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nfs: take extra reference to fl->fl_file when running a LOCKU operation
[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{
470 do_renew_lease(server->nfs_client, timestamp);
471}
472
2a3eb2b9
CL		 473struct nfs4_call_sync_data {
474 const struct nfs_server *seq_server;
475 struct nfs4_sequence_args *seq_args;
476 struct nfs4_sequence_res *seq_res;
477};
478
be3a5d23
TM		 479void nfs4_init_sequence(struct nfs4_sequence_args *args,
480 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 481{
482 args->sa_slot = NULL;
483 args->sa_cache_this = cache_reply;
484 args->sa_privileged = 0;
485
486 res->sr_slot = NULL;
487}
488
489static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
490{
491 args->sa_privileged = 1;
492}
493
cb04ad2a
PT		 494int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
495 struct nfs4_sequence_args *args,
496 struct nfs4_sequence_res *res,
497 struct rpc_task *task)
3bd2384a 498{
3bd2384a
CL		 499 struct nfs4_slot *slot;
500
501 /* slot already allocated? */
502 if (res->sr_slot != NULL)
503 goto out_start;
504
505 spin_lock(&tbl->slot_tbl_lock);
506 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
507 goto out_sleep;
508
509 slot = nfs4_alloc_slot(tbl);
510 if (IS_ERR(slot)) {
511 if (slot == ERR_PTR(-ENOMEM))
512 task->tk_timeout = HZ >> 2;
513 goto out_sleep;
514 }
515 spin_unlock(&tbl->slot_tbl_lock);
516
517 args->sa_slot = slot;
518 res->sr_slot = slot;
519
520out_start:
521 rpc_call_start(task);
522 return 0;
523
524out_sleep:
525 if (args->sa_privileged)
526 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
527 NULL, RPC_PRIORITY_PRIVILEGED);
528 else
529 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
530 spin_unlock(&tbl->slot_tbl_lock);
531 return -EAGAIN;
532}
cb04ad2a 533EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 534
535static int nfs40_sequence_done(struct rpc_task *task,
536 struct nfs4_sequence_res *res)
537{
538 struct nfs4_slot *slot = res->sr_slot;
539 struct nfs4_slot_table *tbl;
540
cab92c19 541 if (slot == NULL)
3bd2384a
CL		 542 goto out;
543
544 tbl = slot->table;
545 spin_lock(&tbl->slot_tbl_lock);
546 if (!nfs41_wake_and_assign_slot(tbl, slot))
547 nfs4_free_slot(tbl, slot);
548 spin_unlock(&tbl->slot_tbl_lock);
549
550 res->sr_slot = NULL;
551out:
552 return 1;
553}
554
cccef3b9
AA		 555#if defined(CONFIG_NFS_V4_1)
556
d185a334 557static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 558{
e3725ec0 559 struct nfs4_session *session;
13615871 560 struct nfs4_slot_table *tbl;
a13ce7c6 561 struct nfs4_slot *slot = res->sr_slot;
c10e4498 562 bool send_new_highest_used_slotid = false;
13615871 563
a13ce7c6 564 tbl = slot->table;
e3725ec0 565 session = tbl->session;
ea028ac9 566
35dc1d74 567 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 568 /* Be nice to the server: try to ensure that the last transmitted
569 * value for highest_user_slotid <= target_highest_slotid
570 */
571 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
572 send_new_highest_used_slotid = true;
573
a13ce7c6 574 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 575 send_new_highest_used_slotid = false;
576 goto out_unlock;
577 }
a13ce7c6 578 nfs4_free_slot(tbl, slot);
c10e4498
TM		 579
580 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
581 send_new_highest_used_slotid = false;
b75ad4cd 582out_unlock:
35dc1d74 583 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 584 res->sr_slot = NULL;
c10e4498
TM		 585 if (send_new_highest_used_slotid)
586 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 587}
588
f9c96fcc 589int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 590{
e3725ec0 591 struct nfs4_session *session;
a13ce7c6 592 struct nfs4_slot *slot = res->sr_slot;
14516c3a 593 struct nfs_client *clp;
ac20d163 594 bool interrupted = false;
85563073 595 int ret = 1;
b0df806c 596
a13ce7c6
TM		 597 if (slot == NULL)
598 goto out_noaction;
468f8613
BS		 599 /* don't increment the sequence number if the task wasn't sent */
600 if (!RPC_WAS_SENT(task))
b0df806c
AA		 601 goto out;
602
e3725ec0 603 session = slot->table->session;
933602e3 604
ac20d163
TM		 605 if (slot->interrupted) {
606 slot->interrupted = 0;
607 interrupted = true;
608 }
609
2f92ae34 610 trace_nfs4_sequence_done(session, res);
691daf3b 611 /* Check the SEQUENCE operation status */
14516c3a
TM		 612 switch (res->sr_status) {
613 case 0:
b0df806c 614 /* Update the slot's sequence and clientid lease timer */
933602e3 615 ++slot->seq_nr;
e3725ec0 616 clp = session->clp;
8e63b6a8 617 do_renew_lease(clp, res->sr_timestamp);
0629e370 618 /* Check sequence flags */
b4410c2f
TM		 619 if (res->sr_status_flags != 0)
620 nfs4_schedule_lease_recovery(clp);
464ee9f9 621 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 622 break;
ac20d163
TM		 623 case 1:
624 /*
625 * sr_status remains 1 if an RPC level error occurred.
626 * The server may or may not have processed the sequence
627 * operation..
628 * Mark the slot as having hosted an interrupted RPC call.
629 */
630 slot->interrupted = 1;
631 goto out;
14516c3a
TM		 632 case -NFS4ERR_DELAY:
633 /* The server detected a resend of the RPC call and
634 * returned NFS4ERR_DELAY as per Section 2.10.6.2
635 * of RFC5661.
636 */
df2fabff 637 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 638 __func__,
df2fabff 639 slot->slot_nr,
933602e3 640 slot->seq_nr);
14516c3a 641 goto out_retry;
85563073
TM		 642 case -NFS4ERR_BADSLOT:
643 /*
644 * The slot id we used was probably retired. Try again
645 * using a different slot id.
646 */
e8794440
TM		 647 goto retry_nowait;
648 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 649 /*
650 * Was the last operation on this sequence interrupted?
651 * If so, retry after bumping the sequence number.
652 */
653 if (interrupted) {
654 ++slot->seq_nr;
655 goto retry_nowait;
656 }
e8794440
TM		 657 /*
658 * Could this slot have been previously retired?
659 * If so, then the server may be expecting seq_nr = 1!
660 */
8e63b6a8
TM		 661 if (slot->seq_nr != 1) {
662 slot->seq_nr = 1;
663 goto retry_nowait;
664 }
665 break;
e8794440
TM		 666 case -NFS4ERR_SEQ_FALSE_RETRY:
667 ++slot->seq_nr;
668 goto retry_nowait;
14516c3a
TM		 669 default:
670 /* Just update the slot sequence no. */
933602e3 671 ++slot->seq_nr;
b0df806c
AA		 672 }
673out:
674 /* The session may be reset by one of the error handlers. */
675 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 676 nfs41_sequence_free_slot(res);
a13ce7c6 677out_noaction:
85563073 678 return ret;
e8794440
TM		 679retry_nowait:
680 if (rpc_restart_call_prepare(task)) {
681 task->tk_status = 0;
682 ret = 0;
683 }
684 goto out;
14516c3a 685out_retry:
d05dd4e9 686 if (!rpc_restart_call(task))
14516c3a
TM		 687 goto out;
688 rpc_delay(task, NFS4_POLL_RETRY_MAX);
689 return 0;
b0df806c 690}
f9c96fcc 691EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 692
2c4b131d 693int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 694{
e3725ec0 695 if (res->sr_slot == NULL)
14516c3a 696 return 1;
3bd2384a
CL		 697 if (!res->sr_slot->table->session)
698 return nfs40_sequence_done(task, res);
14516c3a 699 return nfs41_sequence_done(task, res);
df896455 700}
2c4b131d 701EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 702
dc70d7b3 703int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 704 struct nfs4_sequence_args *args,
705 struct nfs4_sequence_res *res,
ce5039c1
AA		 706 struct rpc_task *task)
707{
fbcd4abc
AA		 708 struct nfs4_slot *slot;
709 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 710
711 dprintk("--> %s\n", __func__);
ce5039c1 712 /* slot already allocated? */
dfb4f309 713 if (res->sr_slot != NULL)
d9afbd1b 714 goto out_success;
ce5039c1 715
fbcd4abc
AA		 716 tbl = &session->fc_slot_table;
717
69d206b5
TM		 718 task->tk_timeout = 0;
719
fbcd4abc 720 spin_lock(&tbl->slot_tbl_lock);
774d5f14 721 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 722 !args->sa_privileged) {
0b1c8fc4 723 /* The state manager will wait until the slot table is empty */
0b1c8fc4 724 dprintk("%s session is draining\n", __func__);
7b939a3f 725 goto out_sleep;
689cf5c1
AB		 726 }
727
2dc03b7f 728 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 729 if (IS_ERR(slot)) {
730 /* If out of memory, try again in 1/4 second */
731 if (slot == ERR_PTR(-ENOMEM))
732 task->tk_timeout = HZ >> 2;
fbcd4abc 733 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 734 goto out_sleep;
fbcd4abc
AA		 735 }
736 spin_unlock(&tbl->slot_tbl_lock);
737
2b2fa717 738 args->sa_slot = slot;
fbcd4abc 739
e8d92382 740 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 741 slot->slot_nr, slot->seq_nr);
fbcd4abc 742
dfb4f309 743 res->sr_slot = slot;
8e63b6a8 744 res->sr_timestamp = jiffies;
2a6e26cd 745 res->sr_status_flags = 0;
fbcd4abc
AA		 746 /*
747 * sr_status is only set in decode_sequence, and so will remain
748 * set to 1 if an rpc level failure occurs.
749 */
750 res->sr_status = 1;
2f92ae34 751 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 752out_success:
753 rpc_call_start(task);
ce5039c1 754 return 0;
7b939a3f 755out_sleep:
8fe72bac
TM		 756 /* Privileged tasks are queued with top priority */
757 if (args->sa_privileged)
1e1093c7
TM		 758 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
759 NULL, RPC_PRIORITY_PRIVILEGED);
760 else
761 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 762 spin_unlock(&tbl->slot_tbl_lock);
763 return -EAGAIN;
ce5039c1 764}
dc70d7b3 765EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 766
5a580e0a
CL		 767static int nfs4_setup_sequence(const struct nfs_server *server,
768 struct nfs4_sequence_args *args,
769 struct nfs4_sequence_res *res,
770 struct rpc_task *task)
ce5039c1 771{
035168ab 772 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 773 int ret = 0;
774
3bd2384a 775 if (!session)
cb04ad2a
PT		 776 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
777 args, res, task);
035168ab 778
e8d92382 779 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 780 __func__, session->clp, session, res->sr_slot ?
e8d92382 781 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 782
9d12b216 783 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 784
ce5039c1
AA		 785 dprintk("<-- %s status=%d\n", __func__, ret);
786 return ret;
787}
788
ce5039c1
AA		 789static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
790{
2a3eb2b9 791 struct nfs4_call_sync_data *data = calldata;
6ba7db34 792 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 793
035168ab
TM		 794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
795
d9afbd1b 796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 797}
798
69ab40c4
AA		 799static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
800{
2a3eb2b9 801 struct nfs4_call_sync_data *data = calldata;
69ab40c4 802
14516c3a 803 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 804}
805
17280175 806static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 807 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 808 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 809};
810
3bd2384a
CL		 811#else /* !CONFIG_NFS_V4_1 */
812
9915ea7e
CL		 813static int nfs4_setup_sequence(const struct nfs_server *server,
814 struct nfs4_sequence_args *args,
815 struct nfs4_sequence_res *res,
816 struct rpc_task *task)
817{
cb04ad2a
PT		 818 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
819 args, res, task);
9915ea7e
CL		 820}
821
2c4b131d
PT		 822int nfs4_sequence_done(struct rpc_task *task,
823 struct nfs4_sequence_res *res)
9915ea7e 824{
3bd2384a 825 return nfs40_sequence_done(task, res);
9915ea7e 826}
2c4b131d 827EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 828
829#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 830
831static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_setup_sequence(data->seq_server,
835 data->seq_args, data->seq_res, task);
836}
837
838static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
839{
840 struct nfs4_call_sync_data *data = calldata;
841 nfs4_sequence_done(task, data->seq_res);
842}
843
844static const struct rpc_call_ops nfs40_call_sync_ops = {
845 .rpc_call_prepare = nfs40_call_sync_prepare,
846 .rpc_call_done = nfs40_call_sync_done,
847};
848
7c513058
BS		 849static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
850 struct nfs_server *server,
ce5039c1
AA		 851 struct rpc_message *msg,
852 struct nfs4_sequence_args *args,
8fe72bac 853 struct nfs4_sequence_res *res)
ce5039c1
AA		 854{
855 int ret;
856 struct rpc_task *task;
9915ea7e 857 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 858 struct nfs4_call_sync_data data = {
035168ab 859 .seq_server = server,
ce5039c1
AA		 860 .seq_args = args,
861 .seq_res = res,
ce5039c1
AA		 862 };
863 struct rpc_task_setup task_setup = {
7c513058 864 .rpc_client = clnt,
ce5039c1 865 .rpc_message = msg,
9915ea7e 866 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 867 .callback_data = &data
868 };
869
ce5039c1
AA		 870 task = rpc_run_task(&task_setup);
871 if (IS_ERR(task))
872 ret = PTR_ERR(task);
873 else {
874 ret = task->tk_status;
875 rpc_put_task(task);
876 }
877 return ret;
878}
879
7c513058
BS		 880int nfs4_call_sync(struct rpc_clnt *clnt,
881 struct nfs_server *server,
e73b83f2
BS		 882 struct rpc_message *msg,
883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
885 int cache_reply)
886{
a9c92d6b 887 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 888 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 889}
cccef3b9 890
38478b24 891static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 892{
38478b24 893 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 894
38478b24 895 spin_lock(&dir->i_lock);
359d7d1c 896 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 897 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 898 nfs_force_lookup_revalidate(dir);
a9a4a87a 899 dir->i_version = cinfo->after;
3235b403 900 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
6ae37339
TM		 940static u32
941nfs4_map_atomic_open_share(struct nfs_server *server,
942 fmode_t fmode, int openflags)
943{
944 u32 res = 0;
945
946 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
947 case FMODE_READ:
948 res = NFS4_SHARE_ACCESS_READ;
949 break;
950 case FMODE_WRITE:
951 res = NFS4_SHARE_ACCESS_WRITE;
952 break;
953 case FMODE_READ|FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_BOTH;
955 }
956 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
957 goto out;
958 /* Want no delegation if we're using O_DIRECT */
959 if (openflags & O_DIRECT)
960 res |= NFS4_SHARE_WANT_NO_DELEG;
961out:
962 return res;
963}
964
49f9a0fa
TM		 965static enum open_claim_type4
966nfs4_map_atomic_open_claim(struct nfs_server *server,
967 enum open_claim_type4 claim)
968{
969 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
970 return claim;
971 switch (claim) {
972 default:
973 return claim;
974 case NFS4_OPEN_CLAIM_FH:
975 return NFS4_OPEN_CLAIM_NULL;
976 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
977 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
978 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
979 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
980 }
981}
2ced46c2
TM		 982
983static void nfs4_init_opendata_res(struct nfs4_opendata *p)
984{
985 p->o_res.f_attr = &p->f_attr;
1775fd3e 986 p->o_res.f_label = p->f_label;
c1d51931
TM		 987 p->o_res.seqid = p->o_arg.seqid;
988 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 989 p->o_res.server = p->o_arg.server;
5f657530 990 p->o_res.access_request = p->o_arg.access;
2ced46c2 991 nfs_fattr_init(&p->f_attr);
6926afd1 992 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 993}
994
82a2c1b7 995static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 996 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 997 const struct iattr *attrs,
1775fd3e 998 struct nfs4_label *label,
4a1c0893 999 enum open_claim_type4 claim,
8535b2be 1000 gfp_t gfp_mask)
e56e0b78 1001{
82a2c1b7 1002 struct dentry *parent = dget_parent(dentry);
2b0143b5 1003 struct inode *dir = d_inode(parent);
e56e0b78 1004 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1005 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1006 struct nfs4_opendata *p;
1007
8535b2be 1008 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1009 if (p == NULL)
1010 goto err;
14c43f76
DQ		 1011
1012 p->f_label = nfs4_label_alloc(server, gfp_mask);
1013 if (IS_ERR(p->f_label))
1014 goto err_free_p;
1015
63f5f796
TM		 1016 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1017 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1018 if (IS_ERR(p->o_arg.seqid))
14c43f76 1019 goto err_free_label;
82a2c1b7
AV		 1020 nfs_sb_active(dentry->d_sb);
1021 p->dentry = dget(dentry);
e56e0b78
TM		 1022 p->dir = parent;
1023 p->owner = sp;
1024 atomic_inc(&sp->so_count);
dc0b027d
TM		 1025 p->o_arg.open_flags = flags;
1026 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1027 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1028 fmode, flags);
ae2bb032
WAA		 1029 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1030 * will return permission denied for all bits until close */
1031 if (!(flags & O_EXCL)) {
1032 /* ask server to check for all possible rights as results
1033 * are cached */
1034 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1035 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1036 }
7539bbab 1037 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1038 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1039 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1040 p->o_arg.name = &dentry->d_name;
e56e0b78 1041 p->o_arg.server = server;
aa9c2669 1042 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1043 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1044 p->o_arg.label = label;
49f9a0fa
TM		 1045 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1046 switch (p->o_arg.claim) {
4a1c0893
TM		 1047 case NFS4_OPEN_CLAIM_NULL:
1048 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1049 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1050 p->o_arg.fh = NFS_FH(dir);
1051 break;
1052 case NFS4_OPEN_CLAIM_PREVIOUS:
1053 case NFS4_OPEN_CLAIM_FH:
1054 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1055 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1056 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1057 }
536e43d1 1058 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1059 __u32 verf[2];
d77d76ff 1060
e56e0b78
TM		 1061 p->o_arg.u.attrs = &p->attrs;
1062 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1063
1064 verf[0] = jiffies;
1065 verf[1] = current->pid;
1066 memcpy(p->o_arg.u.verifier.data, verf,
1067 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1068 }
cdd4e68b
TM		 1069 p->c_arg.fh = &p->o_res.fh;
1070 p->c_arg.stateid = &p->o_res.stateid;
1071 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1072 nfs4_init_opendata_res(p);
c6d00e63 1073 kref_init(&p->kref);
e56e0b78 1074 return p;
14c43f76
DQ		 1075
1076err_free_label:
1077 nfs4_label_free(p->f_label);
1078err_free_p:
e56e0b78
TM		 1079 kfree(p);
1080err:
1081 dput(parent);
1082 return NULL;
1083}
1084
c6d00e63 1085static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1086{
c6d00e63
TM		 1087 struct nfs4_opendata *p = container_of(kref,
1088 struct nfs4_opendata, kref);
82a2c1b7 1089 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1090
1091 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1092 if (p->state != NULL)
1093 nfs4_put_open_state(p->state);
c6d00e63 1094 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1095
1096 nfs4_label_free(p->f_label);
1097
c6d00e63 1098 dput(p->dir);
82a2c1b7
AV		 1099 dput(p->dentry);
1100 nfs_sb_deactive(sb);
6926afd1 1101 nfs_fattr_free_names(&p->f_attr);
e911b815 1102 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1103 kfree(p);
1104}
1105
1106static void nfs4_opendata_put(struct nfs4_opendata *p)
1107{
1108 if (p != NULL)
1109 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1110}
1111
06f814a3
TM		 1112static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1113{
06f814a3
TM		 1114 int ret;
1115
06f814a3 1116 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1117 return ret;
1118}
1119
dc0b027d 1120static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1121{
1122 int ret = 0;
dc0b027d 1123
536e43d1 1124 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1125 goto out;
1126 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1127 case FMODE_READ:
88069f77
TM		 1128 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1129 && state->n_rdonly != 0;
6ee41268
TM		 1130 break;
1131 case FMODE_WRITE:
88069f77
TM		 1132 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1133 && state->n_wronly != 0;
6ee41268
TM		 1134 break;
1135 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1136 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1137 && state->n_rdwr != 0;
6ee41268 1138 }
dc0b027d 1139out:
6ee41268
TM		 1140 return ret;
1141}
1142
dc0b027d 1143static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1144{
652f89f6
TM		 1145 if (delegation == NULL)
1146 return 0;
dc0b027d 1147 if ((delegation->type & fmode) != fmode)
aac00a8d 1148 return 0;
d25be546
TM		 1149 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1150 return 0;
b7391f44 1151 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1152 return 1;
1153}
1154
dc0b027d 1155static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1156{
dc0b027d 1157 switch (fmode) {
e7616923
TM		 1158 case FMODE_WRITE:
1159 state->n_wronly++;
1160 break;
1161 case FMODE_READ:
1162 state->n_rdonly++;
1163 break;
1164 case FMODE_READ|FMODE_WRITE:
1165 state->n_rdwr++;
1166 }
dc0b027d 1167 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1168}
1169
4f14c194
TM		 1170static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1171{
1172 struct nfs_client *clp = state->owner->so_server->nfs_client;
1173 bool need_recover = false;
1174
1175 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1176 need_recover = true;
1177 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1178 need_recover = true;
1179 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1180 need_recover = true;
1181 if (need_recover)
1182 nfs4_state_mark_reclaim_nograce(clp, state);
1183}
1184
e999e80e
TM		 1185static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1186 nfs4_stateid *stateid)
1187{
1188 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1189 return true;
4f14c194
TM		 1190 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1191 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1192 return true;
4f14c194 1193 }
e999e80e
TM		 1194 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1195 return true;
1196 return false;
1197}
1198
f95549cf
TM		 1199static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1200{
1201 if (state->n_wronly)
1202 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1203 if (state->n_rdonly)
1204 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1205 if (state->n_rdwr)
1206 set_bit(NFS_O_RDWR_STATE, &state->flags);
1207}
1208
226056c5
TM		 1209static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1210 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1211{
226056c5
TM		 1212 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1213 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1214 case FMODE_WRITE:
1215 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1216 break;
1217 case FMODE_READ:
1218 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1219 break;
1220 case 0:
1221 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1222 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1223 clear_bit(NFS_OPEN_STATE, &state->flags);
1224 }
1225 if (stateid == NULL)
1226 return;
f95549cf
TM		 1227 /* Handle races with OPEN */
1228 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1229 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1230 nfs_resync_open_stateid_locked(state);
226056c5 1231 return;
f95549cf 1232 }
003707c7 1233 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1234 nfs4_stateid_copy(&state->stateid, stateid);
1235 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1236}
1237
1238static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1239{
1240 write_seqlock(&state->seqlock);
1241 nfs_clear_open_stateid_locked(state, stateid, fmode);
1242 write_sequnlock(&state->seqlock);
4f14c194
TM		 1243 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1244 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1245}
1246
dc0b027d 1247static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1248{
dc0b027d 1249 switch (fmode) {
003707c7
TM		 1250 case FMODE_READ:
1251 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1252 break;
1253 case FMODE_WRITE:
1254 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1255 break;
1256 case FMODE_READ|FMODE_WRITE:
1257 set_bit(NFS_O_RDWR_STATE, &state->flags);
1258 }
e999e80e
TM		 1259 if (!nfs_need_update_open_stateid(state, stateid))
1260 return;
1261 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1262 nfs4_stateid_copy(&state->stateid, stateid);
1263 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1264}
1265
dc0b027d 1266static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1267{
8bda4e4c
TM		 1268 /*
1269 * Protect the call to nfs4_state_set_mode_locked and
1270 * serialise the stateid update
1271 */
1272 write_seqlock(&state->seqlock);
003707c7 1273 if (deleg_stateid != NULL) {
f597c537 1274 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1275 set_bit(NFS_DELEGATED_STATE, &state->flags);
1276 }
1277 if (open_stateid != NULL)
dc0b027d 1278 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1279 write_sequnlock(&state->seqlock);
1280 spin_lock(&state->owner->so_lock);
dc0b027d 1281 update_open_stateflags(state, fmode);
ec073428 1282 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1283}
1284
dc0b027d 1285static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1286{
1287 struct nfs_inode *nfsi = NFS_I(state->inode);
1288 struct nfs_delegation *deleg_cur;
1289 int ret = 0;
1290
dc0b027d 1291 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1292
1293 rcu_read_lock();
1294 deleg_cur = rcu_dereference(nfsi->delegation);
1295 if (deleg_cur == NULL)
1296 goto no_delegation;
1297
1298 spin_lock(&deleg_cur->lock);
17f26b12 1299 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1300 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1301 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1302 goto no_delegation_unlock;
1303
1304 if (delegation == NULL)
1305 delegation = &deleg_cur->stateid;
f597c537 1306 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1307 goto no_delegation_unlock;
1308
b7391f44 1309 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1310 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1311 ret = 1;
1312no_delegation_unlock:
1313 spin_unlock(&deleg_cur->lock);
1314no_delegation:
1315 rcu_read_unlock();
1316
1317 if (!ret && open_stateid != NULL) {
dc0b027d 1318 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1319 ret = 1;
1320 }
4f14c194
TM		 1321 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1322 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1323
1324 return ret;
1325}
1326
39071e6f
TM		 1327static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1328 const nfs4_stateid *stateid)
1329{
1330 struct nfs4_state *state = lsp->ls_state;
1331 bool ret = false;
1332
1333 spin_lock(&state->state_lock);
1334 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1335 goto out_noupdate;
1336 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1337 goto out_noupdate;
1338 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1339 ret = true;
1340out_noupdate:
1341 spin_unlock(&state->state_lock);
1342 return ret;
1343}
34310430 1344
dc0b027d 1345static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1346{
1347 struct nfs_delegation *delegation;
1348
1349 rcu_read_lock();
1350 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1351 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1352 rcu_read_unlock();
1353 return;
1354 }
1355 rcu_read_unlock();
57ec14c5 1356 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1357}
1358
6ee41268 1359static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1360{
1361 struct nfs4_state *state = opendata->state;
1362 struct nfs_inode *nfsi = NFS_I(state->inode);
1363 struct nfs_delegation *delegation;
f448badd 1364 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1365 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1366 nfs4_stateid stateid;
1367 int ret = -EAGAIN;
1368
aac00a8d 1369 for (;;) {
61beef75 1370 spin_lock(&state->owner->so_lock);
dc0b027d 1371 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1372 update_open_stateflags(state, fmode);
6ee41268 1373 spin_unlock(&state->owner->so_lock);
61beef75 1374 goto out_return_state;
6ee41268 1375 }
61beef75 1376 spin_unlock(&state->owner->so_lock);
34310430
TM		 1377 rcu_read_lock();
1378 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1379 if (!can_open_delegated(delegation, fmode)) {
34310430 1380 rcu_read_unlock();
aac00a8d 1381 break;
34310430 1382 }
aac00a8d 1383 /* Save the delegation */
f597c537 1384 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1385 rcu_read_unlock();
fa332941 1386 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1387 if (!opendata->is_recover) {
1388 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1389 if (ret != 0)
1390 goto out;
1391 }
aac00a8d 1392 ret = -EAGAIN;
34310430
TM		 1393
1394 /* Try to update the stateid using the delegation */
dc0b027d 1395 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1396 goto out_return_state;
aac00a8d 1397 }
aac00a8d
TM		 1398out:
1399 return ERR_PTR(ret);
1400out_return_state:
1401 atomic_inc(&state->count);
1402 return state;
1403}
1404
e23008ec
AA		 1405static void
1406nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1407{
1408 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1409 struct nfs_delegation *delegation;
1410 int delegation_flags = 0;
1411
1412 rcu_read_lock();
1413 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1414 if (delegation)
1415 delegation_flags = delegation->flags;
1416 rcu_read_unlock();
1417 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1418 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1419 "returning a delegation for "
1420 "OPEN(CLAIM_DELEGATE_CUR)\n",
1421 clp->cl_hostname);
1422 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1423 nfs_inode_set_delegation(state->inode,
1424 data->owner->so_cred,
1425 &data->o_res);
1426 else
1427 nfs_inode_reclaim_delegation(state->inode,
1428 data->owner->so_cred,
1429 &data->o_res);
1430}
1431
1432/*
1433 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1434 * and update the nfs4_state.
1435 */
1436static struct nfs4_state *
1437_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1438{
1439 struct inode *inode = data->state->inode;
1440 struct nfs4_state *state = data->state;
1441 int ret;
1442
d2bfda2e
WAA		 1443 if (!data->rpc_done) {
1444 if (data->rpc_status) {
1445 ret = data->rpc_status;
1446 goto err;
1447 }
1448 /* cached opens have already been processed */
1449 goto update;
e23008ec
AA		 1450 }
1451
e23008ec
AA		 1452 ret = nfs_refresh_inode(inode, &data->f_attr);
1453 if (ret)
1454 goto err;
1455
1456 if (data->o_res.delegation_type != 0)
1457 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1458update:
e23008ec
AA		 1459 update_open_stateid(state, &data->o_res.stateid, NULL,
1460 data->o_arg.fmode);
d49f042a 1461 atomic_inc(&state->count);
e23008ec
AA		 1462
1463 return state;
1464err:
1465 return ERR_PTR(ret);
1466
1467}
1468
1469static struct nfs4_state *
1470_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1471{
1472 struct inode *inode;
1473 struct nfs4_state *state = NULL;
1b370bc2 1474 int ret;
24ac23ab 1475
aac00a8d 1476 if (!data->rpc_done) {
6ee41268 1477 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1478 goto out;
1479 }
1480
1b370bc2 1481 ret = -EAGAIN;
24ac23ab 1482 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1483 goto err;
1775fd3e 1484 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1485 ret = PTR_ERR(inode);
03f28e3a 1486 if (IS_ERR(inode))
1b370bc2
TM		 1487 goto err;
1488 ret = -ENOMEM;
24ac23ab
TM		 1489 state = nfs4_get_open_state(inode, data->owner);
1490 if (state == NULL)
1b370bc2 1491 goto err_put_inode;
e23008ec
AA		 1492 if (data->o_res.delegation_type != 0)
1493 nfs4_opendata_check_deleg(data, state);
34310430 1494 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1495 data->o_arg.fmode);
24ac23ab 1496 iput(inode);
aac00a8d 1497out:
7aa262b5 1498 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1499 return state;
1b370bc2
TM		 1500err_put_inode:
1501 iput(inode);
1502err:
1503 return ERR_PTR(ret);
24ac23ab
TM		 1504}
1505
e23008ec
AA		 1506static struct nfs4_state *
1507nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1508{
1509 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1510 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1511 return _nfs4_opendata_to_nfs4_state(data);
1512}
1513
864472e9
TM		 1514static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1515{
1516 struct nfs_inode *nfsi = NFS_I(state->inode);
1517 struct nfs_open_context *ctx;
1518
1519 spin_lock(&state->inode->i_lock);
1520 list_for_each_entry(ctx, &nfsi->open_files, list) {
1521 if (ctx->state != state)
1522 continue;
1523 get_nfs_open_context(ctx);
1524 spin_unlock(&state->inode->i_lock);
1525 return ctx;
1526 }
1527 spin_unlock(&state->inode->i_lock);
1528 return ERR_PTR(-ENOENT);
1529}
1530
4a1c0893
TM		 1531static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1532 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1533{
1534 struct nfs4_opendata *opendata;
1535
4a1c0893 1536 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1537 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1538 if (opendata == NULL)
1539 return ERR_PTR(-ENOMEM);
1540 opendata->state = state;
1541 atomic_inc(&state->count);
1542 return opendata;
1543}
1544
dc0b027d 1545static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1546{
2ced46c2 1547 struct nfs4_state *newstate;
864472e9
TM		 1548 int ret;
1549
39f897fd
N		 1550 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1551 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1552 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1553 /* This mode can't have been delegated, so we must have
1554 * a valid open_stateid to cover it - not need to reclaim.
