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NFSv4: nfs4_state_manager() vs. nfs_server_remove_lists()
[deliverable/linux.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
65de872e
TM		 317static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
318{
319 int res = 0;
320
321 might_sleep();
322
323 if (*timeout <= 0)
324 *timeout = NFS4_POLL_RETRY_MIN;
325 if (*timeout > NFS4_POLL_RETRY_MAX)
326 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 327 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 328 if (fatal_signal_pending(current))
329 res = -ERESTARTSYS;
330 *timeout <<= 1;
331 return res;
332}
333
334/* This is the error handling routine for processes that are allowed
335 * to sleep.
336 */
b064eca2 337static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 338{
339 struct nfs_client *clp = server->nfs_client;
9e33bed5 340 struct nfs4_state *state = exception->state;
3114ea7a 341 struct inode *inode = exception->inode;
65de872e
TM		 342 int ret = errorcode;
343
344 exception->retry = 0;
345 switch(errorcode) {
346 case 0:
347 return 0;
3114ea7a 348 case -NFS4ERR_OPENMODE:
011e2a7f 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 350 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 351 exception->retry = 1;
352 return 0;
353 }
354 if (state == NULL)
355 break;
5d422301
TM		 356 ret = nfs4_schedule_stateid_recovery(server, state);
357 if (ret < 0)
358 break;
3114ea7a 359 goto wait_on_recovery;
a1d0b5ee 360 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 361 case -NFS4ERR_ADMIN_REVOKED:
362 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
364 nfs_remove_bad_delegation(inode);
365 exception->retry = 1;
366 break;
367 }
9e33bed5
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
0400a6b0 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
cab92c19 542 if (slot == NULL)
3bd2384a
CL		 543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
a13ce7c6 562 struct nfs4_slot *slot = res->sr_slot;
c10e4498 563 bool send_new_highest_used_slotid = false;
13615871 564
a13ce7c6 565 tbl = slot->table;
e3725ec0 566 session = tbl->session;
ea028ac9 567
35dc1d74 568 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 569 /* Be nice to the server: try to ensure that the last transmitted
570 * value for highest_user_slotid <= target_highest_slotid
571 */
572 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
573 send_new_highest_used_slotid = true;
574
a13ce7c6 575 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 576 send_new_highest_used_slotid = false;
577 goto out_unlock;
578 }
a13ce7c6 579 nfs4_free_slot(tbl, slot);
c10e4498
TM		 580
581 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
582 send_new_highest_used_slotid = false;
b75ad4cd 583out_unlock:
35dc1d74 584 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 585 res->sr_slot = NULL;
c10e4498
TM		 586 if (send_new_highest_used_slotid)
587 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 588}
589
f9c96fcc 590int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 591{
e3725ec0 592 struct nfs4_session *session;
a13ce7c6 593 struct nfs4_slot *slot = res->sr_slot;
14516c3a 594 struct nfs_client *clp;
ac20d163 595 bool interrupted = false;
85563073 596 int ret = 1;
b0df806c 597
a13ce7c6
TM		 598 if (slot == NULL)
599 goto out_noaction;
468f8613
BS		 600 /* don't increment the sequence number if the task wasn't sent */
601 if (!RPC_WAS_SENT(task))
b0df806c
AA		 602 goto out;
603
e3725ec0 604 session = slot->table->session;
933602e3 605
ac20d163
TM		 606 if (slot->interrupted) {
607 slot->interrupted = 0;
608 interrupted = true;
609 }
610
2f92ae34 611 trace_nfs4_sequence_done(session, res);
691daf3b 612 /* Check the SEQUENCE operation status */
14516c3a
TM		 613 switch (res->sr_status) {
614 case 0:
b0df806c 615 /* Update the slot's sequence and clientid lease timer */
933602e3 616 ++slot->seq_nr;
e3725ec0 617 clp = session->clp;
8e63b6a8 618 do_renew_lease(clp, res->sr_timestamp);
0629e370 619 /* Check sequence flags */
b4410c2f
TM		 620 if (res->sr_status_flags != 0)
621 nfs4_schedule_lease_recovery(clp);
464ee9f9 622 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 623 break;
ac20d163
TM		 624 case 1:
625 /*
626 * sr_status remains 1 if an RPC level error occurred.
627 * The server may or may not have processed the sequence
628 * operation..
629 * Mark the slot as having hosted an interrupted RPC call.
630 */
631 slot->interrupted = 1;
632 goto out;
14516c3a
TM		 633 case -NFS4ERR_DELAY:
634 /* The server detected a resend of the RPC call and
635 * returned NFS4ERR_DELAY as per Section 2.10.6.2
636 * of RFC5661.
637 */
df2fabff 638 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 639 __func__,
df2fabff 640 slot->slot_nr,
933602e3 641 slot->seq_nr);
14516c3a 642 goto out_retry;
85563073
TM		 643 case -NFS4ERR_BADSLOT:
644 /*
645 * The slot id we used was probably retired. Try again
646 * using a different slot id.
647 */
e8794440
TM		 648 goto retry_nowait;
649 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 650 /*
651 * Was the last operation on this sequence interrupted?
652 * If so, retry after bumping the sequence number.
653 */
654 if (interrupted) {
655 ++slot->seq_nr;
656 goto retry_nowait;
657 }
e8794440
TM		 658 /*
659 * Could this slot have been previously retired?
660 * If so, then the server may be expecting seq_nr = 1!
661 */
8e63b6a8
TM		 662 if (slot->seq_nr != 1) {
663 slot->seq_nr = 1;
664 goto retry_nowait;
665 }
666 break;
e8794440
TM		 667 case -NFS4ERR_SEQ_FALSE_RETRY:
668 ++slot->seq_nr;
669 goto retry_nowait;
14516c3a
TM		 670 default:
671 /* Just update the slot sequence no. */
933602e3 672 ++slot->seq_nr;
b0df806c
AA		 673 }
674out:
675 /* The session may be reset by one of the error handlers. */
676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 677 nfs41_sequence_free_slot(res);
a13ce7c6 678out_noaction:
85563073 679 return ret;
e8794440
TM		 680retry_nowait:
681 if (rpc_restart_call_prepare(task)) {
682 task->tk_status = 0;
683 ret = 0;
684 }
685 goto out;
14516c3a 686out_retry:
d05dd4e9 687 if (!rpc_restart_call(task))
14516c3a
TM		 688 goto out;
689 rpc_delay(task, NFS4_POLL_RETRY_MAX);
690 return 0;
b0df806c 691}
f9c96fcc 692EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 693
14516c3a
TM		 694static int nfs4_sequence_done(struct rpc_task *task,
695 struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455
TM		 702}
703
dc70d7b3 704int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
ce5039c1
AA		 707 struct rpc_task *task)
708{
fbcd4abc
AA		 709 struct nfs4_slot *slot;
710 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 711
712 dprintk("--> %s\n", __func__);
ce5039c1 713 /* slot already allocated? */
dfb4f309 714 if (res->sr_slot != NULL)
d9afbd1b 715 goto out_success;
ce5039c1 716
fbcd4abc
AA		 717 tbl = &session->fc_slot_table;
718
69d206b5
TM		 719 task->tk_timeout = 0;
720
fbcd4abc 721 spin_lock(&tbl->slot_tbl_lock);
774d5f14 722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 723 !args->sa_privileged) {
0b1c8fc4 724 /* The state manager will wait until the slot table is empty */
0b1c8fc4 725 dprintk("%s session is draining\n", __func__);
7b939a3f 726 goto out_sleep;
689cf5c1
AB		 727 }
728
2dc03b7f 729 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 730 if (IS_ERR(slot)) {
731 /* If out of memory, try again in 1/4 second */
732 if (slot == ERR_PTR(-ENOMEM))
733 task->tk_timeout = HZ >> 2;
fbcd4abc 734 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 735 goto out_sleep;
fbcd4abc
AA		 736 }
737 spin_unlock(&tbl->slot_tbl_lock);
738
2b2fa717 739 args->sa_slot = slot;
fbcd4abc 740
e8d92382 741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 742 slot->slot_nr, slot->seq_nr);
fbcd4abc 743
dfb4f309 744 res->sr_slot = slot;
8e63b6a8 745 res->sr_timestamp = jiffies;
2a6e26cd 746 res->sr_status_flags = 0;
fbcd4abc
AA		 747 /*
748 * sr_status is only set in decode_sequence, and so will remain
749 * set to 1 if an rpc level failure occurs.
750 */
751 res->sr_status = 1;
2f92ae34 752 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 753out_success:
754 rpc_call_start(task);
ce5039c1 755 return 0;
7b939a3f 756out_sleep:
8fe72bac
TM		 757 /* Privileged tasks are queued with top priority */
758 if (args->sa_privileged)
1e1093c7
TM		 759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
760 NULL, RPC_PRIORITY_PRIVILEGED);
761 else
762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 763 spin_unlock(&tbl->slot_tbl_lock);
764 return -EAGAIN;
ce5039c1 765}
dc70d7b3 766EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 767
5a580e0a
CL		 768static int nfs4_setup_sequence(const struct nfs_server *server,
769 struct nfs4_sequence_args *args,
770 struct nfs4_sequence_res *res,
771 struct rpc_task *task)
ce5039c1 772{
035168ab 773 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 774 int ret = 0;
775
3bd2384a
CL		 776 if (!session)
777 return nfs40_setup_sequence(server, 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{
3bd2384a 818 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 819}
820
821static int nfs4_sequence_done(struct rpc_task *task,
822 struct nfs4_sequence_res *res)
823{
3bd2384a 824 return nfs40_sequence_done(task, res);
9915ea7e 825}
3bd2384a
CL		 826
827#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 828
829static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
830{
831 struct nfs4_call_sync_data *data = calldata;
832 nfs4_setup_sequence(data->seq_server,
833 data->seq_args, data->seq_res, task);
834}
835
836static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_sequence_done(task, data->seq_res);
840}
841
842static const struct rpc_call_ops nfs40_call_sync_ops = {
843 .rpc_call_prepare = nfs40_call_sync_prepare,
844 .rpc_call_done = nfs40_call_sync_done,
845};
846
7c513058
BS		 847static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
848 struct nfs_server *server,
ce5039c1
AA		 849 struct rpc_message *msg,
850 struct nfs4_sequence_args *args,
8fe72bac 851 struct nfs4_sequence_res *res)
ce5039c1
AA		 852{
853 int ret;
854 struct rpc_task *task;
9915ea7e 855 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 856 struct nfs4_call_sync_data data = {
035168ab 857 .seq_server = server,
ce5039c1
AA		 858 .seq_args = args,
859 .seq_res = res,
ce5039c1
AA		 860 };
861 struct rpc_task_setup task_setup = {
7c513058 862 .rpc_client = clnt,
ce5039c1 863 .rpc_message = msg,
9915ea7e 864 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 865 .callback_data = &data
866 };
867
ce5039c1
AA		 868 task = rpc_run_task(&task_setup);
869 if (IS_ERR(task))
870 ret = PTR_ERR(task);
871 else {
872 ret = task->tk_status;
873 rpc_put_task(task);
874 }
875 return ret;
876}
877
fd0c0953 878static
7c513058
BS		 879int nfs4_call_sync(struct rpc_clnt *clnt,
880 struct nfs_server *server,
e73b83f2
BS		 881 struct rpc_message *msg,
882 struct nfs4_sequence_args *args,
883 struct nfs4_sequence_res *res,
884 int cache_reply)
885{
a9c92d6b 886 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 887 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 888}
cccef3b9 889
38478b24 890static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 891{
38478b24 892 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 893
38478b24 894 spin_lock(&dir->i_lock);
359d7d1c 895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 896 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 897 nfs_force_lookup_revalidate(dir);
a9a4a87a 898 dir->i_version = cinfo->after;
de242c0b 899 nfs_fscache_invalidate(dir);
38478b24 900 spin_unlock(&dir->i_lock);
1da177e4
LT		 901}
902
e56e0b78 903struct nfs4_opendata {
c6d00e63 904 struct kref kref;
e56e0b78
TM		 905 struct nfs_openargs o_arg;
906 struct nfs_openres o_res;
cdd4e68b
TM		 907 struct nfs_open_confirmargs c_arg;
908 struct nfs_open_confirmres c_res;
6926afd1
TM		 909 struct nfs4_string owner_name;
910 struct nfs4_string group_name;
e56e0b78 911 struct nfs_fattr f_attr;
1775fd3e 912 struct nfs4_label *f_label;
e56e0b78 913 struct dentry *dir;
82a2c1b7 914 struct dentry *dentry;
e56e0b78 915 struct nfs4_state_owner *owner;
aac00a8d 916 struct nfs4_state *state;
e56e0b78 917 struct iattr attrs;
26e976a8 918 unsigned long timestamp;
3e309914 919 unsigned int rpc_done : 1;
5bc2afc2 920 unsigned int file_created : 1;
bdeca1b7 921 unsigned int is_recover : 1;
24ac23ab
TM		 922 int rpc_status;
923 int cancelled;
e56e0b78
TM		 924};
925
49f9a0fa
TM		 926static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
927 int err, struct nfs4_exception *exception)
928{
929 if (err != -EINVAL)
930 return false;
931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
932 return false;
933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
934 exception->retry = 1;
935 return true;
936}
937
938static enum open_claim_type4
939nfs4_map_atomic_open_claim(struct nfs_server *server,
940 enum open_claim_type4 claim)
941{
942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
943 return claim;
944 switch (claim) {
945 default:
946 return claim;
947 case NFS4_OPEN_CLAIM_FH:
948 return NFS4_OPEN_CLAIM_NULL;
949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
950 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
953 }
954}
2ced46c2
TM		 955
956static void nfs4_init_opendata_res(struct nfs4_opendata *p)
957{
958 p->o_res.f_attr = &p->f_attr;
1775fd3e 959 p->o_res.f_label = p->f_label;
c1d51931
TM		 960 p->o_res.seqid = p->o_arg.seqid;
961 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 962 p->o_res.server = p->o_arg.server;
5f657530 963 p->o_res.access_request = p->o_arg.access;
2ced46c2 964 nfs_fattr_init(&p->f_attr);
6926afd1 965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 966}
967
82a2c1b7 968static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 969 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 970 const struct iattr *attrs,
1775fd3e 971 struct nfs4_label *label,
4a1c0893 972 enum open_claim_type4 claim,
8535b2be 973 gfp_t gfp_mask)
e56e0b78 974{
82a2c1b7 975 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 976 struct inode *dir = parent->d_inode;
977 struct nfs_server *server = NFS_SERVER(dir);
978 struct nfs4_opendata *p;
979
8535b2be 980 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 981 if (p == NULL)
982 goto err;
14c43f76
DQ		 983
984 p->f_label = nfs4_label_alloc(server, gfp_mask);
985 if (IS_ERR(p->f_label))
986 goto err_free_p;
987
8535b2be 988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 989 if (p->o_arg.seqid == NULL)
14c43f76 990 goto err_free_label;
82a2c1b7
AV		 991 nfs_sb_active(dentry->d_sb);
992 p->dentry = dget(dentry);
e56e0b78
TM		 993 p->dir = parent;
994 p->owner = sp;
995 atomic_inc(&sp->so_count);
dc0b027d
TM		 996 p->o_arg.open_flags = flags;
997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
999 * will return permission denied for all bits until close */
1000 if (!(flags & O_EXCL)) {
1001 /* ask server to check for all possible rights as results
1002 * are cached */
1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1005 }
7539bbab 1006 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1009 p->o_arg.name = &dentry->d_name;
e56e0b78 1010 p->o_arg.server = server;
aa9c2669 1011 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1013 p->o_arg.label = label;
49f9a0fa
TM		 1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1015 switch (p->o_arg.claim) {
4a1c0893
TM		 1016 case NFS4_OPEN_CLAIM_NULL:
1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1019 p->o_arg.fh = NFS_FH(dir);
1020 break;
1021 case NFS4_OPEN_CLAIM_PREVIOUS:
1022 case NFS4_OPEN_CLAIM_FH:
1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1025 p->o_arg.fh = NFS_FH(dentry->d_inode);
1026 }
536e43d1 1027 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1028 __u32 verf[2];
d77d76ff 1029
e56e0b78
TM		 1030 p->o_arg.u.attrs = &p->attrs;
1031 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1032
1033 verf[0] = jiffies;
1034 verf[1] = current->pid;
1035 memcpy(p->o_arg.u.verifier.data, verf,
1036 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1037 }
cdd4e68b
TM		 1038 p->c_arg.fh = &p->o_res.fh;
1039 p->c_arg.stateid = &p->o_res.stateid;
1040 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1041 nfs4_init_opendata_res(p);
c6d00e63 1042 kref_init(&p->kref);
e56e0b78 1043 return p;
14c43f76
DQ		 1044
1045err_free_label:
1046 nfs4_label_free(p->f_label);
1047err_free_p:
e56e0b78
TM		 1048 kfree(p);
1049err:
1050 dput(parent);
1051 return NULL;
1052}
1053
c6d00e63 1054static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1055{
c6d00e63
TM		 1056 struct nfs4_opendata *p = container_of(kref,
1057 struct nfs4_opendata, kref);
82a2c1b7 1058 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1059
1060 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1061 if (p->state != NULL)
1062 nfs4_put_open_state(p->state);
c6d00e63 1063 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1064
1065 nfs4_label_free(p->f_label);
1066
c6d00e63 1067 dput(p->dir);
82a2c1b7
AV		 1068 dput(p->dentry);
1069 nfs_sb_deactive(sb);
6926afd1 1070 nfs_fattr_free_names(&p->f_attr);
e911b815 1071 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1072 kfree(p);
1073}
1074
1075static void nfs4_opendata_put(struct nfs4_opendata *p)
1076{
1077 if (p != NULL)
1078 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1079}
1080
06f814a3
TM		 1081static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1082{
06f814a3
TM		 1083 int ret;
1084
06f814a3 1085 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1086 return ret;
1087}
1088
dc0b027d 1089static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1090{
1091 int ret = 0;
dc0b027d 1092
536e43d1 1093 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1094 goto out;
1095 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1096 case FMODE_READ:
88069f77
TM		 1097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1098 && state->n_rdonly != 0;
6ee41268
TM		 1099 break;
1100 case FMODE_WRITE:
88069f77
TM		 1101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1102 && state->n_wronly != 0;
6ee41268
TM		 1103 break;
1104 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1106 && state->n_rdwr != 0;
6ee41268 1107 }
dc0b027d 1108out:
6ee41268
TM		 1109 return ret;
1110}
1111
dc0b027d 1112static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1113{
652f89f6
TM		 1114 if (delegation == NULL)
1115 return 0;
dc0b027d 1116 if ((delegation->type & fmode) != fmode)
aac00a8d 1117 return 0;
15c831bf 1118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1119 return 0;
d25be546
TM		 1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 return 0;
b7391f44 1122 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1123 return 1;
1124}
1125
dc0b027d 1126static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1127{
dc0b027d 1128 switch (fmode) {
e7616923
TM		 1129 case FMODE_WRITE:
1130 state->n_wronly++;
1131 break;
1132 case FMODE_READ:
1133 state->n_rdonly++;
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 state->n_rdwr++;
1137 }
dc0b027d 1138 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1139}
1140
4f14c194
TM		 1141static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1142{
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1145
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1152 if (need_recover)
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1154}
1155
e999e80e
TM		 1156static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1158{
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1160 return true;
4f14c194
TM		 1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1163 return true;
4f14c194 1164 }
e999e80e
TM		 1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1166 return true;
1167 return false;
1168}
1169
226056c5
TM		 1170static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1172{
226056c5
TM		 1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1175 case FMODE_WRITE:
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1177 break;
1178 case FMODE_READ:
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1180 break;
1181 case 0:
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1185 }
1186 if (stateid == NULL)
1187 return;
1188 if (!nfs_need_update_open_stateid(state, stateid))
1189 return;
003707c7 1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1193}
1194
1195static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1196{
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
4f14c194
TM		 1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1202}
1203
dc0b027d 1204static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1205{
dc0b027d 1206 switch (fmode) {
003707c7
TM		 1207 case FMODE_READ:
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 break;
1210 case FMODE_WRITE:
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1212 break;
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1215 }
e999e80e
TM		 1216 if (!nfs_need_update_open_stateid(state, stateid))
1217 return;
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1221}
1222
dc0b027d 1223static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1224{
8bda4e4c
TM		 1225 /*
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1228 */
1229 write_seqlock(&state->seqlock);
003707c7 1230 if (deleg_stateid != NULL) {
f597c537 1231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1233 }
1234 if (open_stateid != NULL)
dc0b027d 1235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
dc0b027d 1238 update_open_stateflags(state, fmode);
ec073428 1239 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1240}
1241
dc0b027d 1242static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1243{
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1246 int ret = 0;
1247
dc0b027d 1248 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1249
1250 rcu_read_lock();
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1253 goto no_delegation;
1254
1255 spin_lock(&deleg_cur->lock);
17f26b12 1256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1258 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1259 goto no_delegation_unlock;
1260
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
f597c537 1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1264 goto no_delegation_unlock;
1265
b7391f44 1266 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1268 ret = 1;
1269no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1271no_delegation:
1272 rcu_read_unlock();
1273
1274 if (!ret && open_stateid != NULL) {
dc0b027d 1275 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1276 ret = 1;
1277 }
4f14c194
TM		 1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1280
1281 return ret;
1282}
1283
1284
dc0b027d 1285static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1286{
1287 struct nfs_delegation *delegation;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1292 rcu_read_unlock();
1293 return;
1294 }
1295 rcu_read_unlock();
57ec14c5 1296 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1297}
1298
6ee41268 1299static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1300{
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
f448badd 1304 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1305 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1306 nfs4_stateid stateid;
1307 int ret = -EAGAIN;
1308
aac00a8d 1309 for (;;) {
dc0b027d 1310 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1311 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1312 if (can_open_cached(state, fmode, open_mode)) {
1313 update_open_stateflags(state, fmode);
6ee41268 1314 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1315 goto out_return_state;
1316 }
1317 spin_unlock(&state->owner->so_lock);
1318 }
34310430
TM		 1319 rcu_read_lock();
1320 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1321 if (!can_open_delegated(delegation, fmode)) {
34310430 1322 rcu_read_unlock();
aac00a8d 1323 break;
34310430 1324 }
aac00a8d 1325 /* Save the delegation */
f597c537 1326 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1327 rcu_read_unlock();
fa332941 1328 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1331 if (ret != 0)
1332 goto out;
1333 }
aac00a8d 1334 ret = -EAGAIN;
34310430
TM		 1335
1336 /* Try to update the stateid using the delegation */
dc0b027d 1337 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1338 goto out_return_state;
aac00a8d 1339 }
aac00a8d
TM		 1340out:
1341 return ERR_PTR(ret);
1342out_return_state:
1343 atomic_inc(&state->count);
1344 return state;
1345}
1346
e23008ec
AA		 1347static void
1348nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1349{
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1356 if (delegation)
1357 delegation_flags = delegation->flags;
1358 rcu_read_unlock();
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1363 clp->cl_hostname);
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1367 &data->o_res);
1368 else
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1371 &data->o_res);
1372}
1373
1374/*
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1377 */
1378static struct nfs4_state *
1379_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1380{
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1383 int ret;
1384
d2bfda2e
WAA		 1385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1388 goto err;
1389 }
1390 /* cached opens have already been processed */
1391 goto update;
e23008ec
AA		 1392 }
1393
e23008ec
AA		 1394 ret = nfs_refresh_inode(inode, &data->f_attr);
1395 if (ret)
1396 goto err;
1397
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1400update:
e23008ec
AA		 1401 update_open_stateid(state, &data->o_res.stateid, NULL,
1402 data->o_arg.fmode);
d49f042a 1403 atomic_inc(&state->count);
e23008ec
AA		 1404
1405 return state;
1406err:
1407 return ERR_PTR(ret);
1408
1409}
1410
1411static struct nfs4_state *
1412_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1413{
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
1b370bc2 1416 int ret;
24ac23ab 1417
aac00a8d 1418 if (!data->rpc_done) {
6ee41268 1419 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1420 goto out;
1421 }
1422
1b370bc2 1423 ret = -EAGAIN;
24ac23ab 1424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1425 goto err;
1775fd3e 1426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1427 ret = PTR_ERR(inode);
03f28e3a 1428 if (IS_ERR(inode))
1b370bc2
TM		 1429 goto err;
1430 ret = -ENOMEM;
24ac23ab
TM		 1431 state = nfs4_get_open_state(inode, data->owner);
1432 if (state == NULL)
1b370bc2 1433 goto err_put_inode;
e23008ec
AA		 1434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
34310430 1436 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1437 data->o_arg.fmode);
24ac23ab 1438 iput(inode);
aac00a8d 1439out:
7aa262b5 1440 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1441 return state;
1b370bc2
TM		 1442err_put_inode:
1443 iput(inode);
1444err:
1445 return ERR_PTR(ret);
24ac23ab
TM		 1446}
1447
e23008ec
AA		 1448static struct nfs4_state *
1449nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1450{
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1454}
1455
864472e9
TM		 1456static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1457{
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1460
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1464 continue;
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1467 return ctx;
1468 }
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1471}
1472
4a1c0893
TM		 1473static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1475{
1476 struct nfs4_opendata *opendata;
1477
4a1c0893 1478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1479 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1484 return opendata;
1485}
1486
dc0b027d 1487static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1488{
2ced46c2 1489 struct nfs4_state *newstate;
864472e9
TM		 1490 int ret;
1491
dc0b027d
TM		 1492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
b257957e 1497 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1498 if (ret != 0)
1499 return ret;
2ced46c2 1500 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
643168c2 1503 nfs4_close_state(newstate, fmode);
2ced46c2 1504 *res = newstate;
864472e9
TM		 1505 return 0;
1506}
1507
1508static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1509{
864472e9 1510 struct nfs4_state *newstate;
864472e9
TM		 1511 int ret;
1512
4f14c194
TM		 1513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1517 /* memory barrier prior to reading state->n_* */
2ced46c2 1518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1519 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1520 smp_rmb();
1521 if (state->n_rdwr != 0) {
2ced46c2 1522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1523 if (ret != 0)
1524 return ret;
2ced46c2
TM		 1525 if (newstate != state)
1526 return -ESTALE;
864472e9
TM		 1527 }
1528 if (state->n_wronly != 0) {
2ced46c2 1529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1530 if (ret != 0)
1531 return ret;
2ced46c2
TM		 1532 if (newstate != state)
1533 return -ESTALE;
864472e9
TM		 1534 }
1535 if (state->n_rdonly != 0) {
2ced46c2 1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1537 if (ret != 0)
1538 return ret;
2ced46c2
TM		 1539 if (newstate != state)
1540 return -ESTALE;
864472e9 1541 }
1ac7e2fd
TM		 1542 /*
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1545 */
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1548 write_seqlock(&state->seqlock);
1ac7e2fd 1549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1551 write_sequnlock(&state->seqlock);
1ac7e2fd 1552 }
864472e9
TM		 1553 return 0;
1554}
1555
1da177e4
LT		 1556/*
1557 * OPEN_RECLAIM:
1558 * reclaim state on the server after a reboot.
