inode);
8a1636c4 3356
0e574af1 3357 nfs_fattr_init(fattr);
1da177e4 3358
2669940d
AA		 3359 /* Deal with open(O_TRUNC) */
3360 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3361 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3362
3363 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3364 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3365 return 0;
3366
d530838b 3367 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3368 if (sattr->ia_valid & ATTR_FILE) {
3369 struct nfs_open_context *ctx;
3370
3371 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3372 if (ctx) {
3373 cred = ctx->cred;
3374 state = ctx->state;
3375 }
659bfcd6 3376 }
08e9eac4 3377
14c43f76
DQ		 3378 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3379 if (IS_ERR(label))
3380 return PTR_ERR(label);
3381
3382 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3383 if (status == 0) {
f044636d 3384 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3385 nfs_setsecurity(inode, fattr, label);
3386 }
14c43f76 3387 nfs4_label_free(label);
1da177e4
LT		 3388 return status;
3389}
3390
0c2e53f1
TM		 3391static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3392 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3393 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3394{
0c2e53f1 3395 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3396 int status;
3397 struct nfs4_lookup_arg args = {
3398 .bitmask = server->attr_bitmask,
0c2e53f1 3399 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3400 .name = name,
3401 };
3402 struct nfs4_lookup_res res = {
3403 .server = server,
3404 .fattr = fattr,
aa9c2669 3405 .label = label,
2b3de441
DH		 3406 .fh = fhandle,
3407 };
3408 struct rpc_message msg = {
3409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3410 .rpc_argp = &args,
3411 .rpc_resp = &res,
3412 };
3413
aa9c2669
DQ		 3414 args.bitmask = nfs4_bitmask(server, label);
3415
2b3de441
DH		 3416 nfs_fattr_init(fattr);
3417
1da177e4 3418 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3419 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3420 dprintk("NFS reply lookup: %d\n", status);
3421 return status;
3422}
3423
72de53ec 3424static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3425{
7ebb9315 3426 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3427 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3428 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3429 fattr->nlink = 2;
3430}
3431
72de53ec
BS		 3432static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3433 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3434 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3435{
3436 struct nfs4_exception exception = { };
72de53ec 3437 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3438 int err;
3439 do {
1775fd3e 3440 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3441 trace_nfs4_lookup(dir, name, err);
72de53ec 3442 switch (err) {
08ef7bd3 3443 case -NFS4ERR_BADNAME:
72de53ec
BS		 3444 err = -ENOENT;
3445 goto out;
0c2e53f1 3446 case -NFS4ERR_MOVED:
f05d147f 3447 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3448 if (err == -NFS4ERR_MOVED)
3449 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3450 goto out;
0c2e53f1 3451 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3452 err = -EPERM;
3453 if (client != *clnt)
3454 goto out;
66b06860 3455 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3456 if (IS_ERR(client))
3457 return PTR_ERR(client);
3458
3459 exception.retry = 1;
3460 break;
3461 default:
3462 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3463 }
1da177e4 3464 } while (exception.retry);
72de53ec
BS		 3465
3466out:
3467 if (err == 0)
3468 *clnt = client;
3469 else if (client != *clnt)
3470 rpc_shutdown_client(client);
3471
1da177e4
LT		 3472 return err;
3473}
3474
80a16b21 3475static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3476 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3477 struct nfs4_label *label)
72de53ec
BS		 3478{
3479 int status;
3480 struct rpc_clnt *client = NFS_CLIENT(dir);
3481
1775fd3e 3482 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3483 if (client != NFS_CLIENT(dir)) {
3484 rpc_shutdown_client(client);
3485 nfs_fixup_secinfo_attributes(fattr);
3486 }
3487 return status;
3488}
3489
f05d147f
BS		 3490struct rpc_clnt *
3491nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3492 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3493{
b72888cb 3494 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3495 int status;
f05d147f 3496
1775fd3e 3497 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3498 if (status < 0)
f05d147f 3499 return ERR_PTR(status);
b72888cb 3500 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3501}
3502
1da177e4
LT		 3503static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3504{
76b32999 3505 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3506 struct nfs4_accessargs args = {
3507 .fh = NFS_FH(inode),
a4980e78 3508 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3509 };
3510 struct nfs4_accessres res = {
3511 .server = server,
1da177e4 3512 };
1da177e4
LT		 3513 struct rpc_message msg = {
3514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3515 .rpc_argp = &args,
3516 .rpc_resp = &res,
3517 .rpc_cred = entry->cred,
3518 };
3519 int mode = entry->mask;
aa9c2669 3520 int status = 0;
1da177e4
LT		 3521
3522 /*
3523 * Determine which access bits we want to ask for...
3524 */
3525 if (mode & MAY_READ)
3526 args.access |= NFS4_ACCESS_READ;
3527 if (S_ISDIR(inode->i_mode)) {
3528 if (mode & MAY_WRITE)
3529 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3530 if (mode & MAY_EXEC)
3531 args.access |= NFS4_ACCESS_LOOKUP;
3532 } else {
3533 if (mode & MAY_WRITE)
3534 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3535 if (mode & MAY_EXEC)
3536 args.access |= NFS4_ACCESS_EXECUTE;
3537 }
c407d41a
TM		 3538
3539 res.fattr = nfs_alloc_fattr();
3540 if (res.fattr == NULL)
3541 return -ENOMEM;
3542
7c513058 3543 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3544 if (!status) {
6168f62c 3545 nfs_access_set_mask(entry, res.access);
c407d41a 3546 nfs_refresh_inode(inode, res.fattr);
1da177e4 3547 }
c407d41a 3548 nfs_free_fattr(res.fattr);
1da177e4
LT		 3549 return status;
3550}
3551
3552static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3553{
3554 struct nfs4_exception exception = { };
3555 int err;
3556 do {
c1578b76
TM		 3557 err = _nfs4_proc_access(inode, entry);
3558 trace_nfs4_access(inode, err);
3559 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3560 &exception);
3561 } while (exception.retry);
3562 return err;
3563}
3564
3565/*
3566 * TODO: For the time being, we don't try to get any attributes
3567 * along with any of the zero-copy operations READ, READDIR,
3568 * READLINK, WRITE.
3569 *
3570 * In the case of the first three, we want to put the GETATTR
3571 * after the read-type operation -- this is because it is hard
3572 * to predict the length of a GETATTR response in v4, and thus
3573 * align the READ data correctly. This means that the GETATTR
3574 * may end up partially falling into the page cache, and we should
3575 * shift it into the 'tail' of the xdr_buf before processing.
3576 * To do this efficiently, we need to know the total length
3577 * of data received, which doesn't seem to be available outside
3578 * of the RPC layer.
3579 *
3580 * In the case of WRITE, we also want to put the GETATTR after
3581 * the operation -- in this case because we want to make sure
140150db 3582 * we get the post-operation mtime and size.
1da177e4
LT		 3583 *
3584 * Both of these changes to the XDR layer would in fact be quite
3585 * minor, but I decided to leave them for a subsequent patch.
3586 */
3587static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3588 unsigned int pgbase, unsigned int pglen)
3589{
3590 struct nfs4_readlink args = {
3591 .fh = NFS_FH(inode),
3592 .pgbase = pgbase,
3593 .pglen = pglen,
3594 .pages = &page,
3595 };
f50c7000 3596 struct nfs4_readlink_res res;
1da177e4
LT		 3597 struct rpc_message msg = {
3598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3599 .rpc_argp = &args,
f50c7000 3600 .rpc_resp = &res,
1da177e4
LT		 3601 };
3602
7c513058 3603 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3604}
3605
3606static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3607 unsigned int pgbase, unsigned int pglen)
3608{
3609 struct nfs4_exception exception = { };
3610 int err;
3611 do {
c1578b76
TM		 3612 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3613 trace_nfs4_readlink(inode, err);
3614 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3615 &exception);
3616 } while (exception.retry);
3617 return err;
3618}
3619
1da177e4 3620/*
8867fe58 3621 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3622 */
1da177e4
LT		 3623static int
3624nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3625 int flags)
1da177e4 3626{
aa9c2669 3627 struct nfs4_label l, *ilabel = NULL;
8867fe58 3628 struct nfs_open_context *ctx;
1da177e4 3629 struct nfs4_state *state;
1da177e4
LT		 3630 int status = 0;
3631
8867fe58
MS		 3632 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3633 if (IS_ERR(ctx))
3634 return PTR_ERR(ctx);
3635
aa9c2669
DQ		 3636 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3637
a8a5da99 3638 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3639 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3640 if (IS_ERR(state)) {
3641 status = PTR_ERR(state);
c0204fd2 3642 goto out;
1da177e4 3643 }
1da177e4 3644out:
aa9c2669 3645 nfs4_label_release_security(ilabel);
8867fe58 3646 put_nfs_open_context(ctx);
1da177e4
LT		 3647 return status;
3648}
3649
3650static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3651{
16e42959 3652 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3653 struct nfs_removeargs args = {
1da177e4 3654 .fh = NFS_FH(dir),
26fe5750 3655 .name = *name,
16e42959 3656 };
4fdc17b2 3657 struct nfs_removeres res = {
16e42959 3658 .server = server,
1da177e4 3659 };
1da177e4 3660 struct rpc_message msg = {
4fdc17b2
TM		 3661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3662 .rpc_argp = &args,
3663 .rpc_resp = &res,
1da177e4 3664 };
778d2817 3665 int status;
1da177e4 3666
7c513058 3667 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3668 if (status == 0)
16e42959 3669 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3670 return status;
3671}
3672
3673static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3674{
3675 struct nfs4_exception exception = { };
3676 int err;
3677 do {
078ea3df
TM		 3678 err = _nfs4_proc_remove(dir, name);
3679 trace_nfs4_remove(dir, name, err);
3680 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3681 &exception);
3682 } while (exception.retry);
3683 return err;
3684}
3685
e4eff1a6 3686static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3687{
e4eff1a6
TM		 3688 struct nfs_server *server = NFS_SERVER(dir);
3689 struct nfs_removeargs *args = msg->rpc_argp;
3690 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3691
e4eff1a6 3692 res->server = server;
1da177e4 3693 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3694 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3695
3696 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3697}
3698
34e137cc
BS		 3699static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3700{
d9afbd1b
TM		 3701 nfs4_setup_sequence(NFS_SERVER(data->dir),
3702 &data->args.seq_args,
3703 &data->res.seq_res,
3704 task);
1da177e4
LT		 3705}
3706
e4eff1a6 3707static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3708{
078ea3df
TM		 3709 struct nfs_unlinkdata *data = task->tk_calldata;
3710 struct nfs_removeres *res = &data->res;
e4eff1a6 3711
14516c3a
TM		 3712 if (!nfs4_sequence_done(task, &res->seq_res))
3713 return 0;
8478eaa1
N		 3714 if (nfs4_async_handle_error(task, res->server, NULL,
3715 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3716 return 0;
3717 update_changeattr(dir, &res->cinfo);
e4eff1a6 3718 return 1;
1da177e4
LT		 3719}
3720
d3d4152a
JL		 3721static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3722{
3723 struct nfs_server *server = NFS_SERVER(dir);
3724 struct nfs_renameargs *arg = msg->rpc_argp;
3725 struct nfs_renameres *res = msg->rpc_resp;
3726
3727 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3728 res->server = server;
a9c92d6b 3729 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3730}
3731
c6bfa1a1
BS		 3732static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3733{
d9afbd1b
TM		 3734 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3735 &data->args.seq_args,
3736 &data->res.seq_res,
3737 task);
d3d4152a
JL		 3738}
3739
3740static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3741 struct inode *new_dir)
3742{
fbc6f7c2
TM		 3743 struct nfs_renamedata *data = task->tk_calldata;
3744 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3745
3746 if (!nfs4_sequence_done(task, &res->seq_res))
3747 return 0;
8478eaa1 3748 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3749 return 0;
3750
3751 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3752 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3753 return 1;
3754}
3755
1da177e4
LT		 3756static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3757{
91ba2eee 3758 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3759 struct nfs4_link_arg arg = {
3760 .fh = NFS_FH(inode),
3761 .dir_fh = NFS_FH(dir),
3762 .name = name,
91ba2eee
TM		 3763 .bitmask = server->attr_bitmask,
3764 };
91ba2eee
TM		 3765 struct nfs4_link_res res = {
3766 .server = server,
1775fd3e 3767 .label = NULL,
1da177e4 3768 };
1da177e4
LT		 3769 struct rpc_message msg = {
3770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3771 .rpc_argp = &arg,
91ba2eee 3772 .rpc_resp = &res,
1da177e4 3773 };
136f2627
TM		 3774 int status = -ENOMEM;
3775
3776 res.fattr = nfs_alloc_fattr();
778d2817 3777 if (res.fattr == NULL)
136f2627 3778 goto out;
1da177e4 3779
14c43f76
DQ		 3780 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3781 if (IS_ERR(res.label)) {
3782 status = PTR_ERR(res.label);
3783 goto out;
3784 }
aa9c2669 3785 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3786
7c513058 3787 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3788 if (!status) {
3789 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3790 status = nfs_post_op_update_inode(inode, res.fattr);
3791 if (!status)
3792 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3793 }
14c43f76
DQ		 3794
3795
3796 nfs4_label_free(res.label);
3797
136f2627 3798out:
136f2627 3799 nfs_free_fattr(res.fattr);
1da177e4
LT		 3800 return status;
3801}
3802
3803static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3804{
3805 struct nfs4_exception exception = { };
3806 int err;
3807 do {
3808 err = nfs4_handle_exception(NFS_SERVER(inode),
3809 _nfs4_proc_link(inode, dir, name),
3810 &exception);
3811 } while (exception.retry);
3812 return err;
3813}
3814
57dc9a57
TM		 3815struct nfs4_createdata {
3816 struct rpc_message msg;
3817 struct nfs4_create_arg arg;
3818 struct nfs4_create_res res;
3819 struct nfs_fh fh;
3820 struct nfs_fattr fattr;
1775fd3e 3821 struct nfs4_label *label;
57dc9a57
TM		 3822};
3823
3824static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3825 struct qstr *name, struct iattr *sattr, u32 ftype)
3826{
3827 struct nfs4_createdata *data;
3828
3829 data = kzalloc(sizeof(*data), GFP_KERNEL);
3830 if (data != NULL) {
3831 struct nfs_server *server = NFS_SERVER(dir);
3832
14c43f76
DQ		 3833 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3834 if (IS_ERR(data->label))
3835 goto out_free;
3836
57dc9a57
TM		 3837 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3838 data->msg.rpc_argp = &data->arg;
3839 data->msg.rpc_resp = &data->res;
3840 data->arg.dir_fh = NFS_FH(dir);
3841 data->arg.server = server;
3842 data->arg.name = name;
3843 data->arg.attrs = sattr;
3844 data->arg.ftype = ftype;
aa9c2669 3845 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3846 data->res.server = server;
3847 data->res.fh = &data->fh;
3848 data->res.fattr = &data->fattr;
1775fd3e 3849 data->res.label = data->label;
57dc9a57 3850 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3851 }
3852 return data;
14c43f76
DQ		 3853out_free:
3854 kfree(data);
3855 return NULL;
57dc9a57
TM		 3856}
3857
3858static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3859{
7c513058 3860 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3861 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3862 if (status == 0) {
3863 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3864 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3865 }
3866 return status;
3867}
3868
3869static void nfs4_free_createdata(struct nfs4_createdata *data)
3870{
14c43f76 3871 nfs4_label_free(data->label);
57dc9a57
TM		 3872 kfree(data);
3873}
3874
4f390c15 3875static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3876 struct page *page, unsigned int len, struct iattr *sattr,
3877 struct nfs4_label *label)
1da177e4 3878{
57dc9a57
TM		 3879 struct nfs4_createdata *data;
3880 int status = -ENAMETOOLONG;
1da177e4 3881
94a6d753 3882 if (len > NFS4_MAXPATHLEN)
57dc9a57 3883 goto out;
4f390c15 3884
57dc9a57
TM		 3885 status = -ENOMEM;
3886 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3887 if (data == NULL)
3888 goto out;
3889
3890 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3891 data->arg.u.symlink.pages = &page;
3892 data->arg.u.symlink.len = len;
1775fd3e 3893 data->arg.label = label;
1da177e4 3894
57dc9a57
TM		 3895 status = nfs4_do_create(dir, dentry, data);
3896
3897 nfs4_free_createdata(data);
3898out:
1da177e4
LT		 3899 return status;
3900}
3901
4f390c15 3902static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3903 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3904{
3905 struct nfs4_exception exception = { };
aa9c2669 3906 struct nfs4_label l, *label = NULL;
1da177e4 3907 int err;
aa9c2669
DQ		 3908
3909 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3910
1da177e4 3911 do {
078ea3df
TM		 3912 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3913 trace_nfs4_symlink(dir, &dentry->d_name, err);
3914 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3915 &exception);
3916 } while (exception.retry);
aa9c2669
DQ		 3917
3918 nfs4_label_release_security(label);
1da177e4
LT		 3919 return err;
3920}
3921
3922static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3923 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3924{
57dc9a57
TM		 3925 struct nfs4_createdata *data;
3926 int status = -ENOMEM;
1da177e4 3927
57dc9a57
TM		 3928 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3929 if (data == NULL)
3930 goto out;
3931
1775fd3e 3932 data->arg.label = label;
57dc9a57
TM		 3933 status = nfs4_do_create(dir, dentry, data);
3934
3935 nfs4_free_createdata(data);
3936out:
1da177e4
LT		 3937 return status;
3938}
3939
3940static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3941 struct iattr *sattr)
3942{
3943 struct nfs4_exception exception = { };
aa9c2669 3944 struct nfs4_label l, *label = NULL;
1da177e4 3945 int err;
a8a5da99 3946
aa9c2669
DQ		 3947 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3948
a8a5da99 3949 sattr->ia_mode &= ~current_umask();
1da177e4 3950 do {
078ea3df
TM		 3951 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3952 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3953 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3954 &exception);
3955 } while (exception.retry);
aa9c2669
DQ		 3956 nfs4_label_release_security(label);
3957
1da177e4
LT		 3958 return err;
3959}
3960
3961static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3962 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3963{
2b0143b5 3964 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3965 struct nfs4_readdir_arg args = {
3966 .fh = NFS_FH(dir),
56e4ebf8 3967 .pages = pages,
1da177e4
LT		 3968 .pgbase = 0,
3969 .count = count,
2b0143b5 3970 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3971 .plus = plus,
1da177e4
LT		 3972 };
3973 struct nfs4_readdir_res res;
3974 struct rpc_message msg = {
3975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3976 .rpc_argp = &args,
3977 .rpc_resp = &res,
3978 .rpc_cred = cred,
3979 };
3980 int status;
3981
6de1472f
AV		 3982 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3983 dentry,
eadf4598 3984 (unsigned long long)cookie);
c3f52af3 3985 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3986 res.pgbase = args.pgbase;
7c513058 3987 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3988 if (status >= 0) {
c3f52af3 3989 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3990 status += args.pgbase;
3991 }
c4812998
TM		 3992
3993 nfs_invalidate_atime(dir);
3994
3110ff80 3995 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3996 return status;
3997}
3998
3999static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4000 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4001{
4002 struct nfs4_exception exception = { };
4003 int err;
4004 do {
c1578b76
TM		 4005 err = _nfs4_proc_readdir(dentry, cred, cookie,
4006 pages, count, plus);
2b0143b5
DH		 4007 trace_nfs4_readdir(d_inode(dentry), err);
4008 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4009 &exception);
4010 } while (exception.retry);
4011 return err;
4012}
4013
4014static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4015 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4016{
57dc9a57
TM		 4017 struct nfs4_createdata *data;
4018 int mode = sattr->ia_mode;
4019 int status = -ENOMEM;
1da177e4 4020
57dc9a57
TM		 4021 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4022 if (data == NULL)
4023 goto out;
4024
1da177e4 4025 if (S_ISFIFO(mode))
57dc9a57 4026 data->arg.ftype = NF4FIFO;
1da177e4 4027 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4028 data->arg.ftype = NF4BLK;
4029 data->arg.u.device.specdata1 = MAJOR(rdev);
4030 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4031 }
4032 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4033 data->arg.ftype = NF4CHR;
4034 data->arg.u.device.specdata1 = MAJOR(rdev);
4035 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4036 } else if (!S_ISSOCK(mode)) {
4037 status = -EINVAL;
4038 goto out_free;
1da177e4 4039 }
1775fd3e 4040
aa9c2669 4041 data->arg.label = label;
57dc9a57 4042 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4043out_free:
57dc9a57
TM		 4044 nfs4_free_createdata(data);
4045out:
1da177e4
LT		 4046 return status;
4047}
4048
4049static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4050 struct iattr *sattr, dev_t rdev)
4051{
4052 struct nfs4_exception exception = { };
aa9c2669 4053 struct nfs4_label l, *label = NULL;
1da177e4 4054 int err;
a8a5da99 4055
aa9c2669
DQ		 4056 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4057
a8a5da99 4058 sattr->ia_mode &= ~current_umask();
1da177e4 4059 do {