1555 */
1556 return 0;
dc0b027d
TM		 1557 opendata->o_arg.open_flags = 0;
1558 opendata->o_arg.fmode = fmode;
be36e185
TM		 1559 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1560 NFS_SB(opendata->dentry->d_sb),
1561 fmode, 0);
2ced46c2
TM		 1562 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1563 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1564 nfs4_init_opendata_res(opendata);
b257957e 1565 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1566 if (ret != 0)
1567 return ret;
2ced46c2 1568 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1569 if (IS_ERR(newstate))
1570 return PTR_ERR(newstate);
643168c2 1571 nfs4_close_state(newstate, fmode);
2ced46c2 1572 *res = newstate;
864472e9
TM		 1573 return 0;
1574}
1575
1576static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1577{
864472e9 1578 struct nfs4_state *newstate;
864472e9
TM		 1579 int ret;
1580
4f14c194
TM		 1581 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1582 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1583 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1584 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1585 /* memory barrier prior to reading state->n_* */
2ced46c2 1586 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1587 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1588 smp_rmb();
1589 if (state->n_rdwr != 0) {
2ced46c2 1590 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1591 if (ret != 0)
1592 return ret;
2ced46c2
TM		 1593 if (newstate != state)
1594 return -ESTALE;
864472e9
TM		 1595 }
1596 if (state->n_wronly != 0) {
2ced46c2 1597 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1598 if (ret != 0)
1599 return ret;
2ced46c2
TM		 1600 if (newstate != state)
1601 return -ESTALE;
864472e9
TM		 1602 }
1603 if (state->n_rdonly != 0) {
2ced46c2 1604 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1605 if (ret != 0)
1606 return ret;
2ced46c2
TM		 1607 if (newstate != state)
1608 return -ESTALE;
864472e9 1609 }
1ac7e2fd
TM		 1610 /*
1611 * We may have performed cached opens for all three recoveries.
1612 * Check if we need to update the current stateid.
1613 */
1614 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1615 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1616 write_seqlock(&state->seqlock);
1ac7e2fd 1617 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1618 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1619 write_sequnlock(&state->seqlock);
1ac7e2fd 1620 }
864472e9
TM		 1621 return 0;
1622}
1623
1da177e4
LT		 1624/*
1625 * OPEN_RECLAIM:
1626 * reclaim state on the server after a reboot.
1da177e4 1627 */
539cd03a 1628static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1629{
1ac7e2fd 1630 struct nfs_delegation *delegation;
864472e9 1631 struct nfs4_opendata *opendata;
dc0b027d 1632 fmode_t delegation_type = 0;
1da177e4
LT		 1633 int status;
1634
4a1c0893
TM		 1635 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1636 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1637 if (IS_ERR(opendata))
1638 return PTR_ERR(opendata);
1ac7e2fd
TM		 1639 rcu_read_lock();
1640 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1641 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1642 delegation_type = delegation->type;
1ac7e2fd 1643 rcu_read_unlock();
864472e9
TM		 1644 opendata->o_arg.u.delegation_type = delegation_type;
1645 status = nfs4_open_recover(opendata, state);
c6d00e63 1646 nfs4_opendata_put(opendata);
1da177e4
LT		 1647 return status;
1648}
1649
539cd03a 1650static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1651{
1652 struct nfs_server *server = NFS_SERVER(state->inode);
1653 struct nfs4_exception exception = { };
1654 int err;
1655 do {
539cd03a 1656 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1657 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1658 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1659 continue;
168667c4 1660 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1661 break;
1662 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1663 } while (exception.retry);
1664 return err;
1665}
1666
864472e9
TM		 1667static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1668{
1669 struct nfs_open_context *ctx;
1670 int ret;
1671
1672 ctx = nfs4_state_find_open_context(state);
1673 if (IS_ERR(ctx))
91876b13 1674 return -EAGAIN;
539cd03a 1675 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1676 put_nfs_open_context(ctx);
1677 return ret;
1678}
1679
db4f2e63 1680static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1681{
be76b5b6
TM		 1682 switch (err) {
1683 default:
1684 printk(KERN_ERR "NFS: %s: unhandled error "
1685 "%d.\n", __func__, err);
1686 case 0:
1687 case -ENOENT:
8eee52af 1688 case -EAGAIN:
be76b5b6
TM		 1689 case -ESTALE:
1690 break;
1691 case -NFS4ERR_BADSESSION:
1692 case -NFS4ERR_BADSLOT:
1693 case -NFS4ERR_BAD_HIGH_SLOT:
1694 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1695 case -NFS4ERR_DEADSESSION:
1696 set_bit(NFS_DELEGATED_STATE, &state->flags);
1697 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1698 return -EAGAIN;
1699 case -NFS4ERR_STALE_CLIENTID:
1700 case -NFS4ERR_STALE_STATEID:
1701 set_bit(NFS_DELEGATED_STATE, &state->flags);
1702 case -NFS4ERR_EXPIRED:
1703 /* Don't recall a delegation if it was lost */
1704 nfs4_schedule_lease_recovery(server->nfs_client);
1705 return -EAGAIN;
352297b9
CL		 1706 case -NFS4ERR_MOVED:
1707 nfs4_schedule_migration_recovery(server);
1708 return -EAGAIN;
8ef2f8d4
CL		 1709 case -NFS4ERR_LEASE_MOVED:
1710 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1711 return -EAGAIN;
be76b5b6
TM		 1712 case -NFS4ERR_DELEG_REVOKED:
1713 case -NFS4ERR_ADMIN_REVOKED:
1714 case -NFS4ERR_BAD_STATEID:
db4f2e63 1715 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1716 nfs_inode_find_state_and_recover(state->inode,
1717 stateid);
1718 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1719 return -EAGAIN;
be76b5b6
TM		 1720 case -NFS4ERR_DELAY:
1721 case -NFS4ERR_GRACE:
1722 set_bit(NFS_DELEGATED_STATE, &state->flags);
1723 ssleep(1);
1724 return -EAGAIN;
db4f2e63
TM		 1725 case -ENOMEM:
1726 case -NFS4ERR_DENIED:
1727 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1728 return 0;
be76b5b6 1729 }
1da177e4
LT		 1730 return err;
1731}
1732
db4f2e63
TM		 1733int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1734{
1735 struct nfs_server *server = NFS_SERVER(state->inode);
1736 struct nfs4_opendata *opendata;
1737 int err;
1738
1739 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1740 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1741 if (IS_ERR(opendata))
1742 return PTR_ERR(opendata);
1743 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1744 err = nfs4_open_recover(opendata, state);
1745 nfs4_opendata_put(opendata);
1746 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1747}
1748
be05c860
CL		 1749static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1750{
1751 struct nfs4_opendata *data = calldata;
1752
cb04ad2a
PT		 1753 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1754 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1755}
1756
cdd4e68b
TM		 1757static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1758{
1759 struct nfs4_opendata *data = calldata;
1760
17ead6c8 1761 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1762
cdd4e68b 1763 data->rpc_status = task->tk_status;
26e976a8 1764 if (data->rpc_status == 0) {
f597c537 1765 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1766 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1767 renew_lease(data->o_res.server, data->timestamp);
3e309914 1768 data->rpc_done = 1;
26e976a8 1769 }
cdd4e68b
TM		 1770}
1771
1772static void nfs4_open_confirm_release(void *calldata)
1773{
1774 struct nfs4_opendata *data = calldata;
1775 struct nfs4_state *state = NULL;
1776
1777 /* If this request hasn't been cancelled, do nothing */
1778 if (data->cancelled == 0)
1779 goto out_free;
1780 /* In case of error, no cleanup! */
3e309914 1781 if (!data->rpc_done)
cdd4e68b 1782 goto out_free;
cdd4e68b 1783 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1784 if (!IS_ERR(state))
643168c2 1785 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1786out_free:
c6d00e63 1787 nfs4_opendata_put(data);
cdd4e68b
TM		 1788}
1789
1790static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1791 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1792 .rpc_call_done = nfs4_open_confirm_done,
1793 .rpc_release = nfs4_open_confirm_release,
1794};
1795
1796/*
1797 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1798 */
1799static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1800{
2b0143b5 1801 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1802 struct rpc_task *task;
5138fde0
TM		 1803 struct rpc_message msg = {
1804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1805 .rpc_argp = &data->c_arg,
1806 .rpc_resp = &data->c_res,
1807 .rpc_cred = data->owner->so_cred,
1808 };
c970aa85
TM		 1809 struct rpc_task_setup task_setup_data = {
1810 .rpc_client = server->client,
5138fde0 1811 .rpc_message = &msg,
c970aa85
TM		 1812 .callback_ops = &nfs4_open_confirm_ops,
1813 .callback_data = data,
101070ca 1814 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1815 .flags = RPC_TASK_ASYNC,
1816 };
1da177e4
LT		 1817 int status;
1818
17ead6c8 1819 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1820 kref_get(&data->kref);
3e309914
TM		 1821 data->rpc_done = 0;
1822 data->rpc_status = 0;
5138fde0 1823 data->timestamp = jiffies;
c970aa85 1824 task = rpc_run_task(&task_setup_data);
7a1218a2 1825 if (IS_ERR(task))
cdd4e68b 1826 return PTR_ERR(task);
cdd4e68b
TM		 1827 status = nfs4_wait_for_completion_rpc_task(task);
1828 if (status != 0) {
1829 data->cancelled = 1;
1830 smp_wmb();
1831 } else
1832 status = data->rpc_status;
e6b3c4db 1833 rpc_put_task(task);
1da177e4
LT		 1834 return status;
1835}
1836
24ac23ab 1837static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1838{
24ac23ab
TM		 1839 struct nfs4_opendata *data = calldata;
1840 struct nfs4_state_owner *sp = data->owner;
549b19cc 1841 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1842
24ac23ab 1843 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1844 goto out_wait;
aac00a8d
TM		 1845 /*
1846 * Check if we still need to send an OPEN call, or if we can use
1847 * a delegation instead.
1848 */
1849 if (data->state != NULL) {
1850 struct nfs_delegation *delegation;
1851
dc0b027d 1852 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1853 goto out_no_action;
aac00a8d
TM		 1854 rcu_read_lock();
1855 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1856 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1857 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1858 can_open_delegated(delegation, data->o_arg.fmode))
1859 goto unlock_no_action;
aac00a8d
TM		 1860 rcu_read_unlock();
1861 }
95b72eb0 1862 /* Update client id. */
549b19cc 1863 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1864 switch (data->o_arg.claim) {
1865 case NFS4_OPEN_CLAIM_PREVIOUS:
1866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1868 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1869 case NFS4_OPEN_CLAIM_FH:
1870 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1871 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1872 }
26e976a8 1873 data->timestamp = jiffies;
035168ab 1874 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1875 &data->o_arg.seq_args,
2240a9e2
TM		 1876 &data->o_res.seq_res,
1877 task) != 0)
1878 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1879
1880 /* Set the create mode (note dependency on the session type) */
1881 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1882 if (data->o_arg.open_flags & O_EXCL) {
1883 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1884 if (nfs4_has_persistent_session(clp))
1885 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1886 else if (clp->cl_mvops->minor_version > 0)
1887 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1888 }
6ee41268 1889 return;
652f89f6
TM		 1890unlock_no_action:
1891 rcu_read_unlock();
6ee41268
TM		 1892out_no_action:
1893 task->tk_action = NULL;
c8da19b9 1894out_wait:
b75ad4cd 1895 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1896}
1897
24ac23ab
TM		 1898static void nfs4_open_done(struct rpc_task *task, void *calldata)
1899{
1900 struct nfs4_opendata *data = calldata;
1da177e4 1901
24ac23ab 1902 data->rpc_status = task->tk_status;
d898528c 1903
14516c3a
TM		 1904 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1905 return;
d898528c 1906
24ac23ab 1907 if (task->tk_status == 0) {
807d66d8
TM		 1908 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1909 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1910 case S_IFREG:
1911 break;
1912 case S_IFLNK:
24ac23ab 1913 data->rpc_status = -ELOOP;
6f926b5b
TM		 1914 break;
1915 case S_IFDIR:
24ac23ab 1916 data->rpc_status = -EISDIR;
6f926b5b
TM		 1917 break;
1918 default:
24ac23ab 1919 data->rpc_status = -ENOTDIR;
807d66d8 1920 }
6f926b5b 1921 }
26e976a8 1922 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1923 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1924 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1925 }
3e309914 1926 data->rpc_done = 1;
24ac23ab 1927}
6f926b5b 1928
24ac23ab
TM		 1929static void nfs4_open_release(void *calldata)
1930{
1931 struct nfs4_opendata *data = calldata;
1932 struct nfs4_state *state = NULL;
1933
1934 /* If this request hasn't been cancelled, do nothing */
1935 if (data->cancelled == 0)
1936 goto out_free;
1937 /* In case of error, no cleanup! */
3e309914 1938 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1939 goto out_free;
1940 /* In case we need an open_confirm, no cleanup! */
1941 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1942 goto out_free;
24ac23ab 1943 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1944 if (!IS_ERR(state))
643168c2 1945 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1946out_free:
c6d00e63 1947 nfs4_opendata_put(data);
24ac23ab
TM		 1948}
1949
1950static const struct rpc_call_ops nfs4_open_ops = {
1951 .rpc_call_prepare = nfs4_open_prepare,
1952 .rpc_call_done = nfs4_open_done,
1953 .rpc_release = nfs4_open_release,
1954};
1955
b257957e 1956static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1957{
2b0143b5 1958 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1959 struct nfs_server *server = NFS_SERVER(dir);
1960 struct nfs_openargs *o_arg = &data->o_arg;
1961 struct nfs_openres *o_res = &data->o_res;
1962 struct rpc_task *task;
5138fde0
TM		 1963 struct rpc_message msg = {
1964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1965 .rpc_argp = o_arg,
1966 .rpc_resp = o_res,
1967 .rpc_cred = data->owner->so_cred,
1968 };
c970aa85
TM		 1969 struct rpc_task_setup task_setup_data = {
1970 .rpc_client = server->client,
5138fde0 1971 .rpc_message = &msg,
c970aa85
TM		 1972 .callback_ops = &nfs4_open_ops,
1973 .callback_data = data,
101070ca 1974 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1975 .flags = RPC_TASK_ASYNC,
1976 };
24ac23ab
TM		 1977 int status;
1978
a9c92d6b 1979 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1980 kref_get(&data->kref);
3e309914
TM		 1981 data->rpc_done = 0;
1982 data->rpc_status = 0;
2ced46c2 1983 data->cancelled = 0;
bdeca1b7
TM		 1984 data->is_recover = 0;
1985 if (isrecover) {
8fe72bac 1986 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1987 data->is_recover = 1;
1988 }
c970aa85 1989 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1990 if (IS_ERR(task))
1991 return PTR_ERR(task);
1992 status = nfs4_wait_for_completion_rpc_task(task);
1993 if (status != 0) {
1994 data->cancelled = 1;
1995 smp_wmb();
1996 } else
1997 status = data->rpc_status;
1998 rpc_put_task(task);
1999
2000 return status;
2001}
2002
2003static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2004{
2b0143b5 2005 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2006 struct nfs_openres *o_res = &data->o_res;
2007 int status;
2008
2009 status = nfs4_run_open_task(data, 1);
2010 if (status != 0 || !data->rpc_done)
2011 return status;
2012
6926afd1
TM		 2013 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2014
b257957e
AB		 2015 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2016 status = _nfs4_proc_open_confirm(data);
2017 if (status != 0)
2018 return status;
2019 }
2020
2021 return status;
2022}
2023
f3792d63
TM		 2024/*
2025 * Additional permission checks in order to distinguish between an
2026 * open for read, and an open for execute. This works around the
2027 * fact that NFSv4 OPEN treats read and execute permissions as being
2028 * the same.
2029 * Note that in the non-execute case, we want to turn off permission
2030 * checking if we just created a new file (POSIX open() semantics).
2031 */
6168f62c
WAA		 2032static int nfs4_opendata_access(struct rpc_cred *cred,
2033 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2034 struct nfs4_state *state, fmode_t fmode,
2035 int openflags)
6168f62c
WAA		 2036{
2037 struct nfs_access_entry cache;
2038 u32 mask;
2039
2040 /* access call failed or for some reason the server doesn't
2041 * support any access modes -- defer access call until later */
2042 if (opendata->o_res.access_supported == 0)
2043 return 0;
2044
2045 mask = 0;
f3792d63
TM		 2046 /*
2047 * Use openflags to check for exec, because fmode won't
2048 * always have FMODE_EXEC set when file open for exec.
2049 */
f8d9a897
WAA		 2050 if (openflags & __FMODE_EXEC) {
2051 /* ONLY check for exec rights */
2052 mask = MAY_EXEC;
f3792d63 2053 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2054 mask = MAY_READ;
6168f62c
WAA		 2055
2056 cache.cred = cred;
2057 cache.jiffies = jiffies;
2058 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2059 nfs_access_add_cache(state->inode, &cache);
2060
bbd3a8ee 2061 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2062 return 0;
2063
2064 /* even though OPEN succeeded, access is denied. Close the file */
2065 nfs4_close_state(state, fmode);
998f40b5 2066 return -EACCES;
6168f62c
WAA		 2067}
2068
b257957e
AB		 2069/*
2070 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2071 */
2072static int _nfs4_proc_open(struct nfs4_opendata *data)
2073{
2b0143b5 2074 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2075 struct nfs_server *server = NFS_SERVER(dir);
2076 struct nfs_openargs *o_arg = &data->o_arg;
2077 struct nfs_openres *o_res = &data->o_res;
2078 int status;
2079
2080 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2081 if (!data->rpc_done)
2082 return status;
2083 if (status != 0) {
2084 if (status == -NFS4ERR_BADNAME &&
2085 !(o_arg->open_flags & O_CREAT))
2086 return -ENOENT;
24ac23ab 2087 return status;
08ef7bd3 2088 }
24ac23ab 2089
6926afd1
TM		 2090 nfs_fattr_map_and_free_names(server, &data->f_attr);
2091
5bc2afc2 2092 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2093 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2094 if (o_arg->open_flags & O_EXCL)
2095 data->file_created = 1;
2096 else if (o_res->cinfo.before != o_res->cinfo.after)
2097 data->file_created = 1;
2098 }
0df5dd4a
TM		 2099 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2100 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2101 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2102 status = _nfs4_proc_open_confirm(data);
1da177e4 2103 if (status != 0)
24ac23ab 2104 return status;
1da177e4
LT		 2105 }
2106 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2107 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2108 return 0;
1da177e4
LT		 2109}
2110
d83217c1
AA		 2111static int nfs4_recover_expired_lease(struct nfs_server *server)
2112{
2113 return nfs4_client_recover_expired_lease(server->nfs_client);
2114}
2115
1da177e4
LT		 2116/*
2117 * OPEN_EXPIRED:
2118 * reclaim state on the server after a network partition.
2119 * Assumes caller holds the appropriate lock
2120 */
539cd03a 2121static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2122{
e56e0b78 2123 struct nfs4_opendata *opendata;
864472e9 2124 int ret;
1da177e4 2125
4a1c0893 2126 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2127 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2128 if (IS_ERR(opendata))
2129 return PTR_ERR(opendata);
864472e9 2130 ret = nfs4_open_recover(opendata, state);
35d05778 2131 if (ret == -ESTALE)
3d4ff43d 2132 d_drop(ctx->dentry);
c6d00e63 2133 nfs4_opendata_put(opendata);
864472e9 2134 return ret;
1da177e4
LT		 2135}
2136
a9ed2e25 2137static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2138{
539cd03a 2139 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2140 struct nfs4_exception exception = { };
2141 int err;
2142
2143 do {
539cd03a 2144 err = _nfs4_open_expired(ctx, state);
42113a75 2145 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2146 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2147 continue;
a9ed2e25
TM		 2148 switch (err) {
2149 default:
2150 goto out;
2151 case -NFS4ERR_GRACE:
2152 case -NFS4ERR_DELAY:
2153 nfs4_handle_exception(server, err, &exception);
2154 err = 0;
2155 }
202b50dc 2156 } while (exception.retry);
a9ed2e25 2157out:
202b50dc
TM		 2158 return err;
2159}
2160
1da177e4
LT		 2161static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2162{
1da177e4 2163 struct nfs_open_context *ctx;
864472e9 2164 int ret;
1da177e4 2165
864472e9
TM		 2166 ctx = nfs4_state_find_open_context(state);
2167 if (IS_ERR(ctx))
91876b13 2168 return -EAGAIN;
539cd03a 2169 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2170 put_nfs_open_context(ctx);
2171 return ret;
1da177e4
LT		 2172}
2173
4dfd4f7a
TM		 2174static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2175{
2176 nfs_remove_bad_delegation(state->inode);
2177 write_seqlock(&state->seqlock);
2178 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2179 write_sequnlock(&state->seqlock);
2180 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2181}
2182
2183static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2184{
2185 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2186 nfs_finish_clear_delegation_stateid(state);
2187}
2188
2189static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2190{
2191 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2192 nfs40_clear_delegation_stateid(state);
2193 return nfs4_open_expired(sp, state);
2194}
2195
f062eb6c 2196#if defined(CONFIG_NFS_V4_1)
0c116cad 2197static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2198{
f062eb6c 2199 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2200 nfs4_stateid stateid;
ab7cb0df 2201 struct nfs_delegation *delegation;
0c116cad
TM		 2202 struct rpc_cred *cred;
2203 int status;
3e60ffdd 2204
ab7cb0df
TM		 2205 /* Get the delegation credential for use by test/free_stateid */
2206 rcu_read_lock();
2207 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2208 if (delegation == NULL) {
ab7cb0df 2209 rcu_read_unlock();
0c116cad
TM		 2210 return;
2211 }
2212
2213 nfs4_stateid_copy(&stateid, &delegation->stateid);
2214 cred = get_rpccred(delegation->cred);
2215 rcu_read_unlock();
2216 status = nfs41_test_stateid(server, &stateid, cred);
2217 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2218
3e60ffdd
CL		 2219 if (status != NFS_OK) {
2220 /* Free the stateid unless the server explicitly
2221 * informs us the stateid is unrecognized. */
2222 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2223 nfs41_free_stateid(server, &stateid, cred);
2224 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2225 }
ab7cb0df 2226
0c116cad 2227 put_rpccred(cred);
3e60ffdd
CL		 2228}
2229
2230/**
2231 * nfs41_check_open_stateid - possibly free an open stateid
2232 *
2233 * @state: NFSv4 state for an inode
2234 *
2235 * Returns NFS_OK if recovery for this stateid is now finished.
2236 * Otherwise a negative NFS4ERR value is returned.
2237 */
2238static int nfs41_check_open_stateid(struct nfs4_state *state)
2239{
2240 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2241 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2242 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2243 int status;
2244
2245 /* If a state reset has been done, test_stateid is unneeded */
2246 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2247 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2248 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2249 return -NFS4ERR_BAD_STATEID;
2250
ab7cb0df 2251 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2252 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2253 if (status != NFS_OK) {
2254 /* Free the stateid unless the server explicitly
2255 * informs us the stateid is unrecognized. */
2256 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2257 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2258
2259 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2260 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2261 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2262 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2263 }
2264 return status;
2265}
2266
2267static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2268{
eb64cf96 2269 int status;
b01dd1d8 2270
0c116cad 2271 nfs41_check_delegation_stateid(state);
3e60ffdd 2272 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2273 if (status != NFS_OK)
2274 status = nfs4_open_expired(sp, state);
2275 return status;
f062eb6c
BS		 2276}
2277#endif
2278
aa53ed54
JL		 2279/*
2280 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2281 * fields corresponding to attributes that were used to store the verifier.
2282 * Make sure we clobber those fields in the later setattr call
2283 */
2284static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2285{
2286 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2287 !(sattr->ia_valid & ATTR_ATIME_SET))
2288 sattr->ia_valid |= ATTR_ATIME;
2289
2290 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2291 !(sattr->ia_valid & ATTR_MTIME_SET))
2292 sattr->ia_valid |= ATTR_MTIME;
2293}
2294
c21443c2
TM		 2295static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2296 fmode_t fmode,
2297 int flags,
3efb9722 2298 struct nfs_open_context *ctx)
c21443c2
TM		 2299{
2300 struct nfs4_state_owner *sp = opendata->owner;
2301 struct nfs_server *server = sp->so_server;
275bb307 2302 struct dentry *dentry;
c21443c2
TM		 2303 struct nfs4_state *state;
2304 unsigned int seq;
2305 int ret;
2306
2307 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2308
2309 ret = _nfs4_proc_open(opendata);
dca78001 2310 if (ret != 0)
c21443c2
TM		 2311 goto out;
2312
2313 state = nfs4_opendata_to_nfs4_state(opendata);
2314 ret = PTR_ERR(state);
2315 if (IS_ERR(state))
2316 goto out;
2317 if (server->caps & NFS_CAP_POSIX_LOCK)
2318 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2319
275bb307 2320 dentry = opendata->dentry;
2b0143b5 2321 if (d_really_is_negative(dentry)) {
275bb307
TM		 2322 /* FIXME: Is this d_drop() ever needed? */
2323 d_drop(dentry);
2324 dentry = d_add_unique(dentry, igrab(state->inode));
2325 if (dentry == NULL) {
2326 dentry = opendata->dentry;
2327 } else if (dentry != ctx->dentry) {
2328 dput(ctx->dentry);
2329 ctx->dentry = dget(dentry);
2330 }
2331 nfs_set_verifier(dentry,
2b0143b5 2332 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2333 }
2334
c21443c2
TM		 2335 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2336 if (ret != 0)
2337 goto out;
2338
3efb9722 2339 ctx->state = state;
2b0143b5 2340 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2341 nfs_inode_attach_open_context(ctx);
2342 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2343 nfs4_schedule_stateid_recovery(server, state);
2344 }
c21443c2
TM		 2345out:
2346 return ret;
2347}
2348
1da177e4 2349/*
24ac23ab 2350 * Returns a referenced nfs4_state
1da177e4 2351 */
82be417a 2352static int _nfs4_do_open(struct inode *dir,
4197a055 2353 struct nfs_open_context *ctx,
82be417a
AA		 2354 int flags,
2355 struct iattr *sattr,
5bc2afc2
TM		 2356 struct nfs4_label *label,
2357 int *opened)
1da177e4
LT		 2358{
2359 struct nfs4_state_owner *sp;
2360 struct nfs4_state *state = NULL;
2361 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2362 struct nfs4_opendata *opendata;
4197a055
TM		 2363 struct dentry *dentry = ctx->dentry;
2364 struct rpc_cred *cred = ctx->cred;
2365 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2366 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2367 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2368 struct nfs4_label *olabel = NULL;
aac00a8d 2369 int status;
1da177e4
LT		 2370
2371 /* Protect against reboot recovery conflicts */
1da177e4 2372 status = -ENOMEM;
d1e284d5
TM		 2373 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2374 if (sp == NULL) {
1da177e4
LT		 2375 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2376 goto out_err;
2377 }
58d9714a
TM		 2378 status = nfs4_recover_expired_lease(server);
2379 if (status != 0)
b4454fe1 2380 goto err_put_state_owner;
2b0143b5
DH		 2381 if (d_really_is_positive(dentry))
2382 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2383 status = -ENOMEM;
2b0143b5 2384 if (d_really_is_positive(dentry))
49f9a0fa 2385 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2386 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2387 label, claim, GFP_KERNEL);
e56e0b78 2388 if (opendata == NULL)
95d35cb4 2389 goto err_put_state_owner;
1da177e4 2390
14c43f76
DQ		 2391 if (label) {
2392 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2393 if (IS_ERR(olabel)) {
2394 status = PTR_ERR(olabel);
2395 goto err_opendata_put;
2396 }
2397 }
2398
e911b815
TM		 2399 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2400 if (!opendata->f_attr.mdsthreshold) {
2401 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2402 if (!opendata->f_attr.mdsthreshold)
2403 goto err_free_label;
2404 }
1549210f 2405 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2406 }
2b0143b5
DH		 2407 if (d_really_is_positive(dentry))
2408 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2409
3efb9722 2410 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2411 if (status != 0)
14c43f76 2412 goto err_free_label;
3efb9722 2413 state = ctx->state;
6168f62c 2414
549b19cc
TM		 2415 if ((opendata->o_arg.open_flags & O_EXCL) &&
2416 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2417 nfs4_exclusive_attrset(opendata, sattr);
2418
2419 nfs_fattr_init(opendata->o_res.f_attr);
2420 status = nfs4_do_setattr(state->inode, cred,
2421 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2422 state, label, olabel);
2423 if (status == 0) {
f044636d
TM		 2424 nfs_setattr_update_inode(state->inode, sattr,
2425 opendata->o_res.f_attr);
aa9c2669 2426 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2427 }
0ab64e0e 2428 }
5bc2afc2
TM		 2429 if (opendata->file_created)
2430 *opened |= FILE_CREATED;
82be417a 2431
e911b815 2432 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2433 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2434 opendata->f_attr.mdsthreshold = NULL;
2435 }
82be417a 2436
14c43f76
DQ		 2437 nfs4_label_free(olabel);
2438
c6d00e63 2439 nfs4_opendata_put(opendata);
1da177e4 2440 nfs4_put_state_owner(sp);
1da177e4 2441 return 0;
14c43f76
DQ		 2442err_free_label:
2443 nfs4_label_free(olabel);
c6d00e63
TM		 2444err_opendata_put:
2445 nfs4_opendata_put(opendata);
e56e0b78
TM		 2446err_put_state_owner:
2447 nfs4_put_state_owner(sp);
1da177e4 2448out_err:
1da177e4
LT		 2449 return status;
2450}
2451
2452
82be417a 2453static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2454 struct nfs_open_context *ctx,
82be417a
AA		 2455 int flags,
2456 struct iattr *sattr,
5bc2afc2
TM		 2457 struct nfs4_label *label,
2458 int *opened)
1da177e4 2459{
49f9a0fa 2460 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2461 struct nfs4_exception exception = { };
2462 struct nfs4_state *res;
2463 int status;
2464
2465 do {
5bc2afc2 2466 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2467 res = ctx->state;
42113a75 2468 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2469 if (status == 0)
2470 break;
2471 /* NOTE: BAD_SEQID means the server and client disagree about the
2472 * book-keeping w.r.t. state-changing operations
2473 * (OPEN/CLOSE/LOCK/LOCKU...)
2474 * It is actually a sign of a bug on the client or on the server.
2475 *
2476 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2477 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2478 * have unhashed the old state_owner for us, and that we can
2479 * therefore safely retry using a new one. We should still warn
2480 * the user though...
2481 */
2482 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2483 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2484 " returned a bad sequence-id error!\n",
2485 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2486 exception.retry = 1;
2487 continue;
2488 }
550f5747
TM		 2489 /*
2490 * BAD_STATEID on OPEN means that the server cancelled our
2491 * state before it received the OPEN_CONFIRM.
2492 * Recover by retrying the request as per the discussion
2493 * on Page 181 of RFC3530.