1da177e4 1559 */
539cd03a 1560static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1561{
1ac7e2fd 1562 struct nfs_delegation *delegation;
864472e9 1563 struct nfs4_opendata *opendata;
dc0b027d 1564 fmode_t delegation_type = 0;
1da177e4
LT		 1565 int status;
1566
4a1c0893
TM		 1567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
1ac7e2fd
TM		 1571 rcu_read_lock();
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1574 delegation_type = delegation->type;
1ac7e2fd 1575 rcu_read_unlock();
864472e9
TM		 1576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
c6d00e63 1578 nfs4_opendata_put(opendata);
1da177e4
LT		 1579 return status;
1580}
1581
539cd03a 1582static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1583{
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1586 int err;
1587 do {
539cd03a 1588 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1589 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1591 continue;
168667c4 1592 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1593 break;
1594 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1595 } while (exception.retry);
1596 return err;
1597}
1598
864472e9
TM		 1599static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1601 struct nfs_open_context *ctx;
1602 int ret;
1603
1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
91876b13 1606 return -EAGAIN;
539cd03a 1607 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1608 put_nfs_open_context(ctx);
1609 return ret;
1610}
1611
db4f2e63 1612static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1613{
be76b5b6
TM		 1614 switch (err) {
1615 default:
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1618 case 0:
1619 case -ENOENT:
1620 case -ESTALE:
1621 break;
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1629 return -EAGAIN;
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1636 return -EAGAIN;
352297b9
CL		 1637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1639 return -EAGAIN;
8ef2f8d4
CL		 1640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1642 return -EAGAIN;
be76b5b6
TM		 1643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
db4f2e63 1646 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1647 nfs_inode_find_state_and_recover(state->inode,
1648 stateid);
1649 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1650 return 0;
1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1654 ssleep(1);
1655 return -EAGAIN;
db4f2e63
TM		 1656 case -ENOMEM:
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1659 return 0;
be76b5b6 1660 }
1da177e4
LT		 1661 return err;
1662}
1663
db4f2e63
TM		 1664int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1665{
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1668 int err;
1669
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1678}
1679
be05c860
CL		 1680static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1681{
1682 struct nfs4_opendata *data = calldata;
1683
17ead6c8
TM		 1684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
be05c860
CL		 1686}
1687
cdd4e68b
TM		 1688static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1689{
1690 struct nfs4_opendata *data = calldata;
1691
17ead6c8 1692 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1693
cdd4e68b 1694 data->rpc_status = task->tk_status;
26e976a8 1695 if (data->rpc_status == 0) {
f597c537 1696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1698 renew_lease(data->o_res.server, data->timestamp);
3e309914 1699 data->rpc_done = 1;
26e976a8 1700 }
cdd4e68b
TM		 1701}
1702
1703static void nfs4_open_confirm_release(void *calldata)
1704{
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1707
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1710 goto out_free;
1711 /* In case of error, no cleanup! */
3e309914 1712 if (!data->rpc_done)
cdd4e68b 1713 goto out_free;
cdd4e68b 1714 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1715 if (!IS_ERR(state))
643168c2 1716 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1717out_free:
c6d00e63 1718 nfs4_opendata_put(data);
cdd4e68b
TM		 1719}
1720
1721static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1722 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1725};
1726
1727/*
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1729 */
1730static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1731{
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
5138fde0
TM		 1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
c970aa85
TM		 1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
5138fde0 1742 .rpc_message = &msg,
c970aa85
TM		 1743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
101070ca 1745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1746 .flags = RPC_TASK_ASYNC,
1747 };
1da177e4
LT		 1748 int status;
1749
17ead6c8 1750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1751 kref_get(&data->kref);
3e309914
TM		 1752 data->rpc_done = 0;
1753 data->rpc_status = 0;
5138fde0 1754 data->timestamp = jiffies;
c970aa85 1755 task = rpc_run_task(&task_setup_data);
7a1218a2 1756 if (IS_ERR(task))
cdd4e68b 1757 return PTR_ERR(task);
cdd4e68b
TM		 1758 status = nfs4_wait_for_completion_rpc_task(task);
1759 if (status != 0) {
1760 data->cancelled = 1;
1761 smp_wmb();
1762 } else
1763 status = data->rpc_status;
e6b3c4db 1764 rpc_put_task(task);
1da177e4
LT		 1765 return status;
1766}
1767
24ac23ab 1768static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1769{
24ac23ab
TM		 1770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
549b19cc 1772 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1773
24ac23ab 1774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1775 goto out_wait;
aac00a8d
TM		 1776 /*
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1779 */
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1782
dc0b027d 1783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1784 goto out_no_action;
aac00a8d
TM		 1785 rcu_read_lock();
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
aac00a8d
TM		 1791 rcu_read_unlock();
1792 }
95b72eb0 1793 /* Update client id. */
549b19cc 1794 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1803 }
26e976a8 1804 data->timestamp = jiffies;
035168ab 1805 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1806 &data->o_arg.seq_args,
2240a9e2
TM		 1807 &data->o_res.seq_res,
1808 task) != 0)
1809 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1810
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1819 }
6ee41268 1820 return;
652f89f6
TM		 1821unlock_no_action:
1822 rcu_read_unlock();
6ee41268
TM		 1823out_no_action:
1824 task->tk_action = NULL;
c8da19b9 1825out_wait:
b75ad4cd 1826 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1827}
1828
24ac23ab
TM		 1829static void nfs4_open_done(struct rpc_task *task, void *calldata)
1830{
1831 struct nfs4_opendata *data = calldata;
1da177e4 1832
24ac23ab 1833 data->rpc_status = task->tk_status;
d898528c 1834
14516c3a
TM		 1835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1836 return;
d898528c 1837
24ac23ab 1838 if (task->tk_status == 0) {
807d66d8
TM		 1839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1841 case S_IFREG:
1842 break;
1843 case S_IFLNK:
24ac23ab 1844 data->rpc_status = -ELOOP;
6f926b5b
TM		 1845 break;
1846 case S_IFDIR:
24ac23ab 1847 data->rpc_status = -EISDIR;
6f926b5b
TM		 1848 break;
1849 default:
24ac23ab 1850 data->rpc_status = -ENOTDIR;
807d66d8 1851 }
6f926b5b 1852 }
26e976a8 1853 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1856 }
3e309914 1857 data->rpc_done = 1;
24ac23ab 1858}
6f926b5b 1859
24ac23ab
TM		 1860static void nfs4_open_release(void *calldata)
1861{
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1864
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1867 goto out_free;
1868 /* In case of error, no cleanup! */
3e309914 1869 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1870 goto out_free;
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1873 goto out_free;
24ac23ab 1874 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1875 if (!IS_ERR(state))
643168c2 1876 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1877out_free:
c6d00e63 1878 nfs4_opendata_put(data);
24ac23ab
TM		 1879}
1880
1881static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1885};
1886
b257957e 1887static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1888{
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
5138fde0
TM		 1894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1896 .rpc_argp = o_arg,
1897 .rpc_resp = o_res,
1898 .rpc_cred = data->owner->so_cred,
1899 };
c970aa85
TM		 1900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
5138fde0 1902 .rpc_message = &msg,
c970aa85
TM		 1903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
101070ca 1905 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1906 .flags = RPC_TASK_ASYNC,
1907 };
24ac23ab
TM		 1908 int status;
1909
a9c92d6b 1910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1911 kref_get(&data->kref);
3e309914
TM		 1912 data->rpc_done = 0;
1913 data->rpc_status = 0;
2ced46c2 1914 data->cancelled = 0;
bdeca1b7
TM		 1915 data->is_recover = 0;
1916 if (isrecover) {
8fe72bac 1917 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1918 data->is_recover = 1;
1919 }
c970aa85 1920 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1921 if (IS_ERR(task))
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1924 if (status != 0) {
1925 data->cancelled = 1;
1926 smp_wmb();
1927 } else
1928 status = data->rpc_status;
1929 rpc_put_task(task);
1930
1931 return status;
1932}
1933
1934static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1935{
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1938 int status;
1939
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1942 return status;
1943
6926afd1
TM		 1944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1945
b257957e
AB		 1946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1948 if (status != 0)
1949 return status;
1950 }
1951
1952 return status;
1953}
1954
f3792d63
TM		 1955/*
1956 * Additional permission checks in order to distinguish between an
1957 * open for read, and an open for execute. This works around the
1958 * fact that NFSv4 OPEN treats read and execute permissions as being
1959 * the same.
1960 * Note that in the non-execute case, we want to turn off permission
1961 * checking if we just created a new file (POSIX open() semantics).
1962 */
6168f62c
WAA		 1963static int nfs4_opendata_access(struct rpc_cred *cred,
1964 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1965 struct nfs4_state *state, fmode_t fmode,
1966 int openflags)
6168f62c
WAA		 1967{
1968 struct nfs_access_entry cache;
1969 u32 mask;
1970
1971 /* access call failed or for some reason the server doesn't
1972 * support any access modes -- defer access call until later */
1973 if (opendata->o_res.access_supported == 0)
1974 return 0;
1975
1976 mask = 0;
f3792d63
TM		 1977 /*
1978 * Use openflags to check for exec, because fmode won't
1979 * always have FMODE_EXEC set when file open for exec.
1980 */
f8d9a897
WAA		 1981 if (openflags & __FMODE_EXEC) {
1982 /* ONLY check for exec rights */
1983 mask = MAY_EXEC;
f3792d63 1984 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1985 mask = MAY_READ;
6168f62c
WAA		 1986
1987 cache.cred = cred;
1988 cache.jiffies = jiffies;
1989 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1990 nfs_access_add_cache(state->inode, &cache);
1991
bbd3a8ee 1992 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1993 return 0;
1994
1995 /* even though OPEN succeeded, access is denied. Close the file */
1996 nfs4_close_state(state, fmode);
998f40b5 1997 return -EACCES;
6168f62c
WAA		 1998}
1999
b257957e
AB		 2000/*
2001 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2002 */
2003static int _nfs4_proc_open(struct nfs4_opendata *data)
2004{
2005 struct inode *dir = data->dir->d_inode;
2006 struct nfs_server *server = NFS_SERVER(dir);
2007 struct nfs_openargs *o_arg = &data->o_arg;
2008 struct nfs_openres *o_res = &data->o_res;
2009 int status;
2010
2011 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2012 if (!data->rpc_done)
2013 return status;
2014 if (status != 0) {
2015 if (status == -NFS4ERR_BADNAME &&
2016 !(o_arg->open_flags & O_CREAT))
2017 return -ENOENT;
24ac23ab 2018 return status;
08ef7bd3 2019 }
24ac23ab 2020
6926afd1
TM		 2021 nfs_fattr_map_and_free_names(server, &data->f_attr);
2022
5bc2afc2 2023 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2024 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2025 if (o_arg->open_flags & O_EXCL)
2026 data->file_created = 1;
2027 else if (o_res->cinfo.before != o_res->cinfo.after)
2028 data->file_created = 1;
2029 }
0df5dd4a
TM		 2030 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2031 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2032 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2033 status = _nfs4_proc_open_confirm(data);
1da177e4 2034 if (status != 0)
24ac23ab 2035 return status;
1da177e4
LT		 2036 }
2037 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2038 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2039 return 0;
1da177e4
LT		 2040}
2041
d83217c1
AA		 2042static int nfs4_recover_expired_lease(struct nfs_server *server)
2043{
2044 return nfs4_client_recover_expired_lease(server->nfs_client);
2045}
2046
1da177e4
LT		 2047/*
2048 * OPEN_EXPIRED:
2049 * reclaim state on the server after a network partition.
2050 * Assumes caller holds the appropriate lock
2051 */
539cd03a 2052static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2053{
e56e0b78 2054 struct nfs4_opendata *opendata;
864472e9 2055 int ret;
1da177e4 2056
4a1c0893 2057 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2058 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2059 if (IS_ERR(opendata))
2060 return PTR_ERR(opendata);
864472e9 2061 ret = nfs4_open_recover(opendata, state);
35d05778 2062 if (ret == -ESTALE)
3d4ff43d 2063 d_drop(ctx->dentry);
c6d00e63 2064 nfs4_opendata_put(opendata);
864472e9 2065 return ret;
1da177e4
LT		 2066}
2067
a9ed2e25 2068static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2069{
539cd03a 2070 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2071 struct nfs4_exception exception = { };
2072 int err;
2073
2074 do {
539cd03a 2075 err = _nfs4_open_expired(ctx, state);
42113a75 2076 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2077 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2078 continue;
a9ed2e25
TM		 2079 switch (err) {
2080 default:
2081 goto out;
2082 case -NFS4ERR_GRACE:
2083 case -NFS4ERR_DELAY:
2084 nfs4_handle_exception(server, err, &exception);
2085 err = 0;
2086 }
202b50dc 2087 } while (exception.retry);
a9ed2e25 2088out:
202b50dc
TM		 2089 return err;
2090}
2091
1da177e4
LT		 2092static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2093{
1da177e4 2094 struct nfs_open_context *ctx;
864472e9 2095 int ret;
1da177e4 2096
864472e9
TM		 2097 ctx = nfs4_state_find_open_context(state);
2098 if (IS_ERR(ctx))
91876b13 2099 return -EAGAIN;
539cd03a 2100 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2101 put_nfs_open_context(ctx);
2102 return ret;
1da177e4
LT		 2103}
2104
f062eb6c 2105#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2106static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2107{
f062eb6c 2108 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2109 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2110 struct nfs_delegation *delegation;
2111 struct rpc_cred *cred = NULL;
2112 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2113
2114 /* If a state reset has been done, test_stateid is unneeded */
2115 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2116 return;
2117
ab7cb0df
TM		 2118 /* Get the delegation credential for use by test/free_stateid */
2119 rcu_read_lock();
2120 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2121 if (delegation != NULL &&
2122 nfs4_stateid_match(&delegation->stateid, stateid)) {
2123 cred = get_rpccred(delegation->cred);
2124 rcu_read_unlock();
2125 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2126 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2127 } else
2128 rcu_read_unlock();
2129
3e60ffdd
CL		 2130 if (status != NFS_OK) {
2131 /* Free the stateid unless the server explicitly
2132 * informs us the stateid is unrecognized. */
2133 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2134 nfs41_free_stateid(server, stateid, cred);
6938867e 2135 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2136
6938867e
BS		 2137 write_seqlock(&state->seqlock);
2138 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2139 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2140 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2141 }
ab7cb0df
TM		 2142
2143 if (cred != NULL)
2144 put_rpccred(cred);
3e60ffdd
CL		 2145}
2146
2147/**
2148 * nfs41_check_open_stateid - possibly free an open stateid
2149 *
2150 * @state: NFSv4 state for an inode
2151 *
2152 * Returns NFS_OK if recovery for this stateid is now finished.
2153 * Otherwise a negative NFS4ERR value is returned.
2154 */
2155static int nfs41_check_open_stateid(struct nfs4_state *state)
2156{
2157 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2158 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2159 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2160 int status;
2161
2162 /* If a state reset has been done, test_stateid is unneeded */
2163 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2164 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2165 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2166 return -NFS4ERR_BAD_STATEID;
2167
ab7cb0df 2168 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2169 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2170 if (status != NFS_OK) {
2171 /* Free the stateid unless the server explicitly
2172 * informs us the stateid is unrecognized. */
2173 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2174 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2175
2176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2177 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2178 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2179 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2180 }
2181 return status;
2182}
2183
2184static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2185{
eb64cf96 2186 int status;
b01dd1d8 2187
3e60ffdd
CL		 2188 nfs41_clear_delegation_stateid(state);
2189 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2190 if (status != NFS_OK)
2191 status = nfs4_open_expired(sp, state);
2192 return status;
f062eb6c
BS		 2193}
2194#endif
2195
aa53ed54
JL		 2196/*
2197 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2198 * fields corresponding to attributes that were used to store the verifier.
2199 * Make sure we clobber those fields in the later setattr call
2200 */
2201static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2202{
2203 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2204 !(sattr->ia_valid & ATTR_ATIME_SET))
2205 sattr->ia_valid |= ATTR_ATIME;
2206
2207 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2208 !(sattr->ia_valid & ATTR_MTIME_SET))
2209 sattr->ia_valid |= ATTR_MTIME;
2210}
2211
c21443c2
TM		 2212static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2213 fmode_t fmode,
2214 int flags,
3efb9722 2215 struct nfs_open_context *ctx)
c21443c2
TM		 2216{
2217 struct nfs4_state_owner *sp = opendata->owner;
2218 struct nfs_server *server = sp->so_server;
275bb307 2219 struct dentry *dentry;
c21443c2
TM		 2220 struct nfs4_state *state;
2221 unsigned int seq;
2222 int ret;
2223
2224 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2225
2226 ret = _nfs4_proc_open(opendata);
4fa2c54b
N		 2227 if (ret != 0) {
2228 if (ret == -ENOENT) {
f39c0104
N		 2229 dentry = opendata->dentry;
2230 if (dentry->d_inode)
2231 d_delete(dentry);
2232 else if (d_unhashed(dentry))
2233 d_add(dentry, NULL);
2234
2235 nfs_set_verifier(dentry,
4fa2c54b
N		 2236 nfs_save_change_attribute(opendata->dir->d_inode));
2237 }
c21443c2 2238 goto out;
4fa2c54b 2239 }
c21443c2
TM		 2240
2241 state = nfs4_opendata_to_nfs4_state(opendata);
2242 ret = PTR_ERR(state);
2243 if (IS_ERR(state))
2244 goto out;
2245 if (server->caps & NFS_CAP_POSIX_LOCK)
2246 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2247
275bb307
TM		 2248 dentry = opendata->dentry;
2249 if (dentry->d_inode == NULL) {
2250 /* FIXME: Is this d_drop() ever needed? */
2251 d_drop(dentry);
2252 dentry = d_add_unique(dentry, igrab(state->inode));
2253 if (dentry == NULL) {
2254 dentry = opendata->dentry;
2255 } else if (dentry != ctx->dentry) {
2256 dput(ctx->dentry);
2257 ctx->dentry = dget(dentry);
2258 }
2259 nfs_set_verifier(dentry,
2260 nfs_save_change_attribute(opendata->dir->d_inode));
2261 }
2262
c21443c2
TM		 2263 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2264 if (ret != 0)
2265 goto out;
2266
3efb9722 2267 ctx->state = state;
c45ffdd2
TM		 2268 if (dentry->d_inode == state->inode) {
2269 nfs_inode_attach_open_context(ctx);
2270 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2271 nfs4_schedule_stateid_recovery(server, state);
2272 }
c21443c2
TM		 2273out:
2274 return ret;
2275}
2276
1da177e4 2277/*
24ac23ab 2278 * Returns a referenced nfs4_state
1da177e4 2279 */
82be417a 2280static int _nfs4_do_open(struct inode *dir,
4197a055 2281 struct nfs_open_context *ctx,
82be417a
AA		 2282 int flags,
2283 struct iattr *sattr,
5bc2afc2
TM		 2284 struct nfs4_label *label,
2285 int *opened)
1da177e4
LT		 2286{
2287 struct nfs4_state_owner *sp;
2288 struct nfs4_state *state = NULL;
2289 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2290 struct nfs4_opendata *opendata;
4197a055
TM		 2291 struct dentry *dentry = ctx->dentry;
2292 struct rpc_cred *cred = ctx->cred;
2293 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2294 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2295 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2296 struct nfs4_label *olabel = NULL;
aac00a8d 2297 int status;
1da177e4
LT		 2298
2299 /* Protect against reboot recovery conflicts */
1da177e4 2300 status = -ENOMEM;
d1e284d5
TM		 2301 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2302 if (sp == NULL) {
1da177e4
LT		 2303 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2304 goto out_err;
2305 }
58d9714a
TM		 2306 status = nfs4_recover_expired_lease(server);
2307 if (status != 0)
b4454fe1 2308 goto err_put_state_owner;
82a2c1b7
AV		 2309 if (dentry->d_inode != NULL)
2310 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2311 status = -ENOMEM;
49f9a0fa
TM		 2312 if (dentry->d_inode)
2313 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2314 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2315 label, claim, GFP_KERNEL);
e56e0b78 2316 if (opendata == NULL)
95d35cb4 2317 goto err_put_state_owner;
1da177e4 2318
14c43f76
DQ		 2319 if (label) {
2320 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2321 if (IS_ERR(olabel)) {
2322 status = PTR_ERR(olabel);
2323 goto err_opendata_put;
2324 }
2325 }
2326
e911b815
TM		 2327 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2328 if (!opendata->f_attr.mdsthreshold) {
2329 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2330 if (!opendata->f_attr.mdsthreshold)
2331 goto err_free_label;
2332 }
1549210f 2333 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2334 }
82a2c1b7
AV		 2335 if (dentry->d_inode != NULL)
2336 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2337
3efb9722 2338 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2339 if (status != 0)
14c43f76 2340 goto err_free_label;
3efb9722 2341 state = ctx->state;
6168f62c 2342
549b19cc
TM		 2343 if ((opendata->o_arg.open_flags & O_EXCL) &&
2344 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2345 nfs4_exclusive_attrset(opendata, sattr);
2346
2347 nfs_fattr_init(opendata->o_res.f_attr);
2348 status = nfs4_do_setattr(state->inode, cred,
2349 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2350 state, label, olabel);
2351 if (status == 0) {
0ab64e0e 2352 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2353 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2354 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2355 }
0ab64e0e 2356 }
5bc2afc2
TM		 2357 if (opendata->file_created)
2358 *opened |= FILE_CREATED;
82be417a 2359
e911b815 2360 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2361 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2362 opendata->f_attr.mdsthreshold = NULL;
2363 }
82be417a 2364
14c43f76
DQ		 2365 nfs4_label_free(olabel);
2366
c6d00e63 2367 nfs4_opendata_put(opendata);
1da177e4 2368 nfs4_put_state_owner(sp);
1da177e4 2369 return 0;
14c43f76
DQ		 2370err_free_label:
2371 nfs4_label_free(olabel);
c6d00e63
TM		 2372err_opendata_put:
2373 nfs4_opendata_put(opendata);
e56e0b78
TM		 2374err_put_state_owner:
2375 nfs4_put_state_owner(sp);
1da177e4 2376out_err:
1da177e4
LT		 2377 return status;
2378}
2379
2380
82be417a 2381static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2382 struct nfs_open_context *ctx,
82be417a
AA		 2383 int flags,
2384 struct iattr *sattr,
5bc2afc2
TM		 2385 struct nfs4_label *label,
2386 int *opened)
1da177e4 2387{
49f9a0fa 2388 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2389 struct nfs4_exception exception = { };
2390 struct nfs4_state *res;
2391 int status;
2392
2393 do {
5bc2afc2 2394 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2395 res = ctx->state;
42113a75 2396 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2397 if (status == 0)
2398 break;
2399 /* NOTE: BAD_SEQID means the server and client disagree about the
2400 * book-keeping w.r.t. state-changing operations
2401 * (OPEN/CLOSE/LOCK/LOCKU...)
2402 * It is actually a sign of a bug on the client or on the server.
2403 *
2404 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2405 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2406 * have unhashed the old state_owner for us, and that we can
2407 * therefore safely retry using a new one. We should still warn
2408 * the user though...
2409 */
2410 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2411 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2412 " returned a bad sequence-id error!\n",
2413 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2414 exception.retry = 1;
2415 continue;
2416 }
550f5747
TM		 2417 /*
2418 * BAD_STATEID on OPEN means that the server cancelled our
2419 * state before it received the OPEN_CONFIRM.
2420 * Recover by retrying the request as per the discussion
2421 * on Page 181 of RFC3530.
2422 */
2423 if (status == -NFS4ERR_BAD_STATEID) {
2424 exception.retry = 1;
2425 continue;
2426 }
aac00a8d
TM		 2427 if (status == -EAGAIN) {
2428 /* We must have found a delegation */
2429 exception.retry = 1;
2430 continue;
2431 }
49f9a0fa
TM		 2432 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2433 continue;
2434 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2435 status, &exception));
2436 } while (exception.retry);
2437 return res;
2438}
2439
659bfcd6
TM		 2440static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2441 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2442 struct nfs4_state *state, struct nfs4_label *ilabel,
2443 struct nfs4_label *olabel)
1da177e4 2444{
3e4f6290 2445 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2446 struct nfs_setattrargs arg = {
3e4f6290 2447 .fh = NFS_FH(inode),
1da177e4
LT		 2448 .iap = sattr,
2449 .server = server,
2450 .bitmask = server->attr_bitmask,
1775fd3e 2451 .label = ilabel,
1da177e4
LT		 2452 };
2453 struct nfs_setattrres res = {
2454 .fattr = fattr,
1775fd3e 2455 .label = olabel,
1da177e4
LT		 2456 .server = server,
2457 };
2458 struct rpc_message msg = {
659bfcd6
TM		 2459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2460 .rpc_argp = &arg,
2461 .rpc_resp = &res,
2462 .rpc_cred = cred,
1da177e4 2463 };
26e976a8 2464 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2465 fmode_t fmode;
2466 bool truncate;
65e4308d 2467 int status;
1da177e4 2468
aa9c2669
DQ		 2469 arg.bitmask = nfs4_bitmask(server, ilabel);
2470 if (ilabel)
2471 arg.bitmask = nfs4_bitmask(server, olabel);
2472
0e574af1 2473 nfs_fattr_init(fattr);
1da177e4 2474
ee3ae84e
TM		 2475 /* Servers should only apply open mode checks for file size changes */
2476 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2477 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2478
2479 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2480 /* Use that stateid */
0418dae1 2481 } else if (truncate && state != NULL) {
2a369153
TM		 2482 struct nfs_lockowner lockowner = {
2483 .l_owner = current->files,
2484 .l_pid = current->tgid,
2485 };
0418dae1
TM		 2486 if (!nfs4_valid_open_stateid(state))
2487 return -EBADF;
2488 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2489 &lockowner) == -EIO)
2490 return -EBADF;
08e9eac4 2491 } else
f597c537 2492 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2493
7c513058 2494 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2495 if (status == 0 && state != NULL)
2496 renew_lease(server, timestamp);
65e4308d 2497 return status;
1da177e4
LT		 2498}
2499
659bfcd6
TM		 2500static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2501 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2502 struct nfs4_state *state, struct nfs4_label *ilabel,
2503 struct nfs4_label *olabel)
1da177e4 2504{
3e4f6290 2505 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2506 struct nfs4_exception exception = {
2507 .state = state,
3114ea7a 2508 .inode = inode,
a1d0b5ee 2509 };
1da177e4
LT		 2510 int err;
2511 do {
1775fd3e 2512 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2513 trace_nfs4_setattr(inode, err);
451146be
TM		 2514 switch (err) {
2515 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2516 if (!(sattr->ia_valid & ATTR_SIZE)) {
2517 pr_warn_once("NFSv4: server %s is incorrectly "
2518 "applying open mode checks to "
2519 "a SETATTR that is not "
2520 "changing file size.\n",
2521 server->nfs_client->cl_hostname);
2522 }
451146be
TM		 2523 if (state && !(state->state & FMODE_WRITE)) {
2524 err = -EBADF;
2525 if (sattr->ia_valid & ATTR_OPEN)
2526 err = -EACCES;
2527 goto out;
2528 }
2529 }
2530 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2531 } while (exception.retry);
451146be 2532out:
1da177e4
LT		 2533 return err;
2534}
2535
2536struct nfs4_closedata {
2537 struct inode *inode;
2538 struct nfs4_state *state;
2539 struct nfs_closeargs arg;
2540 struct nfs_closeres res;
516a6af6 2541 struct nfs_fattr fattr;
26e976a8 2542 unsigned long timestamp;
f7e8917a
FI		 2543 bool roc;
2544 u32 roc_barrier;
1da177e4
LT		 2545};
2546
963d8fe5 2547static void nfs4_free_closedata(void *data)
9512135d 2548{
963d8fe5
TM		 2549 struct nfs4_closedata *calldata = data;
2550 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2551 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2552
f7e8917a
FI		 2553 if (calldata->roc)
2554 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2555 nfs4_put_open_state(calldata->state);
2556 nfs_free_seqid(calldata->arg.seqid);
9512135d 2557 nfs4_put_state_owner(sp);
322b2b90 2558 nfs_sb_deactive(sb);
9512135d
TM		 2559 kfree(calldata);
2560}
2561
963d8fe5 2562static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2563{
963d8fe5 2564 struct nfs4_closedata *calldata = data;
1da177e4 2565 struct nfs4_state *state = calldata->state;
1da177e4 2566 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2567 nfs4_stateid *res_stateid = NULL;
1da177e4 2568
a3ca5651 2569 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2570 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2571 return;
42113a75 2572 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2573 /* hmm. we are done with the inode, and in the process of freeing
2574 * the state_owner. we keep this around to process errors
2575 */
1da177e4
LT		 2576 switch (task->tk_status) {
2577 case 0:
412f6c4c
TM		 2578 res_stateid = &calldata->res.stateid;
2579 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2580 pnfs_roc_set_barrier(state->inode,
2581 calldata->roc_barrier);
26e976a8 2582 renew_lease(server, calldata->timestamp);
412f6c4c 2583 break;
69794ad7 2584 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2585 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2586 case -NFS4ERR_OLD_STATEID:
2587 case -NFS4ERR_BAD_STATEID:
1da177e4 2588 case -NFS4ERR_EXPIRED:
dc0b027d 2589 if (calldata->arg.fmode == 0)
9e33bed5 2590 break;
1da177e4 2591 default:
69794ad7 2592 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
72211dbe 2593 rpc_restart_call_prepare(task);
69794ad7
TM		 2594 goto out_release;
2595 }
1da177e4 2596 }
412f6c4c 2597 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2598out_release:
72211dbe 2599 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2600 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2601 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2602}
2603
4ce70ada 2604static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2605{
4ce70ada 2606 struct nfs4_closedata *calldata = data;
9512135d 2607 struct nfs4_state *state = calldata->state;
7fdab069 2608 struct inode *inode = calldata->inode;
aee7af35 2609 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2610 int call_close = 0;
9512135d 2611
a3ca5651 2612 dprintk("%s: begin!\n", __func__);
963d8fe5 2613 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2614 goto out_wait;
003707c7 2615
88069f77 2616 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2617 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2618 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2619 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2620 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2621 /* Calculate the current open share mode */
2622 calldata->arg.fmode = 0;
2623 if (is_rdonly || is_rdwr)
2624 calldata->arg.fmode |= FMODE_READ;
2625 if (is_wronly || is_rdwr)
2626 calldata->arg.fmode |= FMODE_WRITE;
003707c7 2627 /* Calculate the change in open mode */
e7616923 2628 if (state->n_rdwr == 0) {
003707c7 2629 if (state->n_rdonly == 0) {
aee7af35 2630 call_close |= is_rdonly || is_rdwr;
88069f77 2631 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2632 }
2633 if (state->n_wronly == 0) {
aee7af35 2634 call_close |= is_wronly || is_rdwr;
88069f77 2635 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2636 }
e7616923 2637 }
5d422301
TM		 2638 if (!nfs4_valid_open_stateid(state))
2639 call_close = 0;
4cecb76f 2640 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2641
2642 if (!call_close) {
963d8fe5 2643 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2644 goto out_no_action;
9512135d 2645 }
88069f77 2646
f7e8917a 2647 if (calldata->arg.fmode == 0) {
88069f77 2648 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2649 if (calldata->roc &&
b9536ad5
AA		 2650 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2651 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2652 goto out_wait;
b9536ad5 2653 }
f7e8917a 2654 }
88069f77 2655
516a6af6 2656 nfs_fattr_init(calldata->res.fattr);
26e976a8 2657 calldata->timestamp = jiffies;
7fdab069 2658 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2659 &calldata->arg.seq_args,
2660 &calldata->res.seq_res,
2240a9e2
TM		 2661 task) != 0)
2662 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2663 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2664 return;
2665out_no_action:
2666 task->tk_action = NULL;
2667out_wait:
2668 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2669}
2670
963d8fe5 2671static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2672 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2673 .rpc_call_done = nfs4_close_done,
2674 .rpc_release = nfs4_free_closedata,
2675};
2676
fe08c546
PT		 2677static bool nfs4_state_has_opener(struct nfs4_state *state)
2678{
2679 /* first check existing openers */
2680 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2681 state->n_rdonly != 0)
2682 return true;
2683
2684 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2685 state->n_wronly != 0)
2686 return true;
2687
2688 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2689 state->n_rdwr != 0)
2690 return true;
2691
2692 return false;
2693}
2694
2695static bool nfs4_roc(struct inode *inode)
2696{
2697 struct nfs_inode *nfsi = NFS_I(inode);
2698 struct nfs_open_context *ctx;
2699 struct nfs4_state *state;
2700
2701 spin_lock(&inode->i_lock);
2702 list_for_each_entry(ctx, &nfsi->open_files, list) {
2703 state = ctx->state;
2704 if (state == NULL)
2705 continue;
2706 if (nfs4_state_has_opener(state)) {
2707 spin_unlock(&inode->i_lock);
2708 return false;
2709 }
2710 }
2711 spin_unlock(&inode->i_lock);
2712
2713 if (nfs4_check_delegation(inode, FMODE_READ))
2714 return false;
2715
2716 return pnfs_roc(inode);
2717}
2718
1da177e4
LT		 2719/*
2720 * It is possible for data to be read/written from a mem-mapped file
2721 * after the sys_close call (which hits the vfs layer as a flush).