078ea3df
TM		 4060 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4061 trace_nfs4_mknod(dir, &dentry->d_name, err);
4062 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4063 &exception);
4064 } while (exception.retry);
aa9c2669
DQ		 4065
4066 nfs4_label_release_security(label);
4067
1da177e4
LT		 4068 return err;
4069}
4070
4071static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4072 struct nfs_fsstat *fsstat)
4073{
4074 struct nfs4_statfs_arg args = {
4075 .fh = fhandle,
4076 .bitmask = server->attr_bitmask,
4077 };
24ad148a
BH		 4078 struct nfs4_statfs_res res = {
4079 .fsstat = fsstat,
4080 };
1da177e4
LT		 4081 struct rpc_message msg = {
4082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4083 .rpc_argp = &args,
24ad148a 4084 .rpc_resp = &res,
1da177e4
LT		 4085 };
4086
0e574af1 4087 nfs_fattr_init(fsstat->fattr);
7c513058 4088 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4089}
4090
4091static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4092{
4093 struct nfs4_exception exception = { };
4094 int err;
4095 do {
4096 err = nfs4_handle_exception(server,
4097 _nfs4_proc_statfs(server, fhandle, fsstat),
4098 &exception);
4099 } while (exception.retry);
4100 return err;
4101}
4102
4103static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4104 struct nfs_fsinfo *fsinfo)
4105{
4106 struct nfs4_fsinfo_arg args = {
4107 .fh = fhandle,
4108 .bitmask = server->attr_bitmask,
4109 };
3dda5e43
BH		 4110 struct nfs4_fsinfo_res res = {
4111 .fsinfo = fsinfo,
4112 };
1da177e4
LT		 4113 struct rpc_message msg = {
4114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4115 .rpc_argp = &args,
3dda5e43 4116 .rpc_resp = &res,
1da177e4
LT		 4117 };
4118
7c513058 4119 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4120}
4121
4122static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4123{
4124 struct nfs4_exception exception = { };
83ca7f5a 4125 unsigned long now = jiffies;
1da177e4
LT		 4126 int err;
4127
4128 do {
83ca7f5a 4129 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4130 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4131 if (err == 0) {
4132 struct nfs_client *clp = server->nfs_client;
4133
4134 spin_lock(&clp->cl_lock);
4135 clp->cl_lease_time = fsinfo->lease_time * HZ;
4136 clp->cl_last_renewal = now;
4137 spin_unlock(&clp->cl_lock);
4138 break;
4139 }
4140 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4141 } while (exception.retry);
4142 return err;
4143}
4144
4145static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4146{
e38eb650
BS		 4147 int error;
4148
0e574af1 4149 nfs_fattr_init(fsinfo->fattr);
e38eb650 4150 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4151 if (error == 0) {
4152 /* block layout checks this! */
4153 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4154 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4155 }
e38eb650
BS		 4156
4157 return error;
1da177e4
LT		 4158}
4159
4160static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4161 struct nfs_pathconf *pathconf)
4162{
4163 struct nfs4_pathconf_arg args = {
4164 .fh = fhandle,
4165 .bitmask = server->attr_bitmask,
4166 };
d45b2989
BH		 4167 struct nfs4_pathconf_res res = {
4168 .pathconf = pathconf,
4169 };
1da177e4
LT		 4170 struct rpc_message msg = {
4171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4172 .rpc_argp = &args,
d45b2989 4173 .rpc_resp = &res,
1da177e4
LT		 4174 };
4175
4176 /* None of the pathconf attributes are mandatory to implement */
4177 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4178 memset(pathconf, 0, sizeof(*pathconf));
4179 return 0;
4180 }
4181
0e574af1 4182 nfs_fattr_init(pathconf->fattr);
7c513058 4183 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4184}
4185
4186static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4187 struct nfs_pathconf *pathconf)
4188{
4189 struct nfs4_exception exception = { };
4190 int err;
4191
4192 do {
4193 err = nfs4_handle_exception(server,
4194 _nfs4_proc_pathconf(server, fhandle, pathconf),
4195 &exception);
4196 } while (exception.retry);
4197 return err;
4198}
4199
5521abfd 4200int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4201 const struct nfs_open_context *ctx,
4202 const struct nfs_lock_context *l_ctx,
4203 fmode_t fmode)
4204{
4205 const struct nfs_lockowner *lockowner = NULL;
4206
4207 if (l_ctx != NULL)
4208 lockowner = &l_ctx->lockowner;
5521abfd 4209 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4210}
4211EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4212
5521abfd
TM		 4213static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4214 const struct nfs_open_context *ctx,
4215 const struct nfs_lock_context *l_ctx,
4216 fmode_t fmode)
4217{
4218 nfs4_stateid current_stateid;
4219
e1253be0
TM		 4220 /* If the current stateid represents a lost lock, then exit */
4221 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4222 return true;
5521abfd
TM		 4223 return nfs4_stateid_match(stateid, &current_stateid);
4224}
4225
4226static bool nfs4_error_stateid_expired(int err)
4227{
4228 switch (err) {
4229 case -NFS4ERR_DELEG_REVOKED:
4230 case -NFS4ERR_ADMIN_REVOKED:
4231 case -NFS4ERR_BAD_STATEID:
4232 case -NFS4ERR_STALE_STATEID:
4233 case -NFS4ERR_OLD_STATEID:
4234 case -NFS4ERR_OPENMODE:
4235 case -NFS4ERR_EXPIRED:
4236 return true;
4237 }
4238 return false;
4239}
4240
d45f60c6 4241void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4242{
d45f60c6 4243 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4244}
4245
d45f60c6 4246static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4247{
d45f60c6 4248 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4249
d45f60c6
WAA		 4250 trace_nfs4_read(hdr, task->tk_status);
4251 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4252 hdr->args.context->state,
4253 NULL) == -EAGAIN) {
d00c5d43 4254 rpc_restart_call_prepare(task);
ec06c096 4255 return -EAGAIN;
1da177e4 4256 }
8850df99 4257
d45f60c6 4258 __nfs4_read_done_cb(hdr);
1da177e4 4259 if (task->tk_status > 0)
d45f60c6 4260 renew_lease(server, hdr->timestamp);
ec06c096 4261 return 0;
1da177e4
LT		 4262}
4263
5521abfd 4264static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4265 struct nfs_pgio_args *args)
5521abfd
TM		 4266{
4267
4268 if (!nfs4_error_stateid_expired(task->tk_status) ||
4269 nfs4_stateid_is_current(&args->stateid,
4270 args->context,
4271 args->lock_context,
4272 FMODE_READ))
4273 return false;
4274 rpc_restart_call_prepare(task);
4275 return true;
4276}
4277
d45f60c6 4278static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4279{
4280
4281 dprintk("--> %s\n", __func__);
4282
d45f60c6 4283 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4284 return -EAGAIN;
d45f60c6 4285 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4286 return -EAGAIN;
d45f60c6
WAA		 4287 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4288 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4289}
4290
d45f60c6
WAA		 4291static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4292 struct rpc_message *msg)
1da177e4 4293{
d45f60c6
WAA		 4294 hdr->timestamp = jiffies;
4295 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4296 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4297 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4298}
4299
d45f60c6
WAA		 4300static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4301 struct nfs_pgio_header *hdr)
ea7c3303 4302{
d45f60c6
WAA		 4303 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4304 &hdr->args.seq_args,
4305 &hdr->res.seq_res,
9b206149 4306 task))
ef1820f9 4307 return 0;
d45f60c6
WAA		 4308 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4309 hdr->args.lock_context,
4310 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4311 return -EIO;
d45f60c6 4312 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4313 return -EIO;
4314 return 0;
1da177e4
LT		 4315}
4316
d45f60c6
WAA		 4317static int nfs4_write_done_cb(struct rpc_task *task,
4318 struct nfs_pgio_header *hdr)
1da177e4 4319{
d45f60c6 4320 struct inode *inode = hdr->inode;
8478eaa1 4321
d45f60c6
WAA		 4322 trace_nfs4_write(hdr, task->tk_status);
4323 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4324 hdr->args.context->state,
4325 NULL) == -EAGAIN) {
d00c5d43 4326 rpc_restart_call_prepare(task);
788e7a89 4327 return -EAGAIN;
1da177e4 4328 }
4f9838c7 4329 if (task->tk_status >= 0) {
d45f60c6 4330 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4331 nfs_writeback_update_inode(hdr);
4f9838c7 4332 }
788e7a89 4333 return 0;
1da177e4
LT		 4334}
4335
5521abfd 4336static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4337 struct nfs_pgio_args *args)
5521abfd
TM		 4338{
4339
4340 if (!nfs4_error_stateid_expired(task->tk_status) ||
4341 nfs4_stateid_is_current(&args->stateid,
4342 args->context,
4343 args->lock_context,
4344 FMODE_WRITE))
4345 return false;
4346 rpc_restart_call_prepare(task);
4347 return true;
4348}
4349
d45f60c6 4350static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4351{
d45f60c6 4352 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4353 return -EAGAIN;
d45f60c6 4354 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4355 return -EAGAIN;
d45f60c6
WAA		 4356 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4357 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4358}
4359
5a37f851 4360static
d45f60c6 4361bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4362{
5a37f851 4363 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4364 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4365 return false;
4366 /* Otherwise, request attributes if and only if we don't hold
4367 * a delegation
4368 */
011e2a7f 4369 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4370}
a69aef14 4371
d45f60c6
WAA		 4372static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4373 struct rpc_message *msg)
1da177e4 4374{
d45f60c6 4375 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4376
d45f60c6
WAA		 4377 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4378 hdr->args.bitmask = NULL;
4379 hdr->res.fattr = NULL;
7ffd1064 4380 } else
d45f60c6 4381 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4382
d45f60c6
WAA		 4383 if (!hdr->pgio_done_cb)
4384 hdr->pgio_done_cb = nfs4_write_done_cb;
4385 hdr->res.server = server;
4386 hdr->timestamp = jiffies;
1da177e4 4387
bdc7f021 4388 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4389 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4390}
4391
0b7c0153 4392static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4393{
d9afbd1b
TM		 4394 nfs4_setup_sequence(NFS_SERVER(data->inode),
4395 &data->args.seq_args,
4396 &data->res.seq_res,
4397 task);
1da177e4
LT		 4398}
4399
0b7c0153 4400static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4401{
1da177e4 4402 struct inode *inode = data->inode;
14516c3a 4403
cc668ab3 4404 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4405 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4406 NULL, NULL) == -EAGAIN) {
d00c5d43 4407 rpc_restart_call_prepare(task);
788e7a89 4408 return -EAGAIN;
1da177e4 4409 }
788e7a89 4410 return 0;
1da177e4
LT		 4411}
4412
0b7c0153 4413static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4414{
4415 if (!nfs4_sequence_done(task, &data->res.seq_res))
4416 return -EAGAIN;
0b7c0153 4417 return data->commit_done_cb(task, data);
5f452431
FI		 4418}
4419
0b7c0153 4420static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4421{
788e7a89 4422 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4423
0b7c0153
FI		 4424 if (data->commit_done_cb == NULL)
4425 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4426 data->res.server = server;
bdc7f021 4427 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4428 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4429}
4430
9bc4e3ca
CL		 4431struct nfs4_renewdata {
4432 struct nfs_client *client;
4433 unsigned long timestamp;
4434};
4435
1da177e4
LT		 4436/*
4437 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4438 * standalone procedure for queueing an asynchronous RENEW.
4439 */
9bc4e3ca 4440static void nfs4_renew_release(void *calldata)
dc96aef9 4441{
9bc4e3ca
CL		 4442 struct nfs4_renewdata *data = calldata;
4443 struct nfs_client *clp = data->client;
dc96aef9 4444
0851de06
AB		 4445 if (atomic_read(&clp->cl_count) > 1)
4446 nfs4_schedule_state_renewal(clp);
4447 nfs_put_client(clp);
9bc4e3ca 4448 kfree(data);
dc96aef9
AB		 4449}
4450
9bc4e3ca 4451static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4452{
9bc4e3ca
CL		 4453 struct nfs4_renewdata *data = calldata;
4454 struct nfs_client *clp = data->client;
4455 unsigned long timestamp = data->timestamp;
1da177e4 4456
c6d01c6f 4457 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4458 switch (task->tk_status) {
4459 case 0:
4460 break;
4461 case -NFS4ERR_LEASE_MOVED:
4462 nfs4_schedule_lease_moved_recovery(clp);
4463 break;
4464 default:
95baa25c 4465 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4466 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4467 return;
4468 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4469 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4470 return;
4471 }
4472 nfs4_schedule_path_down_recovery(clp);
1da177e4 4473 }
452e9352 4474 do_renew_lease(clp, timestamp);
1da177e4
LT		 4475}
4476
963d8fe5
TM		 4477static const struct rpc_call_ops nfs4_renew_ops = {
4478 .rpc_call_done = nfs4_renew_done,
dc96aef9 4479 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4480};
4481
2f60ea6b 4482static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4483{
4484 struct rpc_message msg = {
4485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4486 .rpc_argp = clp,
b4454fe1 4487 .rpc_cred = cred,
1da177e4 4488 };
9bc4e3ca 4489 struct nfs4_renewdata *data;
1da177e4 4490
2f60ea6b
TM		 4491 if (renew_flags == 0)
4492 return 0;
0851de06
AB		 4493 if (!atomic_inc_not_zero(&clp->cl_count))
4494 return -EIO;
b569ad34 4495 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4496 if (data == NULL)
4497 return -ENOMEM;
4498 data->client = clp;
4499 data->timestamp = jiffies;
bc7a05ca 4500 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4501 &nfs4_renew_ops, data);
1da177e4
LT		 4502}
4503
8534d4ec 4504static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4505{
4506 struct rpc_message msg = {
4507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4508 .rpc_argp = clp,
b4454fe1 4509 .rpc_cred = cred,
1da177e4
LT		 4510 };
4511 unsigned long now = jiffies;
4512 int status;
4513
bc7a05ca 4514 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4515 if (status < 0)
4516 return status;
452e9352 4517 do_renew_lease(clp, now);
1da177e4
LT		 4518 return 0;
4519}
4520
aa1870af
BF		 4521static inline int nfs4_server_supports_acls(struct nfs_server *server)
4522{
7dd7d959 4523 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4524}
4525
21f498c2
TM		 4526/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4527 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4528 * the stack.
4529 */
21f498c2 4530#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4531
e9e3d724
NH		 4532static int buf_to_pages_noslab(const void *buf, size_t buflen,
4533 struct page **pages, unsigned int *pgbase)
4534{
4535 struct page *newpage, **spages;
4536 int rc = 0;
4537 size_t len;
4538 spages = pages;
4539
4540 do {
21f498c2 4541 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4542 newpage = alloc_page(GFP_KERNEL);
4543
4544 if (newpage == NULL)
4545 goto unwind;
4546 memcpy(page_address(newpage), buf, len);
4547 buf += len;
4548 buflen -= len;
4549 *pages++ = newpage;
4550 rc++;
4551 } while (buflen != 0);
4552
4553 return rc;
4554
4555unwind:
4556 for(; rc > 0; rc--)
4557 __free_page(spages[rc-1]);
4558 return -ENOMEM;
4559}
4560
e50a1c2e
BF		 4561struct nfs4_cached_acl {
4562 int cached;
4563 size_t len;
3e9d4154 4564 char data[0];
e50a1c2e
BF		 4565};
4566
4567static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4568{
4569 struct nfs_inode *nfsi = NFS_I(inode);
4570
4571 spin_lock(&inode->i_lock);
4572 kfree(nfsi->nfs4_acl);
4573 nfsi->nfs4_acl = acl;
4574 spin_unlock(&inode->i_lock);
4575}
4576
4577static void nfs4_zap_acl_attr(struct inode *inode)
4578{
4579 nfs4_set_cached_acl(inode, NULL);
4580}
4581
4582static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4583{
4584 struct nfs_inode *nfsi = NFS_I(inode);
4585 struct nfs4_cached_acl *acl;
4586 int ret = -ENOENT;
4587
4588 spin_lock(&inode->i_lock);
4589 acl = nfsi->nfs4_acl;
4590 if (acl == NULL)
4591 goto out;
4592 if (buf == NULL) /* user is just asking for length */
4593 goto out_len;
4594 if (acl->cached == 0)
4595 goto out;
4596 ret = -ERANGE; /* see getxattr(2) man page */
4597 if (acl->len > buflen)
4598 goto out;
4599 memcpy(buf, acl->data, acl->len);
4600out_len:
4601 ret = acl->len;
4602out:
4603 spin_unlock(&inode->i_lock);
4604 return ret;
4605}
4606
5794d21e 4607static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4608{
4609 struct nfs4_cached_acl *acl;
b291f1b1 4610 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4611
1f1ea6c2 4612 if (buflen <= PAGE_SIZE) {
b291f1b1 4613 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4614 if (acl == NULL)
4615 goto out;
4616 acl->cached = 1;
5794d21e 4617 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4618 } else {
4619 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4620 if (acl == NULL)
4621 goto out;
4622 acl->cached = 0;
4623 }
4624 acl->len = acl_len;
4625out:
4626 nfs4_set_cached_acl(inode, acl);
4627}
4628
bf118a34
AA		 4629/*
4630 * The getxattr API returns the required buffer length when called with a
4631 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4632 * the required buf. On a NULL buf, we send a page of data to the server
4633 * guessing that the ACL request can be serviced by a page. If so, we cache
4634 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4635 * the cache. If not so, we throw away the page, and cache the required
4636 * length. The next getxattr call will then produce another round trip to
4637 * the server, this time with the input buf of the required size.
4638 */
16b4289c 4639static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4640{
bf118a34 4641 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4642 struct nfs_getaclargs args = {
4643 .fh = NFS_FH(inode),
4644 .acl_pages = pages,
4645 .acl_len = buflen,
4646 };
663c79b3
BH		 4647 struct nfs_getaclres res = {
4648 .acl_len = buflen,
4649 };
aa1870af
BF		 4650 struct rpc_message msg = {
4651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4652 .rpc_argp = &args,
663c79b3 4653 .rpc_resp = &res,
aa1870af 4654 };
21f498c2
TM		 4655 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4656 int ret = -ENOMEM, i;
aa1870af 4657
bf118a34
AA		 4658 /* As long as we're doing a round trip to the server anyway,
4659 * let's be prepared for a page of acl data. */
4660 if (npages == 0)
4661 npages = 1;
21f498c2
TM		 4662 if (npages > ARRAY_SIZE(pages))
4663 return -ERANGE;
5a006899 4664
bf118a34
AA		 4665 for (i = 0; i < npages; i++) {
4666 pages[i] = alloc_page(GFP_KERNEL);
4667 if (!pages[i])
4668 goto out_free;
e50a1c2e 4669 }
5a006899
SP		 4670
4671 /* for decoding across pages */
4672 res.acl_scratch = alloc_page(GFP_KERNEL);
4673 if (!res.acl_scratch)
4674 goto out_free;
4675
bf118a34
AA		 4676 args.acl_len = npages * PAGE_SIZE;
4677 args.acl_pgbase = 0;
5a006899 4678
de040bec 4679 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4680 __func__, buf, buflen, npages, args.acl_len);
4681 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4682 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4683 if (ret)
4684 goto out_free;
bf118a34 4685
1f1ea6c2
TM		 4686 /* Handle the case where the passed-in buffer is too short */
4687 if (res.acl_flags & NFS4_ACL_TRUNC) {
4688 /* Did the user only issue a request for the acl length? */
4689 if (buf == NULL)
4690 goto out_ok;
e50a1c2e 4691 ret = -ERANGE;
1f1ea6c2 4692 goto out_free;
e50a1c2e 4693 }
1f1ea6c2 4694 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4695 if (buf) {
4696 if (res.acl_len > buflen) {
4697 ret = -ERANGE;
4698 goto out_free;
4699 }
1f1ea6c2 4700 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4701 }
1f1ea6c2
TM		 4702out_ok:
4703 ret = res.acl_len;
e50a1c2e 4704out_free:
bf118a34
AA		 4705 for (i = 0; i < npages; i++)
4706 if (pages[i])
4707 __free_page(pages[i]);
331818f1
TM		 4708 if (res.acl_scratch)
4709 __free_page(res.acl_scratch);
aa1870af
BF		 4710 return ret;
4711}
4712
16b4289c
TM		 4713static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4714{
4715 struct nfs4_exception exception = { };
4716 ssize_t ret;
4717 do {
4718 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4719 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4720 if (ret >= 0)
4721 break;
4722 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4723 } while (exception.retry);
4724 return ret;
4725}
4726
e50a1c2e
BF		 4727static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4728{
4729 struct nfs_server *server = NFS_SERVER(inode);
4730 int ret;
4731
4732 if (!nfs4_server_supports_acls(server))
4733 return -EOPNOTSUPP;
4734 ret = nfs_revalidate_inode(server, inode);
4735 if (ret < 0)
4736 return ret;
08a22b39
AK		 4737 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4738 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4739 ret = nfs4_read_cached_acl(inode, buf, buflen);
4740 if (ret != -ENOENT)
bf118a34
AA		 4741 /* -ENOENT is returned if there is no ACL or if there is an ACL
4742 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4743 return ret;
4744 return nfs4_get_acl_uncached(inode, buf, buflen);
4745}
4746
16b4289c 4747static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4748{
4749 struct nfs_server *server = NFS_SERVER(inode);
4750 struct page *pages[NFS4ACL_MAXPAGES];
4751 struct nfs_setaclargs arg = {
4752 .fh = NFS_FH(inode),
4753 .acl_pages = pages,
4754 .acl_len = buflen,
4755 };
73c403a9 4756 struct nfs_setaclres res;
4b580ee3
BF		 4757 struct rpc_message msg = {
4758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4759 .rpc_argp = &arg,
73c403a9 4760 .rpc_resp = &res,
4b580ee3 4761 };
21f498c2 4762 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4763 int ret, i;
4b580ee3
BF		 4764
4765 if (!nfs4_server_supports_acls(server))
4766 return -EOPNOTSUPP;
21f498c2
TM		 4767 if (npages > ARRAY_SIZE(pages))
4768 return -ERANGE;
e9e3d724
NH		 4769 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4770 if (i < 0)
4771 return i;
57ec14c5 4772 nfs4_inode_return_delegation(inode);
7c513058 4773 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4774
4775 /*
4776 * Free each page after tx, so the only ref left is
4777 * held by the network stack
4778 */
4779 for (; i > 0; i--)
4780 put_page(pages[i-1]);
4781
08a22b39
AK		 4782 /*
4783 * Acl update can result in inode attribute update.