2494 */
2495 if (status == -NFS4ERR_BAD_STATEID) {
2496 exception.retry = 1;
2497 continue;
2498 }
aac00a8d
TM		 2499 if (status == -EAGAIN) {
2500 /* We must have found a delegation */
2501 exception.retry = 1;
2502 continue;
2503 }
49f9a0fa
TM		 2504 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2505 continue;
2506 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2507 status, &exception));
2508 } while (exception.retry);
2509 return res;
2510}
2511
659bfcd6
TM		 2512static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2513 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2514 struct nfs4_state *state, struct nfs4_label *ilabel,
2515 struct nfs4_label *olabel)
1da177e4 2516{
3e4f6290 2517 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2518 struct nfs_setattrargs arg = {
3e4f6290 2519 .fh = NFS_FH(inode),
1da177e4
LT		 2520 .iap = sattr,
2521 .server = server,
2522 .bitmask = server->attr_bitmask,
1775fd3e 2523 .label = ilabel,
1da177e4
LT		 2524 };
2525 struct nfs_setattrres res = {
2526 .fattr = fattr,
1775fd3e 2527 .label = olabel,
1da177e4
LT		 2528 .server = server,
2529 };
2530 struct rpc_message msg = {
659bfcd6
TM		 2531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2532 .rpc_argp = &arg,
2533 .rpc_resp = &res,
2534 .rpc_cred = cred,
1da177e4 2535 };
26e976a8 2536 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2537 fmode_t fmode;
2538 bool truncate;
65e4308d 2539 int status;
1da177e4 2540
aa9c2669
DQ		 2541 arg.bitmask = nfs4_bitmask(server, ilabel);
2542 if (ilabel)
2543 arg.bitmask = nfs4_bitmask(server, olabel);
2544
0e574af1 2545 nfs_fattr_init(fattr);
1da177e4 2546
ee3ae84e
TM		 2547 /* Servers should only apply open mode checks for file size changes */
2548 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2549 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2550
2551 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2552 /* Use that stateid */
0418dae1 2553 } else if (truncate && state != NULL) {
2a369153
TM		 2554 struct nfs_lockowner lockowner = {
2555 .l_owner = current->files,
2556 .l_pid = current->tgid,
2557 };
0418dae1
TM		 2558 if (!nfs4_valid_open_stateid(state))
2559 return -EBADF;
2560 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2561 &lockowner) == -EIO)
2562 return -EBADF;
08e9eac4 2563 } else
f597c537 2564 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2565
7c513058 2566 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2567 if (status == 0 && state != NULL)
2568 renew_lease(server, timestamp);
65e4308d 2569 return status;
1da177e4
LT		 2570}
2571
659bfcd6
TM		 2572static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2573 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2574 struct nfs4_state *state, struct nfs4_label *ilabel,
2575 struct nfs4_label *olabel)
1da177e4 2576{
3e4f6290 2577 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2578 struct nfs4_exception exception = {
2579 .state = state,
3114ea7a 2580 .inode = inode,
a1d0b5ee 2581 };
1da177e4
LT		 2582 int err;
2583 do {
1775fd3e 2584 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2585 trace_nfs4_setattr(inode, err);
451146be
TM		 2586 switch (err) {
2587 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2588 if (!(sattr->ia_valid & ATTR_SIZE)) {
2589 pr_warn_once("NFSv4: server %s is incorrectly "
2590 "applying open mode checks to "
2591 "a SETATTR that is not "
2592 "changing file size.\n",
2593 server->nfs_client->cl_hostname);
2594 }
451146be
TM		 2595 if (state && !(state->state & FMODE_WRITE)) {
2596 err = -EBADF;
2597 if (sattr->ia_valid & ATTR_OPEN)
2598 err = -EACCES;
2599 goto out;
2600 }
2601 }
2602 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2603 } while (exception.retry);
451146be 2604out:
1da177e4
LT		 2605 return err;
2606}
2607
2608struct nfs4_closedata {
2609 struct inode *inode;
2610 struct nfs4_state *state;
2611 struct nfs_closeargs arg;
2612 struct nfs_closeres res;
516a6af6 2613 struct nfs_fattr fattr;
26e976a8 2614 unsigned long timestamp;
f7e8917a
FI		 2615 bool roc;
2616 u32 roc_barrier;
1da177e4
LT		 2617};
2618
963d8fe5 2619static void nfs4_free_closedata(void *data)
9512135d 2620{
963d8fe5
TM		 2621 struct nfs4_closedata *calldata = data;
2622 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2623 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2624
f7e8917a
FI		 2625 if (calldata->roc)
2626 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2627 nfs4_put_open_state(calldata->state);
2628 nfs_free_seqid(calldata->arg.seqid);
9512135d 2629 nfs4_put_state_owner(sp);
322b2b90 2630 nfs_sb_deactive(sb);
9512135d
TM		 2631 kfree(calldata);
2632}
2633
963d8fe5 2634static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2635{
963d8fe5 2636 struct nfs4_closedata *calldata = data;
1da177e4 2637 struct nfs4_state *state = calldata->state;
1da177e4 2638 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2639 nfs4_stateid *res_stateid = NULL;
1da177e4 2640
a3ca5651 2641 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2642 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2643 return;
42113a75 2644 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2645 /* hmm. we are done with the inode, and in the process of freeing
2646 * the state_owner. we keep this around to process errors
2647 */
1da177e4
LT		 2648 switch (task->tk_status) {
2649 case 0:
412f6c4c
TM		 2650 res_stateid = &calldata->res.stateid;
2651 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2652 pnfs_roc_set_barrier(state->inode,
2653 calldata->roc_barrier);
26e976a8 2654 renew_lease(server, calldata->timestamp);
412f6c4c 2655 break;
69794ad7 2656 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2657 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2658 case -NFS4ERR_OLD_STATEID:
2659 case -NFS4ERR_BAD_STATEID:
1da177e4 2660 case -NFS4ERR_EXPIRED:
566fcec6 2661 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2662 &state->open_stateid)) {
566fcec6
TM		 2663 rpc_restart_call_prepare(task);
2664 goto out_release;
2665 }
dc0b027d 2666 if (calldata->arg.fmode == 0)
9e33bed5 2667 break;
1da177e4 2668 default:
8478eaa1 2669 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2670 rpc_restart_call_prepare(task);
69794ad7
TM		 2671 goto out_release;
2672 }
1da177e4 2673 }
412f6c4c 2674 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2675out_release:
72211dbe 2676 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2677 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2678 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2679}
2680
4ce70ada 2681static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2682{
4ce70ada 2683 struct nfs4_closedata *calldata = data;
9512135d 2684 struct nfs4_state *state = calldata->state;
7fdab069 2685 struct inode *inode = calldata->inode;
aee7af35 2686 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2687 int call_close = 0;
9512135d 2688
a3ca5651 2689 dprintk("%s: begin!\n", __func__);
963d8fe5 2690 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2691 goto out_wait;
003707c7 2692
88069f77 2693 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2694 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2695 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2696 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2697 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2698 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2699 /* Calculate the change in open mode */
cd9288ff 2700 calldata->arg.fmode = 0;
e7616923 2701 if (state->n_rdwr == 0) {
cd9288ff
TM		 2702 if (state->n_rdonly == 0)
2703 call_close |= is_rdonly;
2704 else if (is_rdonly)
2705 calldata->arg.fmode |= FMODE_READ;
2706 if (state->n_wronly == 0)
2707 call_close |= is_wronly;
2708 else if (is_wronly)
2709 calldata->arg.fmode |= FMODE_WRITE;
2710 } else if (is_rdwr)
2711 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2712
2713 if (calldata->arg.fmode == 0)
2714 call_close |= is_rdwr;
2715
5d422301
TM		 2716 if (!nfs4_valid_open_stateid(state))
2717 call_close = 0;
4cecb76f 2718 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2719
2720 if (!call_close) {
963d8fe5 2721 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2722 goto out_no_action;
9512135d 2723 }
88069f77 2724
f7e8917a 2725 if (calldata->arg.fmode == 0) {
88069f77 2726 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2727 if (calldata->roc &&
b9536ad5
AA		 2728 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2729 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2730 goto out_wait;
b9536ad5 2731 }
f7e8917a 2732 }
6ae37339
TM		 2733 calldata->arg.share_access =
2734 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2735 calldata->arg.fmode, 0);
88069f77 2736
516a6af6 2737 nfs_fattr_init(calldata->res.fattr);
26e976a8 2738 calldata->timestamp = jiffies;
7fdab069 2739 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2740 &calldata->arg.seq_args,
2741 &calldata->res.seq_res,
2240a9e2
TM		 2742 task) != 0)
2743 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2744 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2745 return;
2746out_no_action:
2747 task->tk_action = NULL;
2748out_wait:
2749 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2750}
2751
963d8fe5 2752static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2753 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2754 .rpc_call_done = nfs4_close_done,
2755 .rpc_release = nfs4_free_closedata,
2756};
2757
fe08c546
PT		 2758static bool nfs4_roc(struct inode *inode)
2759{
40dd4b7a 2760 if (!nfs_have_layout(inode))
fe08c546 2761 return false;
fe08c546
PT		 2762 return pnfs_roc(inode);
2763}
2764
1da177e4
LT		 2765/*
2766 * It is possible for data to be read/written from a mem-mapped file
2767 * after the sys_close call (which hits the vfs layer as a flush).
2768 * This means that we can't safely call nfsv4 close on a file until
2769 * the inode is cleared. This in turn means that we are not good
2770 * NFSv4 citizens - we do not indicate to the server to update the file's
2771 * share state even when we are done with one of the three share
2772 * stateid's in the inode.
2773 *
2774 * NOTE: Caller must be holding the sp->so_owner semaphore!
2775 */
1f7977c1 2776int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2777{
4a35bd41 2778 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2779 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2780 struct nfs4_closedata *calldata;
b39e625b
TM		 2781 struct nfs4_state_owner *sp = state->owner;
2782 struct rpc_task *task;
5138fde0
TM		 2783 struct rpc_message msg = {
2784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2785 .rpc_cred = state->owner->so_cred,
2786 };
c970aa85
TM		 2787 struct rpc_task_setup task_setup_data = {
2788 .rpc_client = server->client,
5138fde0 2789 .rpc_message = &msg,
c970aa85 2790 .callback_ops = &nfs4_close_ops,
101070ca 2791 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2792 .flags = RPC_TASK_ASYNC,
2793 };
9512135d 2794 int status = -ENOMEM;
1da177e4 2795
fa940720
WAA		 2796 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2797 &task_setup_data.rpc_client, &msg);
2798
8535b2be 2799 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2800 if (calldata == NULL)
9512135d 2801 goto out;
a9c92d6b 2802 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2803 calldata->inode = state->inode;
1da177e4 2804 calldata->state = state;
4a35bd41 2805 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2806 /* Serialization for the sequence id */
63f5f796
TM		 2807 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2808 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2809 if (IS_ERR(calldata->arg.seqid))
9512135d 2810 goto out_free_calldata;
dc0b027d 2811 calldata->arg.fmode = 0;
a65318bf 2812 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2813 calldata->res.fattr = &calldata->fattr;
c1d51931 2814 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2815 calldata->res.server = server;
fe08c546 2816 calldata->roc = nfs4_roc(state->inode);
643168c2 2817 nfs_sb_active(calldata->inode->i_sb);
9512135d 2818
1174dd1f
TM		 2819 msg.rpc_argp = &calldata->arg;
2820 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2821 task_setup_data.callback_data = calldata;
2822 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2823 if (IS_ERR(task))
2824 return PTR_ERR(task);
a49c3c77
TM		 2825 status = 0;
2826 if (wait)
2827 status = rpc_wait_for_completion_task(task);
b39e625b 2828 rpc_put_task(task);
a49c3c77 2829 return status;
9512135d
TM		 2830out_free_calldata:
2831 kfree(calldata);
2832out:
b39e625b
TM		 2833 nfs4_put_open_state(state);
2834 nfs4_put_state_owner(sp);
9512135d 2835 return status;
1da177e4
LT		 2836}
2837
2b484297 2838static struct inode *
5bc2afc2
TM		 2839nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2840 int open_flags, struct iattr *attr, int *opened)
1da177e4 2841{
1da177e4 2842 struct nfs4_state *state;
aa9c2669
DQ		 2843 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2844
2845 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2846
565277f6 2847 /* Protect against concurrent sillydeletes */
5bc2afc2 2848 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2849
2850 nfs4_label_release_security(label);
2851
f46e0bd3
TM		 2852 if (IS_ERR(state))
2853 return ERR_CAST(state);
275bb307 2854 return state->inode;
1da177e4
LT		 2855}
2856
1185a552 2857static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2858{
2859 if (ctx->state == NULL)
2860 return;
2861 if (is_sync)
643168c2 2862 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2863 else
643168c2 2864 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2865}
1da177e4 2866
b944dba3
TM		 2867#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2868#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2869#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2870
1da177e4
LT		 2871static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2872{
43652ad5
BH		 2873 struct nfs4_server_caps_arg args = {
2874 .fhandle = fhandle,
2875 };
1da177e4
LT		 2876 struct nfs4_server_caps_res res = {};
2877 struct rpc_message msg = {
2878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2879 .rpc_argp = &args,
1da177e4
LT		 2880 .rpc_resp = &res,
2881 };
2882 int status;
2883
7c513058 2884 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2885 if (status == 0) {
b944dba3
TM		 2886 /* Sanity check the server answers */
2887 switch (server->nfs_client->cl_minorversion) {
2888 case 0:
2889 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2890 res.attr_bitmask[2] = 0;
2891 break;
2892 case 1:
2893 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2894 break;
2895 case 2:
2896 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2897 }
1da177e4 2898 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2899 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2900 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2901 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2902 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2903 NFS_CAP_CTIME|NFS_CAP_MTIME|
2904 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2905 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2906 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2907 server->caps |= NFS_CAP_ACLS;
2908 if (res.has_links != 0)
2909 server->caps |= NFS_CAP_HARDLINKS;
2910 if (res.has_symlinks != 0)
2911 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2912 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2913 server->caps |= NFS_CAP_FILEID;
2914 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2915 server->caps |= NFS_CAP_MODE;
2916 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2917 server->caps |= NFS_CAP_NLINK;
2918 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2919 server->caps |= NFS_CAP_OWNER;
2920 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2921 server->caps |= NFS_CAP_OWNER_GROUP;
2922 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2923 server->caps |= NFS_CAP_ATIME;
2924 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2925 server->caps |= NFS_CAP_CTIME;
2926 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2927 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2928#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2929 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2930 server->caps |= NFS_CAP_SECURITY_LABEL;
2931#endif
2932 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2933 sizeof(server->attr_bitmask));
b944dba3 2934 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2935
a65318bf
TM		 2936 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2937 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2938 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2939 server->cache_consistency_bitmask[2] = 0;
1da177e4 2940 server->acl_bitmask = res.acl_bitmask;
264e6351 2941 server->fh_expire_type = res.fh_expire_type;
1da177e4 2942 }
cccef3b9 2943
1da177e4
LT		 2944 return status;
2945}
2946
55a97593 2947int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2948{
2949 struct nfs4_exception exception = { };
2950 int err;
2951 do {
2952 err = nfs4_handle_exception(server,
2953 _nfs4_server_capabilities(server, fhandle),
2954 &exception);
2955 } while (exception.retry);
2956 return err;
2957}
2958
2959static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2960 struct nfs_fsinfo *info)
2961{
aa9c2669 2962 u32 bitmask[3];
1da177e4 2963 struct nfs4_lookup_root_arg args = {
aa9c2669 2964 .bitmask = bitmask,
1da177e4
LT		 2965 };
2966 struct nfs4_lookup_res res = {
2967 .server = server,
0e574af1 2968 .fattr = info->fattr,
1da177e4
LT		 2969 .fh = fhandle,
2970 };
2971 struct rpc_message msg = {
2972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2973 .rpc_argp = &args,
2974 .rpc_resp = &res,
2975 };
008f55d0 2976
aa9c2669
DQ		 2977 bitmask[0] = nfs4_fattr_bitmap[0];
2978 bitmask[1] = nfs4_fattr_bitmap[1];
2979 /*
2980 * Process the label in the upcoming getfattr
2981 */
2982 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2983
0e574af1 2984 nfs_fattr_init(info->fattr);
7c513058 2985 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2986}
2987
2988static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2989 struct nfs_fsinfo *info)
2990{
2991 struct nfs4_exception exception = { };
2992 int err;
2993 do {
fb8a5ba8 2994 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2995 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2996 switch (err) {
2997 case 0:
2998 case -NFS4ERR_WRONGSEC:
05e9cfb4 2999 goto out;
fb8a5ba8
BS		 3000 default:
3001 err = nfs4_handle_exception(server, err, &exception);
3002 }
1da177e4 3003 } while (exception.retry);
05e9cfb4 3004out:
1da177e4
LT		 3005 return err;
3006}
3007
8f70e95f
BS		 3008static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3009 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3010{
c2190661
TM		 3011 struct rpc_auth_create_args auth_args = {
3012 .pseudoflavor = flavor,
3013 };
8f70e95f
BS		 3014 struct rpc_auth *auth;
3015 int ret;
3016
c2190661 3017 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3018 if (IS_ERR(auth)) {
75bc8821 3019 ret = -EACCES;
8f70e95f
BS		 3020 goto out;
3021 }
3022 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3023out:
3024 return ret;
3025}
3026
9a744ba3
CL		 3027/*
3028 * Retry pseudoroot lookup with various security flavors. We do this when:
3029 *
3030 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3031 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3032 *
3033 * Returns zero on success, or a negative NFS4ERR value, or a
3034 * negative errno value.
3035 */
801a16dc 3036static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3037 struct nfs_fsinfo *info)
1da177e4 3038{
9a744ba3
CL		 3039 /* Per 3530bis 15.33.5 */
3040 static const rpc_authflavor_t flav_array[] = {
3041 RPC_AUTH_GSS_KRB5P,
3042 RPC_AUTH_GSS_KRB5I,
3043 RPC_AUTH_GSS_KRB5,
c4eafe11 3044 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3045 RPC_AUTH_NULL,
3046 };
3047 int status = -EPERM;
3048 size_t i;
6a1a1e34 3049
4d4b69dd
WAA		 3050 if (server->auth_info.flavor_len > 0) {
3051 /* try each flavor specified by user */
3052 for (i = 0; i < server->auth_info.flavor_len; i++) {
3053 status = nfs4_lookup_root_sec(server, fhandle, info,
3054 server->auth_info.flavors[i]);
3055 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3056 continue;
3057 break;
3058 }
3059 } else {
3060 /* no flavors specified by user, try default list */
3061 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3062 status = nfs4_lookup_root_sec(server, fhandle, info,
3063 flav_array[i]);
3064 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3065 continue;
3066 break;
3067 }
8f70e95f 3068 }
9a744ba3 3069
fb8a5ba8
BS		 3070 /*
3071 * -EACCESS could mean that the user doesn't have correct permissions
3072 * to access the mount. It could also mean that we tried to mount
3073 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3074 * existing mount programs don't handle -EACCES very well so it should
3075 * be mapped to -EPERM instead.
3076 */
3077 if (status == -EACCES)
3078 status = -EPERM;
801a16dc
BS		 3079 return status;
3080}
3081
2ed4b95b
CL		 3082static int nfs4_do_find_root_sec(struct nfs_server *server,
3083 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3084{
3085 int mv = server->nfs_client->cl_minorversion;
3086 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3087}
3088
3089/**
3090 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3091 * @server: initialized nfs_server handle
3092 * @fhandle: we fill in the pseudo-fs root file handle
3093 * @info: we fill in an FSINFO struct
5e6b1990 3094 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3095 *
3096 * Returns zero on success, or a negative errno.
801a16dc 3097 */
3028eb2b 3098int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3099 struct nfs_fsinfo *info,
3100 bool auth_probe)
801a16dc 3101{
c7757074 3102 int status = 0;
2ed4b95b 3103
c7757074 3104 if (!auth_probe)
5e6b1990 3105 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3106
3107 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3108 status = nfs4_do_find_root_sec(server, fhandle, info);
3109
1da177e4
LT		 3110 if (status == 0)
3111 status = nfs4_server_capabilities(server, fhandle);
3112 if (status == 0)
3113 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3114
c12e87f4 3115 return nfs4_map_errors(status);
1da177e4
LT		 3116}
3117
bae36241
BS		 3118static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3119 struct nfs_fsinfo *info)
3120{
3121 int error;
3122 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3123 struct nfs4_label *label = NULL;
bae36241
BS		 3124
3125 error = nfs4_server_capabilities(server, mntfh);
3126 if (error < 0) {
3127 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3128 return error;
3129 }
3130
14c43f76
DQ		 3131 label = nfs4_label_alloc(server, GFP_KERNEL);
3132 if (IS_ERR(label))
3133 return PTR_ERR(label);
3134
1775fd3e 3135 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3136 if (error < 0) {
3137 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3138 goto err_free_label;
bae36241
BS		 3139 }
3140
3141 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3142 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3143 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3144
14c43f76
DQ		 3145err_free_label:
3146 nfs4_label_free(label);
3147
bae36241
BS		 3148 return error;
3149}
3150
6b97fd3d
MN		 3151/*
3152 * Get locations and (maybe) other attributes of a referral.
3153 * Note that we'll actually follow the referral later when
3154 * we detect fsid mismatch in inode revalidation
3155 */
f05d147f
BS		 3156static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3157 const struct qstr *name, struct nfs_fattr *fattr,
3158 struct nfs_fh *fhandle)
6b97fd3d
MN		 3159{
3160 int status = -ENOMEM;
3161 struct page *page = NULL;
3162 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3163
3164 page = alloc_page(GFP_KERNEL);
3165 if (page == NULL)
3166 goto out;
3167 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3168 if (locations == NULL)
3169 goto out;
3170
f05d147f 3171 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3172 if (status != 0)
3173 goto out;
519ae255
CL		 3174
3175 /*
3176 * If the fsid didn't change, this is a migration event, not a
3177 * referral. Cause us to drop into the exception handler, which
3178 * will kick off migration recovery.
3179 */
6b97fd3d 3180 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3181 dprintk("%s: server did not return a different fsid for"
3182 " a referral at %s\n", __func__, name->name);
519ae255 3183 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3184 goto out;
3185 }
533eb461
AA		 3186 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3187 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3188
533eb461 3189 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3190 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3191 memset(fhandle, 0, sizeof(struct nfs_fh));
3192out:
3193 if (page)
3194 __free_page(page);
5d7ca35a 3195 kfree(locations);
6b97fd3d
MN		 3196 return status;
3197}
3198
1775fd3e
DQ		 3199static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3200 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3201{
3202 struct nfs4_getattr_arg args = {
3203 .fh = fhandle,
3204 .bitmask = server->attr_bitmask,
3205 };
3206 struct nfs4_getattr_res res = {
3207 .fattr = fattr,
1775fd3e 3208 .label = label,
1da177e4
LT		 3209 .server = server,
3210 };
3211 struct rpc_message msg = {
3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3213 .rpc_argp = &args,
3214 .rpc_resp = &res,
3215 };
aa9c2669
DQ		 3216
3217 args.bitmask = nfs4_bitmask(server, label);
3218
0e574af1 3219 nfs_fattr_init(fattr);
7c513058 3220 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3221}
3222
1775fd3e
DQ		 3223static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3224 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3225{
3226 struct nfs4_exception exception = { };
3227 int err;
3228 do {
b5f875a9
TM		 3229 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3230 trace_nfs4_getattr(server, fhandle, fattr, err);
3231 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3232 &exception);
3233 } while (exception.retry);
3234 return err;
3235}
3236
3237/*
3238 * The file is not closed if it is opened due to the a request to change
3239 * the size of the file. The open call will not be needed once the
3240 * VFS layer lookup-intents are implemented.
3241 *
3242 * Close is called when the inode is destroyed.
3243 * If we haven't opened the file for O_WRONLY, we
3244 * need to in the size_change case to obtain a stateid.
3245 *
3246 * Got race?
3247 * Because OPEN is always done by name in nfsv4, it is
3248 * possible that we opened a different file by the same
3249 * name. We can recognize this race condition, but we
3250 * can't do anything about it besides returning an error.
3251 *
3252 * This will be fixed with VFS changes (lookup-intent).
3253 */
3254static int
3255nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3256 struct iattr *sattr)
3257{
2b0143b5 3258 struct inode *inode = d_inode(dentry);
659bfcd6 3259 struct rpc_cred *cred = NULL;
d530838b 3260 struct nfs4_state *state = NULL;
14c43f76 3261 struct nfs4_label *label = NULL;
1da177e4
LT		 3262 int status;
3263
88ac815c
PT		 3264 if (pnfs_ld_layoutret_on_setattr(inode) &&
3265 sattr->ia_valid & ATTR_SIZE &&
3266 sattr->ia_size < i_size_read(inode))
24028672 3267 pnfs_commit_and_return_layout(inode);
8a1636c4 3268
0e574af1 3269 nfs_fattr_init(fattr);
1da177e4 3270
2669940d
AA		 3271 /* Deal with open(O_TRUNC) */
3272 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3273 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3274
3275 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3276 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3277 return 0;
3278
d530838b 3279 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3280 if (sattr->ia_valid & ATTR_FILE) {
3281 struct nfs_open_context *ctx;
3282
3283 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3284 if (ctx) {
3285 cred = ctx->cred;
3286 state = ctx->state;
3287 }
659bfcd6 3288 }
08e9eac4 3289
14c43f76
DQ		 3290 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3291 if (IS_ERR(label))
3292 return PTR_ERR(label);
3293
3294 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3295 if (status == 0) {
f044636d 3296 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3297 nfs_setsecurity(inode, fattr, label);
3298 }
14c43f76 3299 nfs4_label_free(label);
1da177e4
LT		 3300 return status;
3301}
3302
0c2e53f1
TM		 3303static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3304 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3305 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3306{
0c2e53f1 3307 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3308 int status;
3309 struct nfs4_lookup_arg args = {
3310 .bitmask = server->attr_bitmask,
0c2e53f1 3311 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3312 .name = name,
3313 };
3314 struct nfs4_lookup_res res = {
3315 .server = server,
3316 .fattr = fattr,
aa9c2669 3317 .label = label,
2b3de441
DH		 3318 .fh = fhandle,
3319 };
3320 struct rpc_message msg = {
3321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3322 .rpc_argp = &args,
3323 .rpc_resp = &res,
3324 };
3325
aa9c2669
DQ		 3326 args.bitmask = nfs4_bitmask(server, label);
3327
2b3de441
DH		 3328 nfs_fattr_init(fattr);
3329
1da177e4 3330 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3331 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3332 dprintk("NFS reply lookup: %d\n", status);
3333 return status;
3334}
3335
72de53ec 3336static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3337{
7ebb9315 3338 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3339 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3340 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3341 fattr->nlink = 2;
3342}
3343
72de53ec
BS		 3344static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3345 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3346 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3347{
3348 struct nfs4_exception exception = { };
72de53ec 3349 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3350 int err;
3351 do {
1775fd3e 3352 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3353 trace_nfs4_lookup(dir, name, err);
72de53ec 3354 switch (err) {
08ef7bd3 3355 case -NFS4ERR_BADNAME:
72de53ec
BS		 3356 err = -ENOENT;
3357 goto out;
0c2e53f1 3358 case -NFS4ERR_MOVED:
f05d147f 3359 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3360 if (err == -NFS4ERR_MOVED)
3361 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3362 goto out;
0c2e53f1 3363 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3364 err = -EPERM;
3365 if (client != *clnt)
3366 goto out;
66b06860 3367 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3368 if (IS_ERR(client))
3369 return PTR_ERR(client);
3370
3371 exception.retry = 1;
3372 break;
3373 default:
3374 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3375 }
1da177e4 3376 } while (exception.retry);
72de53ec
BS		 3377
3378out:
3379 if (err == 0)
3380 *clnt = client;
3381 else if (client != *clnt)
3382 rpc_shutdown_client(client);
3383
1da177e4
LT		 3384 return err;
3385}
3386
80a16b21 3387static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3388 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3389 struct nfs4_label *label)
72de53ec
BS		 3390{
3391 int status;
3392 struct rpc_clnt *client = NFS_CLIENT(dir);
3393
1775fd3e 3394 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3395 if (client != NFS_CLIENT(dir)) {
3396 rpc_shutdown_client(client);
3397 nfs_fixup_secinfo_attributes(fattr);
3398 }
3399 return status;
3400}
3401
f05d147f
BS		 3402struct rpc_clnt *
3403nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3404 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3405{
b72888cb 3406 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3407 int status;
f05d147f 3408
1775fd3e 3409 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3410 if (status < 0)
f05d147f 3411 return ERR_PTR(status);
b72888cb 3412 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3413}
3414
1da177e4
LT		 3415static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3416{
76b32999 3417 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3418 struct nfs4_accessargs args = {
3419 .fh = NFS_FH(inode),
a4980e78 3420 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3421 };
3422 struct nfs4_accessres res = {
3423 .server = server,
1da177e4 3424 };
1da177e4
LT		 3425 struct rpc_message msg = {
3426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3427 .rpc_argp = &args,
3428 .rpc_resp = &res,
3429 .rpc_cred = entry->cred,
3430 };
3431 int mode = entry->mask;
aa9c2669 3432 int status = 0;
1da177e4
LT		 3433
3434 /*
3435 * Determine which access bits we want to ask for...
3436 */
3437 if (mode & MAY_READ)
3438 args.access |= NFS4_ACCESS_READ;
3439 if (S_ISDIR(inode->i_mode)) {
3440 if (mode & MAY_WRITE)
3441 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3442 if (mode & MAY_EXEC)
3443 args.access |= NFS4_ACCESS_LOOKUP;
3444 } else {
3445 if (mode & MAY_WRITE)
3446 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3447 if (mode & MAY_EXEC)
3448 args.access |= NFS4_ACCESS_EXECUTE;
3449 }
c407d41a
TM		 3450
3451 res.fattr = nfs_alloc_fattr();
3452 if (res.fattr == NULL)
3453 return -ENOMEM;
3454
7c513058 3455 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3456 if (!status) {
6168f62c 3457 nfs_access_set_mask(entry, res.access);
c407d41a 3458 nfs_refresh_inode(inode, res.fattr);
1da177e4 3459 }
c407d41a 3460 nfs_free_fattr(res.fattr);
1da177e4
LT		 3461 return status;
3462}
3463
3464static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3465{
3466 struct nfs4_exception exception = { };
3467 int err;
3468 do {
c1578b76
TM		 3469 err = _nfs4_proc_access(inode, entry);
3470 trace_nfs4_access(inode, err);
3471 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3472 &exception);
3473 } while (exception.retry);
3474 return err;
3475}
3476
3477/*
3478 * TODO: For the time being, we don't try to get any attributes
3479 * along with any of the zero-copy operations READ, READDIR,
3480 * READLINK, WRITE.
3481 *
3482 * In the case of the first three, we want to put the GETATTR
3483 * after the read-type operation -- this is because it is hard
3484 * to predict the length of a GETATTR response in v4, and thus
3485 * align the READ data correctly. This means that the GETATTR
3486 * may end up partially falling into the page cache, and we should
3487 * shift it into the 'tail' of the xdr_buf before processing.
3488 * To do this efficiently, we need to know the total length
3489 * of data received, which doesn't seem to be available outside
3490 * of the RPC layer.
3491 *
3492 * In the case of WRITE, we also want to put the GETATTR after
3493 * the operation -- in this case because we want to make sure
140150db 3494 * we get the post-operation mtime and size.
1da177e4
LT		 3495 *
3496 * Both of these changes to the XDR layer would in fact be quite
3497 * minor, but I decided to leave them for a subsequent patch.