2722 * This means that we can't safely call nfsv4 close on a file until
2723 * the inode is cleared. This in turn means that we are not good
2724 * NFSv4 citizens - we do not indicate to the server to update the file's
2725 * share state even when we are done with one of the three share
2726 * stateid's in the inode.
2727 *
2728 * NOTE: Caller must be holding the sp->so_owner semaphore!
2729 */
1f7977c1 2730int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2731{
4a35bd41 2732 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2733 struct nfs4_closedata *calldata;
b39e625b
TM		 2734 struct nfs4_state_owner *sp = state->owner;
2735 struct rpc_task *task;
5138fde0
TM		 2736 struct rpc_message msg = {
2737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2738 .rpc_cred = state->owner->so_cred,
2739 };
c970aa85
TM		 2740 struct rpc_task_setup task_setup_data = {
2741 .rpc_client = server->client,
5138fde0 2742 .rpc_message = &msg,
c970aa85 2743 .callback_ops = &nfs4_close_ops,
101070ca 2744 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2745 .flags = RPC_TASK_ASYNC,
2746 };
9512135d 2747 int status = -ENOMEM;
1da177e4 2748
fa940720
WAA		 2749 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2750 &task_setup_data.rpc_client, &msg);
2751
8535b2be 2752 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2753 if (calldata == NULL)
9512135d 2754 goto out;
a9c92d6b 2755 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2756 calldata->inode = state->inode;
1da177e4 2757 calldata->state = state;
4a35bd41 2758 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2759 calldata->arg.stateid = &state->open_stateid;
1da177e4 2760 /* Serialization for the sequence id */
8535b2be 2761 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2762 if (calldata->arg.seqid == NULL)
2763 goto out_free_calldata;
dc0b027d 2764 calldata->arg.fmode = 0;
a65318bf 2765 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2766 calldata->res.fattr = &calldata->fattr;
c1d51931 2767 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2768 calldata->res.server = server;
fe08c546 2769 calldata->roc = nfs4_roc(state->inode);
643168c2 2770 nfs_sb_active(calldata->inode->i_sb);
9512135d 2771
1174dd1f
TM		 2772 msg.rpc_argp = &calldata->arg;
2773 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2774 task_setup_data.callback_data = calldata;
2775 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2776 if (IS_ERR(task))
2777 return PTR_ERR(task);
a49c3c77
TM		 2778 status = 0;
2779 if (wait)
2780 status = rpc_wait_for_completion_task(task);
b39e625b 2781 rpc_put_task(task);
a49c3c77 2782 return status;
9512135d
TM		 2783out_free_calldata:
2784 kfree(calldata);
2785out:
b39e625b
TM		 2786 nfs4_put_open_state(state);
2787 nfs4_put_state_owner(sp);
9512135d 2788 return status;
1da177e4
LT		 2789}
2790
2b484297 2791static struct inode *
5bc2afc2
TM		 2792nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2793 int open_flags, struct iattr *attr, int *opened)
1da177e4 2794{
1da177e4 2795 struct nfs4_state *state;
aa9c2669
DQ		 2796 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2797
2798 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2799
565277f6 2800 /* Protect against concurrent sillydeletes */
5bc2afc2 2801 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2802
2803 nfs4_label_release_security(label);
2804
f46e0bd3
TM		 2805 if (IS_ERR(state))
2806 return ERR_CAST(state);
275bb307 2807 return state->inode;
1da177e4
LT		 2808}
2809
1185a552 2810static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2811{
2812 if (ctx->state == NULL)
2813 return;
2814 if (is_sync)
643168c2 2815 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2816 else
643168c2 2817 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2818}
1da177e4 2819
b944dba3
TM		 2820#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2821#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2822#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2823
1da177e4
LT		 2824static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2825{
43652ad5
BH		 2826 struct nfs4_server_caps_arg args = {
2827 .fhandle = fhandle,
2828 };
1da177e4
LT		 2829 struct nfs4_server_caps_res res = {};
2830 struct rpc_message msg = {
2831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2832 .rpc_argp = &args,
1da177e4
LT		 2833 .rpc_resp = &res,
2834 };
2835 int status;
2836
7c513058 2837 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2838 if (status == 0) {
b944dba3
TM		 2839 /* Sanity check the server answers */
2840 switch (server->nfs_client->cl_minorversion) {
2841 case 0:
2842 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2843 res.attr_bitmask[2] = 0;
2844 break;
2845 case 1:
2846 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2847 break;
2848 case 2:
2849 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2850 }
1da177e4 2851 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2852 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2853 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2854 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2855 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2856 NFS_CAP_CTIME|NFS_CAP_MTIME|
2857 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2858 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2859 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2860 server->caps |= NFS_CAP_ACLS;
2861 if (res.has_links != 0)
2862 server->caps |= NFS_CAP_HARDLINKS;
2863 if (res.has_symlinks != 0)
2864 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2865 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2866 server->caps |= NFS_CAP_FILEID;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2868 server->caps |= NFS_CAP_MODE;
2869 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2870 server->caps |= NFS_CAP_NLINK;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2872 server->caps |= NFS_CAP_OWNER;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2874 server->caps |= NFS_CAP_OWNER_GROUP;
2875 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2876 server->caps |= NFS_CAP_ATIME;
2877 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2878 server->caps |= NFS_CAP_CTIME;
2879 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2880 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2881#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2882 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2883 server->caps |= NFS_CAP_SECURITY_LABEL;
2884#endif
2885 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2886 sizeof(server->attr_bitmask));
b944dba3 2887 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2888
a65318bf
TM		 2889 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2890 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2891 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2892 server->cache_consistency_bitmask[2] = 0;
1da177e4 2893 server->acl_bitmask = res.acl_bitmask;
264e6351 2894 server->fh_expire_type = res.fh_expire_type;
1da177e4 2895 }
cccef3b9 2896
1da177e4
LT		 2897 return status;
2898}
2899
55a97593 2900int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2901{
2902 struct nfs4_exception exception = { };
2903 int err;
2904 do {
2905 err = nfs4_handle_exception(server,
2906 _nfs4_server_capabilities(server, fhandle),
2907 &exception);
2908 } while (exception.retry);
2909 return err;
2910}
2911
2912static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2913 struct nfs_fsinfo *info)
2914{
aa9c2669 2915 u32 bitmask[3];
1da177e4 2916 struct nfs4_lookup_root_arg args = {
aa9c2669 2917 .bitmask = bitmask,
1da177e4
LT		 2918 };
2919 struct nfs4_lookup_res res = {
2920 .server = server,
0e574af1 2921 .fattr = info->fattr,
1da177e4
LT		 2922 .fh = fhandle,
2923 };
2924 struct rpc_message msg = {
2925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2926 .rpc_argp = &args,
2927 .rpc_resp = &res,
2928 };
008f55d0 2929
aa9c2669
DQ		 2930 bitmask[0] = nfs4_fattr_bitmap[0];
2931 bitmask[1] = nfs4_fattr_bitmap[1];
2932 /*
2933 * Process the label in the upcoming getfattr
2934 */
2935 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2936
0e574af1 2937 nfs_fattr_init(info->fattr);
7c513058 2938 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2939}
2940
2941static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2942 struct nfs_fsinfo *info)
2943{
2944 struct nfs4_exception exception = { };
2945 int err;
2946 do {
fb8a5ba8 2947 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2948 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2949 switch (err) {
2950 case 0:
2951 case -NFS4ERR_WRONGSEC:
05e9cfb4 2952 goto out;
fb8a5ba8
BS		 2953 default:
2954 err = nfs4_handle_exception(server, err, &exception);
2955 }
1da177e4 2956 } while (exception.retry);
05e9cfb4 2957out:
1da177e4
LT		 2958 return err;
2959}
2960
8f70e95f
BS		 2961static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2962 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2963{
c2190661
TM		 2964 struct rpc_auth_create_args auth_args = {
2965 .pseudoflavor = flavor,
2966 };
8f70e95f
BS		 2967 struct rpc_auth *auth;
2968 int ret;
2969
c2190661 2970 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2971 if (IS_ERR(auth)) {
75bc8821 2972 ret = -EACCES;
8f70e95f
BS		 2973 goto out;
2974 }
2975 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2976out:
2977 return ret;
2978}
2979
9a744ba3
CL		 2980/*
2981 * Retry pseudoroot lookup with various security flavors. We do this when:
2982 *
2983 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2984 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2985 *
2986 * Returns zero on success, or a negative NFS4ERR value, or a
2987 * negative errno value.
2988 */
801a16dc 2989static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2990 struct nfs_fsinfo *info)
1da177e4 2991{
9a744ba3
CL		 2992 /* Per 3530bis 15.33.5 */
2993 static const rpc_authflavor_t flav_array[] = {
2994 RPC_AUTH_GSS_KRB5P,
2995 RPC_AUTH_GSS_KRB5I,
2996 RPC_AUTH_GSS_KRB5,
c4eafe11 2997 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2998 RPC_AUTH_NULL,
2999 };
3000 int status = -EPERM;
3001 size_t i;
6a1a1e34 3002
4d4b69dd
WAA		 3003 if (server->auth_info.flavor_len > 0) {
3004 /* try each flavor specified by user */
3005 for (i = 0; i < server->auth_info.flavor_len; i++) {
3006 status = nfs4_lookup_root_sec(server, fhandle, info,
3007 server->auth_info.flavors[i]);
3008 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3009 continue;
3010 break;
3011 }
3012 } else {
3013 /* no flavors specified by user, try default list */
3014 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3015 status = nfs4_lookup_root_sec(server, fhandle, info,
3016 flav_array[i]);
3017 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3018 continue;
3019 break;
3020 }
8f70e95f 3021 }
9a744ba3 3022
fb8a5ba8
BS		 3023 /*
3024 * -EACCESS could mean that the user doesn't have correct permissions
3025 * to access the mount. It could also mean that we tried to mount
3026 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3027 * existing mount programs don't handle -EACCES very well so it should
3028 * be mapped to -EPERM instead.
3029 */
3030 if (status == -EACCES)
3031 status = -EPERM;
801a16dc
BS		 3032 return status;
3033}
3034
2ed4b95b
CL		 3035static int nfs4_do_find_root_sec(struct nfs_server *server,
3036 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3037{
3038 int mv = server->nfs_client->cl_minorversion;
3039 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3040}
3041
3042/**
3043 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3044 * @server: initialized nfs_server handle
3045 * @fhandle: we fill in the pseudo-fs root file handle
3046 * @info: we fill in an FSINFO struct
5e6b1990 3047 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3048 *
3049 * Returns zero on success, or a negative errno.
801a16dc 3050 */
3028eb2b 3051int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3052 struct nfs_fsinfo *info,
3053 bool auth_probe)
801a16dc 3054{
2ed4b95b
CL		 3055 int status;
3056
5e6b1990
TM		 3057 switch (auth_probe) {
3058 case false:
3059 status = nfs4_lookup_root(server, fhandle, info);
3060 if (status != -NFS4ERR_WRONGSEC)
3061 break;
5e6b1990 3062 default:
2ed4b95b 3063 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3064 }
2ed4b95b 3065
1da177e4
LT		 3066 if (status == 0)
3067 status = nfs4_server_capabilities(server, fhandle);
3068 if (status == 0)
3069 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3070
c12e87f4 3071 return nfs4_map_errors(status);
1da177e4
LT		 3072}
3073
bae36241
BS		 3074static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3075 struct nfs_fsinfo *info)
3076{
3077 int error;
3078 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3079 struct nfs4_label *label = NULL;
bae36241
BS		 3080
3081 error = nfs4_server_capabilities(server, mntfh);
3082 if (error < 0) {
3083 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3084 return error;
3085 }
3086
14c43f76
DQ		 3087 label = nfs4_label_alloc(server, GFP_KERNEL);
3088 if (IS_ERR(label))
3089 return PTR_ERR(label);
3090
1775fd3e 3091 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3092 if (error < 0) {
3093 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3094 goto err_free_label;
bae36241
BS		 3095 }
3096
3097 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3098 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3099 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3100
14c43f76
DQ		 3101err_free_label:
3102 nfs4_label_free(label);
3103
bae36241
BS		 3104 return error;
3105}
3106
6b97fd3d
MN		 3107/*
3108 * Get locations and (maybe) other attributes of a referral.
3109 * Note that we'll actually follow the referral later when
3110 * we detect fsid mismatch in inode revalidation
3111 */
f05d147f
BS		 3112static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3113 const struct qstr *name, struct nfs_fattr *fattr,
3114 struct nfs_fh *fhandle)
6b97fd3d
MN		 3115{
3116 int status = -ENOMEM;
3117 struct page *page = NULL;
3118 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3119
3120 page = alloc_page(GFP_KERNEL);
3121 if (page == NULL)
3122 goto out;
3123 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3124 if (locations == NULL)
3125 goto out;
3126
f05d147f 3127 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3128 if (status != 0)
3129 goto out;
519ae255
CL		 3130
3131 /*
3132 * If the fsid didn't change, this is a migration event, not a
3133 * referral. Cause us to drop into the exception handler, which
3134 * will kick off migration recovery.
3135 */
6b97fd3d 3136 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3137 dprintk("%s: server did not return a different fsid for"
3138 " a referral at %s\n", __func__, name->name);
519ae255 3139 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3140 goto out;
3141 }
533eb461
AA		 3142 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3143 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3144
533eb461 3145 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3146 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3147 memset(fhandle, 0, sizeof(struct nfs_fh));
3148out:
3149 if (page)
3150 __free_page(page);
5d7ca35a 3151 kfree(locations);
6b97fd3d
MN		 3152 return status;
3153}
3154
1775fd3e
DQ		 3155static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3156 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3157{
3158 struct nfs4_getattr_arg args = {
3159 .fh = fhandle,
3160 .bitmask = server->attr_bitmask,
3161 };
3162 struct nfs4_getattr_res res = {
3163 .fattr = fattr,
1775fd3e 3164 .label = label,
1da177e4
LT		 3165 .server = server,
3166 };
3167 struct rpc_message msg = {
3168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3169 .rpc_argp = &args,
3170 .rpc_resp = &res,
3171 };
aa9c2669
DQ		 3172
3173 args.bitmask = nfs4_bitmask(server, label);
3174
0e574af1 3175 nfs_fattr_init(fattr);
7c513058 3176 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3177}
3178
1775fd3e
DQ		 3179static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3180 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3181{
3182 struct nfs4_exception exception = { };
3183 int err;
3184 do {
b5f875a9
TM		 3185 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3186 trace_nfs4_getattr(server, fhandle, fattr, err);
3187 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3188 &exception);
3189 } while (exception.retry);
3190 return err;
3191}
3192
3193/*
3194 * The file is not closed if it is opened due to the a request to change
3195 * the size of the file. The open call will not be needed once the
3196 * VFS layer lookup-intents are implemented.
3197 *
3198 * Close is called when the inode is destroyed.
3199 * If we haven't opened the file for O_WRONLY, we
3200 * need to in the size_change case to obtain a stateid.
3201 *
3202 * Got race?
3203 * Because OPEN is always done by name in nfsv4, it is
3204 * possible that we opened a different file by the same
3205 * name. We can recognize this race condition, but we
3206 * can't do anything about it besides returning an error.
3207 *
3208 * This will be fixed with VFS changes (lookup-intent).
3209 */
3210static int
3211nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3212 struct iattr *sattr)
3213{
08e9eac4 3214 struct inode *inode = dentry->d_inode;
659bfcd6 3215 struct rpc_cred *cred = NULL;
d530838b 3216 struct nfs4_state *state = NULL;
14c43f76 3217 struct nfs4_label *label = NULL;
1da177e4
LT		 3218 int status;
3219
8a1636c4 3220 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3221 pnfs_commit_and_return_layout(inode);
8a1636c4 3222
0e574af1 3223 nfs_fattr_init(fattr);
1da177e4 3224
2669940d
AA		 3225 /* Deal with open(O_TRUNC) */
3226 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3227 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3228
3229 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3230 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3231 return 0;
3232
d530838b 3233 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3234 if (sattr->ia_valid & ATTR_FILE) {
3235 struct nfs_open_context *ctx;
3236
3237 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3238 if (ctx) {
3239 cred = ctx->cred;
3240 state = ctx->state;
3241 }
659bfcd6 3242 }
08e9eac4 3243
14c43f76
DQ		 3244 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3245 if (IS_ERR(label))
3246 return PTR_ERR(label);
3247
3248 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3249 if (status == 0) {
65e4308d 3250 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3251 nfs_setsecurity(inode, fattr, label);
3252 }
14c43f76 3253 nfs4_label_free(label);
1da177e4
LT		 3254 return status;
3255}
3256
0c2e53f1
TM		 3257static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3258 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3259 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3260{
0c2e53f1 3261 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3262 int status;
3263 struct nfs4_lookup_arg args = {
3264 .bitmask = server->attr_bitmask,
0c2e53f1 3265 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3266 .name = name,
3267 };
3268 struct nfs4_lookup_res res = {
3269 .server = server,
3270 .fattr = fattr,
aa9c2669 3271 .label = label,
2b3de441
DH		 3272 .fh = fhandle,
3273 };
3274 struct rpc_message msg = {
3275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3276 .rpc_argp = &args,
3277 .rpc_resp = &res,
3278 };
3279
aa9c2669
DQ		 3280 args.bitmask = nfs4_bitmask(server, label);
3281
2b3de441
DH		 3282 nfs_fattr_init(fattr);
3283
1da177e4 3284 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3285 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3286 dprintk("NFS reply lookup: %d\n", status);
3287 return status;
3288}
3289
72de53ec 3290static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3291{
7ebb9315 3292 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3293 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3294 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3295 fattr->nlink = 2;
3296}
3297
72de53ec
BS		 3298static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3299 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3300 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3301{
3302 struct nfs4_exception exception = { };
72de53ec 3303 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3304 int err;
3305 do {
1775fd3e 3306 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3307 trace_nfs4_lookup(dir, name, err);
72de53ec 3308 switch (err) {
08ef7bd3 3309 case -NFS4ERR_BADNAME:
72de53ec
BS		 3310 err = -ENOENT;
3311 goto out;
0c2e53f1 3312 case -NFS4ERR_MOVED:
f05d147f 3313 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3314 goto out;
0c2e53f1 3315 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3316 err = -EPERM;
3317 if (client != *clnt)
3318 goto out;
66b06860 3319 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3320 if (IS_ERR(client))
3321 return PTR_ERR(client);
3322
3323 exception.retry = 1;
3324 break;
3325 default:
3326 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3327 }
1da177e4 3328 } while (exception.retry);
72de53ec
BS		 3329
3330out:
3331 if (err == 0)
3332 *clnt = client;
3333 else if (client != *clnt)
3334 rpc_shutdown_client(client);
3335
1da177e4
LT		 3336 return err;
3337}
3338
80a16b21 3339static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3340 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3341 struct nfs4_label *label)
72de53ec
BS		 3342{
3343 int status;
3344 struct rpc_clnt *client = NFS_CLIENT(dir);
3345
1775fd3e 3346 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3347 if (client != NFS_CLIENT(dir)) {
3348 rpc_shutdown_client(client);
3349 nfs_fixup_secinfo_attributes(fattr);
3350 }
3351 return status;
3352}
3353
f05d147f
BS		 3354struct rpc_clnt *
3355nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3356 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3357{
b72888cb 3358 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3359 int status;
f05d147f 3360
1775fd3e 3361 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3362 if (status < 0)
f05d147f 3363 return ERR_PTR(status);
b72888cb 3364 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3365}
3366
1da177e4
LT		 3367static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3368{
76b32999 3369 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3370 struct nfs4_accessargs args = {
3371 .fh = NFS_FH(inode),
a4980e78 3372 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3373 };
3374 struct nfs4_accessres res = {
3375 .server = server,
1da177e4 3376 };
1da177e4
LT		 3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3379 .rpc_argp = &args,
3380 .rpc_resp = &res,
3381 .rpc_cred = entry->cred,
3382 };
3383 int mode = entry->mask;
aa9c2669 3384 int status = 0;
1da177e4
LT		 3385
3386 /*
3387 * Determine which access bits we want to ask for...
3388 */
3389 if (mode & MAY_READ)
3390 args.access |= NFS4_ACCESS_READ;
3391 if (S_ISDIR(inode->i_mode)) {
3392 if (mode & MAY_WRITE)
3393 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3394 if (mode & MAY_EXEC)
3395 args.access |= NFS4_ACCESS_LOOKUP;
3396 } else {
3397 if (mode & MAY_WRITE)
3398 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3399 if (mode & MAY_EXEC)
3400 args.access |= NFS4_ACCESS_EXECUTE;
3401 }
c407d41a
TM		 3402
3403 res.fattr = nfs_alloc_fattr();
3404 if (res.fattr == NULL)
3405 return -ENOMEM;
3406
7c513058 3407 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3408 if (!status) {
6168f62c 3409 nfs_access_set_mask(entry, res.access);
c407d41a 3410 nfs_refresh_inode(inode, res.fattr);
1da177e4 3411 }
c407d41a 3412 nfs_free_fattr(res.fattr);
1da177e4
LT		 3413 return status;
3414}
3415
3416static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3417{
3418 struct nfs4_exception exception = { };
3419 int err;
3420 do {
c1578b76
TM		 3421 err = _nfs4_proc_access(inode, entry);
3422 trace_nfs4_access(inode, err);
3423 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3424 &exception);
3425 } while (exception.retry);
3426 return err;
3427}
3428
3429/*
3430 * TODO: For the time being, we don't try to get any attributes
3431 * along with any of the zero-copy operations READ, READDIR,
3432 * READLINK, WRITE.
3433 *
3434 * In the case of the first three, we want to put the GETATTR
3435 * after the read-type operation -- this is because it is hard
3436 * to predict the length of a GETATTR response in v4, and thus
3437 * align the READ data correctly. This means that the GETATTR
3438 * may end up partially falling into the page cache, and we should
3439 * shift it into the 'tail' of the xdr_buf before processing.
3440 * To do this efficiently, we need to know the total length
3441 * of data received, which doesn't seem to be available outside
3442 * of the RPC layer.
3443 *
3444 * In the case of WRITE, we also want to put the GETATTR after
3445 * the operation -- in this case because we want to make sure
140150db 3446 * we get the post-operation mtime and size.
1da177e4
LT		 3447 *
3448 * Both of these changes to the XDR layer would in fact be quite
3449 * minor, but I decided to leave them for a subsequent patch.