4784 * so mark the attribute cache invalid.
4785 */
4786 spin_lock(&inode->i_lock);
4787 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4788 spin_unlock(&inode->i_lock);
f41f7418
TM		 4789 nfs_access_zap_cache(inode);
4790 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4791 return ret;
4792}
4793
16b4289c
TM		 4794static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4795{
4796 struct nfs4_exception exception = { };
4797 int err;
4798 do {
c1578b76
TM		 4799 err = __nfs4_proc_set_acl(inode, buf, buflen);
4800 trace_nfs4_set_acl(inode, err);
4801 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4802 &exception);
4803 } while (exception.retry);
4804 return err;
4805}
4806
aa9c2669
DQ		 4807#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4808static int _nfs4_get_security_label(struct inode *inode, void *buf,
4809 size_t buflen)
4810{
4811 struct nfs_server *server = NFS_SERVER(inode);
4812 struct nfs_fattr fattr;
4813 struct nfs4_label label = {0, 0, buflen, buf};
4814
4815 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4816 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4817 .fh = NFS_FH(inode),
4818 .bitmask = bitmask,
4819 };
4820 struct nfs4_getattr_res res = {
4821 .fattr = &fattr,
4822 .label = &label,
4823 .server = server,
4824 };
4825 struct rpc_message msg = {
4826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4827 .rpc_argp = &arg,
aa9c2669
DQ		 4828 .rpc_resp = &res,
4829 };
4830 int ret;
4831
4832 nfs_fattr_init(&fattr);
4833
fcb63a9b 4834 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4835 if (ret)
4836 return ret;
4837 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4838 return -ENOENT;
4839 if (buflen < label.len)
4840 return -ERANGE;
4841 return 0;
4842}
4843
4844static int nfs4_get_security_label(struct inode *inode, void *buf,
4845 size_t buflen)
4846{
4847 struct nfs4_exception exception = { };
4848 int err;
4849
4850 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4851 return -EOPNOTSUPP;
4852
4853 do {
c1578b76
TM		 4854 err = _nfs4_get_security_label(inode, buf, buflen);
4855 trace_nfs4_get_security_label(inode, err);
4856 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4857 &exception);
4858 } while (exception.retry);
4859 return err;
4860}
4861
4862static int _nfs4_do_set_security_label(struct inode *inode,
4863 struct nfs4_label *ilabel,
4864 struct nfs_fattr *fattr,
4865 struct nfs4_label *olabel)
4866{
4867
4868 struct iattr sattr = {0};
4869 struct nfs_server *server = NFS_SERVER(inode);
4870 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4871 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4872 .fh = NFS_FH(inode),
4873 .iap = &sattr,
4874 .server = server,
4875 .bitmask = bitmask,
4876 .label = ilabel,
4877 };
4878 struct nfs_setattrres res = {
4879 .fattr = fattr,
4880 .label = olabel,
4881 .server = server,
4882 };
4883 struct rpc_message msg = {
4884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4885 .rpc_argp = &arg,
aa9c2669
DQ		 4886 .rpc_resp = &res,
4887 };
4888 int status;
4889
12207f69 4890 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4891
12207f69 4892 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4893 if (status)
4894 dprintk("%s failed: %d\n", __func__, status);
4895
4896 return status;
4897}
4898
4899static int nfs4_do_set_security_label(struct inode *inode,
4900 struct nfs4_label *ilabel,
4901 struct nfs_fattr *fattr,
4902 struct nfs4_label *olabel)
4903{
4904 struct nfs4_exception exception = { };
4905 int err;
4906
4907 do {
c1578b76
TM		 4908 err = _nfs4_do_set_security_label(inode, ilabel,
4909 fattr, olabel);
4910 trace_nfs4_set_security_label(inode, err);
4911 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4912 &exception);
4913 } while (exception.retry);
4914 return err;
4915}
4916
4917static int
4918nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4919{
4920 struct nfs4_label ilabel, *olabel = NULL;
4921 struct nfs_fattr fattr;
4922 struct rpc_cred *cred;
2b0143b5 4923 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4924 int status;
4925
4926 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4927 return -EOPNOTSUPP;
4928
4929 nfs_fattr_init(&fattr);
4930
4931 ilabel.pi = 0;
4932 ilabel.lfs = 0;
4933 ilabel.label = (char *)buf;
4934 ilabel.len = buflen;
4935
4936 cred = rpc_lookup_cred();
4937 if (IS_ERR(cred))
4938 return PTR_ERR(cred);
4939
4940 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4941 if (IS_ERR(olabel)) {
4942 status = -PTR_ERR(olabel);
4943 goto out;
4944 }
4945
4946 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4947 if (status == 0)
4948 nfs_setsecurity(inode, &fattr, olabel);
4949
4950 nfs4_label_free(olabel);
4951out:
4952 put_rpccred(cred);
4953 return status;
4954}
4955#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4956
4957
1da177e4 4958static int
8478eaa1
N		 4959nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4960 struct nfs4_state *state, long *timeout)
1da177e4 4961{
aa5190d0
TM		 4962 struct nfs_client *clp = server->nfs_client;
4963
4964 if (task->tk_status >= 0)
1da177e4
LT		 4965 return 0;
4966 switch(task->tk_status) {
a1d0b5ee 4967 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4968 case -NFS4ERR_ADMIN_REVOKED:
4969 case -NFS4ERR_BAD_STATEID:
4970 case -NFS4ERR_OPENMODE:
4971 if (state == NULL)
4972 break;
5d422301 4973 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4974 goto recovery_failed;
0400a6b0 4975 goto wait_on_recovery;
0ced63d1 4976 case -NFS4ERR_EXPIRED:
5d422301
TM		 4977 if (state != NULL) {
4978 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4979 goto recovery_failed;
5d422301 4980 }
1da177e4 4981 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4982 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4983 nfs4_schedule_lease_recovery(clp);
4984 goto wait_on_recovery;
519ae255
CL		 4985 case -NFS4ERR_MOVED:
4986 if (nfs4_schedule_migration_recovery(server) < 0)
4987 goto recovery_failed;
4988 goto wait_on_recovery;
8ef2f8d4
CL		 4989 case -NFS4ERR_LEASE_MOVED:
4990 nfs4_schedule_lease_moved_recovery(clp);
4991 goto wait_on_recovery;
4745e315
AA		 4992#if defined(CONFIG_NFS_V4_1)
4993 case -NFS4ERR_BADSESSION:
4994 case -NFS4ERR_BADSLOT:
4995 case -NFS4ERR_BAD_HIGH_SLOT:
4996 case -NFS4ERR_DEADSESSION:
4997 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4998 case -NFS4ERR_SEQ_FALSE_RETRY:
4999 case -NFS4ERR_SEQ_MISORDERED:
5000 dprintk("%s ERROR %d, Reset session\n", __func__,
5001 task->tk_status);
9f594791 5002 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 5003 goto wait_on_recovery;
4745e315 5004#endif /* CONFIG_NFS_V4_1 */
1da177e4 5005 case -NFS4ERR_DELAY:
aa5190d0 5006 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 5007 rpc_delay(task, nfs4_update_delay(timeout));
5008 goto restart_call;
006ea73e 5009 case -NFS4ERR_GRACE:
1da177e4 5010 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 5011 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 5012 case -NFS4ERR_OLD_STATEID:
f1478c13 5013 goto restart_call;
1da177e4
LT		 5014 }
5015 task->tk_status = nfs4_map_errors(task->tk_status);
5016 return 0;
9f51a78e 5017recovery_failed:
5d422301
TM		 5018 task->tk_status = -EIO;
5019 return 0;
0400a6b0 5020wait_on_recovery:
a2c0b9e2 5021 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 5022 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
5023 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 5024 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
5025 goto recovery_failed;
f1478c13 5026restart_call:
a2c0b9e2
TM		 5027 task->tk_status = 0;
5028 return -EAGAIN;
1da177e4
LT		 5029}
5030
f092075d
CL		 5031static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5032 nfs4_verifier *bootverf)
cd93710e
CL		 5033{
5034 __be32 verf[2];
5035
2c820d9a
CL		 5036 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5037 /* An impossible timestamp guarantees this value
5038 * will never match a generated boot time. */
5039 verf[0] = 0;
17f26b12 5040 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5041 } else {
f092075d 5042 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5043 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5044 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5045 }
cd93710e
CL		 5046 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5047}
5048
a3192688
JL		 5049static int
5050nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5051{
a3192688
JL		 5052 int result;
5053 size_t len;
5054 char *str;
e984a55a 5055
ceb3a16c 5056 if (clp->cl_owner_id != NULL)
a3192688 5057 return 0;
4a3e5779 5058
a3192688 5059 rcu_read_lock();
4a70316c 5060 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5061 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5062 1 +
5063 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5064 1;
5065 rcu_read_unlock();
5066
5067 if (len > NFS4_OPAQUE_LIMIT + 1)
5068 return -EINVAL;
5069
5070 /*
5071 * Since this string is allocated at mount time, and held until the
5072 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5073 * about a memory-reclaim deadlock.
5074 */
5075 str = kmalloc(len, GFP_KERNEL);
5076 if (!str)
5077 return -ENOMEM;
ceb3a16c 5078
e984a55a 5079 rcu_read_lock();
a3192688
JL		 5080 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5081 clp->cl_ipaddr,
5082 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5083 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5084 rcu_read_unlock();
a3192688 5085
a3192688
JL		 5086 clp->cl_owner_id = str;
5087 return 0;
e984a55a
CL		 5088}
5089
873e3851
JL		 5090static int
5091nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5092{
5093 int result;
5094 size_t len;
5095 char *str;
5096
5097 len = 10 + 10 + 1 + 10 + 1 +
5098 strlen(nfs4_client_id_uniquifier) + 1 +
5099 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5100
5101 if (len > NFS4_OPAQUE_LIMIT + 1)
5102 return -EINVAL;
5103
5104 /*
5105 * Since this string is allocated at mount time, and held until the
5106 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5107 * about a memory-reclaim deadlock.
5108 */
5109 str = kmalloc(len, GFP_KERNEL);
5110 if (!str)
5111 return -ENOMEM;
5112
5113 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5114 clp->rpc_ops->version, clp->cl_minorversion,
5115 nfs4_client_id_uniquifier,
5116 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5117 clp->cl_owner_id = str;
5118 return 0;
5119}
5120
5121static int
5122nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5123{
873e3851
JL		 5124 int result;
5125 size_t len;
5126 char *str;
ceb3a16c
TM		 5127
5128 if (clp->cl_owner_id != NULL)
873e3851 5129 return 0;
6f2ea7f2
CL		 5130
5131 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5132 return nfs4_init_uniquifier_client_string(clp);
5133
5134 len = 10 + 10 + 1 + 10 + 1 +
5135 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5136
5137 if (len > NFS4_OPAQUE_LIMIT + 1)
5138 return -EINVAL;
5139
5140 /*
5141 * Since this string is allocated at mount time, and held until the
5142 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5143 * about a memory-reclaim deadlock.
5144 */
5145 str = kmalloc(len, GFP_KERNEL);
5146 if (!str)
5147 return -ENOMEM;
5148
5149 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5150 clp->rpc_ops->version, clp->cl_minorversion,
5151 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5152 clp->cl_owner_id = str;
5153 return 0;
e984a55a
CL		 5154}
5155
706cb8db
CL		 5156/*
5157 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5158 * services. Advertise one based on the address family of the
5159 * clientaddr.
5160 */
5161static unsigned int
5162nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5163{
5164 if (strchr(clp->cl_ipaddr, ':') != NULL)
5165 return scnprintf(buf, len, "tcp6");
5166 else
5167 return scnprintf(buf, len, "tcp");
5168}
5169
f11b2a1c
JL		 5170static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5171{
5172 struct nfs4_setclientid *sc = calldata;
5173
5174 if (task->tk_status == 0)
5175 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5176}
5177
5178static const struct rpc_call_ops nfs4_setclientid_ops = {
5179 .rpc_call_done = nfs4_setclientid_done,
5180};
5181
6bbb4ae8
CL		 5182/**
5183 * nfs4_proc_setclientid - Negotiate client ID
5184 * @clp: state data structure
5185 * @program: RPC program for NFSv4 callback service
5186 * @port: IP port number for NFS4 callback service
5187 * @cred: RPC credential to use for this call
5188 * @res: where to place the result
5189 *
5190 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5191 */
bb8b27e5
TM		 5192int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5193 unsigned short port, struct rpc_cred *cred,
5194 struct nfs4_setclientid_res *res)
1da177e4
LT		 5195{
5196 nfs4_verifier sc_verifier;
5197 struct nfs4_setclientid setclientid = {
5198 .sc_verifier = &sc_verifier,
5199 .sc_prog = program,
3a6bb738 5200 .sc_clnt = clp,
1da177e4
LT		 5201 };
5202 struct rpc_message msg = {
5203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5204 .rpc_argp = &setclientid,
bb8b27e5 5205 .rpc_resp = res,
286d7d6a 5206 .rpc_cred = cred,
1da177e4 5207 };
f11b2a1c
JL		 5208 struct rpc_task *task;
5209 struct rpc_task_setup task_setup_data = {
5210 .rpc_client = clp->cl_rpcclient,
5211 .rpc_message = &msg,
5212 .callback_ops = &nfs4_setclientid_ops,
5213 .callback_data = &setclientid,
5214 .flags = RPC_TASK_TIMEOUT,
5215 };
6bbb4ae8 5216 int status;
1da177e4 5217
de734831 5218 /* nfs_client_id4 */
f092075d 5219 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5220
5221 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5222 status = nfs4_init_uniform_client_string(clp);
5223 else
a3192688 5224 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5225
5226 if (status)
5227 goto out;
3a6bb738 5228
de734831 5229 /* cb_client4 */
706cb8db
CL		 5230 setclientid.sc_netid_len =
5231 nfs4_init_callback_netid(clp,
5232 setclientid.sc_netid,
5233 sizeof(setclientid.sc_netid));
de734831 5234 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5235 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5236 clp->cl_ipaddr, port >> 8, port & 255);
5237
3a6bb738 5238 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5239 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5240 clp->cl_owner_id);
f11b2a1c
JL		 5241 task = rpc_run_task(&task_setup_data);
5242 if (IS_ERR(task)) {
5243 status = PTR_ERR(task);
5244 goto out;
5245 }
5246 status = task->tk_status;
5247 if (setclientid.sc_cred) {
5248 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5249 put_rpccred(setclientid.sc_cred);
5250 }
5251 rpc_put_task(task);
5252out:
c6d01c6f 5253 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5254 dprintk("NFS reply setclientid: %d\n", status);
5255 return status;
1da177e4
LT		 5256}
5257
6bbb4ae8
CL		 5258/**
5259 * nfs4_proc_setclientid_confirm - Confirm client ID
5260 * @clp: state data structure
5261 * @res: result of a previous SETCLIENTID
5262 * @cred: RPC credential to use for this call
5263 *
5264 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5265 */
fd954ae1 5266int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5267 struct nfs4_setclientid_res *arg,
5268 struct rpc_cred *cred)
1da177e4 5269{
1da177e4
LT		 5270 struct rpc_message msg = {
5271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5272 .rpc_argp = arg,
286d7d6a 5273 .rpc_cred = cred,
1da177e4 5274 };
1da177e4
LT		 5275 int status;
5276
6bbb4ae8
CL		 5277 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5278 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5279 clp->cl_clientid);
1bd714f2 5280 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5281 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5282 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5283 return status;
5284}
5285
fe650407
TM		 5286struct nfs4_delegreturndata {
5287 struct nfs4_delegreturnargs args;
fa178f29 5288 struct nfs4_delegreturnres res;
fe650407
TM		 5289 struct nfs_fh fh;
5290 nfs4_stateid stateid;
26e976a8 5291 unsigned long timestamp;
fa178f29 5292 struct nfs_fattr fattr;
fe650407 5293 int rpc_status;
039b756a
PT		 5294 struct inode *inode;
5295 bool roc;
5296 u32 roc_barrier;
fe650407
TM		 5297};
5298
fe650407
TM		 5299static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5300{
5301 struct nfs4_delegreturndata *data = calldata;
938e1010 5302
14516c3a
TM		 5303 if (!nfs4_sequence_done(task, &data->res.seq_res))
5304 return;
938e1010 5305
ca8acf8d 5306 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5307 switch (task->tk_status) {
79708861 5308 case 0:
fa178f29 5309 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5310 case -NFS4ERR_ADMIN_REVOKED:
5311 case -NFS4ERR_DELEG_REVOKED:
5312 case -NFS4ERR_BAD_STATEID:
5313 case -NFS4ERR_OLD_STATEID:
5314 case -NFS4ERR_STALE_STATEID:
5315 case -NFS4ERR_EXPIRED:
5316 task->tk_status = 0;
039b756a
PT		 5317 if (data->roc)
5318 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5319 break;
79708861 5320 default:
8478eaa1
N		 5321 if (nfs4_async_handle_error(task, data->res.server,
5322 NULL, NULL) == -EAGAIN) {
d00c5d43 5323 rpc_restart_call_prepare(task);
79708861
RL		 5324 return;
5325 }
5326 }
5327 data->rpc_status = task->tk_status;
fe650407
TM		 5328}
5329
5330static void nfs4_delegreturn_release(void *calldata)
5331{
039b756a 5332 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5333 struct inode *inode = data->inode;
039b756a 5334
ea7c38fe
TM		 5335 if (inode) {
5336 if (data->roc)
5337 pnfs_roc_release(inode);
5338 nfs_iput_and_deactive(inode);
5339 }
fe650407
TM		 5340 kfree(calldata);
5341}
5342
938e1010
AA		 5343static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5344{
5345 struct nfs4_delegreturndata *d_data;
5346
5347 d_data = (struct nfs4_delegreturndata *)data;
5348
500d701f
PT		 5349 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5350 return;
5351
4ff376fe
TM		 5352 if (d_data->roc)
5353 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5354
d9afbd1b
TM		 5355 nfs4_setup_sequence(d_data->res.server,
5356 &d_data->args.seq_args,
5357 &d_data->res.seq_res,
5358 task);
938e1010 5359}
938e1010 5360
c8d149f3 5361static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5362 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5363 .rpc_call_done = nfs4_delegreturn_done,
5364 .rpc_release = nfs4_delegreturn_release,
5365};
5366
e6f81075 5367static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5368{
5369 struct nfs4_delegreturndata *data;
fa178f29 5370 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5371 struct rpc_task *task;
5138fde0
TM		 5372 struct rpc_message msg = {
5373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5374 .rpc_cred = cred,
5375 };
c970aa85
TM		 5376 struct rpc_task_setup task_setup_data = {
5377 .rpc_client = server->client,
5138fde0 5378 .rpc_message = &msg,
c970aa85
TM		 5379 .callback_ops = &nfs4_delegreturn_ops,
5380 .flags = RPC_TASK_ASYNC,
5381 };
e6f81075 5382 int status = 0;
fe650407 5383
8535b2be 5384 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5385 if (data == NULL)
5386 return -ENOMEM;
a9c92d6b 5387 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5388 data->args.fhandle = &data->fh;
5389 data->args.stateid = &data->stateid;
9e907fec 5390 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5391 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5392 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5393 data->res.fattr = &data->fattr;
5394 data->res.server = server;
5138fde0 5395 nfs_fattr_init(data->res.fattr);
26e976a8 5396 data->timestamp = jiffies;
fe650407 5397 data->rpc_status = 0;
ea7c38fe
TM		 5398 data->inode = nfs_igrab_and_active(inode);
5399 if (data->inode)
5400 data->roc = nfs4_roc(inode);
fe650407 5401
c970aa85 5402 task_setup_data.callback_data = data;
1174dd1f
TM		 5403 msg.rpc_argp = &data->args;
5404 msg.rpc_resp = &data->res;
c970aa85 5405 task = rpc_run_task(&task_setup_data);
7a1218a2 5406 if (IS_ERR(task))
fe650407 5407 return PTR_ERR(task);
e6f81075
TM		 5408 if (!issync)
5409 goto out;
fe650407 5410 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5411 if (status != 0)
5412 goto out;
5413 status = data->rpc_status;
e144cbcc
TM		 5414 if (status == 0)
5415 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5416 else
5417 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5418out:
e6b3c4db 5419 rpc_put_task(task);
fe650407 5420 return status;
1da177e4
LT		 5421}
5422
e6f81075 5423int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5424{
5425 struct nfs_server *server = NFS_SERVER(inode);
5426 struct nfs4_exception exception = { };
5427 int err;
5428 do {
e6f81075 5429 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5430 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5431 switch (err) {
5432 case -NFS4ERR_STALE_STATEID:
5433 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5434 case 0:
5435 return 0;
5436 }
5437 err = nfs4_handle_exception(server, err, &exception);
5438 } while (exception.retry);
5439 return err;
5440}
5441
5442#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5443#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5444
5445/*
5446 * sleep, with exponential backoff, and retry the LOCK operation.