3498 */
3499static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3500 unsigned int pgbase, unsigned int pglen)
3501{
3502 struct nfs4_readlink args = {
3503 .fh = NFS_FH(inode),
3504 .pgbase = pgbase,
3505 .pglen = pglen,
3506 .pages = &page,
3507 };
f50c7000 3508 struct nfs4_readlink_res res;
1da177e4
LT		 3509 struct rpc_message msg = {
3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3511 .rpc_argp = &args,
f50c7000 3512 .rpc_resp = &res,
1da177e4
LT		 3513 };
3514
7c513058 3515 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3516}
3517
3518static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3519 unsigned int pgbase, unsigned int pglen)
3520{
3521 struct nfs4_exception exception = { };
3522 int err;
3523 do {
c1578b76
TM		 3524 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3525 trace_nfs4_readlink(inode, err);
3526 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3527 &exception);
3528 } while (exception.retry);
3529 return err;
3530}
3531
1da177e4 3532/*
8867fe58 3533 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3534 */
1da177e4
LT		 3535static int
3536nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3537 int flags)
1da177e4 3538{
aa9c2669 3539 struct nfs4_label l, *ilabel = NULL;
8867fe58 3540 struct nfs_open_context *ctx;
1da177e4 3541 struct nfs4_state *state;
5bc2afc2 3542 int opened = 0;
1da177e4
LT		 3543 int status = 0;
3544
8867fe58
MS		 3545 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3546 if (IS_ERR(ctx))
3547 return PTR_ERR(ctx);
3548
aa9c2669
DQ		 3549 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3550
a8a5da99 3551 sattr->ia_mode &= ~current_umask();
5bc2afc2 3552 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3553 if (IS_ERR(state)) {
3554 status = PTR_ERR(state);
c0204fd2 3555 goto out;
1da177e4 3556 }
1da177e4 3557out:
aa9c2669 3558 nfs4_label_release_security(ilabel);
8867fe58 3559 put_nfs_open_context(ctx);
1da177e4
LT		 3560 return status;
3561}
3562
3563static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3564{
16e42959 3565 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3566 struct nfs_removeargs args = {
1da177e4 3567 .fh = NFS_FH(dir),
26fe5750 3568 .name = *name,
16e42959 3569 };
4fdc17b2 3570 struct nfs_removeres res = {
16e42959 3571 .server = server,
1da177e4 3572 };
1da177e4 3573 struct rpc_message msg = {
4fdc17b2
TM		 3574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3575 .rpc_argp = &args,
3576 .rpc_resp = &res,
1da177e4 3577 };
778d2817 3578 int status;
1da177e4 3579
7c513058 3580 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3581 if (status == 0)
16e42959 3582 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3583 return status;
3584}
3585
3586static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3587{
3588 struct nfs4_exception exception = { };
3589 int err;
3590 do {
078ea3df
TM		 3591 err = _nfs4_proc_remove(dir, name);
3592 trace_nfs4_remove(dir, name, err);
3593 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3594 &exception);
3595 } while (exception.retry);
3596 return err;
3597}
3598
e4eff1a6 3599static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3600{
e4eff1a6
TM		 3601 struct nfs_server *server = NFS_SERVER(dir);
3602 struct nfs_removeargs *args = msg->rpc_argp;
3603 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3604
e4eff1a6 3605 res->server = server;
1da177e4 3606 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3607 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3608
3609 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3610}
3611
34e137cc
BS		 3612static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3613{
d9afbd1b
TM		 3614 nfs4_setup_sequence(NFS_SERVER(data->dir),
3615 &data->args.seq_args,
3616 &data->res.seq_res,
3617 task);
1da177e4
LT		 3618}
3619
e4eff1a6 3620static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3621{
078ea3df
TM		 3622 struct nfs_unlinkdata *data = task->tk_calldata;
3623 struct nfs_removeres *res = &data->res;
e4eff1a6 3624
14516c3a
TM		 3625 if (!nfs4_sequence_done(task, &res->seq_res))
3626 return 0;
8478eaa1
N		 3627 if (nfs4_async_handle_error(task, res->server, NULL,
3628 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3629 return 0;
3630 update_changeattr(dir, &res->cinfo);
e4eff1a6 3631 return 1;
1da177e4
LT		 3632}
3633
d3d4152a
JL		 3634static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3635{
3636 struct nfs_server *server = NFS_SERVER(dir);
3637 struct nfs_renameargs *arg = msg->rpc_argp;
3638 struct nfs_renameres *res = msg->rpc_resp;
3639
3640 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3641 res->server = server;
a9c92d6b 3642 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3643}
3644
c6bfa1a1
BS		 3645static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3646{
d9afbd1b
TM		 3647 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3648 &data->args.seq_args,
3649 &data->res.seq_res,
3650 task);
d3d4152a
JL		 3651}
3652
3653static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3654 struct inode *new_dir)
3655{
fbc6f7c2
TM		 3656 struct nfs_renamedata *data = task->tk_calldata;
3657 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3658
3659 if (!nfs4_sequence_done(task, &res->seq_res))
3660 return 0;
8478eaa1 3661 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3662 return 0;
3663
3664 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3665 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3666 return 1;
3667}
3668
1da177e4
LT		 3669static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3670{
91ba2eee 3671 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3672 struct nfs4_link_arg arg = {
3673 .fh = NFS_FH(inode),
3674 .dir_fh = NFS_FH(dir),
3675 .name = name,
91ba2eee
TM		 3676 .bitmask = server->attr_bitmask,
3677 };
91ba2eee
TM		 3678 struct nfs4_link_res res = {
3679 .server = server,
1775fd3e 3680 .label = NULL,
1da177e4 3681 };
1da177e4
LT		 3682 struct rpc_message msg = {
3683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3684 .rpc_argp = &arg,
91ba2eee 3685 .rpc_resp = &res,
1da177e4 3686 };
136f2627
TM		 3687 int status = -ENOMEM;
3688
3689 res.fattr = nfs_alloc_fattr();
778d2817 3690 if (res.fattr == NULL)
136f2627 3691 goto out;
1da177e4 3692
14c43f76
DQ		 3693 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3694 if (IS_ERR(res.label)) {
3695 status = PTR_ERR(res.label);
3696 goto out;
3697 }
aa9c2669 3698 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3699
7c513058 3700 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3701 if (!status) {
3702 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3703 status = nfs_post_op_update_inode(inode, res.fattr);
3704 if (!status)
3705 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3706 }
14c43f76
DQ		 3707
3708
3709 nfs4_label_free(res.label);
3710
136f2627 3711out:
136f2627 3712 nfs_free_fattr(res.fattr);
1da177e4
LT		 3713 return status;
3714}
3715
3716static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3717{
3718 struct nfs4_exception exception = { };
3719 int err;
3720 do {
3721 err = nfs4_handle_exception(NFS_SERVER(inode),
3722 _nfs4_proc_link(inode, dir, name),
3723 &exception);
3724 } while (exception.retry);
3725 return err;
3726}
3727
57dc9a57
TM		 3728struct nfs4_createdata {
3729 struct rpc_message msg;
3730 struct nfs4_create_arg arg;
3731 struct nfs4_create_res res;
3732 struct nfs_fh fh;
3733 struct nfs_fattr fattr;
1775fd3e 3734 struct nfs4_label *label;
57dc9a57
TM		 3735};
3736
3737static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3738 struct qstr *name, struct iattr *sattr, u32 ftype)
3739{
3740 struct nfs4_createdata *data;
3741
3742 data = kzalloc(sizeof(*data), GFP_KERNEL);
3743 if (data != NULL) {
3744 struct nfs_server *server = NFS_SERVER(dir);
3745
14c43f76
DQ		 3746 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3747 if (IS_ERR(data->label))
3748 goto out_free;
3749
57dc9a57
TM		 3750 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3751 data->msg.rpc_argp = &data->arg;
3752 data->msg.rpc_resp = &data->res;
3753 data->arg.dir_fh = NFS_FH(dir);
3754 data->arg.server = server;
3755 data->arg.name = name;
3756 data->arg.attrs = sattr;
3757 data->arg.ftype = ftype;
aa9c2669 3758 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3759 data->res.server = server;
3760 data->res.fh = &data->fh;
3761 data->res.fattr = &data->fattr;
1775fd3e 3762 data->res.label = data->label;
57dc9a57 3763 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3764 }
3765 return data;
14c43f76
DQ		 3766out_free:
3767 kfree(data);
3768 return NULL;
57dc9a57
TM		 3769}
3770
3771static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3772{
7c513058 3773 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3774 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3775 if (status == 0) {
3776 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3777 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3778 }
3779 return status;
3780}
3781
3782static void nfs4_free_createdata(struct nfs4_createdata *data)
3783{
14c43f76 3784 nfs4_label_free(data->label);
57dc9a57
TM		 3785 kfree(data);
3786}
3787
4f390c15 3788static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3789 struct page *page, unsigned int len, struct iattr *sattr,
3790 struct nfs4_label *label)
1da177e4 3791{
57dc9a57
TM		 3792 struct nfs4_createdata *data;
3793 int status = -ENAMETOOLONG;
1da177e4 3794
94a6d753 3795 if (len > NFS4_MAXPATHLEN)
57dc9a57 3796 goto out;
4f390c15 3797
57dc9a57
TM		 3798 status = -ENOMEM;
3799 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3800 if (data == NULL)
3801 goto out;
3802
3803 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3804 data->arg.u.symlink.pages = &page;
3805 data->arg.u.symlink.len = len;
1775fd3e 3806 data->arg.label = label;
1da177e4 3807
57dc9a57
TM		 3808 status = nfs4_do_create(dir, dentry, data);
3809
3810 nfs4_free_createdata(data);
3811out:
1da177e4
LT		 3812 return status;
3813}
3814
4f390c15 3815static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3816 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3817{
3818 struct nfs4_exception exception = { };
aa9c2669 3819 struct nfs4_label l, *label = NULL;
1da177e4 3820 int err;
aa9c2669
DQ		 3821
3822 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3823
1da177e4 3824 do {
078ea3df
TM		 3825 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3826 trace_nfs4_symlink(dir, &dentry->d_name, err);
3827 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3828 &exception);
3829 } while (exception.retry);
aa9c2669
DQ		 3830
3831 nfs4_label_release_security(label);
1da177e4
LT		 3832 return err;
3833}
3834
3835static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3836 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3837{
57dc9a57
TM		 3838 struct nfs4_createdata *data;
3839 int status = -ENOMEM;
1da177e4 3840
57dc9a57
TM		 3841 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3842 if (data == NULL)
3843 goto out;
3844
1775fd3e 3845 data->arg.label = label;
57dc9a57
TM		 3846 status = nfs4_do_create(dir, dentry, data);
3847
3848 nfs4_free_createdata(data);
3849out:
1da177e4
LT		 3850 return status;
3851}
3852
3853static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3854 struct iattr *sattr)
3855{
3856 struct nfs4_exception exception = { };
aa9c2669 3857 struct nfs4_label l, *label = NULL;
1da177e4 3858 int err;
a8a5da99 3859
aa9c2669
DQ		 3860 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3861
a8a5da99 3862 sattr->ia_mode &= ~current_umask();
1da177e4 3863 do {
078ea3df
TM		 3864 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3865 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3866 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3867 &exception);
3868 } while (exception.retry);
aa9c2669
DQ		 3869 nfs4_label_release_security(label);
3870
1da177e4
LT		 3871 return err;
3872}
3873
3874static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3875 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3876{
2b0143b5 3877 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3878 struct nfs4_readdir_arg args = {
3879 .fh = NFS_FH(dir),
56e4ebf8 3880 .pages = pages,
1da177e4
LT		 3881 .pgbase = 0,
3882 .count = count,
2b0143b5 3883 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3884 .plus = plus,
1da177e4
LT		 3885 };
3886 struct nfs4_readdir_res res;
3887 struct rpc_message msg = {
3888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3889 .rpc_argp = &args,
3890 .rpc_resp = &res,
3891 .rpc_cred = cred,
3892 };
3893 int status;
3894
6de1472f
AV		 3895 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3896 dentry,
eadf4598 3897 (unsigned long long)cookie);
c3f52af3 3898 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3899 res.pgbase = args.pgbase;
7c513058 3900 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3901 if (status >= 0) {
c3f52af3 3902 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3903 status += args.pgbase;
3904 }
c4812998
TM		 3905
3906 nfs_invalidate_atime(dir);
3907
3110ff80 3908 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3909 return status;
3910}
3911
3912static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3913 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3914{
3915 struct nfs4_exception exception = { };
3916 int err;
3917 do {
c1578b76
TM		 3918 err = _nfs4_proc_readdir(dentry, cred, cookie,
3919 pages, count, plus);
2b0143b5
DH		 3920 trace_nfs4_readdir(d_inode(dentry), err);
3921 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3922 &exception);
3923 } while (exception.retry);
3924 return err;
3925}
3926
3927static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3928 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3929{
57dc9a57
TM		 3930 struct nfs4_createdata *data;
3931 int mode = sattr->ia_mode;
3932 int status = -ENOMEM;
1da177e4 3933
57dc9a57
TM		 3934 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3935 if (data == NULL)
3936 goto out;
3937
1da177e4 3938 if (S_ISFIFO(mode))
57dc9a57 3939 data->arg.ftype = NF4FIFO;
1da177e4 3940 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3941 data->arg.ftype = NF4BLK;
3942 data->arg.u.device.specdata1 = MAJOR(rdev);
3943 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3944 }
3945 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3946 data->arg.ftype = NF4CHR;
3947 data->arg.u.device.specdata1 = MAJOR(rdev);
3948 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3949 } else if (!S_ISSOCK(mode)) {
3950 status = -EINVAL;
3951 goto out_free;
1da177e4 3952 }
1775fd3e 3953
aa9c2669 3954 data->arg.label = label;
57dc9a57 3955 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3956out_free:
57dc9a57
TM		 3957 nfs4_free_createdata(data);
3958out:
1da177e4
LT		 3959 return status;
3960}
3961
3962static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3963 struct iattr *sattr, dev_t rdev)
3964{
3965 struct nfs4_exception exception = { };
aa9c2669 3966 struct nfs4_label l, *label = NULL;
1da177e4 3967 int err;
a8a5da99 3968
aa9c2669
DQ		 3969 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3970
a8a5da99 3971 sattr->ia_mode &= ~current_umask();
1da177e4 3972 do {
078ea3df
TM		 3973 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3974 trace_nfs4_mknod(dir, &dentry->d_name, err);
3975 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3976 &exception);
3977 } while (exception.retry);
aa9c2669
DQ		 3978
3979 nfs4_label_release_security(label);
3980
1da177e4
LT		 3981 return err;
3982}
3983
3984static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3985 struct nfs_fsstat *fsstat)
3986{
3987 struct nfs4_statfs_arg args = {
3988 .fh = fhandle,
3989 .bitmask = server->attr_bitmask,
3990 };
24ad148a
BH		 3991 struct nfs4_statfs_res res = {
3992 .fsstat = fsstat,
3993 };
1da177e4
LT		 3994 struct rpc_message msg = {
3995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3996 .rpc_argp = &args,
24ad148a 3997 .rpc_resp = &res,
1da177e4
LT		 3998 };
3999
0e574af1 4000 nfs_fattr_init(fsstat->fattr);
7c513058 4001 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4002}
4003
4004static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4005{
4006 struct nfs4_exception exception = { };
4007 int err;
4008 do {
4009 err = nfs4_handle_exception(server,
4010 _nfs4_proc_statfs(server, fhandle, fsstat),
4011 &exception);
4012 } while (exception.retry);
4013 return err;
4014}
4015
4016static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4017 struct nfs_fsinfo *fsinfo)
4018{
4019 struct nfs4_fsinfo_arg args = {
4020 .fh = fhandle,
4021 .bitmask = server->attr_bitmask,
4022 };
3dda5e43
BH		 4023 struct nfs4_fsinfo_res res = {
4024 .fsinfo = fsinfo,
4025 };
1da177e4
LT		 4026 struct rpc_message msg = {
4027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4028 .rpc_argp = &args,
3dda5e43 4029 .rpc_resp = &res,
1da177e4
LT		 4030 };
4031
7c513058 4032 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4033}
4034
4035static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4036{
4037 struct nfs4_exception exception = { };
83ca7f5a 4038 unsigned long now = jiffies;
1da177e4
LT		 4039 int err;
4040
4041 do {
83ca7f5a 4042 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4043 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4044 if (err == 0) {
4045 struct nfs_client *clp = server->nfs_client;
4046
4047 spin_lock(&clp->cl_lock);
4048 clp->cl_lease_time = fsinfo->lease_time * HZ;
4049 clp->cl_last_renewal = now;
4050 spin_unlock(&clp->cl_lock);
4051 break;
4052 }
4053 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4054 } while (exception.retry);
4055 return err;
4056}
4057
4058static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4059{
e38eb650
BS		 4060 int error;
4061
0e574af1 4062 nfs_fattr_init(fsinfo->fattr);
e38eb650 4063 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4064 if (error == 0) {
4065 /* block layout checks this! */
4066 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4067 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4068 }
e38eb650
BS		 4069
4070 return error;
1da177e4
LT		 4071}
4072
4073static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4074 struct nfs_pathconf *pathconf)
4075{
4076 struct nfs4_pathconf_arg args = {
4077 .fh = fhandle,
4078 .bitmask = server->attr_bitmask,
4079 };
d45b2989
BH		 4080 struct nfs4_pathconf_res res = {
4081 .pathconf = pathconf,
4082 };
1da177e4
LT		 4083 struct rpc_message msg = {
4084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4085 .rpc_argp = &args,
d45b2989 4086 .rpc_resp = &res,
1da177e4
LT		 4087 };
4088
4089 /* None of the pathconf attributes are mandatory to implement */
4090 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4091 memset(pathconf, 0, sizeof(*pathconf));
4092 return 0;
4093 }
4094
0e574af1 4095 nfs_fattr_init(pathconf->fattr);
7c513058 4096 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4097}
4098
4099static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4100 struct nfs_pathconf *pathconf)
4101{
4102 struct nfs4_exception exception = { };
4103 int err;
4104
4105 do {
4106 err = nfs4_handle_exception(server,
4107 _nfs4_proc_pathconf(server, fhandle, pathconf),
4108 &exception);
4109 } while (exception.retry);
4110 return err;
4111}
4112
5521abfd 4113int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4114 const struct nfs_open_context *ctx,
4115 const struct nfs_lock_context *l_ctx,
4116 fmode_t fmode)
4117{
4118 const struct nfs_lockowner *lockowner = NULL;
4119
4120 if (l_ctx != NULL)
4121 lockowner = &l_ctx->lockowner;
5521abfd 4122 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4123}
4124EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4125
5521abfd
TM		 4126static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4127 const struct nfs_open_context *ctx,
4128 const struct nfs_lock_context *l_ctx,
4129 fmode_t fmode)
4130{
4131 nfs4_stateid current_stateid;
4132
e1253be0
TM		 4133 /* If the current stateid represents a lost lock, then exit */
4134 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4135 return true;
5521abfd
TM		 4136 return nfs4_stateid_match(stateid, &current_stateid);
4137}
4138
4139static bool nfs4_error_stateid_expired(int err)
4140{
4141 switch (err) {
4142 case -NFS4ERR_DELEG_REVOKED:
4143 case -NFS4ERR_ADMIN_REVOKED:
4144 case -NFS4ERR_BAD_STATEID:
4145 case -NFS4ERR_STALE_STATEID:
4146 case -NFS4ERR_OLD_STATEID:
4147 case -NFS4ERR_OPENMODE:
4148 case -NFS4ERR_EXPIRED:
4149 return true;
4150 }
4151 return false;
4152}
4153
d45f60c6 4154void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4155{
d45f60c6 4156 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4157}
4158
d45f60c6 4159static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4160{
d45f60c6 4161 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4162
d45f60c6
WAA		 4163 trace_nfs4_read(hdr, task->tk_status);
4164 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4165 hdr->args.context->state,
4166 NULL) == -EAGAIN) {
d00c5d43 4167 rpc_restart_call_prepare(task);
ec06c096 4168 return -EAGAIN;
1da177e4 4169 }
8850df99 4170
d45f60c6 4171 __nfs4_read_done_cb(hdr);
1da177e4 4172 if (task->tk_status > 0)
d45f60c6 4173 renew_lease(server, hdr->timestamp);
ec06c096 4174 return 0;
1da177e4
LT		 4175}
4176
5521abfd 4177static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4178 struct nfs_pgio_args *args)
5521abfd
TM		 4179{
4180
4181 if (!nfs4_error_stateid_expired(task->tk_status) ||
4182 nfs4_stateid_is_current(&args->stateid,
4183 args->context,
4184 args->lock_context,
4185 FMODE_READ))
4186 return false;
4187 rpc_restart_call_prepare(task);
4188 return true;
4189}
4190
d45f60c6 4191static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4192{
4193
4194 dprintk("--> %s\n", __func__);
4195
d45f60c6 4196 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4197 return -EAGAIN;
d45f60c6 4198 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4199 return -EAGAIN;
d45f60c6
WAA		 4200 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4201 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4202}
4203
d45f60c6
WAA		 4204static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4205 struct rpc_message *msg)
1da177e4 4206{
d45f60c6
WAA		 4207 hdr->timestamp = jiffies;
4208 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4209 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4210 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4211}
4212
d45f60c6
WAA		 4213static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4214 struct nfs_pgio_header *hdr)
ea7c3303 4215{
d45f60c6
WAA		 4216 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4217 &hdr->args.seq_args,
4218 &hdr->res.seq_res,
9b206149 4219 task))
ef1820f9 4220 return 0;
d45f60c6
WAA		 4221 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4222 hdr->args.lock_context,
4223 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4224 return -EIO;
d45f60c6 4225 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4226 return -EIO;
4227 return 0;
1da177e4
LT		 4228}
4229
d45f60c6
WAA		 4230static int nfs4_write_done_cb(struct rpc_task *task,
4231 struct nfs_pgio_header *hdr)
1da177e4 4232{
d45f60c6 4233 struct inode *inode = hdr->inode;
8478eaa1 4234
d45f60c6
WAA		 4235 trace_nfs4_write(hdr, task->tk_status);
4236 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4237 hdr->args.context->state,
4238 NULL) == -EAGAIN) {
d00c5d43 4239 rpc_restart_call_prepare(task);
788e7a89 4240 return -EAGAIN;
1da177e4 4241 }
4f9838c7 4242 if (task->tk_status >= 0) {
d45f60c6 4243 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4244 nfs_writeback_update_inode(hdr);
4f9838c7 4245 }
788e7a89 4246 return 0;
1da177e4
LT		 4247}
4248
5521abfd 4249static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4250 struct nfs_pgio_args *args)
5521abfd
TM		 4251{
4252
4253 if (!nfs4_error_stateid_expired(task->tk_status) ||
4254 nfs4_stateid_is_current(&args->stateid,
4255 args->context,
4256 args->lock_context,
4257 FMODE_WRITE))
4258 return false;
4259 rpc_restart_call_prepare(task);
4260 return true;
4261}
4262
d45f60c6 4263static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4264{
d45f60c6 4265 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4266 return -EAGAIN;
d45f60c6 4267 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4268 return -EAGAIN;
d45f60c6
WAA		 4269 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4270 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4271}
4272
5a37f851 4273static
d45f60c6 4274bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4275{
5a37f851 4276 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4277 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4278 return false;
4279 /* Otherwise, request attributes if and only if we don't hold
4280 * a delegation
4281 */
011e2a7f 4282 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4283}
a69aef14 4284
d45f60c6
WAA		 4285static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4286 struct rpc_message *msg)
1da177e4 4287{
d45f60c6 4288 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4289
d45f60c6
WAA		 4290 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4291 hdr->args.bitmask = NULL;
4292 hdr->res.fattr = NULL;
7ffd1064 4293 } else
d45f60c6 4294 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4295
d45f60c6
WAA		 4296 if (!hdr->pgio_done_cb)
4297 hdr->pgio_done_cb = nfs4_write_done_cb;
4298 hdr->res.server = server;
4299 hdr->timestamp = jiffies;
1da177e4 4300
bdc7f021 4301 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4302 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4303}
4304
0b7c0153 4305static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4306{
d9afbd1b
TM		 4307 nfs4_setup_sequence(NFS_SERVER(data->inode),
4308 &data->args.seq_args,
4309 &data->res.seq_res,
4310 task);
1da177e4
LT		 4311}
4312
0b7c0153 4313static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4314{
1da177e4 4315 struct inode *inode = data->inode;
14516c3a 4316
cc668ab3 4317 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4318 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4319 NULL, NULL) == -EAGAIN) {
d00c5d43 4320 rpc_restart_call_prepare(task);
788e7a89 4321 return -EAGAIN;
1da177e4 4322 }
788e7a89 4323 return 0;
1da177e4
LT		 4324}
4325
0b7c0153 4326static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4327{
4328 if (!nfs4_sequence_done(task, &data->res.seq_res))
4329 return -EAGAIN;
0b7c0153 4330 return data->commit_done_cb(task, data);
5f452431
FI		 4331}
4332
0b7c0153 4333static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4334{
788e7a89 4335 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4336
0b7c0153
FI		 4337 if (data->commit_done_cb == NULL)
4338 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4339 data->res.server = server;
bdc7f021 4340 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4341 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4342}
4343
9bc4e3ca
CL		 4344struct nfs4_renewdata {
4345 struct nfs_client *client;
4346 unsigned long timestamp;
4347};
4348
1da177e4
LT		 4349/*
4350 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4351 * standalone procedure for queueing an asynchronous RENEW.
4352 */
9bc4e3ca 4353static void nfs4_renew_release(void *calldata)
dc96aef9 4354{
9bc4e3ca
CL		 4355 struct nfs4_renewdata *data = calldata;
4356 struct nfs_client *clp = data->client;
dc96aef9 4357
0851de06
AB		 4358 if (atomic_read(&clp->cl_count) > 1)
4359 nfs4_schedule_state_renewal(clp);
4360 nfs_put_client(clp);
9bc4e3ca 4361 kfree(data);
dc96aef9
AB		 4362}
4363
9bc4e3ca 4364static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4365{
9bc4e3ca
CL		 4366 struct nfs4_renewdata *data = calldata;
4367 struct nfs_client *clp = data->client;
4368 unsigned long timestamp = data->timestamp;
1da177e4 4369
c6d01c6f 4370 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4371 switch (task->tk_status) {
4372 case 0:
4373 break;
4374 case -NFS4ERR_LEASE_MOVED:
4375 nfs4_schedule_lease_moved_recovery(clp);
4376 break;
4377 default:
95baa25c 4378 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4379 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4380 return;
4381 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4382 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4383 return;
4384 }
4385 nfs4_schedule_path_down_recovery(clp);
1da177e4 4386 }
452e9352 4387 do_renew_lease(clp, timestamp);
1da177e4
LT		 4388}
4389
963d8fe5
TM		 4390static const struct rpc_call_ops nfs4_renew_ops = {
4391 .rpc_call_done = nfs4_renew_done,
dc96aef9 4392 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4393};
4394
2f60ea6b 4395static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4396{
4397 struct rpc_message msg = {
4398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4399 .rpc_argp = clp,
b4454fe1 4400 .rpc_cred = cred,
1da177e4 4401 };
9bc4e3ca 4402 struct nfs4_renewdata *data;
1da177e4 4403
2f60ea6b
TM		 4404 if (renew_flags == 0)
4405 return 0;
0851de06
AB		 4406 if (!atomic_inc_not_zero(&clp->cl_count))
4407 return -EIO;
b569ad34 4408 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4409 if (data == NULL)
4410 return -ENOMEM;
4411 data->client = clp;
4412 data->timestamp = jiffies;
bc7a05ca 4413 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4414 &nfs4_renew_ops, data);
1da177e4
LT		 4415}
4416
8534d4ec 4417static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4418{
4419 struct rpc_message msg = {
4420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4421 .rpc_argp = clp,
b4454fe1 4422 .rpc_cred = cred,
1da177e4
LT		 4423 };
4424 unsigned long now = jiffies;
4425 int status;
4426
bc7a05ca 4427 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4428 if (status < 0)
4429 return status;
452e9352 4430 do_renew_lease(clp, now);
1da177e4
LT		 4431 return 0;
4432}
4433
aa1870af
BF		 4434static inline int nfs4_server_supports_acls(struct nfs_server *server)
4435{
7dd7d959 4436 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4437}
4438
21f498c2
TM		 4439/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4440 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4441 * the stack.
4442 */
21f498c2 4443#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4444
e9e3d724
NH		 4445static int buf_to_pages_noslab(const void *buf, size_t buflen,
4446 struct page **pages, unsigned int *pgbase)
4447{
4448 struct page *newpage, **spages;
4449 int rc = 0;
4450 size_t len;
4451 spages = pages;
4452
4453 do {
21f498c2 4454 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4455 newpage = alloc_page(GFP_KERNEL);
4456
4457 if (newpage == NULL)
4458 goto unwind;
4459 memcpy(page_address(newpage), buf, len);
4460 buf += len;
4461 buflen -= len;
4462 *pages++ = newpage;
4463 rc++;
4464 } while (buflen != 0);
4465
4466 return rc;
4467
4468unwind:
4469 for(; rc > 0; rc--)
4470 __free_page(spages[rc-1]);
4471 return -ENOMEM;
4472}
4473
e50a1c2e
BF		 4474struct nfs4_cached_acl {
4475 int cached;
4476 size_t len;
3e9d4154 4477 char data[0];
e50a1c2e
BF		 4478};
4479
4480static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4481{
4482 struct nfs_inode *nfsi = NFS_I(inode);
4483
4484 spin_lock(&inode->i_lock);
4485 kfree(nfsi->nfs4_acl);
4486 nfsi->nfs4_acl = acl;
4487 spin_unlock(&inode->i_lock);
4488}
4489
4490static void nfs4_zap_acl_attr(struct inode *inode)
4491{
4492 nfs4_set_cached_acl(inode, NULL);
4493}
4494
4495static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4496{
4497 struct nfs_inode *nfsi = NFS_I(inode);
4498 struct nfs4_cached_acl *acl;
4499 int ret = -ENOENT;
4500
4501 spin_lock(&inode->i_lock);
4502 acl = nfsi->nfs4_acl;
4503 if (acl == NULL)
4504 goto out;
4505 if (buf == NULL) /* user is just asking for length */
4506 goto out_len;
4507 if (acl->cached == 0)
4508 goto out;
4509 ret = -ERANGE; /* see getxattr(2) man page */
4510 if (acl->len > buflen)
4511 goto out;
4512 memcpy(buf, acl->data, acl->len);
4513out_len:
4514 ret = acl->len;
4515out:
4516 spin_unlock(&inode->i_lock);
4517 return ret;
4518}
4519
5794d21e 4520static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4521{
4522 struct nfs4_cached_acl *acl;
b291f1b1 4523 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4524
1f1ea6c2 4525 if (buflen <= PAGE_SIZE) {
b291f1b1 4526 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4527 if (acl == NULL)
4528 goto out;
4529 acl->cached = 1;
5794d21e 4530 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4531 } else {
4532 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4533 if (acl == NULL)
4534 goto out;
4535 acl->cached = 0;
4536 }
4537 acl->len = acl_len;
4538out:
4539 nfs4_set_cached_acl(inode, acl);
4540}
4541
bf118a34
AA		 4542/*
4543 * The getxattr API returns the required buffer length when called with a
4544 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4545 * the required buf. On a NULL buf, we send a page of data to the server
4546 * guessing that the ACL request can be serviced by a page. If so, we cache
4547 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4548 * the cache. If not so, we throw away the page, and cache the required
4549 * length. The next getxattr call will then produce another round trip to
4550 * the server, this time with the input buf of the required size.
4551 */
16b4289c 4552static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4553{
bf118a34 4554 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4555 struct nfs_getaclargs args = {
4556 .fh = NFS_FH(inode),
4557 .acl_pages = pages,
4558 .acl_len = buflen,
4559 };
663c79b3
BH		 4560 struct nfs_getaclres res = {
4561 .acl_len = buflen,
4562 };
aa1870af
BF		 4563 struct rpc_message msg = {
4564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4565 .rpc_argp = &args,
663c79b3 4566 .rpc_resp = &res,
aa1870af 4567 };
21f498c2
TM		 4568 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4569 int ret = -ENOMEM, i;
aa1870af 4570
bf118a34
AA		 4571 /* As long as we're doing a round trip to the server anyway,
4572 * let's be prepared for a page of acl data. */
4573 if (npages == 0)
4574 npages = 1;
21f498c2
TM		 4575 if (npages > ARRAY_SIZE(pages))
4576 return -ERANGE;
5a006899 4577
bf118a34
AA		 4578 for (i = 0; i < npages; i++) {
4579 pages[i] = alloc_page(GFP_KERNEL);
4580 if (!pages[i])
4581 goto out_free;
e50a1c2e 4582 }
5a006899
SP		 4583
4584 /* for decoding across pages */
4585 res.acl_scratch = alloc_page(GFP_KERNEL);
4586 if (!res.acl_scratch)
4587 goto out_free;
4588
bf118a34
AA		 4589 args.acl_len = npages * PAGE_SIZE;
4590 args.acl_pgbase = 0;
5a006899 4591
de040bec 4592 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4593 __func__, buf, buflen, npages, args.acl_len);
4594 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4595 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4596 if (ret)
4597 goto out_free;
bf118a34 4598
1f1ea6c2
TM		 4599 /* Handle the case where the passed-in buffer is too short */
4600 if (res.acl_flags & NFS4_ACL_TRUNC) {
4601 /* Did the user only issue a request for the acl length? */
4602 if (buf == NULL)
4603 goto out_ok;
e50a1c2e 4604 ret = -ERANGE;
1f1ea6c2 4605 goto out_free;
e50a1c2e 4606 }
1f1ea6c2 4607 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4608 if (buf) {
4609 if (res.acl_len > buflen) {
4610 ret = -ERANGE;
4611 goto out_free;
4612 }
1f1ea6c2 4613 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4614 }
1f1ea6c2
TM		 4615out_ok:
4616 ret = res.acl_len;
e50a1c2e 4617out_free:
bf118a34
AA		 4618 for (i = 0; i < npages; i++)
4619 if (pages[i])
4620 __free_page(pages[i]);
331818f1
TM		 4621 if (res.acl_scratch)
4622 __free_page(res.acl_scratch);
aa1870af
BF		 4623 return ret;
4624}
4625
16b4289c
TM		 4626static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4627{
4628 struct nfs4_exception exception = { };
4629 ssize_t ret;
4630 do {
4631 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4632 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4633 if (ret >= 0)
4634 break;
4635 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4636 } while (exception.retry);
4637 return ret;
4638}
4639
e50a1c2e
BF		 4640static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4641{
4642 struct nfs_server *server = NFS_SERVER(inode);
4643 int ret;
4644
4645 if (!nfs4_server_supports_acls(server))
4646 return -EOPNOTSUPP;
4647 ret = nfs_revalidate_inode(server, inode);
4648 if (ret < 0)
4649 return ret;
08a22b39
AK		 4650 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4651 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4652 ret = nfs4_read_cached_acl(inode, buf, buflen);
4653 if (ret != -ENOENT)
bf118a34
AA		 4654 /* -ENOENT is returned if there is no ACL or if there is an ACL
4655 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4656 return ret;
4657 return nfs4_get_acl_uncached(inode, buf, buflen);
4658}
4659
16b4289c 4660static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4661{
4662 struct nfs_server *server = NFS_SERVER(inode);
4663 struct page *pages[NFS4ACL_MAXPAGES];
4664 struct nfs_setaclargs arg = {
4665 .fh = NFS_FH(inode),
4666 .acl_pages = pages,
4667 .acl_len = buflen,
4668 };
73c403a9 4669 struct nfs_setaclres res;
4b580ee3
BF		 4670 struct rpc_message msg = {
4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4672 .rpc_argp = &arg,
73c403a9 4673 .rpc_resp = &res,
4b580ee3 4674 };
21f498c2 4675 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4676 int ret, i;
4b580ee3
BF		 4677
4678 if (!nfs4_server_supports_acls(server))
4679 return -EOPNOTSUPP;
21f498c2
TM		 4680 if (npages > ARRAY_SIZE(pages))
4681 return -ERANGE;
e9e3d724
NH		 4682 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4683 if (i < 0)
4684 return i;
57ec14c5 4685 nfs4_inode_return_delegation(inode);
7c513058 4686 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4687
4688 /*
4689 * Free each page after tx, so the only ref left is
4690 * held by the network stack
4691 */
4692 for (; i > 0; i--)
4693 put_page(pages[i-1]);
4694
08a22b39
AK		 4695 /*
4696 * Acl update can result in inode attribute update.