3450 */
3451static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3452 unsigned int pgbase, unsigned int pglen)
3453{
3454 struct nfs4_readlink args = {
3455 .fh = NFS_FH(inode),
3456 .pgbase = pgbase,
3457 .pglen = pglen,
3458 .pages = &page,
3459 };
f50c7000 3460 struct nfs4_readlink_res res;
1da177e4
LT		 3461 struct rpc_message msg = {
3462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3463 .rpc_argp = &args,
f50c7000 3464 .rpc_resp = &res,
1da177e4
LT		 3465 };
3466
7c513058 3467 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3468}
3469
3470static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3471 unsigned int pgbase, unsigned int pglen)
3472{
3473 struct nfs4_exception exception = { };
3474 int err;
3475 do {
c1578b76
TM		 3476 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3477 trace_nfs4_readlink(inode, err);
3478 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3479 &exception);
3480 } while (exception.retry);
3481 return err;
3482}
3483
1da177e4 3484/*
8867fe58 3485 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3486 */
1da177e4
LT		 3487static int
3488nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3489 int flags)
1da177e4 3490{
aa9c2669 3491 struct nfs4_label l, *ilabel = NULL;
8867fe58 3492 struct nfs_open_context *ctx;
1da177e4 3493 struct nfs4_state *state;
5bc2afc2 3494 int opened = 0;
1da177e4
LT		 3495 int status = 0;
3496
8867fe58
MS		 3497 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3498 if (IS_ERR(ctx))
3499 return PTR_ERR(ctx);
3500
aa9c2669
DQ		 3501 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3502
a8a5da99 3503 sattr->ia_mode &= ~current_umask();
5bc2afc2 3504 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3505 if (IS_ERR(state)) {
3506 status = PTR_ERR(state);
c0204fd2 3507 goto out;
1da177e4 3508 }
1da177e4 3509out:
aa9c2669 3510 nfs4_label_release_security(ilabel);
8867fe58 3511 put_nfs_open_context(ctx);
1da177e4
LT		 3512 return status;
3513}
3514
3515static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3516{
16e42959 3517 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3518 struct nfs_removeargs args = {
1da177e4 3519 .fh = NFS_FH(dir),
26fe5750 3520 .name = *name,
16e42959 3521 };
4fdc17b2 3522 struct nfs_removeres res = {
16e42959 3523 .server = server,
1da177e4 3524 };
1da177e4 3525 struct rpc_message msg = {
4fdc17b2
TM		 3526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3527 .rpc_argp = &args,
3528 .rpc_resp = &res,
1da177e4 3529 };
778d2817 3530 int status;
1da177e4 3531
7c513058 3532 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3533 if (status == 0)
16e42959 3534 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3535 return status;
3536}
3537
3538static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3539{
3540 struct nfs4_exception exception = { };
3541 int err;
3542 do {
078ea3df
TM		 3543 err = _nfs4_proc_remove(dir, name);
3544 trace_nfs4_remove(dir, name, err);
3545 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3546 &exception);
3547 } while (exception.retry);
3548 return err;
3549}
3550
e4eff1a6 3551static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3552{
e4eff1a6
TM		 3553 struct nfs_server *server = NFS_SERVER(dir);
3554 struct nfs_removeargs *args = msg->rpc_argp;
3555 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3556
e4eff1a6 3557 res->server = server;
1da177e4 3558 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3559 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3560
3561 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3562}
3563
34e137cc
BS		 3564static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3565{
d9afbd1b
TM		 3566 nfs4_setup_sequence(NFS_SERVER(data->dir),
3567 &data->args.seq_args,
3568 &data->res.seq_res,
3569 task);
1da177e4
LT		 3570}
3571
e4eff1a6 3572static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3573{
078ea3df
TM		 3574 struct nfs_unlinkdata *data = task->tk_calldata;
3575 struct nfs_removeres *res = &data->res;
e4eff1a6 3576
14516c3a
TM		 3577 if (!nfs4_sequence_done(task, &res->seq_res))
3578 return 0;
9e33bed5 3579 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3580 return 0;
3581 update_changeattr(dir, &res->cinfo);
e4eff1a6 3582 return 1;
1da177e4
LT		 3583}
3584
d3d4152a
JL		 3585static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3586{
3587 struct nfs_server *server = NFS_SERVER(dir);
3588 struct nfs_renameargs *arg = msg->rpc_argp;
3589 struct nfs_renameres *res = msg->rpc_resp;
3590
3591 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3592 res->server = server;
a9c92d6b 3593 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3594}
3595
c6bfa1a1
BS		 3596static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3597{
d9afbd1b
TM		 3598 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3599 &data->args.seq_args,
3600 &data->res.seq_res,
3601 task);
d3d4152a
JL		 3602}
3603
3604static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3605 struct inode *new_dir)
3606{
fbc6f7c2
TM		 3607 struct nfs_renamedata *data = task->tk_calldata;
3608 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3609
3610 if (!nfs4_sequence_done(task, &res->seq_res))
3611 return 0;
3612 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3613 return 0;
3614
3615 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3616 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3617 return 1;
3618}
3619
1da177e4
LT		 3620static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3621{
91ba2eee 3622 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3623 struct nfs4_link_arg arg = {
3624 .fh = NFS_FH(inode),
3625 .dir_fh = NFS_FH(dir),
3626 .name = name,
91ba2eee
TM		 3627 .bitmask = server->attr_bitmask,
3628 };
91ba2eee
TM		 3629 struct nfs4_link_res res = {
3630 .server = server,
1775fd3e 3631 .label = NULL,
1da177e4 3632 };
1da177e4
LT		 3633 struct rpc_message msg = {
3634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3635 .rpc_argp = &arg,
91ba2eee 3636 .rpc_resp = &res,
1da177e4 3637 };
136f2627
TM		 3638 int status = -ENOMEM;
3639
3640 res.fattr = nfs_alloc_fattr();
778d2817 3641 if (res.fattr == NULL)
136f2627 3642 goto out;
1da177e4 3643
14c43f76
DQ		 3644 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3645 if (IS_ERR(res.label)) {
3646 status = PTR_ERR(res.label);
3647 goto out;
3648 }
aa9c2669 3649 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3650
7c513058 3651 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3652 if (!status) {
3653 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3654 status = nfs_post_op_update_inode(inode, res.fattr);
3655 if (!status)
3656 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3657 }
14c43f76
DQ		 3658
3659
3660 nfs4_label_free(res.label);
3661
136f2627 3662out:
136f2627 3663 nfs_free_fattr(res.fattr);
1da177e4
LT		 3664 return status;
3665}
3666
3667static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3668{
3669 struct nfs4_exception exception = { };
3670 int err;
3671 do {
3672 err = nfs4_handle_exception(NFS_SERVER(inode),
3673 _nfs4_proc_link(inode, dir, name),
3674 &exception);
3675 } while (exception.retry);
3676 return err;
3677}
3678
57dc9a57
TM		 3679struct nfs4_createdata {
3680 struct rpc_message msg;
3681 struct nfs4_create_arg arg;
3682 struct nfs4_create_res res;
3683 struct nfs_fh fh;
3684 struct nfs_fattr fattr;
1775fd3e 3685 struct nfs4_label *label;
57dc9a57
TM		 3686};
3687
3688static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3689 struct qstr *name, struct iattr *sattr, u32 ftype)
3690{
3691 struct nfs4_createdata *data;
3692
3693 data = kzalloc(sizeof(*data), GFP_KERNEL);
3694 if (data != NULL) {
3695 struct nfs_server *server = NFS_SERVER(dir);
3696
14c43f76
DQ		 3697 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3698 if (IS_ERR(data->label))
3699 goto out_free;
3700
57dc9a57
TM		 3701 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3702 data->msg.rpc_argp = &data->arg;
3703 data->msg.rpc_resp = &data->res;
3704 data->arg.dir_fh = NFS_FH(dir);
3705 data->arg.server = server;
3706 data->arg.name = name;
3707 data->arg.attrs = sattr;
3708 data->arg.ftype = ftype;
aa9c2669 3709 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3710 data->res.server = server;
3711 data->res.fh = &data->fh;
3712 data->res.fattr = &data->fattr;
1775fd3e 3713 data->res.label = data->label;
57dc9a57 3714 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3715 }
3716 return data;
14c43f76
DQ		 3717out_free:
3718 kfree(data);
3719 return NULL;
57dc9a57
TM		 3720}
3721
3722static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3723{
7c513058 3724 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3725 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3726 if (status == 0) {
3727 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3728 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3729 }
3730 return status;
3731}
3732
3733static void nfs4_free_createdata(struct nfs4_createdata *data)
3734{
14c43f76 3735 nfs4_label_free(data->label);
57dc9a57
TM		 3736 kfree(data);
3737}
3738
4f390c15 3739static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3740 struct page *page, unsigned int len, struct iattr *sattr,
3741 struct nfs4_label *label)
1da177e4 3742{
57dc9a57
TM		 3743 struct nfs4_createdata *data;
3744 int status = -ENAMETOOLONG;
1da177e4 3745
94a6d753 3746 if (len > NFS4_MAXPATHLEN)
57dc9a57 3747 goto out;
4f390c15 3748
57dc9a57
TM		 3749 status = -ENOMEM;
3750 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3751 if (data == NULL)
3752 goto out;
3753
3754 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3755 data->arg.u.symlink.pages = &page;
3756 data->arg.u.symlink.len = len;
1775fd3e 3757 data->arg.label = label;
1da177e4 3758
57dc9a57
TM		 3759 status = nfs4_do_create(dir, dentry, data);
3760
3761 nfs4_free_createdata(data);
3762out:
1da177e4
LT		 3763 return status;
3764}
3765
4f390c15 3766static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3767 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3768{
3769 struct nfs4_exception exception = { };
aa9c2669 3770 struct nfs4_label l, *label = NULL;
1da177e4 3771 int err;
aa9c2669
DQ		 3772
3773 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3774
1da177e4 3775 do {
078ea3df
TM		 3776 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3777 trace_nfs4_symlink(dir, &dentry->d_name, err);
3778 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3779 &exception);
3780 } while (exception.retry);
aa9c2669
DQ		 3781
3782 nfs4_label_release_security(label);
1da177e4
LT		 3783 return err;
3784}
3785
3786static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3787 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3788{
57dc9a57
TM		 3789 struct nfs4_createdata *data;
3790 int status = -ENOMEM;
1da177e4 3791
57dc9a57
TM		 3792 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3793 if (data == NULL)
3794 goto out;
3795
1775fd3e 3796 data->arg.label = label;
57dc9a57
TM		 3797 status = nfs4_do_create(dir, dentry, data);
3798
3799 nfs4_free_createdata(data);
3800out:
1da177e4
LT		 3801 return status;
3802}
3803
3804static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3805 struct iattr *sattr)
3806{
3807 struct nfs4_exception exception = { };
aa9c2669 3808 struct nfs4_label l, *label = NULL;
1da177e4 3809 int err;
a8a5da99 3810
aa9c2669
DQ		 3811 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3812
a8a5da99 3813 sattr->ia_mode &= ~current_umask();
1da177e4 3814 do {
078ea3df
TM		 3815 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3816 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3817 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3818 &exception);
3819 } while (exception.retry);
aa9c2669
DQ		 3820 nfs4_label_release_security(label);
3821
1da177e4
LT		 3822 return err;
3823}
3824
3825static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3826 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3827{
3828 struct inode *dir = dentry->d_inode;
3829 struct nfs4_readdir_arg args = {
3830 .fh = NFS_FH(dir),
56e4ebf8 3831 .pages = pages,
1da177e4
LT		 3832 .pgbase = 0,
3833 .count = count,
96d25e53 3834 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3835 .plus = plus,
1da177e4
LT		 3836 };
3837 struct nfs4_readdir_res res;
3838 struct rpc_message msg = {
3839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3840 .rpc_argp = &args,
3841 .rpc_resp = &res,
3842 .rpc_cred = cred,
3843 };
3844 int status;
3845
6de1472f
AV		 3846 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3847 dentry,
eadf4598 3848 (unsigned long long)cookie);
c3f52af3 3849 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3850 res.pgbase = args.pgbase;
7c513058 3851 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3852 if (status >= 0) {
c3f52af3 3853 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3854 status += args.pgbase;
3855 }
c4812998
TM		 3856
3857 nfs_invalidate_atime(dir);
3858
3110ff80 3859 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3860 return status;
3861}
3862
3863static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3864 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3865{
3866 struct nfs4_exception exception = { };
3867 int err;
3868 do {
c1578b76
TM		 3869 err = _nfs4_proc_readdir(dentry, cred, cookie,
3870 pages, count, plus);
3871 trace_nfs4_readdir(dentry->d_inode, err);
3872 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3873 &exception);
3874 } while (exception.retry);
3875 return err;
3876}
3877
3878static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3879 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3880{
57dc9a57
TM		 3881 struct nfs4_createdata *data;
3882 int mode = sattr->ia_mode;
3883 int status = -ENOMEM;
1da177e4 3884
57dc9a57
TM		 3885 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3886 if (data == NULL)
3887 goto out;
3888
1da177e4 3889 if (S_ISFIFO(mode))
57dc9a57 3890 data->arg.ftype = NF4FIFO;
1da177e4 3891 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3892 data->arg.ftype = NF4BLK;
3893 data->arg.u.device.specdata1 = MAJOR(rdev);
3894 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3895 }
3896 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3897 data->arg.ftype = NF4CHR;
3898 data->arg.u.device.specdata1 = MAJOR(rdev);
3899 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3900 } else if (!S_ISSOCK(mode)) {
3901 status = -EINVAL;
3902 goto out_free;
1da177e4 3903 }
1775fd3e 3904
aa9c2669 3905 data->arg.label = label;
57dc9a57 3906 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3907out_free:
57dc9a57
TM		 3908 nfs4_free_createdata(data);
3909out:
1da177e4
LT		 3910 return status;
3911}
3912
3913static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3914 struct iattr *sattr, dev_t rdev)
3915{
3916 struct nfs4_exception exception = { };
aa9c2669 3917 struct nfs4_label l, *label = NULL;
1da177e4 3918 int err;
a8a5da99 3919
aa9c2669
DQ		 3920 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3921
a8a5da99 3922 sattr->ia_mode &= ~current_umask();
1da177e4 3923 do {
078ea3df
TM		 3924 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3925 trace_nfs4_mknod(dir, &dentry->d_name, err);
3926 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3927 &exception);
3928 } while (exception.retry);
aa9c2669
DQ		 3929
3930 nfs4_label_release_security(label);
3931
1da177e4
LT		 3932 return err;
3933}
3934
3935static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3936 struct nfs_fsstat *fsstat)
3937{
3938 struct nfs4_statfs_arg args = {
3939 .fh = fhandle,
3940 .bitmask = server->attr_bitmask,
3941 };
24ad148a
BH		 3942 struct nfs4_statfs_res res = {
3943 .fsstat = fsstat,
3944 };
1da177e4
LT		 3945 struct rpc_message msg = {
3946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3947 .rpc_argp = &args,
24ad148a 3948 .rpc_resp = &res,
1da177e4
LT		 3949 };
3950
0e574af1 3951 nfs_fattr_init(fsstat->fattr);
7c513058 3952 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3953}
3954
3955static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3956{
3957 struct nfs4_exception exception = { };
3958 int err;
3959 do {
3960 err = nfs4_handle_exception(server,
3961 _nfs4_proc_statfs(server, fhandle, fsstat),
3962 &exception);
3963 } while (exception.retry);
3964 return err;
3965}
3966
3967static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3968 struct nfs_fsinfo *fsinfo)
3969{
3970 struct nfs4_fsinfo_arg args = {
3971 .fh = fhandle,
3972 .bitmask = server->attr_bitmask,
3973 };
3dda5e43
BH		 3974 struct nfs4_fsinfo_res res = {
3975 .fsinfo = fsinfo,
3976 };
1da177e4
LT		 3977 struct rpc_message msg = {
3978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3979 .rpc_argp = &args,
3dda5e43 3980 .rpc_resp = &res,
1da177e4
LT		 3981 };
3982
7c513058 3983 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3984}
3985
3986static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3987{
3988 struct nfs4_exception exception = { };
83ca7f5a 3989 unsigned long now = jiffies;
1da177e4
LT		 3990 int err;
3991
3992 do {
83ca7f5a 3993 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3994 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3995 if (err == 0) {
3996 struct nfs_client *clp = server->nfs_client;
3997
3998 spin_lock(&clp->cl_lock);
3999 clp->cl_lease_time = fsinfo->lease_time * HZ;
4000 clp->cl_last_renewal = now;
4001 spin_unlock(&clp->cl_lock);
4002 break;
4003 }
4004 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4005 } while (exception.retry);
4006 return err;
4007}
4008
4009static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4010{
e38eb650
BS		 4011 int error;
4012
0e574af1 4013 nfs_fattr_init(fsinfo->fattr);
e38eb650 4014 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4015 if (error == 0) {
4016 /* block layout checks this! */
4017 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4018 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4019 }
e38eb650
BS		 4020
4021 return error;
1da177e4
LT		 4022}
4023
4024static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4025 struct nfs_pathconf *pathconf)
4026{
4027 struct nfs4_pathconf_arg args = {
4028 .fh = fhandle,
4029 .bitmask = server->attr_bitmask,
4030 };
d45b2989
BH		 4031 struct nfs4_pathconf_res res = {
4032 .pathconf = pathconf,
4033 };
1da177e4
LT		 4034 struct rpc_message msg = {
4035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4036 .rpc_argp = &args,
d45b2989 4037 .rpc_resp = &res,
1da177e4
LT		 4038 };
4039
4040 /* None of the pathconf attributes are mandatory to implement */
4041 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4042 memset(pathconf, 0, sizeof(*pathconf));
4043 return 0;
4044 }
4045
0e574af1 4046 nfs_fattr_init(pathconf->fattr);
7c513058 4047 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4048}
4049
4050static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4051 struct nfs_pathconf *pathconf)
4052{
4053 struct nfs4_exception exception = { };
4054 int err;
4055
4056 do {
4057 err = nfs4_handle_exception(server,
4058 _nfs4_proc_pathconf(server, fhandle, pathconf),
4059 &exception);
4060 } while (exception.retry);
4061 return err;
4062}
4063
5521abfd 4064int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4065 const struct nfs_open_context *ctx,
4066 const struct nfs_lock_context *l_ctx,
4067 fmode_t fmode)
4068{
4069 const struct nfs_lockowner *lockowner = NULL;
4070
4071 if (l_ctx != NULL)
4072 lockowner = &l_ctx->lockowner;
5521abfd 4073 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4074}
4075EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4076
5521abfd
TM		 4077static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4078 const struct nfs_open_context *ctx,
4079 const struct nfs_lock_context *l_ctx,
4080 fmode_t fmode)
4081{
4082 nfs4_stateid current_stateid;
4083
e1253be0
TM		 4084 /* If the current stateid represents a lost lock, then exit */
4085 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4086 return true;
5521abfd
TM		 4087 return nfs4_stateid_match(stateid, &current_stateid);
4088}
4089
4090static bool nfs4_error_stateid_expired(int err)
4091{
4092 switch (err) {
4093 case -NFS4ERR_DELEG_REVOKED:
4094 case -NFS4ERR_ADMIN_REVOKED:
4095 case -NFS4ERR_BAD_STATEID:
4096 case -NFS4ERR_STALE_STATEID:
4097 case -NFS4ERR_OLD_STATEID:
4098 case -NFS4ERR_OPENMODE:
4099 case -NFS4ERR_EXPIRED:
4100 return true;
4101 }
4102 return false;
4103}
4104
d45f60c6 4105void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4106{
d45f60c6 4107 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4108}
4109
d45f60c6 4110static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4111{
d45f60c6 4112 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4113
d45f60c6
WAA		 4114 trace_nfs4_read(hdr, task->tk_status);
4115 if (nfs4_async_handle_error(task, server,
4116 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4117 rpc_restart_call_prepare(task);
ec06c096 4118 return -EAGAIN;
1da177e4 4119 }
8850df99 4120
d45f60c6 4121 __nfs4_read_done_cb(hdr);
1da177e4 4122 if (task->tk_status > 0)
d45f60c6 4123 renew_lease(server, hdr->timestamp);
ec06c096 4124 return 0;
1da177e4
LT		 4125}
4126
5521abfd 4127static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4128 struct nfs_pgio_args *args)
5521abfd
TM		 4129{
4130
4131 if (!nfs4_error_stateid_expired(task->tk_status) ||
4132 nfs4_stateid_is_current(&args->stateid,
4133 args->context,
4134 args->lock_context,
4135 FMODE_READ))
4136 return false;
4137 rpc_restart_call_prepare(task);
4138 return true;
4139}
4140
d45f60c6 4141static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4142{
4143
4144 dprintk("--> %s\n", __func__);
4145
d45f60c6 4146 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4147 return -EAGAIN;
d45f60c6 4148 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4149 return -EAGAIN;
d45f60c6
WAA		 4150 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4151 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4152}
4153
d45f60c6
WAA		 4154static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4155 struct rpc_message *msg)
1da177e4 4156{
d45f60c6
WAA		 4157 hdr->timestamp = jiffies;
4158 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4159 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4160 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4161}
4162
d45f60c6
WAA		 4163static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4164 struct nfs_pgio_header *hdr)
ea7c3303 4165{
d45f60c6
WAA		 4166 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4167 &hdr->args.seq_args,
4168 &hdr->res.seq_res,
9b206149 4169 task))
ef1820f9 4170 return 0;
d45f60c6
WAA		 4171 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4172 hdr->args.lock_context,
4173 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4174 return -EIO;
d45f60c6 4175 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4176 return -EIO;
4177 return 0;
1da177e4
LT		 4178}
4179
d45f60c6
WAA		 4180static int nfs4_write_done_cb(struct rpc_task *task,
4181 struct nfs_pgio_header *hdr)
1da177e4 4182{
d45f60c6 4183 struct inode *inode = hdr->inode;
1da177e4 4184
d45f60c6
WAA		 4185 trace_nfs4_write(hdr, task->tk_status);
4186 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4187 hdr->args.context->state) == -EAGAIN) {
d00c5d43 4188 rpc_restart_call_prepare(task);
788e7a89 4189 return -EAGAIN;
1da177e4 4190 }
4f9838c7 4191 if (task->tk_status >= 0) {
d45f60c6
WAA		 4192 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4193 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4194 }
788e7a89 4195 return 0;
1da177e4
LT		 4196}
4197
5521abfd 4198static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4199 struct nfs_pgio_args *args)
5521abfd
TM		 4200{
4201
4202 if (!nfs4_error_stateid_expired(task->tk_status) ||
4203 nfs4_stateid_is_current(&args->stateid,
4204 args->context,
4205 args->lock_context,
4206 FMODE_WRITE))
4207 return false;
4208 rpc_restart_call_prepare(task);
4209 return true;
4210}
4211
d45f60c6 4212static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4213{
d45f60c6 4214 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4215 return -EAGAIN;
d45f60c6 4216 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4217 return -EAGAIN;
d45f60c6
WAA		 4218 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4219 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4220}
4221
5a37f851 4222static
d45f60c6 4223bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4224{
5a37f851 4225 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4226 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4227 return false;
4228 /* Otherwise, request attributes if and only if we don't hold
4229 * a delegation
4230 */
011e2a7f 4231 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4232}
a69aef14 4233
d45f60c6
WAA		 4234static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4235 struct rpc_message *msg)
1da177e4 4236{
d45f60c6 4237 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4238
d45f60c6
WAA		 4239 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4240 hdr->args.bitmask = NULL;
4241 hdr->res.fattr = NULL;
7ffd1064 4242 } else
d45f60c6 4243 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4244
d45f60c6
WAA		 4245 if (!hdr->pgio_done_cb)
4246 hdr->pgio_done_cb = nfs4_write_done_cb;
4247 hdr->res.server = server;
4248 hdr->timestamp = jiffies;
1da177e4 4249
bdc7f021 4250 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4251 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4252}
4253
0b7c0153 4254static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4255{
d9afbd1b
TM		 4256 nfs4_setup_sequence(NFS_SERVER(data->inode),
4257 &data->args.seq_args,
4258 &data->res.seq_res,
4259 task);
1da177e4
LT		 4260}
4261
0b7c0153 4262static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4263{
1da177e4 4264 struct inode *inode = data->inode;
14516c3a 4265
cc668ab3 4266 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4267 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4268 rpc_restart_call_prepare(task);
788e7a89 4269 return -EAGAIN;
1da177e4 4270 }
788e7a89 4271 return 0;
1da177e4
LT		 4272}
4273
0b7c0153 4274static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4275{
4276 if (!nfs4_sequence_done(task, &data->res.seq_res))
4277 return -EAGAIN;
0b7c0153 4278 return data->commit_done_cb(task, data);
5f452431
FI		 4279}
4280
0b7c0153 4281static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4282{
788e7a89 4283 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4284
0b7c0153
FI		 4285 if (data->commit_done_cb == NULL)
4286 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4287 data->res.server = server;
bdc7f021 4288 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4289 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4290}
4291
9bc4e3ca
CL		 4292struct nfs4_renewdata {
4293 struct nfs_client *client;
4294 unsigned long timestamp;
4295};
4296
1da177e4
LT		 4297/*
4298 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4299 * standalone procedure for queueing an asynchronous RENEW.
4300 */
9bc4e3ca 4301static void nfs4_renew_release(void *calldata)
dc96aef9 4302{
9bc4e3ca
CL		 4303 struct nfs4_renewdata *data = calldata;
4304 struct nfs_client *clp = data->client;
dc96aef9 4305
0851de06
AB		 4306 if (atomic_read(&clp->cl_count) > 1)
4307 nfs4_schedule_state_renewal(clp);
4308 nfs_put_client(clp);
9bc4e3ca 4309 kfree(data);
dc96aef9
AB		 4310}
4311
9bc4e3ca 4312static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4313{
9bc4e3ca
CL		 4314 struct nfs4_renewdata *data = calldata;
4315 struct nfs_client *clp = data->client;
4316 unsigned long timestamp = data->timestamp;
1da177e4 4317
c6d01c6f 4318 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4319 switch (task->tk_status) {
4320 case 0:
4321 break;
4322 case -NFS4ERR_LEASE_MOVED:
4323 nfs4_schedule_lease_moved_recovery(clp);
4324 break;
4325 default:
95baa25c 4326 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4327 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4328 return;
4329 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4330 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4331 return;
4332 }
4333 nfs4_schedule_path_down_recovery(clp);
1da177e4 4334 }
452e9352 4335 do_renew_lease(clp, timestamp);
1da177e4
LT		 4336}
4337
963d8fe5
TM		 4338static const struct rpc_call_ops nfs4_renew_ops = {
4339 .rpc_call_done = nfs4_renew_done,
dc96aef9 4340 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4341};
4342
2f60ea6b 4343static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4344{
4345 struct rpc_message msg = {
4346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4347 .rpc_argp = clp,
b4454fe1 4348 .rpc_cred = cred,
1da177e4 4349 };
9bc4e3ca 4350 struct nfs4_renewdata *data;
1da177e4 4351
2f60ea6b
TM		 4352 if (renew_flags == 0)
4353 return 0;
0851de06
AB		 4354 if (!atomic_inc_not_zero(&clp->cl_count))
4355 return -EIO;
b569ad34 4356 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4357 if (data == NULL)
4358 return -ENOMEM;
4359 data->client = clp;
4360 data->timestamp = jiffies;
bc7a05ca 4361 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4362 &nfs4_renew_ops, data);
1da177e4
LT		 4363}
4364
8534d4ec 4365static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4366{
4367 struct rpc_message msg = {
4368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4369 .rpc_argp = clp,
b4454fe1 4370 .rpc_cred = cred,
1da177e4
LT		 4371 };
4372 unsigned long now = jiffies;
4373 int status;
4374
bc7a05ca 4375 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4376 if (status < 0)
4377 return status;
452e9352 4378 do_renew_lease(clp, now);
1da177e4
LT		 4379 return 0;
4380}
4381
aa1870af
BF		 4382static inline int nfs4_server_supports_acls(struct nfs_server *server)
4383{
7dd7d959 4384 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4385}
4386
21f498c2
TM		 4387/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4388 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4389 * the stack.
4390 */
21f498c2 4391#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4392
e9e3d724
NH		 4393static int buf_to_pages_noslab(const void *buf, size_t buflen,
4394 struct page **pages, unsigned int *pgbase)
4395{
4396 struct page *newpage, **spages;
4397 int rc = 0;
4398 size_t len;
4399 spages = pages;
4400
4401 do {
21f498c2 4402 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4403 newpage = alloc_page(GFP_KERNEL);
4404
4405 if (newpage == NULL)
4406 goto unwind;
4407 memcpy(page_address(newpage), buf, len);
4408 buf += len;
4409 buflen -= len;
4410 *pages++ = newpage;
4411 rc++;
4412 } while (buflen != 0);
4413
4414 return rc;
4415
4416unwind:
4417 for(; rc > 0; rc--)
4418 __free_page(spages[rc-1]);
4419 return -ENOMEM;
4420}
4421
e50a1c2e
BF		 4422struct nfs4_cached_acl {
4423 int cached;
4424 size_t len;
3e9d4154 4425 char data[0];
e50a1c2e
BF		 4426};
4427
4428static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4429{
4430 struct nfs_inode *nfsi = NFS_I(inode);
4431
4432 spin_lock(&inode->i_lock);
4433 kfree(nfsi->nfs4_acl);
4434 nfsi->nfs4_acl = acl;
4435 spin_unlock(&inode->i_lock);
4436}
4437
4438static void nfs4_zap_acl_attr(struct inode *inode)
4439{
4440 nfs4_set_cached_acl(inode, NULL);
4441}
4442
4443static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4444{
4445 struct nfs_inode *nfsi = NFS_I(inode);
4446 struct nfs4_cached_acl *acl;
4447 int ret = -ENOENT;
4448
4449 spin_lock(&inode->i_lock);
4450 acl = nfsi->nfs4_acl;
4451 if (acl == NULL)
4452 goto out;
4453 if (buf == NULL) /* user is just asking for length */
4454 goto out_len;
4455 if (acl->cached == 0)
4456 goto out;
4457 ret = -ERANGE; /* see getxattr(2) man page */
4458 if (acl->len > buflen)
4459 goto out;
4460 memcpy(buf, acl->data, acl->len);
4461out_len:
4462 ret = acl->len;
4463out:
4464 spin_unlock(&inode->i_lock);
4465 return ret;
4466}
4467
5794d21e 4468static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4469{
4470 struct nfs4_cached_acl *acl;
b291f1b1 4471 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4472
1f1ea6c2 4473 if (buflen <= PAGE_SIZE) {
b291f1b1 4474 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4475 if (acl == NULL)
4476 goto out;
4477 acl->cached = 1;
5794d21e 4478 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4479 } else {
4480 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4481 if (acl == NULL)
4482 goto out;
4483 acl->cached = 0;
4484 }
4485 acl->len = acl_len;
4486out:
4487 nfs4_set_cached_acl(inode, acl);
4488}
4489
bf118a34
AA		 4490/*
4491 * The getxattr API returns the required buffer length when called with a
4492 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4493 * the required buf. On a NULL buf, we send a page of data to the server
4494 * guessing that the ACL request can be serviced by a page. If so, we cache
4495 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4496 * the cache. If not so, we throw away the page, and cache the required
4497 * length. The next getxattr call will then produce another round trip to
4498 * the server, this time with the input buf of the required size.
4499 */
16b4289c 4500static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4501{
bf118a34 4502 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4503 struct nfs_getaclargs args = {
4504 .fh = NFS_FH(inode),
4505 .acl_pages = pages,
4506 .acl_len = buflen,
4507 };
663c79b3
BH		 4508 struct nfs_getaclres res = {
4509 .acl_len = buflen,
4510 };
aa1870af
BF		 4511 struct rpc_message msg = {
4512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4513 .rpc_argp = &args,
663c79b3 4514 .rpc_resp = &res,
aa1870af 4515 };
21f498c2
TM		 4516 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4517 int ret = -ENOMEM, i;
aa1870af 4518
bf118a34
AA		 4519 /* As long as we're doing a round trip to the server anyway,
4520 * let's be prepared for a page of acl data. */
4521 if (npages == 0)
4522 npages = 1;
21f498c2
TM		 4523 if (npages > ARRAY_SIZE(pages))
4524 return -ERANGE;
5a006899 4525
bf118a34
AA		 4526 for (i = 0; i < npages; i++) {
4527 pages[i] = alloc_page(GFP_KERNEL);
4528 if (!pages[i])
4529 goto out_free;
e50a1c2e 4530 }
5a006899
SP		 4531
4532 /* for decoding across pages */
4533 res.acl_scratch = alloc_page(GFP_KERNEL);
4534 if (!res.acl_scratch)
4535 goto out_free;
4536
bf118a34
AA		 4537 args.acl_len = npages * PAGE_SIZE;
4538 args.acl_pgbase = 0;
5a006899 4539
de040bec 4540 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4541 __func__, buf, buflen, npages, args.acl_len);
4542 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4543 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4544 if (ret)
4545 goto out_free;
bf118a34 4546
1f1ea6c2
TM		 4547 /* Handle the case where the passed-in buffer is too short */
4548 if (res.acl_flags & NFS4_ACL_TRUNC) {
4549 /* Did the user only issue a request for the acl length? */
4550 if (buf == NULL)
4551 goto out_ok;
e50a1c2e 4552 ret = -ERANGE;
1f1ea6c2 4553 goto out_free;
e50a1c2e 4554 }
1f1ea6c2 4555 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4556 if (buf) {
4557 if (res.acl_len > buflen) {
4558 ret = -ERANGE;
4559 goto out_free;
4560 }
1f1ea6c2 4561 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4562 }
1f1ea6c2
TM		 4563out_ok:
4564 ret = res.acl_len;
e50a1c2e 4565out_free:
bf118a34
AA		 4566 for (i = 0; i < npages; i++)
4567 if (pages[i])
4568 __free_page(pages[i]);
331818f1
TM		 4569 if (res.acl_scratch)
4570 __free_page(res.acl_scratch);
aa1870af
BF		 4571 return ret;
4572}
4573
16b4289c
TM		 4574static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4575{
4576 struct nfs4_exception exception = { };
4577 ssize_t ret;
4578 do {
4579 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4580 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4581 if (ret >= 0)
4582 break;
4583 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4584 } while (exception.retry);
4585 return ret;
4586}
4587
e50a1c2e
BF		 4588static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4589{
4590 struct nfs_server *server = NFS_SERVER(inode);
4591 int ret;
4592
4593 if (!nfs4_server_supports_acls(server))
4594 return -EOPNOTSUPP;
4595 ret = nfs_revalidate_inode(server, inode);
4596 if (ret < 0)
4597 return ret;
08a22b39
AK		 4598 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4599 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4600 ret = nfs4_read_cached_acl(inode, buf, buflen);
4601 if (ret != -ENOENT)
bf118a34
AA		 4602 /* -ENOENT is returned if there is no ACL or if there is an ACL
4603 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4604 return ret;
4605 return nfs4_get_acl_uncached(inode, buf, buflen);
4606}
4607
16b4289c 4608static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4609{
4610 struct nfs_server *server = NFS_SERVER(inode);
4611 struct page *pages[NFS4ACL_MAXPAGES];
4612 struct nfs_setaclargs arg = {
4613 .fh = NFS_FH(inode),
4614 .acl_pages = pages,
4615 .acl_len = buflen,
4616 };
73c403a9 4617 struct nfs_setaclres res;
4b580ee3
BF		 4618 struct rpc_message msg = {
4619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4620 .rpc_argp = &arg,
73c403a9 4621 .rpc_resp = &res,
4b580ee3 4622 };
21f498c2 4623 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4624 int ret, i;
4b580ee3
BF		 4625
4626 if (!nfs4_server_supports_acls(server))
4627 return -EOPNOTSUPP;
21f498c2
TM		 4628 if (npages > ARRAY_SIZE(pages))
4629 return -ERANGE;
e9e3d724
NH		 4630 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4631 if (i < 0)
4632 return i;
57ec14c5 4633 nfs4_inode_return_delegation(inode);
7c513058 4634 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4635
4636 /*
4637 * Free each page after tx, so the only ref left is
4638 * held by the network stack
4639 */
4640 for (; i > 0; i--)
4641 put_page(pages[i-1]);
4642
08a22b39
AK		 4643 /*
4644 * Acl update can result in inode attribute update.
4645 * so mark the attribute cache invalid.