5447 */
5448static unsigned long
5449nfs4_set_lock_task_retry(unsigned long timeout)
5450{
416ad3c9 5451 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5452 timeout <<= 1;
5453 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5454 return NFS4_LOCK_MAXTIMEOUT;
5455 return timeout;
5456}
5457
1da177e4
LT		 5458static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5459{
5460 struct inode *inode = state->inode;
5461 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5462 struct nfs_client *clp = server->nfs_client;
911d1aaf 5463 struct nfs_lockt_args arg = {
1da177e4 5464 .fh = NFS_FH(inode),
911d1aaf 5465 .fl = request,
1da177e4 5466 };
911d1aaf
TM		 5467 struct nfs_lockt_res res = {
5468 .denied = request,
1da177e4
LT		 5469 };
5470 struct rpc_message msg = {
5471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5472 .rpc_argp = &arg,
5473 .rpc_resp = &res,
5474 .rpc_cred = state->owner->so_cred,
5475 };
1da177e4
LT		 5476 struct nfs4_lock_state *lsp;
5477 int status;
5478
911d1aaf 5479 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5480 status = nfs4_set_lock_state(state, request);
5481 if (status != 0)
5482 goto out;
5483 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5484 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5485 arg.lock_owner.s_dev = server->s_dev;
7c513058 5486 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5487 switch (status) {
5488 case 0:
5489 request->fl_type = F_UNLCK;
5490 break;
5491 case -NFS4ERR_DENIED:
5492 status = 0;
1da177e4 5493 }
70cc6487 5494 request->fl_ops->fl_release_private(request);
a6f951dd 5495 request->fl_ops = NULL;
8d0a8a9d 5496out:
1da177e4
LT		 5497 return status;
5498}
5499
5500static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5501{
5502 struct nfs4_exception exception = { };
5503 int err;
5504
5505 do {
d1b748a5
TM		 5506 err = _nfs4_proc_getlk(state, cmd, request);
5507 trace_nfs4_get_lock(request, state, cmd, err);
5508 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5509 &exception);
5510 } while (exception.retry);
5511 return err;
5512}
5513
83bfff23 5514static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5515{
5516 int res = 0;
5517 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5518 case FL_POSIX:
83bfff23 5519 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5520 break;
5521 case FL_FLOCK:
83bfff23 5522 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5523 break;
5524 default:
5525 BUG();
5526 }
1da177e4
LT		 5527 return res;
5528}
5529
faf5f49c 5530struct nfs4_unlockdata {
911d1aaf
TM		 5531 struct nfs_locku_args arg;
5532 struct nfs_locku_res res;
faf5f49c
TM		 5533 struct nfs4_lock_state *lsp;
5534 struct nfs_open_context *ctx;
911d1aaf
TM		 5535 struct file_lock fl;
5536 const struct nfs_server *server;
26e976a8 5537 unsigned long timestamp;
faf5f49c
TM		 5538};
5539
911d1aaf
TM		 5540static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5541 struct nfs_open_context *ctx,
5542 struct nfs4_lock_state *lsp,
5543 struct nfs_seqid *seqid)
5544{
5545 struct nfs4_unlockdata *p;
5546 struct inode *inode = lsp->ls_state->inode;
5547
8535b2be 5548 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5549 if (p == NULL)
5550 return NULL;
5551 p->arg.fh = NFS_FH(inode);
5552 p->arg.fl = &p->fl;
5553 p->arg.seqid = seqid;
c1d51931 5554 p->res.seqid = seqid;
911d1aaf
TM		 5555 p->lsp = lsp;
5556 atomic_inc(&lsp->ls_count);
5557 /* Ensure we don't close file until we're done freeing locks! */
5558 p->ctx = get_nfs_open_context(ctx);
5559 memcpy(&p->fl, fl, sizeof(p->fl));
5560 p->server = NFS_SERVER(inode);
5561 return p;
5562}
5563
06f814a3 5564static void nfs4_locku_release_calldata(void *data)
faf5f49c 5565{
963d8fe5 5566 struct nfs4_unlockdata *calldata = data;
911d1aaf 5567 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5568 nfs4_put_lock_state(calldata->lsp);
5569 put_nfs_open_context(calldata->ctx);
5570 kfree(calldata);
faf5f49c
TM		 5571}
5572
963d8fe5 5573static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5574{
963d8fe5 5575 struct nfs4_unlockdata *calldata = data;
faf5f49c 5576
14516c3a
TM		 5577 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5578 return;
faf5f49c
TM		 5579 switch (task->tk_status) {
5580 case 0:
26e976a8 5581 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5582 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5583 if (nfs4_update_lock_stateid(calldata->lsp,
5584 &calldata->res.stateid))
5585 break;
9e33bed5
TM		 5586 case -NFS4ERR_BAD_STATEID:
5587 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5588 case -NFS4ERR_STALE_STATEID:
5589 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5590 if (!nfs4_stateid_match(&calldata->arg.stateid,
5591 &calldata->lsp->ls_stateid))
5592 rpc_restart_call_prepare(task);
faf5f49c
TM		 5593 break;
5594 default:
8478eaa1
N		 5595 if (nfs4_async_handle_error(task, calldata->server,
5596 NULL, NULL) == -EAGAIN)
d00c5d43 5597 rpc_restart_call_prepare(task);
faf5f49c 5598 }
2b1bc308 5599 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5600}
5601
4ce70ada 5602static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5603{
4ce70ada 5604 struct nfs4_unlockdata *calldata = data;
faf5f49c 5605
911d1aaf 5606 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5607 goto out_wait;
425c1d4e 5608 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5609 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5610 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5611 goto out_no_action;
faf5f49c 5612 }
26e976a8 5613 calldata->timestamp = jiffies;
035168ab 5614 if (nfs4_setup_sequence(calldata->server,
a893693c 5615 &calldata->arg.seq_args,
2240a9e2
TM		 5616 &calldata->res.seq_res,
5617 task) != 0)
5618 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5619 return;
5620out_no_action:
5621 task->tk_action = NULL;
5622out_wait:
5623 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5624}
5625
963d8fe5 5626static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5627 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5628 .rpc_call_done = nfs4_locku_done,
06f814a3 5629 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5630};
5631
a5d16a4d
TM		 5632static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5633 struct nfs_open_context *ctx,
5634 struct nfs4_lock_state *lsp,
5635 struct nfs_seqid *seqid)
5636{
5637 struct nfs4_unlockdata *data;
5138fde0
TM		 5638 struct rpc_message msg = {
5639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5640 .rpc_cred = ctx->cred,
5641 };
c970aa85
TM		 5642 struct rpc_task_setup task_setup_data = {
5643 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5644 .rpc_message = &msg,
c970aa85 5645 .callback_ops = &nfs4_locku_ops,
101070ca 5646 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5647 .flags = RPC_TASK_ASYNC,
5648 };
a5d16a4d 5649
fa940720
WAA		 5650 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5651 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5652
137d6aca
FF		 5653 /* Ensure this is an unlock - when canceling a lock, the
5654 * canceled lock is passed in, and it won't be an unlock.
5655 */
5656 fl->fl_type = F_UNLCK;
5657
a5d16a4d
TM		 5658 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5659 if (data == NULL) {
5660 nfs_free_seqid(seqid);
5661 return ERR_PTR(-ENOMEM);
5662 }
5663
a9c92d6b 5664 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5665 msg.rpc_argp = &data->arg;
5666 msg.rpc_resp = &data->res;
c970aa85
TM		 5667 task_setup_data.callback_data = data;
5668 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5669}
5670
faf5f49c
TM		 5671static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5672{
65b62a29
TM		 5673 struct inode *inode = state->inode;
5674 struct nfs4_state_owner *sp = state->owner;
5675 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5676 struct nfs_seqid *seqid;
1da177e4 5677 struct nfs4_lock_state *lsp;
06f814a3 5678 struct rpc_task *task;
b4019c0e 5679 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5680 int status = 0;
536ff0f8 5681 unsigned char fl_flags = request->fl_flags;
faf5f49c 5682
8d0a8a9d 5683 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5684 /* Unlock _before_ we do the RPC call */
5685 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5686 /* Exclude nfs_delegation_claim_locks() */
5687 mutex_lock(&sp->so_delegreturn_mutex);
5688 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5689 down_read(&nfsi->rwsem);
83bfff23 5690 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5691 up_read(&nfsi->rwsem);
65b62a29 5692 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5693 goto out;
19e03c57
TM		 5694 }
5695 up_read(&nfsi->rwsem);
65b62a29 5696 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5697 if (status != 0)
9b073574
TM		 5698 goto out;
5699 /* Is this a delegated lock? */
8d0a8a9d 5700 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5701 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5702 goto out;
b4019c0e
TM		 5703 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5704 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5705 status = -ENOMEM;
badc76dd 5706 if (IS_ERR(seqid))
9b073574 5707 goto out;
cd3758e3 5708 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5709 status = PTR_ERR(task);
5710 if (IS_ERR(task))
9b073574 5711 goto out;
a5d16a4d 5712 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5713 rpc_put_task(task);
9b073574 5714out:
536ff0f8 5715 request->fl_flags = fl_flags;
d1b748a5 5716 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5717 return status;
5718}
5719
a5d16a4d
TM		 5720struct nfs4_lockdata {
5721 struct nfs_lock_args arg;
5722 struct nfs_lock_res res;
5723 struct nfs4_lock_state *lsp;
5724 struct nfs_open_context *ctx;
5725 struct file_lock fl;
26e976a8 5726 unsigned long timestamp;
a5d16a4d
TM		 5727 int rpc_status;
5728 int cancelled;
66179efe 5729 struct nfs_server *server;
a5d16a4d
TM		 5730};
5731
5732static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5733 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5734 gfp_t gfp_mask)
1da177e4 5735{
a5d16a4d
TM		 5736 struct nfs4_lockdata *p;
5737 struct inode *inode = lsp->ls_state->inode;
1da177e4 5738 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5739 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5740
8535b2be 5741 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5742 if (p == NULL)
5743 return NULL;
5744
5745 p->arg.fh = NFS_FH(inode);
5746 p->arg.fl = &p->fl;
8535b2be 5747 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5748 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5749 goto out_free;
b4019c0e
TM		 5750 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5751 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5752 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5753 goto out_free_seqid;
7539bbab 5754 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5755 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5756 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5757 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5758 p->lsp = lsp;
66179efe 5759 p->server = server;
a5d16a4d
TM		 5760 atomic_inc(&lsp->ls_count);
5761 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5762 get_file(fl->fl_file);
a5d16a4d
TM		 5763 memcpy(&p->fl, fl, sizeof(p->fl));
5764 return p;
2f74c0a0
TM		 5765out_free_seqid:
5766 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5767out_free:
5768 kfree(p);
5769 return NULL;
5770}
5771
5772static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5773{
5774 struct nfs4_lockdata *data = calldata;
5775 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5776
3110ff80 5777 dprintk("%s: begin!\n", __func__);
2f74c0a0 5778 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5779 goto out_wait;
a5d16a4d 5780 /* Do we need to do an open_to_lock_owner? */
6b447539 5781 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5782 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5783 goto out_release_lock_seqid;
8fe72bac 5784 }
425c1d4e
TM		 5785 nfs4_stateid_copy(&data->arg.open_stateid,
5786 &state->open_stateid);
a5d16a4d 5787 data->arg.new_lock_owner = 1;
c1d51931 5788 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5789 } else {
2f74c0a0 5790 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5791 nfs4_stateid_copy(&data->arg.lock_stateid,
5792 &data->lsp->ls_stateid);
5793 }
5d422301
TM		 5794 if (!nfs4_valid_open_stateid(state)) {
5795 data->rpc_status = -EBADF;
5796 task->tk_action = NULL;
5797 goto out_release_open_seqid;
5798 }
26e976a8 5799 data->timestamp = jiffies;
035168ab
TM		 5800 if (nfs4_setup_sequence(data->server,
5801 &data->arg.seq_args,
2240a9e2 5802 &data->res.seq_res,
d9afbd1b 5803 task) == 0)
66179efe 5804 return;
5d422301 5805out_release_open_seqid:
2240a9e2
TM		 5806 nfs_release_seqid(data->arg.open_seqid);
5807out_release_lock_seqid:
5808 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5809out_wait:
5810 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5811 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5812}
5813
a5d16a4d
TM		 5814static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5815{
5816 struct nfs4_lockdata *data = calldata;
39071e6f 5817 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5818
3110ff80 5819 dprintk("%s: begin!\n", __func__);
a5d16a4d 5820
14516c3a
TM		 5821 if (!nfs4_sequence_done(task, &data->res.seq_res))
5822 return;
66179efe 5823
a5d16a4d 5824 data->rpc_status = task->tk_status;
425c1d4e
TM		 5825 switch (task->tk_status) {
5826 case 0:
2b0143b5 5827 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5828 data->timestamp);
c69899a1
TM		 5829 if (data->arg.new_lock) {
5830 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5831 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5832 rpc_restart_call_prepare(task);
5833 break;
5834 }
5835 }
39071e6f
TM		 5836 if (data->arg.new_lock_owner != 0) {
5837 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5838 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5839 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5840 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5841 rpc_restart_call_prepare(task);
425c1d4e
TM		 5842 break;
5843 case -NFS4ERR_BAD_STATEID:
5844 case -NFS4ERR_OLD_STATEID:
5845 case -NFS4ERR_STALE_STATEID:
5846 case -NFS4ERR_EXPIRED:
5847 if (data->arg.new_lock_owner != 0) {
5848 if (!nfs4_stateid_match(&data->arg.open_stateid,
5849 &lsp->ls_state->open_stateid))
5850 rpc_restart_call_prepare(task);
5851 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5852 &lsp->ls_stateid))
5853 rpc_restart_call_prepare(task);
a5d16a4d 5854 }
3110ff80 5855 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5856}
5857
5858static void nfs4_lock_release(void *calldata)
5859{
5860 struct nfs4_lockdata *data = calldata;
5861
3110ff80 5862 dprintk("%s: begin!\n", __func__);
2f74c0a0 5863 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5864 if (data->cancelled != 0) {
5865 struct rpc_task *task;
5866 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5867 data->arg.lock_seqid);
5868 if (!IS_ERR(task))
bf294b41 5869 rpc_put_task_async(task);
3110ff80 5870 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5871 } else
5872 nfs_free_seqid(data->arg.lock_seqid);
5873 nfs4_put_lock_state(data->lsp);
5874 put_nfs_open_context(data->ctx);
feaff8e5 5875 fput(data->fl.fl_file);
a5d16a4d 5876 kfree(data);
3110ff80 5877 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5878}
5879
5880static const struct rpc_call_ops nfs4_lock_ops = {
5881 .rpc_call_prepare = nfs4_lock_prepare,
5882 .rpc_call_done = nfs4_lock_done,
5883 .rpc_release = nfs4_lock_release,
5884};
5885
2bee72a6
TM		 5886static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5887{
2bee72a6
TM		 5888 switch (error) {
5889 case -NFS4ERR_ADMIN_REVOKED:
5890 case -NFS4ERR_BAD_STATEID:
ecac799a 5891 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5892 if (new_lock_owner != 0 ||
795a88c9 5893 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5894 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5895 break;
5896 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5897 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5898 case -NFS4ERR_EXPIRED:
5899 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5900 };
5901}
5902
afe6c27c 5903static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5904{
5905 struct nfs4_lockdata *data;
5906 struct rpc_task *task;
5138fde0
TM		 5907 struct rpc_message msg = {
5908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5909 .rpc_cred = state->owner->so_cred,
5910 };
c970aa85
TM		 5911 struct rpc_task_setup task_setup_data = {
5912 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5913 .rpc_message = &msg,
c970aa85 5914 .callback_ops = &nfs4_lock_ops,
101070ca 5915 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5916 .flags = RPC_TASK_ASYNC,
5917 };
a5d16a4d
TM		 5918 int ret;
5919
3110ff80 5920 dprintk("%s: begin!\n", __func__);
cd3758e3 5921 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5922 fl->fl_u.nfs4_fl.owner,
5923 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5924 if (data == NULL)
5925 return -ENOMEM;
5926 if (IS_SETLKW(cmd))
5927 data->arg.block = 1;
a9c92d6b 5928 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5929 msg.rpc_argp = &data->arg;
5930 msg.rpc_resp = &data->res;
c970aa85 5931 task_setup_data.callback_data = data;
8fe72bac
TM		 5932 if (recovery_type > NFS_LOCK_NEW) {
5933 if (recovery_type == NFS_LOCK_RECLAIM)
5934 data->arg.reclaim = NFS_LOCK_RECLAIM;
5935 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5936 } else
5937 data->arg.new_lock = 1;
c970aa85 5938 task = rpc_run_task(&task_setup_data);
7a1218a2 5939 if (IS_ERR(task))
a5d16a4d 5940 return PTR_ERR(task);
a5d16a4d
TM		 5941 ret = nfs4_wait_for_completion_rpc_task(task);
5942 if (ret == 0) {
5943 ret = data->rpc_status;
2bee72a6
TM		 5944 if (ret)
5945 nfs4_handle_setlk_error(data->server, data->lsp,
5946 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5947 } else
5948 data->cancelled = 1;
e6b3c4db 5949 rpc_put_task(task);
3110ff80 5950 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5951 return ret;
1da177e4
LT		 5952}
5953
5954static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5955{
202b50dc 5956 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5957 struct nfs4_exception exception = {
5958 .inode = state->inode,
5959 };
202b50dc
TM		 5960 int err;
5961
5962 do {
42a2d13e
TM		 5963 /* Cache the lock if possible... */
5964 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5965 return 0;
afe6c27c 5966 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5967 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5968 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5969 break;
5970 nfs4_handle_exception(server, err, &exception);
5971 } while (exception.retry);
5972 return err;
1da177e4
LT		 5973}
5974
5975static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5976{
202b50dc 5977 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5978 struct nfs4_exception exception = {
5979 .inode = state->inode,
5980 };
202b50dc
TM		 5981 int err;
5982
6bfc93ef
TM		 5983 err = nfs4_set_lock_state(state, request);
5984 if (err != 0)
5985 return err;
f6de7a39 5986 if (!recover_lost_locks) {
ef1820f9
N		 5987 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5988 return 0;
5989 }
202b50dc 5990 do {
42a2d13e
TM		 5991 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5992 return 0;
afe6c27c 5993 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5994 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5995 switch (err) {
5996 default:
5997 goto out;
5998 case -NFS4ERR_GRACE:
5999 case -NFS4ERR_DELAY:
6000 nfs4_handle_exception(server, err, &exception);
6001 err = 0;
6002 }
202b50dc 6003 } while (exception.retry);
a9ed2e25 6004out:
202b50dc 6005 return err;
1da177e4
LT		 6006}
6007
f062eb6c 6008#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6009/**
6010 * nfs41_check_expired_locks - possibly free a lock stateid
6011 *
6012 * @state: NFSv4 state for an inode
6013 *
6014 * Returns NFS_OK if recovery for this stateid is now finished.
6015 * Otherwise a negative NFS4ERR value is returned.
6016 */
b01dd1d8 6017static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6018{
eb64cf96 6019 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6020 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6021 struct nfs_server *server = NFS_SERVER(state->inode);
6022
b01dd1d8 6023 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6024 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6025 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6026
6027 status = nfs41_test_stateid(server,
6028 &lsp->ls_stateid,
6029 cred);
08cb47fa 6030 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6031 if (status != NFS_OK) {
3e60ffdd
CL		 6032 /* Free the stateid unless the server
6033 * informs us the stateid is unrecognized. */
89af2739
CL		 6034 if (status != -NFS4ERR_BAD_STATEID)
6035 nfs41_free_stateid(server,
ab7cb0df
TM		 6036 &lsp->ls_stateid,
6037 cred);
795a88c9 6038 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6039 ret = status;
6040 }
6041 }
6042 };
6043
6044 return ret;
6045}
6046
6047static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6048{
6049 int status = NFS_OK;
6050
6051 if (test_bit(LK_STATE_IN_USE, &state->flags))
6052 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6053 if (status != NFS_OK)
6054 status = nfs4_lock_expired(state, request);
6055 return status;
f062eb6c
BS		 6056}
6057#endif
6058
1da177e4
LT		 6059static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6060{
19e03c57 6061 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6062 unsigned char fl_flags = request->fl_flags;
8e469ebd 6063 int status = -ENOLCK;
1da177e4 6064
8e469ebd
TM		 6065 if ((fl_flags & FL_POSIX) &&
6066 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6067 goto out;
6bfc93ef 6068 /* Is this a delegated open? */
6bfc93ef
TM		 6069 status = nfs4_set_lock_state(state, request);
6070 if (status != 0)
6071 goto out;
01c3b861 6072 request->fl_flags |= FL_ACCESS;
83bfff23 6073 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6074 if (status < 0)
6075 goto out;
19e03c57 6076 down_read(&nfsi->rwsem);
01c3b861 6077 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6078 /* Yes: cache locks! */
01c3b861 6079 /* ...but avoid races with delegation recall... */
19e03c57 6080 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6081 status = do_vfs_lock(state->inode, request);
c69899a1 6082 up_read(&nfsi->rwsem);
9a99af49 6083 goto out;
9a99af49 6084 }
19e03c57 6085 up_read(&nfsi->rwsem);
c69899a1 6086 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6087out:
6088 request->fl_flags = fl_flags;
1da177e4
LT		 6089 return status;
6090}
6091
6092static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6093{
a1d0b5ee
TM		 6094 struct nfs4_exception exception = {
6095 .state = state,
05ffe24f 6096 .inode = state->inode,
a1d0b5ee 6097 };
1da177e4
LT		 6098 int err;
6099
6100 do {
965b5d67 6101 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6102 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6103 if (err == -NFS4ERR_DENIED)
6104 err = -EAGAIN;
1da177e4 6105 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6106 err, &exception);
1da177e4
LT		 6107 } while (exception.retry);
6108 return err;
6109}
6110
6111static int
6112nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6113{
6114 struct nfs_open_context *ctx;
6115 struct nfs4_state *state;
6116 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6117 int status;
6118
6119 /* verify open state */
cd3758e3 6120 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6121 state = ctx->state;
6122
6123 if (request->fl_start < 0 || request->fl_end < 0)
6124 return -EINVAL;
6125
d953126a
TM		 6126 if (IS_GETLK(cmd)) {
6127 if (state != NULL)
6128 return nfs4_proc_getlk(state, F_GETLK, request);
6129 return 0;
6130 }
1da177e4
LT		 6131
6132 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6133 return -EINVAL;
6134
d953126a
TM		 6135 if (request->fl_type == F_UNLCK) {
6136 if (state != NULL)
6137 return nfs4_proc_unlck(state, cmd, request);
6138 return 0;
6139 }
1da177e4 6140
d953126a
TM		 6141 if (state == NULL)
6142 return -ENOLCK;
55725513
TM		 6143 /*
6144 * Don't rely on the VFS having checked the file open mode,
6145 * since it won't do this for flock() locks.