4697 * so mark the attribute cache invalid.
4698 */
4699 spin_lock(&inode->i_lock);
4700 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4701 spin_unlock(&inode->i_lock);
f41f7418
TM		 4702 nfs_access_zap_cache(inode);
4703 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4704 return ret;
4705}
4706
16b4289c
TM		 4707static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4708{
4709 struct nfs4_exception exception = { };
4710 int err;
4711 do {
c1578b76
TM		 4712 err = __nfs4_proc_set_acl(inode, buf, buflen);
4713 trace_nfs4_set_acl(inode, err);
4714 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4715 &exception);
4716 } while (exception.retry);
4717 return err;
4718}
4719
aa9c2669
DQ		 4720#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4721static int _nfs4_get_security_label(struct inode *inode, void *buf,
4722 size_t buflen)
4723{
4724 struct nfs_server *server = NFS_SERVER(inode);
4725 struct nfs_fattr fattr;
4726 struct nfs4_label label = {0, 0, buflen, buf};
4727
4728 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4729 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4730 .fh = NFS_FH(inode),
4731 .bitmask = bitmask,
4732 };
4733 struct nfs4_getattr_res res = {
4734 .fattr = &fattr,
4735 .label = &label,
4736 .server = server,
4737 };
4738 struct rpc_message msg = {
4739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4740 .rpc_argp = &arg,
aa9c2669
DQ		 4741 .rpc_resp = &res,
4742 };
4743 int ret;
4744
4745 nfs_fattr_init(&fattr);
4746
fcb63a9b 4747 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4748 if (ret)
4749 return ret;
4750 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4751 return -ENOENT;
4752 if (buflen < label.len)
4753 return -ERANGE;
4754 return 0;
4755}
4756
4757static int nfs4_get_security_label(struct inode *inode, void *buf,
4758 size_t buflen)
4759{
4760 struct nfs4_exception exception = { };
4761 int err;
4762
4763 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4764 return -EOPNOTSUPP;
4765
4766 do {
c1578b76
TM		 4767 err = _nfs4_get_security_label(inode, buf, buflen);
4768 trace_nfs4_get_security_label(inode, err);
4769 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4770 &exception);
4771 } while (exception.retry);
4772 return err;
4773}
4774
4775static int _nfs4_do_set_security_label(struct inode *inode,
4776 struct nfs4_label *ilabel,
4777 struct nfs_fattr *fattr,
4778 struct nfs4_label *olabel)
4779{
4780
4781 struct iattr sattr = {0};
4782 struct nfs_server *server = NFS_SERVER(inode);
4783 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4784 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4785 .fh = NFS_FH(inode),
4786 .iap = &sattr,
4787 .server = server,
4788 .bitmask = bitmask,
4789 .label = ilabel,
4790 };
4791 struct nfs_setattrres res = {
4792 .fattr = fattr,
4793 .label = olabel,
4794 .server = server,
4795 };
4796 struct rpc_message msg = {
4797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4798 .rpc_argp = &arg,
aa9c2669
DQ		 4799 .rpc_resp = &res,
4800 };
4801 int status;
4802
12207f69 4803 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4804
12207f69 4805 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4806 if (status)
4807 dprintk("%s failed: %d\n", __func__, status);
4808
4809 return status;
4810}
4811
4812static int nfs4_do_set_security_label(struct inode *inode,
4813 struct nfs4_label *ilabel,
4814 struct nfs_fattr *fattr,
4815 struct nfs4_label *olabel)
4816{
4817 struct nfs4_exception exception = { };
4818 int err;
4819
4820 do {
c1578b76
TM		 4821 err = _nfs4_do_set_security_label(inode, ilabel,
4822 fattr, olabel);
4823 trace_nfs4_set_security_label(inode, err);
4824 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4825 &exception);
4826 } while (exception.retry);
4827 return err;
4828}
4829
4830static int
4831nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4832{
4833 struct nfs4_label ilabel, *olabel = NULL;
4834 struct nfs_fattr fattr;
4835 struct rpc_cred *cred;
2b0143b5 4836 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4837 int status;
4838
4839 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4840 return -EOPNOTSUPP;
4841
4842 nfs_fattr_init(&fattr);
4843
4844 ilabel.pi = 0;
4845 ilabel.lfs = 0;
4846 ilabel.label = (char *)buf;
4847 ilabel.len = buflen;
4848
4849 cred = rpc_lookup_cred();
4850 if (IS_ERR(cred))
4851 return PTR_ERR(cred);
4852
4853 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4854 if (IS_ERR(olabel)) {
4855 status = -PTR_ERR(olabel);
4856 goto out;
4857 }
4858
4859 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4860 if (status == 0)
4861 nfs_setsecurity(inode, &fattr, olabel);
4862
4863 nfs4_label_free(olabel);
4864out:
4865 put_rpccred(cred);
4866 return status;
4867}
4868#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4869
4870
1da177e4 4871static int
8478eaa1
N		 4872nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4873 struct nfs4_state *state, long *timeout)
1da177e4 4874{
aa5190d0
TM		 4875 struct nfs_client *clp = server->nfs_client;
4876
4877 if (task->tk_status >= 0)
1da177e4
LT		 4878 return 0;
4879 switch(task->tk_status) {
a1d0b5ee 4880 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4881 case -NFS4ERR_ADMIN_REVOKED:
4882 case -NFS4ERR_BAD_STATEID:
4883 case -NFS4ERR_OPENMODE:
4884 if (state == NULL)
4885 break;
5d422301 4886 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4887 goto recovery_failed;
0400a6b0 4888 goto wait_on_recovery;
0ced63d1 4889 case -NFS4ERR_EXPIRED:
5d422301
TM		 4890 if (state != NULL) {
4891 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4892 goto recovery_failed;
5d422301 4893 }
1da177e4 4894 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4895 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4896 nfs4_schedule_lease_recovery(clp);
4897 goto wait_on_recovery;
519ae255
CL		 4898 case -NFS4ERR_MOVED:
4899 if (nfs4_schedule_migration_recovery(server) < 0)
4900 goto recovery_failed;
4901 goto wait_on_recovery;
8ef2f8d4
CL		 4902 case -NFS4ERR_LEASE_MOVED:
4903 nfs4_schedule_lease_moved_recovery(clp);
4904 goto wait_on_recovery;
4745e315
AA		 4905#if defined(CONFIG_NFS_V4_1)
4906 case -NFS4ERR_BADSESSION:
4907 case -NFS4ERR_BADSLOT:
4908 case -NFS4ERR_BAD_HIGH_SLOT:
4909 case -NFS4ERR_DEADSESSION:
4910 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4911 case -NFS4ERR_SEQ_FALSE_RETRY:
4912 case -NFS4ERR_SEQ_MISORDERED:
4913 dprintk("%s ERROR %d, Reset session\n", __func__,
4914 task->tk_status);
9f594791 4915 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4916 goto wait_on_recovery;
4745e315 4917#endif /* CONFIG_NFS_V4_1 */
1da177e4 4918 case -NFS4ERR_DELAY:
aa5190d0 4919 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4920 rpc_delay(task, nfs4_update_delay(timeout));
4921 goto restart_call;
006ea73e 4922 case -NFS4ERR_GRACE:
1da177e4 4923 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4924 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4925 case -NFS4ERR_OLD_STATEID:
f1478c13 4926 goto restart_call;
1da177e4
LT		 4927 }
4928 task->tk_status = nfs4_map_errors(task->tk_status);
4929 return 0;
9f51a78e 4930recovery_failed:
5d422301
TM		 4931 task->tk_status = -EIO;
4932 return 0;
0400a6b0 4933wait_on_recovery:
a2c0b9e2 4934 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4935 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4936 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4937 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4938 goto recovery_failed;
f1478c13 4939restart_call:
a2c0b9e2
TM		 4940 task->tk_status = 0;
4941 return -EAGAIN;
1da177e4
LT		 4942}
4943
f092075d
CL		 4944static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4945 nfs4_verifier *bootverf)
cd93710e
CL		 4946{
4947 __be32 verf[2];
4948
2c820d9a
CL		 4949 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4950 /* An impossible timestamp guarantees this value
4951 * will never match a generated boot time. */
4952 verf[0] = 0;
17f26b12 4953 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4954 } else {
f092075d 4955 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4956 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4957 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4958 }
cd93710e
CL		 4959 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4960}
4961
a3192688
JL		 4962static int
4963nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4964{
a3192688
JL		 4965 int result;
4966 size_t len;
4967 char *str;
4968 bool retried = false;
e984a55a 4969
ceb3a16c 4970 if (clp->cl_owner_id != NULL)
a3192688
JL		 4971 return 0;
4972retry:
4973 rcu_read_lock();
4974 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4975 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4976 1 +
4977 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4978 1;
4979 rcu_read_unlock();
4980
4981 if (len > NFS4_OPAQUE_LIMIT + 1)
4982 return -EINVAL;
4983
4984 /*
4985 * Since this string is allocated at mount time, and held until the
4986 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4987 * about a memory-reclaim deadlock.
4988 */
4989 str = kmalloc(len, GFP_KERNEL);
4990 if (!str)
4991 return -ENOMEM;
ceb3a16c 4992
e984a55a 4993 rcu_read_lock();
a3192688
JL		 4994 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
4995 clp->cl_ipaddr,
4996 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
4997 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 4998 rcu_read_unlock();
a3192688
JL		 4999
5000 /* Did something change? */
5001 if (result >= len) {
5002 kfree(str);
5003 if (retried)
5004 return -EINVAL;
5005 retried = true;
5006 goto retry;
5007 }
5008 clp->cl_owner_id = str;
5009 return 0;
e984a55a
CL		 5010}
5011
873e3851
JL		 5012static int
5013nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5014{
5015 int result;
5016 size_t len;
5017 char *str;
5018
5019 len = 10 + 10 + 1 + 10 + 1 +
5020 strlen(nfs4_client_id_uniquifier) + 1 +
5021 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5022
5023 if (len > NFS4_OPAQUE_LIMIT + 1)
5024 return -EINVAL;
5025
5026 /*
5027 * Since this string is allocated at mount time, and held until the
5028 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5029 * about a memory-reclaim deadlock.
5030 */
5031 str = kmalloc(len, GFP_KERNEL);
5032 if (!str)
5033 return -ENOMEM;
5034
5035 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5036 clp->rpc_ops->version, clp->cl_minorversion,
5037 nfs4_client_id_uniquifier,
5038 clp->cl_rpcclient->cl_nodename);
5039 if (result >= len) {
5040 kfree(str);
5041 return -EINVAL;
5042 }
5043 clp->cl_owner_id = str;
5044 return 0;
5045}
5046
5047static int
5048nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5049{
873e3851
JL		 5050 int result;
5051 size_t len;
5052 char *str;
ceb3a16c
TM		 5053
5054 if (clp->cl_owner_id != NULL)
873e3851 5055 return 0;
6f2ea7f2
CL		 5056
5057 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5058 return nfs4_init_uniquifier_client_string(clp);
5059
5060 len = 10 + 10 + 1 + 10 + 1 +
5061 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5062
5063 if (len > NFS4_OPAQUE_LIMIT + 1)
5064 return -EINVAL;
5065
5066 /*
5067 * Since this string is allocated at mount time, and held until the
5068 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5069 * about a memory-reclaim deadlock.
5070 */
5071 str = kmalloc(len, GFP_KERNEL);
5072 if (!str)
5073 return -ENOMEM;
5074
5075 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5076 clp->rpc_ops->version, clp->cl_minorversion,
5077 clp->cl_rpcclient->cl_nodename);
5078 if (result >= len) {
5079 kfree(str);
5080 return -EINVAL;
5081 }
5082 clp->cl_owner_id = str;
5083 return 0;
e984a55a
CL		 5084}
5085
706cb8db
CL		 5086/*
5087 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5088 * services. Advertise one based on the address family of the
5089 * clientaddr.
5090 */
5091static unsigned int
5092nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5093{
5094 if (strchr(clp->cl_ipaddr, ':') != NULL)
5095 return scnprintf(buf, len, "tcp6");
5096 else
5097 return scnprintf(buf, len, "tcp");
5098}
5099
f11b2a1c
JL		 5100static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5101{
5102 struct nfs4_setclientid *sc = calldata;
5103
5104 if (task->tk_status == 0)
5105 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5106}
5107
5108static const struct rpc_call_ops nfs4_setclientid_ops = {
5109 .rpc_call_done = nfs4_setclientid_done,
5110};
5111
6bbb4ae8
CL		 5112/**
5113 * nfs4_proc_setclientid - Negotiate client ID
5114 * @clp: state data structure
5115 * @program: RPC program for NFSv4 callback service
5116 * @port: IP port number for NFS4 callback service
5117 * @cred: RPC credential to use for this call
5118 * @res: where to place the result
5119 *
5120 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5121 */
bb8b27e5
TM		 5122int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5123 unsigned short port, struct rpc_cred *cred,
5124 struct nfs4_setclientid_res *res)
1da177e4
LT		 5125{
5126 nfs4_verifier sc_verifier;
5127 struct nfs4_setclientid setclientid = {
5128 .sc_verifier = &sc_verifier,
5129 .sc_prog = program,
3a6bb738 5130 .sc_clnt = clp,
1da177e4
LT		 5131 };
5132 struct rpc_message msg = {
5133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5134 .rpc_argp = &setclientid,
bb8b27e5 5135 .rpc_resp = res,
286d7d6a 5136 .rpc_cred = cred,
1da177e4 5137 };
f11b2a1c
JL		 5138 struct rpc_task *task;
5139 struct rpc_task_setup task_setup_data = {
5140 .rpc_client = clp->cl_rpcclient,
5141 .rpc_message = &msg,
5142 .callback_ops = &nfs4_setclientid_ops,
5143 .callback_data = &setclientid,
5144 .flags = RPC_TASK_TIMEOUT,
5145 };
6bbb4ae8 5146 int status;
1da177e4 5147
de734831 5148 /* nfs_client_id4 */
f092075d 5149 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5150
5151 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5152 status = nfs4_init_uniform_client_string(clp);
5153 else
a3192688 5154 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5155
5156 if (status)
5157 goto out;
3a6bb738 5158
de734831 5159 /* cb_client4 */
706cb8db
CL		 5160 setclientid.sc_netid_len =
5161 nfs4_init_callback_netid(clp,
5162 setclientid.sc_netid,
5163 sizeof(setclientid.sc_netid));
de734831 5164 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5165 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5166 clp->cl_ipaddr, port >> 8, port & 255);
5167
3a6bb738 5168 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5169 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5170 clp->cl_owner_id);
f11b2a1c
JL		 5171 task = rpc_run_task(&task_setup_data);
5172 if (IS_ERR(task)) {
5173 status = PTR_ERR(task);
5174 goto out;
5175 }
5176 status = task->tk_status;
5177 if (setclientid.sc_cred) {
5178 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5179 put_rpccred(setclientid.sc_cred);
5180 }
5181 rpc_put_task(task);
5182out:
c6d01c6f 5183 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5184 dprintk("NFS reply setclientid: %d\n", status);
5185 return status;
1da177e4
LT		 5186}
5187
6bbb4ae8
CL		 5188/**
5189 * nfs4_proc_setclientid_confirm - Confirm client ID
5190 * @clp: state data structure
5191 * @res: result of a previous SETCLIENTID
5192 * @cred: RPC credential to use for this call
5193 *
5194 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5195 */
fd954ae1 5196int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5197 struct nfs4_setclientid_res *arg,
5198 struct rpc_cred *cred)
1da177e4 5199{
1da177e4
LT		 5200 struct rpc_message msg = {
5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5202 .rpc_argp = arg,
286d7d6a 5203 .rpc_cred = cred,
1da177e4 5204 };
1da177e4
LT		 5205 int status;
5206
6bbb4ae8
CL		 5207 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5208 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5209 clp->cl_clientid);
1bd714f2 5210 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5211 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5212 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5213 return status;
5214}
5215
fe650407
TM		 5216struct nfs4_delegreturndata {
5217 struct nfs4_delegreturnargs args;
fa178f29 5218 struct nfs4_delegreturnres res;
fe650407
TM		 5219 struct nfs_fh fh;
5220 nfs4_stateid stateid;
26e976a8 5221 unsigned long timestamp;
fa178f29 5222 struct nfs_fattr fattr;
fe650407 5223 int rpc_status;
039b756a
PT		 5224 struct inode *inode;
5225 bool roc;
5226 u32 roc_barrier;
fe650407
TM		 5227};
5228
fe650407
TM		 5229static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5230{
5231 struct nfs4_delegreturndata *data = calldata;
938e1010 5232
14516c3a
TM		 5233 if (!nfs4_sequence_done(task, &data->res.seq_res))
5234 return;
938e1010 5235
ca8acf8d 5236 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5237 switch (task->tk_status) {
79708861 5238 case 0:
fa178f29 5239 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5240 case -NFS4ERR_ADMIN_REVOKED:
5241 case -NFS4ERR_DELEG_REVOKED:
5242 case -NFS4ERR_BAD_STATEID:
5243 case -NFS4ERR_OLD_STATEID:
5244 case -NFS4ERR_STALE_STATEID:
5245 case -NFS4ERR_EXPIRED:
5246 task->tk_status = 0;
039b756a
PT		 5247 if (data->roc)
5248 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5249 break;
79708861 5250 default:
8478eaa1
N		 5251 if (nfs4_async_handle_error(task, data->res.server,
5252 NULL, NULL) == -EAGAIN) {
d00c5d43 5253 rpc_restart_call_prepare(task);
79708861
RL		 5254 return;
5255 }
5256 }
5257 data->rpc_status = task->tk_status;
fe650407
TM		 5258}
5259
5260static void nfs4_delegreturn_release(void *calldata)
5261{
039b756a 5262 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5263 struct inode *inode = data->inode;
039b756a 5264
ea7c38fe
TM		 5265 if (inode) {
5266 if (data->roc)
5267 pnfs_roc_release(inode);
5268 nfs_iput_and_deactive(inode);
5269 }
fe650407
TM		 5270 kfree(calldata);
5271}
5272
938e1010
AA		 5273static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5274{
5275 struct nfs4_delegreturndata *d_data;
5276
5277 d_data = (struct nfs4_delegreturndata *)data;
5278
039b756a
PT		 5279 if (d_data->roc &&
5280 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5281 return;
5282
d9afbd1b
TM		 5283 nfs4_setup_sequence(d_data->res.server,
5284 &d_data->args.seq_args,
5285 &d_data->res.seq_res,
5286 task);
938e1010 5287}
938e1010 5288
c8d149f3 5289static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5290 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5291 .rpc_call_done = nfs4_delegreturn_done,
5292 .rpc_release = nfs4_delegreturn_release,
5293};
5294
e6f81075 5295static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5296{
5297 struct nfs4_delegreturndata *data;
fa178f29 5298 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5299 struct rpc_task *task;
5138fde0
TM		 5300 struct rpc_message msg = {
5301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5302 .rpc_cred = cred,
5303 };
c970aa85
TM		 5304 struct rpc_task_setup task_setup_data = {
5305 .rpc_client = server->client,
5138fde0 5306 .rpc_message = &msg,
c970aa85
TM		 5307 .callback_ops = &nfs4_delegreturn_ops,
5308 .flags = RPC_TASK_ASYNC,
5309 };
e6f81075 5310 int status = 0;
fe650407 5311
8535b2be 5312 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5313 if (data == NULL)
5314 return -ENOMEM;
a9c92d6b 5315 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5316 data->args.fhandle = &data->fh;
5317 data->args.stateid = &data->stateid;
9e907fec 5318 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5319 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5320 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5321 data->res.fattr = &data->fattr;
5322 data->res.server = server;
5138fde0 5323 nfs_fattr_init(data->res.fattr);
26e976a8 5324 data->timestamp = jiffies;
fe650407 5325 data->rpc_status = 0;
ea7c38fe
TM		 5326 data->inode = nfs_igrab_and_active(inode);
5327 if (data->inode)
5328 data->roc = nfs4_roc(inode);
fe650407 5329
c970aa85 5330 task_setup_data.callback_data = data;
1174dd1f
TM		 5331 msg.rpc_argp = &data->args;
5332 msg.rpc_resp = &data->res;
c970aa85 5333 task = rpc_run_task(&task_setup_data);
7a1218a2 5334 if (IS_ERR(task))
fe650407 5335 return PTR_ERR(task);
e6f81075
TM		 5336 if (!issync)
5337 goto out;
fe650407 5338 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5339 if (status != 0)
5340 goto out;
5341 status = data->rpc_status;
e144cbcc
TM		 5342 if (status == 0)
5343 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5344 else
5345 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5346out:
e6b3c4db 5347 rpc_put_task(task);
fe650407 5348 return status;
1da177e4
LT		 5349}
5350
e6f81075 5351int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5352{
5353 struct nfs_server *server = NFS_SERVER(inode);
5354 struct nfs4_exception exception = { };
5355 int err;
5356 do {
e6f81075 5357 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5358 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5359 switch (err) {
5360 case -NFS4ERR_STALE_STATEID:
5361 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5362 case 0:
5363 return 0;
5364 }
5365 err = nfs4_handle_exception(server, err, &exception);
5366 } while (exception.retry);
5367 return err;
5368}
5369
5370#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5371#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5372
5373/*
5374 * sleep, with exponential backoff, and retry the LOCK operation.
5375 */
5376static unsigned long
5377nfs4_set_lock_task_retry(unsigned long timeout)
5378{
416ad3c9 5379 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5380 timeout <<= 1;
5381 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5382 return NFS4_LOCK_MAXTIMEOUT;
5383 return timeout;
5384}
5385
1da177e4
LT		 5386static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5387{
5388 struct inode *inode = state->inode;
5389 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5390 struct nfs_client *clp = server->nfs_client;
911d1aaf 5391 struct nfs_lockt_args arg = {
1da177e4 5392 .fh = NFS_FH(inode),
911d1aaf 5393 .fl = request,
1da177e4 5394 };
911d1aaf
TM		 5395 struct nfs_lockt_res res = {
5396 .denied = request,
1da177e4
LT		 5397 };
5398 struct rpc_message msg = {
5399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5400 .rpc_argp = &arg,
5401 .rpc_resp = &res,
5402 .rpc_cred = state->owner->so_cred,
5403 };
1da177e4
LT		 5404 struct nfs4_lock_state *lsp;
5405 int status;
5406
911d1aaf 5407 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5408 status = nfs4_set_lock_state(state, request);
5409 if (status != 0)
5410 goto out;
5411 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5412 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5413 arg.lock_owner.s_dev = server->s_dev;
7c513058 5414 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5415 switch (status) {
5416 case 0:
5417 request->fl_type = F_UNLCK;
5418 break;
5419 case -NFS4ERR_DENIED:
5420 status = 0;
1da177e4 5421 }
70cc6487 5422 request->fl_ops->fl_release_private(request);
a6f951dd 5423 request->fl_ops = NULL;
8d0a8a9d 5424out:
1da177e4
LT		 5425 return status;
5426}
5427
5428static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5429{
5430 struct nfs4_exception exception = { };
5431 int err;
5432
5433 do {
d1b748a5
TM		 5434 err = _nfs4_proc_getlk(state, cmd, request);
5435 trace_nfs4_get_lock(request, state, cmd, err);
5436 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5437 &exception);
5438 } while (exception.retry);
5439 return err;
5440}
5441
5442static int do_vfs_lock(struct file *file, struct file_lock *fl)
5443{
5444 int res = 0;
5445 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5446 case FL_POSIX:
5447 res = posix_lock_file_wait(file, fl);
5448 break;
5449 case FL_FLOCK:
5450 res = flock_lock_file_wait(file, fl);
5451 break;
5452 default:
5453 BUG();
5454 }
1da177e4
LT		 5455 return res;
5456}
5457
faf5f49c 5458struct nfs4_unlockdata {
911d1aaf
TM		 5459 struct nfs_locku_args arg;
5460 struct nfs_locku_res res;
faf5f49c
TM		 5461 struct nfs4_lock_state *lsp;
5462 struct nfs_open_context *ctx;
911d1aaf
TM		 5463 struct file_lock fl;
5464 const struct nfs_server *server;
26e976a8 5465 unsigned long timestamp;
faf5f49c
TM		 5466};
5467
911d1aaf
TM		 5468static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5469 struct nfs_open_context *ctx,
5470 struct nfs4_lock_state *lsp,
5471 struct nfs_seqid *seqid)
5472{
5473 struct nfs4_unlockdata *p;
5474 struct inode *inode = lsp->ls_state->inode;
5475
8535b2be 5476 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5477 if (p == NULL)
5478 return NULL;
5479 p->arg.fh = NFS_FH(inode);
5480 p->arg.fl = &p->fl;
5481 p->arg.seqid = seqid;
c1d51931 5482 p->res.seqid = seqid;
911d1aaf
TM		 5483 p->lsp = lsp;
5484 atomic_inc(&lsp->ls_count);
5485 /* Ensure we don't close file until we're done freeing locks! */
5486 p->ctx = get_nfs_open_context(ctx);
db2efec0 5487 get_file(fl->fl_file);
911d1aaf
TM		 5488 memcpy(&p->fl, fl, sizeof(p->fl));
5489 p->server = NFS_SERVER(inode);
5490 return p;
5491}
5492
06f814a3 5493static void nfs4_locku_release_calldata(void *data)
faf5f49c 5494{
963d8fe5 5495 struct nfs4_unlockdata *calldata = data;
911d1aaf 5496 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5497 nfs4_put_lock_state(calldata->lsp);
5498 put_nfs_open_context(calldata->ctx);
db2efec0 5499 fput(calldata->fl.fl_file);
06f814a3 5500 kfree(calldata);
faf5f49c
TM		 5501}
5502
963d8fe5 5503static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5504{
963d8fe5 5505 struct nfs4_unlockdata *calldata = data;
faf5f49c 5506
14516c3a
TM		 5507 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5508 return;
faf5f49c
TM		 5509 switch (task->tk_status) {
5510 case 0:
26e976a8 5511 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5512 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5513 if (nfs4_update_lock_stateid(calldata->lsp,
5514 &calldata->res.stateid))
5515 break;
9e33bed5
TM		 5516 case -NFS4ERR_BAD_STATEID:
5517 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5518 case -NFS4ERR_STALE_STATEID:
5519 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5520 if (!nfs4_stateid_match(&calldata->arg.stateid,
5521 &calldata->lsp->ls_stateid))
5522 rpc_restart_call_prepare(task);
faf5f49c
TM		 5523 break;
5524 default:
8478eaa1
N		 5525 if (nfs4_async_handle_error(task, calldata->server,
5526 NULL, NULL) == -EAGAIN)
d00c5d43 5527 rpc_restart_call_prepare(task);
faf5f49c 5528 }
2b1bc308 5529 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5530}
5531
4ce70ada 5532static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5533{
4ce70ada 5534 struct nfs4_unlockdata *calldata = data;
faf5f49c 5535
911d1aaf 5536 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5537 goto out_wait;
425c1d4e 5538 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5539 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5540 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5541 goto out_no_action;
faf5f49c 5542 }
26e976a8 5543 calldata->timestamp = jiffies;
035168ab 5544 if (nfs4_setup_sequence(calldata->server,
a893693c 5545 &calldata->arg.seq_args,
2240a9e2
TM		 5546 &calldata->res.seq_res,
5547 task) != 0)
5548 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5549 return;
5550out_no_action:
5551 task->tk_action = NULL;
5552out_wait:
5553 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5554}
5555
963d8fe5 5556static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5557 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5558 .rpc_call_done = nfs4_locku_done,
06f814a3 5559 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5560};
5561
a5d16a4d
TM		 5562static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5563 struct nfs_open_context *ctx,
5564 struct nfs4_lock_state *lsp,
5565 struct nfs_seqid *seqid)
5566{
5567 struct nfs4_unlockdata *data;
5138fde0
TM		 5568 struct rpc_message msg = {
5569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5570 .rpc_cred = ctx->cred,
5571 };
c970aa85
TM		 5572 struct rpc_task_setup task_setup_data = {
5573 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5574 .rpc_message = &msg,
c970aa85 5575 .callback_ops = &nfs4_locku_ops,
101070ca 5576 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5577 .flags = RPC_TASK_ASYNC,
5578 };
a5d16a4d 5579
fa940720
WAA		 5580 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5581 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5582
137d6aca
FF		 5583 /* Ensure this is an unlock - when canceling a lock, the
5584 * canceled lock is passed in, and it won't be an unlock.