4646 */
4647 spin_lock(&inode->i_lock);
4648 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4649 spin_unlock(&inode->i_lock);
f41f7418
TM		 4650 nfs_access_zap_cache(inode);
4651 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4652 return ret;
4653}
4654
16b4289c
TM		 4655static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4656{
4657 struct nfs4_exception exception = { };
4658 int err;
4659 do {
c1578b76
TM		 4660 err = __nfs4_proc_set_acl(inode, buf, buflen);
4661 trace_nfs4_set_acl(inode, err);
4662 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4663 &exception);
4664 } while (exception.retry);
4665 return err;
4666}
4667
aa9c2669
DQ		 4668#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4669static int _nfs4_get_security_label(struct inode *inode, void *buf,
4670 size_t buflen)
4671{
4672 struct nfs_server *server = NFS_SERVER(inode);
4673 struct nfs_fattr fattr;
4674 struct nfs4_label label = {0, 0, buflen, buf};
4675
4676 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4677 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4678 .fh = NFS_FH(inode),
4679 .bitmask = bitmask,
4680 };
4681 struct nfs4_getattr_res res = {
4682 .fattr = &fattr,
4683 .label = &label,
4684 .server = server,
4685 };
4686 struct rpc_message msg = {
4687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4688 .rpc_argp = &arg,
aa9c2669
DQ		 4689 .rpc_resp = &res,
4690 };
4691 int ret;
4692
4693 nfs_fattr_init(&fattr);
4694
fcb63a9b 4695 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4696 if (ret)
4697 return ret;
4698 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4699 return -ENOENT;
4700 if (buflen < label.len)
4701 return -ERANGE;
4702 return 0;
4703}
4704
4705static int nfs4_get_security_label(struct inode *inode, void *buf,
4706 size_t buflen)
4707{
4708 struct nfs4_exception exception = { };
4709 int err;
4710
4711 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4712 return -EOPNOTSUPP;
4713
4714 do {
c1578b76
TM		 4715 err = _nfs4_get_security_label(inode, buf, buflen);
4716 trace_nfs4_get_security_label(inode, err);
4717 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4718 &exception);
4719 } while (exception.retry);
4720 return err;
4721}
4722
4723static int _nfs4_do_set_security_label(struct inode *inode,
4724 struct nfs4_label *ilabel,
4725 struct nfs_fattr *fattr,
4726 struct nfs4_label *olabel)
4727{
4728
4729 struct iattr sattr = {0};
4730 struct nfs_server *server = NFS_SERVER(inode);
4731 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4732 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4733 .fh = NFS_FH(inode),
4734 .iap = &sattr,
4735 .server = server,
4736 .bitmask = bitmask,
4737 .label = ilabel,
4738 };
4739 struct nfs_setattrres res = {
4740 .fattr = fattr,
4741 .label = olabel,
4742 .server = server,
4743 };
4744 struct rpc_message msg = {
4745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4746 .rpc_argp = &arg,
aa9c2669
DQ		 4747 .rpc_resp = &res,
4748 };
4749 int status;
4750
12207f69 4751 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4752
12207f69 4753 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4754 if (status)
4755 dprintk("%s failed: %d\n", __func__, status);
4756
4757 return status;
4758}
4759
4760static int nfs4_do_set_security_label(struct inode *inode,
4761 struct nfs4_label *ilabel,
4762 struct nfs_fattr *fattr,
4763 struct nfs4_label *olabel)
4764{
4765 struct nfs4_exception exception = { };
4766 int err;
4767
4768 do {
c1578b76
TM		 4769 err = _nfs4_do_set_security_label(inode, ilabel,
4770 fattr, olabel);
4771 trace_nfs4_set_security_label(inode, err);
4772 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4773 &exception);
4774 } while (exception.retry);
4775 return err;
4776}
4777
4778static int
4779nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4780{
4781 struct nfs4_label ilabel, *olabel = NULL;
4782 struct nfs_fattr fattr;
4783 struct rpc_cred *cred;
4784 struct inode *inode = dentry->d_inode;
4785 int status;
4786
4787 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4788 return -EOPNOTSUPP;
4789
4790 nfs_fattr_init(&fattr);
4791
4792 ilabel.pi = 0;
4793 ilabel.lfs = 0;
4794 ilabel.label = (char *)buf;
4795 ilabel.len = buflen;
4796
4797 cred = rpc_lookup_cred();
4798 if (IS_ERR(cred))
4799 return PTR_ERR(cred);
4800
4801 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4802 if (IS_ERR(olabel)) {
4803 status = -PTR_ERR(olabel);
4804 goto out;
4805 }
4806
4807 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4808 if (status == 0)
4809 nfs_setsecurity(inode, &fattr, olabel);
4810
4811 nfs4_label_free(olabel);
4812out:
4813 put_rpccred(cred);
4814 return status;
4815}
4816#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4817
4818
1da177e4 4819static int
aa5190d0 4820nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4821{
aa5190d0
TM		 4822 struct nfs_client *clp = server->nfs_client;
4823
4824 if (task->tk_status >= 0)
1da177e4
LT		 4825 return 0;
4826 switch(task->tk_status) {
a1d0b5ee 4827 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4828 case -NFS4ERR_ADMIN_REVOKED:
4829 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4830 if (state == NULL)
4831 break;
4832 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4833 case -NFS4ERR_OPENMODE:
4834 if (state == NULL)
4835 break;
5d422301 4836 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4837 goto recovery_failed;
0400a6b0 4838 goto wait_on_recovery;
0ced63d1 4839 case -NFS4ERR_EXPIRED:
5d422301
TM		 4840 if (state != NULL) {
4841 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4842 goto recovery_failed;
5d422301 4843 }
1da177e4 4844 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4845 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4846 nfs4_schedule_lease_recovery(clp);
4847 goto wait_on_recovery;
519ae255
CL		 4848 case -NFS4ERR_MOVED:
4849 if (nfs4_schedule_migration_recovery(server) < 0)
4850 goto recovery_failed;
4851 goto wait_on_recovery;
8ef2f8d4
CL		 4852 case -NFS4ERR_LEASE_MOVED:
4853 nfs4_schedule_lease_moved_recovery(clp);
4854 goto wait_on_recovery;
4745e315
AA		 4855#if defined(CONFIG_NFS_V4_1)
4856 case -NFS4ERR_BADSESSION:
4857 case -NFS4ERR_BADSLOT:
4858 case -NFS4ERR_BAD_HIGH_SLOT:
4859 case -NFS4ERR_DEADSESSION:
4860 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4861 case -NFS4ERR_SEQ_FALSE_RETRY:
4862 case -NFS4ERR_SEQ_MISORDERED:
4863 dprintk("%s ERROR %d, Reset session\n", __func__,
4864 task->tk_status);
9f594791 4865 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4866 goto wait_on_recovery;
4745e315 4867#endif /* CONFIG_NFS_V4_1 */
1da177e4 4868 case -NFS4ERR_DELAY:
aa5190d0 4869 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4870 case -NFS4ERR_GRACE:
1da177e4 4871 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4872 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4873 case -NFS4ERR_OLD_STATEID:
f1478c13 4874 goto restart_call;
1da177e4
LT		 4875 }
4876 task->tk_status = nfs4_map_errors(task->tk_status);
4877 return 0;
9f51a78e 4878recovery_failed:
5d422301
TM		 4879 task->tk_status = -EIO;
4880 return 0;
0400a6b0 4881wait_on_recovery:
a2c0b9e2 4882 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4883 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4884 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4885 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4886 goto recovery_failed;
f1478c13 4887restart_call:
a2c0b9e2
TM		 4888 task->tk_status = 0;
4889 return -EAGAIN;
1da177e4
LT		 4890}
4891
f092075d
CL		 4892static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4893 nfs4_verifier *bootverf)
cd93710e
CL		 4894{
4895 __be32 verf[2];
4896
2c820d9a
CL		 4897 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4898 /* An impossible timestamp guarantees this value
4899 * will never match a generated boot time. */
4900 verf[0] = 0;
17f26b12 4901 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4902 } else {
f092075d 4903 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4904 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4905 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4906 }
cd93710e
CL		 4907 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4908}
4909
e984a55a
CL		 4910static unsigned int
4911nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4912 char *buf, size_t len)
4913{
4914 unsigned int result;
4915
4916 rcu_read_lock();
4917 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4918 clp->cl_ipaddr,
4919 rpc_peeraddr2str(clp->cl_rpcclient,
4920 RPC_DISPLAY_ADDR),
4921 rpc_peeraddr2str(clp->cl_rpcclient,
4922 RPC_DISPLAY_PROTO));
4923 rcu_read_unlock();
4924 return result;
4925}
4926
4927static unsigned int
4928nfs4_init_uniform_client_string(const struct nfs_client *clp,
4929 char *buf, size_t len)
4930{
55b59293 4931 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4932
4933 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4934 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4935 clp->rpc_ops->version,
4936 clp->cl_minorversion,
4937 nfs4_client_id_uniquifier,
4938 nodename);
e984a55a
CL		 4939 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4940 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4941 nodename);
e984a55a
CL		 4942}
4943
706cb8db
CL		 4944/*
4945 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4946 * services. Advertise one based on the address family of the
4947 * clientaddr.
4948 */
4949static unsigned int
4950nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4951{
4952 if (strchr(clp->cl_ipaddr, ':') != NULL)
4953 return scnprintf(buf, len, "tcp6");
4954 else
4955 return scnprintf(buf, len, "tcp");
4956}
4957
f11b2a1c
JL		 4958static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4959{
4960 struct nfs4_setclientid *sc = calldata;
4961
4962 if (task->tk_status == 0)
4963 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4964}
4965
4966static const struct rpc_call_ops nfs4_setclientid_ops = {
4967 .rpc_call_done = nfs4_setclientid_done,
4968};
4969
6bbb4ae8
CL		 4970/**
4971 * nfs4_proc_setclientid - Negotiate client ID
4972 * @clp: state data structure
4973 * @program: RPC program for NFSv4 callback service
4974 * @port: IP port number for NFS4 callback service
4975 * @cred: RPC credential to use for this call
4976 * @res: where to place the result
4977 *
4978 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4979 */
bb8b27e5
TM		 4980int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4981 unsigned short port, struct rpc_cred *cred,
4982 struct nfs4_setclientid_res *res)
1da177e4
LT		 4983{
4984 nfs4_verifier sc_verifier;
4985 struct nfs4_setclientid setclientid = {
4986 .sc_verifier = &sc_verifier,
4987 .sc_prog = program,
f4eecd5d 4988 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4989 };
4990 struct rpc_message msg = {
4991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4992 .rpc_argp = &setclientid,
bb8b27e5 4993 .rpc_resp = res,
286d7d6a 4994 .rpc_cred = cred,
1da177e4 4995 };
f11b2a1c
JL		 4996 struct rpc_task *task;
4997 struct rpc_task_setup task_setup_data = {
4998 .rpc_client = clp->cl_rpcclient,
4999 .rpc_message = &msg,
5000 .callback_ops = &nfs4_setclientid_ops,
5001 .callback_data = &setclientid,
5002 .flags = RPC_TASK_TIMEOUT,
5003 };
6bbb4ae8 5004 int status;
1da177e4 5005
de734831 5006 /* nfs_client_id4 */
f092075d 5007 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5008 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5009 setclientid.sc_name_len =
5010 nfs4_init_uniform_client_string(clp,
5011 setclientid.sc_name,
5012 sizeof(setclientid.sc_name));
5013 else
5014 setclientid.sc_name_len =
5015 nfs4_init_nonuniform_client_string(clp,
5016 setclientid.sc_name,
5017 sizeof(setclientid.sc_name));
de734831 5018 /* cb_client4 */
706cb8db
CL		 5019 setclientid.sc_netid_len =
5020 nfs4_init_callback_netid(clp,
5021 setclientid.sc_netid,
5022 sizeof(setclientid.sc_netid));
de734831 5023 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5024 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5025 clp->cl_ipaddr, port >> 8, port & 255);
5026
6bbb4ae8
CL		 5027 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5028 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5029 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5030 task = rpc_run_task(&task_setup_data);
5031 if (IS_ERR(task)) {
5032 status = PTR_ERR(task);
5033 goto out;
5034 }
5035 status = task->tk_status;
5036 if (setclientid.sc_cred) {
5037 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5038 put_rpccred(setclientid.sc_cred);
5039 }
5040 rpc_put_task(task);
5041out:
c6d01c6f 5042 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5043 dprintk("NFS reply setclientid: %d\n", status);
5044 return status;
1da177e4
LT		 5045}
5046
6bbb4ae8
CL		 5047/**
5048 * nfs4_proc_setclientid_confirm - Confirm client ID
5049 * @clp: state data structure
5050 * @res: result of a previous SETCLIENTID
5051 * @cred: RPC credential to use for this call
5052 *
5053 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5054 */
fd954ae1 5055int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5056 struct nfs4_setclientid_res *arg,
5057 struct rpc_cred *cred)
1da177e4 5058{
1da177e4
LT		 5059 struct rpc_message msg = {
5060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5061 .rpc_argp = arg,
286d7d6a 5062 .rpc_cred = cred,
1da177e4 5063 };
1da177e4
LT		 5064 int status;
5065
6bbb4ae8
CL		 5066 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5067 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5068 clp->cl_clientid);
1bd714f2 5069 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5070 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5071 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5072 return status;
5073}
5074
fe650407
TM		 5075struct nfs4_delegreturndata {
5076 struct nfs4_delegreturnargs args;
fa178f29 5077 struct nfs4_delegreturnres res;
fe650407
TM		 5078 struct nfs_fh fh;
5079 nfs4_stateid stateid;
26e976a8 5080 unsigned long timestamp;
fa178f29 5081 struct nfs_fattr fattr;
fe650407 5082 int rpc_status;
039b756a
PT		 5083 struct inode *inode;
5084 bool roc;
5085 u32 roc_barrier;
fe650407
TM		 5086};
5087
fe650407
TM		 5088static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5089{
5090 struct nfs4_delegreturndata *data = calldata;
938e1010 5091
14516c3a
TM		 5092 if (!nfs4_sequence_done(task, &data->res.seq_res))
5093 return;
938e1010 5094
ca8acf8d 5095 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5096 switch (task->tk_status) {
79708861 5097 case 0:
fa178f29 5098 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5099 case -NFS4ERR_ADMIN_REVOKED:
5100 case -NFS4ERR_DELEG_REVOKED:
5101 case -NFS4ERR_BAD_STATEID:
5102 case -NFS4ERR_OLD_STATEID:
5103 case -NFS4ERR_STALE_STATEID:
5104 case -NFS4ERR_EXPIRED:
5105 task->tk_status = 0;
039b756a
PT		 5106 if (data->roc)
5107 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5108 break;
79708861
RL		 5109 default:
5110 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
5111 -EAGAIN) {
d00c5d43 5112 rpc_restart_call_prepare(task);
79708861
RL		 5113 return;
5114 }
5115 }
5116 data->rpc_status = task->tk_status;
fe650407
TM		 5117}
5118
5119static void nfs4_delegreturn_release(void *calldata)
5120{
039b756a
PT		 5121 struct nfs4_delegreturndata *data = calldata;
5122
5123 if (data->roc)
5124 pnfs_roc_release(data->inode);
fe650407
TM		 5125 kfree(calldata);
5126}
5127
938e1010
AA		 5128static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5129{
5130 struct nfs4_delegreturndata *d_data;
5131
5132 d_data = (struct nfs4_delegreturndata *)data;
5133
039b756a
PT		 5134 if (d_data->roc &&
5135 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5136 return;
5137
d9afbd1b
TM		 5138 nfs4_setup_sequence(d_data->res.server,
5139 &d_data->args.seq_args,
5140 &d_data->res.seq_res,
5141 task);
938e1010 5142}
938e1010 5143
c8d149f3 5144static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5145 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5146 .rpc_call_done = nfs4_delegreturn_done,
5147 .rpc_release = nfs4_delegreturn_release,
5148};
5149
e6f81075 5150static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5151{
5152 struct nfs4_delegreturndata *data;
fa178f29 5153 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5154 struct rpc_task *task;
5138fde0
TM		 5155 struct rpc_message msg = {
5156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5157 .rpc_cred = cred,
5158 };
c970aa85
TM		 5159 struct rpc_task_setup task_setup_data = {
5160 .rpc_client = server->client,
5138fde0 5161 .rpc_message = &msg,
c970aa85
TM		 5162 .callback_ops = &nfs4_delegreturn_ops,
5163 .flags = RPC_TASK_ASYNC,
5164 };
e6f81075 5165 int status = 0;
fe650407 5166
8535b2be 5167 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5168 if (data == NULL)
5169 return -ENOMEM;
a9c92d6b 5170 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5171 data->args.fhandle = &data->fh;
5172 data->args.stateid = &data->stateid;
9e907fec 5173 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5174 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5175 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5176 data->res.fattr = &data->fattr;
5177 data->res.server = server;
5138fde0 5178 nfs_fattr_init(data->res.fattr);
26e976a8 5179 data->timestamp = jiffies;
fe650407 5180 data->rpc_status = 0;
039b756a
PT		 5181 data->inode = inode;
5182 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5183 pnfs_roc(inode) : false;
fe650407 5184
c970aa85 5185 task_setup_data.callback_data = data;
1174dd1f
TM		 5186 msg.rpc_argp = &data->args;
5187 msg.rpc_resp = &data->res;
c970aa85 5188 task = rpc_run_task(&task_setup_data);
7a1218a2 5189 if (IS_ERR(task))
fe650407 5190 return PTR_ERR(task);
e6f81075
TM		 5191 if (!issync)
5192 goto out;
fe650407 5193 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5194 if (status != 0)
5195 goto out;
5196 status = data->rpc_status;
e144cbcc
TM		 5197 if (status == 0)
5198 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5199 else
5200 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5201out:
e6b3c4db 5202 rpc_put_task(task);
fe650407 5203 return status;
1da177e4
LT		 5204}
5205
e6f81075 5206int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5207{
5208 struct nfs_server *server = NFS_SERVER(inode);
5209 struct nfs4_exception exception = { };
5210 int err;
5211 do {
e6f81075 5212 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5213 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5214 switch (err) {
5215 case -NFS4ERR_STALE_STATEID:
5216 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5217 case 0:
5218 return 0;
5219 }
5220 err = nfs4_handle_exception(server, err, &exception);
5221 } while (exception.retry);
5222 return err;
5223}
5224
5225#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5226#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5227
5228/*
5229 * sleep, with exponential backoff, and retry the LOCK operation.
5230 */
5231static unsigned long
5232nfs4_set_lock_task_retry(unsigned long timeout)
5233{
416ad3c9 5234 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5235 timeout <<= 1;
5236 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5237 return NFS4_LOCK_MAXTIMEOUT;
5238 return timeout;
5239}
5240
1da177e4
LT		 5241static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5242{
5243 struct inode *inode = state->inode;
5244 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5245 struct nfs_client *clp = server->nfs_client;
911d1aaf 5246 struct nfs_lockt_args arg = {
1da177e4 5247 .fh = NFS_FH(inode),
911d1aaf 5248 .fl = request,
1da177e4 5249 };
911d1aaf
TM		 5250 struct nfs_lockt_res res = {
5251 .denied = request,
1da177e4
LT		 5252 };
5253 struct rpc_message msg = {
5254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5255 .rpc_argp = &arg,
5256 .rpc_resp = &res,
5257 .rpc_cred = state->owner->so_cred,
5258 };
1da177e4
LT		 5259 struct nfs4_lock_state *lsp;
5260 int status;
5261
911d1aaf 5262 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5263 status = nfs4_set_lock_state(state, request);
5264 if (status != 0)
5265 goto out;
5266 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5267 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5268 arg.lock_owner.s_dev = server->s_dev;
7c513058 5269 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5270 switch (status) {
5271 case 0:
5272 request->fl_type = F_UNLCK;
5273 break;
5274 case -NFS4ERR_DENIED:
5275 status = 0;
1da177e4 5276 }
70cc6487 5277 request->fl_ops->fl_release_private(request);
a6f951dd 5278 request->fl_ops = NULL;
8d0a8a9d 5279out:
1da177e4
LT		 5280 return status;
5281}
5282
5283static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5284{
5285 struct nfs4_exception exception = { };
5286 int err;
5287
5288 do {
d1b748a5
TM		 5289 err = _nfs4_proc_getlk(state, cmd, request);
5290 trace_nfs4_get_lock(request, state, cmd, err);
5291 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5292 &exception);
5293 } while (exception.retry);
5294 return err;
5295}
5296
5297static int do_vfs_lock(struct file *file, struct file_lock *fl)
5298{
5299 int res = 0;
5300 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5301 case FL_POSIX:
5302 res = posix_lock_file_wait(file, fl);
5303 break;
5304 case FL_FLOCK:
5305 res = flock_lock_file_wait(file, fl);
5306 break;
5307 default:
5308 BUG();
5309 }
1da177e4
LT		 5310 return res;
5311}
5312
faf5f49c 5313struct nfs4_unlockdata {
911d1aaf
TM		 5314 struct nfs_locku_args arg;
5315 struct nfs_locku_res res;
faf5f49c
TM		 5316 struct nfs4_lock_state *lsp;
5317 struct nfs_open_context *ctx;
911d1aaf
TM		 5318 struct file_lock fl;
5319 const struct nfs_server *server;
26e976a8 5320 unsigned long timestamp;
faf5f49c
TM		 5321};
5322
911d1aaf
TM		 5323static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5324 struct nfs_open_context *ctx,
5325 struct nfs4_lock_state *lsp,
5326 struct nfs_seqid *seqid)
5327{
5328 struct nfs4_unlockdata *p;
5329 struct inode *inode = lsp->ls_state->inode;
5330
8535b2be 5331 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5332 if (p == NULL)
5333 return NULL;
5334 p->arg.fh = NFS_FH(inode);
5335 p->arg.fl = &p->fl;
5336 p->arg.seqid = seqid;
c1d51931 5337 p->res.seqid = seqid;
911d1aaf
TM		 5338 p->arg.stateid = &lsp->ls_stateid;
5339 p->lsp = lsp;
5340 atomic_inc(&lsp->ls_count);
5341 /* Ensure we don't close file until we're done freeing locks! */
5342 p->ctx = get_nfs_open_context(ctx);
5343 memcpy(&p->fl, fl, sizeof(p->fl));
5344 p->server = NFS_SERVER(inode);
5345 return p;
5346}
5347
06f814a3 5348static void nfs4_locku_release_calldata(void *data)
faf5f49c 5349{
963d8fe5 5350 struct nfs4_unlockdata *calldata = data;
911d1aaf 5351 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5352 nfs4_put_lock_state(calldata->lsp);
5353 put_nfs_open_context(calldata->ctx);
5354 kfree(calldata);
faf5f49c
TM		 5355}
5356
963d8fe5 5357static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5358{
963d8fe5 5359 struct nfs4_unlockdata *calldata = data;
faf5f49c 5360
14516c3a
TM		 5361 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5362 return;
faf5f49c
TM		 5363 switch (task->tk_status) {
5364 case 0:
f597c537
TM		 5365 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5366 &calldata->res.stateid);
26e976a8 5367 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5368 break;
9e33bed5
TM		 5369 case -NFS4ERR_BAD_STATEID:
5370 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5371 case -NFS4ERR_STALE_STATEID:
5372 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5373 break;
5374 default:
9e33bed5 5375 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5376 rpc_restart_call_prepare(task);
faf5f49c 5377 }
2b1bc308 5378 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5379}
5380
4ce70ada 5381static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5382{
4ce70ada 5383 struct nfs4_unlockdata *calldata = data;
faf5f49c 5384
911d1aaf 5385 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5386 goto out_wait;
795a88c9 5387 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5388 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5389 goto out_no_action;
faf5f49c 5390 }
26e976a8 5391 calldata->timestamp = jiffies;
035168ab 5392 if (nfs4_setup_sequence(calldata->server,
a893693c 5393 &calldata->arg.seq_args,
2240a9e2
TM		 5394 &calldata->res.seq_res,
5395 task) != 0)
5396 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5397 return;
5398out_no_action:
5399 task->tk_action = NULL;
5400out_wait:
5401 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5402}
5403
963d8fe5 5404static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5405 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5406 .rpc_call_done = nfs4_locku_done,
06f814a3 5407 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5408};
5409
a5d16a4d
TM		 5410static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5411 struct nfs_open_context *ctx,
5412 struct nfs4_lock_state *lsp,
5413 struct nfs_seqid *seqid)
5414{
5415 struct nfs4_unlockdata *data;
5138fde0
TM		 5416 struct rpc_message msg = {
5417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5418 .rpc_cred = ctx->cred,
5419 };
c970aa85
TM		 5420 struct rpc_task_setup task_setup_data = {
5421 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5422 .rpc_message = &msg,
c970aa85 5423 .callback_ops = &nfs4_locku_ops,
101070ca 5424 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5425 .flags = RPC_TASK_ASYNC,
5426 };
a5d16a4d 5427
fa940720
WAA		 5428 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5429 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5430
137d6aca
FF		 5431 /* Ensure this is an unlock - when canceling a lock, the
5432 * canceled lock is passed in, and it won't be an unlock.
5433 */
5434 fl->fl_type = F_UNLCK;
5435
a5d16a4d
TM		 5436 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5437 if (data == NULL) {
5438 nfs_free_seqid(seqid);
5439 return ERR_PTR(-ENOMEM);
5440 }
5441
a9c92d6b 5442 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5443 msg.rpc_argp = &data->arg;
5444 msg.rpc_resp = &data->res;
c970aa85
TM		 5445 task_setup_data.callback_data = data;
5446 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5447}
5448
faf5f49c
TM		 5449static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5450{
65b62a29
TM		 5451 struct inode *inode = state->inode;
5452 struct nfs4_state_owner *sp = state->owner;
5453 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5454 struct nfs_seqid *seqid;
1da177e4 5455 struct nfs4_lock_state *lsp;
06f814a3
TM		 5456 struct rpc_task *task;
5457 int status = 0;
536ff0f8 5458 unsigned char fl_flags = request->fl_flags;
faf5f49c 5459
8d0a8a9d 5460 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5461 /* Unlock _before_ we do the RPC call */
5462 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5463 /* Exclude nfs_delegation_claim_locks() */
5464 mutex_lock(&sp->so_delegreturn_mutex);
5465 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5466 down_read(&nfsi->rwsem);
5467 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5468 up_read(&nfsi->rwsem);
65b62a29 5469 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5470 goto out;
19e03c57
TM		 5471 }
5472 up_read(&nfsi->rwsem);
65b62a29 5473 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5474 if (status != 0)
9b073574
TM		 5475 goto out;
5476 /* Is this a delegated lock? */
8d0a8a9d 5477 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5478 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5479 goto out;
8535b2be 5480 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5481 status = -ENOMEM;
911d1aaf 5482 if (seqid == NULL)
9b073574 5483 goto out;
cd3758e3 5484 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5485 status = PTR_ERR(task);
5486 if (IS_ERR(task))
9b073574 5487 goto out;
a5d16a4d 5488 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5489 rpc_put_task(task);
9b073574 5490out:
536ff0f8 5491 request->fl_flags = fl_flags;
d1b748a5 5492 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5493 return status;
5494}
5495
a5d16a4d
TM		 5496struct nfs4_lockdata {
5497 struct nfs_lock_args arg;
5498 struct nfs_lock_res res;
5499 struct nfs4_lock_state *lsp;
5500 struct nfs_open_context *ctx;
5501 struct file_lock fl;
26e976a8 5502 unsigned long timestamp;
a5d16a4d
TM		 5503 int rpc_status;
5504 int cancelled;
66179efe 5505 struct nfs_server *server;
a5d16a4d
TM		 5506};
5507
5508static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5509 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5510 gfp_t gfp_mask)
1da177e4 5511{
a5d16a4d
TM		 5512 struct nfs4_lockdata *p;
5513 struct inode *inode = lsp->ls_state->inode;
1da177e4 5514 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5515
8535b2be 5516 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5517 if (p == NULL)
5518 return NULL;
5519
5520 p->arg.fh = NFS_FH(inode);
5521 p->arg.fl = &p->fl;
8535b2be 5522 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5523 if (p->arg.open_seqid == NULL)
5524 goto out_free;
8535b2be 5525 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5526 if (p->arg.lock_seqid == NULL)
2f74c0a0 5527 goto out_free_seqid;
a5d16a4d 5528 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5529 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5530 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5531 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5532 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5533 p->lsp = lsp;
66179efe 5534 p->server = server;
a5d16a4d
TM		 5535 atomic_inc(&lsp->ls_count);
5536 p->ctx = get_nfs_open_context(ctx);
5537 memcpy(&p->fl, fl, sizeof(p->fl));
5538 return p;
2f74c0a0
TM		 5539out_free_seqid:
5540 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5541out_free:
5542 kfree(p);
5543 return NULL;
5544}
5545
5546static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5547{
5548 struct nfs4_lockdata *data = calldata;
5549 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5550
3110ff80 5551 dprintk("%s: begin!\n", __func__);
2f74c0a0 5552 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5553 goto out_wait;
a5d16a4d
TM		 5554 /* Do we need to do an open_to_lock_owner? */
5555 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5556 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5557 goto out_release_lock_seqid;
8fe72bac 5558 }
8e472f33 5559 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5560 data->arg.new_lock_owner = 1;
c1d51931 5561 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5562 } else
5563 data->arg.new_lock_owner = 0;
5d422301
TM		 5564 if (!nfs4_valid_open_stateid(state)) {
5565 data->rpc_status = -EBADF;
5566 task->tk_action = NULL;
5567 goto out_release_open_seqid;
5568 }
26e976a8 5569 data->timestamp = jiffies;
035168ab
TM		 5570 if (nfs4_setup_sequence(data->server,
5571 &data->arg.seq_args,
2240a9e2 5572 &data->res.seq_res,
d9afbd1b 5573 task) == 0)
66179efe 5574 return;
5d422301 5575out_release_open_seqid:
2240a9e2
TM		 5576 nfs_release_seqid(data->arg.open_seqid);
5577out_release_lock_seqid:
5578 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5579out_wait:
5580 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5581 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5582}
5583
a5d16a4d
TM		 5584static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5585{
5586 struct nfs4_lockdata *data = calldata;
5587
3110ff80 5588 dprintk("%s: begin!\n", __func__);
a5d16a4d 5589
14516c3a
TM		 5590 if (!nfs4_sequence_done(task, &data->res.seq_res))
5591 return;
66179efe 5592
a5d16a4d 5593 data->rpc_status = task->tk_status;
a5d16a4d 5594 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5595 if (data->rpc_status == 0)
5596 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5597 else
5598 goto out;
5599 }
5600 if (data->rpc_status == 0) {
f597c537 5601 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5602 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5603 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5604 }
a5d16a4d 5605out:
3110ff80 5606 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5607}
5608
5609static void nfs4_lock_release(void *calldata)
5610{
5611 struct nfs4_lockdata *data = calldata;
5612
3110ff80 5613 dprintk("%s: begin!\n", __func__);
2f74c0a0 5614 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5615 if (data->cancelled != 0) {
5616 struct rpc_task *task;
5617 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5618 data->arg.lock_seqid);
5619 if (!IS_ERR(task))
bf294b41 5620 rpc_put_task_async(task);
3110ff80 5621 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5622 } else
5623 nfs_free_seqid(data->arg.lock_seqid);
5624 nfs4_put_lock_state(data->lsp);
5625 put_nfs_open_context(data->ctx);
5626 kfree(data);
3110ff80 5627 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5628}
5629
5630static const struct rpc_call_ops nfs4_lock_ops = {
5631 .rpc_call_prepare = nfs4_lock_prepare,
5632 .rpc_call_done = nfs4_lock_done,
5633 .rpc_release = nfs4_lock_release,
5634};
5635
2bee72a6
TM		 5636static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5637{
2bee72a6
TM		 5638 switch (error) {
5639 case -NFS4ERR_ADMIN_REVOKED:
5640 case -NFS4ERR_BAD_STATEID:
ecac799a 5641 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5642 if (new_lock_owner != 0 ||
795a88c9 5643 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5644 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5645 break;
5646 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5647 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5648 case -NFS4ERR_EXPIRED:
5649 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5650 };
5651}
5652
afe6c27c 5653static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5654{
5655 struct nfs4_lockdata *data;
5656 struct rpc_task *task;
5138fde0
TM		 5657 struct rpc_message msg = {
5658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5659 .rpc_cred = state->owner->so_cred,
5660 };
c970aa85
TM		 5661 struct rpc_task_setup task_setup_data = {
5662 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5663 .rpc_message = &msg,
c970aa85 5664 .callback_ops = &nfs4_lock_ops,
101070ca 5665 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5666 .flags = RPC_TASK_ASYNC,
5667 };
a5d16a4d
TM		 5668 int ret;
5669
3110ff80 5670 dprintk("%s: begin!\n", __func__);
cd3758e3 5671 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5672 fl->fl_u.nfs4_fl.owner,
5673 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5674 if (data == NULL)
5675 return -ENOMEM;
5676 if (IS_SETLKW(cmd))
5677 data->arg.block = 1;
a9c92d6b 5678 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5679 msg.rpc_argp = &data->arg;
5680 msg.rpc_resp = &data->res;
c970aa85 5681 task_setup_data.callback_data = data;
8fe72bac
TM		 5682 if (recovery_type > NFS_LOCK_NEW) {
5683 if (recovery_type == NFS_LOCK_RECLAIM)
5684 data->arg.reclaim = NFS_LOCK_RECLAIM;
5685 nfs4_set_sequence_privileged(&data->arg.seq_args);
5686 }
c970aa85 5687 task = rpc_run_task(&task_setup_data);
7a1218a2 5688 if (IS_ERR(task))
a5d16a4d 5689 return PTR_ERR(task);
a5d16a4d
TM		 5690 ret = nfs4_wait_for_completion_rpc_task(task);
5691 if (ret == 0) {
5692 ret = data->rpc_status;
2bee72a6
TM		 5693 if (ret)
5694 nfs4_handle_setlk_error(data->server, data->lsp,
5695 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5696 } else
5697 data->cancelled = 1;
e6b3c4db 5698 rpc_put_task(task);
3110ff80 5699 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5700 return ret;
1da177e4
LT		 5701}
5702
5703static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5704{
202b50dc 5705 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5706 struct nfs4_exception exception = {
5707 .inode = state->inode,
5708 };
202b50dc
TM		 5709 int err;
5710
5711 do {
42a2d13e
TM		 5712 /* Cache the lock if possible... */
5713 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5714 return 0;
afe6c27c 5715 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5716 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5717 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5718 break;
5719 nfs4_handle_exception(server, err, &exception);
5720 } while (exception.retry);
5721 return err;
1da177e4
LT		 5722}
5723
5724static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5725{
202b50dc 5726 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5727 struct nfs4_exception exception = {
5728 .inode = state->inode,
5729 };
202b50dc
TM		 5730 int err;
5731
6bfc93ef
TM		 5732 err = nfs4_set_lock_state(state, request);
5733 if (err != 0)
5734 return err;
f6de7a39 5735 if (!recover_lost_locks) {
ef1820f9
N		 5736 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5737 return 0;
5738 }
202b50dc 5739 do {
42a2d13e
TM		 5740 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5741 return 0;
afe6c27c 5742 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5743 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5744 switch (err) {
5745 default:
5746 goto out;
5747 case -NFS4ERR_GRACE:
5748 case -NFS4ERR_DELAY:
5749 nfs4_handle_exception(server, err, &exception);
5750 err = 0;
5751 }
202b50dc 5752 } while (exception.retry);
a9ed2e25 5753out:
202b50dc 5754 return err;
1da177e4
LT		 5755}
5756
f062eb6c 5757#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5758/**
5759 * nfs41_check_expired_locks - possibly free a lock stateid
5760 *
5761 * @state: NFSv4 state for an inode
5762 *
5763 * Returns NFS_OK if recovery for this stateid is now finished.