6146 */
f44106e2 6147 switch (request->fl_type) {
55725513
TM		 6148 case F_RDLCK:
6149 if (!(filp->f_mode & FMODE_READ))
6150 return -EBADF;
6151 break;
6152 case F_WRLCK:
6153 if (!(filp->f_mode & FMODE_WRITE))
6154 return -EBADF;
6155 }
6156
1da177e4
LT		 6157 do {
6158 status = nfs4_proc_setlk(state, cmd, request);
6159 if ((status != -EAGAIN) || IS_SETLK(cmd))
6160 break;
6161 timeout = nfs4_set_lock_task_retry(timeout);
6162 status = -ERESTARTSYS;
6163 if (signalled())
6164 break;
6165 } while(status < 0);
1da177e4
LT		 6166 return status;
6167}
6168
db4f2e63 6169int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6170{
6171 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6172 int err;
6173
6174 err = nfs4_set_lock_state(state, fl);
6175 if (err != 0)
db4f2e63 6176 return err;
4a706fa0 6177 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6178 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6179}
6b3b5496 6180
cf470c3e
TM		 6181struct nfs_release_lockowner_data {
6182 struct nfs4_lock_state *lsp;
5ae67c4f 6183 struct nfs_server *server;
cf470c3e 6184 struct nfs_release_lockowner_args args;
b7e63a10 6185 struct nfs_release_lockowner_res res;
60ea6812 6186 unsigned long timestamp;
cf470c3e
TM		 6187};
6188
fbd4bfd1
CL		 6189static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6190{
6191 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6192 struct nfs_server *server = data->server;
cb04ad2a
PT		 6193 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6194 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6195 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6196 data->timestamp = jiffies;
fbd4bfd1
CL		 6197}
6198
6199static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6200{
6201 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6202 struct nfs_server *server = data->server;
6203
b7e63a10 6204 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6205
6206 switch (task->tk_status) {
6207 case 0:
6208 renew_lease(server, data->timestamp);
6209 break;
6210 case -NFS4ERR_STALE_CLIENTID:
6211 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6212 nfs4_schedule_lease_recovery(server->nfs_client);
6213 break;
60ea6812
CL		 6214 case -NFS4ERR_LEASE_MOVED:
6215 case -NFS4ERR_DELAY:
8478eaa1
N		 6216 if (nfs4_async_handle_error(task, server,
6217 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6218 rpc_restart_call_prepare(task);
6219 }
fbd4bfd1
CL		 6220}
6221
d3c7b7cc
TM		 6222static void nfs4_release_lockowner_release(void *calldata)
6223{
cf470c3e 6224 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6225 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6226 kfree(calldata);
6227}
6228
17280175 6229static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6230 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6231 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6232 .rpc_release = nfs4_release_lockowner_release,
6233};
6234
f1cdae87
JL		 6235static void
6236nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6237{
cf470c3e 6238 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6239 struct rpc_message msg = {
6240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6241 };
6242
6243 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6244 return;
fbd4bfd1 6245
cf470c3e
TM		 6246 data = kmalloc(sizeof(*data), GFP_NOFS);
6247 if (!data)
f1cdae87 6248 return;
cf470c3e 6249 data->lsp = lsp;
5ae67c4f 6250 data->server = server;
cf470c3e
TM		 6251 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6252 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6253 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6254
cf470c3e 6255 msg.rpc_argp = &data->args;
b7e63a10
TM		 6256 msg.rpc_resp = &data->res;
6257 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6258 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6259}
6260
aa1870af
BF		 6261#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6262
64c2ce8b
AK		 6263static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6264 const void *buf, size_t buflen,
6265 int flags, int type)
6b3b5496 6266{
64c2ce8b
AK		 6267 if (strcmp(key, "") != 0)
6268 return -EINVAL;
4b580ee3 6269
2b0143b5 6270 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6271}
6272
64c2ce8b
AK		 6273static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6274 void *buf, size_t buflen, int type)
6b3b5496 6275{
64c2ce8b
AK		 6276 if (strcmp(key, "") != 0)
6277 return -EINVAL;
aa1870af 6278
2b0143b5 6279 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6280}
6281
64c2ce8b
AK		 6282static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6283 size_t list_len, const char *name,
6284 size_t name_len, int type)
6b3b5496 6285{
64c2ce8b 6286 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6287
2b0143b5 6288 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6289 return 0;
64c2ce8b
AK		 6290
6291 if (list && len <= list_len)
6292 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6293 return len;
6b3b5496
BF		 6294}
6295
c9bccef6
DQ		 6296#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6297static inline int nfs4_server_supports_labels(struct nfs_server *server)
6298{
6299 return server->caps & NFS_CAP_SECURITY_LABEL;
6300}
6301
6302static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6303 const void *buf, size_t buflen,
6304 int flags, int type)
6305{
6306 if (security_ismaclabel(key))
6307 return nfs4_set_security_label(dentry, buf, buflen);
6308
6309 return -EOPNOTSUPP;
6310}
6311
6312static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6313 void *buf, size_t buflen, int type)
6314{
6315 if (security_ismaclabel(key))
2b0143b5 6316 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6317 return -EOPNOTSUPP;
6318}
6319
6320static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6321 size_t list_len, const char *name,
6322 size_t name_len, int type)
6323{
6324 size_t len = 0;
6325
2b0143b5
DH		 6326 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6327 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6328 if (list && len <= list_len)
2b0143b5 6329 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6330 }
6331 return len;
6332}
6333
6334static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6335 .prefix = XATTR_SECURITY_PREFIX,
6336 .list = nfs4_xattr_list_nfs4_label,
6337 .get = nfs4_xattr_get_nfs4_label,
6338 .set = nfs4_xattr_set_nfs4_label,
6339};
6340#endif
6341
6342
533eb461
AA		 6343/*
6344 * nfs_fhget will use either the mounted_on_fileid or the fileid
6345 */
69aaaae1
TM		 6346static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6347{
533eb461
AA		 6348 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6349 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6350 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6351 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6352 return;
6353
6354 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6355 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6356 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6357 fattr->nlink = 2;
6358}
6359
f05d147f
BS		 6360static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6361 const struct qstr *name,
6362 struct nfs4_fs_locations *fs_locations,
6363 struct page *page)
683b57b4
TM		 6364{
6365 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6366 u32 bitmask[3] = {
361e624f 6367 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6368 };
6369 struct nfs4_fs_locations_arg args = {
6370 .dir_fh = NFS_FH(dir),
c228fd3a 6371 .name = name,
683b57b4
TM		 6372 .page = page,
6373 .bitmask = bitmask,
6374 };
22958463
BH		 6375 struct nfs4_fs_locations_res res = {
6376 .fs_locations = fs_locations,
6377 };
683b57b4
TM		 6378 struct rpc_message msg = {
6379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6380 .rpc_argp = &args,
22958463 6381 .rpc_resp = &res,
683b57b4
TM		 6382 };
6383 int status;
6384
3110ff80 6385 dprintk("%s: start\n", __func__);
533eb461
AA		 6386
6387 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6388 * is not supported */
6389 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6390 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6391 else
6392 bitmask[0] |= FATTR4_WORD0_FILEID;
6393
c228fd3a 6394 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6395 fs_locations->server = server;
830b8e33 6396 fs_locations->nlocations = 0;
f05d147f 6397 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6398 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6399 return status;
6400}
6401
f05d147f
BS		 6402int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6403 const struct qstr *name,
6404 struct nfs4_fs_locations *fs_locations,
6405 struct page *page)
db0a9593
BS		 6406{
6407 struct nfs4_exception exception = { };
6408 int err;
6409 do {
078ea3df
TM		 6410 err = _nfs4_proc_fs_locations(client, dir, name,
6411 fs_locations, page);
6412 trace_nfs4_get_fs_locations(dir, name, err);
6413 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6414 &exception);
6415 } while (exception.retry);
6416 return err;
6417}
6418
b03d735b
CL		 6419/*
6420 * This operation also signals the server that this client is
6421 * performing migration recovery. The server can stop returning
6422 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6423 * appended to this compound to identify the client ID which is
6424 * performing recovery.
6425 */
6426static int _nfs40_proc_get_locations(struct inode *inode,
6427 struct nfs4_fs_locations *locations,
6428 struct page *page, struct rpc_cred *cred)
6429{
6430 struct nfs_server *server = NFS_SERVER(inode);
6431 struct rpc_clnt *clnt = server->client;
6432 u32 bitmask[2] = {
6433 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6434 };
6435 struct nfs4_fs_locations_arg args = {
6436 .clientid = server->nfs_client->cl_clientid,
6437 .fh = NFS_FH(inode),
6438 .page = page,
6439 .bitmask = bitmask,
6440 .migration = 1, /* skip LOOKUP */
6441 .renew = 1, /* append RENEW */
6442 };
6443 struct nfs4_fs_locations_res res = {
6444 .fs_locations = locations,
6445 .migration = 1,
6446 .renew = 1,
6447 };
6448 struct rpc_message msg = {
6449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6450 .rpc_argp = &args,
6451 .rpc_resp = &res,
6452 .rpc_cred = cred,
6453 };
6454 unsigned long now = jiffies;
6455 int status;
6456
6457 nfs_fattr_init(&locations->fattr);
6458 locations->server = server;
6459 locations->nlocations = 0;
6460
6461 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6462 nfs4_set_sequence_privileged(&args.seq_args);
6463 status = nfs4_call_sync_sequence(clnt, server, &msg,
6464 &args.seq_args, &res.seq_res);
6465 if (status)
6466 return status;
6467
6468 renew_lease(server, now);
6469 return 0;
6470}
6471
6472#ifdef CONFIG_NFS_V4_1
6473
6474/*
6475 * This operation also signals the server that this client is
6476 * performing migration recovery. The server can stop asserting
6477 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6478 * performing this operation is identified in the SEQUENCE
6479 * operation in this compound.
6480 *
6481 * When the client supports GETATTR(fs_locations_info), it can
6482 * be plumbed in here.
6483 */
6484static int _nfs41_proc_get_locations(struct inode *inode,
6485 struct nfs4_fs_locations *locations,
6486 struct page *page, struct rpc_cred *cred)
6487{
6488 struct nfs_server *server = NFS_SERVER(inode);
6489 struct rpc_clnt *clnt = server->client;
6490 u32 bitmask[2] = {
6491 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6492 };
6493 struct nfs4_fs_locations_arg args = {
6494 .fh = NFS_FH(inode),
6495 .page = page,
6496 .bitmask = bitmask,
6497 .migration = 1, /* skip LOOKUP */
6498 };
6499 struct nfs4_fs_locations_res res = {
6500 .fs_locations = locations,
6501 .migration = 1,
6502 };
6503 struct rpc_message msg = {
6504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6505 .rpc_argp = &args,
6506 .rpc_resp = &res,
6507 .rpc_cred = cred,
6508 };
6509 int status;
6510
6511 nfs_fattr_init(&locations->fattr);
6512 locations->server = server;
6513 locations->nlocations = 0;
6514
6515 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6516 nfs4_set_sequence_privileged(&args.seq_args);
6517 status = nfs4_call_sync_sequence(clnt, server, &msg,
6518 &args.seq_args, &res.seq_res);
6519 if (status == NFS4_OK &&
6520 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6521 status = -NFS4ERR_LEASE_MOVED;
6522 return status;
6523}
6524
6525#endif /* CONFIG_NFS_V4_1 */
6526
6527/**
6528 * nfs4_proc_get_locations - discover locations for a migrated FSID
6529 * @inode: inode on FSID that is migrating
6530 * @locations: result of query
6531 * @page: buffer
6532 * @cred: credential to use for this operation
6533 *
6534 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6535 * operation failed, or a negative errno if a local error occurred.
6536 *
6537 * On success, "locations" is filled in, but if the server has
6538 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6539 * asserted.
6540 *
6541 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6542 * from this client that require migration recovery.
6543 */
6544int nfs4_proc_get_locations(struct inode *inode,
6545 struct nfs4_fs_locations *locations,
6546 struct page *page, struct rpc_cred *cred)
6547{
6548 struct nfs_server *server = NFS_SERVER(inode);
6549 struct nfs_client *clp = server->nfs_client;
6550 const struct nfs4_mig_recovery_ops *ops =
6551 clp->cl_mvops->mig_recovery_ops;
6552 struct nfs4_exception exception = { };
6553 int status;
6554
6555 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6556 (unsigned long long)server->fsid.major,
6557 (unsigned long long)server->fsid.minor,
6558 clp->cl_hostname);
6559 nfs_display_fhandle(NFS_FH(inode), __func__);
6560
6561 do {
6562 status = ops->get_locations(inode, locations, page, cred);
6563 if (status != -NFS4ERR_DELAY)
6564 break;
6565 nfs4_handle_exception(server, status, &exception);
6566 } while (exception.retry);
6567 return status;
6568}
6569
44c99933
CL		 6570/*
6571 * This operation also signals the server that this client is
6572 * performing "lease moved" recovery. The server can stop
6573 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6574 * is appended to this compound to identify the client ID which is
6575 * performing recovery.
6576 */
6577static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6578{
6579 struct nfs_server *server = NFS_SERVER(inode);
6580 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6581 struct rpc_clnt *clnt = server->client;
6582 struct nfs4_fsid_present_arg args = {
6583 .fh = NFS_FH(inode),
6584 .clientid = clp->cl_clientid,
6585 .renew = 1, /* append RENEW */
6586 };
6587 struct nfs4_fsid_present_res res = {
6588 .renew = 1,
6589 };
6590 struct rpc_message msg = {
6591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6592 .rpc_argp = &args,
6593 .rpc_resp = &res,
6594 .rpc_cred = cred,
6595 };
6596 unsigned long now = jiffies;
6597 int status;
6598
6599 res.fh = nfs_alloc_fhandle();
6600 if (res.fh == NULL)
6601 return -ENOMEM;
6602
6603 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6604 nfs4_set_sequence_privileged(&args.seq_args);
6605 status = nfs4_call_sync_sequence(clnt, server, &msg,
6606 &args.seq_args, &res.seq_res);
6607 nfs_free_fhandle(res.fh);
6608 if (status)
6609 return status;
6610
6611 do_renew_lease(clp, now);
6612 return 0;
6613}
6614
6615#ifdef CONFIG_NFS_V4_1
6616
6617/*
6618 * This operation also signals the server that this client is
6619 * performing "lease moved" recovery. The server can stop asserting
6620 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6621 * this operation is identified in the SEQUENCE operation in this
6622 * compound.
6623 */
6624static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6625{
6626 struct nfs_server *server = NFS_SERVER(inode);
6627 struct rpc_clnt *clnt = server->client;
6628 struct nfs4_fsid_present_arg args = {
6629 .fh = NFS_FH(inode),
6630 };
6631 struct nfs4_fsid_present_res res = {
6632 };
6633 struct rpc_message msg = {
6634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6635 .rpc_argp = &args,
6636 .rpc_resp = &res,
6637 .rpc_cred = cred,
6638 };
6639 int status;
6640
6641 res.fh = nfs_alloc_fhandle();
6642 if (res.fh == NULL)
6643 return -ENOMEM;
6644
6645 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6646 nfs4_set_sequence_privileged(&args.seq_args);
6647 status = nfs4_call_sync_sequence(clnt, server, &msg,
6648 &args.seq_args, &res.seq_res);
6649 nfs_free_fhandle(res.fh);
6650 if (status == NFS4_OK &&
6651 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6652 status = -NFS4ERR_LEASE_MOVED;
6653 return status;
6654}
6655
6656#endif /* CONFIG_NFS_V4_1 */
6657
6658/**
6659 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6660 * @inode: inode on FSID to check
6661 * @cred: credential to use for this operation
6662 *
6663 * Server indicates whether the FSID is present, moved, or not
6664 * recognized. This operation is necessary to clear a LEASE_MOVED
6665 * condition for this client ID.
6666 *
6667 * Returns NFS4_OK if the FSID is present on this server,
6668 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6669 * NFS4ERR code if some error occurred on the server, or a
6670 * negative errno if a local failure occurred.
6671 */
6672int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6673{
6674 struct nfs_server *server = NFS_SERVER(inode);
6675 struct nfs_client *clp = server->nfs_client;
6676 const struct nfs4_mig_recovery_ops *ops =
6677 clp->cl_mvops->mig_recovery_ops;
6678 struct nfs4_exception exception = { };
6679 int status;
6680
6681 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6682 (unsigned long long)server->fsid.major,
6683 (unsigned long long)server->fsid.minor,
6684 clp->cl_hostname);
6685 nfs_display_fhandle(NFS_FH(inode), __func__);
6686
6687 do {
6688 status = ops->fsid_present(inode, cred);
6689 if (status != -NFS4ERR_DELAY)
6690 break;
6691 nfs4_handle_exception(server, status, &exception);
6692 } while (exception.retry);
6693 return status;
6694}
6695
5ec16a85 6696/**
a5250def
WAA		 6697 * If 'use_integrity' is true and the state managment nfs_client
6698 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6699 * and the machine credential as per RFC3530bis and RFC5661 Security
6700 * Considerations sections. Otherwise, just use the user cred with the
6701 * filesystem's rpc_client.
5ec16a85 6702 */
a5250def 6703static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6704{
6705 int status;
6706 struct nfs4_secinfo_arg args = {
6707 .dir_fh = NFS_FH(dir),
6708 .name = name,
6709 };
6710 struct nfs4_secinfo_res res = {
6711 .flavors = flavors,
6712 };
6713 struct rpc_message msg = {
6714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6715 .rpc_argp = &args,
6716 .rpc_resp = &res,
6717 };
a5250def 6718 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6719 struct rpc_cred *cred = NULL;
a5250def
WAA		 6720
6721 if (use_integrity) {
6722 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6723 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6724 msg.rpc_cred = cred;
a5250def 6725 }
5a5ea0d4
BS		 6726
6727 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6728
6729 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6730 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6731
a5250def
WAA		 6732 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6733 &res.seq_res, 0);
5a5ea0d4 6734 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6735
7cb852df
WAA		 6736 if (cred)
6737 put_rpccred(cred);
a5250def 6738
5a5ea0d4
BS		 6739 return status;
6740}
6741
72de53ec
BS		 6742int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6743 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6744{
6745 struct nfs4_exception exception = { };
6746 int err;
6747 do {
a5250def
WAA		 6748 err = -NFS4ERR_WRONGSEC;
6749
6750 /* try to use integrity protection with machine cred */
6751 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6752 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6753
6754 /*
6755 * if unable to use integrity protection, or SECINFO with
6756 * integrity protection returns NFS4ERR_WRONGSEC (which is
6757 * disallowed by spec, but exists in deployed servers) use
6758 * the current filesystem's rpc_client and the user cred.
6759 */
6760 if (err == -NFS4ERR_WRONGSEC)
6761 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6762
078ea3df
TM		 6763 trace_nfs4_secinfo(dir, name, err);
6764 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6765 &exception);
6766 } while (exception.retry);
6767 return err;
6768}
6769
557134a3 6770#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6771/*
6772 * Check the exchange flags returned by the server for invalid flags, having
6773 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6774 * DS flags set.
6775 */
6776static int nfs4_check_cl_exchange_flags(u32 flags)
6777{
6778 if (flags & ~EXCHGID4_FLAG_MASK_R)
6779 goto out_inval;
6780 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6781 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6782 goto out_inval;
6783 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6784 goto out_inval;
6785 return NFS_OK;
6786out_inval:
6787 return -NFS4ERR_INVAL;
6788}
6789
78fe0f41 6790static bool
79d4e1f0
CL		 6791nfs41_same_server_scope(struct nfs41_server_scope *a,
6792 struct nfs41_server_scope *b)
78fe0f41
WAA		 6793{
6794 if (a->server_scope_sz == b->server_scope_sz &&
6795 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6796 return true;
6797
6798 return false;
6799}
6800
7c44f1ae
WAA		 6801/*
6802 * nfs4_proc_bind_conn_to_session()
6803 *
6804 * The 4.1 client currently uses the same TCP connection for the
6805 * fore and backchannel.