5585 */
5586 fl->fl_type = F_UNLCK;
5587
a5d16a4d
TM		 5588 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5589 if (data == NULL) {
5590 nfs_free_seqid(seqid);
5591 return ERR_PTR(-ENOMEM);
5592 }
5593
a9c92d6b 5594 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5595 msg.rpc_argp = &data->arg;
5596 msg.rpc_resp = &data->res;
c970aa85
TM		 5597 task_setup_data.callback_data = data;
5598 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5599}
5600
faf5f49c
TM		 5601static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5602{
65b62a29
TM		 5603 struct inode *inode = state->inode;
5604 struct nfs4_state_owner *sp = state->owner;
5605 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5606 struct nfs_seqid *seqid;
1da177e4 5607 struct nfs4_lock_state *lsp;
06f814a3 5608 struct rpc_task *task;
b4019c0e 5609 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5610 int status = 0;
536ff0f8 5611 unsigned char fl_flags = request->fl_flags;
faf5f49c 5612
8d0a8a9d 5613 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5614 /* Unlock _before_ we do the RPC call */
5615 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5616 /* Exclude nfs_delegation_claim_locks() */
5617 mutex_lock(&sp->so_delegreturn_mutex);
5618 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5619 down_read(&nfsi->rwsem);
5620 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5621 up_read(&nfsi->rwsem);
65b62a29 5622 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5623 goto out;
19e03c57
TM		 5624 }
5625 up_read(&nfsi->rwsem);
65b62a29 5626 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5627 if (status != 0)
9b073574
TM		 5628 goto out;
5629 /* Is this a delegated lock? */
8d0a8a9d 5630 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5631 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5632 goto out;
b4019c0e
TM		 5633 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5634 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5635 status = -ENOMEM;
badc76dd 5636 if (IS_ERR(seqid))
9b073574 5637 goto out;
cd3758e3 5638 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5639 status = PTR_ERR(task);
5640 if (IS_ERR(task))
9b073574 5641 goto out;
a5d16a4d 5642 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5643 rpc_put_task(task);
9b073574 5644out:
536ff0f8 5645 request->fl_flags = fl_flags;
d1b748a5 5646 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5647 return status;
5648}
5649
a5d16a4d
TM		 5650struct nfs4_lockdata {
5651 struct nfs_lock_args arg;
5652 struct nfs_lock_res res;
5653 struct nfs4_lock_state *lsp;
5654 struct nfs_open_context *ctx;
5655 struct file_lock fl;
26e976a8 5656 unsigned long timestamp;
a5d16a4d
TM		 5657 int rpc_status;
5658 int cancelled;
66179efe 5659 struct nfs_server *server;
a5d16a4d
TM		 5660};
5661
5662static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5663 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5664 gfp_t gfp_mask)
1da177e4 5665{
a5d16a4d
TM		 5666 struct nfs4_lockdata *p;
5667 struct inode *inode = lsp->ls_state->inode;
1da177e4 5668 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5669 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5670
8535b2be 5671 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5672 if (p == NULL)
5673 return NULL;
5674
5675 p->arg.fh = NFS_FH(inode);
5676 p->arg.fl = &p->fl;
8535b2be 5677 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5678 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5679 goto out_free;
b4019c0e
TM		 5680 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5681 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5682 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5683 goto out_free_seqid;
7539bbab 5684 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5685 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5686 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5687 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5688 p->lsp = lsp;
66179efe 5689 p->server = server;
a5d16a4d
TM		 5690 atomic_inc(&lsp->ls_count);
5691 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5692 get_file(fl->fl_file);
a5d16a4d
TM		 5693 memcpy(&p->fl, fl, sizeof(p->fl));
5694 return p;
2f74c0a0
TM		 5695out_free_seqid:
5696 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5697out_free:
5698 kfree(p);
5699 return NULL;
5700}
5701
5702static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5703{
5704 struct nfs4_lockdata *data = calldata;
5705 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5706
3110ff80 5707 dprintk("%s: begin!\n", __func__);
2f74c0a0 5708 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5709 goto out_wait;
a5d16a4d 5710 /* Do we need to do an open_to_lock_owner? */
6b447539 5711 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5712 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5713 goto out_release_lock_seqid;
8fe72bac 5714 }
425c1d4e
TM		 5715 nfs4_stateid_copy(&data->arg.open_stateid,
5716 &state->open_stateid);
a5d16a4d 5717 data->arg.new_lock_owner = 1;
c1d51931 5718 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5719 } else {
2f74c0a0 5720 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5721 nfs4_stateid_copy(&data->arg.lock_stateid,
5722 &data->lsp->ls_stateid);
5723 }
5d422301
TM		 5724 if (!nfs4_valid_open_stateid(state)) {
5725 data->rpc_status = -EBADF;
5726 task->tk_action = NULL;
5727 goto out_release_open_seqid;
5728 }
26e976a8 5729 data->timestamp = jiffies;
035168ab
TM		 5730 if (nfs4_setup_sequence(data->server,
5731 &data->arg.seq_args,
2240a9e2 5732 &data->res.seq_res,
d9afbd1b 5733 task) == 0)
66179efe 5734 return;
5d422301 5735out_release_open_seqid:
2240a9e2
TM		 5736 nfs_release_seqid(data->arg.open_seqid);
5737out_release_lock_seqid:
5738 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5739out_wait:
5740 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5741 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5742}
5743
a5d16a4d
TM		 5744static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5745{
5746 struct nfs4_lockdata *data = calldata;
39071e6f 5747 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5748
3110ff80 5749 dprintk("%s: begin!\n", __func__);
a5d16a4d 5750
14516c3a
TM		 5751 if (!nfs4_sequence_done(task, &data->res.seq_res))
5752 return;
66179efe 5753
a5d16a4d 5754 data->rpc_status = task->tk_status;
425c1d4e
TM		 5755 switch (task->tk_status) {
5756 case 0:
2b0143b5 5757 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5758 data->timestamp);
c69899a1
TM		 5759 if (data->arg.new_lock) {
5760 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5761 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5762 rpc_restart_call_prepare(task);
5763 break;
5764 }
5765 }
39071e6f
TM		 5766 if (data->arg.new_lock_owner != 0) {
5767 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5768 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5769 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5770 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5771 rpc_restart_call_prepare(task);
425c1d4e
TM		 5772 break;
5773 case -NFS4ERR_BAD_STATEID:
5774 case -NFS4ERR_OLD_STATEID:
5775 case -NFS4ERR_STALE_STATEID:
5776 case -NFS4ERR_EXPIRED:
5777 if (data->arg.new_lock_owner != 0) {
5778 if (!nfs4_stateid_match(&data->arg.open_stateid,
5779 &lsp->ls_state->open_stateid))
5780 rpc_restart_call_prepare(task);
5781 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5782 &lsp->ls_stateid))
5783 rpc_restart_call_prepare(task);
a5d16a4d 5784 }
3110ff80 5785 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5786}
5787
5788static void nfs4_lock_release(void *calldata)
5789{
5790 struct nfs4_lockdata *data = calldata;
5791
3110ff80 5792 dprintk("%s: begin!\n", __func__);
2f74c0a0 5793 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5794 if (data->cancelled != 0) {
5795 struct rpc_task *task;
5796 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5797 data->arg.lock_seqid);
5798 if (!IS_ERR(task))
bf294b41 5799 rpc_put_task_async(task);
3110ff80 5800 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5801 } else
5802 nfs_free_seqid(data->arg.lock_seqid);
5803 nfs4_put_lock_state(data->lsp);
5804 put_nfs_open_context(data->ctx);
feaff8e5 5805 fput(data->fl.fl_file);
a5d16a4d 5806 kfree(data);
3110ff80 5807 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5808}
5809
5810static const struct rpc_call_ops nfs4_lock_ops = {
5811 .rpc_call_prepare = nfs4_lock_prepare,
5812 .rpc_call_done = nfs4_lock_done,
5813 .rpc_release = nfs4_lock_release,
5814};
5815
2bee72a6
TM		 5816static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5817{
2bee72a6
TM		 5818 switch (error) {
5819 case -NFS4ERR_ADMIN_REVOKED:
5820 case -NFS4ERR_BAD_STATEID:
ecac799a 5821 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5822 if (new_lock_owner != 0 ||
795a88c9 5823 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5824 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5825 break;
5826 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5827 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5828 case -NFS4ERR_EXPIRED:
5829 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5830 };
5831}
5832
afe6c27c 5833static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5834{
5835 struct nfs4_lockdata *data;
5836 struct rpc_task *task;
5138fde0
TM		 5837 struct rpc_message msg = {
5838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5839 .rpc_cred = state->owner->so_cred,
5840 };
c970aa85
TM		 5841 struct rpc_task_setup task_setup_data = {
5842 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5843 .rpc_message = &msg,
c970aa85 5844 .callback_ops = &nfs4_lock_ops,
101070ca 5845 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5846 .flags = RPC_TASK_ASYNC,
5847 };
a5d16a4d
TM		 5848 int ret;
5849
3110ff80 5850 dprintk("%s: begin!\n", __func__);
cd3758e3 5851 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5852 fl->fl_u.nfs4_fl.owner,
5853 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5854 if (data == NULL)
5855 return -ENOMEM;
5856 if (IS_SETLKW(cmd))
5857 data->arg.block = 1;
a9c92d6b 5858 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5859 msg.rpc_argp = &data->arg;
5860 msg.rpc_resp = &data->res;
c970aa85 5861 task_setup_data.callback_data = data;
8fe72bac
TM		 5862 if (recovery_type > NFS_LOCK_NEW) {
5863 if (recovery_type == NFS_LOCK_RECLAIM)
5864 data->arg.reclaim = NFS_LOCK_RECLAIM;
5865 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5866 } else
5867 data->arg.new_lock = 1;
c970aa85 5868 task = rpc_run_task(&task_setup_data);
7a1218a2 5869 if (IS_ERR(task))
a5d16a4d 5870 return PTR_ERR(task);
a5d16a4d
TM		 5871 ret = nfs4_wait_for_completion_rpc_task(task);
5872 if (ret == 0) {
5873 ret = data->rpc_status;
2bee72a6
TM		 5874 if (ret)
5875 nfs4_handle_setlk_error(data->server, data->lsp,
5876 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5877 } else
5878 data->cancelled = 1;
e6b3c4db 5879 rpc_put_task(task);
3110ff80 5880 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5881 return ret;
1da177e4
LT		 5882}
5883
5884static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5885{
202b50dc 5886 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5887 struct nfs4_exception exception = {
5888 .inode = state->inode,
5889 };
202b50dc
TM		 5890 int err;
5891
5892 do {
42a2d13e
TM		 5893 /* Cache the lock if possible... */
5894 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5895 return 0;
afe6c27c 5896 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5897 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5898 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5899 break;
5900 nfs4_handle_exception(server, err, &exception);
5901 } while (exception.retry);
5902 return err;
1da177e4
LT		 5903}
5904
5905static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5906{
202b50dc 5907 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5908 struct nfs4_exception exception = {
5909 .inode = state->inode,
5910 };
202b50dc
TM		 5911 int err;
5912
6bfc93ef
TM		 5913 err = nfs4_set_lock_state(state, request);
5914 if (err != 0)
5915 return err;
f6de7a39 5916 if (!recover_lost_locks) {
ef1820f9
N		 5917 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5918 return 0;
5919 }
202b50dc 5920 do {
42a2d13e
TM		 5921 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5922 return 0;
afe6c27c 5923 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5924 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5925 switch (err) {
5926 default:
5927 goto out;
5928 case -NFS4ERR_GRACE:
5929 case -NFS4ERR_DELAY:
5930 nfs4_handle_exception(server, err, &exception);
5931 err = 0;
5932 }
202b50dc 5933 } while (exception.retry);
a9ed2e25 5934out:
202b50dc 5935 return err;
1da177e4
LT		 5936}
5937
f062eb6c 5938#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5939/**
5940 * nfs41_check_expired_locks - possibly free a lock stateid
5941 *
5942 * @state: NFSv4 state for an inode
5943 *
5944 * Returns NFS_OK if recovery for this stateid is now finished.
5945 * Otherwise a negative NFS4ERR value is returned.
5946 */
b01dd1d8 5947static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5948{
eb64cf96 5949 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5950 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5951 struct nfs_server *server = NFS_SERVER(state->inode);
5952
b01dd1d8 5953 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5954 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5955 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5956
5957 status = nfs41_test_stateid(server,
5958 &lsp->ls_stateid,
5959 cred);
08cb47fa 5960 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5961 if (status != NFS_OK) {
3e60ffdd
CL		 5962 /* Free the stateid unless the server
5963 * informs us the stateid is unrecognized. */
89af2739
CL		 5964 if (status != -NFS4ERR_BAD_STATEID)
5965 nfs41_free_stateid(server,
ab7cb0df
TM		 5966 &lsp->ls_stateid,
5967 cred);
795a88c9 5968 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5969 ret = status;
5970 }
5971 }
5972 };
5973
5974 return ret;
5975}
5976
5977static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5978{
5979 int status = NFS_OK;
5980
5981 if (test_bit(LK_STATE_IN_USE, &state->flags))
5982 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5983 if (status != NFS_OK)
5984 status = nfs4_lock_expired(state, request);
5985 return status;
f062eb6c
BS		 5986}
5987#endif
5988
1da177e4
LT		 5989static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5990{
19e03c57 5991 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5992 unsigned char fl_flags = request->fl_flags;
8e469ebd 5993 int status = -ENOLCK;
1da177e4 5994
8e469ebd
TM		 5995 if ((fl_flags & FL_POSIX) &&
5996 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5997 goto out;
6bfc93ef 5998 /* Is this a delegated open? */
6bfc93ef
TM		 5999 status = nfs4_set_lock_state(state, request);
6000 if (status != 0)
6001 goto out;
01c3b861
TM		 6002 request->fl_flags |= FL_ACCESS;
6003 status = do_vfs_lock(request->fl_file, request);
6004 if (status < 0)
6005 goto out;
19e03c57 6006 down_read(&nfsi->rwsem);
01c3b861 6007 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6008 /* Yes: cache locks! */
01c3b861 6009 /* ...but avoid races with delegation recall... */
19e03c57
TM		 6010 request->fl_flags = fl_flags & ~FL_SLEEP;
6011 status = do_vfs_lock(request->fl_file, request);
c69899a1 6012 up_read(&nfsi->rwsem);
9a99af49 6013 goto out;
9a99af49 6014 }
19e03c57 6015 up_read(&nfsi->rwsem);
c69899a1 6016 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6017out:
6018 request->fl_flags = fl_flags;
1da177e4
LT		 6019 return status;
6020}
6021
6022static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6023{
a1d0b5ee
TM		 6024 struct nfs4_exception exception = {
6025 .state = state,
05ffe24f 6026 .inode = state->inode,
a1d0b5ee 6027 };
1da177e4
LT		 6028 int err;
6029
6030 do {
965b5d67 6031 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6032 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6033 if (err == -NFS4ERR_DENIED)
6034 err = -EAGAIN;
1da177e4 6035 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6036 err, &exception);
1da177e4
LT		 6037 } while (exception.retry);
6038 return err;
6039}
6040
6041static int
6042nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6043{
6044 struct nfs_open_context *ctx;
6045 struct nfs4_state *state;
6046 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6047 int status;
6048
6049 /* verify open state */
cd3758e3 6050 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6051 state = ctx->state;
6052
6053 if (request->fl_start < 0 || request->fl_end < 0)
6054 return -EINVAL;
6055
d953126a
TM		 6056 if (IS_GETLK(cmd)) {
6057 if (state != NULL)
6058 return nfs4_proc_getlk(state, F_GETLK, request);
6059 return 0;
6060 }
1da177e4
LT		 6061
6062 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6063 return -EINVAL;
6064
d953126a
TM		 6065 if (request->fl_type == F_UNLCK) {
6066 if (state != NULL)
6067 return nfs4_proc_unlck(state, cmd, request);
6068 return 0;
6069 }
1da177e4 6070
d953126a
TM		 6071 if (state == NULL)
6072 return -ENOLCK;
55725513
TM		 6073 /*
6074 * Don't rely on the VFS having checked the file open mode,
6075 * since it won't do this for flock() locks.
6076 */
f44106e2 6077 switch (request->fl_type) {
55725513
TM		 6078 case F_RDLCK:
6079 if (!(filp->f_mode & FMODE_READ))
6080 return -EBADF;
6081 break;
6082 case F_WRLCK:
6083 if (!(filp->f_mode & FMODE_WRITE))
6084 return -EBADF;
6085 }
6086
1da177e4
LT		 6087 do {
6088 status = nfs4_proc_setlk(state, cmd, request);
6089 if ((status != -EAGAIN) || IS_SETLK(cmd))
6090 break;
6091 timeout = nfs4_set_lock_task_retry(timeout);
6092 status = -ERESTARTSYS;
6093 if (signalled())
6094 break;
6095 } while(status < 0);
1da177e4
LT		 6096 return status;
6097}
6098
db4f2e63 6099int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6100{
6101 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6102 int err;
6103
6104 err = nfs4_set_lock_state(state, fl);
6105 if (err != 0)
db4f2e63 6106 return err;
4a706fa0 6107 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6108 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6109}
6b3b5496 6110
cf470c3e
TM		 6111struct nfs_release_lockowner_data {
6112 struct nfs4_lock_state *lsp;
5ae67c4f 6113 struct nfs_server *server;
cf470c3e 6114 struct nfs_release_lockowner_args args;
b7e63a10 6115 struct nfs_release_lockowner_res res;
60ea6812 6116 unsigned long timestamp;
cf470c3e
TM		 6117};
6118
fbd4bfd1
CL		 6119static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6120{
6121 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6122 struct nfs_server *server = data->server;
cb04ad2a
PT		 6123 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6124 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6125 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6126 data->timestamp = jiffies;
fbd4bfd1
CL		 6127}
6128
6129static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6130{
6131 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6132 struct nfs_server *server = data->server;
6133
b7e63a10 6134 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6135
6136 switch (task->tk_status) {
6137 case 0:
6138 renew_lease(server, data->timestamp);
6139 break;
6140 case -NFS4ERR_STALE_CLIENTID:
6141 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6142 nfs4_schedule_lease_recovery(server->nfs_client);
6143 break;
60ea6812
CL		 6144 case -NFS4ERR_LEASE_MOVED:
6145 case -NFS4ERR_DELAY:
8478eaa1
N		 6146 if (nfs4_async_handle_error(task, server,
6147 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6148 rpc_restart_call_prepare(task);
6149 }
fbd4bfd1
CL		 6150}
6151
d3c7b7cc
TM		 6152static void nfs4_release_lockowner_release(void *calldata)
6153{
cf470c3e 6154 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6155 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6156 kfree(calldata);
6157}
6158
17280175 6159static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6160 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6161 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6162 .rpc_release = nfs4_release_lockowner_release,
6163};
6164
f1cdae87
JL		 6165static void
6166nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6167{
cf470c3e 6168 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6169 struct rpc_message msg = {
6170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6171 };
6172
6173 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6174 return;
fbd4bfd1 6175
cf470c3e
TM		 6176 data = kmalloc(sizeof(*data), GFP_NOFS);
6177 if (!data)
f1cdae87 6178 return;
cf470c3e 6179 data->lsp = lsp;
5ae67c4f 6180 data->server = server;
cf470c3e
TM		 6181 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6182 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6183 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6184
cf470c3e 6185 msg.rpc_argp = &data->args;
b7e63a10
TM		 6186 msg.rpc_resp = &data->res;
6187 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6188 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6189}
6190
aa1870af
BF		 6191#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6192
64c2ce8b
AK		 6193static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6194 const void *buf, size_t buflen,
6195 int flags, int type)
6b3b5496 6196{
64c2ce8b
AK		 6197 if (strcmp(key, "") != 0)
6198 return -EINVAL;
4b580ee3 6199
2b0143b5 6200 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6201}
6202
64c2ce8b
AK		 6203static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6204 void *buf, size_t buflen, int type)
6b3b5496 6205{
64c2ce8b
AK		 6206 if (strcmp(key, "") != 0)
6207 return -EINVAL;
aa1870af 6208
2b0143b5 6209 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6210}
6211
64c2ce8b
AK		 6212static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6213 size_t list_len, const char *name,
6214 size_t name_len, int type)
6b3b5496 6215{
64c2ce8b 6216 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6217
2b0143b5 6218 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6219 return 0;
64c2ce8b
AK		 6220
6221 if (list && len <= list_len)
6222 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6223 return len;
6b3b5496
BF		 6224}
6225
c9bccef6
DQ		 6226#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6227static inline int nfs4_server_supports_labels(struct nfs_server *server)
6228{
6229 return server->caps & NFS_CAP_SECURITY_LABEL;
6230}
6231
6232static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6233 const void *buf, size_t buflen,
6234 int flags, int type)
6235{
6236 if (security_ismaclabel(key))
6237 return nfs4_set_security_label(dentry, buf, buflen);
6238
6239 return -EOPNOTSUPP;
6240}
6241
6242static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6243 void *buf, size_t buflen, int type)
6244{
6245 if (security_ismaclabel(key))
2b0143b5 6246 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6247 return -EOPNOTSUPP;
6248}
6249
6250static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6251 size_t list_len, const char *name,
6252 size_t name_len, int type)
6253{
6254 size_t len = 0;
6255
2b0143b5
DH		 6256 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6257 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6258 if (list && len <= list_len)
2b0143b5 6259 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6260 }
6261 return len;
6262}
6263
6264static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6265 .prefix = XATTR_SECURITY_PREFIX,
6266 .list = nfs4_xattr_list_nfs4_label,
6267 .get = nfs4_xattr_get_nfs4_label,
6268 .set = nfs4_xattr_set_nfs4_label,
6269};
6270#endif
6271
6272
533eb461
AA		 6273/*
6274 * nfs_fhget will use either the mounted_on_fileid or the fileid
6275 */
69aaaae1
TM		 6276static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6277{
533eb461
AA		 6278 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6279 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6280 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6281 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6282 return;
6283
6284 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6285 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6286 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6287 fattr->nlink = 2;
6288}
6289
f05d147f
BS		 6290static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6291 const struct qstr *name,
6292 struct nfs4_fs_locations *fs_locations,
6293 struct page *page)
683b57b4
TM		 6294{
6295 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6296 u32 bitmask[3] = {
361e624f 6297 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6298 };
6299 struct nfs4_fs_locations_arg args = {
6300 .dir_fh = NFS_FH(dir),
c228fd3a 6301 .name = name,
683b57b4
TM		 6302 .page = page,
6303 .bitmask = bitmask,
6304 };
22958463
BH		 6305 struct nfs4_fs_locations_res res = {
6306 .fs_locations = fs_locations,
6307 };
683b57b4
TM		 6308 struct rpc_message msg = {
6309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6310 .rpc_argp = &args,
22958463 6311 .rpc_resp = &res,
683b57b4
TM		 6312 };
6313 int status;
6314
3110ff80 6315 dprintk("%s: start\n", __func__);
533eb461
AA		 6316
6317 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6318 * is not supported */
6319 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6320 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6321 else
6322 bitmask[0] |= FATTR4_WORD0_FILEID;
6323
c228fd3a 6324 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6325 fs_locations->server = server;
830b8e33 6326 fs_locations->nlocations = 0;
f05d147f 6327 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6328 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6329 return status;
6330}
6331
f05d147f
BS		 6332int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6333 const struct qstr *name,
6334 struct nfs4_fs_locations *fs_locations,
6335 struct page *page)
db0a9593
BS		 6336{
6337 struct nfs4_exception exception = { };
6338 int err;
6339 do {
078ea3df
TM		 6340 err = _nfs4_proc_fs_locations(client, dir, name,
6341 fs_locations, page);
6342 trace_nfs4_get_fs_locations(dir, name, err);
6343 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6344 &exception);
6345 } while (exception.retry);
6346 return err;
6347}
6348
b03d735b
CL		 6349/*
6350 * This operation also signals the server that this client is
6351 * performing migration recovery. The server can stop returning
6352 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6353 * appended to this compound to identify the client ID which is
6354 * performing recovery.
6355 */
6356static int _nfs40_proc_get_locations(struct inode *inode,
6357 struct nfs4_fs_locations *locations,
6358 struct page *page, struct rpc_cred *cred)
6359{
6360 struct nfs_server *server = NFS_SERVER(inode);
6361 struct rpc_clnt *clnt = server->client;
6362 u32 bitmask[2] = {
6363 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6364 };
6365 struct nfs4_fs_locations_arg args = {
6366 .clientid = server->nfs_client->cl_clientid,
6367 .fh = NFS_FH(inode),
6368 .page = page,
6369 .bitmask = bitmask,
6370 .migration = 1, /* skip LOOKUP */
6371 .renew = 1, /* append RENEW */
6372 };
6373 struct nfs4_fs_locations_res res = {
6374 .fs_locations = locations,
6375 .migration = 1,
6376 .renew = 1,
6377 };
6378 struct rpc_message msg = {
6379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6380 .rpc_argp = &args,
6381 .rpc_resp = &res,
6382 .rpc_cred = cred,
6383 };
6384 unsigned long now = jiffies;
6385 int status;
6386
6387 nfs_fattr_init(&locations->fattr);
6388 locations->server = server;
6389 locations->nlocations = 0;
6390
6391 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6392 nfs4_set_sequence_privileged(&args.seq_args);
6393 status = nfs4_call_sync_sequence(clnt, server, &msg,
6394 &args.seq_args, &res.seq_res);
6395 if (status)
6396 return status;
6397
6398 renew_lease(server, now);
6399 return 0;
6400}
6401
6402#ifdef CONFIG_NFS_V4_1
6403
6404/*
6405 * This operation also signals the server that this client is
6406 * performing migration recovery. The server can stop asserting
6407 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6408 * performing this operation is identified in the SEQUENCE
6409 * operation in this compound.
6410 *
6411 * When the client supports GETATTR(fs_locations_info), it can
6412 * be plumbed in here.
6413 */
6414static int _nfs41_proc_get_locations(struct inode *inode,
6415 struct nfs4_fs_locations *locations,
6416 struct page *page, struct rpc_cred *cred)
6417{
6418 struct nfs_server *server = NFS_SERVER(inode);
6419 struct rpc_clnt *clnt = server->client;
6420 u32 bitmask[2] = {
6421 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6422 };
6423 struct nfs4_fs_locations_arg args = {
6424 .fh = NFS_FH(inode),
6425 .page = page,
6426 .bitmask = bitmask,
6427 .migration = 1, /* skip LOOKUP */
6428 };
6429 struct nfs4_fs_locations_res res = {
6430 .fs_locations = locations,
6431 .migration = 1,
6432 };
6433 struct rpc_message msg = {
6434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6435 .rpc_argp = &args,
6436 .rpc_resp = &res,
6437 .rpc_cred = cred,
6438 };
6439 int status;
6440
6441 nfs_fattr_init(&locations->fattr);
6442 locations->server = server;
6443 locations->nlocations = 0;
6444
6445 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6446 nfs4_set_sequence_privileged(&args.seq_args);
6447 status = nfs4_call_sync_sequence(clnt, server, &msg,
6448 &args.seq_args, &res.seq_res);
6449 if (status == NFS4_OK &&
6450 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6451 status = -NFS4ERR_LEASE_MOVED;
6452 return status;
6453}
6454
6455#endif /* CONFIG_NFS_V4_1 */
6456
6457/**
6458 * nfs4_proc_get_locations - discover locations for a migrated FSID
6459 * @inode: inode on FSID that is migrating
6460 * @locations: result of query
6461 * @page: buffer
6462 * @cred: credential to use for this operation
6463 *
6464 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6465 * operation failed, or a negative errno if a local error occurred.
6466 *
6467 * On success, "locations" is filled in, but if the server has
6468 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6469 * asserted.
6470 *
6471 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6472 * from this client that require migration recovery.
6473 */
6474int nfs4_proc_get_locations(struct inode *inode,
6475 struct nfs4_fs_locations *locations,
6476 struct page *page, struct rpc_cred *cred)
6477{
6478 struct nfs_server *server = NFS_SERVER(inode);
6479 struct nfs_client *clp = server->nfs_client;
6480 const struct nfs4_mig_recovery_ops *ops =
6481 clp->cl_mvops->mig_recovery_ops;
6482 struct nfs4_exception exception = { };
6483 int status;
6484
6485 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6486 (unsigned long long)server->fsid.major,
6487 (unsigned long long)server->fsid.minor,
6488 clp->cl_hostname);
6489 nfs_display_fhandle(NFS_FH(inode), __func__);
6490
6491 do {
6492 status = ops->get_locations(inode, locations, page, cred);
6493 if (status != -NFS4ERR_DELAY)
6494 break;
6495 nfs4_handle_exception(server, status, &exception);
6496 } while (exception.retry);
6497 return status;
6498}
6499
44c99933
CL		 6500/*
6501 * This operation also signals the server that this client is
6502 * performing "lease moved" recovery. The server can stop
6503 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6504 * is appended to this compound to identify the client ID which is
6505 * performing recovery.
6506 */
6507static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6508{
6509 struct nfs_server *server = NFS_SERVER(inode);
6510 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6511 struct rpc_clnt *clnt = server->client;
6512 struct nfs4_fsid_present_arg args = {
6513 .fh = NFS_FH(inode),
6514 .clientid = clp->cl_clientid,
6515 .renew = 1, /* append RENEW */
6516 };
6517 struct nfs4_fsid_present_res res = {
6518 .renew = 1,
6519 };
6520 struct rpc_message msg = {
6521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6522 .rpc_argp = &args,
6523 .rpc_resp = &res,
6524 .rpc_cred = cred,
6525 };
6526 unsigned long now = jiffies;
6527 int status;
6528
6529 res.fh = nfs_alloc_fhandle();
6530 if (res.fh == NULL)
6531 return -ENOMEM;
6532
6533 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6534 nfs4_set_sequence_privileged(&args.seq_args);
6535 status = nfs4_call_sync_sequence(clnt, server, &msg,
6536 &args.seq_args, &res.seq_res);
6537 nfs_free_fhandle(res.fh);
6538 if (status)
6539 return status;
6540
6541 do_renew_lease(clp, now);
6542 return 0;
6543}
6544
6545#ifdef CONFIG_NFS_V4_1
6546
6547/*
6548 * This operation also signals the server that this client is
6549 * performing "lease moved" recovery. The server can stop asserting
6550 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6551 * this operation is identified in the SEQUENCE operation in this
6552 * compound.
6553 */
6554static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6555{
6556 struct nfs_server *server = NFS_SERVER(inode);
6557 struct rpc_clnt *clnt = server->client;
6558 struct nfs4_fsid_present_arg args = {
6559 .fh = NFS_FH(inode),
6560 };
6561 struct nfs4_fsid_present_res res = {
6562 };
6563 struct rpc_message msg = {
6564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6565 .rpc_argp = &args,
6566 .rpc_resp = &res,
6567 .rpc_cred = cred,
6568 };
6569 int status;
6570
6571 res.fh = nfs_alloc_fhandle();
6572 if (res.fh == NULL)
6573 return -ENOMEM;
6574
6575 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6576 nfs4_set_sequence_privileged(&args.seq_args);
6577 status = nfs4_call_sync_sequence(clnt, server, &msg,
6578 &args.seq_args, &res.seq_res);
6579 nfs_free_fhandle(res.fh);
6580 if (status == NFS4_OK &&
6581 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6582 status = -NFS4ERR_LEASE_MOVED;
6583 return status;
6584}
6585
6586#endif /* CONFIG_NFS_V4_1 */
6587
6588/**
6589 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6590 * @inode: inode on FSID to check
6591 * @cred: credential to use for this operation
6592 *
6593 * Server indicates whether the FSID is present, moved, or not
6594 * recognized. This operation is necessary to clear a LEASE_MOVED
6595 * condition for this client ID.
6596 *
6597 * Returns NFS4_OK if the FSID is present on this server,
6598 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6599 * NFS4ERR code if some error occurred on the server, or a
6600 * negative errno if a local failure occurred.
6601 */
6602int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6603{
6604 struct nfs_server *server = NFS_SERVER(inode);
6605 struct nfs_client *clp = server->nfs_client;
6606 const struct nfs4_mig_recovery_ops *ops =
6607 clp->cl_mvops->mig_recovery_ops;
6608 struct nfs4_exception exception = { };
6609 int status;
6610
6611 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6612 (unsigned long long)server->fsid.major,
6613 (unsigned long long)server->fsid.minor,
6614 clp->cl_hostname);
6615 nfs_display_fhandle(NFS_FH(inode), __func__);
6616
6617 do {
6618 status = ops->fsid_present(inode, cred);
6619 if (status != -NFS4ERR_DELAY)
6620 break;
6621 nfs4_handle_exception(server, status, &exception);
6622 } while (exception.retry);
6623 return status;
6624}
6625
5ec16a85 6626/**
a5250def
WAA		 6627 * If 'use_integrity' is true and the state managment nfs_client
6628 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6629 * and the machine credential as per RFC3530bis and RFC5661 Security
6630 * Considerations sections. Otherwise, just use the user cred with the
6631 * filesystem's rpc_client.
5ec16a85 6632 */
a5250def 6633static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6634{
6635 int status;
6636 struct nfs4_secinfo_arg args = {
6637 .dir_fh = NFS_FH(dir),
6638 .name = name,
6639 };
6640 struct nfs4_secinfo_res res = {
6641 .flavors = flavors,
6642 };
6643 struct rpc_message msg = {
6644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6645 .rpc_argp = &args,
6646 .rpc_resp = &res,
6647 };
a5250def 6648 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6649 struct rpc_cred *cred = NULL;
a5250def
WAA		 6650
6651 if (use_integrity) {
6652 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6653 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6654 msg.rpc_cred = cred;
a5250def 6655 }
5a5ea0d4
BS		 6656
6657 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6658
6659 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6660 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6661
a5250def
WAA		 6662 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6663 &res.seq_res, 0);
5a5ea0d4 6664 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6665
7cb852df
WAA		 6666 if (cred)
6667 put_rpccred(cred);
a5250def 6668
5a5ea0d4
BS		 6669 return status;
6670}
6671
72de53ec
BS		 6672int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6673 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6674{
6675 struct nfs4_exception exception = { };
6676 int err;
6677 do {
a5250def
WAA		 6678 err = -NFS4ERR_WRONGSEC;
6679
6680 /* try to use integrity protection with machine cred */
6681 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6682 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6683
6684 /*
6685 * if unable to use integrity protection, or SECINFO with
6686 * integrity protection returns NFS4ERR_WRONGSEC (which is
6687 * disallowed by spec, but exists in deployed servers) use
6688 * the current filesystem's rpc_client and the user cred.