5764 * Otherwise a negative NFS4ERR value is returned.
5765 */
b01dd1d8 5766static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5767{
eb64cf96 5768 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5769 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5770 struct nfs_server *server = NFS_SERVER(state->inode);
5771
b01dd1d8 5772 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5773 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5774 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5775
5776 status = nfs41_test_stateid(server,
5777 &lsp->ls_stateid,
5778 cred);
08cb47fa 5779 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5780 if (status != NFS_OK) {
3e60ffdd
CL		 5781 /* Free the stateid unless the server
5782 * informs us the stateid is unrecognized. */
89af2739
CL		 5783 if (status != -NFS4ERR_BAD_STATEID)
5784 nfs41_free_stateid(server,
ab7cb0df
TM		 5785 &lsp->ls_stateid,
5786 cred);
795a88c9 5787 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5788 ret = status;
5789 }
5790 }
5791 };
5792
5793 return ret;
5794}
5795
5796static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5797{
5798 int status = NFS_OK;
5799
5800 if (test_bit(LK_STATE_IN_USE, &state->flags))
5801 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5802 if (status != NFS_OK)
5803 status = nfs4_lock_expired(state, request);
5804 return status;
f062eb6c
BS		 5805}
5806#endif
5807
1da177e4
LT		 5808static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5809{
9a99af49 5810 struct nfs4_state_owner *sp = state->owner;
19e03c57 5811 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5812 unsigned char fl_flags = request->fl_flags;
9a99af49 5813 unsigned int seq;
8e469ebd 5814 int status = -ENOLCK;
1da177e4 5815
8e469ebd
TM		 5816 if ((fl_flags & FL_POSIX) &&
5817 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5818 goto out;
6bfc93ef 5819 /* Is this a delegated open? */
6bfc93ef
TM		 5820 status = nfs4_set_lock_state(state, request);
5821 if (status != 0)
5822 goto out;
01c3b861
TM		 5823 request->fl_flags |= FL_ACCESS;
5824 status = do_vfs_lock(request->fl_file, request);
5825 if (status < 0)
5826 goto out;
19e03c57 5827 down_read(&nfsi->rwsem);
01c3b861 5828 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5829 /* Yes: cache locks! */
01c3b861 5830 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5831 request->fl_flags = fl_flags & ~FL_SLEEP;
5832 status = do_vfs_lock(request->fl_file, request);
5833 goto out_unlock;
01c3b861 5834 }
9a99af49
TM		 5835 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5836 up_read(&nfsi->rwsem);
afe6c27c 5837 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5838 if (status != 0)
9a99af49
TM		 5839 goto out;
5840 down_read(&nfsi->rwsem);
5841 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5842 status = -NFS4ERR_DELAY;
01c3b861 5843 goto out_unlock;
9a99af49 5844 }
6bfc93ef 5845 /* Note: we always want to sleep here! */
01c3b861 5846 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5847 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5848 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5849 "manager!\n", __func__);
01c3b861 5850out_unlock:
19e03c57 5851 up_read(&nfsi->rwsem);
01c3b861
TM		 5852out:
5853 request->fl_flags = fl_flags;
1da177e4
LT		 5854 return status;
5855}
5856
5857static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5858{
a1d0b5ee
TM		 5859 struct nfs4_exception exception = {
5860 .state = state,
05ffe24f 5861 .inode = state->inode,
a1d0b5ee 5862 };
1da177e4
LT		 5863 int err;
5864
5865 do {
965b5d67 5866 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5867 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5868 if (err == -NFS4ERR_DENIED)
5869 err = -EAGAIN;
1da177e4 5870 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5871 err, &exception);
1da177e4
LT		 5872 } while (exception.retry);
5873 return err;
5874}
5875
5876static int
5877nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5878{
5879 struct nfs_open_context *ctx;
5880 struct nfs4_state *state;
5881 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5882 int status;
5883
5884 /* verify open state */
cd3758e3 5885 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5886 state = ctx->state;
5887
5888 if (request->fl_start < 0 || request->fl_end < 0)
5889 return -EINVAL;
5890
d953126a
TM		 5891 if (IS_GETLK(cmd)) {
5892 if (state != NULL)
5893 return nfs4_proc_getlk(state, F_GETLK, request);
5894 return 0;
5895 }
1da177e4
LT		 5896
5897 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5898 return -EINVAL;
5899
d953126a
TM		 5900 if (request->fl_type == F_UNLCK) {
5901 if (state != NULL)
5902 return nfs4_proc_unlck(state, cmd, request);
5903 return 0;
5904 }
1da177e4 5905
d953126a
TM		 5906 if (state == NULL)
5907 return -ENOLCK;
55725513
TM		 5908 /*
5909 * Don't rely on the VFS having checked the file open mode,
5910 * since it won't do this for flock() locks.
5911 */
f44106e2 5912 switch (request->fl_type) {
55725513
TM		 5913 case F_RDLCK:
5914 if (!(filp->f_mode & FMODE_READ))
5915 return -EBADF;
5916 break;
5917 case F_WRLCK:
5918 if (!(filp->f_mode & FMODE_WRITE))
5919 return -EBADF;
5920 }
5921
1da177e4
LT		 5922 do {
5923 status = nfs4_proc_setlk(state, cmd, request);
5924 if ((status != -EAGAIN) || IS_SETLK(cmd))
5925 break;
5926 timeout = nfs4_set_lock_task_retry(timeout);
5927 status = -ERESTARTSYS;
5928 if (signalled())
5929 break;
5930 } while(status < 0);
1da177e4
LT		 5931 return status;
5932}
5933
db4f2e63 5934int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5935{
5936 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5937 int err;
5938
5939 err = nfs4_set_lock_state(state, fl);
5940 if (err != 0)
db4f2e63 5941 return err;
4a706fa0 5942 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5943 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5944}
6b3b5496 5945
cf470c3e
TM		 5946struct nfs_release_lockowner_data {
5947 struct nfs4_lock_state *lsp;
5ae67c4f 5948 struct nfs_server *server;
cf470c3e 5949 struct nfs_release_lockowner_args args;
b7e63a10 5950 struct nfs_release_lockowner_res res;
60ea6812 5951 unsigned long timestamp;
cf470c3e
TM		 5952};
5953
fbd4bfd1
CL		 5954static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5955{
5956 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5957 struct nfs_server *server = data->server;
5958 nfs40_setup_sequence(server, &data->args.seq_args,
5959 &data->res.seq_res, task);
5960 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5961 data->timestamp = jiffies;
fbd4bfd1
CL		 5962}
5963
5964static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5965{
5966 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5967 struct nfs_server *server = data->server;
5968
b7e63a10 5969 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5970
5971 switch (task->tk_status) {
5972 case 0:
5973 renew_lease(server, data->timestamp);
5974 break;
5975 case -NFS4ERR_STALE_CLIENTID:
5976 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5977 nfs4_schedule_lease_recovery(server->nfs_client);
5978 break;
60ea6812
CL		 5979 case -NFS4ERR_LEASE_MOVED:
5980 case -NFS4ERR_DELAY:
5981 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5982 rpc_restart_call_prepare(task);
5983 }
fbd4bfd1
CL		 5984}
5985
d3c7b7cc
TM		 5986static void nfs4_release_lockowner_release(void *calldata)
5987{
cf470c3e 5988 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5989 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5990 kfree(calldata);
5991}
5992
17280175 5993static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5994 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5995 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5996 .rpc_release = nfs4_release_lockowner_release,
5997};
5998
f1cdae87
JL		 5999static void
6000nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6001{
cf470c3e 6002 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6003 struct rpc_message msg = {
6004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6005 };
6006
6007 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6008 return;
fbd4bfd1 6009
cf470c3e
TM		 6010 data = kmalloc(sizeof(*data), GFP_NOFS);
6011 if (!data)
f1cdae87 6012 return;
cf470c3e 6013 data->lsp = lsp;
5ae67c4f 6014 data->server = server;
cf470c3e
TM		 6015 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6016 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6017 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6018
cf470c3e 6019 msg.rpc_argp = &data->args;
b7e63a10
TM		 6020 msg.rpc_resp = &data->res;
6021 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6022 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6023}
6024
aa1870af
BF		 6025#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6026
64c2ce8b
AK		 6027static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6028 const void *buf, size_t buflen,
6029 int flags, int type)
6b3b5496 6030{
64c2ce8b
AK		 6031 if (strcmp(key, "") != 0)
6032 return -EINVAL;
4b580ee3 6033
64c2ce8b 6034 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6035}
6036
64c2ce8b
AK		 6037static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6038 void *buf, size_t buflen, int type)
6b3b5496 6039{
64c2ce8b
AK		 6040 if (strcmp(key, "") != 0)
6041 return -EINVAL;
aa1870af 6042
64c2ce8b 6043 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6044}
6045
64c2ce8b
AK		 6046static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6047 size_t list_len, const char *name,
6048 size_t name_len, int type)
6b3b5496 6049{
64c2ce8b 6050 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6051
096455a2
BF		 6052 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6053 return 0;
64c2ce8b
AK		 6054
6055 if (list && len <= list_len)
6056 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6057 return len;
6b3b5496
BF		 6058}
6059
c9bccef6
DQ		 6060#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6061static inline int nfs4_server_supports_labels(struct nfs_server *server)
6062{
6063 return server->caps & NFS_CAP_SECURITY_LABEL;
6064}
6065
6066static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6067 const void *buf, size_t buflen,
6068 int flags, int type)
6069{
6070 if (security_ismaclabel(key))
6071 return nfs4_set_security_label(dentry, buf, buflen);
6072
6073 return -EOPNOTSUPP;
6074}
6075
6076static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6077 void *buf, size_t buflen, int type)
6078{
6079 if (security_ismaclabel(key))
6080 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6081 return -EOPNOTSUPP;
6082}
6083
6084static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6085 size_t list_len, const char *name,
6086 size_t name_len, int type)
6087{
6088 size_t len = 0;
6089
6090 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6091 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6092 if (list && len <= list_len)
6093 security_inode_listsecurity(dentry->d_inode, list, len);
6094 }
6095 return len;
6096}
6097
6098static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6099 .prefix = XATTR_SECURITY_PREFIX,
6100 .list = nfs4_xattr_list_nfs4_label,
6101 .get = nfs4_xattr_get_nfs4_label,
6102 .set = nfs4_xattr_set_nfs4_label,
6103};
6104#endif
6105
6106
533eb461
AA		 6107/*
6108 * nfs_fhget will use either the mounted_on_fileid or the fileid
6109 */
69aaaae1
TM		 6110static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6111{
533eb461
AA		 6112 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6113 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6114 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6115 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6116 return;
6117
6118 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6119 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6120 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6121 fattr->nlink = 2;
6122}
6123
f05d147f
BS		 6124static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6125 const struct qstr *name,
6126 struct nfs4_fs_locations *fs_locations,
6127 struct page *page)
683b57b4
TM		 6128{
6129 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6130 u32 bitmask[3] = {
361e624f 6131 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6132 };
6133 struct nfs4_fs_locations_arg args = {
6134 .dir_fh = NFS_FH(dir),
c228fd3a 6135 .name = name,
683b57b4
TM		 6136 .page = page,
6137 .bitmask = bitmask,
6138 };
22958463
BH		 6139 struct nfs4_fs_locations_res res = {
6140 .fs_locations = fs_locations,
6141 };
683b57b4
TM		 6142 struct rpc_message msg = {
6143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6144 .rpc_argp = &args,
22958463 6145 .rpc_resp = &res,
683b57b4
TM		 6146 };
6147 int status;
6148
3110ff80 6149 dprintk("%s: start\n", __func__);
533eb461
AA		 6150
6151 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6152 * is not supported */
6153 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6154 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6155 else
6156 bitmask[0] |= FATTR4_WORD0_FILEID;
6157
c228fd3a 6158 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6159 fs_locations->server = server;
830b8e33 6160 fs_locations->nlocations = 0;
f05d147f 6161 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6162 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6163 return status;
6164}
6165
f05d147f
BS		 6166int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6167 const struct qstr *name,
6168 struct nfs4_fs_locations *fs_locations,
6169 struct page *page)
db0a9593
BS		 6170{
6171 struct nfs4_exception exception = { };
6172 int err;
6173 do {
078ea3df
TM		 6174 err = _nfs4_proc_fs_locations(client, dir, name,
6175 fs_locations, page);
6176 trace_nfs4_get_fs_locations(dir, name, err);
6177 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6178 &exception);
6179 } while (exception.retry);
6180 return err;
6181}
6182
b03d735b
CL		 6183/*
6184 * This operation also signals the server that this client is
6185 * performing migration recovery. The server can stop returning
6186 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6187 * appended to this compound to identify the client ID which is
6188 * performing recovery.
6189 */
6190static int _nfs40_proc_get_locations(struct inode *inode,
6191 struct nfs4_fs_locations *locations,
6192 struct page *page, struct rpc_cred *cred)
6193{
6194 struct nfs_server *server = NFS_SERVER(inode);
6195 struct rpc_clnt *clnt = server->client;
6196 u32 bitmask[2] = {
6197 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6198 };
6199 struct nfs4_fs_locations_arg args = {
6200 .clientid = server->nfs_client->cl_clientid,
6201 .fh = NFS_FH(inode),
6202 .page = page,
6203 .bitmask = bitmask,
6204 .migration = 1, /* skip LOOKUP */
6205 .renew = 1, /* append RENEW */
6206 };
6207 struct nfs4_fs_locations_res res = {
6208 .fs_locations = locations,
6209 .migration = 1,
6210 .renew = 1,
6211 };
6212 struct rpc_message msg = {
6213 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6214 .rpc_argp = &args,
6215 .rpc_resp = &res,
6216 .rpc_cred = cred,
6217 };
6218 unsigned long now = jiffies;
6219 int status;
6220
6221 nfs_fattr_init(&locations->fattr);
6222 locations->server = server;
6223 locations->nlocations = 0;
6224
6225 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6226 nfs4_set_sequence_privileged(&args.seq_args);
6227 status = nfs4_call_sync_sequence(clnt, server, &msg,
6228 &args.seq_args, &res.seq_res);
6229 if (status)
6230 return status;
6231
6232 renew_lease(server, now);
6233 return 0;
6234}
6235
6236#ifdef CONFIG_NFS_V4_1
6237
6238/*
6239 * This operation also signals the server that this client is
6240 * performing migration recovery. The server can stop asserting
6241 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6242 * performing this operation is identified in the SEQUENCE
6243 * operation in this compound.
6244 *
6245 * When the client supports GETATTR(fs_locations_info), it can
6246 * be plumbed in here.
6247 */
6248static int _nfs41_proc_get_locations(struct inode *inode,
6249 struct nfs4_fs_locations *locations,
6250 struct page *page, struct rpc_cred *cred)
6251{
6252 struct nfs_server *server = NFS_SERVER(inode);
6253 struct rpc_clnt *clnt = server->client;
6254 u32 bitmask[2] = {
6255 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6256 };
6257 struct nfs4_fs_locations_arg args = {
6258 .fh = NFS_FH(inode),
6259 .page = page,
6260 .bitmask = bitmask,
6261 .migration = 1, /* skip LOOKUP */
6262 };
6263 struct nfs4_fs_locations_res res = {
6264 .fs_locations = locations,
6265 .migration = 1,
6266 };
6267 struct rpc_message msg = {
6268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6269 .rpc_argp = &args,
6270 .rpc_resp = &res,
6271 .rpc_cred = cred,
6272 };
6273 int status;
6274
6275 nfs_fattr_init(&locations->fattr);
6276 locations->server = server;
6277 locations->nlocations = 0;
6278
6279 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6280 nfs4_set_sequence_privileged(&args.seq_args);
6281 status = nfs4_call_sync_sequence(clnt, server, &msg,
6282 &args.seq_args, &res.seq_res);
6283 if (status == NFS4_OK &&
6284 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6285 status = -NFS4ERR_LEASE_MOVED;
6286 return status;
6287}
6288
6289#endif /* CONFIG_NFS_V4_1 */
6290
6291/**
6292 * nfs4_proc_get_locations - discover locations for a migrated FSID
6293 * @inode: inode on FSID that is migrating
6294 * @locations: result of query
6295 * @page: buffer
6296 * @cred: credential to use for this operation
6297 *
6298 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6299 * operation failed, or a negative errno if a local error occurred.
6300 *
6301 * On success, "locations" is filled in, but if the server has
6302 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6303 * asserted.
6304 *
6305 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6306 * from this client that require migration recovery.
6307 */
6308int nfs4_proc_get_locations(struct inode *inode,
6309 struct nfs4_fs_locations *locations,
6310 struct page *page, struct rpc_cred *cred)
6311{
6312 struct nfs_server *server = NFS_SERVER(inode);
6313 struct nfs_client *clp = server->nfs_client;
6314 const struct nfs4_mig_recovery_ops *ops =
6315 clp->cl_mvops->mig_recovery_ops;
6316 struct nfs4_exception exception = { };
6317 int status;
6318
6319 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6320 (unsigned long long)server->fsid.major,
6321 (unsigned long long)server->fsid.minor,
6322 clp->cl_hostname);
6323 nfs_display_fhandle(NFS_FH(inode), __func__);
6324
6325 do {
6326 status = ops->get_locations(inode, locations, page, cred);
6327 if (status != -NFS4ERR_DELAY)
6328 break;
6329 nfs4_handle_exception(server, status, &exception);
6330 } while (exception.retry);
6331 return status;
6332}
6333
44c99933
CL		 6334/*
6335 * This operation also signals the server that this client is
6336 * performing "lease moved" recovery. The server can stop
6337 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6338 * is appended to this compound to identify the client ID which is
6339 * performing recovery.
6340 */
6341static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6342{
6343 struct nfs_server *server = NFS_SERVER(inode);
6344 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6345 struct rpc_clnt *clnt = server->client;
6346 struct nfs4_fsid_present_arg args = {
6347 .fh = NFS_FH(inode),
6348 .clientid = clp->cl_clientid,
6349 .renew = 1, /* append RENEW */
6350 };
6351 struct nfs4_fsid_present_res res = {
6352 .renew = 1,
6353 };
6354 struct rpc_message msg = {
6355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6356 .rpc_argp = &args,
6357 .rpc_resp = &res,
6358 .rpc_cred = cred,
6359 };
6360 unsigned long now = jiffies;
6361 int status;
6362
6363 res.fh = nfs_alloc_fhandle();
6364 if (res.fh == NULL)
6365 return -ENOMEM;
6366
6367 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6368 nfs4_set_sequence_privileged(&args.seq_args);
6369 status = nfs4_call_sync_sequence(clnt, server, &msg,
6370 &args.seq_args, &res.seq_res);
6371 nfs_free_fhandle(res.fh);
6372 if (status)
6373 return status;
6374
6375 do_renew_lease(clp, now);
6376 return 0;
6377}
6378
6379#ifdef CONFIG_NFS_V4_1
6380
6381/*
6382 * This operation also signals the server that this client is
6383 * performing "lease moved" recovery. The server can stop asserting
6384 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6385 * this operation is identified in the SEQUENCE operation in this
6386 * compound.
6387 */
6388static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6389{
6390 struct nfs_server *server = NFS_SERVER(inode);
6391 struct rpc_clnt *clnt = server->client;
6392 struct nfs4_fsid_present_arg args = {
6393 .fh = NFS_FH(inode),
6394 };
6395 struct nfs4_fsid_present_res res = {
6396 };
6397 struct rpc_message msg = {
6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6399 .rpc_argp = &args,
6400 .rpc_resp = &res,
6401 .rpc_cred = cred,
6402 };
6403 int status;
6404
6405 res.fh = nfs_alloc_fhandle();
6406 if (res.fh == NULL)
6407 return -ENOMEM;
6408
6409 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6410 nfs4_set_sequence_privileged(&args.seq_args);
6411 status = nfs4_call_sync_sequence(clnt, server, &msg,
6412 &args.seq_args, &res.seq_res);
6413 nfs_free_fhandle(res.fh);
6414 if (status == NFS4_OK &&
6415 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6416 status = -NFS4ERR_LEASE_MOVED;
6417 return status;
6418}
6419
6420#endif /* CONFIG_NFS_V4_1 */
6421
6422/**
6423 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6424 * @inode: inode on FSID to check
6425 * @cred: credential to use for this operation
6426 *
6427 * Server indicates whether the FSID is present, moved, or not
6428 * recognized. This operation is necessary to clear a LEASE_MOVED
6429 * condition for this client ID.
6430 *
6431 * Returns NFS4_OK if the FSID is present on this server,
6432 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6433 * NFS4ERR code if some error occurred on the server, or a
6434 * negative errno if a local failure occurred.
6435 */
6436int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6437{
6438 struct nfs_server *server = NFS_SERVER(inode);
6439 struct nfs_client *clp = server->nfs_client;
6440 const struct nfs4_mig_recovery_ops *ops =
6441 clp->cl_mvops->mig_recovery_ops;
6442 struct nfs4_exception exception = { };
6443 int status;
6444
6445 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6446 (unsigned long long)server->fsid.major,
6447 (unsigned long long)server->fsid.minor,
6448 clp->cl_hostname);
6449 nfs_display_fhandle(NFS_FH(inode), __func__);
6450
6451 do {
6452 status = ops->fsid_present(inode, cred);
6453 if (status != -NFS4ERR_DELAY)
6454 break;
6455 nfs4_handle_exception(server, status, &exception);
6456 } while (exception.retry);
6457 return status;
6458}
6459
5ec16a85 6460/**
a5250def
WAA		 6461 * If 'use_integrity' is true and the state managment nfs_client
6462 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6463 * and the machine credential as per RFC3530bis and RFC5661 Security
6464 * Considerations sections. Otherwise, just use the user cred with the
6465 * filesystem's rpc_client.
5ec16a85 6466 */
a5250def 6467static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6468{
6469 int status;
6470 struct nfs4_secinfo_arg args = {
6471 .dir_fh = NFS_FH(dir),
6472 .name = name,
6473 };
6474 struct nfs4_secinfo_res res = {
6475 .flavors = flavors,
6476 };
6477 struct rpc_message msg = {
6478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6479 .rpc_argp = &args,
6480 .rpc_resp = &res,
6481 };
a5250def 6482 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6483 struct rpc_cred *cred = NULL;
a5250def
WAA		 6484
6485 if (use_integrity) {
6486 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6487 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6488 msg.rpc_cred = cred;
a5250def 6489 }
5a5ea0d4
BS		 6490
6491 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6492
6493 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6494 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6495
a5250def
WAA		 6496 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6497 &res.seq_res, 0);
5a5ea0d4 6498 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6499
7cb852df
WAA		 6500 if (cred)
6501 put_rpccred(cred);
a5250def 6502
5a5ea0d4
BS		 6503 return status;
6504}
6505
72de53ec
BS		 6506int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6507 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6508{
6509 struct nfs4_exception exception = { };
6510 int err;
6511 do {
a5250def
WAA		 6512 err = -NFS4ERR_WRONGSEC;
6513
6514 /* try to use integrity protection with machine cred */
6515 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6516 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6517
6518 /*
6519 * if unable to use integrity protection, or SECINFO with
6520 * integrity protection returns NFS4ERR_WRONGSEC (which is
6521 * disallowed by spec, but exists in deployed servers) use
6522 * the current filesystem's rpc_client and the user cred.
6523 */
6524 if (err == -NFS4ERR_WRONGSEC)
6525 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6526
078ea3df
TM		 6527 trace_nfs4_secinfo(dir, name, err);
6528 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6529 &exception);
6530 } while (exception.retry);
6531 return err;
6532}
6533
557134a3 6534#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6535/*
6536 * Check the exchange flags returned by the server for invalid flags, having
6537 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6538 * DS flags set.
6539 */
6540static int nfs4_check_cl_exchange_flags(u32 flags)
6541{
6542 if (flags & ~EXCHGID4_FLAG_MASK_R)
6543 goto out_inval;
6544 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6545 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6546 goto out_inval;
6547 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6548 goto out_inval;
6549 return NFS_OK;
6550out_inval:
6551 return -NFS4ERR_INVAL;
6552}
6553
78fe0f41 6554static bool
79d4e1f0
CL		 6555nfs41_same_server_scope(struct nfs41_server_scope *a,
6556 struct nfs41_server_scope *b)
78fe0f41
WAA		 6557{
6558 if (a->server_scope_sz == b->server_scope_sz &&
6559 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6560 return true;
6561
6562 return false;
6563}
6564
7c44f1ae
WAA		 6565/*
6566 * nfs4_proc_bind_conn_to_session()
6567 *
6568 * The 4.1 client currently uses the same TCP connection for the
6569 * fore and backchannel.