6806 */
2cf047c9 6807int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6808{
6809 int status;
71a097c6
TM		 6810 struct nfs41_bind_conn_to_session_args args = {
6811 .client = clp,
6812 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6813 };
7c44f1ae
WAA		 6814 struct nfs41_bind_conn_to_session_res res;
6815 struct rpc_message msg = {
6816 .rpc_proc =
6817 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6818 .rpc_argp = &args,
7c44f1ae 6819 .rpc_resp = &res,
2cf047c9 6820 .rpc_cred = cred,
7c44f1ae
WAA		 6821 };
6822
6823 dprintk("--> %s\n", __func__);
7c44f1ae 6824
71a097c6
TM		 6825 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6826 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6827 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6828
6829 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6830 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6831 if (status == 0) {
71a097c6 6832 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6833 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6834 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6835 status = -EIO;
71a097c6 6836 goto out;
7c44f1ae 6837 }
71a097c6 6838 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6839 dprintk("NFS: %s: Unexpected direction from server\n",
6840 __func__);
6841 status = -EIO;
71a097c6 6842 goto out;
7c44f1ae 6843 }
71a097c6 6844 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6845 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6846 __func__);
6847 status = -EIO;
71a097c6 6848 goto out;
7c44f1ae
WAA		 6849 }
6850 }
7c44f1ae
WAA		 6851out:
6852 dprintk("<-- %s status= %d\n", __func__, status);
6853 return status;
6854}
6855
99fe60d0 6856/*
fa940720
WAA		 6857 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6858 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6859 */
6860static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6861 .how = SP4_MACH_CRED,
6862 .enforce.u.words = {
6863 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6864 1 << (OP_EXCHANGE_ID - 32) |
6865 1 << (OP_CREATE_SESSION - 32) |
6866 1 << (OP_DESTROY_SESSION - 32) |
6867 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6868 },
6869 .allow.u.words = {
6870 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6871 1 << (OP_LOCKU) |
6872 1 << (OP_COMMIT),
8b5bee2e 6873 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6874 1 << (OP_SECINFO_NO_NAME - 32) |
6875 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6876 1 << (OP_FREE_STATEID - 32) |
6877 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6878 }
6879};
6880
6881/*
6882 * Select the state protection mode for client `clp' given the server results
6883 * from exchange_id in `sp'.
99fe60d0 6884 *
2031cd1a
WAA		 6885 * Returns 0 on success, negative errno otherwise.
6886 */
6887static int nfs4_sp4_select_mode(struct nfs_client *clp,
6888 struct nfs41_state_protection *sp)
6889{
6890 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6891 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6892 1 << (OP_EXCHANGE_ID - 32) |
6893 1 << (OP_CREATE_SESSION - 32) |
6894 1 << (OP_DESTROY_SESSION - 32) |
6895 1 << (OP_DESTROY_CLIENTID - 32)
6896 };
6897 unsigned int i;
6898
6899 if (sp->how == SP4_MACH_CRED) {
6900 /* Print state protect result */
6901 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6902 for (i = 0; i <= LAST_NFS4_OP; i++) {
6903 if (test_bit(i, sp->enforce.u.longs))
6904 dfprintk(MOUNT, " enforce op %d\n", i);
6905 if (test_bit(i, sp->allow.u.longs))
6906 dfprintk(MOUNT, " allow op %d\n", i);
6907 }
6908
6909 /* make sure nothing is on enforce list that isn't supported */
6910 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6911 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6912 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6913 return -EINVAL;
6914 }
6915 }
6916
6917 /*
6918 * Minimal mode - state operations are allowed to use machine
6919 * credential. Note this already happens by default, so the
6920 * client doesn't have to do anything more than the negotiation.
6921 *
6922 * NOTE: we don't care if EXCHANGE_ID is in the list -
6923 * we're already using the machine cred for exchange_id
6924 * and will never use a different cred.
6925 */
6926 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6927 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6928 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6929 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6930 dfprintk(MOUNT, "sp4_mach_cred:\n");
6931 dfprintk(MOUNT, " minimal mode enabled\n");
6932 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6933 } else {
6934 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6935 return -EINVAL;
6936 }
fa940720
WAA		 6937
6938 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6939 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6940 dfprintk(MOUNT, " cleanup mode enabled\n");
6941 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6942 }
8b5bee2e
WAA		 6943
6944 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6945 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6946 dfprintk(MOUNT, " secinfo mode enabled\n");
6947 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6948 }
3787d506
WAA		 6949
6950 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6951 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6952 dfprintk(MOUNT, " stateid mode enabled\n");
6953 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6954 }
8c21c62c
WAA		 6955
6956 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6957 dfprintk(MOUNT, " write mode enabled\n");
6958 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6959 }
6960
6961 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6962 dfprintk(MOUNT, " commit mode enabled\n");
6963 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6964 }
2031cd1a
WAA		 6965 }
6966
6967 return 0;
6968}
6969
6970/*
6971 * _nfs4_proc_exchange_id()
6bbb4ae8 6972 *
2031cd1a 6973 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6974 */
2031cd1a
WAA		 6975static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6976 u32 sp4_how)
99fe60d0
BH		 6977{
6978 nfs4_verifier verifier;
6979 struct nfs41_exchange_id_args args = {
cd93710e 6980 .verifier = &verifier,
99fe60d0 6981 .client = clp,
cd3fadec 6982#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6983 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6984 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6985 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6986#else
6987 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6988 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6989#endif
99fe60d0
BH		 6990 };
6991 struct nfs41_exchange_id_res res = {
32b01310 6992 0
99fe60d0
BH		 6993 };
6994 int status;
6995 struct rpc_message msg = {
6996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6997 .rpc_argp = &args,
6998 .rpc_resp = &res,
6999 .rpc_cred = cred,
7000 };
99fe60d0 7001
f092075d 7002 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7003
7004 status = nfs4_init_uniform_client_string(clp);
7005 if (status)
3a6bb738 7006 goto out;
3a6bb738
JL		 7007
7008 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7009 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7010 clp->cl_owner_id);
99fe60d0 7011
acdeb69d 7012 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7013 GFP_NOFS);
acdeb69d 7014 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7015 status = -ENOMEM;
7016 goto out;
7017 }
78fe0f41 7018
79d4e1f0 7019 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7020 GFP_NOFS);
177313f1 7021 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7022 status = -ENOMEM;
acdeb69d 7023 goto out_server_owner;
abe9a6d5 7024 }
78fe0f41 7025
bbafffd2 7026 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7027 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7028 status = -ENOMEM;
7029 goto out_server_scope;
7030 }
7031
2031cd1a
WAA		 7032 switch (sp4_how) {
7033 case SP4_NONE:
7034 args.state_protect.how = SP4_NONE;
7035 break;
7036
7037 case SP4_MACH_CRED:
7038 args.state_protect = nfs4_sp4_mach_cred_request;
7039 break;
7040
7041 default:
7042 /* unsupported! */
7043 WARN_ON_ONCE(1);
7044 status = -EINVAL;
6b55970b 7045 goto out_impl_id;
2031cd1a
WAA		 7046 }
7047
1bd714f2 7048 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7049 trace_nfs4_exchange_id(clp, status);
177313f1 7050 if (status == 0)
32b01310 7051 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7052
2031cd1a
WAA		 7053 if (status == 0)
7054 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7055
acdeb69d 7056 if (status == 0) {
32b01310 7057 clp->cl_clientid = res.clientid;
e11259f9
TM		 7058 clp->cl_exchange_flags = res.flags;
7059 /* Client ID is not confirmed */
7060 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7061 clear_bit(NFS4_SESSION_ESTABLISHED,
7062 &clp->cl_session->session_state);
32b01310 7063 clp->cl_seqid = res.seqid;
e11259f9 7064 }
32b01310 7065
acdeb69d
CL		 7066 kfree(clp->cl_serverowner);
7067 clp->cl_serverowner = res.server_owner;
7068 res.server_owner = NULL;
78fe0f41 7069
7d2ed9ac 7070 /* use the most recent implementation id */
59155546
CL		 7071 kfree(clp->cl_implid);
7072 clp->cl_implid = res.impl_id;
6b55970b 7073 res.impl_id = NULL;
7d2ed9ac 7074
177313f1 7075 if (clp->cl_serverscope != NULL &&
79d4e1f0 7076 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7077 res.server_scope)) {
7078 dprintk("%s: server_scope mismatch detected\n",
7079 __func__);
7080 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7081 kfree(clp->cl_serverscope);
7082 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7083 }
7084
177313f1 7085 if (clp->cl_serverscope == NULL) {
79d4e1f0 7086 clp->cl_serverscope = res.server_scope;
6b55970b 7087 res.server_scope = NULL;
abe9a6d5 7088 }
6b55970b 7089 }
7d2ed9ac 7090
6b55970b
KM		 7091out_impl_id:
7092 kfree(res.impl_id);
7d2ed9ac 7093out_server_scope:
abe9a6d5 7094 kfree(res.server_scope);
6b55970b
KM		 7095out_server_owner:
7096 kfree(res.server_owner);
abe9a6d5 7097out:
177313f1 7098 if (clp->cl_implid != NULL)
6bbb4ae8 7099 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7100 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7101 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7102 clp->cl_implid->date.seconds,
7103 clp->cl_implid->date.nseconds);
6bbb4ae8 7104 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7105 return status;
7106}
7107
2031cd1a
WAA		 7108/*
7109 * nfs4_proc_exchange_id()
7110 *
7111 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7112 *
7113 * Since the clientid has expired, all compounds using sessions
7114 * associated with the stale clientid will be returning
7115 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7116 * be in some phase of session reset.
7117 *
7118 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7119 */
7120int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7121{
7122 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7123 int status;
7124
7125 /* try SP4_MACH_CRED if krb5i/p */
7126 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7127 authflavor == RPC_AUTH_GSS_KRB5P) {
7128 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7129 if (!status)
7130 return 0;
7131 }
7132
7133 /* try SP4_NONE */
7134 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7135}
7136
66245539
TM		 7137static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7138 struct rpc_cred *cred)
7139{
7140 struct rpc_message msg = {
7141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7142 .rpc_argp = clp,
7143 .rpc_cred = cred,
7144 };
7145 int status;
7146
7147 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7148 trace_nfs4_destroy_clientid(clp, status);
66245539 7149 if (status)
02c67525 7150 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7151 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7152 return status;
7153}
7154
7155static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7156 struct rpc_cred *cred)
7157{
7158 unsigned int loop;
7159 int ret;
7160
7161 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7162 ret = _nfs4_proc_destroy_clientid(clp, cred);
7163 switch (ret) {
7164 case -NFS4ERR_DELAY:
7165 case -NFS4ERR_CLIENTID_BUSY:
7166 ssleep(1);
7167 break;
7168 default:
7169 return ret;
7170 }
7171 }
7172 return 0;
7173}
7174
7175int nfs4_destroy_clientid(struct nfs_client *clp)
7176{
7177 struct rpc_cred *cred;
7178 int ret = 0;
7179
7180 if (clp->cl_mvops->minor_version < 1)
7181 goto out;
7182 if (clp->cl_exchange_flags == 0)
7183 goto out;
05f4c350
CL		 7184 if (clp->cl_preserve_clid)
7185 goto out;
73d8bde5 7186 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7187 ret = nfs4_proc_destroy_clientid(clp, cred);
7188 if (cred)
7189 put_rpccred(cred);
7190 switch (ret) {
7191 case 0:
7192 case -NFS4ERR_STALE_CLIENTID:
7193 clp->cl_exchange_flags = 0;
7194 }
7195out:
7196 return ret;
7197}
7198
2050f0cc
AA		 7199struct nfs4_get_lease_time_data {
7200 struct nfs4_get_lease_time_args *args;
7201 struct nfs4_get_lease_time_res *res;
7202 struct nfs_client *clp;
7203};
7204
7205static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7206 void *calldata)
7207{
2050f0cc
AA		 7208 struct nfs4_get_lease_time_data *data =
7209 (struct nfs4_get_lease_time_data *)calldata;
7210
7211 dprintk("--> %s\n", __func__);
7212 /* just setup sequence, do not trigger session recovery
7213 since we're invoked within one */
d9afbd1b
TM		 7214 nfs41_setup_sequence(data->clp->cl_session,
7215 &data->args->la_seq_args,
7216 &data->res->lr_seq_res,
7217 task);
2050f0cc
AA		 7218 dprintk("<-- %s\n", __func__);
7219}
7220
7221/*
7222 * Called from nfs4_state_manager thread for session setup, so don't recover
7223 * from sequence operation or clientid errors.
7224 */
7225static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7226{
7227 struct nfs4_get_lease_time_data *data =
7228 (struct nfs4_get_lease_time_data *)calldata;
7229
7230 dprintk("--> %s\n", __func__);
14516c3a
TM		 7231 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7232 return;
2050f0cc
AA		 7233 switch (task->tk_status) {
7234 case -NFS4ERR_DELAY:
7235 case -NFS4ERR_GRACE:
7236 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7237 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7238 task->tk_status = 0;
a8a4ae3a
AA		 7239 /* fall through */
7240 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7241 rpc_restart_call_prepare(task);
2050f0cc
AA		 7242 return;
7243 }
2050f0cc
AA		 7244 dprintk("<-- %s\n", __func__);
7245}
7246
17280175 7247static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7248 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7249 .rpc_call_done = nfs4_get_lease_time_done,
7250};
7251
7252int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7253{
7254 struct rpc_task *task;
7255 struct nfs4_get_lease_time_args args;
7256 struct nfs4_get_lease_time_res res = {
7257 .lr_fsinfo = fsinfo,
7258 };
7259 struct nfs4_get_lease_time_data data = {
7260 .args = &args,
7261 .res = &res,
7262 .clp = clp,
7263 };
7264 struct rpc_message msg = {
7265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7266 .rpc_argp = &args,
7267 .rpc_resp = &res,
7268 };
7269 struct rpc_task_setup task_setup = {
7270 .rpc_client = clp->cl_rpcclient,
7271 .rpc_message = &msg,
7272 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7273 .callback_data = &data,
7274 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7275 };
7276 int status;
7277
a9c92d6b 7278 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7279 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7280 dprintk("--> %s\n", __func__);
7281 task = rpc_run_task(&task_setup);
7282
7283 if (IS_ERR(task))
7284 status = PTR_ERR(task);
7285 else {
7286 status = task->tk_status;
7287 rpc_put_task(task);
7288 }
7289 dprintk("<-- %s return %d\n", __func__, status);
7290
7291 return status;
7292}
7293
fc931582
AA		 7294/*
7295 * Initialize the values to be used by the client in CREATE_SESSION
7296 * If nfs4_init_session set the fore channel request and response sizes,
7297 * use them.
7298 *
7299 * Set the back channel max_resp_sz_cached to zero to force the client to
7300 * always set csa_cachethis to FALSE because the current implementation
7301 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7302 */
7303static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7304{
18aad3d5
AA		 7305 unsigned int max_rqst_sz, max_resp_sz;
7306
7307 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7308 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7309
fc931582 7310 /* Fore channel attributes */
18aad3d5
AA		 7311 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7312 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7313 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7314 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7315
7316 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7317 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7318 __func__,
7319 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7320 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7321
7322 /* Back channel attributes */
fc931582
AA		 7323 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7324 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7325 args->bc_attrs.max_resp_sz_cached = 0;
7326 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7327 args->bc_attrs.max_reqs = 1;
7328
7329 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7330 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7331 __func__,
7332 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7333 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7334 args->bc_attrs.max_reqs);
7335}
7336
79969dd1
TM		 7337static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7338 struct nfs41_create_session_res *res)
8d35301d 7339{
43c2e885 7340 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7341 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7342
43c2e885
BF		 7343 if (rcvd->max_resp_sz > sent->max_resp_sz)
7344 return -EINVAL;
7345 /*
7346 * Our requested max_ops is the minimum we need; we're not
7347 * prepared to break up compounds into smaller pieces than that.
7348 * So, no point even trying to continue if the server won't
7349 * cooperate:
7350 */
7351 if (rcvd->max_ops < sent->max_ops)
7352 return -EINVAL;
7353 if (rcvd->max_reqs == 0)
7354 return -EINVAL;
b4b9a0c1
VG		 7355 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7356 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7357 return 0;
8d35301d
AA		 7358}
7359
79969dd1
TM		 7360static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7361 struct nfs41_create_session_res *res)
43c2e885
BF		 7362{
7363 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7364 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7365
b1c0df5f
TM		 7366 if (!(res->flags & SESSION4_BACK_CHAN))
7367 goto out;
43c2e885
BF		 7368 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7369 return -EINVAL;
7370 if (rcvd->max_resp_sz < sent->max_resp_sz)
7371 return -EINVAL;
7372 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7373 return -EINVAL;
7374 /* These would render the backchannel useless: */
b4b9a0c1 7375 if (rcvd->max_ops != sent->max_ops)
43c2e885 7376 return -EINVAL;
b4b9a0c1 7377 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7378 return -EINVAL;
b1c0df5f 7379out:
43c2e885
BF		 7380 return 0;
7381}
8d35301d 7382
8d35301d 7383static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7384 struct nfs41_create_session_res *res)
8d35301d 7385{
43c2e885 7386 int ret;
8d35301d 7387
79969dd1 7388 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7389 if (ret)
7390 return ret;
79969dd1
TM		 7391 return nfs4_verify_back_channel_attrs(args, res);
7392}
7393
7394static void nfs4_update_session(struct nfs4_session *session,
7395 struct nfs41_create_session_res *res)
7396{
7397 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7398 /* Mark client id and session as being confirmed */
7399 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7400 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7401 session->flags = res->flags;
7402 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7403 if (res->flags & SESSION4_BACK_CHAN)
7404 memcpy(&session->bc_attrs, &res->bc_attrs,
7405 sizeof(session->bc_attrs));
8d35301d
AA		 7406}
7407
848f5bda
TM		 7408static int _nfs4_proc_create_session(struct nfs_client *clp,
7409 struct rpc_cred *cred)
fc931582
AA		 7410{
7411 struct nfs4_session *session = clp->cl_session;
7412 struct nfs41_create_session_args args = {
7413 .client = clp,
79969dd1
TM		 7414 .clientid = clp->cl_clientid,
7415 .seqid = clp->cl_seqid,
fc931582
AA		 7416 .cb_program = NFS4_CALLBACK,
7417 };
79969dd1
TM		 7418 struct nfs41_create_session_res res;
7419
fc931582
AA		 7420 struct rpc_message msg = {
7421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7422 .rpc_argp = &args,
7423 .rpc_resp = &res,
848f5bda 7424 .rpc_cred = cred,
fc931582
AA		 7425 };
7426 int status;
7427
7428 nfs4_init_channel_attrs(&args);
0f91421e 7429 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7430
1bd714f2 7431 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7432 trace_nfs4_create_session(clp, status);
fc931582 7433
43095d39 7434 if (!status) {
8d35301d 7435 /* Verify the session's negotiated channel_attrs values */
79969dd1 7436 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7437 /* Increment the clientid slot sequence id */
79969dd1
TM		 7438 if (clp->cl_seqid == res.seqid)
7439 clp->cl_seqid++;
7440 if (status)
7441 goto out;
7442 nfs4_update_session(session, &res);
fc931582 7443 }
79969dd1 7444out:
fc931582
AA		 7445 return status;
7446}
7447
7448/*
7449 * Issues a CREATE_SESSION operation to the server.
7450 * It is the responsibility of the caller to verify the session is
7451 * expired before calling this routine.
7452 */
848f5bda 7453int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7454{
7455 int status;
7456 unsigned *ptr;
fc931582
AA		 7457 struct nfs4_session *session = clp->cl_session;
7458
7459 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7460
848f5bda 7461 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7462 if (status)
7463 goto out;
7464
aacd5537
AA		 7465 /* Init or reset the session slot tables */
7466 status = nfs4_setup_session_slot_tables(session);
7467 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7468 if (status)
7469 goto out;
7470
7471 ptr = (unsigned *)&session->sess_id.data[0];
7472 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7473 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7474out:
7475 dprintk("<-- %s\n", __func__);
7476 return status;
7477}
7478
0f3e66c6
AA		 7479/*
7480 * Issue the over-the-wire RPC DESTROY_SESSION.
7481 * The caller must serialize access to this routine.
7482 */
848f5bda
TM		 7483int nfs4_proc_destroy_session(struct nfs4_session *session,
7484 struct rpc_cred *cred)
0f3e66c6 7485{
848f5bda
TM		 7486 struct rpc_message msg = {
7487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7488 .rpc_argp = session,
7489 .rpc_cred = cred,
7490 };
0f3e66c6 7491 int status = 0;
0f3e66c6
AA		 7492
7493 dprintk("--> nfs4_proc_destroy_session\n");
7494
7495 /* session is still being setup */
e11259f9
TM		 7496 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7497 return 0;
0f3e66c6 7498
1bd714f2 7499 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7500 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7501
7502 if (status)
08106ac7 7503 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7504 "Session has been destroyed regardless...\n", status);
7505
7506 dprintk("<-- nfs4_proc_destroy_session\n");
7507 return status;
7508}
7509
fc01cea9
AA		 7510/*
7511 * Renew the cl_session lease.