6689 */
6690 if (err == -NFS4ERR_WRONGSEC)
6691 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6692
078ea3df
TM		 6693 trace_nfs4_secinfo(dir, name, err);
6694 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6695 &exception);
6696 } while (exception.retry);
6697 return err;
6698}
6699
557134a3 6700#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6701/*
6702 * Check the exchange flags returned by the server for invalid flags, having
6703 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6704 * DS flags set.
6705 */
6706static int nfs4_check_cl_exchange_flags(u32 flags)
6707{
6708 if (flags & ~EXCHGID4_FLAG_MASK_R)
6709 goto out_inval;
6710 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6711 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6712 goto out_inval;
6713 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6714 goto out_inval;
6715 return NFS_OK;
6716out_inval:
6717 return -NFS4ERR_INVAL;
6718}
6719
78fe0f41 6720static bool
79d4e1f0
CL		 6721nfs41_same_server_scope(struct nfs41_server_scope *a,
6722 struct nfs41_server_scope *b)
78fe0f41
WAA		 6723{
6724 if (a->server_scope_sz == b->server_scope_sz &&
6725 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6726 return true;
6727
6728 return false;
6729}
6730
7c44f1ae
WAA		 6731/*
6732 * nfs4_proc_bind_conn_to_session()
6733 *
6734 * The 4.1 client currently uses the same TCP connection for the
6735 * fore and backchannel.
6736 */
2cf047c9 6737int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6738{
6739 int status;
71a097c6
TM		 6740 struct nfs41_bind_conn_to_session_args args = {
6741 .client = clp,
6742 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6743 };
7c44f1ae
WAA		 6744 struct nfs41_bind_conn_to_session_res res;
6745 struct rpc_message msg = {
6746 .rpc_proc =
6747 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6748 .rpc_argp = &args,
7c44f1ae 6749 .rpc_resp = &res,
2cf047c9 6750 .rpc_cred = cred,
7c44f1ae
WAA		 6751 };
6752
6753 dprintk("--> %s\n", __func__);
7c44f1ae 6754
71a097c6
TM		 6755 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6756 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6757 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6758
6759 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6760 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6761 if (status == 0) {
71a097c6 6762 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6763 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6764 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6765 status = -EIO;
71a097c6 6766 goto out;
7c44f1ae 6767 }
71a097c6 6768 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6769 dprintk("NFS: %s: Unexpected direction from server\n",
6770 __func__);
6771 status = -EIO;
71a097c6 6772 goto out;
7c44f1ae 6773 }
71a097c6 6774 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6775 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6776 __func__);
6777 status = -EIO;
71a097c6 6778 goto out;
7c44f1ae
WAA		 6779 }
6780 }
7c44f1ae
WAA		 6781out:
6782 dprintk("<-- %s status= %d\n", __func__, status);
6783 return status;
6784}
6785
99fe60d0 6786/*
fa940720
WAA		 6787 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6788 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6789 */
6790static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6791 .how = SP4_MACH_CRED,
6792 .enforce.u.words = {
6793 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6794 1 << (OP_EXCHANGE_ID - 32) |
6795 1 << (OP_CREATE_SESSION - 32) |
6796 1 << (OP_DESTROY_SESSION - 32) |
6797 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6798 },
6799 .allow.u.words = {
6800 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6801 1 << (OP_LOCKU) |
6802 1 << (OP_COMMIT),
8b5bee2e 6803 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6804 1 << (OP_SECINFO_NO_NAME - 32) |
6805 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6806 1 << (OP_FREE_STATEID - 32) |
6807 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6808 }
6809};
6810
6811/*
6812 * Select the state protection mode for client `clp' given the server results
6813 * from exchange_id in `sp'.
99fe60d0 6814 *
2031cd1a
WAA		 6815 * Returns 0 on success, negative errno otherwise.
6816 */
6817static int nfs4_sp4_select_mode(struct nfs_client *clp,
6818 struct nfs41_state_protection *sp)
6819{
6820 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6821 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6822 1 << (OP_EXCHANGE_ID - 32) |
6823 1 << (OP_CREATE_SESSION - 32) |
6824 1 << (OP_DESTROY_SESSION - 32) |
6825 1 << (OP_DESTROY_CLIENTID - 32)
6826 };
6827 unsigned int i;
6828
6829 if (sp->how == SP4_MACH_CRED) {
6830 /* Print state protect result */
6831 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6832 for (i = 0; i <= LAST_NFS4_OP; i++) {
6833 if (test_bit(i, sp->enforce.u.longs))
6834 dfprintk(MOUNT, " enforce op %d\n", i);
6835 if (test_bit(i, sp->allow.u.longs))
6836 dfprintk(MOUNT, " allow op %d\n", i);
6837 }
6838
6839 /* make sure nothing is on enforce list that isn't supported */
6840 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6841 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6842 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6843 return -EINVAL;
6844 }
6845 }
6846
6847 /*
6848 * Minimal mode - state operations are allowed to use machine
6849 * credential. Note this already happens by default, so the
6850 * client doesn't have to do anything more than the negotiation.
6851 *
6852 * NOTE: we don't care if EXCHANGE_ID is in the list -
6853 * we're already using the machine cred for exchange_id
6854 * and will never use a different cred.
6855 */
6856 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6857 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6858 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6859 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6860 dfprintk(MOUNT, "sp4_mach_cred:\n");
6861 dfprintk(MOUNT, " minimal mode enabled\n");
6862 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6863 } else {
6864 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6865 return -EINVAL;
6866 }
fa940720
WAA		 6867
6868 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6869 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6870 dfprintk(MOUNT, " cleanup mode enabled\n");
6871 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6872 }
8b5bee2e
WAA		 6873
6874 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6875 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6876 dfprintk(MOUNT, " secinfo mode enabled\n");
6877 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6878 }
3787d506
WAA		 6879
6880 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6881 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6882 dfprintk(MOUNT, " stateid mode enabled\n");
6883 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6884 }
8c21c62c
WAA		 6885
6886 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6887 dfprintk(MOUNT, " write mode enabled\n");
6888 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6889 }
6890
6891 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6892 dfprintk(MOUNT, " commit mode enabled\n");
6893 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6894 }
2031cd1a
WAA		 6895 }
6896
6897 return 0;
6898}
6899
6900/*
6901 * _nfs4_proc_exchange_id()
6bbb4ae8 6902 *
2031cd1a 6903 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6904 */
2031cd1a
WAA		 6905static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6906 u32 sp4_how)
99fe60d0
BH		 6907{
6908 nfs4_verifier verifier;
6909 struct nfs41_exchange_id_args args = {
cd93710e 6910 .verifier = &verifier,
99fe60d0 6911 .client = clp,
cd3fadec 6912#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6913 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6914 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6915 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6916#else
6917 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6918 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6919#endif
99fe60d0
BH		 6920 };
6921 struct nfs41_exchange_id_res res = {
32b01310 6922 0
99fe60d0
BH		 6923 };
6924 int status;
6925 struct rpc_message msg = {
6926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6927 .rpc_argp = &args,
6928 .rpc_resp = &res,
6929 .rpc_cred = cred,
6930 };
99fe60d0 6931
f092075d 6932 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6933
6934 status = nfs4_init_uniform_client_string(clp);
6935 if (status)
3a6bb738 6936 goto out;
3a6bb738
JL		 6937
6938 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6939 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6940 clp->cl_owner_id);
99fe60d0 6941
acdeb69d 6942 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6943 GFP_NOFS);
acdeb69d 6944 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6945 status = -ENOMEM;
6946 goto out;
6947 }
78fe0f41 6948
79d4e1f0 6949 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6950 GFP_NOFS);
177313f1 6951 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6952 status = -ENOMEM;
acdeb69d 6953 goto out_server_owner;
abe9a6d5 6954 }
78fe0f41 6955
bbafffd2 6956 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6957 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6958 status = -ENOMEM;
6959 goto out_server_scope;
6960 }
6961
2031cd1a
WAA		 6962 switch (sp4_how) {
6963 case SP4_NONE:
6964 args.state_protect.how = SP4_NONE;
6965 break;
6966
6967 case SP4_MACH_CRED:
6968 args.state_protect = nfs4_sp4_mach_cred_request;
6969 break;
6970
6971 default:
6972 /* unsupported! */
6973 WARN_ON_ONCE(1);
6974 status = -EINVAL;
6975 goto out_server_scope;
6976 }
6977
1bd714f2 6978 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6979 trace_nfs4_exchange_id(clp, status);
177313f1 6980 if (status == 0)
32b01310 6981 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6982
2031cd1a
WAA		 6983 if (status == 0)
6984 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6985
acdeb69d 6986 if (status == 0) {
32b01310 6987 clp->cl_clientid = res.clientid;
e11259f9
TM		 6988 clp->cl_exchange_flags = res.flags;
6989 /* Client ID is not confirmed */
6990 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6991 clear_bit(NFS4_SESSION_ESTABLISHED,
6992 &clp->cl_session->session_state);
32b01310 6993 clp->cl_seqid = res.seqid;
e11259f9 6994 }
32b01310 6995
acdeb69d
CL		 6996 kfree(clp->cl_serverowner);
6997 clp->cl_serverowner = res.server_owner;
6998 res.server_owner = NULL;
78fe0f41 6999
7d2ed9ac 7000 /* use the most recent implementation id */
59155546
CL		 7001 kfree(clp->cl_implid);
7002 clp->cl_implid = res.impl_id;
7d2ed9ac 7003
177313f1 7004 if (clp->cl_serverscope != NULL &&
79d4e1f0 7005 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7006 res.server_scope)) {
7007 dprintk("%s: server_scope mismatch detected\n",
7008 __func__);
7009 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7010 kfree(clp->cl_serverscope);
7011 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7012 }
7013
177313f1 7014 if (clp->cl_serverscope == NULL) {
79d4e1f0 7015 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 7016 goto out;
7017 }
32b01310
TM		 7018 } else
7019 kfree(res.impl_id);
7d2ed9ac 7020
acdeb69d
CL		 7021out_server_owner:
7022 kfree(res.server_owner);
7d2ed9ac 7023out_server_scope:
abe9a6d5
WAA		 7024 kfree(res.server_scope);
7025out:
177313f1 7026 if (clp->cl_implid != NULL)
6bbb4ae8 7027 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7028 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7029 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7030 clp->cl_implid->date.seconds,
7031 clp->cl_implid->date.nseconds);
6bbb4ae8 7032 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7033 return status;
7034}
7035
2031cd1a
WAA		 7036/*
7037 * nfs4_proc_exchange_id()
7038 *
7039 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7040 *
7041 * Since the clientid has expired, all compounds using sessions
7042 * associated with the stale clientid will be returning
7043 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7044 * be in some phase of session reset.
7045 *
7046 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7047 */
7048int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7049{
7050 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7051 int status;
7052
7053 /* try SP4_MACH_CRED if krb5i/p */
7054 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7055 authflavor == RPC_AUTH_GSS_KRB5P) {
7056 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7057 if (!status)
7058 return 0;
7059 }
7060
7061 /* try SP4_NONE */
7062 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7063}
7064
66245539
TM		 7065static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7066 struct rpc_cred *cred)
7067{
7068 struct rpc_message msg = {
7069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7070 .rpc_argp = clp,
7071 .rpc_cred = cred,
7072 };
7073 int status;
7074
7075 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7076 trace_nfs4_destroy_clientid(clp, status);
66245539 7077 if (status)
02c67525 7078 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7079 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7080 return status;
7081}
7082
7083static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7084 struct rpc_cred *cred)
7085{
7086 unsigned int loop;
7087 int ret;
7088
7089 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7090 ret = _nfs4_proc_destroy_clientid(clp, cred);
7091 switch (ret) {
7092 case -NFS4ERR_DELAY:
7093 case -NFS4ERR_CLIENTID_BUSY:
7094 ssleep(1);
7095 break;
7096 default:
7097 return ret;
7098 }
7099 }
7100 return 0;
7101}
7102
7103int nfs4_destroy_clientid(struct nfs_client *clp)
7104{
7105 struct rpc_cred *cred;
7106 int ret = 0;
7107
7108 if (clp->cl_mvops->minor_version < 1)
7109 goto out;
7110 if (clp->cl_exchange_flags == 0)
7111 goto out;
05f4c350
CL		 7112 if (clp->cl_preserve_clid)
7113 goto out;
73d8bde5 7114 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7115 ret = nfs4_proc_destroy_clientid(clp, cred);
7116 if (cred)
7117 put_rpccred(cred);
7118 switch (ret) {
7119 case 0:
7120 case -NFS4ERR_STALE_CLIENTID:
7121 clp->cl_exchange_flags = 0;
7122 }
7123out:
7124 return ret;
7125}
7126
2050f0cc
AA		 7127struct nfs4_get_lease_time_data {
7128 struct nfs4_get_lease_time_args *args;
7129 struct nfs4_get_lease_time_res *res;
7130 struct nfs_client *clp;
7131};
7132
7133static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7134 void *calldata)
7135{
2050f0cc
AA		 7136 struct nfs4_get_lease_time_data *data =
7137 (struct nfs4_get_lease_time_data *)calldata;
7138
7139 dprintk("--> %s\n", __func__);
7140 /* just setup sequence, do not trigger session recovery
7141 since we're invoked within one */
d9afbd1b
TM		 7142 nfs41_setup_sequence(data->clp->cl_session,
7143 &data->args->la_seq_args,
7144 &data->res->lr_seq_res,
7145 task);
2050f0cc
AA		 7146 dprintk("<-- %s\n", __func__);
7147}
7148
7149/*
7150 * Called from nfs4_state_manager thread for session setup, so don't recover
7151 * from sequence operation or clientid errors.
7152 */
7153static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7154{
7155 struct nfs4_get_lease_time_data *data =
7156 (struct nfs4_get_lease_time_data *)calldata;
7157
7158 dprintk("--> %s\n", __func__);
14516c3a
TM		 7159 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7160 return;
2050f0cc
AA		 7161 switch (task->tk_status) {
7162 case -NFS4ERR_DELAY:
7163 case -NFS4ERR_GRACE:
7164 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7165 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7166 task->tk_status = 0;
a8a4ae3a
AA		 7167 /* fall through */
7168 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7169 rpc_restart_call_prepare(task);
2050f0cc
AA		 7170 return;
7171 }
2050f0cc
AA		 7172 dprintk("<-- %s\n", __func__);
7173}
7174
17280175 7175static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7176 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7177 .rpc_call_done = nfs4_get_lease_time_done,
7178};
7179
7180int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7181{
7182 struct rpc_task *task;
7183 struct nfs4_get_lease_time_args args;
7184 struct nfs4_get_lease_time_res res = {
7185 .lr_fsinfo = fsinfo,
7186 };
7187 struct nfs4_get_lease_time_data data = {
7188 .args = &args,
7189 .res = &res,
7190 .clp = clp,
7191 };
7192 struct rpc_message msg = {
7193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7194 .rpc_argp = &args,
7195 .rpc_resp = &res,
7196 };
7197 struct rpc_task_setup task_setup = {
7198 .rpc_client = clp->cl_rpcclient,
7199 .rpc_message = &msg,
7200 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7201 .callback_data = &data,
7202 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7203 };
7204 int status;
7205
a9c92d6b 7206 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7207 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7208 dprintk("--> %s\n", __func__);
7209 task = rpc_run_task(&task_setup);
7210
7211 if (IS_ERR(task))
7212 status = PTR_ERR(task);
7213 else {
7214 status = task->tk_status;
7215 rpc_put_task(task);
7216 }
7217 dprintk("<-- %s return %d\n", __func__, status);
7218
7219 return status;
7220}
7221
fc931582
AA		 7222/*
7223 * Initialize the values to be used by the client in CREATE_SESSION
7224 * If nfs4_init_session set the fore channel request and response sizes,
7225 * use them.
7226 *
7227 * Set the back channel max_resp_sz_cached to zero to force the client to
7228 * always set csa_cachethis to FALSE because the current implementation
7229 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7230 */
7231static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7232{
18aad3d5
AA		 7233 unsigned int max_rqst_sz, max_resp_sz;
7234
7235 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7236 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7237
fc931582 7238 /* Fore channel attributes */
18aad3d5
AA		 7239 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7240 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7241 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7242 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7243
7244 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7245 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7246 __func__,
7247 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7248 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7249
7250 /* Back channel attributes */
fc931582
AA		 7251 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7252 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7253 args->bc_attrs.max_resp_sz_cached = 0;
7254 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7255 args->bc_attrs.max_reqs = 1;
7256
7257 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7258 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7259 __func__,
7260 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7261 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7262 args->bc_attrs.max_reqs);
7263}
7264
79969dd1
TM		 7265static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7266 struct nfs41_create_session_res *res)
8d35301d 7267{
43c2e885 7268 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7269 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7270
43c2e885
BF		 7271 if (rcvd->max_resp_sz > sent->max_resp_sz)
7272 return -EINVAL;
7273 /*
7274 * Our requested max_ops is the minimum we need; we're not
7275 * prepared to break up compounds into smaller pieces than that.
7276 * So, no point even trying to continue if the server won't
7277 * cooperate:
7278 */
7279 if (rcvd->max_ops < sent->max_ops)
7280 return -EINVAL;
7281 if (rcvd->max_reqs == 0)
7282 return -EINVAL;
b4b9a0c1
VG		 7283 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7284 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7285 return 0;
8d35301d
AA		 7286}
7287
79969dd1
TM		 7288static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7289 struct nfs41_create_session_res *res)
43c2e885
BF		 7290{
7291 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7292 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7293
b1c0df5f
TM		 7294 if (!(res->flags & SESSION4_BACK_CHAN))
7295 goto out;
43c2e885
BF		 7296 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7297 return -EINVAL;
7298 if (rcvd->max_resp_sz < sent->max_resp_sz)
7299 return -EINVAL;
7300 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7301 return -EINVAL;
7302 /* These would render the backchannel useless: */
b4b9a0c1 7303 if (rcvd->max_ops != sent->max_ops)
43c2e885 7304 return -EINVAL;
b4b9a0c1 7305 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7306 return -EINVAL;
b1c0df5f 7307out:
43c2e885
BF		 7308 return 0;
7309}
8d35301d 7310
8d35301d 7311static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7312 struct nfs41_create_session_res *res)
8d35301d 7313{
43c2e885 7314 int ret;
8d35301d 7315
79969dd1 7316 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7317 if (ret)
7318 return ret;
79969dd1
TM		 7319 return nfs4_verify_back_channel_attrs(args, res);
7320}
7321
7322static void nfs4_update_session(struct nfs4_session *session,
7323 struct nfs41_create_session_res *res)
7324{
7325 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7326 /* Mark client id and session as being confirmed */
7327 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7328 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7329 session->flags = res->flags;
7330 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7331 if (res->flags & SESSION4_BACK_CHAN)
7332 memcpy(&session->bc_attrs, &res->bc_attrs,
7333 sizeof(session->bc_attrs));
8d35301d
AA		 7334}
7335
848f5bda
TM		 7336static int _nfs4_proc_create_session(struct nfs_client *clp,
7337 struct rpc_cred *cred)
fc931582
AA		 7338{
7339 struct nfs4_session *session = clp->cl_session;
7340 struct nfs41_create_session_args args = {
7341 .client = clp,
79969dd1
TM		 7342 .clientid = clp->cl_clientid,
7343 .seqid = clp->cl_seqid,
fc931582
AA		 7344 .cb_program = NFS4_CALLBACK,
7345 };
79969dd1
TM		 7346 struct nfs41_create_session_res res;
7347
fc931582
AA		 7348 struct rpc_message msg = {
7349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7350 .rpc_argp = &args,
7351 .rpc_resp = &res,
848f5bda 7352 .rpc_cred = cred,
fc931582
AA		 7353 };
7354 int status;
7355
7356 nfs4_init_channel_attrs(&args);
0f91421e 7357 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7358
1bd714f2 7359 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7360 trace_nfs4_create_session(clp, status);
fc931582 7361
43095d39 7362 if (!status) {
8d35301d 7363 /* Verify the session's negotiated channel_attrs values */
79969dd1 7364 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7365 /* Increment the clientid slot sequence id */
79969dd1
TM		 7366 if (clp->cl_seqid == res.seqid)
7367 clp->cl_seqid++;
7368 if (status)
7369 goto out;
7370 nfs4_update_session(session, &res);
fc931582 7371 }
79969dd1 7372out:
fc931582
AA		 7373 return status;
7374}
7375
7376/*
7377 * Issues a CREATE_SESSION operation to the server.
7378 * It is the responsibility of the caller to verify the session is
7379 * expired before calling this routine.
7380 */
848f5bda 7381int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7382{
7383 int status;
7384 unsigned *ptr;
fc931582
AA		 7385 struct nfs4_session *session = clp->cl_session;
7386
7387 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7388
848f5bda 7389 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7390 if (status)
7391 goto out;
7392
aacd5537
AA		 7393 /* Init or reset the session slot tables */
7394 status = nfs4_setup_session_slot_tables(session);
7395 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7396 if (status)
7397 goto out;
7398
7399 ptr = (unsigned *)&session->sess_id.data[0];
7400 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7401 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7402out:
7403 dprintk("<-- %s\n", __func__);
7404 return status;
7405}
7406
0f3e66c6
AA		 7407/*
7408 * Issue the over-the-wire RPC DESTROY_SESSION.
7409 * The caller must serialize access to this routine.
7410 */
848f5bda
TM		 7411int nfs4_proc_destroy_session(struct nfs4_session *session,
7412 struct rpc_cred *cred)
0f3e66c6 7413{
848f5bda
TM		 7414 struct rpc_message msg = {
7415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7416 .rpc_argp = session,
7417 .rpc_cred = cred,
7418 };
0f3e66c6 7419 int status = 0;
0f3e66c6
AA		 7420
7421 dprintk("--> nfs4_proc_destroy_session\n");
7422
7423 /* session is still being setup */
e11259f9
TM		 7424 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7425 return 0;
0f3e66c6 7426
1bd714f2 7427 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7428 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7429
7430 if (status)
08106ac7 7431 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7432 "Session has been destroyed regardless...\n", status);
7433
7434 dprintk("<-- nfs4_proc_destroy_session\n");
7435 return status;
7436}
7437
fc01cea9
AA		 7438/*
7439 * Renew the cl_session lease.
7440 */
d5f8d3fe
TM		 7441struct nfs4_sequence_data {
7442 struct nfs_client *clp;
7443 struct nfs4_sequence_args args;
7444 struct nfs4_sequence_res res;
7445};
7446
dc96aef9
AB		 7447static void nfs41_sequence_release(void *data)
7448{
d5f8d3fe
TM		 7449 struct nfs4_sequence_data *calldata = data;
7450 struct nfs_client *clp = calldata->clp;
dc96aef9 7451
7135840f
AB		 7452 if (atomic_read(&clp->cl_count) > 1)
7453 nfs4_schedule_state_renewal(clp);
7454 nfs_put_client(clp);
d5f8d3fe 7455 kfree(calldata);
dc96aef9
AB		 7456}
7457
aa5190d0
TM		 7458static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7459{
7460 switch(task->tk_status) {
7461 case -NFS4ERR_DELAY:
aa5190d0
TM		 7462 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7463 return -EAGAIN;
7464 default:
0400a6b0 7465 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7466 }
7467 return 0;
7468}
7469
dc96aef9 7470static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7471{
d5f8d3fe
TM		 7472 struct nfs4_sequence_data *calldata = data;
7473 struct nfs_client *clp = calldata->clp;
fc01cea9 7474
14516c3a
TM		 7475 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7476 return;
fc01cea9 7477
c6d01c6f 7478 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7479 if (task->tk_status < 0) {
7480 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7481 if (atomic_read(&clp->cl_count) == 1)
7482 goto out;
fc01cea9 7483
aa5190d0
TM		 7484 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7485 rpc_restart_call_prepare(task);
fc01cea9
AA		 7486 return;
7487 }
7488 }
fc01cea9 7489 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7490out:
fc01cea9
AA		 7491 dprintk("<-- %s\n", __func__);
7492}
7493
7494static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7495{
d5f8d3fe
TM		 7496 struct nfs4_sequence_data *calldata = data;
7497 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7498 struct nfs4_sequence_args *args;
7499 struct nfs4_sequence_res *res;
7500
fc01cea9
AA		 7501 args = task->tk_msg.rpc_argp;
7502 res = task->tk_msg.rpc_resp;
7503
d9afbd1b 7504 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7505}
7506
7507static const struct rpc_call_ops nfs41_sequence_ops = {
7508 .rpc_call_done = nfs41_sequence_call_done,
7509 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7510 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7511};
7512
8fe72bac
TM		 7513static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7514 struct rpc_cred *cred,
7515 bool is_privileged)
fc01cea9 7516{
d5f8d3fe 7517 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7518 struct rpc_message msg = {
7519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7520 .rpc_cred = cred,
7521 };
71ac6da9
TM		 7522 struct rpc_task_setup task_setup_data = {
7523 .rpc_client = clp->cl_rpcclient,
7524 .rpc_message = &msg,
8fe72bac 7525 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7526 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7527 };
fc01cea9 7528
7135840f 7529 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7530 return ERR_PTR(-EIO);
dfb4f309 7531 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7532 if (calldata == NULL) {
7135840f 7533 nfs_put_client(clp);
71ac6da9 7534 return ERR_PTR(-ENOMEM);
fc01cea9 7535 }
a9c92d6b 7536 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7537 if (is_privileged)
7538 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7539 msg.rpc_argp = &calldata->args;
7540 msg.rpc_resp = &calldata->res;
7541 calldata->clp = clp;
71ac6da9 7542 task_setup_data.callback_data = calldata;
fc01cea9 7543
71ac6da9
TM		 7544 return rpc_run_task(&task_setup_data);
7545}
7546
2f60ea6b 7547static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7548{
7549 struct rpc_task *task;
7550 int ret = 0;
7551
2f60ea6b 7552 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7553 return -EAGAIN;
8fe72bac 7554 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7555 if (IS_ERR(task))
7556 ret = PTR_ERR(task);
7557 else
bf294b41 7558 rpc_put_task_async(task);
71ac6da9
TM		 7559 dprintk("<-- %s status=%d\n", __func__, ret);
7560 return ret;
7561}
7562
7563static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7564{
7565 struct rpc_task *task;
7566 int ret;
7567
8fe72bac 7568 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7569 if (IS_ERR(task)) {
7570 ret = PTR_ERR(task);
7571 goto out;
7572 }
7573 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7574 if (!ret) {
7575 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7576
7577 if (task->tk_status == 0)
7578 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7579 ret = task->tk_status;
b4410c2f 7580 }
71ac6da9
TM		 7581 rpc_put_task(task);
7582out:
7583 dprintk("<-- %s status=%d\n", __func__, ret);
7584 return ret;
fc01cea9
AA		 7585}
7586
fce5c838
RL		 7587struct nfs4_reclaim_complete_data {
7588 struct nfs_client *clp;
7589 struct nfs41_reclaim_complete_args arg;
7590 struct nfs41_reclaim_complete_res res;
7591};
7592
7593static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7594{
7595 struct nfs4_reclaim_complete_data *calldata = data;
7596
d9afbd1b
TM		 7597 nfs41_setup_sequence(calldata->clp->cl_session,
7598 &calldata->arg.seq_args,
7599 &calldata->res.seq_res,
7600 task);
fce5c838
RL		 7601}
7602
aa5190d0
TM		 7603static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7604{
7605 switch(task->tk_status) {
7606 case 0:
7607 case -NFS4ERR_COMPLETE_ALREADY:
7608 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7609 break;
7610 case -NFS4ERR_DELAY:
aa5190d0 7611 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7612 /* fall through */
7613 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7614 return -EAGAIN;
7615 default:
0400a6b0 7616 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7617 }
7618 return 0;
7619}
7620
fce5c838
RL		 7621static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7622{
7623 struct nfs4_reclaim_complete_data *calldata = data;
7624 struct nfs_client *clp = calldata->clp;
7625 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7626
7627 dprintk("--> %s\n", __func__);
14516c3a
TM		 7628 if (!nfs41_sequence_done(task, res))
7629 return;
fce5c838 7630
c6d01c6f 7631 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7632 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7633 rpc_restart_call_prepare(task);
7634 return;
7635 }
fce5c838
RL		 7636 dprintk("<-- %s\n", __func__);
7637}
7638
7639static void nfs4_free_reclaim_complete_data(void *data)
7640{
7641 struct nfs4_reclaim_complete_data *calldata = data;
7642
7643 kfree(calldata);
7644}
7645
7646static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7647 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7648 .rpc_call_done = nfs4_reclaim_complete_done,
7649 .rpc_release = nfs4_free_reclaim_complete_data,
7650};
7651
7652/*
7653 * Issue a global reclaim complete.
7654 */
965e9c23
TM		 7655static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7656 struct rpc_cred *cred)
fce5c838
RL		 7657{
7658 struct nfs4_reclaim_complete_data *calldata;
7659 struct rpc_task *task;
7660 struct rpc_message msg = {
7661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7662 .rpc_cred = cred,
fce5c838
RL		 7663 };
7664 struct rpc_task_setup task_setup_data = {
7665 .rpc_client = clp->cl_rpcclient,
7666 .rpc_message = &msg,
7667 .callback_ops = &nfs4_reclaim_complete_call_ops,
7668 .flags = RPC_TASK_ASYNC,
7669 };
7670 int status = -ENOMEM;
7671
7672 dprintk("--> %s\n", __func__);
8535b2be 7673 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7674 if (calldata == NULL)
7675 goto out;
7676 calldata->clp = clp;
7677 calldata->arg.one_fs = 0;
fce5c838 7678
a9c92d6b 7679 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7680 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7681 msg.rpc_argp = &calldata->arg;
7682 msg.rpc_resp = &calldata->res;
7683 task_setup_data.callback_data = calldata;
7684 task = rpc_run_task(&task_setup_data);
acf82b85 7685 if (IS_ERR(task)) {
fce5c838 7686 status = PTR_ERR(task);
acf82b85
DC		 7687 goto out;
7688 }
c34c32ea
AA		 7689 status = nfs4_wait_for_completion_rpc_task(task);
7690 if (status == 0)
7691 status = task->tk_status;
fce5c838 7692 rpc_put_task(task);
acf82b85 7693 return 0;
fce5c838
RL		 7694out:
7695 dprintk("<-- %s status=%d\n", __func__, status);
7696 return status;
7697}
b1f69b75
AA		 7698
7699static void
7700nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7701{
7702 struct nfs4_layoutget *lgp = calldata;
c31663d4 7703 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7704 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7705
7706 dprintk("--> %s\n", __func__);
c31663d4
FI		 7707 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7708 * right now covering the LAYOUTGET we are about to send.
7709 * However, that is not so catastrophic, and there seems
7710 * to be no way to prevent it completely.
7711 */
6ba7db34 7712 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7713 &lgp->res.seq_res, task))
b1f69b75 7714 return;
cf7d63f1
FI		 7715 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7716 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7717 &lgp->args.range,
cf7d63f1
FI		 7718 lgp->args.ctx->state)) {
7719 rpc_exit(task, NFS4_OK);
cf7d63f1 7720 }
b1f69b75
AA		 7721}
7722
7723static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7724{
7725 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7726 struct inode *inode = lgp->args.inode;
7727 struct nfs_server *server = NFS_SERVER(inode);
7728 struct pnfs_layout_hdr *lo;
7729 struct nfs4_state *state = NULL;
ed7e5423 7730 unsigned long timeo, now, giveup;
b1f69b75 7731
ed7e5423 7732 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7733
6ba7db34 7734 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7735 goto out;
b1f69b75
AA		 7736
7737 switch (task->tk_status) {
7738 case 0:
ee314c2a 7739 goto out;
ed7e5423
BH		 7740 /*
7741 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7742 * (or clients) writing to the same RAID stripe
7743 */
b1f69b75 7744 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7745 /*
7746 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7747 * existing layout before getting a new one).