6570 */
2cf047c9 6571int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6572{
6573 int status;
6574 struct nfs41_bind_conn_to_session_res res;
6575 struct rpc_message msg = {
6576 .rpc_proc =
6577 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6578 .rpc_argp = clp,
6579 .rpc_resp = &res,
2cf047c9 6580 .rpc_cred = cred,
7c44f1ae
WAA		 6581 };
6582
6583 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6584
6585 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6586 if (unlikely(res.session == NULL)) {
6587 status = -ENOMEM;
6588 goto out;
6589 }
6590
6591 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6592 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6593 if (status == 0) {
6594 if (memcmp(res.session->sess_id.data,
6595 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6596 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6597 status = -EIO;
6598 goto out_session;
6599 }
6600 if (res.dir != NFS4_CDFS4_BOTH) {
6601 dprintk("NFS: %s: Unexpected direction from server\n",
6602 __func__);
6603 status = -EIO;
6604 goto out_session;
6605 }
6606 if (res.use_conn_in_rdma_mode) {
6607 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6608 __func__);
6609 status = -EIO;
6610 goto out_session;
6611 }
6612 }
6613out_session:
6614 kfree(res.session);
6615out:
6616 dprintk("<-- %s status= %d\n", __func__, status);
6617 return status;
6618}
6619
99fe60d0 6620/*
fa940720
WAA		 6621 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6622 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6623 */
6624static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6625 .how = SP4_MACH_CRED,
6626 .enforce.u.words = {
6627 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6628 1 << (OP_EXCHANGE_ID - 32) |
6629 1 << (OP_CREATE_SESSION - 32) |
6630 1 << (OP_DESTROY_SESSION - 32) |
6631 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6632 },
6633 .allow.u.words = {
6634 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6635 1 << (OP_LOCKU) |
6636 1 << (OP_COMMIT),
8b5bee2e 6637 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6638 1 << (OP_SECINFO_NO_NAME - 32) |
6639 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6640 1 << (OP_FREE_STATEID - 32) |
6641 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6642 }
6643};
6644
6645/*
6646 * Select the state protection mode for client `clp' given the server results
6647 * from exchange_id in `sp'.
99fe60d0 6648 *
2031cd1a
WAA		 6649 * Returns 0 on success, negative errno otherwise.
6650 */
6651static int nfs4_sp4_select_mode(struct nfs_client *clp,
6652 struct nfs41_state_protection *sp)
6653{
6654 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6655 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6656 1 << (OP_EXCHANGE_ID - 32) |
6657 1 << (OP_CREATE_SESSION - 32) |
6658 1 << (OP_DESTROY_SESSION - 32) |
6659 1 << (OP_DESTROY_CLIENTID - 32)
6660 };
6661 unsigned int i;
6662
6663 if (sp->how == SP4_MACH_CRED) {
6664 /* Print state protect result */
6665 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6666 for (i = 0; i <= LAST_NFS4_OP; i++) {
6667 if (test_bit(i, sp->enforce.u.longs))
6668 dfprintk(MOUNT, " enforce op %d\n", i);
6669 if (test_bit(i, sp->allow.u.longs))
6670 dfprintk(MOUNT, " allow op %d\n", i);
6671 }
6672
6673 /* make sure nothing is on enforce list that isn't supported */
6674 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6675 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6676 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6677 return -EINVAL;
6678 }
6679 }
6680
6681 /*
6682 * Minimal mode - state operations are allowed to use machine
6683 * credential. Note this already happens by default, so the
6684 * client doesn't have to do anything more than the negotiation.
6685 *
6686 * NOTE: we don't care if EXCHANGE_ID is in the list -
6687 * we're already using the machine cred for exchange_id
6688 * and will never use a different cred.
6689 */
6690 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6691 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6692 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6693 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6694 dfprintk(MOUNT, "sp4_mach_cred:\n");
6695 dfprintk(MOUNT, " minimal mode enabled\n");
6696 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6697 } else {
6698 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6699 return -EINVAL;
6700 }
fa940720
WAA		 6701
6702 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6703 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6704 dfprintk(MOUNT, " cleanup mode enabled\n");
6705 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6706 }
8b5bee2e
WAA		 6707
6708 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6709 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6710 dfprintk(MOUNT, " secinfo mode enabled\n");
6711 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6712 }
3787d506
WAA		 6713
6714 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6715 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6716 dfprintk(MOUNT, " stateid mode enabled\n");
6717 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6718 }
8c21c62c
WAA		 6719
6720 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6721 dfprintk(MOUNT, " write mode enabled\n");
6722 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6723 }
6724
6725 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6726 dfprintk(MOUNT, " commit mode enabled\n");
6727 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6728 }
2031cd1a
WAA		 6729 }
6730
6731 return 0;
6732}
6733
6734/*
6735 * _nfs4_proc_exchange_id()
6bbb4ae8 6736 *
2031cd1a 6737 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6738 */
2031cd1a
WAA		 6739static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6740 u32 sp4_how)
99fe60d0
BH		 6741{
6742 nfs4_verifier verifier;
6743 struct nfs41_exchange_id_args args = {
cd93710e 6744 .verifier = &verifier,
99fe60d0 6745 .client = clp,
cd3fadec 6746#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6747 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6748 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6749 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6750#else
6751 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6752 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6753#endif
99fe60d0
BH		 6754 };
6755 struct nfs41_exchange_id_res res = {
32b01310 6756 0
99fe60d0
BH		 6757 };
6758 int status;
6759 struct rpc_message msg = {
6760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6761 .rpc_argp = &args,
6762 .rpc_resp = &res,
6763 .rpc_cred = cred,
6764 };
99fe60d0 6765
f092075d 6766 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6767 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6768 sizeof(args.id));
6bbb4ae8
CL		 6769 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6770 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6771 args.id_len, args.id);
99fe60d0 6772
acdeb69d 6773 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6774 GFP_NOFS);
acdeb69d 6775 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6776 status = -ENOMEM;
6777 goto out;
6778 }
78fe0f41 6779
79d4e1f0 6780 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6781 GFP_NOFS);
177313f1 6782 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6783 status = -ENOMEM;
acdeb69d 6784 goto out_server_owner;
abe9a6d5 6785 }
78fe0f41 6786
bbafffd2 6787 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6788 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6789 status = -ENOMEM;
6790 goto out_server_scope;
6791 }
6792
2031cd1a
WAA		 6793 switch (sp4_how) {
6794 case SP4_NONE:
6795 args.state_protect.how = SP4_NONE;
6796 break;
6797
6798 case SP4_MACH_CRED:
6799 args.state_protect = nfs4_sp4_mach_cred_request;
6800 break;
6801
6802 default:
6803 /* unsupported! */
6804 WARN_ON_ONCE(1);
6805 status = -EINVAL;
6806 goto out_server_scope;
6807 }
6808
1bd714f2 6809 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6810 trace_nfs4_exchange_id(clp, status);
177313f1 6811 if (status == 0)
32b01310 6812 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6813
2031cd1a
WAA		 6814 if (status == 0)
6815 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6816
acdeb69d 6817 if (status == 0) {
32b01310
TM		 6818 clp->cl_clientid = res.clientid;
6819 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6820 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6821 clp->cl_seqid = res.seqid;
6822
acdeb69d
CL		 6823 kfree(clp->cl_serverowner);
6824 clp->cl_serverowner = res.server_owner;
6825 res.server_owner = NULL;
78fe0f41 6826
7d2ed9ac 6827 /* use the most recent implementation id */
59155546
CL		 6828 kfree(clp->cl_implid);
6829 clp->cl_implid = res.impl_id;
7d2ed9ac 6830
177313f1 6831 if (clp->cl_serverscope != NULL &&
79d4e1f0 6832 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6833 res.server_scope)) {
6834 dprintk("%s: server_scope mismatch detected\n",
6835 __func__);
6836 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6837 kfree(clp->cl_serverscope);
6838 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6839 }
6840
177313f1 6841 if (clp->cl_serverscope == NULL) {
79d4e1f0 6842 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6843 goto out;
6844 }
32b01310
TM		 6845 } else
6846 kfree(res.impl_id);
7d2ed9ac 6847
acdeb69d
CL		 6848out_server_owner:
6849 kfree(res.server_owner);
7d2ed9ac 6850out_server_scope:
abe9a6d5
WAA		 6851 kfree(res.server_scope);
6852out:
177313f1 6853 if (clp->cl_implid != NULL)
6bbb4ae8 6854 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6855 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6856 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6857 clp->cl_implid->date.seconds,
6858 clp->cl_implid->date.nseconds);
6bbb4ae8 6859 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6860 return status;
6861}
6862
2031cd1a
WAA		 6863/*
6864 * nfs4_proc_exchange_id()
6865 *
6866 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6867 *
6868 * Since the clientid has expired, all compounds using sessions
6869 * associated with the stale clientid will be returning
6870 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6871 * be in some phase of session reset.
6872 *
6873 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6874 */
6875int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6876{
6877 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6878 int status;
6879
6880 /* try SP4_MACH_CRED if krb5i/p */
6881 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6882 authflavor == RPC_AUTH_GSS_KRB5P) {
6883 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6884 if (!status)
6885 return 0;
6886 }
6887
6888 /* try SP4_NONE */
6889 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6890}
6891
66245539
TM		 6892static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6893 struct rpc_cred *cred)
6894{
6895 struct rpc_message msg = {
6896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6897 .rpc_argp = clp,
6898 .rpc_cred = cred,
6899 };
6900 int status;
6901
6902 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6903 trace_nfs4_destroy_clientid(clp, status);
66245539 6904 if (status)
02c67525 6905 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6906 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6907 return status;
6908}
6909
6910static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6911 struct rpc_cred *cred)
6912{
6913 unsigned int loop;
6914 int ret;
6915
6916 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6917 ret = _nfs4_proc_destroy_clientid(clp, cred);
6918 switch (ret) {
6919 case -NFS4ERR_DELAY:
6920 case -NFS4ERR_CLIENTID_BUSY:
6921 ssleep(1);
6922 break;
6923 default:
6924 return ret;
6925 }
6926 }
6927 return 0;
6928}
6929
6930int nfs4_destroy_clientid(struct nfs_client *clp)
6931{
6932 struct rpc_cred *cred;
6933 int ret = 0;
6934
6935 if (clp->cl_mvops->minor_version < 1)
6936 goto out;
6937 if (clp->cl_exchange_flags == 0)
6938 goto out;
05f4c350
CL		 6939 if (clp->cl_preserve_clid)
6940 goto out;
73d8bde5 6941 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6942 ret = nfs4_proc_destroy_clientid(clp, cred);
6943 if (cred)
6944 put_rpccred(cred);
6945 switch (ret) {
6946 case 0:
6947 case -NFS4ERR_STALE_CLIENTID:
6948 clp->cl_exchange_flags = 0;
6949 }
6950out:
6951 return ret;
6952}
6953
2050f0cc
AA		 6954struct nfs4_get_lease_time_data {
6955 struct nfs4_get_lease_time_args *args;
6956 struct nfs4_get_lease_time_res *res;
6957 struct nfs_client *clp;
6958};
6959
6960static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6961 void *calldata)
6962{
2050f0cc
AA		 6963 struct nfs4_get_lease_time_data *data =
6964 (struct nfs4_get_lease_time_data *)calldata;
6965
6966 dprintk("--> %s\n", __func__);
6967 /* just setup sequence, do not trigger session recovery
6968 since we're invoked within one */
d9afbd1b
TM		 6969 nfs41_setup_sequence(data->clp->cl_session,
6970 &data->args->la_seq_args,
6971 &data->res->lr_seq_res,
6972 task);
2050f0cc
AA		 6973 dprintk("<-- %s\n", __func__);
6974}
6975
6976/*
6977 * Called from nfs4_state_manager thread for session setup, so don't recover
6978 * from sequence operation or clientid errors.
6979 */
6980static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6981{
6982 struct nfs4_get_lease_time_data *data =
6983 (struct nfs4_get_lease_time_data *)calldata;
6984
6985 dprintk("--> %s\n", __func__);
14516c3a
TM		 6986 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6987 return;
2050f0cc
AA		 6988 switch (task->tk_status) {
6989 case -NFS4ERR_DELAY:
6990 case -NFS4ERR_GRACE:
6991 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6992 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6993 task->tk_status = 0;
a8a4ae3a
AA		 6994 /* fall through */
6995 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6996 rpc_restart_call_prepare(task);
2050f0cc
AA		 6997 return;
6998 }
2050f0cc
AA		 6999 dprintk("<-- %s\n", __func__);
7000}
7001
17280175 7002static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7003 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7004 .rpc_call_done = nfs4_get_lease_time_done,
7005};
7006
7007int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7008{
7009 struct rpc_task *task;
7010 struct nfs4_get_lease_time_args args;
7011 struct nfs4_get_lease_time_res res = {
7012 .lr_fsinfo = fsinfo,
7013 };
7014 struct nfs4_get_lease_time_data data = {
7015 .args = &args,
7016 .res = &res,
7017 .clp = clp,
7018 };
7019 struct rpc_message msg = {
7020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7021 .rpc_argp = &args,
7022 .rpc_resp = &res,
7023 };
7024 struct rpc_task_setup task_setup = {
7025 .rpc_client = clp->cl_rpcclient,
7026 .rpc_message = &msg,
7027 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7028 .callback_data = &data,
7029 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7030 };
7031 int status;
7032
a9c92d6b 7033 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7034 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7035 dprintk("--> %s\n", __func__);
7036 task = rpc_run_task(&task_setup);
7037
7038 if (IS_ERR(task))
7039 status = PTR_ERR(task);
7040 else {
7041 status = task->tk_status;
7042 rpc_put_task(task);
7043 }
7044 dprintk("<-- %s return %d\n", __func__, status);
7045
7046 return status;
7047}
7048
fc931582
AA		 7049/*
7050 * Initialize the values to be used by the client in CREATE_SESSION
7051 * If nfs4_init_session set the fore channel request and response sizes,
7052 * use them.
7053 *
7054 * Set the back channel max_resp_sz_cached to zero to force the client to
7055 * always set csa_cachethis to FALSE because the current implementation
7056 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7057 */
7058static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7059{
18aad3d5
AA		 7060 unsigned int max_rqst_sz, max_resp_sz;
7061
7062 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7063 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7064
fc931582 7065 /* Fore channel attributes */
18aad3d5
AA		 7066 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7067 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7068 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7069 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7070
7071 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7072 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7073 __func__,
7074 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7075 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7076
7077 /* Back channel attributes */
fc931582
AA		 7078 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7079 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7080 args->bc_attrs.max_resp_sz_cached = 0;
7081 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7082 args->bc_attrs.max_reqs = 1;
7083
7084 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7085 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7086 __func__,
7087 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7088 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7089 args->bc_attrs.max_reqs);
7090}
7091
43c2e885 7092static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7093{
43c2e885
BF		 7094 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7095 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7096
43c2e885
BF		 7097 if (rcvd->max_resp_sz > sent->max_resp_sz)
7098 return -EINVAL;
7099 /*
7100 * Our requested max_ops is the minimum we need; we're not
7101 * prepared to break up compounds into smaller pieces than that.
7102 * So, no point even trying to continue if the server won't
7103 * cooperate:
7104 */
7105 if (rcvd->max_ops < sent->max_ops)
7106 return -EINVAL;
7107 if (rcvd->max_reqs == 0)
7108 return -EINVAL;
b4b9a0c1
VG		 7109 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7110 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7111 return 0;
8d35301d
AA		 7112}
7113
43c2e885
BF		 7114static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7115{
7116 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7117 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7118
43c2e885
BF		 7119 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7120 return -EINVAL;
7121 if (rcvd->max_resp_sz < sent->max_resp_sz)
7122 return -EINVAL;
7123 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7124 return -EINVAL;
7125 /* These would render the backchannel useless: */
b4b9a0c1 7126 if (rcvd->max_ops != sent->max_ops)
43c2e885 7127 return -EINVAL;
b4b9a0c1 7128 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7129 return -EINVAL;
7130 return 0;
7131}
8d35301d 7132
8d35301d
AA		 7133static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7134 struct nfs4_session *session)
7135{
43c2e885 7136 int ret;
8d35301d 7137
43c2e885
BF		 7138 ret = nfs4_verify_fore_channel_attrs(args, session);
7139 if (ret)
7140 return ret;
7141 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7142}
7143
848f5bda
TM		 7144static int _nfs4_proc_create_session(struct nfs_client *clp,
7145 struct rpc_cred *cred)
fc931582
AA		 7146{
7147 struct nfs4_session *session = clp->cl_session;
7148 struct nfs41_create_session_args args = {
7149 .client = clp,
7150 .cb_program = NFS4_CALLBACK,
7151 };
7152 struct nfs41_create_session_res res = {
7153 .client = clp,
7154 };
7155 struct rpc_message msg = {
7156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7157 .rpc_argp = &args,
7158 .rpc_resp = &res,
848f5bda 7159 .rpc_cred = cred,
fc931582
AA		 7160 };
7161 int status;
7162
7163 nfs4_init_channel_attrs(&args);
0f91421e 7164 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7165
1bd714f2 7166 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7167 trace_nfs4_create_session(clp, status);
fc931582 7168
43095d39 7169 if (!status) {
8d35301d
AA		 7170 /* Verify the session's negotiated channel_attrs values */
7171 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7172 /* Increment the clientid slot sequence id */
7173 clp->cl_seqid++;
7174 }
7175
7176 return status;
7177}
7178
7179/*
7180 * Issues a CREATE_SESSION operation to the server.
7181 * It is the responsibility of the caller to verify the session is
7182 * expired before calling this routine.
7183 */
848f5bda 7184int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7185{
7186 int status;
7187 unsigned *ptr;
fc931582
AA		 7188 struct nfs4_session *session = clp->cl_session;
7189
7190 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7191
848f5bda 7192 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7193 if (status)
7194 goto out;
7195
aacd5537
AA		 7196 /* Init or reset the session slot tables */
7197 status = nfs4_setup_session_slot_tables(session);
7198 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7199 if (status)
7200 goto out;
7201
7202 ptr = (unsigned *)&session->sess_id.data[0];
7203 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7204 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7205out:
7206 dprintk("<-- %s\n", __func__);
7207 return status;
7208}
7209
0f3e66c6
AA		 7210/*
7211 * Issue the over-the-wire RPC DESTROY_SESSION.
7212 * The caller must serialize access to this routine.
7213 */
848f5bda
TM		 7214int nfs4_proc_destroy_session(struct nfs4_session *session,
7215 struct rpc_cred *cred)
0f3e66c6 7216{
848f5bda
TM		 7217 struct rpc_message msg = {
7218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7219 .rpc_argp = session,
7220 .rpc_cred = cred,
7221 };
0f3e66c6 7222 int status = 0;
0f3e66c6
AA		 7223
7224 dprintk("--> nfs4_proc_destroy_session\n");
7225
7226 /* session is still being setup */
7227 if (session->clp->cl_cons_state != NFS_CS_READY)
7228 return status;
7229
1bd714f2 7230 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7231 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7232
7233 if (status)
08106ac7 7234 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7235 "Session has been destroyed regardless...\n", status);
7236
7237 dprintk("<-- nfs4_proc_destroy_session\n");
7238 return status;
7239}
7240
fc01cea9
AA		 7241/*
7242 * Renew the cl_session lease.
7243 */
d5f8d3fe
TM		 7244struct nfs4_sequence_data {
7245 struct nfs_client *clp;
7246 struct nfs4_sequence_args args;
7247 struct nfs4_sequence_res res;
7248};
7249
dc96aef9
AB		 7250static void nfs41_sequence_release(void *data)
7251{
d5f8d3fe
TM		 7252 struct nfs4_sequence_data *calldata = data;
7253 struct nfs_client *clp = calldata->clp;
dc96aef9 7254
7135840f
AB		 7255 if (atomic_read(&clp->cl_count) > 1)
7256 nfs4_schedule_state_renewal(clp);
7257 nfs_put_client(clp);
d5f8d3fe 7258 kfree(calldata);
dc96aef9
AB		 7259}
7260
aa5190d0
TM		 7261static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7262{
7263 switch(task->tk_status) {
7264 case -NFS4ERR_DELAY:
aa5190d0
TM		 7265 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7266 return -EAGAIN;
7267 default:
0400a6b0 7268 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7269 }
7270 return 0;
7271}
7272
dc96aef9 7273static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7274{
d5f8d3fe
TM		 7275 struct nfs4_sequence_data *calldata = data;
7276 struct nfs_client *clp = calldata->clp;
fc01cea9 7277
14516c3a
TM		 7278 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7279 return;
fc01cea9 7280
c6d01c6f 7281 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7282 if (task->tk_status < 0) {
7283 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7284 if (atomic_read(&clp->cl_count) == 1)
7285 goto out;
fc01cea9 7286
aa5190d0
TM		 7287 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7288 rpc_restart_call_prepare(task);
fc01cea9
AA		 7289 return;
7290 }
7291 }
fc01cea9 7292 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7293out:
fc01cea9
AA		 7294 dprintk("<-- %s\n", __func__);
7295}
7296
7297static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7298{
d5f8d3fe
TM		 7299 struct nfs4_sequence_data *calldata = data;
7300 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7301 struct nfs4_sequence_args *args;
7302 struct nfs4_sequence_res *res;
7303
fc01cea9
AA		 7304 args = task->tk_msg.rpc_argp;
7305 res = task->tk_msg.rpc_resp;
7306
d9afbd1b 7307 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7308}
7309
7310static const struct rpc_call_ops nfs41_sequence_ops = {
7311 .rpc_call_done = nfs41_sequence_call_done,
7312 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7313 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7314};
7315
8fe72bac
TM		 7316static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7317 struct rpc_cred *cred,
7318 bool is_privileged)
fc01cea9 7319{
d5f8d3fe 7320 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7321 struct rpc_message msg = {
7322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7323 .rpc_cred = cred,
7324 };
71ac6da9
TM		 7325 struct rpc_task_setup task_setup_data = {
7326 .rpc_client = clp->cl_rpcclient,
7327 .rpc_message = &msg,
8fe72bac 7328 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7329 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7330 };
fc01cea9 7331
7135840f 7332 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7333 return ERR_PTR(-EIO);
dfb4f309 7334 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7335 if (calldata == NULL) {
7135840f 7336 nfs_put_client(clp);
71ac6da9 7337 return ERR_PTR(-ENOMEM);
fc01cea9 7338 }
a9c92d6b 7339 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7340 if (is_privileged)
7341 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7342 msg.rpc_argp = &calldata->args;
7343 msg.rpc_resp = &calldata->res;
7344 calldata->clp = clp;
71ac6da9 7345 task_setup_data.callback_data = calldata;
fc01cea9 7346
71ac6da9
TM		 7347 return rpc_run_task(&task_setup_data);
7348}
7349
2f60ea6b 7350static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7351{
7352 struct rpc_task *task;
7353 int ret = 0;
7354
2f60ea6b
TM		 7355 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7356 return 0;
8fe72bac 7357 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7358 if (IS_ERR(task))
7359 ret = PTR_ERR(task);
7360 else
bf294b41 7361 rpc_put_task_async(task);
71ac6da9
TM		 7362 dprintk("<-- %s status=%d\n", __func__, ret);
7363 return ret;
7364}
7365
7366static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7367{
7368 struct rpc_task *task;
7369 int ret;
7370
8fe72bac 7371 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7372 if (IS_ERR(task)) {
7373 ret = PTR_ERR(task);
7374 goto out;
7375 }
7376 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7377 if (!ret) {
7378 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7379
7380 if (task->tk_status == 0)
7381 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7382 ret = task->tk_status;
b4410c2f 7383 }
71ac6da9
TM		 7384 rpc_put_task(task);
7385out:
7386 dprintk("<-- %s status=%d\n", __func__, ret);
7387 return ret;
fc01cea9
AA		 7388}
7389
fce5c838
RL		 7390struct nfs4_reclaim_complete_data {
7391 struct nfs_client *clp;
7392 struct nfs41_reclaim_complete_args arg;
7393 struct nfs41_reclaim_complete_res res;
7394};
7395
7396static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7397{
7398 struct nfs4_reclaim_complete_data *calldata = data;
7399
d9afbd1b
TM		 7400 nfs41_setup_sequence(calldata->clp->cl_session,
7401 &calldata->arg.seq_args,
7402 &calldata->res.seq_res,
7403 task);
fce5c838
RL		 7404}
7405
aa5190d0
TM		 7406static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7407{
7408 switch(task->tk_status) {
7409 case 0:
7410 case -NFS4ERR_COMPLETE_ALREADY:
7411 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7412 break;
7413 case -NFS4ERR_DELAY:
aa5190d0 7414 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7415 /* fall through */
7416 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7417 return -EAGAIN;
7418 default:
0400a6b0 7419 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7420 }
7421 return 0;
7422}
7423
fce5c838
RL		 7424static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7425{
7426 struct nfs4_reclaim_complete_data *calldata = data;
7427 struct nfs_client *clp = calldata->clp;
7428 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7429
7430 dprintk("--> %s\n", __func__);
14516c3a
TM		 7431 if (!nfs41_sequence_done(task, res))
7432 return;
fce5c838 7433
c6d01c6f 7434 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7435 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7436 rpc_restart_call_prepare(task);
7437 return;
7438 }
fce5c838
RL		 7439 dprintk("<-- %s\n", __func__);
7440}
7441
7442static void nfs4_free_reclaim_complete_data(void *data)
7443{
7444 struct nfs4_reclaim_complete_data *calldata = data;
7445
7446 kfree(calldata);
7447}
7448
7449static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7450 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7451 .rpc_call_done = nfs4_reclaim_complete_done,
7452 .rpc_release = nfs4_free_reclaim_complete_data,
7453};
7454
7455/*
7456 * Issue a global reclaim complete.
7457 */
965e9c23
TM		 7458static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7459 struct rpc_cred *cred)
fce5c838
RL		 7460{
7461 struct nfs4_reclaim_complete_data *calldata;
7462 struct rpc_task *task;
7463 struct rpc_message msg = {
7464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7465 .rpc_cred = cred,
fce5c838
RL		 7466 };
7467 struct rpc_task_setup task_setup_data = {
7468 .rpc_client = clp->cl_rpcclient,
7469 .rpc_message = &msg,
7470 .callback_ops = &nfs4_reclaim_complete_call_ops,
7471 .flags = RPC_TASK_ASYNC,
7472 };
7473 int status = -ENOMEM;
7474
7475 dprintk("--> %s\n", __func__);
8535b2be 7476 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7477 if (calldata == NULL)
7478 goto out;
7479 calldata->clp = clp;
7480 calldata->arg.one_fs = 0;
fce5c838 7481
a9c92d6b 7482 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7483 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7484 msg.rpc_argp = &calldata->arg;
7485 msg.rpc_resp = &calldata->res;
7486 task_setup_data.callback_data = calldata;
7487 task = rpc_run_task(&task_setup_data);
acf82b85 7488 if (IS_ERR(task)) {
fce5c838 7489 status = PTR_ERR(task);
acf82b85
DC		 7490 goto out;
7491 }
c34c32ea
AA		 7492 status = nfs4_wait_for_completion_rpc_task(task);
7493 if (status == 0)
7494 status = task->tk_status;
fce5c838 7495 rpc_put_task(task);
acf82b85 7496 return 0;
fce5c838
RL		 7497out:
7498 dprintk("<-- %s status=%d\n", __func__, status);
7499 return status;
7500}
b1f69b75
AA		 7501
7502static void
7503nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7504{
7505 struct nfs4_layoutget *lgp = calldata;
c31663d4 7506 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7507 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7508
7509 dprintk("--> %s\n", __func__);
c31663d4
FI		 7510 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7511 * right now covering the LAYOUTGET we are about to send.
7512 * However, that is not so catastrophic, and there seems
7513 * to be no way to prevent it completely.
7514 */
6ba7db34 7515 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7516 &lgp->res.seq_res, task))
b1f69b75 7517 return;
cf7d63f1
FI		 7518 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7519 NFS_I(lgp->args.inode)->layout,
7520 lgp->args.ctx->state)) {
7521 rpc_exit(task, NFS4_OK);
cf7d63f1 7522 }
b1f69b75
AA		 7523}
7524
7525static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7526{
7527 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7528 struct inode *inode = lgp->args.inode;
7529 struct nfs_server *server = NFS_SERVER(inode);
7530 struct pnfs_layout_hdr *lo;
7531 struct nfs4_state *state = NULL;
ed7e5423 7532 unsigned long timeo, now, giveup;
b1f69b75 7533
ed7e5423 7534 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7535
6ba7db34 7536 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7537 goto out;
b1f69b75
AA		 7538
7539 switch (task->tk_status) {
7540 case 0:
ee314c2a 7541 goto out;
ed7e5423
BH		 7542 /*
7543 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7544 * (or clients) writing to the same RAID stripe
7545 */
b1f69b75 7546 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7547 /*
7548 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7549 * existing layout before getting a new one).
7550 */
b1f69b75 7551 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7552 timeo = rpc_get_timeout(task->tk_client);
7553 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7554 now = jiffies;
7555 if (time_after(giveup, now)) {
7556 unsigned long delay;
7557
7558 /* Delay for:
7559 * - Not less then NFS4_POLL_RETRY_MIN.