7512 */
d5f8d3fe
TM		 7513struct nfs4_sequence_data {
7514 struct nfs_client *clp;
7515 struct nfs4_sequence_args args;
7516 struct nfs4_sequence_res res;
7517};
7518
dc96aef9
AB		 7519static void nfs41_sequence_release(void *data)
7520{
d5f8d3fe
TM		 7521 struct nfs4_sequence_data *calldata = data;
7522 struct nfs_client *clp = calldata->clp;
dc96aef9 7523
7135840f
AB		 7524 if (atomic_read(&clp->cl_count) > 1)
7525 nfs4_schedule_state_renewal(clp);
7526 nfs_put_client(clp);
d5f8d3fe 7527 kfree(calldata);
dc96aef9
AB		 7528}
7529
aa5190d0
TM		 7530static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7531{
7532 switch(task->tk_status) {
7533 case -NFS4ERR_DELAY:
aa5190d0
TM		 7534 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7535 return -EAGAIN;
7536 default:
0400a6b0 7537 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7538 }
7539 return 0;
7540}
7541
dc96aef9 7542static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7543{
d5f8d3fe
TM		 7544 struct nfs4_sequence_data *calldata = data;
7545 struct nfs_client *clp = calldata->clp;
fc01cea9 7546
14516c3a
TM		 7547 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7548 return;
fc01cea9 7549
c6d01c6f 7550 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7551 if (task->tk_status < 0) {
7552 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7553 if (atomic_read(&clp->cl_count) == 1)
7554 goto out;
fc01cea9 7555
aa5190d0
TM		 7556 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7557 rpc_restart_call_prepare(task);
fc01cea9
AA		 7558 return;
7559 }
7560 }
fc01cea9 7561 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7562out:
fc01cea9
AA		 7563 dprintk("<-- %s\n", __func__);
7564}
7565
7566static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7567{
d5f8d3fe
TM		 7568 struct nfs4_sequence_data *calldata = data;
7569 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7570 struct nfs4_sequence_args *args;
7571 struct nfs4_sequence_res *res;
7572
fc01cea9
AA		 7573 args = task->tk_msg.rpc_argp;
7574 res = task->tk_msg.rpc_resp;
7575
d9afbd1b 7576 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7577}
7578
7579static const struct rpc_call_ops nfs41_sequence_ops = {
7580 .rpc_call_done = nfs41_sequence_call_done,
7581 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7582 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7583};
7584
8fe72bac
TM		 7585static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7586 struct rpc_cred *cred,
7587 bool is_privileged)
fc01cea9 7588{
d5f8d3fe 7589 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7590 struct rpc_message msg = {
7591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7592 .rpc_cred = cred,
7593 };
71ac6da9
TM		 7594 struct rpc_task_setup task_setup_data = {
7595 .rpc_client = clp->cl_rpcclient,
7596 .rpc_message = &msg,
8fe72bac 7597 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7598 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7599 };
fc01cea9 7600
7135840f 7601 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7602 return ERR_PTR(-EIO);
dfb4f309 7603 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7604 if (calldata == NULL) {
7135840f 7605 nfs_put_client(clp);
71ac6da9 7606 return ERR_PTR(-ENOMEM);
fc01cea9 7607 }
a9c92d6b 7608 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7609 if (is_privileged)
7610 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7611 msg.rpc_argp = &calldata->args;
7612 msg.rpc_resp = &calldata->res;
7613 calldata->clp = clp;
71ac6da9 7614 task_setup_data.callback_data = calldata;
fc01cea9 7615
71ac6da9
TM		 7616 return rpc_run_task(&task_setup_data);
7617}
7618
2f60ea6b 7619static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7620{
7621 struct rpc_task *task;
7622 int ret = 0;
7623
2f60ea6b 7624 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7625 return -EAGAIN;
8fe72bac 7626 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7627 if (IS_ERR(task))
7628 ret = PTR_ERR(task);
7629 else
bf294b41 7630 rpc_put_task_async(task);
71ac6da9
TM		 7631 dprintk("<-- %s status=%d\n", __func__, ret);
7632 return ret;
7633}
7634
7635static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7636{
7637 struct rpc_task *task;
7638 int ret;
7639
8fe72bac 7640 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7641 if (IS_ERR(task)) {
7642 ret = PTR_ERR(task);
7643 goto out;
7644 }
7645 ret = rpc_wait_for_completion_task(task);
be824167 7646 if (!ret)
71ac6da9
TM		 7647 ret = task->tk_status;
7648 rpc_put_task(task);
7649out:
7650 dprintk("<-- %s status=%d\n", __func__, ret);
7651 return ret;
fc01cea9
AA		 7652}
7653
fce5c838
RL		 7654struct nfs4_reclaim_complete_data {
7655 struct nfs_client *clp;
7656 struct nfs41_reclaim_complete_args arg;
7657 struct nfs41_reclaim_complete_res res;
7658};
7659
7660static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7661{
7662 struct nfs4_reclaim_complete_data *calldata = data;
7663
d9afbd1b
TM		 7664 nfs41_setup_sequence(calldata->clp->cl_session,
7665 &calldata->arg.seq_args,
7666 &calldata->res.seq_res,
7667 task);
fce5c838
RL		 7668}
7669
aa5190d0
TM		 7670static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7671{
7672 switch(task->tk_status) {
7673 case 0:
7674 case -NFS4ERR_COMPLETE_ALREADY:
7675 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7676 break;
7677 case -NFS4ERR_DELAY:
aa5190d0 7678 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7679 /* fall through */
7680 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7681 return -EAGAIN;
7682 default:
0400a6b0 7683 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7684 }
7685 return 0;
7686}
7687
fce5c838
RL		 7688static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7689{
7690 struct nfs4_reclaim_complete_data *calldata = data;
7691 struct nfs_client *clp = calldata->clp;
7692 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7693
7694 dprintk("--> %s\n", __func__);
14516c3a
TM		 7695 if (!nfs41_sequence_done(task, res))
7696 return;
fce5c838 7697
c6d01c6f 7698 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7699 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7700 rpc_restart_call_prepare(task);
7701 return;
7702 }
fce5c838
RL		 7703 dprintk("<-- %s\n", __func__);
7704}
7705
7706static void nfs4_free_reclaim_complete_data(void *data)
7707{
7708 struct nfs4_reclaim_complete_data *calldata = data;
7709
7710 kfree(calldata);
7711}
7712
7713static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7714 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7715 .rpc_call_done = nfs4_reclaim_complete_done,
7716 .rpc_release = nfs4_free_reclaim_complete_data,
7717};
7718
7719/*
7720 * Issue a global reclaim complete.
7721 */
965e9c23
TM		 7722static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7723 struct rpc_cred *cred)
fce5c838
RL		 7724{
7725 struct nfs4_reclaim_complete_data *calldata;
7726 struct rpc_task *task;
7727 struct rpc_message msg = {
7728 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7729 .rpc_cred = cred,
fce5c838
RL		 7730 };
7731 struct rpc_task_setup task_setup_data = {
7732 .rpc_client = clp->cl_rpcclient,
7733 .rpc_message = &msg,
7734 .callback_ops = &nfs4_reclaim_complete_call_ops,
7735 .flags = RPC_TASK_ASYNC,
7736 };
7737 int status = -ENOMEM;
7738
7739 dprintk("--> %s\n", __func__);
8535b2be 7740 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7741 if (calldata == NULL)
7742 goto out;
7743 calldata->clp = clp;
7744 calldata->arg.one_fs = 0;
fce5c838 7745
a9c92d6b 7746 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7747 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7748 msg.rpc_argp = &calldata->arg;
7749 msg.rpc_resp = &calldata->res;
7750 task_setup_data.callback_data = calldata;
7751 task = rpc_run_task(&task_setup_data);
acf82b85 7752 if (IS_ERR(task)) {
fce5c838 7753 status = PTR_ERR(task);
acf82b85
DC		 7754 goto out;
7755 }
c34c32ea
AA		 7756 status = nfs4_wait_for_completion_rpc_task(task);
7757 if (status == 0)
7758 status = task->tk_status;
fce5c838 7759 rpc_put_task(task);
acf82b85 7760 return 0;
fce5c838
RL		 7761out:
7762 dprintk("<-- %s status=%d\n", __func__, status);
7763 return status;
7764}
b1f69b75
AA		 7765
7766static void
7767nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7768{
7769 struct nfs4_layoutget *lgp = calldata;
c31663d4 7770 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7771 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7772
7773 dprintk("--> %s\n", __func__);
c31663d4
FI		 7774 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7775 * right now covering the LAYOUTGET we are about to send.
7776 * However, that is not so catastrophic, and there seems
7777 * to be no way to prevent it completely.
7778 */
6ba7db34 7779 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7780 &lgp->res.seq_res, task))
b1f69b75 7781 return;
cf7d63f1
FI		 7782 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7783 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7784 &lgp->args.range,
cf7d63f1
FI		 7785 lgp->args.ctx->state)) {
7786 rpc_exit(task, NFS4_OK);
cf7d63f1 7787 }
b1f69b75
AA		 7788}
7789
7790static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7791{
7792 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7793 struct inode *inode = lgp->args.inode;
7794 struct nfs_server *server = NFS_SERVER(inode);
7795 struct pnfs_layout_hdr *lo;
7796 struct nfs4_state *state = NULL;
ed7e5423 7797 unsigned long timeo, now, giveup;
b1f69b75 7798
ed7e5423 7799 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7800
6ba7db34 7801 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7802 goto out;
b1f69b75
AA		 7803
7804 switch (task->tk_status) {
7805 case 0:
ee314c2a 7806 goto out;
21b874c8
TM		 7807 /*
7808 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7809 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7810 */
7811 case -NFS4ERR_BADLAYOUT:
7812 goto out_overflow;
ed7e5423
BH		 7813 /*
7814 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7815 * (or clients) writing to the same RAID stripe except when
7816 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7817 */
b1f69b75 7818 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7819 if (lgp->args.minlength == 0)
7820 goto out_overflow;
ed7e5423
BH		 7821 /*
7822 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7823 * existing layout before getting a new one).
7824 */
b1f69b75 7825 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7826 timeo = rpc_get_timeout(task->tk_client);
7827 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7828 now = jiffies;
7829 if (time_after(giveup, now)) {
7830 unsigned long delay;
7831
7832 /* Delay for:
7833 * - Not less then NFS4_POLL_RETRY_MIN.
7834 * - One last time a jiffie before we give up
7835 * - exponential backoff (time_now minus start_attempt)
7836 */
7837 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7838 min((giveup - now - 1),
7839 now - lgp->args.timestamp));
7840
7841 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7842 __func__, delay);
7843 rpc_delay(task, delay);
2259f960
TM		 7844 /* Do not call nfs4_async_handle_error() */
7845 goto out_restart;
ed7e5423 7846 }
ee314c2a
TM		 7847 break;
7848 case -NFS4ERR_EXPIRED:
7849 case -NFS4ERR_BAD_STATEID:
7850 spin_lock(&inode->i_lock);
2259f960
TM		 7851 if (nfs4_stateid_match(&lgp->args.stateid,
7852 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7853 spin_unlock(&inode->i_lock);
7854 /* If the open stateid was bad, then recover it. */
7855 state = lgp->args.ctx->state;
2259f960
TM		 7856 break;
7857 }
7858 lo = NFS_I(inode)->layout;
7859 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7860 &lo->plh_stateid)) {
ee314c2a
TM		 7861 LIST_HEAD(head);
7862
defb8460
CH		 7863 /*
7864 * Mark the bad layout state as invalid, then retry
7865 * with the current stateid.
7866 */
8714d46d 7867 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7868 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7869 spin_unlock(&inode->i_lock);
ee314c2a 7870 pnfs_free_lseg_list(&head);
2259f960
TM		 7871 } else
7872 spin_unlock(&inode->i_lock);
7873 goto out_restart;
b1f69b75 7874 }
8478eaa1 7875 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
2259f960 7876 goto out_restart;
ee314c2a 7877out:
b1f69b75 7878 dprintk("<-- %s\n", __func__);
21b874c8 7879 return;
2259f960
TM		 7880out_restart:
7881 task->tk_status = 0;
7882 rpc_restart_call_prepare(task);
7883 return;
21b874c8
TM		 7884out_overflow:
7885 task->tk_status = -EOVERFLOW;
7886 goto out;
b1f69b75
AA		 7887}
7888
8554116e
IK		 7889static size_t max_response_pages(struct nfs_server *server)
7890{
7891 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7892 return nfs_page_array_len(0, max_resp_sz);
7893}
7894
7895static void nfs4_free_pages(struct page **pages, size_t size)
7896{
7897 int i;
7898
7899 if (!pages)
7900 return;
7901
7902 for (i = 0; i < size; i++) {
7903 if (!pages[i])
7904 break;
7905 __free_page(pages[i]);
7906 }
7907 kfree(pages);
7908}
7909
7910static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7911{
7912 struct page **pages;
7913 int i;
7914
7915 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7916 if (!pages) {
7917 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7918 return NULL;
7919 }
7920
7921 for (i = 0; i < size; i++) {
7922 pages[i] = alloc_page(gfp_flags);
7923 if (!pages[i]) {
7924 dprintk("%s: failed to allocate page\n", __func__);
7925 nfs4_free_pages(pages, size);
7926 return NULL;
7927 }
7928 }
7929
7930 return pages;
7931}
7932
b1f69b75
AA		 7933static void nfs4_layoutget_release(void *calldata)
7934{
7935 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7936 struct inode *inode = lgp->args.inode;
7937 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7938 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7939
7940 dprintk("--> %s\n", __func__);
8554116e 7941 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7942 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7943 put_nfs_open_context(lgp->args.ctx);
7944 kfree(calldata);
7945 dprintk("<-- %s\n", __func__);
7946}
7947
7948static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7949 .rpc_call_prepare = nfs4_layoutget_prepare,
7950 .rpc_call_done = nfs4_layoutget_done,
7951 .rpc_release = nfs4_layoutget_release,
7952};
7953
a0b0a6e3
TM		 7954struct pnfs_layout_segment *
7955nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7956{
a47970ff
WAA		 7957 struct inode *inode = lgp->args.inode;
7958 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7959 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7960 struct rpc_task *task;
7961 struct rpc_message msg = {
7962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7963 .rpc_argp = &lgp->args,
7964 .rpc_resp = &lgp->res,
6ab59344 7965 .rpc_cred = lgp->cred,
b1f69b75
AA		 7966 };
7967 struct rpc_task_setup task_setup_data = {
7968 .rpc_client = server->client,
7969 .rpc_message = &msg,
7970 .callback_ops = &nfs4_layoutget_call_ops,
7971 .callback_data = lgp,
7972 .flags = RPC_TASK_ASYNC,
7973 };
a0b0a6e3 7974 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7975 int status = 0;
7976
7977 dprintk("--> %s\n", __func__);
7978
4bd5a980
PT		 7979 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7980 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7981
8554116e
IK		 7982 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7983 if (!lgp->args.layout.pages) {
7984 nfs4_layoutget_release(lgp);
a0b0a6e3 7985 return ERR_PTR(-ENOMEM);
8554116e
IK		 7986 }
7987 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7988 lgp->args.timestamp = jiffies;
8554116e 7989
35124a09 7990 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7991 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7992 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7993
b1f69b75
AA		 7994 task = rpc_run_task(&task_setup_data);
7995 if (IS_ERR(task))
a0b0a6e3 7996 return ERR_CAST(task);
b1f69b75 7997 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7998 if (status == 0)
7999 status = task->tk_status;
1037e6ea
TM		 8000 trace_nfs4_layoutget(lgp->args.ctx,
8001 &lgp->args.range,
8002 &lgp->res.range,
8003 status);
085b7a45
WAA		 8004 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8005 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8006 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8007 rpc_put_task(task);
8008 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8009 if (status)
8010 return ERR_PTR(status);
8011 return lseg;
b1f69b75
AA		 8012}
8013
cbe82603
BH		 8014static void
8015nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8016{
8017 struct nfs4_layoutreturn *lrp = calldata;
8018
8019 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8020 nfs41_setup_sequence(lrp->clp->cl_session,
8021 &lrp->args.seq_args,
8022 &lrp->res.seq_res,
8023 task);
cbe82603
BH		 8024}
8025
8026static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8027{
8028 struct nfs4_layoutreturn *lrp = calldata;
8029 struct nfs_server *server;
8030
8031 dprintk("--> %s\n", __func__);
8032
6ba7db34 8033 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8034 return;
8035
8036 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8037 switch (task->tk_status) {
8038 default:
8039 task->tk_status = 0;
8040 case 0:
8041 break;
8042 case -NFS4ERR_DELAY:
8478eaa1 8043 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8044 break;
d00c5d43 8045 rpc_restart_call_prepare(task);
cbe82603
BH		 8046 return;
8047 }
cbe82603
BH		 8048 dprintk("<-- %s\n", __func__);
8049}
8050
8051static void nfs4_layoutreturn_release(void *calldata)
8052{
8053 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8054 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8055 LIST_HEAD(freeme);
cbe82603
BH		 8056
8057 dprintk("--> %s\n", __func__);
849b286f
TM		 8058 spin_lock(&lo->plh_inode->i_lock);
8059 if (lrp->res.lrs_present)
8060 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8061 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8062 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8063 lo->plh_block_lgets--;
8064 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8065 pnfs_free_lseg_list(&freeme);
70c3bd2b 8066 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8067 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8068 kfree(calldata);
8069 dprintk("<-- %s\n", __func__);
8070}
8071
8072static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8073 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8074 .rpc_call_done = nfs4_layoutreturn_done,
8075 .rpc_release = nfs4_layoutreturn_release,
8076};
8077
6c16605d 8078int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8079{
8080 struct rpc_task *task;
8081 struct rpc_message msg = {
8082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8083 .rpc_argp = &lrp->args,
8084 .rpc_resp = &lrp->res,
9556000d 8085 .rpc_cred = lrp->cred,
cbe82603
BH		 8086 };
8087 struct rpc_task_setup task_setup_data = {
1771c577 8088 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8089 .rpc_message = &msg,
8090 .callback_ops = &nfs4_layoutreturn_call_ops,
8091 .callback_data = lrp,
8092 };
6c16605d 8093 int status = 0;
cbe82603
BH		 8094
8095 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8096 if (!sync) {
8097 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8098 if (!lrp->inode) {
8099 nfs4_layoutreturn_release(lrp);
8100 return -EAGAIN;
8101 }
8102 task_setup_data.flags |= RPC_TASK_ASYNC;
8103 }
a9c92d6b 8104 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8105 task = rpc_run_task(&task_setup_data);
8106 if (IS_ERR(task))
8107 return PTR_ERR(task);
5a0ec8ac
TM		 8108 if (sync)
8109 status = task->tk_status;
1037e6ea 8110 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8111 dprintk("<-- %s status=%d\n", __func__, status);
8112 rpc_put_task(task);
8113 return status;
8114}
8115
b1f69b75 8116static int
cd5875fe
TM		 8117_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8118 struct pnfs_device *pdev,
8119 struct rpc_cred *cred)
b1f69b75
AA		 8120{
8121 struct nfs4_getdeviceinfo_args args = {
8122 .pdev = pdev,
4e590803
TM		 8123 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8124 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8125 };
8126 struct nfs4_getdeviceinfo_res res = {
8127 .pdev = pdev,
8128 };
8129 struct rpc_message msg = {
8130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8131 .rpc_argp = &args,
8132 .rpc_resp = &res,
cd5875fe 8133 .rpc_cred = cred,
b1f69b75
AA		 8134 };
8135 int status;
8136
8137 dprintk("--> %s\n", __func__);
7c513058 8138 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8139 if (res.notification & ~args.notify_types)
8140 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8141 if (res.notification != args.notify_types)
8142 pdev->nocache = 1;
4e590803 8143
b1f69b75
AA		 8144 dprintk("<-- %s status=%d\n", __func__, status);
8145
8146 return status;
8147}
8148
cd5875fe
TM		 8149int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8150 struct pnfs_device *pdev,
8151 struct rpc_cred *cred)
b1f69b75
AA		 8152{
8153 struct nfs4_exception exception = { };
8154 int err;
8155
8156 do {
8157 err = nfs4_handle_exception(server,
cd5875fe 8158 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8159 &exception);
8160 } while (exception.retry);
8161 return err;
8162}
8163EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8164
863a3c6c
AA		 8165static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8166{
8167 struct nfs4_layoutcommit_data *data = calldata;
8168 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8169 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8170
d9afbd1b
TM		 8171 nfs41_setup_sequence(session,
8172 &data->args.seq_args,
8173 &data->res.seq_res,
8174 task);
863a3c6c
AA		 8175}
8176
8177static void
8178nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8179{
8180 struct nfs4_layoutcommit_data *data = calldata;
8181 struct nfs_server *server = NFS_SERVER(data->args.inode);
8182
6ba7db34 8183 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8184 return;
8185
8186 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8187 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8188 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8189 case -NFS4ERR_BADLAYOUT: /* no layout */
8190 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8191 task->tk_status = 0;
e59d27e0 8192 case 0:
e59d27e0
TM		 8193 break;
8194 default:
8478eaa1 8195 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8196 rpc_restart_call_prepare(task);
8197 return;
8198 }
8199 }
863a3c6c
AA		 8200}
8201
8202static void nfs4_layoutcommit_release(void *calldata)
8203{
8204 struct nfs4_layoutcommit_data *data = calldata;
8205
db29c089 8206 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8207 nfs_post_op_update_inode_force_wcc(data->args.inode,
8208 data->res.fattr);
863a3c6c 8209 put_rpccred(data->cred);
472e2594 8210 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8211 kfree(data);
8212}
8213
8214static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8215 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8216 .rpc_call_done = nfs4_layoutcommit_done,
8217 .rpc_release = nfs4_layoutcommit_release,
8218};
8219
8220int
ef311537 8221nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8222{
8223 struct rpc_message msg = {
8224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8225 .rpc_argp = &data->args,
8226 .rpc_resp = &data->res,
8227 .rpc_cred = data->cred,
8228 };
8229 struct rpc_task_setup task_setup_data = {
8230 .task = &data->task,
8231 .rpc_client = NFS_CLIENT(data->args.inode),
8232 .rpc_message = &msg,
8233 .callback_ops = &nfs4_layoutcommit_ops,
8234 .callback_data = data,
863a3c6c
AA		 8235 };
8236 struct rpc_task *task;
8237 int status = 0;
8238
b4839ebe
KM		 8239 dprintk("NFS: initiating layoutcommit call. sync %d "
8240 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8241 data->args.lastbytewritten,
8242 data->args.inode->i_ino);
8243
472e2594
TM		 8244 if (!sync) {
8245 data->inode = nfs_igrab_and_active(data->args.inode);
8246 if (data->inode == NULL) {
8247 nfs4_layoutcommit_release(data);
8248 return -EAGAIN;
8249 }
8250 task_setup_data.flags = RPC_TASK_ASYNC;
8251 }
a9c92d6b 8252 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8253 task = rpc_run_task(&task_setup_data);
8254 if (IS_ERR(task))
8255 return PTR_ERR(task);
472e2594
TM		 8256 if (sync)
8257 status = task->tk_status;
1037e6ea 8258 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8259 dprintk("%s: status %d\n", __func__, status);
8260 rpc_put_task(task);
8261 return status;
8262}
fca78d6d 8263
97431204
AA		 8264/**
8265 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8266 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8267 */
fca78d6d
BS		 8268static int
8269_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8270 struct nfs_fsinfo *info,
8271 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8272{
8273 struct nfs41_secinfo_no_name_args args = {
8274 .style = SECINFO_STYLE_CURRENT_FH,
8275 };
8276 struct nfs4_secinfo_res res = {
8277 .flavors = flavors,
8278 };
8279 struct rpc_message msg = {
8280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8281 .rpc_argp = &args,
8282 .rpc_resp = &res,
8283 };
b1b3e136 8284 struct rpc_clnt *clnt = server->client;
7cb852df 8285 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8286 int status;
8287
8288 if (use_integrity) {
8289 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8290 cred = nfs4_get_clid_cred(server->nfs_client);
8291 msg.rpc_cred = cred;
b1b3e136
WAA		 8292 }
8293
8294 dprintk("--> %s\n", __func__);
8295 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8296 &res.seq_res, 0);
8297 dprintk("<-- %s status=%d\n", __func__, status);
8298
7cb852df
WAA		 8299 if (cred)
8300 put_rpccred(cred);
b1b3e136
WAA		 8301
8302 return status;
fca78d6d
BS		 8303}
8304
8305static int
8306nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8307 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8308{
8309 struct nfs4_exception exception = { };
8310 int err;
8311 do {
b1b3e136
WAA		 8312 /* first try using integrity protection */
8313 err = -NFS4ERR_WRONGSEC;
8314
8315 /* try to use integrity protection with machine cred */
8316 if (_nfs4_is_integrity_protected(server->nfs_client))
8317 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8318 flavors, true);
8319
8320 /*
8321 * if unable to use integrity protection, or SECINFO with
8322 * integrity protection returns NFS4ERR_WRONGSEC (which is
8323 * disallowed by spec, but exists in deployed servers) use
8324 * the current filesystem's rpc_client and the user cred.