7748 */
b1f69b75 7749 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7750 timeo = rpc_get_timeout(task->tk_client);
7751 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7752 now = jiffies;
7753 if (time_after(giveup, now)) {
7754 unsigned long delay;
7755
7756 /* Delay for:
7757 * - Not less then NFS4_POLL_RETRY_MIN.
7758 * - One last time a jiffie before we give up
7759 * - exponential backoff (time_now minus start_attempt)
7760 */
7761 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7762 min((giveup - now - 1),
7763 now - lgp->args.timestamp));
7764
7765 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7766 __func__, delay);
7767 rpc_delay(task, delay);
7768 task->tk_status = 0;
7769 rpc_restart_call_prepare(task);
7770 goto out; /* Do not call nfs4_async_handle_error() */
7771 }
ee314c2a
TM		 7772 break;
7773 case -NFS4ERR_EXPIRED:
7774 case -NFS4ERR_BAD_STATEID:
7775 spin_lock(&inode->i_lock);
7776 lo = NFS_I(inode)->layout;
7777 if (!lo || list_empty(&lo->plh_segs)) {
7778 spin_unlock(&inode->i_lock);
7779 /* If the open stateid was bad, then recover it. */
7780 state = lgp->args.ctx->state;
7781 } else {
7782 LIST_HEAD(head);
7783
defb8460
CH		 7784 /*
7785 * Mark the bad layout state as invalid, then retry
7786 * with the current stateid.
7787 */
ee314c2a
TM		 7788 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7789 spin_unlock(&inode->i_lock);
ee314c2a 7790 pnfs_free_lseg_list(&head);
defb8460
CH		 7791
7792 task->tk_status = 0;
7793 rpc_restart_call_prepare(task);
b1f69b75
AA		 7794 }
7795 }
8478eaa1 7796 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7797 rpc_restart_call_prepare(task);
7798out:
b1f69b75
AA		 7799 dprintk("<-- %s\n", __func__);
7800}
7801
8554116e
IK		 7802static size_t max_response_pages(struct nfs_server *server)
7803{
7804 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7805 return nfs_page_array_len(0, max_resp_sz);
7806}
7807
7808static void nfs4_free_pages(struct page **pages, size_t size)
7809{
7810 int i;
7811
7812 if (!pages)
7813 return;
7814
7815 for (i = 0; i < size; i++) {
7816 if (!pages[i])
7817 break;
7818 __free_page(pages[i]);
7819 }
7820 kfree(pages);
7821}
7822
7823static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7824{
7825 struct page **pages;
7826 int i;
7827
7828 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7829 if (!pages) {
7830 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7831 return NULL;
7832 }
7833
7834 for (i = 0; i < size; i++) {
7835 pages[i] = alloc_page(gfp_flags);
7836 if (!pages[i]) {
7837 dprintk("%s: failed to allocate page\n", __func__);
7838 nfs4_free_pages(pages, size);
7839 return NULL;
7840 }
7841 }
7842
7843 return pages;
7844}
7845
b1f69b75
AA		 7846static void nfs4_layoutget_release(void *calldata)
7847{
7848 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7849 struct inode *inode = lgp->args.inode;
7850 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7851 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7852
7853 dprintk("--> %s\n", __func__);
8554116e 7854 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7855 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7856 put_nfs_open_context(lgp->args.ctx);
7857 kfree(calldata);
7858 dprintk("<-- %s\n", __func__);
7859}
7860
7861static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7862 .rpc_call_prepare = nfs4_layoutget_prepare,
7863 .rpc_call_done = nfs4_layoutget_done,
7864 .rpc_release = nfs4_layoutget_release,
7865};
7866
a0b0a6e3
TM		 7867struct pnfs_layout_segment *
7868nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7869{
a47970ff
WAA		 7870 struct inode *inode = lgp->args.inode;
7871 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7872 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7873 struct rpc_task *task;
7874 struct rpc_message msg = {
7875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7876 .rpc_argp = &lgp->args,
7877 .rpc_resp = &lgp->res,
6ab59344 7878 .rpc_cred = lgp->cred,
b1f69b75
AA		 7879 };
7880 struct rpc_task_setup task_setup_data = {
7881 .rpc_client = server->client,
7882 .rpc_message = &msg,
7883 .callback_ops = &nfs4_layoutget_call_ops,
7884 .callback_data = lgp,
7885 .flags = RPC_TASK_ASYNC,
7886 };
a0b0a6e3 7887 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7888 int status = 0;
7889
7890 dprintk("--> %s\n", __func__);
7891
4bd5a980
PT		 7892 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7893 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7894
8554116e
IK		 7895 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7896 if (!lgp->args.layout.pages) {
7897 nfs4_layoutget_release(lgp);
a0b0a6e3 7898 return ERR_PTR(-ENOMEM);
8554116e
IK		 7899 }
7900 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7901 lgp->args.timestamp = jiffies;
8554116e 7902
35124a09 7903 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7904 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7905 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7906
b1f69b75
AA		 7907 task = rpc_run_task(&task_setup_data);
7908 if (IS_ERR(task))
a0b0a6e3 7909 return ERR_CAST(task);
b1f69b75 7910 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7911 if (status == 0)
7912 status = task->tk_status;
1037e6ea
TM		 7913 trace_nfs4_layoutget(lgp->args.ctx,
7914 &lgp->args.range,
7915 &lgp->res.range,
7916 status);
085b7a45
WAA		 7917 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7918 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7919 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7920 rpc_put_task(task);
7921 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7922 if (status)
7923 return ERR_PTR(status);
7924 return lseg;
b1f69b75
AA		 7925}
7926
cbe82603
BH		 7927static void
7928nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7929{
7930 struct nfs4_layoutreturn *lrp = calldata;
7931
7932 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7933 nfs41_setup_sequence(lrp->clp->cl_session,
7934 &lrp->args.seq_args,
7935 &lrp->res.seq_res,
7936 task);
cbe82603
BH		 7937}
7938
7939static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7940{
7941 struct nfs4_layoutreturn *lrp = calldata;
7942 struct nfs_server *server;
7943
7944 dprintk("--> %s\n", __func__);
7945
6ba7db34 7946 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7947 return;
7948
7949 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7950 switch (task->tk_status) {
7951 default:
7952 task->tk_status = 0;
7953 case 0:
7954 break;
7955 case -NFS4ERR_DELAY:
8478eaa1 7956 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7957 break;
d00c5d43 7958 rpc_restart_call_prepare(task);
cbe82603
BH		 7959 return;
7960 }
cbe82603
BH		 7961 dprintk("<-- %s\n", __func__);
7962}
7963
7964static void nfs4_layoutreturn_release(void *calldata)
7965{
7966 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7967 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7968
7969 dprintk("--> %s\n", __func__);
849b286f
TM		 7970 spin_lock(&lo->plh_inode->i_lock);
7971 if (lrp->res.lrs_present)
7972 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7973 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7974 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7975 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7976 lo->plh_block_lgets--;
7977 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7978 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7979 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7980 kfree(calldata);
7981 dprintk("<-- %s\n", __func__);
7982}
7983
7984static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7985 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7986 .rpc_call_done = nfs4_layoutreturn_done,
7987 .rpc_release = nfs4_layoutreturn_release,
7988};
7989
6c16605d 7990int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7991{
7992 struct rpc_task *task;
7993 struct rpc_message msg = {
7994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7995 .rpc_argp = &lrp->args,
7996 .rpc_resp = &lrp->res,
9556000d 7997 .rpc_cred = lrp->cred,
cbe82603
BH		 7998 };
7999 struct rpc_task_setup task_setup_data = {
1771c577 8000 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8001 .rpc_message = &msg,
8002 .callback_ops = &nfs4_layoutreturn_call_ops,
8003 .callback_data = lrp,
8004 };
6c16605d 8005 int status = 0;
cbe82603
BH		 8006
8007 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8008 if (!sync) {
8009 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8010 if (!lrp->inode) {
8011 nfs4_layoutreturn_release(lrp);
8012 return -EAGAIN;
8013 }
8014 task_setup_data.flags |= RPC_TASK_ASYNC;
8015 }
a9c92d6b 8016 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8017 task = rpc_run_task(&task_setup_data);
8018 if (IS_ERR(task))
8019 return PTR_ERR(task);
5a0ec8ac
TM		 8020 if (sync)
8021 status = task->tk_status;
1037e6ea 8022 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8023 dprintk("<-- %s status=%d\n", __func__, status);
8024 rpc_put_task(task);
8025 return status;
8026}
8027
b1f69b75 8028static int
cd5875fe
TM		 8029_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8030 struct pnfs_device *pdev,
8031 struct rpc_cred *cred)
b1f69b75
AA		 8032{
8033 struct nfs4_getdeviceinfo_args args = {
8034 .pdev = pdev,
4e590803
TM		 8035 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8036 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8037 };
8038 struct nfs4_getdeviceinfo_res res = {
8039 .pdev = pdev,
8040 };
8041 struct rpc_message msg = {
8042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8043 .rpc_argp = &args,
8044 .rpc_resp = &res,
cd5875fe 8045 .rpc_cred = cred,
b1f69b75
AA		 8046 };
8047 int status;
8048
8049 dprintk("--> %s\n", __func__);
7c513058 8050 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8051 if (res.notification & ~args.notify_types)
8052 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8053 if (res.notification != args.notify_types)
8054 pdev->nocache = 1;
4e590803 8055
b1f69b75
AA		 8056 dprintk("<-- %s status=%d\n", __func__, status);
8057
8058 return status;
8059}
8060
cd5875fe
TM		 8061int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8062 struct pnfs_device *pdev,
8063 struct rpc_cred *cred)
b1f69b75
AA		 8064{
8065 struct nfs4_exception exception = { };
8066 int err;
8067
8068 do {
8069 err = nfs4_handle_exception(server,
cd5875fe 8070 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8071 &exception);
8072 } while (exception.retry);
8073 return err;
8074}
8075EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8076
863a3c6c
AA		 8077static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8078{
8079 struct nfs4_layoutcommit_data *data = calldata;
8080 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8081 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8082
d9afbd1b
TM		 8083 nfs41_setup_sequence(session,
8084 &data->args.seq_args,
8085 &data->res.seq_res,
8086 task);
863a3c6c
AA		 8087}
8088
8089static void
8090nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8091{
8092 struct nfs4_layoutcommit_data *data = calldata;
8093 struct nfs_server *server = NFS_SERVER(data->args.inode);
8094
6ba7db34 8095 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8096 return;
8097
8098 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8099 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8100 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8101 case -NFS4ERR_BADLAYOUT: /* no layout */
8102 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8103 task->tk_status = 0;
e59d27e0 8104 case 0:
e59d27e0
TM		 8105 break;
8106 default:
8478eaa1 8107 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8108 rpc_restart_call_prepare(task);
8109 return;
8110 }
8111 }
863a3c6c
AA		 8112}
8113
8114static void nfs4_layoutcommit_release(void *calldata)
8115{
8116 struct nfs4_layoutcommit_data *data = calldata;
8117
db29c089 8118 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8119 nfs_post_op_update_inode_force_wcc(data->args.inode,
8120 data->res.fattr);
863a3c6c 8121 put_rpccred(data->cred);
472e2594 8122 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8123 kfree(data);
8124}
8125
8126static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8127 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8128 .rpc_call_done = nfs4_layoutcommit_done,
8129 .rpc_release = nfs4_layoutcommit_release,
8130};
8131
8132int
ef311537 8133nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8134{
8135 struct rpc_message msg = {
8136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8137 .rpc_argp = &data->args,
8138 .rpc_resp = &data->res,
8139 .rpc_cred = data->cred,
8140 };
8141 struct rpc_task_setup task_setup_data = {
8142 .task = &data->task,
8143 .rpc_client = NFS_CLIENT(data->args.inode),
8144 .rpc_message = &msg,
8145 .callback_ops = &nfs4_layoutcommit_ops,
8146 .callback_data = data,
863a3c6c
AA		 8147 };
8148 struct rpc_task *task;
8149 int status = 0;
8150
8151 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8152 "lbw: %llu inode %lu\n",
8153 data->task.tk_pid, sync,
8154 data->args.lastbytewritten,
8155 data->args.inode->i_ino);
8156
472e2594
TM		 8157 if (!sync) {
8158 data->inode = nfs_igrab_and_active(data->args.inode);
8159 if (data->inode == NULL) {
8160 nfs4_layoutcommit_release(data);
8161 return -EAGAIN;
8162 }
8163 task_setup_data.flags = RPC_TASK_ASYNC;
8164 }
a9c92d6b 8165 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8166 task = rpc_run_task(&task_setup_data);
8167 if (IS_ERR(task))
8168 return PTR_ERR(task);
472e2594
TM		 8169 if (sync)
8170 status = task->tk_status;
1037e6ea 8171 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8172 dprintk("%s: status %d\n", __func__, status);
8173 rpc_put_task(task);
8174 return status;
8175}
fca78d6d 8176
97431204
AA		 8177/**
8178 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8179 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8180 */
fca78d6d
BS		 8181static int
8182_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8183 struct nfs_fsinfo *info,
8184 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8185{
8186 struct nfs41_secinfo_no_name_args args = {
8187 .style = SECINFO_STYLE_CURRENT_FH,
8188 };
8189 struct nfs4_secinfo_res res = {
8190 .flavors = flavors,
8191 };
8192 struct rpc_message msg = {
8193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8194 .rpc_argp = &args,
8195 .rpc_resp = &res,
8196 };
b1b3e136 8197 struct rpc_clnt *clnt = server->client;
7cb852df 8198 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8199 int status;
8200
8201 if (use_integrity) {
8202 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8203 cred = nfs4_get_clid_cred(server->nfs_client);
8204 msg.rpc_cred = cred;
b1b3e136
WAA		 8205 }
8206
8207 dprintk("--> %s\n", __func__);
8208 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8209 &res.seq_res, 0);
8210 dprintk("<-- %s status=%d\n", __func__, status);
8211
7cb852df
WAA		 8212 if (cred)
8213 put_rpccred(cred);
b1b3e136
WAA		 8214
8215 return status;
fca78d6d
BS		 8216}
8217
8218static int
8219nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8220 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8221{
8222 struct nfs4_exception exception = { };
8223 int err;
8224 do {
b1b3e136
WAA		 8225 /* first try using integrity protection */
8226 err = -NFS4ERR_WRONGSEC;
8227
8228 /* try to use integrity protection with machine cred */
8229 if (_nfs4_is_integrity_protected(server->nfs_client))
8230 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8231 flavors, true);
8232
8233 /*
8234 * if unable to use integrity protection, or SECINFO with
8235 * integrity protection returns NFS4ERR_WRONGSEC (which is
8236 * disallowed by spec, but exists in deployed servers) use
8237 * the current filesystem's rpc_client and the user cred.
8238 */
8239 if (err == -NFS4ERR_WRONGSEC)
8240 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8241 flavors, false);
8242
fca78d6d
BS		 8243 switch (err) {
8244 case 0:
8245 case -NFS4ERR_WRONGSEC:
78b19bae 8246 case -ENOTSUPP:
05e9cfb4 8247 goto out;
fca78d6d
BS		 8248 default:
8249 err = nfs4_handle_exception(server, err, &exception);
8250 }
8251 } while (exception.retry);
05e9cfb4 8252out:
fca78d6d
BS		 8253 return err;
8254}
8255
8256static int
8257nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8258 struct nfs_fsinfo *info)
8259{
8260 int err;
8261 struct page *page;
367156d9 8262 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8263 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8264 struct nfs4_secinfo4 *secinfo;
8265 int i;
fca78d6d
BS		 8266
8267 page = alloc_page(GFP_KERNEL);
8268 if (!page) {
8269 err = -ENOMEM;
8270 goto out;
8271 }
8272
8273 flavors = page_address(page);
8274 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8275
8276 /*
8277 * Fall back on "guess and check" method if
8278 * the server doesn't support SECINFO_NO_NAME
8279 */
78b19bae 8280 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8281 err = nfs4_find_root_sec(server, fhandle, info);
8282 goto out_freepage;
8283 }
8284 if (err)
8285 goto out_freepage;
8286
58a8cf12
WAA		 8287 for (i = 0; i < flavors->num_flavors; i++) {
8288 secinfo = &flavors->flavors[i];
8289
8290 switch (secinfo->flavor) {
8291 case RPC_AUTH_NULL:
8292 case RPC_AUTH_UNIX:
8293 case RPC_AUTH_GSS:
8294 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8295 &secinfo->flavor_info);
8296 break;
8297 default:
8298 flavor = RPC_AUTH_MAXFLAVOR;
8299 break;
8300 }
8301
4d4b69dd
WAA		 8302 if (!nfs_auth_info_match(&server->auth_info, flavor))
8303 flavor = RPC_AUTH_MAXFLAVOR;
8304
58a8cf12
WAA		 8305 if (flavor != RPC_AUTH_MAXFLAVOR) {
8306 err = nfs4_lookup_root_sec(server, fhandle,
8307 info, flavor);
8308 if (!err)
8309 break;
8310 }
8311 }
8312
8313 if (flavor == RPC_AUTH_MAXFLAVOR)
8314 err = -EPERM;
fca78d6d
BS		 8315
8316out_freepage:
8317 put_page(page);
8318 if (err == -EACCES)
8319 return -EPERM;
8320out:
8321 return err;
8322}
1cab0652 8323
ab7cb0df
TM		 8324static int _nfs41_test_stateid(struct nfs_server *server,
8325 nfs4_stateid *stateid,
8326 struct rpc_cred *cred)
7d974794
BS		 8327{
8328 int status;
8329 struct nfs41_test_stateid_args args = {
1cab0652 8330 .stateid = stateid,
7d974794
BS		 8331 };
8332 struct nfs41_test_stateid_res res;
8333 struct rpc_message msg = {
8334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8335 .rpc_argp = &args,
8336 .rpc_resp = &res,
ab7cb0df 8337 .rpc_cred = cred,
7d974794 8338 };
3787d506
WAA		 8339 struct rpc_clnt *rpc_client = server->client;
8340
8341 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8342 &rpc_client, &msg);
1cab0652 8343
38527b15 8344 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8345 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8346 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8347 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8348 &args.seq_args, &res.seq_res);
38527b15
CL		 8349 if (status != NFS_OK) {
8350 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8351 return status;
38527b15
CL		 8352 }
8353 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8354 return -res.status;
7d974794
BS		 8355}
8356
38527b15
CL		 8357/**
8358 * nfs41_test_stateid - perform a TEST_STATEID operation
8359 *
8360 * @server: server / transport on which to perform the operation
8361 * @stateid: state ID to test
ab7cb0df 8362 * @cred: credential
38527b15
CL		 8363 *
8364 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8365 * Otherwise a negative NFS4ERR value is returned if the operation
8366 * failed or the state ID is not currently valid.
8367 */
ab7cb0df
TM		 8368static int nfs41_test_stateid(struct nfs_server *server,
8369 nfs4_stateid *stateid,
8370 struct rpc_cred *cred)
7d974794
BS		 8371{
8372 struct nfs4_exception exception = { };
8373 int err;
8374 do {
ab7cb0df 8375 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8376 if (err != -NFS4ERR_DELAY)
8377 break;
8378 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8379 } while (exception.retry);
8380 return err;
8381}
9aeda35f 8382
7c1d5fae
TM		 8383struct nfs_free_stateid_data {
8384 struct nfs_server *server;
8385 struct nfs41_free_stateid_args args;
9aeda35f 8386 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8387};
8388
8389static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8390{
8391 struct nfs_free_stateid_data *data = calldata;
8392 nfs41_setup_sequence(nfs4_get_session(data->server),
8393 &data->args.seq_args,
8394 &data->res.seq_res,
8395 task);
8396}
8397
8398static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8399{
8400 struct nfs_free_stateid_data *data = calldata;
8401
8402 nfs41_sequence_done(task, &data->res.seq_res);
8403
8404 switch (task->tk_status) {
8405 case -NFS4ERR_DELAY:
8478eaa1 8406 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8407 rpc_restart_call_prepare(task);
8408 }
8409}
8410
8411static void nfs41_free_stateid_release(void *calldata)
8412{
8413 kfree(calldata);
8414}
8415
17f26b12 8416static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8417 .rpc_call_prepare = nfs41_free_stateid_prepare,
8418 .rpc_call_done = nfs41_free_stateid_done,
8419 .rpc_release = nfs41_free_stateid_release,
8420};
8421
8422static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8423 nfs4_stateid *stateid,
ab7cb0df 8424 struct rpc_cred *cred,
7c1d5fae
TM		 8425 bool privileged)
8426{
9aeda35f
BS		 8427 struct rpc_message msg = {
8428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8429 .rpc_cred = cred,
9aeda35f 8430 };
7c1d5fae
TM		 8431 struct rpc_task_setup task_setup = {
8432 .rpc_client = server->client,
8433 .rpc_message = &msg,
8434 .callback_ops = &nfs41_free_stateid_ops,
8435 .flags = RPC_TASK_ASYNC,
8436 };
8437 struct nfs_free_stateid_data *data;
9aeda35f 8438
3787d506
WAA		 8439 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8440 &task_setup.rpc_client, &msg);
8441
38527b15 8442 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8443 data = kmalloc(sizeof(*data), GFP_NOFS);
8444 if (!data)
8445 return ERR_PTR(-ENOMEM);
8446 data->server = server;
8447 nfs4_stateid_copy(&data->args.stateid, stateid);
8448
8449 task_setup.callback_data = data;
8450
8451 msg.rpc_argp = &data->args;
8452 msg.rpc_resp = &data->res;
a9c92d6b 8453 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8454 if (privileged)
8455 nfs4_set_sequence_privileged(&data->args.seq_args);
8456
8457 return rpc_run_task(&task_setup);
9aeda35f
BS		 8458}
8459
38527b15
CL		 8460/**
8461 * nfs41_free_stateid - perform a FREE_STATEID operation
8462 *
8463 * @server: server / transport on which to perform the operation
8464 * @stateid: state ID to release
ab7cb0df 8465 * @cred: credential
38527b15
CL		 8466 *
8467 * Returns NFS_OK if the server freed "stateid". Otherwise a
8468 * negative NFS4ERR value is returned.
8469 */
ab7cb0df
TM		 8470static int nfs41_free_stateid(struct nfs_server *server,
8471 nfs4_stateid *stateid,
8472 struct rpc_cred *cred)
9aeda35f 8473{
7c1d5fae
TM		 8474 struct rpc_task *task;
8475 int ret;
8476
ab7cb0df 8477 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8478 if (IS_ERR(task))
8479 return PTR_ERR(task);
8480 ret = rpc_wait_for_completion_task(task);
8481 if (!ret)
8482 ret = task->tk_status;
8483 rpc_put_task(task);
8484 return ret;
9aeda35f 8485}
36281caa 8486
f1cdae87
JL		 8487static void
8488nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8489{
8490 struct rpc_task *task;
ab7cb0df 8491 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8492
ab7cb0df 8493 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8494 nfs4_free_lock_state(server, lsp);
8495 if (IS_ERR(task))
f1cdae87 8496 return;
c8b2d0bf 8497 rpc_put_task(task);
c8b2d0bf
TM		 8498}
8499
36281caa
TM		 8500static bool nfs41_match_stateid(const nfs4_stateid *s1,
8501 const nfs4_stateid *s2)
8502{
2d2f24ad 8503 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8504 return false;
8505
2d2f24ad 8506 if (s1->seqid == s2->seqid)
36281caa 8507 return true;
2d2f24ad 8508 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8509 return true;
8510
8511 return false;
8512}
8513
557134a3
AA		 8514#endif /* CONFIG_NFS_V4_1 */
8515
36281caa
TM		 8516static bool nfs4_match_stateid(const nfs4_stateid *s1,
8517 const nfs4_stateid *s2)
8518{
f597c537 8519 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8520}
8521
8522
17280175 8523static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8524 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8525 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8526 .recover_open = nfs4_open_reclaim,
8527 .recover_lock = nfs4_lock_reclaim,
591d71cb 8528 .establish_clid = nfs4_init_clientid,
05f4c350 8529 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8530};
8531
591d71cb 8532#if defined(CONFIG_NFS_V4_1)
17280175 8533static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8534 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8535 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8536 .recover_open = nfs4_open_reclaim,
8537 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8538 .establish_clid = nfs41_init_clientid,
fce5c838 8539 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8540 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8541};
8542#endif /* CONFIG_NFS_V4_1 */
8543
17280175 8544static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8545 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8546 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8547 .recover_open = nfs40_open_expired,
591d71cb
AA		 8548 .recover_lock = nfs4_lock_expired,
8549 .establish_clid = nfs4_init_clientid,
8550};
8551
8552#if defined(CONFIG_NFS_V4_1)
17280175 8553static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8554 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8555 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8556 .recover_open = nfs41_open_expired,
8557 .recover_lock = nfs41_lock_expired,
4d643d1d 8558 .establish_clid = nfs41_init_clientid,
1da177e4 8559};
591d71cb 8560#endif /* CONFIG_NFS_V4_1 */
1da177e4 8561
17280175 8562static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8563 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8564 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8565 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8566};
8567
8568#if defined(CONFIG_NFS_V4_1)
17280175 8569static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8570 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8571 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8572 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8573};
8574#endif
8575
ec011fe8 8576static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8577 .get_locations = _nfs40_proc_get_locations,
44c99933 8578 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8579};
8580
8581#if defined(CONFIG_NFS_V4_1)
8582static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8583 .get_locations = _nfs41_proc_get_locations,
44c99933 8584 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8585};
8586#endif /* CONFIG_NFS_V4_1 */
8587
97dc1359
TM		 8588static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8589 .minor_version = 0,
39c6daae
TM		 8590 .init_caps = NFS_CAP_READDIRPLUS
8591 | NFS_CAP_ATOMIC_OPEN
8592 | NFS_CAP_CHANGE_ATTR
8593 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8594 .init_client = nfs40_init_client,
8595 .shutdown_client = nfs40_shutdown_client,
36281caa 8596 .match_stateid = nfs4_match_stateid,
fca78d6d 8597 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8598 .free_lock_state = nfs4_release_lockowner,
63f5f796 8599 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8600 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8601 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8602 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8603 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8604 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8605};
8606
8607#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8608static struct nfs_seqid *
8609nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8610{
8611 return NULL;
8612}
8613
97dc1359
TM		 8614static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8615 .minor_version = 1,
39c6daae
TM		 8616 .init_caps = NFS_CAP_READDIRPLUS
8617 | NFS_CAP_ATOMIC_OPEN
8618 | NFS_CAP_CHANGE_ATTR
3b66486c 8619 | NFS_CAP_POSIX_LOCK
49f9a0fa 8620 | NFS_CAP_STATEID_NFSV41
e983120e 8621 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8622 .init_client = nfs41_init_client,
8623 .shutdown_client = nfs41_shutdown_client,
36281caa 8624 .match_stateid = nfs41_match_stateid,
fca78d6d 8625 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8626 .free_lock_state = nfs41_free_lock_state,
63f5f796 8627 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8628 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8629 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8630 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8631 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8632 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8633};
8634#endif
8635
42c2c424
SD		 8636#if defined(CONFIG_NFS_V4_2)
8637static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8638 .minor_version = 2,
7017310a
BS		 8639 .init_caps = NFS_CAP_READDIRPLUS
8640 | NFS_CAP_ATOMIC_OPEN
8641 | NFS_CAP_CHANGE_ATTR
8642 | NFS_CAP_POSIX_LOCK
8643 | NFS_CAP_STATEID_NFSV41
e983120e 8644 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8645 | NFS_CAP_ALLOCATE
624bd5b7 8646 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8647 | NFS_CAP_SEEK
8648 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8649 .init_client = nfs41_init_client,
8650 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8651 .match_stateid = nfs41_match_stateid,
8652 .find_root_sec = nfs41_find_root_sec,
7017310a 8653 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8654 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8655 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8656 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8657 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8658 .state_renewal_ops = &nfs41_state_renewal_ops,
8659};
8660#endif
8661
97dc1359
TM		 8662const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8663 [0] = &nfs_v4_0_minor_ops,
8664#if defined(CONFIG_NFS_V4_1)
8665 [1] = &nfs_v4_1_minor_ops,
8666#endif
42c2c424
SD		 8667#if defined(CONFIG_NFS_V4_2)
8668 [2] = &nfs_v4_2_minor_ops,
8669#endif
97dc1359
TM		 8670};
8671
17f26b12 8672static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8673 .create = nfs_create,
8674 .lookup = nfs_lookup,
8675 .atomic_open = nfs_atomic_open,
8676 .link = nfs_link,
8677 .unlink = nfs_unlink,
8678 .symlink = nfs_symlink,
8679 .mkdir = nfs_mkdir,
8680 .rmdir = nfs_rmdir,
8681 .mknod = nfs_mknod,
8682 .rename = nfs_rename,
8683 .permission = nfs_permission,
8684 .getattr = nfs_getattr,
8685 .setattr = nfs_setattr,
8686 .getxattr = generic_getxattr,
8687 .setxattr = generic_setxattr,
8688 .listxattr = generic_listxattr,
8689 .removexattr = generic_removexattr,
8690};
8691
92e1d5be 8692static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8693 .permission = nfs_permission,
8694 .getattr = nfs_getattr,
8695 .setattr = nfs_setattr,
64c2ce8b
AK		 8696 .getxattr = generic_getxattr,
8697 .setxattr = generic_setxattr,
8698 .listxattr = generic_listxattr,
8699 .removexattr = generic_removexattr,
6b3b5496
BF		 8700};
8701
509de811 8702const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8703 .version = 4, /* protocol version */
8704 .dentry_ops = &nfs4_dentry_operations,
8705 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8706 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8707 .file_ops = &nfs4_file_operations,
1da177e4 8708 .getroot = nfs4_proc_get_root,
281cad46 8709 .submount = nfs4_submount,
ff9099f2 8710 .try_mount = nfs4_try_mount,
1da177e4
LT		 8711 .getattr = nfs4_proc_getattr,
8712 .setattr = nfs4_proc_setattr,
8713 .lookup = nfs4_proc_lookup,
8714 .access = nfs4_proc_access,
8715 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8716 .create = nfs4_proc_create,
8717 .remove = nfs4_proc_remove,
8718 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8719 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8720 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8721 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8722 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8723 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8724 .link = nfs4_proc_link,
8725 .symlink = nfs4_proc_symlink,
8726 .mkdir = nfs4_proc_mkdir,
8727 .rmdir = nfs4_proc_remove,
8728 .readdir = nfs4_proc_readdir,
8729 .mknod = nfs4_proc_mknod,
8730 .statfs = nfs4_proc_statfs,
8731 .fsinfo = nfs4_proc_fsinfo,
8732 .pathconf = nfs4_proc_pathconf,
e9326dca 8733 .set_capabilities = nfs4_server_capabilities,
1da177e4 8734 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8735 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8736 .read_setup = nfs4_proc_read_setup,
ec06c096 8737 .read_done = nfs4_read_done,
1da177e4 8738 .write_setup = nfs4_proc_write_setup,
788e7a89 8739 .write_done = nfs4_write_done,
1da177e4 8740 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8741 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8742 .commit_done = nfs4_commit_done,
1da177e4 8743 .lock = nfs4_proc_lock,
e50a1c2e 8744 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8745 .close_context = nfs4_close_context,
2b484297 8746 .open_context = nfs4_atomic_open,
011e2a7f 8747 .have_delegation = nfs4_have_delegation,
57ec14c5 8748 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8749 .alloc_client = nfs4_alloc_client,
45a52a02 8750 .init_client = nfs4_init_client,
cdb7eced 8751 .free_client = nfs4_free_client,
1179acc6
BS		 8752 .create_server = nfs4_create_server,
8753 .clone_server = nfs_clone_server,
1da177e4
LT		 8754};
8755
64c2ce8b
AK		 8756static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8757 .prefix = XATTR_NAME_NFSV4_ACL,
8758 .list = nfs4_xattr_list_nfs4_acl,
8759 .get = nfs4_xattr_get_nfs4_acl,
8760 .set = nfs4_xattr_set_nfs4_acl,
8761};
8762
8763const struct xattr_handler *nfs4_xattr_handlers[] = {
8764 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8765#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8766 &nfs4_xattr_nfs4_label_handler,
8767#endif
64c2ce8b
AK		 8768 NULL
8769};
8770
1da177e4
LT		 8771/*
8772 * Local variables:
8773 * c-basic-offset: 8
8774 * End:
8775 */
Linux 6.x block layer and io_uring tree(s)