7560 * - One last time a jiffie before we give up
7561 * - exponential backoff (time_now minus start_attempt)
7562 */
7563 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7564 min((giveup - now - 1),
7565 now - lgp->args.timestamp));
7566
7567 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7568 __func__, delay);
7569 rpc_delay(task, delay);
7570 task->tk_status = 0;
7571 rpc_restart_call_prepare(task);
7572 goto out; /* Do not call nfs4_async_handle_error() */
7573 }
ee314c2a
TM		 7574 break;
7575 case -NFS4ERR_EXPIRED:
7576 case -NFS4ERR_BAD_STATEID:
7577 spin_lock(&inode->i_lock);
7578 lo = NFS_I(inode)->layout;
7579 if (!lo || list_empty(&lo->plh_segs)) {
7580 spin_unlock(&inode->i_lock);
7581 /* If the open stateid was bad, then recover it. */
7582 state = lgp->args.ctx->state;
7583 } else {
7584 LIST_HEAD(head);
7585
7586 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7587 spin_unlock(&inode->i_lock);
7588 /* Mark the bad layout state as invalid, then
7589 * retry using the open stateid. */
7590 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7591 }
7592 }
ee314c2a
TM		 7593 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7594 rpc_restart_call_prepare(task);
7595out:
b1f69b75
AA		 7596 dprintk("<-- %s\n", __func__);
7597}
7598
8554116e
IK		 7599static size_t max_response_pages(struct nfs_server *server)
7600{
7601 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7602 return nfs_page_array_len(0, max_resp_sz);
7603}
7604
7605static void nfs4_free_pages(struct page **pages, size_t size)
7606{
7607 int i;
7608
7609 if (!pages)
7610 return;
7611
7612 for (i = 0; i < size; i++) {
7613 if (!pages[i])
7614 break;
7615 __free_page(pages[i]);
7616 }
7617 kfree(pages);
7618}
7619
7620static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7621{
7622 struct page **pages;
7623 int i;
7624
7625 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7626 if (!pages) {
7627 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7628 return NULL;
7629 }
7630
7631 for (i = 0; i < size; i++) {
7632 pages[i] = alloc_page(gfp_flags);
7633 if (!pages[i]) {
7634 dprintk("%s: failed to allocate page\n", __func__);
7635 nfs4_free_pages(pages, size);
7636 return NULL;
7637 }
7638 }
7639
7640 return pages;
7641}
7642
b1f69b75
AA		 7643static void nfs4_layoutget_release(void *calldata)
7644{
7645 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7646 struct inode *inode = lgp->args.inode;
7647 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7648 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7649
7650 dprintk("--> %s\n", __func__);
8554116e 7651 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7652 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7653 put_nfs_open_context(lgp->args.ctx);
7654 kfree(calldata);
7655 dprintk("<-- %s\n", __func__);
7656}
7657
7658static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7659 .rpc_call_prepare = nfs4_layoutget_prepare,
7660 .rpc_call_done = nfs4_layoutget_done,
7661 .rpc_release = nfs4_layoutget_release,
7662};
7663
a0b0a6e3
TM		 7664struct pnfs_layout_segment *
7665nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7666{
a47970ff
WAA		 7667 struct inode *inode = lgp->args.inode;
7668 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7669 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7670 struct rpc_task *task;
7671 struct rpc_message msg = {
7672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7673 .rpc_argp = &lgp->args,
7674 .rpc_resp = &lgp->res,
6ab59344 7675 .rpc_cred = lgp->cred,
b1f69b75
AA		 7676 };
7677 struct rpc_task_setup task_setup_data = {
7678 .rpc_client = server->client,
7679 .rpc_message = &msg,
7680 .callback_ops = &nfs4_layoutget_call_ops,
7681 .callback_data = lgp,
7682 .flags = RPC_TASK_ASYNC,
7683 };
a0b0a6e3 7684 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7685 int status = 0;
7686
7687 dprintk("--> %s\n", __func__);
7688
8554116e
IK		 7689 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7690 if (!lgp->args.layout.pages) {
7691 nfs4_layoutget_release(lgp);
a0b0a6e3 7692 return ERR_PTR(-ENOMEM);
8554116e
IK		 7693 }
7694 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7695 lgp->args.timestamp = jiffies;
8554116e 7696
35124a09 7697 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7698 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7699 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7700
7701 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7702 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7703
b1f69b75
AA		 7704 task = rpc_run_task(&task_setup_data);
7705 if (IS_ERR(task))
a0b0a6e3 7706 return ERR_CAST(task);
b1f69b75 7707 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7708 if (status == 0)
7709 status = task->tk_status;
1037e6ea
TM		 7710 trace_nfs4_layoutget(lgp->args.ctx,
7711 &lgp->args.range,
7712 &lgp->res.range,
7713 status);
085b7a45
WAA		 7714 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7715 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7716 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7717 rpc_put_task(task);
7718 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7719 if (status)
7720 return ERR_PTR(status);
7721 return lseg;
b1f69b75
AA		 7722}
7723
cbe82603
BH		 7724static void
7725nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7726{
7727 struct nfs4_layoutreturn *lrp = calldata;
7728
7729 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7730 nfs41_setup_sequence(lrp->clp->cl_session,
7731 &lrp->args.seq_args,
7732 &lrp->res.seq_res,
7733 task);
cbe82603
BH		 7734}
7735
7736static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7737{
7738 struct nfs4_layoutreturn *lrp = calldata;
7739 struct nfs_server *server;
7740
7741 dprintk("--> %s\n", __func__);
7742
6ba7db34 7743 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7744 return;
7745
7746 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7747 switch (task->tk_status) {
7748 default:
7749 task->tk_status = 0;
7750 case 0:
7751 break;
7752 case -NFS4ERR_DELAY:
7753 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN)
7754 break;
d00c5d43 7755 rpc_restart_call_prepare(task);
cbe82603
BH		 7756 return;
7757 }
cbe82603
BH		 7758 dprintk("<-- %s\n", __func__);
7759}
7760
7761static void nfs4_layoutreturn_release(void *calldata)
7762{
7763 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7764 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7765
7766 dprintk("--> %s\n", __func__);
849b286f
TM		 7767 spin_lock(&lo->plh_inode->i_lock);
7768 if (lrp->res.lrs_present)
7769 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7770 lo->plh_block_lgets--;
7771 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7772 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7773 kfree(calldata);
7774 dprintk("<-- %s\n", __func__);
7775}
7776
7777static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7778 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7779 .rpc_call_done = nfs4_layoutreturn_done,
7780 .rpc_release = nfs4_layoutreturn_release,
7781};
7782
7783int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7784{
7785 struct rpc_task *task;
7786 struct rpc_message msg = {
7787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7788 .rpc_argp = &lrp->args,
7789 .rpc_resp = &lrp->res,
9556000d 7790 .rpc_cred = lrp->cred,
cbe82603
BH		 7791 };
7792 struct rpc_task_setup task_setup_data = {
1771c577 7793 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7794 .rpc_message = &msg,
7795 .callback_ops = &nfs4_layoutreturn_call_ops,
7796 .callback_data = lrp,
7797 };
7798 int status;
7799
7800 dprintk("--> %s\n", __func__);
a9c92d6b 7801 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7802 task = rpc_run_task(&task_setup_data);
7803 if (IS_ERR(task))
7804 return PTR_ERR(task);
7805 status = task->tk_status;
1037e6ea 7806 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7807 dprintk("<-- %s status=%d\n", __func__, status);
7808 rpc_put_task(task);
7809 return status;
7810}
7811
7f11d8d3
AA		 7812/*
7813 * Retrieve the list of Data Server devices from the MDS.
7814 */
7815static int _nfs4_getdevicelist(struct nfs_server *server,
7816 const struct nfs_fh *fh,
7817 struct pnfs_devicelist *devlist)
7818{
7819 struct nfs4_getdevicelist_args args = {
7820 .fh = fh,
7821 .layoutclass = server->pnfs_curr_ld->id,
7822 };
7823 struct nfs4_getdevicelist_res res = {
7824 .devlist = devlist,
7825 };
7826 struct rpc_message msg = {
7827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7828 .rpc_argp = &args,
7829 .rpc_resp = &res,
7830 };
7831 int status;
7832
7833 dprintk("--> %s\n", __func__);
7834 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7835 &res.seq_res, 0);
7836 dprintk("<-- %s status=%d\n", __func__, status);
7837 return status;
7838}
7839
7840int nfs4_proc_getdevicelist(struct nfs_server *server,
7841 const struct nfs_fh *fh,
7842 struct pnfs_devicelist *devlist)
7843{
7844 struct nfs4_exception exception = { };
7845 int err;
7846
7847 do {
7848 err = nfs4_handle_exception(server,
7849 _nfs4_getdevicelist(server, fh, devlist),
7850 &exception);
7851 } while (exception.retry);
7852
7853 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7854 err, devlist->num_devs);
7855
7856 return err;
7857}
7858EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7859
b1f69b75 7860static int
cd5875fe
TM		 7861_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7862 struct pnfs_device *pdev,
7863 struct rpc_cred *cred)
b1f69b75
AA		 7864{
7865 struct nfs4_getdeviceinfo_args args = {
7866 .pdev = pdev,
7867 };
7868 struct nfs4_getdeviceinfo_res res = {
7869 .pdev = pdev,
7870 };
7871 struct rpc_message msg = {
7872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7873 .rpc_argp = &args,
7874 .rpc_resp = &res,
cd5875fe 7875 .rpc_cred = cred,
b1f69b75
AA		 7876 };
7877 int status;
7878
7879 dprintk("--> %s\n", __func__);
7c513058 7880 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7881 dprintk("<-- %s status=%d\n", __func__, status);
7882
7883 return status;
7884}
7885
cd5875fe
TM		 7886int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7887 struct pnfs_device *pdev,
7888 struct rpc_cred *cred)
b1f69b75
AA		 7889{
7890 struct nfs4_exception exception = { };
7891 int err;
7892
7893 do {
7894 err = nfs4_handle_exception(server,
cd5875fe 7895 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7896 &exception);
7897 } while (exception.retry);
7898 return err;
7899}
7900EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7901
863a3c6c
AA		 7902static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7903{
7904 struct nfs4_layoutcommit_data *data = calldata;
7905 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7906 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7907
d9afbd1b
TM		 7908 nfs41_setup_sequence(session,
7909 &data->args.seq_args,
7910 &data->res.seq_res,
7911 task);
863a3c6c
AA		 7912}
7913
7914static void
7915nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7916{
7917 struct nfs4_layoutcommit_data *data = calldata;
7918 struct nfs_server *server = NFS_SERVER(data->args.inode);
7919
6ba7db34 7920 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7921 return;
7922
7923 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7924 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7925 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7926 case -NFS4ERR_BADLAYOUT: /* no layout */
7927 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7928 task->tk_status = 0;
e59d27e0 7929 case 0:
e59d27e0
TM		 7930 break;
7931 default:
7932 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7933 rpc_restart_call_prepare(task);
7934 return;
7935 }
7936 }
863a3c6c
AA		 7937}
7938
7939static void nfs4_layoutcommit_release(void *calldata)
7940{
7941 struct nfs4_layoutcommit_data *data = calldata;
7942
db29c089 7943 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7944 nfs_post_op_update_inode_force_wcc(data->args.inode,
7945 data->res.fattr);
863a3c6c
AA		 7946 put_rpccred(data->cred);
7947 kfree(data);
7948}
7949
7950static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7951 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7952 .rpc_call_done = nfs4_layoutcommit_done,
7953 .rpc_release = nfs4_layoutcommit_release,
7954};
7955
7956int
ef311537 7957nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7958{
7959 struct rpc_message msg = {
7960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7961 .rpc_argp = &data->args,
7962 .rpc_resp = &data->res,
7963 .rpc_cred = data->cred,
7964 };
7965 struct rpc_task_setup task_setup_data = {
7966 .task = &data->task,
7967 .rpc_client = NFS_CLIENT(data->args.inode),
7968 .rpc_message = &msg,
7969 .callback_ops = &nfs4_layoutcommit_ops,
7970 .callback_data = data,
7971 .flags = RPC_TASK_ASYNC,
7972 };
7973 struct rpc_task *task;
7974 int status = 0;
7975
7976 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7977 "lbw: %llu inode %lu\n",
7978 data->task.tk_pid, sync,
7979 data->args.lastbytewritten,
7980 data->args.inode->i_ino);
7981
a9c92d6b 7982 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7983 task = rpc_run_task(&task_setup_data);
7984 if (IS_ERR(task))
7985 return PTR_ERR(task);
ef311537 7986 if (sync == false)
863a3c6c
AA		 7987 goto out;
7988 status = nfs4_wait_for_completion_rpc_task(task);
7989 if (status != 0)
7990 goto out;
7991 status = task->tk_status;
1037e6ea 7992 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7993out:
7994 dprintk("%s: status %d\n", __func__, status);
7995 rpc_put_task(task);
7996 return status;
7997}
fca78d6d 7998
97431204
AA		 7999/**
8000 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8001 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8002 */
fca78d6d
BS		 8003static int
8004_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8005 struct nfs_fsinfo *info,
8006 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8007{
8008 struct nfs41_secinfo_no_name_args args = {
8009 .style = SECINFO_STYLE_CURRENT_FH,
8010 };
8011 struct nfs4_secinfo_res res = {
8012 .flavors = flavors,
8013 };
8014 struct rpc_message msg = {
8015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8016 .rpc_argp = &args,
8017 .rpc_resp = &res,
8018 };
b1b3e136 8019 struct rpc_clnt *clnt = server->client;
7cb852df 8020 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8021 int status;
8022
8023 if (use_integrity) {
8024 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8025 cred = nfs4_get_clid_cred(server->nfs_client);
8026 msg.rpc_cred = cred;
b1b3e136
WAA		 8027 }
8028
8029 dprintk("--> %s\n", __func__);
8030 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8031 &res.seq_res, 0);
8032 dprintk("<-- %s status=%d\n", __func__, status);
8033
7cb852df
WAA		 8034 if (cred)
8035 put_rpccred(cred);
b1b3e136
WAA		 8036
8037 return status;
fca78d6d
BS		 8038}
8039
8040static int
8041nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8042 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8043{
8044 struct nfs4_exception exception = { };
8045 int err;
8046 do {
b1b3e136
WAA		 8047 /* first try using integrity protection */
8048 err = -NFS4ERR_WRONGSEC;
8049
8050 /* try to use integrity protection with machine cred */
8051 if (_nfs4_is_integrity_protected(server->nfs_client))
8052 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8053 flavors, true);
8054
8055 /*
8056 * if unable to use integrity protection, or SECINFO with
8057 * integrity protection returns NFS4ERR_WRONGSEC (which is
8058 * disallowed by spec, but exists in deployed servers) use
8059 * the current filesystem's rpc_client and the user cred.
8060 */
8061 if (err == -NFS4ERR_WRONGSEC)
8062 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8063 flavors, false);
8064
fca78d6d
BS		 8065 switch (err) {
8066 case 0:
8067 case -NFS4ERR_WRONGSEC:
78b19bae 8068 case -ENOTSUPP:
05e9cfb4 8069 goto out;
fca78d6d
BS		 8070 default:
8071 err = nfs4_handle_exception(server, err, &exception);
8072 }
8073 } while (exception.retry);
05e9cfb4 8074out:
fca78d6d
BS		 8075 return err;
8076}
8077
8078static int
8079nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8080 struct nfs_fsinfo *info)
8081{
8082 int err;
8083 struct page *page;
367156d9 8084 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8085 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8086 struct nfs4_secinfo4 *secinfo;
8087 int i;
fca78d6d
BS		 8088
8089 page = alloc_page(GFP_KERNEL);
8090 if (!page) {
8091 err = -ENOMEM;
8092 goto out;
8093 }
8094
8095 flavors = page_address(page);
8096 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8097
8098 /*
8099 * Fall back on "guess and check" method if
8100 * the server doesn't support SECINFO_NO_NAME
8101 */
78b19bae 8102 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8103 err = nfs4_find_root_sec(server, fhandle, info);
8104 goto out_freepage;
8105 }
8106 if (err)
8107 goto out_freepage;
8108
58a8cf12
WAA		 8109 for (i = 0; i < flavors->num_flavors; i++) {
8110 secinfo = &flavors->flavors[i];
8111
8112 switch (secinfo->flavor) {
8113 case RPC_AUTH_NULL:
8114 case RPC_AUTH_UNIX:
8115 case RPC_AUTH_GSS:
8116 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8117 &secinfo->flavor_info);
8118 break;
8119 default:
8120 flavor = RPC_AUTH_MAXFLAVOR;
8121 break;
8122 }
8123
4d4b69dd
WAA		 8124 if (!nfs_auth_info_match(&server->auth_info, flavor))
8125 flavor = RPC_AUTH_MAXFLAVOR;
8126
58a8cf12
WAA		 8127 if (flavor != RPC_AUTH_MAXFLAVOR) {
8128 err = nfs4_lookup_root_sec(server, fhandle,
8129 info, flavor);
8130 if (!err)
8131 break;
8132 }
8133 }
8134
8135 if (flavor == RPC_AUTH_MAXFLAVOR)
8136 err = -EPERM;
fca78d6d
BS		 8137
8138out_freepage:
8139 put_page(page);
8140 if (err == -EACCES)
8141 return -EPERM;
8142out:
8143 return err;
8144}
1cab0652 8145
ab7cb0df
TM		 8146static int _nfs41_test_stateid(struct nfs_server *server,
8147 nfs4_stateid *stateid,
8148 struct rpc_cred *cred)
7d974794
BS		 8149{
8150 int status;
8151 struct nfs41_test_stateid_args args = {
1cab0652 8152 .stateid = stateid,
7d974794
BS		 8153 };
8154 struct nfs41_test_stateid_res res;
8155 struct rpc_message msg = {
8156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8157 .rpc_argp = &args,
8158 .rpc_resp = &res,
ab7cb0df 8159 .rpc_cred = cred,
7d974794 8160 };
3787d506
WAA		 8161 struct rpc_clnt *rpc_client = server->client;
8162
8163 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8164 &rpc_client, &msg);
1cab0652 8165
38527b15 8166 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8167 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8168 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8169 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8170 &args.seq_args, &res.seq_res);
38527b15
CL		 8171 if (status != NFS_OK) {
8172 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8173 return status;
38527b15
CL		 8174 }
8175 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8176 return -res.status;
7d974794
BS		 8177}
8178
38527b15
CL		 8179/**
8180 * nfs41_test_stateid - perform a TEST_STATEID operation
8181 *
8182 * @server: server / transport on which to perform the operation
8183 * @stateid: state ID to test
ab7cb0df 8184 * @cred: credential
38527b15
CL		 8185 *
8186 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8187 * Otherwise a negative NFS4ERR value is returned if the operation
8188 * failed or the state ID is not currently valid.
8189 */
ab7cb0df
TM		 8190static int nfs41_test_stateid(struct nfs_server *server,
8191 nfs4_stateid *stateid,
8192 struct rpc_cred *cred)
7d974794
BS		 8193{
8194 struct nfs4_exception exception = { };
8195 int err;
8196 do {
ab7cb0df 8197 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8198 if (err != -NFS4ERR_DELAY)
8199 break;
8200 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8201 } while (exception.retry);
8202 return err;
8203}
9aeda35f 8204
7c1d5fae
TM		 8205struct nfs_free_stateid_data {
8206 struct nfs_server *server;
8207 struct nfs41_free_stateid_args args;
9aeda35f 8208 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8209};
8210
8211static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8212{
8213 struct nfs_free_stateid_data *data = calldata;
8214 nfs41_setup_sequence(nfs4_get_session(data->server),
8215 &data->args.seq_args,
8216 &data->res.seq_res,
8217 task);
8218}
8219
8220static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8221{
8222 struct nfs_free_stateid_data *data = calldata;
8223
8224 nfs41_sequence_done(task, &data->res.seq_res);
8225
8226 switch (task->tk_status) {
8227 case -NFS4ERR_DELAY:
8228 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8229 rpc_restart_call_prepare(task);
8230 }
8231}
8232
8233static void nfs41_free_stateid_release(void *calldata)
8234{
8235 kfree(calldata);
8236}
8237
17f26b12 8238static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8239 .rpc_call_prepare = nfs41_free_stateid_prepare,
8240 .rpc_call_done = nfs41_free_stateid_done,
8241 .rpc_release = nfs41_free_stateid_release,
8242};
8243
8244static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8245 nfs4_stateid *stateid,
ab7cb0df 8246 struct rpc_cred *cred,
7c1d5fae
TM		 8247 bool privileged)
8248{
9aeda35f
BS		 8249 struct rpc_message msg = {
8250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8251 .rpc_cred = cred,
9aeda35f 8252 };
7c1d5fae
TM		 8253 struct rpc_task_setup task_setup = {
8254 .rpc_client = server->client,
8255 .rpc_message = &msg,
8256 .callback_ops = &nfs41_free_stateid_ops,
8257 .flags = RPC_TASK_ASYNC,
8258 };
8259 struct nfs_free_stateid_data *data;
9aeda35f 8260
3787d506
WAA		 8261 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8262 &task_setup.rpc_client, &msg);
8263
38527b15 8264 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8265 data = kmalloc(sizeof(*data), GFP_NOFS);
8266 if (!data)
8267 return ERR_PTR(-ENOMEM);
8268 data->server = server;
8269 nfs4_stateid_copy(&data->args.stateid, stateid);
8270
8271 task_setup.callback_data = data;
8272
8273 msg.rpc_argp = &data->args;
8274 msg.rpc_resp = &data->res;
a9c92d6b 8275 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8276 if (privileged)
8277 nfs4_set_sequence_privileged(&data->args.seq_args);
8278
8279 return rpc_run_task(&task_setup);
9aeda35f
BS		 8280}
8281
38527b15
CL		 8282/**
8283 * nfs41_free_stateid - perform a FREE_STATEID operation
8284 *
8285 * @server: server / transport on which to perform the operation
8286 * @stateid: state ID to release
ab7cb0df 8287 * @cred: credential
38527b15
CL		 8288 *
8289 * Returns NFS_OK if the server freed "stateid". Otherwise a
8290 * negative NFS4ERR value is returned.
8291 */
ab7cb0df
TM		 8292static int nfs41_free_stateid(struct nfs_server *server,
8293 nfs4_stateid *stateid,
8294 struct rpc_cred *cred)
9aeda35f 8295{
7c1d5fae
TM		 8296 struct rpc_task *task;
8297 int ret;
8298
ab7cb0df 8299 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8300 if (IS_ERR(task))
8301 return PTR_ERR(task);
8302 ret = rpc_wait_for_completion_task(task);
8303 if (!ret)
8304 ret = task->tk_status;
8305 rpc_put_task(task);
8306 return ret;
9aeda35f 8307}
36281caa 8308
f1cdae87
JL		 8309static void
8310nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8311{
8312 struct rpc_task *task;
ab7cb0df 8313 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8314
ab7cb0df 8315 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8316 nfs4_free_lock_state(server, lsp);
8317 if (IS_ERR(task))
f1cdae87 8318 return;
c8b2d0bf 8319 rpc_put_task(task);
c8b2d0bf
TM		 8320}
8321
36281caa
TM		 8322static bool nfs41_match_stateid(const nfs4_stateid *s1,
8323 const nfs4_stateid *s2)
8324{
2d2f24ad 8325 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8326 return false;
8327
2d2f24ad 8328 if (s1->seqid == s2->seqid)
36281caa 8329 return true;
2d2f24ad 8330 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8331 return true;
8332
8333 return false;
8334}
8335
557134a3
AA		 8336#endif /* CONFIG_NFS_V4_1 */
8337
36281caa
TM		 8338static bool nfs4_match_stateid(const nfs4_stateid *s1,
8339 const nfs4_stateid *s2)
8340{
f597c537 8341 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8342}
8343
8344
17280175 8345static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8346 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8347 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8348 .recover_open = nfs4_open_reclaim,
8349 .recover_lock = nfs4_lock_reclaim,
591d71cb 8350 .establish_clid = nfs4_init_clientid,
05f4c350 8351 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8352};
8353
591d71cb 8354#if defined(CONFIG_NFS_V4_1)
17280175 8355static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8356 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8357 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8358 .recover_open = nfs4_open_reclaim,
8359 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8360 .establish_clid = nfs41_init_clientid,
fce5c838 8361 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8362 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8363};
8364#endif /* CONFIG_NFS_V4_1 */
8365
17280175 8366static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8367 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8368 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8369 .recover_open = nfs4_open_expired,
8370 .recover_lock = nfs4_lock_expired,
8371 .establish_clid = nfs4_init_clientid,
8372};
8373
8374#if defined(CONFIG_NFS_V4_1)
17280175 8375static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8376 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8377 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8378 .recover_open = nfs41_open_expired,
8379 .recover_lock = nfs41_lock_expired,
4d643d1d 8380 .establish_clid = nfs41_init_clientid,
1da177e4 8381};
591d71cb 8382#endif /* CONFIG_NFS_V4_1 */
1da177e4 8383
17280175 8384static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8385 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8386 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8387 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8388};
8389
8390#if defined(CONFIG_NFS_V4_1)
17280175 8391static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8392 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8393 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8394 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8395};
8396#endif
8397
ec011fe8 8398static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8399 .get_locations = _nfs40_proc_get_locations,
44c99933 8400 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8401};
8402
8403#if defined(CONFIG_NFS_V4_1)
8404static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8405 .get_locations = _nfs41_proc_get_locations,
44c99933 8406 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8407};
8408#endif /* CONFIG_NFS_V4_1 */
8409
97dc1359
TM		 8410static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8411 .minor_version = 0,
39c6daae
TM		 8412 .init_caps = NFS_CAP_READDIRPLUS
8413 | NFS_CAP_ATOMIC_OPEN
8414 | NFS_CAP_CHANGE_ATTR
8415 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8416 .init_client = nfs40_init_client,
8417 .shutdown_client = nfs40_shutdown_client,
36281caa 8418 .match_stateid = nfs4_match_stateid,
fca78d6d 8419 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8420 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8421 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8422 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8423 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8424 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8425 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8426};
8427
8428#if defined(CONFIG_NFS_V4_1)
8429static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8430 .minor_version = 1,
39c6daae
TM		 8431 .init_caps = NFS_CAP_READDIRPLUS
8432 | NFS_CAP_ATOMIC_OPEN
8433 | NFS_CAP_CHANGE_ATTR
3b66486c 8434 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8435 | NFS_CAP_STATEID_NFSV41
8436 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8437 .init_client = nfs41_init_client,
8438 .shutdown_client = nfs41_shutdown_client,
36281caa 8439 .match_stateid = nfs41_match_stateid,
fca78d6d 8440 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8441 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8442 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8443 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8444 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8445 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8446 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8447};
8448#endif
8449
42c2c424
SD		 8450#if defined(CONFIG_NFS_V4_2)
8451static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8452 .minor_version = 2,
7017310a
BS		 8453 .init_caps = NFS_CAP_READDIRPLUS
8454 | NFS_CAP_ATOMIC_OPEN
8455 | NFS_CAP_CHANGE_ATTR
8456 | NFS_CAP_POSIX_LOCK
8457 | NFS_CAP_STATEID_NFSV41
8458 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8459 .init_client = nfs41_init_client,
8460 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8461 .match_stateid = nfs41_match_stateid,
8462 .find_root_sec = nfs41_find_root_sec,
7017310a 8463 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8464 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8465 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8466 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8467 .state_renewal_ops = &nfs41_state_renewal_ops,
8468};
8469#endif
8470
97dc1359
TM		 8471const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8472 [0] = &nfs_v4_0_minor_ops,
8473#if defined(CONFIG_NFS_V4_1)
8474 [1] = &nfs_v4_1_minor_ops,
8475#endif
42c2c424
SD		 8476#if defined(CONFIG_NFS_V4_2)
8477 [2] = &nfs_v4_2_minor_ops,
8478#endif
97dc1359
TM		 8479};
8480
17f26b12 8481static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8482 .create = nfs_create,
8483 .lookup = nfs_lookup,
8484 .atomic_open = nfs_atomic_open,
8485 .link = nfs_link,
8486 .unlink = nfs_unlink,
8487 .symlink = nfs_symlink,
8488 .mkdir = nfs_mkdir,
8489 .rmdir = nfs_rmdir,
8490 .mknod = nfs_mknod,
8491 .rename = nfs_rename,
8492 .permission = nfs_permission,
8493 .getattr = nfs_getattr,
8494 .setattr = nfs_setattr,
8495 .getxattr = generic_getxattr,
8496 .setxattr = generic_setxattr,
8497 .listxattr = generic_listxattr,
8498 .removexattr = generic_removexattr,
8499};
8500
92e1d5be 8501static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8502 .permission = nfs_permission,
8503 .getattr = nfs_getattr,
8504 .setattr = nfs_setattr,
64c2ce8b
AK		 8505 .getxattr = generic_getxattr,
8506 .setxattr = generic_setxattr,
8507 .listxattr = generic_listxattr,
8508 .removexattr = generic_removexattr,
6b3b5496
BF		 8509};
8510
509de811 8511const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8512 .version = 4, /* protocol version */
8513 .dentry_ops = &nfs4_dentry_operations,
8514 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8515 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8516 .file_ops = &nfs4_file_operations,
1da177e4 8517 .getroot = nfs4_proc_get_root,
281cad46 8518 .submount = nfs4_submount,
ff9099f2 8519 .try_mount = nfs4_try_mount,
1da177e4
LT		 8520 .getattr = nfs4_proc_getattr,
8521 .setattr = nfs4_proc_setattr,
8522 .lookup = nfs4_proc_lookup,
8523 .access = nfs4_proc_access,
8524 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8525 .create = nfs4_proc_create,
8526 .remove = nfs4_proc_remove,
8527 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8528 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8529 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8530 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8531 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8532 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8533 .link = nfs4_proc_link,
8534 .symlink = nfs4_proc_symlink,
8535 .mkdir = nfs4_proc_mkdir,
8536 .rmdir = nfs4_proc_remove,
8537 .readdir = nfs4_proc_readdir,
8538 .mknod = nfs4_proc_mknod,
8539 .statfs = nfs4_proc_statfs,
8540 .fsinfo = nfs4_proc_fsinfo,
8541 .pathconf = nfs4_proc_pathconf,
e9326dca 8542 .set_capabilities = nfs4_server_capabilities,
1da177e4 8543 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8544 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8545 .read_setup = nfs4_proc_read_setup,
ec06c096 8546 .read_done = nfs4_read_done,
1da177e4 8547 .write_setup = nfs4_proc_write_setup,
788e7a89 8548 .write_done = nfs4_write_done,
1da177e4 8549 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8550 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8551 .commit_done = nfs4_commit_done,
1da177e4 8552 .lock = nfs4_proc_lock,
e50a1c2e 8553 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8554 .close_context = nfs4_close_context,
2b484297 8555 .open_context = nfs4_atomic_open,
011e2a7f 8556 .have_delegation = nfs4_have_delegation,
57ec14c5 8557 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8558 .alloc_client = nfs4_alloc_client,
45a52a02 8559 .init_client = nfs4_init_client,
cdb7eced 8560 .free_client = nfs4_free_client,
1179acc6
BS		 8561 .create_server = nfs4_create_server,
8562 .clone_server = nfs_clone_server,
1da177e4
LT		 8563};
8564
64c2ce8b
AK		 8565static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8566 .prefix = XATTR_NAME_NFSV4_ACL,
8567 .list = nfs4_xattr_list_nfs4_acl,
8568 .get = nfs4_xattr_get_nfs4_acl,
8569 .set = nfs4_xattr_set_nfs4_acl,
8570};
8571
8572const struct xattr_handler *nfs4_xattr_handlers[] = {
8573 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8574#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8575 &nfs4_xattr_nfs4_label_handler,
8576#endif
64c2ce8b
AK		 8577 NULL
8578};
8579
1da177e4
LT		 8580/*
8581 * Local variables:
8582 * c-basic-offset: 8
8583 * End:
8584 */
Linux kernel - Deliverables
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