8325 */
8326 if (err == -NFS4ERR_WRONGSEC)
8327 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8328 flavors, false);
8329
fca78d6d
BS		 8330 switch (err) {
8331 case 0:
8332 case -NFS4ERR_WRONGSEC:
78b19bae 8333 case -ENOTSUPP:
05e9cfb4 8334 goto out;
fca78d6d
BS		 8335 default:
8336 err = nfs4_handle_exception(server, err, &exception);
8337 }
8338 } while (exception.retry);
05e9cfb4 8339out:
fca78d6d
BS		 8340 return err;
8341}
8342
8343static int
8344nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8345 struct nfs_fsinfo *info)
8346{
8347 int err;
8348 struct page *page;
367156d9 8349 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8350 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8351 struct nfs4_secinfo4 *secinfo;
8352 int i;
fca78d6d
BS		 8353
8354 page = alloc_page(GFP_KERNEL);
8355 if (!page) {
8356 err = -ENOMEM;
8357 goto out;
8358 }
8359
8360 flavors = page_address(page);
8361 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8362
8363 /*
8364 * Fall back on "guess and check" method if
8365 * the server doesn't support SECINFO_NO_NAME
8366 */
78b19bae 8367 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8368 err = nfs4_find_root_sec(server, fhandle, info);
8369 goto out_freepage;
8370 }
8371 if (err)
8372 goto out_freepage;
8373
58a8cf12
WAA		 8374 for (i = 0; i < flavors->num_flavors; i++) {
8375 secinfo = &flavors->flavors[i];
8376
8377 switch (secinfo->flavor) {
8378 case RPC_AUTH_NULL:
8379 case RPC_AUTH_UNIX:
8380 case RPC_AUTH_GSS:
8381 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8382 &secinfo->flavor_info);
8383 break;
8384 default:
8385 flavor = RPC_AUTH_MAXFLAVOR;
8386 break;
8387 }
8388
4d4b69dd
WAA		 8389 if (!nfs_auth_info_match(&server->auth_info, flavor))
8390 flavor = RPC_AUTH_MAXFLAVOR;
8391
58a8cf12
WAA		 8392 if (flavor != RPC_AUTH_MAXFLAVOR) {
8393 err = nfs4_lookup_root_sec(server, fhandle,
8394 info, flavor);
8395 if (!err)
8396 break;
8397 }
8398 }
8399
8400 if (flavor == RPC_AUTH_MAXFLAVOR)
8401 err = -EPERM;
fca78d6d
BS		 8402
8403out_freepage:
8404 put_page(page);
8405 if (err == -EACCES)
8406 return -EPERM;
8407out:
8408 return err;
8409}
1cab0652 8410
ab7cb0df
TM		 8411static int _nfs41_test_stateid(struct nfs_server *server,
8412 nfs4_stateid *stateid,
8413 struct rpc_cred *cred)
7d974794
BS		 8414{
8415 int status;
8416 struct nfs41_test_stateid_args args = {
1cab0652 8417 .stateid = stateid,
7d974794
BS		 8418 };
8419 struct nfs41_test_stateid_res res;
8420 struct rpc_message msg = {
8421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8422 .rpc_argp = &args,
8423 .rpc_resp = &res,
ab7cb0df 8424 .rpc_cred = cred,
7d974794 8425 };
3787d506
WAA		 8426 struct rpc_clnt *rpc_client = server->client;
8427
8428 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8429 &rpc_client, &msg);
1cab0652 8430
38527b15 8431 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8432 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8433 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8434 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8435 &args.seq_args, &res.seq_res);
38527b15
CL		 8436 if (status != NFS_OK) {
8437 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8438 return status;
38527b15
CL		 8439 }
8440 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8441 return -res.status;
7d974794
BS		 8442}
8443
38527b15
CL		 8444/**
8445 * nfs41_test_stateid - perform a TEST_STATEID operation
8446 *
8447 * @server: server / transport on which to perform the operation
8448 * @stateid: state ID to test
ab7cb0df 8449 * @cred: credential
38527b15
CL		 8450 *
8451 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8452 * Otherwise a negative NFS4ERR value is returned if the operation
8453 * failed or the state ID is not currently valid.
8454 */
ab7cb0df
TM		 8455static int nfs41_test_stateid(struct nfs_server *server,
8456 nfs4_stateid *stateid,
8457 struct rpc_cred *cred)
7d974794
BS		 8458{
8459 struct nfs4_exception exception = { };
8460 int err;
8461 do {
ab7cb0df 8462 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8463 if (err != -NFS4ERR_DELAY)
8464 break;
8465 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8466 } while (exception.retry);
8467 return err;
8468}
9aeda35f 8469
7c1d5fae
TM		 8470struct nfs_free_stateid_data {
8471 struct nfs_server *server;
8472 struct nfs41_free_stateid_args args;
9aeda35f 8473 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8474};
8475
8476static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8477{
8478 struct nfs_free_stateid_data *data = calldata;
8479 nfs41_setup_sequence(nfs4_get_session(data->server),
8480 &data->args.seq_args,
8481 &data->res.seq_res,
8482 task);
8483}
8484
8485static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8486{
8487 struct nfs_free_stateid_data *data = calldata;
8488
8489 nfs41_sequence_done(task, &data->res.seq_res);
8490
8491 switch (task->tk_status) {
8492 case -NFS4ERR_DELAY:
8478eaa1 8493 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8494 rpc_restart_call_prepare(task);
8495 }
8496}
8497
8498static void nfs41_free_stateid_release(void *calldata)
8499{
8500 kfree(calldata);
8501}
8502
17f26b12 8503static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8504 .rpc_call_prepare = nfs41_free_stateid_prepare,
8505 .rpc_call_done = nfs41_free_stateid_done,
8506 .rpc_release = nfs41_free_stateid_release,
8507};
8508
8509static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8510 nfs4_stateid *stateid,
ab7cb0df 8511 struct rpc_cred *cred,
7c1d5fae
TM		 8512 bool privileged)
8513{
9aeda35f
BS		 8514 struct rpc_message msg = {
8515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8516 .rpc_cred = cred,
9aeda35f 8517 };
7c1d5fae
TM		 8518 struct rpc_task_setup task_setup = {
8519 .rpc_client = server->client,
8520 .rpc_message = &msg,
8521 .callback_ops = &nfs41_free_stateid_ops,
8522 .flags = RPC_TASK_ASYNC,
8523 };
8524 struct nfs_free_stateid_data *data;
9aeda35f 8525
3787d506
WAA		 8526 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8527 &task_setup.rpc_client, &msg);
8528
38527b15 8529 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8530 data = kmalloc(sizeof(*data), GFP_NOFS);
8531 if (!data)
8532 return ERR_PTR(-ENOMEM);
8533 data->server = server;
8534 nfs4_stateid_copy(&data->args.stateid, stateid);
8535
8536 task_setup.callback_data = data;
8537
8538 msg.rpc_argp = &data->args;
8539 msg.rpc_resp = &data->res;
a9c92d6b 8540 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8541 if (privileged)
8542 nfs4_set_sequence_privileged(&data->args.seq_args);
8543
8544 return rpc_run_task(&task_setup);
9aeda35f
BS		 8545}
8546
38527b15
CL		 8547/**
8548 * nfs41_free_stateid - perform a FREE_STATEID operation
8549 *
8550 * @server: server / transport on which to perform the operation
8551 * @stateid: state ID to release
ab7cb0df 8552 * @cred: credential
38527b15
CL		 8553 *
8554 * Returns NFS_OK if the server freed "stateid". Otherwise a
8555 * negative NFS4ERR value is returned.
8556 */
ab7cb0df
TM		 8557static int nfs41_free_stateid(struct nfs_server *server,
8558 nfs4_stateid *stateid,
8559 struct rpc_cred *cred)
9aeda35f 8560{
7c1d5fae
TM		 8561 struct rpc_task *task;
8562 int ret;
8563
ab7cb0df 8564 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8565 if (IS_ERR(task))
8566 return PTR_ERR(task);
8567 ret = rpc_wait_for_completion_task(task);
8568 if (!ret)
8569 ret = task->tk_status;
8570 rpc_put_task(task);
8571 return ret;
9aeda35f 8572}
36281caa 8573
f1cdae87
JL		 8574static void
8575nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8576{
8577 struct rpc_task *task;
ab7cb0df 8578 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8579
ab7cb0df 8580 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8581 nfs4_free_lock_state(server, lsp);
8582 if (IS_ERR(task))
f1cdae87 8583 return;
c8b2d0bf 8584 rpc_put_task(task);
c8b2d0bf
TM		 8585}
8586
36281caa
TM		 8587static bool nfs41_match_stateid(const nfs4_stateid *s1,
8588 const nfs4_stateid *s2)
8589{
2d2f24ad 8590 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8591 return false;
8592
2d2f24ad 8593 if (s1->seqid == s2->seqid)
36281caa 8594 return true;
2d2f24ad 8595 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8596 return true;
8597
8598 return false;
8599}
8600
557134a3
AA		 8601#endif /* CONFIG_NFS_V4_1 */
8602
36281caa
TM		 8603static bool nfs4_match_stateid(const nfs4_stateid *s1,
8604 const nfs4_stateid *s2)
8605{
f597c537 8606 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8607}
8608
8609
17280175 8610static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8611 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8612 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8613 .recover_open = nfs4_open_reclaim,
8614 .recover_lock = nfs4_lock_reclaim,
591d71cb 8615 .establish_clid = nfs4_init_clientid,
05f4c350 8616 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8617};
8618
591d71cb 8619#if defined(CONFIG_NFS_V4_1)
17280175 8620static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8621 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8622 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8623 .recover_open = nfs4_open_reclaim,
8624 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8625 .establish_clid = nfs41_init_clientid,
fce5c838 8626 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8627 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8628};
8629#endif /* CONFIG_NFS_V4_1 */
8630
17280175 8631static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8632 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8633 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8634 .recover_open = nfs40_open_expired,
591d71cb
AA		 8635 .recover_lock = nfs4_lock_expired,
8636 .establish_clid = nfs4_init_clientid,
8637};
8638
8639#if defined(CONFIG_NFS_V4_1)
17280175 8640static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8641 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8642 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8643 .recover_open = nfs41_open_expired,
8644 .recover_lock = nfs41_lock_expired,
4d643d1d 8645 .establish_clid = nfs41_init_clientid,
1da177e4 8646};
591d71cb 8647#endif /* CONFIG_NFS_V4_1 */
1da177e4 8648
17280175 8649static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8650 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8651 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8652 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8653};
8654
8655#if defined(CONFIG_NFS_V4_1)
17280175 8656static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8657 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8658 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8659 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8660};
8661#endif
8662
ec011fe8 8663static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8664 .get_locations = _nfs40_proc_get_locations,
44c99933 8665 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8666};
8667
8668#if defined(CONFIG_NFS_V4_1)
8669static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8670 .get_locations = _nfs41_proc_get_locations,
44c99933 8671 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8672};
8673#endif /* CONFIG_NFS_V4_1 */
8674
97dc1359
TM		 8675static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8676 .minor_version = 0,
39c6daae
TM		 8677 .init_caps = NFS_CAP_READDIRPLUS
8678 | NFS_CAP_ATOMIC_OPEN
39c6daae 8679 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8680 .init_client = nfs40_init_client,
8681 .shutdown_client = nfs40_shutdown_client,
36281caa 8682 .match_stateid = nfs4_match_stateid,
fca78d6d 8683 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8684 .free_lock_state = nfs4_release_lockowner,
63f5f796 8685 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8686 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8687 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8688 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8689 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8690 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8691};
8692
8693#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8694static struct nfs_seqid *
8695nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8696{
8697 return NULL;
8698}
8699
97dc1359
TM		 8700static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8701 .minor_version = 1,
39c6daae
TM		 8702 .init_caps = NFS_CAP_READDIRPLUS
8703 | NFS_CAP_ATOMIC_OPEN
3b66486c 8704 | NFS_CAP_POSIX_LOCK
49f9a0fa 8705 | NFS_CAP_STATEID_NFSV41
e983120e 8706 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8707 .init_client = nfs41_init_client,
8708 .shutdown_client = nfs41_shutdown_client,
36281caa 8709 .match_stateid = nfs41_match_stateid,
fca78d6d 8710 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8711 .free_lock_state = nfs41_free_lock_state,
63f5f796 8712 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8713 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8714 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8715 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8716 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8717 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8718};
8719#endif
8720
42c2c424
SD		 8721#if defined(CONFIG_NFS_V4_2)
8722static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8723 .minor_version = 2,
7017310a
BS		 8724 .init_caps = NFS_CAP_READDIRPLUS
8725 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8726 | NFS_CAP_POSIX_LOCK
8727 | NFS_CAP_STATEID_NFSV41
e983120e 8728 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8729 | NFS_CAP_ALLOCATE
624bd5b7 8730 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8731 | NFS_CAP_SEEK
8732 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8733 .init_client = nfs41_init_client,
8734 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8735 .match_stateid = nfs41_match_stateid,
8736 .find_root_sec = nfs41_find_root_sec,
7017310a 8737 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8738 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8739 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8740 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8741 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8742 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8743 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8744};
8745#endif
8746
97dc1359
TM		 8747const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8748 [0] = &nfs_v4_0_minor_ops,
8749#if defined(CONFIG_NFS_V4_1)
8750 [1] = &nfs_v4_1_minor_ops,
8751#endif
42c2c424
SD		 8752#if defined(CONFIG_NFS_V4_2)
8753 [2] = &nfs_v4_2_minor_ops,
8754#endif
97dc1359
TM		 8755};
8756
17f26b12 8757static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8758 .create = nfs_create,
8759 .lookup = nfs_lookup,
8760 .atomic_open = nfs_atomic_open,
8761 .link = nfs_link,
8762 .unlink = nfs_unlink,
8763 .symlink = nfs_symlink,
8764 .mkdir = nfs_mkdir,
8765 .rmdir = nfs_rmdir,
8766 .mknod = nfs_mknod,
8767 .rename = nfs_rename,
8768 .permission = nfs_permission,
8769 .getattr = nfs_getattr,
8770 .setattr = nfs_setattr,
8771 .getxattr = generic_getxattr,
8772 .setxattr = generic_setxattr,
8773 .listxattr = generic_listxattr,
8774 .removexattr = generic_removexattr,
8775};
8776
92e1d5be 8777static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8778 .permission = nfs_permission,
8779 .getattr = nfs_getattr,
8780 .setattr = nfs_setattr,
64c2ce8b
AK		 8781 .getxattr = generic_getxattr,
8782 .setxattr = generic_setxattr,
8783 .listxattr = generic_listxattr,
8784 .removexattr = generic_removexattr,
6b3b5496
BF		 8785};
8786
509de811 8787const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8788 .version = 4, /* protocol version */
8789 .dentry_ops = &nfs4_dentry_operations,
8790 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8791 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8792 .file_ops = &nfs4_file_operations,
1da177e4 8793 .getroot = nfs4_proc_get_root,
281cad46 8794 .submount = nfs4_submount,
ff9099f2 8795 .try_mount = nfs4_try_mount,
1da177e4
LT		 8796 .getattr = nfs4_proc_getattr,
8797 .setattr = nfs4_proc_setattr,
8798 .lookup = nfs4_proc_lookup,
8799 .access = nfs4_proc_access,
8800 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8801 .create = nfs4_proc_create,
8802 .remove = nfs4_proc_remove,
8803 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8804 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8805 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8806 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8807 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8808 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8809 .link = nfs4_proc_link,
8810 .symlink = nfs4_proc_symlink,
8811 .mkdir = nfs4_proc_mkdir,
8812 .rmdir = nfs4_proc_remove,
8813 .readdir = nfs4_proc_readdir,
8814 .mknod = nfs4_proc_mknod,
8815 .statfs = nfs4_proc_statfs,
8816 .fsinfo = nfs4_proc_fsinfo,
8817 .pathconf = nfs4_proc_pathconf,
e9326dca 8818 .set_capabilities = nfs4_server_capabilities,
1da177e4 8819 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8820 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8821 .read_setup = nfs4_proc_read_setup,
ec06c096 8822 .read_done = nfs4_read_done,
1da177e4 8823 .write_setup = nfs4_proc_write_setup,
788e7a89 8824 .write_done = nfs4_write_done,
1da177e4 8825 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8826 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8827 .commit_done = nfs4_commit_done,
1da177e4 8828 .lock = nfs4_proc_lock,
e50a1c2e 8829 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8830 .close_context = nfs4_close_context,
2b484297 8831 .open_context = nfs4_atomic_open,
011e2a7f 8832 .have_delegation = nfs4_have_delegation,
57ec14c5 8833 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8834 .alloc_client = nfs4_alloc_client,
45a52a02 8835 .init_client = nfs4_init_client,
cdb7eced 8836 .free_client = nfs4_free_client,
1179acc6
BS		 8837 .create_server = nfs4_create_server,
8838 .clone_server = nfs_clone_server,
1da177e4
LT		 8839};
8840
64c2ce8b
AK		 8841static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8842 .prefix = XATTR_NAME_NFSV4_ACL,
8843 .list = nfs4_xattr_list_nfs4_acl,
8844 .get = nfs4_xattr_get_nfs4_acl,
8845 .set = nfs4_xattr_set_nfs4_acl,
8846};
8847
8848const struct xattr_handler *nfs4_xattr_handlers[] = {
8849 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8850#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8851 &nfs4_xattr_nfs4_label_handler,
8852#endif
64c2ce8b
AK		 8853 NULL
8854};
8855
1da177e4
LT		 8856/*
8857 * Local variables:
8858 * c-basic-offset: 8
8859 * End:
8860 */
Linux 6.x block layer and io_uring tree(s)